KR101346035B1 - Device for displaying three dimensional image, mirror therefor and method for manufacturing mirror - Google Patents

Abstract

The present invention relates to a stereoscopic image display apparatus, a mirror, and a mirror manufacturing method, wherein a plurality of unit units are mounted on a circuit board using a plurality of light sources as unit units, and the front of the plurality of unit units is perpendicular to each other by adjacent light sources. A polarizing plate is formed, the light source unit for irradiating the polarization of the light source integrally to the lens installed on the front of the polarizing plate through the optical fiber, the micro-reflective switch unit for reflecting the polarization of the light source unit, and the plurality of incident through the micro-reflective switch unit It provides a mirror for receiving a polarization of the polarization, and reflects at different positions for each polarization to form a plurality of virtual images.

Description

DEVICE FOR DISPLAYING THREE DIMENSIONAL IMAGE, MIRROR THEREFOR AND METHOD FOR MANUFACTURING MIRROR}

The present invention relates to a stereoscopic image display, and more particularly, to a stereoscopic image display device and a mirror and a method of manufacturing a mirror that can improve the mass productivity of the assembly for implementing a stereoscopic image.

In general, three-dimensional images that represent three-dimensional image is made by the principle of stereo vision through two eyes. The parallax of two eyes, that is, binocular disparity that appears because two eyes are about 65mm apart, is the most important factor of three-dimensional effect. This can be called. In other words, the left and right eyes each see different two-dimensional images, and when these two images are delivered to the brain through the retina, the brain accurately fuses them with each other to reproduce the depth and reality of the original three-dimensional image.

Currently, technologies proposed for displaying 3D stereoscopic images include a stereoscopic image display by a special glasses, an autostereoscopic stereoscopic image display, and a holographic display method. The three-dimensional image display method using the special glasses is a polarized glasses method using the vibration direction or rotation direction of the polarized light, time-division glasses method alternately presented while switching the left and right images and a method of delivering light of different brightness in the left and right Phosphorus concentration difference can be divided. In addition, the autostereoscopic 3D display method has a parallax method and a semi-cylindrical lens arranged so that images can be separated and viewed through a vertical grid-shaped aperture in front of each image corresponding to the left and right eyes. It can be divided into a lenticular method using a lenticular plate and an integral photography method using a lens plate shaped like a fly's eye.

In addition, the holographic display method can obtain a three-dimensional stereoscopic image having all factors such as focus adjustment, confinement angle, binocular disparity, and motion parallax that cause three-dimensional effect. Are classified.

The three-dimensional image display method by the special glasses, many people can enjoy the three-dimensional image, but has the disadvantage that you must wear a separate polarized glasses or liquid crystal shutter glasses. That is, the observer must wear special glasses to cause inconvenience and unnaturalness.

The autostereoscopic 3D display method has a fixed observation range and is limited to a small number of people, but has a feature of not wearing a separate eyeglass.

Thus, there is an increasing tendency to adopt a parallax-barrier, which is a method of realizing a three-dimensional image virtually through deception using stereo images.

The parallax-barrier has a vertical or horizontal shape (slit) in front of the image corresponding to the left and right eyes, and separates and observes the three-dimensional image synthesized through the slit to feel a three-dimensional effect. to be.

Here, the three-dimensional image display apparatus by the parallax barrier method will be described briefly as follows.

1 is a view showing a barrier type 3D display device according to the prior art.

As shown in FIG. 1, the conventional parallax barrier system includes an image panel 3 and a barrier panel 1, and the barrier panel 1 blocks slit through which light passes and blocks the light. The barriers are arranged in front of the image panel 3 in a structure arranged repeatedly.

The observer sees an image generated by the image panel 3 through the slit of the barrier panel 1, and the left and right eyes of the observer see different regions of the image panel 3 even though the same slit. The parallax barrier method uses this principle, so that the left eye and the right eye view images corresponding to pixels in different areas through the slit, so that a 3D feeling can be felt.

That is, in FIG. 1, the left eye LE views the left eye corresponding pixel L on the image panel 3, and the right eye RE views the right eye corresponding pixel R on the image panel 3.

As such, commercially available three-dimensional image expression methods adopt a method of making a sense of distance by showing different images in the left and right of a person. Since this method shows different images in the left and right eyes, the position where the left and right eyes are in focus and the position where the actual image appears to be located are not at the same place, which causes eye fatigue and dizziness. In addition, in the case of eyeglasses also causes the inconvenience that a person must wear separate glasses.

