Light source device and projector
AssigneeSeiko Epson Corporation
InventorsTaisuke Yamauchi, Takashi Takeda, Masayuki Takagi
Life of this patent
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Abstract
A light source device adapted to generate an illumination light beam for illuminating an illuminated surface includes a light source adapted to emit a light beam, a light path conversion member adapted to rotate around an axis perpendicular to a center axis of the light beam emitted from the light source to convert a light path of the light beam emitted from the light source, an overlapping illumination element adapted to overlap a light beam emitted from the light path conversion member on the illuminated surface, the overlapping illumination element having an entrance position of the light bream input to the overlapping illumination element varies with time, and a rotating section adapted to rotate the light path conversion member.
Claims16
A light source device adapted to generate an illumination light beam for illuminating an illuminated surface, comprising:
- a light source adapted to emit a light beam;
- a light path conversion member adapted to rotate around an axis perpendicular to a center axis of the light beam emitted from the light source to convert a light path of the light beam emitted from the light source;
- an overlapping illumination element adapted to overlap a light beam emitted from the light path conversion member on the illuminated surface, the overlapping illumination element having an entrance position on its surface for the light beam transmitted through the light path conversion member that varies in time in accordance with the rotation of the light path conversion member, wherein the illumination element illuminates the same area independent of the entrance position of the light beam;
- and
- a rotating element adapted to rotate the light path conversion member.
A projector comprising:
- a light source device adapted to generate an illumination light beam for illuminating an illuminated surface including
- a light source adapted to emit a light beam,
- a light path conversion member adapted to rotate around an axis perpendicular to a center axis of the light beam emitted from the light source to convert a light path of the light beam emitted from the light source,
- an overlapping illumination element adapted to overlap a light beam emitted from the light path conversion member on the illuminated surface, the overlapping illumination element having an entrance position on its surface for the light beam transmitted through the light path conversion member that varies in time in accordance with the rotation of the light path conversion member, wherein the illumination element illuminates the same area independent of the entrance position of the light beam, and
- a rotating element adapted to rotate the light path conversion member;
- a light modulation device adapted to modulate the light beam emitted from the light source device in accordance with an image signal to form an image;
- and
- a projection section adapted to project the image formed by the light modulation device.
Dependencies are inferred from the claim text.