Projector
AssigneeSeiko Epson Corporation
InventorSusumu Aruga
Life of this patent
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Abstract
A projector includes: a light source that emits light having an asymmetric illuminance distribution; a light modulation device that modulates the light emitted from the light source; and an optical member disposed in an optical path between the light source and the light modulation device, the optical member changing the illuminance distribution of the light from the light source, wherein the optical member changes the illuminance distribution of the light passing therethrough in such a way that a highest illuminance area in the illuminance distribution of the light after passing through the optical member is shifted toward the center of the optical member as compared with the position of the highest illuminance area in the illuminance distribution of the light before incident on the optical member.
Claims17
A projector comprising:
- a light source that emits light having an asymmetric illuminance distribution;
- a light modulation device that modulates the light emitted from the light source;
- and
- relay lenses that are disposed in an optical path between the light source and the light modulation device, the relay lenses changing the illuminance distribution of the light from the light source, wherein the relay lenses are configured in such a way that the relay lenses change the illuminance distribution of the light passing therethrough so that a highest illuminance area in the illuminance distribution of the light after passing through the relay lenses is shifted toward the center of the relay lenses as compared with the position of the highest illuminance area in the illuminance distribution of the light before incident on the relay lenses.
A projector comprising:
- a light source that emits light having an asymmetric illuminance distribution;
- a light modulation device that modulates the light emitted from the light source;
- an optical member disposed in an optical path between the light source and the light modulation device, the optical member changing the illuminance distribution of the light from the light source, wherein the optical member is configured to change the illuminance distribution of the light passing therethrough in such a way that a highest illuminance area in the illuminance distribution of the light after passing through the optical member is shifted toward the center of the optical member as compared with the position of the highest illuminance area in the illuminance distribution of the light before incident on the optical member;
- and
- a color separation optical system that separates the light emitted from the light source into a plurality of color light fluxes;
- a light combining optical system that combines the plurality of color light fluxes having exited from the light modulation device, which is formed of a plurality of light modulation devices;
- and a relay optical system that reverses only a specific one of the plurality of color light fluxes and directs the reversed color light flux toward the light combining optical system, wherein the optical member is disposed in an optical path along which the specific color light flux propagates.
Dependencies are inferred from the claim text.