Compositions – Light transmission modifying compositions – Displaying color change
Patent
1997-09-04
2000-04-04
Kelly, C. H.
Compositions
Light transmission modifying compositions
Displaying color change
252582, 359273, 359275, G02B 523, G02F 1153
Patent
active
060457252
ABSTRACT:
An optical device is provided as an optical filter including a pair of substrates at least one of which is transparent, at least one transparent electrode disposed on one side of the transparent substrate, at least one counter electrode, a spacer provided between a pair of the substrates at peripheries thereof, and an RED solution as a filtering material provided in a space between a pair of the substrates. The RED solution includes a silver salt and a mixed solvent, preferably DMSO and another solvent, for dissolving the silver salt. The transparent electrodes and the counter electrode are driven by applying a voltage thereto, and the silver salt is reversibly deposited and dissolved by controlling the voltage. The RED solution is brought to be colored and to be colorless, respectively, so that an amount of light passing through the device may be adjusted.
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Miyagaki Hideharu
Udaka Toru
Kelly C. H.
Sony Corporation
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