JP2005189733A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector which can be used held even by hand, in order to project and to display images freely, in the desired direction. <P>SOLUTION: This projector has an image forming section to form an image to be projected, and a projection optical system to project and display the image on a projection plane. Further, the projector has a joggle sensor for detecting the shaking of the projector, and a stabilizer section for reducing the amount of movement on the projection plane caused by the shaking projector, based on the output signals of the joggle sensor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projector capable of projecting and displaying an image on a projection surface while being held by hand.

2. Description of the Related Art Conventionally, there is known a projector that displays an image light-modulated by a liquid crystal panel or the like by enlarging and projecting it on a screen surface with a projection lens. Such a projector is usually placed on a table surface such as a desk surface, and an image is enlarged and projected on a screen surface (for example, Patent Document 1).
International Publication No. WO97 / 01787 Pamphlet

  However, since conventional projectors are originally configured to be projected and displayed on a table surface such as a desk surface, they are suitable for projecting and displaying images freely in a desired direction and on a desired projection surface. It wasn't. Further, the conventional projector has not been portable so that it can be easily carried to a desired place and projected and displayed.

  In particular, while the improvement in portability due to the downsizing of information devices such as notebook computers and portable information terminals has been remarkable in recent years, conventional stationary projectors output information devices with improved portability. It was not always suitable for projecting and displaying images.

  The present invention has been made to solve at least one of the above problems, and provides a projector capable of projecting and displaying an image freely in a desired direction.

  In order to solve the above problems, a projector according to a first aspect of the present invention includes a projection image forming unit that forms a projection image, and a projection that displays the projection image by projecting the projection image onto a projection plane. A projector having an optical system, wherein the projector detects a shake of the projector, and the projection image generated by the shake of the projector based on a shake signal detected by the shake sensor. And a shake correction unit for reducing the amount of movement on the projection plane.

  A projector according to a second aspect of the present invention is the projector according to the first aspect, wherein the blur correction unit corrects an optical path of the projection optical system to correct movement of the projection image on the projection plane. The amount is reduced.

  A projector according to a third aspect of the present invention is the projector according to the second aspect, wherein the projection optical system includes an optical path correction lens in the optical path, and the projection is performed by changing a position of the optical path correction lens. It corrects the optical path of the optical system.

  A projector according to a fourth aspect of the present invention is the projector according to the second aspect, wherein the projection optical system includes a reflecting mirror having a reflecting surface in the optical path, and changes a surface direction of the reflecting surface. To correct the optical path of the projection optical system.

  A projector according to a fifth aspect of the present invention is the projector according to the second aspect, wherein the projection optical system includes a variable apex angle prism in the optical path, and changes an apex angle of the variable apex angle prism. The optical path of the projection optical system is corrected by changing the optical path of the projection optical system.

  A projector according to a sixth aspect of the present invention is the projector according to the first aspect, wherein the projected image forming unit includes a display surface for displaying and forming the projected image, and the projected image Is corrected, the amount of movement of the projection image on the projection plane is reduced.

  A projector according to a seventh aspect of the present invention is the projector according to the sixth aspect, and corrects the position where the projection image is displayed by moving the position of the display surface.

  A projector according to an eighth aspect of the present invention is the projector according to the sixth aspect, wherein a position where the projection image is displayed is moved by moving a display position of the projection image on the display surface. It is to correct.

  A projector according to a ninth aspect of the present invention is a projector including any one of the projectors according to the first to eighth aspects, and includes a detachable fixing member.

  A projector according to a tenth aspect of the present invention is a projector including any one of the projectors according to the first to ninth aspects, and includes a grip portion that is at least partially easy to grip.

  The projector according to the present invention includes a shake sensor that detects the shake of the projector, and reduces the amount of change in the projection direction of the projection light based on the shake signal output from the shake sensor. An image can be projected and displayed freely in a desired direction.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[First Embodiment]
The projector according to the present embodiment includes a sensor that detects camera shake of the projector itself, and moves the projection image on the projection plane by moving the optical path correction lens and correcting the optical path of the projection optical system based on the camera shake amount signal. It is characterized by reducing the amount.

  FIG. 1 is a block diagram illustrating the configuration of the projector according to the present embodiment, FIG. 4 is a perspective view illustrating an overview of the projector according to the present embodiment, and FIG. 5 is a diagram illustrating the principle that the projector according to the present embodiment corrects camera shake. is there.

  In FIG. 1, a projector 100 according to this embodiment includes an X-axis direction angular velocity sensor 1, a Y-axis direction angular velocity sensor 2, an X-axis direction output processing circuit 3, a Y-axis direction output processing circuit 4, and a Y-axis direction camera shake correction control circuit. 5, X-axis direction image stabilization control circuit 6, Y-axis direction drive amplifier 7, X-axis direction drive amplifier 8, Y-axis direction actuator 9, X-axis direction actuator 10, projection optical system 11, liquid crystal display element 12, and display circuit 14 , LED light source 13 and illumination circuit 15.

  The LED light source 13 is composed of a light emitting diode that emits white light, emits light to be modulated, and illuminates the liquid crystal display element 12. As a light source, a xenon lamp, a metal halide lamp, and a tungsten lamp can be used in addition to the light emitting diode that emits white light. Moreover, you may use LED which radiates | emits the light of each color of red, green, and blue. The light source is not particularly limited as long as it has a high luminance.

  The illumination circuit 15 drives the LED light source 13 for light emission.

  The liquid crystal display element 12 receives the light emitted from the LED light source 13, and spatially modulates the incident light to transmit or reflect it, thereby displaying and forming a projected image on the display surface.

  In addition to the liquid crystal display element 12, as elements for displaying a projected image, a DMD element and an electrochromic display (ECD) in which a large number of micromirrors are laid to function as optical switches are also used. VFD can also be used. When the self-luminous type is used, the LED light source 13 is not necessary.

  The display circuit 14 is driven to display a predetermined projection image on the liquid crystal display element 12 based on the image signal. The display circuit 14 also has a function of correcting the color tone such as the hue, color density, white balance, etc. of the projected image, correcting the trapezoidal distortion of the projected image that occurs when the projection surface is oblique, and performing digital zoom. May be. Note that the image signal may be captured not from the outside but from a compact flash card (registered trademark) or the like inserted into a slot provided in the projector 100 itself.

  4 and 1, the projection optical system 11 of the projector 100 according to the present embodiment includes an optical path correction lens 26 that can move independently in the X-axis direction and the Y-axis direction. It is characterized in that the light beam direction of the light emitted to the projection plane 30 can be varied by moving it substantially vertically.

