WO2021056756A1

WO2021056756A1 - Display panel and display device

Info

Publication number: WO2021056756A1
Application number: PCT/CN2019/118514
Authority: WO
Inventors: 边家快
Original assignee: 武汉华星光电技术有限公司
Priority date: 2019-09-23
Filing date: 2019-11-14
Publication date: 2021-04-01
Also published as: CN110596922B; CN110596922A

Abstract

A display panel (10, 11) and a display device (1). The display panel (10, 11) comprises: an array substrate (130); a color filter substrate (120) provided at the array substrate (130), a region of the array substrate (130) not covered by the color filter substrate (120) being a first region (131); a liquid crystal cell test terminal (150) provided in the first region (131); a silver glue (180) provided at a second side surface of the color filter substrate (120) away from the array substrate (130) and extending to the first region (131); and an anisotropic conductive adhesive (170) provided between the liquid crystal cell test terminal (150) and the silver glue (180).

Description

Display panel and display device

Technical field

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

Background technique

Thin film transistor liquid crystal displays have the characteristics of small size, low power consumption, and no radiation. In recent years, they have developed rapidly and occupy a dominant position in the current flat panel display market. At present, TFT-LCD has been widely used in various large, medium and small size products, almost covering the main electronic products of today’s information society, such as LCD TVs, high-definition digital TVs, computers (desktops and notebooks), mobile phones, PDA, GPS, car display, projection display, video camera, digital camera, electronic watch, calculator, electronic instrument, meter, public display and unreal display, etc.

When the display panel is working normally, there will still be an Electrostatic Discharge (ESD) phenomenon. Electrostatic discharge causes most electronic components or electronic systems to be subjected to excessive electrical stress (Electrical Discharge). Overstress (EOS) is the main factor of damage. This damage will cause permanent damage to the semiconductor device, leading to the failure of the integrated circuit function. Therefore, the display panel also needs to be equipped with an electrostatic protection circuit for normal display. The circuit is electrically connected with the signal line in the display panel.

In order to improve the static dissipating ability of small-size liquid crystal display modules, two schemes are usually adopted: high-resistance film + silver glue dot; conductive polarizer + silver glue scribing.

At present, when the small-size liquid crystal display module adopts a high-resistance film design scheme compared with a conductive polarizer design scheme, the cost of the former will increase by 1.6 RMB/piece compared with the latter.

Narrow frame and small size liquid crystal display module (COF product or COG product), when the conductive polarizer + silver glue scribing process is used, the silver glue overflows to the test terminal of the liquid crystal cell after the glue is sealed, causing the product to display a large current and a bad ratio Nearly 40%.

technical problem

In order to solve the above technical problems, the present invention provides a display panel and a display device to solve the technical problem that the liquid crystal cell test terminal is short-circuited due to the overflow of the scribed silver glue in the prior art, thereby causing the display panel to be defective.

Technical solutions

The technical solution for solving the above-mentioned technical problems is: the present invention provides a display panel including an array substrate; a color filter substrate arranged on the array substrate, wherein the color filter substrate and the array substrate include oppositely arranged A first side surface and a second side surface, the first side surface of the array substrate is aligned with the first side surface of the color filter substrate, wherein the area of the array substrate exposed to the color filter substrate is the first area; A polarizer is provided on the side of the color filter substrate away from the array substrate; the liquid crystal cell test terminal is provided in the first area of the array substrate close to the color filter substrate; and the silver glue is provided in the first area of the array substrate near the color filter substrate. The color filter substrate is far away from the array substrate and extends along the second side surface of the color filter substrate to the first area; anisotropic conductive glue is provided between the liquid crystal cell test terminal and the silver glue between.

Further, the display panel further includes a second polarizer, which is disposed on a side of the array substrate away from the color filter substrate.

Further, the first polarizer and the second polarizer are conductive polarizers, and the silver glue is electrically connected to the first polarizer.

Further, the display panel further includes a flexible circuit board, including a pressing part, the pressing part is provided in the first area of the array substrate close to the color filter substrate; the liquid crystal cell test terminal Are arranged on both sides of the first area, and the pressing part is arranged between the test terminals of the liquid crystal cell.

