CN210351117U - Multifunctional signal switching circuit and display device - Google Patents
Multifunctional signal switching circuit and display device Download PDFInfo
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- CN210351117U CN210351117U CN201921160325.0U CN201921160325U CN210351117U CN 210351117 U CN210351117 U CN 210351117U CN 201921160325 U CN201921160325 U CN 201921160325U CN 210351117 U CN210351117 U CN 210351117U
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Abstract
A multifunctional signal switching circuit and a display device are provided, the multifunctional signal switching circuit includes: the device comprises a control module, a signal access module, a switch module, a signal filtering module and a signal transmission module; the control module generates a control signal; the signal access module generates a pulse width modulation signal; the switch module is switched on or switched off according to the control signal to generate a first switch control signal or a second switch control signal; the signal filtering module is used for filtering the pulse width modulation signal according to the first switch control signal and outputting a direct current control signal; the signal transmission module transmits the pulse width modulation signal according to the second switching signal; therefore, the multifunctional signal switching circuit in the embodiment of the application can perform self-adaptive type switching on the pulse width modulation signals according to the control signals so as to output different types of signals, has strong compatibility, can be universally applied to various different types of circuit systems, and greatly reduces the switching and output cost of the different types of signals.
Description
Technical Field
The application belongs to the technical field of electronic circuits, and particularly relates to a multifunctional signal switching circuit and a display device.
Background
With the rapid development of electronic circuit technology, technicians design different types of electronic circuits to realize corresponding circuit functions, each type of electronic circuit comprises a relatively complex connection relationship of electronic components, and each type of electronic circuit can be applied to various different industrial scenes to meet the circuit function requirements of technicians; each electronic circuit needs to be connected with a specific type of driving signal, and the electronic circuit can be in a rated working state through the driving signal; and since the functions of the electronic circuits in the related industrial technology fields are various, the technical personnel need to design the driving signals matched with the functions of the electronic circuits so as to enable the electronic circuits to keep the normal working state.
However, once the circuit structure of the driving circuit in the conventional technology is designed, the driving circuit can only output a specific type of driving signal, and only a single type of electronic circuit can be driven to enter a working state through the driving circuit, so that the driving circuit cannot be applied to electronic circuits with different circuit functions, and the compatibility is low; if the traditional drive circuit is required to be applied to electronic circuits with different circuit functions, technicians can only modify the hardware circuit structure of the drive circuit, so that the modified drive circuit can output different types of drive signals, and the drive operation of the multifunctional circuit is realized; therefore, when the driving circuit in the conventional technology switches the driving signals with different functions, a large cost is required, the switching output of the signals has complicated steps, and the hardware structure of the driving circuit needs to be redesigned, which is technically difficult to implement and is not generally applicable.
SUMMERY OF THE UTILITY MODEL
In view of this, embodiments of the present application provide a multifunctional signal switching circuit and a display device, which aim to overcome the disadvantages of the conventional circuit driving method being single and reducing the driving control effect of an electronic circuit due to the fact that signal type switching in the exemplary technology is too high in cost, complex in operation and low in compatibility.
A first aspect of an embodiment of the present application provides a multifunctional signal switching circuit, including:
a control module that generates a control signal;
a signal access module that generates a pulse width modulation signal;
the switch module is connected with the control module and is switched on or off according to the control signal to generate a first switch control signal or a second switch control signal;
the signal filtering module is connected with the switch module and the signal access module, and outputs a direct current control signal after filtering the pulse width modulation signal according to the first switch control signal; and
and the signal transmission module is connected with the signal access module and the switch module and transmits the pulse width modulation signal according to a second switch signal.
In one embodiment, the device further comprises a current limiting module;
the current limiting module carries out current limiting processing on the pulse width modulation signal, and the current limiting module is connected with the signal access module, the signal filtering module and the signal transmission module.
In one embodiment thereof, the current limiting module comprises:
a first resistor and a second resistor;
the first end of the first resistor and the first end of the second resistor are connected to the signal access module in common;
the second end of the first resistor is connected with a first direct current power supply;
and the second end of the second resistor is connected with the signal filtering module and the signal transmission module.
In one embodiment thereof, the switch module comprises at least one switch tube;
when the control signal is in a first level state and the switch tube is conducted, the switch module outputs a first switch control signal;
when the control signal is in a second level state and the switch tube is disconnected, the switch module outputs a second switch control signal.
