Display substrate and display device

Abstract

The embodiment of the invention provides a display substrate and a display device. The display substrate comprises a plurality of pixel units. For each pixel unit, the pixel unit comprises sub-pixels of N primary colors; n is an integer greater than 3; wherein the primary color wavelengths of the sub-pixels in the same pixel unit are different. By increasing the number of primary colors of the pixel unit (the increased number of primary colors is greater than the RGB three primary colors), the multi-primary-color pixel unit is realized, and the color gamut coverage rate of the display system is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display substrate and a display device. Background Art

[0002] In current display systems, in order to improve the visual effect of the display screen, RGB (red, green, and blue primary colors) plus W (white light) is usually mixed, or RGB plus Y (yellow light) is mixed to enhance the color expression of the display screen. However, RGBW and RGBY can only increase the brightness of the display system, but cannot improve the color gamut coverage of the display system. Therefore, how to improve the color gamut coverage of the display system is still a problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a display substrate and a display device to improve the color gamut coverage of the display system. The specific technical solution is as follows:

[0004] In a first aspect, an embodiment of the present application provides a display substrate, wherein the display substrate comprises a plurality of pixel units;

[0005] For each pixel unit, the pixel unit includes sub-pixels of N primary colors; N is an integer greater than 3;

[0006] The primary color wavelengths of the sub-pixels in the same pixel unit are all different.

[0007] In a possible implementation, the sub-pixel includes a light-emitting structure, a first photoresist layer, and a polarizer;

[0008] The first photoresist layer is disposed on the light emitting structure, and the polarizer is disposed on a side of the first photoresist layer away from the light emitting structure.

[0009] In a possible implementation manner, the pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel;

[0010] A distance between two reflective mirrors of the first G primary color sub-pixel is different from a distance between two reflective mirrors of the second G primary color sub-pixel.

[0011] In a possible implementation manner, the pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel;

[0012] The first photoresist layer includes a G primary color filter film;

[0013] The orthographic projections of the G primary color filter film and the light emitting structure of the second G primary color sub-pixel on the plane of the polarizer have no overlapping parts, the orthographic projections of the G primary color filter film and the light emitting structure of the R primary color sub-pixel on the plane of the polarizer have no overlapping parts, and the orthographic projections of the G primary color filter film and the light emitting structure of the B primary color sub-pixel on the plane of the polarizer have no overlapping parts;

[0014] The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the polarizer plane is included in the orthographic projection of the G primary color filter film on the polarizer plane;

[0015] The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

[0016] In a possible implementation manner, the pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, a first R primary color sub-pixel, and a second R primary color sub-pixel;

[0017] The distance between the two reflectors of the first G primary color sub-pixel is different from the distance between the two reflectors of the second G primary color sub-pixel;

[0018] A distance between two reflective mirrors of the first R primary color sub-pixel is different from a distance between two reflective mirrors of the second R primary color sub-pixel.

[0019] In a possible implementation, the sub-pixel includes a light-emitting structure, a color filter layer, and a second photoresist layer;

[0020] The color filter layer is disposed on the light emitting structure, and the second photoresist layer is disposed on a side of the color filter layer away from the light emitting structure.

[0021] In a possible implementation, the color filter layer includes a G primary color filter film, a B primary color filter film, and an R primary color filter film;

[0022] The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel;

[0023] The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane;

[0024] A distance between two reflective mirrors of the first G primary color sub-pixel is different from a distance between two reflective mirrors of the second G primary color sub-pixel.

[0025] In a possible implementation, the color filter layer includes a first G primary color filter film, a second G primary color filter film, a B primary color filter film, and an R primary color filter film;

[0026] The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel;

[0027] The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the first G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the second G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane;

[0028] The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

[0029] In a possible implementation, the color filter layer includes a G primary color filter film and a gray photoresist film;

[0030] The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel;

[0031] The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane;

[0032] The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

[0033] In a possible implementation, the color filter layer includes a G primary color filter film, a B primary color filter film, and an R primary color filter film;

[0034] The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, a first R primary color sub-pixel, and a second R primary color sub-pixel;

[0035] The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the first R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the second R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane;

[0036] The distance between the two reflectors of the first G primary color sub-pixel is different from the distance between the two reflectors of the second G primary color sub-pixel;

[0037] A distance between two reflective mirrors of the first R primary color sub-pixel is different from a distance between two reflective mirrors of the second R primary color sub-pixel.

