EP1057652A2 - Drucker und Ladegerät - Google Patents

Drucker und Ladegerät Download PDF

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Publication number
EP1057652A2
EP1057652A2 EP00304308A EP00304308A EP1057652A2 EP 1057652 A2 EP1057652 A2 EP 1057652A2 EP 00304308 A EP00304308 A EP 00304308A EP 00304308 A EP00304308 A EP 00304308A EP 1057652 A2 EP1057652 A2 EP 1057652A2
Authority
EP
European Patent Office
Prior art keywords
power supply
supply unit
main power
printer
backup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00304308A
Other languages
English (en)
French (fr)
Other versions
EP1057652A3 (de
EP1057652B1 (de
Inventor
Syuji Otsuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Publication of EP1057652A2 publication Critical patent/EP1057652A2/de
Publication of EP1057652A3 publication Critical patent/EP1057652A3/de
Application granted granted Critical
Publication of EP1057652B1 publication Critical patent/EP1057652B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns

Definitions

  • the present invention relates to a printer and a charging device of a backup power supply for the printer. Especially, the present invention relates to a charging system of the backup power supply such as a rechargeable battery for supplying power to a Real Time Clock IC and the like in the printer.
  • a switching regulator is generally used as the main power supply of the ink jet printer.
  • the switching regulator of the ink jet printer oscillates intermittently at voltage wave with low duty ratio while the main switch is OFF.
  • CPU and the like monitor the state of the main switch provided to the secondary side of the power supply.
  • the main switch is turned off, the CPU allows the capping process of the print head to perform, and then sends a prescribed signal to the main power supply.
  • the main power supply receives the signal from the CPU and transits to the above-mentioned intermittent oscillation state.
  • the printer and the like it is necessary for the printer and the like to perform a backup operation for a memory, when the main power supply is turned off.
  • the backup operation operational information of the printer is recorded to the memory such as an EEPROM.
  • the ink jet printer has a Real Time Clock IC, which is hereinafter called as RTC.
  • the RTC is used to perform several types of pumping operation for adjusting the suction amount of the ink in accordance with the length of unused time and to print printing time to ends of print papers based on unique commands from a host computer.
  • the RTC is a digital IC which outputs current time, for example, xx(hour) xx(minute) xx (second) on xx(month) xx(day), xx(year).
  • the ink jet printer has to supply power to the RTC, even if the main switch is OFF.
  • electric apparatuses such as the printer is provided with an electric double layer capacitor or a rechargeable battery as a backup power supply.
  • the backup power supply is charged while the main power supply is ON, and continuously drives the RTC or performs the backup operation for the memory by using the charged power when the main switch is turned off.
  • the RTC in the printer is continuously driven.
  • a first example has the rechargeable battery such as a Lie battery or a Ni-Cd battery in the printer, and allows the RTC to drive by using power that the rechargeable battery discharged.
  • a printer of the first example is provided with a Li battery 81 as shown in Fig. 1.
  • a RTC 83 is driven by the power supplied constantly from the Li battery 81.
  • the RTC 83 outputs a digital signal 87 showing the current time to a CPU 85 when a prescribed signal 86 is inputted from the CPU 85.
  • a printer of a second example, as shown in Fig. 2 has a high performance capacitor, which is called a super capacitor, a gold capacitor, electric double layer capacitor, or the like.
  • the capacitor is charged while the main switch of the printer is ON, and the RTC is continuously driven by electric charge charged to the capacitor when the main switch of the printer is turned off.
  • the RTC 93 is driven by the power supplied from the main power supply 98. While the main supply is ON, the capacitor 91 is charged by the power supplied from the main power supply 98. The main switch of the printer is turned off, and the RTC 93 is continuously driven by the electric charge charged to the capacitor 91. Similarly to the first example, when a prescribed signal 96 is inputted from the CPU 95, the RTC 93 outputs to the CPU 95 a digital signal 97 indicating the current time.
