Patent ID: 8125506

Claim:
An electro-optical device comprising: a potential generating circuit that generates a first power supply potential and a second power supply potential that is different from the first power supply potential; a first signal processing circuit that selectively outputs one of a first high potential and a first low potential according to a data signal at one of at least three levels; a second signal processing circuit that selectively outputs one of a second high potential that is different from the first high potential and a second low potential that is different from the first low potential according to the data signal; a first current source that generates a first current in accordance with an output of the first signal processing circuit and the first power supply potential; a second current source that generates a second current in accordance with an output of the second signal processing circuit and the second power supply potential; a control unit that is configured to control the first current source and the second current source such that the second current source generates the second current for a period with a duration that is different than a duration of a period during which the first current is generated; and an electro-optical element that provides a tone level according to the first current and the second current.