Display substrate and display device

Abstract

A display substrate is provided, comprising a substrate substrate; a driving circuit layer comprising a plurality of pixel driving circuits located in a display area and a gate driving circuit, a plurality of gate driving signal lines and an electrostatic protection unit located in a peripheral area, the plurality of pixel driving circuits are arranged along a first direction and a second direction, the gate driving circuit is located on at least one side of the plurality of pixel driving circuits along the first direction, the plurality of gate driving signal lines are electrically connected with the gate driving circuit, and the electrostatic protection unit is electrically connected with the plurality of gate driving signal lines; a light emitting device layer located on a side of the driving circuit layer away from the substrate substrate; and a color film layer located on a side of the light emitting device layer away from the substrate substrate, wherein the electrostatic protection unit comprises a plurality of electrostatic protection transistors, and the color film layer comprises a protection portion located in the peripheral area, a normal projection of the protection portion on the substrate substrate at least partially overlaps with a normal projection of the plurality of electrostatic protection transistors on the substrate substrate.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display substrate and a display device. Background Technology

[0002] Currently, medium and large-sized organic light-emitting diode (OLED) top-emitting products, due to the ability to share pixel circuitry and aperture areas, are finding diverse applications, such as transparent displays. As product quality continues to improve, the demand for narrow bezels is also increasing. How to achieve narrow bezels without causing other display defects is one of the key challenges for display product developers.

[0003] The information disclosed in this section is only for understanding the background of the inventive concept of this disclosure, and therefore may include information that does not constitute prior art. Summary of the Invention

[0004] In one aspect, a display substrate is provided, the display substrate including a display area and a peripheral area surrounding the display area, the display substrate comprising:

[0005] Substrate;

[0006] A driving circuit layer is located on the substrate. The driving circuit layer includes a plurality of pixel driving circuits located in the display area and a gate driving circuit, a plurality of gate driving signal lines, and an electrostatic discharge protection unit located in the peripheral area. The plurality of pixel driving circuits are arranged along a first direction and a second direction. The gate driving circuit is located on at least one side of the plurality of pixel driving circuits along the first direction. The plurality of gate driving signal lines are electrically connected to the gate driving circuit. The electrostatic discharge protection unit is located on one side of the gate driving circuit along the second direction and is electrically connected to the plurality of gate driving signal lines.

[0007] A light-emitting device layer is located on the side of the driving circuit layer away from the substrate; and

[0008] The color filter layer is located on the side of the light-emitting device layer away from the substrate.

[0009] The electrostatic discharge protection unit includes a plurality of electrostatic discharge protection transistors, and the color filter layer includes a protective portion located in the peripheral region. The orthographic projection of the protective portion on the substrate overlaps at least partially with the orthographic projection of the electrostatic discharge protection transistors on the substrate.

[0010] According to some exemplary embodiments, the electrostatic discharge protection unit includes a plurality of electrostatic discharge protection parts arranged at intervals along the second direction, and the plurality of electrostatic discharge protection parts are electrically connected to a plurality of gate drive signal lines respectively;

[0011] Wherein, the orthographic projection of the side of the protective portion closest to the display area along the second direction onto the substrate is closer to the display area than the orthographic projection of the electrostatic protection portion closest to the display area onto the substrate; and / or

[0012] The orthographic projection of the side of the protective portion away from the display area along the second direction on the substrate is farther away from the display area than the orthographic projection of the electrostatic protection portion that is furthest away from the display area on the substrate.

[0013] According to some exemplary embodiments, at least one of the electrostatic discharge protection portions includes a first protection portion and a second protection portion distributed along the first direction, the first protection portion including at least one first electrostatic discharge protection transistor, the second protection portion including at least one second electrostatic discharge protection transistor, and the second protection portion being closer to the center of the display area than the first protection portion;

[0014] Wherein, the orthographic projection of the side of the protective portion away from the center of the display area along the first direction onto the substrate is further away from the center of the display area than the orthographic projection of the first protective portion onto the substrate; and / or,

[0015] The orthographic projection of the side of the protective part near the center of the display area along the first direction on the substrate is closer to the center of the display area than the orthographic projection of the second protective part on the substrate.

[0016] According to some exemplary embodiments, the driving circuit layer further includes a first connection trace and a first electrostatic path located in the peripheral area, the first connection trace extending along the second direction and located on the side of the first protective portion away from the second protective portion, and the first electrostatic path located on the side of a plurality of first protective portions away from the display area.

[0017] The first connection trace is electrically connected to multiple first protective parts and the first electrostatic path, respectively.

[0018] The orthographic projection of the side of the protective portion away from the center of the display area along the first direction onto the substrate is further away from the center of the display area than the orthographic projection of the connecting trace onto the substrate; and / or,

[0019] The driving circuit layer further includes a second connection trace and a second electrostatic path located in the peripheral area. The second connection trace extends along the second direction and is located on the side of the second protective part away from the first protective part. The second electrostatic path is located on the side of a plurality of second protective parts away from the display area.

[0020] The second connection traces are electrically connected to multiple second protective parts and the second electrostatic path, respectively.

[0021] The orthographic projection of the side of the protective portion near the center of the display area along the first direction on the substrate is closer to the center of the display area than the orthographic projection of the second connection trace on the substrate.

[0022] According to some exemplary embodiments, the orthographic projection of the protective portion on the substrate overlaps with the orthographic projection portion of the first electrostatic path on the substrate; and / or,

[0023] The orthographic projection of the protective portion on the substrate overlaps with the orthographic projection of the second electrostatic path on the substrate.

[0024] According to some exemplary embodiments, the plurality of gate drive signal lines include a plurality of second signal lines, each second signal line including a first signal segment extending along the second direction, the first signal segment being located on the side of the second protective portion away from the first protective portion; and

[0025] The orthographic projection of the protective portion on the substrate overlaps with the orthographic projection portion of at least one of the first signal segments on the substrate.

[0026] According to some exemplary embodiments, the display substrate further includes a cover plate and a frame adhesive, the cover plate being located on the side of the color filter layer away from the substrate, and the frame adhesive being located between the substrate and the cover plate and surrounding the display area;

[0027] The material of the frame adhesive includes a photocurable material. The orthographic projection of the frame adhesive on the substrate overlaps with the orthographic projection of the gate driving circuit on the substrate. The orthographic projection of the frame adhesive on the substrate is spaced apart from the orthographic projection of the protective part on the substrate.

