Chang-Dong Kim

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Juhn Suk Yoo Hojin Lee Jerzy Kanicki Chang-Dong Kim In-Jae Chung Abstract — A novel pixel circuit for electrically stable AMOLEDs with an a-Si:H TFT backplane and top-anode organic light-emitting diode is reported. The proposed pixel circuit is composed of five a-Si:H TFTs, and it does not require any complicated drive ICs. The OLED current compensation for(More)
We proposed the amorphous silicon thin-film transistor (a-Si:H TFT) pixel electrode circuit with current-scaling function that can be used for active-matrix organic light-emitting displays (AM-OLEDs). In contrast to the conventional current-mirror circuit, this circuit with cascaded storage capacitors can provide a high data-to-OLED current ratio without(More)
Inverted stagger hydrogenated-amorphous-silicon (a-Si:H) Corbino thin-film transistors (TFTs) were fabricated with a five-photomask process used in the processing of the activematrix liquid-crystal displays (AM-LCD). We show that the a-Si:H Corbino TFT has the asymmetric electrical characteristics under different drain-bias conditions. To accommodate for(More)
We proposed the hydrogenated amorphous silicon thin-film transistor (a-Si:H TFT) pixel electrode circuit with current-scaling function which is suitable for active-matrix organic light-emitting displays (AM-OLEDs). In contrast to the conventional current-mirror circuit, this circuit with the cascaded storage capacitors can provide a high data-to-organic(More)
Abstract: This paper reports a new pixel circuit suitable for enhancing the reliability of AM-OLED with the a-Si:H TFT backplane and top-anode OLED structure. The propose pixel circuit is composed of 5 a-Si:H TFTs for switching and driving device, and it does not require any complicated drive ICs. The compensation of OLED current against threshold voltage(More)
By the integrated drive circuitry with laser crystallization process, the gate and data driver circuits required for full color WVGA(800 · RGB · 480) LCD are integrated on panel. The integrated driver comprises a sequential analog sampling data driver and a dual logic gate scanner for redundancy. The characteristics and uniformities of the LTPS (low(More)
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