JP2006264057A - Printer and power-saving control method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer which switches power-saving shift times depending on the frequency of printing by a print client, and a power-saving control method therefor. <P>SOLUTION: When receiving printing data from a host terminal 10, the printer 20 makes a print client extraction part 22 extract printer user identification information from the data, and makes a print client determination part 23 determine whether or not the extracted printer user identification information is registered in high-frequency printer user information 25a. As the result of determination, when it is determined that the extracted printer user identification information is registered, a power-saving control part 24 makes a power-saving shift time setting part 24a set the power-saving shift time for a high-frequency printer user, and starts the clocking of the power-saving shift time for the high-frequency printer user. When it is determined that the extracted printer user identification information is not registered, the control part 24 makes the setting part 24a set a power-saving shift time for a general printer user, and starts the clocking of the power-saving shift time for the general printer user. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printing apparatus capable of receiving print data from a plurality of host terminals, executing print processing based on the print data, and setting a power saving transition time from the end of printing to shifting to a power saving mode, and its power saving More particularly, the present invention relates to a printing apparatus that switches a power saving transition time according to a printing frequency of a print requester and a power saving control method thereof.

  Generally, in an office (company, government office), a school, or the like where a plurality of users perform printing, a printing environment in which a printing apparatus such as a printer can be shared and used by a plurality of users is constructed.

  In such a printing environment, a large amount of power is consumed even when printing processing is not being performed. Therefore, the printing apparatus has a power saving mode in which power consumption can be reduced as compared with normal operation. Is provided.

  Normally, if a job such as print processing does not occur after a predetermined time (power saving transition time) has elapsed, the printing apparatus shifts to the power saving mode and stops functions except for the minimum necessary part. Become.

Also, as in the invention of Patent Document 1, for each time slot of the day, the usage records of the printing apparatus are totaled to create an operation pattern, a time slot with a large amount of communication is extracted, set in a timer, A technique for reducing power consumption by automatically turning on and off is also known.
Japanese Patent Laid-Open No. 03-159771

  By the way, in the offices and schools described above, the printing apparatus is shared by a plurality of users. However, in the office, for example, the frequency of performing printing differs for each user due to the difference in duties, departments, etc. A user who frequently performs (a high-frequency print requester) and a user who hardly prints (a low-frequency print requester) coexist.

  In such an environment, if the power saving transition time of the printing apparatus is set to be short, the high frequency print requester performs the printing process for the time required for the printing apparatus to return from the power saving mode each time the printing process is performed. It will be waiting, and convenience will be impaired.

  On the other hand, if the power saving transition time of the printing apparatus is set to be long, when the low-frequency print requester occasionally performs the printing process, the printer operates in the normal mode for a sufficient time, and wasteful power consumption occurs. .

  That is, in the printing environment as described above, when a uniform power saving mode is provided and the printing apparatus is operated regardless of the user, convenience is lost or wasteful power consumption occurs.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide a printing apparatus and a power saving control method for switching the power saving transition time according to the printing frequency of the print requester.

  In order to achieve the above object, the invention of claim 1 receives print data from a plurality of host terminals, executes print processing based on the print data, and shifts to power saving from the end of printing to shifting to a power saving mode. In a printing apparatus capable of setting a time, an extraction unit that extracts printer identification information from print data received from the host terminal, and a print requester's printing frequency based on the printer identification information extracted by the extraction unit When the determination means determines that the print requester has a high printing frequency, the power saving transition time corresponding to the print requester is set long, and the determination means determines the print requester And a power saving transition time setting means for setting the power saving transition time corresponding to the print requester short when the printing frequency is determined to be low. That.

  The invention of claim 2 further comprises high-frequency print requester holding means for holding printer identification information corresponding to a print requester having high printing frequency in the invention of claim 1, wherein the determination means comprises: When the printer identification information extracted by the extraction unit is held in the high-frequency print requester holding unit, it is determined that the printing frequency of the print requester is high, and in other cases, It is determined that the printing frequency of the print requester is low.

