Display substrate and display device

Abstract

The invention provides a display substrate and a display device, belongs to the technical field of display, and can solve the problem that display pictures of a first display area and a second display area of an existing display substrate are greatly different. The display substrate is provided with a first display area and a second display area, and comprises a substrate, and a driving circuit layer, at least one planarization layer and a light-emitting device layer which are sequentially arranged on the substrate, the display substrate further comprises a black pixel limiting layer and a spacer which are located on the side, away from the substrate, of the planarization layer. In the first display area, the orthographic projection of the spacer on the substrate is not overlapped with the orthographic projection of the pixel opening and the overlapping via hole on the substrate; in the second display area, the orthographic projection of the spacer on the substrate is not overlapped with the orthographic projection of the pixel opening and the orthographic projection of the first light-transmitting opening on the substrate, and is at least partially overlapped with the orthographic projection of the lap-joint via hole on the substrate.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display substrate and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) is a light-emitting device that uses organic solid-state semiconductors as light-emitting materials. It has broad application prospects due to its advantages such as simple preparation process, low cost, low power consumption, high luminous brightness, and wide operating temperature adaptability. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and provides a display substrate and a display device.

[0004] In a first aspect, an embodiment of the present disclosure provides a display substrate having a first display area and a second display area, wherein the display substrate comprises: a substrate, a driving circuit layer, at least one planarization layer, and a light-emitting device layer sequentially arranged on the substrate; the light-emitting device layer comprises: a plurality of light-emitting devices; the light-emitting device comprises: a first electrode; the first electrode is electrically connected to the driving circuit layer through a lapped via hole penetrating at least one planarization layer; the display substrate further comprises: a black pixel defining layer located on a side of the planarization layer away from the substrate and a spacer located on a side of the black pixel defining layer away from the substrate;

[0005] In the first display area, the black pixel defining layer has a plurality of pixel openings exposing the first electrode; the orthographic projection of the spacer on the substrate does not overlap with the orthographic projection of the pixel opening and the orthographic projection of the overlapping via on the substrate;

[0006] In the second display area, the black pixel defining layer also has a first light-transmitting opening located between some adjacent pixel openings; the orthographic projection of the spacer on the substrate does not overlap with the orthographic projections of the pixel opening and the first light-transmitting opening on the substrate, and at least partially overlaps with the orthographic projection of the overlapping via on the substrate.

[0007] Optionally, in the first display area, some of the pixel openings are irregular in shape, and their orientations are periodically arranged in the first direction, and at least two pixel openings with different orientations are arranged in each period;

[0008] When the pixel opening faces a direction close to the spacer, the difference between the distance between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate is less than a threshold value;

[0009] When the pixel opening faces a direction away from the spacer, the difference between the distances between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate is greater than a threshold.

[0010] Optionally, when the pixel opening faces a direction close to the spacer, the distances between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate are both 13±0.5 micrometers;

[0011] When the pixel opening is facing away from the spacer, the distance between the edge of the orthographic projection of the spacer on the substrate and the edge of the orthographic projection of one of the two adjacent pixel openings arranged in the first direction on the substrate is 13±0.5 microns, and the distance between the edge of the orthographic projection of the spacer on the substrate is 16±0.5 microns.

[0012] Optionally, a difference between a distance between an edge of an orthographic projection of the spacer on the substrate and edges of orthographic projections of two adjacent pixel openings arranged in a second direction on the substrate is less than a threshold; and the second direction intersects the first direction.

[0013] Optionally, a distance between an edge of an orthographic projection of the spacer on the substrate and edges of orthographic projections of two adjacent pixel openings arranged in the second direction on the substrate is 14±0.5 micrometers.

[0014] Optionally, in the second display area, an orthographic projection of at least part of the spacer on the substrate partially overlaps with an orthographic projection of at least one of two adjacent overlapping vias on the substrate.

[0015] Optionally, at least a portion of the orthographic projections of the spacers on the substrate partially overlap with the orthographic projections of two adjacent overlapping vias on the substrate.

[0016] Optionally, the distances between the edges of the orthographic projections of at least part of the spacers on the substrate and the edges of the orthographic projections of two adjacent overlapping vias on the substrate are equal.

[0017] Optionally, the distance between the edge of the orthographic projection of at least part of the spacers on the substrate and the edge of the orthographic projection of two adjacent overlapping vias on the substrate is 0.2 micrometers to 0.5 micrometers.

[0018] Optionally, the length of the spacer along the first direction is 10±0.5 microns, and the length along the second direction is 13±0.5 microns; the second direction intersects with the first direction.

[0019] Optionally, the arrangement density of the spacers is greater than or equal to 0.8%.

[0020] Optionally, the display substrate further comprises: an encapsulation layer and a black matrix layer which are sequentially arranged on a side of the light-emitting device layer away from the substrate; the black matrix layer has a second light-transmitting opening;

[0021] An orthographic projection of the second light-transmitting opening on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

[0022] Optionally, an orthographic projection area of ​​the second light-transmitting opening on the substrate is larger than an orthographic projection area of ​​the pixel opening on the substrate.

[0023] Optionally, an orthographic projection of the pixel opening on the substrate falls within an orthographic projection of the second light-transmitting opening on the substrate.

[0024] Optionally, a distance between an edge of an orthographic projection of the spacer on the substrate and an edge of an orthographic projection of the black matrix layer on the substrate is greater than or equal to 1.58 micrometers.

