JSTS:Journal of Semiconductor Technology and Science

The Institute of Electronics and Information Engineers (대한전자공학회)
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Dynamic Slew-Rate Control for High Uniformity and Low Power in LCD Driver ICs

  • Choi, Sung-Pil (College of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lee, Mira (Display Solution Development, SAMSUNG Electronics) ;
  • Jin, Jahoon (College of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kwon, Kee-Won (College of Information and Communication Engineering, Sungkyunkwan University) ;
  • Chun, Jung-Hoon (College of Information and Communication Engineering, Sungkyunkwan University)
  • Received : 2014.08.02
  • Accepted : 2014.08.16
  • Published : 2014.10.30
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Abstract

A slew-rate control method of LCD driver ICs is introduced to increase uniformity between adjacent driver ICs and reduce power consumption. The slew rate of every voltage follower is calibrated by a feedback algorithm during the non-displaying period. Under normal operation mode, the slew rate is dynamically controlled for improving power efficiency. Experimental results show that the power consumption is reduced by 16% with a white pattern and by 10% with a black pattern, and display defects are successfully eliminated.

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References

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