Illumination device and projection display device
AssigneeSanyo Electric Co., Ltd.
InventorsShinya Matsumoto, Takashi Ikeda
Life of this patent
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Abstract
An illumination device comprises: a plurality of laser light sources arranged so as to be identical in a direction of light emission; an optical element for converting laser light emitted from the laser light sources into parallel light at least in one direction; and a fly-eye lens into which the laser light converted into parallel light is entered. Placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
Claims6
An illumination device comprising:
- a plurality of laser light sources arranged so as to be identical in a direction of light emission;
- an optical element for converting laser light having predetermined divergent angles emitted from the laser light sources into parallel light at least in one direction by providing a convergence action to the emitted laser light;
- and
- a fly-eye lens into which the laser light converted into parallel light is entered, wherein
- placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
A projection display device comprising:
- an illumination device for applying light to a region to be illuminated;
- and
- an imager disposed in the region to be illuminated, wherein the illumination device comprises:
- a plurality of laser light sources arranged so as to be identical in a direction of light emission;
- an optical element for converting laser light having predetermined divergent angles emitted from the laser light sources into parallel light at least in one direction by providing a convergence action to the emitted laser light;
- and
- a fly-eye lens into which the laser light converted into parallel light is entered, and wherein
- placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
Dependencies are inferred from the claim text.