CN111371471B

CN111371471B - Portable terminal and charging seat thereof

Info

Publication number: CN111371471B
Application number: CN202010180244.8A
Authority: CN
Inventors: 张维翔; 杨荏絜
Original assignee: Universal Global Technology Kunshan Co Ltd
Current assignee: Universal Global Technology Kunshan Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2022-02-08
Anticipated expiration: 2040-03-16
Also published as: CN111371471A

Abstract

A portable terminal and a charging cradle thereof, the portable terminal includes a terminal control circuit, the portable terminal is charged by the charging cradle when the portable terminal is in a charging mode, the terminal control circuit includes a terminal charging terminal and a semiconductor device. When the portable terminal is in the charging mode, the terminal charging terminal is directly coupled to the cradle charging terminal of the charging cradle. The semiconductor device includes a first terminal and a second terminal, and the second terminal is coupled to the terminal charging terminal. When the portable terminal is in the charging mode, the charging power is input from the cradle charging terminal to the terminal charging terminal, the original signal is input from the first terminal to the semiconductor device and output from the second terminal to the terminal charging terminal, and then input to the cradle charging terminal for controlling the controlled device on the charging cradle. Therefore, the power line carrier circuit can be realized, and the locking or unlocking between the portable terminal and the charging seat can be further realized.

Description

Portable terminal and charging seat thereof

Technical Field

The present invention relates to a portable terminal and a charging stand thereof, and more particularly, to a portable terminal including a power line carrier circuit and a charging stand thereof.

Background

When an enterprise configures a portable device for performing its work, it is often necessary to strictly control the number, user, usage time, usage location, etc. of the portable device, and when the portable device is not used, it is better to charge the portable device at the controlled location and state.

In light of the foregoing, there is a need in the market to develop a portable device that is suitable for enterprise applications and management and can reduce the design complexity.

Disclosure of Invention

The invention provides a portable terminal and a charging seat thereof, wherein a terminal charging end of the portable terminal is coupled with a semiconductor element, and a seat frame charging end of the charging seat is coupled with a sensing resistor, which is beneficial to reducing the complexity of a power line carrier circuit under the condition that the number of external pins of the portable terminal and the charging seat is not increased, and further realizing the locking or unlocking between the portable terminal and the charging seat.

According to one embodiment of the present invention, a portable terminal includes a terminal control circuit including a terminal charging terminal and a semiconductor device. When the portable terminal is in the charging mode, the terminal charging terminal is directly coupled to the seat frame charging terminal of the charging seat, and the portable terminal is charged by the charging seat. The semiconductor device includes a first terminal and a second terminal, and the second terminal is coupled to the terminal charging terminal. When the portable terminal is in the charging mode, the charging power is input from the cradle charging terminal to the terminal charging terminal, the original signal is input from the first terminal to the semiconductor device and output from the second terminal to the terminal charging terminal, and then input to the cradle charging terminal for controlling the controlled device on the charging cradle. Therefore, the portable terminal and the charging base can realize a power line carrier circuit.

The portable terminal according to the foregoing embodiment, wherein the controlled element can be an actuating element, and the controlled element is used to lock and unlock the portable terminal to the charging stand.

The portable terminal according to the foregoing embodiment, wherein the original signal is determined according to the determination information in the portable terminal, and the determination information includes the identity information.

The portable terminal according to the foregoing embodiment may further include an input interface, wherein the determination information is input through the input interface, and the input interface is one of a wireless communication receiver, a radio frequency identification reader, an infrared receiver, a barcode sensor, a physiological signal receiver, a camera module, a touch screen, and a key.

According to the portable terminal of the foregoing embodiment, when the portable terminal is in the charging mode, the terminal charging terminal may be directly coupled to the cradle charging terminal in a wired manner, and the charging power source may be a dc charging power source.

In the portable terminal according to the foregoing embodiment, the semiconductor device may be a field effect transistor, and the semiconductor device further includes a third terminal, wherein the first terminal is a gate, the second terminal is a drain, and the third terminal is a source.

Through the portable terminal of the embodiment, the portable terminal is beneficial to controlling the carrying-out and the use of the portable terminal.

