Standards for faulty pixels

2008-12-18 15:57
JW wants to reach an agreement regarding stuck pixels with forum members.
Background by another poster at bbs.meizu.com

Background. In order to satisfy a standard of perfect M8 screens, the production process needs to be refined to a maximum of 2.9 errors per million. This kind of quality is not feasible for civilian use. Most companies aim for three sigma quality (3.4 million errors per million). In the electronic industry the demands are naturally somewhat special and many companies have a six sigma quality goal. Having a goal is not equal to meeting it however, striving for higher quality increases development costs many times over.
Under today's technical conditions, no maker of large displays, except military contractors, will guarantee a product free of faulty pixels.

Let's take a look at how some different companies have approached faulty pixels in their products.

原帖由 诺基亚 于 2008 发表 诺基亚 屏幕亮点 保修么?
出现了5个坏点才能换机

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原帖由 索尼 于 2008 发表 半数PSP屏幕有亮点或坏点 索尼拒绝保修
　在PSP用户手册的第13页上写道“红，蓝，绿点（亮点）或者黑点（坏点）可能会出现LCD屏幕上的某些 位置。对于LCD屏幕来说，出现这些点的是正常 的，不是故障。LCD屏幕是以高精技术制造的。然而，每块屏幕都可能出现少量的坏点或者亮点。”手册上还警 告，在阳光下曝晒或者长时间显示同一幅图片，都 可能会对屏幕造成损坏。

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原帖由 三星手机 于 2008 发表 我的三星手机屏幕有亮点，客服说符合标准，不给换机
规定要4个以上才算质量问题

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原帖由 联想 于 2008 发表 厂商亮点承诺
规范是 亮点+暗点<=6

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原帖由 方正 于 2008 发表 厂商亮点承诺
方正是严格按照国家规定执行

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原帖由 HP 于 2008 发表 厂商亮点承诺
坏点在3个以内，且每平方英寸2个坏点以内属于正常

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原帖由 DELL 于 2008 发表 厂商亮点承诺
戴尔对亮点的规定为8个之内都属于合格

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原帖由 七喜 于 2008 发表 厂商亮点承诺
不超过3个亮点

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原帖由 TCL 于 2008 发表 厂商亮点承诺
不超过5个亮点

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原帖由 东芝 于 2008 发表 厂商亮点承诺
6个之内都属于合格产品

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原帖由 IBM 于 2008 发表 厂商亮点承诺
8个亮点或是8个暗点之内，总共不超过9个，属于正常

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原帖由 国家标准 于 2008 发表 厂商亮点承诺
亮点+暗点《=12 为合格产品

Here it just lists some examples from different companies and their faulty pixel policies to show us that M8 is really great right now...(something like that)

JW: To let customers return M8 because of dead pixels would increase our costs greatly, besides there is an universal industry standard regarding dead pixels. To try to fight this (standard) would be a dead cause and make no business sense! You can't alienate your customers, but to forsake your personal profits or even the company's profits just can't be done. No need to start a company if you do!

Just to clarify, it's within normal standards to have few faulty pixels on the M8, it's not enough cause for compensation (buyback)!

J.Wong says
I'm very grateful that you understand this [common Chinese expression]
Because of pixel problems in the M8 screen and maybe rising costs overall it's not possible to aim for pixelfault free screens. I hope we can take this a step further and reach an universal agreement about the pixel standard together with the forum members.

Maybe it's better to only have English in threads like this and then refer to the translation thread? This way, it's easier for members to find relevant information quickly.

You're probably right. It's more functional like that. I'll edit the post accordingly.