Title:
LIQUID CRYSTAL DISPLAY DEVICE AND PROJECTION TYPE DISPLAY DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP2624116
Kind Code:
B2
Abstract:
PURPOSE: To provide the liquid crystal display device and projection type display device which can obtain a high-contrast display image.
CONSTITUTION: An incidence-side polarizing plate 11, 1st and 2nd phase difference plates 12 and 13 which are equal in retardation, a liquid crystal cell 14, and a projection-side polarizing plate 15 are arranged and axes 25 and 26 of polarization are crossed at right angles along rubbing directions 19 and 20. The 1st phase plate 12 crosses a main illumination light beam 24 at right angles and the 2nd phase difference plate 13 is slanted by an angle γ from the right- angled crossing state. On a plane crossing the main illumination light beam 24 at right angles, projection components of phase delay axes 27 and 28 cross each other at right angles and are at an angle of 45° to projection components of the axes 25 and 26 of polarization. Then the phase difference that the liquid crystal cell 14 applied with a specific voltage gives to the main illumination light beam 24 is canceled by the 2nd phase difference plate 13 whose angle γis adjusted to put the light projected from the liquid crystal cell 14 closer from elliptic polarized light to linear polarized light.
Inventors:
Yoshihiro Masumoto
Hideki Ohmae
Hideki Ohmae
Application Number:
JP9583993A
Publication Date:
June 25, 1997
Filing Date:
April 22, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G02F1/13; G02F1/133; G02F1/1335; G02F1/13357; G02F1/13363; H04N5/74; (IPC1-7): G02F1/1335; G02F1/1335; G02F1/13
Attorney, Agent or Firm:
Tomoyuki Takimoto
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