Invention Grant
- Patent Title: Transmissive screen and rear projector
- Patent Title (中): 透射屏幕和后投影机
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Application No.: US10647302Application Date: 2003-08-26
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Publication No.: US07167306B2Publication Date: 2007-01-23
- Inventor: Masafumi Sakaguchi , Hideto Yamashita
- Applicant: Masafumi Sakaguchi , Hideto Yamashita
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2002-255256 20020830; JP2003-062066 20030307
- Main IPC: G03B21/60
- IPC: G03B21/60 ; G03B21/56

Abstract:
The present invention provides an excellent transmissive screen allowing a well-balanced increase in the vertical, horizontal, and oblique viewing angle characteristics for enhancing the viewing angle characteristics, and a rear projector including the transmissive screen. A transmissive screen can include a Fresnel lens portion having Fresnel lens components on its light-exiting surface, and a microlens array portion disposed at the light-exiting surface side of the Fresnel lens portion and having many microlenses on its light-incident surface. The microlenses of the microlens array portion are arrayed vertically and horizontally such that adjacent microlenses have common sides and the microlens array portion is rotated by 45°.
Public/Granted literature
- US20040075900A1 Transmissive screen and rear projector Public/Granted day:2004-04-22
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