Casio IT-2000W manual Transition of Backlight Control Methods, ABC on, Abc Off

Transition of Backlight Control Methods

The concept of ABC lies in automating user operations. However, automatic control depends on the illumination sensor. It cannot be perfect because various types of light, sunlight or room light for example, may be incident to the sensor. Consequently, this requires manual ON/OFF control even if under ABC control. This leads to a further problem wherein the user may forget to turn it on or off. To avoid these problems this system employs the following rules for transition between ABC, manual operation (ON function/OFF function), and ABO.

OFF

ABO time or OFF function

ON

ON function

ABC ON OFF function

ABC OFF

ABC Control

OFF function or ABO time

Fig. 6.6

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