Invention Grant
- Patent Title: Active matrix type liquid crystal display apparatus
- Patent Title (中): 有源矩阵型液晶显示装置
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Application No.: US12244181Application Date: 2008-10-02
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Publication No.: US07684005B2Publication Date: 2010-03-23
- Inventor: Yuka Utsumi , Katsumi Kondo , Ikuo Hiyama , Osamu Itoh , Masahito Ohe , Kazuhiko Yanagawa , Keiichiro Ashizawa
- Applicant: Yuka Utsumi , Katsumi Kondo , Ikuo Hiyama , Osamu Itoh , Masahito Ohe , Kazuhiko Yanagawa , Keiichiro Ashizawa
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP7-273921 19951023; JP8-114739 19960509
- Main IPC: C09K19/02
- IPC: C09K19/02

Abstract:
A liquid crystal display apparatus includes a liquid crystal panel having polarizers, and a back light having a light source for illumination of the liquid crystal panel which has a characteristic of spectral transmittance required to satisfy the following equation, x>y>z, when a medium tone display voltage varies in a range between a minimum and maximum voltage for a Blue pixel, where “x” is a value of the transmittance in the panel at a wavelength corresponding to a longest wavelength in a range of wavelengths designated for blue light, “y” is a value of the transmittance in the panel at a wavelength corresponding to a maximum value of the intensity in a range of wavelengths designated for green light, and “z” is a value of the transmittance in the panel at a wavelength corresponding to a maximum value of the intensity in a range of wavelengths designated for red light.
Public/Granted literature
- US20090040438A1 Active Matrix Type Liquid Crystal Display Apparatus Public/Granted day:2009-02-12
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