Two adjacent lit subpixels: - Red + Blue = Purple Three adjacent lit subpixels (one - Red + Green = Yellow white pixel) - Green + Blue = Cyan (Light Blue)
Black Dot Defects Black dot defects appear as pixels or subpixels that are always dark or "off". These are the types of black dot defects:
One dark subpixel
Two or three adjacent dark subpixels
Proximity of Pixel Defects
Because pixel and subpixels defects of the same type that are nearby one another may be more noticeable, Philips also specifies tolerances for the proximity of pixel defects.
Pixel Defect Tolerances
In order to qualify for repair or replacement due to pixel defects during the warranty period, a TFT LCD panel in a Philips flat panel monitor must have pixel or subpixel defects exceeding the tolerances listed in the following tables.
BRIGHT DOT DEFECTS MODEL 1 lit subpixel 2 adjacent lit subpixels 3 adjacent lit subpixels (one white pixel) Distance between two bright dot defects* 150P2 0 0 150B2 0 0
ACCEPTABLE LEVEL 150S2 8 or fewer 3 or fewer 170B2 4 or fewer 2 or fewer 170S2 8 or fewer 2 or fewer 180P2 3 or fewer 2 or fewer
0
0
1 or fewer
0
0
0
0
0
15 mm or more
15 mm or more
15 mm or more
15 mm or more
file:///D|/Grace/K1/english/170b2b/product/pixel.htm (2 of 3) [11/22/2001 1:32:17 PM]
