The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2007
Filed:
Jun. 10, 2004
Tomoo Izumi, Toyonaka, JP;
Mitsuyoshi Miyai, Ibaraki, JP;
Jun Yamada, Takatsuki, JP;
Masakazu Okada, Kyoto, JP;
Keiichi Furukawa, Suita, JP;
Tomoo Izumi, Toyonaka, JP;
Mitsuyoshi Miyai, Ibaraki, JP;
Jun Yamada, Takatsuki, JP;
Masakazu Okada, Kyoto, JP;
Keiichi Furukawa, Suita, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
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.