Display panel

Abstract

The present application discloses a display panel comprising a first thin-film transistor, a first power connection line, and a light-emitting device. The first thin-film transistor comprises a first input terminal and a first output terminal. The first power connection line is connected to the first input terminal. The first power connection line comprises a first wire body and a first repair portion disposed on the same layer as and connected to the first wire body. The first repair portion is the portion to be cut, and the thickness of the first repair portion is less than the thickness of the first wire body. The light-emitting device comprises an input electrode connected to the first output terminal. The present application thins the first repair portion of the first power connection line so that the thickness of the first repair portion is less than the thickness of the first wire body. Consequently, during laser repair, the first repair portion can be cut using a lower-energy laser.

Description

Technical Field

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

[0002] Large-scale, high-resolution displays place stringent demands on panel wiring design, ensuring both a sufficiently high aperture ratio and resolution while also considering repair design to improve panel yield. In existing mass-produced structures, the high energy required for laser cutting repairs requires space for repairs, sacrificing a certain amount of aperture ratio. Summary of the Invention

[0003] An embodiment of the present application provides a display panel that can reduce laser cutting energy during repair.

[0004] An embodiment of the present application provides a display panel, comprising:

[0005] a first thin film transistor, wherein the first thin film transistor includes a first input terminal and a first output terminal;

[0006] a first power connection line, connected to the first input end, comprising a first wire body and a first repair portion provided on the same layer as and connected to the first wire body, the first repair portion being a cut portion, and having a thickness less than that of the first wire body;

[0007] A light emitting device includes an input electrode connected to the first output terminal.

[0008] Optionally, in some embodiments of the present application, the first repair portion is arranged to overlap with the input electrode.

[0009] Optionally, in some embodiments of the present application, at least a portion of the first wire body is arranged to overlap with the input electrode.

[0010] Optionally, in some embodiments of the present application, the display panel includes a substrate and a light shielding layer, a buffer layer, an active layer, a first insulating layer, a first metal layer, a second insulating layer, a second metal layer, a passivation layer, and a planar layer sequentially arranged on the substrate, and the input electrode is arranged on the planar layer;

[0011] The light shielding layer includes a light shielding portion, the light shielding portion is overlapped with the active layer, the active layer includes a first active portion, the first metal layer includes a first gate electrode, the second metal layer includes a first source electrode and a first drain electrode, and the first active portion, the first gate electrode, the first source electrode, and the first drain electrode form the first thin film transistor;

[0012] One of the first source and the first drain is the first input terminal, and the other of the first source and the first drain is the first output terminal.

[0013] Optionally, in some embodiments of the present application, the first power connection line and the light-shielding portion are arranged on the same layer.

[0014] Optionally, in some embodiments of the present application, the first power connection line and the first gate are arranged on the same layer.

[0015] Optionally, in some embodiments of the present application, the first power connection line and the first source are arranged in the same layer.

[0016] Optionally, in some embodiments of the present application, a first power connection line includes a first line body and two first repairing parts; the first power connection line is located on one side of the first thin film transistor;

[0017] The first repairing portion is connected to the first thin film transistor, and an extending direction of the first wire body intersects with an extending direction of the first repairing portion;

[0018] Another first repairing portion is connected to another first thin film transistor, and an extending direction of the first line body is the same as an extending direction of the other first repairing portion.

[0019] Optionally, in some embodiments of the present application, the display panel further includes:

[0020] a second thin film transistor, the second thin film transistor comprising a second input terminal and a second output terminal; the second output terminal is connected to the input electrode;

[0021] A second power connection line, the second power connection line is connected to the second input end, the second power connection line includes a second wire body and a second repair part that is arranged on the same layer and connected to the second wire body, the second repair part is the cut part, and the thickness of the second repair part is less than the thickness of the second wire body.

[0022] Optionally, in some embodiments of the present application, the second power connection line and the first power connection line are arranged on the same layer.

[0023] The display panel of the embodiment of the present application includes a first thin film transistor, a first power connection line and a light-emitting device, the first thin film transistor includes a first input end and a first output end; the first power connection line is connected to the first input end, the first power connection line includes a first wire body and a first repair part that is arranged in the same layer as and connected to the first wire body, the first repair part is a cut part, and the thickness of the first repair part is less than the thickness of the first wire body; the light-emitting device includes an input electrode, and the input electrode is connected to the first output end.

