CN-117250786-B - Display panel

CN117250786BCN 117250786 BCN117250786 BCN 117250786BCN-117250786-B

Abstract

The invention provides a display panel which comprises a first substrate, a second substrate, a display medium layer, a structural layer, an alignment layer and a sealing layer. The first substrate is provided with a display area and a non-display area. The display medium layer is arranged between the first substrate and the second substrate. The structure layer is provided with a plurality of micro grooves in the non-display area of the first substrate. The alignment layer is arranged between the display medium layer and the first substrate. The alignment layer covers the display area and extends to the non-display area to overlap with part of the micro grooves. The alignment layer includes a first portion and a second portion. The first portion is located between one of the micro grooves closest to the display area and the display area. The second portion is located between adjacent two of the micro grooves. The first portion and the second portion have a first film thickness and a second film thickness, respectively, along a normal direction of the structure surface, and the second film thickness is smaller than the first film thickness. The sealing layer is arranged between the first substrate and the second substrate and is positioned in the non-display area. The sealing layer overlaps at least a portion of the micro grooves.

Inventors

XU ZHENGLONG
CHEN YONGZONG
CHEN YONGZHE
CHEN ZONGYUAN

Assignees

瀚宇彩晶股份有限公司

Dates

Publication Date: 20260512
Application Date: 20220610

Claims (8)

1. A display panel, comprising: The display device comprises a first substrate, a second substrate and a first display unit, wherein the first substrate is provided with a display area and a non-display area outside the display area; A second substrate disposed opposite to the first substrate; The display medium layer is arranged between the first substrate and the second substrate; the structure layer is arranged on the first substrate, and a plurality of micro grooves are formed in the non-display area and are recessed from the structure surface of the structure layer respectively; An alignment layer disposed between the display medium layer and the first substrate, the alignment layer covering the display region and extending to the non-display region, the alignment layer covering a portion of the structured surface and overlapping a portion of the plurality of micro grooves, the alignment layer including a first portion and a second portion covering the structured surface, the first portion being located between one of the plurality of micro grooves closest to the display region and the display region, the second portion being located between adjacent two of the plurality of micro grooves, wherein the first portion and the second portion have a first film thickness and a second film thickness, respectively, along a normal direction of the structured surface, and the second film thickness is smaller than the first film thickness, and A sealing layer disposed between the first substrate and the second substrate and located in the non-display region, the sealing layer overlapping at least a portion of the plurality of micro grooves, Wherein the plurality of micro grooves are arranged along a first direction at a first pitch P, any one of the plurality of micro grooves has an opening width W at the structure surface along the first direction and a groove depth D along a normal direction of the structure surface, and the display panel satisfies the following relationship D/(P-W) > 0.7, The structure layer has a groove side surface and a groove bottom surface defining each of the plurality of micro grooves, the groove side surface connecting the structure surface and the groove bottom surface, wherein the alignment layer covers the groove bottom surface of one of the plurality of micro grooves closest to the display area and exposes the groove side surface of the one of the plurality of micro grooves.
2. The display panel of claim 1, wherein a ratio of the second film thickness to the first film thickness is less than 0.5.
3. The display panel according to claim 1, wherein the structure surface of the structure layer has a plurality of unit surfaces, the plurality of micro grooves are respectively located at geometric centers of the plurality of unit surfaces, the plurality of unit surfaces have a plurality of openings defining the plurality of micro grooves, respectively, any one of the plurality of unit surfaces has a surface area A1, one of the plurality of openings corresponding to the any one of the plurality of unit surfaces has an opening area A2, and the display panel satisfies the following relation 0.2≤A1/(A1+A2). Ltoreq.0.4.
4. The display panel of claim 1, wherein the plurality of micro grooves are structurally separate from each other.
5. The display panel according to claim 1, wherein the sealing layer extends to the one of the plurality of micro grooves and contacts a portion of the groove side surface of the one of the plurality of micro grooves exposed by the alignment layer.
6. The display panel of claim 1, wherein the structured surface of the structured layer has a plurality of openings defining the plurality of micro grooves, and wherein the respective opening widths of the plurality of openings decrease or increase as one moves away from the display area.
7. The display panel of claim 1, wherein the plurality of micro grooves includes a plurality of first micro grooves and a plurality of second micro grooves alternately arranged in a direction away from the display area, the structure surface of the structure layer has a first opening defining each of the plurality of first micro grooves and a second opening defining each of the plurality of second micro grooves, the first opening and the second opening have a first opening width and a second opening width, respectively, in an arrangement direction, and the first opening width is different from the second opening width.
8. A display panel, comprising: The display device comprises a first substrate, a second substrate and a first display unit, wherein the first substrate is provided with a display area and a non-display area outside the display area; A second substrate disposed opposite to the first substrate; The display medium layer is arranged between the first substrate and the second substrate; the structure layer is arranged on the first substrate, and a plurality of micro grooves are formed in the non-display area and are recessed from the structure surface of the structure layer respectively; An alignment layer disposed between the display medium layer and the first substrate, the alignment layer covering the display region and extending to the non-display region, the alignment layer covering a portion of the structure surface and overlapping a portion of the plurality of micro grooves, the alignment layer including a first portion and a second portion covering the structure surface, the first portion being located between one of the plurality of micro grooves closest to the display region and the display region, the second portion being located between adjacent two of the plurality of micro grooves, wherein the first portion and the second portion have a first film thickness and a second film thickness, respectively, along a normal direction of the structure surface, and the second film thickness is smaller than the first film thickness; A sealing layer disposed between the first and second substrates and located in the non-display region, the sealing layer overlapping at least part of the plurality of micro grooves, and A conductive layer disposed on the structural layer, wherein the structural layer has a groove side surface and a groove bottom surface defining each of the plurality of micro grooves, the groove side surface connects the structural surface and the groove bottom surface, the conductive layer has a side surface portion and a bottom surface portion respectively covering the groove side surface and the groove bottom surface, the alignment layer covers the bottom surface portion of the conductive layer in a first micro groove closest to the display area among the plurality of micro grooves and exposes a portion of the side surface portion of the conductive layer in the first micro groove, the plurality of micro grooves are arranged at a first pitch P along a first direction, any one of the plurality of micro grooves has an opening width W along the first direction and a groove depth D along a normal direction of the structural surface, and the display panel satisfies the following relational expression D/(P-W) > 0.7.

