CN113871443B

CN113871443B - Sub-pixel unit, pixel arrangement structure and display panel

Info

Publication number: CN113871443B
Application number: CN202111131106.1A
Authority: CN
Inventors: 余海军
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2023-04-07
Anticipated expiration: 2041-09-26
Also published as: CN113871443A

Abstract

The application provides a sub-pixel unit, a pixel arrangement structure and a display panel, which comprise at least two of a first pixel group, a second pixel group and a third pixel group or at least two second pixel groups; the first pixel group, the second pixel group and the third pixel group respectively comprise a first sub-pixel, a second sub-pixel and a third sub-pixel, and the ratio of the number of the first sub-pixel, the second sub-pixel and the third sub-pixel is 1; the first sub-pixel, the second sub-pixel and the third sub-pixel in the first pixel group are arranged in parallel to form a structure with a row and three lines; one of the first sub-pixel, the second sub-pixel and the third sub-pixel in the second pixel group is shared by the other two sub-pixels; and the first sub-pixel, the second sub-pixel and the third sub-pixel in the third pixel group are respectively arranged in parallel and form a structure of three columns and one row.

Description

Sub-pixel unit, pixel arrangement structure and display panel

Technical Field

The application relates to the technical field of display, in particular to a sub-pixel unit, a pixel arrangement structure and a display panel.

Background

Organic Light Emitting Display (OLED) is regarded as the next generation of the most promising new flat panel Display technology. The colorization mode is to evaporate sub-pixels of three materials of R, G and B (Red, green and Blue RGB for short) to form a pixel structure. Because people have higher pursuit to the visual effect at present, the design of the display effect of the display panel needs to be fully improved. The improvement of the display effect has a close relation with the arrangement mode of the pixel structures on the display panel. In the traditional scheme, pixels are generally arranged according to an RGB mode, and the density of the obtained RGB pixels is always low, so that the resolution of a screen body is difficult to improve.

Therefore, the prior art has defects which need to be solved urgently.

Disclosure of Invention

The application provides a brand-new sub-pixel unit, a pixel arrangement structure and a display panel, which can improve the technical problem of the aperture opening ratio of pixels.

In order to solve the above problems, the technical solution provided by the present application is as follows:

a sub-pixel unit at least comprises any two of a first pixel group, a second pixel group and a third pixel group or at least comprises two second pixel groups;

the first pixel group, the second pixel group and the third pixel group respectively comprise a first sub-pixel, a second sub-pixel and a third sub-pixel, and the number ratio of the first sub-pixel, the second sub-pixel and the third sub-pixel is 1;

the first sub-pixel, the second sub-pixel and the third sub-pixel in the first pixel group are arranged in parallel to form a structure with a row and three lines;

a row-column structure formed by sharing one sub-pixel of the first sub-pixel, the second sub-pixel and the third sub-pixel in the second pixel group by the other two sub-pixels; and

the first sub-pixel, the second sub-pixel and the third sub-pixel in the third pixel group are respectively arranged in parallel and form a structure of three rows and one column.

In some of these embodiments, the overall length of the first pixel group, the overall length of the second pixel group, and the overall length of the third pixel group are all the same.

In some embodiments, a shared sub-pixel in the sub-pixels of three colors in the second pixel group is in a column, and the other two sub-pixels are arranged above and below one side of the sub-pixel and in another column; or one of the sub-pixels of the three colors in the second pixel group, which are shared, is self-aligned in a row, and the other two sub-pixels are arranged in the left and right direction on one side of the sub-pixel and are in another row.

In some embodiments, among the at least two second pixel groups constituting the sub-pixel unit, a sub-pixel shared by a first second pixel group is located at a different position in the second pixel group than a sub-pixel shared by another second pixel group.

In some embodiments, the area of a shared sub-pixel in the second pixel group is greater than the sum of the areas of two other sub-pixels.

In some of these embodiments, the first, second and third subpixels are configured to emit different colors of light.

The first sub-pixel, the second sub-pixel, and the third sub-pixel are respectively configured to emit one of red light, green light, or blue light.

In some embodiments, the shape of any one of the first sub-pixel, the second sub-pixel and the third sub-pixel is a regular shape or an irregular shape.

A pixel arrangement, comprising: a plurality of repeatedly arranged sub-pixel units, wherein the sub-pixel units are the sub-pixel units described above.

A display panel, comprising: a substrate and a pixel arrangement as described above.

