Display substrate and display device

Abstract

The invention provides a display substrate and a display device. In the display substrate, under a viewing angle A and a viewing angle B, the brightness of a first sub-pixel and the brightness of a second sub-pixel meet the following relational expression: (YRLA + YRLB) * B-A / 2-(YGLA + YGLB) * B-A / 2 = S0, wherein the YRLA and the YGLA are respectively the brightness of the first sub-pixel and the second sub-pixel under the view angle A, and the YRLB and the YGLB are respectively the brightness of the first sub-pixel and the second sub-pixel under the view angle B; the viewing angle A and the viewing angle B are both negative viewing angles or both positive viewing angles, 0 lt; alt; blt; a is smaller than or equal to 45 degrees, B-A is smaller than or equal to 15 degrees, and S0 is smaller than or equal to 1.60, so that the brightness difference of sub-pixels emitting light of different colors is reduced, color cast is relieved or avoided, and the display effect is improved.

Description

Display substrate and display device Technical Field

[0001] At least one embodiment of the present disclosure relates to a display substrate and a display device. Background Art

[0002] With the rapid development of technology, display media has become an important part of people's lives. Organic light-emitting diode (OLED) displays have excellent color and image quality due to their self-luminous properties.

[0003] Summary of the Invention

[0004] At least one embodiment of the present disclosure provides a display substrate and a display device.

[0005] An embodiment of the present disclosure provides a display substrate, comprising: a base substrate; and a plurality of sub-pixels, including a first sub-pixel and a second sub-pixel, wherein the first sub-pixel is configured to emit a first color light, and the second sub-pixel is configured to emit a second color light different from the first color light; the first sub-pixel includes a first light-emitting device, and the second sub-pixel includes a second light-emitting device, wherein the size of the first light-emitting device in a direction perpendicular to the base substrate is greater than the size of the second light-emitting device in a direction perpendicular to the base substrate, and at viewing angles A and B, the brightness of the first sub-pixel and the brightness of the second sub-pixel satisfy the following relationship: (YRL A+YRLB)×|BA| / 2-(YGLA+YGLB)×|BA| / 2=S0; wherein S0 is a color shift evaluation parameter at viewing angles A and B, YRLA and YGLA are the brightness of the first sub-pixel and the second sub-pixel, respectively, at viewing angle A, and YRLB and YGLB are the brightness of the first sub-pixel and the second sub-pixel, respectively, at viewing angle B; in the above relationship, the brightness of the first sub-pixel is the normalized brightness, and the brightness of the second sub-pixel is the normalized brightness; viewing angles A and B are both negative or positive, 0<|A|<|B|<45°, |BA|≤15°, and S0≤1.60.

[0006] For example, 0.20≤S0≤0.90.

[0007] For example, at a viewing angle where the absolute value of the viewing angle is less than or equal to 30°, |YGL1-YRL1| / |YGL2-YRL2|=LA, |YGR1-YRR1| / |YGR2-YRR2|=RA, and |RA-LA|≤0.47, where LA is the color shift evaluation parameter at the left viewing angle, RA is the color shift evaluation parameter at the right viewing angle, YRL1 and YRL2 are the brightness of the first sub-pixel at viewing angles of -15° and -30° respectively, YRR1 and YRR2 are the brightness of the first sub-pixel at viewing angles of 15° and 30° respectively, YGL1 and YGL2 are the brightness of the second sub-pixel at viewing angles of -15° and -30° respectively, and YGR1 and YGR2 are the brightness of the second sub-pixel at viewing angles of 15° and 30° respectively.

[0008] For example, at a viewing angle where the absolute value of the viewing angle is greater than or equal to 60°, |YGL3-YRL3|=YAL1, and |YGL4-YRL4|=YAL2, |YGR3-YRR3|=YAR1, and |YGR4-YRR4|=YAR2, the value range of |YAL1 / YAR1| is 0.5-1.2, and the value range of |YAL2 / YAR2| is 0.5-1.2, YAL1 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of -60°, and YAL2 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of -75°. Difference, YAR1 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of 60°, YAR2 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of 75°, YRL3 and YRL4 are the brightness of the first sub-pixel at viewing angles of -60° and -75° respectively, YRR3 and YRR4 are the brightness of the first sub-pixel at viewing angles of 60° and 75° respectively, YGL3 and YGL4 are the brightness of the second sub-pixel at viewing angles of -60° and -75° respectively, YGR3 and YGR4 are the brightness of the second sub-pixel at viewing angles of 60° and 75° respectively.

[0009] For example, the display substrate further includes a light extraction layer, which is configured to extract light emitted by the plurality of sub-pixels. The light extraction layer is located on a side of the plurality of sub-pixels away from the base substrate, and the thickness of the light extraction layer is

[0010] For example, the light extraction layer includes a first light extraction layer and a second light extraction layer, the first light extraction layer is closer to the base substrate than the second light extraction layer, and the thickness of the first light extraction layer is The thickness of the second light extraction layer is

[0011] For example, the plurality of sub-pixels further include a third sub-pixel including a third light-emitting device, and the third sub-pixel is configured to emit a third color light that is different from the first color light and the second color light.

[0012] For example, the display substrate further includes an encapsulation layer configured to encapsulate the first light emitting device, the second light emitting device, and the third light emitting device.

[0013] For example, the display substrate further includes a color filter structure, which is located on the side of the encapsulation layer away from the base substrate. The color filter structure includes a black matrix and a filter layer, the black matrix has a first opening, a second opening, and a third opening, the filter layer includes a first filter portion, a second filter portion, and a third filter portion, the first filter portion is configured to transmit the first color light, the second filter portion is configured to transmit the second color light, and the third filter portion is configured to transmit the third color light, the first filter portion overlaps with the first opening of the black matrix in a direction perpendicular to the base substrate, and the second filter portion overlaps with the first opening of the black matrix in a direction perpendicular to the base substrate. The filter portion overlaps with the second opening of the black matrix in a direction perpendicular to the base substrate, the third filter portion overlaps with the third opening of the black matrix in a direction perpendicular to the base substrate, the first sub-pixel has a first pixel opening, the second sub-pixel has a second pixel opening, the third sub-pixel has a third pixel opening, the first pixel opening overlaps with the first filter portion in a direction perpendicular to the base substrate, the second pixel opening overlaps with the second filter portion in a direction perpendicular to the base substrate, and the third pixel opening overlaps with the third filter portion in a direction perpendicular to the base substrate.

[0014] For example, the minimum size difference between the first opening of the black matrix and the first pixel opening is DF1, the minimum size difference between the second opening of the black matrix and the second pixel opening is DF2, the minimum size difference between the third opening of the black matrix and the third pixel opening is DF3, DF1 is different from DF2, and DF1 is different from DF3.

[0015] For example, DF1 is smaller than DF2, and DF1 is smaller than DF3.

[0016] For example, the display substrate further includes a touch structure and a barrier layer, wherein the touch structure is located on the side of the encapsulation layer facing away from the base substrate, and the barrier layer is located on the side of the touch structure facing away from the base substrate. The barrier layer has an opening, and the opening of the barrier layer overlaps with the pixel opening of the sub-pixel in a direction perpendicular to the base substrate, and the opening of the barrier layer is different in size from the pixel opening of the sub-pixel.

[0017] For example, the size of the opening of the blocking layer is smaller than the size of the pixel opening of the sub-pixel.

[0018] For example, the ratio of the area of ​​the opening of the blocking layer to the area of ​​the pixel opening of the sub-pixel is in a range of 0.9-0.99.

[0019] For example, the display substrate also includes a light emission enhancement pattern, which is located on the side of the light emitting device layer away from the base substrate, and the light emitting device layer includes the first light emitting device, the second light emitting device and the third light emitting device. The light emission enhancement pattern includes a plurality of light emission enhancement parts, and there is a gap between adjacent light emission enhancement parts. In a plan view, the area of ​​the light emission enhancement part of the light emission enhancement pattern located in the first pixel opening is SFZR, the area of ​​the light emission enhancement part of the light emission enhancement pattern located in the second pixel opening is SFZG, and the area of ​​the light emission enhancement part of the light emission enhancement pattern located in the third pixel opening is SFZB. In the plan view, the area of ​​the first pixel opening is SKR, the area of ​​the second pixel opening is SKG, and the area of ​​the third pixel opening is SKB, SFZR / SKR is smaller than SFZG / SKG, and SFZR / SKR is smaller than SFZB / SKB.

[0020] For example, the light extraction enhancement portion includes a lens.

[0021] For example, the display substrate further includes a functional film layer, and the functional film layer covers the light-extraction enhancement pattern.

[0022] For example, the refractive index of the functional film layer is different from the refractive index of the light extraction enhancement pattern.

[0023] For example, the refractive index of the functional film layer is greater than the refractive index of the light extraction enhancement pattern.

[0024] For example, the area of ​​the color mixing region of the first subpixel and the second subpixel is SH12, and the area of ​​the color mixing region of the second subpixel and the third subpixel is SH23. The color mixing region is the overlapping region of the local layer in the light-emitting functional layer, and SH23<SH12.

[0025] For example, two second sub-pixels are disposed around a first sub-pixel, and the areas of the color mixing regions of the two second sub-pixels and the first sub-pixel are S1 and S2 respectively, and S1 and S2 are different.

[0026] For example, two other second sub-pixels are provided around the first sub-pixel, and the areas of the color mixing regions of the other two second sub-pixels and the first sub-pixel are S3 and S4 respectively, and S3 and S4 are different.

[0027] For example, in the DCI-P3 color gamut, the color gamut coordinate of the first sub-pixel is RXY, the color gamut horizontal coordinate of the first sub-pixel is RX, and the color gamut horizontal coordinate of the second sub-pixel is GX, RX is greater than or equal to 0.686 and less than or equal to 0.688; GX is greater than or equal to 0.254 and less than or equal to 0.265.

[0028] For example, under the BT2020 standard, the color gamut of the first sub-pixel is greater than or equal to 95%, and the color gamut of the second sub-pixel is greater than or equal to 92.6%.

[0029] For example, the third light-emitting device includes a cathode, an anode and a third light-emitting layer located between the cathode and the anode, the third light-emitting layer includes a first light-emitting sublayer, a second light-emitting sublayer and a third light-emitting sublayer arranged in sequence, the first light-emitting sublayer is closer to the anode than the third light-emitting sublayer, the content of the hole transport characteristic material in the first light-emitting sublayer is greater than the content of the electron transport characteristic material in the first light-emitting sublayer, and the content of the hole transport characteristic material in the third light-emitting sublayer is less than the content of the electron transport characteristic material in the third light-emitting sublayer.

[0030] For example, the thickness of the third light-emitting layer is 10-60 nm.

[0031] For example, the first light-emitting device includes a first light-emitting layer and a first electron blocking layer located between a cathode and an anode, the second light-emitting device includes a second light-emitting layer and a second electron blocking layer located between the cathode and the anode, the first light-emitting layer and the first electron blocking layer overlap in a direction perpendicular to the substrate, the second light-emitting layer and the second electron blocking layer overlap in a direction perpendicular to the substrate, and the thickness of the first electron blocking layer is greater than or equal to 3 times the thickness of the second electron blocking layer.

[0032] For example, the thickness of the first electron blocking layer is The thickness of the second electron blocking layer is

[0033] For example, the plurality of sub-pixels also include a third sub-pixel, the third sub-pixel including a third light-emitting device, the third sub-pixel being configured to emit a third color light that is different from the first color light and different from the second color light, the third light-emitting device including a third light-emitting layer and a third electron blocking layer located between the cathode and the anode, the thickness of the second electron blocking layer being greater than or equal to the thickness of the third electron blocking layer.

[0034] For example, the thickness of the first electron blocking layer is The thickness of the second electron blocking layer is The thickness of the third electron blocking layer is

[0035] For example, the thickness of the first electron blocking layer is The thickness of the second electron blocking layer is The thickness of the third electron blocking layer is

[0036] For example, the molecular weight of the first electron blocking layer is 680-720, the second electron blocking layer includes a first electron blocking sublayer and a second electron blocking sublayer, the molecular weight of the first electron blocking sublayer is 640-680, the molecular weight of the second electron blocking sublayer is 700-730, and the molecular weight of the third electron blocking layer is 620-660.

[0037] For example, the thickness of the first light emitting device is in the range of The thickness of the second light emitting device is in the range of The thickness range of the third light emitting device is

[0038] For example, the molecular weight of the doping material in the first light-emitting layer of the first light-emitting device is in the range of 1000-1100.

[0039] For example, the molecular weight of the doping material in the second light-emitting layer of the second light-emitting device is in the range of 1000-1100.

[0040] For example, the molecular weight of the doping material in the third light-emitting layer of the third light-emitting device is in the range of 1000-1100.

[0041] For example, the microcavities of the first light-emitting device, the second light-emitting device, and the third light-emitting device are adjusted separately.

[0042] For example, the hole injection layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals, and / or the hole transport layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals, and / or the charge generation layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals.

[0043] For example, the display substrate further includes a redundant structure, and the redundant structure is the same as the structure of one of the first light emitting device, the second light emitting device, and the third light emitting device.

[0044] For example, the sub-pixel includes a pixel circuit and a light-emitting device, the pixel circuit is configured to drive the light-emitting device, and the light-emitting device includes the first light-emitting device, the second light-emitting device, and the third light-emitting device; the display substrate also includes a data line and a power line, the data line is configured to provide a data voltage to the pixel circuit, the power line is configured to provide a power voltage to the pixel circuit, and the data line and the power line are configured to pad the light-emitting device.

[0045] For example, the brightness of the first sub-pixel is greater than or equal to the brightness of the second sub-pixel, and the brightness of the second sub-pixel is greater than or equal to the brightness of the third sub-pixel.

[0046] For example, in natural mode or standard mode, the brightness of the first sub-pixel is greater than or equal to 160 nits, the brightness of the second sub-pixel is greater than or equal to 130 nits, and the brightness of the third sub-pixel is greater than or equal to 60 nits.

[0047] For example, in the natural mode or the standard mode, the brightness of the white light of the display substrate is greater than or equal to 550 nits.

[0048] For example, the display substrate also includes a pixel defining layer, the light-emitting functional layer of the light-emitting device of the sub-pixel includes a common layer and a local layer, the pixel defining layer has a first pixel opening, the local layer includes a first local layer, the first pixel opening is configured to define the light-emitting area of ​​the first light-emitting device, the orthographic projection of the first local layer on the base substrate overlaps with the orthographic projection of the first pixel opening on the base substrate, and for the same first sub-pixel, the center of the first pixel opening does not coincide with the center of the first local layer.

[0049] For example, the display substrate also includes a pixel defining layer, the light-emitting functional layer of the light-emitting device of the sub-pixel includes a common layer and a local layer, the pixel defining layer has a first pixel opening, the local layer includes a first local layer, the first pixel opening is configured to define the light-emitting area of ​​the first light-emitting device, the orthographic projection of the first local layer on the base substrate overlaps with the orthographic projection of the first pixel opening on the base substrate, the first sub-pixel and the third sub-pixel are arranged along the first direction and the second direction, and for the same first sub-pixel, in at least one of the first direction and the second direction, the central axis of the first pixel opening does not coincide with the central axis of the first local layer.

[0050] For example, an overlapping area of ​​the local layers of the third sub-pixel and the second sub-pixel is smaller than an overlapping area of ​​the local layers of the first sub-pixel and the second sub-pixel.

[0051] For example, the local layer also includes a third local layer, the orthographic projection of the third local layer on the substrate overlaps with the orthographic projection of the third pixel opening of the third sub-pixel on the substrate, and the distance between the center of the pixel opening of the third sub-pixel and the center of the third local layer is smaller than the distance between the center of the pixel opening of the first sub-pixel and the center of the first local layer.

[0052] For example, the first sub-pixel is configured to emit red light, the second sub-pixel is configured to emit green light, and the third sub-pixel is configured to emit blue light.

[0053] For example, at the same viewing angle, the difference between the brightness of the second sub-pixel and the brightness of the third sub-pixel is greater than or equal to 0.001 and less than or equal to 0.019, and the brightness of the third sub-pixel is normalized brightness.

[0054] An embodiment of the present disclosure further provides a display substrate, comprising: a base substrate; and a plurality of sub-pixels, including a first sub-pixel and a second sub-pixel, wherein the first sub-pixel is configured to emit a first color light, and the second sub-pixel is configured to emit a second color light different from the first color light; the first sub-pixel includes a first light-emitting device, and the second sub-pixel includes a second light-emitting device, wherein, at a viewing angle with an absolute value of less than or equal to 30°, the following relationship is satisfied: |YGL1-YRL1| / |YGL2-YRL2|=LA, |YGR1-YRR1| / |YGR2-YRR2|=RA, and |RA-LA|≤ 0.47, wherein LA is the color shift evaluation parameter at the left viewing angle, RA is the color shift evaluation parameter at the right viewing angle, YRL1 and YRL2 are the brightness of the first sub-pixel at viewing angles of -15° and -30°, respectively, YRR1 and YRR2 are the brightness of the first sub-pixel at viewing angles of 15° and 30°, respectively, YGL1 and YGL2 are the brightness of the second sub-pixel at viewing angles of -15° and -30°, respectively, and YGR1 and YGR2 are the brightness of the second sub-pixel at viewing angles of 15° and 30°, respectively. In the above relationship, the brightness of the first sub-pixel is the normalized brightness, and the brightness of the second sub-pixel is the normalized brightness.

[0055] In some embodiments, at viewing angles A and B, the brightness of the first sub-pixel and the brightness of the second sub-pixel satisfy the following relationship: (YRLA+YRLB)×|BA| / 2-(YGLA+YGLB)×|BA| / 2=S0; wherein S0 is a color deviation evaluation parameter at viewing angles A and B, YRLA and YGLA are the brightness of the first sub-pixel and the second sub-pixel at viewing angle A, respectively, and YRLB and YGLB are the brightness of the first sub-pixel and the second sub-pixel at viewing angle B, respectively; viewing angles A and B are both negative viewing angles or both positive viewing angles, 0<|A|<|B|<45°, |BA|≤15°, and S0≤1.60.

[0056] In some embodiments, 0.20≤S0≤0.90.

