Originally Posted by Soulburner
This and the BenQ MW526A seem to be competing for those looking for a 720p projector in the $400 range. I'd like to know how they compare but I haven't been able to find any comparisons.
The BenQ MW526A has a color wheel with 92 degree white segment 26% and very small CY segments. It is said to produce 660 good color lumens of the 3300 overall lumens.
The Viewsonic PJD5555W has a much smaller white segment 57 degrees 16% and larger CY segments. More important I feel is the amount of the color wheel given over to RGB is greater when comparing the two. Thus the good color lumens is said to be 860 with 3200 overall lumens.
The source of this information is the site colorlightoutput.com and keep in mind they compute color brightness by adding together only the RGB outputs I’m told.
There is some positives to the CYW segments in producing some colors and maintaining very reasonable color quality. For example having a yellow segment makes making some of the bright yellows much more efficient than making them from RGB alone just as having a white segment seems logical in producing a brighter color than making white by RGB. The positive effects of non RGB blending is seen as when a projector like the PJD5555W is actually measured in its best mode of movie presentation the readings come back 1000 lumens or higher.
I don’t profess to understand the methods different projector companies use to blend in these non RGB colors to make the same colors they would in a RGBRGB projector or if they even use them to expand the color gamut as they could in theory. They mainly adopted the idea as a trick to produce very high lumen business projectors without talking about a white segment as consumers caught on to that trick. Very few people seem to know very little about how it all actually works and having had the PJD5555W for going on 2 years and looking at the color wheel makeup and actual reviews of dozens in this same crossover group I felt it was one that had the greatest potential of all the ones I reviewed to do a good job with the non RGB segments and of course I was looking for the best for the least, and staying in the <$400 price point.
Without knowing how the color wheel is managed and no equipment to measure things with other than my eyes and others eye I have had watch it with me. I concluded This projector does a great job to about its mid overall lumen rating. So up to say 1500 lumens. I would say it would more than exceed my expectations of a <$400 projector and other than resolution PQ is on par with an RGBRGB at double the price point as I don’t know of a good recent 720p RGBRGB projector as there isn’t a market for one.
Above the midpoint of the total lumens output the PQ does not fail instantly and to be honest the projector is marketed as a business machine and never makes claims to have 3200 lumens of pure movie output. The analogy I make is what is needed in the classroom to try and maintain some CR and what is needed in a garage with a bunch of guys watching a football game are similar qualities. You may be willing to sacrifice some color accuracy for raw lumens of any type to try and get a CR that you can watch. That’s what this does that a RGBRGB will run out of gas trying to do. I might add if you compare the specs of any of these RGBCYW’s to RGBRGB’s you will notice the wattage max of the projectors quite a bit different the RGBCYW will be around 250w and the RGBRGB 350w. so you are getting more CR producing lumens from less power. Of course the people building the machines see that as a cost savings to make as well.
That’s my best comparison of the two projectors you mentioned and I had the BenQ on my list and picked the Viewsonic based around the color wheel design. I don’t think a whole lot of research is going into trying to get better colors out of RGBXXX projectors at this low price point. I was surprised the PJD came out as a new projector and seemed to be moving in the right direction and it also had a lot of HT type features built in as well like 3D and even anamorphic compression. Some other nice features that would never be used in the classroom. So who knows some people might still be working on making a bargain basement projector better.