CN115576446A

CN115576446A - Touch panel and display device

Info

Publication number: CN115576446A
Application number: CN202211256451.2A
Authority: CN
Inventors: 程博; 马宏伟; 董向丹; 刘琦; 何帆; 杨双宾
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2023-01-06
Also published as: CN110993659B; CN110993659A

Abstract

The application discloses touch panel and display device, including source drain metal level, be equipped with the protective layer on the source drain metal level, be equipped with flat layer on the protective layer, be equipped with the buffer layer on the flat layer, be equipped with the TLD layer on the buffer layer, the protective layer flat layer organic rete with the buffer layer with be equipped with the via hole on the TLD layer, be equipped with the touch-control metal level on the TLD layer, the touch-control metal level covers the via hole sets up, the touch-control metal level with source drain metal level electricity is connected. According to the technical scheme provided by the embodiment of the application, the through holes are designed on the panel, the touch metal layers are arranged in the through holes, and the wiring of the touch metal layers is electrically connected with the wiring of the source drain metal layers, so that the same signal metal wiring is arranged on the touch metal layers and the source drain metal layers, and cracks can be detected through the PCD no matter which layer is cracked.

Description

Touch panel and display device

Technical Field

The present invention relates generally to the field of AMOLED, and more particularly to a touch panel and a display device.

Background

In an Active-matrix organic light-emitting diode (AMOLED) product, a Flexible Metal-layer on cell Touch (FMLOC) is a trend design product, and compared with an external Touch panel, the Flexible Metal-layer on cell Touch (FMLOC) product can greatly reduce cost, has higher integration level, is lighter and thinner, and is easier to fold.

In the existing FMLOC product, a PCD (crack detection) design is that wires are routed through a TFT (thin film transistor) layer metal, and for the FMLOC product, if the TFT layer is intact and has no crack, and a metal wire of a touch metal layer has a crack, then the crack detection will be determined to pass, which should be regarded as missed detection, because it is impossible to detect whether the touch metal layer is intact by only setting the metal wire on the TFT layer, and it is impossible to detect the touch failure.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a touch panel and a display device.

In a first aspect, a touch panel is provided, which includes a source drain metal layer, a protective layer is disposed on the source drain metal layer, a flat layer is disposed on the protective layer, an organic film layer is disposed on the flat layer, a buffer layer is disposed on the organic film layer, a TLD layer is disposed on the buffer layer, via holes are disposed on the protective layer, the flat layer, the organic film layer, the buffer layer and the TLD layer, a touch metal layer is disposed on the TLD layer, the touch metal layer covers the via holes,

the touch metal layer is electrically connected with the source drain metal layer.

In a second aspect, a display device is provided, which includes the above touch panel.

According to the technical scheme provided by the embodiment of the application, through designing the via hole on the panel, the touch metal layer is arranged in the via hole, and the wiring of the touch metal layer is electrically connected with the winding of the source drain metal layer, so that the same signal metal wiring is arranged on the touch metal layer and the source drain metal layer, and no matter which layer generates cracks, the same signal metal wiring can be detected through the PCD.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a winding structure in the present embodiment;

fig. 2 is a schematic cross-sectional view of the panel of this embodiment with a through hole.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 and fig. 2, the present embodiment provides a touch panel, including a source/drain metal layer 4, a protective layer 5 is disposed on the source/drain metal layer 4, a flat layer 6 is disposed on the protective layer 5, an organic film layer 7 is disposed on the flat layer 6, a buffer layer 8 is disposed on the organic film layer 7, a TLD layer 9 is disposed on the buffer layer 8, via holes 12 are disposed on the protective layer 5, the flat layer 6, the organic film layer 7, the buffer layer 8, and the TLD layer 9, a touch metal layer 10 is disposed on the TLD layer 9, the touch metal layer 10 covers the via holes 12,

the touch metal layer 10 is electrically connected with the source drain metal layer 4.

In this embodiment, a multilayer structure is disposed on a source/drain metal layer, specifically, as shown in fig. 2, the multilayer structure includes a protective layer, a flat layer, a buffer layer, and a TLD layer, holes are punched in the layers, through holes penetrating the layers are disposed, a touch metal layer is covered in the through holes, and the through holes are electrically connected with the source/drain metal layer, so that a function that a same-signal metal trace is disposed on both the touch metal layer and the source/drain metal layer, and no matter which layer has cracks, the same-signal metal trace can be detected by PCD;

the source and drain metal layers are provided with a multilayer structure, each layer needs to be punched in the preparation process, and the through holes in the multiple layers are overlapped to form the through hole.

Further, the via hole 12 is disposed in a non-display area at an edge of the touch panel 14.

As shown in fig. 1, in the embodiment, the via holes are disposed in the non-display area, which does not affect the display function of the touch panel.

Further, the touch metal layer 10 includes two sets of touch metal windings 11 symmetrically disposed on the touch panel 14, the source drain metal layer 4 includes two sets of source drain metal windings 13 symmetrically disposed on the touch panel 14, the touch metal windings 11 and the source drain metal windings 13 are disposed in a one-to-one correspondence, and each pair of the touch metal windings 11 and the source drain metal windings 13 is connected in series.

In this embodiment, carry out the electricity with touch-control metal level and source drain metal level through setting up the via hole, the wire winding that will set up on two metal levels is established ties, when carrying out PCD detection, no matter which layer the crackle homoenergetic appears and detects, as shown in fig. 1, include two sets of touch-control metal wire windings 11 on the touch-control metal level, include two sets of source drain metal wire windings 13 on the source drain metal level, respectively the one-to-one, can arrange as shown in fig. 1 appearance, the display area's of panel both sides set up a pair of touch-control metal wire winding 11 and source drain metal wire winding 13 respectively, and two wire windings are established ties through the via hole and are set up.