According to another embodiment of the present invention, a charging stand comprises a cradle control circuit, wherein the charging stand charges the portable terminal when the portable terminal is in a charging mode, and the cradle control circuit comprises a cradle charging terminal, a sensing resistor, two sensing nodes and a controlled element. The sensing resistor is coupled to the seat frame charging terminal. The two sensing nodes are directly coupled to two ends of the sensing resistor respectively. The sensing resistor is coupled between the charging end of the seat frame and the controlled element. When the portable terminal is in the charging mode, the original signal is input from the terminal charging terminal to the cradle charging terminal, and then output from the two sensing nodes as two sensing signals respectively, wherein the two sensing signals are used for controlling the controlled element. Therefore, the complexity of the power line carrier circuit is reduced under the condition that the number of external pins of the portable terminal and the charging seat is not increased.

The charging stand according to the foregoing embodiment, wherein the controlled element can be one of an actuating element and a light emitting element.

The charging stand according to the aforementioned embodiments, wherein the controlled element can be an actuating element, and the controlled element is used to lock and unlock the portable terminal to the charging stand.

The charging stand according to the foregoing embodiments, wherein the resistance value of the sensing resistor can be between 0.001Ohm and 0.1 Ohm. The cradle control circuit may further include an amplifier coupled between the sensing resistor and the controlled device, the amplifier amplifying a voltage difference between two input sensing signals and outputting an amplified signal, a voltage gain of the amplifier being between 10 and 1000, the amplified signal being used to control the controlled device.

The charging stand according to the previous embodiment, wherein the stand control circuit may further comprise a comparator and a controller. The comparator is coupled between the amplifier and the controlled element. The controller is coupled between the comparator and the controlled element, the amplified signals are sequentially input into the comparator and the controller, and the amplified signals are converted into control signals by the controller to be output to and control the controlled element.

Through the charging seat of the aforementioned embodiment, the auxiliary signal is output to the controller in the form of high and low levels of an accurate digital signal, so that the controller generates a control signal to drive the controlled element.

Drawings

Fig. 1 illustrates a perspective view of a portable terminal according to an embodiment of the present invention;

fig. 2 illustrates another perspective view of the portable terminal of fig. 1;

FIG. 3 is a perspective view of a charging dock according to another embodiment of the present invention;

fig. 4 is a schematic view showing a state of use of the portable terminal of fig. 1 and the cradle of fig. 3;

FIG. 5 is a block diagram illustrating the portable terminal of FIG. 1 and the charging cradle of FIG. 3 in a charging mode;

fig. 6 illustrates a circuit diagram of a terminal control circuit of the portable terminal of fig. 1;

FIG. 7 shows a partial circuit diagram of the cradle control circuitry of the charging dock of FIG. 3; and

fig. 8 illustrates a measurement result diagram of a terminal control circuit of the portable terminal of fig. 1.

Description of reference numerals:

a portable terminal: 100

An input interface: 105. 106, 107, 108

Groove: 147

A terminal control circuit: 103

Grounding end: 109

A terminal charging end: 110

A semiconductor element: 120

A first end: 121

A second end: 122

A third end: 123

A diode: 156

An inductor: 157

A capacitor: 161. 162, 163, 164, 165, 166

A resistor: 181. 182, 183, 184, 185, 186, 187

A power supply node: 151

A charging seat: 200

A containing groove: 202

Seat frame control circuit: 203

Grounding end: 209

Seat frame charging end: 210

A sense resistor: 220

A sensing node: 221. 222 to x-ray diffraction grating

An amplifier: 230

A comparator: 234

A controller: 240

Controlled element: 247. 248 to

A diode: 256

A capacitor: 261. 262, 263, 264, 265, 266, 267, 268, 269, 270, 271 resistors: 281. 282, 283, 284, 285, 286, 287, 288

A power supply node: 251. 252, 253, 254

Reference voltage node: 255

Identification card: 700

The user: 800

Original signal: s10

Sensing signal: s21, S22

Amplifying the signal: s23

Control signals: s27, S28

Voltage waveform: v1

Current waveform: i1

High voltage: v11

Low voltage: v12

High current: i11

Low current: i12

Detailed Description

Various embodiments of the present invention will be described below with reference to the accompanying drawings. For the purpose of clarity, numerous implementation details are set forth in the following description. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, these implementation details are not necessary. In addition, some conventional structures and elements are shown in simplified schematic form in the drawings for the sake of simplicity; and repeated elements will likely be referred to using the same reference numerals.

