JVC LT-47X899 LCD HDTV HT Labs Measures
Full-On/Full-Off Contrast Ratio: 1,302:1
The full-on/full-off contrast ratio above (sometimes referred to as the peak contrast ratio) was taken with Dynamic Gamma on. With Dynamic Gamma off, the contrast ratio dropped to 982:1 (25.53-ft-L white window, 0.026-ft-L full screen black). The peak white output with a full screen white image increased to 33.12 ft-L/34.68 ft-L (Dynamic Gamma On/Off).
The Color Tracking charts below show how well a display adheres to the D65 standard white point before and after calibration. The tighter the overlap of the three primary colors, the nearer the result is to the desired D65 standard. The pre-calibration result for the Low Color Temperature setting is respectable, but after calibration it’s even better. Only in the brightest whites is there a minor deviation (a bit of excess red, which is largely imperceptible on normal program material).
The black triangle in the pie-shaped CIE chart indicates the standard HD color gamut, and the white triangle is the actual color gamut after adjustments of the set’s color-management controls. These adjustments did not significantly improve the set’s out-of-box color gamut (not shown). The set’s green, in particular, remains significantly oversaturated.
The HDMI luma (black-and-white) resolution was superb up to the limit of our resolution test patterns in 1080i and 1080p. The chroma (color) response was also excellent. The 720p HDMI resolution was only slightly less impressive, but still very good. In component, the 1080i and 720p resolutions were satisfactory, but not as good as in HDMI. The 480i/p resolutions were good up to the limits of those formats in HDMI, but poor in component.
The JVC’s overscan was 0 in 1080p (HDMI) and 1080i (HDMI and component), with the Aspect control set to Full Native. It averaged about 2.5 percent in both HDMI and component in all other resolutions on each edge of the image (3.5 percent maximum) in Full (the Full Native Aspect mode is only available in 1080i/p).—TJN