Display panel and display device

Abstract

The invention provides a display panel, a display module and a display device. The problem that in the prior art, OLED display products are low in reliability is solved. The display panel comprises a substrate; the at least one conductive layer is positioned on one side of the substrate; the at least one conductive layer comprises at least one signal line, and part of the signal line is located in the bonding area; the pixel definition layer is located on the side, away from the substrate, of the conductive layer, the pixel definition layer is provided with at least one hollow-out part, the hollow-out parts are located in the bonding area, and the orthographic projection of the hollow-out parts on the substrate is located between the orthographic projections of at least part of the signal lines on the substrate.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Ligt Emitting Diode (OLED) is considered to be the next generation of flat panel display technology after liquid crystal. It is popular among users for its excellent color and image quality. However, the reliability of OLED display products still needs to be improved. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a display panel, a display module and a display device, which solve the problem of low reliability of OLED display products in the prior art.

[0004] In a first aspect, the present application provides a display panel, comprising a display area and a bonding area located on one side of the display area: the display panel comprises: a substrate; at least one conductive layer located on one side of the substrate; at least one conductive layer comprising at least one signal line, part of the signal line being located in the bonding area; and a pixel definition layer located on the side of the conductive layer away from the substrate, the pixel definition layer having at least one hollow portion, the hollow portion being located in the bonding area, and the orthographic projection of the hollow portion on the substrate being located between the orthographic projections of at least part of the signal line on the substrate.

[0005] In combination with the first aspect, in some possible implementations, at least one signal line includes multiple signal lines, at least one hollow portion includes a first hollow portion, and the orthographic projection of the first hollow portion on the substrate is located between the orthographic projections of adjacent signal lines on the substrate; preferably, the first hollow portion includes a main body sub-portion, and the extension direction of the main body sub-portion and the signal line is the same; preferably, the first hollow portion also includes a plurality of extension sub-portions, and the plurality of extension sub-portions are distributed on at least one side of the main body sub-portion, and the extension sub-portion is connected to the main body sub-portion; preferably, the plurality of extension sub-portions are distributed on opposite sides of the main body sub-portion; preferably, the first hollow portion is axially symmetrical, and the axis of symmetry is parallel to the extension direction of the signal line.

[0006] In combination with the first aspect, in some possible implementations, at least one hollow portion includes a plurality of second hollow portions, and the orthographic projections of the plurality of second hollow portions on the substrate are distributed on both sides of the orthographic projection of at least one signal line on the substrate; preferably, the extension direction of the second hollow portion intersects with the extension direction of the signal line; preferably, the extension direction of the second hollow portion is perpendicular to the extension direction of the signal line; preferably, on either side of at least one signal line, the plurality of second hollow portions are arranged in parallel along the extension direction of the signal line.

[0007] In combination with the first aspect, in some possible implementations, in the bonding area, the signal line includes at least one repeating unit, and the repeating unit includes a first conductive part, a second conductive part, a third conductive part, a fourth conductive part and a fifth conductive part arranged along the extension direction of the signal line; preferably, the extension directions of the first conductive part, the third conductive part and the fifth conductive part are the same as the extension direction of the signal line, and the extension directions of the second conductive part and the fourth conductive part are opposite and both intersect with the extension direction of the signal line; preferably, any one of the first conductive part, the second conductive part, the third conductive part, the fourth conductive part and the fifth conductive part is a curve or a straight line; preferably, the second conductive part, the third conductive part and the fourth conductive part enclose a U-shaped structure, and the first conductive part and the fifth conductive part are respectively located on both sides of the opening of the U-shaped structure; preferably, at least one repeating unit includes multiple repeating units, and the multiple repeating units are arranged in sequence along the extension direction of the signal line; preferably, at least one signal line includes multiple signal lines; in the bonding area, adjacent signal lines are axially symmetrical.

[0008] In combination with the first aspect, in some possible implementations, in the bonding area, the signal line includes a straight line.

[0009] In combination with the first aspect, in some possible implementations, the display panel further includes a touch insulating layer, which is located on the side of the pixel definition layer away from the substrate; the touch insulating layer includes at least one groove, and the groove is located in the bonding area; preferably, the groove penetrates the touch insulating layer along the thickness direction of the touch insulating layer; preferably, the extension direction of the groove intersects with the extension direction of the signal line; preferably, at least one groove includes multiple grooves, and the multiple grooves are arranged in sequence along the extension direction of the signal line.

[0010] In combination with the first aspect, in some possible implementations, the orthographic projection of the groove on the substrate and the orthographic projection of the hollow portion on the substrate partially overlap; preferably, at least one hollow portion includes a first hollow portion, and the orthographic projection of the first hollow portion on the substrate is located between the orthographic projections of adjacent signal lines on the substrate; the orthographic projection of the groove on the substrate and the orthographic projection of the first hollow portion on the substrate partially overlap; preferably, the first hollow portion includes a main body sub-portion and a plurality of extension sub-portions; the main body sub-portion and the signal line have the same extension direction, the plurality of extension sub-portions are distributed on at least one side of the main body sub-portion, and the extension sub-portion is connected to the main body sub-portion; the orthographic projection of the main body sub-portion on the substrate and the orthographic projection of the groove on the substrate partially overlap, and the orthographic projection of the extension sub-portion on the substrate and the orthographic projection of the groove on the substrate overlap or do not overlap; preferably, the plurality of extension sub-portions are distributed on opposite sides of the main body sub-portion; preferably, at least one hollow portion also includes a plurality of second hollow portions, and the orthographic projections of the plurality of second hollow portions on the substrate are distributed on both sides of the orthographic projection of at least one signal line on the substrate; the orthographic projection of the second hollow portion on the substrate and the orthographic projection of the groove on the substrate overlap or do not overlap.

