TFT Dead Pixel Check
TFT Monitors are made up of many pixels. Each Pixel has 3 sub-pixels, red, green and blue. Each sub-pixel has its own transistor. A typical 1920 x 1200 monitor will have 2,304,000 pixels and (multiply by 3), 6,912,000 transistors. As there are so many transistors, producing a TFT Monitor is a highly complex process, and as a result defects can occur.
These defects result in dead pixels, stuck pixels, bruises and poor refresh rates. They are not repairable or desireable but as you will read below, acceptable.
To regulate the acceptability of defects and to protect the end user, ISO have created a standard for manufacturers to follow. ISO-13406-2 recommends how many pixel faults are acceptable before a panel can be replaced. ISO 13406-2 recommends how many defaults are acceptable in a display before it should be replaced, within the terms & conditions of warranty or returned. Class II is the common class for consumer equipment. Class I is for Military, Hospital or other Critical applications.
All monitors sold by UK Gaming Computers adhere to the ISO 13406-2 Spec in Class II requirements as standard.
The table below shows the allowable number of malfunctioning pixels that are acceptable, depending on the native resolution of the LCD and allowing for 2 malfunctioning pixels per million pixels.
| Native resolution | No. of pixels | No. of million pixels | Acceptable defects |
| 1024 x 768 | 786,432 | 0.8 | 2 |
| 1280 x 1024 | 1,310,720 | 1.3 | 3 |
| 1600 x 1200 | 1,920,200 | 1.9 | 4 |
| 2048 x 1536 | 3,145,728 | 3.1 | 6 |
The table below shows the allowable number of malfunctioning sub-pixels that are acceptable, depending on the native resolution of the LCD and allowing for 5 malfunctioning sub-pixels per million pixels.
| Native resolution | No. of pixels | No. of million pixels | Acceptable defects |
| 1024 x768 | 786,432 | 0.8 | 4 |
| 1280 x 1024 | 1,310,720 | 1.3 | 7 |
| 1600 x 1200 | 1,920,200 | 1.9 | 10 |
| 2048 x 1536 | 3,145,728 | 3.1 | 16 |
The table below shows the allowable number of malfunctioning sub-pixels that are acceptable within a 5 x 5 block of pixels, depending on the native resolution and allowing for 2 malfunctioning sub-pixels within a 5 x 5 block, per million pixels.
| Native resolution | No. of pixels | No. of million pixels | Acceptable defects |
| 1024 x 768 | 786,432 | 0.8 | 2 |
| 1280 x 1024 | 1,310,720 | 1.3 | 3 |
| 1600 x 1200 | 1,920,200 | 1.9 | 4 |
| 2048 x 1536 | 3,145,728 | 3.1 | 6 |
The above is relevant to Class II LCD panels.
For some users, they may not be able to live with these parameters and thus we offer a service to check a screen(s) before its shipped to ensure they are entirely defect free.
Dead Pixel Check (4k)
We believe that having the odd dead pixel can ruin your monitor experience, so we offer a dead pixel check. This means when you place your order, your allocated monitor is tested for dead pixels, stuck pixels, bruises and poor refresh rates. If any defects are found, that includes 1 dead pixel, then you are reallocated another monitor which proceeds through the process once again. In other words your monitor(s) will arrive 100% defect free!
Due to the nature of the product, we cannot guarantee the screen will not develop dead pixels in the future.
Dead Pixel Check (1440p)
We believe that having the odd dead pixel can ruin your monitor experience, so we offer a dead pixel check. This means when you place your order, your allocated monitor is tested for dead pixels, stuck pixels, bruises and poor refresh rates. If any defects are found, that includes 1 dead pixel, then you are reallocated another monitor which proceeds through the process once again. In other words your monitor(s) will arrive 100% defect free!
Due to the nature of the product, we cannot guarantee the screen will not develop dead pixels in the future.
Dead Pixel Check (1080p)
We believe that having the odd dead pixel can ruin your monitor experience, so we offer a dead pixel check. This means when you place your order, your allocated monitor is tested for dead pixels, stuck pixels, bruises and poor refresh rates. If any defects are found, that includes 1 dead pixel, then you are reallocated another monitor which proceeds through the process once again. In other words your monitor(s) will arrive 100% defect free!
Due to the nature of the product, we cannot guarantee the screen will not develop dead pixels in the future.
