JP2007129857A - Discriminating device, charging device, charging system, electronic equipment, discriminating method, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a discriminating device capable of properly setting a charge timing. <P>SOLUTION: The discriminating device is equipped with a first power supply voltage detection circuit 12 for detecting the output voltage of a charging device 20, a second power supply voltage detection circuit 14 for detecting the output voltage of a built-in battery 36, a discriminating means for discriminating the type of the built-in battery 36 from the difference in the detected output voltages, and a control means for controlling the connection status between the charging device 20 and the built-in battery 36 according to the type of the discriminated built-in battery, in which the discriminating means performs discrimination at a specified interval. Thereby, the discriminating device capable of properly setting the timing to start and stop charging can be obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a discriminating device, a charging device, a charging system, an electronic device, a discriminating method, a program, and a recording medium that can appropriately set the timing for performing charging.

  Conventionally, in portable electronic devices that are easy to carry, rechargeable batteries and dry batteries are widely used as power sources. In the following description, a small mini-disc playback device (hereinafter referred to as an MD playback device) using a rechargeable battery will be described as an example of the electronic device.

  The MD playback device is a digital audio device that plays back information signals such as voice / music data digitally recorded on a mini disk (hereinafter referred to as MD) as a storage medium. Here, time axis compression is applied to the information signal digitally recorded on the MD. Therefore, the MD reproduction apparatus reproduces original voice / music data and the like by performing digital / analog conversion after extending the time axis of the information signal read from the MD.

  In a portable MD playback device that is easy to carry, a rechargeable battery or a dry battery is used as the power source of the MD playback device. In the case of such a portable MD playback device, the shape of the rechargeable battery as the secondary battery and the shape of the dry battery as the primary battery may be the same. In that case, the MD playback device may be used by replacing and mounting the rechargeable battery and the dry battery at the same location.

  For example, when an AA Ni-MH rechargeable battery, which is a secondary battery, is used in the apparatus, the AA alkaline battery, which is a primary battery, has the same shape. It is possible to use. If a dry cell is placed inside the device, it is accidentally placed on a charging stand that is a device for charging the device, even though the dry cell that is the primary battery is inside the device. There was a case.

  In order to prevent the above-described erroneous charging, a method is known in which the shape of the rechargeable battery is different from that of the dry battery and the shape is detected by a switch in order to determine whether the battery is a dry battery or a rechargeable battery. In addition, there are two types of charge currents to the rechargeable battery. First, charging is performed at a low charge current value, and the terminal voltage of the rechargeable battery being charged is confirmed, which is higher than the preset terminal voltage value. In the case of a voltage value, a method of stopping charging is known (for example, Patent Document 1).

Further, when charging is started at the second charging current without exceeding the first terminal voltage value set in advance by the first charging current, the terminal is higher than the preset second terminal voltage value. A method for stopping charging when a voltage is detected is known.
Japanese Patent Laid-Open No. 10-332926 (published December 4, 1998)

  However, in the charging device described in Patent Document 1, once it is determined that a primary battery is contained inside the device, the device is picked up, the battery is taken out from the device, and another rechargeable battery is inserted. There arises a problem that it is necessary to start the charging operation again. In addition, when a secondary battery that has become inactive due to discharge is inserted, if it is erroneously determined that a primary battery is inserted, charging is not started even though the secondary battery is inserted. Cause problems.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to realize a determination device, a charging device, and a charging system that can appropriately set a timing for charging.

  In order to solve the above problem, the discrimination device of the present invention is detected by first voltage detection means for detecting the output voltage of the charging device, and second voltage detection means for detecting the output voltage of the built-in battery. Determining means for determining the type of the built-in battery from the difference in the output voltage, and control means for controlling the connection state of the charging device and the built-in battery according to the determined type of the built-in battery, The discriminating means executes the discrimination at a predetermined interval.

