Method of eliminating gas bubbles in an electrophoretic display
US4889603A · kind A · utility
72Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1679
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.