Discharge voltage control for plasma addressed display device
US5889502A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3662
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a plasma addressed display device which can adaptively control a voltage to be applied to each discharge channel, thereby suppressing an excess applied voltage. The plasma addressed display device includes a flat panel as a display. The flat panel has a laminated structure consisting of a plasma cell having a plurality of rows of discharge channels and a display cell having a plurality of columns of signal electrodes. A drive circuit sequentially supplies an applied voltage to a cathode in each discharge channel to generate a plasma discharge, thereby performing line-sequential scanning. A signal circuit supplies an image signal to each signal electrode in synchronism with the line-sequential scanning. A constant-current circuit operates so that a constant discharge current flows after the generation of the plasma discharge in each discharge channel. A detecting circuit samples a discharge voltage during flowing of the constant discharge current in each discharge channel. A control circuit adaptively controls the applied voltage to be supplied to each discharge channel according to the sampled discharge voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.