An area-efficient output driving scheme using a DAC sharing method for AMLCD column drivers

Seungchul Jung, Yong Joon Jeon, Jin Yong Jeon, Hyung Min Lee, Gyu Hyeong Cho, Young Suk Son

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A novel output driving scheme is proposed to reduce the active matrix liquid crystal display (AMLCD) driver size, especially, the digital-to-analog converter (DAC) size. In this scheme, two channels share one DAC, and the effective area of the DAC in a column driver is reduced by half. Both two column drivers write their data simultaneously; the writing time can be almost the same as one horizontal time, not half. The offset voltage of the operational amplifier is averaged in 2 frames. A simulation is performed with Cadence SPECTRE™a 0.35-μOS process. The simulated integral nonlinearity (INL) result is less than ±0.11 LSB, and differential nonlinearity (DNL) is less than ±0.014 LSB with 10-bit color depth.

Original languageEnglish
Pages (from-to)2002-2005
Number of pages4
JournalJournal of the Korean Physical Society
Issue number5 PART 1
Publication statusPublished - 2009 Nov 1
Externally publishedYes



  • DAC size
  • Display driver IC
  • Electronic circuits
  • Output driver

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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