Originally Posted by Elix
........ I was under the impression that 5x is the physical color wheel speed, but it only appears to be 2.5x. Fastest color wheel speed now is 3x (Optoma HD33, BenQ W1070 and some others). Does it mean they show the same amount of RBE? Don't know.
1X means that red, blue and green image subframes are displayed one time each 1/60 second. Older color wheels only had 3 segments, but many newer models, such as the W1070, have 6 segments with the RGB repeated two times. Thus such a 6-segment color wheel that is mechanically rotating at 3X speed will produce an effective 6X speed with each of the R, B and G subframes displayed 6 times each 1/60 sec. Such a color wheel setup will show less RBE than other projectors using color wheels with a lower effective speed.Edited by Ron Jones - 1/23/13 at 7:46am