  According to said structure, the timing which starts and stops charge by judging the kind of built-in battery by detecting the difference of the said charging voltage and the output voltage of the said built-in battery, and performing discrimination | determination by a predetermined space | interval Set appropriately.

  Thereby, for example, even when there is a change in the type or amount of charge of the internal battery due to replacement of the internal battery, it is possible to control the start / stop of charging at an appropriate timing. In addition, for example, when there is a danger in performing an erroneous charging operation based on an erroneous determination of the type of the built-in battery, the control can be performed with reference to the determination result of a plurality of times, so that more accurate determination is performed. be able to.

  In the discrimination device of the present invention, the interval for executing the discrimination is changed according to the discrimination result.

  In the determination device of the present invention, when the determination unit determines that the built-in battery is a primary battery, the determination unit sets a long interval for the determination, and determines that the built-in battery is a secondary battery. The interval for performing the determination may be set short.

  According to said structure, it can suppress that power consumption increases by repeating the charging operation by discrimination | determination and a discrimination | determination result in multiple times by lengthening the space | interval which performs discrimination | determination. Specifically, for example, even when the primary battery is stored in the charging device, it is possible to reduce the burden on the primary battery due to frequent determination and charging operation.

  In addition, even if the built-in battery is replaced with a secondary battery after it has been determined that it is a primary battery, the determination circuit makes a determination at a predetermined interval. The operation can be started automatically.

  In the determination device of the present invention, when it is determined that the built-in battery is a primary battery, the connection state is controlled based on a result of the determination a plurality of times.

  According to said structure, since it can control with reference to the determination result in multiple times, more exact determination can be performed. Therefore, it is possible to reduce the possibility that a secondary battery that has been discharged and deactivated will be erroneously determined as a primary battery, and to perform more accurate determination. As a result, it is possible to reduce the risk associated with erroneous charging operations based on misjudgment.

  In addition, if the charging system is configured using the above-described determination device and a charging device in which the charging of the built-in battery is controlled by the control unit of the determination device, the same effects as described above can be achieved. it can.

  Moreover, if it is an electronic device provided with the built-in battery charged using said charging system, and a power supply is supplied with this built-in battery, the effect similar to the above can be show | played.

  In order to solve the above problem, a determination method of the present invention is a determination method in an electronic device system including an electronic device that operates by supplying power from a built-in battery, and a charging device that supplies a charging power to the built-in battery. The step of detecting the output voltage of the charging device, the step of detecting the output voltage of the built-in battery, the step of determining the type of the built-in battery from the difference of the detected output voltage, and the determined And controlling the connection state of the charging device and the built-in battery according to the type of the built-in battery. In the determining step, the determination is performed at a predetermined interval.

  According to the above method, the timing of starting and stopping charging by determining the type of the built-in battery by detecting the difference between the charging voltage and the output voltage of the built-in battery, and performing the determination at a predetermined interval. Set appropriately.

  Thereby, for example, even when there is a change in the type or amount of charge of the internal battery due to replacement of the internal battery, it is possible to control the start / stop of charging at an appropriate timing. In addition, for example, when there is a danger in performing an erroneous charging operation based on an erroneous determination of the type of the built-in battery, the control can be performed with reference to the determination result of a plurality of times, so that more accurate determination is performed. be able to.

  The discriminating device may be realized by a computer. In this case, a control program for the discriminating device that causes the computer to realize the discriminating device by operating the computer as each of the means, and recorded the program Computer-readable recording media are also within the scope of the present invention.

  As described above, the determination device of the present invention performs determination at predetermined intervals and controls the connection state of the charging device and the built-in battery according to the determination result, so that the timing for starting and stopping charging is set appropriately. There is an effect that can be done.

  For example, when a primary battery is installed as a built-in battery, the risk of starting charging the primary battery using the determination results of multiple times is suppressed, and the battery is replaced with a secondary battery. Can be determined at predetermined intervals, and charging timing can be controlled such that charging is started based on the result.

