Power calibration of multiple light sources in a display screen
US9053659B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Dec 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device with multiple light sources includes a detector that dynamically measures output intensities of the light sources as the light sources are producing light to cause an image to be formed on a display screen. A controller for the display device compares the measured output intensities with desired output intensities determined from factory-calibrated correlation values and adjusts the inputs to the light sources to compensate for drift and other similar effects, so that brightness uniformity among the multiple light sources can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.