CN220232184U - Display panel and display device - Google Patents

Abstract

The application discloses a display panel and a display device, mainly relates to the technical field of display, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal layer, the color film substrate and the array substrate are oppositely arranged, and the liquid crystal layer is arranged between the color film substrate and the array substrate; the array substrate comprises a substrate, a light filtering layer and an active switch layer, wherein the active switch layer is arranged on one side of the substrate, which is close to the color film substrate, the light filtering layer is arranged between the active switch layer and the liquid crystal layer, the light filtering layer comprises a first light filtering area and a second light filtering area, the first light filtering area corresponds to a display area of the display panel, the second light filtering area corresponds to a non-display area of the display panel, the thickness of the second light filtering area is smaller than or equal to that of the first light filtering area, the direction from the display area to the non-display area is a first direction, and the thickness of the second light filtering area is gradually reduced along the first direction. Through the design, the second light filtering area does not need to be widened, so that the step difference of the light filtering layer can be relieved, and the problem of light leakage at the edge of the display area of the display panel is solved.

Description

Display panel and display device

Technical Field

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

Background

A conventional liquid crystal display panel may be composed of two oppositely disposed color film substrates and an array substrate, on which field generating electrodes such as pixel electrodes and a common electrode are formed. The liquid crystal layer may be interposed between two substrates, and a filter layer may be provided on either one of the two substrates. The present application is mainly directed to a display panel of the CF On Array (color filter attached to Array technology) type, in which a filter layer is disposed On an Array substrate.

The rubbing alignment is needed when the color film substrate and the array substrate are assembled into the box, but the filter layer is arranged on the array substrate, so that the corresponding height difference is generated at the edge position, namely the step position, of the alignment layer corresponding to the filter layer, the alignment of the liquid crystal of the display panel is disordered, and the light leakage of the display panel occurs.

Disclosure of Invention

The purpose of this application is to provide a display panel and display device, effectively prevents that display panel liquid crystal from deflecting the disorder, avoids appearing the light leak, promotes display panel's display effect.

The application discloses a display panel, the display panel includes color film base plate, array base plate and liquid crystal layer, the color film base plate with the opposite setting of array base plate, the liquid crystal layer sets up between the color film base plate with the array base plate; the array substrate comprises a substrate, a light filtering layer and an active switch layer, wherein the active switch layer is arranged on one side, close to the color film substrate, of the substrate, the light filtering layer is arranged between the active switch layer and the liquid crystal layer, the light filtering layer comprises a first light filtering area and a second light filtering area, the first light filtering area corresponds to a display area of the display panel, the second light filtering area corresponds to a non-display area of the display panel, the thickness of the second light filtering area is smaller than or equal to that of the first light filtering area, the direction from the display area to the non-display area is a first direction, and the thickness of the second light filtering area gradually decreases along the first direction.

Optionally, the array substrate further includes an alignment layer, the alignment layer is disposed between the optical filter layer and the liquid crystal layer, an alignment groove is disposed on a side of the alignment layer, which is close to the liquid crystal layer, and the extension direction of the alignment groove is taken as a second direction, and the second optical filter area is disposed on two sides of the first optical filter area along the second direction.

Optionally, the second filter region is disposed around the first filter region.

Optionally, the optical filter layer further includes a third optical filter region, where the third optical filter region is disposed between the first optical filter region and the second optical filter region, and two sides of the third optical filter region are respectively attached to the first optical filter region and the second optical filter region, and the third optical filter region corresponds to a non-display region of the display panel; the thickness of the third light filtering area is the same as that of the first light filtering area, and the thickness of one side, close to the third light filtering area, of the second light filtering area is the same as that of the third light filtering area.

Optionally, the cross section of the second filtering area is triangular, one surface of the second filtering area, which faces away from the active switch layer, is an inclined surface, and an included angle between the inclined surface and the horizontal plane is 8 ° -12 °.

Optionally, the second filtering area includes a plurality of sub-filtering bars, and a plurality of sub-filtering bars are arranged in parallel along the first direction, and each sub-filtering bar gradually reduces in thickness along the first direction.

