IMAGE DISPLAY

摘要

The diaphragm light quantity adjustment function used for controlling the quantity of light so as to improve the contrast of the projected image is controlled so that the variation with the variation of the light source drive power for the purpose of life prolongation is canceled. By such a control, the quantity of light inputted into the display element can be maintained constantly, and both the light source life prolongation and the projected image free of luminance fluctuation are realized.