Patent ID: 8339524

Claim:
An expansion module, adapted to a projector, comprising: a housing, a logic circuit, and an output port, wherein the logic circuit is disposed in the housing for controlling an operation of the expansion module, the output port is disposed in the housing and coupled to the logic circuit, the output port is connected to an input port disposed in the housing of the projector, the output port is capable of outputting a first signal to the input port, such that the projector is capable of generating an image and is capable of projecting the image according to the first signal, the output port of the expansion module is fixed to the input port of the projector in a pluggable manner, and a specification of the output port of the expansion module and a specification of the input port of the projector are matched, such that the expansion module and the projector are able to connect with each other in the pluggable manner, wherein the expansion module further comprises a battery, adapted to provide electrical power for the projector via the output port of the expansion module and the input port of the projector.