[0011] In combination with the first aspect, in some possible implementations, the display panel also includes a supporting structure located between the pixel definition layer and the signal line, and the orthographic projection of the supporting structure on the substrate partially overlaps with the orthographic projection of the signal line on the substrate; preferably, the orthographic projection of the supporting structure overlaps with the orthographic projection of the central part of the signal line on the substrate; preferably, the supporting structure is strip-shaped, and the extension direction of the supporting structure is perpendicular to the extension direction of the signal line; preferably, the display panel also includes a planarization layer located in the display area; the supporting structure and the planarization layer are in the same layer and material.

[0012] In combination with the first aspect, in some possible implementations, the signal line between the support structure and the substrate is a straight line; preferably, the signal line includes at least one repeating unit and a sixth conductive part, and both ends of the sixth conductive part are respectively connected to a repeating unit; the orthographic projection of the sixth conductive part on the substrate overlaps with the support structure, and the sixth conductive part is a straight line.

[0013] In combination with the first aspect, in some possible implementations, the display panel further includes at least one insulating layer, at least a portion of the insulating layer is located in the bonding area, and in the bonding area, the insulating layer is located between the signal line and the supporting structure.

[0014] In combination with the first aspect, in some possible implementations, at least one conductive layer includes a first conductive layer and a second conductive layer stacked together; at least one signal line includes a plurality of signal lines, and the plurality of signal lines are alternately arranged in the first conductive layer and the second conductive layer.

[0015] In combination with the first aspect, in some possible implementations, at least one conductive layer includes a third conductive layer, and the signal line is located in the third conductive layer; preferably, the display panel also includes a semiconductor layer located on a side of the third conductive layer away from the substrate.

[0016] In combination with the first aspect, in some possible implementations, the display panel further includes a first conductive pad and a second conductive pad located in the bonding area, the first conductive pad is connected to the first end of the signal line, and the second conductive pad is connected to the second end of the signal line.

[0017] In combination with the first aspect, in some possible implementations, the display panel also includes an isolation structure and a light-emitting device located in the display area; the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, and at least a portion of the light-emitting device is located in the isolation opening; preferably, the light-emitting device includes a stacked first electrode and a light-emitting layer, and the first electrode is located on a side of the light-emitting layer close to the substrate; the isolation opening exposes a portion of the first electrode, and the light-emitting layer is located in the isolation opening; preferably, the light-emitting device also includes a second electrode, which is located on a side of the light-emitting layer away from the substrate, and the second electrode overlaps the isolation structure.

[0018] In combination with the first aspect, in some possible implementations, the isolation structure includes a first part and a second part stacked together, the first part is located on a side of the second part close to the substrate; the orthographic projection of the first part on the substrate is located within the range of the orthographic projection of the second part on the substrate; preferably, the isolation structure also includes a third part, located on a side of the first part close to the substrate; the orthographic projection of the first part on the substrate is located within the range of the orthographic projection of the third part on the substrate; preferably, the first part includes a conductive part.

[0019] In combination with the first aspect, in some possible implementations, the pixel definition layer is located on a side of the isolation structure close to the substrate; the pixel definition layer encloses a pixel opening, the pixel opening is connected to the isolation opening, and the pixel opening exposes a portion of the first electrode.

[0020] In combination with the first aspect, in some possible implementations, the display panel also includes a packaging structure located on a side of the light-emitting device away from the substrate; the packaging structure includes a packaging portion, and the orthographic projection of the packaging portion on the substrate covers the orthographic projection of the light-emitting device on the substrate; preferably, the packaging portion extends from the isolation opening to the side of the isolation structure away from the substrate; preferably, adjacent packaging portions are disconnected on the side of the isolation structure away from the substrate; preferably, the packaging structure also includes an organic packaging layer located on a side of the packaging portion and the isolation structure away from the substrate; preferably, the packaging structure also includes an inorganic packaging layer located on a side of the organic packaging layer away from the substrate, and the orthographic projection of the inorganic packaging layer on the substrate covers the orthographic projection of the organic packaging layer on the substrate.

[0021] According to a second aspect of the present application, there is provided a display panel, comprising a display area and a bonding area located on one side of the display area: the display panel comprises: a substrate; at least one conductive layer located on one side of the substrate; at least one conductive layer comprising at least one signal line, part of the signal line being located in the bonding area; and a pixel definition layer located on the side of the conductive layer away from the substrate, the pixel definition layer having at least one hollow portion, the hollow portion being located in the bonding area; in the bonding area, the orthographic projection of the signal line on the substrate is located within the orthographic projection range of the pixel definition layer on the substrate.

[0022] A third aspect of the present application provides a display device, comprising a display panel provided by any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the top structure of a display panel provided in one embodiment of the present application.

[0024] Figure 2 The first embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown.

[0025] Figure 3 for Figure 2 The cross-sectional structure diagram of the display panel along line N1N2 is shown.

[0026] Figure 4 The second embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown.

[0027] Figure 5 for Figure 4 The cross-sectional structure diagram of the display panel along the N3N4 line is shown.

[0028] Figure 6a Shows Figure 4 A schematic diagram of the top view structure of the signal lines in the display panel is shown.

[0029] Figure 6b Shows Figure 4 A schematic diagram of the top view structure of a pixel definition layer in a display panel is shown.

[0030] Figure 6c Shows Figure 4 Schematic diagram of the stacked structure of signal lines and pixel definition layers in the display panel shown.

[0031] Figure 6d Shows Figure 4 A schematic diagram of the top structure of a touch insulating layer in a display panel is shown.

[0032] Figure 6e for Figure 4 Schematic diagram of the stacked structure of signal lines, pixel definition layers and touch insulation layers in the display panel shown.

[0033] Figure 7a The third embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown.

[0034] Figure 7b for Figure 7a The cross-sectional structure diagram of the display panel along line N5N6 is shown.

[0035] Figure 8a The fourth embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown.

[0036] Figure 8b for Figure 8a The cross-sectional structure diagram of the display panel along the N7N8 line is shown.

[0037] Fig. 9 An embodiment of the present application provides Figure 1 The cross-sectional structure diagram of the display panel along the N9N10 line is shown.

