Abstract: An apparatus configured to support a USB storage device to hot plug when a computer is under a disk operating system is provided. The USB storage device can startup when the computer is under the disk operating system. The apparatus includes a detection unit and a data transmission unit. The detection unit detects whether the USB storage device is connected to a USB interface unit of the computer when the computer is in a disk operating system. The data transmission unit obtains contents in the USB storage device and transmits the content to a south bridge chip of the computer when the USB storage device is connected to the USB interface unit. The disclosed subject matter also provides a computer and a method of supporting a USB storage device to hot plug when the computer is under disk operating system.

Abstract: A back light brightness adjusting apparatus includes a control unit, a first adjusting unit, and a second adjusting unit. The control unit receives a first control signal from a display chip, and outputs at least one of a first switch signal or a second switch signal. The second adjusting unit receives a second control signal from the display chip. When the electronic device is turned on, the control unit outputs the first switch signal at a first voltage and the second switch signal at a second voltage, a first adjusting signal is received from a CPU and the back light brightness is adjusted. When the electronic device is turned off, the control unit outputs the first switch signal at a third voltage and the second switch signal at a fourth voltage, a second adjusting signal is received from the display chip and back light brightness is adjusted accordingly.