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Working with the Tablet PC
Touchscreen
Touchscreen Notes
High-quality TFT displays are installed in Tablet PCs from Fujitsu Technology Solutions GmbH. For
technical reasons, TFT monitors are manufactured for a speci
fi c resolution. An optimal, clear
picture can only be ensured with the correct resolution intended for the relevant TFT monitor. A
monitor resolution which differs from the speci
fi cation can result in an unclear picture.
The screen resolution of your Tablet PC’s touchscreen is optimally set at the factory.
The standard of production techniques today cannot guarantee an absolutely fault-free screen
display. A few isolated constant lit or unlit pixels (picture elements) may be present. The maximum
permitted number of pixels faults is stipulated in the international standard ISO 9241-3 (Class II).
Example:
A monitor with a resolution of 1280 x 800 has 1280 x 800 = 1024000 pixels. Each pixel consists of
three subpixels (red, green and blue), so there are almost 3 million subpixels in total. According to
ISO 9241-3 (class II), a maximum of 2 light and 2 dark pixels and an additional 5 light or 10 dark
subpixels or a corresponding mix may be defective (1 light subpixel counts as 2 dark subpixels).
Pixel A pixel consists of 3 subpixels, normally red, green and
blue. A pixel is the smallest element that can be generated
by complete functionality of the display.
Subpixel A subpixel is a separately addressable internal structure
within a pixel that enhances the pixel function.
Cluster A cluster contains two or more defective pixels or
subpixels in a 5 x 5 pixel block.
Background lighting
TFT monitors are operated with background lighting. The luminosity of the
background lighting can decrease while the Tablet PC is in use. However, you
can set the brightness of your monitor individually.
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