Power Calibration of Multiple Light Sources in a Display Screen
AssigneePrysm, Inc.
InventorsChris BUTLER, Anand Budni
Life of this patent
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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.
Claims20
A light-based display device, comprising:
- a display screen;
- light sources for producing light that is conveyed to the display screen;
- and
- a controller for modulating an input current to each of the light sources in accordance with desired output intensities as determined from correlation values and measured output intensities of the light produced by the light sources.
A method of controlling output intensities of laser beams that are conveyed to a display screen to form an image on the display screen, comprising:
- determining inputs to light sources from display values and desired output intensities from the inputs and correlation values;
- measuring output intensities derived from the light generated by the light sources using the inputs;
- and
- adjusting the inputs based on the desired output intensities and the measured output intensities.
A computer-readable storage medium comprising instructions to be executed by a processing unit of a display device to carry out the steps of:
- determining inputs to light sources of the display device from display values and desired output intensities from the inputs and correlation values;
- receiving measured output intensities derived from the light generated by the light sources using the corrected inputs;
- and
- adjusting the inputs based on the desired output intensities and the measured output intensities.
Dependencies are inferred from the claim text.