Optionally, the second filtering area includes a plurality of sub-filtering strips, a plurality of sub-filtering strips are arranged in parallel, the length direction of the sub-filtering strips is the same as the first direction, and the thickness of each sub-filtering strip is gradually reduced along the first direction.

Optionally, the sum of the width of the second filtering region along the first direction and the width of the third filtering region along the first direction is 900 μm-1100 μm, and the width of the third filtering region along the first direction is 750 μm-850 μm.

Optionally, the gap between two adjacent sub-filter bars is 2-8 μm.

The application also discloses a display device, the display device includes backlight unit and above-mentioned display panel, backlight unit is for display panel provides backlight.

Compared with the scheme that the second filter layer corresponding to the non-display area is widened, the thickness of the second filter layer along the direction from the display area to the non-display area is gradually reduced, which is equivalent to that the slope processing is carried out at the edge of the second filter layer far away from the first filter layer, and the problem of liquid crystal deflection disorder at the corresponding step caused by the step difference of the edge of the filter layer can be relieved without widening the second filter layer, so that the problem of light leakage at the edge of the display area of the display panel is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present application;

fig. 2 is a schematic view of a cross section of a display panel according to a first embodiment of the present application;

FIG. 3 is a schematic top view of a display panel according to a first embodiment of the present application;

fig. 4 is a schematic top view of a display panel according to a second embodiment of the present application.

10, a display device; 20. a backlight module; 30. a display panel; 31. a display area; 32. a non-display area; 300. a color film substrate; 400. a liquid crystal layer; 500. an array substrate; 510. a substrate; 520. an active switching layer; 530. a filter layer; 531. a first filtering region; 532. a second filtering region; 533. sub-filter strips; 534. an inclined plane; 540. a third filtering region; 550. an alignment layer.

Detailed Description

It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.

In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The present application is described in detail below with reference to the attached drawings and alternative embodiments.

Fig. 1 is a schematic diagram of a display device according to an embodiment of the present application, as shown in fig. 1, the present application discloses a display device 10, where the display device 10 includes a backlight module 20, a circuit board (not shown in the figure), and a display panel 30, the backlight module 20 is disposed opposite to the display panel 30, and provides backlight for the display panel 30, and the circuit board is electrically connected to the display panel 30, so as to control the display panel 30 to display images.

The backlight module 20 herein includes a side-in backlight module 20 and a direct-type backlight module 20, which is not limited herein.

The present application also discloses a display panel 30, and improves the display panel 30, which can be used in the display device 10 described above, and for the display panel 30 of the present application, two main embodiments are listed for explanation, and specific designs are as follows:

example 1:

fig. 2 is a schematic view of a cross section of a display panel according to a first embodiment of the present application, as shown in fig. 2, a dashed line is shown to indicate a boundary between a display area and a non-display area, and the present application discloses a display panel 30, wherein the display panel 30 includes a color film substrate 300, an array substrate 500, and a liquid crystal layer 400, the color film substrate 300 and the array substrate 500 are oppositely disposed, and the liquid crystal layer 400 is disposed between the color film substrate 300 and the array substrate 500.

The array substrate 500 includes a substrate 510, a filter layer 530, and an active switch layer 520, wherein the active switch layer 520 is disposed on one side of the substrate 510 near the color filter substrate 300, and the filter layer 530 is disposed between the active switch layer 520 and the liquid crystal layer 400, i.e., the substrate 510, the active switch layer 520, and the filter layer 530 are stacked in sequence.

The filter layer 530 includes a first filter area 531 and a second filter area 532, the first filter area 531 corresponds to the display area 31 of the display panel 30, the second filter area 532 corresponds to the non-display area 32 of the display panel 30, the thickness of the second filter area 532 is less than or equal to the thickness of the first filter area 531, the surface of the first filter area 531 is flat, the maximum thickness of the second filter area 532 is less than or equal to the thickness of the first filter area 531, the direction from the display area 31 to the non-display area 32 is a first direction, and the thickness of the second filter area 532 is gradually reduced along the first direction. I.e. the second filter area 532 is a sloping structure in cross-section.

