Erasure method for memory-type EL display devices

Details Erasure method for memory-type EL display devices Erasure method for memory-type EL display devices

1979-12-04

1981-11-17

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

3151693, 340805, H05B 3700

Patent

active

043014518

ABSTRACT:
An improved method of completely erasing images stored by memory-type electroluminescent display panels. The method comprises interrupting the a.c. sustaining bias signal normally applied to the panel and impressing an erase pulse that is opposite in polarity to the last-preceding sustaining pulse or cycle. The amplitude and duration of the erase pulse are chosen to effect relaxation of the EL layer's internal field. The sustaining bias signal is then restored to place the panel in an erased, ready-to-write condition.

REFERENCES:
patent: 3975661 (1976-08-01), Kanatan et al.
patent: 4206460 (1980-06-01), Yasuda et al.

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