CN213426160U - Single-wire communication conversion circuit, single-wire communication device and equipment - Google Patents
Single-wire communication conversion circuit, single-wire communication device and equipment Download PDFInfo
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- CN213426160U CN213426160U CN202021979467.2U CN202021979467U CN213426160U CN 213426160 U CN213426160 U CN 213426160U CN 202021979467 U CN202021979467 U CN 202021979467U CN 213426160 U CN213426160 U CN 213426160U
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Abstract
The utility model discloses a single line communication converting circuit, single line communication device and equipment, include: the data transmission module is connected with the antistatic interference module, the data receiving module is connected with the antistatic interference module, and the data transmission module and the data receiving module are respectively connected with a receiving and transmitting port through the same single line; in the data transmission process, the data sending module and the data receiving module are in different on-off states; the data sending module is used for sending data to a receiving and sending port through a pulse signal of amplified voltage; the antistatic interference module is used for absorbing static electricity and preventing the static electricity from damaging products; the data receiving module is used for receiving the data transmitted from the receiving and sending port. The utility model discloses can realize reducing space and occupy, reduce cost, and improve the anti-static interference ability of circuit greatly.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to single line communication converting circuit, single line communication device and equipment.
Background
The traditional communication conversion circuit adopts a bidirectional communication conversion circuit, when the capacitance on a transmission line is larger, the rising edge of a waveform is obviously slowed down, and when the transmission line is longer and the impedance of a receiving end is not matched with the impedance of the transmission line, the oscillation phenomenon is generated on the rising edge and the falling edge of the waveform; when other pulse signals are superimposed on the rectangular pulse signal through distributed capacitance between the wires or a common power supply line, additional noise appears on the signal. And two traditional communication module connection (for example, display panel and control panel) adopt the double-line transmission, occupation space is big, with high costs, and the product is antistatic interference effect is poor.
Disclosure of Invention
The utility model discloses to the proposition of above problem, and provide one kind and can save the cost, reduce the space and occupy and single line communication converting circuit, single line communication device and the equipment that the interference killing feature is strong.
The utility model discloses a technical means be: a single-wire communication conversion circuit is provided, including: the data transmission module is connected with the antistatic interference module, the data receiving module is connected with the antistatic interference module, the data transmission module and the data receiving module are respectively connected with a receiving and transmitting port through the same single line, and the data transmission module and the data receiving module are in different on-off states in the data transmission process;
the data sending module is used for sending data to the receiving and sending port through a pulse signal with increased voltage;
the antistatic interference module is used for absorbing static electricity and preventing the static electricity from damaging products;
the data receiving module is used for receiving the data transmitted from the receiving and sending port.
The utility model discloses another technical means who adopts is: there is provided a single wire communication device including:
the first communication module and the second communication module are communicated through a single wire, the first communication module comprises the single wire communication conversion circuit, and the second communication module comprises the single wire communication conversion circuit.
The utility model discloses another technical means who adopts is: providing an apparatus comprising: the single-wire communication device.
Since the technical scheme is used, the utility model provides a single line communication converting circuit, single line communication device and equipment is owing to adopt that the single line is transmitted, and line length quantity is few, and the space volume occupies for a short time, is favorable to reducing the cost, and has the antistatic interference module in the circuit, has improved the antistatic interference ability of circuit greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is a block diagram of a single-wire communication conversion circuit according to an embodiment;
FIG. 2 is a block diagram of a single-wire communication conversion circuit according to an embodiment;
FIG. 3 is a schematic diagram of a single-wire communication conversion circuit in one embodiment.
