CN204102903U - A kind of dot structure and display unit thereof - Google Patents
A kind of dot structure and display unit thereof Download PDFInfo
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- CN204102903U CN204102903U CN201420574584.9U CN201420574584U CN204102903U CN 204102903 U CN204102903 U CN 204102903U CN 201420574584 U CN201420574584 U CN 201420574584U CN 204102903 U CN204102903 U CN 204102903U
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Abstract
The utility model belongs to Display Technique field, is specifically related to a kind of dot structure and display unit thereof.This dot structure, comprise staggered first pixel cell and the second pixel cell successively, described first pixel cell comprises the first sub-pixel in slant arrangements and the second sub-pixel, second pixel cell comprises the 3rd sub-pixel in slant arrangements and the 4th sub-pixel, and described first sub-pixel has different base color from described 3rd sub-pixel, described second sub-pixel has identical base color with described 4th sub-pixel.This dot structure, realizing high-resolution while, can improve again the aperture opening ratio of sub-pixel, not only simplify preparation technology, the luminance level obtained, and extends the life-span of product; And by the setting to the weighted value of the base color of himself disappearance in procedure for displaying, avoid the phenomenon of colour edging error and uneven color, thus realize better display effect.
Description
Technical Field
The utility model belongs to the technical field of show, concretely relates to pixel structure and display device thereof.
Background
In the related art flat panel display device, a color display panel displays an image by pixel units. In general, a pixel unit includes three sub-pixels with different colors, namely, red (R), green (G), and blue (B), and the color and brightness displayed by the pixel point (each pixel point corresponds to one pixel unit) can be controlled by controlling the three color components of the RGB sub-pixels corresponding to the three sub-pixels in a certain pixel unit.
Fig. 1A-1C are schematic structural diagrams of RGB sub-pixel arrangement in a pixel unit in the prior art, which include three ways, i.e., stripe arrangement (see fig. 1A), delta arrangement (see fig. 1B), and mosaic arrangement (see fig. 1C). In fig. 1A, the RGB sub-pixels are sequentially arranged in rows, and the RGB sub-pixels are respectively arranged in columns, and because the arrangement mode has only one color in the vertical line direction, the phenomenon of non-uniform color is easily generated, color edge errors are generated, and the display effect is affected; the two arrangements of fig. 1B and 1C also have the problem of color non-uniformity in some directions and low resolution.
In practical applications, the resolution of the display device can be increased by increasing the number of Pixels Per Inch (Pixels Per inc, abbreviated as PPI) of the display device. In order to improve the PPI, it is necessary to reduce the area of the pixels and the space between the pixels as much as possible; correspondingly, when one pixel is formed by the sub-pixels, when one display device needs a larger number of pixels to realize high-resolution display, the number of the required sub-pixels is also larger, and along with the continuous refinement of the process, the improvement of the process can also reach the limit.
In summary, the following technical problems are generally encountered in the display device of the related art:
1) the actual display resolution of the display device is the same as the physical resolution of the display device. In order to obtain a higher display resolution, it is necessary to increase the physical resolution of the display device by increasing the number of sub-pixels. As mentioned above, since there is a limit to the improvement of the process, it is difficult to improve the resolution again when the number of sub-pixels is increased to a certain number;
2) the display device has the advantages that the number of the sub-pixels is large, so that the number of the data lines is large, the power consumption of the display device is improved, and the aperture opening ratio of the display device is reduced. For example: at higher resolution, the aperture ratio of the sub-pixel (in the field, the aperture ratio generally refers to the ratio between the area of the light-emitting area of the pixel region and the area of the pixel unit which can be repeated in the display region; the higher the aperture ratio, the lower the luminance required by the light-emitting area of each pixel, and the lower the current density of the luminance of the light-emitting area) is difficult to ensure, thereby affecting the life, brightness and other characteristics of the product;
3) the display device has a large number of sub-pixels and a small area of each sub-pixel, so that the manufacturing process of the display device is difficult and the cost is high. For example: taking an Organic Light emitting Display device (OLED for short) as an example, in the prior art of fabricating a top Emission Active Matrix Organic Light Emitting Diode (AMOLED) panel, when a high-precision Metal Mask (FMM for short) is used to evaporate and plate pixels arranged side by side, since a common high-precision Metal Mask has a limitation of a minimum opening, sub-pixels of different colors have a limitation of an inter-opening distance in an evaporation process, the limitation of an opening area of the high-precision Metal Mask and an accuracy of the evaporation process is inevitable, and thus it is difficult to realize a high-resolution Display device.
Therefore, how to realize the preparation process of the high-resolution pixel, and while realizing the high resolution, the aperture opening ratio of the sub-pixel can be improved, a good brightness level can be obtained, and the service life of the product can be prolonged is a technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a pixel structure and a display device thereof, wherein the pixel structure can improve the aperture opening ratio of the sub-pixels while realizing high resolution, thereby simplifying the manufacturing process, obtaining good brightness level, and prolonging the service life of the product; and through the setting of the weighted value of the basic color which is lost in the display process, the phenomena of color edge errors and uneven colors are avoided, and a better display effect is realized.
The technical scheme who solves the utility model discloses technical problem adopts is this pixel structure, including staggered arrangement's first pixel unit and second pixel unit in proper order, first pixel unit is including being the first sub-pixel and the second sub-pixel of slash range, and second pixel unit is including being the third sub-pixel and the fourth sub-pixel of slash range, just first sub-pixel with third sub-pixel has different basic colours, the second sub-pixel with fourth sub-pixel has the same basic colour.
