Display substrate and display device

Abstract

The present invention relates to the technical field of display, and discloses a display substrate and a display device. The display substrate includes: a base substrate; a pixel definition layer located on one side of the base substrate, the pixel definition layer having multiple openings; and multiple organic light-emitting structures located in the multiple openings, with at least some of the multiple organic light-emitting structures having a first concave-convex structure on the side facing the base substrate. The pixel definition layer disposed on one side of the base substrate has multiple openings for accommodating the multiple organic light-emitting structures, that is, the multiple organic light-emitting structures are located in the multiple openings, and at least some of the multiple organic light-emitting structures have a first concave-convex structure on the side facing the base substrate. The first concave-convex structure of the organic light-emitting structures results in different light-emitting angles, thereby increasing the angle of light emission of the organic light-emitting structures and providing an anti-counterfeiting feature compared to existing fixed single two-dimensional images.

Description

Technical Field

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

[0002] There are many types of anti-counterfeiting technologies currently available, the most common of which are: paper scratch-off labels, laser holographic peel-off labels, paper (laser) peel-off labels with a bottom, and laser holographic peel-off labels.

[0003] Anti-counterfeiting labels, also known as anti-counterfeiting trademarks, are labels that can be affixed, printed, or transferred to the surface of an object, its packaging, or its accessories (such as product tags, business cards, and anti-counterfeiting certificates). Anti-counterfeiting is a preventative measure against unauthorized imitation or reproduction for fraudulent purposes.

[0004] However, existing products with anti-counterfeiting labels are easily copied by criminals, leading to rampant counterfeiting and replication, which seriously disrupts the competition mechanism in the legitimate market and causes huge losses to the owners (usually legitimate manufacturers) and consumers. Therefore, it is necessary to find a new type of anti-counterfeiting label that is easy to identify and extremely difficult to copy. Summary of the Invention

[0005] The invention discloses a display substrate and a display device, which are used to improve the anti-counterfeiting performance of an anti-counterfeiting label.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a display substrate comprising:

[0008] substrate,

[0009] A pixel definition layer is located on one side of the base substrate, and the pixel definition layer has a plurality of openings;

[0010] A plurality of organic light-emitting structures are located at the plurality of openings, and at least some of the organic light-emitting structures have a first concave-convex structure on a side facing the base substrate.

[0011] A pixel definition layer is provided on one side of the base substrate, and the pixel definition layer has a plurality of openings for accommodating a plurality of organic light-emitting structures, that is, the plurality of organic light-emitting structures are located in the plurality of openings, and at least some of the plurality of organic light-emitting structures have a first concave-convex structure on the side facing the base substrate. The first concave-convex structure of the organic light-emitting structure causes a different light-emitting angle, so that the light-emitting angle changes, thereby increasing the light-emitting angle of the organic light-emitting structure, and can display different patterns at different angles. The interaction of multiple patterns increases the anti-counterfeiting feature compared to the existing fixed single two-dimensional image.

[0012] Optionally, it also includes: an anode layer, the anode layer is located on the side of the base substrate facing the pixel definition layer, the anode layer partially exposes the opening, and the surface of the anode layer on the side in contact with the organic light-emitting structure has a second concave-convex structure, and the second concave-convex structure is concavely matched with the first concave-convex structure.

[0013] Optionally, the method further comprises: a flat layer located on a side of the base substrate facing the anode layer, the flat layer having a first surface and a second surface opposite to each other, the first surface facing the base substrate, and the second surface having a third concave-convex structure;

[0014] The surface of the anode layer that contacts the second surface of the flat layer has a fourth concave-convex structure, and the fourth concave-convex structure is matched with the third concave-convex structure; the distance between the side of the anode layer facing the organic light-emitting structure and the side of the anode layer facing the flat layer remains unchanged.

