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Ion-Depletion Display Technology

IP.com Disclosure Number: IPCOM000040279D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02

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Hoffman, HS [+details]


This article describes a display provided by an array of cells, the index of refraction of which is varied by selective application of electric fields. This display employs a variation of the long known Christiansen Effect, which historically uses temperature changes to alter the index of refraction. If small solid transparent particles are immersed in a fluid having a matching index of refraction, the particles do not scatter light which is passing through. For a particular wavelength, a change in index of the solution relative to the particles can cause scattering as a result of refraction. To enable use of this phenomenon to provide the information display described in this article, the effect is achieved by the use of the electric field applied to the solution.