[0038] In a second aspect, an embodiment of the present application provides a display device, comprising a display substrate as described in any one of the above-mentioned first aspects.

[0039] Beneficial effects of the embodiments of the present application:

[0040] The embodiment of the present application provides a display substrate and a display device, wherein the display substrate includes a plurality of pixel units; for each pixel unit, the pixel unit includes sub-pixels of N primary colors; N is an integer greater than 3; wherein the wavelengths of the primary colors of each sub-pixel in the same pixel unit are different. By increasing the number of primary colors of the pixel unit (the number of primary colors after the increase is greater than the three primary colors of RGB), a multi-primary color pixel unit is realized, thereby improving the color gamut coverage of the display system.

[0041] Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0043] Figure 1a Schematic diagram of wavelength distribution of RGB three primary colors in related technology;

[0044] Figure 1b This is a schematic diagram comparing the color gamut coverage of RGB three primary colors and RGGB four primary colors;

[0045] Figure 2 A schematic diagram of a first structure of a display substrate provided in an embodiment of the present application;

[0046] Figure 3 A second structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0047] Figure 4 Schematic diagram of the wavelength distribution of the four primary colors of the RGGB four primary color pixel unit;

[0048] Figure 5 A third structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0049] Figure 6 A fourth structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0050] Figure 7 A fifth structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0051] Figure 8 A sixth structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0052] Fig. 9 A seventh structural schematic diagram of a display substrate provided in an embodiment of the present application;

[0053] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0055] In current display systems, in order to improve the visual effect of the display screen, RGB (the three primary colors of red, green, and blue) plus W (white light) is usually mixed, or RGB plus Y (yellow light) is mixed to enhance the color expression of the display screen. However, since both white light and yellow light can be obtained by mixing the three primary colors of RGB, and neither white light nor yellow light is a primary color (a primary color is defined as a primary color that cannot be mixed with other primary colors), RGBW and RGBY can only increase the brightness of the display system, but cannot improve the color gamut coverage of the display system (the color gamut coverage refers to the proportion of the color range that can be covered by a color space to the entire color space. The higher the color gamut coverage, the wider the color range that the display system can output and the richer the colors presented).

[0056] In order to improve the above problem, the color gamut coverage is improved in the related art by setting the color coordinates of the primary colors as close to the color gamut boundary as possible. However, the theoretical maximum coverage of the triangular plane color gamut composed of the three RGB primary colors can only reach 73%.

[0057] In summary, how to improve the color gamut coverage of the display system is still a problem that needs to be solved urgently.

[0058] In order to improve at least one of the above problems, embodiments of the present application provide a display substrate and a display device.

[0059] Next, the display substrate provided in the embodiment of the present application is described in detail. The display substrate 1 includes a plurality of pixel units 11;

[0060] For each pixel unit 11, the pixel unit 11 includes sub-pixels 111 of N primary colors; N is an integer greater than 3;

[0061] The primary color wavelengths of the sub-pixels 111 in the same pixel unit 11 are all different.

[0062] Each pixel unit 11 may include sub-pixels 111 of four primary colors (four primary colors), each pixel unit 11 may include sub-pixels 111 of five primary colors (five primary colors), each pixel unit 11 may also include sub-pixels 111 of six primary colors (six primary colors), etc., which is not specifically limited in the present application.

[0063] According to the correspondence between wavelength and color, different wavelengths correspond to different colors, such as Figure 1a As shown, therefore, when the wavelength of the R primary color changes, it is no longer the original red light, but becomes a new color component. Similarly, when the wavelength of the G primary color changes, it is no longer the original green light, but becomes a new color component. When the wavelength of the B primary color changes, it is no longer the original blue light, but becomes a new color component. And this new color component cannot be obtained by mixing the original RGB three primary colors in a certain proportion.

