Projector Reviews

Full-On/Full-Off Contrast Ratio—3100:1; ANSI Contrast Ratio—474:1

Measured Resolution with the Leader LT-446:
480: 470 (per picture height)
720p: 720
1080i: out to the limits of the 1280 by 720 DMDs

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

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

Measured Color Points:
Red Color Point: x=0.637, y=0.338
Green Color Point: x= 0.301, y= 0.598
Blue Color Point: x= 0.152, y= 0.058

The top chart shows the 777'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 6500K color-temperature mode, measures slightly cool across the gray-scale range. After making adjustments using the Photo Research PR-650, the gray scale measures within 64 Kelvin of D6500, the accurate color temperature, across the entire range.

The bottom chart shows the gray scale (or color temperature) relative to the color points of the display's red, green, and blue DMDs. These are extremely close to those specified by SMPTE. Red is very slightly reddish-orange, blue is slightly purplish-blue. Green is pretty much spot on.

After calibration, and using a full-field 100-IRE white (43.4 foot-lamberts) and a full-field 0-IRE black (0.014 ft-L), the contrast ratio was 3,100:1. Using a 16-box checkerboard pattern (ANSI contrast), the contrast ratio was 474:1. This is on an 87-inch-wide, 1.0-gain Da-Lite Da-Mat screen.—GM