WO2020073384A1

WO2020073384A1 - Liquid crystal display panel

Info

Publication number: WO2020073384A1
Application number: PCT/CN2018/113355
Authority: WO
Inventors: 陈黎暄; 陈孝贤
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2018-10-08
Filing date: 2018-11-01
Publication date: 2020-04-16
Also published as: CN109270757A

Abstract

Disclosed is a liquid crystal display panel, comprising: an array substrate on which a plurality of metal wires is distributed, the metal wires comprising transverse and longitudinal metal wires, and the transverse and longitudinal metal wires having at least one junction area; and further comprising a color film substrate opposite to the array substrate and comprising a filter layer, the filter layer comprising a color filter and a first black matrix distributed around the color filter, the color filter comprising a plurality of color filter units arranged in a matrix, and each color filter unit comprising at least one corner. The liquid crystal display panel of the present invention effectively solves the light leakage problem in the prior art caused by limited metal wire process.

Description

LCD panel

Technical field

The invention relates to the field of display technology, in particular to a liquid crystal display panel.

Background technique

With the development of high technology, video products, especially digital video or video devices have become common products in ordinary life. In these digital video or video devices, the display is an important component used to display related information. The user can read the information from the display to control the operation of the device.

As the main element of the liquid crystal display, the liquid crystal display panel mainly includes a color filter substrate, an array substrate, and a polarizing plate. A transparent electrode is provided on the opposite inner side of the color filter substrate and the array substrate, and a layer of liquid crystal molecules is provided between the color filter substrate and the array substrate. The liquid crystal display panel changes the polarization state of light by controlling the orientation of liquid crystal molecules by an electric field, and realizes the purpose of display by using a polarizing plate to penetrate and block light.

Liquid crystal display (LCD) is a type of display used in digital clocks and many portable computers. The LCD display uses two pieces of polarized material with a liquid crystal solution between them. When electric current passes through the liquid, the crystals are rearranged so that light cannot pass through them. Therefore, each crystal is like a blind, allowing both light to pass through and block light.

technical problem

The technical problem mainly solved by the present invention is to provide a liquid crystal display panel to solve the light leakage problem caused by the non-horizontal / vertical structure of the metal wiring in the actual manufacturing process in the prior art.

Technical solution

The present invention provides an array substrate. A plurality of metal traces are distributed on the array substrate. The metal traces include lateral metal traces and longitudinal metal traces. The lateral metal traces and the lateral metal traces have at least one intersection area. A color filter substrate, which is disposed opposite to the array substrate; the color filter substrate includes a color filter, having a plurality of color filter units arranged in a matrix, each color filter unit includes at least one corner; each of the The intersection area corresponds to at least one of the corners, and the corners are formed with a notch concaved to the color filter unit; a black matrix, including a first black matrix, distributed around the color filter; a second black matrix, distributed at Between the color filter units; Black bumps, covered by the notch; the forward projection of the metal trace on the color filter substrate completely falls on the first black matrix; or the metal trace on the color filter substrate The forward projection above completely falls on the first black matrix and the second black matrix.

Further, the lateral metal traces include a plurality of first metal traces, the first metal traces correspond to the second black matrix, and all the first metal traces are arranged side by side.

Further, the longitudinal metal traces include a plurality of second metal traces, the second metal traces correspond to the second black matrix, and all the second metal traces are arranged side by side.

Further, the lateral metal trace includes a third metal trace, and the third metal trace corresponds to the first black matrix.

Further, the longitudinal metal trace includes a fourth metal trace, which is vertically connected to the third metal trace, and the fourth metal trace corresponds to the first black matrix.

Further, the diameter or side length of the black protrusion is less than or equal to 10um.

Further, the notch is a square notch, and the forward projection of the color filter substrate completely falls on the corresponding protrusion.

Further, the liquid crystal display panel is an ultra high definition or full high definition liquid crystal display panel.

Beneficial effect

The liquid crystal display screen of the present invention uses a black matrix for shading and shading. Corresponding notches are opened at the corners of the color filter unit. These notches are provided with corresponding black protrusions. The black protrusions are used for shading, while avoiding the metal at the corners. Similar to the "diffraction" phenomenon caused by the wiring, and the design of the notch can maximize the retention of the light-transmitting area. At the same time, the horizontal metal wiring or vertical metal wiring in the corresponding area of the color filter can be removed to save material, and It can simplify the process steps and improve the control accuracy of the process.

BRIEF DESCRIPTION

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

FIG. 1 is a layer structure diagram of an array substrate in an embodiment.

2 is a schematic side view of a color filter substrate in an embodiment.

3 is a schematic view of the distribution of part of the color filter units of the color filter in Example 1. FIG.

FIG. 4 is a diagram showing the correspondence between the metal trace corresponding to FIG. 3 and the first black matrix in Embodiment 1. FIG.

5 is a schematic diagram of the distribution of part of the color filter units of the color filter in Example 2. FIG.

6 is a diagram of the correspondence between the metal trace corresponding to FIG. 5 and the second black matrix in Embodiment 2. FIG.