Preferably, the first pixel units and the second pixel units are alternately arranged in a row direction and a column direction, and in the pixel units in adjacent rows, the first pixel units and the second pixel units are arranged in the row direction and shifted by one pixel unit, and in the pixel units in adjacent columns, the first pixel units and the second pixel units are arranged in the column direction and shifted by one pixel unit, wherein the pixel units include the first pixel units or the second pixel units.
Preferably, the first sub-pixel and the second sub-pixel in the first pixel unit are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, and the third sub-pixel and the fourth sub-pixel in the second pixel unit are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, so that the first sub-pixel and the third sub-pixel are sequentially and alternately arranged in a row direction or a column direction, respectively, and the second sub-pixel and the fourth sub-pixel are sequentially and alternately arranged in the row direction or the column direction.
Preferably, the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered columns of odd-numbered rows, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered columns of even-numbered rows;
or the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered rows and even-numbered columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered rows and odd-numbered columns;
or the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered rows and odd-numbered columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered rows and even-numbered columns;
or, the first sub-pixels and the third sub-pixels are alternately arranged in even rows and even columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in odd rows and odd columns.
Preferably, centers of the first sub-pixel and the third sub-pixel in the same row or the same column are located on the same straight line, and centers of the second sub-pixel and the fourth sub-pixel in the same row or the same column are located on the same straight line.
Preferably, the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are uniformly arranged.
Preferably, the center of the first sub-pixel is located on a central line of a connecting line of centers of the third sub-pixels in two adjacent rows and in the same column as the first sub-pixel, and the center of the first sub-pixel is located on a central line of a connecting line of centers of the third sub-pixels in two adjacent columns and in the same row as the first sub-pixel;
the second sub-pixel or the fourth sub-pixel is located in a direction inclined by 45 degrees of the first sub-pixel or the third sub-pixel.
Preferably, the second sub-pixel and the fourth sub-pixel have the same area, and the first sub-pixel has the same area as the third sub-pixel and is larger than the second sub-pixel; or the area of the third sub-pixel is larger than that of the first sub-pixel, and the area of the first sub-pixel is larger than that of the second sub-pixel.
Preferably, a pitch between the adjacent first sub-pixel and the second sub-pixel is equal to a pitch between the adjacent third sub-pixel and the fourth sub-pixel; the distance between the adjacent first sub-pixel and the third sub-pixel is smaller than the distance between the adjacent second sub-pixel and the fourth sub-pixel.
Preferably, the basic colors include red, green and blue, the basic color of the first sub-pixel is red, the basic color of the third sub-pixel is blue, and the basic colors of the second sub-pixel and the fourth sub-pixel are green.
Preferably, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel have an axisymmetric shape having an axis of symmetry extending in a direction parallel to a row direction or a column direction.
Preferably, the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel have any one or a combination of a circle, a triangle, a quadrangle, a pentagon, a hexagon or an octagon.
Preferably, the first sub-pixel and the third sub-pixel are quadrilateral or octagonal and the first sub-pixel and the third sub-pixel are the same in shape, and the second sub-pixel and the fourth sub-pixel are quadrilateral or octagonal and the second sub-pixel and the fourth sub-pixel are the same in shape.
Preferably, the first sub-pixel and the second sub-pixel in the first pixel unit are respectively connected to a data line, the third sub-pixel and the fourth sub-pixel in the second pixel unit are respectively connected to a data line, and the data line is used for receiving pixel display information.
A display device comprises the pixel structure.
Preferably, the display device is an organic light emitting diode display device or a liquid crystal display device.
The utility model has the advantages that: the utility model provides a pixel structure, through the improvement of pixel arrangement mode, improved the pixel aperture opening ratio, also correspondingly improved the luminance of pixel structure, improved pixel resolution ratio; meanwhile, a display method aiming at the pixel structure is designed, so that normal image display can be realized, the phenomena of color edge errors and color nonuniformity in the pixel arrangement mode in the prior art can be avoided, the display effect of the display device is improved, and the problem that the resolution of the display device, especially an organic light-emitting display device, in the prior art is difficult to improve due to process problems is solved.
Drawings
FIG. 1A is a schematic structural diagram of RGB sub-pixels arranged in stripes in the prior art;
FIG. 1B is a schematic diagram of a prior art structure in which RGB sub-pixels are arranged in delta;
FIG. 1C is a schematic diagram of a prior art structure in which RGB sub-pixels are mosaics;
fig. 2A is a schematic structural diagram of an arrangement manner of each pixel unit in the pixel structure according to embodiment 1 of the present invention;
fig. 2B is a schematic structural diagram of another arrangement of the pixel units in the pixel structure according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram illustrating a positional relationship between sub-pixels in the pixel unit of FIG. 2A;
FIG. 4A is a schematic structural diagram of a mask plate shared by the first sub-pixel and the third sub-pixel;
FIG. 4B is a schematic structural diagram of a mask for forming a second sub-pixel and a fourth sub-pixel;
fig. 5 is a schematic diagram illustrating that the first pixel unit and the second pixel unit of the pixel structure in embodiment 2 realize RGB display by using adjacent sub-pixels without basic colors;
in the reference symbols:
1-a first pixel cell; 11-a first sub-pixel; 12-a second sub-pixel;
2-a second pixel cell; 21-a third sub-pixel; 22-fourth sub-pixel.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the pixel structure and the display device thereof with reference to the accompanying drawings.