Further, the pressing part is covered with an anisotropic conductive film.

Further, the distance between the pressing part and the second side surface of the color filter substrate is equal to the distance between the liquid crystal cell test terminal and the second side surface of the color filter substrate.

Further, the anisotropic conductive adhesive extends from the test terminal of the liquid crystal cell to the flexible circuit board and covers the pressing part of the flexible circuit board.

Further, the first area further includes a silver glue coating area, the silver glue coating area is provided on the side of the liquid crystal cell test terminal away from the flexible circuit board, and the silver glue coating area is filled with述银胶。 Said silver glue.

Further, the projection of the silver glue in the first area overlaps with the projection of the test terminal of the liquid crystal cell in the first area.

The present invention provides a display device including the display panel.

Beneficial effect

The display panel and display device of the present invention cover a layer of anisotropic conductive glue on the liquid crystal cell test terminal to avoid the overflow of silver glue from causing short circuit of the liquid crystal cell test terminal, and at the same time, the distance between the flexible circuit board and the edge of the color film substrate can be adjusted so that The distance from the test terminal of the liquid crystal cell to the edge of the color filter substrate is the same, so that the anisotropic conductive adhesive can cover the flexible circuit board and the test terminal of the liquid crystal cell at one time, saving process.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a side view of the display panel in Embodiment 1. FIG.

FIG. 2 is a partial schematic diagram of the display panel in Embodiment 1. FIG.

FIG. 3 is a schematic diagram of the display device in Embodiment 1. FIG.

4 is a partial schematic diagram of the display panel in the second embodiment.

In the picture

1 Display device; 10. 11 display panel;

110 first polarizer; 120 Color film substrate;

130 Array substrate; 140 second polarizer;

131 First zone; 150 LCD box test terminal;

160 Flexible circuit board; 161 Pressing part;

170 Anisotropic conductive adhesive; 180 silver glue;

181 Silver glue coating area;

Embodiments of the present invention

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments in which the present invention can be implemented. The directional terms mentioned in the present invention, such as "up", "down", "front", "rear", "left", "right", "top", "bottom", etc., are only for reference to additional drawings direction. Therefore, the directional terms used are used to describe and understand the present invention, rather than to limit the present invention.

Example 1

As shown in FIG. 1, in this embodiment, the display panel 10 of the present invention includes a first polarizer 110, a color filter substrate 120, an array substrate 130 and a second polarizer 140.

The first polarizer 110 and the second polarizer 140 are both conductive polarizers, the second polarizer 110 is provided on the color filter substrate 120 on the side away from the array substrate 130, and the second polarizer The sheet 140 is arranged on the side of the array substrate 130 away from the color filter substrate 120. The first polarizer 110 and the second polarizer 140 both have conductive properties and have the ability to attract electrons. The conductive polarizer itself The flexibility enables it to cover the color filter substrate 120 and the array substrate 130, and based on its conductivity, the conductive polarizer can form an electrostatic shielding space, so that the display panel 10 can avoid interference from external electric fields, It has a certain protective effect, so that the display panel 10 has a certain anti-shock performance.

The color filter substrate 120 is arranged opposite to the array substrate 130, wherein one side of the color filter substrate 120 is aligned with one side of the array substrate 130, and the other side of the array substrate 130 protrudes from the other side of the array substrate 130. In the color filter substrate 120, the portion of the array substrate 130 exposed to the color filter substrate 120 is the first area 131.

As shown in FIG. 2, a number of cell test pads 150 (cell test pads) are provided on both ends of the first area 131, and a flexible circuit board 160 is attached to the middle of the first area 131. The flexible circuit board 160 includes a pressing part 161, wherein the pressing part 161 is pressed on the first area 131, and the flexible circuit board 160 is connected to the array substrate 130 through the pressing part 161 .