[0028] According to some exemplary embodiments, the color filter layer includes a black matrix layer, a red color filter layer, a green color filter layer, and a blue color filter layer, and the protective portion is located in at least one of the black matrix layer and the blue color filter layer.

[0029] According to some exemplary embodiments, the protective portion on the substrate has a rectangular shape.

[0030] According to some exemplary embodiments, the orthographic projection of the frame adhesive on the substrate includes an annular projection portion, and the orthographic projection of the electrostatic protection unit on the substrate is located within the annular projection portion.

[0031] According to some exemplary embodiments, at least a portion of the electrostatic discharge protection unit is located on one side of the display area along the second direction.

[0032] According to some exemplary embodiments, the plurality of gate drive signal lines include a plurality of second signal lines, the second signal lines including a first signal segment extending along the second direction and a second signal segment extending along the first direction, the first signal segment being located on the side of the second protection portion away from the first protection portion, and the second signal segment being located on the side of the electrostatic protection unit close to the display area.

[0033] According to some exemplary embodiments, the second signal line further includes a third signal segment extending along the second direction, the third signal segment being located on the side of the electrostatic discharge protection unit near the display area and electrically connected to the second signal segment; and

[0034] The orthographic projection of the electrostatic protection unit on the substrate is closer to the center of the display area in the first direction than the orthographic projection of at least one of the third signal segments on the substrate.

[0035] According to some exemplary embodiments, the display substrate further includes a cover plate and a frame adhesive. The cover plate is located on the side of the color filter layer away from the substrate, and the frame adhesive is located between the substrate and the cover plate. A gap layer is provided between the color filter layer and the light-emitting device layer. The protective portion and the electrostatic discharge protection transistor are disposed on both sides of the gap layer at intervals.

[0036] According to some exemplary embodiments, the light-emitting device layer includes a first electrode layer located on the side of the driving circuit layer away from the substrate, a light-emitting functional layer located on the side of the first electrode layer away from the substrate, and a second electrode layer located on the side of the light-emitting functional layer away from the substrate, wherein the orthographic projection of the first electrode layer on the substrate is spaced apart from the orthographic projection of the electrostatic discharge transistor on the substrate.

[0037] In another aspect, a display device is provided, the display device comprising a display substrate as described in any of the preceding claims. Attached Figure Description

[0038] Other objects and advantages of this disclosure will become apparent from the following description of the disclosure with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the disclosure.

[0039] Figure 1 A schematic plan view of a display substrate according to some embodiments of the present disclosure is shown.

[0040] Figure 2 A cross-sectional view of a display substrate according to some embodiments of the present disclosure is shown schematically.

[0041] Figure 3 The diagram illustrates a burning phenomenon on a display substrate according to some embodiments of the present disclosure.

[0042] Figure 4 A schematic plan view of a display substrate according to some embodiments of the present disclosure is shown.

[0043] Figure 5 Schematic illustration Figure 4 A magnified view of region B in the middle.

[0044] Figure 6 A cross-sectional view of a display substrate according to some embodiments of the present disclosure is shown schematically.

[0045] Figure 7 Schematic illustration Figure 5 A magnified view of region C in the middle.

[0046] Figure 8 Schematic illustration Figure 5 A magnified view of region C in the middle, where, Figure 8 It is mainly used to schematically illustrate the structure of the electrostatic protection unit located in area C.

[0047] It should be noted that, for clarity, the dimensions of layers, structures, or regions in the accompanying drawings used to describe embodiments of this disclosure may be enlarged or reduced; that is, these drawings are not drawn to actual scale. Detailed Implementation

[0048] In the following description, numerous specific details are set forth for illustrative purposes to provide a comprehensive understanding of various exemplary embodiments. However, it will be apparent that various exemplary embodiments may be implemented without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but not necessarily exclusive. For example, specific shapes, configurations, and characteristics of exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0049] In the accompanying drawings, the dimensions and relative dimensions of the elements may be enlarged for clarity and / or descriptive purposes. Thus, the dimensions and relative dimensions of the individual elements are not necessarily limited to those shown in the drawings. When exemplary embodiments can be implemented differently, the specific process sequence may be performed differently than the order described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of description. Furthermore, the same reference numerals denote the same elements.

[0050] When an element is described as being "on" another element, "connected to" another element, or "attached to" another element, the element may be directly on, directly connected to, or directly attached to the other element, or there may be intermediate elements present. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly attached to" another element, there are no intermediate elements. Other terms and / or expressions used to describe relationships between elements should be interpreted in a similar manner, such as "between" versus "directly between," "adjacent" versus "directly adjacent," or "on" versus "directly on," etc. Furthermore, the term "connection" can refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection. Additionally, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z such as XYZ, XY, YZ, and XZ. As used herein, the term “and / or” includes any and all combinations of one or more of the listed related items.

[0051] It should be understood that although the terms first, second, etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. For example, without departing from the scope of the exemplary embodiments, a first element may be named a second element, and similarly, a second element may be named a first element.

[0052] Figure 1 A schematic plan view of a display substrate according to some embodiments of the present disclosure is shown.

[0053] Reference Figure 1The display substrate includes a display area AA and a peripheral area NA surrounding the display area AA. A gate driving circuit GOA is disposed in the peripheral area NA, and a pixel driving circuit PDC is disposed within the display area AA. The gate driving circuit GOA is located on at least one side of the display area AA along a first direction X, and is used to provide gate signals to the pixel driving circuit PDC. The peripheral area NA also includes an electrostatic discharge (ESD) protection unit 400 electrically connected to the gate driving circuit GOA. The ESD protection unit 400 is located on one side of the gate driving circuit GOA along a second direction Y, and is used to release static charge in the gate driving circuit GOA, preventing ESD damage to the gate driving circuit GOA and thus avoiding display defects.