  According to a third aspect of the present invention, in the second aspect of the present invention, the high frequency print request is based on history information holding means for holding history information relating to print processing, and history information held in the history information holding means. The printer holding means further comprises power saving information management means for registering printer identification information corresponding to a print requester who has a high printing frequency.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the power saving information management unit counts the cumulative number of print processes for each print requester from the history information held in the history information holding unit, Printer identification information corresponding to a print requester whose cumulative number is greater than or equal to a predetermined number is registered in the high-frequency print requester holding unit.

  According to a fifth aspect of the present invention, in the third aspect of the present invention, the power saving information management unit counts the number of printing processes per unit time for each print requester from the history information held in the history information holding unit. In addition, printer identification information corresponding to a print requester having a predetermined number or more of print processing times per unit time is registered in the high-frequency print requester holding unit.

  According to a sixth aspect of the present invention, in the first to third aspects of the present invention, the power saving information managing means determines the number of print processes per unit time for each print requester from the history information held in the history information holding means. And the printer identification information corresponding to the print requester having a predetermined number of print processing times per unit time is registered in the high-frequency print requester holding means.

  According to a seventh aspect of the present invention, in the first to sixth aspects of the invention, the power saving mode includes a first power saving mode for controlling a function of a part of the device to a power saving state and a function of a plurality of parts of the device. A second power saving mode that is controlled to the state, and when the determination means determines that the printing requester has a high printing frequency, the second power saving mode is entered after the transition to the first power saving mode. Transition to the power saving mode is controlled, and when the determination unit determines that the printing requester has a low printing frequency, the shift to the second power saving mode is performed without shifting to the first power saving mode. It is characterized by controlling.

  The invention of claim 8 can receive print data from a plurality of host terminals, execute print processing based on the print data, and set a power saving transition time from the end of printing to the power saving mode. In the power saving control method of the printing apparatus, the printer identification information is extracted from the print data received from the host terminal by the extraction unit, and the printing frequency of the print requester is determined based on the printer identification information extracted by the extraction unit When the determination means determines that the print requester has a high printing frequency, the power saving transition time corresponding to the print requester is set longer by the power saving transition time setting means, and the determination means If the printing requester determines that the printing frequency is low, the power saving transition time corresponding to the printing requester is set shorter by the power saving transition time setting means. And wherein the door.

  According to the present invention, the printer identification information is extracted from the print data received from the host terminal, the print frequency of the print requester is determined based on the printer identification information, and the print frequency of the print requester is determined based on the determination result. If the print requester determines that the printing frequency is low, the power saving transition time is set to a long time, while if the print requester determines that the printing frequency is low, the power saving transition time is set to a short time. Depending on the printing frequency, the printing apparatus can be shifted to the power saving mode at different power saving transition times.

  Therefore, even in a printing environment in which a print requester with a high printing frequency and a print requester with a low printing frequency coexist, convenience is not impaired and wasteful power consumption can be reduced.

  In addition, since it is not based on the date and time, a clock for measuring the date and time is not required, and it can be realized only by the software timer in the printer, so that the cost merit is great.

  Embodiments of a printing apparatus and a power saving control method thereof according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing an example of the overall configuration of a printing system configured with a printing apparatus according to the present invention.

  The printing system includes a plurality of host terminals 10 and a printer 20. In this embodiment, the case where the host terminal 10 and the printer 20 are connected via a LAN will be described. However, the connection form is not particularly limited as long as the function of the present invention is executed.

  The host terminal 10 is a personal computer or the like handled by a user, and a printer 20 is connected to the host terminal 10. The user can make a print request to the printer 20 from this terminal. When a print request is made from the host terminal 10, print data is transmitted to the printer 20.

  In addition, a plurality of host terminals 10 are arranged, and the users handled for each terminal are different. Therefore, a user who frequently performs printing processing (hereinafter referred to as a high-frequency print requester) and other users (hereinafter referred to as general print requesters) share the printer 20.