The filter layer 530 includes a color blocking layer (not shown) and a black matrix layer (not shown) disposed on the same layer, and the second filter region 532 may be a black matrix layer or a color blocking layer, which is not limited herein.

In the prior art, the width of the second filter region 532 corresponding to the non-display region 32 is generally made wide, but the solution has higher cost, and may cause the filter layer to cover the binding region of the non-display region 32, so that the problem of abnormal binding occurs.

Wherein the second filter area 532 is disposed around the first filter area 531. Namely, the second filter areas 532 are arranged around the first filter area 531, so that the problem of the step difference around the first filter area 531 is relieved in an omnibearing manner, and the liquid crystal deflection at any position is prevented from being disordered.

Of course, the second filter region 532 may be provided only at a position having a large influence on the liquid crystal deflection, specifically: the array substrate 500 further includes an alignment layer 550, the alignment layer 550 is disposed between the optical filter layer 530 and the liquid crystal layer 400, and an alignment groove is disposed on a side of the alignment layer 550, which is close to the liquid crystal layer 400.

Since alignment grooves are formed on the alignment layer 550 by rubbing before the liquid crystal is formed into a cell, a height level difference occurs at a level difference of the corresponding filter layer 530 in the alignment direction of the liquid crystal, resulting in abnormal deflection of the liquid crystal at the level difference, thereby causing light leakage of the display panel 30.

Therefore, with the extending direction of the alignment groove as the second direction, the second filter region 532 is disposed at both sides of the first filter region 531 along the second direction. That is, the second filter area 532 is only disposed at the position having a larger influence on the liquid crystal deflection, and compared with the scheme in which the second filter area 532 is disposed at the peripheral edge of the first filter area 531, the second filter area 532 is disposed only at the two sides having a larger influence, the manufacturing process is simpler, the pertinence is higher, and the area of the filter layer 530 corresponding to the non-display area 32 can be reduced.

Further, the first filter area 531 and the second filter area 532 may be connected and transited through the third filter area 540 having the same thickness as the first filter area 531, specifically: the third filtering area 540 is disposed between the first filtering area 531 and the second filtering area 532, and two sides of the third filtering area 540 are respectively attached to the first filtering area 531 and the second filtering area 532, and the third filtering area 540 corresponds to the non-display area 32. The thickness of the third filter region 540 is the same as the thickness of the first filter region 531, and the thickness of the second filter region 532 on the side close to the third filter region 540 is the same as the thickness of the third filter region 540.

In this way, the boundary between the second filter area 532 and the first filter area 531 is no longer the boundary directly corresponding to the display area 31 and the non-display area 32, which increases the distance between the second filter area 532 and the edge of the display area 31, and even if there is still a small amount of liquid crystal deflection at the second filter area 532 to be affected, only the liquid crystal corresponding to the third filter area 540 will be affected, and the liquid crystal in the plane corresponding to the first filter area 531 will not be affected.

Fig. 3 is a schematic top view of a display panel according to a first embodiment of the present application, and, as shown in fig. 2 and 3, a direction indicated by an arrow in fig. 3 is an alignment direction of liquid crystal, and in this embodiment, a plurality of sub-filter strips 533 are formed in the second filter 532 by exposure and development, so that the second filter 532 forms a gradient, specifically: the plurality of sub-filter strips 533 are arranged in parallel, and the length direction of the sub-filter strips 533 is the same as the first direction, that is, the sub-filter strips 533 extend along the direction from the display area 31 to the non-display area 32, and the thickness of each sub-filter strip 533 is gradually reduced along the first direction.

Wherein the sum of the width of the second filter region 532 along the first direction and the width of the third filter region 540 along the first direction is 900 μm to 1100 μm, and the width of the third filter region 540 along the first direction is 750 μm to 850 μm.

