Patent ID: 7550702

Claim:
A correction value determining method for each of a plurality of electro optical elements whose light intensity is controlled in accordance with a gray scale value and a correction value, the method comprising the steps of: (a) measuring a light intensity of each of the plurality of electro optical elements when the same gray scale value is specified to each of the plurality of electro optical elements, the plurality of electro optical elements measured including at least a first electro optical element having a first light intensity and at least a second electro optical element having a second light intensity that exceeds the first light intensity; and (b) determining the correction value for each of the plurality of electro optical elements such that each of the plurality of electro optical elements has a corrected light intensity, so that after the determining, a corrected light intensity of at least the first electro optical element exceeds a corrected light intensity of at least the second electro optical element.