  • a first object of the present invention is to provide a printer having a backup power supply and a charging device which can realize low price and low power consumption, without using a primary battery impossible to recharge.
  • a second object of the present invention is to provide a printer and a charging device which can realize low power consumption by restraining the charging time to the shortest time.
  • a printer comprising:
  • a printer comprising:
  • Futhermore a charging device of a backup power supply for a printer which can supply power for performing a prescribed backup operation to the printer having a main power supply unit capable of taking at least two states of ON state and a prescribed sleep state when a main power supply unit is not in ON state, and which can perform charge/discharge comprising
  • Futhermore a printer comprising:
  • Futhermore a charging device of a backup power supply for a printer which can supply power for performing a prescribed backup operation to the printer having a main power supply unit capable of taking at least two states of ON state and a prescribed sleep state when a main power supply unit is not in ON state, and which can perform charge/discharge comprising:
  • the present invention for example, even if the main switch is turned off by user, it is possible to safely perform a prescribed backup operation, to reduce use of components such as a primary battery undesirable for environment, and to realize low cost and low power consumption. Furthermore, it is possible to realize the charging device of the backup power supply for supplying power to perform a prescribed backup operation for the printer by a simplified configuration. Accordingly, the industrial value of the present invention is very large. Furthermore, because the present invention controls the ON period of the main switch based on hysteretic information, it is possible to shorten charging time and to reduce power consumption.
  • the ink jet printer has a printer controller 2, a print engine 4, a main power supply unit 6, and a RTC unit 8.
  • the printer controller 2 has a CPU 10, a ROM 12, a RAM 14, an EEPROM 16, a mechanic interface block (mechanic I/F) 18, and a host interface block 20. These are connected to each other via a bus 22.
  • the print engine 4 has a print head 42, a carriage mechanism consisted of a carriage 43 and the like, a paper feeder mechanism consisted of a paper feeder (PF) motor 44 and the like.
  • the paper feeder mechanism has the PF motor and a paper feeder roller (unshown), and sends out a print recording medium such as a recording paper 45 in order to scan the print head 42 in sub scanning direction.
  • the carriage mechanism has a carriage 43 for mounting the print head 42 and a carriage (CR) motor 43a for allowing the carriage 43 to run via a timing belt and the like, in order to scan the print head 42 in main scanning direction.
  • the print head 42 spits out fine ink dews by using a piezoelectric element.
  • the carriage 43 returns to home position in a prescribed case, in order to perform various maintenance for the print head 42. For example, when cutting off the power, at the state the carriage 43 has returned to the home position, a capping process is performed. In this capping process, an ink spray portion is capped.
  • the main power supply unit 6 has a switching regulator (unshown) and the like.
  • the main power supply unit 6 is supplied with alternating power from commercial power supply (unshown).
  • the main power supply unit 6 supplies 42V to the print head 42 of the print engine 4 and the like, and 5.0V or 3.3V to the printer controller 2.
  • the main power supply unit 6 is connected to a panel switch 5 provided to the printer panel.
  • the panel switch 5 outputs ON/OFF signals alternatively by each time when user operates the panel switch 5.
  • An ON switch and an OFF switch are separately provided to the panel switch 5.
  • the main power supply unit 6 is turned on/off by receiving the signal from the panel switch 5. Even if the panel switch 5 is turned off, as long as the power supply plug 32 is not pulled out, the main power supply unit 6 enters a prescribed sleep state.
  • the prescribed sleep state means that the panel switch 5 is turned off, the supply of the power to the printer mechanism such as the printer engine is cut off, a little power is supplied to CPU 10 and the like.
  • the main power supply oscillates intermittently, as described above.
  • the RTC unit 8 has a RTC 34 and a backup power supply 36.
  • the backup power supply 36 has a rechargeable battery 36a and a diode 36b, and acts when the main power supply unit 6 is OFF.
