Double-sided display substrate and double-sided display device

Abstract

A double-sided display substrate and a double-sided display device are disclosed. The double-sided display substrate has a first sub-pixel and a second sub-pixel, and includes a substrate, a first electrode layer, and a pixel defining layer. The first electrode layer is disposed on the substrate and includes a first electrode for the first sub-pixel and a second electrode for the second sub-pixel. The second electrode is a light-transmitting electrode. The pixel defining layer is disposed on the side of the first electrode layer away from the substrate and includes a first sub-pixel opening exposing the first electrode and a second sub-pixel opening exposing the second electrode. The first sub-pixel is configured to emit light in a direction away from the substrate, and the second sub-pixel is configured to emit light in a direction toward the substrate. The angle formed between the sidewall of the first sub-pixel opening and the surface of the pixel defining layer near the substrate is a first angle, and the angle formed between the sidewall of the second sub-pixel opening and the surface of the pixel defining layer near the substrate is a second angle. The first angle is acute, and the second angle is obtuse.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a double-sided display substrate and a double-sided display device. Background Technology

[0002] OLED (Organic Light Emitting Diode) display devices have a series of advantages such as self-illumination, high contrast, high definition, wide viewing angle, low power consumption, fast response speed, and low manufacturing cost. As a result, they have become one of the key development directions for next-generation display devices and have therefore received increasing attention.

[0003] In museums, art galleries, shopping malls, and other similar settings, double-sided display devices are often installed to allow more viewers to see the exhibits. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a double-sided display substrate having a first sub-pixel and a second sub-pixel, and including a substrate, a first electrode layer, and a pixel defining layer; the first electrode layer is disposed on the substrate and includes a first electrode for the first sub-pixel and a second electrode for the second sub-pixel, wherein the second electrode is a light-transmitting electrode; the pixel defining layer is disposed on the side of the first electrode layer away from the substrate and includes a first sub-pixel opening exposing the first electrode and a second sub-pixel opening exposing the second electrode; wherein the first sub-pixel is configured to emit light in a direction away from the substrate, and the second sub-pixel is configured to emit light in a direction toward the substrate; the angle formed between the sidewall of the first sub-pixel opening and the surface of the pixel defining layer near the substrate is a first angle, and the angle formed between the sidewall of the second sub-pixel opening and the surface of the pixel defining layer near the substrate is a second angle; the first angle is an acute angle, and the second angle is an obtuse angle.

[0005] For example, in at least one embodiment of the double-sided display substrate provided in this disclosure, the first included angle is 25°~55° and the second included angle is 115°~155°.

[0006] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the second sub-pixel opening includes a first opening portion and a second opening portion disposed on the side of the first opening portion away from the substrate. The angle formed between the sidewall of the first opening portion and the surface of the pixel defining layer near the substrate is the second angle, and the angle formed between the sidewall of the second opening portion and the surface of the pixel defining layer near the substrate is the third angle, wherein the third angle is smaller than the second angle.

[0007] For example, in at least one embodiment of the double-sided display substrate provided in this disclosure, the first included angle is 25°~55°, the second included angle is 115°~155°, and the third included angle is 80°~100°.

[0008] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes a driving circuit layer and a planarization layer; the driving circuit layer is disposed between the substrate and the first electrode layer and includes a first driving circuit, the first driving circuit including a first output terminal and a second output terminal; the planarization layer is disposed between the driving circuit layer and the first electrode layer and includes a first via exposing the first output terminal and a second via exposing the second output terminal, wherein the first electrode is electrically connected to the first output terminal through the first via, and the second electrode is electrically connected to the second output terminal through the second via.

[0009] For example, at least one embodiment of the double-sided display substrate provided in this disclosure further includes: a first light-emitting material layer, a first common electrode, a first encapsulation sub-layer, a second light-emitting material layer, a second common electrode, and a second encapsulation sub-layer; the first light-emitting material layer is disposed in the first sub-pixel opening, the first common electrode is disposed on the side of the first light-emitting material layer away from the substrate, the first encapsulation sub-layer is disposed on the side of the first common electrode away from the substrate, the second light-emitting material layer is disposed in the second sub-pixel opening, the second common electrode is disposed on the side of the second light-emitting material layer away from the substrate, and the second encapsulation sub-layer is disposed on the side of the second common electrode away from the substrate.

[0010] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes: a first light-emitting material layer, a second light-emitting material layer, a first common electrode, a second common electrode, and a first encapsulation layer; the first light-emitting material layer is disposed in the first sub-pixel opening, the second light-emitting material layer is disposed in the second sub-pixel opening and is integrally connected to the first light-emitting material layer, the first common electrode is disposed on the side of the first light-emitting material layer away from the substrate, the second common electrode is disposed on the side of the second light-emitting material layer away from the substrate, and the first encapsulation layer is continuously disposed on the side of the first common electrode and the second common electrode away from the substrate.

[0011] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes a first light-shielding layer and a black matrix layer; the first light-shielding layer is disposed between the substrate and the driving circuit layer and includes a first light-transmitting opening; the black matrix layer is disposed on the side of the first common electrode and the second common electrode away from the substrate and includes a black matrix opening; wherein the distance between the surface of the black matrix layer near the substrate and the surface of the first electrode away from the substrate is H1, the area of ​​the black matrix opening is S10, the distance between the surface of the first light-shielding layer away from the substrate and the surface of the second common electrode near the substrate is H2, the area of ​​the first light-transmitting opening is S2, and H1 / S10=H2 / S2.

[0012] For example, in at least one embodiment of the double-sided display substrate provided in this disclosure, the distance between the edge of the orthographic projection of the second sub-pixel opening on the substrate and the edge of the orthographic projection of the first light-transmitting opening on the substrate is 3μm to 7μm; and / or, the distance between the edge of the orthographic projection of the first sub-pixel opening on the substrate and the edge of the orthographic projection of the black matrix opening on the substrate is 3μm to 7μm.

[0013] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the first sub-pixel or the second sub-pixel includes a first color sub-pixel and a second color sub-pixel with different emission colors. The display substrate further includes: a first isolation pillar disposed on the side of the pixel defining layer away from the substrate and located between the first color sub-pixel and the second color sub-pixel. The first isolation pillar includes a first isolation layer and a second isolation layer disposed on the side of the first isolation layer away from the substrate. In a direction parallel to the substrate, the first isolation layer is recessed relative to the second isolation layer to form an undercut structure.

[0014] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes: a second isolation pillar disposed on the side of the pixel defining layer away from the substrate and located between the first sub-pixel and the second sub-pixel, wherein the second isolation pillar has a trapezoidal cross-section in the direction perpendicular to the substrate.

[0015] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes a driving circuit layer, a first light-shielding layer, and a first color filter layer; the driving circuit layer is disposed between the substrate and the first electrode layer, the first light-shielding layer is disposed between the substrate and the driving circuit layer and includes a first light-transmitting opening, and the first color filter layer is disposed between the first light-shielding layer and the first electrode layer and includes a first color filter pattern, wherein the orthographic projection of the second sub-pixel opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate, and the orthographic projection of the first light-transmitting opening on the substrate is located within the orthographic projection of the first color filter pattern on the substrate.

[0016] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes: a driving circuit layer and a first light-shielding layer; the driving circuit layer is disposed between the substrate and the first electrode layer, and the first light-shielding layer is disposed between the substrate and the driving circuit layer, including a first touch electrode and a first light-transmitting opening, wherein the orthographic projection of the second sub-pixel opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate.

[0017] For example, in at least one embodiment of the double-sided display substrate provided in this disclosure, the driving circuit layer includes a transistor and a second touch electrode. The transistor includes a gate and a source / drain electrode. The second touch electrode is disposed on the same layer as the gate or the source / drain electrode. The first touch electrode is electrically connected to the second touch electrode.

[0018] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes a driving circuit layer and a first planarization layer; the driving circuit layer is disposed between the substrate and the first electrode layer, and the first planarization layer is disposed between the driving circuit layer and the first electrode layer, configured to transmit only light of a first color.

[0019] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the second sub-pixel includes a first color sub-pixel and a second color sub-pixel with different emission colors. The first color sub-pixel is configured to emit light of the first color, and the second color sub-pixel is configured to emit light of the second color. The first planarization layer includes a first color filter opening. The orthographic projection of the sub-pixel opening of the second color sub-pixel on the substrate is located within the orthographic projection of the first color filter opening on the substrate. A second color filter pattern that transmits only the second color light is provided in the first color filter opening. Alternatively, the display substrate further includes a second planarization layer disposed on one side of the first planarization layer and located in the first color filter opening. The second planarization layer includes a second color filter opening, and the orthographic projection of the sub-pixel opening of the first color sub-pixel on the substrate is located within the orthographic projection of the second color filter opening on the substrate.

[0020] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the second sub-pixel further includes a third color sub-pixel, the emission color of which is different from the emission colors of the first color sub-pixel and the second color sub-pixel. The first planarization layer further includes a third color filter opening, the orthographic projection of the sub-pixel opening of the third color sub-pixel on the substrate is located within the orthographic projection of the third color filter opening on the substrate, and a third color filter pattern that transmits only third color light is provided in the third color filter opening. Alternatively, the display substrate further includes a third planarization layer disposed on one side of the first planarization layer and located in the third color filter opening, wherein the third planarization layer includes a fourth color filter opening and a fifth color filter opening, the orthographic projection of the sub-pixel opening of the second color sub-pixel on the substrate is located within the orthographic projection of the fourth color filter opening on the substrate, and the orthographic projection of the sub-pixel opening of the first color sub-pixel on the substrate is located within the orthographic projection of the fifth color filter opening on the substrate.

[0021] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the first sub-pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel, and the second sub-pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel. The first sub-pixel is arranged in row N, and the second sub-pixel is arranged in row N+1, where N is a positive integer greater than or equal to 1. The first red sub-pixel and the second red sub-pixel are arranged in the same column, the first green sub-pixel and the second green sub-pixel are arranged in the same column, and the first blue sub-pixel and the second blue sub-pixel are arranged in the same column.