  Each host terminal 10 is assigned unique identification information, for example, an IP (Internet Protocol) address, and the print data transmitted from the host terminal 10 to the printer 20 includes the identification information. Details will be described later. However, the printer 20 can recognize from which terminal (print requester) the received print data is transmitted.

  The printer 20 as a printing apparatus performs print processing based on print data received from the host terminal 10. In addition to the normal mode that is the normal operation state, the operation mode includes a power saving mode that can reduce power consumption. For example, if a print request is not received from the host terminal 10 for a predetermined time, In order to reduce the power, the operation mode is switched from the normal mode to the power saving mode.

  The printer 20 includes a print data receiving unit 21, a print requester extracting unit 22, a print requester determining unit 23, a power saving control unit 24, a power saving data holding unit 25, and power saving information arbitrary setting as various processing function units. A unit 26 and a print output unit 27 are provided.

  The print data receiving unit 21 is a processing unit that receives print data from the host terminal 10. The print data received here includes printer identification information in addition to the image data to be printed.

  The print requester extraction unit 22 is a processing unit that extracts printer identification information from the print data received by the print data reception unit 21. The printer identification information includes a terminal name, an IP address assigned to the host terminal, a mac (Media Access Control) address, and the like, and any other information that can identify the print requester.

  The print requester determination unit 23 is a processing unit that determines whether or not the print requester who has transmitted the print data is a high-frequency print requester, and outputs the determination result. Specifically, it is determined whether or not the printer identification information extracted by the print requester extraction unit 22 is registered in the high-frequency printer information 25a held in the power saving data holding unit 25. When the printer information is registered in the printer information 25a, “printer relevant” is output, and in the other case, “printer not applicable” is output.

  The power saving control unit 24 is a processing unit that performs power saving control based on the determination result of the print requester determining unit 23. Specifically, based on the determination result, after setting the power saving transition time, if there is no print request from the host terminal 10 after the power saving transition time has elapsed, the printer 20 is shifted to the power saving mode.

  Furthermore, a power saving transition time setting unit 24 a is provided in the power saving control unit 24. The power saving transition time setting unit 24 a is a processing unit that sets the power saving transition time based on the determination result of the print requester determination unit 23. Specifically, if the printer requester determination unit 23 inputs a printer responder presence, the high-frequency person power saving transition time is set, while the print requester determination unit 23 inputs a printer responder inapplicable time. Then, the power saving transition time for general users is set. The power saving transition time that is longer than the power saving transition time for general users is set as the power saving transition time for the high frequency person.

  The power saving data holding unit 25 corresponds to a memory in which various operation information regarding power saving mode transition is stored, and in this memory, the high frequency printer information 25a holding the printer identification information assigned to the high frequency printing requester. And data including power saving transition time information 25b that holds the power saving transition time for high frequency users and the power saving transition time for general users is stored.

  The power-saving information arbitrary setting unit 26 is a high-frequency printer information stored in the power-saving data holding unit 25 that stores various operation information related to the power-saving mode instructed by the user from an operation panel (not shown) installed in the printer 20 main body. 25a and the power saving transition time information 25b. That is, the user's arbitrary high-frequency printer information 25a and the power saving transition time information 25b can be set, and setting values considering the usage status of the printer 20 can be freely set.

  The print output unit 27 includes a photosensitive drum, a transfer belt, and the like, and is a processing unit that executes print processing based on print data received by the print data receiving unit 21. The above is a description of each functional block showing the internal configuration of the printer 20 according to the present invention.

  An outline of the power saving control process of the printer 20 according to the present invention will be described with reference to FIG.

  For convenience of explanation, it is assumed that the user A is a high-frequency print requester registered in the high-frequency printer information 25a, and the user B is a general print requester not registered in the high-frequency printer information 25a. In the following description, it is assumed that 20 minutes is set as the power saving transition time for high frequency users, and 5 minutes is set in advance as the other power saving transition time for general users.

  Under such a premise, when the user A performs the printing process, as shown in FIG. 5A, after the printing process is completed, the printer 20 enters the power saving mode after entering the standby state for 20 minutes. To do. On the other hand, when the user B performs the printing process, as shown in FIG. 5B, after the printing process is completed, the printer 20 enters the power saving mode after entering the standby state for 5 minutes. It becomes.

