CN111552112A

CN111552112A - Display panel

Info

Publication number: CN111552112A
Application number: CN202010448127.5A
Authority: CN
Inventors: 曹武
Original assignee: TCL China Star Optoelectronics Technology Co Ltd
Current assignee: TCL China Star Optoelectronics Technology Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-08-18
Anticipated expiration: 2040-05-25
Also published as: CN111552112B

Abstract

A display panel comprises a first substrate and a second substrate, wherein color filter units with different colors are arranged in an array manner, the second substrate is provided with light shielding areas, and the light shielding areas comprise a plurality of first light shielding areas and a plurality of second light shielding areas which are mutually staggered; the first shading area and the second shading area define a plurality of color filtering areas corresponding to the color filtering units, the second shading area is provided with at least one fracture, and the fractures are communicated with the plurality of color filtering areas arranged along the first direction; and at least one overlapping area corresponding to the fracture is arranged between the adjacent color filter units with different colors. The fracture is arranged in the shading area corresponding to the data line on the first substrate, and the adjacent color resistors corresponding to the fracture on the second substrate on the opposite side are overlapped in the block area, so that the light leakage problem caused by the fracture is solved, the complementary shading effect is formed, the flowing uniformity of the diffusion of the alignment liquid coated on the substrate in the horizontal direction is improved while the shading is ensured, and the diffusion uniformity of the alignment liquid can be improved.

Description

Display panel

Technical Field

The application relates to the technical field of display, in particular to a display panel.

Background

The liquid crystal display panel is generally formed by pairing a color film substrate and an array substrate, wherein a black matrix, a spacer and the like on the color film substrate can cause the micro-fluctuation of the topography of the surface of the color film substrate, and the topography can cause the solution diffusion to be blocked when the alignment liquid is coated, so that the alignment liquid can not uniformly diffuse. With the improvement of pixel resolution and the reduction of pixel size, the difficulty of diffusion of the alignment liquid is obviously increased, so that the alignment liquid cannot diffuse in place, the alignment liquid is not sticky, and the corresponding pixel area cannot realize black and white state control.

In summary, the phenomenon of non-uniform diffusion of the alignment liquid exists in the conventional alignment film process of the liquid crystal display panel, and is to be improved.

Disclosure of Invention

The embodiment of the application provides a display panel, which is used for solving the technical problem that the existing display panel is influenced by uneven diffusion of alignment liquid due to microcosmic topographic fluctuation of the surface of a color film substrate.

In order to solve the above problems, the technical scheme provided by the invention is as follows:

the embodiment of the application provides a display panel, which comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, and the liquid crystal layer is clamped between the first substrate and the second substrate; the first substrate is provided with color filter units with different colors in an array manner; the second substrate is provided with a light shielding area, and the light shielding area comprises a plurality of first light shielding areas of the second substrate and a plurality of second light shielding areas, which are mutually staggered and are arranged opposite to the first substrate; the first shading area and the second shading area define a plurality of color filter areas corresponding to the color filter units, the second shading area is provided with at least one fracture, and the fractures are communicated with the plurality of color filter areas arranged along a first direction; at least one overlapping area is arranged between two adjacent color filter units with different colors, and the overlapping area corresponds to the fracture.

In at least one embodiment of the present application, the fractures of the plurality of second light-shielding regions arranged in the first direction are disposed flush with each other.

In at least one embodiment of the present application, the fractures of the plurality of second light shielding regions arranged along the first direction are arranged in a staggered manner.

In at least one embodiment of the present application, the second shading area has one of the interruptions.

In at least one embodiment of the present application, an orthographic projection of the fracture at the overlap region is located within the overlap region.

In at least one embodiment of the present application, the light shielding layer of the first light shielding region and the light shielding layer of the second light shielding region each include a black matrix.

In at least one embodiment of the present application, the break is a through hole penetrating through the black matrix.

In at least one embodiment of the present application, a light shielding layer width of the first light shielding region is greater than a light shielding layer width of the second light shielding region.

In at least one embodiment of the present application, the first light-shielding region is disposed corresponding to a scan line on the first substrate.

In at least one embodiment of the present application, the second light-shielding region is disposed corresponding to a data line on the first substrate.

The invention has the beneficial effects that: the fracture is arranged in the shading area corresponding to the data line on the first substrate, so that the flowing uniformity of the alignment liquid coated on the substrate and diffused in the horizontal direction is improved, the light leakage problem caused by the fracture is solved, the block-shaped area overlapping is carried out on the second substrate on the opposite side through the adjacent color resistors corresponding to the fracture, the complementary shading effect is achieved, and the light filtering is guaranteed while the diffusion uniformity of the alignment liquid is improved.

