Rear-Projection TVs

Full-On/Full-Off Contrast Ratio—1,189:1;

ANSI Contrast Ratio—226:1

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

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

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

Measured Color Points (Before Calibration):
Red Color Point: x=0.651, y=0.327
Green Color Point: x=0.300, y=0.599
Blue Color Point: x=0.149, y=0.059

Measured Color Points (After Calibration):
Red Color Point: x=0.640, y=0.330
Green Color Point: x=0.300, y=0.600
Blue Color Point: x=0.150, y=0.060

The top chart shows the HL-S5679W'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 Warm2 color-temperature mode and the Movie picture mode, measures cool with the darkest images and warm across the rest of the gray scale. After making adjustments using the Photo Research PR-650, the gray scale measures much closer to D6500, the accurate color temperature, across most of the range. The darkest images were still cool.

The bottom chart shows the gray scale (or color temperature) relative to the color points of the display's red, green, and blue LEDs. These are very close to those specified by SMPTE. Red is slightly oversaturated. After color-point calibration, the color points measured at exactly the SMPTE spec. This is the first digital display to do so.

After calibration, and using a full-field 100-IRE white (107 foot-lamberts) and a full-field 0-IRE black (0.090 ft-L), the contrast ratio was 1,189:1. Using a 16-box checkerboard pattern (ANSI contrast), the contrast ratio was 226:1.—GM