  FIG. 5C shows an outline of the power saving control process when the user B performs the printing process immediately after the user A printing.

  After the printing process of the user A is completed, the printer 20 enters a standby state, and the user B performs a printing process during the standby state. Normally, when the user B performs the printing process, the printer 20 enters the power saving mode after entering the standby state for 5 minutes from the end of the printing process of the user B. The time until the transition to the power saving mode by the printing process of the user A is longer than 5 minutes which is the power saving transition time of the user B. In this case, priority is given to the longer transition time until power saving.

  Accordingly, the printer 20 does not shift to the power saving mode 5 minutes after the end of the printing process of the user B, and shifts to the power saving mode 20 minutes after the end of the printing process of the user A. For example, conversely, when user B performs the printing process after 18 minutes have elapsed since the end of the user A printing process, the time until the user B shifts to the power saving mode by the printing process is longer than that of user A. In this case, the printer 20 shifts to the power saving mode 5 minutes after the end of the printing process of the user B.

  FIG. 3 is a flowchart for explaining the operation of the printer 20 according to the present invention. Here, the description will be made assuming that the power saving transition time for the high frequency person is set to a power saving transition time longer than the power saving transition time for the general user.

  The printer 20 is in a standby state until it receives print data from the host terminal 10 or shifts to a power saving mode after a predetermined time has elapsed (NO in step S101, NO in step S102).

  When print data is received from the host terminal 10 during this standby state (YES in step S101), the printer 20 receives the print data at the print data receiving unit 21 and print processing based on the data. Is executed by the print output unit 27 (step S104). Further, the print requester extracting unit 22 extracts the printer identification information from the print data received by the print data receiving unit 21 (step S105).

  The extracted print requester identification information is determined by the print requester determination unit 23 as to whether or not it is identification information of a high frequency print requester who performs print processing with high frequency (step S106). Specifically, whether the printer identification information extracted by the print requester extraction unit 22 by the print requester determination unit 23 is registered in the high-frequency printer information 25 a held in the power saving data holding unit 25. Determine whether or not.

  If it is determined by this determination that the extracted printer identification information is registered in the high-frequency printer information 25a (YES in step S107), the print requester determination unit 23 outputs that the printer is relevant. Then, the power saving control unit 24 sets the power saving transition time for the high frequency user in the power saving transition time in the power saving transition time setting unit 24a (step S111), and starts measuring the power saving transition timer based on the power saving transition time (step S111). S112). Then, the printer 20 returns to step S101 and enters a standby state again.

  On the other hand, in the determination in step S107, the printer identification information extracted by the print requester extraction unit 22 by the print requester determination unit 23 is added to the high-frequency printer information 25a held in the power saving data holding unit 25. If it is determined that it is not registered (NO in step S107), the print requester determination unit 23 outputs “not applicable” as a printer.

  Along with this output, the power saving control unit 24 determines whether or not the power saving transition timer is timing (step S108). If the power saving transition timer is not timing (NO in step S108), the power saving transition time is set. The power saving transition time for the general user is set as the power saving transition time in the unit 24a (step S110), and the power saving transition timer is started to count with this power saving transition time (step S112). (YES in step S108), the remaining timer time is compared with the power saving transition time for general users. In other words, priority is given to the longer standby state until the transition to the power saving mode (see FIG. 2).

  If it is determined from this comparison that the remaining time of the timer is longer than the power saving transition time for general users (YES in step S109), the printer 20 does not perform any processing and performs step S101. Returning to the state again, the standby state is entered again. On the other hand, if it is determined that the power saving transition time for general users is longer than the timer remaining time until the transition to the power saving mode is made (NO in step S109). Then, the power saving control unit 24 sets the power saving transition time for the general person as the power saving transition time in the power saving transition time setting unit 24a (step S110), and starts re-counting the power saving transition timer based on the power saving transition time (step S112). ). Then, the printer 20 returns to step S101 and enters a standby state again.

