Stacked electro-optic display

Details Stacked electro-optic display Stacked electro-optic display

1980-07-25

1982-12-14

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340716, 350335, G09G 336

Patent

active

043640397

ABSTRACT:
A visual display and method for producing the same. A plurality of electro-optic cells, such as liquid crystal cells, are placed in an optical series. Each of the cells receives approximately simultaneous identical signals. Due to the series relationship, the resulting contrast ratio will be significantly improved. The transmission function acting on the entering light will be squared after the second electro-optic cell, cubed after the third cell, etc. The enhanced transmission function has a vastly improved rise after the threshold voltage allowing for greater multiplexing capability.

REFERENCES:
patent: 3655269 (1972-04-01), Heilmeier
patent: 3661444 (1972-05-01), Matthies
patent: 3873186 (1975-03-01), Ritchie
patent: 3977767 (1976-08-01), Okuma et al.
patent: 3982239 (1976-09-01), Sherr
patent: 3992082 (1976-11-01), Katz
patent: 4039254 (1977-08-01), Harsch
patent: 4099855 (1978-07-01), Wisbey et al.
patent: 4231640 (1980-11-01), Funada et al.
patent: 4232948 (1980-11-01), Shanks
patent: 4241339 (1980-12-01), Ushiyama
Alt and Pleshko, "Scanning Limitations of Liquid-Crystal Displays", IEEE Transactions on Electron Devices, vol. ED-21, No. 2, Feb. 1974, pp. 146-155.

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