[0022] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the first sub-pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel; the second sub-pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel; the second red sub-pixel and the second green sub-pixel are alternately arranged in column M; the second blue sub-pixel is arranged in column M+1, where M is a positive integer greater than or equal to 1; the first blue sub-pixel is arranged in column M+2; and the first red sub-pixel and the first green sub-pixel included in the first sub-pixel are alternately arranged in column M+3.

[0023] For example, in a double-sided display substrate provided in at least one embodiment of this disclosure, the first green sub-pixel and the second green sub-pixel are arranged in row X, where X is a positive integer greater than or equal to 1; the first red sub-pixel and the second red sub-pixel are arranged in row X+1; the first blue sub-pixel includes a first part and a second part arranged consecutively, the first part being located in row X and the second part being located in row X+1; the second blue sub-pixel includes a third part and a fourth part arranged consecutively, the third part being located in row X and the fourth part being located in row X+1.

[0024] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes a driving circuit layer and a black planarization layer; the driving circuit layer is disposed between the substrate and the first electrode layer, the black planarization layer is disposed between the driving circuit layer and the first electrode layer, and includes a first light-emitting opening, in which a first color filter pattern is disposed.

[0025] For example, at least one embodiment of the present disclosure provides a double-sided display substrate that further includes: a first light-shielding layer disposed between the substrate and the driving circuit layer, including a first light-transmitting opening, wherein the orthographic projection of the first light-transmitting opening on the substrate is located within the orthographic projection of the first light-emitting opening on the substrate.

[0026] For example, at least one embodiment of the double-sided display substrate provided in this disclosure further includes: a black matrix layer disposed on the side of the pixel defining layer away from the substrate, including a black matrix opening, the distance between the surface of the black matrix layer near the substrate and the surface of the first electrode away from the substrate is H1, the area of ​​the black matrix opening is S10, the distance between the surface of the first color filter pattern near the substrate and the surface of the second common electrode near the substrate is H3, the area of ​​the first light-emitting opening is S3, the distance between the surface of the first light-shielding layer away from the substrate and the surface of the second common electrode near the substrate is H2, the area of ​​the first light-transmitting opening is S2, and H1 / S10=H3 / S3≥H2 / S2.

[0027] For example, in at least one embodiment of the present disclosure, the double-sided display substrate includes a first substrate portion overlapping with the second sub-pixel opening and a second substrate portion other than the first substrate portion in a direction perpendicular to the substrate. The thickness of the first substrate portion is less than the thickness of the second substrate portion, or the first substrate portion is hollowed out.

[0028] At least one embodiment of this disclosure provides a double-sided display device, which includes a double-sided display substrate provided in the embodiments of this disclosure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0030] Figure 1 This is a plan view of a double-sided display substrate provided in at least one embodiment of the present disclosure;

[0031] Figure 2 for Figure 1 A schematic cross-sectional view of the double-sided display substrate along line AA;

[0032] Figure 3 A cross-sectional schematic diagram of the first sub-pixel opening of a double-sided display substrate provided in at least one embodiment of this disclosure;

[0033] Figure 4 and Figure 5 A cross-sectional schematic diagram of the second sub-pixel opening of a double-sided display substrate provided in an embodiment of this disclosure;

[0034] Figures 6-11 This is a partial cross-sectional schematic diagram of different double-sided display substrates provided in the embodiments of this disclosure;

[0035] Figures 12-14 This is a partial planar schematic diagram of different double-sided display substrates provided in the embodiments of this disclosure;

[0036] Figure 15 Another planar schematic diagram of a double-sided display substrate provided in at least one embodiment of this disclosure; and

[0037] Figures 16-24 This is a partial cross-sectional schematic diagram of different double-sided display substrates provided in the embodiments of this disclosure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0039] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0040] As mentioned above, double-sided display devices are widely used in museums, art galleries, shopping malls, and other settings. However, traditional double-sided display devices have low resolution and poor consistency between the two sides, making it difficult to meet user needs.

[0041] In this regard, at least one embodiment of the present disclosure provides a double-sided display substrate having a first sub-pixel and a second sub-pixel, and including a substrate, a first electrode layer and a pixel defining layer; the first electrode layer is disposed on the substrate and includes a first electrode for the first sub-pixel and a second electrode for the second sub-pixel, the second electrode being a light-transmitting electrode; the pixel defining layer is disposed on the side of the first electrode layer away from the substrate and includes a first sub-pixel opening exposing the first electrode and a second sub-pixel opening exposing the second electrode; the first sub-pixel is configured to emit light in a direction away from the substrate, and the second sub-pixel is configured to emit light in a direction toward the substrate; the angle formed between the sidewall of the first sub-pixel opening and the surface of the pixel defining layer near the substrate is a first angle, and the angle formed between the sidewall of the second sub-pixel opening and the surface of the pixel defining layer near the substrate is a second angle; the first angle is an acute angle, and the second angle is an obtuse angle.

[0042] In the double-sided display substrate provided in this embodiment, the first sub-pixel is configured to emit light in a direction away from the substrate, forming a top-emitting sub-pixel, and the second sub-pixel is configured to emit light in a direction toward the substrate, forming a bottom-emitting sub-pixel. This achieves double-sided display. The pixel delimiting layer has different opening designs for the first sub-pixel opening corresponding to the top-emitting sub-pixel and the second sub-pixel opening corresponding to the bottom-emitting sub-pixel, which can make the light emission angle of the double-sided display reach the same level, thereby improving the consistency of the double-sided display.

[0043] The following describes the double-sided display substrate and double-sided display device provided in this disclosure through several specific embodiments.

[0044] This disclosure provides at least one embodiment of a double-sided display substrate. Figure 1 A planar schematic diagram of the double-sided display substrate is shown. Figure 2 A schematic cross-sectional view of the double-sided display substrate along line AA is shown, as follows. Figure 1 and Figure 2 As shown, the double-sided display substrate has a first sub-pixel SP1 and a second sub-pixel SP2, and includes a substrate 10, a first electrode layer 20 and a pixel defining layer 30.

[0045] A first electrode layer 20 is disposed on the substrate 10. The first electrode layer 20 includes a first electrode E11 for a first sub-pixel SP1 and a second electrode E1 for a second sub-pixel SP2. The second electrode E1 is a light-transmitting electrode. The first sub-pixel SP1 is configured to emit light along a direction R1 away from the substrate 10, for example, it is formed as a top-emitting sub-pixel. The second sub-pixel SP2 is configured to emit light along a direction R2 toward the substrate 10, for example, it is formed as a bottom-emitting sub-pixel. By designing the second electrode E1 as a light-transmitting electrode, the second electrode E1 can fully transmit the light emitted by the second sub-pixel SP2.

[0046] The pixel defining layer 30 is disposed on the side of the first electrode layer 20 away from the substrate 10. The pixel defining layer 30 includes a first sub-pixel opening 31 exposing the first electrode E11 and a second sub-pixel opening 32 exposing the second electrode E1. For example, Figure 3 It shows Figure 2 A cross-sectional schematic diagram of the opening of the first sub-pixel on the display substrate, as shown in the figure. Figure 3 As shown, the angle formed between the sidewall 31A of the first sub-pixel opening 31 and the surface 30A of the pixel defining layer 30 near the substrate 10 is the first included angle α. Figure 4 It shows Figure 2 A cross-sectional schematic diagram of the second sub-pixel opening of the display substrate, as shown in the figure. Figure 4As shown, the angle formed between the sidewall 32A of the second sub-pixel opening 32 and the surface 30A of the pixel defining layer 30 near the substrate 10 is the second included angle b, the first included angle a is an acute angle, and the second included angle b is an obtuse angle.

[0047] Therefore, in the light-emitting direction R1 of the first sub-pixel SP1, the opening 31 of the first sub-pixel gradually increases in size, such as... Figure 3 As shown, the opening area of ​​the first sub-pixel opening 31 on the side away from the substrate 10 is larger than the opening area of ​​the first sub-pixel opening 31 on the side close to the substrate 10; in the light emission direction R2 of the second sub-pixel SP2, the second sub-pixel opening 32 also shows a gradually increasing trend, and the opening area of ​​the second sub-pixel opening 32 on the side close to the substrate 10 is larger than the opening area of ​​the second sub-pixel opening 32 on the side away from the substrate 10; thereby, the light emission angles of the double-sided display can be made to reach the same level, thereby improving the consistency of the double-sided display.

[0048] For example, in some embodiments, the first included angle α is 25°~55°, such as 25°, 30°, 35°, 40°, 45°, 50° or 55°; the second included angle b is 115°~155°, such as 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150° or 155°. This allows the desired light emission angle to be achieved.

[0049] For example, Figure 5 It shows Figure 2 Another cross-sectional schematic diagram of the second sub-pixel opening of the display substrate, as shown in the figure. Figure 5 As shown, in some other embodiments, the second sub-pixel opening 32 includes a first opening portion 321 and a second opening portion 322 disposed on the side of the first opening portion 321 away from the substrate 10. The angle formed between the sidewall 32A1 of the first opening portion 321 and the surface 30A of the pixel defining layer 30 near the substrate 10 is a second angle b. The angle formed between the sidewall 32A2 of the second opening portion 322 and the surface 30A of the pixel defining layer 30 near the substrate 10 is a third angle c. The third angle c is smaller than the second angle b.

[0050] For example, the first included angle α is 25°~55°, such as 25°, 30°, 35°, 40°, 45°, 50° or 55°; the second included angle b is 115°~155°, such as 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150° or 155°; the third included angle c is 80°~100°, such as 80°, 85°, 90°, 95° or 100°; for example, in some embodiments, the sidewall 32A2 of the second opening portion 322 is perpendicular to the surface 30A of the pixel defining layer 30 near the substrate 10, in which case the third included angle c is 90°.