[0015] Optionally, the pixel definition layer includes:

[0016] A pixel separator is formed around each of the multiple openings; wherein, in at least one of the multiple openings, the pixel separator includes a top surface, a bottom surface and at least one side surface connecting the top surface and the bottom surface, the area of ​​the top surface is smaller than the area of ​​the bottom surface, and at least one side surface of the side surfaces of the pixel separator facing the opening has a different slope angle from the other side surfaces.

[0017] Optionally, at least one side surface of the pixel separator facing the opening has a step along a direction from the top surface to the bottom surface, so as to divide the side surface into a first sub-side surface and a second sub-side surface.

[0018] Optionally, the slope angle of the first sub-side surface is the same as the slope angle of the second sub-side surface.

[0019] Optionally, the slope angle of the first sub-side surface is different from the slope angle of the second sub-side surface.

[0020] Optionally, the plurality of organic light-emitting structures include at least three colors, and the plurality of organic light-emitting structures are arranged in a one-to-one correspondence with the plurality of openings.

[0021] Optionally, the inner sidewalls of the openings corresponding to the organic light-emitting structures of the same color have the same structure.

[0022] Optionally, the plurality of organic light-emitting structures include a first color organic light-emitting structure, a second color organic light-emitting structure and a third color organic light-emitting structure arranged in sequence;

[0023] The first color organic light emitting structure and the third color organic light emitting structure are mirror-imaged relative to the second color organic light emitting structure.

[0024] Optionally, the first color organic light emitting structure is a red organic light emitting structure, the second color organic light emitting structure is a green organic light emitting structure; and the third color organic light emitting structure is a blue organic light emitting structure;

[0025] The area of ​​the orthographic projection of the first concave-convex structure corresponding to the red organic light-emitting structure on the base substrate is S1, the area of ​​the orthographic projection of the first concave-convex structure corresponding to the green organic light-emitting structure on the base substrate is S2, and the area of ​​the orthographic projection of the first concave-convex structure corresponding to the blue organic light-emitting structure on the base substrate is S3, wherein S2 is greater than S1, and S2 is greater than S3.

[0026] Optionally, it also includes:

[0027] A cathode layer is located on a side of the pixel definition layer away from the anode layer.

[0028] Optionally, it further includes: a buffer layer; the buffer layer is located on a side of the base substrate facing the pixel definition layer.

[0029] Optionally, the invention further comprises: an inductive power supply structure, wherein the inductive power supply structure is located on a side of the buffer layer away from the substrate;

[0030] The inductive power supply structure is electrically connected to the anode layer through a first via hole penetrating the planar layer;

[0031] The inductive power supply structure is electrically connected to the cathode layer through a second via hole penetrating the planar layer and the pixel definition layer.

[0032] Optionally, the induction power supply structure includes an induction coil formed of copper alloy or aluminum alloy.

[0033] In a second aspect, the present invention provides a display device comprising the display substrate described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structural principle of a display substrate provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of a display substrate provided by an embodiment of the present invention Figure 1 ;

[0036] Figure 3 A schematic diagram of the structure of a display substrate provided by an embodiment of the present invention Figure 2 ;

[0037] Figure 4 To correspond Figure 2 A local enlargement diagram of point A in the figure Figure 1 ;

[0038] Figure 5 A schematic diagram of another display substrate provided in an embodiment of the present invention Figure 1 ;

[0039] Figure 6 A schematic diagram of another display substrate provided in an embodiment of the present invention Figure 2 ;

[0040] Figure 7 To correspond Figure 5 A local enlarged schematic diagram of point B in FIG.

[0041] Figure 8 Schematic diagram of another organic light-emitting structure of a display substrate provided by an embodiment of the present invention Figure 1 ;

[0042] Figure 9 Schematic diagram of another organic light-emitting structure of a display substrate provided by an embodiment of the present invention Figure 2 ;

[0043] Figure 10 To correspond Figure 2 A local enlargement diagram of point A in the figure Figure 2 .

