Philips 328B1 31.5" 4K Monitor - Manual (Page 28)

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9. Customer care and warranty
BRIGHT DOT DEFECTS ACCEPTABLE LEVEL
1 lit subpixel 2
2 adjacent lit subpixels 1
3 adjacent lit subpixels (one white pixel) 0
Distance between two bright dot defects* >15mm
Total bright dot defects of all types 3
BLACK DOT DEFECTS ACCEPTABLE LEVEL
1 dark subpixel 5 or fewer
2 adjacent dark subpixels 2 or fewer
3 adjacent dark subpixels 0
Distance between two black dot defects* >15mm
Total black dot defects of all types 5 or fewer
TOTAL DOT DEFECTS ACCEPTABLE LEVEL
Total bright or black dot defects of all types 5 or fewer
Note
1 or 2 adjacent sub pixel defects = 1 dot defect