On the other hand, the applicant has already patented the autostereoscopic stereoscopic image display through Korean Patent Registration No. 10-1068348 (Registration date: September 21, 2011, name: stereoscopic image display device), the present invention is such a stereoscopic It is proposed to further improve the mass productivity of a video display.

The present invention is to provide a three-dimensional image display device and a mirror and a method for manufacturing a mirror that can be viewed without wearing a three-dimensional glasses, does not cause fatigue or dizziness, and can improve the mass production of the display.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems.

In the display device of the present invention for achieving the above object, a plurality of unit units are mounted on a circuit board using a plurality of light sources as a unit unit, a polarizing plate perpendicular to each other for each adjacent light source is formed on the front of the plurality of unit units A light source unit which integrally irradiates the polarization of the light source with a lens installed in front of the polarizing plate through an optical fiber; A micro reflection switch unit reflecting the polarization of the light source unit; And a mirror configured to receive a plurality of polarizations incident through the micro-reflective switch unit and reflect the polarizations at different positions for each polarization to form a plurality of virtual images.

The light source unit and the mirror may be formed to have the same radius of curvature, and the micro-reflective switch unit may be positioned at the center of the radius of curvature of the light source unit.

The light source unit includes a circuit board in which a plurality of unit units are mounted in a matrix using two pairs of light sources as unit units; A polarizing plate disposed in front of the light source to transmit polarized light perpendicular to each other between the pair of light sources; An optical fiber support disposed on an upper surface of the polarizing plate and having a concave surface having a predetermined radius of curvature at an opposite surface contacting the polarizing plate to guide light transmitted through the polarizing plate through an optical fiber; And a light source lens unit having a predetermined radius of curvature so as to be disposed on the concave surface of the optical fiber support, and formed with lenses corresponding to the unit of the light source such that the light induced from the optical fiber is diffused.

The light source lens unit includes a lens support having a predetermined radius of curvature on the upper and lower surfaces thereof so as to be disposed on the concave surface of the optical fiber support, wherein hollow blocks are formed for each unit of the light source; And a lens array disposed on an upper surface of the lens support, in which lenses corresponding to the unit of the light source are integrally formed in a matrix.

The unit unit of the light source unit may include two pairs of light sources, the micro-reflective switch unit may include a plurality of light sources, and the polarized light emitted from the pair of light sources may be irradiated to the micro-reflective switch units, respectively.

The mirror may be configured such that a plurality of lenses having different radii of curvature correspond to the unit units of the light source, and the plurality of lenses may be integrally formed to have a predetermined radius of curvature.

The mirror may include a first lens plate having one side formed in a plane and the other side opposite to the one side having a plurality of convex lenses formed in a matrix; A reflective polarizer formed on a planar portion of the first lens plate; A second lens plate having a plane that is in contact with the planar portion of the first lens plate, and the other side opposite to the plane includes a plurality of convex lenses formed in a matrix; And a reflective layer formed on the convex lens surface to reflect the light source passing through the reflective polarizing plate in the second lens plate.

The mirror may be arranged in a matrix such that unit units composed of a plurality of lenses correspond to the unit units of the light source, and the unit units arranged in the matrix may have a predetermined radius of curvature.

According to one aspect of the present invention, there is provided a display mirror including: a first lens plate having one side formed in a flat surface and the other side facing the one side formed with a plurality of convex lenses in a matrix; A reflective polarizer formed on a planar portion of the first lens plate; A second lens plate having a plane that is in contact with the planar portion of the first lens plate, and the other side opposite to the plane includes a plurality of convex lenses formed in a matrix; And a reflective layer formed on the convex lens surface to reflect the light source passing through the reflective polarizing plate in the second lens plate.

Each lens of the first lens plate and the second lens plate may be a planar-convex lens.

According to one aspect of the present invention, there is provided a method of manufacturing a mirror for a display, the method including: manufacturing a first lens plate on which one side is a plane and the other side opposite to one side is arranged with a convex lens in a matrix using transparent resin; Manufacturing a second lens plate on which one side is a plane and the other side opposite to one side is arranged with a convex lens in a matrix using transparent resin; Forming a reflective polarizing layer by coating a reflective polarizer on the plane side of the first lens plate or by using a nano-imprint lithography method using a wire-grid polarizer; Forming a reflective layer by coating a reflective material on the lens surface of the second lens plate; And bonding the planes of the first lens plate and the second lens plate to be in contact with each other.

