IP Library Granted Patent US 9,398,246
Granted Patent B2
US 9,398,246 · App. 13/886,982 · Granted Jul 19, 2016

Display device, method of driving display device, and program

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Quick Facts
Patent No.
US 9,398,246
App. No.
13/886,982
Granted
Jul 19, 2016
Kind
B2
Abstract

Provided is a display device including a panel ( 158 ) in which a plurality of pixels that emit light in response to a video signal are arranged, a light emission amount calculation unit ( 164 ) that acquires a light emission amount on a plurality of positions of the panel ( 158 ) based on a video signal supplied to the panel ( 158 ), a storage unit ( 150 ) that accumulates data related to the light emission amount accumulated based on a video signal of a plurality of frames, a high-brightness gamma adjustment block ( 172 b ) that reduces brightness of a high brightness side of the video signal supplied to the panel ( 158 ) based on the data related to the light emission amount accumulated in storage unit ( 150 ), and a low-gradation gamma adjustment block ( 172 c ) that reduces brightness of a low brightness side of the video signal in conjunction with a reduction in brightness of the high brightness side.

Claims (44)

1. A display device, comprising:

a display in which a plurality of pixels that emit light in response to a video signal are arranged; and

circuitry configured to

acquire a light emission amount corresponding to a plurality of positions of the plurality of pixels of the display based on a video signal supplied to the display,

accumulate data related to the light emission amount accumulated based on a video signal of a plurality of frames, the data related to the light emission amount including calculated degrees of burn-in risk corresponding to the plurality of positions, and

reduce brightness of the display, associated with the video signal supplied to the display, based on the accumulated data related to the light emission amount.

2. The display device of claim 1 , wherein the circuitry is configured to

reduce brightness of a high brightness side of the display, associated with the video signal, based on the accumulated data related to the light emission amount, and

reduce brightness of a low brightness side of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side.

3. The display device of claim 2 , wherein the circuitry is configured to

reduce the brightness of the high brightness side by a first coefficient, and

reduce the brightness of the low brightness side by a second coefficient, the second coefficient being different from the first coefficient.

4. The display device of claim 2 , wherein the circuitry is configured to

further reduce brightness of the high brightness side as the accumulated light emission amount is larger, based on the accumulated data related to the light emission amount.

5. The display device of claim 2 , wherein the circuitry is configured to

further reduce an overall brightness of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side and the low brightness side.

6. A method of driving a display device, comprising:

acquiring a light emission amount corresponding to a plurality of positions of a plurality of pixels that emit light, the plurality of pixels arranged in a display, based on a video signal supplied to the display;

accumulating data related to the light emission amount accumulated based on a video signal of a plurality of frames, the data related to the light emission amount including calculated degrees of burn-in risk corresponding to the plurality of positions; and

reducing brightness of the display, associated with the video signal supplied to the display, based on the accumulated data related to the light emission amount.

7. The method of claim 6 , further comprising:

reducing brightness of a high brightness side of the display, associated with the video signal, based on the accumulated data related to the light emission amount; and

reducing brightness of a low brightness side of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side.

8. The method of claim 7 , wherein

the reducing reduces the brightness of the high brightness side by a first coefficient, and

the reducing reduces the brightness of the low brightness side by a second coefficient, the second coefficient being different from the first coefficient.

9. The method of claim 7 , wherein

the reducing further reduces the brightness of the high brightness side as the accumulated light emission amount is larger, based on the accumulated data related to the light emission amount.

10. The method of claim 7 , further comprising:

reducing an overall brightness of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side and the low brightness side.

11. A non-transitory computer readable storage medium encoded with computer program instructions which when executed by a computer cause the computer to execute a method of driving a display device, the method comprising:

acquiring a light emission amount corresponding to a plurality of positions of a plurality of pixels that emit light, the plurality of pixels arranged in a display, based on a video signal supplied to the display;

accumulating data related to the light emission amount accumulated based on a video signal of a plurality of frames, the data related to the light emission amount including calculated degrees of burn-in risk corresponding to the plurality of positions; and

reducing brightness of the display, associated with the video signal supplied to the display, based on the accumulated data related to the light emission amount.

12. The non-transitory computer readable storage medium of claim 11 , the method further comprising:

reducing brightness of a high brightness side of the display, associated with the video signal, based on the accumulated data related to the light emission amount; and

reducing brightness of a low brightness side of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side.

13. The non-transitory computer readable storage medium of claim 12 , wherein

the reducing reduces the brightness of the high brightness side by a first coefficient, and

the reducing reduces the brightness of the low brightness side by a second coefficient, the second coefficient being different from the first coefficient.

14. The non-transitory computer readable storage medium of claim 12 , wherein

the reducing further reduces the brightness of the high brightness side as the accumulated light emission amount is larger, based on the accumulated data related to the light emission amount.

15. The non-transitory computer readable storage medium of claim 12 , the method further comprising:

reducing an overall brightness of the display, associated with the video signal, in conjunction with a reduction in brightness of the high brightness side and the low brightness side.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2025
From: JDI DESIGN AND DEVELOPMENT G.K.
To: MAGNOLIA BLUE CORPORATION
Reel/Frame 072039/0656 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2024
From: JOLED, INC.
To: JDI DESIGN AND DEVELOPMENT G.K.
Reel/Frame 066382/0619 →
CORRECTION BY AFFIDAVIT FILED AGAINST REEL/FRAME 063396/0671 Recorded Jun 12, 2023
From: JOLED, INC.
To: JOLED, INC.
Reel/Frame 064067/0723 →
SECURITY INTEREST Recorded Apr 20, 2023
From: JOLED, INC.
To: INCJ, LTD.
Reel/Frame 063396/0671 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 11, 2015
From: SONY CORPORATION
To: JOLED INC.
Reel/Frame 035604/0268 →