Patent ID: 7394102
Filing Date: 2008-07-01
Classification: G09G,G11C,H01L,H03K

Abstract:
1. A display device comprising: first, second and third thin film transistors, each having a gate electrode, a first electrode and a second electrode, and the second electrode of the first thin film transistor electrically connected to the gate electrode of the second thin film transistor; a first signal input portion electrically connected to the gate electrodes of the first and third thin film transistors; an input change circuit electrically connected to the first electrode of the first thin film transistor; second and third signal input portions electrically connected to the input change circuit; a fourth signal input portion electrically connected to the first electrode of the second thin film transistor; a power supply electrically connected to the first electrode of the third thin film transistor; and a signal output portion electrically connected to the second electrodes of the second and third thin film transistors, wherein the first, second and third thin film transistors are the same conductivity type.