The beneficial effect of this application does: the application provides a sub-pixel unit, pixel arrangement structure and display panel, utilize first sub-pixel, second sub-pixel and third sub-pixel form the pixel group of different arrangement structure, the pixel group of at least two kinds of different arrangement structure passes through various quantity ratio and different permutation and combination can form multiple sub-pixel unit, and pixel arrangement structure is the repetition of sub-pixel unit again, so, can obtain the sub-pixel unit of different aperture ratios according to the range of the pixel group of different arrangement structure, or under the condition that the aperture ratio is the same, adjust the order and the quantity ratio of arranging about the sub-pixel unit, with the adjacent relation of sub-pixel between the change pixel group, and then with the sawtooth sense of promoting resolution ratio and improvement picture edge.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a layout structure of first, second and third pixel groups provided in the present application;

FIGS. 2 (A) -2 (D) are schematic diagrams illustrating the arrangement of sub-pixel units formed by the first, second and third pixel groups shown in FIG. 1;

FIG. 3 is a schematic diagram of another sub-pixel unit arrangement formed by the first, second and third pixel groups shown in FIG. 1;

FIGS. 4 (A) -4 (C) are schematic views illustrating an arrangement of a sub-pixel unit formed by the first, second and third pixel groups shown in FIG. 1;

FIGS. 5 (A) -5 (B) are prior art pixel arrangements compared to the sub-pixel units of the present application.

Description of the reference numerals

1. 110, 120, 130-sub-pixel unit

10-a first group of pixels; 20-second group of pixels

201. 202, 203, 204-second group of sub-pixels

30-third pixel group

11-first sub-pixel, 21-second sub-pixel, 31-third sub-pixel

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. The pixel arrangement structure of the present application is described in detail with reference to specific embodiments.

The embodiment of the invention provides a sub-pixel unit 1. The pixel arrangement structure and the Display panel formed by the sub-pixel unit 1 can be applied to various Display devices such as an Organic Light-Emitting Diode (OLED) Display device, a Light-Emitting Diode (LED) Display device, a Liquid Crystal Display (LCD) device, and the like, for example, a computer, a mobile phone, a tablet computer, and the like, without being limited thereto. The embodiment of the invention provides a novel pixel arrangement structure which can effectively improve the display effect of a display panel.

The pixel arrangement structure in the embodiment of the present invention includes a plurality of sub-pixel units 1 arranged repeatedly. The sub-pixel unit 1 includes at least two of the first pixel group 10, the second pixel group 20, the third pixel group 30, or at least two of the second pixel groups 20. The first pixel group 10, the second pixel group 20, and the third pixel group 30 each include a first sub-pixel 11, a second sub-pixel 21, and a third sub-pixel 31, and a ratio of the number of the first sub-pixel 11, the second sub-pixel 21, and the third sub-pixel 31 is 1.

The first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 in the first pixel group 10 are arranged in parallel to form a column and three rows structure.

In the second pixel group 20, one of the first sub-pixel 11, the second sub-pixel 21, and the third sub-pixel 31 has a row-column structure in which the other two sub-pixels share the same sub-pixel. According to the calculation formula of the aperture ratio: aperture ratio = aperture area of individual sub-pixel/AA area, since the area of AA area (i.e., display area of display panel) is fixed, it is possible to change the aperture ratio by changing the aperture area of a certain sub-pixel and to set a certain sub-pixel to be common, thereby increasing the aperture ratio of the sub-pixel to be common.

Specifically, the second pixel group 20 may have a structure as shown in fig. 1, where one of the three sub-pixels in the second pixel group 20 that is shared is arranged in a column, and the other two sub-pixels are arranged above and below one side of the one sub-pixel and in another column.

In this embodiment, the area of one sub-pixel shared by the second pixel group 20 is larger than the sum of the areas of the other two sub-pixels. That is, the area of two sub-pixels arranged above and below can be adjusted to adjust the aperture ratio of a sub-pixel in the second pixel group 20.

Alternatively, as shown in fig. 1, one of the three sub-pixels in the second pixel group 20 that is shared is self-aligned, and the other two sub-pixels are arranged in the left and right direction on one side of the one sub-pixel and in the other row. Thus, the second pixel group 20 has 4 types. The sub-pixels in the two pixel units in different rows or different columns mutually borrow the brightness, so that the opening ratio of the pixel units can be ensured, and the difficulty of the process for preparing the sub-pixels is reduced.

In some embodiments, among the at least two second pixel groups 20 constituting the sub-pixel unit 1, a sub-pixel shared by a first second pixel group 20 is located at a different position in the second pixel group 20 than a sub-pixel shared by another second pixel group 20 is located in the second pixel group 20. In this way, the arrangement positions of the sub-pixels in the sub-pixel unit 1 are different, and one arrangement with a strong edge image quality can be selected from the left and right arrangements, thereby reducing or weakening the feeling of splitting of the image edge.

