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US 9,316,826 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.
Claims11
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 elements in the array in bright or dark states such that the fraction of the number of elements in each column that are in the bright state represents the relative brightness of a column in a desired grayscale image;
- and,
- imaging the array with a cylindrical lens that focuses light along an axis perpendicular to the columns of the array.
1 more element
Dependencies are inferred from the claim text.