  • the RTC 34 continuously acts by power supplied from the backup power supply 36, even while the main power supply unit 6 is cut off.
  • the RTC 34 outputs a digital signal 34a indicating the current time to a CPU 10 when a prescribed signal 10a is supplied from the CPU 10.
  • a first event is an event in case that the voltage of the backup power supply 36 becomes low.
  • a second event is an event in case that a prescribed time passes off after entering the sleep state.
  • Fig. 4 is a block diagram showing schematic configuration of a first embodiment relating to a charging device of a backup power supply.
  • the charging device of the first embodiment has a feature in which the main power supply unit 6 is turned on by a signal from the RTC 34 by using the above-mentioned first event as a trigger, and then the rechargeable battery 36a is continuously charged during required minimum supplementary charging time necessary to complete the charge for the rechargeable battery 36a, and then the main power supply unit 6 returns again to a intermittent oscillation state.
  • the charging device of the first embodiment has a main power supply unit (PS) 6, a CPU 10, a RTC 34, a first switch 37, and a second switch 38.
  • the main power supply 6, for example, supplies 42V to a printer driver such as a printer engine 4 and a secondary voltage of 5.0V or 3.3V to a logic circuit such as a printer controller 2.
  • the CPU 10 checks the state of the panel switch 5 of the printer. When the main power supply unit 6 is turned on from the sleep mode, the CPU 10 performs various control operations depending on whether the power ON depends on the panel switch 5 or the RTC 34.
  • the RTC 34 of the present embodiment has a timer 34B and a comparator 34C.
  • the comparator 34C checks the output voltage of the rechargeable voltage 36a.
  • the comparator 34C compares the output voltage of the rechargeable battery 36a with a prescribed reference voltage RefV which is, for example, (1.5V+ ).
  • the RTC 34 When the comparator 34C determines that the output voltage of the rechargeable battery 36a underruns the reference voltage RefV, the RTC 34 outputs a power ON signal 34d, sets the second switch 38 to ON, and returns the main power supply unit 6 to ON state.
  • the power ON signal 34d is outputted, for example, for 3 minutes, and the main power supply unit 6 is set to ON only during 3 minutes.
  • the timer 34B counts during 3 minutes as a prescribed supplementary charging time.
  • the first switch 37 has the panel switch 5 of the printer shown in Fig. 3 and another switch 37a which opens and shuts simultaneously working with the panel switch 5.
  • the panel switch 5 When the panel switch 5 is in OFF, as long as the outlet is not pull out, the main power supply unit 6 transits to the intermittent oscillation state. After then, if the panel switch 5 is turned on, the main power supply unit 6 returns to state for outputting a normal secondary voltage.
  • the switch 37a When the panel switch 5 is turned on/off, the switch 37a opens or shuts simultaneously working with the panel switch 5. Because of this, as shown in Fig. 4, the signal 37b for transmitting ON/OFF of the panel switch 5 is outputted, and is transmitted to the CPU 10.
  • Fig. 5 is a flowchart showing processes and operations of the charging device according to the present embodiment.
  • the processes and operations of the charging device of Fig. 4 will be described.
  • the printer enters the sleep mode (S301), thereby becoming the above-mentioned intermittent oscillating state.
  • the sleeping mode for example, when the panel switch 5 is turned on by user, or when the main power supply unit 6 is turned on by a power ON signal 34d from the RTC 34 (S302), it is determined whether the power ON depends on the RTC 34 or the panel switch 5 (S303).
  • the power ON state is continued for 3 minutes (S304).
  • the charge for the rechargeable battery 36a is performed for 3 minutes.
  • the main power supply unit 6 is turned off after 3 minutes.
  • the panel switch 5 returns to OFF state.
  • the CPU 10 always checks whether the panel switch 5 is turned on or not (S305). If the panel switch 5 keeps OFF state, the process of the step S301 is performed, thereby continuing the above-mentioned sleep mode.
  • the CPU 10 checks whether or not the panel switch 5 is turned off (S306). If the panel switch 5 is turned off (Yes in step S306), the CPU 10 waits until the processes necessary to cut off the supply of power for the printer, for example, the capping process is completed.
