Title:
【発明の名称】単板式カラープロジェクタ
Document Type and Number:
Japanese Patent JP3012841
Kind Code:
B1
Abstract:
Light emitted from a white light source is separated into red, green and blue light beams by dichroic mirrors. The resulting light beams are directed onto a lenticular lens system having large-pitch lenticular lenses and small-pitch lenticular lenses formed on opposed surfaces. This lens system converts the red, green and blue light beams incident on each of the large-pitch lenticular lenses into a color band set consisting of a set of separated subbands of the red, green and blue light beams the diameter of which is narrowed down to one-third or less of that of the incident light beam through the small-pitch lenticular lenses. The resulting color band sets emerging from the small-pitch lenticular lenses are focused onto a DMD panel through a mirror galvanometer and a coupling lens. The mirror galvanometer is rotated in such a way as to move the color band sets over the DMD panel up and down by the amount corresponding to the pitch of the color band sets while the DMD panel is being driven. Modulated light from the DMD panel is projected onto a screen through a projection lens.
Inventors:
Yoshimoto Ishikawa
Harabata Mitsuo
Kaneko Akinori
Harabata Mitsuo
Kaneko Akinori
Application Number:
JP31312598A
Publication Date:
February 28, 2000
Filing Date:
November 04, 1998
Export Citation:
Assignee:
IBM Japan, Ltd.
Apty Co., Ltd.
Apty Co., Ltd.
International Classes:
G02B27/18; G02F1/13; G02F1/1335; G02F1/13357; G03B21/14; G03B33/12; H04N5/74; H04N9/31; (IPC1-7): G02B27/18; G02F1/13; G02F1/1335; G03B21/14; G03B33/12; H04N9/31
Domestic Patent References:
| JP1152290A | ||||
| JP1062715A | ||||
| JP9318904A |
Attorney, Agent or Firm:
Takehiko Suzue (5 outside)