GB2255846A - Power supply protection in paging receiver. - Google Patents
Power supply protection in paging receiver. Download PDFInfo
- Publication number
- GB2255846A GB2255846A GB9125617A GB9125617A GB2255846A GB 2255846 A GB2255846 A GB 2255846A GB 9125617 A GB9125617 A GB 9125617A GB 9125617 A GB9125617 A GB 9125617A GB 2255846 A GB2255846 A GB 2255846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- power supply
- low power
- state
- checking
- buzzer
- 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
Links
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000004044 response Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
- G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
- G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
- G08B3/1025—Paging receivers with audible signalling details
- G08B3/1066—Paging receivers with audible signalling details with other provisions not elsewhere provided for, e.g. turn-off protection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/022—Selective call receivers
- H04W88/023—Selective call receivers with message or information receiving capability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
- H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
Abstract
A method for protecting message data in a paging receiver, in case of a low power supply, includes the steps of checking 3b whether a battery is in a low power state during a normal state of operation, reducing current consumption by cutting off 4b, 4c control signals of a buzzer, a vibration motor and a lamp during a low power supply state, displaying 3d the low power supply state on a display circuit and then returning to the power supply checking step. Therefore, even if data is received when a battery voltage drops below a predetermined reference value, a CPU of a main control circuit may be prevented from being reset due to operation of the buzzer, the lamp and/or the vibration motor. <IMAGE>
Description
POWER SUPPLY PROTECTION
The present invention relates to paging receivers, and more particularly to power supplies thereof.
Generally, a paging receiver is called a "pager", and it has a buzzer, a vibration motor, a lamp and a liquid crystal display circuit, etc, as devices which notify a user of received data when the data are received. The pager receives and demodulates the data when data are applied thereto as radio signals. Then the pager notifies a user of a call by driving the buzzer or the vibration motor, etc, when the data are confirmed as a call to the user's own paper and simultaneously produces the received data on the liquid crystal display circuit. Therefore, when the buzzer or the vibration motor is driven, the user notices the call by confirming the liquid crystal display circuit.
Further. a paging receiver or system usually has a battery as a power supply source and checks whether or not its voltage maintains a reference value by sensing the battery voltage at all times.
Figure 1 of the accompanying diagrammatic drawings is a flow chart for checking the battery voltage in a prior art pager system.
The flow chart in Figure 1 is performed in a central processing unit (hereinafter referred to as CPU) of the pager system which is located in an external memory.
The CPU performs a normal operation in a step 2a, checks the battery voltage in a step 2b and, if the battery voltage is lower than a predetermined reference value after checking the battery voltage in the step 2b, generates a low voltage alert and displays its state on a liquid crystal display circuit in a step 2c. The CPU checks the battery voltage by periodically repeating the operation from step 2a to step 2c.
Meanwhile, the paging receiver has two modes for notifying a user of received data, when the data are applied thereto. One is a normal mode in which the user notices the received data as an audible signal through a buzzer, and the other is a memory mode in which the user notices the received data by physically sensing a vibration caused by driving of a vibration motor.
However, if the battery voltage of the paging receiver is in low state, currents of about 70 mA or 100 mA are typically consumed when the buzzer or the vibration motor in the normal mode or the memory mode is operated, so that the battery voltage may drop greatly. In this case, the paging receiver may be disabled or reset, thereby causing messages being received and previously received and stored to be erased.
However, a method such as is illustrated in the flow chart of Figure 1 could not solve problems occurring in the memory mode or the normal mode, because it detects the low voltage state only when data are received.
Preferred embodiments of the present invention aim to provide a method for preventing the loss of received data even if a power source voltage, e.g, a battery voltage, falls below a predetermined reference value.
According to a first aspect of the present invention, there is provided a method for protecting message data in a paging receiver in case of a low power supply state, the method comprising the steps of:
checking whether a power supply is in a low power supply state, during a normal state of operation;
de-energizing a buzzer, a vibration motor and a lamp included in said paging receiver during said low power supply state, thereby to reduce current flow in the receiver; and
displaying said low power supply state on display means and then returning to said power supply checking step.
According to a second aspect of the present invention, there is provided a method for protecting message data in a paging receiver having normal and memory modes of operation, in case of low power supply state, the method comprising the steps of:
checking whether a power supply is in a low power supply state, during a normal state of operation;
de-energizing first alarm means or second alarm means included in said paging receiver in response to said respective modes, during said low power supply state, thereby to reduce current flow in the receiver; and
displaying said low power supply state on display means, and then returning to said power supply checking step.
Preferably, said first alarm means comprises a vibration motor.
Preferably, said second alarm comprises a buzzer and a lamp.
Preferably, said de-energizing step comprises the steps of:
checking said modes of operation;
generating a buzzer and lamp disable signals when said paging receiver is in said normal mode of operation, thereby to de-energize said buzzer and lamp; and
generating a motor disable signal when said paging receiver is in said memory mode, thereby to de-energize said vibration motor.