[0054] The surrounding area NA is also encapsulated with a frame adhesive that surrounds the display area AA. The inventors discovered that using ultraviolet (UV) curable adhesive to form the frame adhesive helps to narrow its width and provides better encapsulation. However, this leads to characteristic drift in the transistors of the electrostatic discharge (ESD) protection unit 400, causing a large current to be generated within the ESD protection unit 400, which can then lead to the burnout of the ESD protection unit 400.

[0055] Further research by the inventors revealed that the reason for the characteristic drift of the transistors in the electrostatic protection unit 400 is that during the curing process of the frame adhesive, the transistors in the electrostatic protection unit 400 are also irradiated by UV light, which is one of the key influencing factors causing the characteristic drift of the transistors in the electrostatic protection unit 400.

[0056] Figure 2 A cross-sectional view of a display substrate according to some embodiments of the present disclosure is shown schematically.

[0057] Reference Figure 2 The display substrate includes a substrate 100, a driving circuit layer 200 located on the substrate 100, and a light-emitting device layer 300 located on the side of the driving circuit layer 200 away from the substrate 100. The transistor of the electrostatic discharge protection unit 400 is located in the driving circuit layer 200. The light-emitting device layer 300 includes a first electrode layer 310, which includes a light-shielding portion 312. The orthographic projection of the light-shielding portion 312 on the substrate at least partially overlaps with the orthographic projection of the transistor of the electrostatic discharge protection unit 400 on the substrate. That is, the light-shielding portion located in the first electrode layer 310 shields the transistor of the electrostatic discharge protection unit 400, preventing it from being exposed to UV light during the curing process of the sealant and causing characteristic drift.

[0058] Figure 3 The diagram illustrates a burning phenomenon on a display substrate according to some embodiments of the present disclosure.

[0059] Reference Figure 3 , Figure 2 Even after the schematic display substrate is shielded by the light-shielding portion 312 located on the first electrode layer 310, the electrostatic discharge protection unit 400 still frequently burns out. Figure 3 The area indicated by the dashed box.

[0060] Based on this problem, the inventors conducted a simulation analysis of the transistors in the electrostatic discharge protection unit 400 of the display substrate, and the results are shown in Table 1 below.

[0061] Table 1

[0062]

[0063] The structure of the display substrate 1 is as follows: Figure 2 As shown, the structure of display substrate 2 is similar to that of display substrate 1, except that a light-shielding portion located on the first electrode layer 310 is not provided above the transistor in the electrostatic discharge protection unit 400. Furthermore, neither display substrate 1 nor display substrate 2 underwent a frame adhesive curing process (that is, neither display substrate 1 nor display substrate 2 was exposed to UV light). Additionally, test points 1-4 are the points in the electrostatic discharge protection unit 400 in display substrate 1 where burn-out occurred.

[0064] As can be seen from the data in Table 1, the reverse scan current is significantly increased when Vth is -2.5V compared to the simulated current value when Vth is 0V. Furthermore, compared to display substrate 2, both the forward and reverse scan currents at each test point on display substrate 1 show varying degrees of increase. This verifies that even without UV light irradiation, the presence of a light-shielding portion 312 located above the transistor in the electrostatic discharge protection unit 400, situated on the first electrode layer 310, still causes characteristic drift in the transistor of the electrostatic discharge protection unit 400.

[0065] Through extensive research, the inventors discovered that the key reason why the transistor in the electrostatic discharge protection unit 400 exhibits characteristic drift is that the light-shielding part 312 located above the transistor in the first electrode layer 310 is too close to the transistor in the electrostatic discharge protection unit 400. This hinders the outgassing of gas within the electrostatic discharge protection unit 400. Incomplete outgassing causes characteristic drift in the transistor in the electrostatic discharge protection unit 400, leading to frequent power-on burnout of the electrostatic discharge protection unit 400.

[0066] Figure 4 A schematic plan view of a display substrate according to some embodiments of the present disclosure is shown. Figure 5 Schematic illustration Figure 4 A magnified view of region B in the middle. Figure 6A cross-sectional view of a display substrate according to some embodiments of the present disclosure is shown schematically.

[0067] Combined with reference Figure 4 , Figure 5 and Figure 6 The display substrate includes a display area AA and a peripheral area NA located around the display area AA. The display substrate includes a substrate 100, a driving circuit layer 200 located on the substrate 100, a light-emitting device layer 300 located on the side of the driving circuit layer 200 away from the substrate 100, and a color filter layer CF located on the side of the light-emitting device layer 300 away from the substrate 100.

[0068] The driving circuit layer 200 includes multiple pixel driving circuits PDC located in the display area AA, a gate driving circuit GOA located in the peripheral area NA, multiple gate driving signal lines GL, and an electrostatic discharge protection unit 400. The multiple pixel driving circuits PDC are arranged along a first direction X and a second direction Y. The gate driving circuit GOA is located on at least one side of the multiple pixel driving circuits PDC along the first direction X. The multiple gate driving signal lines GL are electrically connected to the gate driving circuit GOA. The electrostatic discharge protection unit 400 is electrically connected to the multiple gate driving signal lines GL, thereby eliminating the static charge accumulated in the gate driving signal lines GL and preventing electrostatic discharge damage.

[0069] The light-emitting device layer 300 includes a first electrode layer 310 located on the side of the driving circuit layer 200 away from the substrate 100, a light-emitting layer 320 located on the side of the first electrode layer 310 away from the substrate 100, and a second electrode layer 330 located on the side of the light-emitting layer 320 away from the substrate 100. The first electrode layer 310 includes a plurality of first electrodes 311 spaced apart in the display area AA. A pixel defining layer PDL is disposed between the first electrode layer 310 and the light-emitting layer 320. The pixel defining layer PDL has a plurality of openings KK spaced apart in the display area AA, each opening KK exposing a portion of one of the first electrodes 311. The light-emitting layer 320 contacts the first electrodes 311 through the openings KK, and the second electrode layer 330 contacts the light-emitting layer 320. A first electrode 311, a portion of the light-emitting layer 320 above the first electrode 311, and a portion of the second electrode layer 330 constitute a light-emitting device.