7 is a schematic diagram of the distribution of part of the color filter units of the color filter in Example 3. FIG.

8 is a diagram of a correspondence between the metal trace corresponding to FIG. 7 and the second black matrix in Embodiment 3. FIG.

The parts in the drawing are marked as:

1 Array substrate; 2 Color film substrate;

11 Metal wiring; 111 horizontal metal wiring;

112 Longitudinal metal wiring; 1111 First metal wiring;

1112 Third metal wiring; 1121 Second metal wiring;

1122 Fourth metal trace;

21 glass substrate; 22 black matrix;

23 color filters; 24 conductive film;

25 Protective film; 26 filter layer;

231 gap; 232 color filter unit;

233 gap;

221 black bulge; 222 The first black matrix;

223 Second black matrix;

Best Mode of the Invention

The descriptions of the following embodiments refer to the attached drawings to illustrate specific embodiments of the present invention that can be implemented. Directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., only refer to the attached drawings direction. Therefore, the directional terminology is used to illustrate and understand the present invention, not to limit the present invention.

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 should be included in the scope of protection of the present invention Inside.

Example 1

This example is the most simplified one. The details are as follows.

As shown in FIG. 1, in order to effectively solve the light leakage problem of the liquid crystal display panel, this embodiment provides a liquid crystal display panel, which includes an array substrate 1 and a color filter substrate 2 disposed oppositely.

The array substrate 1 is distributed with metal traces 11 and thin film transistors (not shown). As shown in FIG. 8, the metal trace 11 includes a horizontal metal trace 111 and a vertical metal trace 112. Wherein, the horizontal metal trace 111 and the vertical metal trace 112 are vertically connected, and the connection point is an intersection.

As shown in FIG. 2, the color filter substrate 2 includes a glass substrate 21 and a filter layer 26. The filter layer 26 is disposed on the glass substrate 21. The filter layer 26 includes a color filter 23 and a first black matrix 222 distributed around the color filter. Generally, the first black matrix 222 has a block shape, and is used to block the light around the color filter 23. The color filter 23 includes color filter units 232 arranged in a matrix, and there are gaps 233 between the color filter units 232, the gaps 233 are provided with a second black matrix 223 for shading, each of the color filter units 232 includes at least one corner.

As shown in FIG. 3, it is the most common color filter unit 232, and its projection shape on the glass substrate 21 is a rectangle. Therefore, each corner of the color filter unit 232 should include four. As shown in FIG. 4, FIG. 4 is a corresponding diagram of the first black matrix 222 and the metal trace 11. Corresponding metal traces 11 are provided at corresponding positions of the first black matrix 222, wherein the lateral metal traces 111 include third metal traces 1112, and the vertical metal traces 112 include fourth metal traces 1122, so that each The thin film transistor corresponding to the color filter unit 232 can be connected to the metal trace 11, and the metal trace 11 corresponding to the first black matrix 222 is the fourth metal trace 1122 and the third metal trace 1112 that are perpendicularly connected to each other The connection between the fourth metal trace 1122 and the third metal trace 1112 is a junction. The color filter 23 is a rectangular area, and this area has corners. As described in the background art, in the actual process, since the accuracy or control accuracy of the metal trace 11 is not in the process of being formed, it is not It is a perfect straight line, which makes the metal traces distributed horizontally and vertically staggered in the corresponding gap area into a non-straight state. Therefore, there is a tiny gap between the intersection of the two vertically connected metal traces 11 and the color filter 23. Under the effect of polarized light, the light will have a diffraction-like effect, causing the light to leak through the gap, especially The light leakage phenomenon is particularly serious at the intersection of two vertically connected metal traces, that is, at the corners of the color filter unit.

This embodiment focuses on improving the problem of light leakage at the corners of the periphery of the color filter 23. However, these metal traces 11 cannot be removed due to the manufacturing process. Among these metal traces, the lateral metal traces 111 include third metal traces 1112, and the vertical metal traces 112 include fourth metal traces 1122. The second metal trace 1112 and the fourth metal trace 1122 are perpendicularly connected to each other, and the connection is the intersection of the metal traces. These intersections correspond to the corners one by one. At these corners, a notch 231 concaved to the color unit corresponding to the corner is provided. The notches 231 are covered by black protrusions 221. Due to the existence of the first black matrix 222, the projections of the third metal traces 1112 and the fourth metal traces 1122 on the glass substrate 21 fall on the first black matrix 222 .

In order to further satisfy the process accuracy requirements of the notch, in Examples 1 and 2, the notch forms a square notch during negative exposure. In the MACK manufacturing process, the black protrusions 221 and the first black matrix 222 are integrally formed. The forward projection of the light-transmitting notch on the glass substrate completely falls into the black protrusion 221, so that the black protrusion 221 completely blocks the light-transmitting notch, and at the same time, the optical compensation effect can be used to make the diameter of the black protrusion 221 finally generated Or the side length is less than or equal to 10um, and the light-transmitting area of the color filter 23 is retained to the greatest extent.

