| 摘要 |
<p>A liquid crystal display capable of removing D.C. voltage applied to a liquid crystal panel when halftone images are formed by dithering. In a halftone liquid crystal display operated by switching a plurality of sets of reference voltages in an A/D converter for dithering, a phase control signal (20) is provided for controlling the phase of dithering, and a set of reference voltages selected for one polarity of a liquid crystal driving voltage can be switched to other set of reference voltages by changing the logical value of the phase control signal (20). The D.C. voltage applied to the liquid crystal panel is offset by the voltage difference between the polarities of the liquid crystal driving voltage that occurs when data is converted to another data different by one gradation by dithering. The burn on the liquid crystal screen is thus reduced.</p> |
