Stacked-screen display device and method for controlling display device

Patent metadata

Field	Value
Publication number	US-12592204-B2
Application number	US-202418763850-A
Country	US
Kind code	B2
Filing date	Jul 3, 2024
Priority date	Dec 25, 2020
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A stacked-screen display device and a method for controlling a display device are provided. The stacked-screen display device includes a backlight module, a light control panel and a display panel which are stacked in sequence, where the backlight module includes a backplane, a reflector and a diffuser which are stacked in sequence, and the reflector is provided with a plurality of light-emitting units, the backlight module is provided with temperature sensors, the temperature sensors are configured to detect the temperature of the backlight module to compensate the display panel according to the temperature.

First claim

What is claimed is:

1 . A display device, comprising: a backlight module, wherein the backlight module comprises a backplane, a reflector and a diffuser which are stacked in sequence, and the reflector is provided with a plurality of light-emitting units, the backlight module is provided with temperature sensors;
wherein the reflector has a first central axis and a second central axis which are perpendicular to each other; the temperature sensors are arranged on a side of the reflector close to the diffuser and the temperature sensors are symmetrically distributed with respect to the first central axis; wherein the reflector further comprises two diagonal lines, the diagonal lines intersect with the first central axis and the second central axis, and the temperature sensors are arranged on each of the diagonal lines.

2 . The display device according to claim 1 , wherein the reflector is in a shape of rectangular; and the temperature sensors are symmetrically distributed with respect to the second central axis.

3 . The display device according to claim 2 , wherein the reflector is divided into four rectangular sub-areas by the first central axis and the second central axis, and the temperature sensors are symmetrically distributed in each sub-area with respect to two central axes of the sub-area.

4 . The display device according to claim 3 , wherein a quantity of temperature sensors is four, and the four temperature sensors are each located at a geometric center of the sub-area.

5 . The display device according to claim 1 , wherein the light-emitting units are arranged on the reflector at equal intervals along a first direction and a second direction, respectively, to form an array of light-emitting units, wherein the first direction and the second direction are different directions, the temperature sensors are located at a geometric center of the nearest four lighting units.

6 . The display device according to claim 1 , wherein the quantity of temperature sensors is four, and the four temperature sensors are respectively located at four vertices of the backlight module.

7 . The display device according to claim 6 , wherein at an edge of the backlight module, the reflector forms a bending portion bending away from the backplane, a rubber frame is provided between the bending portion and the backplane, at least part of a surface of the rubber frame extends along a surface of the backplane and a surface of the bending portion, and respectively abuts against the backplane and the reflector, an accommodating cavity is formed inside the rubber frame, and the temperature sensors are located inside the accommodating cavity.

8 . The display device according to claim 7 , wherein a backing plate is further provided between the backplane and the reflector, the backing plate comprises an edge portion extending between the bending portion and the backplane, and two opposite surfaces of the edge portion respectively abuts against the rubber frame and the backplane; the temperature sensors are arranged at a portion of the rubber frame abutting against the edge portion, and the temperature sensors are located on a surface of a side of the rubber frame away from the backplane.

9 . The display device according to claim 1 , wherein each of the temperature sensors comprises an input end for obtaining an input signal, an output end for outputting a temperature signal and a plurality of address ends for obtaining address signals, input ends of a plurality of temperature sensors are connected to an input voltage end providing the same input signal, the output ends of the plurality of temperature sensors are all connected to an output bus, and address signals corresponding to each of the temperature sensors are obtained through the plurality of address ends.

10 . The display device according to claim 1 , wherein the temperature sensors are configured to detect a temperature of the backlight module to compensate the display panel according to the temperature.

11 . The display device according to claim 2 , wherein the light-emitting units are arranged on the reflector at equal intervals along a first direction and a second direction, respectively, to form an array of light-emitting units, wherein the first direction and the second direction are different directions, the temperature sensors are located at a geometric center of the nearest four lighting units.

12 . The display device according to claim 3 , wherein the light-emitting units are arranged on the reflector at equal intervals along a first direction and a second direction, respectively, to form an array of light-emitting units, wherein the first direction and the second direction are different directions, the temperature sensors are located at a geometric center of the nearest four lighting units.

13 . The display device according to claim 4 , wherein the light-emitting units are arranged on the reflector at equal intervals along a first direction and a second direction, respectively, to form an array of light-emitting units, wherein the first direction and the second direction are different directions, the temperature sensors are located at a geometric center of the nearest four lighting units.

14 . A display device, comprising:
a backlight module, a light control panel and a display panel which are stacked in sequence, wherein the backlight module comprises a backplane, a reflector and a diffuser which are stacked in sequence, and the reflector is provided with a plurality of light-emitting units, the backlight module is provided with temperature sensors; wherein the reflector has a first central axis and a second central axis which are perpendicular to each other; the temperature sensors are arranged on a side of the reflector close to the diffuser and the temperature sensors are symmetrically distributed with respect to the first central axis; wherein the reflector further comprises two diagonal lines, the diagonal lines intersect with the first central axis and the second central axis, and the temperature sensors are arranged on each of the diagonal lines.

15 . The display device according to claim 14 , wherein the reflector is in a shape of rectangular; and the temperature sensors are symmetrically distributed with respect to the second central axis.

16 . The display device according to claim 15 , wherein the reflector is divided into four rectangular sub-areas by the first central axis and the second central axis, and the temperature sensors are symmetrically distributed in each sub-area with respect to two central axes of the sub-area.

17 . The display device according to claim 16 , wherein a quantity of temperature sensors is four, and the four temperature sensors are each located at a geometric center of the sub-area.

18 . The display device according to claim 14 , wherein the light-emitting units are arranged on the reflector at equal intervals along a first direction and a second direction, respectively, to form an array of light-emitting units, wherein the first direction and the second direction are different directions, the temperature sensors are located at a geometric center of the nearest four lighting units.

19 . The display device according to claim 14 , wherein the quantity of temperature sensors is four, and the four temperature sensors are respectively located at four vertices of the backlight module.

20 . The display device according to claim 19 , wherein at an edge of the backlight module, the reflector forms a bending portion bending a

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Chen Xin
• Diao Kai
• Hou Qingna
• Chen Meizhen
• Xie Hongzhou
• YU Renhui
• Tian Ying
• Liu Xiaoyang
• Yu Hui
• Liu Chengkun

Classifications

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• G02F1/133382

  Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell · CPC title