한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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An Area Efficient 8-bit Current DAC for Current Programming AMOLEDs

  • Lee, B.K. (Div. of Electrical and Computer Engineering, Hanyang University) ;
  • Kang, J.S. (Div. of Electrical and Computer Engineering, Hanyang University) ;
  • Lee, J.K. (Div. of Electrical and Computer Engineering, Hanyang University) ;
  • Han, J.U. (Div. of Electrical and Computer Engineering, Hanyang University) ;
  • Kwon, O.K. (Div. of Electrical and Computer Engineering, Hanyang University)
  • Published : 2006.08.22
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Abstract

This paper presents an area efficient 8-bit current digital to analog convector (DAC) which is applied to 240 channels Active Matrix - Organic Light Emitting Diode (AMOLED) data driver. The proposed circuit constitutes 4-bit binary weighted current DAC and 4-bit switched capacitor cyclic DAC. The proposed DAC has about 70% smaller area than that of the typical binary weighted current DAC. We overcome sampling time by reducing the number of repetition phases so that it can display 8-bit gray scale image.

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