KR100838657B1 - Digital door lock for breaking standby power and method thereof - Google Patents

Abstract

A digital door lock for cutting off quiescent current and a method thereof are provided to extend the life time of a battery and to prevent the digital door lock from being operated wrongly by software bug of the digital door lock, by completely cutting off power after operation. In a digital door lock(100) for cutting off quiescent current, a power supply unit(120) supplies power to each component of the digital door lock for the predetermined time in receiving a driving request of the digital door lock or if a power control signal is applied. A main control unit(130) applies the power control signal for continuously supplying power, in a normal mode of the digital door lock and cuts off the power control signal to the power supply unit in starting a slip mode of the digital door lock.

Description

Digital Door Lock for Breaking Standby Current and Its Method {Digital Door Lock for Breaking Standby Power and Method Thereof}

1 is a block diagram showing the internal configuration for power supply of a general digital door lock.

2 is a circuit diagram showing a detailed configuration of a power supply unit of a general digital door lock.

Figure 3 is a block diagram showing the internal configuration of a digital door lock according to an embodiment of the present invention.

4 is a circuit diagram of a power supply unit for shutting off standby power of a digital door lock according to another embodiment of the present invention.

5 is a flowchart illustrating a standby current blocking method of a digital door lock according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: digital door lock 110: battery

120: power supply unit 130: main control unit

140: motor driving unit 150: piezo driving unit

160: LED driver

The present invention relates to a digital door lock and a method for blocking standby current.

In general, door locks are installed on doors to artificially restrict unauthorized access to unauthorized places in places where families and many people live (apartments, detached houses, officetels, buildings, etc.). Such door locks include not only an opening and closing method by a key and an opening and closing method by a dial, but also a digital door lock method that combines mechanical and electronic technology. Recently, the digital door lock has overcome the disadvantages of the user's inconvenience caused by the loss of the key generated by using the existing mechanical door lock, and the disadvantages such as crimes caused by theft and duplication of the key by a third party.

There are various types of digital door locks such as a password input method through a key input unit, a magnetic card method with a magnetic stripe, an RF (Radio Frequency) card method, and an IC (Integrated Circuit) card method.

1 is a block diagram showing the internal configuration for power supply of a general digital door lock.

As shown in FIG. 1, a general digital door lock may include a battery, a power supply unit, a main controller (microprocessor), a motor driver, a piezo driver, an LED driver, an operation button unit, and the like for power supply.

The battery 11 corresponds to a source for supplying power to the components of the digital door lock 10. Generally, a battery means a disposable battery, and supplies power for driving a digital door lock using a plurality of batteries.

The power supply unit 12 serves to relay power from the battery 11 to each component of the digital door lock 10. The power relay includes operations such as converting the voltage of the battery 11 into a voltage used by each component of the digital door lock. In addition, the digital door lock 10 is not a device for continuously driving a motor or the like, and operates only when a user opens or closes the door. Therefore, the power supply unit 12 checks whether a predetermined command is input from the user, and relays power of the battery 11 only when the command is input.

The main controller 13 of the digital door lock 10 corresponds to a microprocessor (CPU) that performs overall control of the digital door lock 10. When a predetermined number string or character string is input from a user and the password is matched with a previously stored password, a control such as opening or closing a digital door using a motor is performed.

When the motor driving unit 14 receives an opening / closing signal of the door from the main control unit 13, the motor driving unit 14 serves to move a dead bolt of the door lock accordingly. The LED driver 16 corresponds to a component for receiving a numeric string, a string, or the like from a user, or outputting a guide message. The piezo driver 15 corresponds to a component for detecting a user's button touch. Piezo, or piezoelectric effect, refers to the effect of generating a voltage on the surface of the piezoelectric element by applying an external force to a particular crystal of the piezoelectric element. By using the piezoelectric effect as described above, whether a command is input through the user's operation button unit 17 may be detected. The motor driver 14, the piezo driver 15, the LED driver 16, and the operation button unit 17 described above are driven by the power supplied from the battery 11 via the main controller 13.

2 is a circuit diagram showing a detailed configuration of a power supply unit of a general digital door lock.

As shown in FIG. 2, the power supply unit 12 includes an interlocking unit P1 and P2 with a battery, a plurality of resistors, capacitors, and diodes, a voltage regulator, and the like.

P1 and P2 terminals of FIG. 2 mean both terminals of the battery. The voltage VBAT input through the terminals of P1 and P2 is input to the VIN terminal of a voltage regulator such as HT7335.