In the figure: 10. the device comprises a data sending module 20, an anti-electrostatic interference module 30, a data receiving module 102, a switching unit 104, a current limiting unit 202, a filtering unit 204, a clamping unit 302, a waveform modulating unit 304 and a voltage dividing unit.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and not limitation. In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
As shown in fig. 1, the utility model provides a single line communication converting circuit, include: the data transmission module 10 is connected with the antistatic interference module 20, the data receiving module 30 is connected with the antistatic interference module 20, the data transmission module 10 and the data receiving module 30 are respectively connected with a receiving and transmitting port BI through the same single wire, and the data transmission module and the data receiving module are in different on-off states in the data transmission process;
the data transmitting module 10 is connected to the data transmitting interface IN, and is configured to receive data from the data transmitting interface IN and transmit the data to the receiving and transmitting port BI through a pulse signal of an amplified voltage. Because the initial voltage is generally low, for example, a voltage of 3.3V is generally selected, in order to improve the anti-interference capability, the voltage may be amplified, for example, to 5V, and data is transmitted by a 5V pulse signal, and the anti-interference capability of 5V pulse transmission is much better than that of 3.3V pulse transmission.
The anti-static interference module 20 is used for absorbing static electricity to prevent the static electricity from damaging the product. Since the static electricity brings sudden high voltage and damages to product elements if the static electricity is not absorbed, the static electricity is absorbed by adding an anti-static interference module so as to avoid the damage to the product.
The data receiving module 30 is configured to receive data transmitted from the receiving and sending port BI, and then transmit the data to the data receiving port OUT. The data receiving port OUT and the data transmitting port IN both belong to internal interfaces, i.e., ports within the same communication module (e.g., display panel); the receiving and transmitting port BI belongs to an external interface, and is an interface for communication between two communication modules (e.g., a display panel and a control panel). The receiving and transmitting port BI is used for receiving data and transmitting data, that is, the same port is used for receiving data and transmitting data, so that two communication modules are connected by using a single wire, for example, the display panel is connected with the control panel by using a single wire.
Since the circuits of the data sending module 10 and the data receiving module 30 are connected, in order to avoid that when the data sending module 10 sends data, a part of data is transmitted to the data receiving module 30, which results in the data receiving module 30 being affected, it is set that when the data sending module 10 is in the on state, the data receiving module 30 is in the off state; similarly, when the data receiving module 30 is in the on state, the data sending module 10 is in the off state.
As shown in fig. 2, the data transmission module 10 includes: a switch unit 102 and a current limiting unit 104, wherein the switch unit 102 is connected with the current limiting unit 104; the switch unit 102 is configured to control an on-off state of the data sending module, amplify a voltage of the initial pulse signal when the data sending module is in the on state, and transmit data to the current limiting unit through the pulse signal of the amplified voltage; the current limiting unit 104 is connected to the receiving and transmitting port BI and is used for limiting current. Since the received current of the receiving and transmitting port BI needs to be limited to a relatively low current, a current limiting resistor needs to be arranged in front of the receiving and transmitting port BI to limit the current of the receiving and transmitting port BI.
The data receiving module 30 includes: the data receiving circuit comprises a waveform modulation unit 302 and a voltage division unit 304, wherein one end of the waveform modulation unit 302 is connected with the voltage division unit 304, and the voltage division unit 304 is connected with a data receiving port OUT; the other end of the waveform modulation unit 302 is connected to the current limiting unit 104 in the data transmission module 10, that is, both of them share one current limiting unit. Referring to fig. 2, the current limiting unit 104 is configured to receive data transmitted by the receiving and sending port BI, and then send the data to the waveform modulating unit 302, where the waveform modulating unit 302 sends the data to the voltage dividing unit 304, and then reaches the data receiving port OUT after passing through the voltage dividing unit 304.
The waveform modulation unit 302 is configured to convert an irregular periodic signal into a regular pulse signal; because data transmission between the communication modules (for example, data transmission between the display panel and the control panel) is realized through the transmission line, when the capacitance on the transmission line is larger, the rising edge of the waveform is obviously slowed down; when the transmission line is long and the impedance of the receiving end is not matched with the impedance of the transmission line, oscillation phenomena are generated on the rising edge and the falling edge of the waveform, and when other pulse signals are superposed on the rectangular pulse signal through the distributed capacitance between the wires or the common power line, additional noise appears on the signal, and waveform distortion occurs. The waveform modulation unit 302 converts the periodic signal with slowly changing edges into a rectangular pulse signal with steep edges, i.e. from an irregular malformed signal to a regular rectangular pulse signal.