The first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 in the third pixel group 30 are respectively arranged in parallel and are configured in a structure of three columns and one row.

In some of these embodiments, the overall length H of the first pixel group 10, the overall length H of the second pixel group 20, and the overall length H of the third pixel group 30 are all the same. Therefore, in order to reasonably utilize the display space, the sub-pixel units are arranged in the effective display area of the display panel, and the waste of the space is avoided.

In the present embodiment, the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 are configured to emit light of different colors, respectively. For example, the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 are configured to emit one of red, green and blue light, respectively. In the first pixel group 10, the second pixel group 20 and the third pixel group 30, the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 are not in a fixed order, that is, for three positions of each pixel group, the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 can be changed in color at will according to the aperture ratio actually required.

Any one of the first subpixel 11, the second subpixel 21, and the third subpixel 31 has a regular shape or an irregular shape. In this embodiment, the first sub-pixel 11, the second sub-pixel 21, and the third sub-pixel 31 have a regular shape, and more preferably, the first sub-pixel 11, the second sub-pixel 21, and the third sub-pixel 31 have any one of a circle, an ellipse, a triangle, a quadrangle, a pentagon, a hexagon, and an octagon.

In the present embodiment, the first sub-pixel 11, the second sub-pixel 21, and the third sub-pixel 31 are illustrated as being square, but it is understood that other shapes can be used. In the embodiment, all the sub-pixels are quadrilateral, so that the sub-pixels can be closely matched, the space utilization rate of an effective display area is improved as high as possible, and the aperture opening ratio of the pixels can be improved.

In order to achieve a desired aperture ratio, the first subpixel 11, the second subpixel 21, and the third subpixel 31 may have the same shape or different shapes.

In order to achieve a desired aperture ratio, the areas of the first subpixel 11, the second subpixel 21, and the third subpixel 31 may be set at a certain ratio. For example, for the first pixel group 10, the areas of the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 may be set in a ratio of 1. That is, the present embodiment protects the arrangement manner of each pixel group, and the area ratio of each sub-pixel included in each pixel group can be designed by itself.

Because the three sub-pixels included in each pixel group can set the light-emitting color according to the actual requirement, and the image quality can be respectively evaluated according to the left and right positions by at least two pixel groups included in each sub-pixel unit 1, a plurality of sub-pixel units 1 with different light-emitting effects can be obtained. For example, the sub-pixel unit 1 is composed of the first pixel group 10 and the second pixel group 20 arranged in a number ratio of 1, the sub-pixel unit 1 obtained by the first pixel group 10 on the left and the second pixel group 20 on the right is different from the pixel unit obtained by the first pixel group 10 on the right and the second pixel group 20 on the left in terms of the arrangement position of each sub-pixel, so that the combination order of the first pixel group 10 and the second pixel group 20 can be adjusted according to the color shift at a specific position.

To sum up, the application provides a brand-new display device's pixel arrangement mode, select different kinds of pixel groups in by several kinds of basic pixel groups, and arrange the pixel arrangement mode that the combination can obtain countless kinds of aperture ratio according to the different quantity ratios of different kinds of pixel group collocation, consequently, the combination that can select different pixel groups through actual demand makes whole display panel's overall arrangement more reasonable, optimize display panel's spatial layout, when improving certain sub-pixel's aperture ratio, can also promote display panel's resolution ratio, and then reduce sub-pixel current density, and then promote sub-pixel's life.

Example 1

The sub-pixel unit 1 is formed by arranging any two of the first pixel group 10, the second pixel group 20 and the third pixel group 30 according to a number ratio of 1. In this embodiment, for the sake of clarity, the sub-pixel units obtained by arranging and combining different pixel groups will be described by taking the reference numerals a, B, and C of the first pixel group 10, the second pixel group 20, and the third pixel group 30 as examples. Since the second pixel group 20 has 4 types of second

sub-pixel groups

201, 202, 203, 204, they are respectively denoted by B1, B2, B3, B4.

