Title:
ANTI-GLARE DEVICE EXHIBITING PHOTO-INDUCED DICHROISM
Document Type and Number:
WIPO Patent Application WO2002029489
Kind Code:
A3
Abstract:
A device (100, 140, 150) for differentially absorbing light, depending on the state of linear polarization of the light, is disclosed. This polarizing effect is induced and controllable by the level of ambient light impinging on the device. The device (100) includes a carrying medium which may be a film (142) or opposed substrates (112) that are sealed. A film or the opposed substrates carry a mixture (120) of fluid material (124), which is preferably a liquid crystal and photochromic dyestuffs (122), wherein the photochromic material is activated upon the detection of ultraviolet light so as to absorb some of the light and wherein the energization of the photochromic (100) material effects the material so as to simultaneously selectively absorb the specularly reflected sunlight while permitting all light to pass in dimly lit environments. The device (150) may allow for electrical control of the absorptive properties.
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Inventors:
KOSA TAMAS
PALFFY-MUHORAY PETER
TAHERI BAHMAN
PALFFY-MUHORAY PETER
TAHERI BAHMAN
Application Number:
PCT/US2001/042379
Publication Date:
August 21, 2003
Filing Date:
September 28, 2001
Export Citation:
Assignee:
ALPHAMICRON INC (US)
International Classes:
G02F1/133; G02F1/139; A61F9/02; (IPC1-7): G02F1/133; G02B5/30; G02F1/139
Domestic Patent References:
| WO2000019252A1 | 2000-04-06 |
Foreign References:
| GB2169417A | 1986-07-09 | |||
| US4728173A | 1988-03-01 | |||
| US5615032A | 1997-03-25 | |||
| US3653863A | 1972-04-04 | |||
| US5552841A | 1996-09-03 | |||
| US4039254A | 1977-08-02 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 010, no. 223 (P - 483) 5 August 1986 (1986-08-05)
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30)
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30)
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