In this article we are going to explore the impact of ISO 13406-2 in our current society. From its origin to its evolution, ISO 13406-2 has played a key role in different aspects of our daily lives. Throughout history, ISO 13406-2 has been a source of debate and interest, awakening passions and generating reflections on its influence in various areas. Through this article, we will analyze the relevance of ISO 13406-2 today and how it has shaped our perceptions, behaviors and decisions. In addition, we will examine different perspectives regarding ISO 13406-2, presenting a comprehensive and critical vision that invites reflection and deep analysis of its role in our society.
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (September 2010) |
ISO 13406-2 is an ISO standard, with the full title "Ergonomic requirements for work with visual displays based on flat panels -- Part 2: Ergonomic requirements for flat panel displays". It is best known to end consumers for defining a series of flat-panel display "classes" with different numbers of permitted defects (or "dead pixels"). ISO 13406-2 also provides a classification of Viewing Direction Range Classes and Reflection Classes.
As part of an ISO standard, the classes are guidelines, and not mandatory. Where implemented, the interpretation of the standard by the panel or end product manufacturer and effects in terms of labeling of products, what class of panel is used, etc., can vary. Most flat-panel makers use this standard as the excuse for not accepting returns of defective flat-panels. Many customers argue that it's not honest in the makers' part to sell a product that most people wouldn't accept if they knew it had these defects. Also, there is little offer of Class I panels, that added to the fact that the price of these models is usually very high, make it difficult to buy a totally guaranteed product. One solution to this problem would be to sell these defected panels at a lower price than normal ones, clearly indicating the presence of such defects.
The ISO 13406-2:2001 standard has been withdrawn and revised by the ISO 9241-302, 303, 305 and 307:2008 standards.
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:
The table below shows the maximum number of allowed defects (per type) per 1 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 |
As of 2007, most manufacturers specify their products as Pixel Fault Class II.