EP0500520B1 - Procede de fonctionnement d'un dispositif d'enregistrement alimente par au moins une pile rechargeable - Google Patents

Procede de fonctionnement d'un dispositif d'enregistrement alimente par au moins une pile rechargeable Download PDF

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Publication number
EP0500520B1
EP0500520B1 EP89911989A EP89911989A EP0500520B1 EP 0500520 B1 EP0500520 B1 EP 0500520B1 EP 89911989 A EP89911989 A EP 89911989A EP 89911989 A EP89911989 A EP 89911989A EP 0500520 B1 EP0500520 B1 EP 0500520B1
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EP
European Patent Office
Prior art keywords
recording device
state
accumulator
recording
data
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.)
Expired - Lifetime
Application number
EP89911989A
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German (de)
English (en)
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EP0500520A1 (fr
Inventor
Ngoc Quang Pham
Walter Eiler
Friedrich-Wilhelm Drees
Mohamed Al-Khatib
Wolfgang Pekruhn
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0500520A1 publication Critical patent/EP0500520A1/fr
Application granted granted Critical
Publication of EP0500520B1 publication Critical patent/EP0500520B1/fr
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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control

Definitions

  • the invention is therefore based on the object of providing a method for operating a recording device fed by at least one rechargeable accumulator, with which the highest possible number of recording processes feasible and deep discharge of the rechargeable batteries is safely avoided.
  • a method for operating a recording device fed by at least one rechargeable accumulator with a charger that can be switched on and off, a controller, a main switch for starting or stopping the recording device and with at least one electrical switch for separating the recording device from the one Accumulator wherein the recording device is put into a waiting state or into a record-ready state after commissioning, provided the charge state of the accumulator is above a limit value sufficient for a recording process, the recording device is put into the waiting state after commissioning, in which the energy consumption the controller - compared to the state ready for recording - is reduced, and the accumulator is charged if the state of charge of the accumulator is below the limit value and the charger is switched on, the recording device is switched from the waiting state to the recordable state when an activation signal occurs, provided the charging state of the battery is above the limit value, the recording device is switched from the recording state to the waiting state when a deactivation signal occurs , and the recording device is brought into the electrically switched
  • the control can be put into an energy-saving mode (waiting state), for example, by switching semiconductor components of the control into the tri-state mode.
  • a suitably designed processor which monitors the control, the Energy consumption the clock frequency can be lowered;
  • a processor is, for example, the DMOS processor M 68000 described in the article "Apple's Portable: It Comes Later, But It Comes" to the Frankfurter Thompsone Science from September 26, 1989, page T1.
  • the recording device When the recording device is started up, the recording device is first set to the ready-to-record operating state, provided the battery has a sufficient charge. From this, the recording device is put into the waiting state by the deactivation signal if no recording process takes place within a comparatively short time (for example a few seconds). After commissioning, the recording device could in principle only be put into the waiting state and, if necessary, from this into the ready-to-record state by the activation signal.
  • the rate of discharge of the batteries is thus reduced, which leads to a discharge in accordance with a much more favorable discharge characteristic.
  • the accumulator is recharged in the waiting state, so that the accumulator is not operated in the area of extensive discharge. Because the recording device is set to the electrically switched-off state when the battery charge level is below the limit value and the charger is switched off, deep discharge of the battery is reliably avoided.
  • a further reduction in the energy consumption of the recording device is achieved in that the recording device is brought into the electrically switched-off state if the recording device has remained in the waiting state continuously for a predeterminable waiting time.
  • This ensures an automatic shutdown of the recording device, for. B. in the event that the user has already finished his work and forgot to shut down the recording device.
  • the waiting time can be predefined by the user, so that the behavior of the recording device in this regard can be individually adapted to the user needs.
  • the electrical switch is open, only an extremely low discharge of the energy store is accepted, which is measured according to the reverse current of the electrical switch and the current for the control logic of the electrical switch. It is advantageous to use a semiconductor switch as the electrical switch, which has the smallest possible reverse current; a SIPMOS field effect transistor (FET) fulfills this requirement, for example.
  • FET SIPMOS field effect transistor
  • the deactivation signal is generated if a transfer of data to a data interface of the recording device has not taken place during a predeterminable period of time.
  • a further advantageous development of the method according to the invention is that the activation signal is generated when data are provided for transfer to the data interface of the recording device.
  • the activation signal can furthermore, for example, when a key on the control panel of the recording device or a device corresponding to the recording device via the data interface is pressed be generated.
  • a circuit-technically particularly simple way of monitoring the state of charge of the accumulator is to determine the state of charge of the accumulator by measuring its output voltage.
  • the charge status of the accumulator can be assessed simply by measuring its charge status by measuring its output voltage before and after a recording process and determining the difference between the measured output voltages. In this way, the risk of deep discharge can be avoided with particular certainty and it can also be determined whether the battery is still sufficiently charged for the subsequent printing process.
  • a recording device 1 is fed by rechargeable batteries 2.
  • a charger 3 can be connected to a connection point 4 for charging the batteries 2 and can thus be switched on or off.
  • a connection of the batteries 2 to the recording device 1 can be established via a main switch 5.
  • a monitoring circuit 10 of the recording device 1 has a flip-flop 11, a SIPMOS field-effect transistor as an electrical switch 12, and a voltage converter 13, a comparator 14, a voltage divider 17, the middle node 18 of which is connected to an input of an analog / digital converter 20, and a controller 22.