[0024] Among them, the present application thins the first repair portion of the first power connection line so that the thickness of the first repair portion is smaller than the thickness of the first wire body, and then when performing laser repair, a lower energy laser can be used to cut off the first repair portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a schematic diagram of a top view of the display panel provided in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of a first cross-sectional structure of a display panel provided in an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a second cross-sectional structure of a display panel provided in an embodiment of the present application;

[0029] Figure 4 2 is a schematic diagram of a third cross-sectional structure of a display panel provided in an embodiment of the present application;

[0030] Figure 5 is an equivalent circuit diagram of the display panel provided in an embodiment of the present application;

[0031] Figure 6 1 is a schematic structural diagram of step B1 in the method for manufacturing a display panel provided in an embodiment of the present application;

[0032] Figure 7 2 is a schematic structural diagram of step B2 in the method for manufacturing a display panel provided in an embodiment of the present application;

[0033] Figure 8 1 is a schematic structural diagram of step B3 in the method for manufacturing a display panel provided in an embodiment of the present application;

[0034] Figure 9 It is a structural schematic diagram of step B4 in the method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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 those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0036] The present application provides a display panel, which is described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments.

[0037] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a display panel 100 , which includes a first thin film transistor T1 , a first power connection line V1 and a light emitting device Fg.

[0038] The first thin film transistor T1 includes a first input terminal and a first output terminal.

[0039] The first power connection line V1 is connected to the first input terminal. The first power connection line V1 includes a first wire body v11 and a first repair portion v12 disposed on the same layer as and connected to the first wire body v11. The thickness of the first repair portion v12 is less than that of the first wire body.

[0040] The light emitting device Fg includes an input electrode f1 , which is connected to the first output terminal.

[0041] In particular, the embodiment of the present application thins the first repair portion v12 of the first power connection line V1 so that the thickness of the first repair portion v12 is smaller than the thickness of the first wire body v11. Therefore, during laser repair, a lower energy laser can be used to cut off the first repair portion v12.

[0042] That is, the first repair portion v12 is cut by laser during repair. In the display panel 100 of this embodiment, by setting the first repair portion v12 thinner than the first linear body v11, it is easy to cut the first repair portion v12 by laser, thereby saving laser energy.

[0043] Optionally, the first repair portion v12 is overlapped with the input electrode f1 to increase the aperture ratio.

[0044] Optionally, in some embodiments of the present application, at least a portion of the first linear body v11 is arranged to overlap with the input electrode f. Such an arrangement can further improve the aperture ratio of the display panel 100.

[0045] Optionally, in this embodiment, a portion of the first wire body v11 is arranged to overlap with the input electrode f1.

[0046] Optionally, the light emitting device Fg further includes a light emitting layer f2 and an output electrode f3 disposed on the input electrode f1. Optionally, the input electrode f1 is an anode, and the output electrode f3 is a cathode.

[0047] In some embodiments, the light emitting device Fg may also be a micro light emitting diode (Micro-LED) or a sub-millimeter light emitting diode (Mini-LED), and the input electrode f1 is a pad electrode.

[0048] It should be noted that the thin film transistors in the display panel 100 of the present application can be top-gate, bottom-gate or dual-gate thin film transistors. The display panel 100 of this embodiment is described using top-gate thin film transistors as an example, but is not limited thereto.

[0049] Optionally, the display panel 100 includes a substrate 11 and a light shielding layer 12, a buffer layer 13, an active layer 14, a first insulating layer 15, a first metal layer 16, a second insulating layer 17, a second metal layer 18, a passivation layer 19, and a planar layer 20 sequentially disposed on the substrate 11. The input electrode f1 is disposed on the planar layer 20.

[0050] The light shielding layer 12 includes a light shielding portion 121. The light shielding portion 121 overlaps the active layer 14. The active layer 14 includes a first active portion 141. The first metal layer 16 includes a first gate electrode 161. The second metal layer 18 includes a first source electrode 181 and a first drain electrode 182. The first active portion 141, the first gate electrode 161, the first source electrode 181, and the first drain electrode 182 form a first thin film transistor T1.

[0051] One of the first source 181 and the first drain 182 is a first input terminal, and the other of the first source 181 and the first drain 182 is a first output terminal.

[0052] Optionally, the first power connection line V1 and the first source electrode 181 are disposed in the same layer. Placing the first power connection line V1 in the second metal layer 18 reduces the depth of the first power connection line V1 in the display panel 100. Therefore, when repairing the display panel 100, the energy required to laser cut the first repair portion v12 can be reduced.

[0053] In some embodiments, as Figure 3As shown, the first power connection line V1 and the light shielding portion 121 are provided in the same layer. That is, the first power connection line V1 is formed in the light shielding layer 12 .

[0054] In some embodiments, as Figure 4 As shown, the first power connection line V1 and the first gate 161 are disposed in the same layer, that is, the first power connection line V1 is formed in the first metal layer 16 .

[0055] Optional, such as Figure 1 As shown, a first power connection line V1 includes a first line body v11 and two first repairing portions v12. The first power connection line V1 is located on one side of the first thin film transistor T1.