  An embodiment of the present invention will be described with reference to FIGS. 1 and 2 as follows. FIG. 1 is a block diagram illustrating a schematic configuration of an electronic device system 1 including a power supply unit 60 including the determination device 10 of the present invention, an electronic device 50 including the power supply unit 60, and the charging device 20. The power supply unit 60 and the charging device 20 are combined to form the charging system 30, and the power supply unit 60 and the determination device 10 may be provided in the electronic device 50 or in the charging device 20.

  First, the charging system 30 will be described. The charging system 30 includes a power supply unit 60 including a determination device 10, a charge control circuit 32, a battery connection terminal 34, a built-in battery 36, and a power supply circuit 38, and the charging device 20. The determination device 10 determines the built-in battery 36 based on the output voltage of the charging device 20 and the terminal voltage of the battery connection terminal 34, and gives an instruction to the charge control circuit 32. The charging device 20 supplies power to the charging control circuit 32 and the power supply circuit 38. Details of the determination device 10 and the charging device 20 will be described later.

  The charging control circuit 32 is a circuit for switching supply of charging power from the charging device 20 to the built-in battery 36. The charge control circuit 32 includes, for example, an electronic switch using a power MOS (Metal Oxide Semiconductor) FET, and switches power supply. Power is supplied to the internal battery 36 through the battery connection terminal 34.

  The battery connection terminal 34 is a terminal for electrically connecting the charge control circuit 32 and the built-in battery 36, and supplies the power supply voltage from the charge control circuit 32 to the built-in battery 32. The internal battery 36 is supplied with power from the charge control circuit 32 via the battery connection terminal 34. The built-in battery 36 supplies the terminal voltage of the built-in battery 36 to the power supply circuit 38 via the battery connection terminal 34 when no power is supplied from the charge control circuit 32.

  The power supply circuit 38 receives power supply from the charging device 20 and the battery connection terminal 34 and supplies power to the electronic device 50 based on an instruction from the determination device 10. The power supply circuit 38 switches power supply from the charging device 20 or the battery connection terminal 34 based on an instruction from the determination device 10. The power supply circuit 38 is constituted by a DC-DC conversion circuit, and supplies necessary voltages to each part of the electronic device 50.

  Here, the power supply circuit 38 is a DC-DC conversion circuit, but is not limited thereto. Any configuration may be used as long as power can be supplied to the electronic device 50. The power supply circuit 38 may be a DC-DC conversion circuit for supplying a plurality of power supplies, for example, 2.5 V / 1.5 V to the circuit of the electronic device 50.

  Next, details of the configuration of the determination device 10 will be described. The determination device 10 includes a first power supply voltage detection circuit 12, a second power supply voltage detection circuit 14, and a system controller 16. The first power supply voltage detection circuit 12 is a voltmeter that detects an output voltage from the charging device 20 to the power supply circuit 38. The first power supply voltage detection circuit outputs the detected voltage to the system controller 16. The second power supply voltage detection circuit 14 is a voltmeter that detects an output voltage from the built-in battery 36 to the power supply circuit 38 via the battery connection terminal 34. The second power supply voltage detection circuit outputs the detected voltage to the system controller 16.

  The system controller 16 constantly checks the output voltage value from the charging station 24 detected by the first power supply voltage detection circuit 12 and the output voltage value from the built-in battery 36 detected by the second power supply voltage detection circuit 14. Based on the output voltage value, it is determined whether the electronic device 50 is connected to the charging device 20 or whether the built-in battery 36 is mounted inside the electronic device 50. Based on the above determination, a determination is made as to which power source of the charging device 20 or the internal battery 36 should be used. The determination result is output to the charge control circuit 32 and the power supply circuit 38. The power supply circuit 38 switches the supply of power from the built-in battery 36 or the charging device 20 by a switching device provided inside.

