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US 9,175,957 B2Granted
Grayscale patterns from binary spatial light modulators
AssigneeAlces Technology, Inc.
InventorsDavid M Bloom, Matthew A Leone
Life of this patent
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Abstract
Brightness-by-column grayscale and spatial Σ-Δ modulation grayscale allow grayscale patterns to be produced using a binary spatial light modulator as fast as the bright/dark switching speed.
Claims6
A method for producing a grayscale image comprising:
- providing a digital spatial light modulator having a two-dimensional array of modulator elements each of which may be set in a bright state or a dark state, the elements arranged in columns;
- setting columns of elements in the array in bright or dark states according to spatial Σ-Δ modulation of a desired grayscale pattern;
- and,
- imaging the array with a lens and an aperture to produce the desired pattern, the aperture removing high spatial-frequency components from the pattern.
1 more element
Dependencies are inferred from the claim text.