Driver for charge compensation, electro-optical device and electronic apparatus using thereof

A driver comprising:

• a data voltage output terminal electrically coupled to a data line through a data line switch of an electro-optical panel;
• a capacitor driving circuit configured to output first to nth capacitor driving voltages corresponding to gradation data to first to nth capacitor driving nodes, n being an integer of 2 or greater;
• a capacitor circuit including first to nth capacitors provided between an output node that is a node of the data voltage output terminal and the first to nth capacitor driving nodes;
• a processing circuit configured to calculate an excess/deficient charge amount, the excess/deficient charge amount being a deficient charge amount or an excess charge amount of the output node when the data line switch is turned on;
• and
• a charge compensation circuit including a charge compensation capacitor circuit and configured to inject into the output node or discharge from the output node a compensation charge based on the excess/deficient charge amount calculated by the processing circuit, by using the charge compensation capacitor circuit,
• wherein in a case where a voltage of the data line when the data line switch is off is a precharge voltage, the processing circuit calculates the excess/deficient charge amount that is generated by a difference between the precharge voltage and a target voltage corresponding to the gradation data when the data line switch is turned on from an off state,
• the processing circuit calculates the excess/deficient gradation value by DCC_DQ=(DQ_GD−DPRE)×Coef, where a gradation value corresponding to the target voltage is DQ_GD, a gradation value corresponding to the precharge voltage is DPRE, a coefficient representing a ratio of the excess/deficient charge amount with respect to the difference between the target voltage and the precharge voltage is Coef, and an excess/deficient gradation value that compensates for the excess/deficient charge amount is DCC_DQ, and
• the charge compensation circuit injects to the output node or discharges from the output node the compensation charge based on the excess/deficient gradation value.