Patent Number: 6,166,790

Title: Polarizer, optical element, lighting device and liquid crystal display

Abstract: Disclosed are (1) a polarizer having a function of separating incident light into polarized light through reflection and transmission, which has (a) a haze of 10% or less, or (b) a ratio of parallel transmitted light to incident light of 40 to 60%, (c) a ratio of mirror reflected light to the incident light of 25% or more, (d) a ratio of diffusion reflected light to the incident light of 20% or less or (e) a fraction of mirror reflected light to the whole reflected light of 60% or more; (2) an optical element comprising the polarizer, and a 1/4 wavelength formed by one or two or more retardation layers disposed on at least one side thereof; (3) a lighting device comprising a surface light source, and the polarizer or the optical element disposed thereon; and (4) a liquid crystal display comprising the lighting device and a liquid crystal cell arranged on the light outgoing side thereof, with a polarizing plate intervening therebetween.

Inventors: Kameyama; Tadayuki (Osaka, JP), Mihara; Hisashi (Osaka, JP), Motomura; Hironori (Osaka, JP), Takahashi; Naoki (Osaka, JP)

Assignee: Nitto Denko Corporation

International Classification: G02F 1/13 (20060101); G02F 1/1335 (20060101); G02B 5/30 (20060101); G02F 001/1335 (); C09K 019/02 ()

Expiration Date: 12/26/2017