Patent ID: 7768474

Claim:
A driver device for driving a plurality of capacitive light emitting elements by supplying a drive-data-dependent voltage to each of the plurality of capacitive light emitting elements, the driver device comprising: a pixel data pulse generating circuit including a plurality of output buffers associated with the plurality of capacitive light emitting elements respectively, for applying either a predetermined high voltage or low voltage to the respective capacitive light emitting elements in accordance with the drive data, a plurality of power supply switching elements connected with the plurality of output buffers respectively for supplying a power supply voltage with the predetermined high voltage to the associated output buffers respectively, and an external terminal that is commonly connected to each of nodes between the power supply switching elements and the output buffers; and a resonance circuit connected to the external terminal for recovering electrical charge, which has accumulated in the capacitive light emitting elements, via the external terminal and for feeding the recovered electrical charge to the external terminal, wherein the resonance circuit includes a capacitor for recovering the electrical charge accumulated in the capacitive light emitting elements, a first switching element for feeding a first current, which corresponds with the recovered electrical charge, to the external terminal, and a second switching element for accepting a second current, which corresponds with the electrical charge accumulated in the capacitive light emitting elements, via the external terminal and supplying the second current to the capacitor, wherein the second switching element grounds one electrode of the capacitor when the second switching element is in an on state, and wherein when the second switching element is turned on and one electrode of the recovery capacitor is grounded, an accumulated electric charge is introduced to the recovery capacitor, the accumulated electric charge being the electric charge accumulated in the light emitting elements, the power supply switching elements are located in the pixel data pulse generating circuit, each of the plurality of power supply switching elements is directly connected to each of the plurality of output buffers respectively wherein the number of power supply switching elements is the same as the number of output buffers and the output buffers are located in the pixel data pulse generating circuit.