Calibration system and method for light modulation device
AssigneeEvans & Sutherland Computer Corporation
InventorsMichael Wayne Bass, Dennis F. Elkins, Bret D. Winkler
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Abstract
A calibration method for a grating light modulator includes calibrating light reflective ribbons on the modulator on a pixel-by-pixel basis. The method further includes performing a dark-state calibration and a bright-state calibration for each pixel. Once completed, the results of the dark-state calibration and the bright-state calibration may be combined to ensure a smooth transition between a dark state and a bright state for each pixel.
Claims34
A method of calibrating a plurality of pixels of a light modulation device, each of said pixels comprising a first elongated element and a second elongated element, comprising:
- applying a voltage to the first elongated elements of each of the plurality of pixels such that they are deflected to a common biased position;
- and
- determining a light intensity response for each of the plurality of pixels, pixel-by-pixel, using a photodetector while said first elongated elements are held at the common biased position using a processing device.
A system for calibrating a plurality of pixels of a light modulation device, each of said pixels comprising a first elongated element and a second elongated element, said system comprising:
- at least one light source;
- a photodetector for measuring a light intensity output of each of the plurality of pixels;
- a control device for positioning said first elongated elements to a common biased position;
- said control device further operable to toggle the second elongated elements of the plurality of pixels, one-by-one, while the first elongated elements are positioned at the common biased position;
- and
- a processing device for determining a light intensity response for each the plurality of pixels on a pixel-by-pixel basis.
A system for calibrating a plurality of pixels of a light modulation device, each of said pixels comprising a first elongated element and a second elongated element, said system comprising:
- means for deflecting a first group of elongated elements to a common biased position;
- and
- means for determining a light intensity response for the plurality of pixels on a pixel-by-pixel basis while said first elongated elements are held at the common biased position using a processing device.
A non-transitory computer readable medium for storing computer instructions that, when executed on a computer, enable a processor-based system to:
- deflect a first group of elongated elements on a light modulation device to a common biased position;
- and
- determine a light intensity response for the plurality of pixels on a pixel-by-pixel basis while the first elongated elements are held at the common biased position.
Dependencies are inferred from the claim text.