Patent ID: 7023411

Claim:
An electronic price scale comprising: a display comprising a TFT type LCD as a display surface; an input section for adjusting a contrast of the LCD; and a contrast adjustment unit configured to adjust the contrast of the LCD by changing a luminance gradation for each color of colors displayable on the display; wherein the contrast adjustment unit comprises: a color pallet configured to store luminance gradation data of three primary colors of the colors displayable on the display; a display data forming section configured to read luminance gradation data corresponding to colors to be displayed on the display from the color pallet so as to form display data; a contrast correction value forming section configured to form a contrast correction value in accordance with input data input from the input section; a contrast correction display data forming section which corrects the display data Output from the display data forming section with the contrast correction value output from the contrast correction value forming section so as to form corrected display data; and a display drive section configured to drive the display based on the corrected display data output from the contrast correction display data forming section.