WO2020087649A1

WO2020087649A1 - Colour film substrate, liquid crystal display panel and liquid crystal display device

Info

Publication number: WO2020087649A1
Application number: PCT/CN2018/119135
Authority: WO
Inventors: 吴川
Original assignee: 惠科股份有限公司
Priority date: 2018-10-29
Filing date: 2018-12-04
Publication date: 2020-05-07
Also published as: CN208848009U

Abstract

Disclosed is a colour film substrate, comprising: a base substrate; a colour filter layer arranged on the base substrate, wherein the colour filter layer comprises a plurality of colour resistances, the plurality of colour resistances comprise a plurality of first colour resistances and a plurality of second colour resistances, a groove is formed in the first colour resistance, and the first colour resistance and the second colour resistance are arranged on the same layer; an auxiliary supporting unit arranged in the groove of the first colour resistance; and a main supporting unit arranged on the second colour resistance, wherein the total height of the main supporting unit and the second colour resistance is greater than the total height of the auxiliary supporting unit and the first colour resistance.

Description

Color film substrate, liquid crystal display panel and liquid crystal display device

Related application

This application requires the priority of the Chinese patent application with the application number of 201821766286.4 and the name of "color film substrate, liquid crystal display panel and liquid crystal display device", which was applied on October 29, 2018, and the entire content is hereby incorporated by reference.

Technical field

The present application relates to the field of display, in particular to a color film substrate, a liquid crystal display panel and a liquid crystal display device.

Background technique

The statements here only provide background information related to the present application and do not necessarily constitute prior art.

The liquid crystal display panel includes a color filter substrate and an array substrate provided to the cell. In order to ensure the stability of the display, a supporting unit is provided between the color filter substrate and the array substrate to maintain a stable liquid crystal cell gap between the color filter substrate and the array substrate.

Generally, the supporting unit is provided on the color filter substrate. The support unit is divided into a main support unit and an auxiliary support unit. The height of the main support unit is greater than the height of the auxiliary support unit. When the liquid crystal display panel is not under external force, the main support unit is used to support the color filter substrate and the array substrate, and the auxiliary support unit is suspended. When the liquid crystal display panel is subjected to an external force, the auxiliary supporting unit plays a supporting role.

The height difference between the main support unit and the auxiliary support unit is a step difference. Increasing the step difference between the main support unit and the auxiliary support unit can increase the applicable range of the liquid crystal amount (LC Margin), thereby avoiding the expansion or contraction of the liquid crystal in the liquid crystal cell due to changes in external temperature or stress beyond the LC Margin, that is To avoid gravity Mura (unevenness) due to the expansion of the liquid crystal in the LCD panel due to the expansion exceeding the maximum value of LC Margin, and to avoid the occurrence of Bubble (bubble) due to the shrinkage of the liquid crystal volume in the LCD panel below the minimum value of LC Margin .

Generally, the main support unit and the auxiliary support unit with different heights are formed by means of a half-tone photomask (HTM) or gray-scale tone photomask (GTM). However, the difference between the main support unit and the auxiliary support unit formed in these ways is limited.

Summary of the invention

According to various embodiments of the present application, there is provided a color filter substrate, a liquid crystal display panel, and a liquid crystal display device that can increase the step difference of the main support unit and the auxiliary support unit.

According to an aspect of the present application, a color filter substrate is provided, which includes:

Substrate

A color filter layer is provided on the base substrate; the color filter layer includes a plurality of color resists, and the plurality of color resists includes a plurality of first color resists and a plurality of second color resists; the first A color resist is provided with a groove, and the first color resist and the second color resist are arranged in the same layer;

An auxiliary support unit provided in the groove of the first color resist; and

The main support unit is provided on the second color resist, and the total height of the main support unit and the second color resist is greater than the total height of the auxiliary support unit and the first color resist.

In the above color filter substrate, a groove is provided on the first color resist, and the auxiliary support unit is provided in the groove, that is, the step difference between the main support unit and the auxiliary support unit is increased by the depth of the groove.

In one of the embodiments, the color filter layer further includes a pad color resist unit; the pad color resist unit includes a pad color resist disposed between the base substrate and the second color resist .

