Patent ID: 6476788
Filing Date: 2002-11-05
Classification: G02F,G09G,H01L

Abstract:
An image display device comprising:a plurality of pixels arranged in a matrix, said plurality of pixels each being provided with a pixel switching means, a pixel electrode coupled with said pixel switching means for applying an electric field to a material producing an electro-optical effect; a common electrode for cooperating with said pixel electrode in driving said material producing an electro-optical effect; a plurality of gate lines each extending in parallel with each other and connected to a corresponding row of said pixel switching means for selecting said corresponding row of said pixel switching means in a predetermined order; a gate line driver circuit for driving said plurality of gate lines; a plurality of signal lines extending in such a manner as to intersect said plurality of gate lines for supplying display signal voltages to said pixel electrodes via selected ones of said pixel switching means; and a display signal voltage applying circuit for applying said display signal voltages to respective ones of said plurality of signal lines, wherein said pixel switching means each is comprised of a poly-Si TFT of a first type structure, said display signal voltage applying circuit contains a plurality of poly-Si TFTs of a second type structure, a gate of each of said poly-Si TFTs of the first type structure is disposed to oppose a first side of a first poly-Si thin film for forming a channel of said poly-Si TFT of the first type structure with a first gate insulating film interposed therebetween and is connected to a corresponding one of said plurality of gate lines, a gate of each of said plurality of poly-Si TFTs of the second type structure is disposed to oppose a first side of a second poly-Si thin film for forming a channel of each of said plurality of poly-Si TFTs of the second type structure with a second gate insulating film interposed therebetween, sources and drains of said poly-Si TFTs of the first and second type structures are disposed approximately in a same plane on a same substrate of said image display device, and said first side of said first poly-Si thin film and said first side of said second poly-Si thin film are on opposite sides of said same plane from each other.