Unfortunately I'm suffering from RBE with this Optoma. Adjusting the settings helped some, but they're still there and still bothering me. I may have to switch to the BenQ if the color wheel speed is indeed faster. Is this true that the Optoma is only spinning at 2X? I thought it was between 4 - 6x? The faster the color wheel, the lower the RBE, right? So now I'm deciding between my Optoma, BenQ or the Epson 2030. I have 3 more weeks to play with this Optoma to decide. I like everything about this PJ (low noise, great color, etc) except the RBE. I'm reading thru this thread page by page and after 2 days I'm only on page 13 lol (reading while at work). I see some of you have tried other PJ's and compared. Anybody else who suffers from RBE and has experience with both? Any advice would be appreciated.
- I also see RBE with the fully calibrated 131Xe, although it's only on white in pictures (e.g I see it on subtitles quite consistently).
- In regards to the color wheel, I remember reading the 131 runs at x4 speed but I cannot find any information to back that up.
Not much help I know, just felt like joining in.
Here's the color wheel info the the W1070 (RGBRGB wheel) thanks to velconti:
1080p24 - 192Hz - 3.2x (192Hz/60Hz=3.2)
1080p50 - 300Hz - 5x (300Hz/60Hz=5)
1080p60 - 240Hz - 4x (240Hz/60Hz=4)
Here's the color wheel info for the HD131Xe/HD25e/etc. (RGBCYW wheel) thanks to neo-1771:
1080p24 - 144Hz - 2.4x (144Hz/60Hz=2.4)
1080p60 - 120Hz - 2x (120Hz/60Hz=2)
It's possible the HD131Xe speeds up when set to 1080p50 (like the W1070 does) but no one has tested that yet to my knowledge.
To be fair, the wheel speed is a bit deceptive due to how they're made. The list above is the "effective" speed, not the mechanical speed. Mechanically the W1070 runs @ 2.5x (yes 2.5x, they round up when they say 3x and thus 6x, at least according to the testing done) and the HD131Xe runs @ 2.4x (maybe higher @ 50Hz, dunno yet). The W1070 can say that they run at "6x" (5x according to testing) due to the color wheel repeating colors (RGBRGB). The RGBCYW wheel isn't allowed to claim double the speed due to it not repeating the same colors.
So technically both the W1070 and HD131Xe run @ 2x mechnical speed @ 60Hz. Supposedly the repeating colors (RGBRGB) show less RBE than RGBCYW, although you'll hear conflicting stories depending on who you ask.
That's the reason why Optoma quit publishing their color wheel info, because most people want to hear that big number (6x or etc.) and if they published they were only 2x it would be an instant turn-off. They chose the RGBCYW wheel because it gives higher lumens and better contrast at the cost of color. Whether it causes more RBE or not I can't say for sure (haven't seen both projectors personally and stories on the internet are conflicting).
To be fair, a color wheel would have to be 27x to eliminate RBE completely. Given that it's impossible to reach that with a single-chip DLP all we can do (in this price range) is learn to live with it or wait a few more years for multi-chip DLP/LED/Laser/etc. prices to drop.
EDIT: Here's a nice post I stumbled upon that explains why companies choose the color wheels that they do:
Edited by Maconi - 1/30/14 at 5:20pm