Policy on defective pixel on LCD display

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An introduction to LCD display pixels

LCD displays are made up of a set number of pixels and each pixel is made from 3 sub-pixels - one Red, one Green and one Blue. Each sub-pixel has its own transistor, which makes manufacturing the glass substrate very complex.

Due to the nature of the manufacturing process, occasional defects can occur. Pixel defects or failures cannot be fixed or repaired and can happen at any stage in the LCD panel life. To regulate the acceptability of defects and to protect the end user, ISO has created a standard for manufacturers to follow. ISO-9241-302, 303, 305, 307:2008 recommends how many defaults are acceptable on a display before it should be replaced, within the terms & conditions of warranty. We as manufacturer of the brands CTOUCH, i3TOUCH and i3CONNECT devices, conform to and support the ISO-9241-307 standard.

There are three types of pixel defects covered under ISO-9241-307:

• Type 1 - Bright Pixel: A pixel is displayed as a small white dot on a black pattern.

• Type 2 - Dark Pixel: A pixel is displayed as a small black dot on a white pattern.

• Type 3 - Stuck on sub-Pixel: A sub-pixel (red, blue or green) is always on, always off or partially bright.

One Pixel = 3 Sub-Pixels

Maximum number of defect allowed per million pixels

The table below shows the maximum number of allowed defects for each resolution per 1 million pixels according to ISO-9241-307.

Dead Pixel Warranty Policy

The table below shows the allowable number of dead sub-pixels for the native resolution of the LCD panel. Your display can be replaced during the duration of the limited warranty period if the number of dead pixels is greater than the allowable number.

Maximum number of defects allowed re-calculated based on resolution

Panel specific policy re-calculated according to ISO-9241-307 Class I.