Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-09-25
2007-09-25
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S101000, C349S176000
Reexamination Certificate
active
10865217
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.
REFERENCES:
patent: 7064737 (2006-06-01), Lee et al.
patent: 2001/0024188 (2001-09-01), Masazumi et al.
patent: 2001-228459 (2001-08-01), None
patent: WO98/50804 (1998-11-01), None
SID International Symposium Digest of Technical Paper, vol. 29, 1998, 31.1: Invited Paper: “Reflective Color Display Using Cholesteric Liquid Crystals”, Hashimoto et al., Minolta Col., Ltd., Osaka, Japan, pp. 897-900.
Furukawa Keiichi
Izumi Tomoo
Miyai Mitsuyoshi
Okada Masakazu
Yamada Jun
Abdulselam Abbas
Brinks Hofer Gilson & Lione
Hjerpe Richard
Konica Minolta Holdings Inc.
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