Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-09-27
1993-08-10
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 73, G02F 11335
Patent
active
052354504
ABSTRACT:
A liquid crystal display apparatus includes a twist supertwisted nematic liquid crystal panel (1) including a liquid crystal layer (8) provided between first and second transparent substrates (2, 3), and a first phase plate group (11; 13, 14) including at least one uniaxially stretched polymer film arranged on the outer surface of the first substrate (2). The apparatus further includes a first polarizing plate (9) arranged on the first phase plate group (11; 13, 14) and a second phase plate group (12; 15, 16) including at least one uniaxially stretched polymer film arranged on the outer surface of the second substrate (3) and. Finally, the apparatus includes a second polarizing plate (10) arranged on the second phase plate group (12; 15, 16), wherein at least one of the uniaxially stretched polymer films (11, 12; 13, 14, 15, 16) has positive optical anisotropy and the others have negative optical anisotropy.
REFERENCES:
patent: 5124824 (1992-06-01), Kozaki et al.
patent: 5126866 (1992-06-01), Yoshimizu et al.
patent: 5138474 (1992-08-01), Arakawa
Kishimoto Keiko
Ohnishi Hiroshi
Yoshimizu Toshiyuki
Yoshimura Yumi
Gross Anita P.
Sharp Kabushiki Kaisha
Sikes William L.
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