WO2016086519A1

WO2016086519A1 - Array substrate and display device

Info

Publication number: WO2016086519A1
Application number: PCT/CN2015/070898
Authority: WO
Inventors: 付延峰
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2014-12-02
Filing date: 2015-01-16
Publication date: 2016-06-09
Also published as: CN104407477A

Abstract

An array substrate and a display device, which solve the technical problem of large width of a border area (20) of an existing liquid crystal display. The array substrate is provided with fan-shaped leads (30). The fan-shaped leads (30) comprise a plurality of wires, and each wire comprises a first metal wire (1). A part of or all the wires comprise second metal wires (3). The whole second metal wires (3) are connected to a part of the first metal wires (1) in parallel. In the fan-shaped leads (30), the length of the second metal wires (3) in the wires at two ends of the fan-shaped leads (30) is larger than the length of the second metal wires (3) in the wires located in the middle of the fan-shaped leads (30).

Description

Array substrate and display device

The present application claims priority to Chinese Patent Application No. CN201410719773.5, filed on Dec.

Technical field

The present invention relates to the field of display technologies, and in particular to an array substrate and a display device.

Background technique

With the development of display technology, liquid crystal displays have become the most common display devices.

In the liquid crystal display, each pixel is controlled by a grid line and a data line which are criss-crossed on the substrate to realize display of an image. The gate driving signal and the data signal are emitted from a control chip in the liquid crystal display, and the gate driving signal and the data signal are generally transmitted to the gate lines and the data lines on the substrate by using a chip on film (Chip On Film, COF for short). .

Specifically, a COF is connected to a gate line or a data line of an ative area through a set of fanouts. A set of fan-shaped leads includes a plurality of wires, because the fan-shaped leads are generally fan-shaped, and the length of the wires at the ends of the fan-shaped leads is greater than the length of the wires in the middle of the fan-shaped leads, so the resistance of the wires at both ends is greater than the resistance of the intermediate wires. Large, the waveform of the gate drive signal or the data signal transmitted on the wires at both ends is seriously distorted, which affects the uniformity of the drive signal.

As shown in FIG. 1 , in the prior art, the middle wires are mostly arranged in an arc shape, so that the lengths of the wires at both ends of the fan-shaped lead wires 30 are closer to the lengths of the wires in the middle, and the wires at the ends of the fan-shaped lead wires 30 and the wires in the middle are The resistance is also closer to improve the uniformity of the drive signal. However, by setting the wires in a bow shape, the wires occupy more space, and the width d of the frame region 20 of the liquid crystal display is increased, which is difficult to meet the current demand for narrow frame products.

Summary of the invention

It is an object of the present invention to provide an array substrate to solve the technical problem that the width of the frame region of the conventional liquid crystal display is large.

The invention provides an array substrate, wherein the array substrate is provided with a fan-shaped lead;

The fan-shaped lead includes a plurality of wires, each of the wires includes a first metal wire, and the partial wire or all of the wires further includes a second metal wire, and the whole of the second metal wire is connected in parallel with a portion of the first metal wire ;

In the sector lead, the length of the second metal line in the wires at both ends of the sector lead is greater than the length of the second metal line in the middle of the sector lead.

Preferably, in the sector lead, the length of the second metal line in each of the plurality of wires gradually decreases from a wire located at both ends of the sector lead to a wire located in the middle of the sector lead.

Preferably, among the wires at both ends of the sector lead, the second metal wire is equal in length to the first metal wire.

Preferably, in the wire in the middle of the sector lead, the length of the second metal wire is zero.

In one implementation, the sector leads are used to transmit gate drive signals.

Further, the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the gate lines are in the same layer, and the second metal lines and the data lines are in the same layer.

In another implementation, the sector leads are used to transmit data signals.

Further, the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the data lines are in the same layer, and the second metal lines and the gate lines are in the same layer.

Preferably, the first metal wire and the second metal wire are electrically connected by a connection electrode.

