WO2020233339A1

WO2020233339A1 - Display device and manufacturing method thereof

Info

Publication number: WO2020233339A1
Application number: PCT/CN2020/086519
Authority: WO
Inventors: 张桂雪; 王承贤; 张湖; 李金华; 李鑫; 杨映帆
Original assignee: 京东方科技集团股份有限公司; 绵阳京东方光电科技有限公司
Priority date: 2019-05-17
Filing date: 2020-04-23
Publication date: 2020-11-26
Also published as: CN109979333B; CN109979333A

Abstract

A display device and a manufacturing method thereof. The display device comprises: a display panel having a display portion (1) and a bonding portion (2) extending outwardly from one side of the display portion (1), the width of the bonding portion (2) in a direction perpendicular to the extension direction is less than the width of the display portion (1) in the direction perpendicular to the extension direction; a chip on film (7) bonded to the display portion (1) by means of the bonding portion (2); and a heat insulation dam (5) located at a bonding corner position (A) at which the display portion (1) and the bonding portion (2) are bonded and connected together, so as to absorb heat generated when edge cutting is performed on the display portion (1) and the bonding portion (2).

Description

Display device and manufacturing method thereof

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on May 17, 2019, the application number is 201910410837.6, and the application name is "a display panel and its manufacturing method, and display device", the entire content of which is incorporated by reference In this application.

Technical field

The present disclosure relates to the technical field of display devices, in particular to a display device and a manufacturing method thereof.

Background technique

Special-shaped cutting is required during the manufacturing process of the display panel. In the special-shaped cutting process, the cutting area is recessed to the corner inside the array substrate and the heat diffuses inward. Due to the thermal influence, the stress at the corner cannot be released, and it is easy to generate at the corner of the cutting area. Broken, resulting in defective fixed position lines.

Summary of the invention

The present disclosure provides a display device, which includes:

A display panel, the display panel having a display portion and a binding portion extending outward from one side of the display portion, the binding portion having a width perpendicular to the extending direction is smaller than that of the display portion in the vertical direction Width in the extending direction;

A chip on film, the chip on film is bound to the display portion through the binding portion;

The heat insulation dam is located at the binding corner position of the binding connection between the display part and the binding part to absorb heat when the display part and the binding part are edge-cut .

In a possible implementation manner, the shape of the heat insulation dam is consistent with the edge shape of the display portion and the binding portion at the binding corner position.

In a possible implementation, the shape of the thermal insulation dam is an "L" shape.

In a possible embodiment, the thermal insulation dam includes a first side extending in a first direction and a second side extending in a second direction, and both the first side and the second side include at least two sides. Rows of small rectangular blocks arranged at intervals.

In a possible implementation, each two adjacent rows of rectangular small blocks on the first side do not overlap in a direction perpendicular to the first direction, and each phase on the second side Two adjacent rows of rectangular small blocks do not overlap in the direction perpendicular to the second direction.

In a possible implementation manner, each two adjacent rows of rectangular small blocks on the first side partially overlap in a direction perpendicular to the first direction, and each phase on the second side Two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction.

In a possible implementation, each two adjacent rows of rectangular small blocks on the first side do not overlap in a direction perpendicular to the first direction, and each phase on the second side Two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction.

In a possible implementation manner, each two adjacent rows of rectangular small blocks on the first side partially overlap in a direction perpendicular to the first direction, and each phase on the second side Two adjacent rows of rectangular small blocks do not overlap in the direction perpendicular to the second direction.

In a possible implementation manner, the material of the thermal insulation dam is amorphous silicon.

In a possible implementation manner, one heat insulation dam is provided at each binding corner position of the binding connection between the display part and the binding part.

In a possible implementation manner, a plurality of the heat insulation dams are provided at each binding corner position of the binding connection between the display part and the binding part.

In a possible implementation manner, the display panel includes a crack-preventing dam surrounding a first side edge, and the first side edge is a side edge of the display part excluding a connection with the binding part.

In a possible implementation manner, at the binding corner position, the thermal insulation dam is located on a side of the anti-cracking dam away from the display portion.

