Display panel and display device

Patent metadata

Field	Value
Publication number	US-2024361631-A1
Application number	US-202418642090-A
Country	US
Kind code	A1
Filing date	Apr 22, 2024
Priority date	Apr 27, 2023
Publication date	Oct 31, 2024
Grant date	—

Abstract

A display panel and a display device are provided by the present application. The display panel includes: a glass substrate, wherein the glass substrate is a substrate at the light exiting side of the display panel; and a tandem layer located at the light exiting side of the glass substrate. The tandem layer includes one or more first sub-layers and one or more second sub-layers, and the first sub-layers and the second sub-layers are arranged alternately. A refractive index of each of the first sub-layers and a refractive index of each of the second sub-layers are unequal. A thickness of each of the first sub-layers is less than a thickness of each of the second sub-layers. A visible-light reflectivity of the display panel is less than or equal to 1.1%. The display panel is used to manufacture low-reflectivity display products.

First claim

1 . A display panel, comprising:
a glass substrate, wherein the glass substrate is a substrate at a light exiting side of the display panel; and a tandem layer located at a light exiting side of the glass substrate; the tandem layer comprises one or more first sub-layers and one or more second sub-layers, and the first sub-layers and the second sub-layers are arranged alternately; a refractive index of each of the first sub-layers is greater than a refractive index of each of the second sub-layers; a thickness of each of the first sub-layers is less than a thickness of each of the second sub-layers; wherein a visible-light reflectivity of the display panel is less than or equal to 1.1%.

2 . The display panel according to claim 1 , wherein the refractive index of each of the first sub-layers is greater than a refractive index of the glass substrate, and the refractive index of each of the second sub-layers is less than the refractive index of the glass substrate.

3 . The display panel according to claim 2 , wherein the display panel further comprises a light-transmitting conducting layer, and the light-transmitting conducting layer is located at one side of the tandem layer that is further from the glass substrate; and
a refractive index of the light-transmitting conducting layer is greater than the refractive index of each of the second sub-layers, and the refractive index of the light-transmitting conducting layer is greater than the refractive index of the glass substrate.

4 . The display panel according to claim 3 , wherein a thickness of each of at least some of the first sub-layers is less than or equal to a thickness of the light-transmitting conducting layer.

5 . The display panel according to claim 3 , wherein thicknesses of the second sub-layers are equal.

6 . The display panel according to claim 3 , wherein a quantity of the first sub-layers and a quantity of the second sub-layers are equal, a quantity N of the first sub-layers is an even number, a first instance of the first sub-layers directly contacts the glass substrate, and an N-th instance of the second sub-layers directly contacts the light-transmitting conducting layer; and
a minimum distance from a surface of an (N/2)-th instance of the second sub-layers that is further from the glass substrate to the glass substrate is less than a distance from the surface of the (N/2)-th instance of the second sub-layers that is further from the glass substrate to the light-transmitting conducting layer.

7 . The display panel according to claim 6 , wherein a thickness of the first instance of the first sub-layers is less than a thickness of each of the other instances of the first sub-layers.

8 . The display panel according to claim 6 , wherein the tandem layer comprises two instances of the first sub-layers and two instances of the second sub-layers, and an absolute value of a difference between two times a thickness of the first instance of the first sub-layers and a thickness of a second instance of the first sub-layers is less than or equal to 4 nm.

9 . The display panel according to claim 6 , wherein an absolute value of a difference between a thickness of the first instance of the first sub-layers and a thickness of the light-transmitting conducting layer is less than or equal to 6 nm.

10 . The display panel according to claim 3 , wherein absolute values of differences between thicknesses of the second sub-layers are less than or equal to 12 nm.

11 . The display panel according to claim 1 , wherein a range of the refractive index of each of the first sub-layers is 1.8-2.2; a range of the refractive index of each of the second sub-layers is 1.4-1.6; and
a material of the first sub-layers comprises a nitride of silicon, and a material of the second sub-layers comprises an oxide of silicon.

12 . The display panel according to claim 3 , wherein the display panel further comprises a composite polarizing film, and the composite polarizing film is located at one side of the light-transmitting conducting layer that is further from the tandem layer; and
the composite polarizing film comprises a polarizer and a low-reflection layer, and the low-reflection layer is located at one side of the polarizer that is further from the light-transmitting conducting layer.

13 . The display panel according to claim 12 , wherein a ratio of a refractive index of air to a refractive index of the low-reflection layer is substantially equal to a ratio of the refractive index of the low-reflection layer to a refractive index of the polarizer.

14 . The display panel according to claim 12 , wherein a range of a refractive index of the composite polarizing film is 1.2-1.4.

15 . The display panel according to claim 1 , wherein the display panel further comprises a color-resistor layer, the color-resistor layer is located at one side of the glass substrate that is further from the tandem layer, the color-resistor layer comprises a black matrix pattern, and a refractive index of the black matrix pattern is less than or equal to 1.7.

16 . A display device, wherein the display device comprises the display panel according to claim 1 .

17 . The display device according to claim 16 , wherein the refractive index of each of the first sub-layers is greater than a refractive index of the glass substrate, and the refractive index of each of the second sub-layers is less than the refractive index of the glass substrate.

18 . The display device according to claim 17 , wherein the display panel further comprises a light-transmitting conducting layer, and the light-transmitting conducting layer is located at one side of the tandem layer that is further from the glass substrate; and
a refractive index of the light-transmitting conducting layer is greater than the refractive index of each of the second sub-layers, and the refractive index of the light-transmitting conducting layer is greater than the refractive index of the glass substrate.

19 . The display device according to claim 18 , wherein a thickness of each of at least some of the first sub-layers is less than or equal to a thickness of the light-transmitting conducting layer.

20 . The display device according to claim 18 , wherein thicknesses of the second sub-layers are equal.

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Bo Lingdan
• Qu Yingying
• Huang Jianhua
• Chen Dongchuan
• Qi Pengyu
• Yang Yue
• Li Hui

Classifications

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• G02F1/133528

  Polarisers · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title