Chin. J. Semicond. > 2007, Volume 28 > Issue 3 > 385-392

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Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC

Gao Wu, Wei Tingcun and Gao Deyuan

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Abstract: A two-stage driving circuit of a one-chip TFT-LCD driver IC for portable electronic devices is proposed.The driving buffers of the new circuit are built in the γ-correction circuit rather than in the source driver.The power consumption,die area,and driving capability of the driving circuit are discussed in detail.For a two-stage driving circuit with 13 driving buffers,the settling time of the driving voltage within 0.2% error is about 19.2μs when 396 pixel-loads are driven by the same grayscale voltage.The quiescent current of the whole driving circuit is 518μA,and the power consumption can be reduced by 77%.The proposed driving circuit is successfully applied in a 132RGB×176-dot,260k color one-chip driver IC developed by us for the TFT-LCD of mobile phone,and it can also be used in other portable electronic devices, such as PDAs and digital cameras.

Key words: TFT-LCDsource driverγ-correctiongrayscale voltage

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    Received: 18 August 2015 Revised: 17 October 2006 Online: Published: 01 March 2007

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      Gao Wu, Wei Tingcun, Gao Deyuan. Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC[J]. Journal of Semiconductors, 2007, In Press. Gao W, Wei T C, Gao D Y. Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC[J]. Chin. J. Semicond., 2007, 28(3): 385.Export: BibTex EndNote
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      Gao Wu, Wei Tingcun, Gao Deyuan. Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC[J]. Journal of Semiconductors, 2007, In Press.

      Gao W, Wei T C, Gao D Y. Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC[J]. Chin. J. Semicond., 2007, 28(3): 385.
      Export: BibTex EndNote

      Two-Stage Driving Circuit for One-Chip TFT-LCD Driver IC

      • Received Date: 2015-08-18
      • Accepted Date: 2006-08-25
      • Revised Date: 2006-10-17
      • Published Date: 2007-03-06

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