Electro-optic display device using phase transition mode liquid

Details Electro-optic display device using phase transition mode liquid Electro-optic display device using phase transition mode liquid

1980-12-19

1983-10-04

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340805, 350346, G09G 336

Patent

active

044082010

ABSTRACT:
A display device having an electro-optical display element such as a phase transition mode liquid crystal and a driving circuit. The driving circuit applies two square voltage waves to the electro-optical display element. Each of these waves has an effective voltage and a time interval of zero volts. One of the waves is applied to the selected display picture elements of the electro-optical display element and gives the selected elements a first state, e.g., a homeotropic state. The other is applied to the nonselected display picture elements and gives the nonselected elements a second state, e.g., a focal-conic state.

REFERENCES:
patent: 4048633 (1977-09-01), Sano
patent: 4100540 (1978-07-01), Fujita et al.
patent: 4186395 (1980-01-01), Fujita et al.
patent: 4257045 (1981-03-01), Miles
patent: 4317115 (1982-02-01), Kawakami et al.

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