Charging cable with display function

Abstract

This patent discloses a charging cable with a display function, including a first interface, a second interface, and a cable connecting the first and second interfaces. The first interface is equipped with a detection circuit, a control circuit, a control unit, a display device, and a memory. The detection circuit detects charging signals from the charging cable, which include at least two types. The control unit can send touch signals to the control circuit. The control circuit controls the memory to store all charging signals. Based on the touch signal, the control circuit selects and retrieves a charging signal from the memory, latches the currently retrieved charging signal, and controls the display device to display it. The control circuit of this charging cable has a latching function, allowing it to display the previously selected charging information each time it is viewed, making the charging cable convenient to use while displaying multiple charging information types.

Description

Technical Field

[0001] This utility model relates to the field of charging, and more particularly to a charging cable for charging handheld devices. Background Technology

[0002] With the advancement of technology, electronic products are becoming increasingly thinner and smaller. Handheld devices, such as tablet computers, smartphones, and audio-visual players, which are indispensable personal items in daily life, all have their own chargers and charging devices to deliver electrical energy from the power supply to the handheld devices for charging and data transmission.

[0003] To help users monitor the charging status, existing charging cables often have displays showing information such as charging current, voltage, power, and direction. However, due to the small size of the charging cable, the size and number of displays and switches are limited, and current cables typically only display one type of charging information. To view the desired information, users often need to press the switch multiple times. If the desired information is listed later in the sequence, users have to press the switch multiple times each time they want to view it, making it quite inconvenient.

[0004] Therefore, there is an urgent need for a charging cable with a display function that can solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a charging cable with a display function. The control circuit of this charging cable has a latching function, which can display the previously selected charging information each time it is viewed, making the charging cable convenient to use while displaying multiple charging information.

[0006] To achieve the above objectives, this utility model provides a charging cable with a display function, including a first interface, a second interface, and a cable connecting the first interface and the second interface. The first interface or the second interface can be electrically connected to a handheld device to charge the handheld device. The cable includes a power cord. A charging circuit for charging the handheld device is formed between the first interface, the second interface, and the power cord. A circuit board and a display device are disposed on the first interface. The circuit board has a detection circuit, a control circuit, a control unit, and a memory. The detection circuit detects the charging signal of the charging circuit. The charging signal includes at least two types. Operating the control unit can send a touch signal to the control circuit. The control circuit controls the memory to store all charging signals. The control circuit selects and retrieves a charging signal from the memory based on the touch signal, latches the type of the currently retrieved charging signal, and controls the display device to display the charging signal of the current type.

[0007] Preferably, the control circuit includes a processing chip, and the memory is built into the processing chip.

[0008] Preferably, the charging signal includes a combination of two or more of the following: charging current, charging voltage, charging power, temperature, charging direction, and handheld device power information.

[0009] Preferably, the control circuit also switches the display of the charging signal based on the touch signal.

[0010] Preferably, the control unit can also generate a flip command, and the control circuit controls the display device to flip and display the charging signal according to the flip command.

[0011] Preferably, the control unit can also generate an automatic cycle command, and the control circuit controls the display device to automatically cycle and display the charging signal according to a preset sequence based on the automatic cycle command.

[0012] Preferably, the charging cable further includes a gravity sensor, which generates a direction signal, and the control circuit controls the display device to display the charging signal in a positive direction based on the direction signal.

[0013] Preferably, the charging cable further includes an on / off switch connected in series with the charging line. The charging signal includes charging current and / or charging voltage and / or charging power and / or temperature. The control circuit controls the on / off state of the on / off switch based on the charging current and / or charging voltage and / or charging power and / or temperature. The on / off switch can be a MOSFET or a relay switch, etc.

[0014] Specifically, the control circuit controls the on / off switch to open when the charging current is less than a first preset value, so as to cut off power when fully charged.

[0015] Specifically, the control circuit also obtains the power signal in the handheld device from the first or second interface connected to the handheld device via a signal line, and controls the on / off switch to disconnect when the power signal is greater than a preset value, so as to disconnect the power when fully charged.

[0016] Specifically, the control circuit controls the on / off switch to open when the charging current is greater than a second preset value, in order to perform overcurrent protection.