[0057] An embodiment of the present disclosure further provides a display substrate, comprising: a base substrate; and a plurality of sub-pixels, comprising a first sub-pixel and a second sub-pixel, wherein the first sub-pixel is configured to emit a first color light, and the second sub-pixel is configured to emit a second color light different from the first color light; the first sub-pixel comprises a first light-emitting device, and the second sub-pixel comprises a second light-emitting device, wherein the size of the first light-emitting device in a direction perpendicular to the base substrate is greater than the size of the second light-emitting device in a direction perpendicular to the base substrate, At viewing angles A1 and B1, the brightness of the first sub-pixel and the brightness of the second sub-pixel satisfy the following relationship: (YRLA1+YRLB1)×|B1-A1| / 2-(YGLA1+YGLB1)×|B1-A1| / 2=S11; at viewing angles A2 and B2, the brightness of the first sub-pixel and the brightness of the second sub-pixel satisfy the following relationship: (YRLA2+YRLB2)×|B2-A2| / 2-(YGLA2+YGLB2)×|B2-A2| / 2=S22; where , S11 is the color shift evaluation parameter under the viewing angles A1 and B1, S22 is the color shift evaluation parameter under the viewing angles A2 and B2, YRLA1 and YGLA1 are the brightness of the first sub-pixel and the second sub-pixel under the viewing angle A1, YRLB1 and YGLB1 are the brightness of the first sub-pixel and the second sub-pixel under the viewing angle B1; YRLA2 and YGLA2 are the brightness of the first sub-pixel and the second sub-pixel under the viewing angle A2, YRLB2 and YGLB2 are the brightness of the first sub-pixel and the second sub-pixel under the viewing angle B2. The brightness of the first sub-pixel and the second sub-pixel; in the above relationship, the brightness of the first sub-pixel is the normalized brightness, and the brightness of the second sub-pixel is the normalized brightness, wherein the A1 viewing angle and the B1 viewing angle are both negative viewing angles or both positive viewing angles, 0<|A1|<|B1|<45°, |B1-A1|≤15°, the A2 viewing angle and the B2 viewing angle are both negative viewing angles or both positive viewing angles, 0<|A2|<|B2|<45°, |B2-A2|≤15°, and the average value of S11 and S22 is less than or equal to 1.38.

[0058] In some embodiments, |B1-A1|≤10°, |B2-A2|≤10°, and the average value of S11 and S22 is less than or equal to 0.38.

[0059] In some embodiments, the first sub-pixel is configured to emit red light, and the second sub-pixel is configured to emit green light or blue light.

[0060] In some embodiments, the sub-pixel includes a pixel circuit and a light-emitting device, the pixel circuit is configured to drive the light-emitting device, the pixel circuit includes at least one transistor with polysilicon as an active layer and at least one transistor with an oxide semiconductor as an active layer, the display substrate includes a light-shielding layer, and the orthographic projection of the active layer in the transistor with polysilicon as an active layer on the base substrate overlaps with the orthographic projection of the light-shielding layer on the base substrate.

[0061] An embodiment of the present disclosure further provides a display device comprising any of the above-mentioned display substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0063] FIG1 is a schematic diagram of a display substrate.

[0064] FIG. 2 is a schematic diagram showing a viewing angle of a display substrate.

[0065] FIG3 is a cross-sectional view of a display substrate.

[0066] FIG. 4A is a brightness curve diagram of a display substrate.

[0067] FIG. 4B is a brightness curve diagram of a display substrate.

[0068] FIG5 is a schematic diagram of a brightness test of a display substrate provided by an embodiment of the present disclosure.

[0069] FIG6 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure.

[0070] FIG7 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure.

[0071] FIG8 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure.

[0072] FIG9 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0073] FIG10 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure.

[0074] FIG11 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0075] FIG12 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure.

[0076] FIG13 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure.

[0077] FIG14 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0078] FIG15 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure.

[0079] FIG16 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0080] FIG17 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0081] FIG18 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure.

[0082] FIG19 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure.

[0083] FIG20 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure.

[0084] FIG21 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure.

[0085] FIG22 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0086] FIG23 is a circuit diagram of a pixel circuit and a light-emitting device in a sub-pixel of a display panel substrate.

[0087] FIG24 is a cross-sectional view of a display panel substrate. DETAILED DESCRIPTION

[0088] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0089] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0090] Due to various reasons, a display device may have a certain color shift, thereby affecting the display effect.

[0091] Embodiments of the present disclosure provide a display substrate and a display device to reduce or avoid color shift and improve display effects.

[0092] Figure 1 is a schematic diagram of a display substrate. As shown in Figure 1 , the display substrate DS includes a display area R01 and a peripheral area R02, with sub-pixels 100 located within the display area R01. Figure 1 uses the example of peripheral area R02 surrounding the display area R01. The multiple sub-pixels 100 include a first sub-pixel 101, a second sub-pixel 102, and a third sub-pixel 103. As shown in Figure 1 , a pixel PX includes the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103.

[0093] In the embodiment of the present disclosure, the sub-pixel 100 is the smallest unit of light emission. A pixel PX may include a plurality of sub-pixels 100 that emit different light.

[0094] Figure 2 is a schematic diagram of a viewing angle of a display substrate. As shown in Figure 2, the display substrate DS has a light-emitting surface SE and a normal line Ln, which is perpendicular to the light-emitting surface SE. The angle between the line of sight VW and the normal line Ln is the viewing angle θa.

[0095] Figure 3 is a cross-sectional view of a display substrate. Figure 3 shows the normal line Ln, which is located at the center of the display substrate. Normal line Ln is parallel to direction Z. Figure 3 shows a first viewing angle VW1 and a second viewing angle VW2. The angle between the first viewing angle VW1 and the normal line Ln is +θ, and the angle between the second viewing angle VW2 and the normal line Ln is -θ. At a positive viewing angle θ, the angle from the normal line Ln to this viewing angle is a clockwise rotation of θ. At a negative viewing angle -θ, the angle from the normal line Ln to this viewing angle is a counterclockwise rotation of θ.

[0096] The situation shown in FIG3 is used to measure the color shift of the left and right viewing angles. When measuring the color shift of the top and bottom viewing angles, the first viewing angles VW1 and VW2 are set on both sides of the normal line Ln in the direction Y.

[0097] FIG4A is a brightness curve diagram of a display substrate. FIG4B is a brightness curve diagram of a display substrate. FIG4B shows two approximate trapezoids TR1 and TR2. FIG4A and FIG4B are brightness curve diagrams after normalization. As shown in FIG4A and FIG4B , the maximum brightness on the vertical axis is 1. The horizontal axis 0.0 represents the viewing angle of 0 degrees. As shown in FIG4A and FIG4B , at the viewing angle of 0 degrees, the brightness of the sub-pixel is the maximum. As shown in FIG4A and FIG4B , a negative number on the left side of the viewing angle of 0 degrees represents a negative viewing angle, and a positive number on the right side of the viewing angle of 0 degrees represents a positive viewing angle. For example, a negative viewing angle is a left viewing angle, and a positive viewing angle is a right viewing angle. For example, a negative viewing angle is an upper viewing angle, and a positive viewing angle is a lower viewing angle.

[0098] Figures 4A and 4B show curves C1, C2, and C3. Curve C1 is a luminance curve for the first subpixel 101, curve C2 is a luminance curve for the second subpixel 102, and curve C3 is a luminance curve for the third subpixel 103. As shown in Figures 4A and 4B, curves C1, C2, and C3 show that within a range of approximately -50 degrees to approximately +50 degrees of viewing angle, the luminance of the first subpixel 101 is greater than that of the second subpixel 102, and greater than that of the third subpixel 103. As shown in Figures 4A and 4B, curves C1, C2, and C3 show that within a range of approximately -80 degrees to approximately -50 degrees of viewing angle, and within a range of approximately +50 degrees to approximately +80 degrees of viewing angle, the luminance of the first subpixel 101 is less than that of the second subpixel 102, and less than that of the third subpixel 103. As shown in FIG. 4A and FIG. 4B , it can be seen from curves C2 and C3 that the overlap between curves C2 and C3 is high, that is, at the same viewing angle, the brightness of the second sub-pixel 102 is not much different from that of the third sub-pixel 103 .

[0099] In the embodiments of the present disclosure, unless otherwise specified, the brightness of the sub-pixel refers to the normalized brightness. Normalized brightness refers to the brightness of the sub-pixel at a 0° viewing angle being 1, and the brightness of the remaining brightness being adjusted proportionally. The brightness of the sub-pixel at a 0° viewing angle is the maximum brightness. In the embodiments of the present disclosure, when it comes to the brightness under the viewing angle, the calculation is normalized, that is, the normalized brightness. The brightness with the unit nit is not the normalized brightness, but the measured brightness. For example, when normalizing the calculation, the measured brightness at a 0° viewing angle is set to 1, and the measured brightness at a viewing angle of X is divided by the measured brightness at a 0° viewing angle, which is the normalized brightness at a viewing angle of X.

[0100] As shown in Figures 4A and 4B, the normalized brightness of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 at a viewing angle of 0° is all 1. That is, the maximum brightness of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 is the same. The embodiments of the present disclosure are described using this example, but are not limited thereto.

[0101] FIG5 is a schematic diagram of a brightness test of a display substrate provided by an embodiment of the present disclosure. As shown in FIG5 , the display substrate includes a display area R01 and a peripheral area R02, and the sub-pixels are located in the display area R01. A plurality of test points are selected from the display area. 9 test points are selected in FIG5 , and the brightness of each test point can be measured. FIG5 shows that the sub-pixels can be divided into a plurality of sub-pixel groups PG. FIG5 shows sub-pixel group PG1, sub-pixel group PG2, and sub-pixel group PG3. For example, in some embodiments, each sub-pixel group PG may correspond to one or more rows of sub-pixels. For example, in other embodiments, each sub-pixel group PG may correspond to one or more columns of sub-pixels.

[0102] As shown in Figure 5, the first to third test points are three test points at different positions of the sub-pixel group PG1, the fourth to sixth test points are three test points at different positions of the sub-pixel group PG2, and the seventh to ninth test points are three test points at different positions of the sub-pixel group PG3.

[0103] For example, the brightness of the subpixels in each subpixel group PG can be the average brightness of the test points corresponding to the subpixel group PG. As shown in FIG5 , the brightness of the subpixels in subpixel group PG1 is the average brightness of the first test point, the second test point, and the third test point; the brightness of the subpixels in subpixel group PG2 is the average brightness of the fourth test point, the fifth test point, and the sixth test point; and the brightness of the subpixels in subpixel group PG3 is the average brightness of the seventh test point, the eighth test point, and the ninth test point.

[0104] As shown in Figure 5 , for the same subpixel group, the test point located in the middle position can be the middle position of the test points near the boundary of the display area. For example, the distance from the second test point to the first test point is equal to the distance from the second test point to the third test point. Similarly, the distance from the fifth test point to the fourth test point is equal to the distance from the fifth test point to the sixth test point, and the distance from the eighth test point to the seventh test point is equal to the distance from the eighth test point to the ninth test point.

[0105] For example, as shown in FIG5 , when testing the brightness of the entire display substrate, the distance between the fourth test point and the first test point is equal to the distance between the fourth test point and the seventh test point, the distance between the fifth test point and the second test point is equal to the distance between the fifth test point and the eighth test point, and the distance between the sixth test point and the third test point is equal to the distance between the sixth test point and the ninth test point. Of course, the embodiments of the present disclosure include but are not limited to this.

[0106] As shown in Figure 5, the following principles can be applied when selecting test points. Figure 5 shows the length Ly and width Lx of display area R01. The distance Lx0 between the test point and the boundary of display area R01 in direction X is greater than or equal to Lx / 10, and the distance Ly0 between the test point and the boundary of display area R01 in direction Y is greater than or equal to Ly / 10.

[0107] The above describes a brightness test method using the nine-point test method as an example. It should be noted that the embodiments of the present disclosure do not limit the brightness test method, and the method can be determined according to needs.

[0108] In the embodiments of the present disclosure, brightness can be measured using a common brightness meter, and the brightness meter used is not limited. The embodiments of the present disclosure use the IV2012TR-01S device of LMS (Light Measurement Solutions) to perform brightness measurement / testing as an example.

[0109] FIG6 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure. As shown in FIG6 , the display substrate includes a base substrate BS and a plurality of sub-pixels 100 located on the base substrate BS. The plurality of sub-pixels 100 include a first sub-pixel 101 and a second sub-pixel 102. The first sub-pixel 101 is configured to emit light of a first color, and the second sub-pixel 102 is configured to emit light of a second color different from the first color.

[0110] 4A and 6 , at viewing angles A and B, the brightness of the first sub-pixel 101 and the brightness of the second sub-pixel 102 satisfy the following relationship:

[0111] (YRLA+YRLB)×|BA| / 2-(YGLA+YGLB)×|BA| / 2=S0;

[0112] Where S0 is the color shift evaluation parameter at viewing angles A and B, YRLA and YGLA are the luminances of the first subpixel 101 and the second subpixel 102 at viewing angle A, respectively, and YRLB and YGLB are the luminances of the first subpixel 101 and the second subpixel 102 at viewing angle B, respectively. Viewing angles A and B are both negative or positive, 0 < |A| < |B| < 45°, |BA| ≤ 15°, and S0 ≤ 1.60. For example, S0 can be approximately equal to the area of ​​the approximately trapezoidal shape shown by the shaded portion in FIG. 4A .

[0113] The display substrate provided by the embodiments of the present disclosure can reduce the brightness difference between sub-pixels emitting light of different colors, alleviate or avoid color shift, and improve display quality by ensuring that 0<|A|<|B|<45°, |BA|≤15°, and S0≤1.60 in the above relationship. For example, S0 is greater than 0.

[0114] For example, in some embodiments, the viewing angle A is 30°, the viewing angle B is 40°, and S0≤1.60.

[0115] For example, in some other embodiments, the viewing angle A is -20°, the viewing angle B is -30°, and S0≤1.60.

[0116] For example, in other embodiments, |BA|≤10°, 0.20≤S0≤0.90.

[0117] For example, S0 ≥ 0.05. That is, 0.20 ≤ S0 ≤ 0.60.

[0118] For further example, 0.22≤S0≤0.57.

[0119] For further example, 0.30≤S0≤0.40.

[0120] For example, S0≤0.22.

[0121] For example, 0.05≤S0≤0.22.

[0122] The upper limit and lower limit of S0 are given to further screen the display substrate that has excellent beneficial effects of reducing or avoiding color shift.

[0123] For example, as shown in FIG4A , in order to obtain color shift balance, at a viewing angle where the absolute value of the viewing angle is less than or equal to 30° (small viewing angle),

[0124] |YGL1-YRL1| / |YGL2-YRL2|=LA, |YGR1-YRR1| / |YGR2-YRR2|=RA,

[0125] And |RA-LA|≤0.47, where LA is a color shift evaluation parameter at a left viewing angle, RA is a color shift evaluation parameter at a right viewing angle, YRL1 and YRL2 are the brightness of the first sub-pixel 101 at viewing angles of -15° and -30°, respectively, YRR1 and YRR2 are the brightness of the first sub-pixel 101 at viewing angles of 15° and 30°, respectively, YGL1 and YGL2 are the brightness of the second sub-pixel 102 at viewing angles of -15° and -30°, respectively, and YGR1 and YGR2 are the brightness of the second sub-pixel 102 at viewing angles of 15° and 30°, respectively.

[0126] The display substrate provided by the embodiment of the present disclosure has a decreasing rate of |YGL1-YRL1| that is smaller than |YGL2-YRL2|, a decreasing rate of |YGR1-YRR1| that is smaller than |YGR2-YRR2|, and |RA-LA|≤0.47, thereby achieving color deviation balance at small angles, for example, balancing the color deviation at small-angle left and right viewing angles, or balancing the color deviation at small-angle up and down viewing angles.

[0127] For example, color cast balance can mean consistent color cast. For example, left-right viewing angle color cast balance can mean that the left and right viewing angle color casts are consistent or approaching consistency. For example, left-right viewing angle color cast balance can mean that the left and right viewing angle color casts are equal or substantially equal.

[0128] For example, in order to make the brightness decay speed of the first sub-pixel 101 and the second sub-pixel 102 tend to be consistent, at a viewing angle where the absolute value of the viewing angle is greater than or equal to 60° (large viewing angle),

[0129] |YGL3-YRL3|=YAL1, and |YGL4-YRL4|=YAL2,

[0130] |YGR3-YRR3|=YAR1, and |YGR4-YRR4|=YAR2,

[0131] The value range of |YAL1 / YAR1| is 0.5-1.2, and the value range of |YAL2 / YAR2| is 0.5-1.2, YAL1 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of -60°, YAL2 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of -75°, YAR1 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of 60°, and YAR2 is the brightness difference between the first sub-pixel and the second sub-pixel at a viewing angle of 75°. The brightness difference between the first sub-pixel and the second sub-pixel, YRL3 and YRL4 are the brightness of the first sub-pixel 101 at viewing angles of -60° and -75°, respectively; YRR3 and YRR4 are the brightness of the first sub-pixel 101 at viewing angles of 60° and 75°, respectively; YGL3 and YGL4 are the brightness of the second sub-pixel 102 at viewing angles of -60° and -75°, respectively; and YGR3 and YGR4 are the brightness of the second sub-pixel 102 at viewing angles of 60° and 75°, respectively.

[0132] For example, the value range of |YAL1 / YAR1| is 0.7-1.2, and the value range of |YAL2 / YAR2| is 0.7-1.2.

[0133] As can be seen from Figure 4A, at a wide viewing angle, the brightness decay rate of the second sub-pixel 102 is faster than the brightness decay rate of the first sub-pixel 101. Therefore, in order to make the brightness decay rates of the first sub-pixel 101 and the second sub-pixel 102 tend to be consistent, an embodiment of the present disclosure provides a display substrate having the above-mentioned relationship at a wide viewing angle.

[0134] As shown in Figure 6, the first sub-pixel 101 includes a first light-emitting device EM1, and the second sub-pixel 102 includes a second light-emitting device EM2. The size H1 of the first light-emitting device EM1 in the direction perpendicular to the substrate BS is greater than the size H2 of the second light-emitting device EM2 in the direction perpendicular to the substrate BS, so as to improve the luminous efficiency of the sub-pixel.

[0135] The three relationships described above are: (YRLA + YRLB) × |BA| / 2 - (YGLA + YGLB) × |BA| / 2 = S0; |RA - LA| ≤ 0.47; and |YAL1 / YAR1| ranges from 0.5 to 1.2, and |YAL2 / YAR2| ranges from 0.5 to 1.2. A display substrate may satisfy at least one of the three relationships.

[0136] In some embodiments, to reduce the brightness difference between sub-pixels emitting different colors, mitigate or avoid color shift, and improve display quality, the display substrate satisfies a first relationship. Furthermore, for example, based on this, the display substrate also satisfies a second relationship to achieve balanced color shift at narrow viewing angles, either horizontally or vertically. Furthermore, for example, based on this, the display substrate also satisfies a third relationship to achieve balanced color shift at wide viewing angles, either horizontally or vertically.

[0137] In some other embodiments, the display substrate satisfies the second relational expression. For example, based on this, the display substrate also satisfies the first relational expression and / or the third relational expression.

[0138] In some other embodiments, the display substrate satisfies the third relational expression. For example, based on this, the display substrate also satisfies the first relational expression and / or the second relational expression.

[0139] For example, as shown in Figures 1 and 6, the plurality of sub-pixels 100 further include a third sub-pixel 103, the third sub-pixel 103 includes a third light-emitting device EM3, and the third sub-pixel 103 is configured to emit a third color light that is different from the first color light and the second color light.

[0140] As shown in FIG6 , the third sub-pixel 103 includes a third light emitting device EM3 , and a size H1 of the first light emitting device EM1 in a direction perpendicular to the substrate BS is larger than a size H3 of the third light emitting device EM3 in a direction perpendicular to the substrate BS.

