Apparatus and methods for pulsing the electrodes of an electroph

Details Apparatus and methods for pulsing the electrodes of an electroph Apparatus and methods for pulsing the electrodes of an electroph

1988-10-03

1990-08-07

Oberley, Alvin

Communications: electrical

Land vehicle alarms or indicators

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

340805, 350362, G09G 300

Patent

active

049471570

ABSTRACT:
There is described a method and apparatus for driving an electrophoretic display during a writing mode. During this mode the cathodes that are not being written into are pulsed in regard to the pulsing of a grid that is being written into. The grid that is being written into is associated with a cathode line which line is caused to assume a writing mode for a longer duration than the pulse applied to the writing grid. At the same time cathode lines which are not being written into are pulsed for a time duration equivalent to the time duration of the writing grid pulse. By pulsing the electrodes in the manner described above, one increases the writing speed of the electrophoretic display while maintaining a bright uniform background for the display.

REFERENCES:
patent: 4041481 (1977-08-01), Sato
patent: 4203106 (1980-05-01), Dalisa
patent: 4655897 (1987-04-01), DiSauto et al.
patent: 4732830 (1988-03-01), Di Santo et al.
patent: 4746917 (1988-05-01), Di Santo et al.

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