Display panel, preparation method thereof and display device
By providing a protruding portion on the driving circuit layer of the display panel, the first conductive member extends to the side wall, the problem of deviation between the first electrode and the first conductive member is solved, and the yield and display effect of the display panel are improved .
Patent Information
- Application Number
- CN202411347616.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-01-03
AI Technical Summary
The connection between the first electrode and the first conductive member in the existing display panel is prone to bias, resulting in signal transmission failure and light-emitting element failure, which is manifested as dark spots, affecting the display effect and yield.
A projection is provided in the driving circuit layer of the display panel, and the first conductive member extends from the side of the first flat layer away from the substrate to the side wall of the projection, and is electrically connected to the first electrode of the light emitting element to ensure that Connection can still be achieved in biased situations.
By increasing the connection range of the conductive parts, the yield and display effect of the display panel are improved, and the stable connection between the first electrode and the first conductive part is ensured, and the dark spot problem is avoided.
Smart Images
Figure CN119255647A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art
[0002] In current display technology, the first electrode in the light-emitting element is connected to the first conductive member in the driving circuit layer, thereby realizing the light-emitting control of the light-emitting element. In the prior art, due to the displacement of the first electrode, it is impossible to connect to the first conductive member, the first electrode is broken or warped, and the signal transmission to the light-emitting element cannot be realized, the light-emitting element fails, and it appears as a dark spot in the subsequent lighting test.
[0003] In order to improve the yield rate and display effect of the display panel, it is urgent to improve the display panel. Summary of the invention
[0004] The present application mainly provides a display panel and a manufacturing method thereof and a display device, which can improve the yield and display effect of the display panel.
[0005] In order to solve the above technical problems, the technical solution adopted in the present application is: to provide a display panel, which includes a substrate, a driving circuit layer and a light-emitting element, wherein the driving circuit layer is arranged on one side of the substrate, including a first flat layer and a first conductive member arranged on the side of the first flat layer away from the substrate, a protrusion is arranged on the surface of the first flat layer away from the substrate, and the first conductive member extends from the surface of the first flat layer away from the substrate to at least the side wall of the protrusion; the light-emitting element is arranged on the side of the driving circuit layer away from the substrate, and the light-emitting element includes a first electrode electrically connected to the first conductive member.
[0006] The material of the protruding portion is the same as that of the first flat layer.
[0007] Preferably, the raised portion is integrally formed with the first flat layer.
[0008] Preferably, the material of the first planar layer includes at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin or polyimide resin.
[0009] Therein, the width of the protrusion decreases in a direction away from the substrate.
[0010] Preferably, the cross section of the protrusion perpendicular to the substrate is a regular trapezoid.
[0011] The first conductive element further extends to a surface of the protrusion facing away from the substrate.
[0012] The driving circuit layer further includes a second conductive member, which is arranged on the side of the first flat layer facing the substrate, wherein the first flat layer is provided with a first via hole, and the first conductive member extends into the first via hole and is electrically connected to the second conductive member.
[0013] There are a plurality of protrusions, which are arranged at intervals, and the first conductive member extends from a surface of the first flat layer facing away from the substrate to at least the sidewall of each protrusion;
[0014] Wherein, the first electrode is an anode.
[0015] In order to solve the above technical problem, another technical solution adopted by the present application is: to provide a display device, which includes the display panel described in the above embodiment.
[0016] In order to solve the above technical problems, another technical solution adopted in the present application is: a method for preparing a display panel is provided, the preparation method comprising: forming a driving circuit layer on one side of a substrate, the driving circuit layer comprising a first flat layer and a first conductive member arranged on a side of the first flat layer away from the substrate, a protrusion is arranged on the surface of the first flat layer on the side away from the substrate, and the first conductive member extends from the surface of the first flat layer on the side away from the substrate to at least the side wall of the protrusion; forming a light-emitting element on the side of the driving circuit layer away from the substrate, the light-emitting element comprising a first electrode electrically connected to the first conductive member.
