Patent ID: 6987500
Filing Date: 2006-01-17
Classification: G09G

Abstract:
1. A signal correcting circuit for a liquid crystal display, comprising: a polarity determining section for determining from an input signal whether a voltage applied to a liquid crystal has a positive polarity or a negative polarity; a sign appending section for appending a positive or negative signal to said input signal in accordance with a decision made by said polarity determining section; a frame memory; a first multiplier for multiplying data stored in said frame memory by a first constant; a first adder for adding a signal to which said positive or negative sign is appended by said sign appending section to an output signal from said first multiplier and outputting a resultant signal to said frame memory; a second multiplier for multiplying data stored in said frame memory by a second constant; a second adder for adding an output signal from said sign appending section to an output signal from said second multiplier; and an absolute value acquiring section for removing a positive or negative sign from an output signal from said second adder and outputting a resultant signal as an absolute value.