Invention Grant
- Patent Title: Liquid crystal projector
- Patent Title (中): 液晶投影仪
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Application No.: US11571368Application Date: 2005-06-13
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Publication No.: US07659946B2Publication Date: 2010-02-09
- Inventor: Yasuhiro Shirasaka , Hitoshi Inukai , Tomoya Yano
- Applicant: Yasuhiro Shirasaka , Hitoshi Inukai , Tomoya Yano
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sonnenschein Nath & Rosenthal LLP
- Priority: JP2004-191938 20040629
- International Application: PCT/JP2005/010796 WO 20050613
- International Announcement: WO2006/001188 WO 20060105
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
Disclosed is a transmissive liquid crystal projector carrying a vertical alignment liquid crystal device. The liquid crystal projector includes a liquid crystal panel (25), on the light incident side and on the light radiating side of which a light incident side polarizing plate (24) and a light radiating side light polarizing plate (26) are arranged, respectively. A first polarized light component in a light beam collected by an illuminating optical system is transmitted through the light incident side polarizing plate (24) and routed to the liquid crystal panel (25). An optical anisotropic device (45), tilted by a preset angle correlated with the direction of alignment of liquid crystal molecules in the liquid crystal panel (25), that is, a pre-tilt angle, is arranged between the light incident side polarizing plate (24) and the liquid crystal panel (25) or between the light radiating side light polarizing plate (26) and the liquid crystal panel (25). By so doing, a high contrast ratio may be maintained, while transmittance of the liquid crystal panel may be improved.
Public/Granted literature
- US20080043158A1 Liquid Crystal Projector Public/Granted day:2008-02-21
Information query
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