Projection display device

Details Projection display device Projection display device

2005-09-20

2005-09-20

Gray, David (Department: 2851)

Optics: image projectors

Composite projected image

C353S031000, C353S034000, C353S037000, C353S099000, C353S122000, C348S201000, C348S202000, C348S203000, C359S201100

Reexamination Certificate

active

06945652

ABSTRACT:
Light beams having different wavelengths emitted from red and blue semiconductor lasers and a laser diode pumped green solid-state laser are incident on respectively different surfaces of a color combining element and are overlaid on a single light path. Multiple beam interference films of the color combining element allow only the light beams having the oscillating wavelengths corresponding to the respective light sources to pass therethrough or reflect thereon so as to combine the light beams. A collimator collimates the light beams so that the beam waist of the light beams lies around a projection plane. When two-dimensional scanning is performed by radiating the light beams onto a micromechanical mirror and then onto a galvanometer mirror for scanning light in the horizontal and vertical directions, respectively, a color image is displayed on the projection plane by arranging pixels in array, each pixel consisting of overlapping pulses of light of three colors.

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Electronics and Communications in Japan, vol. 68, No. 4, pp. 387-394 (English translations only, pp. 1-22).
Electronics and Communications in Japan, vol. 68, No. 4, pp. 387-394 (only in Japanes language).

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