  • the controller 22 applies control signals to a print head 23 in accordance with the characters to be printed.
  • a reference voltage dropping across a zener diode is present at an input 25 of the comparator 14, while a further input 26 of the comparator 14 is connected to a middle circuit point 27 of a further voltage divider 28.
  • the A / D converter 20 is activated with a selection signal 31 generated by the controller 22.
  • the digital output signal of the A / D converter 20 is fed to the controller 22 via an 8 bit data line 32.
  • An actuation of the main switch 5, as well as data DATA (recording or control data) arriving at a data interface 35 of the controller 22, leads to the generation of an activation signal in the controller 22, provided - as described below - the state of charge of the batteries 2 has a predetermined limit value (output voltage). exceeds.
  • a control output of the controller 22 is routed via a control line 36 to a clock input of the multivibrator 11.
  • the controller 22 receives status signals via signal lines 38 and 39 about the position of the main switch 5 and whether the charger 3 is switched on or off.
  • the electrical switch 12 After closing the main switch 5, the electrical switch 12 is closed or switched to the conductive state via the flip-flop 11, so that a voltage proportional to the output voltage of the batteries 2 of 16.5 to 21 V is applied to the input 26 of the comparator 14 via the voltage divider 28 (between 3.14 and 4 V) occurs. If this voltage falls below the limit value chosen to be 3.7 V by the reference voltage, an output signal ("accumulator empty") occurs at the output of the comparator 14, which acts via the control 22 and the control line 36 as a signal OFF on the clock input of the flip-flop 11 . With a voltage VCC present at the data input, the OFF signal causes an output signal Q the (low) of flip-flop 11 and thus one "Opening" the electrical switch 12.
  • the recording device 1 If the voltage applied to the input 26 of the comparator 14 is greater than the selected reference voltage, the recording device 1 is in the ready-to-record operating state after the main switch 5 is closed. If data DATA is present at the data interface 35 of the controller 22, it is transmitted to the print head 23, the voltage of the voltage divider 17 at point 18 being fed to the controller 22 via the A / D converter 20 before the recording process begins, and there at least for the Duration of the recording process is saved. After completion of the recording process or a section of a recording process, which is defined, for example, by a predetermined sheet length of a recording medium, the voltage present at point 18 is again fed to the controller 22 for evaluation via the A / D converter 20 and a difference is formed with the first voltage value performed.
  • the controller 22 If this difference exceeds a predetermined value, which is, for example, of the order of 0.1 V, the controller 22 generates the signal OFF, which causes the electrical switch 12 to “open” in the manner already described. From the voltage difference formed in this way, it can be concluded in which area of its discharge characteristic the accumulator is currently being operated. When the area of the complete discharge characterized by a strongly falling discharge characteristic is reached, the difference between the output voltages takes on larger values before and after a recording process. In this way, it can also be assessed whether the accumulator is able to deliver the amount of energy required for the subsequent intended recording process.
  • a predetermined value which is, for example, of the order of 0.1 V
  • the recording device 1 is connected to a corresponding data processing device (not shown) via the data interface 35 of the controller 22, which is designed as a "Centronics" interface.
  • a signal (DATASTROBE) then appears on a so-called DATASTROBE line of the "Centronics" interface, if of the corresponding one Data processing device data to be sent to the recording device 1; this signal is tapped and fed to a threshold value detector. If the threshold value detector is acted upon on the input side by the signal sent on the DATASTROBE line, it generates an activation signal by which the control 22 is activated and takes up its data processing and control functions.
  • the controller 22 monitors the arrival of data in the now activated state; If the data transmission from the corresponding data processing device has ended, a timer in the form of a counter module is started in the controller 22. If the counter reading reaches a predeterminable value, a deactivation signal is emitted, which places the control 22 in an energy-saving waiting state. In this waiting state, the semiconductor components are in a high-resistance state (tri-state) with the exception of the threshold value detector. Furthermore, the printhead 23 is separated from the energy store 2 by an electrical switch, not shown.
  • the semiconductor components are only reset to normal operation by the activation signal, the activation signal also being able to be generated by pressing an operating key of the recording device or when the main switch 5 is closed.
  • the energy consumption of the controller 22 is thus considerably reduced and the discharge of the accumulator is considerably slowed down.
  • the recording device operated according to the method according to the invention can assume states Z1 to Z5, states Z2, Z3 and Z4 being particularly significant for the method according to the invention.
  • State Z1 can be reached by opening the main switch 5 (cf. FIG. 1) from all other states Z2 to Z5 - symbolized by arrow 50.
  • the electrical switch 12 is open; this state can be reached directly from the other states Z1, Z3, Z4 and Z5, which is symbolized by arrow 51. They are in the waiting state Z3 semiconductor components of the controller 22 (see FIG. 1) provided with a tri-state status are set to the tri-state status.
  • the recording device When the charger 3 is switched on, the energy supply of the recording device 1 and, if appropriate, the accumulators 2 are charged by the charger 3 in the waiting state Z3. From a ready-to-record state Z4, the recording device would record the data when it was received; this recording state is designated Z5. After completion of the recording process (state Z5), the recording device returns to the record-ready state Z4.
  • the controller 22 uses the status signal via the signal line 39 to determine whether the charger 3 is switched on at point 4.
  • the recording device 1 is set to the switched-off state Z2 by the “opening” of the electrical switch 12 as a result of the OFF signal from the controller 22 (arrow 51). If, on the other hand, the charger is switched on, the recording device 1 is placed in the waiting state and the batteries 2 are charged by the charger 3 (arrow 52).
  • the charger 3 is therefore only to be dimensioned for the required charging power and is not to be designed to cover the peak energy requirement required during the recording process. The charger 3 can therefore be dimensioned relatively small and thus manufactured inexpensively.

