Projection type display apparatus

Details Projection type display apparatus Projection type display apparatus

G - Physics

03

B

G03B 21/00 (2006.01) G02B 13/16 (2006.01) G02B 19/00 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2447285

A projection type display apparatus is composed of a light source (101), an illumination optical system (102) for forming illumination light, a reflection type light valve (106) for reflecting the illumination light to form an optical image, a projection optical system (107) for projecting the optical image, and a lens (105) with a positive power. An optical axis (115) of the reflection type light valve, an optical axis (113) of the projection optical system, and an optical axis (114) of the lens with a positive power are matched with each other. The illumination optical system (102) is placed so that the illumination light passes through the lens (105) with a positive power and is reflected from the reflection type light valve (106). An output pupil (108) of the illumination optical system (102) and an entrance pupil (109) of the projection optical system (107) are placed so as to have a conjugate relationship with respect to the lens (105) with a positive power.

L'invention concerne un dispositif de projection qui comprend une source lumineuse (101), un système optique d'éclairage (102) formant une lumière d'éclairage, une ampoule réfléchissante (106) formant une image optique par réflexion de la lumière d'éclairage, un système optique de projection (107) pour projeter l'image optique, et une lentille convergente (105). L'axe optique (115) de l'ampoule réfléchissante, celui (113) du système de projection et celui (114) de la lentille convergente sont alignés entre eux ; le système d'éclairage (102) est placé de sorte que la lumière d'éclairage est réfléchie par l'ampoule réfléchissante (106) après avoir traversé la lentille convergente (105) ; le rayon sortant (108) du système optique d'éclairage (102) et le rayon incident (109) du système optique de projection (107) sont placés de manière à se conjuguer avec la lentille convergente (105)

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