Electrostatic detection device and electronic equipment

Abstract

The utility model discloses an electrostatic detection device and electronic equipment, and the device comprises a coil which is configured to sense static electricity and generate induced voltage; the first input end of the detection circuit is connected with one end of the coil, the second input end of the detection circuit is connected with the other end of the coil, and the detection circuit is configured to generate an electrostatic detection signal based on the induction voltage. According to the static electricity detection device, when static electricity hits the coil, the coil can generate induced voltage, the detection circuit can generate static electricity detection signals according to the induced voltage, and therefore effective static electricity detection can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of static electricity detection, in particular to a static electricity detection device and an electronic device. Background Art

[0002] To obtain certification, electronic products must undergo EMC (Electromagnetic Compatibility) testing, one of which is the ESD (Electro-Static discharge) test, which is crucial. The impact of static electricity does not only come from testing. The human body also generates static electricity in daily life. When the human body comes into contact with electronic products, static electricity is also released and affects the product. Most products rely on grounding, shielding or shell insulation to deal with static electricity, but when the grounding is not good or the screen is invalid, the impact of static electricity is obvious, and the electronic device will freeze or restart, or even be damaged. In related technologies, there is no static electricity detection device in electronic equipment, and it is impossible to effectively detect static electricity. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first purpose of the utility model is to provide a static electricity detection device, when static electricity hits the coil, the coil can generate an induced voltage, and the detection circuit can generate a static electricity detection signal according to the induced voltage, so as to achieve effective detection of static electricity.

[0004] The second objective of the present invention is to provide an electronic device.

[0005] To achieve the above-mentioned purpose, the first aspect of the utility model proposes an electrostatic detection device, which includes: a coil, configured to induce static electricity and generate an induced voltage; a detection circuit, wherein a first input terminal of the detection circuit is connected to one end of the coil, and a second input terminal of the detection circuit is connected to the other end of the coil, and is configured to generate an electrostatic detection signal based on the induced voltage.

[0006] According to the static electricity detection device of the embodiment of the utility model, when static electricity hits the coil, the coil can generate an induced voltage, and the detection circuit can generate a static electricity detection signal according to the induced voltage. Therefore, the device can effectively detect static electricity.

[0007] In addition, the electrostatic detection device according to the above embodiment of the utility model may also have the following additional technical features:

[0008] Specifically, the coil is formed by winding a wire and the surface of the wire is not insulated, or the coil is formed by a wire wound on a PCB (Printed Circuit Board).

[0009] Specifically, the detection circuit includes: a rectifier circuit, wherein a first input terminal of the rectifier circuit is connected to one end of the coil, and a second input terminal of the rectifier circuit is connected to the other end of the coil, and is configured to rectify the induced voltage to obtain a DC voltage; a comparison circuit, wherein a first input terminal of the comparison circuit is connected to a first output terminal of the rectifier circuit, and a second input terminal of the comparison circuit is connected to a second output terminal of the rectifier circuit, and is configured to compare the DC voltage with a preset reference voltage and output a comparison signal; a switch circuit, wherein an input terminal of the switch circuit is connected to an output terminal of the comparison circuit, and is configured to generate the electrostatic detection signal based on the comparison signal.

[0010] Specifically, the detection circuit also includes: a voltage stabilizing circuit, which is arranged between the first output terminal and the second output terminal of the rectifier circuit and is configured to stabilize the DC voltage so that the DC voltage is within a safe voltage range.

[0011] Specifically, the comparison circuit includes: a voltage divider circuit, which is respectively connected to a first preset power supply and a second output end of the rectifier circuit, and is configured to divide a preset voltage provided by the first preset power supply to obtain the preset reference voltage; a comparator, wherein a first input end of the comparator is connected to a first output end of the rectifier circuit, a second input end of the comparator is connected to an output end of the voltage divider circuit, and an output end of the comparator is connected to the switch circuit, and is configured to compare the DC voltage with the preset reference voltage and output the comparison signal.