The invention also extends to a paging receiver provided with power supply checking and control means adapted to operate in accordance with a method according to any of the preceding aspects of the invention.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to Figures 2 to 4 of the accompanying diagrammatic drawings, in which:
Figure 2 is a block diagram of one example of a paging receiver embodying the present invention;
Figure 3 is a flow chart for illustrating an example of a first method according to the present invention; and
Figure 4 is a flow chart for illustrating an example of a second method according to the present invention.
Referring to Figure 2, a low voltage detection and radio frequency circuit 10 receives a radio frequency signal through an antenna 1, and restores data by amplifying, filtering, demodulating and frequency-converting the received signal, and then detects whether a power supply source is in a low voltage state. An auxiliary control circuit 20 receiving the received data 6 and a low voltage detection signal 7, output from the low voltage detection and radio frequency circuit 10, performs preamble detection and word synchronization detection, etc, and generates a lamp control signal 5, a buzzer control signal 4 and a motor control signal 3. The reference numerals 8 and 9 indicate a battery save control signal and a quick charge control signal respectively.A driving circuit 30, receiving the lamp control signal 5, the buzzer control signal 4 and the motor control signal 3, amplifies currents of these control signals to supply a lamp 33, a buzzer 32 and a vibration motor 31, respectively. A main control circuit 40 supplies data to the auxiliary control section 20, is supplied with data therefrom, and controls each of a number of circuits, and a memory 50 generates data under the control of the main control circuit 40 in a state that a cap code, etc, is previously stored.
A display circuit 60 displays received data under the control of the main control circuit 40. A mode switching circuit 70 assigns a normal mode or a memory mode to the main control circuit 40, and a power source stabilizer 80 supplies the main control circuit 40 and the auxiliary control circuit 20 with operation voltage by controlling a battery 90 voltage in order to operate the main control circuit 40 and the auxiliary control circuit 20. The power regulator 80 may be implemented with SCI7661, single chip, available from
Seiko Epson Co.
Referring to Figure 3, the flow chart includes the steps of checking whether or not the battery voltage is low state in a state of a normal operation performance, reducing current consumption by cutting off the control signals of the buzzer, the vibration motor and the lamp if the battery voltage state is low state as a result of checking the voltage state, displaying low voltage state on the display circuit after performing the current consumption reduction process, and then returning to the voltage checking step.
This embodiment of the present invention will become more apparent from the following description given with reference to the Figures 2 and 3.
The main control circuit 40 operates the paging receiver normally in a step 3a and periodically checks whether or not the voltage of the battery 90 is low state in a step 3b. If the voltage of the battery 90 is low state, the main control circuit 40 advances to a step 3c, and, if the voltage is not low state, the main control circuit 40 returns to the step 3a. In the step 3b, there is no problem when the voltage of the battery is not low state, but if it is low state, the main control circuit 40 disables the buzzer 32 and the vibration motor 31, etc, which may consume a current of about 70mA or 100mA, in order not to consume excessive current.In other words, the main control circuit 40 provides the auxiliary control circuit 20 with predetermined data, and the auxiliary control circuit 20 disables the buzzer control signal 4, the motor control signal 3, etc, thereby causing the buzzer 32 and the vibration motor 31 not to be operated.
On the other hand, generally, the selection mode switch of a paging receiver includes a normal mode producing a buzzer tone to notify a user when data are received; a memory mode in which a user senses vibration by the vibration of a vibration motor; and an off mode which turns power off.
Figure 4 shows another embodiment which checks the battery voltage state and differentiates subsequent control to take into account the abovedescribed modes.
In Figure 4, the same steps as those shown in Figure 3 are designated by like reference numerals and otherwise they are designated by different reference numerals. The steps having different reference numerals will be mainly described because the steps having the same reference numerals have the same function as before.
If the voltage o; the battery 90 is determined as a low voltage state in the step 3b, it is followed by a step 4a where it is checked whether or not the mode switch circuit 70 assigns a normal mode to the main control circuit 40.
If the normal mode is assigned to main control circuit 40. the main control circuit 40 cuts off the buzzer control signal 4 and the lamp control signal 5 in a step 4c. If the normal mode is not assigned to the main control circuit 40 in the step 4a, the main control circuit 40 advances to the step 4b to disable the vibration motor control signal 3. After performing the steps 4b and 4c, the lamp 33, the buzzer 32 and the vibration motor 31 are disabled so that the lamp 33, the buzzer 32 and the vibration motor 31 can not operate as they are not supplied with driving current from the driving circuit 30. Accordingly, even though data is received when the voltage of the battery 90 is a low state, there is no sudden power consumption due to activation of the alarms.
Therefore, it does not occur that the main control circuit 40 is reset. After performing the steps 4b or 4c, the main control circuit 40 notifies the liquid crystal display circuit 60 that data have been received and also displays a lowvoltage state message in the step 3d as shown in Figure 3, and then returns to the step 3a.
Thus, in the above-described example of a method of the present invention. the main control circuit controls the buzzer, the vibration motor and the lamp having significant current consumption in response to the mode selection switch, even if data are received when the battery which is a main power source is in a low voltage state, thereby preventing their operation.
Thus. the main control circuit may be prevented from being reset by a sudden drop of the battery voltage.
Further, loss of data can be prevented even if there exists previously received data.