The technical idea of the utility model is that the three primary colors of red, green and blue are utilized to mix colors to form a plurality of colors, thereby realizing the principle of image display; and by utilizing the characteristics of different color sensitivities of human eyes, the three primary colors of red, green and blue which are set as the same pixel unit in the prior art are dispersedly arranged in two adjacent pixel units, and the arrangement mode of the pixel units is adjusted, so that the adjacent pixel units in the pixel structure mutually use the basic color of the missing part of the adjacent pixel units in the display process to realize the display of the three primary colors of red, green and blue, thereby realizing the image display of different colors and obtaining better color uniformity.
A pixel structure comprises a first pixel unit and a second pixel unit which are sequentially arranged in a staggered mode, wherein the first pixel unit comprises a first sub-pixel and a second sub-pixel which are arranged in a diagonal mode, the second pixel unit comprises a third sub-pixel and a fourth sub-pixel which are arranged in a diagonal mode, the first sub-pixel and the third sub-pixel have different basic colors, and the second sub-pixel and the fourth sub-pixel have the same basic color.
The pixel structure can improve the aperture opening ratio of the sub-pixels while realizing high resolution, thereby simplifying the preparation process, obtaining better brightness level and prolonging the service life of the product; and through the setting of the weighted value of the basic color which is lost in the display process, the phenomena of color edge errors and uneven colors are avoided, and a better display effect is realized.
Example 1:
the present embodiment provides a pixel structure, as shown in fig. 2A and 2B, the pixel structure includes a first pixel unit 1 and a second pixel unit 2 that are sequentially staggered, the first pixel unit 1 includes a first sub-pixel 11 and a second sub-pixel 12 that are diagonally arranged, the second pixel unit 2 includes a third sub-pixel 21 and a fourth sub-pixel 22 that are diagonally arranged, and the first sub-pixel 11 and the third sub-pixel 21 have different basic colors, and the second sub-pixel 12 and the fourth sub-pixel 22 have the same basic color.
In the present embodiment, the basic color of the first sub-pixel 11 is red, the basic color of the third sub-pixel 21 is blue, and the basic colors of the second sub-pixel 12 and the fourth sub-pixel 22 are green. Wherein, the basic color refers to the color of the sub-pixel structure itself, which can realize color display, for example: for the pixel structure in the organic electroluminescent display device, the basic color refers to the color of the light-emitting layer in the organic electroluminescent diode, and the light-emitting layer can emit corresponding color under normal pressure; for a pixel structure in a liquid crystal display device, the basic Color refers to a Color of a Color film layer (CF) in a Color film substrate, and a light in a backlight source can be filtered by the Color film layer to obtain a corresponding Color. Typically, the base colors include red, green, and blue. In this embodiment, the basic color in the sub-pixel may be any one of three primary colors of red, green and blue.
As shown in fig. 2A and fig. 2B, the first pixel unit 1 and the second pixel unit 2 are arranged in a staggered manner in the present embodiment, directions of sub-pixel diagonal arrangement in the first pixel unit 1 and the second pixel unit 2 may be parallel to each other (as shown in fig. 2A) or cross each other or even perpendicular to each other (as shown in fig. 2B).
In the above pixel structure, the first pixel units 1 and the second pixel units 2 are alternately arranged in the row direction and the column direction. Specifically, the first pixel units 1 and the second pixel units 2 are alternately arranged in the row direction and the column direction, and in the pixel units in adjacent rows, the first pixel units 1 and the second pixel units 2 are arranged in the row direction and staggered by the position of one pixel unit, and in the pixel units in adjacent columns, the first pixel units 1 and the second pixel units 2 are arranged in the column direction and staggered by the position of one pixel unit, wherein the pixel units include the first pixel units 1 or the second pixel units 2.
Based on the staggered arrangement structure, the arrangement order of the first pixel unit 1 and the second pixel unit 2 in the adjacent pixel unit rows is different, and the arrangement order of the first pixel unit 1 and the second pixel unit 2 in the adjacent pixel unit columns is also different. As shown in fig. 2A and 2B, each pixel unit is shown by a dashed line box, in the pixel units of adjacent rows, the arrangement order of the first pixel unit 1 and the second pixel unit 2 in one row is the first pixel unit 1, the second pixel unit 2, the first pixel unit 1, and the second pixel unit 2 … …, and the arrangement order of the first pixel unit 1 and the second pixel unit 2 in the other row is the second pixel unit 2, the first pixel unit 1, the second pixel unit 2, and the first pixel unit 1 … …; among the pixel units in adjacent columns, the first pixel unit 1 and the second pixel unit 2 in one column are arranged in the order of the first pixel unit 1, the second pixel unit 2, the first pixel unit 1 and the second pixel unit 2 … …, and the first pixel unit 1 and the second pixel unit 2 in the other column are arranged in the order of the second pixel unit 2, the first pixel unit 1, the second pixel unit 2 and the first pixel unit 1 … …;
as for the arrangement order of the sub-pixels in each pixel unit, as shown in fig. 2A and 2B, the first sub-pixel 11 and the second sub-pixel 12 in the first pixel unit 1 are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, and the third sub-pixel 21 and the fourth sub-pixel 22 in the second pixel unit 2 are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, so that the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in the row direction or the column direction, respectively, and the second sub-pixel 12 and the fourth sub-pixel 22 are alternately arranged in the row direction or the column direction, respectively, that is, the second sub-pixel 12 and the fourth sub-pixel 22 are disposed in the same row or column.