For example, referring to fig. 2 (a), the sub-pixel unit 1 is composed of a first pixel group 10 and a third pixel group 30 arranged according to a ratio of 1. The left and right arrangement positions of the first pixel group 10 and the third pixel group 30 can be changed. Either an AC arrangement or a CA arrangement can be obtained. The left and right positions of two different pixel groups are changed, although the aperture ratio of the obtained sub-pixel unit 1 is the same, the arrangement order of the sub-pixels of the obtained two sub-pixel units is different, for example, in the sub-pixel unit 1 formed by the AC arrangement, the sub-pixel immediately adjacent to the first pixel group 10 is 11, so that in the sub-pixel unit 1 formed by the AC arrangement, the sub-pixel shared by the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 is the first sub-pixel 11, and the aperture ratio of the first sub-pixel 11 is increased; in the sub-pixel unit 1 formed by the CA arrangement, the sub-pixel immediately adjacent to the first pixel group 10 is 31, so that in the sub-pixel unit 1 formed by the CA arrangement, the sub-pixel shared by the first sub-pixel 11, the second sub-pixel 21 and the third sub-pixel 31 is the third sub-pixel 31, and the aperture ratio of the third sub-pixel 31 is increased, so that the sub-pixel can be used for changing the service life of a certain sub-pixel after the position change, and simultaneously, the resolution and the image quality can be improved, and the layout of the Photo Spacer (PS) is also facilitated.

Referring to fig. 2 (B), the sub-pixel unit 1 is composed of a first pixel group 10 and second

sub-pixel groups

201, 202, 203, 204 arranged according to a quantity ratio of 1. The left and right arrangement positions of the first pixel group 10 and the second

sub-pixel groups

201, 202, 203, 204 can be changed, so that the matching mode of the sub-pixels of the adjacent pixel groups can be realized through the adjustment of the positions of the pixel groups according to actual conditions to improve the image quality of the picture.

Referring to fig. 2 (C), the sub-pixel unit 1 is composed of a second sub-pixel group 202 and a third pixel group C arranged according to a number ratio of 1. The left and right positions of the second sub-pixel group 202 and the third pixel group 30 can be changed. Either the arrangement of B2C or the arrangement of CB2 can be obtained. It is understood that the sub-pixel units 1 formed by matching B1, B3, B4 in the second pixel group 20 with the third pixel group 30 can be the same.

Referring to fig. 2 (D), the sub-pixel unit 1 is composed of a second sub-pixel group 201 and a second sub-pixel group 202 arranged according to a ratio of 1. The left and right positions of the second sub-pixel group 201 and the second sub-pixel group 202 can be changed. Either the arrangement of B1B2 or the arrangement of B2B1 can be obtained. It is understood that the other sub-pixel units 1 formed by matching B1 with B3 and B4 in the second pixel group 20 can be the same.

The area of each sub-pixel of each pixel group can be adjusted according to the required aperture ratio, and the left and right positions of two different pixel groups constituting the sub-pixel unit 1 can be changed to correct the jaggy feeling at the edge of the sub-pixel unit 1.

The sub-pixel units 1 described above are each configured in a number ratio of 1, and it is understood that the number ratio of the two pixel groups configuring the sub-pixel unit 1 may be set as appropriate.

Example 2

Referring to fig. 3, the sub-pixel unit 110 is formed by a first pixel group 10, a second pixel group 20 and a third pixel group 30 according to the following ratio of 1:1:1 in terms of number ratio. The left and right arrangement positions of the first pixel group 10, the second pixel group 20 and the third pixel group 30 can be changed, and a new sub-pixel unit 1 is obtained after updating.

For example, the sub-pixel unit 110 is a first pixel group 10, a

second sub-pixel group

201, 202, 203, 204, and a third pixel group 30, and each of them is represented by 1:1:1 in terms of the number ratio. In addition, the left and right arrangement positions of the first pixel group 10, the second sub-pixel group 201 and the third pixel group 30 can be changed. The sub-pixel cells 110 of AB1C, AB2C, AB3C, AB4C can be obtained. Other arrangements and combinations are the same, and are not described herein again.

Example 3

Referring to fig. 4, the sub-pixel unit 120 is formed by arranging at least two of the first pixel group 10, the second pixel group 20 and the third pixel group 30 in any other number ratio. The pixel arrangement is a repetition of N sub-pixel units. Specifically, fig. 4 (a) illustrates the first pixel group 10, the first sub-pixel group 201, and the second sub-pixel group 2:1 to the arrangement structure of AB 1A; fig. 4 (B) illustrates the first pixel group 10, the first sub-pixel group 201, and the second sub-pixel group in a ratio of 2:1:1 to the arrangement structure of B1AA B2; fig. 4 (C) also illustrates the first pixel group 10, the second sub-pixel group 202, and the third pixel group 30 in a ratio of 2:1:1 to the arrangement of CAA B2 formed.

It is understood that the sub-pixel units 120 can be other combinations of pixel groups in any number ratio.

Referring to fig. 5, fig. 5 (a) illustrates a Real RGB pixel arrangement in the prior art. For example, the lifetime of the blue sub-pixel is low, and in order to increase the lifetime of the blue sub-pixel, it is necessary to increase the aperture ratio of the blue sub-pixel, that is, to increase the area of the blue sub-pixel, and in order to ensure the resolution of the display panel, the areas of the red sub-pixel and the green sub-pixel are thin, and such a mask is difficult to fabricate.

