PROJECTION DISPLAY UNIT

摘要

A projection display unit (101) which is capable of improving the video quality by using a light amount adjustment means of a simple structure assuring easy sharing and by adjusting the amount of the light irradiated onto a light bulb continuously and without generating variation in illumination intensity such that no undesirable light is irradiated onto a screen. The light amount adjustment means (9) has light shield materials (91L, 91R) for shielding the light going toward a second lens array (22) and rotational axes (91LA, 91RA) supporting each of the light shield materials rotatably on xy plane. The light shield materials (91L, 91R) and the rotational axes (91LA, 91RA) are arranged such that the rotational axes (91LA, 91RA) are located at symmetrical positions centering on an optical axis (AX) on xy coordinates and a rotational range from a light shielding start position where the light shield materials (91L, 91R) begin to shield the light going toward a second lens array (22) through rotating operation to a maximum shielding position where the light shield materials shield the largest amount of light going toward a second lens array (22) is 90 degrees or less.