While a preferred embodiment of the invention has been particularly shown and described, it will be understood by those skilled in the art that modifications in detail may be made without departing from the spirit and scope of the invention.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (7)
1. A method for protecting message data in a paging receiver in case of a low power supply state, the method comprising the steps of:
checking whether a power supply is in a low power supply state, during a normal state of operation;
de-energizing a buzzer, a vibration motor and a lamp included in said paging receiver during said low power supply state, thereby to reduce current flow in the receiver; and
displaying said low power supply state on display means and then returning to said power supply checking step.
2. A method for protecting message data in a paging receiver having normal and memory modes of operation, in case of low power supply state, the method comprising the steps of:
checking whether a power supply is in a low power supply state, during a normal state of operation;
de-energizing first alarm means or second alarm means included in said paging receiver in response to said respective modes, during said low power supply state, thereby to reduce current flow in the receiver; and
displaying said low power supply state on display means, and then returning to said power supply checking step.
3. A method as claimed in claim 2, wherein said first alarm means comprises a vibration motor.
4. A method as claimed in claim 2 or 3, wherein said second alarm comprises a buzzer and a lamp.
5. A method as claimed in claim 2, 3 or 4. wherein said de-energizing step comprises the steps of:
checking said modes of operation;
generating a buzzer and lamp disable signals when said paging receiver is in said normal mode of operation, thereby to de-energize said buzzer and lamp; and
generating a motor disable signal when said paging receiver is in said memory mode, thereby to de-energize said vibration motor.
6. A method of checking power supply state in a paging receiver and controlling operation of the receiver in response to such checking, the method being substantially as hereinbefore described with reference to Figures 2 and 3 or Figures 2 and 4 of the accompanying drawings.
7. A paging received provided with power supply checking and control means adapted to operate in accordance with a method according to any of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910007977A KR920022700A (en) | 1991-05-16 | 1991-05-16 | How to Protect Message Under Low Voltage in Wireless Call Receiver |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9125617D0 GB9125617D0 (en) | 1992-01-29 |
| GB2255846A true GB2255846A (en) | 1992-11-18 |
| GB2255846B GB2255846B (en) | 1994-10-26 |
Family
ID=19314541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9125617A Expired - Lifetime GB2255846B (en) | 1991-05-16 | 1991-12-02 | Power supply protection |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR920022700A (en) |
| FR (1) | FR2676607B1 (en) |
| GB (1) | GB2255846B (en) |
| HK (1) | HK36297A (en) |
| IT (1) | IT1252335B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021286A1 (en) * | 1995-01-03 | 1996-07-11 | Techniku B.V. | Remote control system |
| GB2315895A (en) * | 1996-07-26 | 1998-02-11 | Nec Corp | Selective call receiver |
| US5990646A (en) * | 1996-09-06 | 1999-11-23 | Hunter Douglas Inc. | Remotely-controlled battery powered-window covering having power saving receiver |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4908523A (en) * | 1988-04-04 | 1990-03-13 | Motorola, Inc. | Electronic circuit with power drain control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755816A (en) * | 1986-10-29 | 1988-07-05 | Motorola Inc. | Battery saving method for a selective call radio paging receiver |
-
1991
- 1991-05-16 KR KR1019910007977A patent/KR920022700A/en not_active IP Right Cessation
- 1991-11-20 FR FR9114307A patent/FR2676607B1/en not_active Expired - Fee Related
- 1991-11-28 IT ITMI913178A patent/IT1252335B/en active IP Right Grant
- 1991-12-02 GB GB9125617A patent/GB2255846B/en not_active Expired - Lifetime
-
1997
- 1997-03-27 HK HK36297A patent/HK36297A/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4908523A (en) * | 1988-04-04 | 1990-03-13 | Motorola, Inc. | Electronic circuit with power drain control |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021286A1 (en) * | 1995-01-03 | 1996-07-11 | Techniku B.V. | Remote control system |
| US6049293A (en) * | 1995-01-03 | 2000-04-11 | Koot; Hermanus Marinus Ignatius | Remote control system |
| GB2315895A (en) * | 1996-07-26 | 1998-02-11 | Nec Corp | Selective call receiver |
| GB2315895B (en) * | 1996-07-26 | 2000-02-23 | Nec Corp | Selective call receiver |
| CN1094018C (en) * | 1996-07-26 | 2002-11-06 | 日本电气株式会社 | Wireless selective call receiver with speech notice function in which power supply voltage is determined in loading state |
| US5990646A (en) * | 1996-09-06 | 1999-11-23 | Hunter Douglas Inc. | Remotely-controlled battery powered-window covering having power saving receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI913178A1 (en) | 1993-05-28 |
| FR2676607B1 (en) | 1995-03-17 |
| IT1252335B (en) | 1995-06-08 |
| GB9125617D0 (en) | 1992-01-29 |
| HK36297A (en) | 1997-04-04 |
| KR920022700A (en) | 1992-12-19 |
| GB2255846B (en) | 1994-10-26 |
| FR2676607A1 (en) | 1992-11-20 |
| ITMI913178A0 (en) | 1991-11-28 |
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