  When the reproduction is stopped and the electronic device 50 is powered off, the system controller 16 uses the voltage value of the charging station 24 detected by the first power supply voltage detection circuit 38 and the second power supply voltage detection circuit 14. The detected voltage value of the built-in battery 36 is confirmed, and it is determined whether or not the charging operation should be started. Then, the charging control circuit 32 is operated to charge the built-in battery 36 from the AC adapter 22 via the charging stand 24.

  At this time, the system controller 16 confirms whether or not the battery is fully charged based on the voltage value of the built-in battery 36 detected by the second power supply voltage detection circuit 14. Further, the difference between the voltage value of the charging station 24 detected by the first power supply voltage detection circuit 12 and the voltage value of the built-in battery 36 detected by the second power supply voltage detection circuit 14 is detected. The system controller 16 performs processing based on the determination result of whether the battery is a secondary battery that can be charged or whether the built-in battery is not inserted at all.

  Next, the charging device 20 will be described in detail. The charging device 20 includes an AC adapter 22 and a charging stand 24, and supplies power to the charging control circuit 32 and the power supply circuit 38. The charging device 20 may include a determination device 10, a charging control circuit 32, a battery connection terminal 34, a built-in battery 36, and a power supply circuit 38 inside.

  The AC adapter 22 converts the AC voltage into a DC voltage and outputs it to the charging stand 24. Specifically, the AC adapter 22 receives 100 VAC of household power, steps down with a built-in transformer, rectifies with a diode, converts the voltage into a DC voltage, and outputs it. Even if a transformer type AC adapter is used, the output voltage of the AC adapter 22 is set to be 3.8V DC when a current of up to 500 is applied to the output of DC 6.0V with no load. Good. When a switching type AC adapter is used, the output voltage may be set to be constant at DC 3.5V.

  The charging stand 24 receives power supply from the AC adapter, performs voltage conversion using an internal voltage control circuit (not shown), and supplies power to the charge control circuit 32 and the electron microscope circuit 38. The charging stand 24 includes a DC jack and has a structure in which the plug of the AC adapter 22 can be inserted. By inserting the plug of the AC adapter 22, power is supplied to the charging stand 24.

  Specifically, for example, the charging stand 24 may supply a constant current of DC 500 mA to the charging control circuit 32 and supply a constant voltage of DC 1.5 V to the power supply circuit 38. When the built-in battery 36 is a secondary battery, the charging stand 24 is a circuit in which, for example, the charging current is constant at 500 mA during charging and constant current charging is possible, and a constant voltage is supplied during normal playback operation. You may do it.

  Next, details of the electronic device 50 will be described. Here, the electronic device 50 will be described using a small MD device using a rechargeable battery as an example. However, the electronic device 50 is not limited to an MD device, and is an electronic device such as a music playback device, a mobile phone, a PDA (Personal Digital Assistant), a portable PC (Personal Computer), a portable game machine, or a shaver. May be. The same effect can be expected with any small portable electronic device that uses a rechargeable battery.

  The electronic device 50 includes a power source 60, a mini disk 51, a spindle motor 52, a pickup 53, a feed motor 54, a driver circuit 55, an RF amplifier 56, a processable color 57, a shock proof memory 58, an amplifier circuit 59, and headphones. Contains.

  The mini disc 51 (hereinafter referred to as MD 51) has concentric or spiral tracks, and information signals such as voice / music data are digitally recorded along the tracks. In addition to main information such as voice / music data, MD 51 also records U-TOC information including a disc title name, each track title name, and address information of a memory storing voice / music data. Has been.

  When reproducing the information signal recorded on the MD 51, the MD device controls the MD 51 in a zone CAV (Constant Angular Velocity) in which the MD 51 is partially rotated at a constant angular velocity, and also feeds the pickup 53 by the feed motor 54. Step drive in the radial direction. Then, a laser beam is irradiated from the pickup 53 positioned on a predetermined track toward the track, and the information signal is read by detecting the intensity change of the reflected light again by the pickup 53.

