DESIGNER’S HANDBOOK 4189350049C EN
Page 121 of 206
10.2.2
Auto Day/Night shift mode
“Auto Day/Night shift” and “Auto Day/Dusk/Night shift” modes are basically the same mode. The only difference is
that Day/Night mode does not have a dusk indicator design implemented in the library.
If Day/Dusk/Night is selected in a library without dusk design, the night design will be used instead of the dusk
design.
In normal dimmer mode without auto shift, the dimmer level from 0 to 100 % controls the backlight level from min.
(typically 10) to max. (typically 250). Where the backlight level range is 0-250.
The Auto Day/Night colour shift function makes the dimmer work slightly different, by using the dimmer value from
0 to 100 % to control not only dimmer level but also the display colour.
For each display colour (Day/(Dusk)/Night), the XDi is programmed to generate the optimal backlight range.
10.2.2.1
Auto Day/Night Colour shift
This function is quite advanced and may best be explained by the illustration below:
Figure description:
The Day/Night shift point is in this example located at 60 % with a hysteresis of 2 %.
The hysteresis secures that the display will never be flickering between day and night presentations.
When the dimmer level is increased gradually from dimmer level 0 % to 61 %, the indicator will use the black night
design, and the backlight will be increased from 10 to the
“Night max” level of setup to 200.
When the dimmer level reaches 62 %, the indicator will shift to the white day design and reduce the backlight level
to 50.
Continuing the dimmer level from 62 % to 100 % will increase the backlight level again from 50 to the maximum
level setup to be 250.
