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US 2007/0164962 A1Published application
Pixel circuit, active matrix apparatus and display apparatus
AssigneeSony Corporation
InventorsKatsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
Life of this patent
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Abstract
A pixel circuit having a function of compensating for characteristic variation of an electro-optical element and threshold voltage variation of a transistor is formed from a reduced number of component elements. An input signal is sampled from a signal line so as to be held in a holding capacitor. The threshold voltage of the drive transistor is imparted to the holding capacitor in order to cancel an influence of the threshold voltage.
Claims2
A pixel circuit disposed at intersection of a scanning line and a signal line, the pixel circuit comprising:
- an electro-optical element;
- a holding capacitor;
- and
- a drive transistor,
- wherein an input signal from said signal line is sampled into said holding capacitor, and
- said drive transistor applies current to said electro-optical element depending on the input signal held by said holding capacitor, said drive transistor having a threshold voltage that is imparted to said holding capacitor in association with the input signal being sampled into said holding capacitor.
3 more elements
Dependencies are inferred from the claim text.