  Here, the pickup 53 includes a laser beam, a collimator lens, a beam splitter, an objective lens actuator, a photoelectric signal conversion circuit (all not shown), and the like. The drive control of the spindle motor 52, the pickup 53, and the feed motor 54 is all performed by the driver circuit 55.

  The pickup 53 converts the information signal read from the MD 51 into an electric signal by an opto-electric signal conversion circuit, and sends it to the RF amplifier 56. The RF amplifier 56 amplifies the information signal and outputs it to a processing circuit 57 having a decoder / signal processing circuit, and generates servo control signals such as a focus error signal, a total signal, and a tracking error signal based on the information signal. Then, the data is sent to the servo circuit of the processing circuit 57.

  The processing circuit 57 is a circuit that performs a plurality of processes including a decoder, a signal processing circuit, a servo circuit, an audio expansion circuit, a shock proof memory controller, and a D / A converter. The servo circuit of the processing circuit 57 controls the driver circuit 55 in accordance with a servo control signal, an address signal from the signal processing circuit, and a control signal from the system controller microcomputer 11 (hereinafter referred to as the system controller 11). Thus, servo control of various operations such as focusing, tracking, and disk spinning is performed.

  On the other hand, the signal processing circuit in the processing circuit 57 performs processing such as address signal extraction, main signal demodulation, and error correction on the information signal amplified by the RF amplifier 56. Then, the processed information signal is sent to a shock proof memory controller (hereinafter referred to as a memory controller) in the processing circuit 57. The memory controller is means for controlling the writing and reading of information to and from the shock proof memory 58, and the information signal from the signal processing circuit is once written into the shock proof memory 58.

  The writing rate at this time is 1.5 × 1.4 Mbit / sec when the rotation of the MD 51 is 1.5 times speed. The memory controller in the processing circuit 57 reads out the information signal from the shock proof memory 56 at a reading rate of 0.3 Mbit / sec and sends it to the audio decompression circuit in the processing circuit 57.

  Thus, the speed between writing the information signal read from the MD 51 into the shock proof memory 58 and the speed at which the information signal is sent from the shock proof memory 58 to the audio decompression circuit is 1.5 × 1.4. There is a difference of −0.3 = 1.8 Mbit / sec. Due to the difference in processing speed, the information signal before the time axis compression is released is stored in the shock proof memory 58.

  Further, the shock-proof memory 58 stores U-TOC information (disc title name, track title name, etc.) read from the MD 51. For example, the start position of each song recorded on the disc 51, End position or time information can be obtained. Subsequently, the voice decompression circuit in the processing circuit 57 decompresses the input information signal by decompressing it in accordance with a predetermined format and sends it to the D / A converter.

The D / A converter generates the voice / music data by analog-converting the compressed information signal. Then, the volume of the voice / music data is adjusted via the amplifier circuit 59, and the voice / music data is reproduced and output to the user through an output device such as a headphone or a speaker.

  In FIG. 1, the determination device 10, the charging control circuit 32, the battery connection detection 34, the built-in battery 36, and the power supply circuit 38 that configure the charging system 30 are illustrated outside the electronic device 50. The device 50 may be provided, or the charging circuit 20 may be provided. The system controller 16 may be provided in the electronic device 50. The charging control circuit 32 may be provided in the charging stand 24 or may be provided in the electronic circuit 50. The internal battery 36 and the power supply circuit 38 may be provided in the electronic device 50. Considering the physical configuration and shape of each device, the place where each member is arranged may be changed as appropriate within the scope of the claims.

  Next, the operation of the above-described determination device 10 and the operation of the charging system 30 will be specifically described with reference to a flowchart. FIG. 2 is a flowchart showing the flow of each process performed in the electronic device system 1.

