The locations of a passenger information system are often monitored at the operator’s central control centre using automated status reports (on a scheduled and event-driven basis). A backlight monitoring function for TFT displays offers numerous advantages: it enables continuous monitoring of operational functions and signals faults via an error output. This allows fault and status messages to be recorded and analysed in real time, and rectified as quickly as possible
Backlight monitoring enables changes in brightness or the failure of individual LEDs to be detected at an early stage, so that action can be taken before the display fails completely. This enhances operational reliability, as it ensures that the content displayed is not only present but also reliably visible.
At the same time, adjusting the brightness to suit requirements helps to improve energy efficiency and ensure optimum readability, as it is constantly and automatically adjusted to the ambient light levels.