Panasonic PT-AE700U LCD Projector HT Labs Measures
Full-On/Full-Off Contrast Ratio—711:1; ANSI Contrast Ratio—161:1
Measured Resolution with the Leader LT-446: 480: 470 (per picture height) 720p: Out to the limits of the 1280-by-720 panels 1080i: Out to the limits of the 1280-by-720 panels
DC Restoration (poor, average, good, excellent): Excellent
Color Decoder (poor, average, good, excellent): Good
Measured Color Points: Red Color Point: x=0.644, y=0.337 Green Color Point: x=0.299, y=0.625 Blue Color Point: x=0.148, y=0.053
The left chart shows the PT-AE700U'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 0 color-temperature mode, measures slightly cool across the gray-scale range. After making adjustments using the Photo Research PR-650, the gray scale measures closer, within 300 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 liquid crystal panels. These are fairly close to those specified by SMPTE. Blue is very slightly oversaturated and purple, and green is slightly oversaturated.
Using a full-field 100-IRE white (13.5 foot-lamberts on an 87-inch-wide, 1.0-gain Da-Lite Da-Mat screen) and a full-field 0-IRE black (0.019 ft-L), the contrast ratio was 711:1. Using a 16-box checkerboard pattern (ANSI contrast), the contrast ratio was 161:1. The best contrast ratio and brightest image were achieved in the high lamp setting with the iris set to auto.—GM