Test Bench: Eight Budget HDTV Projectors
(continued)
BenQ PE7700
Color temperature (before/after calibration)
Low window (30 IRE): 6,776/6,409 K
High window (80 IRE): 7,254/6,470 K
Brightness (100-IRE window before/after calibration): 17/11.9
Before calibration the BenQ PE7700's grayscale varied by an average of 580 kelvin from the 6500K standard, which was fourth-best of the group of eight. Afterward it varied by just 51K, tied for second-best. (Calibration needs to be performed by a qualified technician, so discuss it with your dealer before purchase, or contact the Imaging Science Foundation at imagingscience.com or 561-997-9073.) Its real-world contrast ratio of 109.2:1 was also fourth-best. Primary-color accuracy was good, with green being the worst offender, and the color decoder desaturated green somewhat for both standard-def and high-def sources. When set to its optimal Real aspect ratio, the PE7700 resolved every line of a 720p multiburst patten via HDMI (but not via component-video), although the outputs from 1080i, 480p, and 480i inputs were relatively soft. Edge enhancement was negligible from all inputs; uniformity was average for a DLP, with the bottom edge of the image visibly brighter. Black levels did not fluctuate depending on program content, overscan was 0% in the Real aspect ratio mode, and focus was excellent and fringing negligible on convergence patterns. Standard-def video processing was excellent on the HQV jaggies patterns, smoothing out diagonal lines extremely well, but 2:3 pulldown detection was the worst in the group, taking nearly 1 second to engage.
See the review of the BenQ PE7700
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