[0012] Specifically, the switching circuit includes: a first resistor, one end of which is connected to a second preset power supply; a first switching tube, a first end of which is connected to an output end of the comparison circuit, a second end of which is connected to the other end of the first resistor and serves as an output end of the switching circuit to output the electrostatic detection signal, and a third end of the first switching tube is grounded.

[0013] Specifically, the detection circuit further includes: an output circuit, which is connected to the switch circuit and is configured to filter and output the electrostatic detection signal.

[0014] Specifically, the detection circuit further includes: a filter circuit, which is provided between the coil and the rectifier circuit and is configured to perform filtering processing on the induced voltage.

[0015] To achieve the above-mentioned purpose, a second aspect of the present invention provides an electronic device, comprising: the above-mentioned static electricity detection device, which is configured to perform static electricity detection on the electronic device and output a static electricity detection signal.

[0016] According to the electronic device of the embodiment of the utility model, through the above-mentioned static electricity detection device, it is possible to output a static electricity detection signal to the electronic device when static electricity is released to the electronic device, thereby achieving effective detection of static electricity.

[0017] Specifically, the device also includes: a display screen; a controller, which is connected to the electrostatic detection device and the display screen respectively, and is configured to control the electronic device based on the electrostatic detection signal to refresh the display screen and / or issue an alarm reminder.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a block diagram of an electrostatic detection device according to an embodiment of the utility model;

[0020] Figure 2 A hardware topology diagram of an electrostatic detection device according to an embodiment of the utility model;

[0021] Figure 3 It is a block diagram of an electronic device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The static electricity detection device and the electronic device provided in the embodiments of the present utility model are described below with reference to the accompanying drawings.

[0024] Figure 1 Schematic diagram of a block diagram of an electrostatic detection device according to an embodiment of the present invention.

[0025] like Figure 1 As shown, the static electricity detection device 100 according to the embodiment of the present invention may include: a coil L1 and a detection circuit 110 .

[0026] The coil L1 is configured to induce static electricity and generate an induced voltage. The first input terminal of the detection circuit 110 is connected to one end of the coil L1, and the second input terminal of the detection circuit 110 is connected to the other end of the coil L1, and is configured to generate a static electricity detection signal based on the induced voltage.

[0027] Specifically, when static electricity hits the coil L1, the coil L1 can sense the static electricity and generate an induced voltage. After the detection circuit 110 receives the induced voltage generated by the coil L1, it processes the induced voltage and generates a static electricity detection signal.

[0028] According to an embodiment of the present invention, the coil L1 is formed by winding a wire and the surface of the wire is not insulated, or the coil L1 is formed by a wire wound on a PCB board.

[0029] That is, a relatively thin wire can be wound into a coil L1 and arranged on the inner shell of the product, and the wire ends can be led out from the middle and the outside to the detection circuit 110; or a copper foil can be wound into a coil L1 on a PCB board, and the two ends of the coil L1 are respectively connected to the first input end and the second input end of the detection circuit 110. The coil L1 can be round, square, oval, etc.

[0030] According to one embodiment of the utility model, Figure 2 As shown, the detection circuit 110 includes: a rectifier circuit 111, wherein the first input end of the rectifier circuit 111 is connected to one end of the coil L1, and the second input end of the rectifier circuit 111 is connected to the other end of the coil L1, and is configured to rectify the induced voltage to obtain a DC voltage; a comparison circuit 112, wherein the first input end of the comparison circuit 112 is connected to the first output end of the rectifier circuit 111, and the second input end of the comparison circuit 112 is connected to the second output end of the rectifier circuit 111, and is configured to compare the DC voltage with a preset reference voltage and output a comparison signal; and a switch circuit 113, wherein the input end of the switch circuit 113 is connected to the output end of the comparison circuit 112, and is configured to generate an electrostatic detection signal based on the comparison signal. The preset reference voltage can be calibrated according to actual conditions.