[0070] The color filter layer CF includes a red color filter layer CF1, a green color filter layer CF2, a blue color filter layer CF3, and a black matrix layer BM. The red color filter layer CF1 includes multiple red color filter elements CF1a spaced apart within the display area AA; the green color filter layer CF2 includes multiple green color filter elements CF2a spaced apart within the display area AA; and the blue color filter layer CF3 includes multiple blue color filter elements CF3a spaced apart within the display area AA. The black matrix layer BM fills the spaces between the multiple red color filter elements CF1a, the multiple green color filter elements CF2a, and the multiple blue color filter elements CF3a. The multiple openings KK include multiple first openings KK1, multiple second openings KK2, and multiple third openings KK3. The orthographic projections of multiple red color film portions CF1a on the substrate cover the orthographic projections of the multiple first openings KK1 on the substrate, the orthographic projections of multiple green color film portions CF2a on the substrate cover the orthographic projections of the multiple second openings KK2 on the substrate, and the orthographic projections of multiple blue color film portions CF3a on the substrate cover the orthographic projections of the multiple third openings KK3 on the substrate.

[0071] The display substrate also includes a protective portion 500 located on the color filter layer CF, meaning that the protective portion 500 is formed simultaneously during the formation of the color filter layer CF. The electrostatic discharge (ESD) protection unit 400 includes multiple ESD protection transistors (TFTs). The protective portion 500 is located in the peripheral region NA, and its orthographic projection on the substrate at least partially overlaps with the orthographic projection of the ESD protection transistors (TFTs) on the substrate. By providing the protective portion 500 located on the color filter layer CF, it can block curing light from reaching the ESD protection transistors (TFTs) during the curing process of the sealant 600, thereby preventing performance drift caused by the ESD protection transistors (TFTs) being exposed to curing light. Furthermore, the protective portion 500 is located a considerable distance from the ESD protection transistors (TFTs), thus not significantly hindering gas release within the ESD protection transistors (TFTs) and preventing performance drift due to incomplete gas release from the ESD protection transistors (TFTs).

[0072] According to some exemplary embodiments, in conjunction with reference to Figure 4 and Figure 5 The display substrate may also include a functional bus line located in the peripheral area NA. The functional bus line is located on one side of the electrostatic protection unit 400 along the first direction and on one side of the display area AA along the second direction. The functional bus line can be used to transmit a power signal, which can be a first power signal (VDD) connected to the first electrode, or the power signal can be a second power signal (VSS) connected to the second electrode layer.

[0073] According to some exemplary embodiments, refer to Figure 6The driving circuit layer 200 includes a light-shielding layer LS on the substrate 100, a buffer layer Buf on the side of the light-shielding layer LS away from the substrate 100, an active layer ACT on the side of the buffer layer Buf away from the substrate 100, a gate insulating layer GI on the side of the active layer ACT away from the substrate 100, a gate metal layer Gate on the side of the gate insulating layer GI away from the substrate 100, an interlayer insulating layer ILD on the side of the gate metal layer Gate away from the substrate 100, and a source / drain metal layer SD on the side of the interlayer insulating layer ILD away from the substrate 100.

[0074] According to some exemplary embodiments, refer to Figure 6 The display substrate also includes a passivation layer PVX located on the side of the source / drain metal layer SD away from the substrate 100, and a planarization layer PLN located between the passivation layer PVX and the first electrode layer 310. The first electrode 311 is electrically connected to the transistor in the pixel driving circuit through vias in the planarization layer PLN and the passivation layer PVX.

[0075] According to some exemplary embodiments, refer to Figure 6 The protective portion 500 is located in at least one of the black matrix layer BM and the blue color filter layer CF3. It has been verified that when the adhesive 600 material includes a UV-curable material, the black matrix layer BM and the blue color filter layer CF3 have better absorption effects on UV light. Therefore, placing the protective portion 500 in at least one of the black matrix layer BM and the blue color filter layer CF3 is more effective in blocking curing light (including UV light) from reaching the electrostatic discharge transistor TFT. For example, the protective portion 500 is located in either the black matrix layer BM or the blue color filter layer CF3. Alternatively, the protective portion 500 may be located in both the black matrix layer BM and the blue color filter layer CF3. In other words, the protective portion 500 is composed of a protective sub-part located in the black matrix layer BM and a protective sub-part located in the blue color filter layer CF3 stacked together.

[0076] According to some exemplary embodiments, refer to Figure 6 The display substrate also includes a cover plate CG and a frame adhesive 600. The cover plate CG is located on the side of the color filter layer CF away from the substrate 100, that is, the color filter layer CF is located on the side of the cover plate CG closer to the substrate 100. The substrate 100, on which the driving circuit layer 200 and the light-emitting device are disposed, can be referred to as the first substrate M, and the cover plate CG, on which the color filter layer CF is disposed, can be referred to as the second substrate N. After the first substrate M and the second substrate N are fabricated, an adhesive layer surrounding the display area AA can be formed on one side of the first substrate M (the surface away from the substrate 100). After the second substrate N is aligned and bonded to the first substrate M, the adhesive layer is irradiated with curing light (e.g., including UV light) to cure the adhesive layer into the frame adhesive 600, thus obtaining the desired product. Figure 6 A schematic diagram of a display substrate.

[0077] Continue to refer to Figure 6 A gap layer 700 is provided between the color filter layer CF in the second substrate N and the light-emitting device layer 300 in the first substrate M. The gap layer 700 may contain air, inert gas or be in a vacuum state. Correspondingly, the protective part 500 located in the color filter layer CF and the electrostatic discharge protection transistor TFT located in the driving circuit layer 200 are located on both sides of the gap layer 700, so that the gas in the electrostatic discharge protection transistor TFT can be fully released.

[0078] According to some exemplary embodiments, refer to Figure 6 The orthographic projection of the first electrode layer 310 on the substrate is spaced apart from the orthographic projection of the electrostatic protection transistor TFT on the substrate. After the protective part 500 located in the color filter layer CF achieves the effect of blocking the curing light irradiation of the electrostatic protection transistor TFT, the first electrode layer 310 can be avoided from the electrostatic protection transistor TFT to prevent the first electrode layer 310 from affecting the gas release inside the electrostatic protection transistor TFT.

[0079] Figure 7 Schematic illustration Figure 5 A magnified view of region C in the middle. Figure 8 Schematic illustration Figure 5 A magnified view of region C in the middle, where, Figure 8 Primarily used to schematically illustrate the structure of the electrostatic discharge protection unit located in region C, therefore Figure 8 Structures such as the protective section have been omitted.