[0017] Specifically, the control circuit controls the on / off switch to disconnect when the charging voltage is greater than a third preset value, in order to perform overvoltage protection.

[0018] Specifically, the control circuit controls the on / off switch to open when the charging power is greater than a preset value, so as to perform overcurrent short circuit protection.

[0019] Preferably, the display device includes a power display unit, which consists of multiple indicator lights arranged side by side. The control circuit displays a corresponding number of indicator lights based on the power level of the handheld device; the higher the power level, the more indicator lights illuminate. The control circuit can obtain the power level information by communicating with the handheld device, by using the charging current, or by using the charging power.

[0020] Preferably, the display device includes an LED light display screen, a digital display screen, or a liquid crystal display screen.

[0021] Preferably, the control unit is a touch button, a capacitive sensing device, or a touch point, and the control circuit sorts the charging signals according to their type, displays the charging signals sequentially according to the touch signals, and latches them.

[0022] Preferably, the processing chip is a PT5F2307F24, the TCH touch channel of the processing chip is connected to the output terminal of the control unit, and the GPIO output pin of the processing chip is connected to the display device.

[0023] Compared with the prior art, the control circuit of the charging cable of this utility model has a latching function. Through the cooperation of the control circuit and the memory, the currently selected charging signal is latched and the display device is controlled to display it. The previously selected charging information can be displayed each time it is viewed, so that the charging cable can display a variety of charging information while being convenient to use and meeting the user's personalized needs. Attached Figure Description

[0024] Figure 1 This is a circuit diagram of the charging cable with display function according to this utility model.

[0025] Figure 2 This is the pin wiring diagram of the processing chip U1 of this utility model.

[0026] Figure 3 This is a structural diagram of an embodiment of the charging cable with display function according to this utility model.

[0027] Figure 4 This is a structural diagram of another embodiment of the charging cable with display function of this utility model. Detailed Implementation

[0028] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] refer to Figures 1 to 3This utility model discloses a charging cable 100 with a display function, including a first interface 11, a second interface 12, and a cable 13 connecting the first interface 11 and the second interface 12. The first interface 11 or the second interface 12 can be electrically connected to a handheld device to charge the handheld device. The cable 13 includes a power cord. A charging line for charging the handheld device is formed between the first interface 11, the second interface 12, and the power cord 13. A circuit board and a display device 40 are provided on the first interface 11 and / or the second interface 12. The circuit board has a detection circuit, a control circuit 31, a control unit 33, and a memory 32. The detection circuit detects the charging signal of the charging line, and the charging signal includes... The control unit 33 can send a touch signal to the control circuit 31 by operating the control unit 33, which can send a combination of two or more types of charging signals (including any combination of two charging signal types) such as charging current, charging voltage, charging power, temperature, charging direction, and handheld device power information. The control circuit 31 controls the memory 32 to store all current charging signals in real time. The control circuit 31 selects and retrieves a charging signal (charging current, charging voltage, charging power, temperature, charging direction, or handheld device power information) from the memory based on the touch signal, latches the type of the currently retrieved charging signal (charging current, charging voltage, charging power, temperature, charging direction, or handheld device power information), and controls the display device to display the charging signal.

[0030] The charging signal of this invention can have two types, or it can have three, four, or five types.

[0031] The control unit 33 is a touch button, a capacitive sensing device, a touch point, an operation switch, or other sensing device that can sense human operation. The control circuit 31 sorts the charging signals according to type, displays the charging signals in sequence according to the touch signals, and latches them.

[0032] During operation, the user connects the power supply and the handheld device to the first interface 11 and the second interface 12 respectively, so that the power supply charges the handheld device through the charging cable 100. If the charging cable 100 is being used for the first time, the display device 40 displays the first charging signal in a preset order, such as charging current, charging voltage, charging power, temperature, charging direction, and a black screen. On first use, the charging cable 100 displays the current charging current. If the user operates the control unit 33 once, inputting a touch signal to the control circuit 31, the control circuit 31 will... The user switches to the next charging signal based on the touch signal, and starts displaying the charging voltage. Then, the control unit 33 is operated again, inputting a touch signal to the control circuit 31. The control circuit 31 switches to the next charging signal based on this touch signal, and starts displaying the charging voltage. The user then operates the control unit 33 again, displaying the charging power; then, the user operates the control unit 33 again, displaying the temperature of the charging cable 100; then, the user operates the control unit 33 again, and the display device 40 displays the charging direction; then, the user operates the control unit 33 again, and the display device goes black; then, the user operates the control unit 33 again, and the display device 40 displays the charging current, starting the next cycle. If the user ultimately controls the display device 40 to display the charging power, then when the user plugs and unplugs the charging cable 100, the display device 40 will automatically display the charging power the next time the charging cable 100 is used, instead of other charging signals, to remember and latch the type of the current charging signal for display upon reuse.

