EP0453957B1 - Remote-control home electronics device - Google Patents

Remote-control home electronics device Download PDF

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Publication number
EP0453957B1
EP0453957B1 EP19910106197 EP91106197A EP0453957B1 EP 0453957 B1 EP0453957 B1 EP 0453957B1 EP 19910106197 EP19910106197 EP 19910106197 EP 91106197 A EP91106197 A EP 91106197A EP 0453957 B1 EP0453957 B1 EP 0453957B1
Authority
EP
European Patent Office
Prior art keywords
remote
battery
control
electronics device
home electronics
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
EP19910106197
Other languages
German (de)
French (fr)
Other versions
EP0453957A2 (en
EP0453957A3 (en
Inventor
Ari Heikkinen
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.)
Nokia Consumer Electronics Ltd
Original Assignee
Nokia Consumer Electronics Ltd
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 Nokia Consumer Electronics Ltd filed Critical Nokia Consumer Electronics Ltd
Publication of EP0453957A2 publication Critical patent/EP0453957A2/en
Publication of EP0453957A3 publication Critical patent/EP0453957A3/en
Application granted granted Critical
Publication of EP0453957B1 publication Critical patent/EP0453957B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/181—Prevention or correction of operating errors due to failing power supply

Description

  • The present invention relates to a remote-control home electronics device and to the remote-control device connected with it.
  • Remote-control home electronics devices, such as e.g. television sets, videorecorders, and sound reproducers, are more and more left without any local keyboards and then it is important that the remote control device is operating reliably and without any surprises. The most harmful problem in this connection is that the battery of the remote-control device will weaken and lose power when just in operation so that the use of the device to be controlled may even become impossible. The problem is deteriorated by the fact that the device itself may often operate so well that the battery of the remote control device may become exhausted without any gradually occurring symptoms to be identified.
  • In general, for observing the state of the battery of a portable device like a remote-control device the known arrangement is to provide e.g. a light emitting diode (LED) in connection with the battery but the disadvantage of this arrangement is that it will also add to the loads effecting the battery.
  • DE-A-2458866 discloses an antitheft alarm system where the sensor units are normally switched off, but are activated through a reed relay or similar when the object to be watched is moved.
  • The said device is different from the kind of devices to which the invention is related in that it mainly pertains to an alarm sensor. In addition, the known devicers the draw back that the power consumption is relatively high.
  • The aim of the present invention is to eliminate these problems and provide such a battery state monitoring method that is able to indicate on time how the battery is weakening, and that will not create any extra load the battery.
  • This objective is achieved by the characterizing portion of claim 1.
  • The invention is described in the following in more detail and by using an example, with reference to the annexed drawings where
    • Fig. 1 shows a block diagram of the arrangement according the invention;
    • Figs. 2a-e show the dependence of the transmitted pulses of the condition of the battery, and
    • Figs. 3 and 4 show the operations of the monitoring circuit processor in the form of a flow chart diagram.
  • In Fig. 1 the reference number 1 indicates a remote control transmitter operating with infra-red light, the number 2 indicates a respective remote-control receiver that is a part of a home electronics device 6. The receiver 2 additionally comprises, included in the device itself, an observing circuit 3 for the battery having threshold value setting means 4 and alarm means 5.
  • It is obvious that the battery condition cannot be monitored e.g. by observing the amplitudes of the transmitted signal, as the amplitude or the strength of the signal is depending on the respective distance between the remote-control device and the remote-controlled electronics device. Instead, the transmitting circuit of the remote-control device 1 may be carried out so that the relative form of the signal or its relative timing, as e.g. the duration of the pulse or the spaces between the transmitted pulses etc., is changing when the input voltage is changing, i.e. depending on the condition of the battery.
  • This is illustrated by Fig. 2. The figure a) only shows in principle the transmission of the control signal in pulse form from the battery-driven remote-control device to the receiving apparatus. The figure b) shows the dependence of the relative pulse duration of the battery voltage and the figure c) the dependence between the battery voltage and the code length of the transmitted control message. The figure d) shows the dependence between the relative pulse duration and the code length and, finally, the figure e) shows the change of the pulse error in time when the battery is losing power.
  • Thus, according to the invention, the receiver, in addition to the normal receiving operations, also observes the changes caused by the ageing of the battery in the received signal and compares the measured changes with the advancement of a standardized change pattern, based on the known changes in the battery caused by its ageing. When the measured change exceeds a preset threshold value of the standardized change in circuit 4, and when the battery condition can be assumed to be near the maximum operative age, the user will receive an alarm by circuit 5 indicating the low battery condition. This alarm may be e.g. a visual display by a warning light or on a display screen or, in the case of a television set, on the television screen or by e.g. a sound signal.
  • Fig. 3 shows the operations of the processor of the monitoring circuits 3, 4 in the form of a flow chart. The monitoring circuit observes a selected signal parameter dependent on the voltages of the battery and gives an alarm if the parameter exceeds the permitted limit.
  • Fig. 4 shows the corresponding flow chart in the case when the bit durations of the transmitted control signals are under specific monitoring.
  • Thus, it is essential in the present invention that the indication will take place before the battery power is so low that the remote-control device will no more operate reliably. This enables the user to provide a new battery on time and assure the operation of the remote-control device without problems.