[0064] Figure 1a In the figure, the horizontal axis represents the wavelength in nanometers, and the vertical axis represents the absorbance.

[0065] In an example, based on the original R primary color sub-pixel, G primary color sub-pixel, and B primary color sub-pixel, a G primary color sub-pixel can be added, and a new primary color sub-pixel can be obtained by changing the wavelength of the added G primary color sub-pixel, thereby realizing a four-primary color pixel unit. Figure 1b Compared with the three-primary color pixel unit, the four-primary color pixel unit can improve the color gamut coverage.

[0066] In an example, a B primary color sub-pixel can be added based on the original R primary color sub-pixel, G primary color sub-pixel, and B primary color sub-pixel, and a new primary color sub-pixel can be obtained by changing the wavelength of the added B primary color sub-pixel, thereby realizing a four-primary color pixel unit and improving the color gamut coverage.

[0067] In an example, an R primary color sub-pixel can be added based on the original R primary color sub-pixel, G primary color sub-pixel, and B primary color sub-pixel, and a new primary color sub-pixel can be obtained by changing the wavelength of the added R primary color sub-pixel, thereby realizing a four-primary color pixel unit and improving the color gamut coverage.

[0068] The contribution of the three RGB primary colors to the color gamut coverage is ranked as follows: G primary color > R primary color > B primary color, that is, among the three RGB primary colors, the G primary color contributes the most to the color gamut area. Therefore, the four-primary color method of "adding another G primary color sub-pixel and obtaining a new primary color sub-pixel by changing the wavelength of the added G primary color sub-pixel" is selected. Compared with the other four-primary color methods mentioned above, the color gamut coverage is improved best.

[0069] In the embodiment of the present application, by increasing the number of primary colors of the pixel unit (the increased number of primary colors is greater than the three primary colors of RGB), a multi-primary color pixel unit is realized, the color gamut coverage of the display system is improved, the color range and richness of the displayed picture are expanded, the color expression of the displayed picture is improved, and the visual effect of the displayed picture is improved.

[0070] In one possible implementation, see Figure 2 , the sub-pixel 111 includes a light emitting structure 1111, a first photoresist layer 1112, and a polarizer 1113;

[0071] The first photoresist layer 1112 is disposed on the light emitting structure 1111 , and the polarizer 1113 is disposed on a side of the first photoresist layer 1112 away from the light emitting structure 1111 .

[0072] Figure 2 The sub-pixel 111 structure shown in the figure is a structure based on POL technology (ie, circular polarizer technology, which solves the problem of ambient light reflection by adding a layer of circular polarizer outside the display screen).

[0073] In a possible implementation, based on POL technology, see Figure 3 , the pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, and an R primary color sub-pixel 111;

[0074] The distance between the two reflective mirrors of the first G primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second G primary color sub-pixel 111 .

[0075] A FP resonant cavity (the full name is Fabry-Perot resonant cavity, also known as a plane parallel cavity, which is a type of optical resonant cavity composed of two parallel plane mirrors) is formed between the cathode and anode of the light-emitting structure 1111 of the sub-pixel 111. The wavelength of the sub-pixel 111 can be changed by changing the cavity length of the FP resonant cavity (the distance between the two mirrors, the cathode and the anode).

[0076] The second G primary color sub-pixel is the original G primary color sub-pixel. Based on the original R primary color sub-pixel, G primary color sub-pixel (second G primary color sub-pixel), and B primary color sub-pixel, another G primary color sub-pixel is added, and the wavelength of the added G primary color sub-pixel is changed by changing the cavity length of the FP resonant cavity of the added G primary color sub-pixel, so as to obtain a new primary color sub-pixel, namely the first G primary color sub-pixel, thereby realizing a four-primary color pixel unit.