  In this specification, a light beam means a center line of a light beam that is emitted from a projected image, passes through the projection optical system, and exits the projection optical system toward the projection surface, and particularly from the center of the projected image. A light beam corresponding to the emitted light beam is called a central light beam. In a projection optical system using a lens, the central ray usually coincides with the optical axis of the lens.

  The projection optical system 100 according to the present embodiment includes a lens or a reflecting mirror, projects the modulated light spatially modulated by the liquid crystal display element 12 onto the projection surface 30, and projects and displays an image on the projection surface 30. In other words, the projection optical system 11 receives the projection image light displayed by the liquid crystal display element 12 and forms a projection image on the projection plane 30. Note that the projection optical system 11 may be provided with a focusing mechanism so that a projected image in focus is automatically formed on the projection surface 30.

  The optical path correction lens 26 constituting the projection optical system 11 of the projector 100 according to the present embodiment is configured to be able to move independently in the Y-axis direction by the Y-axis direction actuator 9 and in the X-axis direction by the X-axis direction actuator 10. Has been.

  1 and 4, the X-axis direction angular velocity sensor 1 of the projector 100 according to the present embodiment detects the rotational angular velocity around an axis parallel to the X axis, that is, the camera shake velocity in the Y-axis direction. The direction angular velocity signal is output to the X-axis direction output processing circuit 3.

  The X-axis direction output processing circuit 3 of the projector 100 according to the present embodiment generates a camera shake amount signal for giving a camera shake amount in the Y-axis direction by performing an integration process on the X-axis direction angular velocity signal, and the Y-axis direction camera shake correction control circuit 5. Output to.

  The Y-axis direction camera shake correction control circuit 5 of the projector 100 according to the present embodiment calculates a movement amount due to camera shake in the Y-axis direction of the projected image on the projection plane 30 based on the input Y-axis direction camera shake amount signal. Y-axis direction movement that calculates the amount of movement of the optical path correction lens 26 in the Y-axis direction necessary to cancel the movement of the projected image in the Y-axis direction by optical path correction by the optical path correction lens 26 and gives this predetermined movement amount A quantity signal is generated and output to the Y-axis direction drive amplifier 7.

  The Y-axis direction drive amplifier 7 of the projector 100 according to the present embodiment generates a predetermined drive signal for moving the optical path correction lens 26 by a predetermined amount of movement in the Y-axis direction, and outputs it to the Y-axis direction actuator 9.

  The Y-axis direction actuator 9 of the projector 100 of the present embodiment drives the optical path correction lens 26 by a predetermined movement amount in the Y-axis direction based on a predetermined drive signal.

  As described above, the functions of the X-axis direction angular velocity sensor 1, the X-axis direction output processing circuit 3, the X-axis direction camera shake correction control circuit 5, the Y-axis direction drive amplifier 7, and the Y-axis direction actuator 9 of the projector 100 of this embodiment. Explained. Regarding the functions of the Y-axis direction angular velocity sensor 2, the Y-axis direction output processing circuit 4, the X-axis direction camera shake correction control circuit 6, the X-axis direction drive amplifier 8, and the X-axis direction actuator 10 of the projector 100 of the present embodiment. If X is replaced with Y and Y is replaced with X, the above description can be applied as it is.

  Hereinafter, with reference to FIG. 4 and FIG. 1, when the projector 100 of the present embodiment displays a projection image on the projection plane 30 while being held by a hand, an optical path correction operation that reduces the movement of the projection image caused by camera shake. Will be explained.

  In FIG. 4, when the projector 100 is shaken when the projector 100 is held by the hand, a shake occurs in the projected image on the projection surface 30, and at the same time, the X-axis direction angular velocity sensor 1 detects the shake rate in the Y-axis direction. The X-axis direction output processing circuit 3 outputs a camera shake amount signal in the Y-axis direction to the Y-axis direction camera shake correction control circuit 5.

  Next, the Y-axis direction camera shake correction control circuit 5 calculates the movement amount in the Y-axis direction of the projection image on the projection plane 30 based on the input Y-axis direction camera shake amount signal, and the Y-axis direction of this projection image is calculated. A movement amount in the Y-axis direction of the optical path correction lens 26 necessary for canceling the movement in the direction by correcting the optical path by the optical path correction lens 26 is calculated, and a Y-axis direction movement amount signal that gives this predetermined movement amount is generated. To the Y-axis direction drive amplifier 7.

  Subsequently, the Y-axis direction drive amplifier 7 outputs a predetermined drive signal for moving the optical path correction lens 26 by a predetermined amount of movement in the Y-axis direction to the Y-axis direction actuator 9, and the Y-axis direction actuator 9 The correction lens 26 is driven by a predetermined movement amount in the Y-axis direction.

  The movement in the Y-axis direction of the projection image caused by camera shake as described above is canceled by moving the optical path correction lens 26 in the Y-axis direction to correct the optical path.

  Similarly, the movement in the X-axis direction of the projected image caused by camera shake is canceled by moving the optical path correction lens 26 in the X-axis direction to correct the optical path.

  Accordingly, the movement of the projection image caused by camera shake is canceled by moving the optical path correction lens 26 by a predetermined amount in the Y-axis direction and the X-axis direction to correct the optical path, and the projection image does not substantially move.

  Hereinafter, the principle of optical path correction will be described so that the projector 100 of the present embodiment does not move when the camera shake occurs.

  In this description, for the sake of simplicity, an example will be described in which the projector 100 moves parallel to the Y axis due to camera shake. When the optical path correction lens 26 does not move the lens for optical path correction, the optical axis of the optical path correction lens 26 coincides with the optical axis of the projection optical system 11, and the optical axis direction of the correction lens 26 is the central ray. It is assumed that it matches the direction of. In this state, the central ray is emitted in the optical axis direction.

  In FIG. 5, before camera shake, the projector 100 is in a position indicated by a dotted rectangle, the liquid crystal display element 12 is in a position indicated by a dotted line in the projector 100, and the projection optical system is in a position (not shown) in the projector 100. In this projection optical system, the optical path correction lens 26 is in a position indicated by a dotted line, and the optical axis of the optical path correction lens 26 is indicated by a dotted line 31. At this time, a central ray is emitted from a projection optical system (not shown) along the optical axis 31 indicated by a dotted line, and the central point of the projection image is displayed at position A on the projection plane 30.