[0017] Among them, the step of forming a driving circuit layer on one side of the substrate includes: forming a first material layer on one side of the substrate; patterning the first material layer using a mask plate to obtain a first flat layer and a raised portion, wherein the mask plate is a halftone mask plate, including a first area corresponding to the raised portion and a second area arranged outside the first area, wherein the transmittance of the second area is greater than the transmittance of the first area.
[0018] Preferably, the light transmittance of the first region is zero.
[0019] Preferably, the first planar layer is provided with a first via hole, the first conductive member extends into the first via hole, and the mask further includes a third region corresponding to the first via hole, wherein the transmittance of the third region is greater than the transmittance of the second region.
[0020] The beneficial effects of the present application are as follows: in the present application, a protrusion is provided on the surface of the first flat layer on the side facing away from the substrate, and the first conductive member extends from the surface of the first flat layer on the side facing away from the substrate at least to the side wall of the protrusion, thereby increasing the connection range between the first electrode and the first conductive member, and when the first electrode is offset, the first electrode and the first conductive member can also be connected, thereby improving the yield and display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:
[0022] Figure 1 This is a schematic structural diagram of an embodiment of a display panel in the present application;
[0023] Figure 2 It is a structural schematic diagram of another embodiment of the display panel in the present application;
[0024] Figure 3 It is a structural schematic diagram of another embodiment of the display panel in the present application;
[0025] Figure 4 It is a schematic diagram of a flow chart of an implementation method of a display panel manufacturing method in this application;
[0026] Figure 5 for Figure 4 A schematic flow chart of an implementation method of step S10;
[0027] Figure 6 for Figure 5 FIG. 1 is a schematic structural diagram of an implementation method of step S12 in FIG.
[0028] Explanation of the reference numerals: 10 display panel; 20 substrate; 30 driving circuit layer; 31 first flat layer; 32 first conductive member; 33 protrusion; 34 side wall; 35 second conductive member; 36 first via hole; 41 first electrode; 50 mask plate; 51 first region; 52 second region; 53 third region. DETAILED DESCRIPTION
[0029] 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.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0034] See also Figure 1 and Figure 2 The present application provides a display panel 10, which includes a substrate 20, a driving circuit layer 30 and a light-emitting element, wherein the driving circuit layer 30 is arranged on one side of the substrate 20, including a first flat layer 31 and a first conductive member 32 arranged on the side of the first flat layer 31 away from the substrate 20, a protrusion 33 is arranged on the surface of the first flat layer 31 away from the substrate 20, and the first conductive member 32 extends from the surface of the first flat layer 31 away from the substrate 20 at least to the side wall 34 of the protrusion 33; the light-emitting element is arranged on the side of the driving circuit layer 30 away from the substrate 20, and the light-emitting element includes a first electrode 41 electrically connected to the first conductive member 32.
[0035] Specifically, the substrate 20 plays a supporting role in the display panel 10, and it can be a flexible substrate or a rigid substrate. When the substrate 20 is a flexible substrate, its material can be polyimide (PI), and when the substrate 20 is a rigid substrate, its material can be glass or metal. The present application does not limit the structure of the substrate 20.
[0036] The driving circuit layer 30 and the light emitting element are arranged on the same side of the substrate 20, and the driving circuit layer 30 is used to drive the light emitting element to emit light. The number of light emitting elements can be one or more, and the light color of the light emitting element can be red, green or blue, which is not limited here.
[0037] The driving circuit layer 30 includes a first flat layer 31 and a first conductive member 32. The first flat layer 31 is located between the first conductive member 32 and the substrate 20. The first flat layer 31 is used to ensure the flatness of the display panel 10. The first conductive member 32 is electrically connected to the first electrode 41 of the light-emitting element, thereby realizing the electrical connection between the driving circuit layer 30 and the light-emitting element, so that the driving circuit layer 30 can drive the light-emitting element.