[0038] Fig.10 Another embodiment of the present application provides Figure 1The cross-sectional structure diagram of the display panel along the N9N10 line is shown.

[0039] Fig.11 A schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0040] In the related art, the display panel and the display chip are electrically connected by bonding. The high temperature and high pressure conditions during the bonding process can easily cause cracks in the film layer of the bonding area of ​​the display panel, affecting the reliability of the display product.

[0041] In view of this, an embodiment of the present application provides a display panel and a display device, which improves the reliability of the display panel by setting a hollow portion in a film layer where cracks are prone to occur in a binding area, and utilizing the hollow portion to release stress to prevent the generation and spread of cracks.

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is understood that when a structure is referred to as being "on or under" another structure, the structure may be directly on or under the other structure, or there may be intermediate structures. The same reference numerals always indicate the same structure. The structures mentioned herein include any of a film layer, an element, a device, a component, and an assembly.

[0044] When a structure is referred to as being “connected” to another structure, the structure may be directly connected to the other structure or indirectly connected to the other structure with one or more intermediate structures interposed therebetween.

[0045] A first aspect of the present application provides a display panel. Figure 1 A schematic diagram of the top structure of a display panel provided in one embodiment of the present application. Figure 2 The first embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown. Figure 3 for Figure 2 The cross-sectional structure diagram of the display panel along the N1N2 line is shown. Figure 1 , Figure 2 and Figure 3 As shown, the display panel includes a display area AA and a bonding area BA located at one side of the display area AA. Figure 2An enlarged view of a local area Q of the bonding area BA is shown. Exemplarily, the bonding area BA may be a bonding area BA for bonding a display chip (IC). Accordingly, the display panel may adopt a chip on PI (COP) packaging process.

[0046] The display panel includes a substrate 11, at least one conductive layer 12 and a pixel definition layer 13. At least one conductive layer 12 is located on one side of the substrate 11. At least one conductive layer 12 includes at least one signal line 120, and part of the signal line 120 is located in the bonding area BA. The pixel definition layer 13 is located on the side of the conductive layer 12 away from the substrate 11. The pixel definition layer 13 has at least one hollow portion Q, and the hollow portion Q is located in the bonding area BA. The orthographic projection of the hollow portion Q on the substrate 11 is located between the orthographic projection of at least part of the signal line 120 on the substrate 11, that is, the orthographic projection of the hollow portion Q on the substrate 11 and the orthographic projection of the signal line 120 on the substrate 11 do not overlap.

[0047] Wherein, the substrate 11 may be a glass-based substrate. In some embodiments, the substrate 11 may include an organic resin material such as epoxy resin, triazine, silicone resin or polyimide. For example, the substrate 11 may be an FR4 type printed circuit board (PCB), or may be a flexible PCB that is easily deformed. In some embodiments, the substrate 11 may include a ceramic material such as silicon nitride, aluminum nitride or aluminum oxide, or may include a metal or a metal compound.

[0048] The signal line 120 is used to transmit an external electrical signal to a sub-pixel in the display panel. Exemplarily, the signal line 120 includes at least one of a power signal line, an initialization signal line, and a data signal line. The shape of the signal line 120 can be a straight line, a curve, a broken line, an irregular line, etc. In the case where the shape of the signal line 120 is a non-straight line, the pixel definition layer 13 corresponding to the area between adjacent signal lines 120 can be dug out, thereby preventing the cracks in the pixel definition layer 13 from extending into a straight line, effectively preventing the cracks in the pixel definition layer 13 from extending. The pixel definition layer 13 corresponding to the signal line 120 is retained to prevent the etching process in the display panel preparation process from damaging the signal line 120 and causing a break.

[0049] The pixel definition layer 13 can provide protection for the signal line 120 during the preparation of the display panel, so that the signal line 120 is protected from etching damage. In the bonding area BA, the orthographic projection of the signal line 120 on the substrate 11 is located within the orthographic projection range of the pixel definition layer 13 on the substrate 11, that is, the pixel definition layer 13 is provided at any position of the signal line 120 on the side away from the substrate 11, and the orthographic projection of the hollow portion Q on the substrate 11 does not overlap with the orthographic projection of the signal line 120 on the substrate 11. The shape of the hollow portion Q in the pixel definition layer 13 can be a broken line, a curve, an irregular shape, etc. The shapes of different hollow portions Q can be the same or different.

[0050] The display panel further includes a support structure 15 located between the pixel definition layer 13 and the signal line 120. The orthographic projection of the support structure 15 on the substrate 11 partially overlaps with the orthographic projection of the signal line 120 on the substrate 11.

[0051] In one embodiment, the orthographic projection of the support structure 15 overlaps with the orthographic projection of the central portion of the signal line 120 on the substrate 11. Specifically, the signal line 120 includes a central portion, a first edge portion, and a second edge portion, and the first edge portion, the central portion, and the second edge portion are sequentially connected along the extension direction of the signal line 120, such as the first direction x. The orthographic projection of the central portion on the substrate 11 overlaps with the orthographic projection of the support structure 15 on the substrate 11, that is, the support structure 15 is located on the side of the central portion of the signal line 120 away from the substrate 11.

[0052] In one embodiment, the support structure 15 is in a strip shape, and the extension direction of the support structure 15 intersects with the extension direction of the signal line 120, for example, the extension direction of the support structure 15 is perpendicular to the extension direction of the signal line 120. Exemplarily, the signal line 120 extends along a first direction x, and the support structure 15 extends along a second direction y, and the second direction y is perpendicular to the first direction x.

[0053] The display panel further includes at least one insulating layer 16, at least part of which is located in the bonding area BA. In the bonding area BA, the insulating layer 16 is located between the signal line 120 and the support structure 15. Exemplarily, the at least one insulating layer 16 includes at least one of a barrier layer, a buffer layer, a gate insulating layer, a capacitor insulating layer, and an interlayer dielectric layer.

