DESIGNER’S HANDBOOK 4189350049C EN
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12 Appendix 1: Colour calibration - service instruction
The menu function in this document is available in all XDi library packages released
after the date 25.03.2020 - but only if the version number is v2000 or higher.
Note:
Library ver.2xxx means that the library package includes the needed XDi platform 2 software.
Libraries with version v0xxx or v1xxx must first be moved to software platform 2 and released as a platform 2
library to get the new functions.
12.1 Display colour calibration
12.1.1
Introduction
When an LCD colour display with LED backlight ages it is not only the backlight level that is reduced, but also the
colour temperature of the backlight LEDs that may change. The actual aging seems to be different from type to
type, and also under which conditions the aging takes place.
The worst case scenario is installations where the display is running with a constant full backlight level and at high
ambient temperatures. In such installations the aging process is accelerated, and the colour change seems to be
more visible, and the illumination level is also decreasing faster.
We have experienced some XDi 192 displays where the backlight colour over time goes from warm white to a more
bluish white.
In the following example two XDi 192 rudder indicators has been running for a long time at a very high temperature
and with full backlight all the time. This has resulted in a degradation of the backlight and the white colours are now
turned blueish as illustrated on the pictures below.
PORT RUDDER
STBD RUDDER
If the starboard indicator now fails and is replaced by a new XDi 192 directly from production, it may look like this:
PORT RUDDER
STBD RUDDER