[0080] According to some exemplary embodiments, in conjunction with reference to Figure 5 , Figure 7 and Figure 8 The electrostatic discharge protection unit 400 includes a plurality of electrostatic discharge protection parts 410 arranged at intervals along the second direction Y. Each electrostatic discharge protection part 410 includes at least one electrostatic discharge protection transistor TFT. The plurality of electrostatic discharge protection parts 410 are electrically connected to a plurality of gate drive signal lines GL respectively. That is, one electrostatic discharge protection part 410 is used to release the static charge accumulated on a gate drive signal line GL.

[0081] According to some exemplary embodiments, in conjunction with reference to Figure 5 , Figure 7 and Figure 8 The orthographic projection of the side of the protection part 500 along the second direction Y that is closer to the display area AA on the substrate is closer to the display area AA than the orthographic projection of the electrostatic protection part 410 that is closest to the display area AA on the substrate. The orthographic projection of the side of the protection part 500 along the second direction Y that is farther away from the display area AA on the substrate is farther away from the display area AA than the orthographic projection of the electrostatic protection part 410 that is far away from the display area AA on the substrate.

[0082] In other words, the protection unit 500 is located on one side of the second direction Y. Figure 7 The illustrated side (located on the upper side) is compared to the electrostatic discharge protection part 410 closest to the display area AA. Figure 7 and Figure 8 The uppermost electrostatic discharge protection section 410 (shown in the diagram) is closer to the display area AA, while the protection section 500 is located on one side of the other side in the second direction Y. Figure 7 The illustrated side (located on the lower side) is compared to the electrostatic discharge protection part 410, which is furthest from the display area AA. Figure 7 and Figure 8 The bottommost electrostatic protection section 410 (shown in the diagram) is further away from the display area AA, so as to ensure that the protection section 500 covers all the multiple electrostatic protection sections 410 distributed along the second direction Y, thereby improving the light-shielding effect of the protection section 500 on the electrostatic protection unit 400.

[0083] According to some exemplary embodiments, in conjunction with reference to Figure 4 , Figure 5 , Figure 7 and Figure 8 At least one electrostatic discharge protection part 410 includes a first protection part 411 and a second protection part 412 distributed along the first direction X. The first protection part 411 includes at least one first electrostatic discharge protection transistor TFT1, and the second protection part 412 includes at least one second electrostatic discharge protection transistor TFT2. The second protection part 412 is closer to the center Q of the display area AA than the first protection part 411.

[0084] The orthographic projection of the side of the protective part 500 away from the center Q of the display area AA along the first direction X on the substrate is farther away from the center Q of the display area AA than the orthographic projection of the first protective part 411 on the substrate. The orthographic projection of the side of the protective part 500 close to the center Q of the display area AA along the first direction X on the substrate is closer to the center Q of the display area AA than the orthographic projection of the second protective part 412 on the substrate.

[0085] In other words, the protection part 500 is located on one side of the first direction X. Figure 7 The side shown (on the left) is farther from the end of the first protective part 411 than the end of the second protective part 412. Figure 7 and Figure 8 The left end of the first protective part 411 (shown in the diagram) is further away from the center Q of the display area AA, and the protective part 500 is located on one side of the other side in the second direction Y. Figure 7 The side shown is located on the right side, which is farther away from the first protective part 411 than the second protective part 412. Figure 7 and Figure 8The right end of the second protective section 412 (shown in the diagram) is closer to the center Q of the display area AA, so as to ensure that the protective section 500 covers all the multiple electrostatic protection transistors TFTs distributed along the second direction Y in the electrostatic protection subsection, thereby improving the light shielding effect of the protective section 500 on the electrostatic protection unit 400.

[0086] For example, the first protection part 411 may include two first electrostatic discharge protection transistors TFT1 connected in series along the first direction X, and the second protection part 412 may include two second electrostatic discharge protection transistors TFT2 connected in series along the first direction X. The first protection part 411 and the second protection part 412 are connected in parallel.

[0087] It should be noted that, depending on the signal transmitted on the gate drive signal line GL connected to the electrostatic discharge protection unit 410, one part of the electrostatic discharge protection unit 410 includes a first protection unit 411 and a second protection unit 412, which together are used to release the static charge in the connected gate drive signal line GL; another part of the electrostatic discharge protection unit 410 includes only the first protection unit 411, which is used to release the static charge in the connected gate drive signal line GL.

[0088] According to some exemplary embodiments, in conjunction with reference to Figure 4 , Figure 7 and Figure 8 The driving circuit layer 200 also includes a first connection trace 421 and a first electrostatic path 431 located in the peripheral area NA. The first connection trace 421 extends along the second direction Y and is located on the side of the first protective part 411 away from the second protective part 412. The first electrostatic path 431 is located on the side of the plurality of first protective parts 411 away from the display area AA. The first connection trace 421 is electrically connected to the plurality of first protective parts 411 and the first electrostatic path 431, respectively. That is, one end of the first protective part 411 is electrically connected to the corresponding gate driving signal line GL, and the other end of the first protective part 411 is electrically connected to the first connection trace 421 and then electrically connected to the first electrostatic path 431 through the first connection trace 421.

[0089] The orthographic projection of the side of the protective part 500 along the first direction X away from the center Q of the display area AA on the substrate is further away from the center Q of the display area AA than the orthographic projection of the connecting trace on the substrate. In other words, the protective part 500 is located on one side of the first direction X. Figure 7 The side shown (on the left) is farther from the end of the first protective part 411 than the end of the second protective part 412. Figure 7 and Figure 8The left end of the first protective part 411 (shown in the diagram) protrudes a predetermined distance away from the center Q of the display area AA. By increasing the shielding area of ​​the protective part 500, the problem of side-propagating curing light shining on the electrostatic protection transistor TFT and causing its performance drift can be effectively prevented.

[0090] For example, the first protection section 411 may include two first electrostatic discharge protection transistors TFT1. When the positive static charge accumulated in the connected gate drive signal line GL reaches a certain amount, the gate drive signal line GL will output a high voltage signal. The high voltage signal causes the first electrostatic discharge protection transistors TFT1 in the first protection section 411 to be turned on. The high voltage signal will be pulled down by the low voltage signal in the first electrostatic path 431, thereby achieving the effect of eliminating static electricity.