[0025] Optionally, the display substrate further comprises: a color filter layer; the color filter layer comprises: a plurality of color filters;

[0026] Each of the color filters covers the second light-transmitting opening respectively.

[0027] Optionally, the color of the color filter is the same as the color of the light-emitting device in the corresponding pixel opening.

[0028] Optionally, the black matrix layer further has a third light-transmitting opening disposed between some of the second light-transmitting openings;

[0029] An orthographic projection of the third light-transmitting opening on the substrate at least partially overlaps with an orthographic projection of the first light-transmitting opening on the substrate.

[0030] Optionally, an orthographic projection area of ​​the third light-transmitting opening on the substrate is larger than an orthographic projection area of ​​the first light-transmitting opening on the substrate.

[0031] Optionally, an orthographic projection of the first light-transmitting opening on the substrate falls within an orthographic projection of the third light-transmitting opening on the substrate.

[0032] Optionally, the driving circuit layer has a plurality of first hollow portions;

[0033] An orthographic projection of the first hollow portion on the substrate at least partially overlaps with an orthographic projection of the overlapping via on the substrate.

[0034] Optionally, the driving circuit layer further has a flat portion between adjacent first hollow portions;

[0035] An orthographic projection of the flat portion on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

[0036] Optionally, the driving circuit layer further has a second hollow portion;

[0037] An orthographic projection of the second hollow portion on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

[0038] In a second aspect, an embodiment of the present disclosure provides a display device, wherein the display device includes a display substrate as provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figures 1a to 1e A schematic diagram of the structure of each film layer of a display substrate provided in an embodiment of the present disclosure.

[0040] Figure 2 for Figure 1e The cross-sectional structure diagram of the display substrate along the AA' direction is shown.

[0041] Figure 3 for Figure 1e The cross-sectional structure diagram of the display substrate along the BB' direction is shown.

[0042] Figure 4a and Figure 4b for Figure 1e A schematic diagram of a local structure in the first display area of ​​a display substrate is shown.

[0043] Figure 5 for Figure 1e A schematic diagram of a local structure in the second display area of ​​the display substrate is shown.

[0044] Figure 6 for Figure 1e A schematic diagram of the structure of the spacers in the display substrate is shown.

[0045] Figures 7a to 7e A schematic diagram of the structure of each film layer of another display substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] In order to prevent the display substrate from reflecting light, conventional OLED display substrates usually attach a layer of polarizer to the display substrate to improve the comfort of the display substrate under ambient light. However, the inventors of the present disclosure found that the transmittance of the polarizer is usually only about 40%, resulting in a low light extraction rate of the display substrate, resulting in high power consumption of the display substrate, and affecting the display effect.

[0049] At present, in order to avoid the polarizer blocking the light, COE (Cover film On Encapsulation) technology is generally used, that is, the color film (CF) layer is used to replace the polarizer to improve the light extraction rate of the display substrate. This technology is conducive to the development of display substrates towards high integration and thinness.

[0050] In COE technology, a black matrix layer is formed on the display substrate. The black matrix layer has a light-transmitting opening at the position of the light-emitting device corresponding to the pixel opening to transmit the light emitted by the light-emitting device. The above-mentioned color film layer is arranged in the light-transmitting opening. At this time, the black matrix layer can absorb light, and then can block part of the metal in the display substrate, thereby reducing the light reflectivity of the display substrate. The color film layer can filter the light to form light of corresponding color, thereby further improving the utilization rate of the light.

[0051] At the same time, the display substrate is usually provided with photosensitive elements, such as image sensors, light sensors, etc., which are used to realize functions such as fingerprint recognition and display brightness adjustment. At this time, the display substrate needs to increase a certain light transmittance. Usually, the black pixel defining layer in the display substrate is opened to form a light-transmitting opening, so that light can pass through the light-transmitting opening of the black pixel defining layer to sense the light and realize functions such as fingerprint recognition and display brightness adjustment.

[0052] However, the spacers in the display substrate are generally formed on the black pixel defining layer. Since the black pixel defining layer has holes at the positions that originally supported the spacers, the spacers cannot be placed at these positions, causing the structure of the display substrate at these positions to easily collapse. This results in differences in the display images in different areas of the display substrate, affecting the display effect and reducing the user experience.

[0053] In order to solve at least one of the above-mentioned technical problems, the embodiments of the present disclosure provide a display substrate and a display device. The display substrate and the display device provided by the embodiments of the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] In a first aspect, an embodiment of the present disclosure provides a display substrate. Figures 1a to 1e A schematic diagram of the structure of each film layer of a display substrate provided in an embodiment of the present disclosure, Figure 2 for Figure 1e The cross-sectional structure diagram of the display substrate along the AA' direction is shown in FIG. Figure 3 for Figure 1e The cross-sectional structure diagram of the display substrate along the BB' direction is shown in FIG. Figures 1a to 3 The display substrate has a first display area AA1 and a second display area AA2, wherein the display substrate comprises: a substrate 101, a driving circuit layer 102, at least one planarization layer 103, and a light-emitting device layer 104, which are sequentially arranged on the substrate 101; the light-emitting device layer 104 comprises: a plurality of light-emitting devices; the light-emitting device comprises: a first electrode 1041; the first electrode 1041 is electrically connected to the driving circuit layer 102 through a lapped via hole V penetrating at least one planarization layer 103; the display substrate further comprises: a black pixel defining layer 105 located on a side of the planarization layer 103 away from the substrate 101 and a spacer 1 located on a side of the black pixel defining layer 105 away from the substrate 101 06; in the first display area AA1, the black pixel defining layer 105 has a plurality of pixel openings 1051 exposing the first electrode 1041; the orthographic projection of the spacer 106 on the substrate 101 has no overlap with the orthographic projection of the pixel openings 1051 and the overlapping via V on the substrate 101; in the second display area AA2, the black pixel defining layer 105 also has a first light-transmitting opening 1052 located between some adjacent pixel openings 1051; the orthographic projection of the spacer 106 on the substrate 101 has no overlap with the orthographic projection of the pixel openings 1051 and the first light-transmitting opening 1052 on the substrate 101, and at least partially overlaps with the orthographic projection of the overlapping via V on the substrate 101.

