| 摘要 |
<p>The invention concerns an active matrix LCD with subpixels, where a polarity inversion scheme is applied, such as every two rows and one column. Column drivers receive as input digital image signals and comprise a D/A converter that selects among voltages generated by a reference potential generation circuit having positive and negative power supplies and resistor ladder. A problem exists in that parasitic capacitances between neighbouring subpixels have a coupling effect that causes alterations of the applied voltages, which results in e.g. appearance of stripes in image portions that should appear uniform instead. In the present invention, such problem is solved by the addition of suitable positive and negative correction voltages to the positive and negative power supply voltages of the reference potential generation circuit. Such correction voltages are selected such to compensate the alterations to pixel voltages caused by said parasitic capacitances.</p> |
