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MULTI-GRADATION DRIVE CIRCUIT, DRIVING METHOD, AND DISPLAY DEVICE OF CHOLESTERIC LIQUID CRYSTAL PANEL

  • US 20100328369A1
  • Filed: 09/10/2010
  • Published: 12/30/2010
  • Est. Priority Date: 03/28/2008
  • Status: Abandoned Application
First Claim
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1. A multi-gradation drive circuit that drives a cholesteric liquid crystal panel in a plurality of drive phases in different drive cycles, comprising:

  • a current upper limit control circuit configured to calculate an upper limit of a supply current of a liquid crystal drive power source and outputs an upper limit control signal; and

    a supply current limiting circuit configured to limit the supply current of the liquid crystal drive power source to the upper limit value or less specified by the upper limit control signal, whereinthe current upper limit control circuit switches the upper limit control signal to another in accordance with the drive cycle in each drive phase.

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