In order to prevent the circuit traces on the pressing part 161 from being short-circuited, a layer of anisotropic conductive adhesive 170 is covered on the pressing part 161. The anisotropic conductive adhesive 170 has the ability to conduct laterally and block vertically. The conductive particles are used to connect the electrodes between the pressing portion 161 and the array substrate 130 to make them conductive, and at the same time, it is possible to avoid a conductive short circuit between two adjacent electrodes.

The silver glue 180 connects the first polarizer 110, the side of the color filter substrate 120 and the first area 131 of the array substrate 130, and the first area 131 is provided with a silver glue coating area 181, The silver glue coating area 181 is provided on the side of the liquid crystal cell test terminal 150 away from the pressing portion 161. The silver glue 180 fills the silver glue coating area 181. Since the silver glue 180 is in a fluid state during coating, it is easy to overflow the silver glue coating area 181 and spread to the silver glue coating area 181. The adjacent liquid crystal cell test terminals 150 cause the liquid crystal cell test terminals 150 to be short-circuited.

In this embodiment, the liquid crystal cell test terminal 150 is covered with a layer of anisotropic conductive glue 170. When the silver glue 180 overflows the silver glue coating area 181, due to the anisotropic conductive glue 170 It has the capability of conducting laterally and blocking longitudinally, which can prevent the liquid crystal cell test terminal 150 from being short-circuited.

As shown in FIG. 3, in this embodiment, the display device 1 of the present invention includes the display panel 10. Its main technical features and main technical effects are all concentrated on the display panel 10. The rest of the components will not be repeated one by one.

Example 2

In this embodiment, the structure of the display panel 11 of the present invention is substantially similar to that of the display panel 10 in Embodiment 1. As shown in FIG. 4, the difference lies in the distance between the pressing portion 161 in the display panel 11 of the present invention The distance of the color filter substrate 120 is equal to the distance between the liquid crystal cell test terminal 150 and the color filter substrate 120, so that the design can simultaneously cover anisotropic conductivity on the pressing part 161 and the liquid crystal cell test terminal 150 Glue 180 reduces the preparation steps and saves costs.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Inside.

Claims

A display panel, which includes

Array substrate

The color filter substrate is arranged on the array substrate, wherein the color filter substrate and the array substrate include a first side surface and a second side surface disposed opposite to each other, the first side surface of the array substrate and the color filter substrate The first side surfaces of the array substrate are aligned, wherein the area of the array substrate exposed to the color filter substrate is the first area;

The first polarizer is arranged on the side of the color filter substrate away from the array substrate;

The liquid crystal cell test terminal is arranged in the first area of the array substrate close to the color filter substrate;

Silver glue, arranged on a side of the color filter substrate away from the array substrate and extending to the first area along the second side surface of the color filter substrate;

Anisotropic conductive glue is arranged between the test terminal of the liquid crystal cell and the silver glue.
The display panel according to claim 1, further comprising

The second polarizer is arranged on the side of the array substrate away from the color filter substrate.
The display panel according to claim 2, wherein:

The first polarizer and the second polarizer are conductive polarizers, and the silver glue is electrically connected to the first polarizer.
The display panel according to claim 1, further comprising

The flexible circuit board includes a pressing part provided in the first area of the array substrate close to the color filter substrate;

The liquid crystal cell test terminals are arranged on both sides of the first area, and the pressing part is arranged between the liquid crystal cell test terminals.
The display panel according to claim 4, wherein:

The pressing part is covered with an anisotropic conductive film.
The display panel according to claim 4, wherein:

The distance between the pressing portion and the second side surface of the color filter substrate is equal to the distance between the liquid crystal cell test terminal and the second side surface of the color filter substrate.
The display panel according to claim 6, wherein:

The anisotropic conductive adhesive extends from the test terminal of the liquid crystal cell to the flexible circuit board and covers the pressing part of the flexible circuit board.
The display panel according to claim 4, wherein:

The first area further includes a silver glue coating area, the silver glue coating area is provided on the side of the liquid crystal cell test terminal away from the flexible circuit board, and the silver glue coating area is filled with the silver glue .
The display panel according to claim 1, wherein:

The projection of the silver glue in the first area overlaps with the projection of the liquid crystal cell test terminal in the first area.
A display device comprising the display panel of claim 1.