[0054] like Figure 1 As shown, the display panel further includes a plurality of conductive pads 17 located in the bonding area BA. The plurality of conductive pads 17 include a first conductive pad 171 and a second conductive pad 172. The first conductive pad 171 is connected to a first end of the signal line 120, and the second conductive pad 172 is connected to a second end of the signal line 120.

[0055] According to the display panel provided in this embodiment, by setting a hollow portion Q in the pixel definition layer 13, the hollow portion Q can be used to release the concentrated stress in the pixel definition layer 13, thereby preventing the generation and spread of cracks in the pixel definition layer 13. At the same time, the orthographic projection of the hollow portion Q on the substrate 11 is further set to be located between at least part of the signal lines 120, that is, the orthographic projection of the hollow portion Q on the substrate 11 and the orthographic projection of the signal line 120 on the substrate 11 do not overlap, ensuring that the pixel definition layer 13 is set at any position on the side of the signal line 120 away from the substrate 11, ensuring that the pixel definition layer 13 can provide protection for the signal line 120 during the preparation process of the display panel from damage caused by etching. Combining these two factors, the reliability of the display panel is improved.

[0056] Figure 4 The second embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown. Figure 5 for Figure 4 The cross-sectional structure diagram of the display panel along the N3N4 line is shown. Figure 6a-6e for Figure 4 The figure shows a schematic diagram of the film structure after the display panel is disassembled. Figure 4 Shows Figure 1 The figure shows an enlarged view of a local area S of the bonding area BA of the display panel.

[0057] Figure 6a Shows Figure 4 A schematic diagram of the top view structure of the signal lines in the display panel is shown. Figure 6b Shows Figure 4 A schematic diagram of the top view structure of a pixel definition layer in a display panel is shown. Figure 6c Shows Figure 4 The schematic diagram of the stacked structure of the signal line and the pixel definition layer in the display panel is shown. Figure 4 , Figure 5 , Figure 6a-6c As shown, at least one signal line 120 includes a plurality of signal lines 120. At least one hollow portion Q in the pixel definition layer 13 includes a first hollow portion Q1, and the orthographic projection of the first hollow portion Q1 on the substrate 11 is located between the orthographic projections of adjacent signal lines 120 on the substrate 11.

[0058] The shape of the first hollow portion Q1 is adapted to the shape of the spacing area between adjacent signal lines 120. Exemplarily, the first hollow portion Q1 includes a main body sub-portion Q11, and the main body sub-portion Q11 and the signal line 120 extend in the same direction. Exemplarily, the main body sub-portion Q11 and the signal line 120 both extend along the first direction x.

[0059] In one embodiment, the first hollow portion Q1 may further include a plurality of extension sub-portions Q12. The plurality of extension sub-portions Q12 are distributed on at least one side of the main body sub-portion Q11. The extension sub-portion Q12 is connected to the main body sub-portion Q11. Exemplarily, the plurality of extension sub-portions Q12 are distributed on opposite sides of the main body sub-portion Q11.

[0060] In one embodiment, the first hollow portion Q1 is axisymmetric, and the axis of symmetry is parallel to the extension direction of the signal line 120. Exemplarily, the axis of symmetry is parallel to the first direction x.

[0061] In one embodiment, in combination Figure 4 , Figure 5 , Figure 6a-6c The at least one hollow portion Q shown includes a plurality of second hollow portions Q2, and the orthographic projections of the plurality of second hollow portions Q2 on the substrate 11 are distributed on both sides of the orthographic projection of at least one signal line 120 on the substrate 11. Here, at least one signal line 120 is regarded as a whole, and the second hollow portions Q2 are distributed on both sides of the whole of at least one signal line 120 in the second direction y. The second direction y intersects with the first direction x. Exemplarily, the extension direction of the second hollow portion Q2 intersects with the extension direction of the signal line 120. Exemplarily, the extension direction of the second hollow portion Q2 is perpendicular to the extension direction of the signal line 120, that is, the second hollow portion Q2 extends along the second direction y, and the second direction y is perpendicular to the first direction x.

[0062] In one embodiment, in combination Figure 4 , Figure 5 , Figure 6a-6c As shown, on any side of at least one signal line 120 , a plurality of second hollow portions Q2 are arranged in parallel along the extending direction of the signal line 120 .

[0063] In one embodiment, Figure 6a As shown, in the bonding area BA, the signal line 120 includes at least one repeating unit, which includes a first conductive portion ab, a second conductive portion bc, a third conductive portion cd, a fourth conductive portion de, and a fifth conductive portion ef arranged along the extending direction of the signal line 120 .

[0064] In one embodiment, the extending direction of the first conductive portion ab, the third conductive portion cd, and the fifth conductive portion ef is the same as the extending direction of the signal line 120. The extending directions of the second conductive portion bc and the fourth conductive portion de are opposite and cross the extending direction of the signal line 120. Exemplarily, the first conductive portion ab, the third conductive portion cd, and the fifth conductive portion ef all extend along the first direction x, the second conductive portion bc extends in the opposite direction of the second direction y, and the fourth conductive portion de extends along the second direction y.

[0065] Any one of the first conductive portion ab, the second conductive portion bc, the third conductive portion cd, the fourth conductive portion de and the fifth conductive portion ef is a curve or a straight line. Exemplarily, the second conductive portion bc, the third conductive portion cd and the fourth conductive portion de enclose a U-shaped structure, and the first conductive portion ab and the fifth conductive portion ef are respectively located on both sides of the opening of the U-shaped structure.

[0066] In one embodiment, the at least one repeating unit includes a plurality of repeating units, and the plurality of repeating units are sequentially arranged along an extending direction of the signal line 120 , such as the first direction x.

[0067] In one embodiment, the at least one signal line 120 includes a plurality of signal lines 120. In the bonding area BA, adjacent signal lines 120 are axially symmetrical.

