8
HMI (human machine interface)
3 Product description
Instruction book, IQAN-MD4
Landscape and Portrait mode, Polarization
The MD4 software supports both landscape (default) and portrait mode orientation.
The MD4-7 (7") screen has polarizers, and the display component is defined as
landscape mode display. In an application where the MD4-7 is used in portrait mode,
and when wearing polarized sunglasses, the effect is that the screen can be unreadable
due to the conflicting polarizations. This is easily solved by applying a film to the
display. One type of film that is proven to work is NuShield DayVue anti-reflective
overlay film.
The MD4-5 and MD4-10 screens do not have polarizers.
Scratch resistance
In order to maximize the life cycle of the optical performance of the display, the glass
surface does not have any anti-reflection treatment. Such surface treatments have a
tendency to mechanically wear down over time and would give a worn out appearance
of the display and a reduced optical performance.
Maintenance
Reasonable care should be taken to maintain the glass.
The display can be cleaned with an LCD cleaning solution found in many stores. Use a
lightly dampened lint-free, non-abrasive cloth when cleaning the display.
N
OTICE
To avoid scratches, do not wipe or clean a dry display.
Water
IQAN-MD4 is a hardened module suitable for both in-cab and outdoor use.
The display will not be damaged by water, but the touch sensor has been tuned to
reduce the risk of unintentional activation of buttons from water drops. The touch
interface can have limited functionality if an excessive amount of water droplets
remain on the screen. If the MD4 display is placed in exposed locations where water
spray can hit the display, additional splash protection could be used.
N
OTICE
It is recommended to place the display in a vertical position so that water droplets that
hit the display roll off the display glass.
Brightness
The brightness is easily adjusted by pressing the 'menu' touch button and following the
prompts to the backlight settings section. The backlight is automatically dimmed at
supply voltage <14V.
Image persistance
The IQAN-MD4 TFT LCD, like all other LCD screens, can show image persistence,
also known as image sticking, if the same pattern is left on the display for extended
periods of time.
N
OTICE
To avoid the possibility of image sticking in applications where the display is rarely
powered down, a screen saver that alters the display image could be used.