Description

Display panel Technical Field The present invention relates to a display panel, and more particularly, to a display panel with an alignment layer. Background One current display panel uses an alignment layer to orient the display medium layer, and the alignment layer material is mainly coated by a relief printing (ANASTATIC PRINTING) manner. Specifically, the relief printing is applied by adhering an alignment liquid to a flexible plate made of a resin and having micro grooves on the surface thereof. During the imprinting process, the alignment liquid in the micro-grooves is squeezed and transferred from the flexible plate to the substrate of the display panel. However, this way of coating the alignment material has certain requirements for process accuracy. In particular, display panels with narrow bezel designs, the accuracy requirements for relief printing are even more stringent. If the precision of the soft board printing is insufficient, the alignment layer is easy to deviate and cover the frame glue coating area, so that the adhesive capability of the frame glue is reduced or the peripheral circuit is electrically disabled, and the reliability is caused. Disclosure of Invention The present invention is directed to a display panel with better reliability. According to an embodiment of the invention, a display panel comprises a first substrate, a second substrate, a display medium layer, a structural layer, an alignment layer and a sealing layer. The first substrate is provided with a display area and a non-display area except the display area. The second substrate is arranged opposite to the first substrate. The display medium layer is arranged between the first substrate and the second substrate. The structure layer is arranged on the first substrate, and a plurality of micro grooves are arranged in the non-display area. The micro grooves are respectively recessed from the structural surface of the structural layer. The alignment layer is arranged between the display medium layer and the first substrate. The alignment layer covers the display region and extends to the non-display region. The alignment layer covers part of the structure surface and overlaps part of the micro grooves. The alignment layer includes a first portion and a second portion overlying the structured surface. The first portion is located between one of the micro grooves closest to the display area and the display area. The second portion is located between adjacent two of the micro grooves. The first portion and the second portion have a first film thickness and a second film thickness, respectively, along a normal direction of the structure surface, and the second film thickness is smaller than the first film thickness. The sealing layer is arranged between the first substrate and the second substrate and is positioned in the non-display area. The sealing layer overlaps at least a portion of the micro grooves. In the display panel according to the embodiment of the invention, the ratio of the second film thickness to the first film thickness is less than 0.5. In the display panel according to the embodiment of the invention, the structural surface of the structural layer has a plurality of cell surfaces. A plurality of micro grooves are respectively positioned at the geometric centers of the surfaces of the units. The cell surfaces each have a plurality of openings defining a plurality of micro-grooves. Any of these unit surfaces has a surface area A1. One of the openings corresponding to the any one of the cell surfaces has an opening area A2, and the display panel satisfies the following relationship of 0.2≤A1/(A1+A2). Ltoreq.0.4. In the display panel according to the embodiment of the invention, the plurality of micro grooves are arranged along the first direction at the first pitch P. Any one of the micro grooves has an opening width W on the surface of the structure along the first direction and a groove depth D along the normal direction of the surface of the structure, and the display panel satisfies the following relation D/(P-W) >0.7. In the display panel according to the embodiment of the invention, the plurality of micro grooves are structurally separated from each other. In the display panel according to the embodiment of the invention, the structural layer has the groove side surface and the groove bottom surface defining each micro groove. Groove side connection structure the surface and the bottom surface of the groove. The alignment layer covers the groove bottom surface of the first micro groove closest to the display area and exposes the groove side surface of the first micro groove. In the display panel according to the embodiment of the invention, the sealing layer extends to the first micro groove and contacts the portion of the groove side surface of the first micro groove exposed by the alignment layer. In the display panel according to the embodiment of the invention, the structure surface of the structu