Information display device having a liquid crystal cell

Details Information display device having a liquid crystal cell Information display device having a liquid crystal cell

1979-06-11

1985-06-11

Corbin, John K.

350337, 350347E, G02F 113

Patent

active

045224684

ABSTRACT:
This device uses a cell with liquid crystal provided between polarizers. The polarizing means and analyzing means are constructed and positioned so that the light transmission is zero at a voltage Vm on the cell, said voltage Vm being larger than the voltage which corresponds to the optical threshold of the cell.
The transmission of the cell as a function of the supplied voltage increases considerably above the voltage value Vm.
The device is controlled by means of signal voltages which exceed Vm and which show a small voltage swing, while simultaneously a strong light transmission and a good contrast are obtained, which permits of using an information addressing according to lines and columns when a large number of lines are used.

REFERENCES:
patent: 3977767 (1976-08-01), Okuma et al.
patent: 4097128 (1978-06-01), Matsumoto et al.
patent: 4239349 (1982-12-01), Scheffer

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