Compact flat panel color calibration system

• US 8,471,841 B2
• Filed: 05/11/2012
• Issued: 06/25/2013
• Est. Priority Date: 12/08/2000
• Status: Expired due to Fees

• Current Assignee: RPX Corporation
• Original Assignee: RPX Corporation
• Inventors: Evanicky, Daniel, Granger, Ed, Ingulsrud, Joel, Meng, Alice T.
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US13/469,909
• Publication Number:
  US 20120218320A1
• Time in Patent Office: 410 Days
• Field of Search: 345 76- 98, 345204-215, 345690-699
• US Class Current: 345/212
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• 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 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 5/005 Adapting incoming signals to the display format of the display terminal
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 17/02 for colour television signals
• CPC Class Codes: H04N 17/04 for receivers
• CPC Class Codes: H04N 9/30 using solid-state colour display devices

Abstract

A compact flat panel color calibration system includes a lens prism optic able to pass a narrow, perpendicular, and uniform cone angle of incoming light to a spectrally non-selective photodetector. The calibration system also includes a microprocessor operable to determine the luminance of the display based upon the information gathered by the photodetector. A software module included in the calibration system is then operable to process the luminance information in order to adjust the flat panel display.

Claims

1. A system for calibrating a display, comprising:

a sensor system for measuring color correction information of a plurality of screens of a visual digital media;

a calibration logic module for receiving the color correction information associated with each screen of the visual digital media; and

wherein the calibration logic module further applies control information to a backlit driver for dynamic control and adjustment of a display providing the plurality of screens of the visual digital media in response to the color correction information of the plurality of screens of the visual digital media.

2. The system of claim 1, wherein the color correction information is stored in a storage medium apart from the visual digital media.

3. The system of claim 1, wherein the color correction information is encoded in the visual digital media.

4. The system of claim 1, wherein each image frame of the visual digital media has color correction information associated therewith.

5. The system of claim 4, wherein the calibration logic module

synchronizes application of the color correction information to corresponding image frames of the visual digital media.

6. The system of claim 1, wherein the color correction information includes any of color temperature, brightness, gamma, white balance, and luminance.

7. The system of claim 1, wherein the calibration logic module maintains a luminance level of the display by lowering backlight brightness and decreasing gamma.

8. The system of claim 1, wherein the calibration logic module examines a gray scale content of one or more image frames of the visual digital media and computes an arithmetic mean of a dynamic brightness level of the display.

9. The system of claim 8, wherein the calibration logic module sets a brightness level for the display from the arithmetic mean by controlling two lamp sources in tandem driving the display.

10. A method for calibrating a display, comprising:

instructing a sensor system to measure color correction information of a plurality of screens of a visual digital media;

receiving the color correction information associated with each screen of the visual digital media; and

applying control information to a backlit driver for dynamic control and adjustment of a display providing the plurality of screens of the visual digital media in response to the color correction information of the plurality of screens of the visual digital media.

11. The method of claim 10, wherein the color correction information is stored in a storage medium apart from the visual digital media.

12. The method of claim 10, wherein the color correction information is encoded in the visual digital media.

13. The method of claim 10, wherein each image frame of the visual digital media has color correction information associated therewith.

14. The method of claim 13, further comprising:

synchronizing application of the color correction information to corresponding image frames of the visual digital media.

15. The method of claim 10, wherein the color correction information includes any of color temperature, brightness, gamma, white balance, and luminance.

16. The method of claim 10, wherein applying the color correction information includes maintaining a luminance level of the display by lowering backlight brightness and decreasing gamma.

17. The method of claim 10, further comprising:

examining a gray scale content of one or more image frames of the visual digital media;

computing an arithmetic mean of a dynamic brightness level of the display.

18. The method of claim 17, further comprising:

setting a brightness level for the display from the arithmetic mean by controlling two lamp sources in tandem driving the display.