Definition Of Pixel Defects - Philips HP L1530R Service Manual

Definition of pixel defects

HP L1530R 13
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LCD Monitor Quality and Pixel Policy:
The TFT monitor uses high-precision technology, manufactured according to HP
standards, to guarantee trouble-free performance. Nevertheless, the display may have cosmetic imperfections that appear
as small bright or dark spots. This is common to all LCD displays used in products supplied by all vendors and is not
specific to the HP LCD.These imperfections are caused by one or more defective pixels or sub-pixels.
A pixel consists of one red, one green, and one blue Sub-pixel.
A defective whole pixel is always turned on (a bright spot on a dark background), or it is always off (a dark spot on a bright
background). The first is the more visible of the two.
A defective sub-pixel (dot defect) is less visible than a defective whole pixel and is small and only visible on a specific
background.
The HP display does not have more than:
3 bright dots.
5 dark dots.
5 total bright and dark dots.
No more than two adjacent (less than 2.5 mm edge-to-edge) defective pixels.
To locate defective pixels, the monitor should be viewed under normal operating
conditions, in normal operating mode at a supported resolution and refresh rate, from a distance of approximately 50 cm
(16 in.).
HP expects that, over time, the industry will continue to improve its ability to produce LCDs
with fewer cosmetic imperfections and HP will adjust guidelines as improvements are made.