WO2020199518A1

WO2020199518A1 - Display panel and fabrication method therefor

Info

Publication number: WO2020199518A1
Application number: PCT/CN2019/106377
Authority: WO
Inventors: 程薇
Original assignee: 武汉华星光电技术有限公司
Priority date: 2019-03-29
Filing date: 2019-09-18
Publication date: 2020-10-08
Also published as: CN110109297A; CN110109297B

Abstract

Disclosed are a display panel and a fabrication method therefor. A frame area (100a) of an array substrate (10) is provided with a bonding area (100a') and a notch (100c), the notch (100c) and the bonding area (100a') are arranged side by side in the length direction of the same side of the frame area (100a), and a flexible thin film (40) is bonded to the bonding area (100a') and passes through the notch (100c) so as to be bent to a back face of a display panel, such that the yield of bonding between the flexible thin film (40) and the array substrate (10) is improved while the display panel is free of a frame.

Description

Display panel and manufacturing method thereof

Technical field

This application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof.

Background technique

Liquid Crystal Display (LCD) and Active Matrix Light Emitting Display (AMOLED) industries are changing with each passing day. Various display technologies are filling the market, and major high-tech material vendors in the industry have also proposed more and more New technologies to be developed and under development.

At present, users are not only pursuing a higher screen-to-body ratio in order to get a better user experience, a more novel appearance and a longer battery life. In the pursuit of full-screen and completely borderless display designs, major mobile phone manufacturers have proposed narrow bezel designs, and even visual bezel-less designs. In reducing the size of the left and right borders of the display, from the 2014 Liquid Crystal Module (LCM) border width of 1.0mm to the current LCD module border of 0.5mm, it has been greatly improved; SumSung edge series mobile phones Through the special design of the left and right edges to achieve a visual borderless effect, the upper and lower borders of the mobile phone still cannot achieve a borderless design.

As shown in FIG. 1, the side bonding technology binds the flip chip film 40 to the side surfaces of the array substrate 10 and the color film substrate 20, and the output pins on the flip chip film 40 are connected to the metal wires on the array substrate 10. 12 Contacting in the direction of the thickness of the metal wire 12 (about 3000 angstroms) to reduce the lower frame is an effective way to achieve a narrow frame. However, for high-resolution mobile phones, the traditional side bonding technology is due to the low-temperature polysilicon (Low Temperature Poly Silicon (LTPS) requires high resolution, fine line width, and high precision. When side bonding is used, there is a risk of poor contact and bonding failure.

Therefore, it is necessary to propose a technical solution to realize the narrow frame of the display while ensuring the bonding yield of the flip chip film.

technical problem

The purpose of the present application is to provide a display panel and a manufacturing method thereof. The display panel has no frame and has a high binding yield between the flexible film and the display panel.

Technical solutions

A display panel, the display panel comprising:

An array substrate, the array substrate has a display area and a frame area surrounding the periphery of the display area, the frame area is provided with a binding area, the array substrate has a gap, and the gap is provided in the frame area , The gap and the binding area are arranged side by side along the length direction of the same side of the frame area;

A flexible film, the flexible film being bound to the binding area and passing through the gap to be bent to a side of the array substrate away from the display area.

In the above display panel, the first plane of the notch close to the binding area is an arc-shaped surface.

In the above display panel, the flexible film includes an input portion and a main body connected to the input portion, and the input portion is bound to the binding area and passes through the gap so that the main body is located in the The side of the array substrate away from the display area.

In the above display panel, the length of the notch along the width direction of the frame area is greater than the length of the input portion of the flexible film bound on the array substrate along the width direction of the frame area.

In the above display panel, the display panel further includes a sealant and a color filter substrate, the color filter substrate is disposed opposite to the array substrate, and the sealant is located in the frame area and located at all sides of the binding area. On the flexible film, the sealant connects the color filter substrate and the array substrate.

In the above display panel, the ratio of the length of the notch along the width direction of the frame area to the width of the frame area ranges from 1/6 to 1/5.

In the above display panel, the flexible film is a chip on film or a flexible printed circuit board.

In the above display panel, the notch is a rectangular notch.