The present invention also provides a display device comprising a color filter substrate and the above array substrate.

The present invention brings about the following beneficial effects: In the array substrate provided by the present invention, the wires in the sector leads may be composed of the first metal wires and the second metal wires, and the length of the second metal wires is generally smaller than the first metal wires. Connecting the entirety of the second metal line in parallel with a portion of the first metal line reduces the resistance of the wire. The longer the second metal wire is, the longer the portion in parallel with the first metal wire is, and the greater the degree of decrease in the resistance of the wire. In the technical solution provided by the present invention, the length of the second metal line in the wires at both ends of the sector lead is greater than the length of the second metal line in the middle of the fan lead, so the resistance of the wires at both ends is greatly reduced. However, the resistance of the middle wire is reduced to a small extent, so that the resistances of the wires at both ends are closer or even equal to those of the intermediate wires to improve the uniformity of the driving signal. Moreover, each of the wires in the present invention can be arranged in a straight line, thereby reducing the width of the frame region, and can meet the current demand for narrow frame products.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief description of the drawings required in the description of the embodiments will be briefly made below:

1 is a schematic view of a sector lead in a conventional array substrate;

2 is a schematic diagram of a sector lead in an array substrate according to an embodiment of the present invention;

3a to 3c are schematic views respectively showing three kinds of wires of a sector lead in an array substrate according to Embodiment 1 of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the present invention can be applied to the technical problems, and the implementation of the technical effects can be fully understood and implemented. It should be noted that the various embodiments of the present invention and the various features of the various embodiments may be combined with each other, and the technical solutions formed are all within the scope of the present invention.

Embodiment 1:

As shown in FIG. 2, an embodiment of the present invention provides an array substrate including a display area 10 and a frame area 20. A plurality of gate lines and a plurality of data lines (not shown) are disposed in the display area 10, and fan-shaped leads 30 are disposed in the bezel area 20.

A set of fan-shaped leads 30 includes a plurality of wires, each of which includes a first metal wire, and the partial wire or all of the wires further includes a second metal wire. The length of the second metal line is less than or equal to the first metal line, and the entirety of the second metal line is connected in parallel with a part or the whole of the first metal line, so that the resistance of the wire can be reduced. The longer the second metal wire is, the longer the portion in parallel with the first metal wire is, and the greater the degree of decrease in the resistance of the wire.

In a set of sector leads 30, the length of the second metal line in the wires at both ends of the sector lead 30 is greater than the length of the second metal line in the wire located in the middle of the sector lead 30. Therefore, the resistance of the wires located at both ends of the sector lead 30 is greatly reduced, and the resistance of the wires located in the middle of the sector lead 30 is reduced to a small extent, so that the resistance of the wires at both ends is closer to that of the intermediate wires, and even Equal, improving the uniformity of the drive signal. Moreover, each of the wires in the sector lead 30 can be arranged in a straight line, thereby reducing the width d' of the frame region, which can meet the current demand for a narrow frame product.

As a preferred solution, in the wires at both ends of the sector lead, the second metal wire is equal in length to the first metal wire. As shown in FIG. 3a, a first metal line 1, a first insulating layer 2, a second metal line 3, and a second insulating layer 4 are sequentially formed on a base substrate (not shown), in the second metal line. The two ends are connected to the first metal wire 1 through the connection electrode 5 to realize the parallel connection of the second metal wire 3 with the first metal wire 1, thereby minimizing the resistance of the wire.

Meanwhile, in the wire in the middle of the sector lead, the length of the second metal wire is 0 (ie, the second metal wire is not provided). As shown in FIG. 3b, a first metal line 1, a first insulating layer 2, and a second insulating layer 4 are sequentially formed on a base substrate (not shown) without a second metal line to keep the wire The original resistance and keep the minimum length. In other embodiments, a second metal wire having a shorter length may also be disposed in the wire in the middle of the sector lead.