[0051] For example, in the fabrication process of the display substrate, the pixel defining layer 30 can be fabricated using photolithography. In order to achieve sub-pixel openings with different slope angles, a half-tone mask or a gray-tone mask can be used for photolithography.

[0052] For example, the pixel defining layer 30 can be made of a black material, such as a black organic material. The light transmittance of the halftone mask or grayscale mask corresponding to the part forming the second sub-pixel opening 32 is low, so as to reduce the exposure intensity of the material forming the second sub-pixel opening 32, so as to facilitate the formation of the second angle b.

[0053] For example, in Figure 2 In the first sub-pixel opening 31, the cross-section is an inverted trapezoidal structure, and the cross-section of the second sub-pixel opening 32 is a regular trapezoidal structure. For example, due to manufacturing process reasons, the sidewall 31A of the first sub-pixel opening 31 and the sidewall 32A of the second sub-pixel opening 32 may be arc-shaped. In this case, the angle formed between the sidewall of the first sub-pixel opening 31 / the second sub-pixel opening 32 and the surface 30A of the pixel defining layer 30 near the substrate 10 is the angle formed between the tangent of the arc portion near the surface 30A and the surface 30A of the pixel defining layer 30 near the substrate 10.

[0054] For example, such as Figure 2 As shown, the display substrate also includes a driving circuit layer 40 and a planarization layer 50. The driving circuit layer 40 is disposed between the substrate 10 and the first electrode layer 20. The driving circuit layer 40 includes a first driving circuit 41, which includes a first output terminal 41A and a second output terminal 41B. The planarization layer 50 is disposed between the driving circuit layer 40 and the first electrode layer 20. The planarization layer 50 includes a first via V1 exposing the first output terminal 41A and a second via V2 exposing the second output terminal 41B. The first electrode E11 is electrically connected to the first output terminal 41A through the first via V1, and the second electrode E12 is electrically connected to the second output terminal 41B through the second via V2.

[0055] Therefore, a first driving circuit 41 can drive two sub-pixels, namely the first sub-pixel SP1 and the second sub-pixel SP2, to achieve the effect of "one driving two". This can simplify the circuit layout of the display substrate, improve the resolution and aperture ratio of the display substrate, improve the light emission efficiency of double-sided display, reduce power consumption, and extend the display life.

[0056] For example, in some embodiments, the display substrate further includes a first connecting electrode C1 and a second connecting electrode C2, which are disposed on the side of the planarization layer 50 away from the substrate 10. The display substrate also includes another planarization layer 60, which is disposed on the side of the first connecting electrode C1 and the second connecting electrode C2 away from the substrate. The planarization layer 60 includes vias that expose the first connecting electrode C1 and the second connecting electrode C2 respectively. In this case, the first electrode E11 is electrically connected to the first connecting electrode C1 through the via in the planarization layer 60, and the first connecting electrode C1 is electrically connected to the first output terminal 41A through the first via V1, thereby realizing the electrical connection between the first electrode E11 and the first output terminal 41A. The second electrode E12 is electrically connected to the second connecting electrode C2 through the via in the planarization layer 60, and the second connecting electrode C2 is electrically connected to the second output terminal 41B through the second via V2, thereby realizing the electrical connection between the second electrode E12 and the second output terminal 41B.

[0057] For example, a first driving circuit 41 drives a first sub-pixel SP1 and a second sub-pixel SP2 to emit light of the same color, such as red, green or blue light, to achieve consistency in double-sided display.

[0058] For example, the first driving circuit 41 includes structures such as transistor TFTs and storage capacitors, and can be formed in various forms such as 2T1C (including two transistor TFTs and one storage capacitor), 3T1C (including three transistor TFTs and one storage capacitor), 7T1C (including seven transistor TFTs and one storage capacitor), 8T1C (including eight transistor TFTs and one storage capacitor) or 8T2C (including eight transistor TFTs and two storage capacitors). The embodiments disclosed herein do not specifically limit this.

[0059] For example, such as Figure 2 As shown, the transistor TFT includes an active layer A1, a gate G1, a source TS1, a first drain D1, and a second drain D2. The first drain D1 can be implemented as the first output terminal 41A mentioned above, and the second drain D2 can be implemented as the second output terminal 41B mentioned above.

[0060] For example, the conductive layer containing the source TS1, the first drain D1, and the second drain D2 can be called the first source-drain conductive layer, and the conductive layer containing the first connecting electrode C1 and the second connecting electrode C2 can be called the second source-drain conductive layer. Other signal lines, such as data lines, can also be set in the first source-drain conductive layer and the second source-drain conductive layer. The setting of the dual source-drain conductive layer facilitates the arrangement of these signal lines.

[0061] For example, such as Figure 2 As shown, the display substrate also includes a first light-emitting material layer E21 and a first common electrode E31. The first light-emitting material layer E21 is disposed in the first sub-pixel opening 31, and the first common electrode E31 is disposed on the side of the first light-emitting material layer E21 away from the substrate 10. The first electrode E11, the first light-emitting material layer E21 and the first common electrode E31 constitute the light-emitting device of the first sub-pixel SP1, and the light-emitting device of the first sub-pixel SP1 is formed as a top-emitting light-emitting device.

[0062] For example, the first electrode E11 of the top-emitting light-emitting device can reflect light so that the light emitted by the top-emitting light-emitting device can be emitted along the direction R1. For example, the first electrode E11, as the anode of the top-emitting light-emitting device, can adopt an ITO / Ag / ITO stacked structure. The first common electrode E31, as the cathode of the top-emitting light-emitting device, is a light-transmitting electrode and can be made of metal materials such as Mg and Ag. For example, the first common electrode E31 is relatively thin, about 10 nm, and has high light transmittance, forming a semi-permeable film layer.

[0063] For example, such as Figure 2 As shown, the display substrate also includes a second light-emitting material layer E22 and a second common electrode E32. The second light-emitting material layer E22 is disposed in the second sub-pixel opening 32, and the second common electrode E32 is disposed on the side of the second light-emitting material layer E22 away from the substrate 10. The second electrode E12, the second light-emitting material layer E22, and the second common electrode E32 constitute the light-emitting device of the second sub-pixel SP2. The light-emitting device of the second sub-pixel SP2 is formed as a bottom-emitting light-emitting device.

[0064] For example, the first electrode E21 of the bottom-emitting light-emitting device is a light-transmitting electrode so that the light emitted by the bottom-emitting light-emitting device can be fully emitted along the direction R2. For example, the first electrode E21, as the anode of the bottom-emitting light-emitting device, can be made of light-transmitting conductive materials such as ITO or IGZO. The first common electrode E32, as the cathode of the bottom-emitting light-emitting device, can reflect light and can be made of opaque conductive materials. For example, Ag can be used. In this case, the cathode can be thicker to achieve a light-blocking effect.

[0065] For example, such as Figure 2As shown, the display substrate also includes a first encapsulation layer EN1, which is continuously disposed on the side away from the substrate 10 of the first common electrode E31 and the second common electrode E32, so as to encapsulate multiple sub-pixels simultaneously.

[0066] For example, in Figure 2 In this embodiment, the first light-emitting material layer E21 and the second light-emitting material layer E22 are respectively disposed in the first sub-pixel opening 31 and the second sub-pixel opening 32. During the fabrication of the display substrate, the first light-emitting material layer E21 and the first common electrode E31 of the top-emitting light-emitting device can be deposited using a fine metal mask (FMM), and then photolithography is performed to form the required pattern. Then, the second light-emitting material layer E22 and the second common electrode E32 of the bottom-emitting light-emitting device are deposited using a fine metal mask, and then photolithography is performed to form the required pattern. Finally, the first encapsulation layer EN1 is formed on the first common electrode E31 and the second common electrode E32 by deposition or other methods. For example, the first encapsulation layer EN1 is an inorganic encapsulation layer, and can be made of materials such as silicon oxide, silicon nitride, or silicon oxynitride.

[0067] Alternatively, during the fabrication of the display substrate, a fine metal mask (FMM) can be used to deposit the first light-emitting material layer E21 of the top-emitting light-emitting device and the second light-emitting material layer E22 of the bottom-emitting light-emitting device. Then, a first common electrode E31 can be deposited using a fine metal mask (FMM) and photolithography can be performed to form the desired pattern. After that, a second common electrode E32 of the bottom-emitting light-emitting device can be deposited using a fine metal mask and photolithography can be performed to form the desired pattern. Finally, a first encapsulation layer EN1 can be formed on the first common electrode E31 and the second common electrode E32 by deposition or other methods.

[0068] For example, in some other embodiments, the first sub-pixel SP1 and the second sub-pixel SP2, which are arranged adjacently, can be sub-pixels that emit the same color of light. In this case, such as Figure 6 As shown, the first light-emitting material layer E21 and the second light-emitting material layer E22 can be continuously arranged, that is, the first light-emitting material layer E21 and the second light-emitting material layer E22 are integrally connected. They can be integrally formed using the same material during the preparation process. At this time, the light-emitting materials of the first light-emitting material layer E21 and the second light-emitting material layer E22 are also formed on the isolation wall 33 between the first sub-pixel opening 31 and the second sub-pixel opening 32 and on the sidewall.

[0069] In the fabrication process of the aforementioned display substrate, a fine metal mask (FMM) can be used to deposit the first light-emitting material layer E21 of the top-emitting light-emitting device and the second light-emitting material layer E22 of the bottom-emitting light-emitting device. Then, a first common electrode E31 can be deposited using a fine metal mask (FMM) and photolithography can be performed to form the required pattern. After that, a second common electrode E32 of the bottom-emitting light-emitting device can be deposited using a fine metal mask and photolithography can be performed to form the required pattern. Finally, a first encapsulation layer EN1 can be formed on the first common electrode E31 and the second common electrode E32 by deposition or other methods.