[0031] Specifically, when static electricity hits the coil L1, the coil L1 can sense static electricity and generate an induced voltage. After receiving the induced voltage, the rectifier circuit 111 rectifies the fluctuating induced voltage, thereby obtaining a DC voltage, and transmits the DC voltage to the comparison circuit 112 through the first output terminal of the rectifier circuit 111. After receiving the DC voltage, the comparison circuit 112 compares the DC voltage with a preset reference voltage, and outputs a comparison signal to the switch circuit 113. The switch circuit 113 can generate an electrostatic detection signal based on the comparison signal. It should be understood that when there is no static electricity, the coil L1 will not generate an induced voltage, and the comparison circuit 112 will not generate a comparison signal.

[0032] In one embodiment of the present invention, Figure 2 As shown, the rectifier circuit 111 includes: a first rectifier diode D1 to a fourth rectifier diode D4, the cathode of the first rectifier diode D1 is respectively connected to the cathode of the third rectifier diode D3 and the first input terminal of the comparison circuit 112, the anode of the first rectifier diode D1 is respectively connected to the cathode of the second rectifier diode D2 and one end of the coil L1, the anode of the second rectifier diode D2 is respectively connected to the anode of the fourth rectifier diode D4 and the second input terminal of the comparison circuit 112 and then grounded, and the anode of the third rectifier diode D3 is respectively connected to the cathode of the fourth rectifier diode D4 and the other end of the coil L1.

[0033] According to one embodiment of the utility model, Figure 2 As shown, the detection circuit 110 also includes: a voltage stabilizing circuit 114, which is arranged between the first output terminal and the second output terminal of the rectifier circuit 111 and is configured to stabilize the DC voltage so that the DC voltage is within a safe voltage range.

[0034] Furthermore, if Figure 2 As shown, the voltage stabilizing circuit 114 includes a voltage stabilizing tube DZ1 , a cathode of the voltage stabilizing tube DZ1 is connected to a first output end of the rectifier circuit 111 , and an anode of the voltage stabilizing tube DZ1 is connected to a second output end of the rectifier circuit 111 .

[0035] Specifically, the induced voltage is rectified by the first rectifier diode D1, the second rectifier diode D2, the third rectifier diode D3 and the fourth rectifier diode D4 to obtain a DC voltage, and the DC voltage is then stabilized by the voltage regulator DZ1, which clamps the DC voltage within a safe voltage range.

[0036] According to one embodiment of the utility model, Figure 2 As shown, the comparison circuit 112 includes: a voltage divider circuit 1121, which is connected to the first preset power supply VCC1 and the second output terminal of the rectifier circuit 111 respectively, and is configured to divide the preset voltage provided by the first preset power supply VCC1 to obtain a preset reference voltage; a comparator M1, wherein the first input terminal of the comparator M1 is connected to the first output terminal of the rectifier circuit 111, the second input terminal of the comparator M1 is connected to the output terminal of the voltage divider circuit 1121, and the output terminal of the comparator M1 is connected to the switch circuit 113, and is configured to compare the DC voltage with the preset reference voltage and output a comparison signal. The preset voltage provided by the first preset power supply VCC1 can be calibrated according to actual conditions, for example, the preset voltage can be 3.3V.

[0037] Specifically, the second input terminal of the comparator M1 is provided with a preset reference voltage of a positive voltage by the voltage divider circuit 1121, and the first input terminal of the comparator M1 is connected to the DC voltage output by the rectifier circuit 111. When there is no static electricity, there is no DC voltage, and the voltage at the first input terminal of the comparator M1 is close to 0V, which is less than the preset reference voltage, and the comparator M1 outputs a low-level signal; when static electricity hits the coil L1, the induced voltage generated on the coil L1 passes through the rectifier circuit 111 to obtain a DC voltage. When the DC voltage is greater than the preset reference voltage, the comparator M1 outputs a high-level signal, i.e., a comparison signal. The switch circuit 113 can generate an electrostatic detection signal according to the comparison signal.

[0038] Furthermore, if Figure 2 As shown, the voltage divider circuit 1121 includes a second resistor R2 and a third resistor R3, one end of the second resistor R2 is connected to the first preset power supply VCC1, the other end of the second resistor R2 is connected to one end of the third resistor R3, and has a first node, the other end of one end of the third resistor R3 is connected to the second output end of the rectifier circuit 111, and the first node serves as the output end of the voltage divider circuit 1121.