Example 2

Based on the solution of Embodiment 1, in order to adapt the light leakage solution of this embodiment to the requirements of the TFT substrate, in the actual manufacturing process, there must be at least one metal walkway corresponding to the gap between the color filter units 232 The line 11 is used to connect the pixel electrode, so that the thin film diode corresponding to the color filter unit 232 is energized. However, in order to prevent the metal traces 11 in this area from crossing each other and producing a similar "diffraction" phenomenon, in Example 1, as shown in FIG. 6, the lateral metal traces 11 include the first metal traces 1111 and the longitudinal metal traces The line 112 includes second metal traces 1121, and the first metal traces 1111 and the second metal traces 1121 are staggered with each other. At this time, at least one of the first metal traces 1111 and its corresponding second metal trace 1121 must be vertically connected, and at least one of the second metal traces 1121 and its corresponding third metal trace 1112 must be vertically connected. , The same at least one first metal trace 1111 and its corresponding fourth metal trace 1122 must be vertically connected. Therefore, all corners corresponding to the intersection of two metal traces 11 are provided with a concave notch 231, and in The notch 231 is provided with a black protrusion 221 to cover the notch, as shown in FIG. 5. Similarly, the black protrusions 221 can be integrated with the notches in the MACK process, and the black protrusions 221 and the second black matrix 223 are integrally provided.

Example 3

In order to prevent the metal traces 11 in this area from crossing each other and produce a similar "diffraction" phenomenon, and in order to save materials and reduce the loss of light transmittance, on the basis of Example 2, the lateral metal corresponding to the second black matrix 223 area is deleted The trace 111 or the vertical metal trace 112, that is, in this embodiment, these metal traces only include the horizontal metal trace 111 or the vertical metal trace 112. Then these horizontal metal traces 111 or vertical metal traces 112 must be arranged side by side without intersecting regions. Therefore, there is no similar "diffraction" phenomenon caused by the intersection of metal traces in the area between the color filter units 232 Therefore, it is not necessary to provide notches 231 at the corners of these color filter units 232. It is only necessary to provide a gap 231 in the intersection area of other corresponding metal traces.

As shown in FIG. 8, that is, in this embodiment, the lateral metal trace 111 includes a first metal trace 1111, and the first metal traces 1111 are arranged side by side. Or the longitudinal metal trace 112 includes a second metal trace 1121, and the second metal traces 1121 are arranged side by side. In this embodiment, only the first metal trace 1111 is used as an example for description, that is, the first metal trace 1111 and the fourth metal trace 1122 must be vertically connected. Therefore, any corner corresponding to the intersection of the two metal traces 11 Each is provided with a concave recess, as shown in FIG. 7. A black protrusion 221 for covering the gap is provided at the gap. Similarly, the black protrusions 221 can be integrated with the notches in the MACK process, and the black protrusions 221 and the second black matrix 223 are integrally provided.

The liquid crystal display panel of the present invention may be an ultra high definition or full high definition liquid crystal display panel.

It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the departure of the present invention, but the present invention is not limited thereto, and for those skilled in the art, without departing from the spirit of the present invention In the substantial case, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

A liquid crystal display panel, which includes

An array substrate, a plurality of metal traces are distributed on the array substrate, the metal traces include a lateral metal trace and a vertical metal trace, and the lateral metal trace and the lateral metal trace have at least one intersection area;

The color film substrate is arranged opposite to the array substrate;

The color filter substrate includes

The color filter has a plurality of color filter units arranged in a matrix, and each color filter unit includes at least one corner; each of the intersection areas corresponds to at least the corner, and the corner forms an indentation The gap of the color filter unit;

Black matrix including

The first black matrix is distributed around the color filter;

A second black matrix distributed between the color filter units;

Black bumps, covered in the gap;

The forward projection of the metal trace on the color filter substrate completely falls on the first black matrix; or

The forward projection of the metal trace on the color filter substrate completely falls on the first black matrix and the second black matrix.
The liquid crystal display panel of claim 1, wherein the lateral metal traces include a plurality of first metal traces, the first metal traces correspond to the second black matrix, and all the first metal traces Arranged side by side.
The liquid crystal display panel according to claim 1, wherein the longitudinal metal traces include a plurality of second metal traces, the second metal traces correspond to the second black matrix, and all the second metal traces Arranged side by side.
The liquid crystal display panel of claim 1, wherein the lateral metal traces include third metal traces, the third metal traces corresponding to the first black matrix.
The liquid crystal display panel of claim 4, wherein the vertical metal traces include fourth metal traces, which are vertically connected to the third metal traces, and the fourth metal traces correspond to the first Black matrix.
The liquid crystal display panel according to claim 1, wherein the black protrusion has a diameter of 10 μm or less.
The liquid crystal display panel of claim 1, wherein the black protrusion has a side length of 10um or less.
The liquid crystal display panel of claim 1, wherein the notch is a square notch.
8. The liquid crystal display panel according to claim 8, wherein the notch completely falls on the corresponding protrusion on the forward projection of the color filter substrate.
The liquid crystal display panel of claim 1, wherein the liquid crystal display panel is an ultra high definition or full high definition liquid crystal display panel.