Patent ID: 7764279

Claim:
A pixel circuit for driving a plurality of pixel units on a panel of a display, the pixel circuit comprising: a plurality of scanning lines, disposed on the panel of the display, for transmitting scanning signals to the pixel units; a plurality of data lines, disposed on the panel of the display and transversely crossing the scanning lines, for transmitting data signals to the pixel units; a plurality of driving transistors; and a plurality of dual gate lightly doped drain thin film transistors (LDD-TFTs), each being coupled to a corresponding scanning line, a corresponding data line and a corresponding driving transistor, each dual gate LDD-TFT including a first gate, a second gate, a first lightly doped drain having a first length, a second lightly doped drain having a second length, a third lightly doped drain having a third length, and a fourth lightly doped drain having a fourth length, the first gate being cooperated with the first and second lightly doped drains, the second gate being cooperated with the third and fourth lightly doped drains, wherein the first lightly doped drain is the longest in length among the four lightly doped drains and is the one closest to the driving transistor, a heavily doped region is formed in between the second lightly doped drain and the third lightly doped drain, and the first gate and the second gate are formed and patterned by a same single layer.