The voltage converter plays a role of converting the voltage of VBAT into a voltage required by the main controller 13 of the digital door lock 10. Although there are many devices implementing such a voltage converter, a low power voltage regulator (LDO) designated as HT7335 is used in FIG. 2. In FIG. 2, the voltage converter converts VBAT, which is the power of the battery, into VCC, which is the driving voltage of the main controller 13, and the voltage of the converted VCC is transmitted to each component of the main controller 13 and the digital door lock.

In the digital door lock 10 of FIG. 2, there was no function to cut off power transmitted to each component of the digital door lock 10. Therefore, even in the sleep mode in which the digital door lock 10 does not actually operate, the power of the VCC is continuously supplied to the main controller 13. Although there is substantially no power supply to the motor, the LED, etc., power is supplied to the main control unit 13 so that a standby current is generated.

According to the circuit of the power supply unit of the digital door lock described above, even when the door lock is in the sleep mode, a minimum current of 30 uA and a maximum of 150 uA is emitted. The power emitted by the standby current of 30uA to 150uA accounts for 70% of the battery power used in the home. As a result, once the battery is replaced, about 70% of the battery is consumed in the standby mode, and only about 30% of the power is used to drive the actual door lock.

Therefore, the present invention blocks the standby current supplied to each component of the digital door lock in the sleep mode of the digital door lock in order to solve the problems such as power discharge and battery consumption due to the standby current according to the prior art, An object of the present invention is to provide a digital door lock and a method for blocking standby current to wake up when a key is input.

{Patent Claims}

Hereinafter, a digital door lock for blocking standby current according to the present invention and a method thereof will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing an internal configuration of a digital door lock according to an embodiment of the present invention.

As shown in FIG. 3, the digital door lock 100 according to the present invention includes a battery 110, a power supply unit 120, a door lock main control unit 130, a motor driving unit 140, a piezo driving unit 150, and an LED driving unit ( 160), and the like.

The battery 110 is a source for supplying power to the components of the digital door lock like a conventional battery. When the motor driving unit 140 receives an opening / closing signal of the door from the main controller 130, the motor driving unit 140 moves the dead bolt of the door lock to physically open and close the door lock. The LED driver 160 corresponds to a component for receiving a numeric string, a string, or the like from the user, or outputting a guide message. The piezo driver 150 corresponds to a component for detecting a user's button touch.

The power supply unit 120 supplies power to each component of the digital door lock 100 so that no standby current is generated. In order to prevent the standby current from occurring, the power supply unit 120 cuts off the power supply to the main controller 130 in the sleep mode of the digital door lock. Of course, when the user drives the digital door lock through operations such as 3 * 4 key, 3 * 4 key cover lead, the power supply unit 120 should detect the power supply to the main controller 130. Thus, the detailed configuration of the power supply unit for shutting off the standby power will be described in more detail.

4 is a circuit diagram of a power supply unit for blocking standby power of a digital door lock according to another embodiment of the present invention.

As shown in FIG. 4, the power supply unit 100 includes terminals of P1 and P2 for receiving power from the battery 110. Portions for blocking standby power correspond to elements inside the dotted line portion of FIG. 4.

The area 1 inside the dotted line includes a resistor having a value of 100R and components such as an open / close switch 125, a cover reed switch 126, a 3 * 4 key switch 127, and a diode of the door lock. Area 2 corresponds to a component for supplying power to the main switch 130 of the digital door lock according to whether the three switches (125, 126, 127) or the power control signal is applied. Region 2 is preferably composed of two transistors, a resistor and a capacitor. Hereinafter, the operation of the power supply unit according to the circuit diagram will be described in more detail.

When the door lock is not normally operated and is in the sleep mode, the power supply of the door lock is completely shut off. This operation is performed by the Q1 transistor. In this case, the door open / close switch, cover reed switch, and 3 * 4 key switch in the area 1 are all disconnected. In addition, since the transistors of Q17 and Q1 are not conducting, the power supply to the voltage converter by the battery is completely shut off. As a result, since the circuit is open in the sleep mode, there is no standby current of the battery.

When the door lock switch, cover reed switch, and 3 * 4 key switch are closed by the user, the closed circuit is configured in the first area. The closed circuit is configured through the ground via the battery and the switch. According to such a closed circuit configuration in area 1, current flows through the base of the Q17 transistor.

When the transistor of Q17 becomes conductive, current flows again to the base of the transistor of Q1, and the transistor of Q1 also conducts. When the transistor of Q1 is conducting, the voltage of the battery is applied to the VIN terminal of the HT7335 voltage converter. Of course, the VBAT voltage applied to the voltage converter is converted into the voltage of the VCC is transferred to the main controller 130.

In this case, the capacitor of EC3 connected to the transistor of Q17 charges when the Q17 transistor conducts. The conduction time of the Q17 transistor can be extended by the charge of the charged EC3. This is to prepare for the case where the user presses the switches 125, 126 and 127 for an extremely short time.

