Display apparatus with a display device and method of driving the display device
US7995029B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Dec 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus including a matrix display device with pixels wherein particles move in a fluid between electrodes. An optical state of the pixels is defined by a value of a drive voltage and a duration of a drive period during which the drive voltage is present across the pixel. A DC-balancing circuit controls the amplitudes of the drive voltages and/or durations of drive periods to obtain a substantially zero time-average value across each pixel or across each sub-group of pixels. This control of the amplitude of the drive voltages and/or the duration of the drive periods allows minimizing the image retention, without requiring reset pulses causing all pixels to become temporarily white or black.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.