Fig. 5 (B) illustrates that in the present application, the sub-pixel unit 1 formed by arranging the third pixel group 30 and the second sub-pixel group 202 is an arrangement combination of two pixel groups, and because three sub-pixels of the second sub-pixel group 202 are arranged into two columns, and two sub-pixels are arranged transversely to form one column, the same aperture ratio is achieved for the blue pixels, and the sub-pixel unit 1 can optimize the space of the S region compared with the prior art. The S area can be optimized by each sub-pixel unit, more areas can be optimized by the whole pixel arrangement structure, the optimized areas can be used for arranging more sub-pixel units, and the optimized S areas can be used for providing the sub-pixels with short service life, so that the whole service life of the pixel arrangement structure is greatly prolonged. Moreover, each sub-pixel unit can optimize a certain space to provide for the sub-pixels with short service life, so that each sub-pixel with short service life does not need to be oversized as in the prior art, the area of the sub-pixel with short service life is enlarged, the sub-pixel arrangement of the whole pixel arrangement structure is more harmonious, and the resolution ratio is higher.

To sum up, the present disclosure provides a sub-pixel unit 1, a pixel arrangement structure 2, and a display panel, in which a first sub-pixel 11, a second sub-pixel 21, and a third sub-pixel 31 are utilized to form pixel groups with different arrangement structures, at least two different arrangement structures of the pixel groups can form a plurality of sub-pixel units 1 through various number ratios and different arrangement combinations, and the pixel arrangement structure 2 is a repetition of the sub-pixel units 1, so that the present disclosure provides a brand new pixel arrangement structure 2, which can obtain the pixel arrangement structures 2 with different aperture ratios according to the arrangement of the different arrangement structures of the pixel groups, or adjust the left and right arrangement order and the number ratio of the sub-pixel units 1 under the condition of the same aperture ratio to change the adjacent relationship of the sub-pixels between the pixel groups, thereby reasonably optimizing the layout of the pixels. The optimized space area can be added to the rest of the sub-pixels in a shape changing mode, and the fast attenuation brightness of the rest of the sub-pixels is compensated in a mode of increasing the aperture ratio of the rest of the sub-pixels, so that the brightness attenuation difference among the sub-pixels is balanced, and the service life of the display device is prolonged.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. A sub-pixel cell, comprising: the pixel array comprises a first pixel group, a second pixel group and a third pixel group, wherein the first pixel group, the second pixel group and the third pixel group are arranged along a row direction;

the first pixel group, the second pixel group and the third pixel group respectively comprise a first sub-pixel, a second sub-pixel and a third sub-pixel, the number ratio of the first sub-pixel to the second sub-pixel to the third sub-pixel is 1;

the first sub-pixel, the second sub-pixel and the third sub-pixel in the third pixel group are respectively arranged in parallel and form a structure of three rows and one column; wherein the content of the first and second substances,

the overall length of the first pixel group, the overall length of the second pixel group, and the overall length of the third pixel group are all the same.

2. The sub-pixel unit according to claim 1, wherein one of the sub-pixels of the three colors in the second pixel group is shared by itself in one column, and the other two sub-pixels are arranged above and below one side of the one sub-pixel in the other column; or one of the sub-pixels of the three colors in the second pixel group, which are shared, is self-aligned in a row, and the other two sub-pixels are arranged in the left and right direction on one side of the sub-pixel and are in another row.

3. The sub-pixel unit according to claim 2, wherein, of the at least two second pixel groups constituting the sub-pixel unit, a sub-pixel shared by a first one of the second pixel groups has a different position in the second pixel group than a sub-pixel shared by another one of the second pixel groups.

4. The sub-pixel unit of claim 1, wherein the area of the sub-pixel shared by the second pixel group is larger than the sum of the areas of the other two sub-pixels.

5. The sub-pixel unit of claim 1, wherein the first, second and third sub-pixels are configured to emit different colors of light.

6. The sub-pixel cell of claim 1, wherein the first, second, and third sub-pixels are each configured to emit one of red, green, or blue light.

7. The sub-pixel unit according to claim 1, wherein any one of the first sub-pixel, the second sub-pixel, and the third sub-pixel has a regular shape or an irregular shape.

8. A pixel arrangement, comprising: a plurality of subpixel repeating units, wherein said subpixel repeating unit is according to any one of claims 1-7.

9. A display panel, comprising: a substrate and the pixel arrangement as claimed in claim 8 disposed thereon.