Electrochromic display device

Details Electrochromic display device Electrochromic display device

1982-03-25

1985-06-04

Arnold, Bruce Y.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340785, 350320, G02F 117

Patent

active

045210810

ABSTRACT:
A process for forming an electrochromic film to be used in an electrochromic device is provided. The process includes a step of introducing a mixture of oxygen gas and inert gas at a predetermined mixing ratio into a reactor in which is provided an electrode having thereon a sheet of tungsten as a target and a counter-electrode holding thereon a substrate under a predetermined total pressure condition and a step of applying a predetermined voltage between said electrodes while maintaining the substrate at a predetermined temperature. The present process allows to provide a WO.sub.3 -sputtered film on the substrate. The present invention also provides an electrochromic display device in which the electrochromic film is operated under control not to reach the color saturation condition, thereby preventing the occurrence of separation of the film and thus ensuring a long-term servicelife.

REFERENCES:
patent: 4258984 (1981-03-01), Beni et al.
patent: 4416516 (1983-11-01), Beni et al.

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