  The projector 100 moves to a position indicated by a solid rectangle after camera shake due to camera shake. When the optical path correction lens 26 is not moved along with this movement, the display element 12 is at the position indicated by the solid line, the projection optical system is at the position not shown, and the optical path correction lens in the projection optical system (not shown). 26 moves together for the distance to the position indicated by the solid line. At this time, the light emitted from the projection optical system 11 is emitted along the optical axis 32 of the optical path correction lens indicated by the solid line, and the projection image is displayed at the position B on the projection plane 30. The center point of the projected image moves from position A to position B, making it difficult to observe the projected image. The projector 100 according to the present embodiment moves the optical path correction lens 26 in the Y-axis direction until the optical axis thereof is positioned as indicated by the alternate long and short dash line 35 when camera shake occurs. The movement amount of the optical path correction lens 26 is indicated by 34 and is equal to the predetermined movement amount in the Y-axis direction obtained by the Y-axis direction camera shake correction control circuit 5. When the position of the optical axis of the optical path correction lens 26 moves to the position of the alternate long and short dash line 35, the optical path correction lens 26 refracts the central ray incident along the exit optical axis 32 by an angle θ and in the direction indicated by the alternate long and short dash line 33. A central ray is emitted toward point A. As a result, the center point of the projected image moves from the B position to the A position by the optical path correction by the movement of the optical path correction lens 26.

  Since the optical path correction lens 26 is moved also in the X-axis direction as described above, even if the projector 100 shakes in any direction, the center point of the projected image is continuously displayed at the A position. Is reduced to such an extent that there is no practical problem.

  As described above, according to the projector of this embodiment, the camera shake sensor that detects the camera shake of the projector is provided, and the projection image is moved by moving the optical path correction lens according to the camera shake amount signal. Since the amount of movement of the projection image is reduced by canceling out the movement, a stable and easy-to-see projection image can be formed even from an unstable posture such as holding the projector by hand.

[Second Embodiment]
The projector according to the present embodiment includes a sensor that detects camera shake of the projector itself, and is the first in that the amount of movement of the projected image on the projection plane is reduced by correcting the optical path of the projection optical system based on the camera shake amount signal. Although common to the projector according to the embodiment, the projection optical system is constituted by a reflecting mirror, and the projection optical system is characterized in that the optical path is corrected by changing the direction of the reflecting mirror.

  FIG. 1 is a block diagram showing the configuration of the projector of this embodiment, FIG. 6 shows how the projector 100 of this embodiment projects a projection image onto the projection plane 30, and FIG. 7 shows the P portion of the projector 100 shown in FIG. An enlarged view is shown.

  In FIG. 1, a projector 100 according to the present embodiment is similar to the projector according to the first embodiment in that an X-axis direction angular velocity sensor 1, a Y-axis direction angular velocity sensor 2, an X-axis direction output processing circuit 3, and a Y-axis direction output processing circuit. 4, Y-axis direction image stabilization control circuit 5, X-axis direction image stabilization control circuit 6, Y-axis direction drive amplifier 7, X-axis direction drive amplifier 8, Y-axis direction actuator 9, X-axis direction actuator 10, projection optical system 11 , A liquid crystal display element 12, a display circuit 14, an LED light source 13, and an illumination circuit 15.

  X-axis direction angular velocity sensor 1, Y-axis direction angular velocity sensor 2, X-axis direction output processing circuit 3, Y-axis direction output processing circuit 4, liquid crystal display element 12, display circuit 14, LED light source provided in projector 100 of the present embodiment 13 and the function of the illumination circuit 15 are basically the same as those provided in the projector according to the first embodiment, and therefore the description in the column of the first embodiment can be referred to for each function.

  In the following description, items unique to the projector of the second embodiment will be mainly described.

  In FIG. 7, the projector 100 of the present embodiment includes a first reflecting mirror 28 and a second reflecting mirror 29 as the projection optical system 11, and is attached to the second reflecting mirror 29, and the Y-axis direction actuator 9 and the X-axis actuator 9. An axial actuator 10 is provided. The second reflecting mirror 29 is secondly moved by the X-axis direction actuator 10 around the central axis parallel to the X-axis (direction perpendicular to the paper surface) passing through the reflecting surface 38 of the second reflecting mirror 28 by the Y-axis direction actuator 9. Each of the mirrors 28 is configured to be independently rotatable about a central axis parallel to a Y axis (a direction parallel to the paper surface) passing through the reflecting surface 38 of the reflecting mirror 28.

  In FIG. 7, the first reflecting mirror 28 has a concave reflecting surface 37, and the light beam 36 emitted from the liquid crystal display element 12 is incident and reflected toward the second reflecting mirror 29.

  The second reflecting mirror 29 has a convex reflecting surface 38, enters the light beam reflected by the first reflecting mirror 28, and emits it toward the projection surface 30.

  The Y-axis direction camera shake correction control circuit 5 of the projector 100 according to the present embodiment calculates the amount of movement of the projection image on the projection plane 30 in the Y-axis direction based on the input Y-axis direction camera shake amount signal. The rotation angle of the second reflecting mirror 29 necessary for canceling the movement of the second reflecting mirror 29 by the optical path correction caused by the rotation of the second reflecting mirror 29 about the axis parallel to the X axis is calculated to obtain this predetermined rotation angle. Is generated and output to the Y-axis direction drive amplifier 7.

  The Y-axis direction drive amplifier 7 of the projector 100 according to the present embodiment generates a predetermined drive signal for rotating the second reflecting mirror 29 by a predetermined rotation angle around an axis parallel to the X axis, and generates a Y-axis direction actuator. Output to 9.

  The Y-axis direction actuator 9 of the projector 100 according to the present embodiment rotates the second reflecting mirror 29 by a predetermined rotation angle about an axis parallel to the X axis based on a predetermined drive signal.

  With respect to the functions of the X-axis direction camera shake correction control circuit 6, the X-axis direction drive amplifier 8, and the X-axis direction actuator 10, the above description can be applied as it is by replacing X with Y and Y with X.

  Hereinafter, with reference to FIGS. 7 and 1, an operation for correcting camera shake of a projected image when the projector 100 according to the present embodiment displays the projected image on the projection surface 30 while being held by a hand will be described.

  In FIG. 7, before the occurrence of camera shake, the projector 100 is in a position indicated by a dotted line, and the liquid crystal display element 12 and the reflecting mirrors 28 and 29 are in a position indicated by a dotted line. At this time, light rays emitted from predetermined points of the projected image displayed on the liquid crystal display element 12 are reflected by the reflecting mirrors 28 and 29, and each point of A, B, and C on the projection surface 30 shown in FIG. Projected on.

  In FIG. 1, when the projector 100 is shaken when the projector 100 is held and projected, the projector 100 moves to a position indicated by a solid line in FIG. 7, among which the liquid crystal display element 12 and the reflecting mirror 28 are moved. 29 move together to the position indicated by the solid line.