  • step S307 it is determined whether more than three minutes passed off (S308). If determined that more than three minutes passed off (Yes in S308), process of the step S301 is performed to continue the above-mentioned sleep mode.
  • the CPU 10 waits while checking the panel switch 5 until the remaining time to three minutes passes off (S309). That is, the CPU 10 checks whether or not the panel switch 5 is turned off (S310), as long as the panel switch 5 is not turned off (No in step S310), the process of the step S306 is again performed. When the panel switch 5 is turned off (Yes in step S310), the process of the step S301 is again performed, thereby continuing the above-mentioned sleep mode.
  • the charging device of the present embodiment during the sleeping mode (energy saving mode) in which the main power supply unit of the printer performs the intermittent oscillation, even if voltage of the rechargeable battery 36a becomes low, it is possible to automatically allow the main power supply unit 6 to transit to ON state, and to charge the rechargeable battery 36a by using the power supplied from the main power supply unit 6.
  • a charging device of a second embodiment has a feature in which the above-mentioned second event is used as a trigger. That is, when becoming the intermittent oscillating state depending on the power OFF, by each of the constant period (supplementary charging interval time), the CPU generates a signal during a constant time (supplementary charging time). The main power unit 6 is turned on/off by the signal from the CPU.
  • the charging device of the second embodiment has a third switch 39, as shown by a dotted line in Fig. 4.
  • the third switch 39 is turned on by a prescribed supplementary charging signal 10h from the CPU 10.
  • the main power supply unit 6 returns from the intermittent oscillating state to the state outputting the normal secondary voltage.
  • the supplementary charging signal 10h is sent only for 3 minutes, for example, by 24 or 10 hours, during the intermittent oscillating state.
  • the processes and the operations of the charging device according to the second embodiment is the same as that of the first embodiment, except that the CPU 10 performs the processes of steps S303 and S304 of Fig. 5. Because of this, detailed description relating to the processes and the operations of the second embodiment will be omitted.
  • the CPU 10 may generate the above-mentioned signal based on the result of executing prescribed control instruction groups (program) stored in the ROM 12 with reference to time information from the RTC 34 or the timer 34B which may be provided in the CPU 10.
  • a third embodiment uses an electric double layer capacitor as the backup power supply for allowing the above-mentioned RTC to continuously run during power OFF. Optimization of the charging time for the electric double layer capacitor is realized by managing and referring hysteretic information relating to voltage between ends of the electric double layer capacitor.
  • the RTC and the electric double layer capacitor of the third embodiment is built in the ink jet printer, similarly to the first and second embodiments. Because the other configuration of the third embodiment is the same as that of the first and second embodiments, the detailed description will be omitted. First of all, a first example of control method using the hysteretic information according to the present embodiment will be described hereinafter.
  • Fig. 6 is a diagram showing a change for time of voltage between ends of the electric double layer capacitor.
  • the electric double layer capacitor is being already charged at state that the main power supply unit 6 is turned on as referred to 401, if the main power supply unit 6 is turned off as referred to 402, the voltage between ends of the electric double layer capacitor becomes low gradually, as shown in Fig. 6.
  • a minimum voltage shown in Fig. 6 expresses a maximum voltage that operation of the RTC stops.
  • the simplest example of the hysteretic control is the case that the main power supply unit 6 is turned on when voltage between ends of the electric double layer capacitor has lowered till the minimum voltage.
  • the hysteretic information that operation of the RTC 34 stopped is obtained.
  • zero is set. That is, the timer such as a CPU timer is set to zero, and the charging time Tch becomes full charge after 3 minutes pass off.
  • the printer continues to run, and the main power supply unit 6 is turned off as an event at any time as shown in 406. In this case, it is unnecessary to charge further for 3 minutes. As shown in the same drawing, for example, when the event which is turned off on the condition of Tch 3 minutes occurs, this event means that it is unnecessary to maintain ON any longer. Accordingly, at this point when charge of the electric double layer capacitor finished, the discharge begins as shown in 406 and 413.