[0033] Of course, alternatively, the control unit 33 can directly input a touch signal corresponding to the charging signal, so that the control circuit 31 directly controls the display device to display that type of charging signal and latch the type of the charging signal. For example, if a touch signal corresponding to the charging current is input, the control circuit 31 directly controls the display device 40 to display the charging current and latch the type of the charging signal; if a touch signal corresponding to the temperature is input, the control circuit 31 directly controls the display device 40 to display the temperature and latch the type of the charging signal.

[0034] The control circuit 31 includes a processing chip U1, and the memory 32 is built into the processing chip U1. Specifically, the processing chip U1 is a PT5F2307F24. The TCH touch channel (pin 4) of the processing chip U1 is connected to the output terminal of the control unit 33, and the GPIO output pins (pins 5, 6, 8, 13, 17, 18, and 9-11) of the processing chip U1 are connected to the display device 40. GPIO output pins (General-purpose input / output) are general-purpose input / output pins.

[0035] Specifically, operating the control unit 33 can also generate a flip command. The control circuit 31 then controls the display device 40 to flip 180 degrees to display the charging signal based on the flip command. A flip command can be input by pressing and holding the control unit 33 for 5 seconds. In addition, the charging cable also includes a gravity sensor that generates a direction signal. The control circuit 31 then controls the display device to display the charging signal in the forward direction based on the direction signal. Alternatively, a touchscreen can be used as the display device, displaying an operable flip button or a flip gesture command. Operating the flip button or gesture command inputs the corresponding flip command, causing the control circuit 31 to control the display device to flip and display the charging signal based on the flip command.

[0036] Specifically, operating the control unit 33 can generate an automatic cycle command. The control circuit 31 controls the display device 40 to automatically cycle and display the charging signal in a preset order according to the automatic cycle command. For example, pressing and holding the control unit 33 for 3 seconds generates an automatic cycle command, which automatically cycles and displays the charging current, charging voltage, charging power, temperature, and charging direction.

[0037] refer to Figure 1 The charging cable 100 also includes an on / off switch 34 connected in series with the charging line, and the control circuit 31 controls the on / off switch 34 according to the charging current and / or charging voltage.

[0038] Specifically, the control circuit 31 controls the on / off switch 34 to open when the charging current is less than a first preset value, so as to cut off power when fully charged. In another embodiment, the control circuit 31 also obtains the power signal from the first interface 11 or the second interface 11 connected to the handheld device via a signal line, and controls the on / off switch 34 to open when the power signal is greater than a preset value, so as to cut off power when fully charged.

[0039] Specifically, the control circuit controls the on / off switch 34 to open when the charging current exceeds a second preset value, for overcurrent protection. The first preset value is less than the second preset value. Specifically, the control circuit controls the on / off switch to open when the charging voltage exceeds a third preset value, for overvoltage protection. The third preset value is 5.8V.

[0040] Preferably, the display device includes a power display unit. In this embodiment, the display device is divided into a conventional charging information display unit and a power display unit. The charging information display unit displays charging information as described above. The power display unit consists of multiple indicator lights arranged side by side. The control circuit displays a corresponding number of indicator lights based on the power level of the handheld device; the higher the power level, the more indicator lights are lit. Specifically, the power level is indirectly determined by the charging power, which is divided into multiple zones. The higher the charging power, the fewer indicator lights are lit.

