Patent ID: 8342693

Claim:
A dynamic projection adjusting method for a projection display device, the projection display device displaying an output image and including a light source driven by a periodic pulse signal including a relatively high penetration signal interval and a relatively low penetration signal interval, the relatively high penetration signal interval and the relatively low penetration signal interval respectively including a first interval power and a second interval power, the dynamic projection adjusting method comprising the steps of: (a) determining a brightness parameter of the output image; (b) adjusting the periodic pulse signal by adjusting at least one of the first interval power of the relatively high penetration signal interval and the second interval power of the relatively low penetration signal interval according to the brightness parameter, wherein the first interval power of the relatively high penetration signal interval and the second interval power of the relatively low penetration signal interval are inversely adjusted when both are to be adjusted; and (c) driving the light source with the periodic pulse signal.