Claims
- 1. An improved method of operating a PALC panel which comprises a channel member defining at least one channel, an ionizable gas in the channel, channel electrodes exposed to the ionizable gas in the channel, a cover sheet over the channel, a data drive electrode in crossing relationship with the channel, and a layer of electro-optic material between the data drive electrode and the cover sheet, wherein the voltage between the channel electrodes is increased to a firing voltage to create a plasma in the channel, the voltage between the channel electrodes is reduced to a sustaining voltage to sustain the plasma for an interval during which a selected drive voltage is applied to the data drive electrode to establish an electric field in the layer of electro-optic material, and the voltage between the channel electrodes is reduced to a level that is insufficient to sustain the plasma, and the improvement comprises maintaining a residual bias voltage between the channel electrodes after reducing the voltage to a level insufficient to sustain the plasma, whereby an electric field having a component parallel to the cover sheet is created in the layer of electro-optic material.
- 2. An improved PALC panel of the kind comprising a channel member defining at least one channel, an ionizable gas in the channel, channel electrodes exposed to the ionizable gas in the channel, a cover sheet over the channel, a data drive electrode in crossing relationship with the channel, a layer of electro-optic material between the data drive electrode and the cover sheet, and a channel electrode driver which increases the voltage between the channel electrodes to a firing voltage to create a plasma in the channel, reduces the voltage between the channel electrodes to a sustaining voltage to sustain the plasma for an interval during which a selected drive voltage is applied to the data drive electrode to establish an electric field in the layer of electro-optic material, and reduces the voltage between the channel electrodes to a level that is insufficient to sustain the plasma, wherein the improvement resides in that the channel electrode driver maintains a residual bias voltage between the channel electrodes after reducing the voltage to a level insufficient to sustain the plasma, whereby an electric field having a component parallel to the cover sheet is created in the layer of electro-optic material.
CROSS REFERENCED TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 60/091,723, filed Jul. 6, 1998.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5210469 |
Kim |
May 1993 |
A |
5948228 |
Hinchliffe et al. |
Sep 1999 |
A |
6016032 |
Buzak et al. |
Jan 2000 |
A |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/091723 |
Jul 1998 |
US |