Double modulation projector control device and its program, and double modulation projector

摘要

PROBLEM TO BE SOLVED: To provide a double modulation type projector which facilitates high gradation display. SOLUTION: In a double modulation type projector 1, an optical LPF 15 averages light from a DMD element 13 in pixel block units, and a control device 20 drives a full drive pattern and a plurality of partial drive patterns in advance. The pattern setting unit 22, the first modulation control unit 23 that drives the DMD element with each of the full drive pattern and the partial drive pattern based on the video signal, and the DMD element 16 with the full drive pattern and the part based on the video signal. A second modulation control unit 24 that is driven by each of the drive patterns is provided. [Selection diagram] FIG. 5