PROJECTOR SYSTEM
First Claim
Patent Images
1. An image projection system comprising:
- a laser light source (111;
121;
131) for providing an illumination beam (112;
122;
132);
a modulation panel (102) for modulating the illumination beam with image information,projection optics (106) for projecting the modulated illumination beam on a screen, andetendue transforming means (104) for broadening said modulated illumination beam, said etendue transforming means being arranged after said modulation panel in the light path from the light source to the screen.
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Abstract
An laser based image projection system for displaying images, which comprises an LCD device and projection optics. By introducing a diffuser between the LCD device and the projection optics, the quality of the projected image is improved. The visibility of material imperfections in the optical the beam path, which were previously visible in the projected image due to the large field-of-depth of the system, is now reduced.
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Citations
14 Claims
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1. An image projection system comprising:
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a laser light source (111;
121;
131) for providing an illumination beam (112;
122;
132);a modulation panel (102) for modulating the illumination beam with image information, projection optics (106) for projecting the modulated illumination beam on a screen, and etendue transforming means (104) for broadening said modulated illumination beam, said etendue transforming means being arranged after said modulation panel in the light path from the light source to the screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of image projection comprising the sequential steps of:
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emitting an illumination beam of laser light; modulating the illumination beam with image information; etendue transforming said modulated illumination beam, such that its beam diameter is broadened; and projecting said etendue transformed illumination beam on a screen. - View Dependent Claims (13, 14)
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Specification