Справочник Пользователя для Samsung NP355V5C

This shows the power source and the battery 

charge status.

  

 Green: When the battery is fully charged or 

the battery is not installed.

/   Red or orange: When the battery is being 

charged.

   Off: When the computer is running on 

battery power without being connected to 

AC adapter.

This sensor detects the ambient illumination of 

the PC.
If the ambient illumination becomes dark, 

the LCD becomes dimmer and the keyboard 

backlight is lit.
On the contrary, if the ambient illumination 

becomes brighter, the LCD becomes brighter 

and the keyboard backlight is turned off.