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ViewSonic Corporation
Confidential - Do Not Copy
Q9b-2
17
3.7 Brightness Uniformity and Contrast Ratio
a.
Brightness Uniformity:
128 640 1152
Bmax = MAX (B
A
, B
B
, B
C
, B
D
, B
E
)
Bmax - Bmin
Bmin = MIN (B
A
, B
B
, B
C
, B
D
, B
E
)
Bmax
Bave = AVE (B
A
, B
B
, B
C
, B
D
, B
E
)
b.
Contrast Ratio:
The contrast ratio is measured at point A and calculated by using the following formula
Luminance with all pixels in white
Contrast ratio (CR)
=
≧
200
(
According to
HANNSTAR
Luminance with all pixels in black
HSD190ME13-A02
)
3.8 Shipping Luminance
a. Condition Input signal : Full white pattern
Controls
: Color temperature of Office
Cont./Brt.
: Default value
Measurement point
: One point at the center of the picture.
Warm-up time : 30 minutes.
Color analyzer : CA-210
c.
Shipping luminance (center)
Shipping Luminance
Color Temperature
19”
Native
≧
200 cd /
㎡
3.9 Maximum / Minimum Luminance
a. Condition Input signal : Full white pattern (Primary mode)
Measurement point : Center of LCD screen
Color Analyzer : CA-210
Maximum : BRT
→
Max.
CONT
→
Max.
≦
20%
B
E
A
C
D
102
512
922
Summary of Contents for Q9B-2 - Optiquest Q9b - 19" LCD Monitor
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