WO2020220594A1

WO2020220594A1 - Panel structure and panel manufacturing method

Info

Publication number: WO2020220594A1
Application number: PCT/CN2019/111107
Authority: WO
Inventors: 徐正兴
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2019-04-30
Filing date: 2019-10-14
Publication date: 2020-11-05
Also published as: CN110133901A

Abstract

Disclosed are a panel structure (40) and a panel manufacturing method. The panel structure (40) comprises a first substrate (42), a second substrate (44), a first transparent electrode layer (400), a second transparent electrode layer (402), an elastic glue (46), electric conduction balls (48) and a color resistance layer (408). The electric conduction balls (48) are located in the elastic glue (46) and arranged between the first transparent electrode layer (400) and the second transparent electrode layer (402) to electrically connect the first transparent electrode layer (400) and the second transparent electrode layer (402). It is thus guaranteed that the electric conduction balls (48) located in the elastic glue (46) can be compressed by using the panel structure (40), such that the first substrate (42) and the second substrate (44) are in electrical conduction with each other.

Description

Panel structure and panel manufacturing method

Technical field

The present invention relates to the field of display technology, in particular to a liquid crystal panel structure and a liquid crystal panel manufacturing method.

Background technique

In recent years, liquid crystal display panels have been widely used in various electronic devices. How to improve the narrow viewing angle has always been a problem to be improved in the field of liquid crystal display. At present, the commonly used wide viewing angle liquid crystal display technology is the horizontal electric field effect (In-Plane Switching, IPS) display technology and the vertical alignment (Vertical Alignment, VA) liquid crystal display technology. Compared with IPS display technology, VA liquid crystal display technology has the advantages of high contrast and low light leakage.

Multi-domain vertical alignment mode (Multi_domain Vertical Alignment, MVA) is a type of VA liquid crystal display technology that uses protrusions on the color film side to achieve multi-domain display, thereby improving the viewing angle of the vertical alignment mode. However, due to the protrusions on the color film side, the deflection range of the liquid crystal molecules around the protrusions is limited, and light leakage is also serious. The graphical vertical alignment mode (Patterned Vertical Alignment (PVA) is to make corresponding ITO slits on the transparent electrode of indium tin oxide (ITO) on the color film side. There is no need to make color film side protrusions. The width of the slit is usually about 8-15 microns to achieve multi-domain display. This method greatly reduces the corresponding light leakage.

The High Vertical Alignment (HVA) mode is also one of the VA liquid crystal display technologies. The HVA liquid crystal display technology uses the vertical electric field between the pixel electrode and the common electric shape of the color film substrate to control the liquid crystal molecules in the liquid crystal layer. direction. When making HVA display panels, metal balls are mixed in the sealant and coated on both sides of the substrate or one of the left and right sides of the substrate, so that the upper and lower substrate circuits can be turned on, so that they can pass through the photoelectric field alignment process. The circuit aligns the liquid crystal layer, and the commonly used frame sealing glue is polyester polyurethane glue (AU glue).

Figure 1 shows a common HVA display panel structure. AU glue 16 is glued between the upper board 12 and the lower board 14. A metal ball 18 is placed in the AU glue 16 to make the upper board 12 and the lower board 14 electrically conductive. . In the HVA display panel, the conductivity between the upper plate 12 and the lower plate 14 greatly affects the display quality, especially in the laser on color-filter (Laser On Color-filter, In the LOC process, the conductivity of the upper and lower substrates will affect the success of the liquid crystal alignment. If the upper and lower plates cannot be electrically connected, the liquid crystal alignment effect will be poor, resulting in poor display effect or abnormal display.

The metal ball 18 in the HVA display panel is usually formed by gold plating on the surface of plastic spherical particles. Therefore, the metal ball 18 is elastic and compressible, and the AU glue 16 is also elastic. Therefore, when the upper board 12 and the lower board 14 are attached At this time, the metal 18 ball will be compressed so that the upper plate 12 and the lower plate 14 can be electrically connected.

Because there are many film layers between the upper board 12 and the lower board 14, that is, the height of the AU glue coating position is inconsistent, and due to the limitation of process redundancy (for example, under the condition of substrate bending or heavy pressure), the upper and lower substrates have different positions The inconsistency in the degree of compression will result in inconsistent compression of the metal balls 18 at different positions, as shown in FIG. 2.

technical problem

Please refer to FIG. 3, there is a layer of ITO transparent electrode layer 102 between the upper plate 12 and the lower plate 14 respectively. In addition, there may be more layers in the display panel, such as a metal wire layer 104 and an insulating layer 106. In some film structures, because there are other films and components in the display panel, the distance between the two ITO transparent electrode layers 102 between the upper plate and the lower plate is too wide, or the display panel is bent due to external force, which makes the upper plate The metal ball 18 between the board 12 and the lower board 14 is not compressed. If the metal ball 18 cannot be compressed, the upper and lower ITO transparent electrode layers cannot be conducted, making the panel unable to display normally.