  If the printer 20 is in a standby state and the host terminal 10 has not received a print request after the power saving transition time has elapsed (NO in step S101, YES in step S102), the power saving control unit 24 causes the printer 20 to set the power saving mode. (Step S103) and the process is terminated.

  As described above, in the present invention, a high-frequency print requester is registered, and after the print processing of the print requester is completed, the power saving transition time is set longer than that of other print requesters. As a result, the transition time to the power saving mode is different after the print processing of the high-frequency print requester is completed and after the print processing of the general print requester is completed. In addition, wasteful power consumption can be reduced.

  In addition, since it is not based on the date and time, a clock for measuring the date and time is not required, and it can be realized only by the software timer in the printer, so that the cost merit is great.

  In the first embodiment, a case has been described in which a user registers in advance a print requester (a high-frequency print requester) who performs print processing at a high frequency. However, in the second embodiment, a print history is retained and the history is stored. In the following, an embodiment in which a high-frequency print requester is automatically registered will be described.

  FIG. 4 is a diagram illustrating an example of the overall configuration of a printing system configured with the printing apparatus according to the second embodiment. In addition, since what attached | subjected the code | symbol same as FIG. 1 which demonstrated the said Example 1 operate | moves substantially the same, only a different point is demonstrated here.

  The printer 20 includes a print data receiving unit 21, a print requester extracting unit 22, a print requester determining unit 23, a power saving control unit 24, a power saving data holding unit 25, and power saving information arbitrary setting as various processing function units. A unit 26, a print output unit 27, a history information holding unit 28, and a power saving information management unit 29. That is, the history information holding unit 28 and the power saving information management unit 29 are added to the configuration of FIG. 1 describing the first embodiment.

  The print requester extraction unit 22 is a processing unit that extracts printer identification information from the print data received by the print data reception unit 21. Furthermore, a history registration unit 22 a is provided in the print requester extraction unit 22. The history registration unit 22a is a processing unit that registers history information including the printer identification information extracted by the print requester extraction unit 22 and the date and time when the print data is received in a history information holding unit 28 described later. .

  The history information holding unit 28 corresponds to a memory that holds the history of the printer, and this memory holds history information related to the printing process performed by the printer 20. Specifically, as shown in FIG. 5, history information such as printing date and time, printer identifier information, the number of printed pages, and the like is held.

  Note that the printing date and time, that is, date and time information is not necessarily required and may not be included in the history information.

  The power saving information management unit 29 is a processing unit that sets and manages various types of operation information related to the power saving mode transition based on the history information held in the history information holding unit 28. Specifically, referring to the history information, a printer who performs printing processing with high frequency is extracted, and the printer identification information is registered in the high frequency printer information 25a.

  As a method for registering a high-frequency print requester in the high-frequency printer information 25a, for example, as shown in FIG. 6, a method for registering based on the cumulative number of print processes, and a unit time (in this case, 1 hour) There is a method of registering based on the number of times per print.

  When registering a high-frequency print requester based on the former cumulative number, a threshold for the cumulative number is provided. For example, the threshold is set to 50 times, and a printer whose cumulative number exceeds 50 is set as a high-frequency print requester. Is registered in the high-frequency printer information 25a. In this case, user A and user C correspond to high-frequency print requesters.

  In the latter case, when a high frequency print requester is registered based on the number of times of printing per unit time, a threshold is provided for the number of times of printing per unit time. For example, the threshold is set to 5 times, and printing per unit time is performed. A printer whose number of times exceeds five is determined as a high-frequency print requester and registered in the high-frequency printer information 25a. In this case, user A and user B correspond to high-frequency print requesters.

  In addition to this, a high-frequency print requester may be registered based on the print interval, a method of registering based on the cumulative number of these print processes, a method of registering based on the number of prints per unit time, A plurality of determination steps may be provided in combination with a method of registering based on the print interval.

  As described above, in the second embodiment, the print history is held, and various operation information related to the power saving mode transition is automatically set based on the history information held in the history. In addition to the above effect, the work of a machine administrator who manages the printer 20 can be reduced.

