Patent ID: 8436803
Filing Date: 2013-05-07
Classification: G09G,H04M,H04N

Abstract:
1. An image display apparatus, comprising: a display unit, which operates in accordance with calculated luminance; a detection unit for illuminance, which detects a surrounding illuminance; a calculation unit for display luminance, which calculates the display luminance of the display unit based on the surrounding illuminance detected by the detection unit for illuminance and on a predetermined rule; a storing unit for rule, which stores said predetermined rule; and a variation unit for rule, which varies, based on user's input, the rule stored in said storing unit for rule, wherein said storing unit for rule further comprises, storing means for luminance range rule, which stores a rule for determining a maximum value and a minimum value of the display luminance determined in accordance with the surrounding illuminance as the predetermined rule, wherein said variation unit for rule further comprises, external input means for inputting values utilizing user interface on the display; variation means for luminance range rule, which varies the maximum value and the minimum value in accordance with the inputted values by the external input means; and variation restriction means dependent on illuminance, which restricts the variation by the variation means for luminance range rule in accordance with the surrounding illuminance detected by the detection unit for illuminance, and wherein said variation restriction means dependent on illuminance restricts the variation, so that only the maximum value in the storing means for luminance range rule is variable if the surrounding illuminance is more than a threshold as a predetermined illuminance, and restricts the variation, so that only the minimum value in the storing means for luminance range rule is variable if the surrounding illuminance is less than the threshold as the predetermined illuminance.