  First, in S <b> 1, it is confirmed whether or not the power is turned off during reproduction in a state where the electronic device 50 is installed on the charging stand 24. In this confirmation, firstly, it is confirmed whether or not the apparatus is installed on the charging stand 24 from the voltage detected by the system controller 16 by the first power supply voltage detection circuit 12 during the reproduction, and secondly illustrated. It is detected whether the apparatus has been stopped / powered off by a non-operating key.

  If it is confirmed that the power is turned off in the state set in the charging stand 24 in S1 (YES in S1), the process proceeds to step S3. When the power is turned off at the time of reproduction with the built-in battery 36, or when reproduction is currently being performed (NO in S1), the process proceeds to S2.

  In S <b> 2, it is determined again whether or not the electronic device 50 is attached to the charging stand 24 in a power-off state based on whether or not the voltage detected by the first power supply voltage detection circuit 12 by the system controller 16 is zero volts. To do. If it is determined in S2 that the electronic device 50 is attached to the charging stand 24 in a power-off state (YES in S2), the process proceeds to S3. If it is determined that the situation is not described above (NO in S2), the process returns to step S1.

  In S3, the charge controller circuit 32 is operated by the system controller 16, and the charging stand 24 and the built-in battery 36 are connected via, for example, an electronic switch of a power MOS FET. In S <b> 4, the system controller 16 reads the output voltage Vst of the charging stand 24 and the terminal voltage Vbat of the built-in battery 36 using the first power supply voltage detection circuit 12 and the second power supply voltage detection circuit 14.

  In S5, a voltage difference between the read output voltage Vst of the charging stand 24 and the terminal voltage Vbat of the built-in battery 36 is obtained, and it is confirmed whether or not the voltage difference is equal to or larger than a preset value. If it is determined in S5 that the voltage difference between the output voltage Vst of the charging station 24 and the terminal voltage Vbat of the built-in battery 36 is equal to or greater than a preset value (YES in S5), the process proceeds to S13. In S13, it is determined that there is a rechargeable battery as a built-in battery, and charging from the charging stand to the rechargeable battery is continued. Further, in S14, a routine for determining whether or not the rechargeable battery is fully charged is entered.

  On the other hand, if it is determined in S5 that the voltage difference between the output voltage Vst of the charging station 24 and the terminal voltage Vbat of the built-in battery 36 is lower than a preset voltage (NO in S5), the process proceeds to S6. In S6, it is confirmed whether or not the output voltage Vst of the charging stand 24 and the terminal voltage Vbat of the built-in battery 36 are substantially equal, that is, whether or not the voltage of Vst−Vbat is substantially zero volts.

  If the output voltage Vst of the charging stand 24 and the terminal voltage Vbat of the built-in battery 36 are substantially equal, that is, if the voltage of Vst−Vbat is substantially zero volts (YES in S6), the process proceeds to S12.

  When the voltage of Vst−Vbat is not substantially zero volts and there is a slight voltage difference (NO in S6), a dry battery may be included as the built-in battery 36, so that it is stored in a memory (not shown) in S7. The voltage value of Vbat confirmed last time is compared with the voltage value of Vbat read this time, and in S8, it is confirmed whether or not the value of Vbat read this time is higher.

  If the voltage of Vst−Vbat is not substantially zero volts (NO in S6), the process proceeds to S7. When the voltage of Vst−Vbat is substantially zero volts and the process proceeds to S12, the charging current is not flowing from the charging stand 24 to the built-in battery 36 side. Therefore, it is determined that the built-in battery 36 is not inserted, the electronic switch of the power MOS FET is turned off, the operation of the charge control circuit 32 is stopped, and the process proceeds to S11.

  In S8, when the value of Vbat read this time has not increased (NO in S8), the process proceeds to S12. In S12, it is determined that there is no built-in battery 36, and the charging control circuit 32 is turned off to stop the charging operation. In S8, if the value of Vbat read this time is higher (YES in S8), the process proceeds to S9. In S <b> 9, the determination device 10 determines that the built-in battery 36 contains a dry battery, and turns off the charging control circuit 32 to stop the charging operation.

