Projection-type display devices including redundant laser sets
First Claim
1. 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.
3 Assignments
0 Petitions
Accused Products
Abstract
Described herein are display devices that provide projection-type video output and use redundant sets of lasers to generate light. The laser set produces a desired amount of light, e.g., for a primary color. A redundant laser set includes more lasers than that needed to produce the desired amount of light. For example, a set of six lasers may only need five lasers to generate and emit a desired amount of light. The sixth laser allows failure of one laser in the set to not compromise operability of the entire set—and the display device. In addition, extra lasers in a laser set also allows the lasers to be cycled for heat purposes and to extend longevity of individual lasers in the set.
113 Citations
16 Claims
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1. A projection-type display device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A projection-type display device comprising:
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a set of diode lasers for producing a desired amount of light, each diode laser in the set of diode 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 diode lasers in the set of diode lasers is greater than a number of diode lasers needed to produce the desired amount of light; control circuitry configured to determine a subset of diode lasers in the set of diode lasers that produces light for an image, 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 diode 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 diode 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. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification