(KB 94) My N8SE LCD has a dead pixel

At DOMO, we try to qualify under the ISO 13406-2 guidelines.

Pixel Fault Classes

The standard lists four classes of devices, where a device of a specified class may contain a certain maximum number of defective pixels. Three distinct types of defective pixels are described:

  • type 1 = a hot pixel (always on, being colour white)
  • type 2 = a dead pixel (always off, meaning black)
  • type 3 = a stuck pixel (one or more sub-pixels (red, blue or green) are always on or always off)

The table below shows the maximum number of allowed defects (per type) per 1 million pixels.

Definition of Pixel Fault Classes – Maximum number of faults per million pixels

Class

Type 1

Type 2

Type 3

Cluster with more than one type 1 or type 2 faults

Cluster of type 3 faults

I

0 0 0 0 0

II

2 2 5 0 2

III

5 15 50 0 5

IV

50 150 500 5 50

Under ISO 13406-2, the general guideline has been laid that a total of 7 faulty pixels per 1,000,000 are assumed to be okay on an LCD. At DOMO we qualify under Class 2 and assume that the LCD of your device is okay even if there are 7 faulty pixels per 1,000,000.

About Author: kbase-admin
Hello there, I am a senior HelpDesk executive and write KnowledgeBase articles for DOMO Customers. Some think that a support executives job is boring but I kind of love my job :) Thanks to the fun filled environment here, I dont feel like I am in a workplace, rather its more of a fun place. I am always there for customers in need, just a call away!

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