Claims (4)

  1. A remote-control home electronics device, controllable with a separate battery-operated remote control-device characterized in that in order to avoid additional loading of the battery a condition monitoring circuit (3, 4) for the battery of the remote-control device (1), is provided in the electronics device (6) itself, said circuit observing the battery power condition on the basis of the form of the signal of the remote-control device, and/or the duration of the transmitted pulses and/or the intervals between the pulses.
  2. A home electronics device according to claim 1, characterized in that it comprises a visual display showing too low battery voltage.
  3. A home electronics device according to claim 1 or 2, characterized in that a too low battery charge is indicated by a sound signal.
  4. A remote-control device of a home electronics device according to claim 1, characterized in that the signal transmitter circuit (10) thereof is designed so that the signal form, e.g. the duration of and/or the intervals between the trans-mitted control pulses, varies with the voltage of the battery of the remote-control device (1).
EP19910106197 1990-04-20 1991-04-18 Remote-control home electronics device Expired - Lifetime EP0453957B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI902009A FI85632C (en) 1990-04-20 1990-04-20 Remote controlled entertainment electronics device
FI902009 1990-04-20

Publications (3)

Publication Number Publication Date
EP0453957A2 EP0453957A2 (en) 1991-10-30
EP0453957A3 EP0453957A3 (en) 1992-04-08
EP0453957B1 true EP0453957B1 (en) 1994-08-03

Family

ID=8530311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910106197 Expired - Lifetime EP0453957B1 (en) 1990-04-20 1991-04-18 Remote-control home electronics device

Country Status (4)

Country Link
EP (1) EP0453957B1 (en)
DE (1) DE69103193T2 (en)
ES (1) ES2057647T3 (en)
FI (1) FI85632C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4202759C2 (en) * 1992-01-31 1994-04-14 Bosch Gmbh Robert Receiving device for receiving wirelessly transmitted information
KR0134174B1 (en) * 1992-04-30 1998-04-27 사또우 후미오 Receiving device for remote control signal
FR2753854B1 (en) * 1996-09-20 1998-10-30 WIRELESS ELECTRONIC DOOR
US6256479B1 (en) 1997-12-19 2001-07-03 Comptoir Francais De L'interphone Wireless door intercom

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2458866A1 (en) * 1974-12-12 1976-06-16 Spinner Georg Burglar alarm using magnetic field and contact plate - plate displaced relay supply and send H.F. signals to central receiver
US4056815A (en) * 1976-02-03 1977-11-01 Westinghouse Electric Corporation Battery operated transmitter circuit
US4207524A (en) * 1977-12-23 1980-06-10 Purchase Francis J Radio coupled device for detecting and analyzing weak transmissions
DE3334820A1 (en) * 1983-09-26 1985-04-04 Siemens AG, 1000 Berlin und 8000 München SIGNALING SYSTEM WITH WIRELESS SIGNAL TRANSFER BETWEEN A BATTERY-OPERATED SUBSTATION AND A MAINS-OPERATED MAIN STATION
US4622544A (en) * 1985-05-13 1986-11-11 Lifeline Systems, Inc. Low battery indicator

Also Published As

Publication number Publication date
DE69103193T2 (en) 1994-12-08
EP0453957A2 (en) 1991-10-30
FI902009A0 (en) 1990-04-20
DE69103193D1 (en) 1994-09-08
FI902009A (en) 1991-10-21
FI85632B (en) 1992-01-31
FI85632C (en) 1992-05-11
ES2057647T3 (en) 1994-10-16
EP0453957A3 (en) 1992-04-08

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