  At this time, if the optical path is not corrected, the light beam emitted from each predetermined point of the projected image is projected to a point (not shown) moved from each point A, B, C on the projection plane 30 shown in FIG. The

  In the projector 100 of the present embodiment, the X-axis direction angular velocity sensor 1 detects the camera shake speed in the Y-axis direction at the same time that the projection image on the projection surface 30 moves, and the X-axis direction output processing circuit 3 The direction camera shake amount signal is output to the Y-axis direction camera shake correction control circuit 5.

  Next, the Y-axis direction camera shake correction control circuit 5 calculates the movement amount in the Y-axis direction of the projection image on the projection plane 30 based on the input Y-axis direction camera shake amount signal, and the Y-axis direction of this projection image is calculated. The rotation angle of the second reflecting mirror 29 about the axis parallel to the X axis is calculated to cancel the movement of the direction by correcting the optical path by rotating the second reflecting mirror 29 about the axis parallel to the X axis. Then, a Y-axis direction movement amount signal giving this predetermined rotation angle is generated and output to the Y-axis direction drive amplifier 7.

  Subsequently, the Y-axis direction drive amplifier 7 outputs a predetermined drive signal for moving the second reflecting mirror 29 by a predetermined rotation angle around an axis parallel to the X-axis to the Y-axis direction actuator 9, and the Y-axis direction The actuator 9 rotates the second reflecting mirror 29 by a predetermined rotation angle around an axis parallel to the X axis.

  The movement of the projected image in the Y-axis direction caused by camera shake as described above is canceled by rotating the second reflecting mirror 29 by a predetermined rotation angle about an axis parallel to the X-axis to correct the optical path.

  Similarly, the movement in the X-axis direction of the projected image caused by camera shake is canceled by rotating the second reflecting mirror 29 by a predetermined rotation angle about an axis parallel to the Y-axis to correct the optical path.

  Therefore, the movement of the projection image caused by camera shake is canceled by rotating the second reflecting mirror 29 around the axis parallel to the X axis and the axis parallel to the Y axis by a predetermined rotation angle to correct the optical path, The movement of the projected image is reduced to such a degree that there is no practical problem.

  The state of optical path correction as described above is shown in FIGS. 6 and 7 show a state in which light rays emitted from predetermined points of the projection image are continuously projected onto points A, B, and C on the projection surface 30 despite camera shake. Show.

  As described above, according to the projector of the present embodiment, the camera shake sensor that detects the camera shake of the projector is provided, the projection image is moved by rotating the second reflecting mirror 29 according to the camera shake amount signal, and the projection caused by the camera shake is generated. Since the movement amount of the projection image is reduced by canceling the movement of the image, a stable and easy-to-see projection image can be formed even from an unstable posture such as holding the projector by hand.

  In the above description of the present embodiment, the example in which the optical path is corrected by the rotation of the second reflecting mirror 29 has been described. However, in the present invention, the projector that corrects the optical path by the rotation of the first reflecting mirror 28 is not limited to the first reflecting mirror 28 and the second reflecting mirror 29. Needless to say, a projector that corrects the optical path by rotating both of the reflecting mirrors 29 is also included.

[Third Embodiment]
The projector according to the present embodiment includes a sensor that detects camera shake of the projector itself, and is the first in that the amount of movement of the projected image on the projection plane is reduced by correcting the optical path of the projection optical system based on the camera shake amount signal. Although common to the projector according to the embodiment, the projection optical system includes a vari-angle prism, and the projection optical system 11 is characterized in that the optical path is corrected by changing the angle of the vari-angle prism.

  FIG. 1 is a block diagram showing the configuration of the projector 100 of this embodiment, and FIG. 8 is a conceptual diagram showing how the projector 100 of this embodiment projects a projection image onto the projection plane 30.

  In FIG. 1, a projector 100 according to the present embodiment is similar to the projector according to the first embodiment in that an X-axis direction angular velocity sensor 1, a Y-axis direction angular velocity sensor 2, an X-axis direction output processing circuit 3, and a Y-axis direction output processing circuit. 4, Y-axis direction image stabilization control circuit 5, X-axis direction image stabilization control circuit 6, Y-axis direction drive amplifier 7, X-axis direction drive amplifier 8, Y-axis direction actuator 9, X-axis direction actuator 10, projection optical system 11 , A liquid crystal display element 12, a display circuit 14, an LED light source 13, and an illumination circuit 15.

  X-axis direction angular velocity sensor 1, Y-axis direction angular velocity sensor 2, X-axis direction output processing circuit 3, Y-axis direction output processing circuit 4, liquid crystal display element 12, display circuit 14, LED light source provided in projector 100 of the present embodiment 13 and the function of the illumination circuit 15 are basically the same as those provided in the projector according to the first embodiment, and therefore the description in the column of the first embodiment can be referred to for each function.

  In the following description, items unique to the projector of the third embodiment will be mainly described.

  In FIG. 8, the projection optical system 11 provided in the projector 100 of the present embodiment includes a projection lens 39 and a vari-angle prism 40, enters light emitted from the liquid crystal display element 12, and projects a projection image onto the projection plane 30. Project above. Here, although the projection lens actually incorporates a plurality of lenses, it will be described as a single lens for convenience.

  The vari-angle prism 40 enters the light beam emitted from the projection lens 39 and emits the light beam by changing the direction.

  The vari-angle prism 40 is configured by enclosing a liquid with a high refractive index in a space surrounded by two plane plates, and the angle between the two plane plates is wedge-shaped while keeping the ridge line direction parallel to the X axis. By the prism action generated by this, light incident from one flat plate can be emitted from the other flat plate while changing its direction in the Y-axis direction by the deviation angle. Furthermore, since the vari-angle prism 40 is configured such that the angle between the two flat plates, that is, the apex angle, can be freely changed by the Y-axis direction actuator 9, the exit direction of the exit beam with respect to the incident beam. The angle of deviation in the Y-axis direction can be freely changed. Therefore, when the light beam emitted from the projection lens 39 passes through the variangle prism 40, the magnitude of the deflection angle in the Y-axis direction of the light beam emitted from the projection optical system 11 can be varied.

  In FIG. 1, the Y-axis direction camera shake correction control circuit 5 of the projector 100 according to the present embodiment firstly moves the projected image on the projection plane 30 in the Y-axis direction based on the input Y-axis direction camera shake amount signal. Is calculated. Then, the magnitude of the deflection angle of the variangle prism 40 necessary for canceling out the movement of the projected image in the Y-axis direction by correcting the optical path by the deflection angle due to refraction at the variangle prism 40, and the deviation angle of this magnitude A Y-axis direction vertical angle signal giving a predetermined vertical angle necessary for refraction is generated and output to the Y-axis direction drive amplifier 7.