In a possible implementation manner, the display device includes a flexible circuit board; the flexible circuit board is connected to the chip on film.

The embodiment of the present disclosure also provides a manufacturing method for manufacturing the display device as provided in the embodiment of the present disclosure, wherein the method includes:

A display panel to be cut is provided, wherein the display panel to be cut includes a cutting line, an area to be removed on one side of the cutting line, and a reserved area on the other side of the cutting line, the reserved area having a display portion , A binding part extending outward from one side of the display part, and a heat insulation dam located at the binding corner of the binding connection between the display part and the binding part;

Cut along the cutting line.

In a possible implementation manner, the providing a display panel to be cut includes:

The heat insulation dam is formed at the binding corner position of the display part and the binding part.

Description of the drawings

FIG. 1 is a schematic structural diagram of a display device in the related art;

Fig. 2 is a partial enlarged schematic diagram of the structure of Fig. 1 in the dashed circle A;

3 is a schematic structural diagram of a display device provided by the present disclosure;

4 is a schematic diagram of a partial enlarged structure of FIG. 3 in the dashed circle A;

5 is a schematic diagram of the thermal insulation dam provided by an embodiment of the present disclosure including a plurality of rectangular small blocks;

Figure 6 is one of the schematic diagrams of the thermal insulation dam provided by the present disclosure including a plurality of rectangular small blocks;

Figure 7 is the second schematic diagram of the thermal insulation dam provided by the present disclosure including a plurality of rectangular small blocks;

Figure 8 is the third schematic diagram of the thermal insulation dam provided by the present disclosure including a plurality of rectangular small blocks;

Figure 9 is a fourth schematic diagram of the thermal insulation dam provided by the present disclosure including a plurality of rectangular small blocks;

FIG. 10 is a schematic diagram of the display device provided by the present disclosure with two layers of thermal insulation dams;

FIG. 11 is a schematic top view of the display device provided by the present disclosure with an anti-cracking dam;

12 is a schematic cross-sectional view of the display device provided by the present disclosure with an anti-cracking dam;

FIG. 13 is a schematic diagram of a display device provided with a flexible circuit board provided by the present disclosure;

FIG. 14 is a schematic diagram of a manufacturing process of a display device provided by the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the related art, see FIG. 1 and FIG. 2, where FIG. 2 is an enlarged schematic diagram of FIG. 1 at the dotted line coil A. The display device includes a display portion 01, a binding portion 02 located on the side of the display portion 01, and The bonding part 02 and the display part 01 are bonded to the chip on film 07, and the flexible circuit board 08 connected to the chip on film 07, when the display device is cut along the cutting line OO, the film layer at the corner position A will be bonded Cracks are generated, which in turn causes the data line (Data line) adjacent to the binding corner position A to be broken, which causes one or more columns of pixels R to not emit light, resulting in line defects.

Based on this, please refer to FIG. 3, the present disclosure provides a display device, including:

The display panel, the display panel has a display portion 1, and a binding portion 2 extending outward from one side of the display portion 1 (such as along the third direction EF in FIG. 1), and the binding portion 2 is perpendicular to the extending direction ( The width of the third direction EF) is smaller than the width of the display portion perpendicular to the extension direction (third direction EF), that is, the width of the binding portion 2 is smaller than the width of the display portion 1, and the two have binding corner positions at the binding position A;

The chip on film 7 is bound with the display portion 1 through the binding portion 2;

The heat insulation dam 5 is located at the binding corner position A of the binding connection between the display part 1 and the binding part 2 to absorb the heat when the display part 1 and the binding part 2 are edge-cut.

As shown in Figure 4, Figure 4 is a schematic diagram of the enlarged structure of Figure 3 at the binding corner A. The display device performs edge cutting along the dotted line OO in the figure when cutting the binding corner position A, and the thermal insulation dam 5 is located in the cutting On the inner side of the line OO, when the display device is cut along the cutting line OO, the heat generated when cutting at the corner position A can be absorbed by the heat insulation dam 5, which prevents the heat from spreading inward during cutting and eliminates the stress caused by thermal influence , To reduce the occurrence of chamfer cracks (Crack), thereby reducing the occurrence of defective fixed position lines.

