Patent ID: 8004513

Claim:
A display comprising: a pixel portion; m signal lines S 1 , S 2 , . . . , and S m ; a plurality of scanning lines extending across said m signal lines on the pixel portion; a current source circuit including i current sources C 1 , C 2 , . . . , and C i ; and a switching circuit comprising n switching units U 1 , U 2 , . . . , and U n , wherein one of the signal lines is connectable to at least three of the current sources through one of the switching units, but electrically connected to only one of said at least three of the current sources at a time, wherein at least a first signal line and a second signal line of the m signal lines are connectable to at least a same one of the current sources, and wherein the first signal line is connectable to at least one current source to which the second signal line is not connectable.