Laser illuminated projection displays

Details Laser illuminated projection displays Laser illuminated projection displays

2008-04-08

2008-04-08

Natnael, Paulos M. (Department: 2622)

Television

Video display

Projection device

C372S102000, C353S057000

Reexamination Certificate

active

07355657

ABSTRACT:
A projection video display includes a light source including an OPS-laser delivering laser radiation in multiple transverse modes (a multiple-transverse-mode OPS-laser). The display includes a spatial light modulator for spatially modulating the radiation from the multiple-transverse-mode OPS-laser in accordance with a portion of an image to be displayed. Projection optics project the spatially modulated light on a screen on which the image is to be displayed. In one example the OPS-laser is a diode-laser array pumped OPS-laser and is one of three lasers, one delivering red light, one delivering blue light, and the other delivering green light. The lasers are time modulated such that the spatial light modulator receives light from each of the lasers separately. The OPS laser is directly time modulated by periodically turning the diode-laser array on and off.

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