In one of the embodiments, the pad color resistance unit includes a layer of pad color resistance.

In one of the embodiments, the pad color resisting unit includes at least two layers of pad color resisting with different colors.

In one of the embodiments, the second color resist and the pad color resist are color resists of different colors.

In one embodiment, the second color resistance and the pad color resistance are the same color resistance.

In one embodiment, the color filter layer further includes a pad color resist unit; the pad color resist unit includes a pad color resist disposed between the second color resist and the main support unit .

In one of the embodiments, the plurality of color filters of the color filter layer include three color filters of different colors, the first color resistor includes at least one of the three color filters, and the second color The resistance includes at least one of three color resistances.

In one embodiment, the color filters of the color filter layer include red color filters, green color filters, and blue color filters.

In one of the embodiments, the color filter layer further includes a pad color resist unit; the pad color resist unit includes a pad color resist disposed between the base substrate and the second color resist The first color resist is a green color resist, the second color resist is a blue color resist, and the pad color resist is a green color resist.

In one of the embodiments, the height of the pad color resist is the same as the height of the first color resist.

In one of the embodiments, the color filter layer further includes a pad color resist unit; the pad color resist unit includes a pad color resist disposed between the base substrate and the second color resist The first color resist is a red color resist, the second color resist is a blue color resist, and the pad color resist is a green color resist.

In one of the embodiments, the plurality of color filters of the color filter layer include four color filters with different colors, the first color filter includes at least one of the four color filters, and the second color The resistance includes at least one of four color resistances.

In one embodiment, the color filters of the color filter layer include red color filters, green color filters, blue color filters, and white color filters.

In one embodiment, the thickness of the first color resist is t, the depth of the groove is d, 0.5t≤d≤0.95t.

In one of the embodiments, the main support unit and the auxiliary support unit have the same height.

According to another aspect of the present application, there is provided a liquid crystal display panel, which includes a color filter substrate and an array substrate disposed opposite to the color filter substrate;

The color filter substrate includes:

Substrate

An auxiliary support unit provided in the groove of the first color resist; and

In one of the embodiments, the array substrate is a thin film transistor array substrate.

According to still another aspect of the present application, there is provided a liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel including a color film substrate, and an array substrate disposed on a box with the color film substrate;

The color filter substrate includes:

Substrate

An auxiliary support unit provided in the groove of the first color resist; and

The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of this application will become apparent from the description, drawings, and claims.

BRIEF DESCRIPTION

In order to better describe and explain the embodiments or examples of those inventions disclosed herein, reference may be made to one or more drawings. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the presently described embodiments or examples, and the best mode currently understood of these inventions.

1 is a schematic structural diagram of a color filter substrate provided by an embodiment of this application;

2 is an A-A view of the color filter substrate shown in FIG. 1;

3 is a B-B view of the color filter substrate shown in FIG. 1;

4 is a schematic cross-sectional view of a color filter substrate provided by another embodiment of this application;

5 is a C-C view of the color filter substrate shown in FIG. 4;

6 is a schematic cross-sectional view of a liquid crystal display panel provided by an embodiment of the present application.

detailed description

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described in further detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

It should be noted that when an element is referred to as being “located on” another element, it may be directly on another element or there may be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to another element or there may be a center element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not meant to be the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present application. The terminology used in the specification of the present application herein is for the purpose of describing specific embodiments only, and is not intended to limit the present application. The technical features of the above embodiments can be arbitrarily combined. To simplify the description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the scope of this description.

As shown in FIGS. 1 to 3, a color filter substrate 100 provided by an embodiment of the present application includes a base substrate 110, a color filter layer 130 provided on the base substrate 110, an auxiliary support unit 150, and a main support unit 170.

Specifically, the color filter layer 130 includes several color resists, and the several color resists include several first color resists 131 and several second color resists 133. The first color resist 131 and the second color resist 133 are arranged in the same layer. In other words, the first color resist 131 and the second color resist 133 are not stacked or overlapped.

The first color resist 131 is provided with a groove 1311, and the auxiliary supporting unit 150 is disposed in the first color resist 131 in the groove 1311. The main support unit 170 is disposed on the second color resist 133, and the total height of the main support unit 170 and the second color resist 133 is greater than the total height of the auxiliary support unit 150 and the first color resist 131.