Therefore, a panel structure is needed to ensure that the metal balls located in the AU glue layer can be compressed, so that the upper and lower substrates are connected to each other.

Technical solutions

The invention provides a panel structure including a first substrate, a second substrate, a first transparent electrode layer, a second transparent electrode layer, elastic glue, conductive balls and a color resist layer. The first transparent electrode layer is disposed between the first substrate and the second substrate. The elastic glue is arranged on the first transparent electrode layer. The second transparent electrode layer is disposed between the elastic glue and the second substrate. The conductive ball is located in the elastic glue and is disposed between the first transparent electrode layer and the second transparent electrode layer, and is used to electrically connect the first transparent electrode layer and the second transparent electrode layer . The color resist layer is located between the second transparent electrode layer and the second substrate.

Preferably, the panel structure includes a black matrix disposed between the first substrate and the first transparent electrode layer.

Preferably, the width of the black matrix is less than or equal to the second transparent electrode layer.

Preferably, the panel structure includes a metal wire layer and an insulating layer, which are disposed between the second transparent electrode layer and the second substrate.

Preferably, the widths of the metal wire layer and the insulating layer are less than or equal to the second transparent electrode layer.

The present invention also provides a panel manufacturing method for manufacturing a panel structure including a first substrate and a second substrate. The panel manufacturing method includes: providing a first substrate; providing a second substrate and the first substrate spaced apart; Disposing a color resist layer on the second substrate; disposing a first transparent electrode layer and a second transparent electrode layer on the color resist layer; disposing elastic glue and conductive balls on the first transparent electrode layer and the first transparent electrode layer Between two transparent electrode layers; wherein the first transparent electrode layer is located between the first substrate and the elastic glue.

Preferably, the panel manufacturing method includes disposing a black matrix between the first transparent electrode and the first substrate.

Preferably, the panel manufacturing method includes disposing an insulating layer and a metal wire layer between the second transparent electrode layer and the second substrate.

Beneficial effect

The advantage of the present invention is that through the panel structure and the panel manufacturing method provided by the present invention, the distance between the transparent electrodes of the first and second substrates can be shortened, so that the conductive balls located between the two transparent electrode layers are compressed, and The electrodes of the first and second substrates are electrically connected to ensure that the liquid crystal molecules in the HVA display panel can rotate according to the driving direction and display the correct color to ensure the correct picture and color of the HVA display panel.

Description of the drawings

Figure 1 shows a schematic diagram of the structure of an existing HVA display panel;

Figure 2 shows a schematic diagram of poor conduction of the existing HVA display panel;

Fig. 3 is a schematic diagram showing poor conduction of the existing HVA display panel;

FIG. 4 is a schematic diagram showing the structure of the HVA display panel of the present invention.

The best mode of the invention

The display panel and display device provided by the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Figure 4 is a schematic diagram of the structure of the HVA display panel of the present invention. As shown in FIG. 4, the display panel 40 of the present invention has a first substrate 42, a second substrate 44, elastic glue 46 and conductive balls 48. A first transparent electrode layer 400 and a second transparent electrode layer 402 are respectively provided below the first substrate 42 and above the second substrate. Preferably, the first transparent electrode layer 400 and the second transparent electrode layer 402 are made of indium tin oxide (ITO). Between the first transparent electrode layer 400 and the second transparent electrode layer 402, an elastic glue 46 and a conductive ball 48 are provided. The surface of the conductive ball 48 is coated with a conductor. Therefore, in the embodiment of the present invention, the first transparent electrode layer 400 and the second transparent electrode layer 402 may be electrically connected through conductive balls 48. There are also a metal wire layer 404 and an insulating layer 406 between the first substrate 42 and the second substrate 44. The metal wire layer 404 is used to transmit driving signals such as data signals or scan signals, and the insulating layer 406 is used to block the metal wire layer 404. Each of the data lines and scan lines, or the gate electrode, drain electrode and source electrode of a blocking transistor (not shown).

The HVA display panel 40 of the present invention is provided with a color resist layer 408 between the second transparent electrode layer and the second substrate 44. Since the thickness of the color resist layer of various colors is different, according to the first transparent electrode layer 400 and the second transparent electrode layer For the distance between 402, red, green or blue color resist can be selected to form the color resist layer 408. By providing the color resist layer 408 with a certain thickness, it is ensured that the first transparent electrode layer 400 and the second transparent electrode layer 402 can pass through The conductive balls 48 are in electrical contact, thereby ensuring that the liquid crystal molecules in the HVA display panel can correctly follow the electric field alignment between the first transparent electrode layer 400 and the second transparent electrode layer 402.