It should be noted that, in order to more conveniently understand the structure of the display device provided by the embodiment of the present disclosure, FIGS. 3 and 4 are schematic illustrations of the structure before edge cutting of the display device. The display device of the embodiment of the present disclosure may In order to cut along the edge of the display device of FIG. 3, the display device is cut along the cutting line OO, before cutting, there is a removal area on the side of the cutting line OO (that is, the area on the right side of the cutting line OO in FIG. 4) And the reserved area on the other side of the cutting line OO (that is, the area on the left side of the cutting line OO in FIG. 4). The reserved area may specifically include the display portion 1 and the frame portion surrounding the display portion 1 (that is, the display portion 1 in FIG. 4). And the area between the cutting line OO). The binding corner position A also has an invalid area D (that is, the outside of the cutting line OO at the binding corner A), which is removed at the time of cutting.

In specific implementation, as shown in FIGS. 3 and 4, the shape of the heat insulation dam 5 is consistent with the edge shape of the display portion 1 and the binding portion 2 at the binding corner position A. That is, if the edge shape of the binding portion 2 at the binding corner position A is L-shaped, the shape of the heat insulating dam 5 is also L-shaped. Specifically, the L-shaped thermal insulation dam 5 may be a smooth transition type arc-shaped L shape, or a right-angle transition type right-angled L shape. In the embodiment of the present disclosure, the shape of the heat insulation dam 5 is consistent with the edge shape of the display portion 1 and the binding portion 2 at the binding corner position A, which can effectively absorb the heat generated by the binding corner position A during cutting, and the heat absorption The effect is better. In the specific implementation, the shape of the heat insulation dam 5 may also adopt a "U" shape or a circular shape or other shapes, which is not limited here.

In specific implementation, as shown in FIGS. 5-9, when the shape of the insulation dam 5 is "L", the insulation dam 5 includes a first side 51 extending in the first direction AB and extending in the second direction CD The second side 52, the first side 51 and the second side 52 each include at least two rows of rectangular small blocks arranged at intervals.

In the first embodiment, as shown in FIG. 6, every two adjacent rows of rectangular blocks on the first side 51 do not overlap in the direction perpendicular to the first direction AB, and each of the rectangular blocks on the second side 52 Two adjacent rows of rectangular small blocks do not overlap in the direction perpendicular to the second direction CD.

In the second embodiment, referring to FIG. 7, each two adjacent rows of rectangular blocks on the first side 51 partially overlap in the direction perpendicular to the first direction AB, and each of the two adjacent rows on the second side 52 Two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction CD.

In the third embodiment, as shown in FIG. 8, each two adjacent rows of rectangular blocks on the first side 51 do not overlap in the direction perpendicular to the first direction AB, and each of the two adjacent rows on the second side 52 Two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction CD.

In the fourth embodiment, referring to FIG. 9, each two adjacent rows of rectangular blocks on the first side 51 partially overlap in the direction perpendicular to the first direction AB, and each of the two adjacent rows on the second side 52 Two adjacent rows of rectangular small blocks do not overlap in the direction perpendicular to the second direction CD.

