Operation Manual

Working with the Tablet PC
Touchscreen
Tou chs cr ee nNotes
High-quality TFT displays are installed in Tablet PCs from Fujitsu Technology Solutions GmbH. For
technical reasons, TFT monitors are man ufactured for a specific resolution. An op timal, clear
picture c an only be ensured with the correct resolution intended fo r the relevant TFT monitor. A
monitor resolution which differs from the specification 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 con stan t lit or unlit pixels (picture elements) may be present. The maximum
permitted number of pixels fa ults is stipulated in the i nterna tional standard ISO 9241-3 (Class II).
Example:
A monitor with a resolution of 1280 x 800 has 1280 x 800 = 1024000 pixels. E ach pixel consists of
three subpixels (red, green and blue), so there are almost 3 million subpixels in to tal. 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 c orresponding mix may be defective (1 light subpixel c oun ts as 2 dark su bpixels).
Pixel
A pixel consists of 3 subpixels, no rmally red, green and
blue. A pixel is the smallest element that can be g enerat ed
by complete functionality of the display.
Subpixel
A subpixel is a separately addressable internal structure
within a pixel that en hances the pixel function.
Cluster A c luste r contain
s two or more defective pixels or
subpixels in a 5 x
5 pixel block.
Background light ing
TFT monitors are operated w ith background lighting. The luminosity of the
background lighting can decrease while the Tablet PC is in u se. However, you
can set the brightness of your monitor individually.
20 Fujitsu