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US 9,071,771 B1Granted
Raster reordering in laser projection systems
AssigneeRawles LLC
InventorMenashe Haskin
Life of this patent
Estimating the term…
Abstract
Techniques are described for reducing safety-relevant emission of a laser projection system. A multi-facet optical element is positioned in the path of a raster-scanning laser beam. Each facet of the optical element is angled to redirect a projected pixel to a different pixel position. Collectively, the facets are configured to convert the projected raster scan into a non-raster scan in which physically proximate pixels are illuminated temporally non-proximate times.
Claims23
An optical projection system comprising:
- an image source configured to generate a source image, the source image comprising a plurality of pixels in a first order for projection onto a display surface at associated pixel positions;
- a processing component configured to reorder the pixels of the source image in a second order to produce a reordered image;
- a projection source configured to direct a laser beam that projects the reordered pixels of the reordered image in a raster sequence;
- and
- an optical element positioned in a path of the laser beam, the optical element having multiple facets, wherein each of the facets is configured to redirect light of a particular projected pixel of the reordered image to its associated pixel position on the display surface such that the plurality of pixels of a resulting image on the display surface is ordered in the first order.
2 more elements
A method comprising:
- generating, by an image source, a source image, the source image comprising a plurality of pixels in a first order for projection onto a display surface at associated pixel positions;
- reordering, by a processing component, the pixels of the source image in a second order to produce a reordered image;
- directing, by a projection source, a laser beam that projects the reordered pixels of the reordered image in a raster sequence;
- and
- redirecting, by each facet of multiple facets of an optical element positioned in a path of the laser beam, light of a particular projected pixel of the reordered image to its associated pixel position on the display surface such that the plurality of pixels of a resulting image on the display surface is ordered in the first order.
2 more elements
An optical projection system comprising:
- one or more processors;
- a memory;
- instructions stored in the memory that, when executed by the one or more processors, cause the one or more processors to:
- generate a source image, the source image comprising a plurality of pixels in a first order for projection onto a display surface at associated pixel positions;
- reorder the pixels of the source image in a second order to produce a reordered image;
- direct a laser beam that projects the reordered pixels of the reordered image in a raster sequence;
- and
- an optical element positioned in a path of the laser beam, the optical element having multiple facets, wherein each of the facets is configured to redirect light of a particular projected pixel of the reordered image to its associated pixel position on the display surface such that the plurality of pixels of a resulting image on the display surface is ordered in the first order.
5 more elements
Dependencies are inferred from the claim text.