Invention Grant
- Patent Title: Liquid crystal display apparatus
- Patent Title (中): 液晶显示装置
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Application No.: US10865217Application Date: 2004-06-10
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Publication No.: US07274348B2Publication Date: 2007-09-25
- Inventor: Tomoo Izumi , Mitsuyoshi Miyai , Jun Yamada , Masakazu Okada , Keiichi Furukawa
- Applicant: Tomoo Izumi , Mitsuyoshi Miyai , Jun Yamada , Masakazu Okada , Keiichi Furukawa
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Holdings, Inc.
- Current Assignee: Konica Minolta Holdings, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2004-034309 20040210
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
A liquid crystal display apparatus which have a circular polarizer and a liquid crystal display in a stack. The liquid crystal display has a chilral nematic liquid crystal layer between substrates, and on the mutually opposite sides of the substrates, electrodes and aligning layers are formed. The liquid crystal switches between a planar alignment state and a focal-conic alignment state depending on the voltage applied thereto through the electrodes. In a planar state, light reflected by the electrodes is absorbed by the circular polarizer, and a black display is made. In a focal-conic state, light reflected by the electrodes passes through the circular polarizer, and a white display is made. The liquid crystal is driven by a chain of voltage pulses including a reset step of resetting the liquid crystal to a homeotropic state, a selection step of selecting the alignment state of the liquid crystal under zero-volt application and an evolution step of causing the liquid crystal to evolve to the selected alignment state.
Public/Granted literature
- US20050174317A1 Liquid crystal display apparatus Public/Granted day:2005-08-11
Information query
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