Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1998-06-01
2000-10-10
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359265, 359275, G02F 1153
Patent
active
061307726
ABSTRACT:
Electrochromic device and method. In one disclosed embodiment, an electrochromic coating is applied to a light transmissive substrate, and a first control voltage is generated in accordance with the amount of light impinging upon the substrate. That control voltage is applied to the electrochromic coating to decrease the transmittance of the substrate as the light increases. Ambient light conditions are monitored to provide a second control voltage which is applied to the electrochromic coating to decrease the transmittance of the substrate when the ambient light falls below a predetermined level, e.g. at night. In other disclosed embodiments, the electrochromic coating is applied to the lenses of a pair of glasses and to a lamp shade, with photovoltaic cells for controlling the transmittance of the coating in accordance with the amount of impinging light.
REFERENCES:
patent: 4968127 (1990-11-01), Russell et al.
patent: 5377037 (1994-12-01), Branz et al.
patent: 5384653 (1995-01-01), Benson et al.
patent: 5923028 (1999-07-01), Turnbull et al.
Epps Georgia
Letendre Suzanne
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