[0044] Icon: 1-substrate; 2-pixel definition layer; 21-pixel separator; 211-top surface; 212-bottom surface; 213-side surface; 2131-step; 2132-first sub-side surface; 2133-second sub-side surface; 3-organic light-emitting structure; 3a-first concave-convex structure; 31-first color organic light-emitting structure; 32-second color organic light-emitting structure; 33-third color organic light-emitting structure; 4-anode layer; 41-second concave-convex structure; 42-fourth concave-convex structure; 5-flat layer; 51-third concave-convex structure; 6-cathode layer; 7-buffer layer; 8-inductive power supply structure; 91-first via hole; 92-second via hole; 10-interlayer dielectric layer; 11-packaging layer. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] Figure 1 A schematic diagram of the structural principle of a display substrate provided by an embodiment of the present invention; Figure 1 As shown, since the display substrate can perform luminous display under the drive of the driving current, by providing an inductive power supply structure 8 that can generate a driving current under specific circumstances, and placing the inductive power supply structure 8 and the display substrate in the same closed loop, the inductive power supply structure 8 can generate a driving current under specific circumstances and transmit it to the display substrate. The display substrate displays a preset pattern under the drive of the driving current, thereby enabling the display device to display a preset pattern under specific circumstances, effectively improving the anti-counterfeiting effect.

[0047] The inductive power supply structure 8 is used to generate a driving current under predetermined conditions and transmit the driving current to the organic light-emitting structure 3 in the display substrate. The organic light-emitting structure 3 is driven by the driving current to display a preset pattern. The preset pattern may include numbers, letters, trademarks, QR codes, etc.

[0048] By placing the inductive power supply structure 8 and the organic light-emitting structure 3 in the display substrate in the same closed loop, the inductive power supply structure 8 generates a driving current under specific circumstances and transmits the driving current to the organic light-emitting structure 3, causing the display substrate to display a preset pattern under the drive current. Because the inductive power supply structure 8 only generates the driving current under specific circumstances, the display substrate also only displays the preset pattern under specific circumstances. Compared to traditional anti-counterfeiting methods that rely on printing specific patterns on the surface of an object or fixing specific anti-counterfeiting structures on the object, the display device provided by the embodiments of the present invention is not easily counterfeited, and can greatly improve the anti-counterfeiting effect.

[0049] According to electromagnetic field theory, when a closed loop is located in an electric field, the electric field can cause free electrons in a conductor to move in a directional manner, forming a current. Therefore, the inductive power supply structure 8 can be configured as a conductive induction coil, which can generate an induced current when the induction coil is in an electric field.

[0050] According to electromagnetic field theory, an electric field can be generated around a changing magnetic field. When a closed loop is located in an electric field, the electric field can cause the free electrons in the conductor to move in a directional manner to form an induced current. At present, mobile terminals such as mobile phones and tablets all have NFC (Near Field Communication, short-range wireless communication technology) functions. When an alternating current is passed through the NFC coil, it can generate a changing magnetic flux, thereby forming an electric field. Therefore, when the distance between the induction coil and the NFC coil in the mobile terminal is within a certain range, the display substrate can display a preset pattern, which can achieve the purpose of anti-counterfeiting. Specifically, if Figure 1 As shown, the display substrate provided by an embodiment of the present invention includes an inductive power supply structure 8 and an organic light-emitting structure 3. The inductive power supply structure 8 is an inductive coil. Specifically, when the distance between the inductive coil and the NFC coil is within a certain range, the inductive coil is located in the electric field formed by the changing magnetic flux, generating an induced current. This current is then transmitted to the organic light-emitting structure 3 in the display substrate, causing the display substrate to display a preset pattern under the drive current.

[0051] like Figure 2 and Figure 5 As shown, in a first aspect, an embodiment of the present invention provides a display substrate, comprising:

[0052] A base substrate 1, a pixel definition layer 2, located on one side of the base substrate 1, and the pixel definition layer 2 has a plurality of openings;

[0053] The plurality of organic light-emitting structures 3 are located at the plurality of openings, and at least some of the plurality of organic light-emitting structures 3 have a first concave-convex structure 3 a on a side facing the base substrate 1 .

