Electrophoretic display with single character erasure
US5223115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0209
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A triode type electrophoretic display includes a pair of substantially identical glass faceplates sealed against a peripheral sealing wall to form a fluid-tight envelope for containing an electrophoretic fluid. A first faceplate bears the anode which is composed of a plurality of elongated substantially parallel horizontal conductor members disposed within a first plane and a plurality of elongated substantially parallel vertical conductor members. The horizontal and vertical members are insulated from each other by interstitial insulator strips underlying the vertical members and by a SiO.sub.2 layer. The vertical and horizontal members are slotted and grouped into groups so that the area of the intersection of a vertical group and a horizontal group approximates that of a single character. The cathode and grid are formed on the other faceplate in essentially the same manner as the composite anode. By placing the proper voltages on the horizontal and vertical elements of the anode, selective characters may be erased from the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.