ISO 9241-302, 303, 305 and 307:2008

(norma aplicada a nuevos monitores como el NEC PA)

ISO 9241-3

(1993) Visual display requirements This part specifies the ergonomics requirements for display screens which ensure that they can be read comfortably, safely and efficiently to perform office tasks. Although it deals specifically with displays used in offices, it is appropriate to specify it for most applications that require general purpose displays to be used in an office-like environment.

ISO-9241-302, 303, 305, 307:2008 pixel defects

Of particular interest to the lay computer user are the definitions of flat-panel TV and monitor pixel defects provided in the ISO-9241-3xx series of standards (which obsoletes ISO 13406-2). 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 white”) 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

As of 2010, most premium branded panel manufacturers specify their products as Class 0, expecting a small number of returns due to early failure where a particular item fails to meet Class 0 but would meet Class 1. Budget panel manufacturers tend to specify their products as Class 1[citation needed]. Most premium branded finished product manufacturers (retail TVs, monitors, Laptops, etc) tend to specify their products as meeting Class 1 even when they have a Class 0 specified panel inside. Some premium branded finished product manufacturers have started to specify their products as Class 0 or offer a Class 0 guarantee for an additional premium.[1][2][3]

http://en.wikipedia.org/wiki/ISO_9241#ISO-9241-302.2C_303.2C_305.2C_307:2008_pixel_defects