Psion Teklogix Vehicle-Mount Computer 8590 - Manual (Page 55)

8580/8590 Vehicle-Mount Computer User Manual 29
Chapter 2: Basic Checkout
Protecting The TFT Display From Memory Effect
Important: The following is important for the lifespan of the backlighting:
Choose a turn off time that is definitely not too short (not less
than 30 min) since frequent turning on of the backlighting will
noticeably reduce its lifespan. This particularly applies at low
temperatures. Here the backlighting of the display should never
be switched off but instead a screen saver should be used which
displays a changing or completely black screen in order to achieve
the maximum lifespan of the backlighting.