TWI812126B - Method for charging and disconnecting portable electronic device and portable electronic device - Google Patents

Abstract

A method for charging and powering off a portable electronic device, used to control whether a portable electronic device accepts charging; the method includes: (A) a proximity sensor of the portable electronic device senses whether an object is approaching And generate a corresponding sensing value, and transmit the sensing value to a controller of the portable electronic device; and (B) when the controller determines that the sensing value reaches a preset value, control the portable electronic device A charging circuit of the portable electronic device refuses to charge, otherwise the charging circuit of the portable electronic device is controlled to accept charging. The achieved effect is to prevent arc sparks from being generated when the charging circuit is momentarily separated from or momentarily contacted with a charging device electrically connected to it.

Description

Methods for charging and powering off portable electronic devices and portable electronic devices

The present invention relates to a method of charging and de-energizing a portable electronic device, and in particular, to a method of using a proximity sensor to determine whether the portable electronic device accepts charging.

Instant plug-in charging docks often encounter arc spark carbonization problems caused by potential differences when the tablet PC is momentarily disconnected or comes into contact, which can easily lead to damage to the connector of the tablet computer electrically connected to the charging dock. The current solution is to use a short detection single-pin spring connector (pogo pin) as the charging switch, plus two long positive and grounding single-pin spring connectors. When the tablet is placed in the charging cradle, although the charging cradle will first contact the long single-pin spring connector, the charging cradle will not start charging until it contacts the short single-pin spring connector. Avoid sparks caused by instant contact between the charging base and the long single-pin spring connector. However, when the tablet is removed from the charging base too quickly, it takes 800 milliseconds for the residual power in the circuit to be completely released, but the short detection single-pin spring connector and the long single-pin spring connector can quickly detach from the charging base. The time only takes 100 milliseconds, and sparks will still be generated due to incomplete discharge.

Therefore, how to prevent the tablet computer from generating arc sparks when it is momentarily separated from or momentarily contacts the charging stand has become one of the issues to be solved in the relevant technical fields.

Therefore, the object of the present invention is to provide a method for charging and de-energizing a portable electronic device, and a portable electronic device that implements the method, which can at least solve the problem of instantaneous detachment or contact charging of a tablet computer as described in the prior art. The problem of arc sparks when seated.

Therefore, the present invention is a method for charging and powering off a portable electronic device to control whether a portable electronic device accepts charging; the method includes: (A) sensing by a proximity sensor of the portable electronic device Whether an object approaches and generates a corresponding sensing value, and sends the sensing value to a controller of the portable electronic device; and when the controller determines that the sensing value reaches a preset value, it controls the portable electronic device. A charging circuit of the portable electronic device refuses to charge, otherwise the charging circuit of the portable electronic device is controlled to accept charging.

In some implementations, in step (A), the proximity sensor is a capacitive sensor, the object is a human body, and the sensing value is related to the capacitance value.

In some implementations, in step (A), the proximity sensor is disposed in a handheld portion of the portable electronic device, and the handheld portion is made of insulating material.

In some implementations, in step (B), the charging circuit has a circuit switch for electrically connecting to a charging device. When the controller determines that the sensing value reaches the preset value, it controls the circuit switch. It is a non-conducting state, so that the charging circuit is disconnected from the charging device and refuses to be charged by the charging device; otherwise, the circuit switch is controlled to be a conductive state, so that the charging circuit is connected to the charging device and accepts the charging device. Charge it.

In addition, a portable electronic device implementing the above method of the present invention includes a proximity sensor, a controller and a charging circuit.

The proximity sensor senses whether an object is approaching and generates a corresponding sensing value.

The controller is electrically connected to the proximity sensor to receive the sensing value from the proximity sensor, and when it determines that the sensing value reaches a preset value, it outputs a charging prohibition signal.

The charging circuit is electrically connected to the controller and refuses charging after receiving the charging prohibition signal output by the controller.

In some implementations, the proximity sensor is a capacitive sensor, the object is a human body, and the sensing value is related to the capacitance value.

In some implementations, the portable electronic device further includes a handheld portion for disposing the proximity sensor therein, and the handheld portion is made of insulating material.

In some implementations, the charging circuit has a circuit switch for electrically connecting to a charging device. When the controller determines that the sensing value reaches the preset value, the circuit switch is controlled to be in a non-conducting state, so that The charging circuit is disconnected from the charging device and refuses to be charged by the charging device.

The function of the present invention is to use the controller to receive the sensing value transmitted by the proximity sensor to detect whether the object is approaching, and determine whether the sensing value reaches the preset value to control the charging circuit. Whether to accept charging, the charging circuit has been disconnected from the charging device in advance before the portable electronic device is unplugged from the charging device or when it is just inserted into the charging device, thereby preventing the charging circuit from being damaged instantly. Arc sparks are generated when the charging device is disconnected or momentarily contacted.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated with the same numbering.

