Claims
- 1. A method for calibrating a visual display, the method comprising:
(a) analyzing a visual display module, the module comprising an array of data points; (b) determining a color value and a brightness value for each data point; (c) adjusting the color value and brightness value for each data point to correspond with a standard color value and a standard brightness value for a given color; and (d) calibrating the visual display module with the adjusted data point values.
- 2. The method of claim 1, further comprising:
(e) setting the visual display module image to the color red; (f) repeating steps (a) to (c); and (g) repeating steps (e) and (f) with the visual display sign image set to green, blue, and white.
- 3. The method of claim 1 wherein the data points are light-emitting diodes.
- 4. The method of claim 1 wherein the process in step (b) for determining the color value and brightness value for each data point includes the use of a colorimeter.
- 5. The method of claim 1 wherein the color value of the data point is the chromaticity of the data point.
- 6. The method of claim 1 wherein the brightness value of the data point is the luminance of the data point.
- 7. The method of claim 1 wherein the process in step (d) for recalibrating the visual display module further comprises uploading the corrected data points to firmware and/or software controlling the visual display module.
- 8. The method of claim 1 wherein steps (a) to (d) take place within a test station.
- 9. The method of claim 1 wherein steps (a) to (d) take place in a darkroom.
- 10. A method for calibrating a visual display, the method comprising:
(a) analyzing a portion of a visual display module, the portion comprising an array of data points; (b) determining a color value and a brightness value for each data point within the array; (c) storing the color value and brightness value for each data point; (d) repeating steps (a) to (c) for each portion of the visual display module until all portions of the visual display module have been analyzed; (e) after all of the data points have been read, calculating correction factors for each data point so that each data point will display the same color; (f) applying the correction factors to each stored data point; and (g) calibrating the visual display module with the corrected data points.
- 11. The method of claim 10, further comprising:
(h) setting the visual display module to project the color red; (i) repeating steps (a) to (f); and (i) repeating steps (h) and (i) with the visual display module set to green, blue, and white.
- 12. The method of claim 10 wherein the data points are light-emitting diodes.
- 13. The method of claim 10 wherein the data points are pixels of a liquid crystal display (LCD).
- 14. The method of claim 10 wherein the color value of the data point is the chromaticity of the data point.
- 15. The method of claim 10 wherein the brightness value of the data point is the luminance of the data point.
- 16. The method of claim 10 wherein the process in step (b) for determining the color value and brightness value for each data point includes the use of a colorimeter.
- 17. The method of claim 10 wherein the process in step (c) for storing the color value and brightness value for each data point comprises storing the data in a database.
- 18. The method of claim 10 wherein the process in step (e) for calculating correction factors for each data point includes processing the data using a computer and software.
- 19. The method of claim 10 wherein the process in step (g) for recalibrating the visual display module further comprises uploading the corrected data points to firmware and/or software controlling the visual display panel.
- 20. The method of claim 10 wherein steps (a) to (g) take place within a test station.
- 21. The method of claim 10 wherein steps (a) to (g) take place in a darkroom.
- 22. An apparatus for analyzing and calibrating a visual display, comprising:
means for capturing an image from a portion of the visual display module; means for determining the color and brightness values for a plurality of data points from the captured image; and means for adjusting the color and brightness values of each data point to correspond with a standard value of color and brightness for a given color.
- 23. The apparatus of claim 22 wherein the means for capturing the image comprises a CCD digital camera and lens.
- 24. The apparatus of claim 22 wherein the means for capturing the image comprises a CMOS digital camera and lens.
- 25. The apparatus of claim 22 wherein the means for determining the color and brightness values for a plurality of data points comprises software loaded in an interface, the interface being operably coupled to both the capturing means and the visual display sign.
- 26. The apparatus of claim 22 wherein the means for adjusting the color and brightness values of each data point comprises calculating a set of correction factors to be applied and uploading the correction factors to the visual display module.
- 27. The apparatus of claim 22 wherein the color value of each data point is the chromaticity of each data point.
- 28. The apparatus of claim 22 wherein the brightness value of each data point is the luminance of each data point.
CROSS REFERENCE TO RELATED APPLICATION(S)
[0001] The present application is a continuation-in-part of U.S. patent application Ser. No. 10/455,146 entitled “METHOD AND APPARATUS FOR ON-SITE CALIBRATION OF VISUAL DISPLAYS” filed Jun. 4, 2003, which is hereby incorporated by reference in its entirety.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10455146 |
Jun 2003 |
US |
Child |
10653559 |
Sep 2003 |
US |