In a specific arrangement, the first sub-pixels 11 and the third sub-pixels 21 are alternately arranged on odd-numbered lines or even-numbered lines, and the second sub-pixels 12 and the fourth sub-pixels 22 are alternately arranged on even-numbered lines or odd-numbered lines; accordingly, the first sub-pixels 11 and the third sub-pixels 21 are alternately disposed in odd or even columns, and the second sub-pixels 12 and the fourth sub-pixels 22 are alternately disposed in even or odd columns. The method specifically comprises the following arrangement structure: the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in odd-numbered rows and odd-numbered columns, and the second sub-pixel 12 and the fourth sub-pixel are alternately arranged in even-numbered rows and even-numbered columns; or, the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in the odd-numbered row and the even-numbered column, and the second sub-pixel 12 and the fourth sub-pixel are alternately arranged in the even-numbered row and the odd-numbered column; or, the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in odd-numbered rows and odd-numbered columns, and the second sub-pixel 12 and the fourth sub-pixel are alternately arranged in even-numbered rows and even-numbered columns; alternatively, the first sub-pixels 11 and the third sub-pixels 21 are alternately arranged in even rows and even columns, and the second sub-pixels 12 and the fourth sub-pixels are alternately arranged in odd rows and odd columns. It should be noted that, for the way that the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in the odd-numbered row and even-numbered column, and the second sub-pixel 12 and the fourth sub-pixel are alternately arranged in the even-numbered row and odd-numbered column, or the first sub-pixel 11 and the third sub-pixel 21 are alternately arranged in the even-numbered row and odd-numbered column, and the second sub-pixel 12 and the fourth sub-pixel are alternately arranged in the odd-numbered row and even-numbered column, because a situation that a row of a single sub-pixel or a column of a single sub-pixel may occur at an edge, the sub-pixel may form a pixel unit including three sub-pixels together with the first pixel unit 1 or the second pixel unit 2 adjacent to the sub-pixel, or may use two sub-pixels in the first pixel unit 1 or the second pixel unit 2 adjacent to the sub-pixel unit to the sub-pixel to perform display, and a good display effect may be.
As shown in fig. 2A and 2B, of the sub-pixels in adjacent rows, the first sub-pixel 11 and the third sub-pixel 21 in one row are alternately arranged, and the sub-pixels in the other row are alternately arranged in the order of the second sub-pixel 12 and the fourth sub-pixel 22; correspondingly, the sub-pixels in adjacent columns are arranged in an alternating manner, wherein the first sub-pixel 11 and the third sub-pixel 21 in one column are arranged alternately, and the sub-pixels in the other column are arranged in an alternating manner, namely the second sub-pixel 12 and the fourth sub-pixel 22. In practical application, the length and width of the display panel can be flexibly set according to practical conditions such as the length, the width and the like of the display panel.
Taking the pixel structure in fig. 2A as an example, as shown by the dotted line in fig. 3, the centers of the first sub-pixel 11 and the third sub-pixel 21 in the same row or the same column are located on the same straight line, and the centers of the second sub-pixel 12 and the fourth sub-pixel 22 in the same row or the same column are located on the same straight line, so as to simplify the manufacturing process of the pixel structure.
In order to ensure uniformity of display effect, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21 and the fourth sub-pixel 22 are uniformly arranged. Based on the arrangement, the red, green and blue sub-pixels can be uniformly distributed on the whole display panel, so that higher-quality picture display can be realized.
Correspondingly, as shown in fig. 3, the center of the first sub-pixel 11 is located on the middle line of the connecting lines of the centers of the third sub-pixels 21 in the same column as the first sub-pixel 11 in two adjacent rows, and the center is located on the middle line of the connecting lines of the centers of the third sub-pixels 21 in the same row as the first sub-pixel 11 in two adjacent rows. For example: the center of the first sub-pixel 11 is located on the middle line of the center connecting line of the adjacent third sub-pixel 21 in the adjacent row, and the center of the first sub-pixel 11 is located on the middle line of the center connecting line of the adjacent third sub-pixel 21 in the adjacent column. It can be inferred from theoretical knowledge of plane geometry that the center of the third sub-pixel 21 is located on the centerline of the connecting line of the centers of the first sub-pixels 11 adjacent thereto in the adjacent row, and the center of the third sub-pixel 21 is located on the centerline of the connecting line of the centers of the first sub-pixels 11 adjacent thereto in the adjacent column.
In addition, as shown in fig. 3, the second sub-pixel 12 or the fourth sub-pixel 22 is located in a direction inclined by 45 degrees with respect to the first sub-pixel 11 or the third sub-pixel 21. That is, in the adjacent pixel unit, the second sub-pixel 12 is located in a direction inclined by 45 degrees of the first sub-pixel 11 or the third sub-pixel 21, such as an upper left 45 degree direction, an upper right 45 degree direction, a lower left 45 degree direction, or a lower right 45 degree direction. Shown in fig. 2A is an arrangement direction in which the second sub-pixels 12 are located in the 45-degree direction at the lower right.
