I apologize for the length of this post, but recently I did some calibrating of my Benq W1070 using a meter in 3D mode and I thought the results might be useful to some of you. Based on recommendations in this thread, I purchased 1 pair each of the True Depth and Monoprice glasses. I thought I would compare them and then buy more pairs of whichever one I liked better. I also purchased a pair of the Sainsonic Black glasses from Amazon for comparision, but ended up returning them (see below).
I'd have to say that in general I haven't been that impressed with the 3D picture on this projector using the default 3D mode settings. The colors and image detail seem very washed out, which is why I set out to try and balance the gray scale and color a little better.
To take measurements, I taped the 3D glasses to my meter (i1 Display Pro), and placed them in front of the screen, mounted on a microphone stand. I took seperate measurements with the True Depth and Monoprice glasses and they actually turned out to give fairly similar results. I tried the same with the Sainsonic glasses, but I couldn't get them to sync reliably that close to the screen, so I gave up and just used the True Depth and Monoprice glasses - they had no problem syncing up close to the screen.
In the intial white balance measurements, you'll notice how low the red levels are - in fact beyond about 60 IRE they were virtually undetectable by the meter. The main reason people recommend the True Depth and Monoprice glasses is because they are very good at removing the DLP link "red flash". I suspect the low red levels in general are a side effect of this.
True Depth Glasses:
Generally, I'm not a fan of Brilliant Color, but I decided that 3D mode could use a little extra "pop", so I took a second set of measurements with BC turned on. What I found was that while the color levels tend to not be balanced very well (green is pushed much higher that blue), it does tend to put back a lot of the red that the glasses filtered out. For this reason, and because it also adds a little more brightness to the picture (something you can always use in 3D mode), I decided to leave BC on and adjust from that baseline.
True Depth Glasses with BC:
Monoprice Glasses with BC:
To balance the colors, I had to turn up the red gain a lot. I also lowered the the offsets considerably to reduce the "over-driven" effect of the default values (more with the True Depth glasses). As you can see from the graph, I did not try to bring all of the levels down to zero. I left them higher at the low IRE levels to compensate a little for the darkness of the 3D picture. The result is a gamma closer to 2.1 than 2.2, but I think it strikes a good balance between contrast and shadow detail. At 100 IRE there was a large drop off in the red level. Anything I did to try and raise the level of red there tended to disrupt the whole curve so I didn't worry about that one and focused on blancing the middle IRE levels.
True Depth Glasses Post Calibration:
Monoprice Glasses Post Calibration:
I also took CMS measurements and made some adjustments, but the colors weren't bad out of the box, so I won't go into detail on that. Post calibration, I think that the colors appear much more accurate and there is much less of that "washed out" effect I complained about earlier. The picture is still quite dark - but that is just the nature of 3D viewing. I decided to get more pairs of the Monoprice glasses and make those my primary 3D viewing glasses, because the results were similar to True Depth and my family liked the fit better.
I hesitate to post specific settings because every projector, lamp, and viewing environment are different, but here they are to give you some idea of how much I had to change them from the default:
Edited by sigma957 - 3/23/13 at 10:40am
Setting Default True Depth Monoprice
Brightness 50 50 47
Contrast 50 47 47
Red Gain 95 115 118
Green Gain 89 90 89
Blue Gain 93 100 102
Red Offset 256 206 235
Green Offset 264 224 265
Blue Offset 256 211 254