Driving circuit and driving method for liquid crystal display panel
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United States of America Patent
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May 25, 2010
Grant Date -
May 31, 2007
app pub date -
Nov 20, 2006
filing date -
Nov 28, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A driving circuit for a LCD (Liquid Crystal Display) panel is provided which is capable of performing overdriving operations in all shades of gray and of obviating the necessity of predetermining a driving pattern based on experimental results. The driving circuit for the LCD panel includes an operational amplifier to a non-inverted input terminal of which a voltage to charge a pixel for current gray level display is applied and to an inverted input of which a voltage for charging a corresponding pixel occurred one field before, a NAND circuit to detect an output state of operational amplifiers, a P-channel MOSFET (Metal Oxide Semiconductor Field Effect Transistor) to switch operational states from one state in which the operational amplifier operates as a comparator to perform overdriving operations using source voltages to one state in which a pixel to be charged using a gray level voltage.
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