Information processing apparatus and method with setting of power off state and with recognition of printer operating state
AssigneeCanon Kabushiki Kaisha
InventorJiro Tateyama
Life of this patent
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Abstract
An information processing apparatus includes an information processing unit power saving controller for controlling a power saving function of an information control unit for controlling various devices, and a printer unit power saving controller for controlling a power saving function of a printer unit for performing a print operation. The printer unit power saving controller controls the power saving function of the printer unit on the basis of a predetermined command from the information processing unit power saving controller.
Claims11
An information processing apparatus comprising:
- host control means for controlling said information processing apparatus, said host control means placing said information processing apparatus in a power-on state and a power-off state in response to input of a power-on signal and a power-off signal, respectively;
- and
- printer control means for controlling a printer, said printer control means sending to said host control means a printer-operating signal indicating that the printer is in a printing state or a printer-standby signal indicating that the printer is in a standby state according to a printer state,
- wherein said host control means sends a power-off request signal to said printer control means in response to input of the power-off signal,
- wherein said printer control means sends to said host control means the printer-operating signal or the printer-standby signal in response to a power-off request signal from said host control means,
- wherein said host control means does not place said information processing apparatus in the power-off state if the power-off signal is input and if the printer-operating signal is received from said printer control means,
- wherein said host control means places said information processing apparatus in the power-off state if the power-off signal is input and if the printer-standby signal is received from said printer control means, and
- wherein said host control means places said information processing apparatus in the power-on state if the power-on signal is input, irrespective of the printer operating signal or the printer-standby signal being received from said printer control means.
A method carried out in an information processing apparatus including host control means for controlling the information processing apparatus, the host control means placing the information processing apparatus in a power-on state and a power-off state in response to input of a power-on signal and a power-off signal, respectively, and printer control means for controlling a printer, the printer control means sending to the host control means a printer-operating signal indicating that the printer is in a printing state or a printer-standby signal indicating that the printer is in a standby state according to a printer state, said method comprising the steps of:
- controlling the host control means to send a power-off request signal to the printer control means in response to input of the power-off signal;
- controlling the printer control means to send to the host control means the printer-operating signal or the printer-standby signal in response to the power-off request signal from the host control means;
- controlling the host control means not to place the information processing apparatus in the power-off state if the power-off signal is input and if the printer-operating signal is received from the printer control means;
- controlling the host control means to place the information processing apparatus in the power-off state if the power-off signal is input and if the printer-standby signal is received from the printer control means;
- and
- controlling the host control means to place the information processing apparatus in the power-on state if the power-on signal is input, irrespective of the printer-operating signal or the printer-standby signal being received from the printer control means.
Dependencies are inferred from the claim text.