Philips C221V2SB/01, Руководство по обслуживанию

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0.1
191V2 18.5” LCD Monitor
2009/07/15 PHILIPS 14 of 26
4.4 Brightness uniformity
Set contrast at 100% and turn the brightness to get average above
250 nits
at centre of the screen.
Apply the Fig 1, it should comply with the following formula:
B_min
X 100% > 70 % (Follow panel spec.)
B_max
Where B_max =Maximum brightness
B_min = Minimum brightness
4.5 Check Cross talk (S)
Apply Pattern 2. Set contrast and brightness at 100 %.
Measure YA. Then output Pattern 3 and measure YB.
the cross talk value :
ABS ( YA - YB )
⎯⎯⎯⎯⎯⎯⎯⎯⎯
X 100% < 1.5 %
YA
4.6 White color adjustment
There are three factory preset white color 9300K, 6500 and sRGB
Align by FGA function.
Apply full gray64 pattern, with brightness in 100 % position and the contrast control at
50 % position.
The 1931 CIE Chromaticity (color triangle) diagram (x , y) coordinate for the screen
center should be:
Product specification
CIE coordinats (x,y)
9300K x = 0.283 ± 0.02
y = 0.297 ± 0.02
6500K/sRGB x = 0.313 ± 0.02
y = 0.329 ± 0.02
sRGB x = 0.313 ± 0.02
y = 0.329 ± 0.02