Abstract: A heat dissipation device of a PCB has electronic devices arranged thereon. The heat dissipation device has a plurality of heat dissipation holes formed on the PCB and corresponding to the electronic devices, respectively. The heat dissipation device can dissipate heat from an electronic device without a fan, so that a restriction of an arrangement of the electronic device on the PCB can be prevented.

Abstract: The present invention relates to a method for operating a multimedia real-time system, which involves the steps of turning on the power of the multimedia real-time system, starting the multimedia real-time system, and executing an operating interface of a multimedia real-time system. In the present invention, a real-time operating system starts to work as soon as the power of the multimedia real-time system is turned on, regardless of whether the multimedia real-time system is working. The real-time operating system is a master control, which enables the system to switch directly between the multimedia real-time system and the general visual Windows operating system, without any time delay.