Patent ID: 7900070

Claim:
A power saving method for a bi-directional communication wireless peripheral device in communication with a host, comprising: providing a wireless communication protocol between the host and the bi-directional communication wireless peripheral device; establishing a bi-directional communication wireless link between the host and the bi-directional communication wireless peripheral device through the wireless communication protocol; and entering a power off mode when the bi-directional communication wireless link does not exist, wherein in the power off mode, a plurality of functional modules in the bi-directional communication wireless peripheral device is in a non-operating state, wherein the bi-directional communication wireless peripheral device further comprises the following operational modes: an initial mode, a working mode, a stand-by mode, wherein in the initial mode, the functional modules of the bi-directional communication wireless peripheral device are activated, the bi-directional communication wireless link is attempted to be established, the working mode is entered when the bi-directional communication wireless link is established, and the power off mode is entered when the bi-directional communication wireless link fails to be established; in the working mode, the functional modules are in the operating state; and in the stand-by mode, a part of the functional modules are in the non-operating state, if the bi-directional communication wireless peripheral device receives a user operation in a first predetermined time, the bi-directional communication wireless peripheral device will enter the working mode from the stand-by mode, if the bi-directional communication wireless peripheral device does not receive a user operation for the first predetermined time or the bi-directional communication wireless link does not exist, the bi-directional communication wireless peripheral device will enter the power off mode from the stand-by mode.