Multipurpose liquid crystal display

Details Multipurpose liquid crystal display Multipurpose liquid crystal display

G - Physics

02

F

G02F 1/1335 (2006.01) G02B 5/124 (2006.01) G03B 21/00 (2006.01) G03B 21/132 (2006.01) G02F 1/1334 (2006.01)

Patent

CA 2116435

ABSTRACT OF THE DISCLOSURE A multipurpose liquid crystal display, suitable for use as a reflective display and as overhead projection panel, includes (a) a first transparent electrode means; (b) a second transparent electrode means; (c) a display medium positioned between the first and second transparent electrode means which display medium is switchable between a first state in which incident light is scattered and a second state in which the amount of such scattering is reduced; (d) a retroreflector removably positioned behind the second transparent electrode means and means for removably positioning the retroreflector behind the second trasparent electrode. Preferably, the display medium comprises positive dielectirc anisotropy, operationally nematic liquid crystals dispersed in a containment medium.

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