In the embodiment of the present disclosure, the shape of the heat insulation dam 5 is an "L" shape with an opening facing the cutting edge, which helps to fully absorb the heat generated during the cutting process during the formation of the cutting edge and prevent the heat from spreading to the array substrate 1. In the first embodiment, the thermal insulation dam 5 includes at least two rows of spaced rectangular small blocks, and the thermal insulation dam 5 includes a first side extending in a first direction and a second side extending in a second direction , Where each two adjacent rows of rectangular small blocks on the first side do not overlap in the direction perpendicular to the first direction, and every two adjacent rows of rectangular small blocks on the second side are perpendicular to the second direction There is no overlap in the direction of, the use of spaced rectangular small blocks can play a role in eliminating heat, so as to better prevent heat from spreading inward; in other embodiments, each two adjacent rows of rectangles on the first side The small blocks partially overlap in the direction perpendicular to the first direction, and each two adjacent rows of rectangular small blocks on the second side partially overlap in the direction perpendicular to the second direction; or, on the first side Every two adjacent rows of rectangular small blocks do not overlap in the direction perpendicular to the first direction, and every two adjacent rows of rectangular small blocks on the second side partially overlap in the direction perpendicular to the second direction; or, Every two adjacent rows of rectangular small blocks on the first side partially overlap in the direction perpendicular to the first direction, and every two adjacent rows of rectangular small blocks on the second side are in the direction perpendicular to the second direction No overlap; in these three implementations, there is a situation where two adjacent rows of rectangular small blocks partially overlap in the direction perpendicular to the first direction/second direction. This design is compared with the first In the embodiment, the gap between each row of adjacent rectangular blocks is reduced, and the contact area between the rectangular blocks in contact is increased. Compared with the previous embodiment, this embodiment can also absorb heat Therefore, the heat is prevented from spreading inward, and the fixing between the rectangular pieces in the thermal insulation dam 5 is firmer.

Specifically, the material of the thermal insulation dam 5 is amorphous silicon. In the embodiments of the present disclosure, amorphous silicon has the characteristic of absorbing heat. The heat insulation dam 5 made of amorphous silicon can effectively block the diffusion of heat into the display part during cutting, eliminate the stress caused by thermal influence, and reduce the cutting Cracks are generated near the corners of the edges, thereby reducing the occurrence of poor display of the display panel.

In specific implementation, as shown in FIG. 3, the display part 1 and the binding part 2 are provided with an insulation dam 5 at each binding corner position A of the binding connection; or, as shown in FIG. 10, the display part 1 A plurality of thermal insulation dams 5 are arranged at each binding corner position A of the binding connection with the binding part 2, for example, the display part 1 and the binding part 2 are arranged at each binding corner position A of the binding connection Two insulation dams 5, multiple insulation dams 5 can be arranged side by side at each binding corner position A, the more the number of insulation dams 5, the better the insulation effect, the insulation dam 5 can be adjusted according to the size of the space quantity.

In specific implementation, referring to FIG. 11 and FIG. 12, the display panel includes a crack prevention dam 4 surrounding a first side edge, and the first side edge is the side edge of the display portion 1 except where it is connected with the binding portion 2. In the embodiment of the present disclosure, the display panel includes a crack prevention dam 4 surrounding the first side edge. The crack prevention dam 4 can prevent cracks generated during the cutting process from extending to the display portion 1 when the display device is edge-cut, thereby avoiding The display 1 causes a defect.

Specifically, the display panel may include a base substrate 11 in the area where the display portion is located, the buffer layer 12, the active layer 13, the first insulating layer 14, the second insulating layer 15, and the interlayer which are sequentially located on the base substrate 11. The dielectric layer 16 and the flat layer 17, wherein the anti-crack dam 4 can be formed when the first insulating layer 14, the second insulating layer 15, and the interlayer dielectric layer 16 are formed. That is, the anti-crack dam 4 can include Part of the first insulating layer 14, part of the second insulating layer 15 and part of the interlayer dielectric layer 16 above the active layer 13. In specific implementation, the display device may be provided with a multi-layer anti-cracking dam 4, for example, two layers. There are gaps between different anti-cracking dams 4, and the anti-cracking dam 4 can also be covered with a flat layer 17, and the flat layer 17 can be an organic layer to absorb the stress in the cutting process. The thermal insulation dam 5 may be specifically located on the active layer 13 with a gap between it and the anti-cracking dam 4.

Specifically, at the binding corner position A, the thermal insulation dam 5 is located on the side of the anti-cracking dam 4 away from the display portion 1.

In specific implementation, referring to FIG. 13, the display device includes a flexible circuit board 8; the flexible circuit board 8 is connected to the chip on film 7.