After bonding the first lens plate and the second lens plate, in order to process the bonded lens plate to have a predetermined radius of curvature, cutting between the lenses so that the width becomes wider from the center to the edge along one axis of the lens plate step; And pressing the cut lens plate to have a predetermined radius of curvature.

As described above, the present invention comprises a unit unit constituting the light source unit with at least four light sources, polarized by providing a polarizing plate at the front end of each light source, and then reflecting each polarized light to a mirror having a different curvature radius. The stereoscopic image can be displayed by showing two images of different image distances to the eye.

In addition, the stereoscopic image display apparatus according to the present invention may display a stereoscopic image without additional glasses, and may not cause dizziness.

In addition, the stereoscopic image display apparatus according to the present invention can display a larger number of pixels by displaying a pixel corresponding to the product of the number of unit units of the light source unit and the number of micromirrors of the microreflection switch unit. In addition, the stereoscopic image display apparatus according to the present invention can represent a stereoscopic image at a distance from the front of the human eye to almost infinity.

1 is a view showing a barrier type 3D display device according to the prior art.
2 is a conceptual diagram illustrating a stereoscopic image display apparatus according to the present invention.
3 illustrates that an image is formed on a virtual screen of the stereoscopic image display apparatus according to the present invention.
4 is a view showing a light source unit according to an embodiment of the present invention.
5 is a plan view illustrating a circuit board on which a light source is mounted in the light source unit of FIG. 4.
FIG. 6 is a view for explaining polarization of a unit unit in the light source unit of FIG. 4.
7 to 10 show the driving sequence of the micro-reflective switch unit according to the embodiment of the present invention.
11 is a view showing a mirror according to an embodiment of the present invention.
12 to 14 are views for explaining the manufacturing process of the mirror according to an embodiment of the present invention.
15 illustrates a relationship between an eye and an image of a human in a stereoscopic image display according to the present invention.
16 illustrates a configuration of a controller for driving a stereoscopic image display according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

2 is a conceptual diagram illustrating a stereoscopic image display apparatus according to the present invention. 3 is a view showing an image formed on a virtual screen of the stereoscopic image display apparatus according to the present invention.

2 and 3, the display apparatus 10 according to an exemplary embodiment of the present invention includes a light source unit 100, a micro reflective switch unit 200, and a mirror 300.

The image image irradiated from the light source unit 100 is reflected through the micro-reflective switch unit 200, and reaches the human eyes LE and RE through the mirror 300, thereby being located at the rear of the mirror 300. Make the image appear on the screen. At this time, the image image reflected through the mirror 300 is such that the image having two different image distance reaches the human eyes (LE, RE), so that the human eyes (LE, RE) to recognize as a three-dimensional image do. That is, the plurality of light sources 110 of the light source unit 100 are turned on at the same time by different color, different brightness, and combination of different polarizations, and are collected in the micro-reflective switch unit 200 (Digital Micro-mirror Device). When the micro-reflective switch unit 200 is turned on one by one, the image is generated on two virtual screens as many as the number of light sources 110 in the air, and when the micro-reflective switch unit 200 is turned on to fill the entire virtual screen. do.

Hereinafter, a more detailed configuration and operation of the stereoscopic image display apparatus according to an embodiment of the present invention will be described in detail.

4 is an exploded perspective view illustrating a light source unit of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

The light source unit 100 emits an image image according to an image signal received from a predetermined controller. The light source unit 100 may include, for example, a light source 110, a polarizer 120, an optical fiber support 130, and a light source lens unit 140.

The light source 110 is, for example, a light emitting diode, and a plurality of unit units 110_11 to 110_ab may be arranged in a matrix on the circuit board 101 as shown in FIG. 5. The light source 110 may be mounted on the circuit board 101 by surface mounting technology (SMT). The light source 110 has a configuration in which a plurality of unit units 110_11 to 110_ab are arranged in a row and b column. The unit units 110_11 to 110_ab of the light source 110 may be formed of a ㅧ b (for example, 5000). On the front surface of the light source 110 is a polarizing plate 120 that is perpendicular to each other between the light sources (for example, 110-1 and 110-2, 110-3 and 110-4) adjacent to each light source 110 of the unit unit Is located. That is, the light irradiated from the pair of light sources 110-1 and 110-2, 110-3, and 110-4 from the unit unit 110-11 is polarized into vertical components through the polarizer 120, respectively. .