[0054] It should be noted that the pixel definition layer 2 provided on one side of the base substrate 1 has a plurality of openings for accommodating a plurality of organic light-emitting structures, that is, a plurality of organic light-emitting structures 3 are located in the plurality of openings, and at least some of the plurality of organic light-emitting structures 3 have a first concave-convex structure 3a on the side facing the base substrate 1. The first concave-convex structure 3a of the organic light-emitting structure 3 causes a different light-emitting angle, so that the light-emitting angle changes, and the light-emitting angle of the organic light-emitting structure 3 is increased, and different patterns can be displayed at different angles. The interaction of multiple patterns increases the anti-counterfeiting feature compared to the existing fixed single two-dimensional image.

[0055] Continue to refer Figure 2 In some specific embodiments, the display substrate provided by the embodiment of the present invention further includes: an anode layer 4, the anode layer 4 is located on the side of the base substrate 1 facing the pixel definition layer 2, the anode layer 4 partially exposes the opening, and the surface of the anode layer 4 on the side in contact with the organic light-emitting structure 3 has a second concave-convex structure 41, and the second concave-convex structure 41 is matched with the first concave-convex structure 3a. The anode layer 4 is made of a reflective conductive material, such as metal. For example, three organic light-emitting structures 3 of different colors are used as a pixel unit, and one pixel unit shares one anode layer 4. The three organic light-emitting structures 3 of different colors in one pixel unit are controlled by one anode layer 4 to work simultaneously. Since the surface of the anode layer 4 on the side in contact with the organic light-emitting structure 3 has the second concave-convex structure 41, the second concave-convex structure 41 of the anode layer 4 can be made by an etching process. Due to the presence of the second concave-convex structure 41 of the anode layer 4, the organic light-emitting structure 3 in contact with the second concave-convex structure 41 has the first concave-convex structure 3a, and the first concave-convex structure 3a is matched with the second concave-convex structure 41. The first concave-convex structure 3a of the organic light-emitting structure 3 results in different light-emission angles, causing the light-emission angle to vary. By increasing the angle of light emission from the organic light-emitting structure 3, different patterns can be displayed at different angles. The interaction of multiple patterns enhances anti-counterfeiting features compared to existing fixed, single two-dimensional images. Furthermore, because the organic light-emitting structure 3 has at least three colors, red, yellow, and blue, while the anode layer 4 simultaneously controls a single pixel unit to emit light, the first concave-convex structure 3a of each organic light-emitting structure 3 results in different light-emission angles, causing the light-emission angle to vary. This results in different angles of light emission from organic light-emitting structures 3 of different colors, which in turn causes the anode layer 4 to reflect light at different angles, resulting in a multicolored pattern displayed at different angles.

[0056] like Figure 3As shown, in other specific embodiments, the display substrate provided by the embodiment of the present invention further includes: an anode layer 4, the anode layer 4 is located on the side of the base substrate 1 facing the pixel definition layer 2, the anode layer 4 partially exposes the opening, and the surface of the anode layer 4 on the side in contact with the organic light-emitting structure 3 has a second concave-convex structure 41, and the second concave-convex structure 41 is concave-convex matched with the first concave-convex structure 3a. The anode layer 4 is made of a reflective conductive material, such as metal. For example, one organic light-emitting structure 3 is matched with one anode layer 4, and one organic light-emitting structure 3 is controlled by a single anode layer 4. Organic light-emitting structures 3 of different colors can be controlled separately by the anode layer 4 to work separately. Since the surface of the anode layer 4 on the side in contact with the organic light-emitting structure 3 has the second concave-convex structure 41, the second concave-convex structure 41 of the anode layer 4 can be made by an etching process. Due to the presence of the second concave-convex structure 41 of the anode layer 4, the organic light-emitting structure 3 in contact with the second concave-convex structure 41 has the first concave-convex structure 3a, and the first concave-convex structure 3a is concave-convex matched with the second concave-convex structure 41. The first concave-convex structure 3a of the organic light-emitting structure 3 causes the light to emit at different angles, thus varying the angle of illumination. This increased angle of illumination allows the organic light-emitting structure 3 to display different patterns at different angles. The interaction of these multiple patterns enhances anti-counterfeiting features compared to existing fixed, single, two-dimensional images. Because the anode layer 4 independently controls the operation of the different colored organic light-emitting structures 3, the display device displays a multicolored pattern.

