445N
34
8. Screen and Faceplate Blemishes
8.1. Definitions of inspection conditions and terms
8.1.1. Standard observing condition
Distance: 30 cm from screen face. Angle
45
from Z axis.
Cosmetic inspection without raster should be done under luminance: 500lx MIN.
8.1.2. Zone division
302.2 mm
302.
2
m
m
A
B
other screen area
8.1.3. Minimum distance beetween defects
8.1.4. Average diameter of defect
Average diameter =
Long di Short diameter
2
8.2. Face defect standard (black spot, stain)
Average diameter Quantity allowed
Minimum
of defects
A
B
Total
distance
less than 0.5
4
4
6
30
less than 0.3
no limit
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