User's Manual

Working with the Tablet PC
Touchscreen
High-quality LCD screens (TFT) are installed in Fujitsu Tablet PCs. For technical reasons,
these screens are manufactured for a specific resolution. An optimal, clear picture can
only be ensured in the resolution intended for the particular screen. A screen 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.
Current production technology cannot guarantee an absolutely fault-free screen display. A few
isolated constantly lit or unlit pixels (picture elements) may be present. The maximum permitted
number of such faulty pixels is specified in the international standard ISO 9241-307 (Class 2).
Example:
A monitor with a resolution of 1,280 x 800 has 1,280 x 800 = 1,024,000 pixels. Each pixel consists of
three subpixels (red, green and blue), so there are almost 3 million subpixels in total. According to ISO
9241-307 (class 2), a maximum of 2 light and 2 dark pixels and in addition 5 light or 10 dark subpixels
or an equivalent mix (1 light subpixel counts as 2 dark subpixels) are allowed to be defective.
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
LCD screens are operated with background lighting. The luminosity of the background
lighting can decrease over the period of use of the Tablet PC. However, you can
adjust the brightness of your monitor yourself.
Ambient light sensor
If your notebook was shipped with the Windows operating system, the screen brightness is
regulated by the ambient light sensor and is dependent on the particular light conditions.
This results in optimum readability and longer battery life at the same time.
If your notebook was shipped with Windows 8.1, the adaptive brightness setting is deactivated. To
change the ambient light sensor settings, select Control Panel - System and Security - Power Options -
Change plan settings - Change advanced power settings - Display - Activate adaptive brightness setting..
Select On to activate the adaptive brightness setting with the help of the ambient light sensor.
Synchronizing the display on the touchscreen and an external monitor
In Windows 7, you can switch between touchscreen and external monitor, if you open
Control Panel - Windows Mobility Center, section External Display.
In Windows 8.1 wipe your finger over the screen from the right-hand edge. The setting
Charms - Devices - Second monitor opens. Select the desired output type.
You can also use the Fujitsu Display Manager in the Windows Mobility Center to set the output type.
Fujitsu 27