In addition, an optical fiber support 130 having a concave surface having a flat bottom surface and a predetermined radius of curvature is disposed on the front surface of the polarizing plate 120. In the optical fiber support 130, through holes 133 and 135 having a 'reverse Y' shape are formed vertically between the bottom surface and the top surface, and the optical fiber 131 is inserted into the through holes 133 and 135. . The through holes 133 formed on the lower surface of the optical fiber support 130 correspond to the respective light sources 110, and the plurality of through holes 133 are connected at the central portion of the optical fiber support 130 to provide one through hole 135. ) Extends to the top surface of the optical fiber support 130. Here, each of the optical fibers 131 inserted into the plurality of through holes 133 induces a pair of polarized polarizations through the polarizer 120, and has one through hole connected to the plurality of through holes 133. 135 synthesizes a plurality of incident polarizations and guides them forward. Here, the radius of curvature of the optical fiber support 130 may be, for example, 1m, the larger the radius of curvature, the larger the size of the screen can be appropriately set as needed. Each through hole 133 formed on the upper surface of the optical fiber support 130 is formed to face the micro-reflective switch unit 200 located at the center of curvature of the optical fiber support 130.

The light source lens unit 140 includes a lens support 141 and a lens array 145. The lens support 141 is formed to have a predetermined radius of curvature so that the upper and lower surfaces thereof are disposed on the concave surface of the optical fiber support 130. The hollow block 142 corresponding to the unit unit 110-11 of the light source 110 is formed. The lens array 145 is formed with a predetermined radius of curvature so as to be disposed on the top surface of the lens support 141, and is diffused so that the light derived from the optical fiber 131 is diffused through the hollow block 142 of the lens support 141. A plate 144 (Diffuser) is formed. In the lens array 145, a plurality of convex lenses 145-1 are arranged in a matrix form, and a diffusion plate 144 is disposed on a plane side, which is a lower surface of the lens array 145.

Hereinafter, the unit units 110_11 positioned in one row and one column of the light source 110 will be described.

The unit unit 110-11 of the light source 110 includes four light sources 110-1 to 110-4 positioned on the circuit board 101. The light sources 110-1 to 110-4 are fixed and soldered by inserting lead pins into the grooves formed in the circuit board 101 by the SMT method. In this case, a circuit pattern connected to the lead wires of the respective light sources 110 may be formed in the circuit board 101 in advance.

The light sources 110-1 to 110-4 are paired with each other and arranged on the circuit board 101. In addition, the polarizers 120 that are perpendicular to each other between adjacent light sources are positioned in front of the light source 110. That is, the light emitted from the pair of light sources 110-1 and 110-2, 110-3, and 110-4 is polarized into vertical components through the polarizer 120, respectively. In addition, the light sources 110-1 to 110-4 polarized through the polarizing plate 120 may be synthesized through the optical fibers 131 inserted into the corresponding through holes 133 and 135 of the optical fiber support 130 and proceed forward.

In addition, a light source lens unit 140 such as a convex lens is further formed at the upper end of the optical fiber support 130, so that the image components from each of the pairs 110-1 and 110-2, 110-3 and 110-4 are illustrated. As in 6, it can be applied to each of the micro-reflective switch unit 200 (210, 220) in approximately parallel.

The minute reflection switch unit 200 (DMD) is formed on the front surface of the light source unit 100. The micro-reflective switch unit 200 is located at an approximately curvature radius center of the light source unit 100. In addition, the micro-reflective switch unit 200 is composed of a pair of first and second micro-reflective switch unit (210, 220). The microreflection switch unit 200 reflects the image image incident from the light source unit 100 and applies it to the mirror 300. In addition, the first micro-reflective switch unit 210 and the second micro-reflective switch unit 220 may have a space of about 6.5 cm so as to correspond to the space between the human eyes LE and RE, as shown in FIG. 3. Accordingly, the images reflected from the first and second microreflective switch units 210 and 220 are applied to the respective eyes LE and RE of the human eyes LE and RE after being reflected by the mirror 300. . Accordingly, the images passing through the mirror 300 from the first and second microreflective switch units 210 and 220 are applied to each of the human eyes LE and RE to display a stereoscopic image.

Hereinafter, the driving of the microreflective switch unit 200 will be described with reference to FIGS. 7 to 10.

7 to 10, a driving sequence of the first micro reflection switch unit 210 among the micro reflection switch unit 200 is illustrated. Of course, the second micro-reflective switch unit 220 is configured and operated in the same manner as the first micro-reflective switch unit 210.

The first microreflective switch unit 210 includes a plurality of micro mirrors 210_11 to 210_cd. The micromirrors 210_11 to 210_cd are arranged as c rows and d columns. That is, the micro mirrors 210_11 to 210_cd have a number of c × d pieces (for example, 512 pieces).