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

Dans un dispositif d'enregistrement (1) alimenté par une pile rechargeable (2), le nombre des opérations d'enregistrement est limité par la capacité de la pile (2). Pour réduire la consommation d'énergie du dispositif d'enregistrement (1) et accroître ainsi sa durée de vie, le dispositif d'enregistrement (1) est placé, pendant les phases sans enregistrement, dans un état d'attente (Z3) où son électronique de commande (22) travaille dans un mode économisant l'énergie. Lorsqu'on branche un chargeur (3), la pile (2) se charge. Un signal d'activation place à nouveau le dispositif d'enregistrement (1) dans un état (Z4) permettant l'enregistrement, à condition que la pile (2) soit suffisamment chargée. Pour réduire à nouveau la consommation d'énergie, on sépare le dispositif d'enregistrement (1) à l'état d'attente (Z3) de la pile (2) par l'ouverture d'un commutateur électrique (12) lorsque ce dispositif est resté à l'état d'attente pendant une période déterminée. L'état de charge de la pile (2) est contrôlé et lorsqu'il devient inférieur à une valeur limite déterminée, il est transféré à l'état électriquement déconnecté (2), lorsque le chargeur (3) est à l'arrêt, et à l'état d'attente (Z3), lorsque le chargeur est en service. Alimentation électrique de dispositifs d'enregistrement.

