Display illumination response time compensation system and method

• US 8,466,859 B1
• Filed: 12/06/2005
• Issued: 06/18/2013
• Est. Priority Date: 12/06/2005
• Status: Active Grant

• Current Assignee: NVIDIA Corporation
• Original Assignee: NVIDIA Corporation
• Inventors: Herz, William Samuel
• Primary Examiner(s): PHAM, VIET DAVID
• Application Number:
  US11/295,941
• Time in Patent Office: 2,751 Days
• Field of Search: 345/87, 345/204, 345/418, 345/102
• US Class Current: 345/87
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 3/006 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 Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A digital video display response time compensation system and method are presented. A digital video display response time compensation system and method are utilized to direct adjustments in a display presentation. A test pattern response time compensation value determination process for establishing appropriate adjustment levels for a display is performed. A test pattern is displayed; user input on compensation to the test pattern display is received; pixel value calibration settings are determined based upon the user input; and the test pattern display appearance is altered based upon the pixel value calibration settings. After the appropriate pixel illumination adjustment values are establish a pixel value is received. The pixel value is adjusted in accordance with the response time compensation value and a response time compensated pixel value is output.

Claims

1. A display response time compensation method comprising:

performing in an electronic system a test pattern response time compensation value determination process, wherein said performing comprises receiving input about a test pattern display via a graphical user interface that comprises an adjustment indicator;

receiving a pixel value;

adjusting said pixel value in said electronic system in accordance with said response time compensation value, wherein an adjustment is linear in a first zone of interest and non-linear in a second zone of interest, wherein said first zone of interest and said second zone of interest can be distinguished based upon the rate at which pixel values are changing associated with a rate at which an image is moving; and

outputting a response time compensated pixel value.

2. The display response time compensation method of claim 1 wherein said adjusting includes a piecewise increasing pre-emphasis change in which one of said first zone of interest and said second zone of interest is adjusted non-linearly.

3. The display response time compensation method of claim 1 wherein said adjusting includes a piecewise decreasing de-emphasis change in which one of said first zone of interest and said second zone of interest is adjusted non-linearly.

4. The display response time compensation method of claim 1 wherein said adjusting includes reference to a subsequent frame'"'"'s pixel values.

5. The display response time compensation method of claim 1 further comprising:

determining in said electronic system if said received pixel value is associated with a pixel that is changing values between frames; and

ceasing adjustments in said pixel value if said pixel value is associated with a static image pixel.

6. The display response time compensation method of claim 1 further comprising detecting in said electronic system a static image frame associated with a paused mode.

7. The display response time compensation method of claim 6 further comprising ceasing adjustments in said pixel value if said pixel value is associated with said paused mode.

8. A display time response compensation system comprising:

a bus for communicating information;

a processor for performing display response compensation instructions, said processor communicatively coupled to said bus; and

a memory for storing said display response compensation instructions, said memory communicatively coupled to said bus, wherein said display response compensation instructions include;

establishing response time compensation values based upon user subjective test results, wherein said establishing comprises receiving input about a test pattern display a graphical user interface that comprises an adjustment indicator, wherein said response time compensation values are linear in a first zone of interest and non-linear in a second zone of interest, wherein said first zone of interest and said second zone of interest can be distinguished based upon the rate at which pixel values are changing associated with a rate at which an image is moving; and

calibrating pixel values in accordance with said response time compensation values.

9. The display time response compensation system of claim 8 wherein said calibrating includes geometrical analysis of a moving object vector trajectory.

10. The display time response compensation system of claim 8 wherein said instructions include a movement threshold analysis.

11. The display time response compensation system of claim 8 wherein said processor utilizes non-linearly introduced amplitude modification based upon historical pixel data to achieve calibration of said pixel values.

12. The display time response compensation system of claim 8 wherein said instructions include resetting historical data and turning off compensation if no image motion is detected.

13. The display time response compensation system of claim 8 further comprising a dual head component for presenting a correct rendering of a test pattern while permitting matching with a display rendered version.

14. The display time response compensation system of claim 8 wherein said processor is a graphics processing unit including pixel shaders.

15. The display time response compensation system of claim 8 wherein said processor is a graphics processing unit including a dedicated video processor.

16. The display time response compensation system of claim 8 wherein said processor is a programmable function processing engine.

17. A test pattern response time compensation value determination process comprising:

displaying a test pattern;

receiving user input via a graphical user interface on compensation to said test pattern display, wherein said graphical user interface comprises an adjustment indicator to adjust said compensation, wherein an adjustment is linear in a first zone of interest and non-linear in a second zone of interest, wherein said first zone of interest and said second zone of interest can be distinguished based upon the rate at which pixel values are changing associated with a rate at which an image is moving;

determining in an electronic system pixel value calibration settings based upon said user input; and

altering said test pattern display appearance in said electronic system based upon said pixel value calibration settings.

18. The test pattern response time compensation value determination process of claim 17 wherein said pixel value calibration settings are stored.

19. The test pattern response time compensation value determination process of claim 17 wherein said pixel value calibration settings corresponding to subjective user input are stored in a lookup table.

20. The test pattern response time compensation value determination process of claim 19 wherein pixel changing conditions are fed into said lookup table as index values that correspond to user input value adjustments which are utilized to provide pixel compensation.

21. The test pattern response time compensation value determination process of claim 17 wherein said graphical user interface is a user control panel for receiving user input on test pattern display.

22. The test pattern response time compensation value determination process of claim 17 wherein a determination is made of the amount of adjustment appropriate to reach a desired illumination level.

23. The test pattern response time compensation value termination process of claim 17 wherein said test pattern includes changing pixel values.

24. The test pattern response time compensation value determination process of claim 17 wherein test patterns are presented in which the velocity of the image can change or remain constant.