Originally posted by bgosselin
Can you explain to me what spoke time mean? In the Optoma H77 service menu there is a fonction call Spoke light on: choice are white,black,red,green,blue
I sometimes refer to spoke time as no-man's-land, but spoke time is more accepted.
I'm not sure what all those choices are, but basically if you picture a colorwheel you will see that there are transition points between the segments, like where red becomes green. The logic for the chips and mirrors aren't fast enough to follow that line as it passes across the chip, so in general all mirrors are turned off during this time, which is called the spoke time. However, one way to get more white is to leave all the mirrors on for pixels that are supposed to be white during the spoke time for all 3 primaries (assuming a 6 segment wheel). This adds red, green, and blue, so essentially white. However, it messes up the grayscale and normal images because whites get really bright, where other things don't. It can still be a good way to fight ambient light if your images are getting totally washed out though (like in a boardroom). Basically, it works like the white segment on a business DLP, but just using 3 spoke times to equal one white.
I'm guessing that "white" means blow out these whites by turning the mirrors on during this spoke time. "Black" is the normal mode for HT. The "red", "green", and "blue" probably have something to do with leaving the mirrors on more as only those segments are entered or left, but I'm not sure of the actually functionality that would be.