Human-computer interface device using super capacitor

Abstract

The utility model discloses a human-computer interface device using a super capacitor, which relates to a human-computer interface device and mainly comprises a power supply circuit and a main control module, the power supply circuit comprises a control unit and a quick charging unit, and the power supply circuit is detachably connected with an external direct-current power supply. The control unit is used for charging a super capacitor arranged in the human-computer interface device, the quick charging unit is electrically connected to the control unit and used for providing certain charging current to the super capacitor, the main control module is electrically connected to the power circuit and the super capacitor, and the main control module is used for monitoring capacitor voltage of the super capacitor. And driving to continue charging or stop charging. According to the utility model, not only can the defects caused by the use of a lithium battery be avoided, but also the charging efficiency can be improved, and precious time can be saved.

Description

Technical Field

[0001] The utility model relates to a human-machine interface device, and relates to a human-machine interface device using a supercapacitor. The supercapacitor replaces the conventional lithium battery, which avoids the pollution problem caused by the use of the lithium battery on the one hand, and can improve the charging efficiency and save precious time on the other hand by using the supercapacitor. Background Art

[0002] With the rapid development of technology, human-machine interface devices such as wireless keyboards, mice, and handwriting tablets have become an indispensable part of our daily life or work. These devices often rely on built-in batteries to provide the necessary energy. For a long time, lithium batteries have been widely used due to their relatively high energy density and long service life. However, with the increasing requirements for environmental protection and energy efficiency, conventional human-machine interface devices using lithium batteries have the following disadvantages:

[0003] First of all, lithium batteries may have serious impacts on the environment during their production, use and disposal. They contain harmful substances that may pollute soil and water sources, such as lithium, cobalt and nickel. If scrapped lithium batteries are not handled properly, these harmful substances will be released into the environment, causing long-term environmental problems.

[0004] Secondly, the charging time of lithium batteries is relatively long, which is a major inconvenience for human-machine interface devices that require fast charging and frequent use. Lithium batteries have a limited number of charge and discharge cycles. As the usage time increases, their energy storage capacity will gradually decrease, thereby shortening the service life of the device.

[0005] Furthermore, lithium batteries have the risk of overheating, fire, or even explosion, especially in the case of overcharging or physical damage. These safety issues not only pose a direct threat to users, but also pose significant legal and financial risks to manufacturers. The performance of lithium batteries will significantly decrease under certain temperature conditions. For example, in a low temperature environment, the energy release capacity of lithium batteries will be greatly reduced; in a high temperature environment, the chemical stability of lithium batteries will be reduced, increasing safety risks.

[0006] Therefore, there is an urgent need to provide a human-machine interface device using a supercapacitor, which can not only avoid the disadvantages caused by using lithium batteries, but also improve the charging efficiency and save precious time. Utility Model Content

[0007] One of the purposes of the present invention is to provide a human-machine interface device using a supercapacitor, which replaces the conventional lithium battery with a supercapacitor, on the one hand avoiding the pollution problem caused by the use of lithium batteries, and on the other hand improving the charging efficiency and saving precious time by using the supercapacitor.

[0008] In order to achieve the above-mentioned purpose, in a specific embodiment, the present invention provides a human-machine interface device using a supercapacitor, including a power circuit and a main control module, the power circuit includes a control unit and a fast charging unit, and the power circuit can be removably connected to an external DC power supply, the control unit is used to charge the supercapacitor configured in the human-machine interface device, the fast charging unit is electrically connected to the control unit, and is used to provide a certain charging current to the supercapacitor, the main control module is electrically connected to the power circuit and the supercapacitor, and the main control module is used to monitor the capacitor voltage of the supercapacitor and drive to continue charging or stop charging.

[0009] Preferably, the control unit is further configured to drive the human-machine interface device to be powered by one of the external DC power supply or the super capacitor.

[0010] Preferably, it further includes:

[0011] A voltage regulator, electrically connected to the power circuit and the main control module, configured to:

[0012] When the power circuit is connected to the external DC power supply, the power supplied by the external DC power supply is stabilized to a first power supply voltage and transmitted to the main control module; or

[0013] When the power circuit is separated from the external DC power supply, the power supplied by the super capacitor is stabilized to the first power voltage and transmitted to the main control module.

[0014] Preferably, it further includes:

[0015] a display light; and

[0016] A buck-boost circuit configured to provide power to the display light, wherein the buck-boost circuit is electrically connected to the power circuit and the main control module and is configured to:

[0017] When receiving an enable signal sent by the main control module, the power supplied by the power circuit is stabilized to a second power voltage and sent to the display light; or

[0018] When receiving a disable signal sent by the main control module, the operation stops.