Furthermore, four through holes 12 are symmetrically arranged on the touch panel 14.

The source and drain metal windings are usually symmetrically arranged in the touch panel, therefore, the via holes also need to be symmetrically arranged on the touch panel, the connection between the source and drain metal windings on each side and the touch metal windings needs to be realized through two via holes, two ends of the touch metal windings are respectively electrically connected with two ends of the source and drain metal windings, the two windings are connected in series, and particularly, as shown in fig. 1, two via holes are respectively arranged on the left side and the right side.

Further, the aperture of the via hole 12 is 2 μm to 10 μm. The via hole aperture set up in this embodiment should not be too big, can realize that the line of two metal layers is connected electrically can to the via hole sets up at touch panel edge non-display area, and the scope of setting is less, and the via hole sets up less can not influence the display area.

Further, the touch metal layer 10 includes two titanium metal layers, and an aluminum metal layer is further disposed between the two titanium metal layers. In this embodiment, the touch metal layer is preferably a titanium-aluminum-titanium composite layer, and the source/drain metal layer is preferably a molybdenum-aluminum-molybdenum composite layer.

Further, the touch metal routing 11 and the source/drain metal routing 13 are disposed in a non-display area at the edge of the touch panel 14.

The source and drain metal windings on the touch panel are arranged in the edge area of the panel, so that the touch metal windings 11 are also arranged in the non-display area of the edge of the panel, specifically as shown in fig. 1, the two windings are electrically connected through via holes arranged on the touch panel 14, and the via holes are also arranged in the non-display area of the touch panel, which do not affect the display area of the touch panel. The touch metal winding is finished by the process steps of coating a film, etching a photoresist on the film, etching a place needing etching through exposure, and removing the photoresist.

In the touch panel provided in this embodiment, the metal windings of the touch metal layer are disposed on both the left and right sides of the panel, and are connected in series with the windings of the source and drain metal layers on both the left and right sides of the panel, and when a signal voltage, i.e., the VGH voltage shown in fig. 1, is applied to the windings on both the left and right sides, if there is no crack, the panel displays a black picture; when there is a crack in any place, then the pixels connected to the winding will display several long lines in the middle of the screen because the broken line cannot receive the voltage signal and is in the floating state.

The solar cell further comprises a substrate layer 1, wherein a grid layer 2 is arranged on the substrate layer 1, a dielectric layer 3 is arranged on the grid layer 2, a through hole is formed in the dielectric layer 3, a source drain metal layer 4 is arranged on the upper surface of the dielectric layer 3, the source drain metal layer 4 covers the through hole of the dielectric layer, and the source drain metal layer is electrically connected with the grid layer. In this embodiment, a substrate layer is provided, a gate layer and a dielectric layer are disposed on the substrate layer, and a source/drain metal layer covers the through hole on the dielectric layer.

In the embodiment, the through holes are designed on the panel, the touch metal layers are arranged in the through holes, and the wiring of the touch metal layers is connected with the wiring of the source drain metal layers in series, so that the same signal metal wiring is arranged on the touch metal layers and the source drain metal layers, and cracks can be detected through PCD no matter which layer is cracked.

The embodiment also provides a display device comprising the touch panel.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A touch panel comprises a gate layer, a source/drain metal layer and a touch metal layer,

the touch panel comprises a display area and a non-display area surrounding the display area, and a first winding and a second winding arranged around the display area are arranged in the non-display area; the first routing is located on the touch metal layer, and the second routing is located on the source drain metal layer and/or the grid layer; at least one end of the first winding is electrically connected to at least one end of the second winding.

2. The touch panel according to claim 1, wherein an insulating layer is provided between the gate layer and the touch metal layer, or between the source-drain metal layer and the touch metal layer, at least one end of the first winding is electrically connected to at least one end of the second winding through a via hole penetrating through the insulating layer, and the via hole is provided in the non-display region.

3. The touch panel according to claim 2, wherein the first routing is a touch metal routing, the second routing is a source drain metal routing, and the touch metal routing and the source drain metal routing are connected in series through the via hole.

4. The touch panel according to claim 2, further comprising a planarization layer disposed on the source-drain metal layer and an organic film layer disposed on the planarization layer; the touch metal layer is arranged above the organic film layer;

the first winding wire and the second winding wire are electrically connected through a via hole penetrating through the flat layer and the organic film layer.

5. The touch panel according to claim 4, wherein a dielectric layer is disposed on the gate layer, a through hole is disposed on the dielectric layer, a source-drain metal layer is disposed on an upper surface of the dielectric layer, and the source-drain metal layer is electrically connected to the gate layer through the through hole.

6. The touch panel of claim 4, further comprising a buffer layer disposed on the organic film layer, and a touch insulating layer disposed on the buffer layer, wherein the touch insulating layer is provided with the touch metal layer.

7. The touch panel according to claim 4, further comprising a protective layer disposed on the source/drain metal layer, wherein the flat layer is disposed on the protective layer.

8. The touch panel of claim 1, wherein the touch metal layer comprises two titanium metal layers, and an aluminum metal layer is disposed between the two titanium metal layers.

9. The touch panel according to claim 3, wherein the touch metal layer includes two sets of touch metal windings, the source drain metal layer includes two sets of source drain metal windings, the touch metal windings and the source drain metal windings are arranged in a one-to-one correspondence, and each pair of the touch metal windings is connected in series with the source drain metal windings.

10. A display device comprising the touch panel according to any one of claims 1 to 9.