JVC Procision DLA-X750R 3D D-ILA Projector Review Test Bench
Full-On/Full-Off Contrast Ratio: 512,000:1 (approx.)
All of the measurements were taken with the projector in the User 1 preset and the lamp in low. The gamma correction preset was selected as Custom 1 (2.4), which measured nearly ruler-flat at 2.4. All of the calibration was done with the lens aperture in –10 and the Intelligent Aperture disabled, and the contrast ratio measurements were done in a variety of different modes for the aperture as noted in the review. The lamp had 74 hours on it during the calibration. All viewing and measurements were done on a 120-inch-diagonal Stewart Filmscreen StudioTek 100 screen (1.0 gain).
The full-on/full-off contrast was measured with a Minolta T-10 meter at 4 inches away from the lens face. I tested the projector in low lamp mode with the lens aperture in various positions. The highest native contrast ratio (Intelligent Aperture disabled) was obtained with the projector in low lamp mode with the aperture fully closed (–15) and in the longest throw condition (min zoom). This produced a contrast ratio of just over 124,000:1. Using the Intelligent Aperture in Auto 2 mode resulted in a peak contrast ratio of approximately 512,000:1 in low lamp mode. Keep in mind, with the Minolta T-10 meter used, a single-digit difference with low-level measurements results in a difference of nearly 100,000:1 in contrast, so these numbers aren’t absolute. They were repeatable, but measuring black levels this low results in a pretty large margin of error even with the meter tolerances. The user setup plays a huge role in what type of contrast performance you can expect to see out of this projector, or any other projector on the market today.
The RGB tables were captured from a calibration workflow in SpectraCal’s CalMAN Version 5.6.1. RGB, and grayscale tracking out of the box was quite good, with an average Delta E of 3.16 (anything under 3 is considered reference and imperceptible to the human eye). Some minor tweaks to the grayscale and gamma controls resulted in an overall Delta E average of 1.4, with a peak of less than 2. Gamma averaged 2.34 with the projector set to 2.4 and BT.1886 as my target gamma in CalMAN.
The color gamut in the Custom 1 preset was nearly spot on, with no value exceeding a Delta E of 3. Some small adjustments to red and blue were done, but given the out-of-box accuracy, I could have left it alone and been just fine. Luminance and Saturation values throughout the inner gamut were also very accurate. JVC has updated their auto calibration software that can be used to dial in the calibration a bit more using a Spyder 4 meter, but I didn’t find any real improvement compared with the results achieved with the standard menus.—KRD