Variable transmission optical device

Details Variable transmission optical device Variable transmission optical device

1985-09-04

1990-02-20

Laroche, Eugene R.

G02F 101, G02F 117

Patent

active

049021109

ABSTRACT:
A variable transmission window comprises outer panes of glass 17 and 19 and a multi layer electrochromic device allowing variation in the optical transmission properties of the window. The device comprises a transparent electrically conductive layer 12 such as indium tin oxide, an electrochromic material 13 such as a transition metal oxide bronze, a solid electrolyte 14 which is a fast ion conductor of ions of the metal which dissolves in the electrochromic material, a second electrochromic material 15, and a second transparent electrically conductive layer 16. The electrochromic material may be MoO.sub.3 or WO.sub.3. The solid electrolyte 14 may be a Bordeaux glass of LiCl, Li.sub.2 O, B.sub.2 O.sub.3. A quantity of metal colouration atoms, for example lithium, may be transferred reversibly between the electrochromic layers 13 and 15 by applying potentials to contacts 21 and 22. A given quantity of metal coloration atoms produces a coloration of greater density in one electrochromic layer than in the other, for example by having one layer 15 thicker than the other layer 13.

REFERENCES:
patent: 3704057 (1972-11-01), Beegle
patent: 3819252 (1974-06-01), Giglia
patent: 4175838 (1979-11-01), Randin
patent: 4253742 (1981-03-01), Morita
patent: 4278329 (1981-07-01), Matsuhiro et al.
patent: 4488781 (1984-12-01), Giglia
patent: 4585312 (1986-04-01), Ishiwata et al.
patent: 4728177 (1988-03-01), Green
R. D. Rauh, S. F. Cogan & M. A. Parker; Materials for Electrochromic Windows; SPIE vol. 502 Optical Materials Technology for Energy Efficiency & Solar Energy Conversion III (1984); pp. 38-45.
Svensson & Gravqvist; Electrochromic Coatings for "Smart Windows"; SEIP vol. 502 Optical Materials Technology for Energy Efficiency & Solar Energy Conversion III (1984); pp. 30-37.

Affiliated with

Also associated with

Rating

Variable transmission optical device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable transmission optical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable transmission optical device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1612201