Method and apparatus for readout of information from display pan

Details Method and apparatus for readout of information from display pan Method and apparatus for readout of information from display pan

1989-07-07

1991-01-01

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

350350S, 340784, G02F 113

Patent

active

049813404

ABSTRACT:
A display panel comprises a liquid crystal device including a pixel which comprises opposite electrodes and a ferroelectric liquid crystal disposed therebetween, and optical detection means. The written state of the pixel, i.e., the written information on the display panel, is read out by applying a detection signal voltage to the pixel and detecting a polarization current, if any, caused by the application of the voltage.

REFERENCES:
patent: 4070663 (1978-01-01), Kanatani et al.
patent: 4367924 (1983-01-01), Clark et al.
patent: 4548474 (1985-10-01), Nagae et al.
patent: 4649517 (1987-03-01), Kitazima et al.
patent: 4655561 (1987-04-01), Kanbe et al.
patent: 4719457 (1988-01-01), Kitazima et al.

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