Method of eliminating gas bubbles in an electrophoretic display

Details Method of eliminating gas bubbles in an electrophoretic display Method of eliminating gas bubbles in an electrophoretic display

1988-12-09

1989-12-26

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204299R, 340787, G09G 334, G02F 100

Patent

active

048896039

ABSTRACT:
There is disclosed a method which minimizes bubble growth during electrophoretic cell operation. The method involves exposing the electrophoretic suspension to an ultrasonic probe at a given frequency and amplitude and for a suitable time period just prior to pouring the suspension into the electrophoretic display. Exposure to the ultrasonic probe minimizes bubble growth during actual cell operation as the probe operates to drive out a significant amount of gas contained in the suspension while further affecting the pigment particle characteristics.

REFERENCES:
patent: 3668106 (1972-06-01), Ota
patent: 3674475 (1972-07-01), Silverberg
patent: 4285801 (1981-08-01), Chiang
patent: 4298448 (1981-11-01), Muller et al.

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