Here, the HVA display panel 40 of the present invention may also include a black matrix (Black Matrix, BM) 410. The black matrix 410 is disposed between the first substrate 42 and the first transparent electrode layer 400 to connect the first transparent electrode layer 400 pushes toward the second transparent electrode layer 402, so that the distance between the first transparent electrode layer 400 and the second transparent electrode layer 402 is shortened, so as to ensure that the first transparent electrode layer 400 and the second transparent electrode layer 402 are electrically conductive. Ball 48 makes electrical contact.

In a preferred embodiment of the present invention, the LOC process is used to form the color film in the manufacturing process of the display panel 40, so the area of the black matrix 410 cannot overlap with the area where the laser is used in the LOC process to avoid affecting the effect of the LOC process.

The above description is only an embodiment and is not intended to limit the present invention. According to the structure of the panel and the spacing of the transparent electrodes, a color resist layer may also be provided between the first transparent electrode 400 and the black matrix 410 in FIG. A color resist layer is arranged between the substrate 42 and the black matrix 410, thereby further shortening the distance between the two transparent electrode layers. Similarly, under the premise of not affecting the circuit conduction and display effect of the display panel, the second substrate 44, the metal wire layer 404, the insulating layer 406 or the second transparent electrode layer 402 in FIG. 4 can also be arranged between any two layers. The black matrix shortens the distance between the first transparent electrode layer 400 and the second transparent electrode layer 402.

Through the HVA display panel structure provided by the embodiments of the present invention, the distance between the transparent electrodes of the first and second substrates can be shortened, so that the conductive balls located between the two transparent electrode layers are compressed to conduct the first and second substrates. The electrodes of the substrate ensure that the liquid crystal molecules in the HVA display panel can rotate according to the driving direction and display the correct color to ensure the correctness of the picture and color of the HVA display panel.

The above are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the present invention. The scope of protection.

Claims

A panel structure including:

First substrate

The second substrate and the first substrate are spaced apart;

The first transparent electrode layer is disposed between the first substrate and the second substrate;

Elastic glue, arranged on the first transparent electrode layer;

The second transparent electrode layer is arranged between the elastic glue and the second substrate:

A conductive ball, located in the elastic glue, is disposed between the first transparent electrode layer and the second transparent electrode layer, and is used to electrically connect the first transparent electrode layer and the second transparent electrode layer; as well as

A color resist layer located between the second transparent electrode layer and the second substrate;

The black matrix is arranged between the first substrate and the first transparent electrode layer;

The metal wire layer is disposed between the second transparent electrode layer and the second substrate; and

An insulating layer disposed between the second transparent electrode layer and the second substrate;

The width of the black matrix is less than or equal to the second transparent electrode layer, and the widths of the metal wire layer and the insulating layer are less than or equal to the second transparent electrode layer.
A panel structure including:

First substrate

The second substrate and the first substrate are spaced apart;

The first transparent electrode layer is disposed between the first substrate and the second substrate;

Elastic glue, arranged on the first transparent electrode layer;

The second transparent electrode layer is arranged between the elastic glue and the second substrate:

A conductive ball, located in the elastic glue, is disposed between the first transparent electrode layer and the second transparent electrode layer, and is used to electrically connect the first transparent electrode layer and the second transparent electrode layer; as well as

The color resist layer is located between the second transparent electrode layer and the second substrate.
The panel structure of claim 2 comprising a black matrix, which is disposed between the first substrate and the first transparent electrode layer.
8. The panel structure of claim 3, wherein the width of the black matrix is less than or equal to the second transparent electrode layer.
The panel structure of claim 2 comprising a metal wire layer and an insulating layer, which are disposed between the second transparent electrode layer and the second substrate.
8. The panel structure of claim 5, wherein the widths of the metal wire layer and the insulating layer are less than or equal to the second transparent electrode layer.
A method for manufacturing a panel, including:

Provide a first substrate;

Providing a second substrate and the first substrate spaced apart;

Disposing a color resist layer on the second substrate;

Disposing a first transparent electrode layer and a second transparent electrode layer on the color resist layer;

Arranging elastic glue and conductive balls between the first transparent electrode layer and the second transparent electrode layer;

The first transparent electrode layer is located between the first substrate and the elastic glue.
8. The method of manufacturing a panel according to claim 7 comprising disposing a black matrix between the first transparent electrode and the first substrate.
8. The panel manufacturing method of claim 8, wherein the width of the black matrix is less than or equal to the second transparent electrode layer.
8. The method of manufacturing a panel according to claim 7 comprising disposing an insulating layer and a metal wire layer between the second transparent electrode layer and the second substrate.
10. The panel manufacturing method of claim 10, wherein the widths of the metal wire layer and the insulating layer are less than or equal to the second transparent electrode layer.