Patent ID: 6081307
Filing Date: 2000-06-27
Classification: G02F

Abstract:
A liquid crystal display device having a display portion, said liquid crystal comprising:a plurality of gate lines in said display portion;a plurality of signal lines in said display portion, said plurality of gate lines and plurality of signal lines are arranged perpendicular to each other;a common line provided in a peripheral portion of said display portion; anda static electricity preventing circuit including a first transistor having a floating gate, said first transistor connected between said common line and said one of said plurality of gate lines, and a second transistor having a floating gate, said second transistor connected between said common line and said one of said plurality of signal lines,said first transistor and said second transistor each further including:a first doped semiconductor layer overlapping a first edge portion of said floating gate, anda second doped semiconductor layer, said second doped semiconductor layer overlapping a second edge portion of said floating gate, wherein said first doped semiconductor layer and said first edge portion of said floating gate form a first capacitance therebetween, and wherein said second doped semiconductor layer and said second edge portion of said floating gate form a second capacitance therebetween different from said first capacitance.