[0077] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and a four-primary color pixel unit (RGGB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the displayed picture, improving the color expression of the displayed picture, and improving the visual effect of the displayed picture.

[0078] In a possible implementation, based on the POL technology, the pixel unit 11 includes a G primary color sub-pixel 111, a first B primary color sub-pixel 111, a second B primary color sub-pixel 111, and an R primary color sub-pixel 111; the distance between the two reflectors of the first B primary color sub-pixel 111 is different from the distance between the two reflectors of the second B primary color sub-pixel 111.

[0079] In the embodiment of the present application, by setting the distance between the two reflectors of the first B primary color sub-pixel 111 to be different from the distance between the two reflectors of the second B primary color sub-pixel 111, the wavelengths of the first B primary color sub-pixel 111 and the second B primary color sub-pixel 111 are different, and a four-primary color pixel unit (RGBB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the displayed picture, improving the color expression of the displayed picture, and improving the visual effect of the displayed picture.

[0080] In a possible implementation, based on the POL technology, the pixel unit 11 includes a G primary color sub-pixel 111, a B primary color sub-pixel 111, a first R primary color sub-pixel 111, and a second R primary color sub-pixel 111; the distance between the two reflectors of the first R primary color sub-pixel 111 is different from the distance between the two reflectors of the second R primary color sub-pixel 111.

[0081] In the embodiment of the present application, by setting the distance between the two reflectors of the first R primary color sub-pixel 111 to be different from the distance between the two reflectors of the second R primary color sub-pixel 111, the wavelengths of the first R primary color sub-pixel 111 and the second R primary color sub-pixel 111 are different, and a four-primary color pixel unit (RRGB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the displayed picture, improving the color expression of the displayed picture, and improving the visual effect of the displayed picture.

[0082] In a possible implementation, based on POL technology, see Figure 5 , the pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, and an R primary color sub-pixel 111;

[0083] The first photoresist layer 1112 includes a G primary color filter film 11151;

[0084] The orthographic projections of the G primary color filter film 11151 and the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the polarizer 1113 have no overlapping parts, the orthographic projections of the G primary color filter film 11151 and the light emitting structure 1111 of the R primary color sub-pixel 111 on the plane of the polarizer 1113 have no overlapping parts, and the orthographic projections of the G primary color filter film 11151 and the light emitting structure 1111 of the B primary color sub-pixel 111 on the plane of the polarizer 1113 have no overlapping parts;

[0085] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the polarizer 1113 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the polarizer 1113;

[0086] The distance between the two reflective mirrors of the first G primary color sub-pixel 111 is the same as the distance between the two reflective mirrors of the second G primary color sub-pixel 111 .

[0087] The second G primary color sub-pixel is the original G primary color sub-pixel. Based on the original R primary color sub-pixel, G primary color sub-pixel (second G primary color sub-pixel), and B primary color sub-pixel, another G primary color sub-pixel is added, and by setting a G primary color filter film 11151 in the added G primary color sub-pixel and changing the wavelength of the added G primary color sub-pixel, a new primary color sub-pixel, i.e., the first G primary color sub-pixel, is obtained, thereby realizing a four-primary color pixel unit.

[0088] In the embodiment of the present application, by setting a G primary color filter film 11151, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and a four-primary color pixel unit (RGGB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the display picture, improving the color expression of the display picture, and improving the visual effect of the display picture.

[0089] By setting the primary color filter film, the RRGB four-primary color pixel unit and the RGBB four-primary color pixel unit based on the POL technology can also be realized. The principle is the same as the realization of the above-mentioned RGGB four-primary color pixel unit, and this application will not go into details here.

[0090] In a possible implementation, based on the POL technology, the pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, a first R primary color sub-pixel 111, and a second R primary color sub-pixel 111;

[0091] The distance between the two reflectors of the first G primary color sub-pixel 111 is different from the distance between the two reflectors of the second G primary color sub-pixel 111;

[0092] The distance between the two reflective mirrors of the first R primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second R primary color sub-pixel 111 .

