Rear-projecting device
AssigneeDicon A/S
InventorsHenrik Glent-Madsen, Soren Christoph Meyer, Kim Niels Raahauge
Life of this patent
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Abstract
The invention relates to a rear-projecting device comprising: light guides (13) for distribution of light from at least one light source (30) to a light projecting area (10; 62) via at least one, preferably two spatial light modulating arrangements (41; 26), said light modulating arrangements (41; 26) being arranged in relation to a light-projecting area (10; 52) in such a manner that each of said arrangements (41; 26) illuminates a sub-area (10A; 38; 51; 61) of the said light-projecting area (10; 52), said light projection area (10; 52) being wholly or partly transparent. According to the invention, a compact and light efficient system has been obtained.
Claims17
A rear projecting device comprising
- light guides (13) for distribution of light from at least one light source (30) to a light-projecting area (41;26) via at least two spatial light modulator arrangements (41;26),
- said light modulating arrangements (41;26) being arranged in relation to a light-projecting area (10;
- 52) in such a manner that each of the said arrangements (41;26) illuminates a sub-area (10A;
- 38;
- 51;
- 61) of the said light-projecting area (10;
- 52),
- said light projection area (10;
- 52) being wholly or partly transparent.
A rear projecting device comprising
- light guides (13) for distribution of light from at least one light source (30) to a light-projecting area (10;
- 62) via at least one spatial light modulator arrangements (41;26),
- said light modulating arrangements (41;26) being arranged in relation to a light-projecting area (10;
- 52) in such a manner at least one of the said arrangements (41;26) illuminates an area (10A;
- 38;
- 51;
- 61) of the said light-projecting area (10;
- 52),
- said light projection area (10;
- 52) being wholly or partly transparent.
Rear-projecting device comprising
- a plurality of light emitters arranged for illumination of a light-projecting area comprising a front side and a rear side via at least two spatial light modulating arrangements,
- said light modulating arrangements being arranged in relation to a light-projecting area in such a manner that each of said arrangements illuminates a sub-area of the said light-projecting area,
- said light projection area being wholly or partly transparent.
Rear projecting arrangement having at least one light input, at least one spatial light modulator arrangement and a light projecting area (38), said spatial light modulator arrangement comprising at least one spatial light modulator (41;26), said spatial light modulators (41;26) comprising a plurality of electrically controllable shutters (23) controlling the projecting of light to an effective light projecting area (25A),
- said spatial light modulating arrangement having a modulator dimension (D) in a given direction of the arrangement, said effective light projecting area (25A) having a projecting dimension (d) of the projected light in a corresponding direction,
- said modulator dimension (D) being the maximum distance between two shutters (23) of the modulator arrangement in the said direction,
- where D>d/20 (D is greater than d/20), preferably greater than d/4 (D is greater than d/4).
Dependencies are inferred from the claim text.