Referring to fig. 1 to 4, fig. 4 is a schematic diagram illustrating a usage state of the portable terminal 100 of fig. 1 and the charging cradle 200 of fig. 3, that is, fig. 4 is a schematic diagram illustrating the portable terminal 100 in a charging mode. When the portable terminal 100 according to the present invention is in the charging mode, the portable terminal 100 is charged by the cradle 200 according to the present invention. Further, it is understood that the portable terminal 100 can be charged by other charging sockets (not shown) according to the present invention, and the charging socket 200 can charge other portable terminals (not shown) according to the present invention.

Referring to fig. 5 to 7, the portable terminal 100 includes a terminal control circuit 103, and the terminal control circuit 103 includes a terminal charging terminal 110 and a semiconductor device 120. The number of external pins (i.e., external terminals) used for charging of the portable terminal 100 is two, and the external pins are respectively a terminal charging terminal 110 and a ground terminal 109 thereof. The number of the external pins of the charging stand 200 for charging the terminal charging terminal 110 is two, which are respectively the cradle charging terminal 210 and the ground terminal 209 thereof. When the portable terminal 100 is in the charging mode, the terminal charging terminal 110 is directly coupled to the cradle charging terminal 210, the ground terminal 109 is directly coupled to the ground terminal 209, and the charging power is inputted to the terminal charging terminal 110 from the cradle charging terminal 210. The semiconductor device 120 includes a first terminal 121 and a second terminal 122, the second terminal 122 is coupled to the terminal charging terminal 110, the original signal S10 is inputted into the semiconductor device 120 from the first terminal 121 and outputted from the second terminal 122 to the terminal charging terminal 110, and then inputted into the cradle charging terminal 210 for controlling the controlled

elements

247 and 248 on the cradle 200. Therefore, the portable terminal 100 and the cradle 200 can maintain the original number of external pins, and reduce the complexity of the Power Line Carrier (PLC) circuit.

Furthermore, the term "coupled" as used herein refers to electrical Coupling (electrical Coupling), and it should be understood that electrical parameters, such as voltage, current, etc. (not limited thereto), of the original signal S10 and other signals (such as the sensing signals S21, S22, the amplified signal S23, the control signals S27, S28, and the charging power) may be different at different nodes of the circuit.

As can be seen from fig. 3 to 7, the charging cradle 200 according to another embodiment of the present invention comprises a cradle control circuit 203, wherein the cradle control circuit 203 comprises a cradle charging terminal 210, a sense resistor 220, two sensing nodes (specifically, sensing nodes 221 and 222), and controlled

elements

247 and 248. The cradle charging terminal 210 is directly coupled to the terminal charging terminal 110 of the portable terminal 100, and the cradle 200 charges the portable terminal 100. The sense resistor 220 is coupled to the cradle charging terminal 210. The two

sensing nodes

221, 222 are directly coupled to and adjacent to two ends of the sensing resistor 220, respectively. The sense resistor 220 is coupled between the cradle charging terminal 210 and the controlled

elements

247, 248.

The charging power is input from the cradle charging terminal 210 to the terminal charging terminal 110, the original signal S10 is input from the terminal charging terminal 110 to the cradle charging terminal 210, and then two sensing signals S21, S22 are output from the two

sensing nodes

221, 222, respectively, and the two sensing signals S21, S22 are used to control the controlled

elements

247, 248. Therefore, the portable terminal 100 and the cradle 200 can reduce the complexity of the power line carrier circuit without increasing the number of external pins. Furthermore, with the semiconductor device 120 of the terminal control circuit 103 and the sensing resistor 220 of the cradle control circuit 203, it is helpful for neither the portable terminal 100 nor the charging cradle 200 to add a control signal pin, i.e. the original charging power pin is used to transmit a control signal, so as to realize the control function between the charging device (i.e. the charging cradle 200) and the device to be charged (i.e. the portable terminal 100), and at the same time, reduce the complexity of the power line carrier circuit.