[0091] According to some exemplary embodiments, in conjunction with reference to Figure 4 , Figure 7 and Figure 8 The driving circuit layer 200 also includes a second connection trace 422 and a second electrostatic path 432 located in the peripheral area NA. The second connection trace 422 extends along the second direction Y and is located on the side of the second protective part 412 away from the first protective part 411. The second electrostatic path 432 is located on the side of the plurality of second protective parts 412 away from the display area AA. The second connection trace 422 is electrically connected to the plurality of second protective parts 412 and the second electrostatic path 432, respectively. That is, one end of the second protective part 412 is electrically connected to the corresponding gate driving signal line GL, and the other end of the second protective part 412 is electrically connected to the second connection trace 422 and then electrically connected to the second electrostatic path 432 through the second connection trace 422.

[0092] The orthographic projection of the side of the protective part 500 along the first direction X near the center Q of the display area AA on the substrate is closer to the center Q of the display area AA than the orthographic projection of the second connection trace 422 on the substrate. In other words, the protective part 500 is located on the other side of the first direction X. Figure 7 The side shown is located on the right side, which is farther away from the first protective part 411 than the second protective part 412. Figure 7 and Figure 8 The right end of the second protective part 412 (shown in the diagram) protrudes a predetermined distance toward the center Q of the display area AA. By increasing the shielding area of ​​the protective part 500, the problem of side-propagating curing light shining on the electrostatic protection transistor TFT and causing its performance drift can be effectively prevented.

[0093] For example, the second protection section 412 may include two second electrostatic discharge protection transistors TFT2. When the negative static charge accumulated in the connected gate drive signal line GL reaches a certain amount, the gate drive signal line GL will output a low voltage signal. The low voltage signal causes the second electrostatic discharge protection transistors TFT2 in the second protection section 412 to be turned on. The low voltage signal will be pulled up by the high voltage signal in the second electrostatic path 432, thereby achieving the effect of eliminating static electricity.

[0094] For example, the first connection trace 421 and the second connection trace 422 can be located in the light-shielding layer LS, and the first electrostatic path 431 and the second electrostatic path 432 can be located in the gate metal layer Gate.

[0095] According to some exemplary embodiments, in conjunction with reference to Figure 5 , Figure 7 and Figure 8 The orthographic projection of the protective part 500 on the substrate overlaps with the orthographic projection of the first electrostatic path 431 on the substrate, and the orthographic projection of the protective part 500 on the substrate overlaps with the orthographic projection of the second electrostatic path 432 on the substrate.

[0096] In other words, the protection unit 500 is located on one side of the second direction Y. Figure 7 The illustrated side (located on the lower side) is compared to the electrostatic discharge protection part 410, which is furthest from the display area AA. Figure 7 and 8 The lower ends of the first protective part 411 and the second protective part 412 (shown in the diagram) protrude a predetermined distance away from the display area AA. By increasing the shielding area of ​​the protective part 500, the problem of side-propagating curing light shining on the electrostatic protection transistor TFT and causing its performance drift can be effectively avoided.

[0097] According to some exemplary embodiments, in conjunction with reference to Figure 5 , Figure 7 and Figure 8 The multiple gate drive signal lines GL include multiple first signal lines GL1. The multiple first signal lines GL1 extend along the second direction Y and are arranged along the first direction X. The multiple first signal lines GL1 are located on the side of the electrostatic discharge protection unit 400 away from the display area AA along the first direction X. The drive circuit layer 200 also includes multiple third connection traces 423 located in the peripheral area NA. The multiple third connection traces 423 extend along the first direction X and are arranged along the second direction Y. Multiple electrostatic discharge protection units 410 are electrically connected to the multiple first signal lines GL1 respectively through the multiple third connection traces 423.

[0098] According to some exemplary embodiments, in conjunction with reference to Figure 4 , Figure 5 , Figure 7 and Figure 8 The multiple gate drive signal lines GL include multiple second signal lines GL2. Each second signal line GL2 includes a first signal segment GL21 extending along the second direction Y. The first signal segment GL21 is located on the side of the second protection portion 412 away from the first protection portion 411. The drive circuit layer also includes multiple fourth connection traces 424 located in the peripheral region NA. Multiple electrostatic discharge (ESD) protection portions 410 are electrically connected to the multiple second signal lines GL2 via the multiple fourth connection traces 424. The orthographic projection of the protection portion 500 on the substrate overlaps with the orthographic projection of at least one first signal segment GL21 on the substrate. For example, the orthographic projection of the protection portion 500 on the substrate overlaps with the orthographic projection of the first signal segment GL21 closest to the ESD protection unit 400 on the substrate. That is, the protection portion 500 is located on a side of the first direction X (…). Figure 7 The side shown is located on the right side, which is farther away from the first protective part 411 than the second protective part 412. Figure 7 and Figure 8 The right end of the second protective part 412 (shown in the diagram) protrudes a predetermined distance toward the center Q of the display area AA. By increasing the shielding area of ​​the protective part 500, the problem of side-propagating curing light shining on the electrostatic protection transistor TFT and causing its performance drift can be effectively prevented.

[0099] For example, the gate drive signal transmitted by the first signal line GL1 is an AC signal, and the gate drive signal transmitted by the second signal line GL2 is a DC signal. The line width of the second signal line GL2 is greater than the line width of the first signal line GL1. The number of first signal lines GL1 and the number of second signal lines GL2 depend on the actual circuit design, and this embodiment does not limit this.

[0100] According to some exemplary embodiments, refer to Figure 7 The shape of the protective portion 500 on the substrate 100 may include a rectangle.

[0101] According to some exemplary embodiments, in conjunction with reference to Figure 4 and Figure 5 The orthographic projection of the frame adhesive 600 on the substrate overlaps with the orthographic projection of the gate drive circuit GOA on the substrate. By overlapping the frame adhesive 600 and the gate drive circuit GOA, the bezel of the display substrate can be narrowed.

