CN106935600A - A kind of display panel and display device - Google Patents

Abstract

The invention discloses a kind of display panel and display device, on the premise of being corroded in the holding wire in avoiding display panel, realize to the bad analysis of holding wire and performance test.The display panel, including underlay substrate, it is successively set on the first holding wire on the underlay substrate, insulating barrier, secondary signal line and passivation layer, and the secondary signal line is electrically connected with by being arranged on the first via in the insulating barrier with first holding wire, the display panel also includes：The conductive layer on the passivation layer is arranged on, and the conductive layer is electrically connected with by the second via in the passivation layer with the secondary signal line.

Description

A display panel and a display device

technical field

The present invention relates to the field of display technology, in particular to a display panel and a display device.

Background technique

With the increasing development of display devices, consumers are more fond of high-end display devices, and the demand is also increasing, especially for display devices with higher definition and narrower borders. Thin Film Transistor-Liquid Displays (Thin Film Transistor-Liquid Crystal Display, TFT-LCD) factories are constantly improving the design and manufacturing process in order to meet the needs of consumers. In order to meet the needs of high-end displays, the frame of the display is getting narrower and narrower. However, when the purpose of via hole transfer is realized, the conductive layer at the via hole is easily corroded. This problem is a reliability problem. Manufacturers Generally, the method of passing the non-reliability test cannot fully evaluate the level of its risk, which will cause some risk screens to flow into the market, and then there may be serious consequences of receiving complaints, complaints, replacements, returns, and cancellations of orders from customers. .

There are two methods for the product transfer design of the narrow frame of the shift register (GOA) in the frame area of the TN screen:

The first is the transfer design that the current product design uses the lap joint of Indium Tin Oxide Semiconductor Transparent Conductive Film (ITO). For example, referring to FIG. 1, the display panel includes in turn: a base substrate 01, a gate line 02, a gate insulating layer (GI) 03, a data line 04, and a passivation layer (PVX) 05. The display panel also includes 05 above the transparent conductive layer 06, wherein the display panel further includes: a via hole 1 penetrating the passivation layer 05, and a via hole 2 penetrating the passivation layer 05 and the gate insulating layer 03, and the transparent conductive layer 06 passes through The first via hole 1 and the second via hole 2 are electrically connected to the gate line 02 and the data line 04 .

The transparent conductive layer here plays the role of signal transmission, and the signal here is large voltage and high current, which makes it easier to create conditions for electrochemical corrosion.

The second type of current product design uses GI vias for signal transmission, which can effectively isolate external water vapor and impurities, and effectively prevent electrochemical corrosion problems. For example, referring to FIG. 2 , the display panel includes in sequence: a base substrate 01, a gate line 02, a gate insulating layer (GI) 03, a data line 04, and a passivation layer (PVX) 05, wherein the data line 04 is arranged on the gate The via hole 3 3 in the pole insulating layer (GI) 03 is electrically connected to the gate line 02 .

However, this design cannot effectively monitor the output signal of the GOA area, and brings great difficulties or even impossibility to failure analysis and performance testing.

To sum up, when the display panel in the prior art implements a narrow bezel design, it cannot implement defect analysis and performance testing of the signal lines on the premise of avoiding corrosion of the signal lines in the display panel.

Contents of the invention

The present invention provides a display panel and a display device, which are used for realizing defect analysis and performance testing of signal lines on the premise of avoiding the signal lines in the display panel from being corroded.

An embodiment of the present invention provides a display panel, including a base substrate, a first signal line, an insulating layer, a second signal line and a passivation layer arranged on the base substrate in sequence, and the second signal line The wire is electrically connected to the first signal wire through the first via hole provided in the insulating layer, and the display panel further includes:

A conductive layer disposed on the passivation layer, and the conductive layer is electrically connected to the second signal line through a second via hole in the passivation layer.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, projections of the first via hole and the second via hole on the base substrate do not overlap.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the display panel further includes a thin film transistor, and the thin film transistor includes:

Gate, gate insulating layer, active layer, source and drain.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the first signal line and the gate are arranged in the same layer.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the first signal lines include scan lines.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the second signal line is arranged in the same layer as the source and drain electrodes.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the second signal line includes a data line.

In a possible implementation manner, in the above display panel provided by the embodiment of the present invention, the material of the conductive layer is a transparent conductive material.

Correspondingly, an embodiment of the present invention further provides a display device, including any one of the above-mentioned display panels provided by the embodiments of the present invention.