  Then, in order to reduce the charging voltage from being applied to the primary battery as much as possible, the setting voltage is multiplied by a set value in order to lengthen the time setting value that is periodically checked after a predetermined period. For example, normally, detection performed every 30 seconds is set to be four times that of every 2 minutes in order to prevent the charging voltage from being applied to the dry battery as much as possible.

  Thereafter, the process proceeds to S11 where the system controller 16 operates the charge control circuit 32 to connect the charging stand 24 and the built-in battery 36 again to check whether the built-in battery 36 can be charged. Check if the time has passed. That is, when it is determined in S12 that the internal battery 36 is not present, the internal battery is set at a time interval of every 30 seconds. It is periodically determined whether the battery is inserted from a state where there is no battery, or whether the dry battery is removed and a rechargeable battery is inserted instead.

  In S11, when it is determined that the time for connecting the charging stand 24 and the built-in battery 36 is equal to or longer than the set time (YES in S11), the process returns to S3 and the same repeated operation is performed. If it is determined that the set time has not been reached (NO in S11), the process returns to S11 again, and steps S1 to S11 are circulated until the set time is reached.

  As described above, the determination device 10 of the present invention includes the first power supply voltage detection circuit 10 that detects the output voltage of the charging device 20, and the second power supply voltage detection circuit 14 that detects the output voltage of the built-in battery 36. The system controller 16 includes a system controller 16 that determines the type of the internal battery 36 from the voltages detected by the first power supply voltage detection circuit 12 and the second power supply voltage detection circuit 14, and the system controller 16 performs the determination at a predetermined interval. The connection state between the charging device 20 and the built-in battery 36 is controlled according to the determination result.

  According to said structure, there exists an effect that the kind of built-in battery 36 can be judged by detecting the voltage difference of a charging voltage and an output voltage, and the timing which performs charge can be set appropriately.

  By performing the determination at a predetermined interval, appropriate charge control can be performed even when the type of the internal battery or the amount of charge changes due to the replacement of the internal battery 36. In addition, when there is a danger in performing an erroneous charging operation based on a wrong determination of the type of the built-in battery 36, the control can be performed with reference to the determination result of a plurality of times, so that more accurate determination is performed. Can do.

  Further, the discrimination device 10 of the present invention is characterized in that a predetermined interval for executing discrimination is changed according to the discrimination result.

  Further, in the determination device 10 of the present invention, when the determination device 10 determines that the built-in battery 36 is a primary battery, the determination device 10 sets a predetermined interval for determination to be long and determines that the built-in battery 36 is a secondary battery. In this case, the predetermined interval for performing the determination may be set short.

  According to said structure, there exists an effect that it can suppress that power consumption increases by repeating determination and the charging operation by a determination result in multiple times. Specifically, even when the primary battery is stored in the charging system 30, it is possible to reduce the burden on the primary battery due to frequent determination and charging operation. Further, even when the built-in battery 36 is replaced with a secondary battery in the middle, since the determination is performed at a predetermined interval, the charging operation is automatically started by detecting that the secondary battery is installed. Can do.

  Further, in the determination device 10 of the present invention, when it is determined that the internal battery 36 is a primary battery, the charge control circuit 32 controls the connection state based on the result of the determination performed a plurality of times at a predetermined interval. It is characterized by.

  According to said structure, since it can control with reference to the determination result in multiple times, more exact determination can be performed. Therefore, it is possible to reduce the possibility that a secondary battery that has been discharged and deactivated will be erroneously determined as a primary battery, and to perform more accurate determination. As a result, it is possible to reduce malfunctions caused by not performing a charging operation based on erroneous determination.