[0141] As shown in FIG6 , a dimension H1 of the first light-emitting device EM1 in a direction perpendicular to the substrate BS is greater than a dimension H2 of the second light-emitting device EM2 in a direction perpendicular to the substrate BS, and a dimension H2 of the second light-emitting device EM2 in a direction perpendicular to the substrate BS is greater than a dimension H3 of the third light-emitting device EM3 in a direction perpendicular to the substrate BS, so as to improve the luminous efficiency of the sub-pixel.

[0142] For example, as shown in FIG6 , a size H2 of the second light emitting device EM2 in a direction perpendicular to the base substrate BS is greater than a size H3 of the third light emitting device EM3 in a direction perpendicular to the base substrate BS.

[0143] In the embodiments of the present disclosure, the direction perpendicular to the substrate BS is referred to as direction Z, which may refer to a surface perpendicular to the substrate BS used to fabricate each component. For example, in a cross-sectional view, the direction perpendicular to the substrate BS may refer to a direction perpendicular to the upper surface of the substrate. In the embodiments of the present disclosure, the dimension of a component in the direction perpendicular to the substrate BS may refer to its thickness.

[0144] As shown in FIG4B and FIG6 , at viewing angles A1 and B1, the brightness of the first sub-pixel 101 and the brightness of the second sub-pixel 102 satisfy the following relationship:

[0145] (YRLA1+YRLB1)×|B1-A1| / 2-(YGLA1+YGLB1)×|B1-A1| / 2=S11;

[0146] At viewing angles A2 and B2, the brightness of the first sub-pixel 101 and the brightness of the second sub-pixel 102 satisfy the following relationship:

[0147] (YRLA2+YRLB2)×|B2-A2| / 2-(YGLA2+YGLB2)×|B2-A2| / 2=S22;

[0148] Among them, S11 is the color shift evaluation parameter under the viewing angles A1 and B1, S22 is the color shift evaluation parameter under the viewing angles A2 and B2, YRLA1 and YGLA1 are the brightness of the first sub-pixel 101 and the second sub-pixel 102 under the viewing angle A1, YRLB1 and YGLB1 are the brightness of the first sub-pixel 101 and the second sub-pixel 102 under the viewing angle B1; YRLA2 and YGLA2 are the brightness of the first sub-pixel 101 and the second sub-pixel 102 under the viewing angle A2. degrees, YRLB2 and YGLB2 are the brightness of the first sub-pixel 101 and the second sub-pixel 102 at the B2 viewing angle, respectively; wherein, the A1 viewing angle and the B1 viewing angle are both negative viewing angles or both positive viewing angles, 0<|A1|<|B1|<45°, |B1-A1|≤15°, the A2 viewing angle and the B2 viewing angle are both negative viewing angles or both positive viewing angles, 0<|A2|<|B2|<45°, |B2-A2|≤15°, and the average value of S11 and S22 is less than or equal to 1.38.

[0149] FIG4B illustrates an example where both trapezoids TR1 and TR2 are located on the right side, but the present invention is not limited thereto. Alternatively, the two trapezoids TR1 and TR2 may be located on the left and right sides, respectively, i.e., one may be located at a negative viewing angle and the other at a positive viewing angle. FIG4B illustrates that the areas of the two approximate trapezoids TR1 and TR2 do not overlap, but the embodiments of the present disclosure are not limited thereto. In other embodiments, the areas of the two approximate trapezoids TR1 and TR2 may overlap.

[0150] The average value of S11 and S22 is the average value of the two S0. Of course, the average value of three or more S0 can also be calculated.

[0151] The display substrate provided by the embodiments of the present disclosure can improve the luminous efficiency of sub-pixels by designing the thickness of light-emitting devices that emit light of different colors.

[0152] For example, in a display substrate that satisfies at least one of the three relationships, the first subpixel 101 is a first color subpixel and the second subpixel 102 is a second color subpixel. In this case, the first color subpixel and the second color subpixel satisfy at least one of the three relationships.

[0153] Because the brightness difference between the second sub-pixel 102 and the third sub-pixel 103 is not significant, in a display substrate that satisfies at least one of the three aforementioned equations, the second sub-pixel 102 can be replaced with the third sub-pixel 103. The third sub-pixel 103 is a third-color sub-pixel. In this case, the first-color sub-pixel and the third-color sub-pixel satisfy at least one of the three aforementioned equations, that is, the first sub-pixel 101 and the third sub-pixel 103 satisfy at least one of the three aforementioned equations.

[0154] For example, the first color sub-pixel is a red sub-pixel, the second color sub-pixel is a green sub-pixel, and the third color sub-pixel is a blue sub-pixel.

[0155] Tables 1 to 3 show the brightness of sub-pixels of different colors in the display substrate provided by the embodiments of the present disclosure at different viewing angles. Table 4 shows the value of S0 and the average values ​​of S11 and S22 for display substrate 1. Table 5 shows the value of S0 and the average values ​​of S11 and S22 for display substrate 2. At least one of the above-mentioned relationship equations can be derived from the respective values ​​given in Tables 1 to 5.

[0156] Table 1. Brightness of different color sub-pixels in the display substrate 1 at different viewing angles

[0157] Table 2. Brightness of different color sub-pixels in the display substrate 2 at different viewing angles

[0158] Table 3. Brightness of different color sub-pixels in the display substrate 3 at different viewing angles

[0159] Table 4 shows the S0 value and the average values ​​of S11 and S22 of substrate 1

[0160] Table 5 shows the S0 value and the average values ​​of S11 and S22 of substrate 2

[0161] In Tables 4 and 5, YBLA in (YBLA+YBLB)×|BA| / 2 is the luminance of the third subpixel 103 at viewing angle A, and YBLB is the luminance of the third subpixel 103 at viewing angle B. (YBLA+YBLB)×|BA| / 2 is given to distinguish it from (YGLA+YGLB)×|BA| / 2 of the second subpixel 102.

[0162] “RG” in Tables 4 and 5 represents S0 or the average value of S0 calculated from the first sub-pixel 101 and the second sub-pixel 102 , and “RB” in Tables 4 and 5 represents S0 or the average value of S0 calculated from the first sub-pixel 101 and the third sub-pixel 103 .

[0163] Tables 1 through 3 show the brightness differences between the second and third sub-pixels 102 and 103 of the display substrate, respectively. At the same viewing angle, the difference between the brightness of the second and third sub-pixels 102 and 103 is greater than or equal to 0.001 and less than or equal to 0.019. The brightness values ​​in Tables 1 through 3 refer to normalized brightness.

[0164] For further example, at the same viewing angle, the difference between the brightness of the second sub-pixel 102 and the brightness of the third sub-pixel 103 is greater than or equal to 0.001 and less than or equal to 0.011.

[0165] It can be understood that in some display substrates, the first color sub-pixel and the second color sub-pixel satisfy at least one of the above three relationships, and the first color sub-pixel and the third color sub-pixel satisfy at least one of the above three relationships.

[0166] For example, -15.0 is selected as the A perspective from Table 1, and -30.0 is selected as the B perspective from Table 1, then A=-15.0, B=-30.0, YRLA=0.91904203, YRLB=0.631532159, YGLA=0.890019, YGLB=0.600271, thus, (YRLA+YRLB)×|BA| / 2-(YGLA+YGLB)×|BA| / 2≈11.629305-11.177175≈0.45≤0.60.

[0167] For example, 15.0 is selected from Table 1 as the A perspective, and 30.0 is selected from Table 1 as the B perspective, then A=15.0, B=30.0, YRLA=0.876937259, YRLB=0.62605813, YGLA=0.833917, YGLB=0.595006, thus, (YRLA+YRLB)×|BA| / 2-(YGLA+YGLB)×|BA| / 2≈11.2724625-10.7169225≈0.56≤0.60.

[0168] For example, -15.0 is selected as the A perspective from Table 2, and -30.0 is selected as the B perspective from Table 2, then A = -15.0, B = -30.0, YRLA = 0.968045415, YRLB = 0.753419962, YGLA = 0.885914592, YGLB = 0.641403566, thus, (YRLA + YRLB) × |BA| / 2 - (YGLA + YGLB) × |BA| / 2 ≈ 12.9109875 - 11.4548925 ≈ 1.45.

[0169] For example, 15.0 is selected from Table 2 as the A perspective, and 30.0 is selected from Table 2 as the B perspective, then A = 15.0, B = 30.0, YRLA = 0.929172858, YRLB = 0.712642113, YGLA = 0.855736259, YGLB = 0.611596222, thus, (YRLA + YRLB) × |BA| / 2 - (YGLA + YGLB) × |BA| / 2 ≈ 12.3136125 - 11.00499 ≈ 1.31.

[0170] For example, 15.0 is selected from Table 3 as the A perspective, and 30.0 is selected from Table 3 as the B perspective, then A = 15.0, B = 30.0, YRLA = 0.910833, YRLB = 0.656743, YGLA = 0.857582, YGLB = 0.61462, thus, (YRLA + YRLB) × |BA| / 2 - (YGLA + YGLB) × |BA| / 2 = 11.75682 - 11.041515 ≈ 0.72.

[0171] For example, if -15.0 is selected as the A perspective from Table 3 and -30.0 is selected as the B perspective from Table 3, then A = -15.0, B = -30.0, YRLA = 0.913043, YRLB = 0.679587, YGLA = 0.842441, YGLB = 0.596404, and thus, (YRLA + YRLB) × |BA| / 2 - (YGLA + YGLB) × |BA| / 2 = 11.944725 - 10.7913375 ≈ 1.15.

[0172] Referring to Table 4 and Table 5, the viewing angles A and B are both negative or positive, 0<|A|<|B|<45°, |BA|≤10°, and S0≤1.60.

[0173] It should be noted that, when calculating S11 or S22, S0 calculated at the viewing angles A and B is the same as S11 or S22 calculated at the viewing angles A and B.

[0174] Taking Table 1 as an example, the viewing angle of A1 is -15° and the viewing angle of B1 is -30°, then, as calculated above, S11≈0.45; the viewing angle of A2 is 15° and the viewing angle of B2 is 30°, then, as calculated above, S22≈0.56; the average value of S11 and S22 is 0.505.

[0175] Taking Table 2 as an example, the viewing angle of A1 is -15° and the viewing angle of B1 is -30°. Then, as calculated above, S11≈1.45. The viewing angle of A2 is 15° and the viewing angle of B2 is 30°. Then, as calculated above, S22≈1.31. The average value of S11 and S22 is 1.38.

[0176] Taking Table 3 as an example, if the viewing angle of A1 is -15° and the viewing angle of B1 is -30°, then, as calculated above, S11≈1.15; if the viewing angle of A2 is 15° and the viewing angle of B2 is 30°, then, as calculated above, S22≈0.72; the average value of S11 and S22 is 0.935.

[0177] Referring to Table 4, the viewing angle of A1 is -15° and the viewing angle of B1 is -20°, then S11 = 0.265065; the viewing angle of A2 is -15° and the viewing angle of B2 is -30°, then S22 = 0.452132; the average value of S11 and S22 is 0.3586.

[0178] Referring to Table 4, the viewing angle of A1 is 10° and the viewing angle of B1 is 20°, then S11 = 0.325893; the viewing angle of A2 is 0° and the viewing angle of B2 is 15°, then S22 = 0.322649; the average value of S11 and S22 is 0.324271.

[0179] Referring to Table 5, the viewing angle of A1 is -15° and the viewing angle of B1 is -20°, then S11 = 0.70975; the viewing angle of A2 is -15° and the viewing angle of B2 is -30°, then S22 = 1.456104; the average value of S11 and S22 is approximately 1.083.

[0180] Referring to Table 4, the viewing angle of A1 is 10° and the viewing angle of B1 is 20°, then S11 = 0.766871; the viewing angle of A2 is 0° and the viewing angle of B2 is 15°, then S22 = 0.550774; the average value of S11 and S22 is approximately 0.6588.

[0181] Referring to Table 4, for the first sub-pixel 101 and the second sub-pixel 102 , the average value of the six S0 values ​​(the average value of the three different S11 values ​​and the three different S22 values) is less than or equal to 0.36.

[0182] Referring to Table 4, for the first sub-pixel 101 and the third sub-pixel 103 , the average value of the six S0 values ​​(the average value of the three different S11 values ​​and the three different S22 values) is less than or equal to 0.41.

[0183] Referring to Table 4, the A1 viewing angle and the B1 viewing angle take three different values, and the A2 viewing angle and the B2 viewing angle take three different values ​​to obtain three S11s and three S22s, and the average values ​​of the three S11s and the three S22s are less than or equal to 0.41.

[0184] Thus, for the display substrate 1 , the average value of S0 of the six trapezoids (the average value of S11 and S22 ) is less than or equal to 0.41.

[0185] Referring to Table 4, the average values ​​of S11 and S22 are less than or equal to 0.51.

[0186] Referring to Table 4, when |BA|≤10°, the average values ​​of S11 and S22 are less than or equal to 0.38. In Table 4, the average values ​​of S11 and S22 are approximately 0.30.

[0187] Referring to Table 5, for the first sub-pixel 101 and the second sub-pixel 102 , the average value of the six S0 values ​​(the average value of the three different S11 values ​​and the three different S22 values) is less than or equal to 0.91.

[0188] Referring to Table 5, for the first sub-pixel 101 and the third sub-pixel 103 , the average value of the six S0 values ​​(the average value of the three different S11 values ​​and the three different S22 values) is less than or equal to 1.00.

[0189] Referring to Table 5, the A1 viewing angle and the B1 viewing angle take three different values, and the A2 viewing angle and the B2 viewing angle take three different values ​​to obtain three S11s and three S22s, and the average values ​​of the three S11s and the three S22s are less than or equal to 1.00.

[0190] Thus, for the display substrate 2 , the average value of the six S0 s (the average value of S11 and S22 ) is less than or equal to 1.00.

[0191] Referring to Table 5, when |BA|≤10°, the average values ​​of S11 and S22 are less than or equal to 1.00. In Table 4, when |BA|≤10°, the average values ​​of S11 and S22 are approximately 0.738.

[0192] Referring to Table 5, the average values ​​of S11 and S22 are less than or equal to 1.38.

[0193] For example, at a viewing angle with an absolute value of less than or equal to 30°, in the display substrate 1 described in Table 1, YRL1=0.919042, YRL2=0.631532, YRR1=0.876937, YRR2=0.626058, YGL1=0.890019, YGL2=0.600271, YGR1=0.833917, YGR2=0.595006, and |YGL1-YRL1| / |YGL2-YRL2|=|0.8900 19-0.919042| / |0.600271-0.631532|=0.029023 / 0.031261≈0.93=LA, |YGR1-YRR1| / |YGR2-YRR2|=|0.833 917-0.876937| / |0.595006-0.626058|=0.04302 / 0.031052≈1.39=RA, then |RA-LA|=|1.39-0.93|=0.46≤0.47.

[0194] For example, at a viewing angle with an absolute value of less than or equal to 30°, in the display substrate 2 described in Table 2, YRL1 = 0.968045, YRL2 = 0.75342, YRR1 = 0.929173, YRR2 = 0.712642, YGL1 = 0.885915, YGL2 = 0.641404, YGR1 = 0.855736, YGR2 = 0.611596, and |YGL1-YRL1| / |YGL2-YRL2| = |0.885915 -0.968045| / |0.641404-0.75342|=0.08213 / 0.112016≈0.733=LA, |YGR1-YRR1| / |YGR2-YRR2|=|0.855736- 0.929173| / |0.611596-0.712642|=0.073437 / 0.101046≈0.727=RA, then |RA-LA|=|0.727-0.733|=0.006≤0.47.

[0195] For example, when the absolute value of the viewing angle is less than or equal to 30°, in the display substrate 2 described in Table 3, YRL1=0.913043, YRL2=0.679587, YRR1=0.910833, YRR2=0.656743, YGL1=0.842441, YGL2=0.596404, YGR1=0.857582, YGR2=0.61462, |YGL1-YRL1| / |YGL2-YRL2|=0.070602 / 0.083183=0.848755=LA, |YGR1-YRR1| / |YGR2-Y RR2|=0.053251 / 0.042123=1.264179=RA, then |RA-LA|=|1.264179-0.848755|=0.42≤0.47.

[0196] For example, when the absolute value of the viewing angle is greater than or equal to 60°, in the display substrate 3 described in Table 1, YGL3=0.220067, YRL3=0.171873, YGL4=0.147622, ​​YRL4=0.100413, YGR3=0.21933, YRR3=0.179109, YGR4=0.156388, YRR4=0.0996, |YGL3-YRL3|=0.048194=YAL1, |YGL4-YRL4|=0.047209=YAL2, |YGR3-YRR3|=0.040221=YAR1, |YGR4-YRR4|=0.056788=YAR2, then |YAL1 / YAR1|=|0.048194 / 0.040221|≈1.2, and its value range is within 0.5-1.2, and |YAL2 / YAR2|=|0.047209 / 0.056788|≈0.83, and its value range is within 0.5-1.2.

[0197] For example, at a viewing angle with an absolute value of 60° or greater, in the display substrate 3 described in Table 2, YGL3 = 0.218231, YRL3 = 0.199025, YGL4 = 0.137868, YRL4 = 0.108831, YGR3 = 0.20615, YRR3 = 0.18059, YGR4 = 0.128649, YRR4 = 0.095989, |YGL3 - YRL3| = |0.218231 - 0.199025| = 0.019206 = YAL1, |YGL4 - YRL4| = |0.137868 - 0.108831| = 0.02903 7=YAL2, |YGR3-YRR3|=|0.20615-0.18059|=0.02556=YAR1, |YGR4-YRR4|=|0.128649-0.095989|=0.03266=YAR2, then |YAL1 / YAR1|=|0.019206 / 0.02556|≈0.75, its value range is within 0.5-1.2, and its value range is within 0.7-1.2; and |YAL2 / YAR2|=|0.029037 / 0.03266|≈0.89, its value range is within 0.5-1.2, and its value range is within 0.7-1.2.

[0198] For example, at a viewing angle with an absolute value of 60° or greater, in the display substrate 3 described in Table 3, YGL3 = 0.213958, YRL3 = 0.18843, YGL4 = 0.122617, YRL4 = 0.093957, YGR3 = 0.225006, YRR3 = 0.175387, YGR4 = 0.130991, YRR4 = 0.091673, |YGL3 - YRL3| = 0.025528, |YGL4 = 0.122617, YRL4 = 0.093957, YGR3 = 0.225006, YRR3 = 0.175387, YGR4 = 0.130991, YRR4 = 0.091673, |YGL3 - YRL3| = 0.025528 -YRL4|=0.02866=YAL2, |YGR3-YRR3|=0.049619=YAR1, |YGR4-YRR4|=0.039318=YAR2, then |YAL1 / YAR1|=|0.025528 / 0.049619|≈0.51, and its value range is within 0.5-1.2, and |YAL2 / YAR2|=|0.02866 / 0.039318|≈0.73, and its value range is within 0.5-1.2.

[0199] The above relationship can also be derived from other display substrates provided in the embodiments of the present disclosure, and will not be calculated one by one here.

[0200] For example, as shown in FIG6 , the first sub-pixel 101 is a first color sub-pixel, the second sub-pixel 102 is a second color sub-pixel, and the third sub-pixel 103 is a third color sub-pixel.

