Video monitoring method, display device, and display system

Patent metadata

Field	Value
Publication number	US-10832604-B2
Application number	US-201616094531-A
Country	US
Kind code	B2
Filing date	Apr 22, 2016
Priority date	Apr 22, 2016
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A display device includes a signal detector for detecting gradation pixel data input to a display having multiple pixels, a current detector for detecting currents supplied to at least part of the pixels included in the multiple pixels, and an output part for outputting current data corresponding to currents supplied to the part of the pixels and signal data corresponding to gradation pixel data used for the part of the pixels. Accordingly, it is possible to compare current data with signal data, and therefore, it is possible to confirm whether or not video signals are correctly displayed on a screen.

First claim

The invention claimed is:

1. A video monitoring method comprising:
detecting gradation pixel data input to a display having a plurality of pixels;
detecting a current supplied to part of pixels among the plurality of pixels; and
outputting current data corresponding to the current supplied to the part of pixels and signal data corresponding to the gradation pixel data used for the part of pixels,
wherein the signal data comprises addition data produced by adding the gradation pixel data and the gradation pixel data being delayed by one frame.

2. The video monitoring method according to claim 1 , further comprising determining whether or not a video of the gradation pixel data is displayed using the current data and the signal data.

3. The video monitoring method according to claim 2 , wherein it is determined that the video of the gradation pixel data is displayed when the current data matches the signal data.

4. The video monitoring method according to claim 1 , wherein the part of pixels includes pixels aligned in a line within the plurality of pixels.

5. The video monitoring method according to claim 1 , wherein the current data is produced by normalizing the current.

6. The video monitoring method according to claim 1 , wherein the signal data is produced by normalizing the addition data.

7. The video monitoring method according to claim 1 , wherein the current is detected in a predetermined time within a detected frame of the gradation pixel data, and wherein upon detecting the gradation pixel data, a variation of a signal level for each pixel is detected by comparing the detected frame and a reference frame relative to the detected frame.

8. The video monitoring method according to claim 7 , further comprising:
inputting a video signal to the display; and
generating the gradation pixel data based on the video signal,
wherein the predetermined time is a horizontal period of the video signal.

9. The video monitoring method according to claim 1 , further comprising determining whether or not a status of a video signal input to the display matches a status of an input video signal.

10. The video monitoring method according to claim 1 , wherein the current data and the signal data are output and written on a storage medium.

11. The video monitoring method according to claim 1 , wherein the current comprises a current consumed to display the gradation pixel data.

12. The video monitoring method according to claim 1 , further comprising determining whether or not a lighting status of a backlight attached to the display is correct.

13. A display device comprising:
a signal detector configured to detect gradation pixel data input to a display having a plurality of pixels;
a current detector configured to detect a current supplied to part of pixels among the plurality of pixels; and
an output part configured to output current data corresponding to the current supplied to the part of pixels and signal data corresponding to the gradation pixel data used for the part of pixels,
wherein the signal data comprises addition data produced by adding the gradation pixel data and the gradation pixel data being delayed by one frame.

14. A display system comprising:
a video transmission part configured to output a video signal;
a signal detector configured to detect gradation pixel data included in the video signal input to a display having a plurality of pixels;
a current detector configured to detect a current supplied to part of pixels among the plurality of pixels; and
an output part configured to output current data corresponding to the current supplied to the part of pixels and signal data corresponding to the gradation pixel data used for the part of pixels,
wherein the signal data comprises addition data produced by adding the gradation pixel data and the gradation pixel data being delayed by one frame.

Assignees

• Nec Display Solutions Ltd

Inventors

• Kobayashi Hironori

Classifications

• H04N17/04 Primary

  for receivers · CPC title

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2330/12

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