[0068] Figure 6d Shows Figure 4 A schematic diagram of the top structure of a touch insulating layer in a display panel is shown. Figure 6e for Figure 4 The schematic diagram of the stacked structure of the signal line, pixel definition layer and touch insulating layer in the display panel is shown. Figure 4 , Figure 5 , Figure 6d and Figure 6e As shown, in this embodiment, the display panel further includes a touch insulating layer 14, which is located on the side of the pixel definition layer 13 away from the substrate 11. In the bonding area BA, the touch insulating layer 14 includes at least one groove 140. By providing the groove 140, the touch insulating layer 14 can present a plurality of island structures independent of each other, or a connected structure with a hole, or include both an island structure and a connected structure, so that the groove 140 can be used to block the extension of cracks in the touch insulating layer 14.

[0069] In one embodiment, the groove 140 penetrates the touch insulating layer 14 along the thickness direction of the touch insulating layer 14 .

[0070] In one embodiment, the extending direction of the groove 140 intersects with the extending direction of the signal line 120. Exemplarily, the signal line 120 extends along a first direction x, and the groove 140 extends along a second direction y.

[0071] In one embodiment, the at least one groove 140 includes a plurality of grooves 140, and the plurality of grooves 140 are sequentially arranged along the extension direction of the signal line 120. Exemplarily, the signal line 120 extends along the first direction x, and the plurality of grooves 140 are sequentially arranged along the first direction x.

[0072] In one embodiment, in the bonding area BA, the orthographic projection of the groove 140 on the substrate 11 partially overlaps with the orthographic projection of the hollow portion Q on the substrate 11. Continuing with the above example, the hollow portion Q includes a first hollow portion Q1 and a second hollow portion Q2 that are spaced apart. The orthographic projection of the groove 140 on the substrate partially overlaps with the orthographic projection of the first hollow portion Q1 on the substrate 11, and the orthographic projection of the groove 140 on the substrate 11 overlaps with the second hollow portion Q2. Exemplarily, the orthographic projection of the main body sub-portion Q11 on the substrate 11 partially overlaps with the orthographic projection of the groove 140 on the substrate 11, the orthographic projection of the extension sub-portion Q12 on the substrate 11 at least partially overlaps with the orthographic projection of the groove 140 on the substrate 11, and the orthographic projection of the second hollow portion Q2 on the substrate 11 is located within the orthographic projection range of the groove 140 on the substrate 11.

[0073] Figure 7a The third embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown. Figure 7b for Figure 7a The cross-sectional structure diagram of the display panel along line N5N6 is shown. Figure 7a Shows Figure 1 FIG. 4 is an enlarged view of a local area S of the bonding area BA of the display panel. Figure 7a , Figure 7b The difference between the display panel shown in the figure and the display panel provided in any of the above embodiments is that Figure 5 Taking the display panel shown as an example, in this embodiment, the signal line 120 between the support structure 15 and the substrate 11 is a straight line.

[0074] For example, see Figure 7b The signal line 120 includes a plurality of repeating units, and the repeating unit includes a first conductive part ab, a second conductive part bc, a third conductive part cd, a fourth conductive part de and a fifth conductive part ef arranged along the extension direction of the signal line 120. The extension direction of the first conductive part ab, the third conductive part cd and the fifth conductive part ef is the same as the extension direction of the signal line 120. The extension directions of the second conductive part bc and the fourth conductive part de are opposite and both intersect with the extension direction of the signal line 120. The repeating unit also includes a sixth conductive part af, which is a straight line. Both ends of the sixth conductive part af are connected to a repeating unit respectively. The orthographic projection of the support structure 15 on the substrate 11 overlaps with the orthographic projection of the sixth conductive part af on the substrate 11. The support structure 15 is located between the first conductive pad 171 and the second conductive pad 172, and is used to support the area between the first conductive pad 171 and the second conductive pad 172 of the external circuit board in the process of bonding the external circuit board to the display panel, so as to avoid the external circuit board in the corresponding area from being sunken, affecting the alignment accuracy, and thus affecting the bonding yield.

[0075] Figure 8aThe fourth embodiment of the present application provides Figure 1 A partial enlarged view of the display panel is shown. Figure 8b for Figure 8a The cross-sectional structure diagram of the display panel along the N7N8 line is shown. Figure 8a Shows Figure 1 The figure shows an enlarged view of a local area S of the bonding area BA of the display panel.

[0076] like Figure 8a , Figure 8b The display panel and Figure 7a , Figure 7b The difference of the display panel shown is that, in this embodiment, the orthographic projection of the extension sub-portion Q12 on the substrate 11 and the orthographic projection of the groove 140 on the substrate 11 do not overlap, and the orthographic projection of the main sub-portion Q11 on the substrate 11 and the orthographic projection of the groove 140 on the substrate 11 partially overlap.

[0077] The structure of the display area AA of the display panel provided in any of the above embodiments may be the same. Fig. 9 An embodiment of the present application provides Figure 1 The cross-sectional structure diagram of the display panel along the N9N10 line is shown. Fig. 9 As shown, in this embodiment, the display panel includes a plurality of conductive layers 12, and the plurality of conductive layers 12 include a first conductive layer M1 and a second conductive layer M2 stacked. The first conductive layer M1 is located between the substrate 11 and the second conductive layer M2. The plurality of conductive layers 12 include a plurality of signal lines 120, and the plurality of signal lines 120 are alternately arranged in the first conductive layer M1 and the second conductive layer M2. Exemplarily, the material of the first conductive layer M1 and the second conductive layer M2 may be molybdenum.

[0078] In one embodiment, the plurality of conductive layers 12 further include a fourth conductive layer M3, a fifth conductive layer M4 and a sixth conductive layer M5 which are sequentially stacked on a side of the second conductive layer M2 away from the substrate 11. The fourth conductive layer M3, the fifth conductive layer M4 and the sixth conductive layer M5 may be a Ti / Al / Ti stacked structure.