[0038] At the same time, a protrusion 33 is arranged on the surface of the first flat layer 31 on the side facing away from the substrate 20, and the first conductive member 32 extends from the surface of the first flat layer 31 on the side facing away from the substrate 20 at least to the side wall 34 of the protrusion 33. That is to say, the surface of the first flat layer on the side facing away from the substrate is not a plane, which ensures the plane portion and the protrusion 33. The first conductive member 32 is partially arranged on the plane portion and partially arranged on the side wall 34 of the protrusion 33.
[0039] In the prior art, the surface of the first flat layer 31 facing away from the substrate 20 is flat, and no protrusion 33 is provided. At the same time, the preparation process is: firstly, the first flat layer 31 is formed, and then the first conductive member 32 is formed on the side of the first flat layer 31 facing away from the substrate 20, and then the first electrode 41 of the light-emitting element is formed. When the first electrode 41 is formed, it is easy for the first electrode 41 to be offset, so that the first electrode 41 cannot be electrically connected to the first conductive member 32, and then the driving circuit layer 30 cannot drive the light-emitting element.
[0040] In the present application, a protrusion 33 is provided on the surface of the first flat layer 31 on the side facing away from the substrate 20, and the first conductive member 32 extends from the surface of the first flat layer 31 on the side facing away from the substrate 20 at least to the side wall 34 of the protrusion 33, thereby increasing the extension space of the first conductive member 32, so that the protrusion 33 can intercept the displaced first electrode 41, and even if the first electrode 41 is displaced, the first electrode 41 and the first conductive member 32 can be connected, thereby improving the yield and display effect of the display panel 10.
[0041] Please continue reading Figure 1 The material of the protrusion 33 is the same as that of the first flat layer 31. During preparation, the protrusion 33 and the first flat layer 31 can be prepared using the same material to reduce costs and improve preparation efficiency. Of course, in other embodiments, the material of the protrusion 33 can be different from that of the first flat layer 31. A suitable material can be selected to prepare the protrusion 33.
[0042] In one embodiment, the protrusion 33 is integrally formed with the first flat layer 31. Specifically, the protrusion 33 and the first flat layer 31 are simultaneously manufactured by the same manufacturing process, so that the protrusion 33 and the first flat layer 31 have good bonding and a stable structure. Figure 2 As shown, the protrusion 33 and the first flat layer 31 can also be prepared separately and in sequence. In this case, the protrusion 33 and the first flat layer 31 are two independent structures.
[0043] In one embodiment, the material of the first planar layer 31 includes at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin or polyimide resin. Specifically, the material of the first planar layer 31 includes organic material, and the design of the first planar layer 31 can improve the planarity of the driving circuit layer 30.
[0044] Please continue reading Figure 1 In the direction away from the substrate 20 , the width of the protrusion 33 is reduced, thereby reducing the difficulty of extending the first conductive member 32 to the side wall 34 of the protrusion 33 during preparation, thereby ensuring the climbing effect of the first conductive member 32 .
[0045] In one embodiment, if Figure 1 As shown, the cross section of the protrusion 33 perpendicular to the substrate 20 is a regular trapezoid. Specifically, the cross section of the protrusion 33 perpendicular to the substrate 20 can be an isosceles trapezoid or a right-angled trapezoid, which is convenient for the subsequent arrangement of the first conductive member 32, and the combination stability of the first conductive member 32 and the protrusion 33 is strong.
[0046] In one embodiment, the first conductive member 32 further extends to the surface of the protrusion 33 facing away from the substrate 20. Specifically, the provision of the protrusion 33 increases the extension length of the first conductive member 32. When the first conductive member 32 covers at least a portion of the surface of the protrusion 33 facing away from the substrate 20, the connection area between the first conductive member 32 and the first electrode 41 is increased, so that when the first electrode 41 is misaligned, the electrical connection effect between the first conductive member 32 and the first electrode 41 can be ensured.
[0047] Of course, in other embodiments, the first conductive member 32 may also be disposed only on the side wall 34 of the protrusion 33 .
