US-12626638-B2 - Display panel and display apparatus

US12626638B2US 12626638 B2US12626638 B2US 12626638B2US-12626638-B2

Abstract

A display panel and a display apparatus. The display panel includes: a light-emitting device layer including a base plate and a light-emitting layer arranged in stack; a touch control layer including touch control electrodes and a planarization layer covering the touch control electrodes; a buffer layer arranged at a side of the planarization layer away from the light-emitting device layer; an optical film layer arranged at a side of the buffer layer away from the touch control layer and including a plurality of black matrices and a plurality of light filtering units arranged in the same layer as the black matrices; a material of the buffer layer and a material of the planarization layer are immiscible, and an orthographic projection of the buffer layer on the base plate covers an orthographic projection of the light filtering units on the base plate.

Inventors

Shao Li
Dandan SUN
Ruiqiong MEI
Weishuai Zhang

Assignees

Hefei Visionox Technology Co., Ltd.

Dates

Publication Date: 20260512
Application Date: 20231031
Priority Date: 20211216

Claims (17)

1 . A display panel comprising: a light-emitting device layer comprising a base plate and a light-emitting layer arranged in stack, the light-emitting layer comprising a plurality of sub-pixel units distributed in an array; a touch control layer arranged at a side of the light-emitting layer away from the base plate and comprising one or more touch control electrodes and a planarization layer covering the one or more touch control electrodes; a buffer layer arranged at a side of the planarization layer away from the light-emitting device layer; and an optical film layer arranged at a side of the buffer layer away from the touch control layer and comprising a plurality of black matrices and a plurality of light filtering units, wherein the plurality of light filtering units is arranged in one-to-one correspondence with the plurality of sub-pixel units, a material of the buffer layer and a material of the planarization layer are immiscible, an orthographic projection of the buffer layer on the base plate covers an orthographic projection of the plurality of light filtering units on the base plate, the planarization layer, the buffer layer, and the plurality of light filtering units are stacked in sequence and in surface contact, the plurality of black matrices is located on a surface of the planarization layer or the buffer layer, and intermiscibility between the buffer layer and the plurality of black matrices is lower than intermiscibility between the planarization layer and the plurality of black matrices.
2 . The display panel of claim 1 , wherein the orthographic projection of the buffer layer on the base plate further covers an orthographic projection of the plurality of black matrices on the base plate.
3 . The display panel of claim 2 , wherein the buffer layer is arranged as an integrated layer of a uniform thickness, the plurality of black matrices and the plurality of light filtering units are both located on an upper surface of the buffer layer.
4 . The display panel of claim 1 , wherein the buffer layer further comprises: a plurality of accommodating slots, and the plurality of black matrices is at least partially located within the plurality of accommodating slots and abuts against an inner wall surface of the plurality of accommodating slots.
5 . The display panel of claim 4 , wherein the buffer layer further comprises: a plurality of buffer units distributed in an array, the plurality of accommodating slots is enclosed by the planarization layer and the plurality of buffer units, each accommodating slot is located between two adjacent buffer units, the plurality of buffer units is arranged in one-to-one correspondence with the plurality of light filtering units, and each buffer unit covers a surface facing the light-emitting device layer of the light filtering unit corresponding to the respective buffer unit.
6 . The display panel of claim 4 , wherein a depth of the plurality of accommodating slots is equal to a thickness of the buffer layer, the plurality of accommodating slots passes through the buffer layer, and the plurality of black matrices is located on an upper surface of the planarization layer.
7 . The display panel of claim 4 , wherein the buffer layer is arranged as an integrated layer and sandwiched between the touch control layer and the optical film layer, a thickness of an area of the buffer layer corresponding to the plurality of black matrices is less than a thickness of an area of the buffer layer corresponding to the light filtering unit, and the plurality of black matrices and the light filtering units are both located on an upper surface of the buffer layer.
8 . The display panel of claim 1 , wherein the buffer layer is an inorganic material layer, the planarization layer is an organic material layer, and a material of the plurality of black matrices is an organic material.
9 . The display panel of claim 8 , wherein the buffer layer comprises at least one of silicon oxide, silicon nitride, and transparent indium tin oxide.
10 . The display panel of claim 1 , wherein a refractive index of the buffer layer is less than a refractive index of the planarization layer.
11 . The display panel of claim 1 , wherein the display panel further comprises: a reflective layer located between the planarization layer and the light-emitting layer, and the reflective layer is configured to re-reflect at least a portion of light reflected from the light-emitting device layer toward a light-emitting surface side where the light-emitting device layer is located.
12 . The display panel of claim 11 , wherein each sub-pixel unit of the plurality of sub-pixel units further comprises: an anode, a light-emitting element, and a cathode, and an orthographic projection of the reflective layer on the base plate covers cathodes of the plurality of sub-pixel units.
13 . The display panel of claim 12 , wherein the reflective layer is located between the light-emitting device layer and the touch control layer and arranged in a stack with the cathodes.
14 . The display panel of claim 11 , further comprising: an encapsulation layer located between the touch control layer and the base plate and arranged at a side of the reflective layer close to the base plate.
15 . The display panel of claim 1 , wherein the base plate further comprises: a substrate; and a device layer comprising a plurality of pixel driving circuits distributed in an array, and each pixel driving circuit of the plurality of pixel driving circuits is electrically connected with at least one sub-pixel unit of the plurality of sub-pixel units.
16 . A display apparatus, comprising the display panel of claim 1 .
17 . The display panel of claim 1 , wherein the buffer layer completely isolates the plurality of black matrices from the planarization layer.

