Electrochromic system with less than 30 seconds switching time

Details Electrochromic system with less than 30 seconds switching time Electrochromic system with less than 30 seconds switching time

1990-07-11

1992-06-23

Hille, Rolf

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359275, 359273, G02F 101

Patent

active

051248336

ABSTRACT:
The invention relates to an electrochromic glazing consisting of two glass sheets (1, 4) coated with first and second transparent electroconductive layers (2, 5), separated by a layer of an electrochromic material (9), an electrolyte (8) and a counterelectrode (7), said transparent electroconductive layers (2, 5) each being provided with an electroconductive strip (3, 6) parallel to the length of the glazing, made of a material whose electric conductivity is high relative to that of transparent electroconductive layers (2, 5). The electroconductive strips (3, 6) are placed along the opposite edges of the glazing and are connected to a voltage generator which applies in coloring phase (or in fading phase), between two points A and B on the electroconductive strips (3, 6) a potential difference U.sub.1 =(V.sub.A -V.sub.B) (t) so that between point A on the electroconductive strip on the first electroconductive layer and a point R on the second electroconductive layers, directly facing point A, there is a potential difference U.sub.2 =(V.sub.A -V.sub.R) (t)=U.sub.o , where U.sub.o is constant and chosen from the stability range of the coloring (or fading) reaction.

REFERENCES:
patent: 4346964 (1982-08-01), Ishihama
patent: 4801195 (1989-01-01), Kawai
patent: 4807977 (1989-02-01), Sammells
patent: 4824221 (1989-04-01), Endo et al.
patent: 4844591 (1989-07-01), Arribart
patent: 4865428 (1989-09-01), Corrigan
patent: 4902110 (1990-02-01), Green
patent: 4927246 (1990-05-01), Ito et al.

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