In one embodiment thereof, the switch module comprises a plurality of cascaded switch tubes;
in the cascaded switch tubes, the control end of each switch tube is connected with the control module, the first conduction end of the first switch tube is connected with the signal filtering module and the signal transmission module, the second conduction end of the previous switch tube is connected with the first conduction end of the next switch tube, and the second conduction end of the last switch tube is grounded.
In one embodiment, the signal filtering module comprises a plurality of filtering capacitors connected in parallel;
the first end of each filter capacitor is connected with the signal access module and the signal transmission module, and the second end of each filter capacitor is connected with the signal filter module.
In one embodiment, the system further comprises a signal indication module,
the signal indication module is connected with the signal filtering module and the signal transmission module, and the signal indication module sends a first state indication signal according to the direct current control signal and sends a second state indication signal according to the second switch signal.
In one embodiment, the device further comprises a voltage stabilizing module;
the voltage stabilizing module is connected between the control module and the second direct-current power supply and is used for carrying out voltage stabilizing processing on the control signal.
In one embodiment, the signal access module comprises a pulse width modulation chip;
the power supply pin of the pulse width modulation chip is connected with a third direct current power supply;
and a signal output pin of the pulse width modulation chip is connected with the signal filtering module and the signal transmission module.
A second aspect of an embodiment of the present application provides a display device, including:
the multifunctional signal switching circuit as described above; and
a display panel;
the multifunctional signal switching circuit is connected with the display panel, and the display panel displays the direct current control signal or the pulse width modulation signal.
The multifunctional signal switching circuit can change the on-off state of the switch module through the control signal so as to realize the switching function of the signal type, the signal filtering module can output a direct current control signal after filtering the pulse width modulation signal, and the signal transmission module can directly transmit the pulse width modulation signal; the direct current control signal and the pulse width modulation signal have different circuit driving information so as to be suitable for different types of circuit functions; therefore, the multifunctional signal switching circuit does not need to change the hardware circuit structure of the multifunctional signal switching circuit, can perform self-adaptive switching on the signal output state according to the control signal, is simple and convenient to operate, greatly reduces the switching cost of different types of signals, and has higher compatibility and practical value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a multifunctional signal switching circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a multi-functional signal switching circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a current limiting module according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a switch module according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of a signal filtering module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a multi-function signal switching circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a multi-function signal switching circuit according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, in the structural schematic diagram of the multi-functional signal switching circuit 10 provided in the embodiment of the present application, the multi-functional signal switching circuit 10 has a simplified signal type switching step, so that the switching output cost of different types of signals is reduced, and further, different circuit driving functions can be realized by signals output by the multi-functional signal switching circuit 10, so that the compatibility is very strong; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
the above-mentioned multi-function signal switching circuit 10 includes: the system comprises a control module 101, a signal access module 102, a switch module 103, a signal filtering module 104 and a signal transmission module 105.
The control module 101 generates a control signal.
The control module 101 has a centralized control function, the control signal contains control information, and the control signal can enable the multifunctional signal switching circuit 10 to realize a complete and real-time signal switching function so as to meet different circuit function requirements of technicians; therefore, the signal switching state can be directly changed through the control module 101, and the multifunctional signal switching circuit 10 has higher control response precision and control response speed and extremely strong controllability; the multi-functional signal switching circuit 10 is generally applicable to different circuit systems, and has a signal type switching output function and high compatibility.
The signal access module 102 generates a Pulse Width Modulation (PWM) signal.
The signal access module 102 has a signal generation function, and the PWM signal contains circuit driving information, and the PWM signal is used as an original signal in the signal switching process of the multifunctional signal switching circuit 10, and can drive the electronic device to implement a corresponding circuit function through the PWM signal, so that the signal control accuracy and the signal control rate of the multifunctional signal switching circuit 10 are improved; in this embodiment, the signal access module 102 realizes a higher signal transmission rate, speeds up the multi-functional signal switching process, the multi-functional signal switching circuit 10 can realize a better driving control function for the external electronic device, and the multi-functional signal switching circuit 10 has higher communication compatibility.
The switch module 103 is connected to the control module 101, and the switch module 103 is turned on or off according to the control signal to generate a first switch control signal or a second switch control signal.
