Patent ID: 7142182

Claim:
An image processing circuit, comprising: a control-signal generating device that generates a control signal indicating a type of an electro-optical panel used in combination with the image processing circuit; a D/A conversion device that converts input image data from a digital signal to an analog signal to generate an image signal and that adjusts a range where a signal level of the image signal is changed, according to the control signal; and a processing device that generates an output image signal to be sent to the electro-optical panel, according to the image signal, the processing device further comprising: an image-signal inversion section that inverts a signal polarity of the image signal at an inversion period determined in advance, with a certain potential being used as a reference while amplifying the image signal to generate an inverted image signal; a reference-signal generating section that generates a first reference voltage and a second reference voltage according to the control signal, and that alternately selects one of the first reference voltage and the second reference voltage at the inversion period to generate a reference signal; and an output-image-signal generating section that synthesizes the inverted image signal with the reference signal to generate the output image signal.