Description

CROSS REFERENCE TO RELATED APPLICATION The present application is a continuation of International Application No. PCT/CN2022/120643 filed on Sep. 22, 2022, which claims priority to Chinese Patent Application No. 202111544912.1 filed on Dec. 16, 2021, both of which are incorporated herein by reference in their entireties. TECHNICAL FIELD The present application relates to the field of display technology, and particularly, to a display panel and a display apparatus. BACKGROUND Currently, in order to remove the polaroid, a color film layer is generally utilized to replace the polarizer, therefore the thickness of the display panel is reduced by more than 100 um, the brightness is increased by 20%, and the utmost bending radius of the flexible screen is effectively reduced. However, the utilization of the color film layer to replace the polarizer has inherent defects. Since the color film layer is directly manufactured on the touch control layer, the matching of the current materials is not good, the color film layer and the touch control layer are miscible, the removed portions of the patterned color film layer will be left on the touch control layer, and the light-emitting efficiency of the display panel is affected. SUMMARY Embodiments of the present application provide a display panel and a display apparatus, in which the display panel can satisfy the display requirement and effectively reduce the residue of the portions of the color film layer to be removed on the touch control layer, the light-emitting efficiency of the display panel is ensured. In one aspect, the embodiments of the present application provide a display panel, including: a light-emitting device layer including a base plate and a light-emitting layer arranged in stack, the light-emitting layer including a plurality of sub-pixel units distributed in an array; a touch control layer arranged at a side of the light-emitting layer away from the base plate and including one or more touch control electrodes and a planarization layer covering the touch control electrodes; a buffer layer arranged at a side of the planarization layer away from the light-emitting device layer; and an optical film layer arranged at a side of the buffer layer away from the touch control layer and including a plurality of black matrices and a plurality of light filtering units arranged in the same layer as the black matrices, the plurality of light filtering units being arranged in one-to-one correspondence with the plurality of sub-pixel units; in which a material of the buffer layer and a material of the planarization layer are immiscible, and an orthographic projection of the buffer layer on the base plate covers an orthographic projection of the light filtering units on the base plate. In another aspect, the embodiments of the present application provide a display apparatus including the display panel as described above. According to the display panel and the display apparatus provided by the embodiments of the present application, the display panel includes the light-emitting device layer, the touch control layer, the buffer layer, and the optical film layer. The light-emitting and display requirements can be satisfied through the sub-pixel units in the light-emitting device layer, and the arrangement of the touch control layer and the optical film layer can achieve the touch control function for the display panel. By adding the buffer layer between the optical film layer and the touch control layer and making the orthographic projection of the buffer layer on the base plate covers the orthographic projection of the light filtering units on the base plate, the buffer layer can separate the black matrices from the areas of the planarization layer corresponding to the various sub-pixels during the manufacturing of the optical film layer, thereby avoiding the direct contact between the black matrices and the areas of the planarization layer corresponding to the various sub-pixels. In addition, the material of the buffer layer and the material of the planarization layer are immiscible, it can be ensured that, when the black matrices of the optical film layer are patterned, the intermiscibility between the buffer layer and the black matrices is much lower than the intermiscibility between the planarization layer and the black matrices, so as to reduce or avoid the residue of the patterned black matrices in the areas corresponding to the various sub-pixel units, the light transmittance for the light emitted by the sub-pixel units and the light-emitting efficiency of the display panel are ensured, and the display effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic structural diagram of a display panel according to one embodiment of the present application; FIG. 2 shows a cross-sectional view along direction A-A in FIG. 1; FIG. 3 shows a schematic cross-sectional view of a display panel according to another embodiment of the present application;