[0093] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, and the distance between the two reflectors of the first R primary color sub-pixel 111 to be different from the distance between the two reflectors of the second R primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and the wavelengths of the first R primary color sub-pixel 111 and the second R primary color sub-pixel 111 are different, so as to realize a five-primary color pixel unit (RRGGB). Compared with the four-primary color pixel unit, the five-primary color pixel unit can further improve the color gamut coverage of the display system, expand the color range and richness of the displayed picture, enhance the color expression of the displayed picture, and enhance the visual effect of the displayed picture.

[0094] In a possible implementation, based on the POL technology, the pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a first B primary color sub-pixel 111, a second B primary color sub-pixel 111, a first R primary color sub-pixel 111, and a second R primary color sub-pixel 111;

[0095] The distance between the two reflectors of the first G primary color sub-pixel 111 is different from the distance between the two reflectors of the second G primary color sub-pixel 111;

[0096] The distance between the two reflectors of the first R primary color sub-pixel 111 is different from the distance between the two reflectors of the second R primary color sub-pixel 111;

[0097] The distance between the two reflective mirrors of the first B primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second B primary color sub-pixel 111 .

[0098] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, the distance between the two reflectors of the first R primary color sub-pixel 111 to be different from the distance between the two reflectors of the second R primary color sub-pixel 111, and the distance between the two reflectors of the first B primary color sub-pixel 111 to be different from the distance between the two reflectors of the second B primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, the wavelengths of the first R primary color sub-pixel 111 and the second R primary color sub-pixel 111 are different, and the wavelengths of the first B primary color sub-pixel 111 and the second B primary color sub-pixel 111 are different, so as to realize a six-primary color pixel unit (RRGGBB). Compared with the five-primary color pixel unit, the six-primary color pixel unit can further improve the color gamut coverage of the display system, expand the color range and richness of the displayed picture, enhance the color expression of the displayed picture, and enhance the visual effect of the displayed picture.

[0099] By setting the primary color filter film, the RRGGB five-primary color pixel unit and the RRGGBB six-primary color pixel unit based on the POL technology can also be realized. The principle is the same as the realization of the above-mentioned RGGB four-primary color pixel unit, and this application will not go into details here.

[0100] In one possible implementation, see Figure 6 , the sub-pixel 111 includes a light emitting structure 1111, a color filter layer 1115, and a second photoresist layer 1116;

[0101] The color filter layer 1115 is disposed on the light emitting structure 1111 , and the second photoresist layer 1116 is disposed on a side of the color filter layer 1115 away from the light emitting structure 1111 .

[0102] Figure 6 The sub-pixel 111 structure shown in FIG. 1 is a structure based on COE technology (ie, Color On Encapsulation technology, which is a non-polarized display technology).

[0103] The color filter layer 1115 includes a black matrix and a plurality of primary color filter films. For each primary color filter film, the primary color filter film is disposed in an opening gap of the black matrix.

[0104] In a possible implementation, based on COE technology, see Figure 7 The color filter layer 1115 includes a G primary color filter film 11151, a B primary color filter film 11152, and an R primary color filter film 11153;

[0105] The pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, and an R primary color sub-pixel 111;

[0106] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the B primary color filter film 11152 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116;

[0107] The distance between the two reflective mirrors of the first G primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second G primary color sub-pixel 111 .

[0108] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and a four-primary color pixel unit (RGGB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the displayed picture, improving the color expression of the displayed picture, and improving the visual effect of the displayed picture.

[0109] By changing the cavity length of the FP resonant cavity, the RRGB four-primary color pixel unit and the RGBB four-primary color pixel unit based on the COE technology can also be realized. The principle is the same as the realization of the RGGB four-primary color pixel unit based on the COE technology, and this application will not go into details here.