With respect to the portable terminal 100 according to the present invention, as can be further seen from fig. 4 and 5, the controlled element 247 of the cradle 200 can be an Actuating (activating) element, and the controlled element 247 is used for locking and unlocking the portable terminal 100 to and from the cradle 200. Therefore, it is not necessary to arrange a storage device for the portable terminal 100, and the charging cradle 200 can be used for charging and storing the portable terminal 100, and also for controlling the carrying out and using of the portable terminal 100. Specifically, the controlled elements 247 of the charging stand 200 are Solenoid valves (solenoids) among the actuating elements, and the portable terminal 100 includes the recess 147. When the original signal S10 and the two sensing signals S21 and S22 are signals for locking the portable terminal 100 to the charging dock 200, the controlled element 247 is activated to lock into the recess 147, so that the portable terminal 100 is locked to the charging dock 200. When the original signal S10 and the two sensing signals S21 and S22 are signals for unlocking the portable terminal 100 from the charging dock 200, the controlled element 247 is actuated to disengage from the recess 147, so that the portable terminal 100 is unlocked from the charging dock 200, and the user 800 can take the portable terminal 100 out of the charging dock 200.

The original signal S10 can be determined according to the determination information in the portable terminal 100, which includes at least one of identity information and time information. Therefore, the corresponding original signal S10 can be generated according to different determination information to control the controlled

elements

247 and 248 on the charging stand 200 to be in different operation states.

The portable terminal 100 may further include input interfaces 105, 106, 107, and 108, the determination information is input through at least one of the input interfaces 105, 106, 107, and 108, and each of the input interfaces 105, 106, 107, and 108 is one of a wireless communication receiver, a radio frequency identification Reader (RFID Reader), an infrared receiver, a barcode sensor, a physiological signal receiver, a camera module, a touch screen, and a key. Therefore, it is helpful to improve the applicability and management convenience of the portable terminal 100. In the embodiment, the portable terminal 100 further includes input interfaces 105, 106, 107, and 108, wherein the input interface 105 is a barcode sensor, the input interface 106 is a wireless communication receiver, the input interface 106 can also be a wireless communication transceiver, such as a mobile communication transceiver and a wireless network transceiver, but not limited thereto, the input interface 107 is a touch screen, and the input interface 108 is a key and is also a physiological signal receiver for fingerprint identification.

The terminal charging terminal 110 may be directly coupled to the cradle charging terminal 210 in a wired manner, and the charging power source may be a dc charging power source. Therefore, using a dc charging power supply in a wired manner further helps to reduce the complexity of the terminal control circuit 103 and the cradle control circuit 203. In addition, the original signal S10 can be a digital signal, an Analog (Analog) signal, or a signal composed of two voltage values (e.g., high voltage and low voltage) arranged. According to another embodiment of the present invention (not shown), the terminal charging terminal can be directly coupled to the cradle charging terminal in a wireless manner, and the charging power source can be an ac charging power source.

Referring to fig. 8, which shows a schematic diagram of the measurement result of the terminal control circuit 103 of the portable terminal 100 of fig. 1, fig. 8 is a screenshot of an oscilloscope, which illustrates a voltage waveform v1 and a current waveform i1 of the original signal S10 at the first end 121 of the semiconductor device 120. As shown in fig. 5, 6, and 8, the semiconductor device 120 may be a Field-Effect Transistor (FET), and the semiconductor device 120 further includes a third terminal 123, wherein the first terminal 121 is a Gate (Gate), the second terminal 122 is a Drain (Drain), and the third terminal 123 is a Source (Source). Therefore, the semiconductor device 120 can be used as a switch to output the on and off signal voltage and signal current at the second terminal 122 (drain) correspondingly by arranging the gate source voltage inputted to the first terminal 121 with a proper high voltage value (also referred to as high level) and a proper low voltage value (also referred to as low level) as the original signal S10, which is helpful for the accuracy of signal transmission between the portable terminal 100 and the cradle 200 and reduces power consumption. Specifically, the third terminal 123 (source) is coupled to a Ground plane (Ground), and the semiconductor device 120 is a MOSFET (metal oxide semiconductor field effect transistor) having a large enough drain-source current when it is turned on. In fig. 8, the high voltage v11 makes the first end 121 (gate) and the second end 122 (drain) conduct in time with the high current i 11. The low voltage v12 is temporally corresponding to the low current i12, and turns off between the first end 121 (gate) and the second end 122 (drain). The high voltage V11 may be between 1.0V and 3.5V (the ranges are inclusive, the high voltage V11 is specifically, for example, 1.8V), and the high current i11 may be between 60mA and 180mA (for example, 128 mA). According to other embodiments of the present invention (not shown), the semiconductor device may be a Diode (Diode), a Bipolar Junction Transistor (BJT), wherein the types of the semiconductor devices and the signal application methods are not limited to the contents described in this section.

