Display device and method of operating the same

Patent metadata

Field	Value
Publication number	US-12183252-B2
Application number	US-202217864915-A
Country	US
Kind code	B2
Filing date	Jul 14, 2022
Priority date	Sep 7, 2021
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A display device and method of operating the display device is disclosed. The display device and method accurately compensate for the degradation of subpixels by monitoring the degradation in real time using an optical electronic device located under, or at a lower portion of, a display panel and partially overlapping an optical area in the display area. Such monitoring of the degradation can be performed in real time using such an optical element or device even in a situation where the display device is used, and the compensation of the degradation can be performed in real time in accordance with the result of the monitoring.

First claim

What is claimed is:

1. A display device comprising:
a display panel comprising a display area including a plurality of light emitting areas corresponding to a plurality of subpixels, and a non-display area located outside of the display area;
one or more optical electronic devices located under, or at a lower portion of, the display panel; and
a data driving circuit configured to supply a data voltage corresponding to input image data to the display panel,
wherein the display area comprises one or more optical areas that partially overlap the one or more optical electronic devices, and a non-optical area located outside of the one or more optical areas,
wherein the one or more optical areas comprises a plurality of first light emitting areas of the plurality of light emitting areas and a plurality of light transmission areas, and
the non-optical area comprises a plurality of second light emitting areas of the plurality of light emitting areas, and
wherein the one or more optical electronic devices overlaps at least a portion of the plurality of first light emitting areas in the one or more optical areas, and performs an image capturing operation or a sensing operation through the one or more optical areas during one of a first period in which the display device is not used or a second period proceeded by an input related to screen setting,
wherein the first period is one of a period in which power of the display device is turned off, a period in which the display device is in a lock screen state, or a period in which the display device is in a standby mode state, and the second period is a period proceeded by an input related to screen setting for degradation compensation,
wherein the one or more optical areas includes:
a first optical area; and
a second optical area,
wherein the one or more optical electronic devices includes a camera disposed in the first optical area and a luminance sensor disposed in the second optical area,
wherein the camera performs the image capturing operation or the sensing operation when a luminance of an environment of the display device sensed by the luminance sensor is less than a threshold luminance, and
wherein a degree of transmission of the first optical area is greater than a degree of transmission of the second optical area.

2. The display device according to claim 1 , wherein the one or more optical electronic devices comprise one or more of a camera or a luminance sensor.

3. The display device according to claim 1 , wherein when the camera performs the image capturing operation or the sensing operation through the first optical area, a predetermined image is displayed on an entirety of the display area or on the one or more optical areas,
wherein the predetermined image has a first luminance at a first time, and has a second luminance at a second time after the first time, and
wherein the second luminance is less than the first luminance.

4. The display device according to claim 1 , wherein after the image capturing operation or the sensing operation of the camera through the first optical area is performed, the input image data or the data voltage are changed.

5. The display device according to claim 4 , wherein the data voltage is supplied to a sub-pixel in the non-optical area.

6. The display device according to claim 4 , wherein the data voltage is supplied to a sub-pixel in the one or more optical areas.

7. The display device according to claim 1 , further comprising a degradation modeling lookup table that is updated after the image capturing operation or the sensing operation of the camera through the first optical area is performed.

8. The display device according to claim 1 , further comprising a real-time degradation compensation system comprising:
a degradation monitoring situation determination circuit configured to determine whether degradation monitoring is available or degradation monitoring needed;
a display control circuit configured to control that an image is not displayed on the display panel responsive to determining that degradation monitoring is available or degradation monitoring is needed;
a real-time degradation modeling circuit configured to control the camera to execute the image capturing operation or the sensing operation and predict at least one degradation level of at least one subpixel in the one or more optical areas based on the measured luminance of the one or more optical areas through a result of the execution of the image capturing operation or the sensing operation; and
a degradation compensator configured to perform compensate for degradation of subpixels comprised in each of the non-optical area and the one or more optical areas based on the predicted at least one degradation level.

9. The display device according to claim 8 , wherein the real-time degradation modeling circuit comprises:
a subpixel usage calculator configured to calculate usage of subpixels in the one or more optical areas;
a luminance measurement device configured to measure luminance of the one or more optical areas based on the result of the execution of the image capturing operation or the sensing operation of the camera;
a subpixel degradation predictor configured to predict degradation levels of the subpixels in the one or more optical areas based on the calculated usage and the measured luminance; and
a degradation modeling lookup table manager configured to manage a degradation modeling lookup table based on the predicted degradation levels.

10. A method of operating a display device comprising a display panel comprising a display area comprising a plurality of light emitting areas corresponding to a plurality of subpixels, and a non-display area located outside of the display area, a data driving circuit configured to supply a data voltage corresponding to input image data to the display panel, and one or more optical electronic devices including a camera disposed in a first optical area and a luminance sensor disposed in a second optical area that has a degree of transmission that is less than a degree of transmission of the first optical area, the method comprising:
determining whether the display device operates in a first period in which the display device is not used or a second period proceeded by an input related to screen setting; and
executing an image capturing operation or a sensing operation by the camera during the first period or the second period when a luminance of an environment of the display device sensed by the luminance sensor is less than a threshold luminance,
wherein the display area comprises one or more optical areas including the first optical area and the second optical area are partially overlapping the one or more optical electronic devices, and a non-optical area located outside of the one or more optical areas,
wherein the one or more optical areas comprises a plurality of first light emitting areas of the plurality of light emitting areas and a plurality of light transmission areas, and
the non-optical area comprises a plurality of second light emitting areas of the plurality of light emitting areas, and
wherein the one or more optical electronic devices overlap at least a portion of the plurality of first light emitting areas in the one or more optical areas,
wherein the first period is one of a period in which power of the display device is turned off, a period in which the display device is in a lock screen state, or a period in which the display device is in a standby mode state, and the second period is a period proceeded by an input related to screen setting for degradation compensation.

11. The method according to claim 10 , further comprising displaying a predetermine

Assignees

• Lg Display Co Ltd

Inventors

• Park Jihoon
• Oh Euiyeol
• Cha Donghoon
• Yu Sungbok
• Hong Changeui

Classifications

• G09G2360/144

  the light being ambient light · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G09G2320/043

  Preventing or counteracting the effects of ageing · CPC title

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title