Patent ID: 7510284

Claim:
A projection-type display device comprising: a set of lasers for producing a desired amount of light, each laser in the set of lasers configured to produce light in a wavelength range related to a primary color and including a temperature sensor configured to detect temperature of a portion of the laser, wherein the total number of lasers in the set of lasers is greater than a number of lasers needed to produce the desired amount of light; control circuitry configured to determine a subset of lasers in the set of lasers that produces the desired amount of light, wherein the control circuitry is configured to turn off a heating laser in the set of lasers when the heating laser reaches a threshold temperature; an optical modulation device configured to selectively transmit light produced by the subset of lasers according to video data included in a video signal provided to the optical modulation device; an optics system, arranged to receive light produced by the subset of lasers before receipt by the optical modulation device, and configured to increase flux area of the light; and a projection lens system configured to project light transmitted by the optical modulation device along a projection path.