BenQ DLP PROJECTOR PE8700 - Manual (Page 11)

10
A2. BRIGHTNESS UNIFORMITY
Unit: %
Brightness: Default
Contrast:
Default
Uniformity =
9
9 8 7 6 5 4 3 2 1
) 13 , 12 , 11 , 10 (
L L L L L L L L L
E E E E MIN
+ + + + + + + +
1/20h
1/20w
E10
E12
E11
E13
L5
A3. BRIGHTNESS DIFFERENCE
Unit: %
Brightness: Default
Contrast: Default
Brightness Difference=
9
9 8 7 6 5 4 3 2 1
)) 13 , 12 , 11 , 10 ( ) 13 , 12 , 11 , 10 ( (
L L L L L L L L L
E E E E MIN E E E E MAX
+ + + + + + + +
−
A4. ANSI CONTRAST
Unit: Contrast : 1
Brightness: Default
Contrast: Default
Contrast Ratio shall be determined from illuminance values obtained from a
black-and-white ”chessboard” pattern consisting of 16 equal rectangles. The
white rectangles shall be at 100% gray and the black rectangles at 0% gray.
Illuminance measurements shall
be made at the center of each of the rectangles.
Contrast Ratio = Average lux value of the white rectangles/Average lux value
of the black rectangles