Title:
投写型表示装置およびそのための照明光学系
Document Type and Number:
Japanese Patent JP3726287
Kind Code:
B2
Abstract:
The structure of the present invention makes dark lines due to a central axis of a cross dichroic prism sufficiently inconspicuous. In a second lens array 130, minute lenses arranged on the same column include three different types of minute lenses 132a, 132b, and 132c having optical axes at different positions. Each row of the minute lenses 132 consists of one of the three types of minute lenses 132a, 132b, and 132c. Partial light fluxes respectively passing through the minute lenses 132a, 132b, and 132c have optical axes at different positions relative to a center of a lighting area 252a of a liquid-crystal light bulb 252, so as to illuminate different illumination areas 256la, 257la, and 258la.
Inventors:
Yoshitaka Ito
Toshiaki Hashizume
Toshiaki Hashizume
Application Number:
JP52028598A
Publication Date:
December 14, 2005
Filing Date:
October 27, 1997
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G02B3/00; G02B27/14; G02B27/28; G03B33/12; H04N9/31; H04N5/74; (IPC1-7): G03B21/00; G02F1/13; G02F1/13357; G03B21/14; G03B33/12; G09F9/00; H04N9/31
Domestic Patent References:
| JP9090510A | ||||
| JP8234205A | ||||
| JP7181392A | ||||
| JP6180444A |
Attorney, Agent or Firm:
Takao Igarashi
Takashi Shimoide
Hiroshi Ichikawa
Takashi Shimoide
Hiroshi Ichikawa
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