[0055] The first display area AA1 in the display substrate can be a normal display area, in which a pixel driving circuit, a light-emitting device and other structures are arranged to realize the display function, and the second display area AA2 can be a sensing display area, in which not only the above-mentioned pixel driving circuit, light-emitting device and other structures for display are arranged, but also a photosensitive element, such as an image sensor, a light sensor, etc., is arranged to realize functions such as fingerprint recognition and display brightness adjustment. Among them, the number of the second display area AA2 can be multiple, which can be arranged on one side or both sides of the first display area AA1, or can also be surrounded by the first display area AA1, and the shape can be circular, rectangular or irregular, etc. It can be understood that in the embodiment of the present disclosure, the specific arrangement and shape of the first display area AA1 and the second display area AA2 are not limited, and the arrangement and shape of the two can be set according to actual needs.

[0056] The substrate 101 can be made of a rigid material such as glass, which can improve the bearing capacity of the substrate 101 for other film layers thereon. Of course, the substrate 101 can also be made of a flexible material such as polyimide (PI), which can improve the bending and stretching resistance of the entire display substrate, and avoid the stress generated during bending, stretching, and twisting that causes the substrate 101 to break and cause a short circuit. In practical applications, the material of the substrate 101 can be reasonably selected according to actual needs to ensure that the display substrate has good performance.

[0057] It is understandable that a buffer layer 101a and other structural film layers may be provided on the substrate 101. The buffer layer 101a may be made of at least one material selected from silicon nitride (SiN) and silicon oxide (SiO2). It may form a single-layer structure made of a single material or a multi-layer structure made of a plurality of different materials, wherein the film layer in contact with the active layer of the transistor is a silicon oxide (SiO2) layer, so as to prevent gases such as water and oxygen from invading from one side of the substrate 101 into other film layers thereon and causing damage to the display substrate. For example, the buffer layer 101a may specifically be a stacked structure of silicon nitride (SiN) and silicon oxide (SiO2), wherein the thickness of the silicon nitride (SiN) is to The thickness of silicon oxide (SiO2) is to

[0058] The driving circuit layer 102 includes: a plurality of pixel driving circuits. The pixel driving circuit includes at least one thin film transistor TFT and a storage capacitor Cst. The thin film transistor TFT includes: an active layer 1021, a gate electrode 1022, a source electrode 1023, and a drain electrode 1024, etc., which are arranged on the substrate 101. The storage capacitor Cst includes: a first electrode plate C1 and a second electrode plate C2 which are arranged on the substrate 101, wherein the first electrode plate C1 and the gate electrode 1022 are arranged in the same layer, and the second electrode plate C2 is arranged on the side of the first electrode plate C1 away from the substrate 101.

[0059] It can be understood that in the embodiments of the present disclosure, "same-layer arrangement" means that two or more functional layers (or structural layers) are in the same layer and are formed of the same material in the hierarchical structure of the display substrate, that is, in the preparation process, the two or more functional layers (or structural layers) can be formed by the same material layer, and the required patterns and structures can be formed by the same composition process.

[0060] The display substrate may further include a first gate insulating layer 1025 disposed on the substrate 101 and on the active layer 1021 , a second gate insulating layer 1026 disposed on the gate electrode 1022 and the first electrode plate C1 , and an interlayer insulating layer 1027 disposed on the second electrode plate C2 .

[0061] The pixel driving circuit can be formed into a structure such as 2T1C (two thin film transistors TFT and one storage capacitor Cst), 6T1C (six thin film transistors TFT and one storage capacitor Cst), 7T1C (seven thin film transistors TFT and one storage capacitor Cts). Among them, the thin film transistor has the following structure: Figure 2 The thin film transistor TFT has a similar or identical stacked structure as shown. Figure 2 Only the thin film transistor TFT directly electrically connected to the light emitting device is shown. The thin film transistor TFT may be a driving thin film transistor or a light emitting control thin film transistor, etc.

[0062] At least one planarization layer 103 is also provided on the driving circuit layer 102. For example, the source electrode 1023 of the thin film transistor TFT in the driving circuit layer 102 is electrically connected to the first electrode 1041 of the light emitting device in the light emitting device layer 104 through the via hole V penetrating the planarization layer 103. At this time, the number of layers of the planarization layer 1031 may be one layer. For example, the display substrate further includes a connecting electrode, and the source electrode 1023 of the thin film transistor TFT in the driving circuit layer 102 is electrically connected to the first electrode 1041 of the light emitting device in the light emitting device layer 104 through the connecting electrode. Two or three layers of planarization layer 103 are required to planarize the film layer. At this time, the number of layers of the planarization layer 103 may be multiple layers. The planarization layer 103 may be made of organic materials such as acrylic, resin, polyimide or benzocyclobutene, and may be selected according to actual needs. The planarization layer 103 can perform planarization processing on structures such as the source 1023 and the drain 1024 to form a relatively flat surface, which is convenient for the bonding of other film layers thereon.

