Projector
AssigneeSeiko Epson Corporation
InventorsMika Koyama, Yasuyuki Kobayashi, Nobuyuki Otsuki, Kiyomasa Shirakura
Life of this patent
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Abstract
A projector includes: an external case provided with an opening through which light passes; a projection system disposed within an inside space of the external case, wherein the projection system includes a reflection member having a reflection surface capable of reflecting light received from a light source device to guide the light toward the opening, and projects the light to the outside of the external case via the opening; and a detection unit which detects a foreign material existing on the optical path of the light in the area of light exit of the opening.
Claims8
A projector comprising:
- a light source device;
- an external case provided with an opening through which light passes from the light source device;
- a projection system disposed within an inside space of the external case, wherein the projection system includes a reflection member having a concave surface so as to constitute a mirror of the reflection member, and projects the light to the outside of the external case via the opening;
- and
- a detection unit which detects a foreign material existing on the optical path of the light in an area of a light exit of the opening by detecting light reflected from the foreign material,
- wherein the opening is disposed in the vicinity of a converging point at which the light reflected by the concave surface of the mirror converges.
Dependencies are inferred from the claim text.