US-12622150-B2 - Display panel and method for manufacturing the same, and displaying device

US12622150B2US 12622150 B2US12622150 B2US 12622150B2US-12622150-B2

Abstract

A display panel and a method for manufacturing the same, and a displaying device, which relates to the technical field of displaying. The display panel includes: a displaying substrate, a color light filtering layer disposed at a light exiting side of the displaying substrate. The color light filtering layer includes a first light filtering structure and a second light filtering structure of unequal thicknesses, orthographic projections of the light filtering structures on the displaying substrate cover corresponding positions of the light emitting region, and a surface of the first light filtering structure at one side away from the displaying substrate and a surface of the second light filtering structure at one side away from the displaying substrate are in a same plane.

Inventors

Zhen Li
Yunhao Wang
Ming Yang
Cheng Liu
Jing Chen

Assignees

CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20220525

Claims (13)

1 . A display panel, comprising: a displaying substrate, comprising at least one light emitting region and a non-light emitting region; and a color light filtering layer disposed at a light exiting side of the displaying substrate, wherein the color light filtering layer comprises a plurality of light filtering structures, and orthographic projections of the light filtering structures on the displaying substrate cover corresponding positions of the light emitting region, wherein the plurality of light filtering structures comprise a first light filtering structure and a second light filtering structure, a thickness of the first light filtering structure and a thickness of the second light filtering structure are different, and a surface of the first light filtering structure at one side away from the displaying substrate and a surface of the second light filtering structure at one side away from the displaying substrate are in a same plane, and wherein the display panel further comprises a functional film layer disposed between the displaying substrate and the color light filtering layer, a first slot is disposed at a surface of the functional film layer at one side close to the color light filtering layer, and the first light filtering structure fills the first slot.
2 . The display panel according to claim 1 , wherein the plurality of light filtering structures further include a third light filtering structure; and the surface of the first light filtering structure at one side away from the displaying substrate, the surface of the second light filtering structure at one side away from the displaying substrate and a surface of the third light filtering structure at one side away from the displaying substrate are in the same plane.
3 . The display panel according to claim 2 , wherein filtered-light colors of the light filtering structures are the same as emitted-light colors of the corresponding positions of the light emitting region, and thicknesses of the light filtering structures are positively correlated with luminous efficiencies of the corresponding positions of the light emitting region.
4 . The display panel according to claim 2 , wherein the thickness of the first light filtering structure is larger than the thickness of the second light filtering structure, and the thickness of the second light filtering structure is larger than or equal to a thickness of the third light filtering structure.
5 . The display panel according to claim 4 , wherein the display panel further comprises a black matrix disposed in a same layer as the color light filtering layer, and an orthographic projection of the black matrix on the displaying substrate is located within the non-light emitting region.
6 . The display panel according to claim 1 , wherein an angle of gradient of a side wall of the first slot is larger than or equal to 20°, and less than or equal to 90°; and/or a minimum distance between a boundary of an orthographic projection of a bottom face of the first slot on the displaying substrate and a boundary of the orthographic projection of the black matrix on the displaying substrate is larger than or equal to −2 μm, and less than or equal to 10 μm; and/or a depth of the first slot is larger than or equal to 0.1 μm, and less than or equal to 2.4 μm.
7 . The display panel according to claim 1 , wherein the second light filtering structure is disposed on a surface of the functional film layer at one side close to the color light filtering layer; or a second slot is disposed at the surface of the one side of the functional film layer close to the color light filtering layer, the second light filtering structure fills the second slot, and a depth of the second slot is less than a depth of the first slot.
8 . The display panel according to claim 7 , wherein an angle of gradient of a side wall of the second slot is larger than or equal to 20°, and less than or equal to 90°; and/or a distance between a boundary of an orthographic projection of a bottom face of the second slot on the luminescent layer and a boundary of the orthographic projection of the black matrix on the luminescent layer is larger than or equal to −2 μm, and less than or equal to 10 μm; and/or a depth of the second slot is larger than or equal to 0.1 μm, and less than or equal to 2.4 μm.
9 . The display panel according to claim 7 , wherein the third light filtering structure is disposed on the surface of the one side of the functional film layer close to the color light filtering layer; or a third slot is disposed at the surface of the one side of the functional film layer close to the color light filtering layer, the third light filtering structure fills the third slot, and a depth of the third slot is less than or equal to the depth of the second slot.
10 . The display panel according to claim 1 , wherein the functional film layer is a touch control functional layer, and the touch control functional layer comprises at least one of a buffer layer arranged in layer configuration, a first touch electrode layer, an insulating layer, a second touch electrode layer and a first planarization layer; and the first touch electrode layer comprises a first touch electrode, the second touch electrode layer comprises a second touch electrode, and the first touch electrode and the second touch electrode are connected by a via hole disposed in the insulating layer.
11 . The display panel according to claim 1 , wherein the display panel further comprises at least one of: a packaging layer located between the color light filtering layer and the displaying substrate; and a second planarization layer located at one side of the color light filtering layer away from the luminescent layer.