Drawings

In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic plan view illustrating a light-shielding region on a second substrate according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view at AA' of FIG. 1;

fig. 3 is a schematic plan view illustrating a color filter unit on a first substrate according to an embodiment of the present disclosure;

FIG. 4 is an exploded view of adjacent color filter cells of different colors according to an embodiment of the present disclosure;

fig. 5 is a schematic plan view illustrating a light-shielding region on a second substrate according to another embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a first substrate according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

As shown in fig. 1 and 2, an embodiment of the present application provides a display panel 100, including a first substrate 10 and a second substrate 20 disposed opposite to the first substrate 10, wherein a liquid crystal layer is interposed between the first substrate and the second substrate 20.

In an embodiment, the first substrate 10 may be a COA (Color Filter On Array, where Color filters are integrated On the Array substrate) type Array substrate, and the Color Filter units 40 with different colors are arranged On the first substrate 10 in an Array manner.

Specifically, as shown in fig. 3, the color filter unit 40 includes a plurality of color resistors, such as a first color resistor 41, a second color resistor 42, and a third color resistor 43, and the first color resistor 41, the second color resistor 42, and the third color resistor 43 respectively correspond to one of red, green, and blue color resistors.

The second substrate 20 is provided with a light-shielding region 30, and the light-shielding region 30 is used for shielding metal devices of a non-light-emitting region.

The light-shielding region 30 includes a plurality of first light-shielding regions 31 and second light-shielding regions 32 that are staggered with each other, and the first light-shielding regions 31 and the second light-shielding regions 32 are used for shielding metal devices distributed in different directions.

The first light-shielding region 31 and the second light-shielding region 32 define a plurality of color filter regions 301 corresponding to the color filter units 40, and the color filter regions 301 are used for filtering light.

In a display panel with an IPS type structure, an organic planarization layer is not generally disposed on a color filter substrate, and a black matrix is disposed on the color filter substrate to shield metal traces, such as data lines and scan lines, on an array substrate. Due to the fact that the black matrix has a certain thickness, a plurality of closed grooves with a certain height can be formed, and due to the structure, when alignment liquid is coated on the color film substrate subsequently, the mobility of the alignment liquid is blocked, the alignment liquid is limited in the grooves, the uniformity of the alignment liquid on the whole substrate is further influenced, the alignment effect of liquid crystals is influenced, and particularly, the influence is worse for a display panel with high PPI and reduced pixel size. The present embodiment can solve the above-described drawbacks by improving the light-shielding region 30 on the second substrate 20.

Specifically, the fractures 321 are disposed on the light-shielding region 30 to connect the plurality of color filter regions 301 arranged in the same direction, so that the alignment liquid can flow in the horizontal direction when the alignment liquid is subsequently applied, thereby improving the diffusion uniformity of the alignment liquid.

Generally, a lateral shading area is disposed on a color film substrate to shade the traces of a metal area of a thin film transistor below the color film substrate, such as the traces of a gate, a source/drain, a scan line, etc., and the lateral shading area has a relatively large width. In addition, in order to prevent the interference of the color mixture of the red, green and blue color resistors with the display, a longitudinal light shielding area is arranged between the adjacent different color resistors for shielding light, and simultaneously, the effect of shielding the data lines below is achieved, and the width of the longitudinal light shielding area is small so as to keep a large aperture ratio.

Since the fractures 321 are provided in the light-shielding region 30, the fractures 321 have no light-shielding effect or have a weak light-shielding effect, the embodiment of the present application overlaps at the fractures 321 by using the color filter units 40 of different colors adjacent to each other on the opposite substrate (the first substrate 10), so as to achieve the light-shielding effect.

As shown in fig. 1, in one embodiment, the lengths of the first light-shielding regions 31 extend along a first direction X, a plurality of the first light-shielding regions 31 are arranged along a second direction Y, the lengths of the second light-shielding regions 32 are arranged along the second direction Y and are disconnected at intersections with the first light-shielding regions 31, and a plurality of the second light-shielding regions 32 are arranged along the first direction X. The first direction X and the second direction Y intersect and may form an angle of 90 degrees.

In one embodiment, the first light-shielding region 31 and the second light-shielding region 32 are bar-shaped structures, and the color filter region defined by the bar-shaped structures is a rectangular structure.

In one embodiment, the first light-shielding region 31 may be disposed corresponding to a scan line on the first substrate 10. Correspondingly, the second light-shielding region 32 may be disposed corresponding to a data line on the first substrate 10.

Since the color filter units 40 with different colors are required to be overlapped to supplement the light shielding function at the fracture 321, the fracture 321 may be opened on the second light shielding region 32.

The first light-shielding region 31 has a light-shielding layer width greater than that of the second light-shielding region 32.

The second light shielding region 32 has at least one break 321 to ensure that the break 321 communicates with a plurality of color filter regions 301 arranged along the first direction X.

At least one overlapping area 401 is arranged between two adjacent color filter units 40 with different colors, and the overlapping areas 401 are in one-to-one correspondence with the fractures 321.

It can be understood that one of the fractures 321 may be disposed on one of the second shading areas 32, 2 or 3 of the fractures may be disposed on the other second shading areas 32, and the number of the fractures 321 on each of the second shading areas 32 is not affected by each other and may be set according to actual requirements.