In this embodiment, the first sub-pixel 11 is a red sub-pixel, the second sub-pixel 12 is a green sub-pixel, the third sub-pixel 21 is a blue sub-pixel, and the fourth sub-pixel 22 is a green sub-pixel. In the area arrangement of the sub-pixels, it is preferable that the second sub-pixel 12 and the fourth sub-pixel 22 have the same area, and the first sub-pixel 11 has the same area as the third sub-pixel 21 and is larger than the second sub-pixel 12. In the present embodiment, since the human eye is more sensitive to green, the areas of the second sub-pixel 12 and the fourth sub-pixel 22 may be set smaller relative to the areas of the first sub-pixel 11 and the third sub-pixel 21.
In another preferred mode, the area of the third sub-pixel 21 is larger than the area of the first sub-pixel 11, and the area of the first sub-pixel 11 is larger than the area of the second sub-pixel 12. In particular, for the organic light emitting diode display device, since the blue light emitting material generally has the lowest light emitting efficiency and the shortest life time compared to red and green, the blue sub-pixel area may be larger than the red and green sub-pixel areas. In addition, the green emitting material is most efficient, and thus the green sub-pixel area can be made minimum.
In this embodiment, the pixel structure may be formed in an RGBG or GRGB or BRGR format, so that the image displayed by the display panel is more full.
In the present embodiment, the pitch between the adjacent first sub-pixel 11 and second sub-pixel 12 is equal to the pitch between the adjacent third sub-pixel 21 and fourth sub-pixel 22; the pitch between the adjacent first sub-pixel 11 and third sub-pixel 21 is smaller than the pitch between the adjacent second sub-pixel 12 and fourth sub-pixel 22.
As shown in fig. 3, if a connection line between two closest points of adjacent sub-pixels is taken as a pitch of the sub-pixels, a pitch d1 between the first sub-pixel 11 and the second sub-pixel 12 and a pitch d2 between the third sub-pixel 21 and the fourth sub-pixel 22 are equal; further, for the sub-pixels located at the edge of the display screen, which do not constitute a complete two-pixel unit, for example: for three sub-pixels having exactly three primary colors, the spacing between the first sub-pixel 11 and the third sub-pixel 21 and the spacing d1 between the first sub-pixel 11 and the second sub-pixel 12 may also be equal to simplify the fabrication process of the pixel structure.
In addition, the distance d3 between two adjacent second sub-pixels 12 and the distance d4 between two adjacent fourth sub-pixels 22 are equal and smaller than the distance d5 between two adjacent first sub-pixels 11 and the distance d6 between two adjacent third sub-pixels 21; the spacing d7 between the adjacent first sub-pixel 11 and the third sub-pixel 21 is smaller than the spacing d8 between the adjacent second sub-pixel 12 and the fourth sub-pixel 22.
It should be understood herein that the spacing between the sub-pixels can be flexibly designed as required to ensure the accuracy of the display screen formed by the plurality of sub-pixels.
In the present embodiment, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21 and the fourth sub-pixel 22 are shaped as an axisymmetric pattern having a symmetry axis extending in a direction parallel to a row direction or a column direction of the sub-pixel arrangement, thereby allowing each pixel unit in the pixel structure to form a structure arranged along the symmetry axis of the sub-pixel pattern. Thus, for example, when a pixel structure is formed by using a high-precision metal mask plate FMM, the FMM mask plate is usually stretched along the row direction or the column direction in the process, and the symmetry axes of the sub-pixel patterns are arranged along the row direction or the rear column direction, so that the shape of the sub-pixels cannot be deformed due to the stretching process of the FMM mask plate, and the correct position of each sub-pixel in the pixel structure can be ensured.
Specifically, the shape of the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22 is any one or a combination of a circle, a triangle, a quadrangle, a pentagon, a hexagon, or an octagon, for example, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22 may be a quadrangle or an octagon, or the first sub-pixel 11, the third sub-pixel 21 are an octagon, the second sub-pixel 12, and the fourth sub-pixel 22 are a quadrangle, and so on, which may be determined according to actual design requirements. As a specific example, the sub-pixels are all in a diamond shape or a square shape, the symmetry axis of the pattern may be an oblique diagonal line, and the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22 are arranged along the oblique diagonal line of the sub-pixel pattern.
In practical application, the display panel can be flexibly set according to practical situations such as application occasions of the display panel, display effects required by customers and the like. For example: each sub-pixel may be designed to be a quadrangle as shown in fig. 2A or 2B, and may be designed to be an octagon (for example, an octagon formed by cutting four corners of the quadrangle sub-pixel in fig. 2A or 2B) in consideration of the display panel wiring and mask (mask) manufacturing process. Of course, other shapes are possible, such as hexagonal, circular, triangular, pentagonal, etc.
Preferably, the first sub-pixel 11 and the third sub-pixel 21 are quadrilateral or octagonal and the first sub-pixel 11 and the third sub-pixel 21 are identical in shape, the second sub-pixel 12 and the fourth sub-pixel 22 are quadrilateral or octagonal and the second sub-pixel 12 and the fourth sub-pixel 22 are identical in shape, which facilitates the fabrication of a mask (mask).
