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CN-121978857-A - Display panel, preparation method thereof and display device

CN121978857ACN 121978857 ACN121978857 ACN 121978857ACN-121978857-A

Abstract

The application provides a display panel and a preparation method thereof, and a display device, wherein the display panel comprises a bearing substrate, a pixel defining layer and a color conversion layer, scattering particles are arranged in the pixel defining layer, the pixel defining layer is arranged on one side of the bearing substrate, the pixel defining layer is arranged in an array manner and forms a plurality of opening areas, the color conversion layer comprises a plurality of color conversion parts, the color conversion parts are arranged on one side of the bearing substrate, the color conversion layers are arranged in the opening areas, the size of one end of the pixel defining layer far away from the bearing substrate is larger than that of one end close to the bearing substrate, the pixel defining layer forms an inverted trapezoid structure with wide upper part and narrow lower part, the inclined side wall of the inverted trapezoid is equivalent to a light blocking barrier, large-angle light rays can be blocked by the inclined side wall, the light rays are prevented from being led into adjacent pixels, the phenomena of light crosstalk, light mixing, large-angle color cast and the like of the display panel can be greatly reduced, and the display effect of the display panel is further improved.

Inventors

  • Lin Shiran
  • XU PEI

Assignees

  • 惠科股份有限公司

Dates

Publication Date
20260505
Application Date
20260401

Claims (11)

  1. 1. A display panel, comprising: A carrier substrate; a pixel defining layer having scattering particles disposed therein, the pixel defining layer being disposed on one side of the carrier substrate and arranged in an array to form a plurality of opening regions, and The color conversion layer comprises a plurality of color conversion parts, the color conversion parts are arranged on one side of the bearing substrate, and the color conversion layer is arranged in the opening area; The size of one end, far away from the bearing substrate, of the pixel defining layer is larger than the size of one end, close to the bearing substrate, of the pixel defining layer, so that the pixel defining layer is inclined in a first direction along a direction, close to the center of the opening area, the cross section of the pixel defining layer is inverted trapezoid, and the first direction is the setting direction of the bearing substrate and the pixel defining layer.
  2. 2. The display panel according to claim 1, further comprising a shielding layer disposed on the pixel defining layer and on a side of the pixel defining layer facing away from the carrier substrate, wherein a surface of the shielding layer facing the opening area is an inclined surface, and the inclined surface is disposed at an angle to the first direction.
  3. 3. The display panel of claim 1, wherein the color conversion layer comprises a quantum dot layer or a color resist layer.
  4. 4. The display panel according to claim 2, the display panel is characterized in that the display panel further comprises: The first polarizing layer is arranged on one side, away from the bearing substrate, of the color conversion layer, and covers the color conversion layer and the shielding layer; the flat layer is arranged on one side of the first polarizing layer, which is away from the bearing substrate; The orientation layer is arranged on one side of the flat layer, which is away from the bearing substrate; the liquid crystal layer is arranged on one side of the orientation layer, which is away from the bearing substrate; the array substrate is arranged on one side of the liquid crystal layer, which is away from the bearing substrate; the second polarizing layer is arranged on one side, away from the bearing substrate, of the array substrate, and the polarizing direction of the second polarizing layer is perpendicular to the polarizing direction of the first polarizing layer.
  5. 5. A method for manufacturing a display panel according to any one of claims 1 to 4, comprising: Providing a bearing substrate; Forming a pixel defining layer on the bearing substrate, wherein scattering particles are arranged in the pixel defining layer, the pixel defining layer is arranged in an array and forms a plurality of opening areas, the size of one end of the pixel defining layer far away from the bearing substrate is larger than that of one end of the pixel defining layer close to the bearing substrate, so that the pixel defining layer is inclined in a first direction along a direction close to the center of the opening areas, the cross section of the pixel defining layer is inverted trapezoid, and the first direction is the arrangement direction of the bearing substrate and the pixel defining layer; And forming a color conversion layer on the bearing substrate, wherein the color conversion layer comprises a plurality of color conversion parts, the color conversion parts are arranged on one side of the bearing substrate, and the color conversion layer is arranged in the opening area.
  6. 6. The method of manufacturing according to claim 5, wherein forming a pixel defining layer on the carrier substrate comprises: Coating a first photoresist, wherein the first photoresist comprises a negative photoresist, and scattering particles are arranged in the first photoresist; Baking and exposing the first photoresist, wherein scattering particles are arranged in the first photoresist, so that the exposure dose of the first photoresist, which is close to the light source, is larger than that of the first photoresist, which is far away from the light source; Etching the first photoresist by using a first solution, wherein the mass percentage of tetramethyl ammonium hydroxide in the first solution ranges from 0.3wt% to 0.5wt%; and baking the etched first photoresist to form the pixel defining layer with the inverted trapezoid cross section.
  7. 7. The method of manufacturing according to claim 5, wherein the color conversion layer includes a quantum dot layer, the forming the color conversion layer on the carrier substrate includes: inkjet printing the raw material layer; placing the raw material layer in a vacuum environment for defoaming; irradiating UV light to the raw material layer for photocrosslinking; the raw material layer is baked to form the color conversion layer.
  8. 8. The method of manufacturing according to claim 5, wherein the color conversion layer includes a color resist layer including a first color resist, a second color resist, and a third color resist, the forming the color conversion layer on the carrier substrate includes: coating a first color resistance material layer, exposing, developing and etching the first color resistance material layer to form the first color resistance; Coating a second color resistance material layer, exposing, developing and etching the second color resistance material layer to form the second color resistance; and coating a third color resistance material layer, and exposing, developing and etching the third color resistance material layer to form the third color resistance.
  9. 9. The manufacturing method according to claim 5, further comprising forming a shielding layer on the pixel defining layer, wherein a surface of the shielding layer facing the opening region is an inclined surface, and the inclined surface is disposed at an angle to the first direction; forming a shielding layer on the pixel defining layer, comprising: coating a second photoresist, wherein the second photoresist comprises a positive photoresist; baking and exposing the second photoresist; etching the second photoresist by using a second solution, wherein the mass percentage of the tetramethylammonium hydroxide in the second solution ranges from 2wt% to 3wt%; Ashing the second photoresist using oxygen; And baking the etched second photoresist to form the shielding layer.
  10. 10. The method of manufacturing a display panel according to claim 9, further comprising: forming a first polarizing layer, wherein the first polarizing layer is arranged on one side of the color conversion layer, which is away from the bearing substrate, and covers the color conversion layer and the shielding layer; Forming a flat layer, wherein the flat layer is arranged on one side of the first polarization layer, which is away from the bearing substrate; Forming an orientation layer, wherein the orientation layer is arranged on one side of the flat layer, which is away from the bearing substrate; forming a liquid crystal layer, wherein the liquid crystal layer is arranged on one side of the orientation layer, which is away from the bearing substrate; Providing an array substrate for box alignment, wherein the array substrate is arranged on one side of the liquid crystal layer, which is away from the bearing substrate; And providing a second polarizing layer, wherein the second polarizing layer is arranged on one side of the array substrate, which is away from the bearing substrate, and the polarizing direction of the second polarizing layer is perpendicular to the polarizing direction of the first polarizing layer.
  11. 11. A display device, comprising a backlight module and the display panel of any one of claims 1-4, wherein the display panel is disposed on the backlight module, the backlight module is configured to emit visible light to the display panel, and the display panel is configured to receive the visible light and form a display screen.