The present disclosure also provides a manufacturing method of the display panel, as shown in FIG. 14, the method includes:

S1: Provide a display panel to be cut, where the display panel to be cut includes a cutting line, an area to be removed on one side of the cutting line, and a reserved area on the other side of the cutting line. The reserved area has a display part, which is defined by one of the display parts. A binding part extending from the side outwards, and a heat insulation dam located at the binding corner of the binding connection between the display part and the binding part;

S2: Cut along the cutting line.

In specific implementation, providing a display panel to be cut includes: forming a heat insulation dam at the binding corner of the display portion and the binding portion. When specifically forming the heat insulation dam, the heat insulation dam may be formed when the back sheet film layer of the display part is made. Specifically, the thermal insulation dam can be formed by a single mask process, or the process of forming the thermal insulation dam can be integrated with other processes, that is, when a patterned film layer in the backplane film is formed, the insulation dam can be formed simultaneously. Thermal dam to simplify the production process.

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

Claims

A display device, including:

A display panel, the display panel having a display portion, and a binding portion extending outward from one side of the display portion, the binding portion having a width perpendicular to the extending direction is smaller than that of the display portion perpendicular to the The width in the extension direction;

A chip on film, the chip on film is bound to the display portion through the binding portion;

The heat insulation dam is located at the binding corner position of the binding connection between the display part and the binding part to absorb heat when the display part and the binding part are edge-cut .
The display device according to claim 1, wherein the shape of the heat insulation dam is consistent with the edge shape of the display portion and the binding portion at the binding corner position.
The display device according to claim 2, wherein the shape of the heat insulation dam is an "L" shape.
The display device according to claim 3, wherein the heat insulation dam comprises a first side extending in a first direction and a second side extending in a second direction, both the first side and the second side It includes at least two rows of rectangular small blocks arranged at intervals.
The display device according to claim 4, wherein each two adjacent rows of rectangular small blocks on the first side do not overlap in the direction perpendicular to the first direction, and on the second side Each two adjacent rows of rectangular small blocks in the direction perpendicular to the second direction do not overlap.
The display device according to claim 4, wherein each two adjacent rows of rectangular small blocks on the first side partially overlap in a direction perpendicular to the first direction, and on the second side Each two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction.
The display device according to claim 4, wherein each two adjacent rows of rectangular small blocks on the first side do not overlap in the direction perpendicular to the first direction, and on the second side Each two adjacent rows of rectangular small blocks partially overlap in a direction perpendicular to the second direction.
The display device according to claim 4, wherein each two adjacent rows of rectangular small blocks on the first side partially overlap in a direction perpendicular to the first direction, and on the second side Each two adjacent rows of rectangular small blocks in the direction perpendicular to the second direction do not overlap.
The display device according to claim 1, wherein the material of the thermal insulation dam is amorphous silicon.
The display device according to claim 1, wherein the heat insulation dam is provided at each binding corner position of the binding connection between the display part and the binding part.
The display device according to claim 1, wherein a plurality of the heat insulation dams are provided at each binding corner position of the binding connection between the display part and the binding part.
The display device according to claim 1, wherein the display panel includes a crack prevention dam surrounding a first side edge, and the first side edge is a part of the display part except for the connection with the binding part. Side edge.
The display device according to claim 12, wherein, at the binding corner position, the heat insulation dam is located on a side of the crack prevention dam away from the display part.
The display device according to claim 1, wherein the display device comprises a flexible circuit board; the flexible circuit board is connected to the chip on film.
A method of manufacturing the display device according to any one of claims 1-14, wherein the method comprises:

A display panel to be cut is provided, wherein the display panel to be cut includes a cutting line, an area to be removed on one side of the cutting line, and a reserved area on the other side of the cutting line, the reserved area having a display portion , A binding part extending outward from one side of the display part, and a heat insulation dam located at the binding corner of the binding connection between the display part and the binding part;

Cut along the cutting line.
15. The manufacturing method of claim 15, wherein said providing a display panel to be cut comprises:

The heat insulation dam is formed at the binding corner position of the display part and the binding part.