[0201] As shown in FIG. 6 , the light emitting device EM includes a first electrode E1 , a second electrode E2 , and a light emitting functional layer FL located between the first electrode E1 and the second electrode E2 .

[0202] As shown in FIG6 , the size of the light emitting device EM in a direction perpendicular to the base substrate BS is the minimum size of the stack of the first electrode E1 , the light emitting functional layer FL and the second electrode E2 .

[0203] As shown in FIG6 , the pixel circuit PXC is located on the substrate BS. The first electrode E1 of the light-emitting device EM is connected to the pixel circuit PXC. The pixel circuit PXC is configured to drive the light-emitting device EM connected thereto to emit light. The light-emitting device EM can be independently controlled by the pixel circuit PXC connected thereto.

[0204] As shown in FIG6 , the pixel defining layer PDL includes a main portion MP and a plurality of pixel openings OPN1. The pixel openings OPN1 of the pixel defining layer PDL are configured to expose at least a portion of the first electrode E1 of the light-emitting device EM. The light-emitting area of ​​the light-emitting device EM or the sub-pixel 100 corresponds to the area where the pixel openings OPN1 are located. For example, the pixel defining layer PDL can be a layer of organic insulating material. For example, a thin film of pixel defining material is patterned to form the main portion MP and the plurality of pixel openings OPN1, thereby forming the pixel defining layer PDL. The pixel openings OPN1 of the pixel defining layer PDL can also be referred to as the pixel openings OPN1 of the sub-pixel.

[0205] As shown in Figure 6, the display substrate further includes a planarization layer PLN, and the first electrode E1 is connected to the pixel circuit PXC via a via hole penetrating the planarization layer PLN. For example, the planarization layer PLN may be an organic insulating material layer.

[0206] FIG6 schematically illustrates a pixel circuit PXC, but does not provide a detailed structure of the pixel circuit PXC. Generally speaking, the pixel circuit PXC includes transistors and capacitors. For example, the pixel circuit PXC includes multiple transistors and at least one capacitor. The embodiments of the present disclosure do not limit the specific structure of the pixel circuit PXC. It should be noted that the structure of the display substrate and the structure of the pixel circuit PXC are not limited to those shown in the figure and can be determined as needed.

[0207] FIG7 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure. For example, as shown in FIG7 , the display substrate further includes a light extraction layer CPL, which is configured to extract light emitted by a plurality of sub-pixels 100. The light extraction layer CPL is located on a side of the plurality of sub-pixels 100 that is away from the base substrate BS. The thickness H0 of the light extraction layer CPL is

[0208] In the display substrate provided by the embodiment of the present disclosure, the light extraction layer CPL is thickened to facilitate achieving color shift balance at positive and negative viewing angles.

[0209] As shown in FIG. 7 , the light extraction layer CPL is located on the second electrode E2 .

[0210] For example, as shown in Fig. 7 , the light extraction layer CPL is in contact with the second electrode E2. That is, the light extraction layer CPL is formed directly after the second electrode E2 is formed.

[0211] For example, as shown in FIG7 , the light extraction layer CPL includes a first light extraction layer CPL1 and a second light extraction layer CPL2. The first light extraction layer CPL1 is closer to the base substrate BS than the second light extraction layer CPL2. The thickness of the first light extraction layer CPL1 is The thickness of the second light extraction layer CPL2 is

[0212] In the display substrate provided by the embodiment of the present disclosure, in order to facilitate the color deviation balance at positive and negative viewing angles, the thickness of the first light extraction layer CPL1 is greater than the thickness of the usual light extraction layer, and the thickness of the second light extraction layer CPL2 is greater than the thickness of the usual light extraction layer.

[0213] For example, the thickness of the first light extraction layer CPL1 is greater than the thickness of the second light extraction layer CPL2, so as to improve the light extraction effect.

[0214] For example, the first light extraction layer CPL1 and the second light extraction layer CPL2 may be made of organic materials to improve the reliability of foldable or curved screen products such as mobile phones. For example, the organic materials may be organic materials with aromatic amines or azine as the core.

[0215] For example, as shown in Figure 7, the refractive index of the first light extraction layer CPL1 is greater than the refractive index of the second light extraction layer CPL2, that is, the first light extraction layer CPL1 adopts a high refractive index material, and the second light extraction layer CPL2 adopts a low refractive index material. By matching the high and low refractive indices of the first light extraction layer CPL1 and the second light extraction layer CPL2, a better light extraction effect can be achieved.

[0216] Figure 8 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure. Figure 9 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0217] For example, as shown in Figure 8, the display substrate further includes an encapsulation layer (ECS) configured to encapsulate the light-emitting devices EM to protect them from water and oxygen. The light-emitting devices EM include a first light-emitting device EM1, a second light-emitting device EM2, and a third light-emitting device EM3. The encapsulation layer (ECS) is provided to encapsulate each light-emitting device EM. Figure 8 shows one light-emitting device EM. In the display substrate, all light-emitting devices EM can be encapsulated by the encapsulation layer (ECS).

[0218] For example, as shown in FIG8 , the display substrate further includes a color filter structure CF. The color filter structure CF is located on a side of the encapsulation layer ECS that is away from the base substrate BS.

[0219] As shown in Figures 8 and 9, the color filter structure CF includes a black matrix BM and a filter layer CFL. The black matrix BM has a first opening K21, a second opening K22 and a third opening K23. The filter layer CFL includes a first filter portion FP1, a second filter portion FP2, and a third filter portion FP3. The first filter portion FP1 is configured to transmit the first color light, the second filter portion FP2 is configured to transmit the second color light, and the third filter portion FP3 is configured to transmit the third color light.

[0220] As shown in Figure 8, the black matrix BM has a main body MM and openings OPN2. The openings OPN2 include a first opening K21, a second opening K22, and a third opening K23. For example, a black matrix material film is patterned to form the main body MM and the openings OPN2, thereby forming the black matrix BM.

[0221] As shown in Figure 8, the first filter part FP1 overlaps with the first opening K21 of the black matrix BM in a direction perpendicular to the base substrate BS, the second filter part FP2 overlaps with the second opening K22 of the black matrix BM in a direction perpendicular to the base substrate BS, and the third filter part FP3 overlaps with the third opening K23 of the black matrix BM in a direction perpendicular to the base substrate BS.

[0222] As shown in FIG. 8 , the filter layer CFL overlaps with the pixel opening OPN1 in a direction perpendicular to the base substrate BS, and the filter layer CFL overlaps with the pixel opening OPN1 of the pixel definition layer PDL in a direction perpendicular to the base substrate BS.

[0223] As shown in Figure 9, the first sub-pixel 101 has a first pixel opening K11, the second sub-pixel 102 has a second pixel opening K12, and the third sub-pixel 103 has a third pixel opening K13. The first pixel opening K11 overlaps with the first filter portion FP1 in a direction perpendicular to the base substrate BS, the second pixel opening K12 overlaps with the second filter portion FP2 in a direction perpendicular to the base substrate BS, and the third pixel opening K13 overlaps with the third filter portion FP3 in a direction perpendicular to the base substrate BS.

[0224] As shown in FIG. 9 , the pixel opening OPN1 includes a first pixel opening K11 , a second pixel opening K12 , and a third pixel opening K13 .

[0225] 8 and 9 illustrate the size D1 of the pixel opening OPN1 of the pixel defining layer PDL, the size D2 of the opening OPN2 of the black matrix BM, and the minimum size difference DF between the size D1 of the pixel opening OPN1 of the pixel defining layer PDL and the size D2 of the opening OPN2 of the black matrix BM. For example, the minimum size difference DF may be the minimum distance between the boundary of the pixel opening OPN1 and the boundary of the opening OPN2 of the black matrix BM.

[0226] For example, as shown in Figure 9, the minimum size difference between the first opening K21 of the black matrix BM and the first pixel opening K11 is DF1, the minimum size difference between the second opening K22 of the black matrix BM and the second pixel opening K12 is DF2, and the minimum size difference between the third opening K23 of the black matrix BM and the third pixel opening K13 is DF3, DF1 is different from DF2, and DF1 is different from DF3.

[0227] The display substrate provided by the embodiment of the present disclosure adjusts the light emission of different sub-pixels by making the minimum size difference DF between the pixel opening OPN1 of the sub-pixels emitting light of different colors and the opening OPN2 of the black matrix BM different, thereby reducing or avoiding color deviation and improving the display effect.

[0228] For example, DF1 is smaller than DF2, and DF1 is smaller than DF3. In this case, color shift at a small viewing angle can be reduced or avoided.

[0229] As shown in FIG8 , the encapsulation layer ECS includes a first encapsulation film ECS1, a second encapsulation film ECS2, and a third encapsulation film ECS3. For example, the first encapsulation film ECS1 and the third encapsulation film ECS3 may be inorganic insulating material layers, and the second encapsulation film ECS2 may be an organic insulating material layer. For example, the first encapsulation film ECS1 and the third encapsulation film ECS3 may be manufactured using a chemical vapor deposition process. For example, the second encapsulation film ECS2 may be manufactured using an inkjet printing process. For example, the encapsulation layer ECS may also be referred to as a thin film encapsulation layer. It should be noted that the structure of the encapsulation layer ECS is not limited to that shown in FIG8 and may be determined as needed.

[0230] As shown in Figure 8 , a barrier layer TBL is provided on the encapsulation layer ECS. For example, the barrier layer TBL may be an inorganic insulating material layer, but is not limited thereto.

[0231] As shown in FIG8 , the touch structure TL is located on the barrier layer TBL. The touch structure TL includes a first touch layer TL1 and a second touch layer TL2. An interlayer insulating layer TLD is provided between the first touch layer TL1 and the second touch layer TL2. For example, the interlayer insulating layer TLD can be an inorganic insulating material layer.

[0232] As shown in FIG8 , the barrier layer TOC is disposed on the touch structure TL, and the color filter structure CF is located on the barrier layer TOC.

[0233] As shown in FIG. 8 , the opening OPN2 of the black matrix BM is filled with the filter layer CFL.

[0234] As shown in FIG. 8 , the transparent insulating layer OC is located on the color filter structure CF.

[0235] FIG. 8 also shows a planarization layer PLN on which the light emitting device EM is located.

[0236] FIG8 illustrates an example in which the touch structure TL is located on the encapsulation layer ECS and the color filter structure CF is located on the touch structure TL. However, the embodiments of the present disclosure are not limited thereto; the positions of the color filter structure CF and the touch structure TL may also be swapped. That is, the color filter structure CF is located on the encapsulation layer ECS, and the touch structure TL is located on the color filter structure CF. In this case, the color filter structure CF is closer to the encapsulation layer ECS than the touch structure TL.

[0237] Figure 10 is a cross-sectional view of a display substrate provided in accordance with an embodiment of the present disclosure. Figure 11 is a plan view of a display substrate provided in accordance with an embodiment of the present disclosure. Figure 12 is a cross-sectional view of a display substrate provided in accordance with an embodiment of the present disclosure.

[0238] In the display substrate shown in Fig. 11 , one pixel PX may include one first sub-pixel 101, two second sub-pixels 102, and one third sub-pixel 103. Fig. 11 shows one pixel PX with a dotted-line frame.

[0239] As shown in FIG. 10 and FIG. 12 , the display substrate includes an encapsulation layer ECS on the planarization layer PLN, a barrier layer TBL is disposed on the encapsulation layer ECS, and a touch structure TL is located on the barrier layer TBL.

[0240] As shown in FIG. 10 and FIG. 12 , the barrier layer TOC is located on the touch structure TL. The barrier layer TOC has an opening OPN3 , which can reduce light refraction, thereby improving the optical effect and the display quality of the display substrate.

[0241] 10 to 12 , the opening OPN3 includes a first opening K31 , a second opening K32 , and a third opening K33 . The barrier layer TOC defines the opening OPN3 .

[0242] In the embodiments of the present disclosure, as shown in Figures 10 to 12, the minimum size difference between opening OPN3 and opening OPN1 in sub-pixels emitting light of different colors is different, so as to facilitate adjustment of the light emission conditions of sub-pixels emitting light of different colors and improve display quality. For example, the minimum size difference between the first opening K31 of the barrier layer TOC and the first pixel opening K11 is df1, the minimum size difference between the second opening K32 of the barrier layer TOC and the second pixel opening K12 is df2, and the minimum size difference between the third opening K33 of the barrier layer TOC and the third pixel opening K13 is df3, df1 is different from df2, and df1 is different from df3.

[0243] The display substrate provided by the embodiment of the present disclosure adjusts the light output of different sub-pixels by making the minimum size difference df of the pixel opening OPN1 of the sub-pixels emitting light of different colors and the opening OPN3 of the barrier layer TOC different, thereby reducing or avoiding color deviation and improving the display effect.

[0244] As shown in Figures 11 and 12, to facilitate adjustment of light emission from different sub-pixels, for the same sub-pixel, the area of ​​the opening OPN3 in the barrier layer TOC is smaller than the area of ​​the pixel opening OPN1. Of course, in other embodiments, the size of the opening OPN3 in the barrier layer TOC may also be smaller than or equal to the size of the pixel opening OPN1.

[0245] For example, the area ratio of the opening OPN3 of the barrier layer TOC to the pixel opening OPN1 is 0.9-0.99. Furthermore, the area ratio of the first opening K31 to the first pixel opening K11 is 0.9-0.99, the area ratio of the second opening K32 to the second pixel opening K12 is 0.9-0.99, and the area ratio of the third opening K33 to the first pixel opening K13 is 0.9-0.99.

[0246] Tables 6 to 9 show the size relationship between the opening OPN3 of the barrier layer TOC and the pixel opening OPN1 in the display substrate provided by the embodiments of the present disclosure.

[0247] As shown in Table 6, the size of the pixel opening OPN1 of the first sub-pixel 101 is smaller than the opening OPN3 of the barrier layer TOC, the size of the pixel opening OPN1 of the second sub-pixel 102 is larger than the opening OPN3 of the barrier layer TOC, and the size of the pixel opening OPN1 of the third sub-pixel 103 is larger than the opening OPN3 of the barrier layer TOC.

[0248] As shown in Table 7, the size of the pixel opening OPN1 of the first sub-pixel 101 is smaller than the opening OPN3 of the barrier layer TOC, the size of the pixel opening OPN1 of the second sub-pixel 102 is larger than the opening OPN3 of the barrier layer TOC, and the size of the pixel opening OPN1 of the third sub-pixel 103 is larger than the opening OPN3 of the barrier layer TOC.

[0249] As shown in Table 8, the area of ​​the opening OPN3 of the barrier layer TOC is larger than the area of ​​the pixel opening OPN1.

[0250] As shown in Table 9, the area of ​​the opening OPN3 of the barrier layer TOC is smaller than the area of ​​the pixel opening OPN1.

[0251] The film thickness of the barrier layer TOC refers to the dimension of the barrier layer TOC in a direction perpendicular to the base substrate.

[0252] 10 , 12 and 13 show the slope angle θs of the barrier layer TOC.

[0253] Table 6. Dimensional Relationship between the Opening OPN3 of the Blocking Layer TOC and the Pixel Opening OPN1

[0254] Table 7. Dimensional Relationship between the Opening OPN3 of the Blocking Layer TOC and the Pixel Opening OPN1

[0255] Table 8. Relationship between the area of ​​the opening OPN3 of the barrier layer TOC and the size of the pixel opening OPN1

[0256] Table 9. Relationship between the area of ​​the opening OPN3 of the barrier layer TOC and the size of the pixel opening OPN1

[0257] For example, df1 is greater than df2, and df1 is greater than df3. In this case, color shift at a small viewing angle can be reduced or avoided.

[0258] As shown in FIG12 , the display substrate further includes a functional film layer DR2 . The functional film layer DR2 is disposed on the barrier layer TOC. The functional film layer DR2 can be a high-refractive-index film layer. The functional film layer DR2 is provided to improve light extraction efficiency.

[0259] For example, the refractive index of the functional film layer DR2 may be greater than 1.6, but is not limited thereto.

[0260] For example, the functional film layer DR2 can be a high refractive index layer formed by doping filler particles into a matrix. For example, the matrix material includes an acrylic material or epoxy resin. For example, the filler particles have a particle size on the nanometer scale. For example, the filler particles can include nano-zirconia particles, but are not limited to this and can be selected as needed.

[0261] As shown in Figure 12, the functional film layer DR2 fills the opening OPN3 and contacts the barrier layer TBL. Of course, in other embodiments, other film layers can also be disposed between the functional film layer DR2 and the barrier layer TBL.

[0262] Figure 13 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure. Figure 14 is a plan view of a display substrate provided by an embodiment of the present disclosure.

[0263] For example, as shown in Figures 13 and 14, the display substrate further includes a light-emitting enhancement pattern EMP, which is located on a side of the light-emitting device layer EMLY away from the base substrate BS. The light-emitting device layer EMLY includes a first light-emitting device EM1, a second light-emitting device EM2, and a third light-emitting device EM3. The light-emitting enhancement pattern EMP includes a plurality of light-emitting enhancement portions P0, with a gap G0 between adjacent light-emitting enhancement portions P0. In a plan view, the light-emitting enhancement portion P0 of the light-emitting enhancement pattern EMP located in the first pixel opening K11 is The area of ​​the light enhancement portion P0 of the light enhancement pattern EMP located in the second pixel opening K12 is SFZR, the area of ​​the light enhancement portion P0 of the light enhancement pattern EMP located in the third pixel opening K13 is SFZB, and in a plan view, the area of ​​the first pixel opening K11 is SKR, the area of ​​the second pixel opening K12 is SKG, and the area of ​​the third pixel opening K13 is SKB, SFZR / SKR is smaller than SFZG / SKG and SFZR / SKR is smaller than SFZB / SKB.

[0264] The display substrate provided by the embodiments of the present disclosure is provided with a light emission enhancement pattern EMP to improve forward light emission. SFZR / SKR is smaller than SFZG / SKG, and SFZR / SKR is smaller than SFZB / SKB. This helps reduce light emission at small angles, increases light emission at large angles, and reduces color shift. For example, this helps reduce light emission from the first sub-pixel 101 at small angles, improves light emission from the first sub-pixel 101 at large angles, and reduces color shift. For example, this arrangement can improve the luminous efficiency of the second sub-pixel 102 and the third sub-pixel 103, thereby enhancing display quality.

[0265] For example, as shown in Figures 13 and 14, the light-extraction enhancement portion includes a lens. For example, the lens may be a hemispherical structure, but is not limited thereto.

[0266] Fig. 14 shows the first electrode E1 of the light emitting device EM, the pixel opening OPN1, the light extraction enhancement portion P0, and the interval G0 between the light extraction enhancement portions P0. As shown in Fig. 14, a plurality of light extraction enhancement portions P0 can be evenly arranged.

[0267] FIG13 shows a functional film layer DR2, which covers the light-extraction enhancement pattern EMP. For example, the distance between the surface of the functional film layer DR2 facing away from the light-extraction enhancement pattern EMP and the substrate is greater than the distance between the surface of the light-extraction enhancement pattern EMP facing away from the light-emitting device layer EMLY and the substrate, so that the functional film layer DR2 can cover the light-extraction enhancement pattern EMP.