[0039] According to one embodiment of the utility model, Figure 2 As shown, the switch circuit 113 includes: a first resistor R1, one end of the first resistor R1 is connected to the second preset power supply VCC2; a first switch tube Q1, a first end of the first switch tube Q1 is connected to the output end of the comparison circuit 112, a second end of the first switch tube Q1 is connected to the other end of the first resistor R1 and serves as the output end of the switch circuit 113 to output the electrostatic detection signal, and a third end of the first switch tube Q1 is grounded. The first switch tube Q1 can be an N-type MOS tube or an NPN-type triode.

[0040] Specifically, when there is no static electricity, the comparison circuit 112 outputs a low level, and the output voltage of the switch circuit 113 is high, close to the voltage of the second preset power supply VCC2. When static electricity hits the coil L1, the comparison circuit 112 outputs a high-level comparison signal to the first end of the first switch tube Q1, the first switch tube Q1 is turned on, and the output voltage of the switch circuit 113 is pulled down to 0V, thereby outputting a low-level static electricity detection signal.

[0041] According to one embodiment of the utility model, Figure 2 As shown, the detection circuit 110 further includes: an output circuit 115 , which is connected to the switch circuit 113 and is configured to filter and output the static electricity detection signal.

[0042] That is to say, the output circuit 115 can filter the static electricity detection signal output by the switch circuit 113 and output the signal after filtering out interference signals in the signal, thereby improving the accuracy of the static electricity detection signal.

[0043] In one embodiment of the present invention, Figure 2 As shown, the output circuit 115 includes: a fourth resistor R4, a fifth resistor R5 and a first capacitor C1, one end of the fourth resistor R4 is connected to the output end of the switch circuit 113, the other end of the fourth resistor R4 is respectively connected to one end of the fifth resistor R5 and one end of the first capacitor C1, the other end of the first capacitor C1 is grounded, and the other end of the fifth resistor R5 serves as the output end of the output circuit 115.

[0044] According to one embodiment of the utility model, Figure 2 As shown, the detection circuit 110 further includes: a filter circuit 116 , which is disposed between the coil L1 and the rectifier circuit 111 and is configured to filter the induced voltage.

[0045] In one embodiment of the present invention, Figure 2 As shown, the filter circuit 116 includes: a second capacitor C2, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, one end of the second capacitor C2 is respectively connected to one end of the coil L1 and one end of the sixth resistor R6, the other end of the second capacitor C2 is respectively connected to the other end of the coil L1 and one end of the seventh resistor R7, one end of the eighth resistor R8 is respectively connected to the other end of the sixth resistor R6 and the first input end of the rectifier circuit 111, and the other end of the eighth resistor R8 is respectively connected to the other end of the seventh resistor R7 and the second input end of the rectifier circuit 111. The filter circuit 116 can filter the induced voltage to remove high-frequency pulse interference.

[0046] In summary, according to the static electricity detection device of the embodiment of the utility model, when static electricity hits the coil, the coil can generate an induced voltage, and the detection circuit can generate a static electricity detection signal according to the induced voltage. Therefore, the device can effectively detect static electricity.

[0047] Corresponding to the above embodiment, the utility model also provides an electronic device.

[0048] Figure 3 It is a block diagram of an electronic device according to an embodiment of the utility model.

[0049] like Figure 3 As shown, the electronic device 200 of the embodiment of the present invention comprises: the above-mentioned static electricity detection device 100, which is configured to perform static electricity detection on the electronic device 200 and output a static electricity detection signal.

[0050] That is, when static electricity is released to the electronic device 200 , the static electricity detection device 100 can detect the static electricity and output a static electricity detection signal to the electronic device 200 .

[0051] According to one embodiment of the utility model, Figure 3 As shown, the above-mentioned electronic device 200 also includes: a display screen 210; a controller 220, the controller 220 is respectively connected to the electrostatic detection device 100 and the display screen 210, and is configured to control the electronic device 200 based on the electrostatic detection signal to refresh the display screen 210 and / or issue an alarm reminder.