[0070] For example, in some embodiments, the encapsulation layers on the first common electrode E31 and the second common electrode E32 are not continuously disposed, for example, as shown in the figure. Figure 7 As shown, the display substrate also includes a first encapsulation sublayer EN11 and a second encapsulation sublayer E12. The first encapsulation sublayer EN11 is disposed on the side of the first common electrode E31 away from the substrate 10 to encapsulate the light-emitting device of the first sub-pixel SP1. The second encapsulation sublayer E12 is disposed on the side of the second common electrode E32 away from the substrate 10 to encapsulate the light-emitting device of the second sub-pixel SP2.

[0071] For example, the first encapsulation sublayer EN11 and the second encapsulation sublayer E12 are inorganic encapsulation layers, which can be made of materials such as silicon oxide, silicon nitride, or silicon oxynitride.

[0072] In the above-mentioned display substrate preparation process, after the first common electrode E31 is prepared, a first encapsulation sublayer EN11 can be formed on the first common electrode E31 using photolithography. After the second common electrode E32 is prepared, a second encapsulation sublayer E12 can be formed on the second common electrode E32 using photolithography.

[0073] Alternatively, during the fabrication of the aforementioned display substrate, a first light-emitting material layer E21, a first common electrode E31, and a first encapsulation layer EN11 for the first sub-pixel SP1 can be formed using photolithography. For example, if the first sub-pixel SP1 includes three sub-pixels SP11 to SP13 of different colors, the first light-emitting material layer E21, the first common electrode E31, and the first encapsulation layer EN11 for the three sub-pixels SP11 to SP13 of different colors are formed sequentially through three photolithography processes. Then, a second light-emitting material layer E22, a second common electrode E32, and a second encapsulation layer EN12 for the second sub-pixel SP2 are formed using photolithography. For example, if the second sub-pixel SP2 includes three sub-pixels SP21 to SP23 of different colors, the second light-emitting material layer E22, the second common electrode E32, and the second encapsulation layer EN12 for the three sub-pixels SP21 to SP23 of different colors are formed sequentially through three photolithography processes. Thus, the light-emitting material layer, the common electrode, and the encapsulation layer for the first sub-pixel SP1 and the second sub-pixel SP2 are formed through six photolithography processes.

[0074] For example, such as Figure 2 As shown, the display substrate also includes a second encapsulation layer EN2 and a third encapsulation layer EN3. The first encapsulation layer EN1 (or the first encapsulation sub-layer EN11 and the second encapsulation sub-layer EN12) forms a composite encapsulation layer EN with the second encapsulation layer EN2 and the third encapsulation layer EN3. For example, the first encapsulation layer EN1 (or the first encapsulation sub-layer EN11 and the second encapsulation sub-layer EN12) and the third encapsulation layer EN3 are inorganic encapsulation layers, which can be made of inorganic materials such as silicon oxide, silicon nitride, or silicon oxynitride, and can be formed by methods such as vapor deposition or deposition. The second encapsulation layer EN2 is an organic encapsulation layer, which is made of organic materials such as resin, and can be formed, for example, by inkjet printing.

[0075] For example, such as Figure 2 As shown, the display substrate also includes a first light-shielding layer S1, which is disposed between the substrate 10 and the driving circuit layer 40. The first light-shielding layer S1 can shield the circuit structure of the driving circuit layer 40. The first light-shielding layer S1 includes a first light-transmitting opening S0, which is configured to allow light emitted from the light-emitting device of the second sub-pixel SP2 to pass through. For example, the orthographic projection of the second sub-pixel opening 32 on the substrate 10 is located inside the orthographic projection of the first light-transmitting opening S0 on the substrate 10, so that the light emitted from the light-emitting device of the second sub-pixel SP2 can fully pass through the first light-transmitting opening S0 and exit.

[0076] For example, such as Figure 2As shown, the display substrate also includes a black matrix layer BM, which is disposed on the side of the first common electrode E31 and the second common electrode E32 away from the substrate 10, for example, on the side of the composite encapsulation layer EN away from the substrate 10. The black matrix layer BM includes a black matrix opening BM0, which is configured to allow light emitted by the light-emitting device of the first sub-pixel SP1 to pass through. For example, the orthographic projection of the first sub-pixel opening 31 on the substrate 10 is located inside the orthographic projection of the black matrix opening BM0 on the substrate 10, so that the light emitted by the light-emitting device of the first sub-pixel SP1 can be fully emitted through the black matrix opening BM0.

[0077] For example, such as Figure 2 As shown, the distance between the surface of the black matrix layer BM near the substrate 10 and the surface of the first electrode E11 away from the substrate 10 is H1, the area of ​​the black matrix opening BM0 is S10, the distance between the surface of the first light-shielding layer S1 away from the substrate 10 and the surface of the second common electrode E32 near the substrate 10 is H2, and the area of ​​the first light-transmitting opening is S2. Then H1 / S10=H2 / S2.

[0078] Therefore, the angle range of the light emitted by the first sub-pixel SP1 along direction R1 is basically the same as the angle range of the light emitted by the second sub-pixel SP2 along direction R2, so that the light emission angle of the double-sided display reaches the same level, improving the consistency of the double-sided display.

[0079] For example, such as Figure 2 As shown, the distance L1 between the edge of the orthographic projection of the second sub-pixel opening 32 on the substrate 10 and the edge of the orthographic projection of the first light-transmitting opening S0 on the substrate 10 is 3μm to 7μm, for example, 3μm, 4μm, 5μm, 6μm, or 7μm. Therefore, the first light-transmitting opening S0 is extended outward by 3μm to 7μm relative to the second sub-pixel opening 32 to achieve the required light emission angle while ensuring sufficient light transmission.

[0080] For example, such as Figure 2 As shown, the distance L2 between the edge of the orthographic projection of the first sub-pixel opening 31 on the substrate 10 and the edge of the orthographic projection of the black matrix opening BM0 on the substrate 10 is 3μm to 7μm, for example, 3μm, 4μm, 5μm, 6μm, or 7μm. Therefore, the black matrix opening BM0 is extended outward by 3μm to 7μm relative to the first sub-pixel opening 31 to achieve the required light emission angle while ensuring sufficient light transmission.

[0081] For example, in some embodiments, the display substrate further includes an isolation pillar structure disposed on the side of the pixel defining layer 30 away from the substrate 10.

[0082] For example, Figure 8This is a partial cross-sectional schematic diagram of a double-sided display substrate provided in at least one embodiment of the present disclosure. For clarity, Figure 8 Some structures have been omitted. For example... Figure 8 As shown, an isolation pillar P0 is provided between different sub-pixels. The isolation pillar P0 includes a first isolation layer P01 and a second isolation layer P02 disposed on the side of the first isolation layer P01 away from the substrate 10. In a direction parallel to the substrate 10, the first isolation layer P01 is recessed relative to the second isolation layer P02 to form an undercut structure.

[0083] For example, such as Figure 8 As shown, the isolation pillar P0 also includes a third isolation layer P03, which is located on the side of the first isolation layer P01 closest to the substrate 10. The first isolation layer P01 is recessed relative to the third isolation layer P03. For example, the orthographic projection of the second isolation layer P02 on the substrate 10 is located inside the orthographic projection of the third isolation layer P03 on the substrate 10, thus the isolation pillar P0 as a whole forms an undercut structure with an "I"-shaped cross-section. The undercut structure can be used to disconnect the light-emitting material layer and the common electrode. That is, during the fabrication of the display substrate, such as when the light-emitting material layer and the common electrode are formed on the display substrate using photolithography, the presence of the undercut structure allows the light-emitting material layer and the common electrode to be disconnected on the recessed sidewall of the undercut structure, preventing crosstalk between different sub-pixels. In addition, the larger planar dimensions of the third isolation layer P03 can improve the stability of the isolation pillar P0 structure.

[0084] For example, in other embodiments, the isolation column structure may also employ different structural designs.

[0085] For example, Figure 9 This is a partial cross-sectional schematic diagram of another double-sided display substrate provided in at least one embodiment of the present disclosure, as shown below. Figure 9 As shown, isolation pillars P00 are provided between different sub-pixels, and the cross-section of the isolation pillars P00 in the direction perpendicular to the substrate 10 is trapezoidal. For example, in the fabrication process of the display substrate, when the first light-emitting material layer E21 and the second light-emitting material layer E22 are formed by evaporation using a fine metal mask (FMM), the undercut structure may not be provided; in addition, when the first light-emitting material layer E21 and the second light-emitting material layer E22 are formed by evaporation using a fine metal mask (FMM) (see reference...) Figure 6 The trapezoidal isolation pillar P00 helps to form a continuous light-emitting material layer without breaking the light-emitting material layer; similarly, when the first encapsulation layer EN1 is subsequently formed, the first encapsulation layer EN1 can be continuously set.

[0086] For example, in some embodiments, the isolation pillar structure adopts a trapezoidal design between adjacent first sub-pixels SP1 and second sub-pixels SP2 of the same color, so that a continuous light-emitting material layer can be formed in the first sub-pixel SP1 and the second sub-pixel SP2; the isolation pillar structure adopts an undercut structure design between different color sub-pixels of the first sub-pixel SP1 (or the second sub-pixel SP2) to disconnect the light-emitting material layers of different colors to avoid light emission crosstalk.

[0087] For example, Figure 10 This is a partial cross-sectional schematic diagram of another double-sided display substrate provided in at least one embodiment of the present disclosure, as shown below. Figure 10 As shown, the first sub-pixel SP1 includes a first-color sub-pixel SP11 and a second-color sub-pixel SP12 with different emission colors (the specific structure of the second-color sub-pixel SP12 is not shown, but can be referenced to the structure of the first-color sub-pixel SP11). The display substrate also includes a first isolation pillar P1 disposed on the side of the pixel defining layer 30 away from the substrate 10 and located between the first-color sub-pixel SP11 and the second-color sub-pixel SP12, as shown. Figure 10 As shown, the first isolation pillar P1 includes a first isolation layer P11 and a second isolation layer P12 disposed on the side of the first isolation layer P11 away from the substrate 10. In a direction parallel to the substrate 10, the first isolation layer P11 is recessed relative to the second isolation layer P12 to form an undercut structure.

