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US 8,134,770 B2Granted
Reducing speckle pattern in display images
AssigneeSpatial Photonics, Inc.
InventorsVlad Novotny, Gabriel Matus, Michel Combes
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Abstract
A display system includes a coherent light source that can emit a coherent light beam, a de-speckling device configured to distort a wavefront of the coherent light beam to produce a distorted coherent light beam, and a two-dimensional array of light modulators that can selectively modulate the distorted coherent light beam to select a plurality of pixels for display.
Claims15
A display system comprising:
- a coherent light source configured to emit a coherent light beam having a path and a wavefront;
- a de-speckling device positioned in the path of the coherent light beam between the coherent light source and a two-dimensional array of light modulators, the de-speckling device configured to distort the wavefront of the coherent light beam to produce a distorted coherent light beam;
- and
- a two-dimensional array of light modulators configured to selectively modulate the distorted coherent light beam to form a display image comprising a plurality of pixels,
- wherein the de-speckling device includes:
- an optical medium;
- and
- an actuator configured to produce an acoustic wave in the optical medium that generates a translational, rotational or tilting motion of the wavefront of the coherent light beam.
5 more elements
Dependencies are inferred from the claim text.