  In the second embodiment, the case has been described in which various operation information related to the power saving mode transition, in particular, the setting of the high-frequency printer information 25a is automatically performed based on the history information. The time may be set automatically. For example, referring to the history information, the power saving transition time is registered in the power saving transition time information 25b based on the printing frequency of the entire system.

  In the first embodiment, a case has been described in which both the high-frequency print requester and the general print requester both shift to the power-saving mode at the same power-saving level after the printing process ends. Different power saving levels are set for the requester and the general print requester. When the power saving mode is changed, the print processing of the high-frequency print requester is different from the end of the print processing of the general print requester. An embodiment in the case of shifting to the power saving mode of the power saving level will be described.

  FIG. 7 is a diagram illustrating an example of the overall configuration of a printing system configured by arranging printing apparatuses according to the third embodiment. In addition, since what attached | subjected the code | symbol same as FIG. 1 which demonstrated the said Example 1 operate | moves substantially the same, only a different point is demonstrated here.

  The printer 20 includes a print data receiving unit 21, a print requester extracting unit 22, a print requester determining unit 23, a power saving control unit 24, a power saving data holding unit 25, and power saving information arbitrary setting as various processing function units. A unit 26 and a print output unit 27 are provided.

  The power saving data holding unit 25 holds power saving level information 25c in addition to the high-frequency printer information 25a and the power saving transition time information 25b. The power saving level information 25c includes the power saving level information for the high frequency print requester (hereinafter referred to as the high frequency user power saving level information) and the power saving level information for the general print requester (hereinafter referred to as the general user power saving level information). ) And are set.

  When the general print requester prints, the power saving control unit 24 controls the entire printer 20 to the power saving state based on the power saving level information for general users after the power saving transition time has elapsed, and shifts the printer 20 to the power saving mode. On the other hand, when the high-frequency print requester prints, after the power saving transition time elapses, a part of the printer 20 is controlled to the power saving state based on the high-frequency person power saving level information, and the printer 20 is shifted to the power saving mode. . In the case of the latter (high-frequency print requester), if there is no print request from the host terminal 10 even after a certain period of time has elapsed, the power saving control unit 24 controls the entire printer 20 as in the case of the general print requester. Control power saving state.

  To put a part of the printer 20 in the power saving state, for example, the printer controller unit is in a normal operation and stops the power supply to only the fixing unit to enter the power saving state. The term “stops power supply to each part of the printer 20 including the printer controller unit and the fixing unit”.

  Therefore, the time required for return is shorter in the power saving mode in which a part is controlled to the power saving state than in the power saving mode in which the entire power saving state is controlled.

  As described above, in the third embodiment, the high-frequency print requester and the general print requester are provided with different power saving levels. Since it is made to shift to a power saving mode of a different power saving level after the end of the printing process of the print requester, power consumption can be further reduced in addition to the effects of the first embodiment.

  In the above embodiment, the case where the printing apparatus according to the present invention is applied to the printer 20 and the present invention is carried out has been described. It can be applied to all printing apparatuses having

  In addition, the present invention is not limited to the embodiments shown above and shown in the drawings, and can be implemented with appropriate modifications within a range not changing the gist thereof. For example, although the printing apparatus according to the present invention has been described using Examples 1 to 3, the embodiments of Examples 1 to 3 may be implemented in whole or in part.

  The printing apparatus and the power saving control method of the present invention can be applied to all printing apparatuses such as a printer having a printing function, a fax machine, a copier, and a multifunction peripheral, and in particular, a printing environment in which a printing apparatus is shared by a plurality of users, For example, it can be used effectively in offices (businesses, government offices), schools, and the like.