Referring to FIG. 1 , FIG. 1 schematically illustrates a portable electronic device 1 , which may include, for example, a proximity sensor 11 , a controller 12 electrically connected to the proximity sensor 11 , and a controller 12 electrically connected to the proximity sensor 11 . The controller 12 is electrically connected to the charging circuit 13 controlled by the controller 12. In this embodiment, the portable electronic device 1 can be implemented as a tablet computer, a smart phone, or any electronic device that can be carried around. The charging circuit 13 has a circuit switch 131 for electrically connecting with a charging device 2 . The charging device 2 may be, for example, a charging stand, a charger, a charging stand, a power bank, or any charging device that can be electrically connected to the charging circuit 13 to provide electrical energy. The circuit switch 131 is composed of, for example, a metal oxide semiconductor field effect transistor (MOSFET).

The proximity sensor 11 is, for example but not limited to, a capacitive sensor, which senses whether an object (for example, a human hand) is approaching and generates a corresponding sensing value. In this embodiment, the sensing value is the potential difference, and the potential difference range that the proximity sensor 11 can sense is between 0 and 5 volts. See Figure 2A and Figure 2B. 2A is a schematic diagram of a state when the proximity sensor 11 does not detect a human hand. A metal piece 111 (for example, bare copper) of the proximity sensor 11 and a host of the portable electronic device 1 A capacitance is formed between any ground metal 14 (for example, a screw) on the plate 20. For example, a plurality of positive charges are accumulated on the metal piece 111, and a plurality of negative charges are accumulated on the ground metal 14, so the two Multiple power lines are formed between them, so the proximity sensor 11 can sense the sensing value (voltage value) generated between the metal piece 111 and the ground metal 14, such as 5 volts. When a person's hand approaches the proximity sensor 11, as shown in FIG. 2B, part of the charges on the metal piece 111 and the ground metal 14 will be attracted by the person's hand, causing the voltage generated between the two. The value gradually decreases as the distance between the person's hand and the proximity sensor 11 becomes closer and closer. For example, when the hand is at a critical distance (such as but not limited to 3 centimeters) from the proximity sensor 11, the proximity sensor 11 can sense The sensing value (voltage value) between the metal piece 111 and the ground metal 14 is between 2.5 and 3 volts.

It should be noted that, as shown in FIG. 3 , the proximity sensor 11 of this embodiment is disposed in a handheld portion 10 of the portable electronic device 1 . The handheld portion 10 can be made of plastic, acrylic or other insulating materials. The hand-held part 10 may be a handle or any shape suitable for hand-holding.

However, in other embodiments, the proximity sensor 11 can also be a light sensor that senses brightness, and the material of the handheld portion 10 can be implemented as aluminum-magnesium alloy or other metals, and the access sensor The sensing value (such as the above-mentioned voltage value) generated by 11 will decrease as the object (such as a human hand) gradually approaches.

Referring to FIG. 1 , FIG. 4 and FIG. 5 , it is described in detail how the controller 12 cooperates with the proximity sensor 11 and the charging circuit 13 to perform charging and power-off of a portable electronic device according to an embodiment of the present invention. method. The method includes the following steps S51~S54.

First, referring to Figure 4, assuming that the portable electronic device 1 (for example, a tablet computer) is inserted into the charging device 2 (for example, a charging stand) for charging, then as shown in step S51 of Figure 5, the proximity The sensor 11 will continue to sense whether the object (for example, a human hand) is approaching and generate a corresponding sensing value, and transmit the sensing value to the controller 12 .

Next, in step S52 of FIG. 5 , the controller 12 determines whether the sensing value from the proximity sensor 11 reaches a preset value. In this embodiment, the default value is set to 2.5 volts, which means that the distance between the object (eg, a human hand) and the proximity sensor 11 is shorter than the above-mentioned critical distance (3 cm). If the judgment result is positive, the controller 12 will execute step S53. On the contrary, if the judgment result is negative, the controller 12 will execute step S54.

Therefore, in step S53, when the controller 12 determines that the sensing value reaches the preset value, the controller 12 controls the circuit switch 131 of the charging circuit 13 to be in a non-conducting state, so that the charging circuit 13 and The charging device 2 is turned off to prevent the charging device 2 from charging the portable electronic device 1 through the charging circuit 13 .

On the contrary, in step S25, when the controller 12 determines that the sensing value does not reach the preset value, the controller 12 controls the circuit switch 131 of the charging circuit 13 to be in a conductive state, so that the charging circuit 13 It is connected to the charging device 2 to receive charging of the portable electronic device 1 through the charging circuit 13 .

