Patent ID: 8614728

Claim:
A driver device to drive light emission elements arranged in a branch connection to a common terminal, comprising: a scan-circuit portion including scan circuits that are connected to one another in a cascade manner and include output terminals connected to the light emission elements on a one-to-one basis, wherein a first-clock terminal, from which to output a first clock signal, is connected to odd-numbered scan circuits, and a second-clock terminal, from which to output a second clock signal, is connected to even-numbered scan circuits, and wherein the scan circuit portion is configured to scan and drive the light emission elements sequentially from a first scan circuit to a last scan circuit once the second-clock signal is applied to the first scan circuit; a data-drive portion configured to drive the common terminal; a clock-driver circuit including a first output terminal from which to output a first-clock pulse, a second output terminal from which to output a second-clock pulse that is different in phase from the first-clock pulse, and a third output terminal from which to output a third-clock pulse synchronized with both the first-clock pulse and the second-clock pulse; and a waveform-shaper circuit including a first resister having one end connected to a node and the other end connected to a point between the first output terminal and the first-clock terminal, a second resistor having one end connected to the node and the other end connected to a point between the second output terminal and the second-clock terminal, a capacitor having one end connected to the third output terminal and the other end connected to the node, the waveform-shaper circuit configured to re-shape a waveform of the first clock signal to be outputted to the first-clock terminal and a waveform of the second clock signal to be outputted to the second-clock terminal.