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5.
Pixel Defect Policy
We strive to deliver the highest quality products and use some of the industry’s most advanced manufacturing
processes whilst practicing stringent quality control. However, pixel or sub-pixel defects on the PDP / TFT panels used
in Plasma- & LCD- displays are sometimes unavoidable. No manufacturer can guarantee that all panels will be free from
pixel defects, but guarantees that any Plasma- & LCD- displays with an unacceptable number of defects will be repaired
during the warranty period in line with your local warranty.
This notice explains the different types of pixel defects and defines the acceptable defect level for the LCD screen. In
order to qualify for repair under warranty, the number of pixel defects must exceed a certain level as shown in the
reference table. If the LCD screen is within specification a warranty exchange / claim back will be refused.
5.1. Pixels and Subpixels
A pixel, or picture element, is composed of three sub-pixels in the primary colors of red,
green and blue. Many pixels together form an image. When all sub-pixels of a pixel are lit, the
three colored sub-pixels together appear as a single white pixel. When all are dark, the three
colored sub-pixels together appear as a single black pixel. Other combinations of lit and dark
sub-pixels appear as single pixels of other colors.
5.2. Types of Pixel D Dot Definition
Pixel and sub-pixel defe
cts appear on the screen in different ways. There are three categories of pixel defects and
several types of sub-pixel defects within each category.
Dot definition = What is a defective “Dot”?
One or more defective, adjacent sub-pixel are defined
as one “dot”. The number of defective sub-pixels are
not relevant to define a defective dot. This means
that a defective dot can consist of one, two or three
defective sub-pixels which can be dark or lit.
One dot = One Pix
el; consists of
three sub-pixels of Red, Green, and
Blue.
5.3. Dark Dot Defects
Black dot defects appear as pixels or sub-pixels that are always dark or “off.” These are the examples of black dot
defects:
One dark dot
Two adjacent dark dots =
1 pair of dark dots
Two dark dots,
specifcations defnes the
minimum distance
between dark dots
5.4. Proximity of Pixel Defects
Because pixel and
sub-p
ixels defects of the same type that are nearby one another may be more noticeable, specifies
tolerances for the proximity of pixel defects. In the table below you can find specifications about:
• Allowed amount of adjacent dark dots = (adjacent dark dots = 1 pair of dark dots)
•
Minimum distance between dark dots
•
Total number of all defective dots
