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Title:
PROJECTOR
Document Type and Number:
Japanese Patent JP2012198457
Kind Code:
A
Abstract:

To provide a projector that suppresses a decline in a contrast ratio.

In a projector, a rotational angle φ0 of an alignment axis 49 of a liquid crystal layer, a rotational angle φ1 of a transmission axis 29 of an incident side polarizer, a rotational angle φ2 of a transmission axis 33 of a wire grid element, and a rotational angle φ3 of a transmission axis 36 of an emission side polarizer, with respect to a rotational angle of each axis from a reference direction on a reference plane when projecting on the reference plane orthogonal to a thickness direction of the liquid crystal layer, satisfy all of expressions: expression(1);44°≤φ02<45°or 45°<φ02≤46°, expression(2);f1≤φ1≤f2, f1=0.191×φ22+0.986×φ2-14.435, f2=-0.191×φ22+0.986×φ2+14.435, and expression(3); g1≤φ1≤g2, g1=0.064×φ33+0.841×φ33+1.525×φ33-1.46, g2=0.064×φ33-0.841×φ33+1.525×φ33+1.46.


Inventors:
SAWATARI SAE
Application Number:
JP2011064008A
Publication Date:
October 18, 2012
Filing Date:
March 23, 2011
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
G02F1/1335; G02B3/00; G02B5/30; G02B19/00; G02F1/13; G03B21/14
Domestic Patent References:
JP2004126496A2004-04-22
JP2007101764A2007-04-19
JP2008275798A2008-11-13
JP2004126496A2004-04-22
Foreign References:
US20040263806A12004-12-30
Attorney, Agent or Firm:
上柳 雅誉
宮坂 一彦
須澤 修