Single substrate ac plasma display
US4106009A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Jan 17, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J11/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It has been discovered that the electric field created at an ON site of a planar ac plasma display device in response to the combined sustain and wall voltages propagates along the cathodic electrode during each half cycle of the sustain signal. This means that the electrodes can be made to extend much farther away from the interelectrode gap than was heretofore believed, providing glow paths which extend farther away from the interelectrode gap than have been heretofore provided. Illustrative display devices taking advantage of this discovery include a seven-segment display in which each segment comprises a central electrode and two outer electrodes, and fixed-format displays in which each electrode is formed in the shape of an alphabetic character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.