Patent ID: 8227808
Filing Date: 2012-07-24
Classification: G09G,H01L

Abstract:
1. An organic light emitting diode (OLED) display, having a peripheral circuit and a display area, said display area including a plurality of sub-pixels, each sub-pixel having a light emitting element, said OLED display comprising: a substrate having a first region and a second region; first thin film transistors (TFTs) formed on said first region of said substrate, each first TFT comprising a first buffer layer formed on said substrate, an active area formed by a first poly-silicon layer provided on said first buffer layer, a first gate insulation layer covering said active region and a first gate provided on said first gate insulation layer; and a second TFT formed on said second region of said substrate, said second TFT comprising a second buffer layer formed on said substrate, an active area formed by a second poly-silicon layer provided on said second buffer layer, a second gate insulation layer covering said active area and a second gate provided on said second gate insulation layer, wherein said first poly-silicon layer and said second poly-silicon layer have different grain properties, and said first gate insulation layer and said second gate insulation layer have different thicknesses.