| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a display device capable of maintaining a drain voltage of an output transistor which functions as a constant current source even during a sampling term of other circuits constant, suppressing the change due to gate voltage leakage of the output transistor, obtaining a uniform current source without current value variations of the output step and displaying high quality picture producing no uneven luminance toward the scan end part. <P>SOLUTION: A current sample-and-hold circuit 1031-1 in which, for example, the sample-and-hold is completed actuates a leakage eliminating circuit and allows a constant current corresponding to the current Iin sampled by a TFT 125-1 to flow through a node ND121-1, in a term when the sample-and-hold of own stage is completed and the sample-and-hold of another stage is operated. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
