Backlight
The Backlight Control setting lets you select for how long the display screen is backlit.
To change the backlight setting:
1.Press O> Settings/Tools > Settings > Display > Light
Control > Screen Backlight Control.
2.Select how long the backlight should stay on. (If you choose Always On, the backlight stays on as long as the phone is open.)
3.Press O.
Keypad Light Sensor
Your phone’s Keypad Light Sensor measures available light and determines if the keypad backlight needs to be turned on. If you turn Keypad Light Sensor on, the keypad is lit only when it is needed. If you turn Keypad Light Sensor off, the keypad stays lit whenever you are using your phone.
To set Keypad Light Sensor to measure ambient light:
1.Press O> Settings/Tools > Settings > Display > Light
Control > Keypad Light Sensor.
2.Highlight On.
3.Press O.
Note:
Setting long light durations affects the life of the battery.