Working with the Tablet PC
Touchscreen
Tou ch sc re e nNotes
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 r esolution intend ed for the particular screen. A screen resolution
which differs from the specification can result in an unclear picture.
The s creen resolution of your Tablet PC’s touchscreen is optimally set at the fa ctory.
Current production technology cannot guarantee a n absolutely fault-free screen display. A few
isolated constantly lit or unlit pixels (picture elements) may be present. The maximum permit ted
number of such faulty pixels is spe ci fied in the international standard ISO 9241-3 07 (Class II).
Example:
A screen with a resolution of 1280 x 800 has 1280 x 800 = 102400 0 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 II), 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 d ark 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 s ubpixel is a separately addressable internal structure
within a pixel t hat enhances the pixel function.
Cluster A cluster contain
s 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 o f the background
lighting can decrease over the period of use of the Tablet PC . However, you can
set the brightness of your screen manually.
Ambient light sen sor
If your Tablet PC was shipped with the Windows opera ting system, the screen brightness is
regulated by means of the ambient light sensor and depending on the respective light conditions.
This results in optimum readability and longer battery life at the same time.
If your Tablet PC was shipped with Windows 8.1, the adapt ive brightness setting is deact ivated. To
change the ambient light sensor sett ings, select Control Panel - System and Security - Power Options -
Change p la n settings - Change advanced power s ettin gs - D ispla y - Activate adaptive brightness setting..
Select On to activate the adaptive brightness setting with the help of the ambient light sensor.
Synchronizing the d ispla y o n the touchscreen and an external monitor
In Wind ows 8.1 wipe your finger over the screen from the right-hand edge. The setting
Charms - Devices - S econd monitor opens. Select the desired output type.
You can also use the Fujitsu Display Ma na ger in the Windows Mobility Cente r to set the output typ e.
24 Fujitsu
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