[0063] The light-emitting device layer 104 may include: a plurality of light-emitting devices; each light-emitting device includes: a first electrode 1041 and a second electrode 1042 arranged opposite to each other, and a light-emitting layer 1043 located between the first electrode 1041 and the second electrode 1042. The polarities of the first electrode 1041 and the second electrode 1042 are opposite, wherein the first electrode 1041 may be specifically an anode of the light-emitting device, and the anode may be made of at least one of metal materials such as silver (Ag), aluminum (Al), and titanium (Ti). The second electrode 1042 may be specifically a cathode of the light-emitting device, and the cathode may be made of transparent conductive materials such as indium tin oxide (ITO) and indium zinc oxide (IZO) to improve the transparency of the display substrate as a whole. Both the anode and the cathode may be a single-layer structure made of the above-mentioned single material, or a multi-layer structure made of the above-mentioned multiple materials, and may be selected according to actual needs. The first electrode 1041 can be electrically connected to the source electrode 1023 of the thin film transistor TFT in the driving circuit layer 102 to provide a driving voltage for the light emitting device through the driving circuit layer 102, so that the light emitting layer 1043 of the light emitting device can emit light under the electric field drive of the first electrode 1041 and the second electrode 1042 to achieve a colorful display. It is understandable that the light emitting device may also include various other functional layers, for example, at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL) and an electron injection layer (EIL), which can be set with reference to the film layer structure in the related art, and will not be described in detail here.

[0064] The black pixel defining layer 105 can be located on the side of the planarization layer 103 away from the substrate 101, and can be made of organic materials such as acrylic, resin, polyimide or benzocyclobutene, in which carbon black additives are added to make it appear black. In the first display area AA1, the black pixel defining layer 105 has a plurality of pixel openings 1051, and the first electrode 1041 of the light-emitting device is formed on the planarization layer 103 and covered by the black pixel defining layer 105, and the pixel opening 1051 can expose the first electrode 104. Under the limiting effect of the black pixel defining layer 105, functional film layers such as the light-emitting layer 1043 of the light-emitting device can be formed in the pixel opening 1051. Generally, the light-emitting layer 1043 is formed by an inkjet printing process, and the pixel opening 1051 of the black pixel defining layer 105 can provide a carrying space for inkjet printing ink. In addition, in actual application, the black pixel defining layer 105 can block the light emitted by the light-emitting layer 1043 to avoid crosstalk between the light emitted by adjacent light-emitting devices. In the second display area AA2, in addition to the above-mentioned pixel openings 1051, the black pixel defining layer 105 also has a first light-transmitting opening 1052 arranged between some adjacent pixel openings 1051. The first light-transmitting opening 1052 can facilitate the transmission of light, so as to utilize photosensitive elements, such as image sensors, light sensors, etc., to sense the light and realize functions such as fingerprint recognition and display brightness adjustment.

[0065] The spacer 106 may be located on the side of the black pixel defining layer 105 away from the substrate 101, and is used to support other film layers on the black pixel defining layer 105, and the spacer 106 may be formed around the pixel opening 1051 of the black pixel defining layer 105, and it may block the material of the functional film layers such as the light-emitting layer 1043 of the light-emitting device formed in the pixel opening 1051, prevent the material of the functional film layers such as the light-emitting layer 1043 from overflowing, and avoid the material of the functional film layers such as the light-emitting layer 1043 in adjacent pixel openings 1051 from contaminating each other. The spacer 106 may be made of organic materials such as acrylic, resin, polyimide or benzocyclobutene.

[0066] In the first display area AA1, since the first light-transmitting opening 1052 is not provided, the spacer 106 can be provided between adjacent pixel openings 1051 on the black pixel defining layer 105, and does not cover the area where the overlapping via hole V is located, so as to avoid the collapse of the spacer 106 in the area where the overlapping via hole V is located. In the second display area AA2, since the first light-transmitting opening 1052 is provided, the placement position of the spacer 106 is limited, and the spacer 106 can be provided between adjacent pixel openings 1051 on the black pixel defining layer 105, and can cover the area where the overlapping via hole V is located. Since the area of ​​the second display area AA2 is much smaller than that of the first display area AA1, under the same arrangement density, the number of spacers 106 placed in the second display area AA2 is also much smaller than the number of spacers 106 placed in the first display area AA1. Although the spacers 106 in the second display area AA2 may partially collapse, it does not affect the supporting and blocking functions of the spacers 106.

[0067] In the display substrate provided by the embodiment of the present disclosure, in the first display area AA1, the spacer 106 can be arranged between adjacent pixel openings 1051 on the black pixel defining layer 105, and does not cover the area where the overlapping via hole V is located, so as to avoid the spacer 106 from collapsing in the area where the overlapping via hole V is located. In the second display area AA2, the spacer 106 can be arranged between adjacent pixel openings 1051 on the black pixel defining layer 105, and can cover the area where the overlapping via hole V is located, so as to ensure that a certain number of spacers 106 are placed in both the first display area AA1 and the second display area AA2 of the display substrate, so as to avoid a large difference in the display images of the first display area AA1 and the second display area AA2 of the display substrate, thereby improving the display effect of the display substrate and improving the user experience.

[0068] Figure 4a and Figure 4b for Figure 1e A schematic diagram of a local structure in the first display area of ​​the display substrate shown in FIG. Figure 4a and Figure 4b As shown, in the first display area AA1, the shapes of some pixel openings 1051 are irregular, and their orientations are periodically arranged in the first direction, and at least two pixel openings 1051 with different orientations are arranged in each period; when the pixel opening 1051 is oriented in a direction close to the spacer 106, the difference in distance between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edges of the orthographic projections of two adjacent pixel openings 1051 arranged in the first direction on the substrate 101 is less than a threshold value; when the pixel opening 1051 is oriented in a direction away from the spacer 106, the difference in distance between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edges of the orthographic projections of two adjacent pixel openings 1051 arranged in the first direction on the substrate 101 is greater than a threshold value.

[0069] In the embodiment of the present disclosure, the shape of each pixel opening 1051 is circular or similar to a circle as an example, wherein a circle is a regular shape, and a shape similar to a circle is an irregular shape. The pixel opening 1051 can accommodate the light-emitting layer 1043 of light-emitting devices of different colors. The pixel opening 1051 accommodating the red light-emitting layer can be recorded as a red pixel opening, the pixel opening 1051 accommodating the green light-emitting layer can be recorded as a green pixel opening, and the pixel opening accommodating the blue light-emitting layer can be recorded as a blue pixel opening. Among them, the shapes of the green pixel opening and the blue pixel opening are circular, and the shape of the red pixel opening is an irregular shape similar to a circle. Since the green pixel openings and the blue pixel openings of regular shapes are uniform in all directions, there is no difference in orientation.

[0070] The irregular red pixel opening is uneven in the first direction, and the first direction can be a row direction, and there is a certain relative offset in the first direction. For example, a straight line passing through the center of the red pixel opening and perpendicular to the first direction is taken as the center line, and the direction in which the part with a larger area is located can be defined as the orientation of the red pixel opening. Specifically, if the area on the left side of the red pixel opening is larger than the area on the right side on both sides of the center line, the red pixel opening is facing the left. If the spacer 106 is located on the left side of the center line, the red pixel opening is facing the direction close to the spacer 106, and vice versa, the red pixel opening is facing the direction away from the spacer 106. In the first display area AA1, the red pixel openings are periodically arranged in the first direction, and at least two red pixel openings with different orientations are provided in each period.

[0071] like Figure 4a As shown, the red pixel opening faces the direction close to the spacer 106. At this time, the difference between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of the two adjacent pixel openings 1051 on the substrate 101 is less than a threshold value, which may be 0.5 microns. When the difference between the two is less than the threshold value, it means that the distances from the spacer 106 to the two adjacent pixel openings 1051 in the first direction are approximately equal, and the spacer 106 is located exactly in the middle of the two adjacent pixel openings 1051 in the first direction. For example, the distances between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of the two adjacent pixel openings 1051 in the first direction are both 13±0.5 microns, and may be specifically 13.345 microns and 13.415 microns.

[0072] like Figure 4b As described above, the red pixel opening faces the direction away from the spacer 106. At this time, due to the unevenness of the red pixel opening, Figure 4aThere is a certain difference in the distance between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of the two adjacent pixel openings 1051 on the substrate 101. The difference is greater than a threshold value, which may be 0.5 microns. When the difference between the two is greater than the threshold value, it means that the distances from the spacer 106 to the two adjacent pixel openings 1051 in the first direction are not equal, and the spacer 106 is not located in the middle of the two adjacent pixel openings 1051 in the first direction. For example, the distance between the spacer 106 and one of the adjacent pixel openings 1051 in the first direction is 13±0.5 microns, specifically 13.39 microns, and the distance from the spacer 106 to the other is 16±0.5 microns, specifically 16.125 microns.

[0073] like Figure 4a and Figure 4b As shown, the difference between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of two adjacent pixel openings 1051 arranged in the second direction on the substrate 101 is less than the threshold; the second direction intersects the first direction.

[0074] The difference between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of two adjacent pixel openings 1051 arranged in the second direction on the substrate 101 is less than a threshold value, which may be 0.5 micrometers. When the difference between the two is less than the threshold value, it means that the distances from the spacer 106 to the two adjacent pixel openings 1051 in the second direction are approximately equal, and the spacer 106 is located exactly in the middle of the two adjacent pixel openings 1051 in the second direction. For example, the distances between the edge of the orthographic projection of the spacer 106 on the substrate 101 and the edge of the orthographic projection of the two adjacent pixel openings 1051 in the second direction on the substrate 101 are both 14±0.5 micrometers, which may be specifically Figure 4a 14.25 microns and 13.9 microns as shown, or Figure 4b 14.295 microns and 13.93 microns shown.

[0075] It is understandable that the above-mentioned thresholds can also be set to other smaller values, such as 0.3 microns, etc. They can be set according to actual needs and their values ​​are not limited here.

[0076] Figure 5 for Figure 1e The schematic diagram of the local structure in the second display area of ​​the display substrate shown in FIG. Figure 5 As shown, in the second display area AA2 , the orthographic projection of at least part of the spacer 106 on the substrate 101 partially overlaps with the orthographic projection of at least one of two adjacent overlapping vias V on the substrate 101 .