[0048] Please continue reading Figure 2 The driving circuit layer 30 further includes a second conductive member 35, which is disposed on the side of the first flat layer 31 facing the substrate 20, wherein the first flat layer 31 is provided with a first via hole 36, and the first conductive member 32 extends into the first via hole 36 and is electrically connected to the second conductive member 35. Specifically, the second conductive member 35 is disposed between the substrate 20 and the first flat layer 31, and the first conductive member 32 passes through the first via hole 36 and is connected to the second conductive member 35 to achieve electrical signal conduction.
[0049] See also Figure 3 , there are a plurality of protrusions 33, the plurality of protrusions 33 are arranged at intervals, and the first conductive member 32 extends from the surface of the first flat layer 31 on the side away from the substrate 20 to at least the side wall 34 of each protrusion 33. Specifically, the plurality of protrusions 33 are arranged at intervals, and the first conductive member 32 extends from the surface of the first flat layer 31 on the side away from the substrate 20 to at least the side wall 34 of each protrusion 33, so that the extension length of the first conductive member 32 increases, and after the first electrode 41 is offset in the extension direction, the arrangement of the first conductive member 32 can achieve electrical connection with the first electrode 41 to the maximum extent.
[0050] The number of the protrusions 33 may be two, three or more, so as to ensure electrical connection between the first conductive member 32 and the first electrode 41 .
[0051] In one embodiment, the first electrode 41 is an anode. In other embodiments, the first electrode may also be a cathode.
[0052] The present application also provides a display device, which includes the display panel 10 described in the above embodiment. The display device in the embodiment of the present invention can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame or navigator.
[0053] See also Figure 4 , Figure 5 and Figure 6 The present application also provides a method for preparing a display panel 10, the method comprising:
[0054] S10: A driving circuit layer 30 is formed on one side of the substrate 20, wherein the driving circuit layer 30 includes a first flat layer 31 and a first conductive member 32 arranged on the side of the first flat layer 31 facing away from the substrate 20, a protrusion 33 is arranged on the surface of the first flat layer 31 facing away from the substrate 20, and the first conductive member 32 extends from the surface of the first flat layer 31 facing away from the substrate 20 at least to the side wall 34 of the protrusion 33.
[0055] Specifically, a driving circuit layer 30 is formed on one side of the substrate 20. When preparing the driving circuit layer 30, a first flat layer 31 and a first conductive member 32 are sequentially prepared. At the same time, a protrusion 33 is provided on the surface of the first flat layer 31 on the side away from the substrate 20, and the first conductive member 32 extends from the surface of the first flat layer 31 on the side away from the substrate 20 to at least the side wall 34 of the protrusion 33.
[0056] In one implementation, step S10 specifically includes:
[0057] S11: forming a first material layer on one side of the substrate 20 .
[0058] A first material layer is formed on the entire surface of one side of the substrate 20 .
[0059] S12: Use a mask plate 50 to pattern the first material layer to obtain a first flat layer 31 and a raised portion 33, wherein the mask plate 50 is a halftone mask plate, including a first area 51 corresponding to the raised portion 33 and a second area 52 arranged outside the first area 51, wherein the transmittance of the second area 52 is greater than the transmittance of the first area 51.
[0060] Specifically, the first material layer is patterned using a mask plate 50 to obtain the first flat layer 31 and the protrusion 33. The mask plate 50 is a halftone mask plate, which includes a first area 51 corresponding to the protrusion 33 and a second area 52 arranged outside the first area 51, wherein the transmittance of the second area 52 is greater than the transmittance of the first area 51, so that during the patterning process, more light passes through the second area 52 than the light passes through the first area 51, so that after patterning, the thickness of the first material layer at the position corresponding to the second area 52 is greater than the thickness at the position corresponding to the first area 51, thereby obtaining the protrusion 33 corresponding to the first area 51.
[0061] In one embodiment, the light transmittance of the first region 51 is zero, that is, during the patterning process, light will not pass through the first region 51 .
[0062] In other embodiments, the transmittance of the first area 51 may not be zero. In this case, both the first area 51 and the second area 52 can allow light to pass through, but the light allowed to pass through the first area 51 is less than the light allowed to pass through the second area 52. In short, it is sufficient to ensure that the transmittance of the second area 52 is greater than the transmittance of the first area 51.
