Display device

Patent metadata

Field	Value
Publication number	US-12315429-B2
Application number	US-202217967136-A
Country	US
Kind code	B2
Filing date	Oct 17, 2022
Priority date	Dec 22, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A display device includes a display panel including a plurality of light emitting elements, a moving bar movable on a rear surface of the display panel, and a plurality of sensor modules mounted on the moving bar and configured to sense sensing light emitted from a rear surface of the display panel.

First claim

What is claimed is:

1. A display device, comprising:
a display panel including a substrate on which a plurality of light emitting elements, are disposed;
a plurality of sensor modules configured to sense light passing through a rear surface of the display panel, which is opposite to a viewing surface of the display panel; and
a sensing controller configured to receive a sensing value from at least one of the plurality of sensor modules,
wherein the display panel further includes a plurality of sensing light emission holes for directing the light emitted from the plurality of light emitting elements to the rear surface of the display panel, and
wherein at least one sensor module among the plurality of sensor modules is configured to receive the light emitted directly from at least one light emitting element among the plurality of light emitting elements through at least one sensing light emission hole among the plurality of sensing light emission holes without an intervening layer between the at least one sensor module and the at least one light emitting element,
wherein one end of each of the plurality of sensing light emission holes passes through a portion of the substrate, and another end thereof contacts a pixel electrode of a corresponding one of the plurality of light emitting elements.

2. The display device of claim 1 , wherein each of the plurality of sensing light emission holes overlaps with at least three sensor modules.

3. The display device of claim 1 , wherein each of the plurality of sensing light emission holes is disposed in each subpixel.

4. The display device of claim 1 , wherein each of the plurality of sensing light emission holes is disposed in each pixel having at least two subpixels.

5. The display device of claim 1 , wherein the plurality of sensing light emission holes includes a plurality of horizontal line-shaped sensing light emission holes and a plurality of vertical line-shaped sensing light emission holes, and
wherein the plurality of horizontal line-shaped sensing light emission holes and the plurality of vertical line-shaped sensing light emission holes are alternately arranged.

6. The display device of claim 1 , wherein each of the plurality of sensing light emission holes has a diagonal line shape.

7. The display device of claim 1 , wherein the display panel comprises:
a display light emission path layer being a path through which display light is emitted to the viewing surface of the display panel; and
a sensing light emission path layer being a path through which the light is emitted to the rear surface of the display panel, which is opposite to the viewing surface of the display panel,
wherein the sensing light emission path layer includes the plurality of sensing light emission holes.

8. The display device of claim 1 , wherein the display panel includes:
a plurality of pixel electrodes;
a plurality of light emitting layers disposed on the plurality of pixel electrodes;
a common electrode positioned on the plurality of light emitting layers and formed of a transparent metal;
an encapsulation layer positioned on the common electrode; and
a plurality of transistors positioned under the plurality of pixel electrodes and connected to the plurality of pixel electrodes,
wherein the plurality of pixel electrodes are formed of a reflective metal,
wherein the plurality of sensing light emission holes pass through a plurality of insulation layers positioned under the plurality of pixel electrodes, and
wherein each of the plurality of sensing light emission holes is positioned between the plurality of transistors.

9. The display device of claim 1 , wherein each of the plurality of sensor modules includes:
a luminance sensor configured to sense luminance of the light; and
a light controller positioned between the rear surface of the display panel and the luminance sensor for transferring the light emitted from the at least one light emitting element to the luminance sensor.

10. The display device of claim 1 , further comprising a moving bar movable on the rear surface of the display panel under the control of the sensing controller,
wherein a sensor module is mounted on the moving bar.

11. The display device of claim 10 , wherein a moving distance of the moving bar corresponds to an integer multiple of an inter-center interval between sensing light emission holes adjacent in a vertical direction.

12. The display device of claim 10 , further comprising:
a moving guide device including a scanning rail moving together with the moving bar; and
a motor for rotating a shaft on which the scanning rail is wound or unwound.

13. The display device of claim 10 , wherein the sensing controller is configured to:
control to display a sensing image on the display panel,
control one or more of a moving speed and moving direction of the moving bar,
control a sensing operation of each of the plurality of sensor modules,
receive a sensing value for luminance from at least one of the plurality of sensor modules,
generate a compensation value based on the received sensing value, and
store the generated compensation value.

14. The display device of claim 13 , wherein the sensing image is displayed on an entire display area of the display panel or displayed on a partial area of the display area while the moving bar moves, and
wherein the partial area is moved according to the movement of the moving bar and overlaps the moving bar when the sensing image is displayed on the partial area of the display area.

15. The display device of claim 10 , wherein the moving bar is moved and the plurality of sensor modules are operated while a sensing image different from an image viewed by a user is displayed on the display panel.

16. The display device of claim 1 , wherein each light emitting element includes a transparent electrode disposed at a distal end of the at least one sensing light emission hole.

17. The display device of claim 1 , wherein the at least one light emission hole guides the light emitted from at least one light emitting element to the at least one sensor module to detect luminance deviation of the plurality of light emitting elements.

18. A display device, comprising:
a display panel including a substrate on which a plurality of light emitting elements are disposed, and including a plurality of sensing light emission holes through which light is emitted to a rear surface opposite to a viewing surface;
a plurality of sensor modules configured to sense light emitted through at least one of the plurality of sensing light emission holes; and
a sensing controller configured to receive a sensing value from at least one of the plurality of sensor modules,
wherein at least one sensor module is configured to receive the light emitted directly from at least one light emitting element among the plurality of light emitting elements through at least one sensing light emission hole without an intervening layer between the at least one sensor module and the at least one light emitting element,
wherein one end of each of the plurality of sensing light emission holes passes through a portion of the substrate, and another end thereof contacts a pixel electrode of a corresponding one of the plurality of light emitting elements.

19. The display device of claim 18 , further comprising a moving bar movable on the rear surface of the display panel,
wherein the plurality of sensor modules are mounted on the moving bar.

20. The display device of claim 19 , wherein a moving d

Assignees

• Lg Display Co Ltd

Inventors

• Kim Jinkoo
• Park Jongjin
• Hong Changeui
• Kim Seongjo

Classifications

• G09G2320/0233

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

• G09G2360/14

  Detecting light within display terminals, e.g. using a single or a plurality of photosensors · CPC title

• G09G2300/0465

  Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness · CPC title

• H10K59/60

  OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes · CPC title

• G09G3/2074

  using sub-pixels · CPC title