On this basis, the first pixel unit 1 and the second pixel unit 2 include an organic light emitting diode display device or a liquid crystal display device, that is, the pixel structure in the present embodiment is applicable to both the organic light emitting diode display device and the LCD display device, and of course, may also be applied to other devices having a pixel structure, such as a digital camera, a plasma display device, and the like.
The first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21 and the fourth sub-pixel 22 are formed by adopting a composition process, for the structure that the area of the first sub-pixel 11 is the same as that of the third sub-pixel 21 and is larger than that of the second sub-pixel 12, the first sub-pixel 11 and the third sub-pixel 21 share the same mask plate to be formed in the composition process twice, and the second sub-pixel and the fourth sub-pixel 22 are formed by using the same mask plate in the composition process once. When the areas of the first sub-pixel 11 and the third sub-pixel 21 are set to be the same, the same mask may be used in preparation of the red sub-pixel and the blue sub-pixel, and the mask may be moved in parallel in the row direction or the column direction by the pitch of the row/column sub-pixels.
Here, the patterning process may include only a photolithography process, or may include a photolithography process and an etching step, and may also include other processes for forming a predetermined pattern, such as printing, inkjet printing, and the like; the photolithography process refers to a process of forming a pattern by using a photoresist, a mask plate, an exposure machine, and the like, including processes of film formation, exposure, development, and the like. Corresponding patterning processes may be selected according to the structures formed in the present invention.
At this time, because the mask used by the green sub-pixels has a larger opening pitch than that of a mask plate of an FMM in a traditional strip arrangement mode, when the mask is used for an organic light-emitting diode display device, the pixel pitch is shifted from a row direction or a column direction to a diagonal direction, so that the sub-pixel pitch is increased, and the mask plate process is facilitated. As shown in fig. 4A, in which the pattern region is set as an opening region of a mask plate used for preparing a red sub-pixel, the opening pitch is much larger than the FMM pitch of the conventional stripe arrangement; as shown in fig. 4B, in which the pattern region is set as an opening region of a mask plate used for preparing green sub-pixels, the opening pitch is much larger than the FMM pitch of the conventional stripe arrangement. It should be understood here that the criss-cross horizontal and vertical lines provided in fig. 4A and 4B are for the convenience of viewing the positions and pitches of the opening regions corresponding to the respective sub-pixels, and do not exist in the actual mask plate.
Therefore, the opening pitches of the mask plate of the red sub-pixel, the blue sub-pixel and the green sub-pixel are increased, so that the FMM design and the organic layer evaporation process are facilitated, and the high resolution is realized more easily. Therefore, compared with the pixel structure of realizing one pixel unit by three sub-pixels in the prior art, the pixel structure can greatly simplify the manufacturing process, and the FMM process is easier to realize.
Meanwhile, in the pixel structure of the present embodiment, each pixel unit is composed of only two sub-pixels, and each sub-pixel is connected to a data line, which is used for receiving pixel information through the data line, as in the prior art. I.e. the process is repeated. The first sub-pixel 11 and the second sub-pixel 12 in the first pixel unit 1 are respectively connected to one data line (not shown in both fig. 2A and 2B), and the third sub-pixel 21 and the fourth sub-pixel 22 in the second pixel unit 2 are respectively connected to one data line. Therefore, compared with the prior art, the number of the data lines in the embodiment is less under the condition of having the same pixel unit, so that the power consumption of the display device is reduced, the aperture opening ratio of the display device is improved, and the brightness of the pixel structure in the display device is correspondingly improved.
The present embodiment further provides a display method corresponding to the pixel structure in the present embodiment. The pixel structure utilizes two sub-pixels to form a pixel unit, and can realize pixel display with higher resolution by combining with a pixel sharing algorithm.
In the present embodiment, the first pixel unit 1 uses the third sub-pixel 21 in at least one adjacent second pixel unit 2 for display, and the second pixel unit 2 uses the first sub-pixel 11 in at least one adjacent first pixel unit 1 for display, so that the first pixel unit 1 and the second pixel unit 2 can both display the pixel display information of the sub-pixels of the three basic colors.
When displaying, the first pixel unit 1 has a red sub-pixel and a green sub-pixel, and realizes RGB three-primary color display by using a blue sub-pixel in the adjacent second pixel unit 2; similarly, the second pixel unit 2 has a blue sub-pixel and a green sub-pixel, and realizes RGB display by using the red sub-pixel in the adjacent first pixel unit 1. With specific borrowing principle, as shown in fig. 5, each pixel unit may borrow its color-missing sub-pixel in its adjacent pixel units on either side, for example: borrowing sub-pixels of adjacent pixel units on the right side or the left side of the pixel units or borrowing sub-pixels of adjacent pixel units above or below the pixel units; meanwhile, a plurality of sub-pixels can be simultaneously borrowed, or only one sub-pixel can be borrowed, which are not limited.
In the process of image display, firstly, a pixel display information data source is provided, pixel data with red, green and blue color information is input into each of the first pixel unit 1 and the second pixel unit 2, and the display method of the pixel structure comprises the following steps:
step S1): theoretical luminance values of colors in the first pixel unit 1 corresponding to the basic colors of the first and second sub-pixels 11 and 12 and theoretical luminance values of colors in the second pixel unit 2 corresponding to the basic colors of the third and fourth sub-pixels 21 and 22 are obtained from the pixel display information data.