  • Fig. 7 is a diagram showing change of voltage between ends of the electric double layer capacitor by charge/discharge.
  • a horizontal axis of Fig. 7 is a time (t), and a vertical axis of Fig. 7 is the voltage (v) between ends of the electric double layer capacitor.
  • Fig. 8 is a block diagram showing schematic configuration of a third embodiment of a charging device according to the present invention.
  • the charging device of Fig. 8 has power supply unit 601, a CPU 602, an electric double layer capacitor 603 functioned as a backup power supply, and a RTC 604.
  • the main power supply unit 601 Inside of the main power supply unit 601 is provided with a compact power supply 607 for detecting on/off condition of a switch 601a. When ON of the switch 601a is detected, the electric double layer capacitor 603 is charged, and the power is supplied to each part of the printer.
  • the main power supply unit 601 begins the supply of the power by signal from the RTC 604.
  • a voltage detecting section 604a for detecting the charging voltage of the electric double layer capacitor 603.
  • a comparison determining section 602a for determining whether or not the charging voltage detected by the voltage detecting section 604a is lower than a prescribed reference voltage
  • a charge indicating section 602b for allowing the main power supply unit 6 to turn on when determined to be low.
  • the voltage detecting section 604a, the comparison determining section 602a, and the charge indicating section 602b correspond to hysteretic management means.
  • the main power supply unit 6 begins the supply of the power not only in case the switch 601a is turned on, but also by the signal from the RTC 604.
  • the CPU 602 restarts.
  • the CPU 602 can detect the reason why the main power supply unit 601 has begun the supply of the power by receiving the signal from the RTC 604.
  • the third embodiment detects the condition of the electric double layer capacitor based on time.
  • the CPU 602 has to detect the above-mentioned minimum voltage and whether or not the RTC 604 stopped.
  • the present invention is not limited certain embodiments described above, and is applicable to other embodiments in the range of Claims described after.
  • the main power supply unit when the voltage of the backup power supply has lowered, by using the first event as the trigger, an example which turns on the main power supply unit based on the signal from the RTC and performs supplementary charge has been described.
  • the main power supply unit when the prescribed time has passed off after entering the sleep state, by using the second event as the trigger, the main power supply unit is turned on by the signal from the CPU to perform supplementary charge.
  • the main power supply unit in case that a prescribed time passed off after entering the sleep state, by using the second event as the trigger, the main power supply unit may be turned on by the signal from the RTC to perform supplementary charge.
  • charging systems for allowing the RTC to continuously run when the main power supply unit 6 is not in ON state has been described.
  • Objects that the rechargeable battery supplies the power are not limited.
  • backup operation of the memory and the like may be performed by using the rechargeable battery.
  • the backup power supply is required that it is possible to repeat charge/discharge and to supply the power for performing a prescribed backup operation when the main power supply unit 6 is not in ON state. If these requirement are filled, any besides the rechargeable battery and the electric double layer capacitor is applicable as the backup power supply.
  • the printer has the charging device, and the charging device is constituted of the CPU in the printer, and the timer and the comparator in the RTC has been described.
  • the charging device may be constituted as an external unit of the printer.
  • the present invention has been described as an example of the ink jet printer for performing the capping.
  • the present invention is also applicable to other printers such as a laser printer which has the main power supply unit with ON state and sleep state, and can repeat charge/discharge. That is, the present invention is applicable to any types of the printers which has the backup power supply for supplying the power to perform a prescribed backup operation when the main power supply unit is not ON state.

