An image-correction-amount detecting device includes an
image signal generation unit, a luminance detecting unit, and a correction value calculation unit. The
image signal generation unit generates and supplies image signals having inverted polarities to a display section in which pixels are formed so as to correspond to intersections of a plurality of scanning lines and a plurality of
source lines which are arranged in a matrix and which performs pixel display by allowing an
image signal supplied to a source line to be applied to a pixel
electrode of each pixel via switching elements, the image
signal being supplied to the source line by turning on a switching element disposed in the pixel with the scanning
signal supplied to the scanning line. The luminance detecting unit detects the luminance of each pixel position of an image displayed by the display section. While changing the reference
voltage which is set in the display section, the correction value calculation unit calculates the difference of the luminance between a positive polarity image
signal and a negative polarity image signal in each pixel position, calculates the distribution of reference voltages in the display section which applies the minimum luminance difference, and outputs an
image correction amount to obtain the optimal reference
voltage that matches the effective value of the positive polarity image signal with the effective value of the negative polarity image signal.