Patent ID: 6891524

Claim:
A display device comprising: a light source for emitting a light; a light modulation element for modulating the emitted light; and picture signal inputting means for receiving a picture signal from the outside and inputting a driving signal for driving said light modulation element to said light modulation element, in which said light modulation element modulates the light based on the picture signal and an image is displayed, wherein said picture signal inputting means comprises target light amount calculating means and light amount controlling means, said target light amount calculating means calculating an adequate light amount for an image display and said light amount controlling means receiving the signal from said target light amount calculating means and controlling the light so as to obtain a target light amount; and wherein said picture signal inputting means changes signal amplification rates in at least two input ranges for changing input-output conversion characteristics according to an output of said target light amount calculating means, and in the two input ranges of the input-output conversion characteristics said picture signal inputting means largely amplifies the driving signal when the picture signal has a low luminance and slightly amplifies the driving signal when the picture signal has a high luminance, whereby an amplification rate of input at the low luminance is larger than an amplification rate of input at the high luminance.