IP Library › Granted Patent US 11,386,857
Granted Patent B2
US 11,386,857 · App. 16/841,184 · Granted Jul 12, 2022

Display device including a plurality of image adjustment circuits

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Quick Facts
Patent No.
US 11,386,857
App. No.
16/841,184
Filed
Apr 6, 2020
Granted
Jul 12, 2022
Kind
B2
Art Unit
2691
USPC
345/690
Abstract

A display device performs a comparison process of comparing first adjusted image data and second adjusted image data. The first adjusted image data is adjusted image data obtained by a first image adjustment element performing an image adjustment process on image data to be processed. The second adjusted image data is adjusted image data obtained by a second image adjustment element performing the image adjustment process on the image data to be processed.

Claims (38)

1. A display device comprising

a plurality of image adjustment circuits to perform an image adjustment process of adjusting image data, wherein

the plurality of image adjustment circuits include a first image adjustment circuit and a second image adjustment circuit,

the first image adjustment circuit performs the image adjustment process on an image data to be processed to obtain a first adjusted image data,

the second image adjustment circuit performs the image adjustment process on the image data that is processed by the first image adjustment circuit to obtain a second adjusted image data,

the display device performs a comparison process of comparing the first adjusted image data and the second adjusted image data,

each of the first image adjustment circuit and the second image adjustment circuit performs the comparison process,

in a first time period during which the first image adjustment circuit performs the image adjustment process, the second image adjustment circuit performs the image adjustment process to obtain the second adjusted image data to be used by the first image adjustment circuit in the comparison process,

in a second time period during which the second image adjustment circuit performs the image adjustment process, the first image adjustment circuit performs the image adjustment process to obtain the first adjusted image data to be used by the second image adjustment circuit in the comparison process, and

the first time period and the second time period do not overlap each other.

2. The display device according to claim 1 , wherein

each of the first image adjustment circuit and the second image adjustment circuit includes a source controller to control a source voltage as a voltage for the display device to display an image based on the adjusted image data.

3. The display device according to claim 2 , wherein

the source controller performs D/A conversion on a digital value indicated by the adjusted image data, and

the source controller performs the comparison process using the digital value on which the D/A conversion is not performed.

4. The display device according to claim 1 , wherein

when a result of the comparison process indicates that the first adjusted image data and the second adjusted image data do not match, the display device determines that an anomaly is occurring in the display device.

5. The display device according to claim 4 , wherein

when it is determined that the anomaly is occurring, the display device outputs an anomaly signal.

6. The display device according to claim 4 , further comprising

a register to store information, wherein

when it is determined that the anomaly is occurring, the display device stores, in the register, information indicating that the anomaly is occurring.

7. The display device according to claim 6 , wherein

the register is configured to be accessible by an external device from outside the display device.

8. The display device according to claim 1 , wherein

the display device repeatedly performs the comparison process, and

when the comparison process is repeatedly performed to yield a result indicating that the first adjusted image data and the second adjusted image data do not match a plurality of times, the display device determines that an anomaly is occurring in the display device.

9. The display device according to claim 1 , wherein

the display device performs the comparison process of comparing a part of the first adjusted image data and a part of the second adjusted image data.

10. The display device according to claim 1 , wherein

the display device performs the comparison process including a process of comparing a first parameter value to be used by the first image adjustment circuit to perform the image adjustment process and a second parameter value to be used by the second image adjustment circuit to perform the image adjustment process.

11. The display device according to claim 1 , wherein

the first image adjustment circuit performs the image adjustment process to obtain the first adjusted image data,

the first image adjustment circuit obtains the second adjusted image data from the second image adjustment circuit,

the second image adjustment circuit performs the image adjustment process to obtain the second adjusted image data, and

the second image adjustment circuit obtains the first adjusted image data from the first image adjustment circuit.

12. The display device according to claim 1 , wherein

the display device performs the comparison process in a time period during which the display device does not perform the image adjustment process.