Rear-Projection TVs

Full-On/Full-Off Contrast Ratio—929:1; ANSI Contrast Ratio—110:1

Measured Resolution with the Leader LT-446:
480: 480 (per picture height)
720p: 480 (pph)
1080i: 690 (pph)

DC Restoration (poor, average, good, excellent): Excellent

Color Decoder (poor, average, good, excellent): Excellent

Measured Color Points:
Red Color Point: x=0.646, y=0.335
Green Color Point: x=0.285, y=0.695
Blue Color Point: x=0.146, y=0.048

The left chart shows the HD-70G886's gray scale relative to its color temperature at various levels of intensity, or brightness (20 IRE is dark gray; 100 IRE is bright white). The gray scale as set by the factory, in the low color-temperature mode and the Theater Pro picture mode, measures slightly warm with the darkest images but somewhat cool with the rest of the gray-scale range. After making adjustments using the Photo Research PR-650, the gray scale still measures too warm with the darkest images, accurate with midtones, and back to cool with the brightest images. It is within 783 Kelvin of D6500, the accurate color temperature, across the entire range.

The right chart shows the gray scale (or color temperature) relative to the color points of the display's red, green, and blue LCOS panels. These are somewhat off those specified by SMPTE. Red is very slightly oversaturated, and blue is oversaturated and slightly bluish-purple. Green is very oversaturated.

Using a full-field 100-IRE white (130.1 foot-lamberts) and a full-field 0-IRE black (0.140 ft-L), the contrast ratio was 929:1. Using a 16-box checkerboard pattern (ANSI contrast), the contrast ratio was 110:1.—GM