Electrochromic materials and displays

Details Electrochromic materials and displays Electrochromic materials and displays

1994-08-25

1996-03-19

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359269, 359265, G02F 1153

Patent

active

055007597

ABSTRACT:
Dispersions of electrically conductive particles useful for preparing electrically conductive, essentially ionically isolative composite layers having electrically conductive particles dispersed in a polymer matrix. Composite layers can be used in laminates for electrochromic displays where an ionically conductive layer is in contact with electrochromic material. Such displays comprise means for applying an electrical potential across the interface of the ionically conductive layer and the electrochromic material to generate an electrochromic effect at the interface. Electrochromic materials can be provided in the laminates as layers between the ionically conductive layer and the composite layer of electrically conductive particles dispersed in a polymer matrix. Alternatively, the electrochromic material can be incorporated in the conductive particles in the polymer matrix, e.g. as titanium dioxide coated with antimony tin oxide coated with polyaniline dispersed in an light transmitting polymer matrix. The materials of this invention allow for the high speed fabrication of flexible displays, e.g. by printing methods.

REFERENCES:
patent: 4550982 (1985-11-01), Hirai
patent: 4750817 (1988-06-01), Sammells
patent: 4810067 (1989-03-01), Demiryont
patent: 4902110 (1990-02-01), Green
patent: 5078480 (1992-01-01), Warszawski
patent: 5189549 (1993-02-01), Leventis et al.
patent: 5216536 (1993-06-01), Agrawal et al.
Nomura, et al., Journal of Macromolecular Science--Chemistry, A26 (2&3), pp. 593-608 (1989).

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