Industrial Electronic Engineers, Inc.
SIZE
A
CODE IDENT NO.
05464
S03875–21–0214
Van Nuys, California
SCALE N/A
REV A
SHEET 21
–X
+X
–Y
+Y
Normal
φ
= +90º
φ
1
φ
2
φ
= –90º
Figure 13
Definition of Vertical Viewing Angle
Definition of Horizontal Viewing Angle–top Viewing Display (for Bottom Viewing Displays
φ
= –20°
Typically)
–X
+X
–Y
+Y
Normal
φ
= +20º
+
θ
–
θ
θ
= –90º
θ
= +90º
Figure 14
Definition of Horizontal Viewing Angle
Display contrast ratio is given by:
CR
B
B
=
2
1
Where: B
1
= Brightness of selected segment
B
2
= Brightness of non–selected segment
