In a projection-type display device 1, a display control device 2 that controls a first DMD 50 and a second DMD 70 is composed by comprising an interface circuit 2a, a mirror device drive circuit 2b for controlling the driving of the micromirrors of second DMD 50, a mirror device drive circuit 2c for...http://www.google.de/patents/US20050190140?utm_source=gb-gplus-sharePatent US20050190140 - Gradation control device, optical display device, gradation control program, optical display device control program, method of controlling gradation and method of controlling optical display device