Claims (6)

  1. Procédé pour le fonctionnement d'un dispositif d'enregistrement (1) qui est alimenté par au moins un accumulateur (2) susceptible d'être rechargé, et qui comporte une unité de charge (3) pouvant être branchée ou débranchée, une unité de commande (22), un commutateur principal (5) servant à la mise en service ou à la mise hors service (Z1) du dispositif d'enregistrement (1), et au moins un commutateur électrique (12) servant à la séparation du dispositif d'enregistrement (11) de l'accumulateur (2), du type dans lequel
    -- le dispositif d'enregistrement (1) est déplacé, après la mise en service, dans un état d'attente (Z3) ou dans un état (Z4) de disponibilité à l'enregistrement, jusqu'à ce que l'état de charge de l'accumulateur (2) soit au-dessus d'une valeur limite suffisante pour un processus d'enregistrement,
    -- le dispositif d'enregistrement (1) est déplacé, après la mise en service, dans l'état d'attente (Z3), dans lequel l'apport d'énergie de l'unité de commande (22) - comparable à l'état (Z4) de disponibilité à l'enregistrement
    - est réduit, et l'accumulateur (2) est chargé, jusqu'à ce que l'état de charge de l'accumulateur (2) soit endessous de la valeur limite et que l'unité de charge (3) soit branchée,
    -- le dispositif d'enregistrement (1) est déplacé, lors de l'apparition d'un signal d'activation, de l'état d'attente (Z3) dans l'état (Z4) de disponibilité à l'enregistrement, jusqu'à ce que l'état de charge de l'accumulateur (2) soit au-dessus de la valeur limite,
    -- le dispositif d'enregistrement (1) est déplacé, à l'apparition d'un signal de désactivation, de l'état (Z4) de disponibilité à l'enregistrement, dans l'état d'attente (Z3), et
    -- le dispositif d'enregistrement est déplacé, par l'intermédiaire du commutateur électrique (12), dans l'état électrique (Z2) de débranchement, si l'état de charge de l'accumulateur est en-dessous de la valeur limite et si l'unité de charge est débranchée.
  2. Procédé suivant la revendication 1, caractérisé en ce que le dispositif d'enregistrement (1) est déplacé dans l'état électrique (Z2) de branchement, si le dispositif d'enregistrement (1) est maintenu dans l'état d'attente (Z3), sans interruption et pour une durée d'attente susceptible d'être prédéterminée.
  3. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le signal de désactivation est créé si, pendant un intervalle de temps susceptible d'être prédéterminé, un transfert de données (DATA) n'est pas effectuée, au niveau de l'interface de données (35) du dispositif d'enregistrement (1).
  4. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le signal d'activation est créé s'il est prévu des données (DATA) destinées au transfert dans l'interface de données (35) du dispositif d'enregistrement (1).
  5. Procédé suivant l'une des revendications précédentes, caractérisé en ce que l'état de charge de l'accumulateur (2) est déterminé par mesure de sa tension de sortie.
  6. Procédé suivant l'une des revendications précédentes, caractérisé en ce que l'état de charge de l'accumulateur (2) est déterminé par mesure de sa tension de sortie, avant et après un processus d'enregistrement, et par formation de la différence entre les tensions de sortie mesurées.
EP89911989A 1989-11-02 1989-11-02 Procede de fonctionnement d'un dispositif d'enregistrement alimente par au moins une pile rechargeable Expired - Lifetime EP0500520B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1989/000699 WO1991006430A1 (fr) 1989-11-02 1989-11-02 Procede de fonctionnement d'un dispositif d'enregistrement alimente par au moins une pile rechargeable

Publications (2)

Publication Number Publication Date
EP0500520A1 EP0500520A1 (fr) 1992-09-02
EP0500520B1 true EP0500520B1 (fr) 1994-02-09

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EP89911989A Expired - Lifetime EP0500520B1 (fr) 1989-11-02 1989-11-02 Procede de fonctionnement d'un dispositif d'enregistrement alimente par au moins une pile rechargeable

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US (1) US5449238A (fr)
EP (1) EP0500520B1 (fr)
JP (1) JPH05501992A (fr)
DE (1) DE58906957D1 (fr)
WO (1) WO1991006430A1 (fr)

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Also Published As

Publication number Publication date
WO1991006430A1 (fr) 1991-05-16
JPH05501992A (ja) 1993-04-15
US5449238A (en) 1995-09-12
DE58906957D1 (de) 1994-03-24
EP0500520A1 (fr) 1992-09-02

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