Patent ID: 9172834
Filing Date: 2015-10-27
Classification: H04N

Abstract:
1. An image forming system comprising: an image forming apparatus and an external terminal being connected to each other via a network, the external terminal being capable of operating the image forming apparatus, the image forming apparatus comprising: a controller comprising: a power supply cutoff controller that controls cutting off or providing power supply to a load, wherein when the wireless LAN module outputs the control signal to the power supply cutoff controller, the power supply cutoff controller provides power supply to the load if the control signal is effective, the image forming apparatus having the following three power saving modes: (1) a first power saving mode for cutting off power supply to the load; (2) a second power saving mode for cutting off power supply to the load and setting at least the CPU of the controller to the STR state; and (3) a third power saving mode for providing power supply only to the wireless LAN module and the power supply cutoff controller, the external terminal being capable of recovering the image forming apparatus from the first, second, and third power saving mode by the following respective methods: (1) a first method of the external terminal accessing the image forming apparatus at the application level; (2) a second method of the external terminal transmitting the certain type of packet to the wired LAN module; and (3) a third method of the external terminal transmitting the second certain type of packet to the wireless LAN module, wherein the external terminal implements both the second method and the third method before the external terminal implements the first method to access the image forming apparatus at the application level.