| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress variation in current value caused by variation in threshold voltage of a transistor, and to provide a display device with a high duty ratio and less deviation from luminance designated by a video signal. <P>SOLUTION: A display device includes a load, a transistor controlling the value of current supplied to the load, a holding capacitor, a first wire, a second wire, and first to fourth switches. After the threshold voltage of the transistor is held in the holding capacitor, potential that corresponds to a video signal is input to allow the voltage obtained by adding the potential to the threshold voltage to be held. This can suppress the variation of the current value caused by the variation in threshold voltage of the transistor. Thus, desired current can be supplied to the load typified by a light-emitting element. Moreover, the display device can have a high duty ratio. <P>COPYRIGHT: (C)2013,JPO&INPIT |
