Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Patent
1996-12-06
1998-09-29
Gross, Anita Pellman
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
345 5, 345102, 362 84, G02F 11335, G09G 500, G09G 336, F21V 916
Patent
active
058152288
ABSTRACT:
An LCD has a layer of phosphorescent material which emits light at a predetermined frequency and intensity following stimulation by either ambient light or a backlight. In a preferred embodiment, a backlight LED is driven by low duty cycle voltage pulses which periodically refresh the phosphorescence of the phosphorescent layer. The phosphorescent layer may be provided by coating the rear polarizer of the LCD with a phosphor-based emulsion or by applying a thin film of phosphorescent material to the back of the LCD. In an embodiment of the invention, a transflective LCD has a layer of phosphorescent material disposed between a rear polarizer and a transflector.
REFERENCES:
patent: 3950078 (1976-04-01), Zatsky
patent: 4167307 (1979-09-01), Cirkler et al.
patent: 4394069 (1983-07-01), Kaye
patent: 4799050 (1989-01-01), Prince
patent: 4882617 (1989-11-01), Vriens
patent: 5019808 (1991-05-01), Prince et al.
patent: 5146355 (1992-09-01), Prince et al.
patent: 5402143 (1995-03-01), Ge et al.
patent: 5408344 (1995-04-01), Takiguchi et al.
patent: 5442523 (1995-08-01), Kashima et al.
Amperex Technical Publication, "Liquid Crystal Displays . . . Principles and Applications" pp. 1-16.
Greg Brookshire, "Embedded LCD Driver Study" Ericsson ASIC Group pp. 5&6.
Epson LCD Module for Mobile Communication Product Catalog, 1995.
Overheads from Philips Liquid Crystal presentation, Jan. 25, 1996.
Angelo Efthyvoulidis "A Design Method for Sunlight Readable Displays".
Ericsson Inc.
Gross Anita Pellman
Hall David C.
Nguyen Tiep H.
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