In the circuit diagram of the terminal control circuit 103 shown in fig. 6, the battery of the portable terminal 100 is charged by the charging power input to the portable terminal 100 by the charger 200 via the power supply node 151, and the charging power may be 5V. The original signal S10 is inputted to the first end 121 (gate) of the semiconductor device 120 after passing through the resistor 181, and the resistance of the resistor 181 may be between 10kOhm and 1MOhm (including the resistance endpoints 10kOhm and 1MOhm, the same applies hereinafter). The

resistors

184, 185, 186, 187 serve as current limiting resistors, and the resistance value thereof may be between 20Ohm to 2 kOhm. The

capacitors

161, 162, 163, 164, 165, 166 are connected in series to further block the charging power current from flowing into the ground plane, and the capacitance of the

capacitors

161, 162, 163, 164, 165, 166 may be between 0.01uF (Micro faraday) and 10 uF. Moreover, the resistance of the resistor 182 may be between 10kOhm and 1MOhm, the resistance of the resistor 183 may be between 100kOhm and 10MOhm, the inductance of the inductor 157 may be between 33nH and 3300nH, and the saturation current may be between 1A and 10A, and the diode 156 is specifically a Transient Voltage Suppression (TVS) diode.

In short, according to the embodiment of the present invention, the portable terminal 100 utilizes the MOSFET type semiconductor device 120 as a switch, and the terminal charging terminal 110 (i.e. the charging pin of the portable terminal 100) is coupled for switching control, i.e. a specific signal (i.e. the original signal S10 on the portable terminal 100) composed of a switch-type signal arrangement is generated. When the charging dock 200 senses a specific signal, the controlled element 247, specifically, the solenoid valve, can be activated to correspondingly lock or unlock the portable terminal 100 to or from the charging dock 200. Further, through cooperation between software and hardware, the charging stand 200 can generate different corresponding behavior patterns according to different specific signals, for example, the charging stand 200 can generate a behavior pattern for locking and unlocking the controlled element 247, and can also generate a behavior pattern for lighting the red, blue, and green signals of the controlled element 248.

For example, in fig. 4, the input interface 105 of the portable terminal 100 can have the functions of scanning the bar code of goods in a store and scanning the bar code of the identification card 700 of the user 800 (i.e. the employee in the store), the charging stand 200 of the portable terminal 100 is fixed on the wall, the portable terminal 100 is inserted into the receiving slot 202 of the charging stand 200 for charging, and can be expanded into a plurality of portable terminals 100 and a plurality of charging stands 200 as shown in fig. 4. When the store has strict requirements on the quantity management and control of the portable terminal 100 and the portable terminal 100 is required to be not freely extracted from the charging cradle 200 for use by the user 800, the embodiment designs a mechanism for adding unlocking and locking on the charging cradle 200, and can scan the bar code of the identification card 700 through the input interface 105 of the portable terminal 100, and simultaneously manage and control the quantity of the portable terminal 100 through the network connection mode by the input interface 106, which not only meets the requirement of practical application, but also can meet the requirement of unlocking and locking without additionally adding an I/O interface (i.e. external pin) on the charging cradle 200. According to other embodiments of the present invention (not shown), the type, function and charging cradle of the portable terminal are not limited to the embodiments described in this paragraph.

With respect to the charging stand 200 according to the present invention, as can be further understood from fig. 3 to 5, each of the controlled

elements

247, 248 can be one of an actuating element and a light emitting element. Accordingly, the cradle 200 can prompt the user 800 of the current state of the portable terminal 100 and serve to manage the use of the portable terminal 100. Specifically, the controlled element 247 is an actuating element, the controlled element 248 is a light-emitting element, and the user 800 can first know the current state of the portable terminal 100 through the controlled element 248 and also know whether the current actuation mode (e.g., locking or unlocking) of the controlled element 247 allows the user 800 to take a corresponding operation.

The controlled elements 247 can be actuating elements, and the controlled elements 247 are used to lock and unlock the portable terminal 100 to the charging stand 200. Therefore, the charging dock 200 can be used for charging and storing the portable terminal 100, and also for controlling the carrying out and using of the portable terminal 100.

