| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate write delay of data at low gradation level. <P>SOLUTION: A pixel circuit 10 of the present invention includes: a drive transistor Tr5 which supplies a driving current to an organic EL element 12 connected to a current output terminal, a holding capacitor Cr which applies a predetermined voltage corresponding to accumulated charges to a current control terminal of the drive transistor Tr5; and a capacitive element Cs which transmits voltage variation supplied from a variable voltage source V<SB>dd</SB>to the current control terminal through capacitive coupling. The holding capacitor Cr drives the drive transistor Tr5 by applying the predetermined voltage corresponding to the accumulated charges to the current control terminal, and accelerates the supply of the driving current to the organic EL element 12 throughout a light emission period whose time length is predetermined according to gradation display, and the capacitive element Cs, and on the other hand, stops supplying the driving current to the organic EL element 12 by applying the voltage variation output from the variable power source V<SB>dd</SB>to the current control terminal through the capacitive coupling after the light emission period passes. <P>COPYRIGHT: (C)2009,JPO&INPIT |