[0019] Preferably, the fast charging unit comprises:

[0020] A reference resistor for configuring the current value of the fixed charging current;

[0021] a boost inductor, one end of which is electrically connected to the reference resistor and configured to configure a charging voltage across two ends of the reference resistor;

[0022] a boost switching circuit configured to receive a control signal from the control unit at a signal input terminal and output a boost signal to the boost inductor at a signal output terminal;

[0023] an oscillator electrically connected to the boost switching circuit through a flip-flop and configured to provide a boost cycle signal to control the boost signal of the boost switching circuit, wherein the flip-flop is configured to drive the boost cycle signal to be transmitted to the boost switching circuit; and

[0024] A checking circuit is electrically connected to the two terminals of the reference resistor and is configured to turn on the flip-flop when the charging voltage does not reach a preset value, or to turn off the flip-flop when the charging voltage reaches the preset value.

[0025] In summary, the human-machine interface device using supercapacitors of the present invention replaces conventional lithium batteries with supercapacitors, which, on the one hand, avoids the pollution problem caused by using lithium batteries, and on the other hand, can improve the charging efficiency and save precious time by using supercapacitors.

[0026] For further description and advantages of the present invention, please refer to the following drawings and embodiments to more clearly understand the technical solutions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above-mentioned objects and advantages of the present invention will become more easily understood by those having ordinary knowledge in the technical field after referring to the following detailed description and the accompanying drawings.

[0028] Figure 1 This is a circuit diagram of a human-machine interface device using a supercapacitor according to a specific embodiment of the present invention;

[0029] Figure 2 It is a circuit diagram of a power circuit of a human-machine interface device using a supercapacitor according to a specific embodiment of the utility model;

[0030] Explanation of symbols:

[0031] 10. Human-machine interface device; 110. Power supply circuit;

[0032] 111. control unit; 112. fast charging unit;

[0033] 1121, reference resistor; 1121a, endpoint;

[0034] 1121b, endpoint; 1122, boost inductor;

[0035] 1123, boost switching circuit; 1123a, signal input terminal;

[0036] 1123b, signal output terminal; 1124, oscillator;

[0037] 1125, flip-flop; 1126, storage capacitor;

[0038] 1127. Check the circuit; 120. Main control module;

[0039] 130. Voltage stabilizer; 140. Display light;

[0040] 150. Buck-boost circuit; 160. Transmission line;

[0041] 20. Supercapacitor; 30. External DC power supply;

[0042] 301-S302, S3011-S3012, steps. DETAILED DESCRIPTION

[0043] Please read the following detailed description with reference to the drawings of the present disclosure, wherein the drawings of the present invention are used in an illustrative manner to introduce various different embodiments of the present invention and to provide an understanding of how to implement the present invention. The embodiments of the present invention provide sufficient content for those skilled in the art to implement the embodiments disclosed by the present invention, or to implement embodiments derived from the contents disclosed by the present invention. It should be noted that the embodiments are not mutually exclusive, and some embodiments can be appropriately combined with one or more other embodiments to form new embodiments, that is, the implementation of the present invention is not limited to the embodiments disclosed below. In addition, for the sake of simplicity and clarity of illustration, the relevant details will not be excessively disclosed in each embodiment. Even if specific details are disclosed, they are only exemplified to make the reader understand, and the relevant specific details in each embodiment are not intended to limit the disclosure of this case.

[0044] See also Figure 1 , which is a circuit diagram of a human-machine interface device using a supercapacitor according to a specific embodiment of the present invention. Figure 1In the present invention, the human-machine interface device 10 is mainly powered by the supercapacitor 20. The human-machine interface device 10 can be a keyboard, a mouse, a trackball, a touchpad, a pointing stick, a light pen, a handwriting board, a game controller, etc., which are interface devices for users to input data into a computer. In a specific embodiment, the human-machine interface device 10 mainly includes a power circuit 110 and a main control module 120. The power circuit 110 is removably connected to an external DC power supply 30, and is configured to determine whether to immediately provide a constant charging current to charge the supercapacitor 20. The main control module 120 is electrically connected to the power circuit 110 and the supercapacitor 20, and the main control module 120 is configured to monitor the capacitor voltage of the supercapacitor 20 and determine whether to continue charging or stop charging the supercapacitor 20. In a specific embodiment, the power circuit 110 includes a control unit 111 and a fast charging unit 112. The control unit 111 is detachably connected to the external DC power supply 30 and is configured to receive a charging enable signal / charging disable signal from the main control module 120 to determine whether to charge the supercapacitor 20. The fast charging unit 112 is electrically connected to the control unit 111 and is configured to provide a constant charging current to the supercapacitor 20 immediately after receiving the charging signal sent by the control unit 111.

