Compact flat panel color calibration system
View Patent ↗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.
1. A system for calibrating a display, comprising:
a lens operable to receive a narrow, perpendicular, and uniform cone angle of incoming light from a display device;
a housing supporting the lens, the housing including a cushion material surrounding the lens and operable to uniformly distribute contact pressure of the housing out and away from a measuring spot when in contact with the display;
a photodetector operable to detect properties of the incoming light regardless of the location of the lens in relation to the display device;
a microprocessor operable to generate a luminance value of the display device in response to the properties of the incoming light detected by the photodetector, the microprocessor operable to provide the luminance value in order to adjust display parameters for the display device.
2. The system of claim 1 , wherein the lens is operable to pass light in the manner of a total internal reflection 45-degree mirror.
3. The system of claim 1 , further comprising:
a color filter operable to filter light before it passes to the photodetector.
4. The system of claim 3 , wherein the color filter is operable to equalize the incoming light for calibration in a Green spectral region.
5. The system of claim 1 , wherein the photodetector is spectrally non-selective.
6. The system of claim 5 , wherein the photodetector is a linear silicon photodetector.
7. The system of claim 1 , further comprising:
a software application resident on a host computer associated with the display device; the software application operable to accept input from a graphical user interface, the graphical user interface operable to be displayed on the display device.
8. The apparatus of claim 1 , wherein the cushion material is operable to allow measurement of veiling glare caused by ambient light when the housing is not in contact with the display.
9. The apparatus of claim 1 , further comprising:
a filter circuit operable to perform an anti-aliasing function on the properties of the incoming light detected by the photodetector.
10. The apparatus of claim 9 , wherein the filter circuit is operable to stabilize the properties of the incoming light detected by the photodetector and preserve the corresponding wave shape.
11. A compact flat panel color calibration system, comprising:
means for providing a narrow, perpendicular, and uniform cone angle of incoming light;
means for uniformly distributing contact pressure out and away from a measuring spot of a display;
means for detecting the light;
means for determining the color temperature of the light;
means for determining the luminance of the light; and
means for adjusting the display in accordance with the determinations of color temperature and luminance.
12. The system of claim 11 , further comprising:
means for emulating a green channel of the display.
13. The system of claim 11 , further comprising:
means for providing chromatic sensitivity;
means for setting a proper luminance signal range.
14. The system of claim 11 , further comprising:
means for tuning a signal range of the incoming light.
15. The system of claim 11 , wherein the means for detecting the light is placed without regard to any distance requirements from the display.
16. A method of calibrating a display, comprising:
receiving incoming light from a measuring spot of a display at a front face of a lens;
providing uniformly distributed contact pressure on the display out and away from the measuring spot;
passing the incoming light through a side face of the lens;
receiving the incoming light at a photodetector;
generating signals corresponding to the incoming light at the photodetector;
converting the signals into a digital format;
determining a luminance associated with the signals;
transferring the luminance to a software module for processing.
17. The method of claim 16 , further comprising:
filtering the incoming light to emulate a green channel of the display.
18. The method of claim 16 , further comprising:
filtering the signals to remove frequencies above a threshold level.
19. The method of claim 16 , further comprising:
tuning the signal range of the signals.
20. The method of claim 16 , further comprising:
adjusting the color temperature and luminance of the display.