Patent ID: 7551179

Claim:
An image display apparatus, comprising: an image signal processing unit that adjusts input grayscale values included in an input image signal according to a predetermined grayscale characteristic; a display unit that displays an image based on an image signal including an output grayscale value adjusted by the image signal processing unit; a grayscale characteristic changing unit that changes a defined correlation between the input and output grayscale values based on the grayscale characteristic; an OSD unit that displays a selection screen used to decide a to-be-used grayscale characteristic among a plurality of grayscale characteristics including a custom characteristic capable of changing the correlation between the input and output grayscale values so as to overlap the image; and a manipulator that receives a selection manipulation of selecting one of a plurality of the grayscale characteristics, and a decision manipulation of deciding the grayscale characteristic selected by the selection manipulation, in a state that the selection screen is displayed, the image signal processing unit adjusting the image signal according to the grayscale characteristic finally decided by the decision manipulation, and adjusting the image signal according the grayscale characteristic selected when the selection manipulation is performed in a state that the selection screen is overlapped.