[0041] For example, using nine indicator lights as a power display unit, all nine lights are on when the charging power is below 1W. When the charging power is between 7 and 1W, the first eight lights are on, and the ninth light flashes or is off. When the charging power is between 11 and 7W, the first seven lights are on, the eighth light flashes or is off, and the ninth light is off. When the charging power is between 15 and 11W, the first six lights are on, the seventh light flashes or is off, and the eighth and ninth lights are off. When the charging power is between 19 and 15W, the first five lights are on, the sixth light flashes or is off, and the seventh to ninth lights are off. When the charging power is between 23 and 19W, the first four lights are on, the fifth light flashes or is off, and the sixth to ninth lights are off. When the charging power is between 27 and 23W, the first three lights are on, the fourth light flashes or is off, and the fifth to ninth lights are off. When the charging power is between 31 and 27W, the first two indicator lights are on, the third indicator light flashes or goes out, and the fourth to ninth indicator lights are off. When the charging power is between 35 and 31W, the first indicator light is on, the second indicator light flashes or goes out, and the third indicator light is off. When the charging power is above 35W, the first indicator light flashes or goes out, and the second to ninth indicator lights are off.

[0042] The display device 40 includes an LED display screen, a digital display screen, or a liquid crystal display screen. In this embodiment, the display device 40 is a three-color digital display screen. The colors of the digital display screen are controlled by pins 8-11 of the processing chip U1, and the specific lighting of the digital display screen is controlled by pins 5, 6, 8, 13, 17, and 18 of the processing chip U1.

[0043] refer to Figure 1 The detection circuit includes one or more of a current detection circuit 21, a voltage detection circuit 22, and a temperature detection circuit 23. The control circuit 31 also calculates the charging power based on the charging current and the charging voltage.

[0044] refer to Figure 1The current detection circuit 21 is a bidirectional current detection circuit, which can be used to detect the magnitude and direction of the charging current. Specifically, the current detection circuit 21 includes a first resistor R1 and a second resistor R2. The first resistor R1 and the second resistor R2 are connected in series on the bottom line of the power line, and the first resistor R1 and the second resistor R2 are grounded. The first end A of the first resistor R1, which is furthest from the second resistor R2, is connected to the control circuit 31 through the AD converter AD1. The second end B of the second resistor R2, which is furthest from the first resistor R1, is connected to the control circuit 31 through the AD converter AD2. The control circuit 31 uses this to identify the magnitude of the charging current based on the signals input by the AD converters AD1 and AD2. During operation, the AD converters AD1 and AD2 continuously input two signals, one positive and one negative. The positive signal is converted into a digital signal as the charging current. When the AD converter AD1 inputs a positive signal, the current charging direction is determined to be from the first interface 11 to the second interface 12. When the AD converter AD2 inputs a positive signal, the current charging direction is determined to be from the second interface 12 to the first interface 11.

[0045] refer to Figure 1 The voltage detection circuit 22 includes a third resistor R3 and a fourth resistor R4 connected in series between the positive line of the power supply and ground. The third resistor and the fourth resistor output a charging voltage signal. The control circuit 31 converts the charging voltage signal into a digital signal to obtain a digital charging voltage.

[0046] refer to Figure 1 The temperature detection circuit 23 includes a thermistor R connected in series between the rated voltage and ground. NTC And the fifth resistor R5, the thermistor R NTC The temperature signal is output between the thermistor R5 and the fifth resistor R6 to the control circuit 31, so that the control circuit 31 can obtain the current temperature on the circuit board. NTC The proximity processing chip U1 is configured. The control circuit 31 also controls the on / off switch 34 to open for over-temperature protection when the temperature exceeds a fourth preset value. Furthermore, the control circuit 31 also issues a high-temperature warning when the temperature exceeds a fifth preset value. If the fifth preset value is less than the fourth preset value (e.g., 90 degrees Celsius), the control circuit 31 controls the warning light in the display device 40 to flash rapidly when the temperature exceeds 90 degrees Celsius.

[0047] The display device 40 may be disposed on the first interface 11 (see reference). Figure 3 It can also be set on the second interface 12, or on the cable 13, or simultaneously on the first interface 11 and the second interface 12 (see reference). Figure 4 It is preferable to place it on the interface where it is plugged into the charging device.

[0048] Wherein, the first interface 11 and the second interface 122 are USB connectors. Specifically, the first interface 11 is a standard, Lightning, mini, micro, or Type-C USB connector, and the second interface 12 is a standard, Lightning, mini, micro, or Type-C USB connector. Specifically, the first interface 11 and the second interface 122 can also be the same type or different types of interfaces (see reference). Figure 3 (As shown).

