Display device

Patent metadata

Field	Value
Publication number	US-11398183-B2
Application number	US-202117391645-A
Country	US
Kind code	B2
Filing date	Aug 2, 2021
Priority date	Aug 6, 2020
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

A display device is disclosed that provides a compensation function using a movable sensor structure. The display device may sense luminance characteristics of subpixels and reduce or eliminate luminance deviations between subpixels without performing complicated sensing driving on subpixels of the display panel. The display device includes: a display panel including data lines, a gate lines, and subpixels, each of the subpixels including a light emitting device and a driving transistor; a housing protecting the display panel; a moving bar installed in the housing so as to be movable and moving at a front of a viewing surface of the display panel; sensor modules mounted on the moving bar to face the viewing surface of the display panel; and a sensing controller configured to control movement of the moving bar, control an operation of the sensor modules, and receive sensing values of each of the sensor modules.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a plurality of data lines, a plurality of gate lines, and a plurality of subpixels, each of the plurality of subpixels including a light emitting device and a driving transistor;
a housing protecting the display panel;
a moving bar installed in the housing, the moving bar configured to be movable and moving at a front of a viewing surface of the display panel;
a plurality of sensor modules mounted on the moving bar, the plurality of sensor modules facing the viewing surface of the display panel; and
a sensing controller configured to control movement of the moving bar, control an operation of the plurality of sensor modules, and receive sensing values of each of the plurality of sensor modules.

2. The display device according to claim 1 , further comprising a data driving circuit configured to drive the plurality of data lines and a display controller configured to supply image data to the data driving circuit based on the image signal input from a host module, and
when the image signal is not supplied from the host module to the display controller, the moving bar moves and the plurality of sensor modules operate.

3. The display device according to claim 1 , further comprising a moving actuator device configured to move the moving bar up and down at the front of the viewing surface of the display panel.

4. The display device according to claim 3 , wherein the moving actuator device comprises:
a first shaft installed on an upper side of the display panel;
a second shaft installed on a lower side of the display panel;
a first wire having a first end coupled to a left side of the first shaft and a second end coupled to a left side of the second shaft to interlock the first shaft and the second shaft;
a second wire having a first end coupled to a right side of the first shaft and a second end coupled to a right side of the second shaft to interlock the first shaft and the second shaft;
a first motor rotating the first shaft; and
a second motor rotating the second shaft,
wherein a left side of the moving bar is coupled to the first wire, a right side of the moving bar is coupled to the second wire,
wherein as the second shaft rotates by the second motor, the first wire and the second wire are wound around the second shaft, and the moving bar descends, and
wherein as the first shaft rotates by the first motor, the first wire and the second wire are wound around the first shaft, and the moving bar rises.

5. The display device according to claim 4 , wherein the moving bar comprises a gap maintaining device that maintains a gap between the plurality of sensor modules and the display panel,
wherein the gap maintaining device comprises:
at least one fan device that sucks and discharges air in a space between the display panel and the moving bar; and
two or more spacers protruding toward the display panel.

6. The display device according to claim 3 , wherein the moving actuator device comprises:
a shaft installed on an upper side of the display panel;
a wire having a first end coupled to the moving bar and a second end coupled to the shaft; and
a motor that rotates the shaft,
wherein as the shaft rotates in a first direction by the motor, the wire is unwound from the shaft, and the moving bar descends,
wherein as the shaft rotates in a second direction opposite to the first direction by the motor, the wire is wound around the shaft, and the moving bar rises, and
wherein the housing comprises at least one guide groove through which at least one of a first end and a second end of the moving bar is inserted to guide sliding of the moving bar.

7. The display device according to claim 3 , wherein the moving actuator device comprises:
a first shaft installed on an upper side of the display panel;
a second shaft installed on a lower side of the display panel;
a conveyor installed on one of a left side and a right side of the display panel, wound around a first end of the first shaft and a first end of the second shaft and rotated, and coupled to the moving bar; and
a motor that rotates the first shaft or the second shaft,
wherein as the first shaft or the second shaft rotates in a first direction by the motor, the conveyor rotates, and the moving bar coupled to the conveyor descends, and
wherein as the first shaft or the second shaft rotates in a second direction opposite to the first direction by the motor, the conveyor rotates in an opposite direction, and the moving bar coupled to the conveyor rises.

8. The display device according to claim 1 , further comprising:
a printed circuit board on which the sensing controller is mounted and coupled to the housing; and
a flexible cable connecting the printed circuit board and the moving bar.

9. The display device according to claim 8 , wherein a length of the flexible cable is greater than or equal to a maximum moving distance of the moving bar.

10. The display device according to claim 1 , further comprising:
a first communication module mounted on the moving bar, the first communication module transmitting sensing values of each of the plurality of sensor modules; and
a second communication module receiving the sensing values from the first communication module and transmitting the sensing values to the sensing controller.

11. The display device according to claim 1 , wherein each of the plurality of sensor modules comprises:
a luminance sensor configured to sense a luminance of a point located on the viewing surface of the display panel according to the movement of the moving bar; and
a light controller positioned between the display panel and the luminance sensor, in which light emitted from the display panel is incident, and light within a predetermined angle with a vertical direction of the display panel is output.

12. The display device according to claim 11 , wherein the light controller comprises at least one of a first light control film that filters light in a first direction and a second light control film that filters light in a second direction that crosses the first direction.

13. The display device according to claim 11 , wherein the light controller comprises an optical filter including a transmissive layer and a non-transmissive layer,
wherein the non-transmissive layer comprises at least one of a front non-transmissive layer positioned on a front surface of the transmissive layer and a rear non-transmissive layer positioned on a rear surface of the transmissive layer, and
wherein a plurality of first slits are formed in the front non-transmissive layer, and a plurality of second slits are formed in the rear non-transmissive layer in a direction crossing the plurality of first slits.

14. The display device according to claim 1 , wherein the plurality of subpixels comprise a plurality of subpixel rows,
wherein a horizontal length of the moving bar is greater than or equal to a row direction length of one subpixel row among the plurality of subpixel rows, and
wherein a vertical length of the moving bar is greater than or equal to a column length of one subpixel row among the plurality of subpixel rows or greater than or equal to a column direction lengths of two or more subpixel rows among the plurality of subpixel rows.

15. The display device according to claim 1 , wherein at one time point in a period during which the moving bar moves, one of the plurality of subpixels overlaps with one of the plurality of sensor modules.

16. The display device according to claim 1 , wherein at one time point in a period during whic

Assignees

• Lg Display Co Ltd

Inventors

• Park Jongjin
• Oh Euiyeol
• Na Byeonghyeon
• Ryu Jungwon
• Lee Hankyeol

Classifications

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G2320/0233

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

• G09G2320/043

  Preventing or counteracting the effects of ageing · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title