The voltage dividing unit 304 is used for adjusting the voltage transmitted to the data receiving port OUT. Since the voltage received by the data receiving port OUT generally needs to be relatively small, the voltage to be transmitted needs to be reduced by voltage division, for example, the voltage to be transmitted in the circuit is 5V, and the voltage to be transmitted to the data receiving port OUT needs to be reduced to 3.3V by the voltage dividing unit.
The anti-electrostatic interference module 20 includes: the filter unit 202 and the clamping unit 204 are connected, and the filter unit 202 and the clamping unit 204 are connected; the filtering unit 202 is used for filtering out passing interference waves and absorbing passing static electricity; the clamping unit 204 is used to limit the potential of the target point. The filtering unit is used for filtering out interference waves and absorbing passing static electricity. Specifically, the filtered interference waves of which frequencies can be calculated by setting corresponding resistors and capacitors, and the specific calculation is a conventional means in the art and is not described herein. The clamping unit 204 is used to limit a point location of a certain point, that is, to prevent a potential of the certain point from being suddenly high or suddenly low, and the clamping unit 204 may be implemented by using a diode. The clamping action of the diode means that the point position of a certain point in the circuit is limited by the characteristic that the forward conduction voltage drop of the diode is relatively stable and the numerical value is small.
Referring to fig. 2, the filtering unit 202 is connected to the waveform modulating unit 302 in the data sending module, the data sent by the receiving and sending port BI first passes through the current limiting unit 104 and then passes through the filtering unit 202, the filtering unit 202 is configured to filter the pulse signal after passing through the current limiting unit, and send the processed pulse signal to the waveform modulating unit 302, and meanwhile, the filtering unit 202 is configured to absorb the passing static electricity.
As shown in fig. 3, in one embodiment, the switching unit 102 in the data transmission module 10 is composed of two transistors, one is an NPN transistor Q1, and the other is a PNP transistor Q2. A collector of an NPN triode Q1 is connected with a base of a PNP triode Q2, a base of the NPN triode Q1 is connected with a first power supply (3.3V), an emitter of the PNP triode Q2 is connected with the second power supply (5V), a voltage of the second power supply is higher than a voltage of the first power supply, and the emitter of the NPN triode is connected with a data transmission port IN for receiving data transmitted by the data transmission port; the NPN triode is used for conducting when the emitter is at a low level and the base is at a high level; the PNP triode is used for conducting when the base electrode is at a low level and the emitter electrode is at a high level; the current limiting unit 104 includes: and the current limiting resistor R5 is used for adjusting the current transmitted to the receiving and sending port BI.
When the emitter of the NPN transistor is at low level (0V), and the base is at high level (3.3V), the Q1 and Q2 are both IN conduction state, so that the voltage at the collector of the NPN transistor is 3.3V, and the collector of the NPN transistor Q1 is connected to the base of the PNP transistor Q2, so that the base of Q2 is 3.3V, and the emitter is connected to 5V, so that the base of the PNP transistor is at low level, and the emitter is at high level, so that the 5V pulse signal reaches the collector of the PNP transistor, and the collector of the PNP transistor is connected to the current limiting resistor R5, thereby limiting the current of the receiving and transmitting port BI.
The waveform modulation unit 302 includes: the reverse Schmitt trigger U1 is used for converting irregular periodic signals into rectangular pulse signals; the voltage dividing unit 304 includes: a first divider resistor R1 and a second divider resistor R2; one end of the first voltage-dividing resistor R1 is connected to the inverted schmitt trigger U1, and the other end of the first voltage-dividing resistor R1 is connected to the second voltage-dividing resistor R2 and the data receiving port OUT, respectively; the first voltage dividing resistor R1 and the second voltage dividing resistor R2 are used for dividing voltage and transmitting the divided data to the data receiving port OUT.