  If it is the charging system 30 comprised using said discrimination | determination apparatus 10 and the charging device 20 which charges based on the discrimination | determination result of the discrimination | determination apparatus 10, the effect similar to the above can be show | played. If it is the electronic device 50 which charges using said charging system 30, the effect similar to the above can be show | played.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

  Finally, the block of the system controller 16 of the determination apparatus 10 may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the determination device 10 includes a CPU (Central Processing Unit) that executes instructions of a control program that realizes each function, a ROM (Read Only Memory) that stores the program, a RAM (Random Access Memory) that expands the program, A storage device (recording medium) such as a memory for storing the program and various data is provided. An object of the present invention is to provide a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the determination device 10 which is software that realizes the above-described functions is recorded so as to be readable by a computer. This can also be achieved by supplying the determination device 10 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the determination device 10 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  As described above, the discrimination device of the present invention discriminates the type of the built-in battery at a predetermined interval and controls the connection state of the charging device and the built-in battery according to the discrimination result. Since a discrimination device that can be set appropriately can be realized, an MD playback device using a rechargeable battery, a music playback device, a mobile phone, a PDA (Personal Digital Assistant), a portable PC (Personal Computer), a portable game machine, a shaver It can utilize suitably for electronic devices, such as.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a block diagram illustrating a configuration of a main part of an electronic device system. It is a flowchart which shows the flow of the charging process in the said electric equipment system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic device system 10 Discriminating device 12 1st power supply voltage detection circuit (1st voltage detection means)
14 Second power supply voltage detection circuit (second voltage detection means)
16 System controller (discrimination means)
20 Charging Device 22 AC Adapter 24 Charging Stand 30 Charging System 32 Charge Control Circuit (Control Means)
36 Built-in battery 38 Power supply circuit (control means)
DESCRIPTION OF SYMBOLS 50 Electronic device 51 Mini disk 52 Spindle motor 53 Pickup 54 Feed motor 55 Driver circuit 56 RF amplifier 57 Processing circuit 58 Shock proof memory 59 Amplifier circuit 60 Power supply part

Claims (9)

A discrimination device used in an electronic device system including an electronic device that operates by supplying power from a built-in battery, and a charging device that supplies charging power to the built-in battery,
First voltage detecting means for detecting an output voltage of the charging device;
Second voltage detecting means for detecting an output voltage of the internal battery;
Discriminating means for discriminating the type of the built-in battery from the detected difference in the output voltage;
Control means for controlling the connection state between the charging device and the built-in battery according to the determined type of the built-in battery,
The discrimination device is characterized in that the discrimination means executes the discrimination at a predetermined interval.   The determination apparatus according to claim 1, wherein the determination unit changes an interval for performing the determination according to a determination result.   When determining that the built-in battery is a primary battery, the determination unit sets the determination interval to be long, and when determining that the built-in battery is a secondary battery, sets the determination interval to be short. The discriminating apparatus according to claim 2, wherein:   2. The determination device according to claim 1, wherein when the determination unit determines that the built-in battery is a primary battery, the determination unit controls the connection state based on a result of the determination a plurality of times.   5. A charging system comprising: the discrimination device according to claim 1; and a charging device in which charging of the built-in battery is controlled by the control unit of the discrimination device.   An electronic apparatus comprising an internal battery that is charged by the charging system according to claim 5, wherein power is supplied by the internal battery. A determination method in an electronic device system including an electronic device that operates by supplying power from a built-in battery, and a charging device that supplies charging power to the built-in battery,
Detecting the output voltage of the charging device;
Detecting the output voltage of the internal battery;
Determining the type of the built-in battery from the detected difference in the output voltage;
Controlling the connection state of the charging device and the built-in battery according to the determined type of the built-in battery,
In the determination step, the determination is performed at a predetermined interval.   A program for operating the determination device according to claim 1, wherein the program causes a computer to function as each of the above means.   A computer-readable recording medium on which the program according to claim 8 is recorded.

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