[0079] like Fig. 9 As shown, the display panel further includes a planarization layer PLN, which is located in the display area AA and on the side of the pixel definition layer 13 close to the substrate 11. In one embodiment, the support structure 15 and the planarization layer PLN are in the same layer and made of the same material.

[0080] like Fig. 9 As shown, the display panel further includes an isolation structure 21 and a light emitting device 22 located in the display area AA. For example, the isolation structure 21 and the light emitting device 22 are both located on the side of the pixel definition layer 13 away from the substrate 11. The isolation structure 21 is located on one side of the substrate 11, and the isolation structure 21 encloses an isolation opening. At least part of the light emitting device 22 is located in the isolation opening.

[0081] The light-emitting device 22 may be an organic light-emitting diode (OLED), a micro light-emitting diode (Micro LED), a quantum dot light-emitting diode (QLED), etc. The light-emitting device 22 may be a light-emitting device of various colors, such as a red light-emitting device R, a green light-emitting device G, a blue light-emitting device B, etc.

[0082] The light-emitting device 22 includes a stacked first electrode Ad and a light-emitting layer Eml, wherein the first electrode Ad is located on the side of the light-emitting layer Eml close to the substrate 11. The isolation opening exposes a portion of the first electrode Ad, and the light-emitting layer Eml is located in the isolation opening. The light-emitting device 22 also includes a second electrode Cth, which is located on the side of the light-emitting layer Eml away from the substrate 11, and the second electrode Cth overlaps the isolation structure 21. Exemplarily, the first electrode Ad is an anode, and the second electrode Cth is a cathode. Exemplarily, the light-emitting device 22 may also include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer located between the anode and the light-emitting layer Eml, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer located between the cathode and the light-emitting layer Eml.

[0083] The isolation structure 21 has the function of isolating the film layer above it. In the present embodiment, the isolation structure 21 includes a first portion 211 and a second portion 212 stacked, the first portion 211 is located on the side of the second portion 212 close to the substrate 11, and the orthographic projection of the first portion 211 on the substrate 11 is located within the orthographic projection range of the second portion 212 on the substrate 11. In this case, the cross-sectional shape of the isolation structure 21 is an inverted trapezoid. Exemplarily, the first portion 211 can be designed as an independent film layer, that is, there is no physical interface inside the first portion 211, and each portion is composed of the same material. Alternatively, the first portion 211 can be designed to be composed of at least two film layers stacked. For example, the first portion 211 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum, respectively, and the conductive film layer composed of molybdenum is located between the substrate 11 and the conductive film layer composed of aluminum. The material of the second portion 212 can be an organic material, an inorganic material, or a metal material. In the case where the second portion 212 is a metal material, the material of the second portion 212 can be titanium. In one embodiment, the first portion 211 includes a conductive portion. For example, the first portion 211 is entirely a conductive structure, or a portion of the first portion 211 is a conductive structure.

[0084] Exemplarily, the cross-sectional shape of the isolation structure 21 may also be an inverted trapezoid. The isolation structure 21 may be an independent film layer, that is, there is no physical interface inside the isolation structure 21, and each part is made of the same material.

[0085] Exemplarily, the isolation structure 21 may further include a third portion 213, which is located on the side of the first portion 211 close to the substrate 11. The orthographic projection of the first portion 211 on the substrate 11 is located within the orthographic projection range of the third portion 213 on the substrate 11. Exemplarily, the cross-sectional shape of the isolation structure 21 is an I-shape. Exemplarily, the material of the third portion 213 may be molybdenum.

[0086] The composition, preparation, etc. of the isolation structure (also known as the partition structure) are further described in patent CN118251982A, patent 202410864269.8, patent PCT / CN2024 / 098407, patent PCT / CN2024 / 102783, patent PCT / CN2024 / 098217, patent PCT / CN2024 / 099419, and patent PCT / CN2024 / 099072, the contents of which are incorporated into this application by reference for reference.

[0087] The pixel definition layer 13 is located on a side of the isolation structure 21 close to the substrate 11 ; the pixel definition layer 13 encloses a pixel opening, the pixel opening is connected to the isolation opening, and the pixel opening exposes a portion of the first electrode Ad.

[0088] like Fig. 9 As shown, the display panel further includes an encapsulation structure 23, which is located on the side of the light emitting device 22 away from the substrate 11. The encapsulation structure 23 includes an encapsulation portion 231, and the orthographic projection of the encapsulation portion 231 on the substrate 11 covers the orthographic projection of the light emitting device 22 on the substrate 11. Exemplarily, the material of the encapsulation portion 231 is an inorganic material.

[0089] In one embodiment, the packaging portion 231 extends from the isolation opening to a side of the isolation structure 21 facing away from the substrate 11 .

[0090] In one embodiment, adjacent encapsulation portions 231 are disconnected at a side of the isolation structure 21 facing away from the substrate 11 .

[0091] In one embodiment, the encapsulation structure 23 further includes an organic encapsulation layer 232 located on a side of the encapsulation portion 231 and the isolation structure 21 away from the substrate 11 .

[0092] In one embodiment, the encapsulation structure 23 further includes an inorganic encapsulation layer 233 located on a side of the organic encapsulation layer 232 away from the substrate 11 , and the orthographic projection of the inorganic encapsulation layer 233 on the substrate 11 covers the orthographic projection of the organic encapsulation layer 232 on the substrate 11 .

[0093] Fig.10 Another embodiment of the present application provides Figure 1 The cross-sectional structure diagram of the display panel along the N9N10 line is shown. Fig.10 The display panel and Fig. 9 The difference between the display panels shown is that the conductive layer where the signal line 120 is located is located at a different position in the stacked structure of the display area AA.

[0094] Specifically, if Fig.10 As shown, at least one conductive layer in the display panel includes a third conductive layer M6, and the signal line 120 is located in the third conductive layer M6. The display panel also includes a semiconductor layer 24, which is located on the side of the third conductive layer M6 away from the substrate 11. Exemplarily, the material of the third conductive layer M6 includes molybdenum. Exemplarily, the material of the semiconductor layer includes at least one of amorphous silicon, polycrystalline silicon, and metal oxide.