The cross-section of the second filtering area 532 is triangular, one surface of the second filtering area 532 facing away from the active switch layer 520 is an inclined surface 534, and an included angle between the inclined surface 534 and a horizontal plane is 8 ° -12 °, which can be understood that the gradient of the second filtering area 532 is 8 ° -12 °, and a gap between two adjacent sub-filtering strips 533 is 2-8 μm.

Preferably, the width of the third filter area 540 is 800 μm, the width of the second filter area 532 is 200 μm, and the angle between the inclined plane 534 and the horizontal plane is 10 °, which ensures that the corresponding liquid crystal deflection of the second filter area 532 does not affect the corresponding liquid crystal deflection of the first filter area 531, and the sum of the width of the second filter area 532 and the width of the third filter area 540 can be set to be sufficiently small.

Example 2:

fig. 4 is a schematic top view of a display panel according to a second embodiment of the present application, as shown in fig. 4, in which a direction indicated by an arrow in fig. 4 is an alignment direction of liquid crystal, unlike the first embodiment, an alignment direction of the sub-filter 533 in the present embodiment is different from that of the sub-filter 533 in the first embodiment, specifically: a plurality of the sub-filter strips 533 are juxtaposed in the direction from the display region 31 to the non-display region 32, and each of the sub-filter strips 533 is gradually reduced in thickness in the first direction.

Compared to the first embodiment, the present embodiment has the same thickness of the same sub-filter 533 in the alignment direction of the liquid crystal, and the liquid crystal deflection angles corresponding to the positions on the same sub-filter 533 are uniform, and the possibility of liquid crystal deflection disorder is relatively smaller.

It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.

The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims (10)

1. The display panel comprises a color film substrate, an array substrate and a liquid crystal layer, wherein the color film substrate and the array substrate are oppositely arranged, and the liquid crystal layer is arranged between the color film substrate and the array substrate; the array substrate comprises a substrate, a light filtering layer and an active switch layer, wherein the active switch layer is arranged on one side, close to the color film substrate, of the substrate, the light filtering layer is arranged between the active switch layer and the liquid crystal layer.

2. The display panel according to claim 1, wherein the array substrate further comprises an alignment layer, the alignment layer is disposed between the optical filter layer and the liquid crystal layer, an alignment groove is disposed on a side of the alignment layer, which is close to the liquid crystal layer, and the second optical filter region is disposed on two sides of the first optical filter region along the second direction with an extension direction of the alignment groove as the second direction.

3. The display panel of claim 1, wherein the second filter region is disposed around the first filter region.

4. The display panel according to claim 1, wherein the filter layer further comprises a third filter region, the third filter region is disposed between the first filter region and the second filter region, and two sides of the third filter region are respectively attached to the first filter region and the second filter region, and the third filter region corresponds to a non-display region of the display panel;

the thickness of the third light filtering area is the same as that of the first light filtering area, and the thickness of one side, close to the third light filtering area, of the second light filtering area is the same as that of the third light filtering area.

5. The display panel according to claim 1, wherein the cross-section of the second filter area is triangular, a surface of the second filter area facing away from the active switching layer is an inclined surface, and an included angle between the inclined surface and a horizontal plane is 8 ° -12 °.

6. The display panel of claim 1, wherein the second filter region comprises a plurality of sub-filter strips arranged side-by-side along the first direction, each sub-filter strip having a gradually decreasing thickness along the first direction.

7. The display panel according to claim 1, wherein the second filter region includes a plurality of sub-filter strips, the plurality of sub-filter strips are juxtaposed, a length direction of the sub-filter strips is the same as the first direction, and a thickness of each of the sub-filter strips is gradually reduced along the first direction.

8. The display panel of claim 4, wherein a sum of a width of the second filter region along the first direction plus a width of the third filter region along the first direction is 900 μm-1100 μm, and a width of the third filter region along the first direction is 750 μm-850 μm.

9. A display panel according to claim 6 or 7, characterized in that the gap between two adjacent sub-filter strips is 2-8 μm.

10. A display device comprising a backlight module and a display panel according to any one of claims 1-9, the backlight module providing backlight for the display panel.