  The Y-axis direction drive amplifier 7 of the projector 100 according to the present embodiment generates a predetermined drive signal for setting the vertex angle of the vari-angle prism 40 to a predetermined vertex angle, and outputs it to the Y-axis direction actuator 9.

  The Y-axis direction actuator 9 of the projector 100 according to the present embodiment sets the vertex angle of the vari-angle prism 40 to a predetermined magnitude based on a predetermined drive signal.

  The projector 100 according to the present embodiment shown in FIG. 8 includes another vari-angle prism (not shown) at a position that crosses the optical axis 31 and is adjacent to the vari-angle prism 40. This vari-angle prism (not shown) is a vari-angle prism having the same function as the vari-angle prism 40 described above, and is provided by being rotated 90 degrees around the optical axis 31. This vari-angle prism (not shown) is configured such that the ridge line direction of the wedge is in a direction parallel to the Y axis, and the apex angle is variable by the X axis direction actuator 10. This vari-angle prism (not shown) can change the light beam in the X-axis direction by refraction.

  Regarding the functions of the X-axis direction image stabilization control circuit 6, the X-axis direction drive amplifier 8, and the X-axis direction actuator 10 related to this vari-angle prism not shown, X is set to Y and Y is set to X. In other words, the description related to the vari-angle prism 40 can be applied as it is.

  Hereinafter, with reference to FIGS. 8 and 1, an operation for correcting camera shake of a projected image when the projector 100 according to the present embodiment displays the projected image on the projection surface 30 while being held by a hand will be described.

  In FIG. 1, when the projector 100 is shaken when the projector 100 is held by hand, the projected image on the projection surface 30 is moved, and at the same time, the X-axis direction angular velocity sensor 1 detects the shake rate in the Y-axis direction. The X-axis direction output processing circuit 3 outputs a camera shake amount signal in the Y-axis direction to the Y-axis direction camera shake correction control circuit 5.

  Next, the Y-axis direction camera shake correction control circuit 5 calculates the movement amount in the Y-axis direction of the projection image on the projection plane 30 based on the input Y-axis direction camera shake amount signal, and the Y-axis direction of this projection image is calculated. Calculates the declination necessary to correct the optical path by changing the direction of the light beam due to the refraction of the vari-angle prism 40 and offset the movement of the direction, and the apex angle required to change the direction of the light beam by this declination. A Y-axis direction vertical angle signal giving the predetermined vertical angle is generated and output to the Y-axis direction drive amplifier 7.

  Subsequently, the Y-axis direction drive amplifier 7 outputs a drive signal for setting the vertex angle of the vari-angle prism 40 to a predetermined vertex angle to the Y-axis direction actuator 9, and the Y-axis direction actuator 9 The apex angle is set to a predetermined apex angle.

  As described above, the movement in the Y-axis direction of the projection image caused by camera shake is refracted in the Y-axis direction by a predetermined deviation angle by causing the light beam exiting the projection lens 39 to enter the vari-angle prism 40, thereby correcting the optical path. Is offset by doing.

  Similarly, the movement in the X-axis direction of the projection image caused by camera shake is performed by correcting the optical path by refracting a light beam emitted from the projection lens 39 in the X-axis direction by a predetermined declination angle so as to enter the vari-angle prism. Is offset by

  Hereinafter, the principle of correcting the camera shake so that the projector 100 of the present embodiment does not move in the projected image will be described. In this description, for the sake of simplicity, an example will be described in which the projector 100 moves parallel to the Y axis due to camera shake.

  In FIG. 8, before the camera shake, the projector 100 is in a position indicated by a dotted rectangle, and the liquid crystal display element 12, the projection lens 39, and the vari-angle prism 40 in the projector 100 are in positions indicated by dotted lines. The optical axis of the projection lens 39 at that time is indicated by a dotted line 31. If the apex angle of the vari-angle prism 40 is set to zero when there is no camera shake, the vari-angle prism 40 does not refract the incident light beam emitted from the projection lens 39, and thus is emitted in the direction of the optical axis 31 and the center of the projection image. The point is displayed at position A on the projection plane 30.

The projector 100 moves to a position indicated by a solid rectangle after camera shake due to camera shake. Along with this movement,
In the projector 100, the liquid crystal display element 12, the projection lens 39, and the variangle prism 40 move together at equal distances to the positions indicated by the solid lines. At this time, if the vertex angle of the vari-angle prism 40 remains zero, the light emitted from the projection optical system 11 is emitted in the direction of the optical axis 32 indicated by the solid line, and the projected image is at the B position on the projection plane 30. The center point of the projected image moves from the A position to the B position due to camera shake, making it difficult to observe the projected image. In the projector 100 according to the present embodiment, the vertical angle of the vari-angle prism 40 is set to a predetermined vertical angle as indicated by a solid line when camera shake occurs. The vari-angle prism having the predetermined apex angle is adjusted so that the light beam is refracted by the declination angle θ and is emitted as indicated by the alternate long and short dash line. As a result, the center point of the projected image is moved from the B position to the A position. Let

  The optical path correction by the vari-angle prism 40 as described above can be performed in the X-axis direction using a vari-angle prism (not shown).

  Accordingly, the movement of the projection image caused by camera shake causes the light beam exiting the projection lens 39 to be refracted by the vari-angle prism 40 in the Y-axis direction by a predetermined declination angle θ, and at the same time by a predetermined declination angle by an unillustrated vari-angle prism. By correcting the optical path by refracting in the direction, the movement of the projected image is reduced to a practically acceptable level.

  As described above, according to the projector of this embodiment, the projection image is moved by the optical path correction that includes the camera shake sensor that detects the camera shake of the projector and refracts the light beam emitted from the projection lens by the vari-angle prism according to the camera shake amount signal. Since the amount of movement of the projection image is reduced by canceling out the movement of the projection image caused by camera shake, a stable and easy-to-see projection image can be formed even from an unstable posture such as holding the projector by hand. .

  In the above description of the present embodiment, the example in which two vari-angle prisms are used for correcting the Y-axis direction and the X-axis direction has been described. However, not only the apex angle but also the wedge ridge line direction is driven in the X-axis direction and the Y-axis direction. If a variable variangle prism that is variable according to the signal is used, the optical path can be corrected by changing the refraction angle and the refraction direction with one variangle prism. Further, the vari-angle prism may be disposed behind the projection lens as described in the present embodiment, or may be disposed in front of the projection lens.

[Fourth Embodiment]
The projector according to the present embodiment includes a sensor that detects camera shake of the projector itself, and based on a camera shake amount signal from the sensor, corrects the position of the projected image displayed by the liquid crystal display element by moving the position of the liquid crystal display element. Thus, the amount of movement of the projected image on the projection surface is reduced.

