Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1998-08-26
2000-01-18
Nelms, David
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359265, 359267, 359268, 359270, 359273, 359274, 359275, G02F 1153
Patent
active
060162155
ABSTRACT:
Single-compartment, self-erasing, solution-phase electrochromic devices, solutions of electrochromic compounds for use as media of variable transmittance in such devices, and electrochromic compounds for such solutions are provided. The devices of the invention are surprisingly stable to cycling between light and dark states, have continuously variable transmittance to light as a function of electrical potential applied across the solution in a device, and have transmittance that can be varied over more than a factor of 10, from clear to dark or from dark to clear, in several seconds. Thus, the devices are especially suitable as variable transmittance components of variable transmission light filters, including windows, and variable reflectance mirrors, including anti-glare rearview mirrors in automobiles. Also provided are improved variable reflectance mirrors, wherein transmittance of reflected light is varied by thermochromic, photochromic or electro-optic means and wherein the reduction in transmittance which is required to eliminate perceptible reflection of an object to the eyes of an observer is reduced by disposing the plane of the highly reflective surface of the mirror at an angle with respect to the plane of the surface through which light from the object enters the mirror.
REFERENCES:
patent: 2632045 (1953-03-01), Sziklai
patent: 3280701 (1966-10-01), Donnelly et al.
patent: 3451741 (1969-06-01), Manos
patent: 3806229 (1974-04-01), Schoot et al.
patent: 3843232 (1974-10-01), Berets
patent: 3879108 (1975-04-01), Berets
patent: 4088392 (1978-05-01), Meyers
patent: 4146876 (1979-03-01), Arellano et al.
patent: 4174152 (1979-11-01), Giglia et al.
patent: 4278329 (1981-07-01), Matsuhiro et al.
patent: 4416517 (1983-11-01), Beall et al.
patent: 4465339 (1984-08-01), Baucke et al.
patent: 4671619 (1987-06-01), Kamimori et al.
patent: 4712879 (1987-12-01), Lynam et al.
patent: 4752119 (1988-06-01), Ueno et al.
patent: 5128799 (1992-07-01), Byker
patent: 5751467 (1998-05-01), Byker
T. Ueno et al., "Three Color Switching Electrochromic Display Using Organic Redox-Pair Dyes", vol. 24, No. 3 Japanese Journal of Applied Physics (Mar. 1985) pp. L178-L180.
J. Bruinink, "Electrochromic Display Devices", published in Nonemissive Electrooptic Displays, A. R. Kmetz and F. K. von Willisen eds. (New York 1976) pp. 201-221.
B. W. Faughnan et al., "Electrochromic Displays Based on WO.sub.3 ", published in Display Devices, J. I. Parkove ed. (New York, 1980).
J. Nagai et al., "Transmissive Electrochromic Device", in Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, vol. 562 Proceedings of SPIE, (Aug. 1985) pp. 39-45.
Schott information, No. 1 1983-English.
K. L. Chopra et al., "Transparent Conductors-A Status Review" in Thin Solid Films, International Journal on the Science and Technology of Thin and Thick Films, J.N. Zemel and G. Siddall eds., vol. 102 No. 1, (Apr. 8, 1983), pp. 1-46.
T. Kamimori et al., "Electrochromic Devices For Transmissive and Reflective Light Control", in Optical Materials Technology for Energy Efficiency and Solar Energy Conversion V, vol. 653, SPIE-The Int'l Soc. Opt. Eng'g, Washington (Apr. 1986), pp. 2-9.
C. M. Lampert, "Electrochromic Materials and Devices for Energy Efficient Windows", Solar Energy Mat'ls., vol. 11 (1984), pp. 1-27.
I. V. Shelepin and O. A. Ushakov, "Photochemical and Cathodic Production of Methyl Viologen in Solution", Russian J. Phys. Chem. 49 (7) (1975), pp. 1021-1024 (translation).
Gruver and Kuwana, "Spectroelectrochemical Studies of E. E. and E. E. C. Mechanisms", J. Electro Anai. Chem. 36 (1972), pp. 85-99.
Strojek et al., "Direct Log Ratio Recording, Rapid Scanning Spectrophometer", Anai. Chem, 41, pp. 481-484 (1969).
Nelson et al., "Anodic Oxidation of 5, 10-Dihydro-5, 10-Dimethylphenazine", Z. Anai. Chem. 224, (1967), pp. 184-196.
N. Lynam, "Transparent Electronic Conductors", in Proceedings of the Symposium on Electrochromic Materials, M. Carpenter and D. Corrigan eds. (New Jersey), pp. 201-231 (.about.1976).
Donnelly Press Release, "Donnelly Corporation Announces New Automatic Electrochromic Mirror", Dec. 20, 1989 (Holland, Michigan), Contact Maryan Komejan, pp. 1-4.
O. A. Ushakov et al., "Electrochromism of Organic Compounds Some Properties of Two-Electrode Cells", in UDC 541.138, (1978), pp. 271-274.
I. V. Shelepin et al., "Electrochromism of Organic Compounds I. Electrochemical and Spectral Properties of a System Based on Methylviologen and 3-Ethyl-2-Benzothiazolone Azine", in UDC 541.138, pp. 24-28 (May 1975).
I. V. Shelepin et al., "Electrochromism of Organic Compounds II. Spectral and Electrochemical Examination of a System Based on Methylviologen and 5, 10-Dithydro-5, 10-Dimethylphenazine", in UDC 541.138, pp. 346-349 (Apr. 1976).
Gentex Corporation
Lester Evelyn A.
Nelms David
Rees Brian J.
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