Patents Examined by Tom F Thomas
  • Electronic device
    Patent number: 6670637
    Abstract: To provide an electronic device capable of bright image display. A pixel is structured such that a switching TFT and a current controlling TFT are formed on a substrate and an EL element is electrically connected to the current controlling TFT. A gate capacitor formed between a gate electrode of the current controlling TFT and an LDD region thereof holds a voltage applied to the gate electrode, and hence a capacitor (condenser) is not particularly necessary in the pixel, thereby making the effective light emission area of the pixel large.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: December 30, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Jun Koyama, Kazutaka Inukai, Mayumi Mizukami