[0268] For example, the refractive index of the functional film layer DR2 is different from the refractive index of the light extraction enhancement pattern EMP. In some embodiments, the refractive index of the functional film layer DR2 is greater than the refractive index of the light extraction enhancement pattern EMP to facilitate increased forward light extraction. In other embodiments, the refractive index of the functional film layer DR2 is less than the refractive index of the light extraction enhancement pattern EMP to facilitate increased lateral light extraction.

[0269] For other descriptions about the functional film layer DR2, please refer to the previous description and will not be repeated here.

[0270] For example, in the DCI-P3 color gamut (color gamut standard value), the color gamut abscissa of the first subpixel 101 is RX, and the color gamut abscissa of the second subpixel 102 is GX. RX is greater than or equal to 0.686 and less than or equal to 0.688; GX is greater than or equal to 0.254 and less than or equal to 0.265, but is not limited thereto. For example, because the second subpixel 102 is larger, it is less affected by the opening OPN3 of the blocking layer TOC, and the first subpixel 101 and the second subpixel 102 can achieve a higher color gamut. The DCI-P3 color gamut is a parameter that describes the color richness of a display device.

[0271] Fig. 15 is a cross-sectional view of a display substrate provided by an embodiment of the present disclosure. As shown in Fig. 15 , the light-emitting functional layer FL includes a common layer CL and a local layer LL.

[0272] As shown in FIG15 , the common layer CL includes a first common layer CL1 and a second common layer CL2. For example, the first common layer CL1 may include a hole injection layer and a hole transport layer, and the second common layer CL2 may include a hole blocking layer, an electron transport layer, and an electron injection layer. FIG15 illustrates the common layer CL including the first common layer CL1 and the second common layer CL2 as an example, but the embodiments of the present disclosure are not limited thereto. The configuration of the common layer CL can be customized as needed.

[0273] As shown in FIG15 , the local layer LL includes a first local layer LL1, a second local layer LL2, and a third local layer LL3. The local layer LL includes a light-emitting layer. The local layer LL may also include other layers such as a color shift adjustment layer.

[0274] Of course, in other embodiments, the common layer CL and the local layer LL can be set as needed.

[0275] In the embodiment of the present disclosure, the common layer CL may be manufactured using an open mask.

[0276] In the embodiment of the present disclosure, the local layer LL may be manufactured using a fine metal mask (FMM).

[0277] Figure 16 is a plan view of a display substrate provided by an embodiment of the present disclosure. In a high-PPI display substrate, adjacent local layers LL overlap. The overlapping area of ​​the local layers LL is a color mixing area.

[0278] For example, as shown in FIG16 , the area of ​​the color mixing region 1012 of the first sub-pixel 101 and the second sub-pixel 102 is SH12, and the area of ​​the color mixing region 1023 of the second sub-pixel 102 and the third sub-pixel 103 is SH23, where SH23<SH12.

[0279] In the display substrate provided by the embodiment of the present disclosure, SH23<SH12, so as to reduce the color mixing between the second sub-pixel 102 and the third sub-pixel 103 as much as possible, thereby improving the display effect.

[0280] The color mixing area 1012 in Figure 16 is the overlapping area of ​​the local layer LL1 and the local layer LL2. The color mixing area 1023 in Figure 16 is the overlapping area of ​​the local layer LL2 and the local layer LL3.

[0281] FIG17 is a plan view of a display substrate provided by an embodiment of the present disclosure. Adjacent local layers LL overlap. The overlapping region of the local layers LL is a color mixing region.

[0282] For example, as shown in Figure 17, two second sub-pixels 102 are provided around a first sub-pixel 101. The areas of the color mixing regions between the two second sub-pixels 102 and the first sub-pixel 101 are S1 and S2, respectively, and S1 and S2 are different. Figure 17 shows a color mixing region 10121 of the first sub-pixel 101 and the second sub-pixel 102 located to its upper left. Figure 17 also shows a color mixing region 10122 of the first sub-pixel 101 and the second sub-pixel 102 located to its upper right. The area of ​​color mixing region 10121 is S1, and the area of ​​color mixing region 10122 is S2, and S1 and S2 are different. As shown in Figure 17, S1 is smaller than S2.

[0283] The display substrate provided by the embodiment of the present disclosure has a high PPI display substrate. When evaporating the local layer LL, the local layers of sub-pixels of different colors overlap. The areas of the color mixing regions of the first sub-pixel 101 and the two second sub-pixels 102 located around it are different. This can increase the distance between some sub-pixels, thereby reducing the influence of the highly conductive common layer CL on adjacent sub-pixels, reducing or avoiding the accompanying luminescence of adjacent sub-pixels, reducing or avoiding crosstalk, and improving display quality.

[0284] For example, as shown in Figure 17, two other second sub-pixels 102 are provided around the first sub-pixel 101, and the areas of the color mixing areas of the other two second sub-pixels 102 and the first sub-pixel 101 are S3 and S4, respectively, and S3 and S4 are different. Figure 17 shows the color mixing area 10123 of the first sub-pixel 101 and the second sub-pixel 102 located to its lower left. Figure 17 also shows the color mixing area 10124 of the first sub-pixel 101 and the second sub-pixel 102 located to its lower right. The area of ​​the color mixing area 10123 is S3, and the area of ​​the color mixing area 10124 is S4, and S3 and S4 are different. As shown in Figure 17, S3 is smaller than S4. The beneficial effects of this arrangement are similar to those of the arrangements of S1 and S2, and will not be repeated here.

[0285] As shown in FIG17 , four second sub-pixels 102 are provided around the first sub-pixel 101 , and correspondingly, four second sub-pixels 102 are also provided around the third sub-pixel 103 . Thus, the first sub-pixel 101 in the above description can be replaced by the third sub-pixel 103 .

[0286] As shown in FIG17 , two second sub-pixels 102 are disposed around a third sub-pixel 103. The areas of the color mixing regions of the two second sub-pixels 102 and the third sub-pixel 103 are S1 and S2, respectively, and S1 and S2 are different. FIG17 shows a color mixing region 10231 and a color mixing region 10232. The area of ​​the color mixing region 10231 is S1, and the area of ​​the color mixing region 10232 is S2, with S1 being smaller than S2.

[0287] As shown in FIG17 , two other second sub-pixels 102 are disposed around the third sub-pixel 103. The areas of the color mixing regions of the other two second sub-pixels 102 and the third sub-pixel 103 are S3 and S4, respectively, and S3 and S4 are different. FIG17 shows color mixing region 10233 and color mixing region 10234. The area of ​​color mixing region 10233 is S3, and the area of ​​color mixing region 10234 is S4, with S3 being smaller than S4.

[0288] The display substrate provided by the embodiment of the present disclosure is shown in FIG17 . In the straight line direction extending along the 45° angle, the color mixing areas of the local layers of the two sub-pixels emitting light of different colors are discontinuous, and in the straight line direction extending along the 135° angle, the color mixing areas of the local layers of the two sub-pixels emitting light of different colors are discontinuous. In addition, in both directions (the straight line direction extending along the 45° angle and the straight line direction extending along the 135° angle), large-area color mixing areas and small-area color mixing areas alternate. Compared with the case where the overlapping area of ​​the color mixing areas is consistent, the accompanying light emission of adjacent sub-pixels is effectively avoided or reduced, crosstalk is significantly improved, and display quality is enhanced. The straight line direction extending along the 45° angle and the straight line direction extending along the 135° angle are both directions parallel to the surface of the base substrate.

[0289] For example, as shown in Figures 15 and 17, the display substrate also includes a pixel defining layer PDL and a local layer LL, the pixel defining layer PDL has a first pixel opening K11, the local layer LL has a first local layer LL1, the first pixel opening K11 is configured to define the light-emitting area of ​​the first light-emitting device EM1, and the orthographic projection of the first local layer LL1 on the base substrate BS overlaps with the orthographic projection of the first pixel opening K11 on the base substrate BS.

[0290] As shown in Figure 17, for the same first sub-pixel 101, the center AA1 of the first pixel opening K11 does not coincide with the center AA2 of the first local layer LL1. In the embodiment of the present disclosure, the center of the pixel opening and the center of the local layer do not coincide with each other, which means that their geometric centers do not coincide.

[0291] A highly conductive common layer can easily cause crosstalk between adjacent sub-pixels. Because the center of the pixel opening is offset from the center of the local layer, the distance between adjacent sub-pixels can be increased, avoiding the adjacent sub-pixels from emitting light, thereby reducing or avoiding crosstalk on the display substrate.

[0292] As shown in FIG17 , the first sub-pixels 101 and the third sub-pixels 103 are alternately arranged in direction Y. The center of the pixel opening OPN1 of the third sub-pixel 103 does not coincide with the center of the third local layer LL3, and is also offset. That is, for the same third sub-pixel 103, the center AA3 of the third pixel opening K13 does not coincide with the center AA4 of the third local layer LL3.

[0293] 17 illustrates an example in which the first sub-pixel 101 is a red sub-pixel, the second sub-pixel 102 is a green sub-pixel, and the third sub-pixel 103 is a blue sub-pixel. Of course, the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 may also be sub-pixels of other colors.

[0294] For example, as shown in FIG17 , the area of ​​the pixel opening OPN1 (third pixel opening K13) of the third sub-pixel 103 is larger than the area of ​​the pixel opening OPN1 (first pixel opening K11) of the first sub-pixel 101. Since the human eye is less sensitive to blue light than red light, and less sensitive to red light than green light, and red-green crosstalk occurs when the third sub-pixel 103 (blue sub-pixel) is illuminated, affecting the user experience, the overlapping area of ​​the local layers of the third sub-pixel 103 and the second sub-pixel 102 is smaller than the overlapping area of ​​the local layers of the first sub-pixel 101 and the second sub-pixel 102. That is, the overlapping area of ​​the local layers of the blue and green sub-pixels is smaller than the overlapping area of ​​the local layers of the red and green sub-pixels, thereby reducing or avoiding crosstalk.

[0295] For example, on this basis, the double-layer electron blocking layer design of the second sub-pixel 102 (green sub-pixel) is combined (as shown in FIG19 ) to reduce the lateral conduction capability of the second sub-pixel 102 (green sub-pixel) and further reduce crosstalk.

[0296] For example, in some embodiments, as shown in Figure 17, the area of ​​the third pixel opening K13 is larger than the area of ​​the first pixel opening K11. For further example, the area of ​​the first pixel opening K11 is larger than the area of ​​the second pixel opening K12.

[0297] As shown in FIG17 , the pixel openings OPN1 of the first sub-pixel 101 and the third sub-pixel 103 are offset in the same direction. That is, the pixel openings OPN1 of the first sub-pixel 101 and the third sub-pixel 103 are offset in the same direction. FIG17 uses the example of the first pixel opening K11 and the third pixel opening K13 both being offset to the left. In other embodiments, the first pixel opening K11 and the third pixel opening K13 may both be offset to the right.

[0298] For example, as shown in Figure 17, the first sub-pixel 101 and the third sub-pixel 103 are arranged along directions X and Y. For the same first sub-pixel 101, the central axis of the first pixel opening K11 does not coincide with the central axis of the first local layer LL1 in at least one of directions X and Y. Figure 17 uses the example of a situation where the central axis of the first pixel opening K11 is spaced apart from the central axis of the first local layer LL1 by a first gap GP1, and the central axis of the second pixel opening K12 is spaced apart from the central axis of the second local layer LL2 by a second gap GP2. The central axis of the first local layer LL1 and the central axis of the second local layer LL2 can lie on the same straight line or be spaced apart in direction X.

[0299] For example, the first interval GP1 is different from the second interval GP2. For example, the first interval GP1 is larger than the second interval GP2. For example, the distance between the center AA3 and the center AA4 is smaller than the distance between the center AA1 and the center AA2. Embodiments of the present disclosure include but are not limited to the above.

[0300] As shown in FIG17 , the first sub-pixels 101 and the third sub-pixels 103 are alternately arranged in direction Y. The first sub-pixels 101 in the aforementioned description can also be replaced by the third sub-pixels 103. That is, for the same third sub-pixel 103, in at least one of direction X and direction Y, the central axis of the third pixel opening K13 does not coincide with the central axis of the third local layer LL3.

[0301] In the display substrate shown in FIG17 , the central axis of the pixel opening OPN1 and the central axis of the local layer LL are used as an example, respectively. Alternatively, the central axis of the pixel opening OPN1 and the central axis of the local layer LL may be a line connecting the midpoints of opposite sides, and vice versa.

[0302] The display substrate provided by the embodiments of the present disclosure, whether it is set with a center offset or a central axis offset, can reduce or avoid crosstalk.

[0303] FIG17 takes the pixel opening OPN1 as a rounded rectangle and the local layer LL as a rounded rectangle as an example, but the shapes of the pixel opening OPN1 and the local layer LL are not limited to those shown in the figure. For example, other shapes such as rectangle, ellipse, circle, etc. may also be used.

[0304] The sub-pixels included in one pixel PX in the display substrate shown in FIG. 16 and FIG. 17 may refer to the situation shown in FIG. 11 , and are not described again here.

[0305] FIG18 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure. For example, as shown in FIG18 , a third light-emitting device EM3 includes a first electrode E1, a second electrode E2, and a third light-emitting layer EML3 located between the first electrode E1 and the second electrode E2. The third light-emitting layer EML3 includes a first light-emitting sublayer EML31, a second light-emitting sublayer EML32, and a third light-emitting sublayer EML33, which are sequentially arranged. The first light-emitting sublayer EML31 is closer to the first electrode E1 than the third light-emitting sublayer EML33. The content of hole-transporting material in the first light-emitting sublayer EML31 is greater than the content of electron-transporting material in the first light-emitting sublayer EML31, and the content of hole-transporting material in the third light-emitting sublayer EML33 is less than the content of electron-transporting material in the third light-emitting sublayer EML33.

[0306] The display substrate provided by the embodiment of the present disclosure improves the luminous efficiency and the display quality by setting the content of the hole transport material and the electron transport material in the light-emitting sublayer of the third light-emitting layer EML3.

[0307] For example, the content of the hole transport material in the second light-emitting sublayer EML32 can be greater than the content of the electron transport material in the second light-emitting sublayer EML32, thereby forming a step-wise change in the hole transport material in the third light-emitting layer EML3 to improve the luminous efficiency. Of course, in other embodiments, the content of the hole transport material in the second light-emitting sublayer EML32 can be less than or equal to the content of the electron transport material in the second light-emitting sublayer EML32.

[0308] For example, the third light-emitting layer EML3 includes an electron group host, a hole group host, a guest, and a sensitizing material (dopant material). Each sublayer in the third light-emitting layer EML3 can be formed by ternary co-evaporation.

[0309] For example, the sensitizing material may be a material having phosphorescent properties, such as a complex material containing iridium (Ir) or platinum (Pt).

[0310] For example, the materials of the light-emitting layer may include a host material, a guest material, and a sensitizing material. The host material is used to evenly disperse the guest material and the sensitizing material to prevent aggregation and quenching of the guest and sensitizing materials. The sensitizing material can generate excitons, which transfer energy to luminescent centers formed by molecules in the guest material, thereby emitting light. Of course, in some embodiments, the light-emitting layer may not contain a sensitizing material.

[0311] 18 also shows a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL. It should be noted that the layer structure of the third light emitting device EM3 is not limited to that shown in the figure and can be set as needed.

[0312] FIG18 also illustrates a light extraction layer (CPL). The configuration of the CPL can be similar to that described previously and is not limited here. Of course, the structure of the CPL is not limited to that shown in the figure and can be configured as needed. For example, a single-layer light extraction layer can be provided.

[0313] For example, as shown in FIG18 , the thickness Hc of the third light emitting layer EML3 is 10-60 nm.

[0314] In the third light-emitting device EM3 shown in Figure 18, the third light-emitting layer EML3 is a local layer, and at least one of the layers other than the hole injection layer HIL, the hole transport layer HTL, the electron blocking layer EBL, the hole blocking layer HBL, the electron transport layer ETL, and the electron injection layer EIL between the first electrode E1 and the second electrode E2 is a common layer.

[0315] FIG19 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure. For example, as shown in FIG19 , a first light-emitting device EM1 includes a first light-emitting layer EML1 and a first electron blocking layer EBL1 positioned between a first electrode E1 and a second electrode E2. A second light-emitting device EM2 includes a second light-emitting layer EML2 and a second electron blocking layer EBL2 positioned between the first electrode E1 and the second electrode E2. The first light-emitting layer EML1 and the first electron blocking layer EBL1 overlap in a direction perpendicular to a substrate BS, while the second light-emitting layer EML2 and the second electron blocking layer EBL2 overlap in a direction perpendicular to the substrate BS. The thickness of the first electron blocking layer EBL1 is greater than or equal to three times the thickness of the second electron blocking layer EBL2.

[0316] For example, the thickness of the first electron blocking layer EBL1 is The thickness of the second electron blocking layer EBL2 is

[0317] For example, the third light-emitting device EM3 includes a third light-emitting layer EML3 and a third electron blocking layer EBL3 located between the first electrode E1 and the second electrode E2, the third light-emitting layer EML3 and the third electron blocking layer EBL3 overlap in a direction perpendicular to the substrate BS, and the thickness of the second electron blocking layer EBL2 is greater than or equal to the thickness of the third electron blocking layer EBL3.

[0318] In some embodiments, the thickness of the first electron blocking layer EBL1 is The thickness of the second electron blocking layer EBL2 is The thickness of the third electron blocking layer EBL3 is

[0319] In some other embodiments, for example, the thickness of the first electron blocking layer EBL1 is The thickness of the second electron blocking layer EBL2 is The thickness of the third electron blocking layer EBL3 is

[0320] In the case where the display substrate is a display substrate of an in-vehicle device, the thickness of the first electron blocking layer EBL1 is The thickness of the second electron blocking layer EBL2 is The thickness of the third electron blocking layer EBL3 is

[0321] When the display substrate is a display substrate of a mobile phone, the thickness of the first electron blocking layer EBL1 is The thickness of the second electron blocking layer EBL2 is The thickness of the third electron blocking layer EBL3 is

[0322] For example, as shown in FIG19 , the molecular weight of the first electron blocking layer EBL1 is 680-720, and the second electron blocking layer EBL2 includes a first electron blocking sublayer EBL21 and a second electron blocking sublayer EBL22 (a double-layer electron blocking layer). For example, the molecular weight of the first electron blocking sublayer is 640-680, the molecular weight of the second electron blocking sublayer EBL2 is 700-730, and the molecular weight of the third electron blocking layer EBL3 is 620-660.

[0323] In the display substrate provided in the embodiment of the present disclosure, the second electron blocking layer EBL2 includes a first electron blocking sublayer EBL21 and a second electron blocking sublayer EBL22, which is conducive to adjusting the light output of the second sub-pixel 102. This setting is conducive to improving the luminous efficiency of the second light-emitting device EM2 and improving the display quality.