12 . A displaying device, wherein the displaying device comprises the display panel according to claim 1 .
13 . A manufacturing method, wherein the method comprises: providing a displaying substrate, wherein the displaying substrate comprises at least one light emitting region and a non-light emitting region; and forming a color light filtering layer at a light exiting side of the displaying substrate, wherein the color light filtering layer comprises a plurality of light filtering structures, and orthographic projections of the light filtering structures on the displaying substrate cover corresponding positions of the light emitting region, wherein the plurality of light filtering structures comprise a first light filtering structure and a second light filtering structure, a thickness of the first light filtering structure and a thickness of the second light filtering structure are different, and a surface of the first light filtering structure at one side away from the displaying substrate and a surface of the second light filtering structure at one side away from the displaying substrate are in a same plane, and wherein the step of forming the color light filtering layer on the light exiting side of the displaying substrate comprises: forming a functional film layer on the light exiting side of the displaying substrate; performing exposure and development and/or etching to a surface of the functional film layer at one side away from the displaying substrate, to obtain a first slot; and forming the color light filtering layer at the one side of the functional film layer away from the displaying substrate, wherein the first light filtering structure fills the first slot.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of displaying and, more particularly, to a display panel, a manufacturing method, and a displaying device. BACKGROUND In the organic light-emitting diode (OLED) display technique, the Red, Green, Blue (RGB) pixel light emission is performed by using organic light emitting devices. In order to reduce the interference by the ambient light, and increase the contrast of the displaying, currently, the color filter on encapsulation (COE) technique or the Pol-less technique has been employed, to replace the conventional solutions of polarizers, in which a color light filter exports the lights of three primary colors generated by the excitation by an organic light-emitting device, and reduces the reflectivity of the external ambient light. SUMMARY The present disclosure provides a display panel including: a displaying substrate, including at least one light emitting region and a non-light emitting region; anda color light filtering layer disposed at a light exiting side of the displaying substrate, wherein the color light filtering layer includes a plurality of light filtering structures, and orthographic projections of the light filtering structures on the displaying substrate cover corresponding positions of the light emitting region; andthe plurality of light filtering structures include a first light filtering structure and a second light filtering structure, a thickness of the first light filtering structure and a thickness of the second light filtering structure are different, and a surface of the first light filtering structure at one side away from the displaying substrate and a surface of the second light filtering structure at one side away from the displaying substrate are in a same plane. In an alternative implementation, the plurality of light filtering structures further include a third light filtering structure; and the surface of the first light filtering structure at one side away from the displaying substrate, the surface of the second light filtering structure at one side away from the displaying substrate and a surface of the third light filtering structure at one side away from the displaying substrate are in the same plane. In an alternative implementation, filtered-light colors of the light filtering structures are the same as emitted-light colors of the corresponding positions of the light emitting region, and thicknesses of the light filtering structures are positively correlated with luminous efficiencies of the corresponding positions of the light emitting region. In an alternative implementation, the thickness of the first light filtering structure is larger than the thickness of the second light filtering structure, and the thickness of the second light filtering structure is larger than or equal to a thickness of the third light filtering structure. In an alternative implementation, the display panel further includes a black matrix disposed in a same layer as the color light filtering layer, and an orthographic projection of the black matrix on the displaying substrate is located within the non-light emitting region. In an alternative implementation, the display panel further includes a functional film layer disposed between the displaying substrate and the color light filtering layer, a first slot is disposed at a surface of the functional film layer at one side close to the color light filtering layer, and the first light filtering structure fills the first slot. In an alternative implementation, an angle of gradient of a side wall of the first slot is larger than or equal to 20°, and less than or equal to 90°; and/or a minimum distance between a boundary of an orthographic projection of a bottom face of the first slot on the displaying substrate and a boundary of the orthographic projection of the black matrix on the displaying substrate is larger than or equal to −2 μm, and less than or equal to 10 μm; and/ora depth of the first slot is larger than or equal to 0.1 μm, and less than or equal to 2.4 μm. In an alternative implementation, the second light filtering structure is disposed on a surface of the functional film layer at one side close to the color light filtering layer; or a second slot is disposed at the surface of the functional film layer at the side close to the color light filtering layer, the second light filtering structure fills the second slot, and a depth of the second slot is less than a depth of the first slot. In an alternative implementation, an angle of gradient of a side wall of the second slot is larger than or equal to 20°, and less than or equal to 90°; and/or a distance between a boundary of an orthographic projection of a bottom face of the second slot on the luminescent layer and a boundary of the orthographic projection of the black matrix on the luminescent layer is larger than or equal to −2 μm, and less than or equal to 10 μm; and/ora depth of the second slot is larger than or equ