System and method for measuring display quality with a hyperspectral imager

• US 8,035,812 B2
• Filed: 03/24/2009
• Issued: 10/11/2011
• Est. Priority Date: 03/24/2009
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Shah, Hemang J
• Primary Examiner(s): Evans; Fannie L.
• Application Number:
  US12/410,409
• Publication Number:
  US 20100245833A1
• Time in Patent Office: 931 Days
• Field of Search: None
• US Class Current: 356/300
• CPC Class Codes: G01J 2003/1282 Spectrum tailoring
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0264 Electrical interface; User interface
• CPC Class Codes: G01J 3/2823 Imaging spectrometer
• CPC Class Codes: G01J 3/50 using electric radiation detectors
• CPC Class Codes: G01J 3/506 measuring the colour produced by screens, monitors, displays or CRTs

Abstract

A system and method for measuring display quality by using a hyperspectral imager are disclosed. In one embodiment, the system comprises a hyperspectral imager configured to determine an intensity of light for a plurality of locations in a first area on a display for a plurality of spectral channels, and a processor configured to determine a measure of display quality based on the determined intensities.

Claims

1. A method of measuring the quality of a display, the method comprising:

determining an intensity of light with a hyperspectral imager for a plurality of locations in a first area of a display for a plurality of spectral channels; and

determining a measure of display quality based on the determined intensities.

2. The method of claim 1, wherein the light is reflected by, transmitted through, or emitted by the display.

3. The method of claim 1, wherein determining the intensity comprises determining the intensity for four or more spectral channels.

4. The method of claim 3, wherein determining the intensity comprises determining the intensity for five or more spectral channels.

5. The method of claim 4, wherein determining the intensity comprises determining the intensity for at least one hundred spectral channels.

6. The method of claim 5, wherein determining the intensity comprises determining the intensity for about four-hundred and eighty spectral channels.

7. The method of claim 1, wherein the spectral channels span at least the visible spectrum.

8. The method of claim 1, wherein the spectral channels include at least one non-visible component.

9. The method of claim 1, further comprising, subsequent to determining an intensity of light for a plurality of locations in a first area, determining an intensity of light with the hyperspectral imager for a plurality of locations in a second area of the display for the plurality of spectral channels.

10. The method of claim 9, further comprising determining the intensity of light for at least ten areas of the display.

11. The method of claim 9, further comprising, subsequent to determining an intensity of light for a plurality of locations in a first area and prior to determining an intensity of light for a plurality of locations in a second area, moving the display with respect to the hyperspectral imager.

12. The method of claim 1, wherein the plurality of locations in the first area are collinear.

13. The method of claim 12, further comprising determining an intensity of light with the hyperspectral imager for a plurality of collinear locations in a second area, wherein a first line defined by the plurality of collinear locations in the first area is parallel to a second line defined by the plurality of collinear locations in the second area.

14. The method of claim 1, wherein the determining a measure of display quality comprises determining a measure of display quality according to Video Electronics Standards Association (VESA) standards.

15. The method of claim 1, wherein the measure of display quality is based on a multi-point measurement.

16. The method of claim 15, wherein the multi-point measurement comprises a five-point measurement or a nine-point measurement.

17. A system for measuring the quality of a display, the system comprising:

a hyperspectral imager configured to determine an intensity of light for a plurality of locations in a first area on a display for a plurality of spectral channels; and

a processor configured to determine a measure of display quality based on the determined intensities.

18. The system of claim 17, further comprising a stage configured to move the display relative to the hyperspectral imager.

19. The system of claim 18, wherein the stage is configured to move the display relative to the hyperspectral imager in at least two directions.

20. The system of claim 18, wherein the stage is configured to heat or cool the display.

21. The system of claim 17, further comprising a light source configured to uniformly illuminate at least a portion of the display.

22. The system of claim 21, wherein the illuminated portion is a line.

23. The system of claim 21, wherein light is generated by the light source and reflected by the display.

24. The system of claim 17, further comprising a data storage configured to store at least one of the determined intensities of light or the determined measure of display quality.

25. The system of claim 17, further comprising an output configured to output the measure of display quality.

26. The system of claim 17, further comprising an alert configured to indicate when a display does not conform to a pre-determined specification.

27. A method of generating a hyperspectral datacube, the method comprising:

determining an intensity of light with a hyperspectral imager for a plurality of locations in a two-dimensional area of a display for a plurality of spectral channels; and

storing the determined intensities in a datacube on a computer-readable storage, the datacube being indexed by at least a first parameter corresponding to a first direction, a second parameter corresponding to a second direction, and a third parameter corresponding to wavelength.