  FIG. 2 is a block diagram showing the configuration of the projector 100 of this embodiment, and FIG. 9 is a conceptual diagram showing how the projector 100 of this embodiment corrects camera shake.

  In FIG. 2, the projector 100 of the present embodiment is similar to the projector of the first embodiment in that the X-axis direction angular velocity sensor 1, the Y-axis direction angular velocity sensor 2, the X-axis direction output processing circuit 3, and the Y-axis direction output processing circuit. 4, Y-axis direction image stabilization control circuit 5, X-axis direction image stabilization control circuit 6, Y-axis direction drive amplifier 7, X-axis direction drive amplifier 8, Y-axis direction actuator 9, X-axis direction actuator 10, projection optical system 11 , A liquid crystal display element 12, a display circuit 14, an LED light source 13, and an illumination circuit 15.

  X-axis direction angular velocity sensor 1, Y-axis direction angular velocity sensor 2, X-axis direction output processing circuit 3, Y-axis direction output processing circuit 4, projection optical system 11, liquid crystal display element 12, display Since the functions of the circuit 14, the LED light source 13, and the illumination circuit 15 are basically the same as those provided in the projector of the first embodiment, refer to the description of the column of the first embodiment for each function. it can.

  In the following description, items unique to the projector of the fourth embodiment will be mainly described.

  The liquid crystal display element 12 of the projector 100 according to the present embodiment has a liquid crystal display element itself that displays an image to be projected in the Y-axis direction by the Y-axis direction actuator 9 in addition to the functions described in the first embodiment. The directional actuator 10 can be moved in the X-axis direction. Due to the movement of the liquid crystal display element 12, the projection screen moves a distance equal to the movement distance.

  The Y-axis direction camera shake correction control circuit 5 of the projector 100 according to the present embodiment calculates the amount of movement of the projection image on the projection plane 30 in the Y-axis direction based on the input Y-axis direction camera shake amount signal. Y-axis direction for calculating the amount of movement of the projected image necessary for moving the projected image in the reverse direction by a distance equal to the amount of movement in the Y-axis direction, that is, the amount of movement of the liquid crystal display element, and giving this predetermined amount of movement A movement amount signal is generated and output to the Y-axis direction drive amplifier 7.

  The Y-axis direction drive amplifier 7 of the projector 100 according to the present embodiment generates a predetermined drive signal for moving the position of the liquid crystal display element 12 by a predetermined movement amount, and outputs it to the Y-axis direction actuator 9.

  The Y-axis direction actuator 9 of the projector 100 according to the present embodiment drives the liquid crystal display element 12 in the Y-axis direction by a predetermined movement amount based on a predetermined drive signal.

  The functions of the X-axis direction camera shake correction control circuit 6, the X-axis direction drive amplifier 8, and the X-axis direction actuator 10 of the projector 100 according to the present embodiment can be applied as they are if Y is replaced with X.

  Hereinafter, with reference to FIGS. 9 and 2, an operation for correcting camera shake of a projected image when the projector 100 according to the present embodiment displays the projected image on the projection surface 30 while being held by a hand will be described.

  In FIG. 9, the liquid crystal display element 12 that displays the projected image 41 is configured to be movable in a direction substantially perpendicular to the light beam 17 by the Y-axis direction actuator 9 and the X-axis direction actuator 10. Before the camera shake, the projector 100 and the liquid crystal display element 12 are in the position indicated by the dotted line on the left side, the light beam 17 indicated by the dotted line is directed to the point A on the projection plane 30, and the center point of the projected image 41 is projected to the point A. The

  When the projector 100 is shaken when the projector 100 is held and projected, the projector 100 and the liquid crystal display element 12 are moved by the amount equal to the length of the arrow in the direction of the arrow from the position indicated by the dotted line on the left side (the amount of camera shake). Shift to the position indicated by the solid line on the right side.

  At this time, in FIG. 2 and FIG. 9, simultaneously with the movement of the projected image on the projection surface 30, the X-axis direction angular velocity sensor 1 detects the camera shake velocity in the Y-axis direction, and the X-axis direction output processing circuit 3. Outputs a camera shake amount signal in the Y-axis direction to the camera shake correction control circuit 5 in the Y-axis direction.

  Next, the Y-axis direction camera shake correction control circuit 5 calculates the movement amount in the Y-axis direction of the projection image on the projection plane 30 based on the input Y-axis direction camera shake amount signal, and the Y-axis direction of this projection image is calculated. The amount of movement of the liquid crystal display element necessary to move the projected image in the reverse direction by a distance equal to the amount of movement in the direction is calculated, a Y-axis direction movement amount signal giving this predetermined amount of movement is generated, and driving in the Y-axis direction Output to the amplifier 7.

  Subsequently, when the Y-axis direction drive amplifier 7 generates a predetermined drive signal for moving the position of the liquid crystal display element 12 by a predetermined amount of movement and outputs it to the Y-axis direction actuator 9, a liquid crystal display as shown in FIG. The element 12 is moved in the Y-axis direction by a predetermined movement amount.

  Similarly, the liquid crystal display element 12 is moved in the X-axis direction by a predetermined movement amount.

  As described above, the movement in the Y-axis direction and the movement in the X-axis direction of the projection image caused by camera shake cause the liquid crystal display element to move in the opposite directions in the Y-axis direction and the X-axis direction so as to move the projection image in the opposite direction. The light beam 18 indicated by the alternate long and short dash line is directed to the point A, and the center point of the projection image is maintained at the point A (the center position of the projection image) regardless of the movement of the projector 100. This movement is reduced to such an extent that there is no practical problem.

  As described above, according to the projector of the present embodiment, the camera shake sensor that detects the camera shake of the projector is provided, and the liquid crystal display element is moved in the direction perpendicular to the optical axis to cancel the movement of the projected image caused by the camera shake. Since the moving amount of the image is reduced, a stable and easy-to-see projection image can be formed even from an unstable posture such as holding the projector by hand.

[Fifth Embodiment]
The projector of this embodiment includes a sensor that detects camera shake of the projector itself, and is similar to the projector of the fourth embodiment in that the position of the projected image is corrected based on a camera shake amount signal from the sensor. Instead of moving the position of the liquid crystal display device, the display position of the projected image is moved on the display surface of the liquid crystal display element (this display surface corresponds to a region where the optical system can perform projection display). This is different from the projector of the fourth embodiment in that the amount of movement of the projection image due to camera shake on the projection surface is reduced.

  FIG. 3 is a block diagram showing the configuration of the projector 100 of the present embodiment, and FIG. 10 is a conceptual diagram showing how the projector 100 of the present embodiment corrects camera shake.

