Display having light scattering electro-optical element

Details Display having light scattering electro-optical element Display having light scattering electro-optical element

1991-02-11

1992-08-04

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 51, G02F 113

Patent

active

051364034

ABSTRACT:
A display having a first electrode means; a second electrode means; and a display medium positioned between the first and second electrode means, which display medium contains a pleochroic dye, is switchable between a first state in which incident light is substantially absorbed by the pleochroic dye and a second state in which the amount of such absorption is substantially reduced, and is capable of scattering incident light with a scattering half angle between about 5 and about 40 degrees when the display medium is in its second state, while permitting at least 10% of the incident light to be transmitted. The absolute difference between the ordinary index of refraction of the liquid crystal and the refractive index of the containment medium is 0.10 to 0.20.

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Haas, "Scattering Electro-Optic Cells," Xerox Disclosure Journal, vol. 3, No. 5, Sep./Oct. 1978, pp. 333-334.
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