[0057] like Figure 4 As shown, an embodiment of the present invention provides a display substrate, further comprising:

[0058] The flat layer 5 is located on the side of the base substrate 1 facing the anode layer 4. The flat layer 5 has a first surface and a second surface that are arranged opposite to each other. The first surface faces the base substrate 1, and the second surface has a third concave-convex structure 51. The surface of the anode layer 4 on the side that contacts the second surface of the flat layer 5 has a fourth concave-convex structure 42, and the fourth concave-convex structure 42 is matched with the third concave-convex structure 51. The distance between the side of the anode layer 4 facing the organic light-emitting structure 3 and the side of the anode layer 4 facing the flat layer 5 remains unchanged.

[0059] For ease of understanding, a half-tone mask is used to form a flat layer 5 with different inclination angles, that is, the second surface has a third concave-convex structure 51, and the anode layer 4 is deposited on the second surface of the flat layer 5. The surface of the anode layer 4 on the side in contact with the second surface of the flat layer 5 has a fourth concave-convex structure 42. Because the second surface of the flat layer 5 is formed with the third concave-convex structure 51 with different inclination angles, the deposited anode layer 4 is very thin, and the third concave-convex structure 51 on the second surface of the flat layer 5 will be well replicated to the anode layer 4, that is, the third concave-convex structure 51 and the fourth concave-convex structure 42 are matched to form a fourth concave-convex structure 42 with a distributed inclination angle.

[0060] In other specific embodiments, Figure 5 and Figure 6 As shown, please refer to Figure 7 , pixel definition layer 2 includes:

[0061] The pixel separator 21 is formed around each of the plurality of openings; wherein, in at least one of the plurality of openings, the pixel separator 21 includes a top surface 211, a bottom surface 212, and at least one side surface 213 connecting the top surface 211 and the bottom surface 212, the area of ​​the top surface 211 is smaller than the area of ​​the bottom surface 212, and at least one side surface 213 of the side surfaces 213 of the pixel separator 21 facing the opening has a different slope angle than the other side surfaces 213. For example, Figure 5 As shown, three organic light-emitting structures 3 of different colors are used as a pixel unit. Each pixel unit shares a single anode layer 4. The anode layer 4 controls the simultaneous operation of the three organic light-emitting structures 3 of the same pixel unit. Because at least one of the side surfaces 213 of the pixel separator 21 facing the opening has a different slope angle than the other side surfaces 213, the slope angles of the surfaces of the organic light-emitting structures 3 in contact with the pixel separator 21 are different. The different slope angles of the surfaces of the organic light-emitting structures 3 result in different light emission angles, which changes the angle of light emission. This increases the angle of light emission from the organic light-emitting structures 3 and enables the display of different patterns at different angles. This interaction of multiple patterns enhances anti-counterfeiting features compared to existing fixed, single, two-dimensional images. Furthermore, because the organic light-emitting structures 3 have at least three colors—red, yellow, and blue—while the anode layer 4 controls the simultaneous emission of a pixel unit, the different slope angles of each organic light-emitting structure 3 result in different light emission angles. Consequently, the angles of light emitted by the different colored organic light-emitting structures 3 differ, causing the anode layer 4 to reflect light at different angles, resulting in a multicolored pattern displayed at different angles.