In Figure 3a, the magnitude of the resistance Ra of the wires at the ends of the sector leads can be expressed by:

Where La is the length of the wire at both ends of the sector lead, R1 is the resistance per unit length of the first metal line, and R2 is the resistance per unit length of the second metal line (assuming the cross of the first metal line and the second metal line) The cross-sectional area is equal).

In Figure 3b, the magnitude of the resistance Rb of the wire in the middle of the sector lead can be expressed by:

Rb=Lb·R1

Where Lb is the length of the wire in the middle of the sector lead and R1 is the resistance per unit length of the first metal line.

By setting the second metal wire in the wire at both ends of the fan-shaped lead, Ra=Rb can be obtained by combining the above two formulas:

It can be seen from the above that in the embodiment of the present invention, the wires in the middle of the sector leads are straight lines, and the length thereof is much smaller than the length of the wires at both ends of the sector leads. In the prior art, the length of the arcuate wire in the middle of the sector lead is equal to the length of the wire at both ends of the fan lead. Therefore, compared with the prior art, the embodiment of the present invention can significantly reduce the space occupied by the wires, thereby reducing the width of the frame region of the array substrate, and can meet the current demand for narrow frame products.

Further, in the sector lead, from the wires located at the ends of the fan-shaped leads to the wires located in the middle of the fan-shaped leads, the length of the second metal wires in each of the wires gradually decreases, from the ends of the fan-shaped leads to the middle, each strip The degree of decrease in the resistance of the wire is gradually reduced, so that the resistance values of the wires are closer or even equal to improve the uniformity of the driving signal. Also, each wire can still be set to a straight line to reduce the width of the frame area.

Except for the ends of the fan-shaped lead and the wires in the middle, any one of the wires includes a first metal wire and a second metal wire, and the length of the second metal wire is smaller than the length of the first metal wire. As shown in FIG. 3c, a first metal line 1, a first insulating layer 2, a second metal line 3, and a second insulating layer 4 are sequentially formed on a base substrate (not shown), in the second metal line. The two ends are connected to the first metal wire 1 through the connection electrode 5, so that the whole of the second metal wire 3 is connected in parallel with a portion of the first metal wire 1, so that the resistance values of the respective wires tend to be equal.

The magnitude of the wire resistance Rc depends on the length of the second metal wire, and can be specifically expressed by the following formula:

Where Lc is the length of the wire, L2 is the length of the second wire in the wire, R1 is the resistance per unit length of the first wire, and R2 is the resistance per unit length of the second wire.

According to the condition to be satisfied Rc=Ra=Rb, the appropriate length of the second metal wire can be derived, so that the resistance values of the wires in the sector lead are equal.

In addition, the technical solutions provided by the embodiments of the present invention may also be combined with the prior art as appropriate. Under the premise that the width of the frame area is not increased too much, a part of the wires of the middle portion of the sector lead may be arcuate to increase the resistance of the wires and improve the uniformity of the driving signal.

In the above implementation manners of the embodiment, the sector leads for transmitting the gate driving signals are taken as an example for description. As a preferred solution, as shown in FIG. 3a, FIG. 3b, and FIG. 3c, the first metal line 1 and the gate line 6 are located in the same layer, and the second metal line 3 is located on the same layer as the data line (not shown). . Thus, on the array substrate, the connection line 7 (connected between the sector lead and the COF), the first metal line 1, and the gate line 6 can form an integrated structure in the same patterning process, thereby improving the transmission of the gate driving signal. quality.

Embodiment 2:

This embodiment is basically the same as the first embodiment except that the sector lead is used to transmit data signals in this embodiment. Moreover, the first metal line and the data line are in the same layer, and the second metal line and the gate line are in the same layer.

Thus, on the array substrate, the connection lines (connected between the sector leads and the COF), the first metal lines, and the data lines can form an integrated structure in the same patterning process, thereby improving the transmission quality of the data signals.

