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Driving circuit of liquid crystal display device

  • US 7,221,346 B2
  • Filed: 11/13/2003
  • Issued: 05/22/2007
  • Est. Priority Date: 05/23/2003
  • Status: Expired due to Fees
First Claim
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1. A driving circuit of a liquid crystal display device comprising:

  • a timing controller outputting a polarity-inverting signal and at least one digital signal;

    a source driver;

    a low color scale driving circuit, wherein the low color scale driving circuit generates at least one analog signal and comprises;

    at least one buffer, receiving the polarity-inverting signal and said at least one digital signal outputted from the timing controller; and

    at least one set of transistors, coupled to an output terminal of the buffer for outputting said analog signal, wherein said set of transistors comprises a PMOS transistor and a NMOS transistor, a gate of the PMOS transistor and a gate of the NMOS transistor coupled to the output terminal of the buffer, a source of the PMOS transistor coupled to the drain of the NMOS transistor, a drain of the PMOS transistor coupled to a power voltage, a source of the NMOS transistor coupled to a ground voltage, the analog signal outputted through the source of the PMOS transistor and the drain of the NMOS transistor.

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