Acer AL1714 - Page 10

Note (1) Definition of Viewing Angle (θx, θy):
12 o’clock direction
θ
y+ = 90º
6 o’clock
θ
y- = 90º
θ
x-
θ
x
+
θ
y-
θ
y+
x-
y+
y-
x+
θX- = 90º
θX+ = 90º
Normal
θx = θy = 0º
Note (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:
Horizontal Line Number
640320
0
1280
960
Active area
768
512
256
0
: test point
X=1 to 5
X
4
3
21
5
Vertical Line Number
1024
Horizontal Line Number [pixel]
10