HP (Hewlett-Packard) X20LED User Manual

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 22
LCD Monitor Quality and Pixel Policy
Your LCD Monitor uses high-precision technology, manufactured according to high 
standards, to help 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 your LCD Monitor. These imperfections are caused by one or more 
defective pixels or subpixels.
A pixel consists of one red, one green, and one blue subpixel. 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 
subpixel (dot defect) is less visible than a defective whole pixel, and is small and only 
visible on a specific background.
To locate defective pixels, the monitor should be viewed under normal operating 
conditions and in normal operating mode at a supported resolution and refresh rate, 
from a distance of approximately 50 cm (16 inches). We expect that, over time, the 
industry will continue to improve its ability to produce displays with fewer cosmetic 
imperfections, and we will adjust guidelines as improvements are made. For more 
information about your LCD Monitor, refer to the HP Web site at: 
http://www.hp.com/support .