The switch module 103 has an on-off control function, and when the control module 101 outputs a control signal to the switch module 103, the switch module 103 can be turned on or off to drive the multifunctional signal switching circuit 10 to realize a corresponding signal type switching function; specifically, the switch module 103 is turned on or off according to the level state of the control signal; when the control signal is in the first level state, the switch module 103 is turned on to output a first switch control signal; when the control signal is in the second level state, the switch module 103 is turned off to output a second switch control signal; optionally, the first level state is a high level state or a low level state, for example, the first level state is a high level state, and the second level state is a low level state; wherein the first switch control signal and the second switch control signal contain different circuit control information; the on-off state of the switch module 103 has higher control response precision and control response efficiency; it is beneficial for the multi-functional signal switching circuit 10 to realize a stable signal switching function.
The signal filtering module 104 is connected to the switch module 103 and the signal access module 102, and the signal filtering module 104 filters the pulse width modulation signal according to the first switch control signal and outputs a direct current control signal.
The signal filtering module 104 has a filtering function, and when the switch module 103 outputs the first switch control signal to the signal filtering module 104, the first switch control signal can drive the filtering module 104 to be in a working state; if the signal filtering module 104 does not receive the first switch control signal, the signal filtering module 104 is in a stop state; the filtering module 104 can realize a signal filtering function through the first switch control signal, and since the PWM signal has a specific duty ratio, the waveform of the PWM signal includes a high level state and a low level state; however, after the signal filtering processing of the signal filtering module 104, the high-low level change performance of the PWM signal can be eliminated in time, and the dc control signal output by the signal filtering module 104 only contains a dc component, for example, the dc control signal is always maintained in a high level state or always maintained in a low level state; therefore, in the present embodiment, the form of the PWM signal can be changed through filtering processing, so that the signal filtering module 104 realizes conversion of signal forms, the PWM signal and the dc control signal belong to two completely different types of signals, and different circuit driving functions can be realized to complete the conversion function of signal types; the signal filtering module 104 has a simple signal format conversion function for the PWM signal, the PWM signal after filtering can be applied to different electronic devices, and drives the electronic devices to implement corresponding circuit functions, and the signal filtering module 104 has a simplified signal format conversion function with high accuracy.
The signal transmission module 105 is connected to the signal access module 102 and the switch module 103, and the signal transmission module 105 transmits the pulse width modulation signal according to the second switch signal.
The signal transmission module 105 has a signal compatible transmission function, can keep the integrity and anti-interference of the pulse width modulation signal in the transmission process, and ensures the power of the pulse width modulation signal in the transmission process; when the switch module 103 outputs the second switch signal, the switch module 103 transmits the second switch signal to the signal transmission module 105, the signal transmission state of the signal transmission module 105 can be changed in real time through the second switch signal, at this time, the signal transmission module 105 directly outputs the PWM signal, the electronic device can be driven by the PWM signal to execute a corresponding circuit action according to the actual requirement of a technician, and the signal control response speed of the multifunctional signal switching circuit 10 is ensured; the multifunctional signal switching circuit 10 does not perform type conversion on the PWM signal under the driving of the second switching signal, and the PWM signal can be directly applied to a circuit system and exert a responsive circuit control function; therefore, the signal transmission module 105 in this embodiment can ensure the original function of the PWM signal, achieve efficient transmission of the signal, and achieve an accurate signal control function through the PWM signal.
Optionally, the signal transmission module 105 is connected to the signal filtering module 104, and further the switch module 103 can change the working states of the signal filtering module 104 and the signal transmission module 105 more quickly, so as to improve the signal type switching response speed of the multifunctional signal switching circuit 10.
In the structural schematic of the multi-function signal switching circuit 10 shown in fig. 1, the multi-function signal switching circuit 10 can flexibly switch the output state of the signal according to the control information, and can selectively output a direct current control signal or a pulse width modulation signal; since the two signals have completely different level forms and circuit driving functions, the signal type switching function of the multi-functional signal switching circuit 10 is applicable to various different industrial technical fields; the multifunctional signal switching circuit 10 in this embodiment selects the signal filtering module 104 and the signal transmission module 105 to enter corresponding operating states through the on or off state of the switch module 103 without changing the internal circuit structural form of the circuit; when the signal filtering module 104 is operated and the signal transmission module 105 is stopped, the multifunctional signal switching circuit 10 outputs a direct current control signal; when the signal filtering module 104 stops and the signal transmission module 105 operates, the multifunctional signal switching circuit 10 outputs a PWM signal; therefore, the switching output of different types of signals of the multifunctional signal switching circuit 10 has higher controllability and flexibility, and the switching cost and the signal switching complexity of different functional signals are reduced; the multifunctional signal switching circuit 10 can correspondingly convert and output the PWM signal according to the actual circuit function requirement of the technician, the application range is wide, the precision and the rate of signal switching are high, the signal output by the multifunctional switching circuit 10 can enable the electronic device to realize a more stable circuit function so as to meet the actual circuit function requirement of the technician, and the compatibility is strong; the problems that the cost of signal type switching is too high, the operation steps are complex, the technical realization difficulty is too high, and the universal application is difficult in the exemplary technology are effectively solved.