[0324] The first electron blocking layer EBL1, the second electron blocking sublayer EBL2, and the third electron blocking layer EBL3 constitute the electron blocking layer EBL. For example, the material of the electron blocking layer EBL can be selected from hole-type carbazole or aromatic amine derivatives. The materials of the first electron blocking sublayer EBL21 and the second electron blocking sublayer EBL22 can be the same or different.

[0325] For example, for the second sub-pixel 102, the chemical formula of the material of the second electron blocking layer EBL2 is as follows:

[0326] In the above general chemical formula, at least one of the A group, the B group, and the C group is a group M, and those of the A group, the B group, and the C group that are not a group M are selected from an aryl group having 6 to 39 carbon atoms, a heteroaryl group having 5 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, an alkoxy group having 1 to 39 carbon atoms, an arylamino group having 6 to 39 carbon atoms, a cycloalkyl group having 3 to 39 carbon atoms, a heterocycloalkyl group having 3 to 39 carbon atoms, an alkylsilyl group having 1 to 39 carbon atoms, an alkylboryl group having 1 to 39 carbon atoms, an arylboryl group having 6 to 39 carbon atoms, an arylphosphino group having 6 to 39 carbon atoms, or an arylsilyl group having 6 to 39 carbon atoms;

[0327] The general chemical formula of the group M is shown below:

[0328] In the general chemical formula of the group M, X is selected from C or Si; and R is independently selected from an alkyl group having 1 to 39 carbon atoms, a cycloalkyl group having 1 to 39 carbon atoms, an alkenyl group having 2 to 39 carbon atoms, an alkynyl group having 2 to 39 carbon atoms, an aryl group having 6 to 39 carbon atoms, a heteroaryl group having 5 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, an alkoxy group having 1 to 39 carbon atoms, an arylamino group having 6 to 39 carbon atoms, a cycloalkyl group having 3 to 39 carbon atoms, a heterocycloalkyl group having 3 to 39 carbon atoms, an alkylsilyl group having 1 to 39 carbon atoms, an alkylboryl group having 1 to 39 carbon atoms, an arylboryl group having 6 to 39 carbon atoms, an arylphosphino group having 6 to 39 carbon atoms, or an arylsilane group having 6 to 39 carbon atoms. L1 is selected from a single bond, a C6-C15 arylene group, or a C5-C15 heteroarylene group; Ar1 ​​is selected from hydrogen, deuterium, an alkyl group having 1-39 carbon atoms, an alkenyl group having 2-39 carbon atoms, an alkynyl group having 2-39 carbon atoms, an aryl group having 6-39 carbon atoms, a heteroaryl group having 5-60 carbon atoms, an aryloxy group having 6-60 carbon atoms, an alkoxy group having 1-39 carbon atoms, an arylamine group having 6-39 carbon atoms, a cycloalkyl group having 3-39 carbon atoms, a heterocycloalkyl group having 3-39 carbon atoms, an alkylsilyl group having 1-39 carbon atoms, an alkylboryl group having 1-39 carbon atoms, an arylboryl group having 6-39 carbon atoms, an arylphosphino group having 6-39 carbon atoms, or an arylsilyl group having 6-39 carbon atoms.

[0329] The display substrate provided by the present disclosure embodiment, by the chemical structure of the material of the electron blocking layer is limited as above, at least one of the A group, the B group, and the C group is a group M, so that it has at least the following advantages: First, the aromatic amine structure of the electron blocking material is connected to the aromatic group branched by the group M through the X position, which is conducive to increasing the twisting property of the electron blocking material, and then conducive to increasing the stereoscopic property of the electron blocking material, thereby promoting the triplet energy level of the electron blocking material, reaching the purpose of improving the efficiency and life of the organic electroluminescent device. Second, this type of electron blocking material has higher thermal stability, thereby having a higher lifespan. Third, the specific connection mode of this type of electron blocking material makes its HOMO energy level at a suitable level, can reduce the interface energy level difference (Gap), is conducive to the injection of holes, so that holes and electrons are compounded with faster efficiency, reduce charge accumulation, reduce device capacitance, so that the second sub-pixel 102 (green sub-pixel) can show optimal color display effect when synergizing with the third sub-pixel 103 (blue sub-pixel) and the first sub-pixel 101 (red sub-pixel).

[0330] The material of the electron blocking layer of the second sub-pixel 102 mentioned above can be applied to light-emitting devices of other structures in addition to the structure shown in FIG. 19 .

[0331] For example, the thickness of the electron blocking layer EBL does not exceed 10 nm, but is not limited thereto.

[0332] For example, in some embodiments, for the first sub-pixel 101 (red sub-pixel), the first light-emitting layer EML1 includes a host material and a guest material. The host material of the first light-emitting layer EML1 includes a P-type host material and an N-type host material. The chemical structure of the P-type host material is: The chemical structure of the N-type main material is The chemical structure of the guest material of the first light-emitting layer EML1 is The chemical structure of the material of the hole injection layer HIL of the light emitting device EM of the first sub-pixel 101 is The chemical structure of the material of the hole transport layer HTL of the light-emitting device EM of the first sub-pixel 101 is The chemical structure of the material of the electron blocking layer EBL of the light emitting device EM of the first sub-pixel 101 is The chemical structure of the material of the hole blocking layer HBL of the light emitting device EM of the first sub-pixel 101 is The chemical structure of the material of the electron transport layer ETL of the light emitting device EM of the first sub-pixel 101 is

[0333] For example, in some embodiments, for the second sub-pixel 102 (green sub-pixel), the second light-emitting layer EML2 includes a host material and a guest material, and the chemical structure of the host material of the second light-emitting layer EML2 is: The chemical structure of the guest material of the second light-emitting layer EML2 is The chemical structure of the P-type doping material of the second light-emitting layer EML2 is The chemical structure of the material of the hole transport layer HTL of the light-emitting device EM of the second sub-pixel 102 is The chemical structure of the material of the electron blocking layer EBL of the light emitting device EM of the second sub-pixel 102 is

[0334] For example, in some embodiments, for the third sub-pixel 103 (blue sub-pixel), the third light-emitting layer EML3 includes a host material and a guest material, and the chemical structure of the host material of the third light-emitting layer EML3 is: The chemical structure of the guest material of the third light-emitting layer EML3 is The chemical structure of the material of the hole injection layer HIL of the light emitting device EM of the third sub-pixel 103 is: The chemical structure of the material of the hole transport layer HTL of the light-emitting device EM of the third sub-pixel 103 is The chemical structure of the material of the electron blocking layer EBL of the light emitting device EM of the third sub-pixel 103 is:

[0335] For example, for the first sub-pixel 101 (red sub-pixel), the main material of the first light-emitting layer EML1 includes a hole-type material and an electron-type material. The chemical structure of the hole-type material is: The chemical structure of the electronic material is Wherein, D is selected from the fragments shown in the following chemical formula: And wherein # is the fusion site of the dibenzo fragment and the benzene ring fragment, X is selected from any one of O, S, Se, C=O, S(=O)2, CR9R10, SiR9R10, NR9, PR9, P(=O)R9, BR9; L1 and L2 are linking groups, each independently selected from a single bond, a substituted or unsubstituted alkyl chain having 1 to 30 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 6 to 30 carbon atoms, and deuterated derivatives thereof. R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are each independently selected from hydrogen, deuterium, a halogen atom, a nitrile group, a nitro group, a hydroxyl group, a carbonyl group, an ester group, an imide group, an amide group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted substituted alkenyl, substituted or unsubstituted silyl, substituted or unsubstituted boron, substituted or unsubstituted amine, substituted or unsubstituted arylphosphino, substituted or unsubstituted phosphinyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted heterocyclic group, and deuterated derivatives of the above groups, and R1-R10 may optionally be bonded to an adjacent group to form a ring; n1 is an integer selected from 0-4; n2, n3, n4, n5 and n6 are each independently selected from an integer selected from 0-5.

[0336] When the transistors in the pixel circuit are operated at high temperatures for a long time, the characteristic curves of the transistors, such as thin-film transistors (TFTs), will shift, causing the output current of the driving transistor to increase, causing the brightness of the light-emitting device to increase. For example, white light is composed of three primary colors: red, green, and blue (RGB), and the resistance and efficiency of the RGB light-emitting devices are different. The change in RGB brightness caused by the increase in current is different, resulting in color shift at low grayscale. Since the color filter sub-pixel (G) has the highest efficiency and the brightness increases the most, it causes the low grayscale to turn green. Display products such as low-temperature polycrystalline silicon-oxide (LTPO) products do not show obvious changes in low grayscale brightness after long-term high-temperature operation, but the low grayscale green phenomenon still occurs.

[0337] In order to solve the low grayscale greening phenomenon, a double-layer electron blocking layer structure can be used as shown in Figure 19. The molecular weight limit of the electron blocking sublayer mentioned above is to further reduce the low grayscale greening phenomenon.

[0338] For example, with a brightness of 2 nits and 32 grayscales, the display substrate provided by the embodiment of the present disclosure is lit for ten days, and the brightness change value of the sub-pixel (RGB) emitting monochromatic light is less than or equal to plus or minus 10%.

[0339] For example, the molecular weight of the doping material in the first light emitting layer EML1 of the first light emitting device EM1 is in the range of 1000 to 1100. For further example, the molecular weight of the doping material in the first light emitting layer EML1 of the first light emitting device EM1 is 1039.

[0340] For example, the molecular weight of the doping material in the second light emitting layer EML2 of the second light emitting device EM2 is in the range of 1000 to 1100. For further example, the molecular weight of the doping material in the second light emitting layer EML2 of the second light emitting device EM2 is 1039.

[0341] For example, the molecular weight of the doping material in the third light-emitting layer EML3 of the third light-emitting device EM3 is in the range of 1000 to 1100. For further example, the molecular weight of the doping material in the third light-emitting layer EML3 of the third light-emitting device EM3 is 1039.

[0342] For example, the doping materials in the first light emitting layer EML1 of the first light emitting device EM1, the second light emitting layer EML2 of the second light emitting device EM2, and the third light emitting layer EML3 of the third light emitting device EM3 are the same. Of course, the doping materials may also be different.

[0343] For example, as shown in FIG19 , the thickness of the first light emitting layer EML1 is in the range of 35 to 55 nm, the thickness of the second light emitting layer EML2 is in the range of 25 to 40 nm, and the thickness of the third light emitting layer EML3 is in the range of 15 to 35 nm, but is not limited thereto.

[0344] Figure 20 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure. Figure 20 shows a double-stack (Tandem) structure in which the light-emitting device EM of a single sub-pixel 100 includes two light-emitting devices connected in series.

[0345] For example, as shown in FIG. 19 and FIG. 20 , the thickness of the first light emitting device EM1 is in the range of The thickness of the second light emitting device EM2 is in the range of The thickness of the third light emitting device EM3 is in the range of

[0346] As shown in FIG20 , the light emitting device EM of the display substrate includes an N-type doped charge generation layer N-CGL and a P-type doped charge generation layer P-CGL. The N-type doped charge generation layer N-CGL and the P-type doped charge generation layer P-CGL are located between the local layer LL01 and the local layer LL02.

[0347] As shown in FIG. 20 , the local layer of the first light emitting device EM1 includes a color shift adjustment layer and a light emitting layer.

[0348] As shown in FIG. 20 , the local layer LL01 of the first light emitting device EM1 includes a color deviation adjustment layer AL1 - 1 and a light emitting layer EML1 - 1 , and the local layer LL02 of the first light emitting device EM1 includes a color deviation adjustment layer AL1 - 2 and a light emitting layer EML1 - 2 .

[0349] As shown in FIG. 20 , the local layer LL01 of the second light emitting device EM2 includes a color deviation adjustment layer AL2 - 1 and a light emitting layer EML2 - 1 , and the local layer LL02 of the second light emitting device EM2 includes a color deviation adjustment layer AL2 - 2 and a light emitting layer EML2 - 2 .

[0350] As shown in FIG. 20 , the local layer LL01 of the third light emitting device EM3 includes a color deviation adjustment layer AL3 - 1 and a light emitting layer EML3 - 1 , and the local layer LL02 of the third light emitting device EM3 includes a color deviation adjustment layer AL3 - 2 and a light emitting layer EML3 - 2 .

[0351] As shown in FIG20 , the light-emitting device EM of the display substrate includes a hole transport layer HTL, a hole blocking layer HBL, a first electron transport layer ETL-1, and a second electron transport layer ETL-2. The hole transport layer HTL, the hole blocking layer HBL, the first electron transport layer ETL-1, and the second electron transport layer ETL-2 are common layers.

[0352] 19 and 20 illustrate the first electrode layer AE1, which includes a plurality of first electrodes E1 spaced apart from each other. The plurality of first electrodes E1 spaced apart from each other can be shown in FIG15. For simplicity, FIG20 illustrates the first electrode layer AE1.

[0353] 20 shows a light-emitting layer EML11 and a light-emitting layer EML12. The light-emitting layer EML11 includes a light-emitting layer EML1-1, a light-emitting layer EML2-1, and a light-emitting layer EML3-1, and the light-emitting layer EML12 includes a light-emitting layer EML1-2, a light-emitting layer EML2-2, and a light-emitting layer EML3-2.

[0354] Figure 20 also shows a first color deviation adjustment layer AL11 and a second color deviation adjustment layer AL12. The first color deviation adjustment layer AL11 includes a color deviation adjustment layer AL1-1, a color deviation adjustment layer AL2-1, and a color deviation adjustment layer AL3-1, and the second color deviation adjustment layer AL12 includes a color deviation adjustment layer AL1-2, a color deviation adjustment layer AL2-2, and a color deviation adjustment layer AL3-2.

[0355] The first color deviation adjustment layer AL11 and the second color deviation adjustment layer AL12 are provided to reduce the color deviation of the viewing angle.

[0356] For example, the color coordinates, color shift, and other aspects can be optimized by adjusting the thickness of the first color deviation adjustment layer AL11 and / or the second color deviation adjustment layer AL12. For example, the first color deviation adjustment layer AL11 and / or the second color deviation adjustment layer AL12 can be made of organic materials, such as, but not limited to, organic small molecule materials.

[0357] The first color shift adjustment layer AL11 and / or the second color shift adjustment layer AL12 in FIG. 20 may be, but are not limited to, an electron blocking layer EBL. The thickness of the first color shift adjustment layer AL11 and / or the second color shift adjustment layer AL12 can be set similarly to the thickness of the electron blocking layer EBL described above and will not be further described here.

[0358] It should be noted that the layer structure of the light-emitting devices in FIG. 19 and FIG. 20 is not limited to that shown in the figures and can be adjusted as needed.

[0359] The light extraction layer CPL in FIG. 19 and FIG. 20 may refer to the previous description, but is not limited thereto and may also adopt other structures.

[0360] For example, as shown in Figures 19 and 20, the microcavities of the first, second, and third light-emitting devices EM1, EM2, and EM3 can be individually adjusted. For example, the size of the microcavity can be adjusted by adjusting the thickness of the electron blocking layer EBL in Figure 19. For example, the size of the microcavity can be adjusted by adjusting the thickness of the first color shift adjustment layer AL11 and / or the thickness of the second color shift adjustment layer AL12 in Figure 20. Of course, some film layers in the common layer CL can also be arranged in different regions. That is, one or more film layers in the common layer CL of different light-emitting devices can be adjusted to be spaced apart, thereby adjusting the microcavity. For example, the hole injection layers of the first, second, and third light-emitting devices EM1, EM2, and EM3 can be spaced apart. For example, the hole transport layers of the first, second, and third light-emitting devices EM1, EM2, and EM3 can be spaced apart. For example, the charge generation layers of the first, second, and third light-emitting devices EM1, EM2, and EM3 can be spaced apart. For example, at least one of the hole injection layer, hole transport layer, and charge generation layer of different light-emitting devices can be spaced apart. The microcavity here refers to the space between the first electrode E1 and the second electrode E2 where the light-emitting functional layer FL resides. The display substrate can enhance light extraction efficiency through the microcavity effect. The microcavity length can refer to the physical length from the first electrode E1 to the second electrode E2.

[0361] Currently used light-emitting devices, such as OLEDs, mostly adopt a top-emitting device structure, using a reflective first electrode E1 (anode) and a semi-transparent second electrode E2 (cathode) to enhance light extraction efficiency through the microcavity effect.

[0362] For example, the color gamut of the first sub-pixel 101 (BT2020 standard) is greater than or equal to 95%, and the color gamut of the second sub-pixel 102 (BT2020 standard) is greater than or equal to 92.6%. Through microcavity adjustment, the thickness of the color shift adjustment layer or electron blocking layer of the second sub-pixel 102 is reduced, thereby reducing the emission wavelength of the second sub-pixel 102. The thickness of the color shift adjustment layer or electron blocking layer of the first sub-pixel 101 is increased, thereby increasing the emission wavelength of the first sub-pixel 101. As a result, the display substrate provided by the embodiments of the present disclosure can have a higher color gamut.

[0363] Figure 21 is a schematic diagram of a display substrate provided by an embodiment of the present disclosure. For example, as shown in Figure 21 , the display substrate further includes a redundant structure 808. Redundant structure 808 has the same structure as one of the first light-emitting device EM1, the second light-emitting device EM2, and the third light-emitting device EM3. Redundant structure 808 is a non-luminous structure. The inclusion of redundant structure 808 can reduce etching effort and improve production efficiency.

[0364] Fig. 21 shows a first redundant structure 8081, a second redundant structure 8082, and a third redundant structure 8083. The manufacturing process of the display substrate shown in Fig. 21 includes the following steps.

[0365] Step 1) forming a film layer of the first light emitting device EM1 at positions P01, P02, and P03, and then etching away the structures at positions P02 and P03.

[0366] In step 2, a film layer of the second light-emitting device EM2 is formed at positions P01, P02, and P03, and then the structure at position P03 is etched away to form a first redundant structure 8081.

[0367] In step 3, a film layer of the third light-emitting device EM3 is formed at the position P01, the position P02, and the position P03, forming a second redundant structure 8082 and a third redundant structure 8083.

[0368] As shown in FIG21 , the first redundant structure 8081 is identical to the structure of the second light emitting device EM2 , and the second redundant structure 8082 is provided to reduce the etching amount, that is, only the structure where the third light emitting device EM3 is located needs to be etched away.

[0369] As shown in Figure 21, the second redundant structure 8082 has the same structure as the third light emitting device EM3, and the third redundant structure 8083 has the same structure as the third light emitting device EM3. Providing the second redundant structure 8082 and the third redundant structure 8083 can reduce one etching process and save process.

[0370] 21 takes the display substrate as an example having a second redundant structure 8082 and a third redundant structure 8083. In other embodiments, the second redundant structure 8082 is etched away, or both the second redundant structure 8082 and the third redundant structure 8083 are etched away to reduce the thickness of the display substrate.

[0371] As shown in Fig. 21, the display substrate includes a base substrate BS and a pixel circuit layer PXCL. The pixel circuit layer PXCL includes a plurality of pixel circuits PXC.

[0372] FIG21 also illustrates a main portion MP of a pixel definition layer (PDL), a pixel opening (OPN1), a first electrode (E1), a second electrode (E2), a first insulating layer (ISL1), a second insulating layer (ISL2), and a third insulating layer (ISL3). At least one of the first insulating layer (ISL1), the second insulating layer (ISL2), and the third insulating layer (ISL3) may be made of an inorganic insulating material. Examples of such inorganic insulating materials include, but are not limited to, silicon nitride.

