Title:
プロジェクタ
Document Type and Number:
Japanese Patent JP4089725
Kind Code:
B2
Abstract:
The projector 1 comprises a light source device 411, a color separating optical system 42, liquid crystal panels 441, 441R, 441G and 441B, a cross dichroic prism 444, and a projection lens 46, in which an optical filter 500 is disposed for reflecting a predetermined spectral component in the light flux between a dichroic mirror 421 and a dichroic mirror 422 where an angle by which the light flux expands falls within 20 DEG with respect to an illumination optical axis L of the light flux on an optical path from the light source device 411 to a light flux-emitting surface of the projecting lens 46. Thus, carrying out spectrum correction can prevent the contrast degradation of the projected image. Furthermore, it allows the difference of an incident angle to the light flux-incident surface of the light flux to be smaller, thereby reducing color unevenness.
Inventors:
Kyori Ogawa
Hirohisa Nakano
Hirohisa Nakano
Application Number:
JP2005503164A
Publication Date:
May 28, 2008
Filing Date:
March 08, 2004
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G03B21/00; G02F1/13357; G03B21/14; H04N9/31
Domestic Patent References:
| JP2000347292A | ||||
| JP2000347287A | ||||
| JP5257115A | ||||
| JP2001264744A | ||||
| JP2001228536A | ||||
| JP2001092419A | ||||
| JP11249098A |
Attorney, Agent or Firm:
Masahiko Ueyanagi
Osamu Suzawa
Osamu Suzawa