Touchscreen/Lcd Screen Without Touch Function (Device-Dependent) - Fujitsu Lifebook U904 Operating Manual

Working with the notebook
Touchscreen/LCD screen without touch
function (device-dependent)
Notes LCDscreen
High-quality LCD screens (TFT) are installed in Fujitsu notebooks. For technical reasons,
these screens are manufactured for a certain resolution. An optimum and sharp image can
only be ensured with the resolution intended for the particular screen. A screen resolution
which differs from the specification can result in an unclear picture.
The resolution of your notebook's screen 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 may be present. The maximum permitted number of such
faulty pixels is specified in the international standard ISO 9241-307 (Class II).
Example:
A screen 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
9241-307 (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 dark subpixels) are allowed to be defective.
Pixel
Subpixel
Cluster
Background lighting
LCD screens are operated with background lighting. The luminosity of the background
lighting can decrease during the period of use of the notebook. However, you
can set the brightness of your screen individually.
Synchronising the display on the LCD screen and an external monitor
For more information, please refer to the chapter
under "Display output, switch between".
26
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.
A subpixel is a separately addressable internal structure
within a pixel that enhances the pixel function.
A cluster contains two or more defective pixels or
subpixels in a 5 x 5 pixel block.
"Key combinations", Page 22
Fujitsu