Drive system for a thin-film EL display panel
US4237456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1977 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jul 26, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0275
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A drive system is provided for a thin-film EL display panel which includes an EL thin layer sandwiched between a pair of dielectric layers, a plurality of scanning line electrodes formed on one of the dielectric layers, and a plurality of data line electrodes formed on the other of the dielectric layers. The scanning line electrodes and the data line electrodes, in combination, define a matrix pattern. A selected data line is preliminarily charged to a predetermined level below the threshold level of electroluminescence. Thereafter, a selected scanning line is connected to receive a write-in pulse, of which the level is also below the threshold level of electroluminescence. A picture point at which the selected data line and the selected scanning line cross each other receives a voltage of the preliminary charge superimposed on the write-in pulse and having a value exceeding the threshold level, thereby providing electroluminescence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.