PROJECTION DISPLAY APPARATUS HAVING PLURAL LIGHT SOURCES
First Claim
1. A projection display apparatus comprising:
- a plurality of light sources;
a plurality of light source power supplies configured to supply electric power to the plurality of light sources; and
a lighting controller configured to control the plurality of light source power supplies so as to select and light at least one light source of the plurality of light sources in accordance with each lighting history of the plurality of light sources,wherein the lighting controller lights a predetermined light source continuously after the lighting history of one of the plurality of light sources reaches a predetermined value, andwherein the lighting controller lights a light source other than the predetermined light source after the lighting history of the predetermined light source reaches a predetermined lifetime value.
1 Assignment
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Accused Products
Abstract
A projection display apparatus 100, 200 includes a plurality of light sources 3a, 3b, a plurality of light source power supplies 2a, 2b configured to supply electric power to the plurality of light sources, and a lighting controller 6 configured to control the plurality of light source power supplies so as to select and light at least one light source of the plurality of light sources in accordance with each lighting history of the plurality of light sources. The lighting controller 6 lights a predetermined light source continuously after the lighting history of one of the plurality of light sources reaches a predetermined value, and the lighting controller 6 lights a light source other than the predetermined light source after the lighting history of the predetermined light source reaches a predetermined lifetime value.
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Citations
4 Claims
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1. A projection display apparatus comprising:
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a plurality of light sources; a plurality of light source power supplies configured to supply electric power to the plurality of light sources; and a lighting controller configured to control the plurality of light source power supplies so as to select and light at least one light source of the plurality of light sources in accordance with each lighting history of the plurality of light sources, wherein the lighting controller lights a predetermined light source continuously after the lighting history of one of the plurality of light sources reaches a predetermined value, and wherein the lighting controller lights a light source other than the predetermined light source after the lighting history of the predetermined light source reaches a predetermined lifetime value. - View Dependent Claims (2, 3, 4)
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Specification