[0077] In the second display area AA2, the area between two adjacent pixel openings 1051 can be divided into one area, and the overlapping vias V of the first electrodes 1041 of each two light-emitting devices can be set in the same area, so that the area occupied by the overlapping vias V can be reduced, so as to facilitate the setting of the isolation column 106 in the first display area AA1, and to facilitate the setting of the first light-transmitting opening 1052 in the second display area AA2. In the second display area AA2, the spacer 106 can be set in the area corresponding to the two overlapping vias V to effectively support other film layers on the black pixel defining layer 105, so as to avoid a large difference in the display screen between the second display area AA2 and the first display area AA1, thereby improving the display effect of the display substrate and improving the user experience. The spacer 106 can cover one of the two overlapping vias V in the same area, and the spacer 106 can collapse at the position of one overlapping via V to buckle the spacer 106 to prevent the spacer 106 from sliding relative to each other under the action of external force.

[0078] In some embodiments, at least a portion of the orthographic projection of the spacer 106 on the substrate 101 partially overlaps with the orthographic projection of two adjacent overlapping vias V on the substrate 101. The spacer 106 can cover two overlapping vias V in the same area at the same time, and the spacer 106 can collapse at the positions of the two overlapping vias V to buckle the spacer 106 to prevent the spacer 106 from sliding relative to each other under the action of external force.

[0079] In some embodiments, Figure 5 As shown, the distance between the edge of the orthographic projection of at least part of the spacer 106 on the substrate 101 and the edge of the orthographic projection of two adjacent overlapping vias V on the substrate is equal.

[0080] The spacer 106 can be located in the middle area of ​​the two overlapping vias V to ensure that the two ends of the spacer 106 collapse to the same extent, thereby improving the support stability of the spacer 106. At the same time, the overlapping vias V collapse, so that the spacer 106 can be fixed between the two overlapping vias V, thereby preventing the spacer from sliding under stress and causing damage to the light-emitting layer 1043 and other structures of the light-emitting device in the pixel opening 1051.

[0081] Specifically, the distance between the edge of the orthographic projection of at least part of the spacers 106 on the substrate 101 and the edge of the orthographic projection of two adjacent overlapping vias V on the substrate 101 is 0.2 micrometers to 0.5 micrometers.

[0082] The width of the overlapped area between the spacer 106 and the two overlapping vias V can be 0.2 microns to 0.5 microns, for example 0.5 microns. That is, the area with a width of 0.5 microns in the spacer 106 can collapse. It should be noted that the width of the overlapped area cannot be too large or too small. If the width of the overlapped area is too large, the area where the spacer 106 collapses is too large, which affects the supporting effect of the spacer 106. If the width of the overlapped area is too small, it does not have a snap-fit ​​function, which affects the stability of the spacer 106.

[0083] Figure 6 for Figure 1e The schematic diagram of the structure of the spacer in the display substrate is shown in FIG. Figure 6 As shown, the spacer 106 may be a columnar structure, and its cross section along the horizontal direction may be a rectangle, and its length along the first direction (i.e., the row direction) may be 10±0.5 microns, and its length along the second direction (i.e., the column direction) may be 13±0.5 microns. Specifically, its length along the first direction may be 10 microns, and its length along the second direction may be 13 microns, so as to ensure that the spacer 106 has a larger bottom surface and ensure its supporting effect.

[0084] In the display substrate, the pixel area is generally 63×63 microns, and a spacer 106 can be set in every two pixel areas (126×126 microns), the bottom area of ​​the spacer 106 can be 10×13 microns, and the arrangement density of the spacer 106 is (10×13) / (126×126)=0.8%. In practical applications, the arrangement density of the spacer 106 is greater than or equal to 0.8%, which can effectively support other film layers on the black pixel defining layer 105, thereby avoiding a large difference in the display screen between the second display area AA2 and the first display area AA1, thereby improving the display effect of the display substrate and improving the user experience.

[0085] In some embodiments, Figure 2 and Figure 3 As shown, the display substrate also includes: an encapsulation layer 107 and a black matrix layer 108 which are arranged in sequence on the side of the light-emitting device layer 104 away from the substrate 101; the black matrix layer 108 has a second light-transmitting opening 1081; the orthographic projection of the second light-transmitting opening 1081 on the substrate 101 at least partially overlaps with the orthographic projection of the pixel opening 1051 on the substrate 101.

[0086] The encapsulation layer 107 may include multiple sub-encapsulation layers to improve its encapsulation effect. For example, the encapsulation layer 107 may be a composite encapsulation layer, including a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer may be formed of inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride, and the organic encapsulation layer may be formed of organic materials such as polyimide (PI) and epoxy resin. The composite encapsulation layer can form multiple protections for the light-emitting device layer in the display substrate, has a better encapsulation effect, and prevents the intrusion of gases such as water and oxygen from damaging the light-emitting device.

[0087] The black matrix layer 108 can be disposed on the encapsulation layer 107, and can absorb ambient light to prevent the ambient light from irradiating the light-emitting device layer 104 and being reflected by the first electrode 1041 in the light-emitting device layer 104, thereby reducing the light reflectivity of the display substrate and improving the display effect of the display substrate. The black matrix layer 108 is formed with a second light-transmitting opening 1081, and the second light-transmitting opening 1081 can be disposed corresponding to the pixel opening 1051 of the black pixel defining layer 105, and can transmit the light emitted by the light-emitting device in the pixel opening 1051 to realize the display function.

[0088] In some embodiments, Figure 2 As shown, the orthographic projection area of ​​the second light-transmitting opening 1081 on the substrate 101 is larger than the orthographic projection area of ​​the pixel opening 1051 on the substrate.

