Philips 498P9Z 48.8" 1440p HDR Curved Monitor - Manual (Page 27)

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6. 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
Total bright dot defects of all types 3
BLACK DOT DEFECTS ACCEPTABLE LEVEL
1 dark subpixel 5 or fewer
2 adjacent dark subpixels 5 or fewer
3 adjacent dark subpixels 1
Distance between two black dot defects* >=15mm
Total black dot defects of all types 10 or fewer
TOTAL DOT DEFECTS ACCEPTABLE LEVEL
Total bright or black dot defects of all types 10 or fewer
Note
1 or 2 adjacent sub pixel defects = 1 dot defect