The beneficial effects of the present invention are as follows:

A display panel provided by an embodiment of the present invention includes a base substrate, a first signal line, an insulating layer, a second signal line and a passivation layer disposed on the base substrate in sequence, and a passivation layer disposed on the passivation layer. a conductive layer above the passivation layer, wherein the second signal line is electrically connected to the first signal line through a first via hole provided in the insulating layer, and the conductive layer passes through the passivation layer The second via hole is electrically connected to the second signal line. Therefore, in the display panel provided by the embodiment of the present invention, the electrical signal in the first signal line is transmitted to the second signal line through the via hole provided in the insulating layer, so that the passivation provided above the second signal line can The layer can effectively isolate the water vapor and impurities from the outside world. On the other hand, considering the monitoring of signal output, the embodiment of the present invention sets the second via hole in the passivation layer, and connects the second signal line to the passivation layer by overlapping the conductive layer. The electrical signal is drawn to the surface, and there is only a large voltage but no large current in the conductive layer. It can be seen that the display panel in the embodiment of the present invention can not only effectively improve the problem of electrochemical corrosion, but also meet the purpose of signal line failure analysis and performance testing.

Description of drawings

FIG. 1 is a schematic structural diagram of a display panel provided by the prior art;

FIG. 2 is a schematic structural diagram of another display panel provided by the prior art;

FIG. 3 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

FIG. 4 is a schematic top view of a display panel provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a second display panel provided by an embodiment of the present invention.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all described by taking the accompanying drawings as an example, but changes can also be made according to needs, and all changes are included in the protection scope of the present invention. The accompanying drawings of the present invention are only used to illustrate the relative positional relationship, and the layer thickness of some parts is drawn in an exaggerated manner for easy understanding, and the layer thickness in the drawings does not represent the proportional relationship of the actual layer thickness.

It should be noted that in the following description, specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below. Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred implementation mode for implementing the application, but the description is for the purpose of illustrating the general principles of the application, and is not intended to limit the scope of the application. The scope of protection of the present application should be defined by the appended claims. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or one or more intervening elements may be interposed.

The present invention provides a display panel and a display device, which are used for realizing defect analysis and performance testing of signal lines on the premise of avoiding the signal lines in the display panel from being corroded.

The specific implementation manners of the display panel and the display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The thickness and shape of each film layer in the drawings do not reflect the real scale, and the purpose is only to illustrate the content of the present invention.

Referring to FIG. 3 , the display panel provided by the embodiment of the present invention includes: a base substrate 01, a first signal line 11, an insulating layer 12, a second signal line 13 and a passivation layer 05 sequentially arranged on the base substrate , and the conductive layer 14 disposed on the passivation layer 05, wherein the second signal line 13 is electrically connected to the first signal line 11 through the first via hole 21 disposed in the insulating layer 12, and the conductive layer 14 is electrically connected to the first signal line 11 through the passivation layer 12. The second via hole 22 in the layer 05 is electrically connected to the second signal line 13 .

It should be noted that the display panel in the embodiment of the present invention includes a display area and a frame area, the first via hole and the second via hole in the present invention are arranged in the frame area of the display panel, the first signal line 11, the insulating layer 12 , the second signal line 13 and the passivation layer 05, and the conductive layer 14 disposed on the passivation layer 05 can be disposed in the frame area of the display panel, and can also be disposed in the display area.

For example, refer to FIG. 4 , which is a schematic top view of a display panel in an embodiment of the present invention, and FIG. 3 is a schematic cross-sectional view obtained by cutting along the direction O-O1. In FIG. 4, the first via hole 21 and the second via hole 22 can be superimposed on each other. In FIG. 4, only the projections of the first via hole and the second via hole on the base substrate do not overlap for illustration. The display of the present invention The projections of the first via hole and the second via hole in the panel on the base substrate may also overlap each other. No specific limitation is made here.

In the display panel provided by the embodiment of the present invention, the electrical signal in the first signal line is transmitted to the second signal line through the via hole arranged in the insulating layer, so that the passivation layer arranged above the second signal line can effectively on the other hand, considering the monitoring of signal output, the embodiment of the present invention sets the second via hole in the passivation layer, and connects the electric current in the second signal line through the conductive layer overlapping. The signal is drawn to the surface, and there is only a large voltage but no large current in the conductive layer. It can be seen that the display panel in the embodiment of the present invention can not only effectively improve the problem of electrochemical corrosion, but also meet the purpose of signal line failure analysis and performance testing.