[0089] The area of ​​the second light-transmitting opening 1081 may be slightly larger than the area of ​​the pixel opening 1051, and the second light-transmitting opening 1081 may completely project the light emitted by the light-emitting device in the pixel opening 1051, while preventing the ambient light from irradiating the first electrode 1041 and causing reflection. Specifically, the second light-transmitting opening 1081 is arranged opposite to the pixel opening 1051, and the orthographic projection of the pixel opening 1051 on the substrate 101 falls within the orthographic projection of the second light-transmitting opening 1081 on the substrate 101.

[0090] In some embodiments, a distance between an edge of an orthographic projection of the spacer 106 on the substrate 101 and an edge of an orthographic projection of the black matrix layer 108 on the substrate 101 is greater than or equal to 1.58 micrometers.

[0091] A certain distance is set between the edge of the spacer 106 and the edge of the black matrix layer 108 to prevent the black matrix layer 108 from blocking the light emitted by the light-emitting device in the pixel opening 1051 and affecting the display effect. Specifically, the distance between the edge of the spacer 106 and the edge of the black matrix layer 108 can be greater than or equal to 1.58 microns, for example, 1.58 microns.

[0092] In some embodiments, Figure 2As shown, the display substrate further includes: a color filter layer 109 ; the color filter layer 109 includes: a plurality of color filters 1091 ; each color filter 1091 covers the second light-transmitting opening 1081 respectively.

[0093] The second light-transmitting opening 1081 in the black matrix layer 108 can project part of the ambient light to the first electrode 1041 of the light-emitting device, and the first electrode 1041 can reflect the part of the ambient light, and the reflected light can pass through the color filter 1091 in the color filter layer 109, and the ambient light can be filtered into light of corresponding colors. For example, the color of the color filter 1091 is the same as the color of the light-emitting device in the corresponding pixel opening 1051. In this way, the ambient light can be filtered into the light required for display, thereby improving the utilization rate of light and the display brightness of the display substrate.

[0094] In some embodiments, the black matrix layer 108 further has a third light-transmitting opening (not shown) disposed between some of the second light-transmitting openings 1081 ; the orthographic projection of the third light-transmitting opening on the substrate 101 at least partially overlaps with the orthographic projection of the first light-transmitting opening 1052 on the substrate 101 .

[0095] The third light-transmitting opening of the black matrix layer 108 can be arranged opposite to the first light-transmitting opening 1052 of the black pixel defining layer to prevent the black matrix layer 108 from blocking the light of the first light-transmitting opening 1052 and affecting the light sensing effect. Specifically, the orthographic projection area of ​​the third light-transmitting opening on the substrate 101 is larger than the orthographic projection area of ​​the first light-transmitting opening 1052 on the substrate 101. The orthographic projection of the first light-transmitting opening 1052 on the substrate 101 falls within the orthographic projection of the third light-transmitting opening on the substrate 101.

[0096] Figures 7a to 7e A schematic diagram of the structure of each film layer of another display substrate provided in an embodiment of the present disclosure, such as Figure 1e and Figure 7e As shown, the driving circuit layer 102 has a plurality of first hollow portions L1 ; the orthographic projection of the first hollow portions L1 on the substrate 101 at least partially overlaps with the orthographic projection of the overlapping vias V on the substrate 101 .

[0097] Each first hollow portion L1 may correspond to two overlapping vias V. When the first electrodes 1041 of two different light-emitting devices are overlapped, they may be led to different signal lines respectively to avoid short circuit between the two different first electrodes 1041 and affect the display effect.

[0098] In some embodiments, Figure 1eAs shown, the driving circuit layer 102 further has a flat portion P between adjacent first hollow portions L1 ; the orthographic projection of the flat portion P on the substrate 101 at least partially overlaps with the orthographic projection of the pixel opening 1051 on the substrate 101 .

[0099] The pixel opening 1051 may be arranged corresponding to the flat portion P, and the signal line in the driving circuit layer 102 may be routed at a position corresponding to the flat portion P, so as to facilitate electrical connection between the signal line and the first electrode 1041 of the light-emitting device.

[0100] In some embodiments, Figure 7e As shown, the driving circuit layer 102 further has a second hollow portion L2 ; the orthographic projection of the second hollow portion L2 on the substrate 101 at least partially overlaps with the orthographic projection of the pixel opening 1051 on the substrate 101 .

[0101] The pixel opening 1051 may be provided corresponding to the second hollow portion L2 , and the signal line in the driving circuit layer 102 may be routed at a position corresponding to the second hollow portion L2 , so as to facilitate electrical connection between the signal line and the first electrode 1041 of the light-emitting device.

[0102] In a second aspect, an embodiment of the present disclosure provides a display device, which includes a display substrate as provided in any of the above embodiments. The display device can be any product or component with a display function, such as a television, a mobile phone, a monitor, a notebook computer, a digital photo frame, a navigator, etc. The implementation principle is similar to that of the above display substrate, and will not be repeated here.

[0103] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display substrate having a first display area and a second display area, wherein: The display substrate comprises: a substrate, a driving circuit layer, at least one planarization layer, and a light-emitting device layer sequentially arranged on the substrate; the light-emitting device layer comprises: a plurality of light-emitting devices; the light-emitting device comprises: a first electrode; the first electrode is electrically connected to the driving circuit layer through a lapped via hole penetrating at least one planarization layer; the display substrate further comprises: a black pixel defining layer located on a side of the planarization layer away from the substrate and a spacer located on a side of the black pixel defining layer away from the substrate; In the first display area, the black pixel defining layer has a plurality of pixel openings exposing the first electrode; the orthographic projection of the spacer on the substrate does not overlap with the orthographic projection of the pixel opening and the orthographic projection of the overlapping via on the substrate; In the second display area, the black pixel defining layer also has a first light-transmitting opening located between some adjacent pixel openings; the orthographic projection of the spacer on the substrate does not overlap with the orthographic projections of the pixel opening and the first light-transmitting opening on the substrate, and at least partially overlaps with the orthographic projection of the overlapping via on the substrate.

