Patent ID: 6903714

Claim:
A gray level conversion method, applied to a device comprising: a conversion section for obtaining a conversion signal by applying a conversion process to an input signal in accordance with a conversion characteristic; and a display element for executing a display with a gray level in accordance with a display characteristic with respect to a value of said conversion signal, wherein said conversion characteristic is set by a processing device, which uses said display characteristic and a desired characteristic with respect to said gray level in association with said input signal, wherein said desired characteristic is obtained by the processing device, said method comprising the steps of: (a) finding a value of said gray level given by said desired characteristic in response to a set value of the input signal; (b) finding said display characteristic using said conversion signal obtained from said conversion section by adopting, as said conversion characteristic, a characteristic that makes said input signal and said conversion signal virtually equal to each other; (c) finding the value of said conversion signal that gives said value of said gray level found at said step (a) in accordance with said display characteristic; (d) setting said conversion characteristic based on a relationship between said value of said input signal set at said step (a) and the value of the conversion signal found at said step (c).