Landscapes

  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Photoreceptors In Electrophotography (AREA)
EP00304308A 1999-05-26 2000-05-22 Drucker und Ladegerät Expired - Lifetime EP1057652B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14723399 1999-05-26
JP14723399 1999-05-26

Publications (3)

Publication Number Publication Date
EP1057652A2 true EP1057652A2 (de) 2000-12-06
EP1057652A3 EP1057652A3 (de) 2001-08-22
EP1057652B1 EP1057652B1 (de) 2004-10-13

Family

ID=15425594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00304308A Expired - Lifetime EP1057652B1 (de) 1999-05-26 2000-05-22 Drucker und Ladegerät

Country Status (3)

Country Link
EP (1) EP1057652B1 (de)
AT (1) ATE279322T1 (de)
DE (1) DE60014764T2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100527563C (zh) * 2006-05-02 2009-08-12 联发科技股份有限公司 电源供应器
CN101431417B (zh) * 2007-11-08 2011-02-09 瑞昱半导体股份有限公司 网络处理器及其省电方法
JP2012237821A (ja) * 2011-05-10 2012-12-06 Ricoh Co Ltd 画像形成装置
US20150314593A1 (en) * 2012-12-13 2015-11-05 Konica Minolta, Inc. Power source control device for inkjet head and inkjet printing apparatus
US9398174B2 (en) 2013-02-28 2016-07-19 Brother Kogyo Kabushiki Kaisha Communication apparatus having an operational-signal cut-off section to prevent a network-event detector from outputting an operational signal
US9558435B2 (en) 2013-06-28 2017-01-31 Brother Kogyo Kabushiki Kaisha Communication apparatus being selectively powered by a main power supply or a back-up power supply depending on the operating mode of the communication apparatus
WO2018067132A1 (en) * 2016-10-05 2018-04-12 Hewlett-Packard Development Company, L.P. Fluid ejection device capping

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106394024B (zh) * 2016-11-22 2018-12-28 重庆品胜科技有限公司 用于便携式标签打印机的供电电源电路系统和工作方法
KR20220008617A (ko) 2020-07-14 2022-01-21 삼성전자주식회사 전원 공급 장치 및 이를 포함하는 전자 장치

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100527563C (zh) * 2006-05-02 2009-08-12 联发科技股份有限公司 电源供应器
CN101431417B (zh) * 2007-11-08 2011-02-09 瑞昱半导体股份有限公司 网络处理器及其省电方法
JP2012237821A (ja) * 2011-05-10 2012-12-06 Ricoh Co Ltd 画像形成装置
US20150314593A1 (en) * 2012-12-13 2015-11-05 Konica Minolta, Inc. Power source control device for inkjet head and inkjet printing apparatus
US9289980B2 (en) * 2012-12-13 2016-03-22 Konica Minolta, Inc. Power source control device for inkjet head and inkjet printing apparatus
US9398174B2 (en) 2013-02-28 2016-07-19 Brother Kogyo Kabushiki Kaisha Communication apparatus having an operational-signal cut-off section to prevent a network-event detector from outputting an operational signal
US9558435B2 (en) 2013-06-28 2017-01-31 Brother Kogyo Kabushiki Kaisha Communication apparatus being selectively powered by a main power supply or a back-up power supply depending on the operating mode of the communication apparatus
WO2018067132A1 (en) * 2016-10-05 2018-04-12 Hewlett-Packard Development Company, L.P. Fluid ejection device capping
CN109803832A (zh) * 2016-10-05 2019-05-24 惠普发展公司有限责任合伙企业 流体喷射装置封盖
US10836156B2 (en) 2016-10-05 2020-11-17 Hewlett-Packard Development Company, L.P. Fluid ejection device capping
US11325371B2 (en) 2016-10-05 2022-05-10 Hewlett-Packard Development Company, L.P. Fluid ejection device capping

Also Published As

Publication number Publication date
DE60014764D1 (de) 2004-11-18
DE60014764T2 (de) 2005-03-10
ATE279322T1 (de) 2004-10-15
EP1057652A3 (de) 2001-08-22
EP1057652B1 (de) 2004-10-13

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