BenQ HT5550 Projector Review- Advanced Calibration

July 23, 2019 / By Project Reviews Staff

BenQ HT5550 Projector Review – Advanced Calibration: CMS Calibration, Calibration Charts

CMS SETTINGS FOR BEST MODE 1080P REC.709 CALIBRATION – CINEMA MODE

RGBCMYHueSaturationBrightness
Red206197198
Green265211175
Blue174200162
Cyan240200200
Magenta29791203
Yellow165165183

The default color gamut was hand adjusted at the factory. The values for all six colors were not at their centered (default) positions as most projectors are. The pre-calibration color gamut measurements were actually quite good but had the familiar errors I see on nearly all DLP projectors. The most common of these is saturation linearity errors, seen here mostly with red. Also, some of the colors don’t make it out to 100% REC.709 and there are the hue errors especially among the secondary colors. Thankfully the CMS does work well and so I was able to make improvements in all those areas I mentioned. Post-calibration color gamut was excellent, one of the best I’ve seen with DLP.

[sam_pro id=1_62 codes="true"]

CMS Settings for Best Mode 4K/HDR – Cinema Mode

RGBCMYHueSaturationBrightness
Red206200200
Green177200200
Blue200200200
Cyan170200200
Magenta187188200
Yellow188209200

BenQ advertises the HT5550 as hitting 100% of the P3-DCI color gamut (with the WCG filter on). My pre-CMS calibration measurements did not bear this out. Except for magenta all the colors fell short of their 100% saturation targets. Red, green and yellow were the worst offenders ranging from 70 to 90% coverage and the oh so common linearity issues were also on display.

During my CMS calibrations, I was able to move the 100% saturation points out a tiny bit. If I moved them too much however, it would increase the linearity errors of the lower saturation points. Overall, I felt post-calibration image/color did look better than it actually measured through the HDR effect was low (even for a projector).

CMS SETTINGS FOR BRIGHTEST MODE (WCG OFF) 4K/HDR CALIBRATION – CINEMA MODE

With the wide color gamut filter off for this Brightest Mode 4K/HDR calibration we know going in we would be dealing with a color gamut closer to REC.709 but gaining nearly 50% increase of lumen output due to keeping the wide color gamut filter off. Normally in this situation I would measure the color gamut with a REC.709 target inside the REC.2020 container. When I tried that I got results that were so messed up they were really useless. So, I used the P3 target same as I did for my first 4K/HDR calibration that used the wide color gamut filter. Although we know we’re not going so see the colors reach out to 100% saturation at least the charts make much more sense. Now here’s the weird part. Without the WCG filter in place the color gamut is actually not that different than with the filter. Blue, magenta and red are basically the same while cyan, green and yellow are a little lower with green measuring the lowest at 60% P3 saturation. I attempted to calibrate CMS but after seeing limited results I decided it was best to leave the CMS alone since the projector has to perform some kind of color remapping.

[sam_pro id=1_65 codes="true"]

RGBCMYHueSaturationBrightness
Red200200200
Green200200200
Blue200200200
Cyan200200200
Magenta200200200
Yellow200200200

[sam_pro id=1_34 codes="true"]

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