Patent ID: 6304238
Filing Date: 2001-10-16
Classification: G09G

Abstract:
A driving apparatus of a plasma addressed liquid crystal display apparatus with a first transparent scanning electrode group arranged on a first surface of a liquid crystal display apparatus, and a second scanning electrode group opposing a second surface of the liquid crystal display apparatus and forming a plurality of plasma discharge channels arranged perpendicular to the first scanning electrode group,the driving apparatus of the plasma addressed liquid crystal display apparatus comprising:a reference voltage selection digital-to-analog converter for applying a driving voltage to the first scanning electrode group;common anode inversion driving voltage generating means for applying a common anode inversion driving voltage, obtained by inverting the driving voltage, to the second scanning electrode group; andcontrast reduction adjusting means for simultaneously tracking a voltage on a low voltage circuit when a reference voltage is not inverted in the reference voltage selection digital-to-analog converter and a power-supply voltage on a high voltage circuit at a time of inverting the driving voltage and adjusting the voltage on the low voltage circuit and the power-supply voltage to adjust a picture contrast.