Similarly, when the portable electronic device 1 is to be inserted (or placed) on the charging device 2 (charging rack) for charging, it is also necessary to wait until the person's hand leaves the portable electronic device 1 and reaches the critical distance. Above, when the controller 12 determines that the sensing value from the proximity sensor 11 does not reach the preset value, the controller 12 will control the charging circuit 13 to be connected to the charging device 2 and accept the The charging device 2 charges the portable electronic device 1 through the charging circuit 13 .

To sum up, in this embodiment, the controller 12 receives the sensing value transmitted by the proximity sensor 11 to detect whether the object is approaching, and determines whether the sensing value reaches the preset value ( means that the distance between the object and the proximity sensor 11 is shorter than the critical distance) to control whether the charging circuit 13 accepts charging, so that the portable electronic device 1 is about to be unplugged from the charging device 2 or just inserted into it. When charging the charging device 2 , the charging circuit 13 has been disconnected from the charging device 2 in advance, thereby preventing the charging circuit 13 from generating arc sparks when the charging circuit 13 is momentarily separated from or momentarily contacted with the charging device 2 , and the invention can indeed be achieved. Efficacy and purpose.

However, the above are only examples of the present invention. They cannot be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.

1: Portable electronic devices 10:Handheld part 11: Proximity sensor 111:Metal sheet 12:Controller 13:Charging circuit 131:Circuit switch 14:Ground metal 2:Charging device 20: Motherboard S51~S54: steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a block diagram illustrating components included in a portable electronic device according to an embodiment of the present invention; FIG. 2A is a schematic diagram of a state when a proximity sensor does not detect an object in this embodiment; FIG. 2B is a schematic diagram of a state when the proximity sensor detects the object in this embodiment; Figure 3 is a schematic diagram of the installation position of the proximity sensor in this embodiment; Figure 4 is a schematic diagram of this embodiment; and FIG. 5 is a flow chart illustrating a method for charging and powering off a portable electronic device in this embodiment.

S51~S54: steps

Claims (8)

A method for charging and de-energizing a portable electronic device, which is implemented by a portable electronic device. The portable electronic device includes a proximity sensor, a charging circuit and an electrical connection between the proximity sensor and the charging circuit. The controller, the charging circuit is adapted to be electrically connected to a charging device, and the charging device can be used to charge the portable electronic device; the method includes: (A) the proximity sensing of the portable electronic device The device generates and transmits a sensing value to the controller when the charging circuit is electrically connected to the charging device, wherein the sensing value indicates the proximity of an object to the proximity sensor; and (B) the The controller determines whether the distance between the object and the proximity sensor is shorter than a critical distance based on whether the sensing value reaches a preset value. If the determination result is yes, the charging circuit that controls the portable electronic device refuses to The charging device charges the portable electronic device, otherwise the charging circuit controlling the portable electronic device accepts charging of the portable electronic device by the charging device. The method of claim 1, wherein in step (A), the proximity sensor is a capacitive sensor, the object is a human body, and the sensing value is related to the capacitance value. The method of claim 1, wherein in step (A), the proximity sensor is disposed in a handheld portion of the portable electronic device, and the handheld portion is made of insulating material. The method of claim 1, wherein in step (B), the charging circuit has a circuit switch for electrically connecting to the charging device, and the controller When it is determined that the sensing value reaches the preset value, the circuit switch is controlled to be in a non-conducting state, so that the charging circuit is disconnected from the charging device and the charging device is refused to charge the portable electronic device; otherwise, the circuit is controlled The switch is in a conductive state, so that the charging circuit is connected to the charging device and accepts charging of the portable electronic device by the charging device. A portable electronic device is suitable for electrical connection with a charging device and includes: a proximity sensor; a charging circuit; and a controller electrically connected to the proximity sensor and the charging circuit; wherein, the The proximity sensor generates and transmits a sensing value to the controller when the charging circuit is electrically connected to the charging device, wherein the sensing value indicates how close an object is to the proximity sensor; the control The device determines whether the distance between the object and the proximity sensor is shorter than a critical distance based on whether the sensing value reaches a preset value. If the determination result is yes, the charging circuit is controlled to deny the charging device to the portable device. The electronic device is charged; otherwise, the charging circuit is controlled to accept the charging device to charge the portable electronic device. The portable electronic device of claim 5, wherein the proximity sensor is a capacitive sensor, the object is a human body, and the sensing value is related to the capacitance value. The portable electronic device as claimed in claim 5 further includes a handheld portion for disposing the proximity sensor therein, and the handheld portion is made of insulating material. The portable electronic device as claimed in claim 5, wherein the charging circuit has a circuit switch for electrically connecting to the charging device, and the controller determines When the sensing value reaches the preset value, the circuit switch is controlled to be in a non-conducting state, so that the charging circuit is disconnected from the charging device and the charging device is refused to charge the portable electronic device.

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