  In FIG. 3, the projector 100 according to the present embodiment includes an X-axis direction angular velocity sensor 1, a Y-axis direction angular velocity sensor 2, an X-axis direction output processing circuit 3, a Y-axis direction output processing circuit 4, and a Y-axis direction camera shake correction control circuit. 5, X-axis direction camera shake correction control circuit 6, projection optical system 11, liquid crystal display element 12, display position moving function display circuit 16, LED light source 13, and illumination circuit 15.

  X-axis direction angular velocity sensor 1, Y-axis direction angular velocity sensor 2, X-axis direction output processing circuit 3, Y-axis direction output processing circuit 4, projection optical system 11, liquid crystal display element 12, LED Since the functions of the light source 13 and the illumination circuit 15 are basically the same as those provided in the projector according to the first embodiment, the description in the column of the first embodiment can be referred to for each function.

  In the following description, items unique to the projector of the fifth embodiment will be mainly described.

  The Y-axis direction camera shake correction control circuit 5 of the projector 100 according to the present embodiment calculates the amount of movement of the projection image on the projection plane 30 in the Y-axis direction based on the input Y-axis direction camera shake amount signal. The movement amount of the projection image necessary to move the projection image in the reverse direction by a distance equal to the movement amount in the Y-axis direction is calculated, and a Y-axis direction movement amount signal that gives this predetermined movement amount is generated and displayed. It outputs to the display circuit 16 with a position movement function.

  As for the function of the X-axis direction camera shake correction control circuit 6 of the projector 100 according to the present embodiment, the above description can be applied as it is when Y is replaced with X.

  The display circuit 16 with a display position moving function of the projector 100 according to the present embodiment has the following functions in accordance with the functions of the display circuit 14 shown in FIG. 1 provided in the projector according to the first embodiment.

  The display circuit with display position movement function 16 shown in FIG. 3 inputs the Y-axis direction movement amount signal and the X-axis direction movement amount signal of the projected image, and calculates the number of pixel pitches corresponding to these movement amounts. Then, a signal for displaying the projection image based on the image signal is generated by shifting the number of pixel pitches on the display surface, and is output to the liquid crystal display element 12.

  Hereinafter, an operation for correcting camera shake of a projected image when the projector 100 according to the present embodiment displays the projected image on the projection surface 30 while being held by a hand will be described with reference to FIGS. 3, 10, and 15.

  As shown in FIGS. 10 and 15, the projector 100, the liquid crystal display element 12, and the projected image 41 indicated by a checkered pattern are positioned substantially at the center on the display surface 42 as indicated by a dotted line before camera shake. A light ray emitted from the center point of the image 41 is projected at a position indicated by A along the dotted line.

  3, 10, and 15, when the projector 100 is shaken when the projector 100 is held and projected, the projector 100 and the liquid crystal display element 12 move to positions indicated by solid lines in FIG. 10. At the same time as the movement of the projected image on the projection plane 30 occurs due to camera shake, the X-axis direction angular velocity sensor 1 detects the camera shake velocity in the Y-axis direction, and the X-axis direction output processing circuit 3 detects the amount of camera shake in the Y-axis direction. The signal is output to the Y-axis direction camera shake correction control circuit 5.

  Next, the Y-axis direction camera shake correction control circuit 5 calculates the movement amount in the Y-axis direction of the projection image on the projection plane 30 based on the input Y-axis direction camera shake amount signal, and the Y-axis direction of this projection image is calculated. A display position movement function that generates a Y-axis direction movement amount signal that calculates the movement amount of the projection image necessary to move the projection image in the reverse direction by a distance equal to the movement amount in the direction and gives this predetermined movement amount. Output to the display circuit 16.

  Similarly, the X-axis direction camera shake correction control circuit 5 outputs an X-axis direction movement amount signal to the display circuit 16 with a display position movement function.

  Subsequently, the display circuit 16 with a display position movement function calculates the number of pixel pitches corresponding to these movement amounts on the basis of the Y-axis direction movement amount signal and the X-axis direction movement amount signal, and displays this predetermined value on the display surface. A signal for displaying the projection image based on the image signal is generated by shifting the pixel pitch number and output to the liquid crystal display element 12.

  The liquid crystal display element 12 receives this signal from the display circuit 16 with a display position movement function, and displays a projected image while being shifted on the display surface 42 by a predetermined number of pixel pitches.

  The moved projection image 41 is indicated by a solid line in FIGS.

  When the projected image 41 is moved, as shown in FIG. 15, the light beam emitted from the center point of the projected image 41 is projected along the solid line onto the point A on the projection plane 30, and the amount of movement of the projected image due to the camera shake of the projector is It is reduced to the extent that there is no practical problem.

  As described above, the movement of the projected image caused by the camera shake is canceled by displaying the projected image on the display surface 42 while being shifted by the predetermined number of pixel pitches.

  In the projector 100 of the present embodiment, the display surface 42 is wider than the projected image 41 region, and the projection optical system 11 is configured to project the entire display surface 42 onto the projection surface 30. Yes. It is preferable that the display surface 42 other than the projected image 41 is displayed in black so that light emitted from the display surface 42 other than the projected image 41 area does not interfere with the projection image observation.

  As described above, according to the projector of the present embodiment, the camera shake sensor that detects the camera shake of the projector is provided, and the projected image is shifted on the display surface, thereby reducing the amount of movement of the projected image due to the camera shake. Therefore, a stable and easy-to-see projection image can be formed even from an unstable posture such as holding the projector by hand.

  Although the projectors of the first to fifth embodiments have been described in detail above, it is preferable to adjust the sensitivity of the hand movement sensor according to the projection situation such as the projection distance.

  In the first to fifth embodiments, the projector for projecting and displaying the projected image displayed on the display surface based on the image signal has been described. However, the projected image is not necessarily based on the image signal. There is no need to display, and the inventions of the first to fourth embodiments can be applied to a slide projector that projects and displays a transparent sheet on which a projection image is formed in advance on a projection surface.

  Furthermore, in the projector according to the present invention, it is not always necessary to display the projection image on the display surface, and the projection image may even be formed in a form that can be projected and displayed as a projection image on the projection surface. It ’s fine.

[Sixth Embodiment]
FIG. 11 shows a state in which the projector 100 of the present embodiment is installed on the base surface 43 and displays a projected image on the base surface 43, and FIG. 12 shows the base surface 43 while the projector 100 of the present embodiment is held by hand. The state where the projected image is projected is shown.

  In FIG. 11, the projector 100 according to the present embodiment includes a main body 44 having any of the functions of the projectors according to the first to fifth embodiments and a detachable fixing member 19. The projector 100 according to this embodiment is placed on the base surface 43 via a detachable fixing member 19. In order to stably place the projector 100, the position and area of the placement surface 45 are adjusted.

