1989-11-20
1991-04-09
Miller, Stanley D.
350350S, G02F 1133
Patent
active
050059530
ABSTRACT:
A liquid crystal element has a pair of substrates including electrodes and uniaxial orientation-processing axes, a ferroelectric smectic liquid crystal having a temperature range for producing a smectic A phase, under an orientation state having at least two different average molecular axes disposed between the pair of substrates which are set at a distance sufficiently small for suppressing a spiral alignment structure of the ferroelectric smectic liquid crystal on the occasion of no field application, and a polarizer and an analyzer. The ferroelectric smectic liquid crystal, on the occasion of being set within a temperature range for a smectic A phase, produce a .vertline.T.sub.A -T.sub.B .vertline. value no larger than 4% the maximum value thereof within a wavelength range of 440-600 nm, and at the same time being under an orientation state for producing an angle between two different average molecular axes on the occasion of no voltage application smaller than an angle between two different average molecular axes on the occasion of voltage application, where TA(%) is transmittance produced under an orientation state having one average molecular axis under a disposition of the polarizer and the analyzer on the occasion of setting 90.degree. cross nicols in the darkest state, and subsequently rotating only the analyzer clockwise by 15.degree. with regard to the processing direction of an incident light from the darkest state at the temperature range of smectic A phase, T.sub.B being transmittance under an orientation state having another average molecular axis under a disposition of the polarizer and the analyzer on the occasion of rotating only the analyzer counterclockwise by 15.degree. with regard to the proceeding direction of the incident light from said darkest state at the temperature range of smectic A phase.
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Canon Kabushiki Kaisha
Gross Anita Pellman
Miller Stanley D.
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