1 is a diagram illustrating an example of an overall configuration of a printing system configured by arranging printing apparatuses according to the present invention. It is a figure explaining the outline | summary of the power-saving control process of the printer 20 concerning this invention. 4 is a flowchart for explaining the operation of the printer 20 according to the present invention. FIG. 10 is a diagram illustrating an example of an overall configuration of a printing system configured with a printing apparatus according to a second embodiment. It is a figure which shows an example of the component of history information. It is a figure explaining the outline | summary of the power saving control process in the power saving information management part. FIG. 10 is a diagram illustrating an example of an overall configuration of a printing system configured by arranging printing apparatuses according to a third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Host terminal 20 Printer 21 Print data receiving part 22 Print requester extraction part 22a History registration part 23 Print requester judgment part 24 Power saving control part 24a Power saving transition time setting part 25 Power saving data holding part 25a High frequency printer information 25b Power saving transition Time information 25c Power saving level information 26 Power saving information arbitrary setting part 27 Print output part 28 History information holding part 29 Power saving information management part

Claims (8)

In a printing apparatus that receives print data from a plurality of host terminals, executes print processing based on the print data, and can set a power saving transition time from the end of printing to a power saving mode.
Extraction means for extracting printer identification information from print data received from the host terminal;
Determining means for determining the printing frequency of the print requester based on the printer identification information extracted by the extracting means;
If it is determined by the determination means that the print requester has a high printing frequency, a power saving transition time corresponding to the print requester is set to be long, and if the print requester has a low printing frequency by the determination means And a power saving transition time setting means for setting the power saving transition time corresponding to the print requester short when determined. Further comprising a high-frequency print requester holding means for holding printer identification information corresponding to a print requester having a high printing frequency,
The determination means includes
When the printer identification information extracted by the extraction unit is held in the high-frequency print requester holding unit, it is determined that the printing frequency of the print requester is high, and in other cases, The printing apparatus according to claim 1, wherein the printing requester determines that the printing frequency is low. History information holding means for holding history information relating to print processing;
Power saving information management means for registering, in the high frequency print requester holding means, printer identification information corresponding to a print requester with high printing frequency, based on the history information held in the history information holding means. The printing apparatus according to claim 2, wherein: The power saving information management means includes:
From the history information held in the history information holding means, the cumulative number of print processes is counted for each print requester, and the printer identification information corresponding to the print requester whose cumulative number is equal to or greater than a predetermined number is sent to the high-frequency print request. The printing apparatus according to claim 3, wherein the printing apparatus is registered in a person holding means. The power saving information management means includes:
From the history information held in the history information holding means, the number of print processes per unit time is counted for each print requester, and the printr identification corresponding to the print requester with the predetermined number of print processes per unit time or more The printing apparatus according to claim 3, wherein information is registered in the high-frequency print requester holding unit. When print data is received from the host terminal while the power saving transition time is being measured, the power saving transition time set corresponding to the reception of the print data is compared with the remaining power saving transition time during the time measurement. When the remaining time of the power saving transition time during the time measurement is longer than the power saving transition time set corresponding to the reception of the print data, the power saving transition time during the time measurement is prioritized and the power saving mode is entered. The printing apparatus according to any one of claims 1 to 3, wherein the shift is controlled. The power saving mode is
A first power saving mode for controlling a function of a part of the device to a power saving state;
A second power saving mode for controlling functions of a plurality of parts of the device to a power saving state;
If it is determined by the determination means that the printing requester has a high printing frequency, the shift to the second power saving mode is controlled after the shift to the first power saving mode,
The shift to the second power saving mode is controlled without shifting to the first power saving mode when the determination unit determines that the printing frequency of the print requester is low. Item 7. A printing apparatus according to any one of Items 1 to 6. In a power saving control method for a printing apparatus that receives print data from a plurality of host terminals, executes print processing based on the print data, and can set a power saving transition time from the end of printing to a power saving mode.
The printer identification information is extracted by the extracting means from the print data received from the host terminal,
The determination means determines the printing frequency of the print requester based on the printer identification information extracted by the extraction means,
If the determination means determines that the print requester has a high printing frequency, the power saving transition time corresponding to the print requester is set longer by the power saving transition time setting means, and the determination request means When the printing frequency is determined to be low, the power saving transition time corresponding to the print requester is set shorter by the power saving transition time setting means.

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