In the above, when the user presses the switches 125, 126, and 127, the power supply process to the main controller 130 has been described. When the user presses and releases the switch, a problem occurs that the power supply to the main controller 130 is cut off again after a predetermined time elapses. Hereinafter, the method of continuously supplying power until the normal operation of the digital door lock will be described.

Once power is supplied to the door lock main controller, the main controller 130 applies a power control signal to the power supply. The circuit to which the power control signal is applied corresponds to terminal ⓐ in FIG. 4. When a power control signal is applied to the terminal, the Q17 transistor can maintain a continuous conduction state. Similarly, the Q1 transistor is conductive, so the battery's voltage is still supplied.

Meanwhile, the main controller 130 enters the sleep mode after performing all operations requested by the user. In this case, the main controller 130 stops applying the power control signal to the power supply 120.

When the application of the power control signal is stopped, the points of ⓐ, ⓑ, ⓒ, ⓓ are grounded, so the transistors of Q17 and Q1 are not conducting. In this case, since the circuit from the battery to the voltage converter is open, the release of standby current does not occur.

5 is a flowchart illustrating a standby current blocking method of a digital door lock according to another embodiment of the present invention.

The user presses a switch for driving the digital door lock (S501). It has already been described that the switch for driving includes a door open / close button switch, a door lock switch cover lid switch, and a 3 * 4 key switch input.

When the drive switch of the digital door lock is closed, the digital door lock is temporarily closed, the power is supplied from the power supply to the microprocessor (S502). The process of S502 can be implemented using a switch, a transistor, or the like as shown in FIG. 4. In addition, the digital door lock can extend the temporary power supply time to the microprocessor using power storage using a capacitor or the like.

Using the temporarily supplied power, the microprocessor applies a power control signal to the power supply (S503). When the power control signal of step S503 is applied, the power supply may configure a closed circuit for supplying power to the microprocessor (S504). As a result, when the power control signal is applied, it is possible to continuously maintain the power supply of the microprocessor from the power supply (S505).

After the microprocessor performs an operation such as the termination of the driving of the motor, the microprocessor determines whether the entry into the sleep mode is necessary (S506). If it is not necessary to enter the sleep mode, the microprocessor repeats the step S503 of applying the power control signal to the power supply.

On the other hand, after the operation of all the digital door lock according to the user's request is completed, the microprocessor blocks the power control signal to the power supply (S507). In this case, since the power supply unit cannot configure a closed circuit using a power control signal and a closed circuit through various switches, standby power is not generated (S508).

Although the present invention has been described in detail through the representative embodiments, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the embodiments described above. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

According to the present invention as described above by providing a digital door lock for blocking the standby current and the method, it is possible to extend the life of the battery, the state is malfunctioned by a software bug of the digital door lock because the power is completely cut off after operation Can be prevented in advance.

Claims (7)

In the digital door lock for blocking the standby current, A power supply unit for supplying power to each component of the digital door lock for a predetermined time or when a power control signal is applied when driving the digital door lock; And a main control unit for applying a power control signal for continuous supply of power in the normal mode of the digital door lock and blocking the power control signal to the power supply control unit when the digital door lock enters the sleep mode. The method of claim 1, The power supply unit, A driving request detector for detecting whether a driving request of the digital door lock exists; A power control signal input terminal configured to receive a power control signal from the main controller; And A digital door lock including a switching unit configured to receive a power control signal through the power control signal input terminal or to transfer power supplied from a battery to each component of the digital door lock when the driving request detection unit detects a driving request of the digital door lock; . The method of claim 2, The switching unit, A first transistor that is turned on when a power control signal is applied through the power control signal input terminal or when the driving request detection unit detects a driving request of a digital door lock; And a second transistor for transferring power of a battery to each digital component when the first transistor is conductive. The method of claim 3, And a capacitor for extending the conduction period of the first transistor by charging electric charges during the first transistor conduction period. The method of claim 3, The driving request detector, And a closed circuit for conducting the first transistor when at least one of a door lock open / close switch, a door lock cover reed switch, or a 3 * 4 key button is input. In the standby current blocking method of the digital door lock, When the driving request for the digital door lock is input, the power supply unit supplying power to the microprocessor of the digital door lock for a predetermined period of time; The microprocessor applying a power control signal to the power supply, the power supply continuously supplying power to each component of the digital door lock and the microprocessor while the power control signal is input; And Blocking the power control signal to the power supply when the microprocessor enters the sleep mode of the digital door lock. The method of claim 6, The power supply process in response to the driving request of the digital door lock of the power supply unit or the application of a power control signal is performed by a switching process using a transistor.

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