[0062] For example, Figure 6 As shown, an organic light-emitting structure 3 is matched with an anode layer 4. By controlling an organic light-emitting structure 3 through a single anode layer 4, organic light-emitting structures 3 of different colors can be individually controlled by the anode layer 4 to operate separately. At least one of the side surfaces 213 of the pixel separator 21 facing the opening has a different slope angle than the other side surfaces 213, resulting in a different slope angle on the surface of the organic light-emitting structure 3 in contact with the pixel separator 21. The different slope angles of the surface of the organic light-emitting structure 3 result in different light-emitting angles, which changes the light-emitting angle. This increases the angle at which the organic light-emitting structure 3 emits light, allowing different patterns to be displayed at different angles. The interaction of multiple patterns increases anti-counterfeiting features compared to existing fixed single two-dimensional images. Because the anode layer 4 individually controls the operation of organic light-emitting structures 3 of different colors, the pattern displayed by the display device is colorful.

[0063] like Figure 7 As shown, at least one side surface 213 of the pixel separator 21 facing the opening has a step 2131 along the direction from the top surface 211 to the bottom surface 212 to divide the side surface 213 into a first sub-side surface 2132 and a second sub-side surface 2133 .

[0064] It is understandable that Figure 7 As an example, the blue organic light emitting structure 3 corresponding to the step 2131 of the pixel separator 21 also has a stepped structure. Similarly, the red organic light emitting structure 3 corresponding to the step 2131 of the pixel separator 21 has a step 2131, and the green organic light emitting structure 3 corresponding to the step 2131 of the pixel separator 21 may also have a step 2131. Figure 8 As shown, since the pixel separator 21 has an opening formed around its periphery, any two of the side surfaces 213 of the pixel separator 21 may have steps 2131, or any three of the side surfaces 213 may have steps 2131, or any four of the side surfaces 213 may have steps 2131. Figure 7 and Figure 8 The structures in FIG. 1 are for illustrative purposes only.

[0065] Continue to refer Figure 7 For example, the slope angle of the first sub-side surface 2132 is α1, the slope angle of the second sub-side surface 2133 is α2, and the slope angle of the side surface 213 opposite to both the first sub-side surface 2132 and the second sub-side surface 2133 is α3.

[0066] For example, the slope angle α1 of the first sub-side surface 2132 is the same as the slope angle α2 of the second sub-side surface 2133. Furthermore, the slope angle α3 of the side surface 213 that is opposite to both the first sub-side surface 2132 and the second sub-side surface 2133 is also the same as α1 and α2. For example, at least two of the slope angles α1 of the first sub-side surface 2132, the slope angle α2 of the second sub-side surface 2133, and the slope angle α3 of the side surface 213 that is opposite to both the first sub-side surface 2132 and the second sub-side surface 2133 are different, or α1, α2, and α3 are all different.

[0067] Specifically, the plurality of organic light emitting structures 3 include at least three colors, and the plurality of organic light emitting structures 3 are arranged in a one-to-one correspondence with the plurality of openings. Of course, the colors of the organic light emitting structures 3 may also include red, green, blue, white or yellow according to actual needs.

[0068] like Figure 9As shown, at least one side surface 213 of the pixel separator 21 facing the opening has two steps 2131. Alternatively, there may be multiple steps 2131. Since the pixel separator 21 has an opening formed around its perimeter, any two of the multiple side surfaces 213 of the pixel separator 21 may have steps 2131, or any three or four side surfaces 213 may have steps 2131.

[0069] In order to simplify the manufacturing process, the inner sidewalls of the openings corresponding to the organic light-emitting structures 3 of the same color have the same structure.

[0070] In some specific embodiments, the plurality of organic light-emitting structures 3 include a first color organic light-emitting structure 31 , a second color organic light-emitting structure 32 , and a third color organic light-emitting structure 33 , which are arranged in sequence;

[0071] The first color organic light emitting structure 31 and the third color organic light emitting structure 33 are mirror images relative to the second color organic light emitting structure 32. Since the display pattern of the display substrate is related to the organic light emitting structure 3, the mirror image arrangement of the organic light emitting structure 3 makes the pattern displayed by the display substrate a mirrorable pattern.