[0056] A first repairing portion v12 is connected to a first thin film transistor T1. An extending direction of the first line v11 intersects with an extending direction of the first repairing portion v12.

[0057] Another first repairing portion v12 is connected to another first thin film transistor T1 . The extending direction of the first line body v11 is the same as the extending direction of the other first repairing portion v12 .

[0058] This embodiment uses a first wire v11 to connect two first repair parts v12, and the extension directions of the two first repair parts v12 are different. Therefore, when repairing, if any one of the first repair parts v12 is cut off, the other first repair part v12 can continue to work without affecting the operation of other light-emitting devices Fg.

[0059] Optionally, the extension direction of a first repair portion v12 may be perpendicular to the extension direction of the first wire body v11.

[0060] In some embodiments, the extending directions of the two first repair portions v12 may also be different from the extending direction of the first linear body v11. For example, the extending direction of the first repair portion v12 is perpendicular to the extending direction of the first linear body v11.

[0061] Please refer to Figure 1 Optionally, the display panel 100 further includes a second thin film transistor T2 and a second power connection line V2.

[0062] The second thin film transistor T2 includes a second input terminal and a second output terminal. The second output terminal is connected to the input electrode f1.

[0063] The second power connection line V2 is connected to the second input terminal. The second power connection line V2 includes a second wire body v21 and a second repair portion v22 disposed on the same layer as and connected to the second wire body v21. The thickness of the second repair portion v22 is less than that of the second wire body v21.

[0064] In particular, the embodiment of the present application thins the second repair portion v22 of the second power connection line V2 so that the thickness of the second repair portion v22 is smaller than the thickness of the second wire body v21. Therefore, during laser repair, a lower energy laser can be used to cut off the second repair portion v22.

[0065] That is, the second repair portion v22 is cut by laser during repair. The display panel 100 of this embodiment facilitates laser cutting of the second repair portion v22 by setting the second repair portion v22 thinner than the second wire body v21, thereby saving laser energy.

[0066] Optionally, the second power connection line V2 and the first power connection line V1 are arranged on the same layer, which can save a photomask process.

[0067] Optionally, the active layer 14 includes a second active portion. The first metal layer 16 includes a second gate. The second metal layer 18 includes a second source electrode and a second drain electrode. The second active portion, the second gate electrode, the second source electrode, and the second drain electrode form a second thin film transistor T2.

[0068] One of the second source and the second drain is a second input terminal, and the other of the second source and the second drain is a second output terminal.

[0069] Please refer to Figure 5 It should be noted that, in the present application, one of the first thin film transistor T1 and the second thin film transistor T2 is a driving thin film transistor. This embodiment uses the first thin film transistor T1 as the driving thin film transistor, and uses the first drain electrode 182 and the second drain electrode 182 as input terminals of the thin film transistor as an example for description, but the present invention is not limited thereto.

[0070] The display panel 100 of this embodiment further includes a data line Date, a third thin film transistor T3 and a capacitor C.

[0071] A gate of the third thin film transistor T3 is connected to the first control line WR, a drain of the third thin film transistor T3 is connected to the data line Date, and a source of the third thin film transistor T3 is connected to the node G.

[0072] The first gate electrode 161 of the first thin film transistor T1 is connected to the node G, the first drain electrode 182 of the first thin film transistor T1 is connected to the first power connection line V1, and the first source electrode 181 of the first thin film transistor T1 is connected to the input electrode f1 of the light emitting device Fg.

[0073] A second gate of the second thin film transistor T2 is connected to the second control line RD, a second drain of the second thin film transistor T2 is connected to the second power connection line V2, and a second source of the second thin film transistor T2 is connected to the input electrode f1 of the light emitting device Fg.

[0074] One end of the capacitor C is connected to the node G, and the other end of the capacitor is connected to the input electrode f1 of the light emitting device Fg.

[0075] The method for manufacturing the display panel 100 according to the embodiment of the present application includes the following steps:

[0076] Please refer to Figure 6 Step B1: forming a light shielding layer 12 , a buffer layer 13 , an active layer 14 , a first insulating layer 15 , a first metal layer 16 and a second insulating layer 17 on the substrate 11 in sequence.

[0077] Please refer to Figure 7 Step B2: forming a second metal layer 18 on the second insulating layer 17. The metal layer 18 includes a first source electrode 181, a first drain electrode 182, a first power connection line V1 and a second circuit connection line.

