Patent ID: 7656380

Claim:
A display device comprising: a pixel portion; and a source signal line driving circuit comprising: a first unit comprising: a plurality of first latch circuits; a plurality of first stages of a shift register which output pulses in accordance with clock signals, wherein the pulses decide timing of latching of the plurality of first latch circuits; a plurality of first level shifters for executing level conversion of signals inputted into the plurality of first latch circuits; and a first current source for controlling supply of current to the plurality of first level shifters; and a second unit comprising: a plurality of second latch circuits; a plurality of second stages of the shift register which output pulses in accordance with the clock signals, wherein the pulses decide timing of latching of the plurality of second latch circuits; and a plurality of second level shifters for executing level conversion of signals inputted into the plurality of second latch circuits; a second current source for controlling supply of current to the plurality of second level shifters, wherein the first current source is configured to stop supply of currents to the plurality of first level shifters while the plurality of second stages of the shift register output the pulses, and wherein the second current source is configured to stop supply of currents to the plurality of second level shifters while the plurality of first stages of the shift register output the pulses.