CN-224218775-U - Display panel

Abstract

The utility model provides a display panel which comprises a substrate, a pixel layer arranged on one side of the substrate, and a refraction layer arranged on the light emitting side of the pixel layer, wherein the refraction layer comprises a matrix layer and crystal grains dispersed on the matrix layer. The display panel is provided with the refraction layer comprising the crystal grains at the light-emitting side, and the refractive index of the refraction layer is adjusted by adjusting the size, the shape and the like of the crystal grains, so that the adjustment of the light path is completed when light passes through the refraction layer, the total reflection loss of an interface is reduced, the probability of the light passing through the glass cover plate is improved, and the overall light-emitting efficiency of the display panel is improved.

Inventors

• ZHANG YUE
• GAO SHENG
• XU HAIYAN

Assignees

• 上海和辉光电股份有限公司

Dates

Publication Date

20260508

Application Date

20250428

Claims (10)

1. 1. A display panel, comprising: a substrate; A pixel layer disposed on one side of the substrate; The refraction layer is arranged on the light emitting side of the pixel layer and comprises a matrix layer and crystal grains dispersed on the matrix layer.
2. 2. The display panel of claim 1, wherein the host layer is a silicon nitride layer.
3. 3. The display panel of claim 1, wherein the grains are one or more of silicon grains, silicon oxynitride grains, silicon oxide grains, titanium oxide grains, and zirconium oxide grains.
4. 4. The display panel according to claim 1, wherein the refractive index of the refractive layer is between 1.8 and 2.2.
5. 5. The display panel according to claim 1, wherein the average grain size of the crystal grains is 1nm to 200nm.
6. 6. The display panel of claim 1, wherein the die comprises both a first die and a second die; the average particle diameter of the first crystal grains is different from the average particle diameter of the second crystal grains, or The refractive index of the first crystal grain is different from the refractive index of the second crystal grain.
7. 7. The display panel of claim 6, wherein the average grain size of the first grains is different from the average grain size of the second grains by more than 10%, or The refractive index of the first grain is different from the refractive index of the second grain and the difference between the refractive index of the first grain and the refractive index of the second grain is greater than 10%.
8. 8. The display panel according to claim 1, wherein the pixel layer includes a first electrode layer, a functional layer, and a second electrode layer sequentially stacked on one side of the substrate; the refractive index of the refractive layer is greater than or equal to the refractive index of the second electrode layer.
9. 9. The display panel of claim 1, wherein the pixel layer comprises a pixel definition region and a light emitting region; the display panel also comprises refraction columns which are arranged in the pixel definition areas of the two adjacent light-emitting areas.
10. 10. The display panel of claim 9, wherein the refractive columns are of a dome-shaped cylindrical structure, or The refractive index of the refractive column is 1.8-2.2.

Description

Display panel Technical Field The utility model relates to the technical field related to display panels, in particular to a display panel. Background An Organic Light-Emitting Diode (OLED) display panel has advantages of high resolution, high contrast ratio, high response speed, wide viewing angle, etc., and high quality image and portability thereof are receiving great attention in the industry. The self-luminous characteristic of the OLED display panel enables the OLED display panel to have a wider viewing angle range, and a better display effect can be achieved no matter from which angle the screen is watched. Factors that determine the characteristics of an OLED display panel are mainly luminescent materials, panel structure, and Light Extraction Efficiency (LEE). When light is emitted from a non-perpendicular direction and reaches an optical interface at a certain angle, total reflection occurs at the interface according to the refractive index relationship during the propagation from an optically dense medium to an optically sparse medium. The total reflection of the optical interface is reduced, the light extraction efficiency is improved, the loss of light in the panel can be reduced, and the external quantum efficiency of the device is obviously improved. How to reduce the spectral shift and the angular dependence by adjusting the propagation path and the scattering characteristics of light has been one of the studies of OLED display panels. It should be noted that the information of the present utility model in the above background section is only for enhancing the understanding of the background of the present utility model and thus may include information that does not form the prior art that is already known to those of skill in the art. Disclosure of utility model In view of the problems in the prior art, an object of the present utility model is to provide a display panel, in which a refractive layer including crystal grains is disposed on a light-emitting side, and the refractive layer adjusts a path of a light-emitting ray to reduce total reflection loss at an interface and improve overall light-emitting efficiency of the display panel. An embodiment of the present utility model provides a display panel including a display panel, characterized by comprising: a substrate; A pixel layer disposed on one side of the substrate; The refraction layer is arranged on the light emitting side of the pixel layer and comprises a matrix layer and crystal grains dispersed on the matrix layer. According to some examples of the utility model, the substrate layer is a silicon nitride layer. According to some examples of the utility model, the grains are one or more of silicon grains, silicon oxynitride grains, silicon oxide grains, titanium oxide grains, and zirconium oxide grains. According to some examples of the present utility model, the refractive index of the refractive layer is between 1.8 and 2.2. According to some examples of the utility model, the average grain size of the grains is 1nm to 200nm. According to some examples of the utility model, the grains include both a first grain and a second grain; the average particle diameter of the first crystal grains is different from the average particle diameter of the second crystal grains, or The refractive index of the first crystal grain is different from the refractive index of the second crystal grain. According to some examples of the utility model, the average grain size of the first grains is different from the average grain size of the second grains by more than 10%, or The refractive index of the first grain is different from the refractive index of the second grain and the difference between the refractive index of the first grain and the refractive index of the second grain is greater than 10%. According to some examples of the present utility model, the pixel layer includes a first electrode layer, a functional layer, and a second electrode layer sequentially stacked on one side of the substrate; the refractive index of the refractive layer is greater than or equal to the refractive index of the second electrode layer. According to some examples of the utility model, the pixel layer includes a pixel definition region and a light emitting region; The display panel also comprises refraction columns which are arranged on the pixel definition areas of the two adjacent light-emitting areas. According to some examples of the utility model, the refractive column is a dome-shaped cylindrical structure, or The refractive index of the refractive column is 1.8-2.2. The display panel is provided with the refraction layer comprising the crystal grains at the light-emitting side, and the refractive index of the refraction layer is adjusted by adjusting the size, the shape and the like of the crystal grains, so that the adjustment of the light path is completed when light passes through the refraction layer, the total reflection loss of an interface is re