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LED LCD TV Pixel Faults
Despite the most modern production
methods, the highly complex
technology involved in producing this
type of device means there may be
individual or multiple pixel drop-outs
(dead pixels). This is rare, however.
For active matrix TFTs with a resolution
of
1920 x 1080 pixels
, which are each
made up of three sub-pixels (red, green,
blue), there are a total of
approx. 6.2
million
control elements in use.
Occasionally one or more pixels can fail
or become incorrectly controlled
because of this very high number of transistors and the associated extremely complex
manufacturing processes used.
Description Accepted
number
Bright sub-pixel
1 sub-pixel
2
Two adjacent
(horizontal/vertical)
1
3 adjacent
(horizontal/vertical)
0
Separation
Minimum distance between bright and
dark sub-pixels
15 mm
Dark sub-pixel
Single
5
2 adjacent
2
3
1
Separation
Minimum distance between bright and
dark sub-pixels
15 mm
Total number of bright and dark sub-pixels
5
The table describes the maximum number of pixel failures allowed on the screen, without a
warranty claim arising.
A warranty claim can be made in some cases if the above number of defects in a category is
exceeded.