[0095] In one embodiment, in the bonding area BA, the signal line 120 is a straight line. In this case, the orthographic projection of the hollow portion Q of the pixel definition layer 13 on the substrate 11 overlaps or does not overlap the orthographic projection of the signal line 120 on the substrate 11. Exemplarily, the orthographic projection of the hollow portion Q on the substrate 11 overlaps vertically with the orthographic projection of the signal line 120 on the substrate.

[0096] According to a second aspect of the present application, there is provided a display panel, including a display area AA and a bonding area BA located on one side of the display area AA: the display panel includes: a substrate 11; at least one conductive layer 12, located on one side of the substrate 11; at least one conductive layer 12 includes at least one signal line 120, and part of the signal line 120 is located in the bonding area BA; and a pixel definition layer 13, located on the side of the conductive layer 12 away from the substrate 11, the pixel definition layer 13 has at least one hollow portion Q, and the hollow portion Q is located in the bonding area BA; in the bonding area BA, the orthographic projection of the signal line 120 on the substrate 11 is located within the orthographic projection range of the pixel definition layer 13 on the substrate 11.

[0097] It should be noted that the display panel provided in this embodiment and the display panel provided in any of the above embodiments belong to the same inventive concept. The display panel provided in this embodiment is intended to protect the same inventive concept from different angles as the display panel provided in any of the above embodiments. The technical details not described in this embodiment can be referred to the above related embodiments, and will not be repeated here.

[0098] A third aspect of the present application provides a display device. Fig.11 This is a schematic diagram of the structure of a display device provided in one embodiment of the present application. Fig.11 As shown, the display device 10 includes a display panel provided by any of the above embodiments.

[0099] The display device 10 is a product with an image display function. For example, the display device 10 can be used to display static images, such as pictures or photos. The display device 10 can also be used to display dynamic images, such as videos.

[0100] The display device 10 can be a notebook computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0101] In addition, the display device 10 may also have functions such as taking pictures, recording, fingerprint recognition, face recognition, etc. Accordingly, the display device 10 also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0102] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0103] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a bonding area located on one side of the display area. The display panel comprises: substrate; at least one conductive layer, located on one side of the substrate; at least one of the conductive layers comprises at least one signal line, a portion of the signal line is located in the bonding area; and The pixel definition layer is located on the side of the conductive layer away from the substrate. The pixel definition layer has at least one hollow portion, which is located in the bonding area. The orthographic projection of the hollow portion on the substrate is located between the orthographic projections of at least part of the signal lines on the substrate.

2. The display panel according to claim 1, characterized in that: At least one of the signal lines includes a plurality of signal lines, and at least one of the hollow portions includes a first hollow portion, wherein an orthographic projection of the first hollow portion on the substrate is located between orthographic projections of adjacent signal lines on the substrate; Preferably, the first hollow portion includes a main body sub-portion, and the main body sub-portion and the signal line extend in the same direction; Preferably, the first hollow portion further comprises a plurality of extension sub-portions, the plurality of extension sub-portions are distributed on at least one side of the main body sub-portion, and the extension sub-portions are connected to the main body sub-portion; Preferably, the plurality of extension sub-portions are distributed on opposite sides of the main body sub-portion; Preferably, the first hollow portion is axially symmetrical, and the axis of symmetry is parallel to the extension direction of the signal line.

3. The display panel according to claim 1, characterized in that: At least one of the hollow portions includes a plurality of second hollow portions, and the orthographic projections of the plurality of second hollow portions on the substrate are distributed on both sides of the orthographic projection of at least one signal line on the substrate; Preferably, the extension direction of the second hollow portion intersects with the extension direction of the signal line; Preferably, the extension direction of the second hollow portion is perpendicular to the extension direction of the signal line; Preferably, on any side of at least one of the signal lines, a plurality of the second hollow portions are arranged in parallel along an extension direction of the signal line.

4. The display panel according to claim 1, characterized in that: In the bonding area, the signal line includes at least one repeating unit, and the repeating unit includes a first conductive portion, a second conductive portion, a third conductive portion, a fourth conductive portion, and a fifth conductive portion arranged along an extending direction of the signal line; Preferably, the extending directions of the first conductive portion, the third conductive portion and the fifth conductive portion are the same as the extending direction of the signal line, and the extending directions of the second conductive portion and the fourth conductive portion are opposite and both intersect with the extending direction of the signal line; Preferably, any one of the first conductive portion, the second conductive portion, the third conductive portion, the fourth conductive portion and the fifth conductive portion is a curve or a straight line; Preferably, the second conductive portion, the third conductive portion and the fourth conductive portion enclose a U-shaped structure, and the first conductive portion and the fifth conductive portion are respectively located on two sides of an opening of the U-shaped structure; Preferably, at least one of the repeating units includes a plurality of the repeating units, and the plurality of the repeating units are arranged in sequence along the extension direction of the signal line; Preferably, at least one of the signal lines comprises a plurality of signal lines; and in the bonding area, adjacent signal lines are axially symmetrical.

5. The display panel according to claim 1, characterized in that: In the bonding area, the signal line includes a straight line.

6. The display panel according to claim 1, characterized in that: It also includes a touch insulating layer, which is located on the side of the pixel definition layer away from the substrate; the touch insulating layer includes at least one groove, and the groove is located in the bonding area; Preferably, the groove penetrates the touch insulating layer along the thickness direction of the touch insulating layer; Preferably, the extending direction of the groove intersects with the extending direction of the signal line; Preferably, at least one of the grooves includes a plurality of grooves, and the plurality of grooves are arranged in sequence along the extension direction of the signal line.