[0110] In a possible implementation, based on COE technology, see Figure 8 The color filter layer 1115 includes a first G primary color filter film 11154, a second G primary color filter film 11155, a B primary color filter film 11152, and an R primary color filter film 11153;

[0111] The pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, and an R primary color sub-pixel 111;

[0112] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the first G primary color filter film 11154 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the second G primary color filter film 11155 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the B primary color filter film 11152 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116;

[0113] The distance between the two reflective mirrors of the first G primary color sub-pixel 111 is the same as the distance between the two reflective mirrors of the second G primary color sub-pixel 111 .

[0114] In the embodiment of the present application, by setting different first G primary color filters 11154 and second G primary color filters 11155, different wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are achieved, and a four-primary color pixel unit (RGGB) is realized, thereby improving the color gamut coverage of the display system, expanding the color range and richness of the display image, improving the color expression of the display image, and improving the visual effect of the display image.

[0115] By setting different primary color filter films, RRGB four-primary color pixel units and RGBB four-primary color pixel units based on COE technology can also be realized. The principle is the same as the realization of RGGB four-primary color pixel units based on COE technology, and this application will not go into details here.

[0116] In a possible implementation, based on COE technology, see Fig. 9 , the color filter layer 1115 includes a G primary color filter film 11151 and a gray photoresist film 11156;

[0117] The pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, and an R primary color sub-pixel 111;

[0118] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the gray photoresist film 11156 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the gray photoresist film 11156 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the gray photoresist film 11156 on the plane of the second photoresist layer 1116;

[0119] The distance between the two reflective mirrors of the first G primary color sub-pixel 111 is the same as the distance between the two reflective mirrors of the second G primary color sub-pixel 111 .

[0120] Figure 8 In the structural arrangement shown, the filter film of the color filter layer 1115 has four masks, which greatly increases the process steps and complicates the process flow. Fig. 9 In the structural arrangement shown, the color filter of the original RGB three-primary color sub-pixel adopts a gray photoresist film 11156, and the filter part of the fourth primary color sub-pixel (the first G primary color sub-pixel 111) adopts a G primary color filter film 11151, so that the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and only two masks are needed, which simplifies the process flow. Of course, the method of using the gray photoresist film 11156 to reduce the mask is also applicable to the RRGGB five-primary color pixel unit and the RRGGBB six-primary color pixel unit.

[0121] In the embodiment of the present application, the color filter of the original RGB three-primary color sub-pixel adopts a gray photoresist film 11156, and the filtering part of the fourth primary color sub-pixel (the first G primary color sub-pixel 111) adopts a G primary color filter film 11151, so that the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and only two masks are needed, which simplifies the process flow.

[0122] In a possible implementation, based on the COE technology, the color filter layer 1115 includes a G primary color filter film 11151, a B primary color filter film 11152, and an R primary color filter film 11153;

[0123] The pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a B primary color sub-pixel 111, a first R primary color sub-pixel 111, and a second R primary color sub-pixel 111;

[0124] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116. The orthographic projection of the light emitting structure 1111 of the first R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the B primary color filter film 11152 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the first R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the second R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116;

[0125] The distance between the two reflectors of the first G primary color sub-pixel 111 is different from the distance between the two reflectors of the second G primary color sub-pixel 111;

[0126] The distance between the two reflective mirrors of the first R primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second R primary color sub-pixel 111 .

[0127] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, and the distance between the two reflectors of the first R primary color sub-pixel 111 to be different from the distance between the two reflectors of the second R primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, and the wavelengths of the first R primary color sub-pixel 111 and the second R primary color sub-pixel 111 are different, so as to realize a five-primary color pixel unit (RRGGB). Compared with the four-primary color pixel unit, the five-primary color pixel unit can further improve the color gamut coverage of the display system, expand the color range and richness of the displayed picture, enhance the color expression of the displayed picture, and enhance the visual effect of the displayed picture.

