Back to results
US 5,402,141 AGranted
Multigap liquid crystal color display with reduced image retention and flicker
AssigneeHoneywell Inc.
InventorsElias S. Haim, Tomihisa Sunata
Life of this patent
Estimating the term…
Abstract
A multigap liquid crystal color display having RED, GREEN and BLUE pixels with TFT activating transistors and with the pixels being constructed and arranged so that the offset voltages at the RED, GREEN and BLUE pixels induced by the gate pulses applied to the TFTs are equalized. In one embodiment, the pixel storage capacitors are customized to equalize the offset voltages. In a second embodiment, the pixel areas are adjusted so as to provide the offset voltage equalization.
Claims10
A multigap liquid crystal color display including a common electrode;
- a plurality of pixels, each having a pixel electrode facing a common electrode;
- a plurality of switches for respectively activating said pixel electrodes;
- means for applying an activation signal to each switch, thereby inducing offset voltages at said pixel electrodes;
- said pixels including first and second pixels for generating first and second colors, respectively;
- said first and second pixels having first and second cell gaps, respectively, said first cell gap being different from said second cell gap;
- said first and second pixels exhibiting first and second capacitances, respectively, resulting in first and second offset voltages at pixel electrodes of said first and second pixels, respectively, characterized in that:
- said electrodes of said first and second pixels are constructed and arranged to equalize said first and second offset voltages, thereby establishing an electrode offset voltage at said first and second pixels electrodes;
- and in that it further includes means for providing a source bias voltage, said source bias voltage being applied to said common electrode to minimize said electrode offset voltage.
5 more elements
Dependencies are inferred from the claim text.