The micromirrors 210_11 to 210_cd may rotate to have an angle of approximately ± 12 °. Accordingly, each of the micro mirrors 210_11 to 210_cd performs a turn on or turn off operation. In FIGS. 7 to 10, the turned-on ones of the micromirrors 210_11 to 210_cd are displayed in black and the turned-off ones are displayed in white.

The micro-reflective switch unit 200 is usually determined by the manufacturer in the driving method. For example, as shown in FIG. 7, odd rows 210_11, 210_31, 210_51, etc. are first turned on sequentially in the first column, and as shown in FIG. 8, even rows 210_21, 210_41, 210_61, etc.) are sequentially turned on. Thereafter, as shown in FIG. 9, odd rows 210_12, 210_22, 210_32, and the like are sequentially turned on in the next two columns, and even rows 210_22, 210_42, 210_62, etc., in two columns are sequentially turned on, as shown in FIG. 10. When turned on, the micromirrors 210_11 to 210_cd of the entire c rows and d columns are turned on.

In addition, in synchronization with the turn-on operation of the micromirrors 210_11 to 210_cd, the light source unit 100 also converts an image.

That is, the image of the light source unit 100 is reflected by the micro mirrors 210_11 to 210_cd and reflected by the mirror 300 to be displayed. Accordingly, the number of pixels of the display apparatus 10 according to an exemplary embodiment of the present invention is a × b which is the number of the unit units 110_11 to 110_ab of the light source unit 100, and the minute mirror 210_11 of the microreflection switch unit 200. C × d, which is the number of? 210_cd). For example, when the number of the unit units 110_11 to 110_ab of the light source unit 100 is 5000 and the number of the micromirrors 210_11 to 210_cd of the microreflective switch unit 200 is 512, the display apparatus 10 The number of pixels that can be represented is 256 million. Thus, it is possible to display the corresponding number of pixels without actually having 256 million pixels.

In addition, when the micro mirrors 210_11 to 210_cd all perform the turn-on operation once, the image reflected from the mirror 300 constitutes one frame. Therefore, if this operation is repeated 60 times per second, an image can be produced.

Meanwhile, the mirror 300 is formed at the lower end of the light source unit 100. The mirror 300 receives a plurality of polarizations incident through the microreflective switch unit 200 and reflects the polarizations at different positions for each polarization to form a plurality of virtual images. The mirror 300 has the same radius of curvature as the light source unit 100 and is positioned with the micro-reflective switch unit 200 as the center of curvature radius. The mirror 300 reflects the image irradiated from the micro-reflective switch unit 200 and applies it to the human eye.

11 is a view showing a mirror according to an embodiment of the present invention. Referring to FIG. 11, the mirror 300 includes a first lens plate 310, a reflective polarizer 315, a second lens plate 320, and a reflective layer 325. The unit of the mirror 300 includes a first lens 311, a reflective polarizer 315, a second lens 321, and a reflective layer 325.

One side of the first lens plate 310 is formed in a plane, and the other side opposite to one side is formed with a convex lens 311 in a matrix. The reflective polarizer 315 is formed in the planar portion of the first lens plate 310 to reflect any one of the plurality of incident polarized light and transmit the other. The second lens plate 320 has a plane that is in contact with the plane portion of the first lens plate 310, and the convex lens 321 is formed in a matrix on the other side opposite to the plane. The reflective layer 325 is formed on the convex surface of the second lens plate 320 to reflect the light source 110 transmitted through the reflective polarizer 315. That is, the mirror 300 is one of a plurality of incident polarized light is reflected by the reflective polarizer 315, the other is reflected by the reflective layer 325, the plurality of incident polarized light is a virtual of different distances It will form an image.

The mirror 300 is arranged in a matrix such that a unit unit composed of a plurality of lenses 311 and 321 corresponds to the unit unit 110-11 of the light source 110, and the mirror 300 has the same curvature as that of the light source unit 100. It is formed with a radius. That is, the unit unit of the mirror 300 is composed of a unit unit having a number one-to-one corresponding to the unit units (110_11 to 110_ab) of the light source unit 100. The mirror 300 reflects the image irradiated from the microreflective switch unit 200, and thus a virtual screen is formed behind the mirror 300.

The first lens 311 and the second lens 321 are planar-convex lenses, and the convex surface of the first lens 311 and the convex surface of the second lens 321 have a radius of curvature. It is different.

