- Written by Chris Eberle
- Published on 20 January 2012
The BenQ W1200 DLP Projector On The Bench
Equipment used: EyeOne Pro spectrophotometer, CalMAN Professional 3.7 analysis software, Accupel HDG-3000 signal generator, Spears & Munsil Benchmark Blu-ray disc.
All measurements were taken off the screen (Carada Brilliant White, gain 1.4) from the seating position (10 feet back). Video processing tests were performed using an Oppo BDP-93 connected directly to the projector and set to Source Direct mode. The W1200 was set to Cinema mode with the lamp at low power (economy).
Pre-calibration color is only fair with significant errors in luminance for all colors but red. Measured Y values ranged from 1 to 15fL of oversaturation. The CIE chart looks OK but since there’s a CMS available, I wasn’t too worried. The impact on image quality would be a slightly cartoonish look to bright colors with crushing of high-end detail.
Grayscale ran noticeably warm on the Normal preset. The tracking is quite good however with a straight-line consistency from bottom to top. This is a good sign because all one needs to do is bring the three primaries together with the white balance controls. Gamma was fairly flat but too bright resulting in a washed-out look to the picture.
After spending some time with the CMS, I achieved the below result. Luminance is pretty much perfect, and the color points are right on the money with the exception of blue. There was simply not enough adjustment range to bring blue into the triangle. It was pretty close though with a Delta E of 8.7. All other Deltas were under 1. I would call this an excellent result.
Grayscale tracked perfectly from 20 to 100 percent with some of the lowest errors I’ve ever measured. This is within the tightest tolerances of my meter. It doesn’t get better than this. Gamma was not quite perfect but pretty close. Mid-range values ran around 2.3 with a solid 2.2 at both ends of the scale. With the light black levels though, I preferred to click the gamma control one notch higher (darker) which improved intra-image contrast. Please see my comments in the In Use section for more detail on how I set gamma with the W1200.
Contrast performance was average for a DLP projector in this price range. Minimum black measured .02 fL which is more of a dark gray. This impacted the picture negatively giving it a slightly washed-out look. Increasing the gamma correction helped add some depth. I believe 2.2 is not the right setting for the W1200. It looks better at 2.6. Maximum light output in the calibrated Cinema mode was 18.5 fL for an on/off contrast ratio of 925:1. This could be increased a bit by turning up the Contrast control but it didn’t make the perception of contrast any better.
Screen uniformity was excellent with no visible tint or variation anywhere. This speaks to the lens quality which was very good. Detail popped on sharp images from Blu-ray discs. In crosshatch test patterns, I could see the pixel structure clearly when I viewed the screen up close; a very strong indicator of good optics.
Video processing was quite good with all motion tests passed save the mixed content vertical which showed combing artifacts on the scrolling text. As you can see in the table, an RGB Video signal produces the greatest resolution. YCbCr signals would not resolve the highest frequency pattern on the chroma burst.