As an alternative implementation, fig. 2 shows another circuit structure schematic of the multi-function signal switching circuit 10 provided in this embodiment, and compared with the structure schematic of the multi-function signal switching circuit 10 in fig. 1, the multi-function signal switching circuit 10 in fig. 2 further includes a current limiting module 106.
The current limiting module 106 is connected to the signal access module 102, the signal filtering module 104 and the signal transmission module 105, and the current limiting module 106 performs current limiting processing on the pulse width modulation signal.
The current limiting module 106 can prevent the level amplitude of the PWM signal from exceeding the safety threshold, and the PWM signal output by the signal access module 102 includes a circuit control function, so that the current limiting function of the current limiting module 106 can prevent the signal filtering module 104 and the signal transmission module 105 from being physically damaged in the signal switching process, and when the current limiting module 106 outputs the current-limited PWM signal to the multi-function signal switching circuit 10, the multi-function signal switching circuit 10 can realize a safer signal type switching function, and has higher compatibility; various types of signals output after signal switching is performed by the multifunctional signal switching circuit 10 can enable the electronic device to be in a rated working state, so that the safety and stability of the PWM signal can be guaranteed by the current limiting module 106 in this embodiment, and the multifunctional signal switching circuit 10 has a higher signal type switching safety level and a higher anti-interference performance of signal transmission.
As an alternative implementation, fig. 3 shows a circuit structure of the current limiting module 106 provided in this embodiment, please refer to fig. 3, where the current limiting module 106 includes: a first resistor R1 and a second resistor R2.
The first end of the first resistor R1 and the first end of the second resistor R2 are connected to the signal access module 102 in common; the signal access module 102 outputs the PWM signal to the current limiting module 106.
The second end of the first resistor R1 is connected with a first direct current power supply VCC 1; optionally, the first dc power supply VCC1 is a 1V-10V dc power supply, and the PWM signal can maintain normal power during transmission through the dc power output by the first dc power supply VCC 1.
The second end of the second resistor R2 is connected to the signal filtering module 104 and the signal transmission module 105; and current limit module 106 has a higher communication compatibility.
The current limiting module 106 shown in fig. 3 has a relatively simplified circuit structure, and the first resistor R1 and the second resistor R2 can implement an accurate voltage stabilizing function for the PWM signal, that is, the integrity of circuit control information in the PWM signal is maintained, and the PWM signal can be prevented from being in an overvoltage state, and the current limiting module 106 can greatly ensure the switching safety and reliability of the signal type for the current limiting processing of the PWM signal, so that the current limiting module 106 has a relatively wide application range, and further reduces the switching cost of the signal type and the signal switching complexity.
As an alternative embodiment, the switch module 103 includes at least one switch tube; when the control signal is in a first level state and the switching tube is conducted, the switching module outputs a first switching control signal; when the control signal is in a second level state and the switch tube is disconnected, the switch module outputs a second switch control signal.
Optionally, the switch tube is a triode or an MOS tube, for example, the switch tube is an NMOS tube, so the switch module 103 has a relatively compatible circuit structure, and the on or off state of the switch tube can be changed in real time through a control signal, so that the switch module 103 can output a first switch signal or a second switch signal, and by changing the level state of the control signal, the switch module 103 can output different types of switch control signals, and the switch module 103 has a relatively high control response speed.
As an optional implementation manner, the switch module 103 includes an NMOS transistor, a drain of the NMOS transistor is connected to the signal filtering module 104 and the signal transmission module 105, a source of the NMOS transistor is grounded, a gate of the NMOS transistor is connected to the control module 101, and further a potential state of the gate of the NMOS transistor can be adjusted by a control signal output by the control module 101, so that the drain and the source of the NMOS transistor can be turned on or off, and further a control response precision of signal type switching can be improved by turning on or off the NMOS transistor, a signal type switching process of the multifunctional signal switching circuit 10 has simplified operation steps, and is highly controllable.
