| 摘要 |
An image forming device includes at least one image formation function of copying, scanning, and printing, and a server function enabling reading of data from a storage unit and writing of data into the storage unit, the image forming device being connected to at least one external device having a server function via a network and including a power supply control unit configured to control a plurality of power-saving modes having different settings for supplying power to hardware, to make power consumption smaller than power consumption in a normal mode for enabling the image formation function, wherein: the plurality of power-saving modes include a first power-saving mode, a second power-saving mode, and a third power-saving mode; and the power supply control unit includes: a packet analyzing unit; a determining unit; and a mode control unit. |
| 主权项 |
1. An image forming device having at least one image formation function of copying, scanning, and printing, and a server function enabling reading of data from a storage unit and writing of data into the storage unit, the image forming device being connected to at least one external device having a server function via a network, the image forming device comprising:
a power supply control unit configured to control a plurality of power-saving modes having different settings for supplying power to hardware, to make power consumption smaller than power consumption in a normal mode for enabling the image formation function, wherein:
the plurality of power-saving modes include a first power-saving mode for enabling a network connection function, a second power-saving mode for enabling a mediation function for mediating processing for the external device, and a third power-saving mode for enabling the server function; and the power supply control unit includes:
a packet analyzing unit configured to analyze a packet received from the network when a power supply state is the first power-saving mode;a determining unit configured to determine whether an instruction contained in the packet is a request for use of the image formation function, whether the instruction contained in the packet is a request for use the server function, and whether the instruction contained in the packet is a request for use of a service being provided by the external device, in accordance with a result of the analysis of the packet; anda mode control unit configured to switch the power supply state from the first power-saving mode to the normal mode when the instruction contained in the packet is a request for use of the image formation function, and switch the power supply state from the first power-saving mode to the second power-saving mode when the instruction contained in the packet is a request for use of a service being provided by the external device. |
