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5-4 Reference Information Service Manual
Table 5-1 LCD Guidelines
Type of Imperfection Imperfections Not Allowed
Electrical Imperfections:
Bright dots
(a)
Dark dots
(a)
• 7 or more single bright dots
• 7 or more single dark dots
• 9 or more total (bright and dark combined) defective dots
• Any occurrence of multiple defective dots within 15 mm
Mechanical Imperfections:
Discoloration
Polarizer bubbles, dents
(b)
• Any polarizer bubble, discoloration, or dent that is visible from at least 36
cm (14 in)
Definitions of imperfections:
a
Bright or dark dot: a subpixel (red, green, or blue dot) that is stuck on or off.
b
Polarizer dent or bubble: a light spot with a darker border that appears on a lighted display and does not
change size (In contrast, a polarizer scratch is a light line that is visible on a darker background and
does not change size)