As an alternative implementation, fig. 4 shows a schematic circuit structure of the switch module 103 provided in this embodiment, please refer to fig. 4, where the switch module 103 includes a plurality of cascaded switch tubes; in the cascaded switching tubes, the control end of each switching tube is connected with the control module 101, and then the control module 101 synchronously transmits control signals to the control ends of the switching tubes, so that the switching tubes can be switched on or off, and the on-off states of the switching tubes have higher control efficiency and sensitivity; the first conducting end of the first switch tube is connected with the signal filtering module 104 and the signal transmission module 105, the second conducting end of the previous switch tube is connected with the first conducting end of the next switch tube, and the second conducting end of the last switch tube is grounded GND.
In the embodiment, the plurality of switching tubes can be simultaneously controlled to be synchronously switched on or switched off through the level state of the control signal so as to generate a first switching control signal or a second switching control signal, and the single-device fault can be avoided through the parallel control realized by the plurality of switching tubes, so that the on-off control error of the switching module 103 caused by the disturbance of the control signal is prevented; in addition, in the embodiment, the number of the switching tubes of the switching module 103 can be set arbitrarily, so that the on or off state of the switching module 103 has higher control flexibility and compatibility, and can be universally applied to different industrial technical fields; switch module 103 can output the higher on-off control signal of precision, can drive multi-functional signal switching circuit 10 to output the signal of different grade type according to switch module 103's the on or off state, the signal switching process of different grade type has higher stability and anti-interference ability, multi-functional signal switching circuit 10 passes through the signal and switches back output various types of signal, can drive electronic equipment to realize more stable circuit function, in order to satisfy technical staff's actual circuit function demand.
As an optional implementation manner, fig. 5 shows a schematic circuit structure of the signal filtering module 104 provided in this embodiment, please refer to fig. 5, where the signal filtering module 104 includes a plurality of filtering capacitors CS connected in parallel; a first end of each filter capacitor CS is connected to the signal access module 102 and the signal transmission module 105, and a second end of each filter capacitor CS is connected to the switch module 103.
In this embodiment, the filter capacitor CS can implement filtering processing on the signal, so that the direct current control signal is obtained after the filtering processing of the signal filtering module 104, and the direct current control signal only retains a direct current component, so as to implement a switching function between the PWM signal and the direct current control signal, and has strong controllability, and ensure the signal type conversion efficiency and the conversion accuracy of the multifunctional signal switching circuit 10; in this embodiment, the switch module 103 can change the operating state of the signal filtering module 104, so that the signal filtering module 104 operates or stops, and accordingly, the signal filtering module 104 can also output different types of signals, and the signal switching precision is high; when the switch module 103 controls the signal filtering module 104 to enter a working state, the plurality of filtering capacitors CS can perform a filtering function, and output a corresponding direct current control signal in real time, thereby ensuring the accuracy of the level state of the direct current control signal; in this embodiment, the circuit structure of the signal filtering module 104 has higher expandability and compatibility, and the controllability of the multi-function signal switching circuit 10 is stronger.
As an alternative implementation, fig. 6 shows another structural schematic of the multi-function signal switching circuit 10 provided in this embodiment, and compared with the structural schematic of the multi-function signal switching circuit 10 shown in fig. 1, the multi-function signal switching circuit 10 in fig. 6 further includes a signal indication module 107.
The signal indication module 107 is connected to the signal filtering module 104 and the signal transmission module 105, and the signal indication module 107 sends a first status indication signal according to the dc control signal and sends a second status indication signal according to the pwm signal.
The signal indicating module 107 has a state displaying function, so that a technician can more intuitively acquire the signal type switching state of the multifunctional signal switching circuit 10 according to the signal indicating module 107, so as to improve the signal type switching precision and the safety performance of the multifunctional signal switching circuit 10, and the multifunctional signal switching circuit 10 has higher man-machine interaction performance and brings higher use experience to the technician; specifically, when the working states of the signal filtering module 104 and the signal transmission module 105 are switched through the switch module 103, the signal indication module 107 can send out a first state indication signal or a second state indication signal in real time to accurately display the signal type output by the multifunctional signal switching circuit 10, so that the signal switching accuracy and the stability of the multifunctional signal switching circuit 10 are greatly guaranteed, and the direct current control signal or the PWM signal output by the multifunctional signal switching circuit 10 can be universally applied to different industrial technical fields and realize corresponding circuit functions; the signal type switching function realized by the multifunctional signal switching circuit 10 has higher adjustability and flexibility, and the electronic equipment can be driven by the direct current control signal or the PWM signal to realize the corresponding circuit function so as to meet the actual circuit function requirements of technicians, so that the practical value is higher.
