Philips Brilliance 190SW9FB/27, Servise Manual

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HUDSON 9
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4.2 Brightness
To follow Panel specification..
4.3 Image size
Actual display size: Refer to 2.1 LCD PANEL spec.
4.4 Brightness uniformity
Set contrast at 100% and turn the brightness to get average above 300 nits at centre of the screen.
Apply the Fig 1; it should comply with the following formula:
B_min
X 100% >75% (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 11500K, 9300K, 8200K, 7500K, 6500K, sRGB and 5000K 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 coordinates (x,y)
11500K
x = 0.270 ± 0.02
y = 0.281 ± 0.02
9300K
x = 0.283 ± 0.02
y = 0.297 ± 0.02
8200K
x = 0.291 ± 0.02
y = 0.306 ± 0.02
7500K
x = 0.298 ± 0.02
y = 0.314 ± 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
5000K
x = 0.345 ± 0.02
y = 0.357 ± 0.02