As can be seen from fig. 5 to 7, the resistance of the sensing resistor 220 may be between 0.001Ohm and 0.1 Ohm. The cradle control circuit 203 may further include an amplifier 230 coupled between the sense resistor 220 and the controlled

elements

247 and 248, the amplifier 230 amplifies a voltage difference between the two input sense signals S21 and S22 and outputs an amplified signal S23, a voltage gain of the amplifier 230 may be between 10 and 1000, and the amplified signal S23 is used to control the controlled

elements

247 and 248. Therefore, the voltage difference between the on signal and the off signal is amplified to facilitate the use of the subsequent circuit elements, and the noise can be effectively reduced after the slight voltage difference changes through the amplifier 230. In the illustrated embodiment, the sense resistor 220 is a current sense resistor having a resistance value of 0.02Ohm, and the voltage gain of the amplifier 230 may be 200.

The mount control circuit 203 may further comprise a comparator 234 and a controller 240, wherein the controller 240 is in particular a microcontroller. The comparator 234 is coupled between the amplifier 230 and the controlled

elements

247 and 248, the controller 240 is coupled between the comparator 234 and the controlled

elements

247 and 248, the amplified signal S23 is sequentially inputted into the comparator 234 and the controller 240, and the amplified signal S23 is converted by the controller 240 into control signals S27 and S28 to be respectively outputted to and controlling the controlled

elements

247 and 248. Thus, the comparator 234 can output the signal to the controller 240 in the form of a high-low level of an accurate digital signal, so that the controller 240 can generate the control signals S27, S28 to drive the controlled

elements

247, 248.

In the partial circuit diagram of the cradle control circuit 203 shown in fig. 7, the charging power flowing through the power supply node 251 is input to the terminal charging terminal 110 from the cradle charging terminal 210 after passing through the sense resistor 220 to charge the battery of the portable terminal 100. The supply voltage through

supply nodes

252, 254 may be 5V, the supply voltage through supply node 253 may be 12V, and the reference voltage of comparator 234 is passed through reference voltage node 255 for input to comparator 234. Moreover, the resistance of the resistor 281 may be 0Ohm, the resistances of the

resistors

282 and 283 may be between 1Ohm and 100Ohm, the resistances of the

resistors

284 and 288 may be between 1kOhm and 100kOhm, the resistance of the resistor 285 may be between 10kOhm and 1MOhm, the resistance of the resistor 286 may be between 20Ohm and 2kOhm, and the resistance of the resistor 287 may be between 220khm and 22 MOhm. The capacitance values of the

capacitors

261, 262, 264, 266, 267, 268, 269 may be between 0.01uF and 10uF, the capacitance values of the

capacitors

263, 265 may be between 100pF and 10nF, the capacitance values of the

capacitors

270, 271 may be between 2.2uF and 220uF, and the diode 256 is specifically a transient voltage suppressor diode.

In short, according to the embodiment of the present invention, the portable terminal 100 utilizes the semiconductor device 120 of the MOSFET type to switch, when the first terminal (gate) of the semiconductor device 120 inputs a specific signal (i.e. the original signal S10), the second terminal (drain) together with the power supply node 151 will generate a change in voltage level. Then, the

sensing nodes

221 and 222 at two ends of the sensing resistor 220 of the charging dock 200 respectively output the sensing signals S21 and S22, and a slight voltage difference change is generated between the sensing signals S21 and S22. By using the amplifier 230 and its circuitry, the small voltage difference variations can be amplified by a factor of 200. The amplified variation is converted into a working voltage signal of the controller 240 by the comparator 234, so that the controller 240 can distinguish the behavior pattern represented by the signal. The controller 240 can transmit the control signals S27 and S28 representing the behavior mode through the GPIO pin, so as to actuate the controlled element 247, which is specifically an electromagnetic valve, or the controlled element 248, which is specifically an LED light-emitting element, to realize the mechanism switch on the charging stand 200, and execute unlocking, locking, and lighting the controlled element 248, which is specifically a light-emitting element.

As another example of the use state, the portable terminal 100 may be placed in a warehouse room managed uniformly inside a company. When the user 800 (i.e., the employee of the company) goes to work or leaves work, the user can use his/her own id card 700 to sense the card-swiping networking device going to work or leaves work. When the network receives the identification signal corresponding to the identification card 700, the network transmits the signal to the input interface 106 of the corresponding portable terminal 100 through a network connection. After receiving the signal, the portable terminal 100 drives the controlled element 248 on the charging dock 200 to turn on the green light, and drives the controlled element 247, which is specifically an electromagnetic valve, to unlock, so that the user 800 can insert and pull the portable terminal 100 from the charging dock 200 at will.

