Electrochromic devices having a gradient of color intensities

Details Electrochromic devices having a gradient of color intensities Electrochromic devices having a gradient of color intensities

1988-10-05

1990-05-08

LaRoche, Eugene R.

G02F 117

Patent

active

049232894

ABSTRACT:
This invention is directed to electrochromic devices having a color intensity gradient. Specifically the electrochromic device comprises two substrates and therebetween: one electrode layer; an electrochromic layer; an ion conductive material; and another electrode layer in that order. At least one of the electrode layers is transparent and each electrode layer is in contact with a respective one of the substrates. The ion conductive layer is adapted to communicate ions to and from the electrochromic material upon the application of a voltage across the electrode layers. The electrochromic material has a continuously decreasing thickness gradient in at least one region when measured normal to the plane of an electrode layer.

REFERENCES:
patent: 3578843 (1971-05-01), Castellion
patent: 4529275 (1985-07-01), Ballmer
patent: 4728177 (1988-03-01), Green
patent: 4832468 (1989-05-01), Ito et al.

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