[0102] According to some exemplary embodiments, in conjunction with reference to Figure 4 and Figure 5The frame adhesive 600 is made of a photocurable material. That is, the frame adhesive 600 is obtained by first forming an adhesive layer, then curing the adhesive layer by exposing it to light. Based on this, the protective portion 500 is positioned away from the frame adhesive 600, meaning that the orthographic projection of the frame adhesive 600 on the substrate is spaced apart from the orthographic projection of the protective portion 500 on the substrate. This avoids the problem of incomplete curing of the frame adhesive 600 due to obstruction by the protective portion 500 during the curing process.

[0103] According to some exemplary embodiments, in conjunction with reference to Figure 4 and Figure 5 The orthographic projection of the adhesive 600 on the substrate overlaps with the orthographic projection of the gate drive circuit GOA on the substrate. The orthographic projection of the adhesive 600 on the substrate includes an annular projection portion, and the orthographic projection of the electrostatic discharge (ESD) protection unit 400 on the substrate is located within the annular projection portion. The ESD protection unit 400 is moved a predetermined distance closer to the display area AA, so that the ESD protection unit 400 is positioned away from the adhesive 600. In addition to being shielded by the protection unit 500, this further prevents the curing light during the curing process of the adhesive 600 from irradiating the ESD protection transistor TFT.

[0104] According to some exemplary embodiments, refer to Figure 4 and Figure 5 At least a portion of the electrostatic discharge (ESD) protection unit 400 is located on one side of the display area AA along the second direction Y. That is, at least one virtual straight line extending along the second direction simultaneously passes through the orthographic projection of the ESD protection unit 400 onto the substrate and the orthographic projection of the opening of at least one pixel defining layer onto the substrate. This ensures that the orthographic projection of the ESD protection unit 400 onto the substrate is spaced a large distance from the adhesive 600, effectively preventing the ESD protection transistor TFT from experiencing performance drift due to light irradiating it during the curing process of the adhesive 600.

[0105] According to some exemplary embodiments, in conjunction with reference to Figure 5 and Figure 8 The second signal line GL2 includes a first signal segment GL21 extending along the second direction Y and a second signal segment GL22 extending along the first direction X. The first signal segment GL21 is located on the side of the second protective part 412 away from the first protective part 411, and the second signal segment GL22 is located on the side of the electrostatic protection unit 400 close to the display area AA. The first signal segment GL21 and the second signal segment GL22 are electrically connected. Since the electrostatic protection unit 400 is positioned away from the frame adhesive 600, at least a portion of the electrostatic protection unit 400 is located on the side of the display area AA along the second direction Y. Based on this, the second signal line GL2 is bent to avoid the electrostatic protection unit 400.

[0106] According to some exemplary embodiments, in conjunction with reference to Figure 4 , Figure 5 , Figure 7 and Figure 8 The second signal line GL2 also includes a third signal segment GL23 extending along the second direction Y. The third signal segment GL23 is located on the side of the electrostatic discharge protection unit 400 closer to the display area AA. One end of the third signal segment GL23 is electrically connected to the second signal segment GL22, and the other end extends along the second direction Y away from the electrostatic discharge protection unit 400 and is electrically connected to the gate drive circuit GOA. The orthographic projection of the electrostatic discharge protection unit 400 on the substrate is closer to the center Q of the display area AA in the first direction X than the orthographic projection of at least one third signal segment GL23 on the substrate.

[0107] For example, the orthographic projection of the electrostatic protection unit 400 on the substrate is closer to the center Q of the display area AA in the first direction X than the orthographic projection of the third signal segment GL23 on the substrate closest to the display area AA.

[0108] The inventors discovered through research that by setting the position of the electrostatic protection unit 400 as described above, the problem of performance drift of the electrostatic protection transistor TFT caused by the curing light during the curing process of the frame adhesive 600 irradiating the electrostatic protection transistor TFT can be effectively avoided.

[0109] It should be noted that, in this document, the orthogonal projection of the electrostatic discharge (ESD) protection unit 400 onto the substrate should be understood as the orthogonal projection of the active portion of the ESD protection transistor TFT in the ESD protection unit 400 onto the substrate. This embodiment effectively avoids the problem of performance deviation of the ESD protection transistor TFT caused by curing light irradiating the active portion of the ESD protection transistor TFT in the ESD protection unit 400 during the frame adhesive curing process by shielding the active portion of the ESD protection transistor TFT in the ESD protection unit 400 and by setting the position of the active portion of the ESD protection transistor TFT in the ESD protection unit 400.

[0110] At least some embodiments of this disclosure also provide a display device comprising the display substrate described above. The display device may include any device or product with display functionality. For example, the display device may be a smartphone, mobile phone, e-book reader, desktop computer (PC), laptop PC, netbook PC, personal digital assistant (PDA), portable multimedia player (PMP), digital audio player, mobile medical device, camera, wearable device (e.g., head-mounted device, electronic clothing, electronic bracelet, electronic necklace, electronic accessory, electronic tattoo, or smartwatch), television set, etc.

[0111] It should be understood that the display device according to some exemplary embodiments of this disclosure has all the features and advantages of the display substrate described above, which can be referred to in the above description of the display substrate and will not be repeated here.

[0112] As used herein, the terms “substantially,” “approximately,” “about,” and other similar terms are used as terms of approximation rather than as terms of degree, and they are intended to account for inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), “approximately” or “about” as used herein includes the stated value and indicates that the particular value is within an acceptable range of deviation for one of ordinary skill in the art. For example, “approximately” may mean within one or more standard deviations, or within ±10% or ±5% of the stated value.

[0113] While some embodiments based on the general inventive concept of this disclosure have been illustrated and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display substrate, wherein, The display substrate includes a display area and a peripheral area surrounding the display area. The display substrate includes: Substrate; A driving circuit layer is located on the substrate. The driving circuit layer includes a plurality of pixel driving circuits located in the display area and a gate driving circuit, a plurality of gate driving signal lines, and an electrostatic discharge protection unit located in the peripheral area. The plurality of pixel driving circuits are arranged along a first direction and a second direction. The gate driving circuit is located on at least one side of the plurality of pixel driving circuits along the first direction. The plurality of gate driving signal lines are electrically connected to the gate driving circuit. The electrostatic discharge protection unit is electrically connected to the plurality of gate driving signal lines. A light-emitting device layer is located on the side of the driving circuit layer away from the substrate; and The color filter layer is located on the side of the light-emitting device layer away from the substrate. The electrostatic discharge protection unit includes a plurality of electrostatic discharge protection transistors, and the color filter layer includes a protective portion located in the peripheral region. The orthographic projection of the protective portion on the substrate overlaps at least partially with the orthographic projection of the plurality of electrostatic discharge protection transistors on the substrate. The light-emitting device layer includes a first electrode layer located on the side of the driving circuit layer away from the substrate, a light-emitting functional layer located on the side of the first electrode layer away from the substrate, and a second electrode layer located on the side of the light-emitting functional layer away from the substrate. The orthographic projection of the first electrode layer on the substrate is spaced apart from the orthographic projection of the electrostatic discharge transistor on the substrate.