A manufacturing method of a display panel, the manufacturing method includes the following steps:

Providing an array substrate and a flexible film, the array substrate having a display area and a frame area surrounding the periphery of the display area, and a binding area is provided in the frame area;

Forming a gap in the frame area of the array substrate, the gap is disposed in the frame area, and the gap and the binding area are arranged side by side along the length direction of the same side of the frame area;

The flexible film is bound to the binding area and passes through the gap to be bent to a side of the array substrate away from the display area.

In the above manufacturing method of the display panel, the first plane of the notch close to the binding area is an arc-shaped surface.

In the above manufacturing method of the display panel, the binding the flexible film to the binding area and passing through the gap to bend to the side of the array substrate away from the display area includes the following steps:

The input portion is bound to the binding area and passes through the gap so that the main body portion is located on the side of the array substrate away from the display area, and the flexible film includes the input portion and the input portion The main part of the connection.

In the above manufacturing method of the display panel, the length of the notch in the width direction of the frame area is greater than the length of the input portion of the flexible film bound on the array substrate in the width direction of the frame area.

In the above manufacturing method of the display panel, the manufacturing method further includes the following steps:

Forming sealant on the frame area and the flexible film in the frame area;

The color filter substrate is placed on the sealant so that the color filter substrate is opposite to the array substrate.

In the above manufacturing method of the display panel, the ratio of the length of the notch along the width direction of the frame area to the width of the frame area ranges from 1/6 to 1/5.

In the above manufacturing method of the display panel, the flexible film is a chip on film or a flexible printed circuit board.

In the above manufacturing method of the display panel, the notch is a rectangular notch.

Beneficial effect

The present application provides a display panel and a manufacturing method thereof. By providing a binding area and a gap in the frame area of an array substrate, the gap and the binding area are arranged side by side along the length direction of the same side of the frame area, and the flexible film is bound to the binding area And through the gap to bend to the back of the display panel, the display panel is frameless, and the bonding yield of the flexible film and the array substrate is improved.

Description of the drawings

FIG. 1 is a schematic diagram of the flip chip film being bound to the side of the display panel in the conventional technology;

2 is a schematic diagram of a first structure of a display panel according to an embodiment of the application;

3 is a top view of the array substrate of the display panel shown in FIG. 2;

4 is a schematic diagram of a flexible film on the array substrate shown in FIG. 3;

FIG. 5 is a schematic diagram of a second structure of a display panel according to an embodiment of the application;

FIG. 6 is a flowchart of a manufacturing method of a display panel according to an embodiment of the application.

Attached drawings:

10 array substrate; 20 color film substrate; 30 sealant; 40 flip chip film, flexible film;

12 metal wire; 100b display area; 100a frame area; 100a' binding area; 11 input pins; 100c notch; 41 input part; 42 main body part; 43 driver chip; 101 first plane.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of this application.

Please refer to FIG. 2, FIG. 3 and FIG. 4. FIG. 2 is a schematic diagram of the first structure of the display panel according to the embodiment of the application. FIG. 3 is a top view of the array substrate of the display panel shown in FIG. 2, and FIG. 4 is the array shown in FIG. Schematic diagram of the flexible film on the substrate. The display panel includes an array substrate 10, a color filter substrate 20, a sealant 30 and a flexible film 40.

The array substrate 10 has a display area 100b and a frame area 100a surrounding the periphery of the display area 100b. The display area 100b is provided with scan lines and data lines, and a pixel unit is provided in an area where two adjacent scan lines and two adjacent data lines intersect vertically, and the pixel unit includes a thin film transistor. The frame area 100 a is a rectangular ring-shaped area, and the frame area 100 a is used for coating the sealant 30 to connect the array substrate 10 and the color filter substrate 20. The border area 100a is provided with a bonding area 100a', the data line and peripheral wiring extend to the bonding area 100a', and the bonding area 100a' is provided with an input pin 11, and the gate control signal is output to Peripheral wiring, the peripheral wiring transmits it to the scan driving circuit (not shown), the scan driving circuit outputs a scan signal to control the turn-on of the thin film transistor; the data signal is input through the input pin 11 and is transmitted to the data line, and the data line passes through the film The transistor writes the data signal into the pixel unit.