12 to 14 are views illustrating a manufacturing process of a mirror according to an embodiment of the present invention, with reference to the accompanying drawings.

First, one side is a plane, and the other side opposite to one side is manufactured by using a transparent resin, the first lens plate 310 in which the lens units 311 made of convex surfaces are arranged in a matrix. In this case, the first lens plate 310 may be manufactured through a compression molding using pressure and heat or a high precision molding (HPM) process developed by a German company (Fresnel Optics, Inc.). .

In addition, the second lens plate 320 to be combined with the first lens plate 310 is made of transparent resin through compression molding or high precision molding, and the second lens plate 320 is the first lens plate 310. Likewise, one side is a plane, and the other side opposite to the one side is provided with lens units 321 formed of convex surfaces in a matrix. Here, the curvature radius of the convex surface of the first lens plate 310 and the convex surface of the second lens plate 320 are different, and the curvature radius of the first lens plate 310 is the curvature of the second lens plate 320. Larger than the radius.

In the present invention, the first lens plate 310, the second lens plate 320 and other lenses 145 are made of a transparent resin, the transparent resin is an acrylic resin (PMMA; Poly Methyl Metacrylate) or 150 ℃ It may be a resin such as cyclo-olefins that maintains their operation and optical properties even at high temperatures. In general, since plastics change polarization due to birefringence, unlike glass, only selected resins such as PMMA can be used. Among these, cyclo-olefins are most suitable because of their high material cost but high temperature properties.

Subsequently, in order to form the reflective polarizer 315 on the planar side of the first lens plate 310, a multi-layer reflective polarizer is coated on the planar side of the first lens plate 310 or a wire grid. A polarizer (wire-grid polarizer) is formed by using nano imprint lithography. Here, nanoimprint lithography is a technique for forming a nanoscale ultrafine pattern, and after applying a polarizing material on a substrate, a pattern having a nanoscale structure may be thermally pressed to form a pattern.

In addition, the reflective layer 325 is formed by coating a reflective material on the convex surface side of the second lens plate 320.

The planes of the first lens plate 310 and the second lens plate 320 are bonded to each other by using an optical bonding method. The optical bonding method is a method in which the first lens plate 310 and the second lens plate 320 are bonded with an optical glue and then cured with ultraviolet (UV).

After bonding the first lens plate 310 and the second lens plate 320, the bonded mirror 300 is centered along one axis of the mirror 300 as shown in FIG. 13 to process the mirror 300 to have a predetermined radius of curvature. In the cutting (dotted line) between the lens unit 311 using a laser so that the width becomes wider toward the edge. Subsequently, the cut mirror 300 is pressed to have the same radius of curvature as the light source unit 100 to complete the manufacture of the mirror 300.

The mirror 300 manufactured as described above is bonded to the frame 350 as shown in FIG. 14 having the same radius of curvature to complete the manufacture and assembly of the mirror 300.

Referring to FIG. 11, an image incident from the microreflective switch unit 200 is first incident on a lens unit (eg, 311) of the mirror 300. And the image is composed of two components perpendicular to the polarizing plate 120 transmitted when starting from the light source 100 first. One of the components enters the first lens 311 along the path ① and is reflected along the path ② to the reflective polarizer 315 coated on the plane of the first lens 311. The other component passes through the reflective polarizer 315 of the first lens 311 along the path ③ to reach the second lens 321 and to the reflective layer 325 formed in the plane of the second lens 321. It is reflected along the path ④. That is, the components reflected by the reflective polarizer 315 are combined along the path ② and the components reflected by the reflective layer 325 along the path ④ and are applied to the human eyes LE and RE.

At this time, since the convex surfaces of the first lens 311 and the second lens 321 have different curvature radii, the components of the image are recognized as if they are at different object distances L1 and L2 as shown in FIG. 15. And, accordingly, the human eyes LE and RE perceive the image three-dimensionally. FIG. 15 illustrates a relationship between a human eye and an image in the display device according to an exemplary embodiment of the present invention.

In FIG. 15, the length of the eyeball is defined as l, the diameter of the pupil d, and the diameter of the eye cell t in the human eye LE. Further, it is assumed that one component of the image reaching the human eye through the foregoing configuration is located at the distance of the object distance L1 on the virtual screen, and the other component is located at L2. Then, the image passing through the human pupil is located at an image distance l1 and l2 from the pupil, respectively. At this time, if light of the same intensity is applied in L1 and L2, the human eye focuses on the middle L. Also, in this case, the light from L1 and L2 is slightly spread by the pupil focused on L as shown in FIG. 15 without forming an accurate image on the cell. The two images combine to control the pupil so that the circle of least confusion reaches the cell. Thus, by adjusting the intensity of the light coming from L1 and L2, the human eye can focus the image anywhere between L1 and L2, thereby feeling a sense of distance and three-dimensionality.

