Table 2. This policy applies for HP monitors manufactured in May 2009 or later:

Bright sub-pixel defects:

2 maximum

Dark sub-pixel defects:

5 maximum

 

 

Total sub-pixel defects:

5 maximum

Full pixel defects:

0 allowed

Note: the date of manufacture is on the label on the back of the HP monitor.

As a result of these tight specifications, the majority of all HP monitors are shipping with no pixel defects at all (per HP’s internal audits), and a small percentage with only a single sub-pixel defect. Most remaining units are shipping with only a few pixel defects that fall within the above listed range of acceptable pixel defects.

International standards (ISO-9241)

The International Standards Organization (ISO) has published its own set of specifications for pixel defects, contained within the ISO 9241 set of standards.. These identify three classes for measuring pixel defects in flat panel monitors:

∙Class 0 panels are completely defect-free, including no full pixel or sub-pixel defects.

∙Class 1 panels permit any or all of the following:

⎯1 full bright (“stuck on”) pixel

⎯1 full dark (“stuck off”) pixel

⎯2 single or double bright or dark sub-pixels

⎯3 to 5 “stuck on” or “stuck off” sub-pixels (depending on the number of each)

∙Class 2 panels permit any or all of the following:

⎯2 full bright pixels

⎯2 full dark pixels

⎯5-10 single or double bright or dark sub-pixels (again, depending on the number of each; no more than 5 bright (“stuck on”) subpixels are permitted).

∙Class 3 panels permit any or all of the following:

⎯5 full bright pixels

⎯15 full dark pixels

⎯50 single or double sub-pixels stuck on or off

The HP specification ensures that all of our products exceed the ISO Class 2 requirements, as no full pixel defects are ever permitted; in most cases, HP displays will meet the more stringent Class 1 specification. As mentioned earlier, the HP specifications dictate no full pixel defects; further, we require no double sub-pixel

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