Liquid crystal driving circuit

A liquid crystal driving circuit, comprising:

• a common-signal output circuit configured to supply common signals to common electrodes of a liquid crystal panel and configured to have one or more common nodes whose impedances can be changed, each of the common signals being at a first potential, a second potential, or one or more intermediate potentials in a predetermined order, wherein
• the common-signal output circuit includes first and second switch circuits each configured to output the common signals being at a potential selected from the first potential, the second potential, or the one or more intermediate potentials;
• the first and second switch circuits are connected in parallel;
• an output impedance of the first switch circuit is lower than an output impedance of the second switch circuit;
• a segment-signal output circuit configured to supply segment signals to segment electrodes of the liquid crystal panel and configured to have one or more segment nodes whose impedances can be changed and configured, each of the segment signals being at the first potential, the second potential, or the one or more intermediate potentials in accordance with the common signals, wherein the segment-signal output circuit includes third and fourth switch circuits each configured to output the segment signals being at a potential selected from the first potential, the second potential, or the one or more intermediate potentials;
• the third and fourth switch circuits are connected in parallel;
• an output impedance of the third switch circuit is lower than an output impedance of the fourth switch circuit;
• wherein
• the common-signal output circuit and the segment-signal output circuit are further configured to increase impedances of the common node and the segment node, respectively, in response to first and second edge detection signals, respectively, and wherein the common-signal output circuit is further configured to increase impedances of the common nodes in response to falling edges of the first edge detection signal.