Patent ID: 8451383

Claim:
An image display device comprising: an image projecting unit configured to externally carry out enlargement projection of an image corresponding to a main image signal; a basic property selecting unit configured to select data of a predetermined basic gamma property from data of a plurality of predetermined basic gamma properties having a mutually different property across a whole range of a signal level range of said main image signal; a correction property selecting unit configured to select data of a predetermined correction gamma property from data of a plurality of predetermined correction gamma properties having a mutually different property in a partial range within the signal level range of said main image signal; a gamma property calculating unit configured to calculate data of a gamma property for each signal level of said main image signal based on the data of said predetermined basic gamma property selected at said basic property selecting unit, and the data of said predetermined correction gamma property selected at said correction property selecting unit; a gamma correcting unit configured to subject said main image signal to gamma correction based on the data of said gamma property calculated at said gamma property calculating unit; an operating unit configured to output a first signal corresponding to the selection operation of the data of said predetermined basic gamma property by a user, and a second signal corresponding to the selection operation of the data of said predetermined correction gamma property by a user; and a control unit configured to control each of the selection operation of the data of said predetermined basic gamma property at said basic property selecting unit, and the selection operation of the data of said predetermined correction gamma property at said correction property selecting unit, based on said first signal and said second signal output from said operating unit, wherein the gamma property calculation unit calculates the data of the gamma property by superimposing the data of the selected predetermined basic gamma property and the data of the selected predetermined correction gamma property.