The array substrate 10 has a notch 100c. The notch 100c is disposed in the frame area 100a. The notch 100c and the binding area 100a' are arranged side by side along the length direction of the same side of the frame area 100a (including the length direction of the long side and the length direction of the short side of the frame area). . Specifically, the notch 100c and the binding area 100a' are both arranged side by side along the same side with the short length of the frame area 100a. It can be understood that the notch 100c and the binding area 100a' can both be arranged side by side along the same side of the frame area 100a. The ratio of the length d1 of the notch 100c along the width direction of the frame area 100a to the width d2 of the frame area 100a ranges from 1/6 to 1/5. The notch 100c is a rectangular notch, and the ratio of the length d1 of the notch 100c in the width direction of the border area 100a to the width d2 of the border area 100a is 1/5, so that the peripheral wiring extends to the inclined section of the binding area 100a' and the data line extends to the binding The fan-shaped traces in the fixed area have enough wiring space in the width direction of the frame area 100a.

The flexible film 40 may be a chip on film or a flexible printed circuit board. The flexible film 40 includes an input part 41 and a main body 42 connected to the input part 41. The input part 41 is bound to the binding area 100a' and passes through the gap 100c so that the main body 42 is located on the side of the array substrate 10 away from the display area 100b . When the input portion 41 is bound to the binding area 100a', the side of the input portion 41 away from the display area 100b is located in the binding area 100a', or flush with the edge of the array substrate 10, that is, the side of the input portion 41 away from the display 100b The edge will not be located outside the edge of the array substrate 10. After the main body 42 is bent to the back of the array substrate 10, the main body 42 will not extend beyond the edge of the array substrate 10, so that the display panel is frameless. Specifically, the length of the notch 100c in the width direction of the frame area 100a is greater than the length of the input portion 41 of the flexible film 40 bound on the array substrate 10 in the width direction of the frame area 100a.

In addition, due to the large contact area between the input portion 41 and the input pins of the binding area 100a', the yield rate of the flexible film 40 binding on the display panel is improved. The flexible film 40 further includes a driving chip 43 which is disposed on the main body 42.

The sealant 30 is located in the frame area 100a and on the flexible film 40 in the binding area 100a'. The sealant 30 is connected to the color filter substrate 20 and the array substrate 10. The sealant 30 is an insulating gel.

Please refer to FIG. 5, which is a schematic diagram of the second structure of the display panel according to the embodiment of the application, which is basically similar to the display panel shown in FIG. 2, except that the first plane 101 where the notch 100c is close to the binding area 100a' is Curved surface, so that the bending radian of the input portion 41 is slowly changed during the bending process, so as to prevent the circuit on the input portion 41 from being broken due to bending.

The display panel of the embodiment of the present application provides a binding area and a gap in the frame area of the array substrate. The binding area and the gap are arranged side by side along the length direction of the same side of the frame area. The flexible film is bound to the binding area and passes through the gap to bend. Folding to the back of the display panel makes the display panel frameless and improves the bonding yield of the flexible film and the array substrate.

Please refer to FIG. 6, which is a flowchart of a manufacturing method of a display panel according to an embodiment of the application. The manufacturing method of the display panel includes the following steps:

S10: Provide an array substrate and a flexible film.

The array substrate has a display area and a frame area surrounding the periphery of the display area, and a binding area is arranged in the frame area.

The flexible film includes an input part and a main body connected to the input part.

S11: A gap is formed in the frame area of the array substrate.

Specifically, a notch is formed by cutting and digging a hole on the array substrate, the notch is arranged in the frame area, and the notch and the binding area are arranged side by side along the length direction of the same side of the frame area.

S12: bind the flexible film to the binding area and pass through the gap to be bent to the side of the array substrate away from the display.

Specifically, the input part is bound to the binding area and passes through the gap so that the main body part is located on the side of the array substrate away from the display area.

Further, the first plane of the notch close to the binding area is an arc-shaped surface so that the bending curvature of the input part is slowly changed during the bending process, so as to avoid the circuit on the input part from being broken due to bending.

Further, after step S12, the manufacturing method further includes the following steps: forming sealant on the frame area and the flexible film in the frame area, and disposing the color filter substrate on the rubber frame so that the color filter substrate and the array substrate are disposed oppositely. After the color film substrate and the array substrate are assembled, the assembly of the flexible film is completed, including the installation of a driver chip and other devices on the main body of the flexible film.