Generally, the main support unit and the auxiliary support unit are located at positions where the corresponding color resistance corresponds to the grid black matrix, and does not affect the display of the display panel. Therefore, in this application, the groove on the first color resist is also located at the position corresponding to the gate black matrix of the first color resist, which does not affect the display of the display panel.

It can be understood that the distance D between the surface of the auxiliary support unit 150 away from the first color resist 131 and the surface of the main support unit 170 away from the second color resist 133 is the distance between the main support unit 170 and the auxiliary support unit 150 Segment difference.

It should be noted that the color filter substrate 100 further includes a structure such as a black matrix 190 disposed between the base substrate 110 and the color filter layer 130. This application does not improve the structure of the black matrix 190 and the like, and details are not described here.

A groove 1311 is provided on the first color resist 131, and the auxiliary support unit 150 is provided in the groove 1311, that is, the step difference between the main support unit 170 and the auxiliary support unit 150 is increased by the depth of the groove 1311, so that the LC can be increased Margin (applicable range of liquid crystal volume), to avoid the expansion or contraction of the liquid crystal in the liquid crystal display panel due to external temperature changes to exceed the LC Margin of the liquid crystal display panel, that is, to avoid the liquid crystal volume in the liquid crystal display panel due to expansion exceeding the maximum value of LC Margin Gravity Mura (unevenness) occurs, and at the same time, avoid the occurrence of Bubble (bubbles) due to the shrinkage of the liquid crystal in the LCD panel to a value lower than the minimum value of LCMargin.

Specifically, in this embodiment, the color filter layer 130 further includes an advanced color resist unit 135. The pad color resist unit 135 includes a pad color resist provided between the base substrate 110 and the second color resist 133. The arrangement of the cushion color resisting unit 135 further increases the distance D between the surface of the auxiliary support unit 150 away from the first color resist 131 and the surface of the main support unit 170 away from the second color resist 133, which further increases the main The step difference between the support unit 170 and the auxiliary support unit 150.

It can be understood that, similar to the groove on the first color resist, the pad color resist unit is also located at a position corresponding to the gate black matrix of the second color resist. In this embodiment, due to the arrangement of the pad color resistive unit 135, the position of the second color resist 133 corresponding to the pad color resistive unit 135 is convex.

Of course, in another embodiment, the pad color resistive unit 135 may include only or at the same time include the pad color resistive provided between the second color resist 133 and the main support unit 170.

In this embodiment, the pad color resistance unit 135 includes a layer of pad color resistance.

Optionally, in this embodiment, the second color resist 133 and the pad color resist are color resists of different colors. That is, when forming a color resist having a color different from that of the second color resist 133, a pad color resist can be formed at the same time, and the pad color resist unit 135 can be formed without adding a process.

Optionally, in this embodiment, the height of the pad color resister is the same as that of the color filter layer 130 except for the second color resister 133, thereby making the process of forming the pad color resister simpler.

It should be noted that the pad color resist is formed simultaneously with other color resists other than the second color resist 133, so the position of the pad color resist is related to the order of forming color resists of different colors in the color filter layer 130. If a color resist having the same color as the pad color resist is formed before the second color resist 133, the pad color resist is located between the base substrate 110 and the second color resist 133. If the color resist having the same color as the pad color resist is formed after the second color resist 133, the pad color resist is located between the second color resist 133 and the main support unit 170.

Of course, in another embodiment, the pad color resistive unit may also be the same color resist as the second color resist 133, for example, it may be realized by adding a process step for forming the pad color resistive, or by exposure engraving Etching or the like makes the position where the main support unit 170 is formed convex.

Of course, in another embodiment, the pad color resisting unit 135 may further include at least two layers of pad color resisting with different colors, that is, when two or more color resists other than the second color resist 133 are formed, At the same time, a high color resist is formed at the position of the high color resist unit 135.

In this embodiment, the color filters of the color filter layer 130 include three color filters with different colors. The first color resist 131 includes one of three color resists, and the second color resist 133 includes one of three color resists.