[0088] For example, such as Figure 10 As shown, the first isolation pillar P1 also includes a third isolation layer P13, which is located on the side of the first isolation layer P11 closer to the substrate 10. The first isolation layer P11 is recessed relative to the third isolation layer P13. For example, the orthographic projection of the second isolation layer P12 onto the substrate 10 is located inside the orthographic projection of the third isolation layer P13 onto the substrate 10, thus the first isolation pillar P1 as a whole forms an undercut structure with an "I"-shaped cross-section. The undercut structure can be used to disconnect the light-emitting material layer and the common electrode. That is, during the fabrication of the display substrate, such as when the light-emitting material layer and the common electrode are formed on the display substrate using photolithography, the presence of the undercut structure allows the light-emitting material layer and the common electrode to be disconnected on the recessed sidewall of the undercut structure, preventing crosstalk between different sub-pixels. In addition, the larger planar dimensions of the third isolation layer P13 can improve the stability of the first isolation pillar P1 structure.

[0089] like Figure 10As shown, similarly, the second sub-pixel SP2 includes a first color sub-pixel SP21 and a second color sub-pixel SP22 with different emission colors. The display substrate also includes a first isolation pillar P1 disposed on the side of the pixel defining layer 30 away from the substrate 10 and located between the first color sub-pixel SP11 and the second color sub-pixel SP12. The first isolation pillar P1 has an undercut structure.

[0090] For example, in some embodiments, the isolation pillar structure can be made of a metallic material. In this case, the etching rate of the material used for the first isolation layer PO1 / P11 is greater than that of the materials used for the second isolation layer PO2 / P12 and the third isolation layer PO3 / P13, so as to facilitate the formation of an undercut structure. For example, the first isolation layer PO1 / P11 can be made of a metal with a high etching rate, such as aluminum, while the second isolation layer PO2 / P12 and the third isolation layer PO3 / P13 can be made of metals such as molybdenum and titanium. Thus, the isolation pillar structure can also achieve a conductive function to electrically connect the common electrodes of multiple sub-pixels, thereby reducing the voltage drop of the common electrodes and improving the signal accuracy of the common electrodes.

[0091] For example, in other embodiments, the isolation column structure may also be made of insulating materials, such as organic or inorganic insulating materials.

[0092] For example, such as Figure 10 As shown, the display substrate also includes a second isolation pillar P2 disposed on the side of the pixel defining layer 30 away from the substrate 10 and located between the first sub-pixel SP1 and the second sub-pixel SP2. The second isolation pillar P2 has a trapezoidal cross section perpendicular to the substrate 10, so that a continuous light-emitting material layer and an encapsulation layer can be formed in the first sub-pixel SP1 and the second sub-pixel SP2, reducing the difficulty of manufacturing the display substrate.

[0093] For example, in some embodiments, such as Figure 2 As shown, the display substrate also includes a first color filter layer CF1, which is disposed between the first light-shielding layer S1 and the first electrode layer 20. For example, the first color filter layer CF1 is disposed on the insulating layer IDL below the planarization layer 50, so that the planarization layer 50 can simultaneously planarize the driving circuit layer 40 and the first color filter layer CF1; or, refer to Figure 24 The first color filter layer CF1 is disposed between the planarization layer 50 and the planarization layer 60, so that the planarization layer 60 planarizes the first color filter layer CF1.

[0094] For example, the first color filter layer CF1 includes a first color filter pattern CF11, the orthographic projection of the second sub-pixel opening 32 on the substrate 10 is located within the orthographic projection of the first light-transmitting opening S0 on the substrate 10, the orthographic projection of the first light-transmitting opening S0 on the substrate 10 is located within the orthographic projection of the first color filter pattern CF11 on the substrate 10, and the first color filter pattern CF11 is configured to transmit monochromatic light, such as red light, green light, or blue light.

[0095] Therefore, the planar size of the first color film pattern CF11 is greater than or equal to the planar size of the first light-transmitting opening S0 and the planar size of the second sub-pixel opening 32, so that the light emitted by the second sub-pixel SP2 is fully emitted while the purity of the emitted color of the second sub-pixel SP2 is improved.

[0096] For example, the first light-shielding layer S1 and the first color filter layer CF1 form a COE (Color filler on Encapsulation) structure for the bottom emitting sub-pixel, which improves the aperture ratio and light emission efficiency of the bottom emitting sub-pixel, reduces power consumption, and improves the display effect.

[0097] For example, such as Figure 2 As shown, the display substrate also includes a second color filter layer CF2, which is disposed on the side of the black matrix layer BM away from the substrate 10. The second color filter layer CF2 includes a color filter pattern CF21. The orthographic projection of the first sub-pixel opening 31 on the substrate 10 is located within the orthographic projection of the black matrix opening BM0 on the substrate 10. The orthographic projection of the black matrix opening BM0 on the substrate 10 is located within the orthographic projection of the color filter pattern CF21 on the substrate 10. The color filter pattern CF21 is configured to transmit monochromatic light, such as red light, green light, or blue light.

[0098] Therefore, the planar size of the color filter pattern CF21 is greater than or equal to the planar size of the black matrix opening BM0 and the planar size of the first sub-pixel opening 31, so that the light emitted by the first sub-pixel SP1 can be fully emitted while improving the purity of the light emitted by the first sub-pixel SP1.

[0099] For example, the black matrix layer BM and the second color filter layer CF2 form the COE structure of the top-emitting sub-pixel, which improves the aperture ratio and light emission efficiency of the top-emitting sub-pixel, reduces power consumption, and improves the display effect.

[0100] For example, in some embodiments, such as Figure 2As shown, the driving circuit layer 40 is disposed between the substrate 10 and the first electrode layer 20, and the first light-shielding layer S1 is disposed between the substrate 10 and the driving circuit layer 40. The first light-shielding layer S1 forms the first light-transmitting opening S1 and also includes the first touch electrode T1. In this case, the first light-shielding layer S1 can be made of metal or alloy materials, such as copper, aluminum, titanium, nickel, molybdenum, etc., to simultaneously form a touch structure and achieve a light-shielding function.

[0101] For example, such as Figure 2 As shown, the driving circuit layer 40 includes a transistor TFT and a second touch electrode T2. The second touch electrode T2 is disposed on the same layer as the gate G1 or source / drain electrodes TS1 / D1 / D2 of the transistor TFT. For example, a buffer layer 103 is disposed between the first touch electrode T1 and the second touch electrode T2, and the first touch electrode T1 and the second touch electrode T2 are electrically connected through vias in the buffer layer 103 to form a touch network. Thus, the first light-shielding layer S1 and the driving circuit layer 40 together form a touch structure located on the bottom side of the display substrate.

[0102] It should be noted that, in the embodiments of this disclosure, "same-layer configuration" means that two functional layers or structural layers are formed on the same layer and with the same material in the hierarchical structure of the display substrate. That is, in the fabrication process, the two functional layers or structural layers can be formed from the same material layer, and the required patterns and structures can be formed through the same patterning process. This simplifies the fabrication process of the display substrate.

[0103] For example, in some embodiments, such as Figure 2 As shown, the display substrate also includes a touch structure disposed between the black matrix layer BM and the encapsulation layer EN. This touch structure includes a third touch electrode T3 and a fourth touch electrode T4 disposed on the side of the third touch electrode T3 away from the substrate 10. For example, an insulating layer T31 is disposed between the third touch electrode T3 and the fourth touch electrode T4. The third touch electrode T3 and the fourth touch electrode T4 can be electrically connected through vias in the insulating layer T31 to form a touch network. This touch network forms a touch structure located on the top side of the display substrate. For example, an insulating layer T41 is disposed on the side of the fourth touch electrode T4 away from the substrate 10 to insulate and protect the touch structure. Therefore, the double-sided display substrate can achieve double-sided touch functionality.

[0104] For example, in some embodiments, the display substrate does not have a first color filter layer CF1, but instead the planarization layer 50 is made into a color planarization layer to replace the first color filter layer CF1.

[0105] For example, such as Figure 11As shown, the planarization layer 50 includes a first planarization layer 51, which is disposed between the driving circuit layer 40 and the first electrode layer 20 and configured to transmit only light of a first color, such as red light, green light or blue light, so as to realize the function of the color filter.

[0106] For example, Figure 12 A partial plan view of a double-sided display panel provided in at least one embodiment of the present disclosure is shown, such as... Figure 12 As shown, the second sub-pixel SP2 includes a first-color sub-pixel SP21 and a second-color sub-pixel SP22 that emit different colors. The first-color sub-pixel SP21 is configured to emit light of the first color, and the second-color sub-pixel SP22 is configured to emit light of the second color. The first planarization layer 51 includes a first color filter opening 511. The orthographic projection of the sub-pixel opening 32 of the second-color sub-pixel SP22 onto the substrate 10 lies within the orthographic projection of the first color filter opening 511 onto the substrate 10. A second color filter pattern CF12 that only transmits light of the second color is disposed in the first color filter opening 511. Thus, the first planarization layer 51 can be implemented as the color filter of the first-color sub-pixel SP21, and the second color filter pattern CF12 can be implemented as the color filter of the second-color sub-pixel SP22.

[0107] Or, such as Figure 12 As shown, the display substrate further includes a second planarization layer 52, which is disposed on one side of the first planarization layer 51, for example, on the side close to the substrate 10 or on the side away from the substrate 10. The second planarization layer 52 is located in the first color filter opening 511, and includes a second color filter opening 512. The orthographic projection of the sub-pixel opening 32 of the first color sub-pixel SP21 on the substrate 10 is located within the orthographic projection of the second color filter opening 512 on the substrate 10. Thus, the first planarization layer 51 can be implemented as the color filter of the first color sub-pixel SP21, and the second planarization layer 52 can be implemented as the color filter of the second color sub-pixel SP22.