[0045] In actual application, for example, when the fast charging unit 112 receives a charging signal from the control unit 111 notifying that charging is possible, the fast charging unit 112 will start the fast charging mechanism. When the fast charging unit 112 starts fast charging, it will first determine whether the temperature, current, and voltage exceed the preset values. If they are all within the preset range, it will immediately charge with a fixed charging current.

[0046] In one embodiment, the control unit 111 is configured to further determine whether the human-machine interface device 10 is powered by the external DC power supply 30 or the super capacitor 20. In one embodiment, the human-machine interface device 10 further includes a voltage regulator 130, which is electrically connected to the power circuit 110 and the main control module 120. When the power circuit 110 is connected to the external DC power supply 30, the voltage regulator 130 stabilizes the power supplied by the external DC power supply 30 to a first power supply voltage, and transmits it to the main control module 120 to serve as a system DC power supply of the main control module 120. When the power circuit 110 is separated from the external DC power supply 30, the voltage regulator 130 stabilizes the power supplied by the super capacitor 20 to a first power supply voltage, and transmits it to the main control module 120. In one embodiment, the first power supply voltage may be 2.2V.

[0047] In actual applications, for example, if the supercapacitor 20 or the external DC power supply 30 can provide stable power, the power circuit 110 will output power between 2.5V and 3.8V to supply the human-machine interface device 10. On the contrary, if the supercapacitor 20 or the external DC power supply 30 cannot supply sufficient power (for example, when the capacitor voltage of the supercapacitor 20 is less than 2.5V), the power circuit 110 will send a power-off signal to the human-machine interface device 10, and the human-machine interface device 10 will cut off all power and enter the standby mode to protect the supercapacitor 20 from being over-discharged and causing a reduction in life.

[0048] In one embodiment, the human-machine interface device 10 further includes a buck-boost circuit 150 and a display light 140. The buck-boost circuit 150 is electrically connected to the power circuit 110 and the main control module 120. When the buck-boost circuit 150 receives an enable signal sent by the main control module 120, the power supplied by the power circuit 110 (e.g., between 2.5V and 3.8V) is stabilized to a second power voltage and transmitted to the display light 140. When the buck-boost circuit 150 receives an enable signal sent by the main control module 120, the power supplied by the power circuit 110 is stabilized to a second power voltage and transmitted to the display light 140. When the buck-boost circuit 150 receives a disable signal sent by the main control module 120, the buck-boost circuit 150 stops operating. In one embodiment, the second power voltage may be 3.3V. In a specific embodiment, the display light 140 can be used to remind the user when the user turns on the power, performs Bluetooth pairing, the super capacitor 20 is insufficiently supplied, or the display input is in uppercase mode.

[0049] Figure 2 FIG. 1 is a schematic diagram of a power circuit of a human-machine interface device using a supercapacitor according to an embodiment of the present invention. Figure 2In the embodiment, the power circuit 110 includes a control unit 111 and a fast charging unit 112. The fast charging unit 112 includes a reference resistor 1121, a boost inductor 1122, a boost switching circuit 1123, an oscillator 1124, a flip-flop 1125, a storage capacitor 1126, and a check circuit 1127. One end of the boost inductor 1122 is electrically connected to the reference resistor 1121, and is configured to determine a charging voltage between two terminals 1121a and 1121b across the reference resistor 1121. The boost switching circuit 1123 is configured to receive a control signal from the control unit 111 at a signal input terminal 1123a, and output a boost signal to the boost inductor 1122 at a signal output terminal 1123b. The oscillator 1124 is electrically connected to the boost switching circuit 1123 through the flip-flop 1125, and is configured to provide a boost cycle signal to control the boost signal of the boost switching circuit 1123. The flip-flop 1125 is configured to determine whether to transmit the boost cycle signal to the boost switching circuit 1123. The check circuit 1127 is electrically connected to the two terminals 1121a and 1121b of the reference resistor 1121, and is configured to turn on the flip-flop 1125 when the charging voltage does not reach the preset value, or turn off the flip-flop 1125 when the charging voltage reaches the preset value.