Specifically, in this embodiment, the three color resists with different colors of the color filter layer are a red color resist, a green color resist, and a blue color resist, respectively. Among them, the first color resist 131 is a green color resist, the second color resist 133 is a blue color resist, the pad color resist 135 is a green color resist, and the color resists without the main support unit 170 and the auxiliary support unit 150 are red Resistance 137. The height of the pad color resist 135 is the same as the height of the first color resist 131.

Of course, in another embodiment, the first color resist further includes two or three different color resists, and the second color resist may also include two or three different color resists. That is, the same color resist of the color filter layer is partially a first color resist 131 and a second color resist 133.

Of course, in other embodiments, the plurality of color resist layers of the color filter layer 130 may further include four color resists with different colors, the first color resist includes at least one of the four color resists, and the second color The resistance includes at least one of four color resistances. Specifically, in a feasible embodiment, the four color resistances are red color resistance, green color resistance, blue color resistance, and white color resistance, respectively.

Specifically, in this embodiment, the thickness of the first color resist 131 is set to t, the depth of the groove 1311 is d, and 0.5t ≦ d ≦ 0.95t. Specifically, for example, d = 0.5t, d = 0.55t, d = 0.6t, d = 0.65t, d = 0.7t, d = 0.75t, d = 0.8t, d = 0.85t, d = 0.9t, d = 0.95t.

In this embodiment, the thickness of the color filters of the color filter layer 130 is the same. Of course, in other embodiments, the thickness of the color filters of the color filter layer 130 may also be different. When the depth t of the groove 1311 is set, the thickness of the first color resistor 131 and the display panel The required step can be set.

In this embodiment, the main support unit 170 and the auxiliary support unit 150 have the same height. That is, by reasonably setting the depth of the groove 1311 and the thickness of the color resist unit 135, the step difference between the main support unit 170 and the auxiliary support unit 150 can meet the design requirements of the liquid crystal display panel.

The main support unit 170 and the auxiliary support unit 150 have the same height. Therefore, they can be formed by a common mask, the process is simple, and the cost is low.

Of course, in other embodiments, if the height of the first color resist is sufficiently high and the heights of the main support unit 170 and the auxiliary support unit 150 are the same, the depth of the groove 1311 may also satisfy the main support unit 170 and the auxiliary support Segment of unit 150.

As shown in FIGS. 4 and 5, the color filter substrate 200 provided by another embodiment of the present application is different from the color filter substrate 100 in that the first color resist 231 is a red color resist and the second color resist 233 is a blue The color resistance, the pad color resistance 235 is a green color resistance, and the color resistance without the main support unit 270 and the auxiliary support unit 250 is a red color resistance 237.

As shown in FIG. 6, a liquid crystal display panel 1000 provided by an embodiment of the present application includes a color filter substrate 100 and an array substrate 300 disposed opposite to the color filter substrate 100.

In this embodiment, the array substrate 300 is a TFT (Thin Film Transistor, thin film transistor) array substrate. Of course, in other embodiments, the array substrate 300 is not limited to the TFT array substrate, and may be other kinds of array substrates.

The liquid crystal display panel 1000 includes a color filter substrate 100, which is provided with a groove 1311 on the first color resist 131, and the auxiliary support unit 150 is provided in the groove 1311, that is, the main support unit 170 and The step difference of the auxiliary supporting unit 150 further increases the LC Margin of the liquid crystal display panel, thereby improving the yield rate of the liquid crystal display panel.

Of course, in other embodiments, the liquid crystal display panel may further include other color filter substrates provided by the present application.

An embodiment of the present application further provides a liquid crystal display device, which includes the liquid crystal display panel provided by the present application.

The above liquid crystal display device includes the color filter substrate provided by the present application, which is provided with a groove on the first color resist, and the auxiliary support unit is provided in the groove, that is, the main support unit and the auxiliary support unit are increased by the depth of the groove Of the difference.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To simplify the description, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered within the scope of this description.

The above-mentioned embodiments only express several implementation manners of the present application, and their descriptions are more specific and detailed, but they should not be construed as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all fall within the protection scope of the present application. Therefore, the scope of protection of this application shall be subject to the appended claims.