[0373] In order to improve the luminous efficiency and enhance the display quality, the display substrate shown in FIG. 21 may be a bottom emission structure.

[0374] It should be noted that FIG. 21 is only an example, and the display substrate provided in the embodiment of the present disclosure may not be provided with the redundant structure 808 .

[0375] Figure 22 is a plan view of a display substrate provided in accordance with an embodiment of the present disclosure. For example, as shown in Figures 15 and 22 , a sub-pixel 100 includes a pixel circuit PXC and a light-emitting device EM. The pixel circuit PXC is configured to drive the light-emitting device EM, which includes a first light-emitting device EM1, a second light-emitting device EM2, and a third light-emitting device EM3. The display substrate also includes data lines DL and power lines PL. The data lines DL are configured to provide a data voltage to the pixel circuit PXC, and the power lines PL are configured to provide a power voltage to the pixel circuit PXC. The data lines DL and the power lines PL are configured to pad the light-emitting device EM.

[0376] According to the embodiment of the present disclosure, the display substrate, the data lines DL, and the power lines PL can level the light-emitting device EM to avoid or reduce color shift at different viewing angles.

[0377] The first sub-pixel included in a pixel PX in the display substrate shown in FIG. 22 can be referred to as that shown in FIG. 11 , and will not be described again here.

[0378] For example, the brightness of the first sub-pixel 101 is greater than or equal to the brightness of the second sub-pixel 102, and the brightness of the second sub-pixel 102 is greater than or equal to the brightness of the third sub-pixel 103. The brightness comparison here can be normalized brightness or brightness measurement value.

[0379] For example, in natural mode or standard mode, the brightness of the first subpixel 101 is greater than or equal to 160 nits, the brightness of the second subpixel 102 is greater than or equal to 130 nits, and the brightness of the third subpixel 103 is greater than or equal to 60 nits.

[0380] For example, in natural or standard mode, the brightness of the white light emitted by the display substrate is greater than or equal to 550 nits. The brightness of the white light emitted by the display substrate is the brightness when the display substrate is operating. Brightness is related to the operating voltage. The greater the brightness, the faster the lifespan decays.

[0381] For example, natural mode or standard mode refers to normal display conditions in daily working environments.

[0382] Figure 23 is a circuit diagram of a pixel circuit and a light-emitting device in a subpixel of a display panel substrate. As shown in Figure 23, the pixel circuit includes transistors T1 to T9, a storage capacitor C1, and a storage capacitor C2. Figure 23 shows nodes N1 to N5, a first power supply voltage terminal VDD, a second power supply voltage terminal VSS, a data line DL, a first reference voltage line REF1, a second reference voltage line REF2, a first initialization line INIT1, a first initialization line INIT2, a first gate line GL1, a second gate line GL2, a third gate line GL3, a fourth gate line GL4, a first light-emission control signal line EM1, and a second light-emission control signal line EM2.

[0383] At least one of transistors T1 to T9 in FIG23 uses an oxide semiconductor as an active layer, and at least one of them uses polysilicon as an active layer to form a pixel circuit with an LTPO structure. For example, at least one of transistors T1 and T2 in FIG23 may use an oxide semiconductor as an active layer, and at least one of transistors T3 to T9 in FIG23 may use polysilicon as an active layer.

[0384] The transistors T1 to T9 of the pixel circuit in FIG23 can be low-temperature polysilicon thin film transistors, or can be oxide thin film transistors, or can be low-temperature polysilicon thin film transistors and oxide thin film transistors. The active layer of the low-temperature polysilicon thin film transistor adopts low-temperature polysilicon (LTPS), and the active layer of the oxide thin film transistor adopts oxide semiconductor (Oxide). Low-temperature polysilicon thin film transistors have the advantages of high mobility and fast charging, and oxide thin film transistors have the advantages of low leakage current. By integrating low-temperature polysilicon thin film transistors and oxide thin film transistors on a display substrate, a display substrate with an LTPO structure is obtained, which can take advantage of the advantages of both, realize low-frequency driving, reduce power consumption, and improve display quality.

[0385] Of course, the pixel circuit of the display substrate provided by the embodiments of the present disclosure is not limited to the 9T2C configuration and can be configured as needed. For example, the number of transistors in the pixel circuit can be 6-11. The transistors in the pixel circuit include at least two active layer materials, wherein the at least two active layer materials include polysilicon and an oxide semiconductor.

[0386] FIG24 is a cross-sectional view of a display surface substrate. As shown in FIG24 , the display surface substrate includes multiple sub-pixels 100. FIG24 shows a first sub-pixel 101 and a second sub-pixel 102. The structure of the third sub-pixel can refer to the structure of the first sub-pixel 101 or the second sub-pixel 102. Multiple pixel circuits PXC and multiple light-emitting devices EM are provided. As shown in FIG24 , pixel circuit PXC includes a transistor TA and a transistor TB. FIG24 shows a light-emitting device EM1 and a light-emitting device EM2. For example, the light-emitting device EM includes an organic light-emitting diode, but is not limited thereto.

[0387] As shown in Figure 24, the display substrate further includes a storage capacitor Cst, which includes a first plate Ca and a second plate Cb. For example, the first plate Ca and the first gate GT1 are located on the same layer, and the second plate Cb and the second gate GT2 are located on the same layer.

[0388] For example, as shown in FIG24 , to facilitate planarization of the first electrode E1, the planarization layer PLN3 includes a planarization sublayer PLN3-1 and a planarization sublayer PLN3-2. The planarization sublayer PLN3-1 is closer to the substrate BS than the planarization sublayer PLN3-2. Of course, in other embodiments, the planarization layer PLN3 may also have a single-layer structure.

[0389] FIG. 24 shows a light emitting functional layer EML located between the first electrode E1 and the second electrode E2 , and the light emitting functional layer EML includes a common layer CL and a local layer LL.

[0390] For example, as shown in FIG24 , the transistor TA includes a first gate electrode GT1, a gate insulating layer GI1, a first active layer AT1, a first electrode Ea, and a second electrode Eb. The first electrode Ea and the second electrode Eb are respectively connected to two ends of the first active layer AT1. A first connecting electrode CE1 is connected to the second electrode Eb. For example, the first active layer AT1 of the transistor TA is made of low-temperature polycrystalline silicon (LTPS), but is not limited thereto.

[0391] For example, as shown in FIG24 , the pixel circuit PXC further includes a transistor TB. Transistor TB includes a second gate electrode GT2, a gate electrode GT3, a gate insulating layer GI2, a gate insulating layer GI3, a second active layer AT2, a third electrode Ec, and a fourth electrode Ed. The third electrode Ec and the fourth electrode Ed are respectively connected to two ends of the second active layer AT2. For example, the second gate electrode GT2 and the gate electrode GT3 of the transistor TB form a dual-gate structure to improve the performance of the transistor TB. For example, the second active layer AT2 of the transistor TB is made of an oxide semiconductor, such as, but not limited to, indium gallium zinc oxide (IGZO).

[0392] For example, as shown in FIG. 24 , the first connection electrode CE1 penetrates the inorganic insulating layer PVX1 and the planarization layer PLN1 .

[0393] For example, as shown in FIG. 24 , the inorganic insulating layer PVX1 is provided on the side of the planarization layer close to the base substrate BS.

[0394] For example, as shown in FIG24 , the first electrode E1 is connected to one of the plurality of pixel circuits PXC via a via hole penetrating at least a portion of the insulating layer ISL. If a connecting electrode is provided, the first electrode E1 is connected to the connecting electrode via a via hole penetrating at least a portion of the insulating layer ISL, and the connecting electrode is then connected to the pixel circuit PXC. If no connecting electrode is provided, the first electrode E1 is connected to the pixel circuit PXC via a via hole penetrating the insulating layer ISL. The connecting electrodes include a first connecting electrode CE1 and a second connecting electrode CE2.

[0395] For example, as shown in FIG24 , the display surface substrate further includes a first connecting element CEa and a second connecting element CEb. The first connecting element CEa and the second connecting element CEb are connected to each other. The first connecting element CEa is located on the planarization layer PLN1, and the second connecting element CEb is located on the planarization layer PLN2. The second connecting element CEb is connected to the first connecting element CEa via a via extending through the planarization layer PLN2. The first connecting element CEa and the first connecting electrode CE1 are located on the same layer, and the second connecting element CEb and the connecting electrode CE2 are located on the same layer.

[0396] For example, as shown in FIG24 , the base substrate BS includes a first base substrate PI1, a first barrier layer BR1, a second base substrate PI2, and a second barrier layer BR2. Of course, the structure of the base substrate BS is not limited to the above description. For example, the base substrate BS may also employ a single-layer structure. As shown in FIG24 , a light shielding layer LS is provided on the base substrate BS to block light and enhance the performance of the transistor TA. The orthographic projection of the light shielding layer LS on the base substrate BS overlaps with the orthographic projection of the first active layer AT1 on the base substrate BS.

[0397] As shown in FIG. 24 , the light shielding layer LS is located between the base substrate BS and the first active layer AT1 .

[0398] For example, in an embodiment of the present disclosure, a sub-pixel may be provided with a light-shielding layer LS. For different sub-pixels, the light-shielding layer LS may have the same or different shapes, and may also have the same or different sizes. For example, the pattern of the light-shielding layer LS may be the same or different for the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103. For example, the pattern of the light-shielding layer LS may be the same or different for the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103.

[0399] As shown in Figure 24, a first buffer layer BF1 is provided on the light-shielding layer LS, a second buffer layer BF2 is provided on the first buffer layer BF1, a second active layer AT2 is provided on the second buffer layer BF2, a gate insulating layer GI1 is provided on the second active layer AT2, a first gate GT1 is located on the gate insulating layer GI1, a buffer layer BF3 is provided on the first gate GT1, a second gate GT2 is provided on the buffer layer BF3, a gate insulating layer GI2 is provided on the second gate GT2, a second active layer AT2 is provided on the gate insulating layer GI2, a gate insulating layer GI3 is provided on the second active layer AT2, an interlayer insulating layer ILD is provided on the gate insulating layer GI3, and a first electrode Ea, a second electrode Eb, a third electrode Ec, and a fourth electrode Ed are provided on the interlayer insulating layer ILD.

[0400] As shown in FIG24 , the display panel further includes a conductive connector Ee, which can be connected to the light shielding layer LS. The conductive connector Ee can be connected to other signal lines, such as a power line providing a constant voltage, to reduce the resistance of the power line. For example, the power line can be a signal line providing a power supply voltage VDD. The conductive connector Ee is located on the interlayer insulating layer ILD and can be provided on the same layer as the first electrode Ea, the second electrode Eb, the third electrode Ec, and the fourth electrode Ed.

[0401] As shown in FIG. 24 , the display panel further includes spacers PS configured to support the fine metal mask during the process of evaporating the local layer LL in the light emitting functional layer EML.

[0402] For example, as shown in FIG. 24 , the spacer PS may be integrated with the pixel definition layer PDL and may be manufactured using a dual-tone mask.

[0403] The local layer LL, the common layer CL, the first common layer CL1 and the second common layer CL2 shown in FIG24 can be referred to the relevant description in FIG15 , which will not be repeated here.

[0404] For example, the transistor TA in FIG. 24 may be the transistor T6 or the transistor T7 in FIG. 23 , and the transistor TB in FIG. 24 may be the transistor T1 or the transistor T2 in FIG. 23 .

[0405] As shown in Figures 9, 11, 16, and 17, the pixels in the display substrate are arranged in a diamond pattern. This diamond-patterned display substrate can be used with an LTPO-structured pixel circuit. Furthermore, a light shielding layer LS can be provided for each sub-pixel.

[0406] The cross-sectional view of the display substrate provided by the embodiment of the present disclosure is not limited to that shown in FIG. 24 and can be set as needed.

[0407] In some figures of the embodiments of the present disclosure, the plan views show directions Y and X, and the cross-sectional views show direction Z. Directions Y and X are both directions parallel to the main surface of the substrate BS. Direction Z is a direction perpendicular to the main surface of the substrate BS. Direction Z is perpendicular to direction X and to direction Y. For example, direction Y and direction X intersect. The embodiments of the present disclosure are described using the example in which direction Y and direction X are perpendicular. As shown in the cross-sectional view, the main surface of the substrate BS is the surface of the substrate BS used to manufacture various components. As shown in the cross-sectional view, the upper surface of the substrate BS is the main surface of the substrate BS.

[0408] The embodiment of the present disclosure is described by taking the first electrode E1 as an anode and the second electrode E2 as a cathode as an example.

[0409] In the embodiment of the present disclosure, the second electrode E2 is a common layer, that is, the second electrodes E2 of a plurality of sub-pixels are connected to each other and form an integrated structure.

[0410] For example, the first electrode E1 is made of a conductive material. For example, the material of the first electrode E1 includes a metal and a conductive metal oxide. For example, the first electrode E1 is a structure in which indium tin oxide (ITO), silver (Ag), and indium tin oxide (ITO) are stacked. The material and structure of the first electrode E1 can be set as needed.

[0411] For example, the second electrode E2 is made of a conductive material. For example, the material of the second electrode E2 includes a metal or an alloy. For example, the material of the second electrode E2 includes a Mg / Ag alloy. The material and structure of the second electrode E2 can be set as needed.

[0412] For example, the second electrodes E2 of different sub-pixels are electrically connected to facilitate providing the same voltage signal.

[0413] In the embodiment of the present disclosure, the first touch layer TL1 and the second touch layer TL2 in the touch structure TL can be made of conductive materials such as metal. The touch structure TL can form a metal grid structure, but is not limited thereto.

[0414] For example, in an embodiment of the present disclosure, the inorganic insulating material layer includes at least one of silicon oxide, silicon nitride, or silicon oxynitride, but is not limited thereto.

[0415] For example, in an embodiment of the present disclosure, the organic insulating material layer includes resin, but is not limited thereto.

[0416] The embodiments of the present disclosure schematically illustrate the pixel circuit PXC without providing a specific structure. It is understood that the pixel circuit PXC includes transistors and capacitors. For example, the pixel circuit PXC includes multiple transistors and at least one capacitor. The embodiments of the present disclosure do not limit the specific structure of the pixel circuit PXC.

[0417] For example, the active layers of transistors in the pixel circuit PXC can be made of polysilicon or oxide semiconductor. When some transistors in the pixel circuit PXC have polysilicon active layers and some have oxide semiconductor active layers, a low-temperature polycrystalline silicon-oxide (LTPO) structure is formed. In embodiments of the present disclosure, a pixel circuit PXC with an LTPO structure can be used. On this basis, a light shielding layer can be provided to improve transistor performance.

[0418] In the embodiment of the present disclosure, the light emitting device EM may be an organic light emitting diode (OLED), but is not limited thereto.

[0419] In the embodiments of the present disclosure, “×” in a formula represents a multiplication sign, and “ / ” represents a division sign, i.e., “÷”.

[0420] The display substrate provided by the embodiments of the present disclosure may also be referred to as a display panel.

[0421] An embodiment of the present disclosure further provides a display device comprising any of the above-mentioned display substrates.

[0422] For example, the display device can be a display device such as an organic light-emitting diode display device, as well as any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, navigator, etc. that includes the display device. The embodiments of the present disclosure include but are not limited to the above.

[0423] For example, the display device includes a vehicle-mounted display device, but is not limited thereto.

[0424] In the embodiments of the present disclosure, the patterning or patterning process may include only photolithography, or may include photolithography and etching steps, or may include other processes such as printing and inkjet printing to form a predetermined pattern. A photolithography process includes film formation, exposure, and development, and utilizes photoresist, a mask, and an exposure machine to form a pattern. The appropriate patterning process may be selected based on the structure to be formed in the embodiments of the present disclosure.

[0425] For example, in the embodiments of the present disclosure, the thickness of a component refers to the dimension of the component in a direction perpendicular to the substrate.

[0426] For the sake of clarity, the thickness of layers or regions is exaggerated in the drawings used to describe the embodiments of the present disclosure. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element can be "directly on" or "under" the other element, or intervening elements may be present.

[0427] In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other.

[0428] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display substrate, comprising: a substrate; and a plurality of sub-pixels, including a first sub-pixel and a second sub-pixel, the first sub-pixel being configured to emit first color light, and the second sub-pixel being configured to emit second color light different in color from the first color light; the first sub-pixel includes a first light-emitting device, and the second sub-pixel includes a second light-emitting device, wherein, the size of the first light-emitting device in the direction perpendicular to the substrate is greater than the size of the second light-emitting device in the direction perpendicular to the substrate, at an A viewing angle and a B viewing angle, the brightness of the first sub-pixel and the brightness of the second sub-pixel satisfy the following relational expression: (YRLA + YRLB) × |B - A| / 2 - (YGLA + YGLB) × |B - A| / 2 = S0; wherein, S0 is a color shift evaluation parameter at the A viewing angle and the B viewing angle, YRLA and YGLA are respectively the brightness of the first sub-pixel and the second sub-pixel at the A viewing angle, YRLB and YGLB are respectively the brightness of the first sub-pixel and the second sub-pixel at the B viewing angle; in the above relational expression, the brightness of the first sub-pixel is a normalized brightness, and the brightness of the second sub-pixel is a normalized brightness; the A viewing angle and the B viewing angle are both negative viewing angles or both positive viewing angles, 0 < |A| < |B| < 45°, |B - A| ≤ 15°, and S0 ≤ 1.

60.

2. The display substrate according to claim 1, wherein, |B - A| ≤ 10°, 0.20 ≤ S0 ≤ 0.

90.

3. The display substrate according to claim 1 or 2, wherein at a viewing angle whose absolute value is less than or equal to 30°, |YGL1 - YRL1| / |YGL2 - YRL2| = LA, |YGR1 - YRR1| / |YGR2 - YRR2| = RA, and |RA - LA| ≤ 0.47, wherein, LA is a color shift evaluation parameter at a left viewing angle, RA is a color shift evaluation parameter at a right viewing angle, YRL1 and YRL2 are respectively the brightness of the first sub-pixel at -15° and -30° viewing angles, YRR1 and YRR2 are respectively the brightness of the first sub-pixel at 15° and 30° viewing angles, YGL1 and YGL2 are respectively the brightness of the second sub-pixel at -15° and -30° viewing angles, YGR1 and YGR2 are respectively the brightness of the second sub-pixel at 15° and 30° viewing angles.

4. The display substrate according to any one of claims 1-3, wherein at a viewing angle whose absolute value is greater than or equal to 60°, |YGL3 - YRL3| = YAL1, and |YGL4 - YRL4| = YAL2, |YGR3 - YRR3| = YAR1, and |YGR4 - YRR4| = YAR2, the value range of |YAL1 / YAR1| is 0.5 - 1.2, and the value range of |YAL2 / YAR2| is 0.5 - 1.2, YAL1 is the brightness difference between the first sub-pixel and the second sub-pixel at -60° viewing angle, YAL2 is the brightness difference between the first sub-pixel and the second sub-pixel at -75° viewing angle, YAR1 is the brightness difference between the first sub-pixel and the second sub-pixel at 60° viewing angle, YAR2 is the luminance difference between the first sub-pixel and the second sub-pixel at a 75° viewing angle. YRL3 and YRL4 are the luminance of the first sub-pixel at -60° and -75° viewing angles respectively. YRR3 and YRR4 are the luminance of the first sub-pixel at 60° and 75° viewing angles respectively. YGL3 and YGL4 are the luminance of the second sub-pixel at -60° and -75° viewing angles respectively. YGR3 and YGR4 are the luminance of the second sub-pixel at 60° and 75° viewing angles respectively.