[0050] In one embodiment, the reference resistor 1121 is configured to determine the current value of the constant charging current. In other words, the change of the resistance value of the reference resistor 1121 can change the current value of the constant charging current. For example, in one embodiment, the current value of the constant charging current can be set to 25C. In actual operation, after the current value of the constant charging current is set, the oscillator 1124 will turn on and provide a boost cycle signal, so that the boost switching circuit 1123 introduces the input voltage at the signal input terminal 1123a, allowing the boost inductor 1122 and the storage capacitor 1126 connected to the signal output terminal 1123b to assist in the boost operation. The charging current of the supercapacitor 20 is the current flowing through the reference resistor 1121, that is, the charging voltage difference between the terminals 1121a and 1121a of the reference resistor 1121 divided by the resistance value R of the reference resistor 1121. In one embodiment, the frequency of the boost cycle signal provided by the oscillator 1124 is between 600Khz and 900Khz.

[0051] When the charging current of the fast charging unit 112 to the super capacitor 20 is lower than the preset value, the boost switching circuit 1123 will continue to boost the voltage to increase the current; when the charging current of the fast charging unit 112 exceeds the preset value, the boost switching circuit 1123 will stop working so that the charging current does not exceed the preset value. This repeated feedback action will continue to operate before the super capacitor 20 is fully charged.

[0052] During the charging process, the main control module 120 continuously monitors the voltage of the super capacitor 20. When the voltage of the terminal 1121a reaches the maximum voltage of the super capacitor 20, the main control module 120 will Figure 1 The transmission line 160 in the power circuit 110 transmits a disable signal to notify the fast charging unit 112 in the power circuit 110 to stop operating.

[0053] In the present invention, supercapacitors are used to replace conventional chemical batteries such as lithium batteries as the power source of the human-machine interface device. Unlike conventional chemical batteries, which require a trickle charging circuit design when charging, the present invention uses supercapacitors as the power source of the human-machine interface device to achieve the function of fast charging, and its charging speed is 25 times faster than that of traditional charging circuits. In this way, it only takes 3 minutes to fast charge from 0 to 100%, which means that the human-machine interface device can be used for more than 2 months.

[0054] From the above discussion, it can be seen that the human-machine interface device using supercapacitors of the present invention can replace conventional lithium batteries with supercapacitors, which can avoid the pollution problem caused by using lithium batteries on the one hand, and on the other hand, the use of supercapacitors can improve the charging efficiency and save precious time.

[0055] Although the present invention is disclosed as above by the above-mentioned several implementation modes or embodiments, they are not used to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. A human-machine interface device using a supercapacitor, characterized in that: include: A power circuit, removably connected to an external DC power supply, comprising: a control unit for charging a supercapacitor disposed in the human-machine interface device; a fast charging unit electrically connected to the control unit for providing a certain charging current to the supercapacitor; and A main control module is electrically connected to the power circuit and the super capacitor, and the main control module is used to monitor the capacitor voltage of the super capacitor and drive the super capacitor to continue charging or stop charging.

2. The human-machine interface device according to claim 1, wherein: The control unit is further configured to drive the human-machine interface device to be powered by the external DC power supply or the supercapacitor.

3. The human-machine interface device using a supercapacitor according to claim 1, characterized in that: Also includes: a voltage regulator, electrically connected to the power circuit and the main control module, configured to: When the power circuit is connected to the external DC power supply, the power supplied by the external DC power supply is stabilized to a first power voltage and transmitted to the main control module; or When the power circuit is separated from the external DC power supply, the power supplied by the super capacitor is stabilized to the first power voltage and transmitted to the main control module.

4. The human-machine interface device according to claim 3, wherein: Also includes: a display light; and A buck-boost circuit configured to provide power to the display light, wherein the buck-boost circuit is electrically connected to the power circuit and the main control module and configured to: Upon receiving an enable signal from the main control module, the power supplied by the power circuit is stabilized to a second power voltage and transmitted to the display light; or When receiving a disable signal sent by the main control module, the operation stops.

5. The human-machine interface device according to claim 1, wherein: The fast charging unit includes: A reference resistor for configuring the current value of the constant charging current; a boost inductor, one end of which is electrically connected to the reference resistor and configured to configure a charging voltage across two terminals of the reference resistor; a boost switching circuit configured to receive a control signal from the control unit at a signal input terminal and output a boost signal to the boost inductor at a signal output terminal; an oscillator electrically connected to the boost switching circuit through a flip-flop and configured to provide a boost cycle signal to control the boost signal of the boost switching circuit, wherein the flip-flop is configured to drive the boost cycle signal to be transmitted to the boost switching circuit; and A checking circuit is electrically connected to the two terminals of the reference resistor and configured to turn on the flip-flop when the charging voltage does not reach a preset value, or to turn off the flip-flop when the charging voltage reaches the preset value.

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