2. The display substrate according to claim 1, wherein, The electrostatic discharge protection unit includes a plurality of electrostatic discharge protection parts arranged at intervals along the second direction, and the plurality of electrostatic discharge protection parts are electrically connected to the plurality of gate drive signal lines respectively; as well as Wherein, the orthographic projection of the side of the protective part near the display area along the second direction on the substrate is closer to the display area than the orthographic projection of the electrostatic protection part closest to the display area on the substrate; And / or, the orthographic projection of the side of the protective portion away from the display area along the second direction on the substrate is farther away from the display area than the orthographic projection of the electrostatic protection portion furthest from the display area on the substrate.

3. The display substrate according to claim 2, wherein, At least one of the electrostatic discharge (ESD) protection portions includes a first protection portion and a second protection portion distributed along the first direction. The first protection portion includes at least one first ESD protection transistor, and the second protection portion includes at least one second ESD protection transistor. The second protection portion is closer to the center of the display area than the first protection portion. Wherein, the orthographic projection of the side of the protective part away from the center of the display area along the first direction on the substrate is farther away from the center of the display area than the orthographic projection of the first protective part on the substrate; and / or, the orthographic projection of the side of the protective part close to the center of the display area along the first direction on the substrate is closer to the center of the display area than the orthographic projection of the second protective part on the substrate.

4. The display substrate according to claim 3, wherein, The driving circuit layer further includes a first connection trace and a first electrostatic discharge path located in the peripheral region. The first connection trace extends along the second direction and is located on the side of the first protective portion away from the second protective portion. The first electrostatic discharge path is located on the side of the plurality of first protective portions away from the display area. The first connection trace is electrically connected to the plurality of first protective portions and the first electrostatic discharge path, respectively. The orthographic projection of the side of the protective portion away from the center of the display area along the first direction on the substrate is further away from the center of the display area than the orthographic projection of the connection trace on the substrate; and / or The driving circuit layer further includes a second connection trace and a second electrostatic path located in the peripheral region. The second connection trace extends along the second direction and is located on the side of the second protective portion away from the first protective portion. The second electrostatic path is located on the side of the plurality of second protective portions away from the display area. The second connection trace is electrically connected to the plurality of second protective portions and the second electrostatic path, respectively. The orthographic projection of the side of the protective portion near the center of the display area along the first direction on the substrate is closer to the center of the display area than the orthographic projection of the second connection trace on the substrate.

5. The display substrate according to claim 4, wherein, The orthographic projection of the protective portion on the substrate overlaps with the orthographic projection of the first electrostatic path on the substrate. And / or, The orthographic projection of the protective portion on the substrate overlaps with the orthographic projection of the second electrostatic path on the substrate.

6. The display substrate according to any one of claims 3-5, wherein, The plurality of gate drive signal lines include a plurality of second signal lines, each second signal line including a first signal segment extending along the second direction, the first signal segment being located on the side of the second protective portion away from the first protective portion; as well as The orthographic projection of the protective portion on the substrate overlaps with the orthographic projection portion of at least one of the first signal segments on the substrate.

7. The display substrate according to claim 6, wherein, The display substrate further includes a cover plate and a frame adhesive. The cover plate is located on the side of the color filter layer away from the substrate, and the frame adhesive is located between the substrate and the cover plate and surrounds the display area. The material of the frame adhesive includes a photocurable material. The orthographic projection of the frame adhesive on the substrate overlaps with the orthographic projection of the gate driving circuit on the substrate. The orthographic projection of the frame adhesive on the substrate is spaced apart from the orthographic projection of the protective part on the substrate.

8. The display substrate according to any one of claims 1-5, wherein, The color filter layer includes a black matrix layer, a red color filter layer, a green color filter layer, and a blue color filter layer, and the protective part is located in at least one of the black matrix layer and the blue color filter layer.

9. The display substrate according to any one of claims 1-5, wherein, The protective portion on the substrate has a rectangular shape.

10. The display substrate according to claim 7, wherein, The orthographic projection of the frame adhesive on the substrate includes an annular projection portion, and the orthographic projection of the electrostatic protection unit on the substrate is located within the annular projection portion.

11. The display substrate according to claim 10, wherein, At least a portion of the electrostatic protection unit is located on one side of the display area along the second direction.

12. The display substrate according to claim 10 or 11, wherein, The plurality of gate drive signal lines include a plurality of second signal lines, each second signal line including a first signal segment extending along the second direction and a second signal segment extending along the first direction. The first signal segment is located on the side of the second protective portion away from the first protective portion, and the second signal segment is located on the side of the electrostatic protection unit close to the display area.

13. The display substrate according to claim 12, wherein, The second signal line further includes a third signal segment extending along the second direction, the third signal segment being located on the side of the electrostatic protection unit near the display area and electrically connected to the second signal segment; and The orthographic projection of the electrostatic protection unit on the substrate is closer to the center of the display area in the first direction than the orthographic projection of at least one of the third signal segments on the substrate.

14. The display substrate according to any one of claims 1-5, 10-11, and 13, wherein, The display substrate further includes a cover plate and a frame adhesive. The cover plate is located on the side of the color filter layer away from the substrate. The frame adhesive is located between the substrate and the cover plate. A gap layer is provided between the color filter layer and the light-emitting device layer. The protective part and the electrostatic discharge protection transistor are disposed on both sides of the gap layer at intervals.

15. A display device, wherein, The display device includes a display substrate according to any one of claims 1-14.

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