hp L1520/hp L1720/hp L1820 LCD Monitor
LCD Monitor Quality and Pixel Policy for the hp L1520 Monitor
40 English
LCD Monitor Quality and Pixel Policy for the
hp L1520 Monitor
The HP L1520 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 D5063 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 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 D5063 display does not have more than:
• 10 total sub-pixel defects.
• 5 defective red sub-pixels.
• 5 defective green sub-pixels.
• 5 defective blue sub-pixels.
• No more than four pairs of adjacent defective sub-pixels i.e. no
fully defective pixel.
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.
l15_7_820.fm Page 40 Tuesday, June 11, 2002 12:39 PM
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