Driver and electronic device
AssigneeSeiko Epson Corporation
InventorAkira MORITA
Life of this patent
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Abstract
In a display device including a driver that drives load lines in an electro-optical panel through capacitor charge redistribution, load capacitance among the load lines of the electro-optical panel differs depending on parasitic capacitance of a board on which the load lines are mounted, the type of the panel, and so on, and the accuracy of driving voltages drops due to such variations. The driver is provided with a adjusting capacitance group that corrects variation in load capacitance, and by adjusting a driving capacitance on the driver side, a ratio with the load capacitance is increased and accuracy of a post-driving potential is increased.
Claims20
A driver comprising:
- a capacitor driving circuit that outputs first to nth capacitor driving voltages (where n is a natural number of 2 or more) corresponding to tone data to first to nth capacitor driving nodes;
- a capacitor circuit including first to nth capacitors provided between the first to nth capacitor driving nodes and a data voltage output terminal;
- and
- a variable capacitance circuit provided between the data voltage output terminal and a reference voltage node;
- wherein a capacitance of the variable capacitance circuit is set so that a capacitance obtained by adding a capacitance of the variable capacitance circuit and an electro-optical panel-side capacitance is in a prescribed capacitance ratio relationship with a capacitance of the capacitor circuit.
Dependencies are inferred from the claim text.