Test Bench: Sharp Aquos LC-52D92U 52-inch LCD HDTV

Color temperature (User Mode/Low Color Temperature): 20 IRE: 8,104 K 30 IRE: 7,589 K 40 IRE: 7,651 K 50 IRE: 6,643 K 60 IRE: 8,019 K 70 IRE: 8,040 K 80 IRE: 7,802 K 90 IRE: 7,721 K 100 IRE: 7,454 K Brightness (100-IRE window): 35.7 ftL

With the Sharp's Low color-temperature preset selected, its grayscale tracked within ±1,540 degrees kelvin of the 6,500-K standard from 30 to 100 IRE, which is poor performance. (Discussion with a Sharp technician confirmed that traditional, ISF-style service-menu grayscale calibration isn't possible with the LC-52D92U.) Measurements also showed deficient green level throughout the set's grayscale, as well as oversaturated red, green, and blue color points relative to the SMPTE HD specification. Color decoder tests revealed a +15% red push on the HDMI inputs - a higher than average amount.

Overscan - the amount of picture area cut off at the edges of the TV's screen - measured 0% in Dot-by-Dot mode when displaying high-definition signals. The set displayed both 1080i and 720p test patterns with full resolution via both the HDMI and component-video connections. The set's HDMI connections wouldn't accept 1080p/24-fps signals but had no problem with 1080p/60 signals from a Blu-ray Disc player. Screen uniformity was excellent when the set was viewed from off-center seats, and there was no sign of the color "banding" that showed up on Sharp's previous-generation 52-inch model tested in 2006 (the Sharp Aquos LC-52D62U). The set appeared to have no problem with 2:3 pulldown processing when displaying regular movies, but it failed the 2:3 pulldown test on the Silicon Optix HQV test DVD and showed considerable "jaggy" artifacts on those tests as well.

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