Further, the ratio of the length of the gap in the width direction of the frame to the width of the frame ranges from 1/6 to 1/5, so that the peripheral wiring extends to the inclined section of the binding area 100a' and the data line extends to the binding area The fan-shaped traces have sufficient wiring space in the width direction of the frame area 100a.

The manufacturing method of the display panel of the embodiment of the present application provides a binding area and a gap in the frame area of the array substrate. The gap and the binding area are arranged side by side along the length direction of the same side of the frame area. The flexible film is bound to the binding area and passes through the gap. By bending to the back of the display panel, the display panel is frameless while ensuring the bonding yield of the flexible film and the array substrate.

The descriptions of the above embodiments are only used to help understand the technical solutions and core ideas of this application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or modify some of the technologies. The features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

A display panel, wherein the display panel includes:

An array substrate, the array substrate has a display area and a frame area surrounding the periphery of the display area, a binding area is arranged in the frame area, and the array substrate has a notch,

The gap is arranged in the frame area, and the gap and the binding area are arranged side by side along the length direction of the same side of the frame area;

A flexible film, the flexible film being bound to the binding area and passing through the gap to be bent to a side of the array substrate away from the display area.
The display panel of claim 1, wherein the first plane of the notch close to the binding area is an arc-shaped surface.
The display panel according to claim 1, wherein the flexible film comprises an input part and a main body part connected to the input part, the input part being bound to the binding area and passing through the gap to The main body is located on the side of the array substrate away from the display area.
3. The display panel of claim 3, wherein the length of the notch along the width direction of the frame area is greater than that of the input portion of the flexible film bound on the array substrate along the width direction of the frame area length.
The display panel according to claim 1, wherein the display panel further comprises a sealant and a color filter substrate, the color filter substrate is disposed opposite to the array substrate, and the sealant is located in the frame area and located at all On the flexible film in the binding area, the sealant connects the color filter substrate and the array substrate.
The display panel of claim 1, wherein the ratio of the length of the notch in the width direction of the frame area to the width of the frame area ranges from 1/6 to 1/5.
The display panel of claim 1, wherein the flexible film is a chip on film or a flexible printed circuit board.
The display panel of claim 1, wherein the notch is a rectangular notch.
A manufacturing method of a display panel, wherein the manufacturing method includes the following steps:

Providing an array substrate and a flexible film, the array substrate having a display area and a frame area surrounding the periphery of the display area, and a binding area is provided in the frame area;

Forming a gap in the frame area of the array substrate, the gap is disposed in the frame area, and the gap and the binding area are arranged side by side along the length direction of the same side of the frame area;

The flexible film is bound to the binding area and passes through the gap to be bent to a side of the array substrate away from the display area.
9. The manufacturing method of the display panel according to claim 9, wherein the first plane of the notch close to the binding area is an arc-shaped surface.
9. The method of manufacturing a display panel according to claim 9, wherein the flexible film is bound to the binding area and passes through the gap to be bent to a portion of the array substrate away from the display area One side includes the following steps:

The input portion is bound to the binding area and passes through the gap so that the main body portion is located on the side of the array substrate away from the display area, and the flexible film includes the input portion and the input portion The main part of the connection.
The method for manufacturing a display panel according to claim 11, wherein the length of the notch along the width direction of the frame area is greater than that of the input portion of the flexible film bound on the array substrate along the frame. The length of the zone width direction.
The method of manufacturing a display panel according to claim 9, wherein the method of manufacturing further comprises the following steps:

Forming sealant on the frame area and the flexible film in the frame area;

The color filter substrate is placed on the sealant so that the color filter substrate is opposite to the array substrate.
9. The manufacturing method of the display panel according to claim 9, wherein the ratio of the length of the notch in the width direction of the frame area to the width of the frame area ranges from 1/6 to 1/5.
9. The method for manufacturing a display panel according to claim 9, wherein the flexible film is a chip on film or a flexible printed circuit board.
9. The method of manufacturing a display panel according to claim 9, wherein the notch is a rectangular notch.