[0063] In one embodiment, the first planar layer 31 is provided with a first via hole 36, the first conductive member 32 extends into the first via hole 36, and the mask plate 50 further includes a third region 53 corresponding to the first via hole 36, wherein the transmittance of the third region 53 is greater than the transmittance of the second region 52. Specifically, the transmittance of the third region 53 is greater than the transmittance of the second region 52, so that after the patterning process, the etching depth of the third region 53 is greater than the etching depth of the second region 52, thereby obtaining the first via hole 36 corresponding to the third region 53.
[0064] By disposing the mask plate 50 in the above embodiment, the first flat layer 31 and the protruding portion 33 can be prepared simultaneously in one process without increasing the process flow.
[0065] S20 : forming a light-emitting element on the side of the driving circuit layer 30 facing away from the substrate 20 , wherein the light-emitting element includes a first electrode 41 electrically connected to the first conductive member 32 .
[0066] The light emitting element is located on a side of the driving circuit layer 30 away from the substrate 20 , wherein the light emitting element includes a first electrode 41 connected to the first conductive member 32 .
[0067] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A display panel, characterized in that: include: substrate; a driving circuit layer, arranged on one side of the substrate, comprising a first flat layer and a first conductive member arranged on a side of the first flat layer away from the substrate, a protrusion being arranged on a surface of the first flat layer away from the substrate, and the first conductive member extending from the surface of the first flat layer away from the substrate to at least a side wall of the protrusion; The light emitting element is arranged on a side of the driving circuit layer away from the substrate, and the light emitting element comprises a first electrode electrically connected to the first conductive member.
2. The display panel according to claim 1, characterized in that: The material of the protrusion is the same as that of the first flat layer; Preferably, the protrusion is integrally formed with the first flat layer; Preferably, the material of the first planar layer includes at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin or polyimide resin.
3. The display panel according to claim 1, characterized in that: The width of the protrusion decreases in a direction away from the substrate; Preferably, a cross section of the protrusion perpendicular to the substrate is a right trapezoid.
4. The display panel according to claim 1, characterized in that: The first conductive element further extends to a surface of the protrusion facing away from the substrate.
5. The display panel according to claim 1, characterized in that: The driving circuit layer further comprises: The second conductive member is arranged on the side of the first flat layer facing the substrate, wherein the first flat layer is provided with a first via hole, and the first conductive member extends into the first via hole and is electrically connected to the second conductive member.
6. The display panel according to claim 1, characterized in that: There are a plurality of protrusions, which are arranged at intervals, and the first conductive member extends from a surface of the first flat layer away from the substrate at least to a side wall of each protrusion.
7. The display panel according to claim 1, characterized in that: The first electrode is an anode.
8. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 7.
9. A method for preparing a display panel, characterized in that: The preparation method comprises: A driving circuit layer is formed on one side of the substrate, the driving circuit layer comprising a first flat layer and a first conductive member arranged on a side of the first flat layer away from the substrate, a protrusion is arranged on a surface of the first flat layer away from the substrate, and the first conductive member extends from the surface of the first flat layer away from the substrate to at least a side wall of the protrusion; A light emitting element is formed on a side of the driving circuit layer away from the substrate, and the light emitting element includes a first electrode electrically connected to the first conductive member.
10. The preparation method according to claim 9, characterized in that: The step of forming a driving circuit layer on one side of the substrate includes: forming a first material layer on one side of the substrate; Using a mask plate to pattern the first material layer to obtain the first flat layer and the protruding portion, wherein the mask plate is a half-tone mask plate, including a first area corresponding to the protruding portion and a second area arranged outside the first area, wherein the transmittance of the second area is greater than the transmittance of the first area; Preferably, the light transmittance of the first region is zero; Preferably, the first planar layer is provided with a first via hole, the first conductive member extends into the first via hole, and the mask plate further includes a third region corresponding to the first via hole, wherein the transmittance of the third region is greater than the transmittance of the second region.