Test Bench: Sharp LC-52D62U 52-inch LCD HDTV
Color temperature (User Mode/Low Color Temperature): 20 IRE: N/A 30 IRE: 6,576 K 40 IRE: 7,301 K 50 IRE: 6,951 K 60 IRE: 6,610 K 70 IRE: 6,561 K 80 IRE: 6,437 K 90 IRE: 6,684 K 100 IRE: 6,617 K Brightness (100-IRE window): 50.4 ftL
With the Sharp's User Mode and Low color-temperature preset selected, its grayscale tracked within ±800 degrees kelvin of the 6,500 K standard from 30 to 100 IRE, which is below-average performance. The set's Movie mode delivered similar results but with a more pronounced blue bias at the low end. Our measurements also showed a green deficiency throughout the set's grayscale, although color decoder tests showed only a -5% green error and 0% red error for both its HDMI and component-video inputs. The set's color points, meanwhile, were relatively accurate.
Overscan - the amount of picture area cut off at the edges of the TV's screen - measured 0% in 1080i Dot-by-Dot mode and 4% in the 16:9 Stretch mode with 720p signals (the latter is a higher-than-average amount). The set displayed 1080i and 720p test patterns with full resolution via the HDMI inputs, but 1080i patterns viewed through component-video connections looked slightly soft. Screen uniformity was excellent when the set was viewed from off-center seats, but color "bands" were clearly visible on full-field gray test patterns - a problem that was also visible on regular program material. Curiously, the set had no problem with 2:3 pulldown processing when displaying regular movies yet failed the 2:3 pulldown test on the Silicon Optix HQV test disc. This most likely indicates a slow response to film-cadence detection in video programs.