| US 7,580,015 B2 | ||
| Active matrix organic light emitting diodes pixel circuit | ||
| Ya-Hsiang Tai, Hsin-Chu (Taiwan); and Cheng-Chiu Pai, Chang-Hua Hsien (Taiwan) | ||
| Assigned to TPO Displays Corp., (Taiwan) | ||
| Filed on Feb. 24, 2006, as Appl. No. 11/361,634. | ||
| Claims priority of application No. 94128425 A (TW), filed on Aug. 19, 2005. | ||
| Prior Publication US 2007/0040769 A1, Feb. 22, 2007 | ||
| Int. Cl. G09G 3/32 (2006.01) | ||
| U.S. Cl. 345—82 [345/76; 345/55; 345/204] | 6 Claims |
| 1. A pixel circuit of an active-matrix organic light-emitting diode comprising:
a first switching transistor comprising a first electrode coupled to a data line, a second electrode coupled to a first scan
line, and a third electrode;
a second switching transistor comprising a first electrode coupled to the data line, a second electrode coupled to a second
scan line, and a third electrode;
a third switching transistor comprising a first electrode coupled to the third electrode of the second switching transistor,
a second electrode coupled to the first scan line, and a third electrode;
a driving transistor comprising a first electrode coupled to a first voltage, a second electrode coupled to the third electrode
of the first switching transistor, and a third electrode coupled to third electrode of the third switching transistor;
a first capacitor comprising one end coupled to the first electrode of the driving transistor and the third electrode of the
second switching transistor, and the other end coupled to the first electrode of the third switching transistor;
a second capacitor comprising one end coupled to the third electrode of the first switching transistor and the second electrode
of the driving transistor, and the other end coupled to the third electrode of the second switching transistor and the first
electrode of the third switching transistor; and
a fourth switching transistor comprising a first electrode coupled to the third electrode of the third switching transistor
and the third electrode of the driving transistor, a second electrode coupled to the first scan line, and a third electrode
coupled to an organic light-emitting diode.
|