Variable and serrated scanning in laser projectors
AssigneeThomson Licensing
InventorMark Francis Rumreich
Life of this patent
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Abstract
A miniature projector is provided that comprises: a means for providing at least three different light beams of different color; and a means for scanning the light beams; wherein the scanning means is adapted to scan the light beams according to a pattern from a first edge to an ending edge in the screen to form an image, the pattern being a wave pattern of scan lines such that amplitudes oscillates along a first axis as the beams progressively scan along a second axis, the second axis being perpendicular to the first axis, and wherein the wave pattern is a composite of a vertical scan profile and horizontal scan profile and the vertical scan profile has a cyclic wobulation corresponding to the amplitudes.
Claims26
A method comprising:
- receiving image data for an image to scan;
- generating light beams responsive to the image data;
- forming a horizontal scan profile to direct the light beams, the horizontal scan profile comprises cycles having oscillating amplitudes that are substantially parallel to a first axis and substantially perpendicular to a second axis;
- forming a cyclic wobulation responsive to the cycles;
- forming a vertical scan profile that includes the cyclic wobulation;
- and
- scanning the light beams according to a wave pattern that is a composite of the vertical scan profile and the horizontal scan profile to form the image such that the light beams are driven vertically parallel to the second axis from a first edge to an ending edge while oscillating horizontally parallel the first axis;
- wherein variable scan velocity values are employed in the second axis.
A miniature projector comprises:
- a means for providing at least three different light beams of different color;
- and
- a means for scanning the light beams;
- wherein the scanning means is adapted to scan the light beams according to a pattern from a first edge to an ending edge in the screen to form an image, the pattern being a wave pattern of scan lines such that amplitudes oscillates along a first axis as the beams progressively scan along a second axis, the second axis being perpendicular to the first axis,
- wherein the scanning means is further adapted to employ variable scan velocity values in the second axis, and
- wherein the wave pattern is a composite of a vertical scan profile and horizontal scan profile and the vertical scan profile has a cyclic wobulation corresponding to the amplitudes.
A projector comprises:
- a source of at least three different light beams of different color;
- and
- a raster scanner to scan the light beams to a viewing surface;
- wherein the light beams are steered in a pattern from a first edge to an ending edge in the screen to form an image, the pattern being a wave pattern of scan lines such that amplitudes oscillates along a first axis as the beams progressively scan along a second axis, the second axis being perpendicular to the first axis,
- wherein the raster scanner is further adapted to employ variable scan velocity values in the second axis, and
- wherein the wave pattern is a composite of a vertical scan profile and horizontal scan profile and the vertical scan profile has a cyclic wobulation corresponding to the amplitudes.
Dependencies are inferred from the claim text.