[0072] like Figure 7 and Figure 10 As shown, for example, the first color organic light-emitting structure 31 is a red organic light-emitting structure, the second color organic light-emitting structure 32 is a green organic light-emitting structure, and the third color organic light-emitting structure 33 is a blue organic light-emitting structure. The orthographic projection area of ​​the first concave-convex structure 3a corresponding to the red organic light-emitting structure on the substrate 1 is S1, the orthographic projection area of ​​the first concave-convex structure 3a corresponding to the green organic light-emitting structure on the substrate 1 is S2, and the orthographic projection area of ​​the first concave-convex structure 3a corresponding to the blue organic light-emitting structure on the substrate 1 is S3, where S2 is greater than S1, and S2 is greater than S3. In other words, the first concave-convex structure 3a corresponding to the green organic light-emitting structure is the largest. It is understood that the first concave-convex structure 3a corresponding to the green organic light-emitting structure, for example, the first concave-convex structure 3a is formed by the steps on the side of the pixel separator 21, and for example, the first concave-convex structure 3a can also be formed by the second concave-convex structure 41 of the anode layer 4.

[0073] In some specific implementations, the display substrate provided by the embodiments of the present invention further includes a cathode layer 6, which is located on the side of the pixel definition layer 2 facing away from the anode layer 4. For example, the cathode layer 6 is a transparent material, such as indium tin oxide.

[0074] In some other specific implementations, a display substrate provided by an embodiment of the present invention further includes: a buffer layer 7 ; the buffer layer 7 is located on a side of the base substrate 1 facing the pixel definition layer 2 .

[0075] The specific structure of an inductive power supply structure 8 for generating current in a display substrate provided in an embodiment of the present invention is as follows: the inductive power supply structure 8 is located on the side of the buffer layer 7 facing away from the base substrate 1; the inductive power supply structure 8 is electrically connected to the anode layer 4 through a first via 91 penetrating the planar layer 5; the inductive power supply structure 8 is electrically connected to the cathode layer 6 through a second via 92 penetrating the planar layer 5 and the pixel definition layer 2.

[0076] According to electromagnetic field theory, when a closed loop is located in an electric field, the electric field can cause free electrons in a conductor to move in a directional manner, forming a current. Therefore, the inductive power supply structure 8 can be configured as a conductive induction coil, which can generate an induced current when the induction coil is in an electric field.

[0077] The inductive power supply structure 8 is placed in the same closed loop through the first via 91, the second via 92, and the organic light-emitting structure 3. The inductive power supply structure 8 generates a driving current under specific circumstances and transmits the driving current to the organic light-emitting structure 3, so that the display substrate displays a preset pattern under the drive of the driving current.

[0078] Specifically, the inductive power supply structure 8 includes an induction coil formed of a copper alloy or an aluminum alloy. When the distance between the induction coil and the NFC coil is within a certain range, the induction coil is located in the electric field formed by the changing magnetic flux, generating an induced current. This current is then transmitted to the organic light-emitting structure 3 in the display substrate, causing the display substrate to display a preset pattern under the drive current.

[0079] The interlayer dielectric layer 10 is located between the inductive power supply structure 8 and the planar layer 5 . In order to prevent moisture from entering the organic light-emitting structure 3 , an encapsulation layer 11 is formed on the side of the cathode layer 6 facing away from the base substrate 1 .

[0080] In a second aspect, an embodiment of the present invention provides a display device, comprising the display substrate according to any one of the first aspects.

[0081] For ease of understanding, the patterns involved in the embodiments of the present invention refer to anti-counterfeiting patterns.

