Hewlett-Packard Display Quality Statement; Table 5-1. Omnibook Xe Lcd Guidelines (Tft) - HP omnibook OmniBook XE2 Service Manual

Hewlett-Packard Display Quality Statement

TFT display manufacturing is a high precision but imperfect technology, and manufacturers cannot
currently produce large displays that are cosmetically perfect. Most, if not all, TFT displays will
exhibit some level of cosmetic imperfection. These cosmetic imperfections may be visible to the
customer under varying display conditions and can appear as bright, dim, or dark spots. This issue is
common across all vendors supplying TFT displays in their products and is not specific to the HP
OmniBook display.
HP OmniBook TFT displays meet or exceed all TFT manufacturer's standards for cosmetic quality of
TFT displays. HP does not warrant that the displays will be free of cosmetic imperfections. TFT
displays may have a small number of cosmetic imperfections and still conform to the display
manufacturer's cosmetic quality specifications.
Here are some guidelines to use in determining what action to take on customers' complaints of
cosmetic imperfections in their TFT displays:
1. The unit should be viewed in the customer's normal operating condition.
This means if the customer uses the unit predominately in DOS, in Windows, or in some other
application or combination of applications, that is where you should make the determination. Self
test is not a normal operating condition and is not a sufficient tool to interpret display quality.
2. Use the table below to determine whether the display should be considered for replacement.
These are the only conditions in this guideline that may call for a replacement due to a defect in
material or workmanship based on the HP Limited Warranty Statement.
3. If a display is considered for replacement, it should be clear to the customer that cosmetic
variations on the replacement display may also exist, and may require the customer to use a work-
around to obscure the cosmetic imperfection.
4. Customers with cosmetic-based complaints only, that do not conform to the above conditions and
tests, will not normally be considered for display replacement. It will be left to the judgment of
the HP-responsible person working with the customer, to identify work-arounds that are
reasonable and appropriate for the individual customer. Customers who must have a more perfect
display solution should consider switching to an OmniBook with a DSTN display.
We expect over time that the industry will continue to improve in its ability to produce displays with
fewer inherent cosmetic imperfections, and we will adjust our HP guidelines as the improvements are
implemented.
Type of Imperfection
13.3" TFT, SVGA
Electrical Imperfections:
(a)
Bright dots
(a)
Dark dots

Table 5-1. OmniBook XE LCD Guidelines (TFT)

Imperfections Not Allowed
7 or more single bright dots.
7 or more single dark dots.
3 or more double bright dots.
3 or more double dark dots.
11 or more total bright and dark dot imperfections.
Any occurrence of triple bright dots (or triple dark dots).
Any occurrence of 3 bright dots within 20 mm (or 3 dark dots).