| 摘要 |
PURPOSE: A driving circuit of a liquid crystal display device is provided to realize a DC/DC converting part with a single chip, thereby maximizing the efficiency of a space and easily design the product. CONSTITUTION: A DC/DC converting part(100) is formed of a modulating part(101) modulating pulse width or pulse frequency of external power voltage, a protective circuit part(103) stabilizing the external power voltage, and an input and output condition adjusting part(110) controlling each inner power voltage of a liquid crystal display device. A dip switch(200) is electrically connected with the input and output condition adjusting part of the DC/DC converting part for selectively generating the inner power voltages.
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