The filtering unit 202 includes: pi type filter circuit, pi type filter circuit includes: a first capacitor C1, a second capacitor C2 and a third resistor R3; the clamping unit includes: a first diode D1 and a second diode D2;
referring to fig. 3, one ends of the first capacitor C1 and the second capacitor C2 are Grounded (GND), the other end of the first capacitor C1 is connected to one end of the third resistor R3 through a wire, the other ends of the third resistor R3 are connected to the other end of the second capacitor C2 through a wire and the reverse end of the second diode D2, respectively, and the forward end of the second diode D2 is grounded;
the forward end of the first diode D1 is connected with the reverse end of the second diode D2, and the reverse end of the first diode D1 is connected with the emitter of a PNP triode Q2 in the data transmission module.
When positive static electricity is added to the receiving and transmitting port BI, part of the static electricity passes through the power supply loop of the first diode D1 to 5V after passing through the current limiting resistor R5, when negative static electricity is added to the receiving and transmitting port BI, the static electricity passes through R5, part of the static electricity passes through the second diode D2 to form a loop to the ground, and part of the static electricity is absorbed by the pi-type filter circuit (C1, R3 and C2), so that the product cannot be damaged by the positive static electricity or the negative static electricity, and in addition, the D1 and the D2 form a clamping unit which can limit the intersection voltage of the R3 and the R4 to a certain potential (for example, to 5V).
The single-wire communication conversion circuit further includes: a pull-down resistor R4; one end of the pull-down resistor R4 is connected to the other end of the third resistor R3, the other end of the pull-down resistor R4 is Grounded (GND), and the pull-down resistor R4 is configured to quickly pull the intersection voltage to zero when the intersection voltage of the third resistor R3 and the pull-down resistor R4 becomes a low level.
The single-wire communication conversion circuit shown in fig. 3 realizes single-wire transmission between the communication modules (for example, between the display panel and the control panel), that is, when data transmission is performed between two communication modules, the single-wire transmission can be realized by adopting a single wire. In addition, the data transmission module in each communication module (for example, in the display panel) adopts the pulse signal of amplified voltage (3.3V is amplified to 5V) to perform data transmission, which is beneficial to improving the anti-interference performance of transmission. That is, the interference resistance of data transmission by a 5V pulse signal is stronger than that of 3.3V. In addition, an inverse Schmitt trigger is adopted in the data receiving module, and can convert periodic signals with slowly changing edges into rectangular pulse signals with equal frequency without generating misoperation. The anti-static interference module adopts a pi-type filter circuit with strong anti-static capability and D1 and D2 absorption circuits, has good anti-static effect, and cannot damage products regardless of positive static electricity or negative static electricity.
The utility model also provides a single line communication device, this single line communication device includes: the first communication module and the second communication module are communicated through a single wire, and the first communication module and the second communication module both comprise the single-wire communication conversion circuit.
The first communication module and the second communication module, in one embodiment, may be a display panel and a control panel, respectively, that is, single-wire communication between the display panel and the control panel may be implemented. In another embodiment, the first communication module and the second communication module can also be a display panel and a driving panel, etc.
The utility model also provides an equipment can include: the single-wire communication device is provided. The equipment can be washing machine, refrigerator, air conditioner, etc., and is especially suitable for equipment with long distance between the display panel and the control panel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A single-wire communication conversion circuit, comprising: the data transmission module is connected with the antistatic interference module, the data receiving module is connected with the antistatic interference module, and the data transmission module and the data receiving module are respectively connected with a receiving and transmitting port through the same single line; in the data transmission process, the data sending module and the data receiving module are in different on-off states;
the data sending module is used for sending data to the receiving and sending port through a pulse signal of amplified voltage;
the antistatic interference module is used for absorbing static electricity and preventing the static electricity from damaging products;
the data receiving module is used for receiving the data transmitted from the receiving and sending port.
2. The circuit of claim 1, wherein the data transmission module comprises: the switch unit is connected with the current limiting unit;
the switch unit is used for controlling the on-off state of the data sending module, and is also used for amplifying the voltage of an initial pulse signal when the data sending module is in a conducting state, and transmitting data to the current limiting unit through the pulse signal of the amplified voltage;
the current limiting unit is connected with the receiving and sending port and used for sending the pulse signal transmission data to the receiving and sending port and limiting current of the receiving and sending port.