[0128] In a possible implementation, based on the COE technology, the color filter layer 1115 includes a G primary color filter film 11151, a B primary color filter film 11152, and an R primary color filter film 11153;

[0129] The pixel unit 11 includes a first G primary color sub-pixel 111, a second G primary color sub-pixel 111, a first B primary color sub-pixel 111, a second B primary color sub-pixel 111, a first R primary color sub-pixel 111, and a second R primary color sub-pixel 111;

[0130] The orthographic projection of the light emitting structure 1111 of the first G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the second G primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the G primary color filter film 11151 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the first B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the B primary color filter film 11152 on the plane of the second photoresist layer 1116. The orthographic projection of the light emitting structure 1111 of the second B primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the B primary color filter film 11152 on the plane of the second photoresist layer 1116, the orthographic projection of the light emitting structure 1111 of the first R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116, and the orthographic projection of the light emitting structure 1111 of the second R primary color sub-pixel 111 on the plane of the second photoresist layer 1116 is included in the orthographic projection of the R primary color filter film 11153 on the plane of the second photoresist layer 1116;

[0131] The distance between the two reflectors of the first G primary color sub-pixel 111 is different from the distance between the two reflectors of the second G primary color sub-pixel 111;

[0132] The distance between the two reflectors of the first R primary color sub-pixel 111 is different from the distance between the two reflectors of the second R primary color sub-pixel 111;

[0133] The distance between the two reflective mirrors of the first B primary color sub-pixel 111 is different from the distance between the two reflective mirrors of the second B primary color sub-pixel 111 .

[0134] In the embodiment of the present application, by setting the distance between the two reflectors of the first G primary color sub-pixel 111 to be different from the distance between the two reflectors of the second G primary color sub-pixel 111, the distance between the two reflectors of the first R primary color sub-pixel 111 to be different from the distance between the two reflectors of the second R primary color sub-pixel 111, and the distance between the two reflectors of the first B primary color sub-pixel 111 to be different from the distance between the two reflectors of the second B primary color sub-pixel 111, the wavelengths of the first G primary color sub-pixel 111 and the second G primary color sub-pixel 111 are different, the wavelengths of the first R primary color sub-pixel 111 and the second R primary color sub-pixel 111 are different, and the wavelengths of the first B primary color sub-pixel 111 and the second B primary color sub-pixel 111 are different, so as to realize a six-primary color pixel unit (RRGGBB). Compared with the five-primary color pixel unit, the six-primary color pixel unit can further improve the color gamut coverage of the display system, expand the color range and richness of the displayed picture, enhance the color expression of the displayed picture, and enhance the visual effect of the displayed picture.

[0135] By setting different primary color filter films, the RRGGB five-primary color pixel unit and the RRGGBB six-primary color pixel unit based on COE technology can also be realized. The principle is the same as the realization of the RGGB four-primary color pixel unit based on COE technology, and this application will not go into details here.

[0136] In one example, the schematic diagram of the wavelength distribution of the four primary colors of the RGGB four primary color pixel unit in this application can be found in Figure 4 , wherein the wavelength of the second G primary color sub-pixel 111 is 535nm, and the wavelength of the first G primary color sub-pixel 111 is 520nm. The comparison between the four primary color wavelengths of the RGGB four-primary color pixel unit in the present application and the original RGB three-primary color wavelengths is shown in Table 1 below:

[0137] Table 1

[0138] R primary color sub-pixel The second G primary color sub-pixel The first G primary color sub-pixel B primary color sub-pixel unit Three primary colors 625 535 463 nanometer Four primary colors 625 535 520 463 nanometer

[0139] Compared with the original RGB three-primary color pixel unit, the RGGB four-primary color pixel unit in the present application increases the planar color gamut coverage of the display system by 8% and the stereoscopic color gamut coverage by 12%.

[0140] Figure 4 In the figure, the horizontal axis represents the wavelength in nanometers, and the vertical axis represents the absorbance. Figure 4 , primary color 1R represents an R primary color sub-pixel, primary color 2G1 represents a first G primary color sub-pixel, primary color 3G2 represents a second G primary color sub-pixel, and primary color 4B represents a B primary color sub-pixel.

[0141] The present application also provides a display device 2, see Fig.10, the display device 2 includes the display substrate 1 described in any one of the above embodiments.

