Brightness Uniformity; Check Cross Talk (S); White Color Adjustment - Philips 150S8FB/00 Service Manual

HUDSON 8
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4.4 Brightness uniformity

Set contrast at 100% and turn the brightness to get average above 200 nits at centre of the screen.
Apply the Fig 1, it should comply with the following formula:
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 :

4.6 White color adjustment

There are three factory preset white color 9300K, 6500K, sRGB.
Apply full white 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 spec.
9300K CIE coordinates
6500K/ sRGB CIE coordinates
sRGB CIE coordinates
Production alignment spec.
9300K CIE coordinates
6500K/ sRGB CIE coordinates
sRGB CIE coordinates
Quality Inspection spec.
9300K CIE coordinates
6500K/ sRGB CIE coordinates
sRGB CIE coordinates
B_min
B_max
ABS (YA - YB)
⎯⎯⎯⎯⎯⎯⎯⎯⎯
YA
X = 0.283 ± 0.02
Y = 0.297 ± 0.02
X = 0.313 ± 0.02
Y = 0.329 ± 0.02
X = 0.313 ± 0.02
Y = 0.329 ± 0.02
X = 0.283 ± 0.005
Y = 0.297 ± 0.005
X = 0.313 ± 0.005
Y = 0.329 ± 0.005
X = 0.313 ± 0.005
Y = 0.329 ± 0.005
X = 0.283 ± 0.015
Y = 0.297 ± 0.015
X = 0.313 ± 0.015
Y = 0.329 ± 0.015
X = 0.313 ± 0.015
Y = 0.329 ± 0.015
X 100% >75%
X 100% < 1.5 %