[0108] For example, such as Figure 11As shown, the second sub-pixel SP2 further includes a third color sub-pixel SP23. The emission color of the third color sub-pixel SP23 is different from the emission color of the first color sub-pixel SP21 and the second color sub-pixel SP22. The first planarization layer 51 also includes a third color filter opening 513. The orthographic projection of the sub-pixel opening 32 of the third color sub-pixel SP23 onto the substrate 10 is located within the orthographic projection of the third color filter opening 513 onto the substrate 10. A third color filter pattern CF13 that transmits only the third color light is disposed in the third color filter opening 513. Thus, the first planarization layer 51 can be implemented as the color filter of the first color sub-pixel SP21, the second color filter pattern CF12 can be implemented as the color filter of the second color sub-pixel SP22, and the third color filter pattern CF13 can be implemented as the color filter of the third color sub-pixel SP23.

[0109] Or, such as Figure 12 As shown, when the display substrate includes a first planarization layer 51 and a second planarization layer 52, the second planarization layer 52 includes a color filter opening 513A that exposes a third color filter opening 513. A third color filter pattern CF13, which transmits only light of the third color, is provided in the third color filter opening 513 and the color filter opening 513A. Therefore, the first planarization layer 51 can be implemented as the color filter for the first color sub-pixel SP21, the second planarization layer 52 can be implemented as the color filter for the second color sub-pixel SP22, and the third color filter pattern CF13 can be implemented as the color filter for the third color sub-pixel SP23.

[0110] Or, such as Figure 13 As shown, the display substrate includes a first planarization layer 51, a second planarization layer 52, and a third planarization layer 53. The third planarization layer 53 is disposed on one side of the first planarization layer 51, for example, on the side close to the substrate 10 or on the side away from the substrate 10. The third planarization layer 53 is located in the third color filter opening 513. The third planarization layer 53 includes a fourth color filter opening 511A and a fifth color filter opening 512A. The orthographic projection of the sub-pixel opening 32 of the second color sub-pixel SP22 on the substrate 10 is located within the orthographic projection of the fourth color filter opening 511A on the substrate 10. The orthographic projection of the sub-pixel opening 32 of the first color sub-pixel SP21 on the substrate 10 is located within the orthographic projection of the fifth color filter opening 512A on the substrate 10. Therefore, the first planarization layer 51 can be implemented as the color filter of the first color sub-pixel SP21, the second planarization layer 52 can be implemented as the color filter of the second color sub-pixel SP22, and the third planarization layer 53 can be implemented as the color filter of the third color sub-pixel SP23.

[0111] Therefore, in Figure 11 and Figure 12In this embodiment, a first planarization layer 51 is used to achieve planarization and the color filter pattern of the first color sub-pixel SP21, a second color filter pattern CF12 is used to form the color filter pattern of the second color sub-pixel SP22, and a third color filter pattern CF13 is used to form the color filter pattern of the third color sub-pixel SP23. Figure 13 In this embodiment, a first planarization layer 51 is used to achieve planarization and the color filter pattern of the first color sub-pixel SP21, a second planarization layer 52 is used to achieve planarization and the color filter pattern of the second color sub-pixel SP22, and a third color filter pattern CF13 is used to form the color filter pattern of the third color sub-pixel SP23. Figure 14 In the embodiments, a first planarization layer 51 is used to achieve the planarization function and the color filter pattern of the first color sub-pixel SP21, a second planarization layer 52 is used to achieve the planarization function and the color filter pattern of the second color sub-pixel SP22, and a third planarization layer 53 is used to achieve the planarization function and the color filter pattern of the third color sub-pixel SP23.

[0112] The embodiments disclosed herein do not limit the stacking order of the first planarization layer 51, the second planarization layer 52, and the third planarization layer 53; the main purpose is to achieve the corresponding color filter function.

[0113] For example, the first color sub-pixel SP21, the second color sub-pixel SP22, and the third color sub-pixel SP23 are one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel, respectively. Correspondingly, the first planarization layer 51, the second planarization layer 52, and the third planarization layer 53 are one of the red planarization layer, the green planarization layer, and the blue planarization layer.

[0114] For example, the first color sub-pixel SP21 is a blue sub-pixel, the second color sub-pixel SP22 is a red sub-pixel, and the third color sub-pixel SP23 is a green-blue sub-pixel; or, the first color sub-pixel SP21 is a blue sub-pixel, the second color sub-pixel SP22 is a green sub-pixel, and the third color sub-pixel SP23 is a red-blue sub-pixel; or, the first color sub-pixel SP21 is a red sub-pixel, the second color sub-pixel SP22 is a green sub-pixel, and the third color sub-pixel SP23 is a green-blue sub-pixel; or, the first color sub-pixel SP21 is a green sub-pixel, the second color sub-pixel SP22 is a red sub-pixel, and the third color sub-pixel SP23 is a blue sub-pixel, and so on. The colors of the first planarization layer 51, the second planarization layer 52, and the third planarization layer 53 are set accordingly, which will not be elaborated here.

[0115] For example, in some embodiments, reference Figure 1The first sub-pixel SP1 includes a first red sub-pixel (e.g., implemented as a second color sub-pixel SP12), a first green sub-pixel (e.g., implemented as a third color sub-pixel SP13), and a first blue sub-pixel (e.g., implemented as a first color sub-pixel SP11). The second sub-pixel SP2 includes a second red sub-pixel (e.g., implemented as a second color sub-pixel SP22), a second green sub-pixel (e.g., implemented as a third color sub-pixel SP23), and a second blue sub-pixel (e.g., implemented as a first color sub-pixel SP11). The first sub-pixel SP1 is arranged in row N, and the second sub-pixel SP2 is arranged in row N+1, where N is a positive integer greater than or equal to 1. Figure 1 In the arrangement, N is an odd number; the first red sub-pixel (e.g., SP12) and the second red sub-pixel (e.g., SP22) are arranged in the same column, the first green sub-pixel (e.g., SP13) and the second green sub-pixel (e.g., SP23) are arranged in the same column, and the first blue sub-pixel (e.g., SP11) and the second blue sub-pixel (e.g., SP21) are arranged in the same column.

[0116] Therefore, in the column direction, the top-emitting sub-pixels and bottom-emitting sub-pixels overlap and are arranged in the same column, and the top-emitting sub-pixels and bottom-emitting sub-pixels of the same color are arranged in the same column, which facilitates the formation of each sub-pixel during the fabrication process and facilitates the arrangement of the "one-to-two" driving circuit structure.

[0117] For example, in an embodiment where a planarization layer is used to form the color filter, reference is made to... Figure 1 A pixel unit is composed of a first red sub-pixel, a first green sub-pixel, a first blue sub-pixel, a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel. Multiple pixel units are arranged in an array. In the same pixel unit, the spacing d1 between the sub-pixel openings of sub-pixels of the same color is 4μm-17μm, such as 4μm, 5μm, 7μm, 9μm, 10μm, 12μm, 15μm, or 17μm. Between different pixel units, the spacing d2 between the sub-pixel openings of sub-pixels of the same color is 15μm-50μm, such as 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, or 50μm.

[0118] For example, in other embodiments, the subpixels may also be arranged in different ways, for example... Figure 15 This is a schematic diagram of the arrangement of another double-sided display substrate provided in at least one embodiment of the present disclosure, as shown below. Figure 15As shown, the first sub-pixel SP1 includes a first red sub-pixel (e.g., implemented as a second color sub-pixel SP12), a first green sub-pixel (e.g., implemented as a third color sub-pixel SP13), and a first blue sub-pixel (e.g., implemented as a first color sub-pixel SP11). The second sub-pixel SP2 includes a second red sub-pixel (e.g., implemented as a second color sub-pixel SP22), a second green sub-pixel (e.g., implemented as a third color sub-pixel SP23), and a second blue sub-pixel (e.g., implemented as a first color sub-pixel SP21). The second red sub-pixel (e.g., SP22) and the second green sub-pixel (e.g., SP23) are alternately arranged in column M, and the second blue sub-pixel (e.g., SP21) is arranged in column M+1, where M is a positive integer greater than or equal to 1. Figure 15 In the example, M is 2 or 6; the first blue sub-pixel (e.g., SP11) is set in column M+2, and the first red sub-pixel (e.g., SP12) and the first green sub-pixel (e.g., SP13) included in the first sub-pixel SP1 are alternately set in column M+3.

[0119] For example, such as Figure 15 As shown, the first green sub-pixel (e.g., SP13) and the second green sub-pixel (e.g., SP23) are set in row X, where X is a positive integer greater than or equal to 1. Figure 15 In the example, X is an odd number; the first red sub-pixel (e.g., SP12) and the second red sub-pixel (e.g., SP22) are set in the X+1 row, and the first blue sub-pixel (e.g., SP11) consists of a first part 1 and a second part 2 set consecutively, the first part 1 being located in the X row, that is, in the same row as the first green sub-pixel (e.g., SP13) and the second green sub-pixel (e.g., SP23), and the second part 2 being located in the X+1 row, that is, in the same row as the first red sub-pixel (e.g., SP12) and the second red sub-pixel (e.g., SP22); similarly, the second blue sub-pixel (e.g., SP21) consists of a third part 3 and a fourth part 4 set consecutively, the third part 3 being located in the X row, and the fourth part 4 being located in the X+1 row.

[0120] For example, in this embodiment, a first red sub-pixel, a first green sub-pixel, a first blue sub-pixel, a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel constitute a pixel unit, and multiple pixel units are arranged in an array.

