Casio DT-X100 Series Software Manual page 14

(2) Backlight auto dimming (only under battery power)
- If the terminal is left over in idle state, with no key input, the backlight will dim automatically (the
auto dimming function is only enabled under battery power).
When key input resumes, the dimmed state is canceled and the display reverts to normal
brightness.
- Auto dimming setting can be changed between yes/no using the contrast and brightness
properties (default: Yes), and the standby time before dimming (default: 1 minute) can be
changed.
- The setting for the brightness of the LED backlight during auto dimming can be changed using
contrast and properties. (Eight levels are available, the default is the third level).
(3) Backlight Auto Off
- If the terminal is left over in idle state, with no key input, the backlight will turn off automatically, to
save power. When key input resumes, the display reverts to normal brightness.
- The backlight auto off setting can be changed between yes/no using the contrast and brightness
properties (default: Yes), and the standby time auto off (default: 5 minutes) can be changed.
- While under battery power, pack and both the Auto Dimming function and the Auto Backlight OFF
function have been enabled, the function with the shorter preset time period will be enabled.
(Example: If auto dimming is set to 1 minute and auto backlight off is set to 5 minutes -> auto
dimming after 1 minute, then backlight off 4 minutes later.
If auto dimming is set to 5 minutes and auto backlight off is set to 1 minute -> Only
backlight off occurs after 1 minute (in this case, auto dimming does not operate).
(4) Screen display rotation
The display can be rotated by turning the screen.
(5) Virtual Off
Virtual Off is a wireless standby state due to low power consumption. When the system has entered
virtual off state, its display and backlight turn off. The display and backlight turn back on when it is
restored from virtual off state.
[Note] Refer to "2.8.4 Power-saving control" for details.
(6) Backlight brightness restriction by the temperature sensor (under external power
supply or battery power)
i The backlight brightness is automatically restricted when the temperature inside the terminal is
high.
- There are two levels of restriction. The first restricts backlight brightness so that it can only be
set to the level levels from 1 to 7 out of 9.
- The second level restricts brightness so that it can only be set to the level levels from 1 to 5 out
of 9.
ii If normal brightness or brightness when dimmed by the auto dimming function (only under
battery power) is set higher than the valid range (levels) under restriction, the display is
automatically dimmed to the highest level allowed in the restricted range. Once the temperature
drops and the restriction is canceled, brightness automatically reverts to its previous level.
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