Dispersion-type liquid crystal display element with oriented dic

Details Dispersion-type liquid crystal display element with oriented dic Dispersion-type liquid crystal display element with oriented dic

1992-06-24

1994-04-12

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 98, G02F 113

Patent

active

053030737

ABSTRACT:
A liquid crystal display element having a pair of substrates at least one of which is transparent, and a light control layer consisting of a dispersion type liquid crystal material held between the substrates. The dispersion type liquid crystal material consists of a supporting medium, liquid crystal molecules and a dichromatic dye which is oriented within the supporting medium. It is desirable to arrange a polarized light selecting element to cover the outer surface of one of the substrates. In one embodiment, the light control layer is of a laminate structure consisting of a first dispersion type liquid crystal layer prepared by allowing the dichromatic dye to be dispersed and oriented in a first direction within the supporting medium and a second dispersion type liquid crystal layer prepared by allowing another dichromatic dye, which is of the same type as that of the dichromatic dye dispersed in the first dispersion type liquid crystal layer, to be dispersed and oriented in a second direction within the supporting medium.

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patent: 5132815 (1992-07-01), Fergason
patent: 5194973 (1993-03-01), Isogai et al.

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