Description

Display panel, preparation method thereof and display device Technical Field The application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device. Background In the related art, large-angle light emitted by the backlight module is easy to overflow from a pixel gap of the display panel, so that serious light crosstalk and light mixing phenomena are caused, and the display effect of the display panel is affected. Disclosure of Invention The application aims to provide a display panel, a preparation method thereof and a display device, which are used for solving the technical problems that large-angle light rays emitted by a backlight module are easy to overflow from a pixel gap of the display panel, serious light crosstalk and light mixing phenomena are caused, and the display effect of the display panel is affected. In a first aspect, the present application provides a display panel comprising: A carrier substrate; a pixel defining layer having scattering particles disposed therein, the pixel defining layer being disposed on one side of the carrier substrate and arranged in an array to form a plurality of opening regions, and The color conversion layer comprises a plurality of color conversion parts, the color conversion parts are arranged on one side of the bearing substrate, and the color conversion layer is arranged in the opening area; The size of one end, far away from the bearing substrate, of the pixel defining layer is larger than the size of one end, close to the bearing substrate, of the pixel defining layer, so that the pixel defining layer is inclined in a first direction along a direction, close to the center of the opening area, the cross section of the pixel defining layer is inverted trapezoid, and the first direction is the setting direction of the bearing substrate and the pixel defining layer. In the display panel provided by the application, scattering particles are arranged in the pixel defining layer, the pixel defining layer is arranged on one side of the bearing substrate, the pixel defining layer is arranged in an array manner and forms a plurality of opening areas, the color conversion layer comprises a plurality of color conversion parts, the color conversion parts are arranged on one side of the bearing substrate, and the color conversion layers are arranged in the opening areas, wherein the size of one end of the pixel defining layer far away from the bearing substrate is larger than the size of one end of the pixel defining layer close to the bearing substrate, so that the pixel defining layer is inclined in a direction close to the center of the opening area in a first direction, the cross section of the pixel defining layer is in an inverted trapezoid shape, and the first direction is the arrangement direction of the bearing substrate and the pixel defining layer. The pixel defining layer forms an inverted trapezoid structure with a wide upper part and a narrow lower part, the inverted trapezoid inclined side wall is equivalent to a light blocking barrier, large-angle light rays can be blocked by the inclined side wall, the light rays are prevented from being connected into adjacent pixels in series, the phenomena of light crosstalk, light mixing, large-view-angle color cast and the like of the display panel can be greatly reduced, and the display effect of the display panel is further improved. And the scattering particles have high reflectivity, and can reflect light rays irradiated to the side wall of the pixel defining layer back into the opening area, so that the light rays are prevented from leaking to adjacent pixels, the crosstalk phenomenon is further reduced, and the display effect of the display panel is improved. The display panel further comprises a shielding layer, wherein the shielding layer is arranged on the pixel defining layer and on one side, away from the bearing substrate, of the pixel defining layer, the surface, facing the opening area, of the shielding layer is an inclined surface, and the inclined surface and the first direction are arranged in an included angle mode. Wherein the color conversion layer comprises a quantum dot layer or a color resistance layer. Wherein, the display panel still includes: The first polarizing layer is arranged on one side, away from the bearing substrate, of the color conversion layer, and covers the color conversion layer and the shielding layer; the flat layer is arranged on one side of the first polarizing layer, which is away from the bearing substrate; The orientation layer is arranged on one side of the flat layer, which is away from the bearing substrate; the liquid crystal layer is arranged on one side of the orientation layer, which is away from the bearing substrate; the array substrate is arranged on one side of the liquid crystal layer, which is away from the bearing substrate; the second polarizing layer is arranged on one side, away f