7. The display panel according to claim 6, characterized in that: The orthographic projection of the groove on the substrate and the orthographic projection of the hollow portion on the substrate partially overlap; Preferably, at least one of the hollow portions comprises a first hollow portion, and an orthographic projection of the first hollow portion on the substrate is located between orthographic projections of adjacent signal lines on the substrate; The orthographic projection of the groove on the substrate partially overlaps with the orthographic projection of the first hollow portion on the substrate; Preferably, the first hollow portion includes a main body sub-portion and a plurality of extension sub-portions; the main body sub-portion and the signal line have the same extension direction, the plurality of extension sub-portions are distributed on at least one side of the main body sub-portion, and the extension sub-portion is connected to the main body sub-portion; the orthographic projection of the main body sub-portion on the substrate partially overlaps with the orthographic projection of the groove on the substrate, and the orthographic projection of the extension sub-portion on the substrate overlaps or does not overlap with the orthographic projection of the groove on the substrate; Preferably, the plurality of extension sub-portions are distributed on opposite sides of the main body sub-portion; Preferably, at least one of the hollow portions further comprises a plurality of second hollow portions, and the orthographic projections of the plurality of second hollow portions on the substrate are distributed on both sides of the orthographic projection of at least one of the signal lines on the substrate; The orthographic projection of the second hollow portion on the substrate and the orthographic projection of the groove on the substrate overlap or do not overlap.

8. The display panel according to claim 1, characterized in that: Also included is a support structure, located between the pixel definition layer and the signal line, wherein the orthographic projection of the support structure on the substrate partially overlaps with the orthographic projection of the signal line on the substrate; Preferably, the orthographic projection of the support structure and the orthographic projection of the central portion of the signal line on the substrate overlap; Preferably, the support structure is in a strip shape, and the extension direction of the support structure is perpendicular to the extension direction of the signal line; Preferably, the display panel further comprises a planarization layer located in the display area; the support structure and the planarization layer are in the same layer and made of the same material.

9. The display panel according to claim 8, characterized in that: The signal line between the support structure and the substrate is a straight line; Preferably, the signal line includes at least one repeating unit and a sixth conductive portion, and both ends of the sixth conductive portion are respectively connected to one of the repeating units; the orthographic projection of the sixth conductive portion on the substrate overlaps with the supporting structure, and the sixth conductive portion is a straight line.

10. The display panel according to claim 8, characterized in that: Also included is at least one insulating layer, at least a portion of which is located in the bonding area, and in the bonding area, the insulating layer is located between the signal line and the support structure.

11. The display panel according to claim 1, characterized in that: At least one of the conductive layers includes a first conductive layer and a second conductive layer stacked together; at least one of the signal lines includes a plurality of signal lines, and the plurality of signal lines are alternately arranged in the first conductive layer and the second conductive layer.

12. The display panel according to claim 1, characterized in that: At least one of the conductive layers includes a third conductive layer, and the signal line is located in the third conductive layer; Preferably, the display panel further comprises a semiconductor layer located on a side of the third conductive layer away from the substrate.

13. The display panel according to claim 1, characterized in that: The device also includes a first conductive pad and a second conductive pad located in the bonding area, wherein the first conductive pad is connected to a first end of the signal line, and the second conductive pad is connected to a second end of the signal line.

14. The display panel according to claim 1, characterized in that: It also includes an isolation structure and a light-emitting device located in the display area; the isolation structure is located on one side of the substrate, the isolation structure encloses an isolation opening, and at least a portion of the light-emitting device is located in the isolation opening; Preferably, the light emitting device comprises a stacked first electrode and a light emitting layer, wherein the first electrode is located on a side of the light emitting layer close to the substrate; the isolation opening exposes a portion of the first electrode, and the light emitting layer is located in the isolation opening; Preferably, the light-emitting device further comprises a second electrode located on a side of the light-emitting layer away from the substrate, and the second electrode overlaps the isolation structure.

15. The display panel according to claim 14, characterized in that: The isolation structure comprises a first portion and a second portion stacked together, wherein the first portion is located on a side of the second portion close to the substrate; an orthographic projection of the first portion on the substrate is located within the orthographic projection range of the second portion on the substrate; Preferably, the isolation structure further includes a third portion, which is located on a side of the first portion close to the substrate; the orthographic projection of the first portion on the substrate is located within the orthographic projection range of the third portion on the substrate; Preferably, the first portion includes a conductive portion.

16. The display panel according to claim 14, characterized in that: The pixel definition layer is located on a side of the isolation structure close to the substrate; the pixel definition layer encloses a pixel opening, the pixel opening is connected to the isolation opening, and the pixel opening exposes a portion of the first electrode.

17. The display panel according to any one of claims 13 to 16, characterized in that: It also includes a packaging structure, which is located on a side of the light-emitting device away from the substrate; the packaging structure includes a packaging part, and the orthographic projection of the packaging part on the substrate covers the orthographic projection of the light-emitting device on the substrate; Preferably, the packaging portion extends from the isolation opening to a side of the isolation structure away from the substrate; Preferably, adjacent packaging parts are disconnected at a side of the isolation structure away from the substrate; Preferably, the encapsulation structure further comprises an organic encapsulation layer, which is located on a side of the encapsulation portion and the isolation structure away from the substrate; Preferably, the encapsulation structure further comprises an inorganic encapsulation layer located on a side of the organic encapsulation layer away from the substrate, and an orthographic projection of the inorganic encapsulation layer on the substrate covers an orthographic projection of the organic encapsulation layer on the substrate.

18. A display panel, characterized in that: The display panel comprises a display area and a bonding area located on one side of the display area. The display panel comprises: substrate; at least one conductive layer, located on one side of the substrate; at least one of the conductive layers comprises at least one signal line, a portion of the signal line is located in the bonding area; and The pixel definition layer is located on the side of the conductive layer away from the substrate, and the pixel definition layer has at least one hollow portion, which is located in the bonding area; in the bonding area, the orthographic projection of the signal line on the substrate is located within the orthographic projection range of the pixel definition layer on the substrate.

19. A display device, characterized in that: A display panel comprising any one of claims 1-18.

Images