In the step, according to the working principle of the display panel driving chip, the pixel data is subjected to color separation, amplification and correction to obtain three primary colors, and then the three primary colors are subjected to matrix transformation to obtain a brightness signal, wherein the brightness signal is the theoretical brightness value of the colors corresponding to the three primary colors. This part of the processing may be any luminance separation processing method known in the art, and therefore will not be described in detail here.
Step S2): the actual luminance values of the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21 and the fourth sub-pixel 22 are calculated.
In short, taking the luminance value calculation of the red sub-pixel as an example, the actual luminance value of the first sub-pixel 11 in the first pixel unit 1 is obtained by weighting the theoretical luminance value of the red to be displayed in the pixel unit and the theoretical luminance value of the red to be displayed in at least one second pixel unit 2 of the adjacent row or column. Similarly, the actual luminance value of the third sub-pixel 21 in the second pixel unit 2 is calculated in a similar manner.
Specifically, in this step, the actual luminance values of the second sub-pixel 12 and the fourth sub-pixel 22 are set to the theoretical luminance values of the colors corresponding to the basic colors thereof;
the actual luminance value of the first sub-pixel 11 is set as a weighted sum of the theoretical luminance value of the basic color corresponding to the required first sub-pixel in the first pixel unit 1 and the theoretical luminance value of the basic color corresponding to the required first sub-pixel 11 in the at least one second pixel unit 2 adjacent thereto;
the actual luminance value of the third sub-pixel 21 is set as a weighted sum of the theoretical luminance value of the basic color corresponding to the required third sub-pixel 21 in the second pixel unit 2 and the theoretical luminance value of the basic color corresponding to the required second sub-pixel 12 in the at least one adjacent first pixel unit 1.
For example: the first pixel unit 1 uses the third sub-pixel 21 in the N adjacent second pixel units 2 to display, the second pixel unit 2 uses the first sub-pixel 11 in the N adjacent first pixel units 1 to display the sub-pixel of the basic color missing from the first pixel unit 1, and the second pixel unit 2 uses the sub-pixel of the basic color missing from the second pixel unit 2 in the N adjacent first pixel units 1 to realize the red, green and blue three primary color display; accordingly, in this step, the weighted values of the theoretical luminance values of the first sub-pixel 11 and the third sub-pixel 21 are both 1/N, where: n is more than or equal to 1. It should be understood herein that the weighting values can be appropriately adjusted to obtain a more appropriate weighted sum according to the overall effect (e.g., brightness or darkness) of the picture of the image corresponding to the pixel data.
In a preferred and simple manner, the first pixel unit 1 uses the third sub-pixel 21 in the adjacent second pixel unit 2 for display, and the second pixel unit 2 uses the first sub-pixel 11 in the adjacent first pixel unit 1 for display; accordingly, in this step, the theoretical luminance values of the first sub-pixel 11 and the third sub-pixel 21 are weighted 1/2.
In this embodiment, the final actual luminance value of the actual sub-pixel is the sum of products obtained by multiplying the theoretical luminance value of its own basic color and the theoretical luminance value of the sub-pixel having the same basic color in the borrowed adjacent pixel unit by the respective weighted values, respectively. For example, when one pixel unit borrows two adjacent pixel units, the relationship between the weighted value and the weighted sum is that in H ═ Ax + By + Cz, A, B, C are respectively the weighted values of the sub-pixels with the same basic color in the three pixel units, wherein each weighted value satisfies the relationship: a + B + C is 1; h is the actual luminance value of the base color sub-pixel, i.e. the weighted sum.
Taking as an example that each pixel unit can borrow the sub-pixel of the basic color missing in the adjacent pixel unit on the right side thereof, since each red sub-pixel and each blue sub-pixel are used for the display of two pixel units, the input data signal thereof is the weighted superposition of the two sub-pixel signals, for example, taking the blue sub-pixel as an example, the input signal thereof is the sum of the signal of the blue sub-pixel in the pixel unit where it is located and the signal of the B sub-pixel required for normal display in the adjacent second pixel unit 2, for example, each pixel can be 1/2.
Step S3): actual luminance values are input to the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22, and red, green, and blue three primary colors are displayed, thereby realizing image display.
In this step, the actual luminance values of the respective sub-pixels obtained in step S2) are output to the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22, and image display is realized.
As exemplified by the pixel structure in embodiment 1, each sub-pixel is connected to one data line, and the actual luminance values of the sub-pixels obtained in step S2) are output through the data lines connected to the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 21, and the fourth sub-pixel 22, respectively. Of course, it is understood that, on the basis of the actual luminance of each sub-pixel calculated in step S2), the theoretical luminance values corresponding to the three basic colors in one pixel unit may be first converted into actual luminance values corresponding to the two sub-pixels in one pixel unit by a processing unit or a data conversion module, and the actual luminance values are connected to one pixel unit by two data lines, and the detailed data conversion process is not described in detail here.
The display method adopting the pixel structure realizes the three-primary-color image color display of the pixel unit with the two sub-pixels by utilizing the pixel unit only comprising the two sub-pixels and through a simple pixel sharing algorithm, thereby realizing a brand new display method of a new pixel structure.
Example 2:
the present embodiment provides a display device that employs the pixel structure and the display method of the pixel structure in embodiment 1.
The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, electronic paper, an OLED panel, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In the display device, the pixel structure has a better evaporation process, so that the yield is higher; moreover, the pixel structure has higher brightness and color uniformity, so that the display effect is better.
