Electrophoretic display panel having enhanced operation
US5250938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Oct 13, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A triode-type electrophoretic display includes a glass viewing window upon which has been deposited a plurality of parallel cathode members. A plurality of grid members are deposited upon a layer of insulation above the cathode members and perpendicular thereto. A fluid-tight envelope encapsulating the cathode and grid members is formed by a glass cap having an conductor layer deposited on an interior surface for forming an anode. The glass cap seals against the viewing window. An electrophoretic fluid having pigmented particles suspended therein is contained in the envelope. The cathode and grid members have no free terminal ends within the fluid, instead, such ends extend beyond the fluid containing space and are covered by the cap. The cathode, grid and anode are selectively electrically chargeable to induce movement of the particles within the fluid, localized concentrations of particles at the intersections of the cathode and grid being visible through the viewing window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.