Display panel and terminal device

Patent metadata

Field	Value
Publication number	US-2021063808-A1
Application number	US-201916699478-A
Country	US
Kind code	A1
Filing date	Nov 29, 2019
Priority date	Aug 30, 2019
Publication date	Mar 4, 2021
Grant date	—

Abstract

A display panel includes: a substrate, a pixel layer and a sensing layer. The pixel layer is disposed on the substrate. The pixel layer includes pixel units arranged in an array. The sensing layer is disposed on one side of the substrate away from the pixel layer or disposed on one side of the substrate close to the pixel layer and is configured to convert a received optical signal into an electrical signal.

First claim

1 . A display panel, comprising:
a substrate; a pixel layer disposed over the substrate and including pixel units arranged in an array; and a sensing layer comprising indium tin oxide (ITO) or bismuth tungstate (Bi 2 WO 6 ), integrally formed with the display panel and disposed at a side of the substrate distal from the pixel layer or disposed at a side of the substrate proximal to the pixel layer; wherein the sensing layer is configured to convert a received optical signal from ambient light into an electrical signal without being affected by light emitted by the display panel.

2 . The display panel according to claim 1 , wherein
there is no overlap area between a projection of the sensing layer on the substrate and a projection of the pixel unit on the substrate.

3 . The display panel according to claim 1 , further comprising:
a visible light selective transmission layer disposed on the sensing layer and configured to allow visible light in a specified wavelength range in an ambient light to pass through and transmit the visible light to the sensing layer.

4 . The display panel according to claim 3 ,
wherein the pixel unit includes subpixel units of N colors;
the sensing layer includes N sub-sensing layers;
the N sub-sensing layers include an i th sub-sensing layer, in which 1≤i≤N and N is a positive integer;
the visible light selective transmission layer includes N sub-visible light selective transmission layers; the N sub-visible light selective transmission layers include an i th sub-visible light selective transmission layer;
wherein the i th sub-visible light selective transmission layer is disposed on the i th sub-sensing layer and allows visible light in an i th wavelength range to pass through; and a wavelength range of light emitted by a subpixel unit of an i th color is the same with the i th wavelength range.

5 . The display panel according to claim 3 , wherein the projection of the sensing layer on the substrate falls within a projection of the visible light selective transmission layer on the substrate.

6 . The display panel according to claim 1 , wherein the pixel layer includes:
a liquid crystal layer disposed on the substrate; a color filter layer being disposed on the liquid crystal layer and including subpixel units of N colors arranged in an array; and a black matrix disposed between adjacent subpixel units; the sensing layer is disposed on the black matrix and disposed on one side of the black matrix away from the liquid crystal layer.

7 . The display panel according to claim 2 , wherein the pixel layer includes:
a liquid crystal layer disposed on the substrate; a color filter layer being disposed on the liquid crystal layer and including subpixel units of N colors arranged in an array; and a black matrix disposed between adjacent subpixel units; the sensing layer is disposed on the black matrix and disposed on one side of the black matrix away from the liquid crystal layer.

8 . The display panel according to claim 3 , wherein the pixel layer includes:
a liquid crystal layer disposed on the substrate; a color filter layer being disposed on the liquid crystal layer and including subpixel units of N colors arranged in an array; and a black matrix disposed between adjacent subpixel units; the sensing layer is disposed on the black matrix and disposed on one side of the black matrix away from the liquid crystal layer.

9 . The display panel according to claim 4 , wherein the pixel layer includes:
a liquid crystal layer disposed on the substrate; a color filter layer being disposed on the liquid crystal layer and including subpixel units of N colors arranged in an array; and a black matrix disposed between adjacent subpixel units; the sensing layer is disposed on the black matrix and disposed on one side of the black matrix away from the liquid crystal layer.

10 . The display panel according to claim 5 , wherein the pixel layer includes:
a liquid crystal layer disposed on the substrate; a color filter layer being disposed on the liquid crystal layer and including subpixel units of N colors arranged in an array; and a black matrix disposed between adjacent subpixel units; the sensing layer is disposed on the black matrix and disposed on one side of the black matrix away from the liquid crystal layer.

11 . The display panel according to claim 1 , wherein the pixel layer includes an organic light-emitting layer; the display panel further comprises:
an array layer disposed between the substrate and the organic light-emitting layer; when the sensing layer is disposed on one side of the substrate away from the pixel layer, the substrate is a transparent substrate, and a light transmittance of the array layer is greater than a specified light transmittance; and/or when the sensing layer is disposed on one side of the substrate close to the pixel layer, the sensing layer is disposed between the substrate and the array layer.

12 . The display panel according to claim 2 , wherein the pixel layer includes an organic light-emitting layer; the display panel further comprises:
an array layer disposed between the substrate and the organic light-emitting layer; when the sensing layer is disposed on one side of the substrate away from the pixel layer, the substrate is a transparent substrate, and a light transmittance of the array layer is greater than a specified light transmittance; and/or when the sensing layer is disposed on one side of the substrate close to the pixel layer, the sensing layer is disposed between the substrate and the array layer.

13 . The display panel according to claim 3 , wherein the pixel layer includes an organic light-emitting layer; the display panel further comprises:
an array layer disposed between the substrate and the organic light-emitting layer; when the sensing layer is disposed on one side of the substrate away from the pixel layer, the substrate is a transparent substrate, and a light transmittance of the array layer is greater than a specified light transmittance; and/or when the sensing layer is disposed on one side of the substrate close to the pixel layer, the sensing layer is disposed between the substrate and the array layer.

14 . The display panel according to claim 4 , wherein the pixel layer includes an organic light-emitting layer; the display panel further comprises:
an array layer disposed between the substrate and the organic light-emitting layer; when the sensing layer is disposed on one side of the substrate away from the pixel layer, the substrate is a transparent substrate, and a light transmittance of the array layer is greater than a specified light transmittance; and/or when the sensing layer is disposed on one side of the substrate close to the pixel layer, the sensing layer is disposed between the substrate and the array layer.

15 . The display panel according to claim 5 , wherein the pixel layer includes an organic light-emitting layer; the display panel further comprises:
an array layer disposed between the substrate and the organic light-emitting layer; when the sensing layer is disposed on one side of the substrate away from the pixel layer, the substrate is a transparent substrate, and a light transmittance of the array layer is greater than a specified light transmittance; and/or when the sensing layer is disposed on one side of the substrate close to the pixel layer, the sensing layer is disposed between the substrate and the array layer.

16 . The display panel according to claim 1 , wherein a projection area of the sensing layer on

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• He Quanhua

Classifications

• G02F1/13318 Primary

  Circuits comprising a photodetector · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/133512

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

• H01L27/3211

  Electricity · mapped topic

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title