3. The circuit of claim 2, wherein the switching unit comprises: the collector of the NPN triode is connected with the base of the PNP triode, the base of the NPN triode is connected with a first power supply, the emitter of the PNP triode is connected with a second power supply, the voltage of the second power supply is higher than that of the first power supply, and the emitter of the NPN triode is connected with a data sending port and used for receiving data sent by the data sending port;
the current limiting unit includes: and the current limiting resistor is used for adjusting the current transmitted to the receiving and sending port.
4. The circuit of claim 1, wherein the data receiving module comprises: the waveform modulation unit is connected with the voltage division unit, and the voltage division unit is connected with a data receiving port;
the waveform modulation unit is used for converting irregular periodic signals into regular pulse signals and sending the pulse signals to the voltage division unit;
the voltage division unit is used for adjusting the voltage transmitted to the data receiving port so as to send the adjusted pulse signal to the data receiving port.
5. The circuit of claim 4, wherein the waveform modulation unit comprises: the reverse Schmitt trigger is used for converting irregular periodic signals into rectangular pulse signals;
the voltage dividing unit includes: a first voltage dividing resistor and a second voltage dividing resistor;
one end of the first voltage-dividing resistor is connected with the reverse Schmitt trigger, the other end of the first voltage-dividing resistor is respectively connected with one end of the second voltage-dividing resistor and the data receiving port, and the other end of the second voltage-dividing resistor is grounded.
6. The circuit of claim 1, wherein the anti-electrostatic interference module comprises: the filter unit is connected with the clamping unit, the filter unit is connected with the data receiving module, and the clamping unit is connected with the data sending module;
the filtering unit is used for filtering out passing interference waves and absorbing passing static electricity;
the clamping unit is used for limiting the potential of a target point.
7. The circuit of claim 6, wherein the filtering unit comprises: pi type filter circuit, pi type filter circuit includes: a first capacitor, a second capacitor and a third resistor; the clamping unit includes: a first diode and a second diode;
one end of the first capacitor is grounded, the other end of the first capacitor is connected with the data receiving module and one end of the third resistor, the other end of the third resistor is connected with the other end of the second capacitor and the reverse end of the second diode through leads, and the forward end of the second diode is grounded;
and the forward end of the first diode is connected with the reverse end of the second diode, and the reverse end of the first diode is connected with the data sending module.
8. The circuit of claim 7, further comprising: a pull-down resistor;
one end of the pull-down resistor is connected with the other end of the third resistor, the other end of the pull-down resistor is grounded, and the pull-down resistor is used for rapidly pulling the intersection voltage to zero when the intersection voltage of the third resistor and the pull-down resistor becomes low level.
9. A single-wire communication device, comprising: the communication device comprises a first communication module and a second communication module, wherein the first communication module and the second communication module communicate through a single wire, the first communication module comprises the single-wire communication conversion circuit according to any one of claims 1 to 8, and the second communication module comprises the single-wire communication conversion circuit according to any one of claims 1 to 8.
10. An apparatus comprising the single-wire communication device of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021979467.2U CN213426160U (en) | 2020-09-11 | 2020-09-11 | Single-wire communication conversion circuit, single-wire communication device and equipment |
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| CN202021979467.2U CN213426160U (en) | 2020-09-11 | 2020-09-11 | Single-wire communication conversion circuit, single-wire communication device and equipment |
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| CN213426160U true CN213426160U (en) | 2021-06-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438065A (en) * | 2021-08-30 | 2021-09-24 | 深圳赫飞物联科技有限公司 | Single-wire communication circuit capable of supporting forward and backward connection and application thereof |
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2020
- 2020-09-11 CN CN202021979467.2U patent/CN213426160U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438065A (en) * | 2021-08-30 | 2021-09-24 | 深圳赫飞物联科技有限公司 | Single-wire communication circuit capable of supporting forward and backward connection and application thereof |
| CN113438065B (en) * | 2021-08-30 | 2021-11-19 | 深圳赫飞物联科技有限公司 | Single-wire communication circuit capable of supporting forward and backward connection and application thereof |
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