  In FIG. 12, the projector 100 according to the present embodiment has a removable fixing member 19 removed, and is held by the hand 20 to project a projection image onto the table surface 43. Since the main body has a camera shake correction function, even if camera shake occurs, the projected image moves little and the projected image is easy to observe.

  In the projector 100 according to the present embodiment, the detachable fixing member 19 is detachable from the main body 44, so that the projection surface can be placed at a favorite place in either the installed state or the hand held state. You can freely select and project an image.

  Although the projectors according to the first to sixth embodiments have been described in detail above, these projectors are shakes other than camera shakes when they are held by hand, for example, projections caused by shakes when projecting by being placed on a swinging table surface. Needless to say, the movement of the image can be reduced.

[Seventh Embodiment]
FIG. 13 is a schematic diagram showing the projector 100 according to the present embodiment, and shows a state in which the projector is projected while being held with the left hand.

  In FIG. 13, a projector 100 according to the present embodiment is a projector having any of the functions of the projectors according to the first to fifth embodiments, and in order to stably hold the projector 100, A concavo-convex grip surface 25 in which a finger can be stably received is formed around.

  The projector 100 according to the present embodiment is provided with the concavo-convex grip surface 25 and can be stably held by hand, so that there is little camera shake when held. Therefore, by combining with the camera shake prevention function of the projector according to the first to fifth embodiments, the amount of movement of the projected image due to camera shake can be further reduced. Moreover, since it is easy to hold by hand, it is excellent in portability.

[Eighth Embodiment]
FIG. 14 is a schematic diagram showing the projector 100 according to the present embodiment, and shows a state where the projector 100 is held and projected with the left hand.

  In FIG. 14, the projector 100 of the present embodiment includes a main body 44 having any of the functions of the projectors of the first to fifth embodiments, and a grip 24 fixed to the main body.

  The size and shape of the grip 24 of the projector 100 of the present embodiment are adjusted so that the grip 24 can be easily and stably gripped by hand. An uneven grip surface may be formed on the surface of the grip 24.

  Since the projector 100 of the present embodiment is provided with a dedicated grip 24 in addition to the same effects as the projector of the seventh embodiment, it is stably held when the main body 44 is too thick and difficult to hold by hand. Therefore, it is suitable.

1 is a block diagram showing an outline of a projector according to first to third embodiments. FIG. The block diagram of the outline | summary of the projector of 4th Embodiment is shown. The block diagram of the outline | summary of the projector of 5th Embodiment is shown. 1 is a schematic perspective view of a projector according to a first embodiment. The principle by which the projector according to the first embodiment corrects camera shake of a projected image is shown. 2 shows an optical system of a projector according to a second embodiment. The principle by which the projector of the second embodiment corrects camera shake of a projected image will be described. The principle by which the projector according to the third embodiment corrects camera shake of a projected image will be described. The principle by which the projector according to the fourth embodiment corrects camera shake of a projected image will be described. The principle by which the projector according to the fifth embodiment corrects camera shake of a projected image will be described. A state in which the projector according to the sixth embodiment is mounted on a table surface with a fixing member and a projection image is projected on the table surface with a detachable fixing member fixed. The projector of 6th Embodiment shows a mode that it mounts on the base surface with the fixing member in the state which the detachable fixing member was fixed, and is projecting a projection image on the base surface. A mode that a projection image is projected, holding the projector of a 7th embodiment with a left hand is shown. A mode that a projection image is projected, holding the projector of an 8th embodiment with a left hand is shown. The state of the movement of the projection image 41 on the display surface 42 of the liquid crystal display element 12 which the projector of 5th Embodiment comprises is shown.

Explanation of symbols

1 X-axis direction angular velocity sensor 2 Y-axis direction angular velocity sensor 3 X-axis direction output processing circuit 4 Y-axis direction output processing circuit 5 Y-axis direction image stabilization control circuit 6 X-axis direction image stabilization control circuit 7 Y-axis direction drive amplifier 8 X Axial direction drive amplifier 9 Y-axis direction actuator 10 X-axis direction actuator 11 Projection optical system 12 Liquid crystal display element 13 LED light source 14 Display circuit 15 Illumination circuit 16 Display position moving function display circuit 17 Light beam 18 before camera shake After camera shake and after correction Light beam 19 Removable fixing member 20 Hand 21 Projection light 22 Projection optical system exit part 24 Grip 25 Uneven grip surface 26 Optical path correction lens 28 First reflector 29 Second reflector 30 Projection surface 31 Before camera shake Optical axis of the optical path correction lens 26 (central beam before camera shake)
32 Optical axis of the optical path correction lens 26 after camera shake and before correction (central beam after camera shake and before correction)
33 Corrected center light beam 34 Predetermined movement amount 35 Optical axis 36 of optical path correction lens 26 after correction Light beam 37 First reflection surface 38 Second reflection surface 39 Projection lens 40 Vari-angle prism 41 Projected image 42 Display surface 43 Base surface 44 Main body 45 Mounting surface 100 Projector of the present invention

Claims (10)

A projector comprising: a projection image forming unit that forms a projection image; and a projection optical system that displays the projection image by projecting the projection image onto a projection plane,
The projector includes a shake sensor for detecting the shake of the projector,
A projector comprising: a blur correction unit for reducing an amount of movement of the projection image on the projection plane caused by the blur of the projector based on a blur signal detected by the blur sensor.   The projector according to claim 1, wherein the blur correction unit reduces an amount of movement of the projection image on the projection plane by correcting an optical path of the projection optical system.   The projector according to claim 2, wherein the projection optical system includes an optical path correction lens in the optical path, and the optical path of the projection optical system is corrected by changing a position of the optical path correction lens.   The projection optical system includes a reflecting mirror having a reflecting surface in the optical path, and corrects the optical path of the projection optical system by changing a surface direction of the reflecting surface. projector.   The projection optical system has a variable apex angle prism in the optical path, and the optical path of the projection optical system is corrected by changing the optical path of the projection optical system by changing the apex angle of the variable apex angle prism. The projector according to claim 2.   The projected image forming unit includes a display surface for displaying and forming the projected image, and correcting the position where the projected image is displayed, thereby moving the projected image on the projected surface. The projector according to claim 1, wherein the amount of the projector is reduced.   The projector according to claim 6, wherein the position for displaying the projection image is corrected by moving the position of the display surface.   The projector according to claim 6, wherein the display position of the projection image is corrected by moving the display position of the projection image on the display surface.   The projector according to claim 1, further comprising a detachable fixing member.   The projector according to any one of claims 1 to 9, further comprising a grip portion at least partially gripped.

Images