Data processing device and power saving control method

• US 20060010331A1
• Filed: 07/07/2005
• Published: 01/12/2006
• Est. Priority Date: 07/08/2004
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ohara, Eiji
• Granted Patent: US 7,389,431 B2
• Time in Patent Office: Days
• US Class Current: 713/323
• CPC Class Codes: G06F 1/3215 Monitoring of peripheral devices
• CPC Class Codes: G06F 1/3284 Power saving in printer
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A data processing device which can communicate with a computer terminal, comprises: a receiver to receive data transmitted from the computer terminal; a shifter to shift a state of the data processing device to a power saving state, after elapse of a predetermined time; and a releaser to release the power saving state according to specific data transmitted from the computer terminal, wherein, after the power saving state was released by the releaser, when the received data is first kind of data, the shifter shifts the data processing device to the power saving state after elapse of a first predetermined time, and, when the data received by the receiver is second kind of data different from the first kind of data, the shifter shifts the data processing device to the power saving state after elapse of a second predetermined time different from the first predetermined time.

Claims

1. A data processing device which can communicate with a computer terminal, comprising:

a reception unit adapted to receive data transmitted from the computer terminal;

a shift unit adapted to shift a state of said data processing device to a power saving state after elapse of a predetermined time; and

a release unit adapted to release the power saving state according to specific data transmitted from the computer terminal,

wherein, after the power saving state was released by said release unit,

in a case where the data received by said reception unit is first kind of data, said shift unit shifts the state of said data processing device to the power saving state after elapse of a first predetermined time, and

in a case where the data received by said reception unit is second kind of data different from the first kind of data, said shift unit shifts the state of said data processing device to the power saving state after elapse of a second predetermined time different from the first predetermined time.

2. A data processing device according to claim 1, wherein

said shift unit further comprises a discrimination unit adapted to discriminate, after the power saving state was released by said release unit, whether or not at least one of a print request and print data is included in the data received by said reception unit, and

in a case where it is discriminated that at least one of the print request and the print data is included in the data received by said reception unit, said shift unit shifts the state of said data processing device to the power saving state after the elapse of the first predetermined time.

3. A data processing device according to claim 1, wherein the second predetermined time is shorter than the first predetermined time or longer than a previously determined time.

4. A data processing device according to claim 1, wherein the specific data indicates a command for releasing a sleep state of a print device but is not a print command for causing said print device to execute a print process.

5. A data processing device according to claim 1, wherein

the specific data includes a data sequence generated based on a physical address inherent in said data processing device, and

in a case where the specific data includes the generated data sequence, said release unit releases the power saving state of said data processing device.

6. A data processing device according to claim 1, wherein the second kind of data is a search packet for searching, after the power saving state of the plural in-power-saving-state data processing devices was released, the plural data processing devices connected through a network.

7. A power saving control method for a data processing device which can communicate with a computer terminal, said method comprising:

a reception step of receiving data transmitted from the computer terminal;

a shift step of shifting a state of the data processing device to a power saving state after elapse of a predetermined time; and

a release step of releasing the power saving state according to specific data transmitted from the computer terminal,

wherein, in said shift step, after the power saving state was released in said release step,

in a case where the data received in said reception step is first kind of data, it shifts the state of the data processing device to the power saving state after elapse of a first predetermined time, and

in a case where the data received in said reception step is second kind of data different from the first kind of data, it shifts the state of the data processing device to the power saving state after elapse of a second predetermined time different from the first predetermined time.