[0078] Step B2 includes the following steps:

[0079] Step B21, forming a metal material layer Js on the second insulating layer 17;

[0080] Step B22: Form a photoresist layer Gk on the metal material layer Js and perform a first patterning process on the photoresist layer Gk to form a first portion g1, a second portion g2, and a third portion g3. The first portion g1 covers the area of ​​the metal material layer Js corresponding to the source and drain electrodes to be formed. The second portion g2 is connected to the third portion g3. The second portion g2 corresponds to the first line v11 to be formed, and the third portion g3 corresponds to the first repair portion v12 to be formed. The thickness of the second portion g2 is greater than that of the third portion g3.

[0081] Optionally, a halftone mask or a grayscale mask is used to perform a first patterning process on the photoresist layer Gk.

[0082] Step B23: thinning the photoresist layer Gk and the exposed metal material layer Js, and removing the third portion g3.

[0083] Step B24: Using the thinned photoresist layer Gk as a barrier, further etching the thinned metal material layer Js to form a second metal layer 18, and then removing the photoresist layer Gk. This forms the first source electrode 181, the first drain electrode 182, the first power connection line V1, and the second circuit connection line. The second thinning process forms the first repaired portion v12 of the first power connection line V1.

[0084] Please refer to Figure 8 , step B3: forming a passivation layer 19 and a planarization layer 20 on the second metal layer 18 .

[0085] Please refer to Figure 9 , step B4: forming a light emitting device Fg on the planar layer 20 .

[0086] This completes the manufacturing process of the display panel 100 of this embodiment.

[0087] The display panel of the embodiment of the present application includes a first thin film transistor, a first power connection line and a light-emitting device, the first thin film transistor includes a first input end and a first output end; the first power connection line is connected to the first input end, the first power connection line includes a first wire body and a first repair part that is arranged in the same layer as and connected to the first wire body, the first repair part is a cut part, and the thickness of the first repair part is less than the thickness of the first wire body; the light-emitting device includes an input electrode, and the input electrode is connected to the first output end.

[0088] Among them, the present application thins the first repair portion of the first power connection line so that the thickness of the first repair portion is smaller than the thickness of the first wire body, and then when performing laser repair, a lower energy laser can be used to cut off the first repair portion.

[0089] The above is a detailed introduction to a display panel provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: a first thin film transistor, wherein the first thin film transistor includes a first input terminal and a first output terminal; a first power connection line, connected to the first input end, comprising a first wire body and a first repair portion provided on the same layer as and connected to the first wire body, wherein the thickness of the first repair portion is less than that of the first wire body; a light emitting device, the light emitting device comprising an input electrode, the input electrode being connected to the first output terminal; The first repairing portion is configured so that after being cut off by laser, a conductive path still exists between the first thin film transistor and the light emitting device and the light emitting device does not work.

2. The display panel according to claim 1, wherein: The first repairing portion is arranged to overlap with the input electrode.

3. The display panel according to claim 2, wherein: At least a portion of the first wire body is overlapped with the input electrode.

4. The display panel according to claim 2, wherein: The display panel includes a substrate and a light shielding layer, a buffer layer, an active layer, a first insulating layer, a first metal layer, a second insulating layer, a second metal layer, a passivation layer and a planar layer sequentially arranged on the substrate, and the input electrode is arranged on the planar layer; The light shielding layer includes a light shielding portion, the light shielding portion is overlapped with the active layer, the active layer includes a first active portion, the first metal layer includes a first gate electrode, the second metal layer includes a first source electrode and a first drain electrode, and the first active portion, the first gate electrode, the first source electrode, and the first drain electrode form the first thin film transistor; One of the first source and the first drain is the first input terminal, and the other of the first source and the first drain is the first output terminal.

5. The display panel according to claim 4, wherein: The first power connection line and the light shielding portion are arranged on the same layer.

6. The display panel according to claim 4, wherein: The first power connection line and the first gate are arranged on the same layer.

7. The display panel according to claim 4, wherein: The first power connection line and the first source electrode are arranged on the same layer.

8. The display panel according to any one of claims 4 to 7, characterized in that: The first power connection line includes a first line body and two first repairing parts; the first power connection line is located on one side of the first thin film transistor; A first repairing portion is connected to a first thin film transistor, and an extending direction of the first wire body intersects with an extending direction of the first repairing portion; Another first repairing portion is connected to another first thin film transistor, and an extending direction of the first line body is the same as an extending direction of the other first repairing portion.

9. The display panel according to any one of claims 4 to 7, wherein: The display panel further includes: a second thin film transistor, the second thin film transistor comprising a second input terminal and a second output terminal; the second output terminal is connected to the input electrode; A second power connection line, the second power connection line is connected to the second input end, the second power connection line includes a second wire body and a second repair part that is arranged on the same layer and connected to the second wire body, the second repair part is the cut part, and the thickness of the second repair part is less than the thickness of the second wire body.

10. The display panel according to claim 9, wherein: The second power connection line is arranged on the same layer as the first power connection line.

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