[0049] Specifically, the cable 23 is also provided with a signal line (or signal transmission line) between the first interface 11 and the second interface 12, so that the bidirectional charging display can be used to transmit signals.

[0050] In this embodiment, the first interface 11 and the second interface 12 are plug-in interfaces. Of course, the first interface 11 and the second interface 12 can also be magnetic interfaces, wireless charging interfaces, or other interfaces.

[0051] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A charging cord with display function, comprising a first interface, a second interface and a cable connected between the first interface and the second interface, the first interface or the second interface is electrically connectable with a handheld device to charge the handheld device, the cable comprises a power cord, a charging line for charging the handheld device is formed between the first interface, the second interface and the power cord, characterized in that: The first interface is provided with a circuit board and a display device. The circuit board has a detection circuit, a control circuit, a control unit, and a memory. The detection circuit detects the charging signal of the charging line. The charging signal includes at least two types. The control unit can send a touch signal to the control circuit. The control circuit controls the memory to store all the charging signals. The control circuit selects and retrieves a charging signal from the memory based on the touch signal, latches the type of the currently retrieved charging signal, and controls the display device to display the charging signal of the current type.

2. The charging cable with display function as described in claim 1, characterized in that: The control circuit includes a processing chip, and the memory is built into the processing chip.

3. The charging cable with display function as described in claim 1, characterized in that: The charging signal includes two or more of the following: charging current, charging voltage, charging power, temperature, charging direction, and handheld device power information.

4. The charging cable with display function as described in claim 1, characterized in that: The control circuit also switches the display of the charging signal based on the touch signal; or... Operating the control unit can also generate a flip command, and the control circuit controls the display device to flip and display the charging signal according to the flip command; or... It also includes a gravity sensor that generates a direction signal, and the control circuit controls the display device to display the charging signal in a positive direction based on the direction signal; or... The control unit can also generate an automatic cycle command, and the control circuit controls the display device to automatically cycle and display the charging signal according to a preset sequence based on the automatic cycle command.

5. The charging cable with display function as described in claim 1, characterized in that: It also includes an on / off switch connected in series with the charging line, the charging signal including charging current and / or charging voltage and / or charging power and / or temperature, and the control circuit controls the on / off switch according to the charging current and / or charging voltage and / or charging power and / or temperature.

6. The charging cable with display function as described in claim 5, characterized in that: The control circuit controls the on / off switch to open when the charging current is less than a first preset value, so as to cut off power when fully charged; or, The control circuit also obtains the power signal in the handheld device from the first or second interface connected to the handheld device via a signal line, and controls the on / off switch to disconnect when the power signal is greater than a preset value, so as to disconnect the power when fully charged.

7. The charging cable with display function as described in claim 5, characterized in that: The control circuit controls the on / off switch to open when the charging current is greater than the second preset value, so as to perform overcurrent protection; And / or, The control circuit controls the on / off switch to open when the charging voltage is greater than a third preset value, so as to perform overvoltage protection; And / or, The control circuit controls the on / off switch to disconnect when the temperature is greater than the fourth preset value to perform over-temperature protection, and controls the display device to perform over-temperature warning when the temperature is greater than the fifth preset value, wherein the fourth preset value is greater than the fifth preset value. The control circuit controls the on / off switch to open when the charging power is greater than a preset value, so as to perform overcurrent short circuit protection.

8. The charging cable with display function as described in claim 1, characterized in that: The display device includes a power display unit, which consists of multiple indicator lights arranged side by side. The control circuit displays a corresponding number of indicator lights based on the power level of the handheld device. The higher the power level of the handheld device, the more indicator lights are lit.

9. The charging cable with display function as described in claim 1, characterized in that: The display device includes an LED light display screen, a digital display screen, or an LCD screen.

10. The charging cable with display function as described in claim 1, characterized in that: The control unit is a touch button, a capacitive sensing device, or a touch point. The control circuit sorts the charging signals according to their type, displays the charging signals sequentially according to the touch signals, and latches them.

11. The charging cable with display function as described in claim 2, characterized in that: The processing chip is a PT5F2307F24. The TCH touch channel of the processing chip is connected to the output terminal of the control unit, and the GPIO output pin of the processing chip is connected to the display device.

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