[0121] For example, in other embodiments, such as Figure 16As shown, the planarization layer 50 can be a black planarization layer, for example, made of a black organic material. The black planarization layer is disposed between the driving circuit layer 40 and the first electrode layer 20. The black planarization layer includes a first light-emitting opening 50A, in which a first color filter pattern CF11 is disposed. Therefore, the black planarization layer including the first light-emitting opening 50A can participate in controlling the light-emitting angle of the sub-pixel, preventing the sub-pixel from emitting light from a large viewing angle and limiting the light-emitting angle of the sub-pixel to a suitable range.

[0122] For example, such as Figure 16 As shown, the first light-shielding layer S1 is disposed between the substrate 10 and the driving circuit layer 40, and includes a first light-transmitting opening S0. The orthographic projection of the first light-transmitting opening S0 on the substrate 10 is located within the orthographic projection of the first light-emitting opening 50A on the substrate 10. For example, the orthographic projection of the first light-emitting opening 50A on the substrate 10 is located within the orthographic projection of the first color filter pattern CF11 on the substrate 10.

[0123] For example, the first light-transmitting opening S0 is extended by 3μm to 7μm relative to the second sub-pixel opening 32 to obtain the required light emission angle while ensuring sufficient light transmission; the black matrix opening BM0 is extended by 3μm to 7μm relative to the first sub-pixel opening 31 to obtain the required light emission angle while ensuring sufficient light transmission.

[0124] For example, in Figure 16 In this embodiment, the black planarization layer can participate in controlling the light emission angle of the sub-pixels. At this time, the light-shielding requirement of the display substrate for the first light-shielding layer S1 is reduced, and the design of the first light-shielding layer S1 can be more flexible. For example, the area of ​​the first light-transmitting opening S0 can be set to be larger.

[0125] For example, such as Figure 16 As shown, the distance between the surface of the black matrix layer BM near the substrate 10 and the surface of the first electrode E11 away from the substrate 10 is H1; the area of ​​the black matrix opening BM0 is S10; the distance between the surface of the first color filter pattern CF11 near the substrate 10 and the surface of the second common electrode E32 near the substrate 10 is H3; the area of ​​the first light-emitting opening 50A is S3; the distance between the surface of the first light-shielding layer S1 away from the substrate 10 and the surface of the second common electrode E32 near the substrate 10 is H2; and the area of ​​the first light-transmitting opening S0 is S2.

[0126] H1 / S10 = H3 / S3 ≥ H2 / S2.

[0127] Therefore, the angle range of the light emitted by the first sub-pixel SP1 along direction R1 is basically the same as the angle range of the light emitted by the second sub-pixel SP2 along direction R2, so that the light emission angle of the double-sided display reaches the same level, improving the consistency of the double-sided display.

[0128] For example, to further improve the light extraction efficiency of the second sub-pixel SP2, such as Figure 17 As shown, in the direction perpendicular to the substrate 10, the substrate 10 includes a first substrate portion 101 overlapping with the second sub-pixel opening 32 and a second substrate portion 102 other than the first substrate portion 101. The first substrate portion 101 is hollowed out, for example, by removing the material of the first substrate portion 101 during the fabrication process through photolithography or laser process.

[0129] For example, such as Figure 17 As shown, the display substrate also includes a buffer layer (Barrier) 103, which is disposed on the side of the first light-shielding layer S1 away from the substrate 10. After the first substrate portion 101 is cut out, the buffer layer 103 is exposed. For example, the buffer layer 103 can be made of inorganic materials such as silicon oxide, silicon nitride, or silicon oxynitride; or, the buffer layer 103 can be made of organic materials such as resin.

[0130] Alternatively, in other embodiments, such as Figure 18 As shown, the thickness t2 of the first substrate portion 101 is less than the thickness t1 of the second substrate portion 102. During the fabrication process, the first substrate portion 101 is thinned without being hollowed out by photolithography or laser processes, thereby protecting the buffer layer 103.

[0131] For example, in some embodiments, in order to achieve independent driving of each sub-pixel, such as Figure 18 As shown, the first sub-pixel SP1 and the second sub-pixel SP2 can be driven by different driving circuits.

[0132] For example, such as Figure 19 As shown, the driving circuit layer 40 includes a first driving circuit 41 and a first driving circuit 42. The first driving circuit 41 includes a first output terminal 41A, and the first driving circuit 42 includes an output terminal 42A. A planarization layer 50 is disposed between the driving circuit layer 40 and the first electrode layer 20. The planarization layer 50 includes a first via V1 exposing the first output terminal 41A and a via V0 exposing the output terminal 42A. The first electrode E11 is electrically connected to the first output terminal 41A through the first via V1, and the second electrode E1 is electrically connected to the output terminal 42A through the via V0.

[0133] Therefore, the top-emitting sub-pixels and the bottom-emitting sub-pixels are driven separately, which can improve the driving flexibility of the display substrate, but the aperture ratio and resolution of the display substrate are somewhat reduced compared to the "one-to-two" embodiment.

[0134] For example, in various embodiments of this disclosure, the COE structure of the top-emitting sub-pixel, the COE structure of the bottom-emitting sub-pixel, the top-side touch structure, and the bottom-side touch structure can be selectively configured as needed. For example, in some embodiments, the COE structure of the top-emitting sub-pixel and the top-side touch structure can be configured, but the COE structure of the bottom-emitting sub-pixel and the bottom-side touch structure are not configured; or, the COE structure of the bottom-emitting sub-pixel and the bottom-side touch structure can be configured, but the COE structure of the top-emitting sub-pixel and the top-side touch structure are not configured; or, the COE structure of the top-emitting sub-pixel and the bottom-emitting sub-pixel can be configured, but the top-side touch structure and the bottom-side touch structure are not configured; or, the top-side touch structure and the bottom-side touch structure can be configured, but the COE structure of the top-emitting sub-pixel and the bottom-emitting sub-pixel are not configured; and so on. In some embodiments, the COE structure of the top-emitting sub-pixel, the COE structure of the bottom-emitting sub-pixel, the top-side touch structure, and the bottom-side touch structure can all be omitted.

[0135] For example, such as Figure 20 As shown, the display substrate may not include the bottom-side touch structure, that is, the first touch electrode T1 and the second touch electrode T2 are not formed. In this case, the double-sided display substrate can realize single-sided touch function.

[0136] For example, such as Figure 21 As shown, the display substrate includes a top-side touch structure and a bottom-side touch structure, but does not have a COE structure for top-emitting sub-pixels or a COE structure for bottom-emitting sub-pixels; as Figure 22 As shown, in this display substrate, the COE structure of the top-emitting sub-pixel, the COE structure of the bottom-emitting sub-pixel, the top-side touch structure, and the bottom-side touch structure are not provided; Figure 23 As shown, the display substrate has a COE structure for top-emitting sub-pixels and a top-side touch structure, but no COE structure for bottom-emitting sub-pixels or a bottom-side touch structure. The embodiments of this disclosure do not limit the arrangement or combination of the COE structure for top-emitting sub-pixels, the COE structure for bottom-emitting sub-pixels, the top-side touch structure, and the bottom-side touch structure, and will not be described in detail here.

[0137] For example, in embodiments of this disclosure, the substrate 10 may be a flexible substrate or a rigid substrate. The rigid substrate may include, but is not limited to, one or more of glass and quartz, while the flexible substrate may include, but is not limited to, one or more of polyethylene terephthalate, polyethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fibers.

[0138] For example, the active layer A1 can be made of semiconductor materials such as metal oxides, such as amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), or amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, or polythiophene.

[0139] For example, the gate G1, source / drain electrodes TS1 / D1 / D2, first connection electrode C1 and second connection electrode C2 can be made of metallic materials, such as any one or more of titanium (Ti), copper (Cu), aluminum (Al) and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). They can be single-layer structures or multi-layer composite structures, such as Mo / Cu / Mo.

[0140] For example, the insulating layer IDL can be any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and can be a single layer, multiple layers, or a composite layer. For example, the pixel defining layer 30, planarization layer 50, and planarization layer 60 can be made of organic materials, such as polyimide, resin, etc. In some embodiments, if the pixel defining layer 30 or planarization layer 50 is black or colored, dyes can be added to the organic material to form the corresponding color.

[0141] For example, such as Figure 2 As shown, the display substrate also includes other structures such as a cover layer (CV). The embodiments disclosed herein do not limit the other structures of the display substrate; for details, please refer to the relevant technologies.

[0142] At least one embodiment of this disclosure also provides a double-sided display device, which includes the double-sided display substrate provided in the embodiments of this disclosure. The double-sided display device can be any product or component with display function, such as a tablet computer, television, monitor, or digital photo frame. This double-sided display device has higher light extraction efficiency, lower power consumption, longer lifespan, higher resolution and aperture ratio, and more consistent double-sided display effect.

[0143] The following points also need to be explained:

[0144] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0145] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0146] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0147] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure shall be determined by the scope of the claims.

Claims

1. A double-sided display substrate, having a first sub-pixel and a second sub-pixel, and comprising: Substrate A first electrode layer, disposed on the substrate, includes a first electrode for the first sub-pixel and a second electrode for the second sub-pixel, wherein the second electrode is a light-transmitting electrode. A pixel defining layer, disposed on the side of the first electrode layer away from the substrate, includes a first sub-pixel opening exposing the first electrode and a second sub-pixel opening exposing the second electrode. The first sub-pixel is configured to emit light in a direction away from the substrate, and the second sub-pixel is configured to emit light in a direction toward the substrate. The angle formed between the sidewall of the first sub-pixel opening and the surface of the pixel defining layer near the substrate is called the first angle, and the angle formed between the sidewall of the second sub-pixel opening and the surface of the pixel defining layer near the substrate is called the second angle. The first included angle is an acute angle, and the second included angle is an obtuse angle.

2. The double-sided display substrate according to claim 1, wherein, The first included angle is 25°~55°, and the second included angle is 115°~155°.

3. The double-sided display substrate according to claim 1, wherein, The second sub-pixel opening includes a first opening portion and a second opening portion disposed on the side of the first opening portion away from the substrate. The angle formed between the sidewall of the first opening and the surface of the pixel defining layer near the substrate is the second angle, and the angle formed between the sidewall of the second opening and the surface of the pixel defining layer near the substrate is the third angle. The third included angle is smaller than the second included angle.