[0082] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A display substrate, characterized in that: include: substrate, A pixel definition layer is located on one side of the base substrate, and the pixel definition layer has a plurality of openings; a plurality of organic light-emitting structures, located at the plurality of openings, wherein at least some of the plurality of organic light-emitting structures have a first concave-convex structure on a side facing the base substrate; The pixel definition layer includes: a pixel separator, which is arranged to surround each of the multiple openings; wherein, in at least one of the multiple openings, the pixel separator includes a top surface, a bottom surface and at least one side surface connecting the top surface and the bottom surface, the area of ​​the top surface is smaller than the area of ​​the bottom surface, and at least one of the side surfaces of the pixel separator facing the opening has a different slope angle from the other side surfaces.

2. The display substrate according to claim 1, wherein: Also includes: An anode layer is located on the side of the base substrate facing the pixel definition layer, the opening exposes the anode layer, and the surface of the anode layer in contact with the organic light-emitting structure has a second concave-convex structure, and the second concave-convex structure is matched with the first concave-convex structure.

3. The display substrate according to claim 2, wherein: Also includes: a flat layer located on a side of the base substrate facing the anode layer, the flat layer having a first surface and a second surface opposite to each other, the first surface facing the base substrate, and the second surface having a third concave-convex structure; The surface of the anode layer that contacts the second surface of the flat layer has a fourth concave-convex structure, and the fourth concave-convex structure is matched with the third concave-convex structure; the distance between the side of the anode layer facing the organic light-emitting structure and the side of the anode layer facing the flat layer remains unchanged.

4. The display substrate according to claim 1, wherein At least one side surface of the pixel separator facing the opening has a step along a direction from the top surface to the bottom surface, so as to divide the side surface into a first sub-side surface and a second sub-side surface.

5. The display substrate according to claim 4, wherein: The slope angle of the first sub-side surface is the same as the slope angle of the second sub-side surface.

6. The display substrate according to claim 4, wherein: The slope angle of the first sub-side surface is different from the slope angle of the second sub-side surface.

7. The display substrate according to claim 5 or 6, characterized in that: The plurality of organic light-emitting structures include at least three colors, and the plurality of organic light-emitting structures are arranged in a one-to-one correspondence with the plurality of openings.

8. The display substrate according to claim 7, wherein: The inner sidewalls of the openings corresponding to the organic light-emitting structures of the same color have the same structure.

9. The display substrate according to claim 8, wherein: The plurality of organic light emitting structures include a first color organic light emitting structure, a second color organic light emitting structure and a third color organic light emitting structure arranged in sequence; The first color organic light emitting structure and the third color organic light emitting structure are mirror-imaged relative to the second color organic light emitting structure.

10. The display substrate according to claim 9, wherein: The first color organic light emitting structure is a red organic light emitting structure, the second color organic light emitting structure is a green organic light emitting structure; and the third color organic light emitting structure is a blue organic light emitting structure; The area of ​​the orthographic projection of the first concave-convex structure corresponding to the red organic light-emitting structure on the base substrate is S1, the area of ​​the orthographic projection of the first concave-convex structure corresponding to the green organic light-emitting structure on the base substrate is S2, and the area of ​​the orthographic projection of the first concave-convex structure corresponding to the blue organic light-emitting structure on the base substrate is S3, wherein S2 is greater than S1, and S2 is greater than S3.

11. The display substrate according to claim 3, wherein Also includes: A cathode layer is located on a side of the pixel definition layer away from the anode layer.

12. The display substrate according to claim 11, wherein: Also includes: Buffer layer; the buffer layer is located on a side of the base substrate facing the pixel definition layer.

13. The display substrate according to claim 12, wherein: Also includes: an inductive power supply structure, the inductive power supply structure being located on a side of the buffer layer facing away from the substrate; The inductive power supply structure is electrically connected to the anode layer through a first via hole penetrating the planar layer; The inductive power supply structure is electrically connected to the cathode layer through a second via hole penetrating the planar layer and the pixel definition layer.

14. The display substrate according to claim 13, wherein: The induction power supply structure includes an induction coil formed of copper alloy or aluminum alloy.

15. A display device, characterized in that: The display substrate comprises the display substrate according to any one of claims 1 to 14.

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