Color Wheel Speed Confusion - AVS Forum
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post #1 of 22 Old 06-22-2013, 04:43 PM - Thread Starter
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What is a color wheel at this rating?

6-seg RGBCYW / 7200rpm Color Wheel with 144hz capability.
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post #2 of 22 Old 06-22-2013, 05:23 PM
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7200/60/60 = 2

With the doubled up segments that would be rated at a 3x or 4x color wheel depending on what they call things.

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post #3 of 22 Old 06-22-2013, 05:39 PM - Thread Starter
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So its at least a 3X speed wheel? thats decent right?

Also the 144hz refresh rate should help too right?

I HATE RAINBOWS BUT LOVE DLP! tongue.gif
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post #4 of 22 Old 06-23-2013, 04:54 AM - Thread Starter
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Originally Posted by AV_Integrated View Post

7200/60/60 = 2

With the doubled up segments that would be rated at a 3x or 4x color wheel depending on what they call things.


So how would I find this out? Is 3X considered the standard? Is there much difference between 3X and 4X?
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post #5 of 22 Old 06-23-2013, 06:05 PM
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You know, I'm just running some basic math. Realistically, if that wheel spins at 7200RPM, then I'm not sure how it's generating a 144hz image because the wheel would be spinning faster than 1/144th of a second every full rotation. The wheel is spinning 120 times a second at 7200RPM. If it were showing an image at 120hz, then it would be a 1x color wheel, but probably called a 2x because of the extra segments.

Since the manufacturer doesn't really list the color wheel speed, I'm really not quite sure how they are doing things. But, my expectation is that the color wheel speed is slow, and 3x/4x speeds are generally what I consider slow. I know I can see rainbows on my BenQ W1070 fairly easily. I can't believe in the last 5+ years that color wheel speeds haven't jumped to 12x and 18x as a standard for DLP.

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post #6 of 22 Old 06-23-2013, 06:08 PM - Thread Starter
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my unit needs 144hz glasses. It used RGBYCM 6 segments specs say 7200 rpm but it runs 144hz so I am just as confused as you.

120hz glasses will NOT work with my PJ
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post #7 of 22 Old 06-23-2013, 06:57 PM
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I never saw a rainbow on my 5 year old Mits HD1000U but I just replaced it with the Benq W1070 and now I see them frequently. Seems like the technology is going the wrong way.
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post #8 of 22 Old 06-23-2013, 07:07 PM - Thread Starter
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That used a 4X wheel with 6 segments.

Were they RGB? or RBGYCM on the Mits HD1000U?



I really hope my 6 RBGYCM 7200 RPM seg wheel is good. people been saying its around 3X or 4X
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post #9 of 22 Old 06-23-2013, 07:38 PM
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The Mits has a 7 segment color wheel (R/G/B/W/R/G/B) at 4 x speed. They threw in a white segment. Maybe that extra segment is what makes the difference. I've only had the Benq for 5 days but these rainbows (only in 2d mode) may cause me to send it back and try something else.
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post #10 of 22 Old 06-23-2013, 07:40 PM - Thread Starter
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Do you think I will notice rainbows at 3X 6 SEG RGBYCM 7200 RPM 144hz Refresh Rate?

I have a plasma and noticed the Phosphor green glow trail... BUT it never bothered me
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post #11 of 22 Old 06-23-2013, 07:50 PM
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Never thought I would see them with the Benq. Only way I know is try out which ever projector you're interested in.
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post #12 of 22 Old 06-23-2013, 07:52 PM - Thread Starter
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What model benq? what speed color wheel and segments? whats the refresh rate i heard that matters too
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post #13 of 22 Old 06-23-2013, 08:34 PM
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Quote:
Originally Posted by Jonathan Hersey View Post

What model benq? what speed color wheel and segments? whats the refresh rate i heard that matters too
Benq W1070. Very popular projector
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post #14 of 22 Old 06-23-2013, 08:35 PM - Thread Starter
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Thats a 6X speed! 144hz! RGBRGB! why does it have RBE?!
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post #15 of 22 Old 06-23-2013, 08:41 PM - Thread Starter
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post #16 of 22 Old 06-24-2013, 07:12 AM
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Originally Posted by Jonathan Hersey View Post

Thats a 6X speed! 144hz! RGBRGB! why does it have RBE?!

It depends on the input signal and unfortunately the W1070 is not running the color wheel at 6X for 1080p/24 (e.g., Blu-ray) inputs. There doesn't appear to be a good reason why BenQ designed it this way, but the W1070's color wheel operates at lower RPM with a 24Hz input (as compared to 50 Hz. input) and only provides an effective ~3X for 24 Hz inputs and this results in visible RBE for many people. Even for 60Hz inputs it only provides an effective 4X color wheel speed. This has been discussed in the W1070 thread (HERE) starting at post #4520.




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post #17 of 22 Old 06-24-2013, 09:32 AM - Thread Starter
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Glad I didnt get the w1070 or 1080ST...

Does the Optoma HD33 perform the same? It seems to have identical specs as far as color wheels go.
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post #18 of 22 Old 06-24-2013, 09:44 AM
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If your sensitive to rbe, consider looking at the sharp 30k.

This is one of the few dlp's i've seen where the cw speed is fast enough to generally avoid rainbows for my sensitive eyes.

The 3D contrast on this model is excellent due to using IR vs. Dlplink on the BQ.
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post #19 of 22 Old 06-24-2013, 10:10 AM - Thread Starter
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haha how much? i spent $735 on a model identical in specs to the benq W1070
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post #20 of 22 Old 06-24-2013, 11:38 AM
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Originally Posted by Jonathan Hersey View Post

haha how much? i spent $735 on a model identical in specs to the benq W1070

$1900 with emitter, 2 pair of glass, 2:1 power everything lens and 3 year warranty wink.gif Yes, much more...
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post #21 of 22 Old 06-24-2013, 11:46 AM - Thread Starter
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Thats a killer deal. Someone will love it! I think the input lag might be higher though. seems very advanced and has a lot of processing hardware
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post #22 of 22 Old 06-24-2013, 11:53 AM
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Thats a killer deal. Someone will love it! I think the input lag might be higher though. seems very advanced and has a lot of processing hardware
I think others said the lag was not the worst but not the best I don't game so no clue.. However, that's the way it goes.. give and take, always some compromise!
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