It should be noted that the first embodiment and the second embodiment can also be combined with each other and realized at the same time. That is, in an array substrate, the sector leads for transmitting the gate driving signals are arranged in the manner of the first embodiment; the sector leads for transmitting the data signals are arranged in the manner of the second embodiment.

Embodiment 3:

Embodiments of the present invention provide a display device, which may be a liquid crystal television, a liquid crystal display, a mobile phone, a tablet computer, or the like. The display device includes a color film substrate and the array substrate provided in the above embodiments.

Since the display device provided by the embodiment of the present invention has the same technical features as the array substrate provided in the above embodiment, the same technical problem can be solved and the same technical effect can be achieved.

While the embodiments of the present invention have been described above, the described embodiments are merely illustrative of the embodiments of the invention and are not intended to limit the invention. Any modification and variation of the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. It is still subject to the scope defined by the appended claims.

Claims

An array substrate, wherein the array substrate is provided with a fan-shaped lead;

The fan-shaped lead includes a plurality of wires, each of the wires includes a first metal wire, and the partial wire or all of the wires further includes a second metal wire, and the whole of the second metal wire is connected in parallel with a portion of the first metal wire ;

In the sector lead, the length of the second metal line in the wires at both ends of the sector lead is greater than the length of the second metal line in the middle of the sector lead.
The array substrate according to claim 1, wherein in said sector lead, a length of a second metal line among each of said wires is from a wire located at both ends of said sector lead to a wire located in the middle of said sector lead slowing shrieking.
The array substrate according to claim 1, wherein among the wires at both ends of the sector lead, the second metal wire is equal in length to the first metal wire.
The array substrate according to claim 1, wherein a length of the second metal wire is 0 in a wire in the middle of the sector lead.
The array substrate of claim 1 wherein said sector leads are for transmitting gate drive signals.
The array substrate according to claim 5, wherein the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the gate lines are in the same layer, and the second metal lines Located on the same layer as the data line.
The array substrate according to claim 6, wherein the first metal wire and the second metal wire are electrically connected by a connection electrode.
The array substrate of claim 1 wherein said sector leads are for transmitting data signals.
The array substrate according to claim 8, wherein the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the data lines are in the same layer, and the second metal lines Located in the same layer as the gate line.
The array substrate according to claim 9, wherein the first metal wire and the second metal wire are electrically connected by a connection electrode.
A display device comprising a color film substrate and an array substrate;

The array substrate is provided with a fan-shaped lead;

The fan-shaped lead includes a plurality of wires, each of the wires includes a first metal wire, and the partial wire or all of the wires further includes a second metal wire, and the whole of the second metal wire is connected in parallel with a portion of the first metal wire ;

In the sector lead, the length of the second metal line in the wires at both ends of the sector lead is greater than the length of the second metal line in the middle of the sector lead.
A display device according to claim 11, wherein in said sector lead, a length of a second metal line among each of said wires is from a wire located at both ends of said sector lead to a wire located in the middle of said sector lead slowing shrieking.
The display device according to claim 11, wherein among the wires at both ends of the sector lead, the second metal wire is equal in length to the first metal wire.
The display device according to claim 11, wherein a length of the second metal wire is 0 in a wire located in the middle of the sector lead.
The display device of claim 11, wherein the sector lead is for transmitting a gate drive signal.
The display device as claimed in claim 15 , wherein the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the gate lines are in the same layer, and the second metal lines Located on the same layer as the data line.
The display device of claim 16, wherein the first metal line and the second metal line are electrically connected by a connection electrode.
The display device of claim 11, wherein the sector leads are used to transmit data signals.
The display device as claimed in claim 18, wherein the array substrate is further provided with a plurality of gate lines and a plurality of data lines, wherein the first metal lines and the data lines are in the same layer, and the second metal lines Located in the same layer as the gate line.
The display device according to claim 19, wherein said first metal line and said second metal line are electrically connected by a connection electrode.