In the embodiment of the present application, it is exemplified that one break is provided on each of the second light-shielding regions 32.

As shown in fig. 1, in one embodiment, the interruptions 321 of the plurality of second light-shielding regions 32 arranged along the first direction X are flush with each other.

In one embodiment, as shown in fig. 5, the interruptions 321 of the second light shielding regions 32 arranged along the first direction X may be arranged in a staggered manner.

In one embodiment, the interruptions 321 of the plurality of second light-shielding regions 32 arranged along the first direction X may be arranged periodically, where the specific breaking position of the interruptions 321 is not limited.

The orthographic projection of the fracture 321 in the overlapping region 401 is located in the overlapping region 401, so as to avoid light leakage of the fracture 321.

The overlapping area 401 includes color-resisting blocks of two different colors stacked together, for example, as shown in fig. 4, a first color-resisting block 411 is disposed at a position corresponding to the fracture 321 of the first color-resisting block 41, a second color-resisting block 421 is disposed at a position corresponding to the fracture 321 of the second color-resisting block 42 adjacent to the first color-resisting block 41, a third color-resisting block 431 is also disposed at a position corresponding to the third color-resisting block 43 adjacent to the second color-resisting block 42, the first color-resisting block 411 overlaps with the second color-resisting block 421, the second color-resisting block 421 overlaps with the third color-resisting block 431, the first color-resisting block 411 overlaps with the third color-resisting block 431, so as to form color-resisting blocks of two different colors stacked together in the corresponding overlapping area 201, and thereby achieving a light-shielding effect.

As shown in fig. 6, a plurality of thin film transistors are arranged in an array on the first substrate 10. Specifically, a first metal layer 11 is disposed on the first substrate 10, and the first metal layer 11 may be used to form a common electrode trace, a gate, and a scan line. The first metal layer 11 is covered with a gate insulating layer 12, a second metal layer 13 is arranged on the gate insulating layer 12, the second metal layer 13 can be used for forming a data line, a source electrode, a drain electrode and the like, a passivation layer covers the second metal layer 13, a plurality of color filter units 40 are arranged on the passivation layer 14, and an overlapping area 401 on each color filter unit 40 is arranged right above the data line so as to shield the data line.

In one embodiment, the light-shielding layers of the first light-shielding region 31 and the second light-shielding region 32 each include a black matrix, and the black matrix may be formed using a black photoresist. The fracture 321 is a through hole and penetrates through the black matrix.

In other embodiments, the structural design of the light-shielding region 30 and the color filter unit 40 can also be applied to other non-COA type display panels.

The length of the fracture 321 is not more than one tenth of the length of the color filter region 301, so as to avoid the fracture being too long to affect the light shielding effect of the second light shielding region 32.

The fracture is arranged in the shading area corresponding to the data line on the first substrate, so that the flowing uniformity of the alignment liquid coated on the substrate and diffused in the horizontal direction is improved, the light leakage problem caused by the fracture is solved, the block-shaped area overlapping is carried out on the second substrate on the opposite side through the adjacent color resistors corresponding to the fracture, the complementary shading effect is achieved, and the light filtering is guaranteed while the diffusion uniformity of the alignment liquid is improved.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The display panel provided by the embodiment of the present application is described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display panel, comprising:

the color filter comprises a first substrate, wherein color filter units with different colors are arranged on the first substrate in an array manner;

the second substrate is arranged opposite to the first substrate, and is provided with a light shielding area which comprises a plurality of first light shielding areas and a plurality of second light shielding areas which are staggered with each other; and

the liquid crystal layer is clamped between the first substrate and the second substrate; wherein,

the first shading area and the second shading area define a plurality of color filter areas corresponding to the color filter units, the second shading area is provided with at least one fracture, and the fractures are communicated with the plurality of color filter areas arranged along a first direction;

at least one overlapping area is arranged between two adjacent color filter units with different colors, and the overlapping area corresponds to the fracture.

2. The display panel according to claim 1, wherein the interruptions of the plurality of second light-shielding regions aligned in the first direction are disposed flush.

3. The display panel according to claim 1, wherein the fractures of the plurality of second light-shielding regions arranged in the first direction are arranged offset.

4. The display panel according to claim 1, wherein the second light-shielding region has one of the interruptions.

5. The display panel of claim 1, wherein an orthographic projection of the discontinuity at the overlap region is within the overlap region.

6. The display panel according to claim 1, wherein the light-shielding layers of the first light-shielding region and the light-shielding layers of the second light-shielding region each include a black matrix.

7. The display panel according to claim 6, wherein the break is a through hole penetrating the black matrix.

8. The display panel according to claim 6, wherein the break length is not more than one tenth of the color filter region length.

9. The display panel according to claim 8, wherein the first light-shielding region is disposed corresponding to a scan line on the first substrate.

10. The display panel according to claim 9, wherein the second light-shielding region is disposed corresponding to a data line on the first substrate.