In a specific embodiment, in the above-mentioned display panel provided by the embodiment of the present invention, referring to FIG. 3 or FIG. 4 , the projections of the first via hole 21 and the second via hole 22 on the base substrate 01 do not overlap. Specifically, the positions of the first via hole and the second via hole are not specifically limited, and the second via hole may be arranged above the first via hole so that the first via hole and the second via hole overlap each other.

In a specific embodiment, in the above-mentioned display panel provided by the embodiment of the present invention, referring to FIG. 5 , the display panel further includes a thin film transistor, and the thin film transistor includes: a gate 31, an insulating layer 12, an active source layer 32 , source and drain electrodes 33 . Wherein, the insulating layer 12 may be a gate insulating layer or an interlayer insulating layer, which is not specifically limited here. Moreover, the thin film transistor in the embodiment of the present invention may be a thin film transistor disposed in the display area, or may be a thin film transistor disposed in the shift register unit in the frame area, which is not specifically limited here. Wherein, the thin film transistor may have a top-gate structure or a bottom-gate structure, and here only the bottom-gate structure is taken as an example.

In a specific embodiment, in the above-mentioned display panel provided by the embodiment of the present invention, referring to FIG. 5 , the first signal line 11 is arranged on the same layer as the gate.

In a specific embodiment, in the above display panel provided by the embodiment of the present invention, the first signal lines 11 include scan lines. Specifically, the first signal line may be a scan line, or may be another signal line disposed on the same layer as the gate.

In a specific embodiment, in the above-mentioned display panel provided by the embodiment of the present invention, referring to FIG. 5 , the second signal line 13 is arranged on the same layer as the source and drain electrodes.

In a specific embodiment, in the above display panel provided by the embodiment of the present invention, the second signal line 13 includes a data line. Specifically, the second signal line may be a data line, or may be another signal line provided on the same layer as the source and drain.

In a specific embodiment, in the above display panel provided by the embodiment of the present invention, the material of the conductive layer is a transparent conductive material. Specifically, the conductive layer may be made of a transparent conductive layer material, such as indium tin oxide, or may be made of a metal material, which is not specifically limited here.

Based on the same inventive idea, an embodiment of the present invention further provides a display device, including any one of the above-mentioned display panels provided by the embodiments of the present invention. The display device can be any product or component with a display function such as a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, and the like. For the implementation of the display device, reference may be made to the above-mentioned embodiments of the display panel, and repeated descriptions will not be repeated.

In summary, a display panel provided by an embodiment of the present invention includes a base substrate, a first signal line, an insulating layer, a second signal line, and a passivation layer sequentially arranged on the base substrate, and a conductive layer disposed on the passivation layer, wherein the second signal line is electrically connected to the first signal line through a first via hole disposed in the insulating layer, and the conductive layer passes through The second via hole in the passivation layer is electrically connected to the second signal line. Therefore, in the display panel provided by the embodiment of the present invention, the electrical signal in the first signal line is transmitted to the second signal line through the via hole provided in the insulating layer, so that the passivation provided above the second signal line can The layer can effectively isolate the water vapor and impurities from the outside world. On the other hand, considering the monitoring of signal output, the embodiment of the present invention sets the second via hole in the passivation layer, and connects the second signal line to the passivation layer by overlapping the conductive layer. The electrical signal is drawn to the surface, and there is only a large voltage but no large current in the conductive layer. It can be seen that the display panel in the embodiment of the present invention can not only effectively improve the problem of electrochemical corrosion, but also meet the purpose of signal line failure analysis and performance testing.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (9)

1. A display panel, comprising a base substrate, a first signal line, an insulating layer, a second signal line and a passivation layer arranged on the base substrate in sequence, and the second signal line is arranged on the The first via hole in the insulating layer is electrically connected to the first signal line, wherein the display panel further includes: A conductive layer disposed on the passivation layer, and the conductive layer is electrically connected to the second signal line through a second via hole in the passivation layer. 2 . The display panel according to claim 1 , wherein projections of the first via hole and the second via hole on the base substrate do not overlap. 3. The display panel according to claim 1, wherein the display panel further comprises thin film transistors, and the thin film transistors include: Gate, gate insulating layer, active layer, source and drain. 4. The display panel according to claim 3, wherein the first signal line and the gate electrode are arranged in the same layer. 5. The display panel according to claim 4, wherein the first signal lines comprise scan lines. 6 . The display panel according to claim 3 , wherein the second signal line is arranged on the same layer as the source and drain electrodes. 7. The display panel according to claim 6, wherein the second signal lines comprise data lines. 8. The display panel according to claim 1, wherein the material of the conductive layer is a transparent conductive material. 9. A display device, comprising the display panel according to any one of claims 1-8.