As discussed above, the unit units 110_11 to 110_ab of the light source unit 100 in the display apparatus 10 according to the exemplary embodiment of the present invention each have a pair of light sources 110-1 and 110-2 or 110-. 3 and 110-4 pass through the polarizing plate 120 which is perpendicular to each other, and thus are reflected by the reflective polarizing plate 315 and the reflective layer 325 of the mirror 300, respectively, and thus, different distances L1 and L2. It is shown to have. Accordingly, according to the discussion of FIG. 15, the human eyes LE and RE may sense a sense of distance and three-dimensionality in an image of the display apparatus 10 according to an exemplary embodiment of the present invention.

Also, in this case, if the human eye focuses on L, the following lens equation holds.

Equation 1

Where f is the focal length.

In addition, the light from L1 converges at the position of l1 through the human pupil, spreads slightly and is distributed to the cell having a diameter of t, and the following lens equation is established.

Equation 2

At this time, since the eye cell of the retina is not an ideal point, but has a diameter of t, the human eye can recognize it as an image without difficulty.

In addition, the light from L2 satisfies the following lens equation.

Equation 3

Then, when the focal length of the viewer's eyes is f, the sections L1-L2 in the image space in which the natural image can be viewed can be obtained by the following equation.

Equation 4

In addition, the diameter (t) of the eye cell (5) [mu] m, the size (d) of the pupil (4) [mm], the eye length (l) of 17.5 [mm] and the approximate values are as follows.

Equation 5

In the above formula, n is a natural number, and if a virtual screen can be created according to the distance, an image can naturally express an image from just before the human eyes (LE, RE) to almost infinity.

In the present invention, the light source 110 is driven by the controller of FIG.

Referring to FIG. 16, the controller 400 includes a multiplexer 410, shift registers 420 to 450, and D / A converters 460 and 470.

First, the multiplexer 410 separates serial data and applies it to the shift registers 420 to 450. The shift registers 420 to 450 are composed of two pairs, so that while the pair of registers (eg, 420 and 430) are being applied to the light source 110, the remaining pairs of registers 440 and 450 have no data. Time can be saved by performing a loading operation. Also, in each pair of registers (eg, 420, 430) one 420 is involved in the brightness of the image and the other 430 is involved in the distance of the image.

That is, the data applied to the light source 110 is formed by 2 bytes, 1 byte of which divides the brightness of the image into 256 levels, and the remaining 1 byte may divide the brightness into 256 again to give a sense of distance. In addition, the D / A converters 460 and 470 are provided in two, one is applied to the brightness applied to the light source 110 constituting each unit unit (110_11 to 110_ab) of the light source 110, the other is Applies to distribute light to two virtual screens at a given brightness.

What has been described above is only one embodiment for implementing the stereoscopic image display apparatus according to the present invention, and the present invention is not limited to the embodiment, and the scope of the present invention is departed from the scope of the following claims. Without this, any person having ordinary knowledge in the field of the present invention can make various changes.

10: stereoscopic image display 100: light source
101: circuit board 110: light source
110_11 to 110_ab: light source unit 120: polarizing plate
130: optical fiber support 131: optical fiber
133 and 135: through hole 140: light source lens portion
141: lens support 142: hollow block
144: diffuser plate 145: lens array
145-1: lens unit 200: micro reflection switch unit
210: first minute reflection switch unit 220: second minute reflection switch unit
210_11 to 210_cd: reflection mirror 300: mirror
310: first lens plate 311: first lens
315: reflective polarizer 320: second lens plate
321: second lens 325: reflective layer
400: control unit 410: multiplexer
420 to 450: shift registers 460 and 470: D / A converters
LE, RE: Left / Right

Claims (16)

