Transflective liquid crystal display

Details Transflective liquid crystal display Transflective liquid crystal display

1981-07-06

1983-08-16

Corbin, John K.

350346, 350349, 350347R, G02F 113

Patent

active

043988059

ABSTRACT:
A transflective liquid crystal display is viewable by either reflected or transmitted light. The display utilizes at least one display cell of the guest dichroic dye-host liquid crystal material type, wherein the molecules are substantially parallel to the cell walls and have a helical twist in the unactivated state and are oriented substantially perpendicular to the cell walls in the activated state. A partially-reflective, partially-transmissive transflector element, which is non-depolarizing, is placed adjacent to the rear of the display cell and is followed by a light-retarding element, having its retardation axis placed at an angle, typically 45.degree. to the polarization axis of a subsequent linear-polarizing element. A light source, for use in the transmissive mode, is placed beyond the linear-polarizing element.

REFERENCES:
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3900248 (1975-08-01), Nagasaki
patent: 4025161 (1977-05-01), La Roche
patent: 4093356 (1978-06-01), Bigelow
patent: 4097130 (1978-06-01), Cole, Jr.
patent: 4126383 (1978-11-01), Doriguzzi et al.
patent: 4272162 (1981-06-01), Togashi et al.
Cole, Jr., H. et al., "A New Display Configuration for Dichroic Liquid Crystals," Society for Information Displays 1977 Digest, (Apr. 19-21, 1977), pp. 96-97.
"New Absorptive Mode Reflective Liquid-Crystal Display Device," D. L. White and G. N. Taylor, Journal of Applied Physics, vol. 45, No. 11, Nov. 1974, pp. 4718-4723.

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