Display system timing control method
AssigneeTexas Instruments Incorporated
InventorsDonald B. Doherty, Daniel J. Morgan
Life of this patent
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Abstract
A display system includes a light source 110 and a spatial light modulator 122 located to receive light from the light source. The spatial light modulator (e.g., a DMD) includes a number of independently controllable elements that are activated for a period of time to display light of a desired brightness. A light sensor 136 is located to determine a characteristic of light from the light source 110. A control circuit 126 is coupled to the spatial light modulator 122 and controls the period of time that the independently controllable elements are activated. This period of time is based at least in part by an input received from the light sensor 136.
Claims20
A method of controlling the timing of a spatial light modulator, the method comprising:
- receiving a video timing signal;
- generating a spatial light modulator timing signal based upon the video timing signal;
- determining the timing of a color wheel;
- comparing the timing of the color wheel with the timing of the spatial light modulator timing signal;
- receiving a light intensity measurement signal;
- and
- based upon the light intensity measurement signal and the result of the comparing, adjusting the spatial light modulator timing signal.
A method of controlling the timing of a spatial light modulator, the method comprising:
- receiving a video timing signal;
- generating a spatial light modulator timing signal based upon the video timing signal;
- determining the timing of a color wheel;
- comparing the timing of the color wheel with the timing of the spatial light modulator timing signal;
- and
- based upon the result of the comparing, adjusting the spatial light modulator timing signal, wherein the adjusting of the spatial light modulator timing signal comprises determining a desired rate and multiplying the desired rate by a constant.
A method of controlling the timing of a spatial light modulator, the method comprising:
- receiving a video timing signal;
- generating a spatial light modulator timing signal based upon the video timing signal;
- determining the timing of a color wheel;
- comparing the timing of the color wheel with the timing of the spatial light modulator timing signal;
- and
- based upon the result of the comparing, adjusting the spatial light modulator timing signal by changing a clock signal such that a clock cycle is periodically ignored.
A method of controlling the timing of a spatial light modulator, the method comprising:
- receiving a video timing signal;
- generating a spatial light modulator timing signal based upon the video timing signal;
- determining the timing of a color wheel;
- comparing the timing of the color wheel with the timing of the spatial light modulator timing signal;
- and
- based upon the result of the comparing, adjusting the spatial light modulator timing signal by changing a clock signal such that an integer number of clock cycles are periodically ignored.
Dependencies are inferred from the claim text.