A plurality of unit units are mounted on a circuit board using a plurality of light sources as unit units, and polarizing plates perpendicular to each other are formed in front of the plurality of unit units for each adjacent light source. A light source unit for irradiating the polarization of the light source integrally;
A micro reflection switch unit reflecting the polarization of the light source unit; And
And a plurality of mirrors for receiving a plurality of polarized light incident through the micro-reflective switch unit and reflecting the light from different positions for each polarized light to form a plurality of virtual images.
And the mirror is configured such that a plurality of lenses having different radii of curvature correspond to the unit units of the light source, and the plurality of lenses are integrally formed to have a predetermined radius of curvature.
The method according to claim 1,
And the light source unit and the mirror are formed to have the same radius of curvature, and the micro-reflective switch unit is positioned at the center of the radius of curvature of the light source unit.
The method according to claim 1,
The light source unit includes:
A circuit board having a plurality of unit units mounted in a matrix using two pairs of light sources as unit units; A polarizer disposed on a front surface of the light source to transmit polarized light perpendicular to each other between a pair of light sources; An optical fiber support disposed on an upper surface of the polarizing plate and having a concave surface having a predetermined radius of curvature at an opposite surface contacting the polarizing plate to guide light transmitted through the polarizing plate through an optical fiber; And a light source lens unit having a predetermined radius of curvature so as to be disposed on the concave surface of the optical fiber support, and formed with lenses corresponding to the unit of the light source such that light derived from the optical fiber is diffused.
The method according to claim 3,
The light source lens unit,
A lens support having a predetermined radius of curvature so as to be disposed on the concave surface of the optical fiber support, the hollow support having a hollow block for each unit of the light source; And a lens array disposed on an upper surface of the lens support, in which lenses corresponding to the unit of the light source are integrally formed in a matrix.
The method according to claim 1,
The unit unit of the light source unit is composed of two pairs of light sources, the micro-reflective switch unit is composed of a plurality, the three-dimensional image display device is irradiated with the polarized light irradiated from the pair of light sources, respectively.
delete The method according to claim 1,
The mirror is,
A first lens plate having one side formed in a plane and the other side facing the one side having a plurality of convex lenses formed in a matrix; A reflective polarizer formed on a planar portion of the first lens plate; A second lens plate having a plane that is in contact with the planar portion of the first lens plate, and the other side opposite to the plane includes a plurality of convex lenses formed in a matrix; And a reflective layer formed on the convex lens surface to reflect the light source passing through the reflective polarizing plate in the second lens plate.
The method according to claim 1,
The mirror is a three-dimensional image display device is arranged in a matrix so that the unit unit consisting of a plurality of lenses corresponding to the unit unit of the light source, the unit units arranged in the matrix is formed with a predetermined radius of curvature.
A first lens plate having one side formed in a plane and the other side facing the one side having a plurality of convex lenses formed in a matrix;
A reflective polarizer formed on a planar portion of the first lens plate;
A second lens plate having a plane that is in contact with the planar portion of the first lens plate, and the other side opposite to the plane includes a plurality of convex lenses formed in a matrix; And
And a reflective layer formed on the convex lens surface to reflect the light source passing through the reflective polarizing plate in the second lens plate.
The method of claim 9,
And each lens of the first lens plate and the second lens plate is a planar-convex lens.
The method of claim 9,
3. The mirror of claim 1, wherein the lenses of the first and second lens plates have different curvature radii.
The method of claim 9,
One polarization of the plurality of incident polarizations is reflected by the reflective polarizing plate, and the other polarization is reflected by the reflective layer, so that the plurality of incident polarizations form a virtual image of different distances. Dragon mirror.
Manufacturing a first lens plate on which one side is a plane and the other side opposite to one side is arranged with a convex lens in a matrix using transparent resin;
Manufacturing a second lens plate on which one side is a plane and the other side opposite to one side is arranged with a convex lens in a matrix using transparent resin;
Forming a reflective polarizing layer by coating a reflective polarizer on the plane side of the first lens plate or by using a nano-imprint lithography method using a wire-grid polarizer;
Forming a reflective layer by coating a reflective material on the lens surface of the second lens plate; And
And bonding the planes of the first lens plate and the second lens plate to abut each other.
The method according to claim 13,
The lens of the first lens plate and the lens of the second lens plate has a radius of curvature is formed different from the mirror for a stereoscopic image display.
The method according to claim 13,
After bonding the first lens plate and the second lens plate,
Cutting between the lenses such that the bonded lens plate has a predetermined radius of curvature so that the width of the bonded lens plate becomes wider from the center to the edge along one axis of the lens plate; And pressing the cut lens plate to have a predetermined radius of curvature, and manufacturing the mirror for a stereoscopic image display.
16. The method of claim 15,
Method of manufacturing a mirror for a stereoscopic image display comprising the step of completing the manufacturing of the mirror by bonding the lens plate produced in the above to the frame having the same radius of curvature.

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