Patent ID: 7342410
Filing Date: 2008-03-11
Classification: G09G

Abstract:
1. A display device, comprising: a plurality of first signal lines electrically connected to corresponding pixel circuits, respectively; a plurality of second signal lines electrically connected to the corresponding pixel circuits, respectively; a first main thin-film transistor set having a first main thin-film transistor and a second main thin-film transistor, each of which has a first terminal, a second terminal and a control terminal; a second main thin-film transistor set having another first main thin-film transistor and another second main thin-film transistor, each of which has a first terminal, a second terminal and a control terminal, wherein the first terminals of the first main thin-film transistors are electrically connected to the first signal lines and the first terminals of the second main thin-film transistors are electrically connected to the second signal lines; a test pad for receiving power signals for driving the pixel circuits and outputting voltage levels stored in the pixel circuits; a first auxiliary thin film transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal of the first auxiliary thin film transistor is electrically connected to the second terminals of the first main thin-film transistor set; and a second auxiliary thin film transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal of the second auxiliary thin film transistor is electrically connected to the second terminals of the second main thin-film transistor set, the second terminals of the first auxiliary thin film transistor and the second auxiliary thin film transistor are coupled to the test pad, and the control terminals of the first auxiliary thin film transistor and the second auxiliary thin film transistor are adapted to receive corresponding auxiliary control signals, respectively.