Title:
プロジェクタ
Document Type and Number:
Japanese Patent JP4803236
Kind Code:
B2
Abstract:
A projector comprises: a light source device 110; an electro-optic device 300 being a reflective-type liquid crystal device that modulates light emitted from the light source device 110, wherein the reflective-type liquid crystal device is perpendicular to the center axis of the light illuminating the device; a polarizer 200 that is disposed on a light incoming side of the reflective-type liquid crystal device and a light outgoing side of the reflective-type liquid crystal device; and a projection optical system 500 that projects light output from the reflective-type liquid crystal device, wherein the polarizer 200 is a structural birefringent polarizing plate, the structural birefringent polarizing plate having a substrate 210 and a plurality of fine structures 211, 212, each of the plurality of fine structures being formed along a first direction perpendicular to a line that is normal to a light incoming surface of the structural birefringent polarizing plate, and the plurality of fine structures 211, 212 being periodically formed in a second direction perpendicular to the first direction and to the normal line, and the structural birefringent polarizing plate is inclined to a center axis of light, illuminating the reflective-type liquid crystal device, in such a manner that a pitch of the plurality of fine structures 211, 212 relative to light entering the structural birefringent polarizing plate is reduced, the light emitted from the light source device entering the structural birefringent polarizing plate from the fine structures 211, 212 and illuminating the reflective-type liquid crystal device.
Inventors:
Yoshitaka Ito
Hidefumi Sakata
Hidefumi Sakata
Application Number:
JP2008275020A
Publication Date:
October 26, 2011
Filing Date:
October 27, 2008
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G03B21/00; G02B5/18; G02B5/30; G02B27/28; G02F1/13; G02F1/1335; H04N5/74
Domestic Patent References:
| JP8334623A | ||||
| JP9005699A |
Attorney, Agent or Firm:
Meisei International Patent Office