2. The display substrate according to claim 1, wherein: In the first display area, some of the pixel openings are irregular in shape, and their orientations are periodically arranged in the first direction, and at least two pixel openings with different orientations are arranged in each period; When the pixel opening faces a direction close to the spacer, the difference between the distance between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate is less than a threshold value; When the pixel opening faces a direction away from the spacer, the difference between the distances between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate is greater than a threshold.

3. The display substrate according to claim 2, wherein: When the pixel opening faces the direction close to the spacer, the distance between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the first direction on the substrate are both 13±0.5 micrometers; When the pixel opening is facing away from the spacer, the distance between the edge of the orthographic projection of the spacer on the substrate and the edge of the orthographic projection of one of the two adjacent pixel openings arranged in the first direction on the substrate is 13±0.5 microns, and the distance between the edge of the orthographic projection of the spacer on the substrate is 16±0.5 microns.

4. The display substrate according to claim 3, wherein: The difference between the edge of the orthographic projection of the spacer on the substrate and the edge of the orthographic projection of two adjacent pixel openings arranged in the second direction on the substrate is less than a threshold value; The second direction intersects the first direction.

5. The display substrate according to claim 4, wherein: The distance between the edge of the orthographic projection of the spacer on the substrate and the edges of the orthographic projections of two adjacent pixel openings arranged in the second direction on the substrate is 14±0.5 micrometers.

6. The display substrate according to claim 1, wherein: In the second display area, an orthographic projection of at least a portion of the spacers on the substrate partially overlaps with an orthographic projection of at least one of two adjacent overlapping vias on the substrate.

7. The display substrate according to claim 6, wherein: The orthographic projections of at least a portion of the spacers on the substrate partially overlap with the orthographic projections of two adjacent overlapping vias on the substrate.

8. The display substrate according to claim 7, wherein: The distance between the edge of the orthographic projection of at least part of the spacers on the substrate and the edge of the orthographic projection of two adjacent overlapping vias on the substrate is equal.

9. The display substrate according to claim 8, wherein: The distance between the edge of the orthographic projection of at least part of the spacers on the substrate and the edges of the orthographic projections of two adjacent overlapping vias on the substrate is 0.2 micrometers to 0.5 micrometers.

10. The display substrate according to claim 1, wherein: The length of the spacer along the first direction is 10±0.5 microns, and the length along the second direction is 13±0.5 microns; the second direction intersects with the first direction.

11. The display substrate according to claim 10, wherein: The arrangement density of the spacers is greater than or equal to 0.8%.

12. The display substrate according to claim 1, wherein: The display substrate further comprises: an encapsulation layer and a black matrix layer which are sequentially arranged on a side of the light-emitting device layer away from the substrate; the black matrix layer has a second light-transmitting opening; An orthographic projection of the second light-transmitting opening on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

13. The display substrate according to claim 12, wherein: An orthographic projection area of ​​the second light-transmitting opening on the substrate is larger than an orthographic projection area of ​​the pixel opening on the substrate.

14. The display substrate according to claim 13, wherein: The orthographic projection of the pixel opening on the substrate falls within the orthographic projection of the second light-transmitting opening on the substrate.

15. The display substrate according to claim 12, wherein: A distance between an edge of an orthographic projection of the spacer on the substrate and an edge of an orthographic projection of the black matrix layer on the substrate is greater than or equal to 1.58 micrometers.

16. The display substrate according to claim 12, wherein: The display substrate further includes: a color filter layer; the color filter layer includes: a plurality of color filters; Each of the color filters covers the second light-transmitting opening respectively.

17. The display substrate according to claim 16, wherein: The color of the color filter is the same as the color of the light emitting device in the corresponding pixel opening.

18. The display substrate according to claim 12, wherein: The black matrix layer further has a third light-transmitting opening disposed between some of the second light-transmitting openings; An orthographic projection of the third light-transmitting opening on the substrate at least partially overlaps with an orthographic projection of the first light-transmitting opening on the substrate.

19. The display substrate according to claim 18, wherein: An orthographic projection area of ​​the third light-transmitting opening on the substrate is larger than an orthographic projection area of ​​the first light-transmitting opening on the substrate.

20. The display substrate according to claim 19, wherein: An orthographic projection of the first light-transmitting opening on the substrate falls within an orthographic projection of the third light-transmitting opening on the substrate.

21. The display substrate according to claim 1, wherein: The driving circuit layer has a plurality of first hollow parts; An orthographic projection of the first hollow portion on the substrate at least partially overlaps with an orthographic projection of the overlapping via on the substrate.

22. The display substrate according to claim 21, wherein: The driving circuit layer further comprises a flat portion between adjacent first hollow portions; An orthographic projection of the flat portion on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

23. The display substrate according to claim 21, wherein: The driving circuit layer also has a second hollow portion; An orthographic projection of the second hollow portion on the substrate at least partially overlaps with an orthographic projection of the pixel opening on the substrate.

24. A display device, wherein: The display device comprises the display substrate according to any one of claims 1 to 23.

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