Claims

A color film substrate, including:

Substrate

A color filter layer is provided on the base substrate; the color filter layer includes a plurality of color resists, and the plurality of color resists includes a plurality of first color resists and a plurality of second color resists; the first A color resist is provided with a groove, and the first color resist and the second color resist are arranged in the same layer;

An auxiliary support unit provided in the groove of the first color resist; and

The main support unit is provided on the second color resist, and the total height of the main support unit and the second color resist is greater than the total height of the auxiliary support unit and the first color resist.
The color filter substrate according to claim 1, wherein the color filter layer further includes a pad color resist unit; the pad color resist unit includes one of the base substrate and the second color resist Between the high color resistance.
The color filter substrate according to claim 2, wherein the pad color resistance unit includes a layer of pad color resistance.
The color filter substrate according to claim 2, wherein the pad color resisting unit includes at least two layers of pad color resisting with different colors.
The color filter substrate according to claim 2, wherein the second color resist and the pad color resist are color resists of different colors.
The color filter substrate according to claim 2, wherein the second color resist and the pad color resist are the same color resist.
The color filter substrate according to claim 1, wherein the color filter layer further includes a pad color resist unit; the pad color resist unit includes one of the second color resist and the main support unit Between the high color resistance.
The color filter substrate according to claim 1, wherein the plurality of color resists of the color filter layer include three color resists with different colors, and the first color resist includes at least one of the three color resists The second color resist includes at least one of three color resists.
The color filter substrate according to claim 8, wherein the plurality of color resists of the color filter layer include red color resists, green color resists, and blue color resists.
The color filter substrate according to claim 9, wherein the color filter layer further includes a pad color resist unit; the pad color resist unit includes one of the base substrate and the second color resist The first color resist is a green color resist, the second color resist is a blue color resist, and the pad color resist is a green color resist.
The color filter substrate according to claim 10, wherein the height of the pad color resist is the same as the height of the first color resist.
The color filter substrate according to claim 9, wherein the color filter layer further includes a pad color resist unit; the pad color resist unit includes one of the base substrate and the second color resist The first color resist is a red color resist, the second color resist is a blue color resist, and the pad color resist is a green color resist.
The color filter substrate according to claim 1, wherein the plurality of color resists of the color filter layer include four color resists with different colors, and the first color resist includes at least one of the four color resists , The second color resist includes at least one of four color resists.
The color filter substrate according to claim 13, wherein the plurality of color resists of the color filter layer include red color resists, green color resists, blue color resists, and white color resists.
The color filter substrate according to claim 1, wherein the thickness of the first color resist is t, and the depth of the groove is d, 0.5t≤d≤0.95t.
The color filter substrate according to claim 1, wherein the main support unit and the auxiliary support unit have the same height.
A liquid crystal display panel, including a color film substrate, and an array substrate arranged on the box with the color film substrate;

The color filter substrate includes:

Substrate

A color filter layer provided on the base substrate; the color filter layer includes a plurality of color resists, the plurality of color resists includes a plurality of first color resists and a plurality of second color resists; the first A color resist is provided with a groove, and the first color resist and the second color resist are arranged in the same layer;

An auxiliary support unit provided in the groove of the first color resist; and

The main support unit is provided on the second color resist, and the total height of the main support unit and the second color resist is greater than the total height of the auxiliary support unit and the first color resist.
The liquid crystal display panel according to claim 17, wherein the array substrate is a thin film transistor array substrate.
The liquid crystal display panel according to claim 17, wherein the color filter layer further comprises a pad color resistive unit; the pad color resistive unit comprises one of the base substrate and the second color resist Between the high color resistance.
A liquid crystal display device includes a liquid crystal display panel, the liquid crystal display panel includes a color film substrate, and an array substrate provided with a box on the color film substrate;

The color filter substrate includes:

Substrate

A color filter layer is provided on the base substrate; the color filter layer includes a plurality of color resists, and the plurality of color resists includes a plurality of first color resists and a plurality of second color resists; the first A color resist is provided with a groove, and the first color resist and the second color resist are arranged in the same layer;

An auxiliary support unit provided in the groove of the first color resist; and

The main support unit is provided on the second color resist, and the total height of the main support unit and the second color resist is greater than the total height of the auxiliary support unit and the first color resist.