[0142] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0143] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0144] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A display substrate, characterized in that: The display substrate includes a plurality of pixel units; For each pixel unit, the pixel unit includes sub-pixels of N primary colors; N is an integer greater than 3; The primary color wavelengths of the sub-pixels in the same pixel unit are all different.

2. The display substrate according to claim 1, characterized in that: The sub-pixel includes a light-emitting structure, a first photoresist layer, and a polarizer; The first photoresist layer is disposed on the light emitting structure, and the polarizer is disposed on a side of the first photoresist layer away from the light emitting structure.

3. The display substrate according to claim 2, characterized in that: The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel; A distance between two reflective mirrors of the first G primary color sub-pixel is different from a distance between two reflective mirrors of the second G primary color sub-pixel.

4. The display substrate according to claim 2, characterized in that: The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel; The first photoresist layer includes a G primary color filter film; The orthographic projections of the G primary color filter film and the light emitting structure of the second G primary color sub-pixel on the plane of the polarizer have no overlapping parts, the orthographic projections of the G primary color filter film and the light emitting structure of the R primary color sub-pixel on the plane of the polarizer have no overlapping parts, and the orthographic projections of the G primary color filter film and the light emitting structure of the B primary color sub-pixel on the plane of the polarizer have no overlapping parts; The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the polarizer plane is included in the orthographic projection of the G primary color filter film on the polarizer plane; The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

5. The display substrate according to claim 2, characterized in that: The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, a first R primary color sub-pixel, and a second R primary color sub-pixel; The distance between the two reflectors of the first G primary color sub-pixel is different from the distance between the two reflectors of the second G primary color sub-pixel; A distance between two reflective mirrors of the first R primary color sub-pixel is different from a distance between two reflective mirrors of the second R primary color sub-pixel.

6. The display substrate according to claim 1, characterized in that: The sub-pixel includes a light-emitting structure, a color filter layer, and a second photoresist layer; The color filter layer is disposed on the light emitting structure, and the second photoresist layer is disposed on a side of the color filter layer away from the light emitting structure.

7. The display substrate according to claim 6, characterized in that: The color filter layer includes a G primary color filter film, a B primary color filter film, and an R primary color filter film; The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel; The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane; A distance between two reflective mirrors of the first G primary color sub-pixel is different from a distance between two reflective mirrors of the second G primary color sub-pixel.

8. The display substrate according to claim 6, characterized in that: The color filter layer includes a first G primary color filter film, a second G primary color filter film, a B primary color filter film, and an R primary color filter film; The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel; The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the first G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the second G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane; The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

9. The display substrate according to claim 6, characterized in that: The color filter layer includes a G primary color filter film and a gray photoresist film; The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, and an R primary color sub-pixel; The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the gray photoresist film on the second photoresist layer plane; The distance between the two reflectors of the first G primary color sub-pixel is the same as the distance between the two reflectors of the second G primary color sub-pixel.

10. The display substrate according to claim 6, characterized in that: The color filter layer includes a G primary color filter film, a B primary color filter film, and an R primary color filter film; The pixel unit includes a first G primary color sub-pixel, a second G primary color sub-pixel, a B primary color sub-pixel, a first R primary color sub-pixel, and a second R primary color sub-pixel; The orthographic projection of the light emitting structure of the first G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the second G primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the G primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the B primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the B primary color filter film on the second photoresist layer plane, the orthographic projection of the light emitting structure of the first R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane, and the orthographic projection of the light emitting structure of the second R primary color sub-pixel on the second photoresist layer plane is included in the orthographic projection of the R primary color filter film on the second photoresist layer plane; The distance between the two reflectors of the first G primary color sub-pixel is different from the distance between the two reflectors of the second G primary color sub-pixel; A distance between two reflective mirrors of the first R primary color sub-pixel is different from a distance between two reflective mirrors of the second R primary color sub-pixel.

11. A display device, characterized in that: The display device comprises the display substrate described in any one of claims 1 to 10.

Images