Acer AL1703 Service Manual page 10

(2) Definition of Contrast Ratio (CR):
The contrast ratio can be calculated by the following expression and figure
below.
Contrast Ratio (CR) = L255 / L0
L255: Luminance of gray level 255
L 0: Luminance of gray level 0
CR = CR (5)
CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note
(5).
Definition of luminance measured points and Brightness Uniformity:
256
512
768
1024
Luminance of center point: L=L(5)
Brightness Uniformity Measurement points: Five specified points 1-5
Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4),
L (5)]
(3) Definition of Response Time (T
100%
90%
Optical
10%
Response
0%
Horizontal Line Number
0
320
0
1
3
Horizontal Line Number [pixel]
, T
R
Gray Level 255
T
R
10
640
960
2
5
4
Active area
):
F
Gray Level 255
Gray Level 0
1280
: test point
X
X=1 to 5
T
F Time