For example, when the portable terminal 100 is fully charged on the charging dock 200 or can be used, the controlled element 248 can turn on a green light and unlock the controlled element 247, so that the user 800 can determine whether to allow the portable terminal 100 on the charging dock 200 to be taken out or used according to the color of the controlled element 248.

For example, the portable terminal 100 can monitor the current network environment status, the portable terminal 100 can transmit a specific signal to the charging dock 200, and the user 800 can be reminded of the current network environment status through the light color and flashing manner of the controlled element 248.

For another example, if the portable terminal 100 is not charged completely, even if the input interface 106 of the portable terminal 100 receives a signal, the portable terminal 100 can drive the controlled element 248 to display a red light and does not activate the unlocking function of the controlled element 247, so that the user 800 knows that the charging is not completed and the portable terminal 100 cannot be used.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A portable terminal comprising a terminal control circuit, wherein the portable terminal is charged by a charging cradle when the portable terminal is in a charging mode, the terminal control circuit comprising:

a terminal charging terminal, when the portable terminal is in the charging mode, the terminal charging terminal is directly coupled with a seat frame charging terminal of the charging seat; and

a semiconductor device including a first terminal and a second terminal, the second terminal being coupled to the terminal charging terminal;

when the portable terminal is in the charging mode, a charging power is input from the cradle charging terminal to the terminal charging terminal, an original signal is input from the first terminal to the semiconductor device and output from the second terminal to the terminal charging terminal, and then input to the cradle charging terminal for controlling a controlled element on the charging cradle.

2. The portable terminal of claim 1, wherein the controlled element is an actuating element, and the controlled element is used to lock and unlock the portable terminal to the charging dock.

3. The portable terminal of claim 1, wherein the original signal is determined according to a determination information in the portable terminal, the determination information comprising an identity information.

4. The portable terminal of claim 3, further comprising an input interface, wherein the determination information is inputted through the input interface, and the input interface is one of a wireless communication receiver, a radio frequency identification reader, an infrared receiver, a barcode sensor, a physiological signal receiver, a camera module, a touch screen, and a button.

5. The portable terminal of claim 1, wherein the terminal charging terminal is directly coupled to the cradle charging terminal in a wired manner when the portable terminal is in the charging mode, and the charging power source is a dc charging power source.

6. The portable terminal of claim 5, wherein the semiconductor device is a field effect transistor, the semiconductor device further comprising a third terminal, the first terminal being a gate, the second terminal being a drain, and the third terminal being a source.

7. A cradle comprising a cradle control circuit, the cradle charging the portable terminal when the portable terminal of claim 1 is in the charging mode, the cradle control circuit comprising:

the charging terminal of the seat frame;

a sensing resistor coupled to the charging terminal of the base frame;

two sensing nodes respectively and directly coupled to two ends of the sensing resistor; and

the controlled element, wherein the sense resistor is coupled between the cradle charging end and the controlled element;

when the portable terminal is in the charging mode, the original signal is input from the terminal charging terminal to the cradle charging terminal, and then output from the two sensing nodes as two sensing signals respectively, wherein the two sensing signals are used for controlling the controlled element.

8. The charging dock of claim 7, wherein the controlled element is one of an actuating element and a light emitting element.

9. The charging dock of claim 8, wherein the controlled element is the actuating element, and the controlled element is used to lock and unlock the portable terminal to the charging dock.

10. The charging dock of claim 7, wherein the resistance of the sense resistor is between 0.001Ohm and 0.1Ohm, the cradle control circuit further comprising:

and the amplifier is coupled between the sensing resistor and the controlled element, amplifies the voltage difference between the two input sensing signals and outputs an amplified signal, the voltage gain of the amplifier is between 10 and 1000, and the amplified signal is used for controlling the controlled element.

11. The charging dock of claim 10, wherein the cradle control circuit further comprises:

a comparator coupled between the amplifier and the controlled element; and

and the controller is coupled between the comparator and the controlled element, and the amplified signal is sequentially input into the comparator and the controller and is converted into a control signal by the controller to be output to and control the controlled element.