The utility model provides a pixel structure, through the improvement of pixel arrangement mode, improved the pixel aperture opening ratio, also correspondingly improved the luminance of pixel structure, improved pixel resolution ratio; meanwhile, a display method aiming at the pixel structure is designed, so that normal image display can be realized, the phenomena of color edge errors and color nonuniformity in the pixel arrangement mode in the prior art can be avoided, the display effect of the display device is improved, and the problem that the resolution of the display device, especially an organic light-emitting display device, in the prior art is difficult to improve due to process problems is solved.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (16)
1. A pixel structure is characterized by comprising a first pixel unit and a second pixel unit which are sequentially arranged in a staggered mode, wherein the first pixel unit comprises a first sub-pixel and a second sub-pixel which are arranged in a diagonal mode, the second pixel unit comprises a third sub-pixel and a fourth sub-pixel which are arranged in a diagonal mode, the first sub-pixel and the third sub-pixel have different basic colors, and the second sub-pixel and the fourth sub-pixel have the same basic color.
2. The pixel structure according to claim 1, wherein the first pixel units and the second pixel units are alternately arranged in a row direction and a column direction, and in the pixel units in adjacent rows, the first pixel units and the second pixel units are arranged in the row direction and shifted by one pixel unit, and in the pixel units in adjacent columns, the first pixel units and the second pixel units are arranged in the column direction and shifted by one pixel unit, wherein the pixel units include the first pixel units or the second pixel units.
3. The pixel structure according to claim 2, wherein the first sub-pixel and the second sub-pixel in the first pixel unit are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, and the third sub-pixel and the fourth sub-pixel in the second pixel unit are disposed in two adjacent rows of sub-pixels and two adjacent columns of sub-pixels, such that the first sub-pixel and the third sub-pixel are alternately arranged in sequence in a row direction or a column direction, respectively, and the second sub-pixel and the fourth sub-pixel are alternately arranged in sequence in the row direction or the column direction, respectively.
4. The pixel structure according to claim 3, wherein the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered columns of odd-numbered rows, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered columns of even-numbered rows;
or,
the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered rows and even-numbered columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered rows and odd-numbered columns;
or,
the first sub-pixels and the third sub-pixels are alternately arranged in odd-numbered rows and odd-numbered columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in even-numbered rows and even-numbered columns;
or,
the first sub-pixels and the third sub-pixels are alternately arranged in even rows and even columns, and the second sub-pixels and the fourth sub-pixels are alternately arranged in odd rows and odd columns.
5. The pixel structure according to claim 4, wherein centers of the first sub-pixel and the third sub-pixel in the same row or the same column are located on the same straight line, and centers of the second sub-pixel and the fourth sub-pixel in the same row or the same column are located on the same straight line.
6. The pixel structure according to claim 5, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are uniformly arranged.
7. The pixel structure according to claim 6, wherein the center of the first sub-pixel is located on a central line of a connecting line of centers of the third sub-pixels in two adjacent rows and the same column as the first sub-pixel, and the center of the first sub-pixel is located on a central line of a connecting line of centers of the third sub-pixels in two adjacent columns and the same column as the first sub-pixel;
the second sub-pixel or the fourth sub-pixel is located in a direction inclined by 45 degrees of the first sub-pixel or the third sub-pixel.
8. The pixel structure according to claim 7, wherein the second sub-pixel and the fourth sub-pixel have the same area, and the first sub-pixel has the same area as the third sub-pixel and is larger than the second sub-pixel; or the area of the third sub-pixel is larger than that of the first sub-pixel, and the area of the first sub-pixel is larger than that of the second sub-pixel.
9. The pixel structure according to claim 8, wherein a pitch between the adjacent first sub-pixel and the second sub-pixel is equal to a pitch between the adjacent third sub-pixel and the fourth sub-pixel; the distance between the adjacent first sub-pixel and the third sub-pixel is smaller than the distance between the adjacent second sub-pixel and the fourth sub-pixel.
10. The pixel structure according to any of claims 1-9, wherein the base colors comprise red, green and blue, the base color of the first sub-pixel is red, the base color of the third sub-pixel is blue, and the base colors of the second sub-pixel and the fourth sub-pixel are green.
11. The pixel structure according to any one of claims 1 to 9, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are shaped in an axisymmetric pattern having an axis of symmetry extending in a direction parallel to a row direction or a column direction.
12. The pixel structure according to claim 11, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel have any one or more of a circular shape, a triangular shape, a quadrangular shape, a pentagonal shape, a hexagonal shape or an octagonal shape.
13. The pixel structure of claim 12, wherein the first sub-pixel and the third sub-pixel are quadrilateral or octagonal and the first sub-pixel and the third sub-pixel are the same shape, and wherein the second sub-pixel and the fourth sub-pixel are quadrilateral or octagonal and the second sub-pixel and the fourth sub-pixel are the same shape.
14. The pixel structure according to any one of claims 1 to 9, wherein the first sub-pixel and the second sub-pixel in the first pixel unit are respectively connected to one data line, and the third sub-pixel and the fourth sub-pixel in the second pixel unit are respectively connected to one data line, and the data line is configured to receive pixel display information.
15. A display device comprising a pixel structure according to any one of claims 1 to 14.
16. The display device according to claim 15, wherein the display device is an organic light emitting diode display device or a liquid crystal display device.
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