[0052] Specifically, when static electricity is released to the electronic device 200, the static electricity detection device 100 can detect the static electricity and output a static electricity detection signal to the controller 220. The controller 220 can control the display screen 210 to refresh according to the static electricity detection signal, thereby preventing display function abnormalities caused by screen distortion or freezes; or control the display screen 210 to issue an alarm reminder to remind the user; or control the display screen 210 to refresh and issue an alarm reminder at the same time.

[0053] In summary, the electronic device according to the embodiment of the present utility model can output a static electricity detection signal to the electronic device when static electricity is released to the electronic device through the static electricity detection device, thereby achieving effective detection of static electricity.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An electrostatic detection device, characterized in that: The device comprises: a coil configured to induce static electricity and generate an induced voltage; a detection circuit, wherein a first input terminal of the detection circuit is connected to one end of the coil, a second input terminal of the detection circuit is connected to the other end of the coil, and is configured to generate an electrostatic detection signal based on the induced voltage; The detection circuit includes: a rectifier circuit, wherein a first input terminal of the rectifier circuit is connected to one end of the coil, a second input terminal of the rectifier circuit is connected to the other end of the coil, and the rectifier circuit is configured to rectify the induced voltage to obtain a DC voltage; a comparison circuit, wherein a first input terminal of the comparison circuit is connected to a first output terminal of the rectifier circuit, a second input terminal of the comparison circuit is connected to a second output terminal of the rectifier circuit, and the comparison circuit is configured to compare the DC voltage with a preset reference voltage and output a comparison signal; and a switch circuit, wherein an input terminal of the switch circuit is connected to an output terminal of the comparison circuit, and the switch circuit is configured to generate the electrostatic detection signal based on the comparison signal.

2. The device according to claim 1, characterized in that The coil is formed by winding a wire and the surface of the wire is not insulated, or the coil is formed by a wire wound on a PCB board.

3. The device according to claim 1, characterized in that The detection circuit also includes: A voltage stabilizing circuit is provided between the first output terminal and the second output terminal of the rectifier circuit and is configured to stabilize the DC voltage so that the DC voltage is within a safe voltage range.

4. The device according to claim 1, characterized in that The comparison circuit comprises: a voltage divider circuit, the voltage divider circuit being connected to the first preset power supply and the second output terminal of the rectifier circuit respectively, and being configured to divide the preset voltage provided by the first preset power supply to obtain the preset reference voltage; A comparator, wherein the first input terminal of the comparator is connected to the first output terminal of the rectifier circuit, the second input terminal of the comparator is connected to the output terminal of the voltage divider circuit, and the output terminal of the comparator is connected to the switch circuit, and is configured to compare the DC voltage with the preset reference voltage and output the comparison signal.

5. The device according to claim 1, characterized in that The switch circuit comprises: a first resistor, one end of which is connected to a second preset power source; A first switch tube, wherein a first end of the first switch tube is connected to an output end of the comparison circuit, a second end of the first switch tube is connected to the other end of the first resistor and serves as an output end of the switch circuit to output the electrostatic detection signal, and a third end of the first switch tube is grounded.

6. The device according to claim 1, characterized in that The detection circuit further includes: an output circuit, which is connected to the switch circuit and is configured to filter and output the static electricity detection signal.

7. The device according to claim 1, characterized in that The detection circuit further includes: a filter circuit, which is disposed between the coil and the rectifier circuit and is configured to perform filtering processing on the induced voltage.

8. An electronic device, characterized in that: include: The electrostatic detection device according to any one of claims 1 to 7 is configured to perform electrostatic detection on the electronic device and output an electrostatic detection signal.

9. The electronic device according to claim 8, characterized in that: The device also includes: Display screen; A controller is connected to the electrostatic detection device and the display screen respectively, and is configured to control the electronic device based on the electrostatic detection signal to refresh the display screen and / or issue an alarm reminder.

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