2-DIMENSIONAL IMAGE DISPLAY DEVICE, ILLUMINATION LIGHT SOURCE AND EXPOSURE ILLUMINATION DEVICE
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Abstract
A 2-dimensional beam scan unit reflects emission beams from a red laser light source, a green laser light source and a blue laser light source and scans in a 2-dimensional direction. Diffusion plates diffuse the respective light beams scanned in the 2-dimensional direction to introduce them to corresponding spatial light modulation elements. The respective spatial light modulation elements modulate the respective lights in accordance with video signals of the respective colors. A dichroic prism multiplexes the lights of the three colors after the modulation and introduces the multiplexed lights to a projection lens so that a color image is displayed on a screen. Since the 2-dimensional light emitted from the beam scan unit is diffused to illuminate the spatial light modulation element, it is possible to change the optical axis of the beam emerging from the light diffusion member for irradiating the spatial light modulation element moment by moment, thereby effectively suppressing speckle noise.
8 Citations
45 Claims
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1-37. -37. (canceled)
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38. A 2-dimensional image display device, comprising:
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at least one laser light source; a beam scan unit for converting an emission beam from said laser light source into a 2-dimensional light while scanning the emission beam at least in a 1-dimensional direction; a spatial light modulation element for spatially modulating the light scanned by said beam scan unit; and a light diffusion member disposed between said beam scan unit and said spatial light modulation element for diffusing the 2-dimensional light emerging from said beam scan unit, wherein said beam scan unit includes; a 1-dimensional beam splitting portion for splitting the emission beam from said laser light source to generate a 1-dimensional multibeam array in which a plurality of beams are arrayed in a first direction; and a 1-dimensional scanning portion for scanning the 1-dimensional multibeam array in the second direction normal to the first direction. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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Specification