Abstract: A multifunctional universal serial bus (USB) wireless keyboard for operating a control function of a personal computer (PC) is presented. A main body of the keyboard includes a plurality of keys, a signal sending module, and a coding circuit. When the key is pressed, the coding circuit generates a corresponding character signal, and the signal sending module converts the character signal into a radio signal and sends the radio signal. A receiving module receives the radio signal, and transmits the radio signal to the PC. The receiving module further includes a clock control pin and a USB module electrically connected to the PC. An embedded controller is disposed in the PC and electrically connected to the receiving module through the clock control pin, and sends a corresponding function trigger signal to a south bridge chip set according to a pressing time of the received radio signal.

Abstract: A backlight module including a back plate, a reflector, a light source and a light guide plate is provided. The back plate has at least a recess. The reflector is disposed on the back plate and has at least one protrusion part disposed on the recess. The light source is disposed on the reflector. The light guide plate is disposed on the back plate and adjacent to the light source, and the light guide plate is supported by the protrusion part. Since the reflector having the protrusion part cooperates with the back plate, the reflector has a larger inner space to avoid the collisions between the light sources, and between the light source and the reflector.