4. The double-sided display substrate according to claim 3, wherein, The first included angle is 25°~55°. The second included angle is 115°~155°, and the third included angle is 80°~100°.

5. The double-sided display substrate according to any one of claims 1-4, further comprising: A driving circuit layer, disposed between the substrate and the first electrode layer, includes a first driving circuit, which includes a first output terminal and a second output terminal. A planarization layer, disposed between the driving circuit layer and the first electrode layer, includes a first via exposing the first output terminal and a second via exposing the second output terminal. The first electrode is electrically connected to the first output terminal through the first via, and the second electrode is electrically connected to the second output terminal through the second via.

6. The double-sided display substrate according to any one of claims 1-5, further comprising: A first light-emitting material layer is disposed in the opening of the first sub-pixel. The first common electrode is disposed on the side of the first light-emitting material layer away from the substrate. The first encapsulation sublayer is disposed on the side of the first common electrode away from the substrate. A second light-emitting material layer is disposed in the opening of the second sub-pixel. The second common electrode is disposed on the side of the second light-emitting material layer away from the substrate. The second encapsulation sublayer is disposed on the side of the second common electrode away from the substrate.

7. The double-sided display substrate according to any one of claims 1-5, further comprising: A first light-emitting material layer is disposed in the opening of the first sub-pixel. A second light-emitting material layer is disposed in the opening of the second sub-pixel and is integrally connected with the first light-emitting material layer. The first common electrode is disposed on the side of the first light-emitting material layer away from the substrate. The second common electrode is disposed on the side of the second light-emitting material layer away from the substrate. A first encapsulation layer is continuously disposed on the side of the first common electrode and the second common electrode away from the substrate.

8. The double-sided display substrate according to any one of claims 1-5, further comprising: A first light-shielding layer is disposed between the substrate and the driving circuit layer, including a first light-transmitting opening. A black matrix layer is disposed on the side of the first common electrode and the second common electrode away from the substrate, and includes black matrix openings. Wherein, the distance between the surface of the black matrix layer near the substrate and the surface of the first electrode away from the substrate is H1, and the area of ​​the opening of the black matrix is ​​S10. The distance between the surface of the first light-shielding layer away from the substrate and the surface of the second common electrode near the substrate is H2, and the area of ​​the first light-transmitting opening is S2. H1 / S10 = H2 / S2.

9. The double-sided display substrate according to claim 8, wherein, The distance between the edge of the orthographic projection of the second sub-pixel opening on the substrate and the edge of the orthographic projection of the first light-transmitting opening on the substrate is 3μm~7μm; and / or The distance between the edge of the orthographic projection of the first sub-pixel opening on the substrate and the edge of the orthographic projection of the black matrix opening on the substrate is 3μm~7μm.

10. The double-sided display substrate according to any one of claims 1-9, wherein, The first sub-pixel or the second sub-pixel includes a first color sub-pixel and a second color sub-pixel with different emission colors. The display substrate further includes: A first isolation pillar is disposed on the side of the pixel defining layer away from the substrate and located between the first color sub-pixel and the second color sub-pixel. The first isolation pillar includes a first isolation layer and a second isolation layer disposed on the side of the first isolation layer away from the substrate. In a direction parallel to the substrate, the first isolation layer is recessed relative to the second isolation layer to form an undercut structure.

11. The double-sided display substrate according to any one of claims 1-10, further comprising: The second isolation pillar is disposed on the side of the pixel defining layer away from the substrate and located between the first sub-pixel and the second sub-pixel. The second isolation pillar has a trapezoidal cross-section perpendicular to the substrate.

12. The double-sided display substrate according to any one of claims 1-11, further comprising: A driving circuit layer is disposed between the substrate and the first electrode layer. A first light-shielding layer is disposed between the substrate and the driving circuit layer, including a first light-transmitting opening. A first color filter layer, disposed between the first light-shielding layer and the first electrode layer, includes a first color filter pattern. Wherein, the orthographic projection of the second sub-pixel opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate, and the orthographic projection of the first light-transmitting opening on the substrate is located within the orthographic projection of the first color filter pattern on the substrate.

13. The double-sided display substrate according to any one of claims 1-11, further comprising: A driving circuit layer is disposed between the substrate and the first electrode layer. A first light-shielding layer is disposed between the substrate and the driving circuit layer, and includes a first touch electrode and a first light-transmitting opening, wherein the orthographic projection of the second sub-pixel opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate.

14. The double-sided display substrate according to any one of claims 1-13, wherein, The driving circuit layer includes transistors and a second touch electrode. The transistor includes a gate and source / drain electrodes, and the second touch electrode is disposed on the same layer as the gate or the source / drain electrodes. The first touch electrode is electrically connected to the second touch electrode.

15. The double-sided display substrate according to any one of claims 1-11, further comprising: A driving circuit layer is disposed between the substrate and the first electrode layer. A first planarization layer is disposed between the driving circuit layer and the first electrode layer, and is configured to transmit only light of a first color.

16. The double-sided display substrate according to any one of claims 1-15, wherein, The second sub-pixel includes a first-color sub-pixel and a second-color sub-pixel that emit different colors of light. The first-color sub-pixel is configured to emit light of the first color, and the second-color sub-pixel is configured to emit light of the second color. The first planarization layer includes a first color filter opening, and the orthographic projection of the subpixel opening of the second color subpixel on the substrate lies within the orthographic projection of the first color filter opening on the substrate. A second color filter pattern that transmits only light of the second color is provided in the first color filter opening, or The display substrate further includes: A second planarization layer is disposed on one side of the first planarization layer and located in the first color filter opening, wherein the second planarization layer includes a second color filter opening, and the orthographic projection of the subpixel opening of the first color subpixel on the substrate is located within the orthographic projection of the second color filter opening on the substrate.

17. The double-sided display substrate according to claim 16, wherein, The second sub-pixel also includes a third color sub-pixel, the emission color of which is different from the emission colors of the first color sub-pixel and the second color sub-pixel. The first planarization layer further includes a third color filter opening, wherein the orthographic projection of the subpixel opening of the third color subpixel on the substrate lies within the orthographic projection of the third color filter opening on the substrate. The third color filter opening is provided with a third color filter pattern that transmits only light of the third color, or The display substrate further includes: A third planarization layer is disposed on one side of the first planarization layer and located in the third color filter opening. The third planarization layer includes a fourth color filter opening and a fifth color filter opening. The orthographic projection of the sub-pixel opening of the second color sub-pixel on the substrate is located within the orthographic projection of the fourth color filter opening on the substrate. The orthographic projection of the sub-pixel opening of the first color sub-pixel on the substrate is located within the orthographic projection of the fifth color filter opening on the substrate.

18. The double-sided display substrate according to any one of claims 1-17, wherein, The first sub-pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel; the second sub-pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel. The first sub-pixel is arranged in row N, and the second sub-pixel is arranged in row N+1, where N is a positive integer greater than or equal to 1. The first red sub-pixel and the second red sub-pixel are arranged in the same column, the first green sub-pixel and the second green sub-pixel are arranged in the same column, and the first blue sub-pixel and the second blue sub-pixel are arranged in the same column.

19. The double-sided display substrate according to any one of claims 1-17, wherein, The first sub-pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel; the second sub-pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel. The second red sub-pixel and the second green sub-pixel are alternately placed in column M, and the second blue sub-pixel is placed in column M+1, where M is a positive integer greater than or equal to 1. The first blue sub-pixel is located in column M+2, and the first red sub-pixel and the first green sub-pixel included in the first sub-pixel are alternately located in column M+3.

20. The double-sided display substrate according to claim 19, wherein, The first green sub-pixel and the second green sub-pixel are set in row X, where X is a positive integer greater than or equal to 1. The first red sub-pixel and the second red sub-pixel are set in row X+1. The first blue sub-pixel comprises a first portion and a second portion that are consecutively arranged, the first portion being located in the Xth row and the second portion being located in the (X+1)th row. The second blue sub-pixel includes a third part and a fourth part that are set consecutively, the third part being located in the Xth row and the fourth part being located in the X+1th row.

21. The double-sided display substrate according to any one of claims 1-11, further comprising: A driving circuit layer is disposed between the substrate and the first electrode layer, and A black planarization layer is disposed between the driving circuit layer and the first electrode layer, including a first light-emitting opening, in which a first color filter pattern is disposed.

22. The double-sided display substrate according to claim 21, further comprising: A first light-shielding layer is disposed between the substrate and the driving circuit layer, including a first light-transmitting opening. Wherein, the orthographic projection of the first light-transmitting opening on the substrate is located within the orthographic projection of the first light-emitting opening on the substrate.

23. The double-sided display substrate according to claim 22, further comprising: A black matrix layer, disposed on the side of the pixel defining layer away from the substrate, includes black matrix openings. The distance between the surface of the black matrix layer near the substrate and the surface of the first electrode away from the substrate is H1, and the area of ​​the opening in the black matrix is ​​S10. The distance between the surface of the first color filter pattern near the substrate and the surface of the second common electrode near the substrate is H3, and the area of ​​the first light-emitting opening is S3. The distance between the surface of the first light-shielding layer away from the substrate and the surface of the second common electrode near the substrate is H2, and the area of ​​the first light-transmitting opening is S2. H1 / S10 = H3 / S3 ≥ H2 / S2.

24. The double-sided display substrate according to any one of claims 1-23, wherein, In a direction perpendicular to the substrate, the substrate includes a first substrate portion overlapping the opening of the second sub-pixel and a second substrate portion other than the first substrate portion. The thickness of the first substrate portion is less than the thickness of the second substrate portion, or the first substrate portion is hollowed out.

25. A double-sided display device, comprising the double-sided display substrate as described in any one of claims 1-24.

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