5. The display substrate according to claim 3 or 4 further includes a light extraction layer, wherein, The light extraction layer is configured to extract the light emitted by the plurality of sub-pixels. The light extraction layer is located on a side of the plurality of sub-pixels facing away from the substrate, and the thickness of the light extraction layer is 6. The display substrate according to claim 5, wherein, The light extraction layer includes a first light extraction layer and a second light extraction layer. The first light extraction layer is closer to the substrate than the second light extraction layer, and the thickness of the first light extraction layer is The thickness of the second light extraction layer is 7. The display substrate according to any one of claims 1-6, wherein, The plurality of sub-pixels further includes a third sub-pixel, the third sub-pixel includes a third light-emitting device, and the third sub-pixel is configured to emit a third color light different from the color of the first color light and different from the color of the second color light.

8. The display substrate according to claim 7 further includes a packaging layer, wherein, The encapsulation layer is configured to encapsulate the first light-emitting device, the second light-emitting device, and the third light-emitting device.

9. The display substrate according to claim 8 further includes a color filter structure, wherein, The color filter structure is located on a side of the encapsulation layer facing away from the substrate. The color filter structure includes a black matrix and a filter layer. The black matrix has a first opening, a second opening, and a third opening. The filter layer includes a first filter portion, a second filter portion, and a third filter portion. The first filter portion is configured to transmit the first color light, the second filter portion is configured to transmit the second color light, and the third filter portion is configured to transmit the third color light. The first filter portion overlaps with the first opening of the black matrix in a direction perpendicular to the substrate. The second filter portion overlaps with the second opening of the black matrix in a direction perpendicular to the substrate. The third filter portion overlaps with the third opening of the black matrix in a direction perpendicular to the substrate. The first sub-pixel has a first pixel opening, the second sub-pixel has a second pixel opening, and the third sub-pixel has a third pixel opening. The first pixel opening overlaps with the first filter portion in a direction perpendicular to the substrate. The second pixel opening overlaps with the second filter portion in a direction perpendicular to the substrate. The third pixel opening overlaps with the third filter portion in a direction perpendicular to the substrate.

10. The display substrate according to claim 9, wherein, The minimum size difference between the first opening of the black matrix and the first pixel opening is DF1. The minimum size difference between the second opening of the black matrix and the second pixel opening is DF2. The minimum size difference between the third opening of the black matrix and the third pixel opening is DF3. DF1 is different from DF2, and DF1 is different from DF3.

11. The display substrate according to claim 10, wherein, DF1 is less than DF2, and DF1 is less than DF3.

12. The display substrate according to any one of claims 8-11 further includes a touch structure and a barrier layer, wherein, The touch structure is located on a side of the encapsulation layer facing away from the substrate. The barrier layer is located on a side of the touch structure facing away from the substrate. The barrier layer has an opening. The opening of the barrier layer overlaps with the pixel opening of the sub-pixel in a direction perpendicular to the substrate, and the size of the opening of the barrier layer is different from the size of the pixel opening of the sub-pixel.

13. The display substrate according to claim 12, wherein, The size of the opening of the barrier layer is smaller than the size of the pixel opening of the sub-pixel.

14. The display substrate according to claim 12 or 13, wherein The ratio of the area of the opening of the barrier layer to the area of the pixel opening of the sub-pixel ranges from 0.9 to 0.

99.

15. The display substrate according to any one of claims 9-11 further includes a light extraction enhancement pattern, wherein, The light extraction enhancement pattern is located on a side of the light-emitting device layer facing away from the substrate, and the light-emitting device layer includes the first light-emitting device, the second light-emitting device, and the third light-emitting device. The light extraction enhancement pattern includes a plurality of light extraction enhancement portions, and there is a gap between adjacent light extraction enhancement portions. In a plan view, the area of the light extraction enhancement portion of the light extraction enhancement pattern located in the first pixel opening is SFZR, the area of the light extraction enhancement portion of the light extraction enhancement pattern located in the second pixel opening is SFZG, and the area of the light extraction enhancement portion of the light extraction enhancement pattern located in the third pixel opening is SFZB. In the plan view, the area of the first pixel opening is SKR, the area of the second pixel opening is SKG, and the area of the third pixel opening is SKB. SFZR / SKR is less than SFZG / SKG and SFZR / SKR is less than SFZB / SKB.

16. The display substrate according to claim 15, wherein, The light extraction enhancement portion includes a lens.

17. The display substrate according to claim 15 or 16 further includes a functional film layer, wherein, The functional film layer covers the light extraction enhancement pattern.

18. The display substrate according to claim 17, wherein, The refractive index of the functional film layer is different from the refractive index of the light extraction enhancement pattern.

19. The display substrate according to claim 18, wherein, The refractive index of the functional film layer is greater than the refractive index of the light extraction enhancement pattern.

20. The display substrate according to any one of claims 7-11, wherein The area of the color mixing region between the first sub-pixel and the second sub-pixel is SH12, and the area of the color mixing region between the second sub-pixel and the third sub-pixel is SH23. The color mixing region is the overlapping region of the local layers in the light-emitting functional layer, and SH23 < SH12.

21. The display substrate according to any one of claims 7-11, wherein, Two second sub-pixels are provided around a first sub-pixel, and the areas of the color mixing regions between the two second sub-pixels and the first sub-pixel are S1 and S2 respectively, and S1 and S2 are different.

22. The display substrate according to claim 21, wherein, Another two second sub-pixels are provided around the first sub-pixel, and the areas of the color mixing regions between the another two second sub-pixels and the first sub-pixel are S3 and S4 respectively, and S3 and S4 are different.

23. The display substrate according to any one of claims 15-19, wherein, In the DCI-P3 color gamut, the color gamut abscissa of the first sub-pixel is RX, and the color gamut abscissa of the second sub-pixel is GX. RX is greater than or equal to 0.686 and less than or equal to 0.688; GX is greater than or equal to 0.254 and less than or equal to 0.

265.

24. The display substrate according to any one of claims 1-23, wherein, Under the BT2020 standard, the color gamut of the first sub-pixel is greater than or equal to 95%, and the color gamut of the second sub-pixel is greater than or equal to 92.6%.

25. The display substrate according to any one of claims 7-11, wherein, The third light-emitting device includes a cathode, an anode, and a third light-emitting layer located between the cathode and the anode. The third light-emitting layer includes a first light-emitting sub-layer, a second light-emitting sub-layer, and a third light-emitting sub-layer arranged in sequence. The first light-emitting sub-layer is closer to the anode than the third light-emitting sub-layer. The content of the hole-transporting characteristic material in the first light-emitting sub-layer is greater than the content of the electron-transporting characteristic material in the first light-emitting sub-layer. The content of the hole-transporting characteristic material in the third light-emitting sub-layer is less than the content of the electron-transporting characteristic material in the third light-emitting sub-layer.

26. The display substrate according to claim 25, wherein, The thickness of the third light-emitting layer is 10 - 60 nm.

27. The display substrate according to any one of claims 1-26, wherein, The first light-emitting device includes a first light-emitting layer and a first electron blocking layer located between the cathode and the anode. The second light-emitting device includes a second light-emitting layer and a second electron blocking layer located between the cathode and the anode. The first light-emitting layer and the first electron blocking layer overlap in a direction perpendicular to the substrate. The second light-emitting layer and the second electron blocking layer overlap in a direction perpendicular to the substrate. The thickness of the first electron blocking layer is greater than or equal to three times the thickness of the second electron blocking layer.

28. The display substrate according to claim 27, wherein The thickness of the first electron blocking layer is The thickness of the second electron blocking layer is 29. The display substrate according to claim 28, wherein, The plurality of sub-pixels further includes a third sub-pixel. The third sub-pixel includes a third light-emitting device. The third sub-pixel is configured to emit a third color light that is different in color from the first color light and different in color from the second color light. The third light-emitting device includes a third light-emitting layer and a third electron blocking layer located between the cathode and the anode. The thickness of the second electron blocking layer is greater than or equal to the thickness of the third electron blocking layer.

30. The display substrate according to claim 29, wherein, The thickness of the first electron blocking layer is The thickness of the second electron blocking layer is The thickness of the third electron blocking layer is 31. The display substrate according to claim 29 or 30, wherein, The thickness of the first electron blocking layer is The thickness of the second electron blocking layer is The thickness of the third electron blocking layer is 32. The display substrate according to any one of claims 29-31, wherein, The molecular weight of the first electron blocking layer is 680 - 720. The second electron blocking layer includes a first electron blocking sub-layer and a second electron blocking sub-layer. The molecular weight of the first electron blocking sub-layer is 640 - 680, and the molecular weight of the second electron blocking sub-layer is 700 - 730. The molecular weight of the third electron blocking layer is 620 - 660.

33. The display substrate according to any one of claims 7-11, wherein, The thickness range of the first light-emitting device is The thickness range of the second light-emitting device is The thickness range of the third light-emitting device is 34. The display substrate according to any one of claims 7-11, wherein, The molecular weight range of the doping material in the first light-emitting layer of the first light-emitting device is 1000 - 1100.

35. The display substrate according to any one of claims 7 to 11, wherein, The molecular weight range of the doping material in the second light-emitting layer of the second light-emitting device is 1000 - 1100.

36. The display substrate according to any one of claims 7-11, wherein, The molecular weight range of the doping material in the third light-emitting layer of the third light-emitting device is 1000 - 1100.

37. The display substrate according to any one of claims 7-11, wherein, The microcavities of the first light-emitting device, the second light-emitting device, and the third light-emitting device are adjusted separately.

38. The display substrate according to claim 37, wherein, The hole injection layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals, and / or the hole transport layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals, and / or the charge generation layers of the first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged at intervals.

39. The display substrate according to any one of claims 7-11 further includes a redundant structure, wherein, The redundant structure is the same as the structure of one of the first light-emitting device, the second light-emitting device, and the third light-emitting device.

40. The display substrate according to any one of claims 7-11, wherein The sub-pixel includes a pixel circuit and a light-emitting device, the pixel circuit is configured to drive the light-emitting device, and the light-emitting device includes the first light-emitting device, the second light-emitting device, and the third light-emitting device. Wherein, the display substrate further includes a data line and a power line, the data line is configured to provide a data voltage to the pixel circuit, the power line is configured to provide a power voltage to the pixel circuit, and the data line and the power line are configured to level the light-emitting device.

41. The display substrate according to any one of claims 7-11, wherein, The brightness of the first sub-pixel is greater than or equal to the brightness of the second sub-pixel, and the brightness of the second sub-pixel is greater than or equal to the brightness of the third sub-pixel.

42. The display substrate according to any one of claims 7-11, wherein, In the natural mode or the standard mode, the brightness of the first sub-pixel is greater than or equal to 160 nits, the brightness of the second sub-pixel is greater than or equal to 130 nits, and the brightness of the third sub-pixel is greater than or equal to 60 nits.

43. The display substrate according to any one of claims 1-42, wherein, In the natural mode or the standard mode, the brightness of the white light of the display substrate is greater than or equal to 550 nits.

44. The display substrate according to any one of claims 1-43 further includes a pixel defining layer, wherein, The light-emitting functional layer of the light-emitting device of the sub-pixel includes a common layer and a local layer, the pixel defining layer has a first pixel opening, the local layer includes a first local layer, the first pixel opening is configured to define the light-emitting area of the first light-emitting device, and the orthographic projection of the first local layer on the substrate overlaps with the orthographic projection of the first pixel opening on the substrate. For the same first sub-pixel, the center of the first pixel opening does not coincide with the center of the first local layer.

45. The display substrate according to any one of claims 7-11 further includes a pixel defining layer, wherein, The light-emitting functional layer of the light-emitting device of the sub-pixel includes a common layer and a local layer, the pixel defining layer has a first pixel opening, the local layer includes a first local layer, the first pixel opening is configured to define the light-emitting area of the first light-emitting device, and the orthographic projection of the first local layer on the substrate overlaps with the orthographic projection of the first pixel opening on the substrate. The first sub-pixel and the third sub-pixel are arranged in a first direction and a second direction. For the same first sub-pixel, in at least one of the first direction and the second direction, the central axis of the first pixel opening does not coincide with the central axis of the first local layer.

46. The display substrate according to claim 45, wherein, The overlapping area of the local layers of the third sub-pixel and the second sub-pixel is smaller than the overlapping area of the local layers of the first sub-pixel and the second sub-pixel.

47. The display substrate according to claim 45 or 46, wherein, The local layer further includes a third local layer, the orthographic projection of the third local layer on the substrate overlaps with the orthographic projection of the third pixel opening of the third sub-pixel on the substrate, and the distance between the center of the pixel opening of the third sub-pixel and the center of the third local layer is smaller than the distance between the center of the pixel opening of the first sub-pixel and the center of the first local layer.

48. The display substrate according to any one of claims 7-11, wherein, The first sub-pixel is configured to emit red light, the second sub-pixel is configured to emit green light, and the third sub-pixel is configured to emit blue light.

49. The display substrate according to any one of claims 7-11, wherein, At the same viewing angle, the difference between the brightness of the second sub-pixel and the brightness of the third sub-pixel is greater than or equal to 0.001 and less than or equal to 0.019, and the brightness of the third sub-pixel is the normalized brightness.

50. A display substrate, comprising: a substrate substrate; and a plurality of sub-pixels, including a first sub-pixel and a second sub-pixel, the first sub-pixel being configured to emit first color light, and the second sub-pixel being configured to emit second color light different from the color of the first color light; the first sub-pixel includes a first light-emitting device, and the second sub-pixel includes a second light-emitting device, wherein, at a viewing angle where the absolute value of the viewing angle is less than or equal to 30°, the following relational expressions are satisfied: |YGL1 - YRL1| / |YGL2 - YRL2| = LA, |YGR1 - YRR1| / |YGR2 - YRR2| = RA, and |RA - LA| ≤ 0.47, wherein, LA is a color shift evaluation parameter at a left viewing angle, and RA is a color shift evaluation parameter at a right viewing angle, YRL1 and YRL2 are the brightnesses of the first sub-pixel at -15° and -30° viewing angles respectively, YRR1 and YRR2 are the brightnesses of the first sub-pixel at 15° and 30° viewing angles respectively, YGL1 and YGL2 are the brightnesses of the second sub-pixel at -15° and -30° viewing angles respectively, YGR1 and YGR2 are the brightnesses of the second sub-pixel at 15° and 30° viewing angles respectively, in the above relational expressions, the brightness of the first sub-pixel is a normalized brightness, and the brightness of the second sub-pixel is a normalized brightness.

51. The display substrate according to claim 50, wherein, At viewing angles A and B, the brightnesses of the first sub-pixel and the second sub-pixel satisfy the following relational expression: (YRLA + YRLB) × |B - A| / 2 - (YGLA + YGLB) × |B - A| / 2 = S0; wherein, S0 is a color shift evaluation parameter at viewing angles A and B, YRLA and YGLA are the brightnesses of the first sub-pixel and the second sub-pixel at viewing angle A respectively, YRLB and YGLB are the brightnesses of the first sub-pixel and the second sub-pixel at viewing angle B respectively; Viewing angles A and B are both negative viewing angles or both positive viewing angles, 0 < |A| < |B| < 45°, |B - A| ≤ 15°, and S0 ≤ 1.

60.

52. The display substrate according to claim 51, wherein, |B - A| ≤ 10°, 0.20 ≤ S0 ≤ 0.

90.

53. A display substrate, comprising: a substrate substrate; and a plurality of sub-pixels, including a first sub-pixel and a second sub-pixel, the first sub-pixel being configured to emit first color light, and the second sub-pixel being configured to emit second color light different from the color of the first color light; the first sub-pixel includes a first light-emitting device, and the second sub-pixel includes a second light-emitting device, wherein, the size of the first light-emitting device in the direction perpendicular to the substrate substrate is larger than the size of the second light-emitting device in the direction perpendicular to the substrate substrate, At viewing angles A1 and B1, the brightnesses of the first sub-pixel and the second sub-pixel satisfy the following relational expression: (YRLA1 + YRLB1) × |B1 - A1| / 2 - (YGLA1 + YGLB1) × |B1 - A1| / 2 = S11; From the A2 viewing angle and the B2 viewing angle, the luminance of the first sub-pixel and the luminance of the second sub-pixel satisfy the following relational expression: (YRLA2 + YRLB2) × |B2 - A2| / 2 - (YGLA2 + YGLB2) × |B2 - A2| / 2 = S22; wherein, S11 is the color shift evaluation parameter from the A1 viewing angle and the B1 viewing angle, and S22 is the color shift evaluation parameter from the A2 viewing angle and the B2 viewing angle. YRLA1 and YGLA1 are respectively the luminance of the first sub-pixel and the luminance of the second sub-pixel from the A1 viewing angle. YRLB1 and YGLB1 are respectively the luminance of the first sub-pixel and the luminance of the second sub-pixel from the B1 viewing angle. YRLA2 and YGLA2 are respectively the luminance of the first sub-pixel and the luminance of the second sub-pixel from the A2 viewing angle. YRLB2 and YGLB2 are respectively the luminance of the first sub-pixel and the luminance of the second sub-pixel from the B2 viewing angle. In the above relational expression, the luminance of the first sub-pixel is the normalized luminance, and the luminance of the second sub-pixel is the normalized luminance. wherein, the A1 viewing angle and the B1 viewing angle are both negative viewing angles or both positive viewing angles, 0 < |A1| < |B1| < 45°, |B1 - A1| ≤ 15°. The A2 viewing angle and the B2 viewing angle are both negative viewing angles or both positive viewing angles, 0 < |A2| < |B2| < 45°, |B2 - A2| ≤ 15°. And, the average value of S11 and S22 is less than or equal to 1.

38.

54. The display substrate according to claim 53, wherein, |B1 - A1| ≤ 10°, |B2 - A2| ≤ 10°, and the average value of S11 and S22 is less than or equal to 0.

38.

55. The display substrate according to any one of claims 1-54, wherein, The first sub-pixel is configured to emit red light, and the second sub-pixel is configured to emit green light or blue light.

56. The display substrate according to any one of claims 1-55, wherein, The sub-pixel includes a pixel circuit and a light-emitting device. The pixel circuit is configured to drive the light-emitting device. The pixel circuit includes at least one transistor with a polysilicon active layer and at least one transistor with an oxide semiconductor active layer. The display substrate includes a light-shielding layer. The positive projection of the active layer in the transistor with the polysilicon active layer on the substrate overlaps with the positive projection of the light-shielding layer on the substrate.

57. A display device, including the display substrate according to any one of claims 1-56.

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