| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that an EL element is deteriorated in accordance with a cumulative amount (current×time) of current and its luminance is lowered, and, when the EL element is used as a display element, display happens to be viewed as an image persistence phenomenon because the cumulative amount (current×time) of current differs by pixel. <P>SOLUTION: A drive circuit for a light emitting element includes: a drive transistor; a capacitance connected between the gate and the source of the drive transistor; a resistance element and a first switch provided in series between the drain of the drive transistor and an input terminal; a second switch connecting the gate of the drive transistor and the terminal of the resistance element far from the drive transistor in a period when the first switch is closed; and a third switch provided on the path of drive current where the drain current of the drive transistor flows from an output terminal to the light emitting element, wherein the resistance element is an element whose resistance value is increased in accordance with the cumulative amount of current. <P>COPYRIGHT: (C)2009,JPO&INPIT |
