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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 can guarantee 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. 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 or claim
will be denied.
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.
5.1. 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.
5.2. 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,
specifications define the
minimum distance
between dark dots
5.3. Proximity of Pixel Defects
Because pixel and sub-pixel defects of the same type that are nearby one another may be more
noticeable, there are specific 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
