Invention Grant
- Patent Title: Liquid crystal panel and liquid crystal display apparatus
- Patent Title (中): 液晶面板和液晶显示装置
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Application No.: US11996539Application Date: 2007-04-17
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Publication No.: US07643117B2Publication Date: 2010-01-05
- Inventor: Toshiyuki Iida , Akinori Izaki , Hisae Sugihara , Yutaka Ohmori
- Applicant: Toshiyuki Iida , Akinori Izaki , Hisae Sugihara , Yutaka Ohmori
- Applicant Address: JP Ibaraki-shi, Osaka
- Assignee: Nitto Denko Corporation
- Current Assignee: Nitto Denko Corporation
- Current Assignee Address: JP Ibaraki-shi, Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2006-132418 20060511
- International Application: PCT/JP2007/058305 WO 20070417
- International Announcement: WO2007/132618 WO 20071122
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02F1/1337

Abstract:
There is provided a liquid crystal panel, in which a color shift in an oblique direction is small even when observed from any azimuth angle of 0° to 360°, and the viewing angle in the horizontal direction is wide. A liquid crystal panel according to the present invention includes: a liquid crystal cell; a first polarizer placed on one side of the liquid crystal cell; a second polarizer placed on the other side of the liquid crystal cell; and a first optical compensation layer and a second optical compensation layer placed between the first polarizer and the second polarizer, wherein: the first optical compensation layer is placed between the first polarizer and the liquid crystal cell; a slow axis direction of the first optical compensation layer is substantially perpendicular to an absorption axis direction of the first polarizer; the first optical compensation layer has a refractive index profile of nx>ny≧nz; the first optical compensation layer includes a retardation film (A) which contains a polyvinyl acetal-based resin and whose in-plane retardation value (Re[750]) at a wavelength of 750 nm is larger than an in-plane retardation value (Re[550]) at a wavelength of 550 nm; the second optical compensation layer is placed between the first optical compensation layer and the second polarizer; and the second optical compensation layer has a refractive index profile of nx=ny>nz.
Public/Granted literature
- US20090046224A1 LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS Public/Granted day:2009-02-19
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