Illustratively, the first status indication signal and the second status indication signal both belong to an optical signal or an acoustic signal; when the multifunctional signal switching circuit 10 performs signal switching to output a direct current control signal or a PWM signal, the signal indication module 107 may monitor the working states of both the signal filtering module 104 and the signal transmission module 105 in real time, and provide corresponding state indication information to a technician in the form of an optical signal or an acoustic signal, so that the sensitivity and the practical value of signal type switching are higher.
Illustratively, the signal indicating module 107 includes at least one light emitting diode, and the signal type output state of the multifunctional signal switching circuit 10 can be displayed in real time according to the light emitting state of the light emitting diode, and the signal indicating module 107 has a simplified circuit structure.
Illustratively, the signal indication module 107 includes a speaker, and the actual signal type output by the multifunctional signal switching circuit 10 can be obtained according to the sound content emitted by the speaker, so that the technician has a higher use experience and a higher practical value.
As an alternative implementation, fig. 7 shows another schematic structure of the multi-function signal switching circuit 10 provided in this embodiment, and compared with the structure of the multi-function signal switching circuit 10 in fig. 1, the multi-function signal switching circuit 10 in fig. 7 further includes a voltage stabilizing module 108.
The voltage regulation module 108 is connected between the control module 101 and the second dc power VCC2, and the voltage regulation module 108 regulates the voltage of the control signal.
The voltage stabilizing module 108 can ensure the safety and the anti-interference performance of the control signal in the transmission process, the voltage stabilizing processing is timely performed on the control signal, the control signal contains more accurate control information, the voltage stabilizing module 101 outputs the control signal after the voltage stabilizing processing to the switch module 103, so that the multifunctional signal switching circuit 10 outputs signals of different types, and the switching process of the signal types has higher control response precision and control response efficiency; control module 101 outputs control signal, can drive the circuit module among the multi-functional signal switching circuit 10 through control signal and realize corresponding circuit function, has ensured the inside physical security of multi-functional signal switching circuit 10, and control module 101 can carry out signal switching according to technical staff's actual demand, and the signal switching process has higher operation sensitivity.
Illustratively, the voltage stabilizing module 108 includes a voltage stabilizing resistor, wherein a first end of the voltage stabilizing resistor is connected to the second dc power VCC2, a second end of the voltage stabilizing resistor is connected to the control module 101, and then the voltage stabilizing resistor can maintain a high anti-interference performance of the control signal during transmission, which is beneficial to improving the control response performance of the multifunctional signal switching circuit 10, and the voltage stabilizing module 108 has a relatively simplified circuit structure.
Optionally, the second dc power VCC2 is a 1V-10V dc power supply, the normal working performance of the voltage regulator module 108 can be ensured by the dc power output by the second dc power VCC2, and the switching of the signal types has higher controllable performance.
As an alternative embodiment, the signal access module 102 includes a pulse width modulation chip; the power supply pin of the pulse width modulation chip is connected with a third direct current power supply; the signal output pin of the pulse width modulation chip is connected with the signal filtering module and the signal transmission module.
Optionally, the third dc power supply is a 1.0V-50.0V dc power supply;
illustratively, the model of the pulse width modulation chip is EG3525 or SG3525, the circuit structure of the signal access module 102 has strong compatibility and expandability, and the PWM signal generated by the pulse width modulation chip has strong anti-interference performance.
In this embodiment, the signal access module 102 may implement a function of generating a PWM signal through a pulse width modulation chip, and may drive the multi-functional signal switching circuit 10 to implement an accurate signal type switching function through the PWM signal, thereby ensuring the signal switching efficiency and the signal switching accuracy of the multi-functional signal switching circuit 10; the signal access module 102 has a relatively simplified circuit structure, the third dc power supply outputs dc power to the pulse width modulation chip, so that the pulse width modulation chip converts the dc power to obtain a PWM signal, and a signal output pin of the pulse width modulation chip can output a more stable PWM signal in real time, the PWM signal can be transmitted more quickly in the multifunctional signal switching circuit 10, thereby avoiding a delay or distortion phenomenon of the PWM signal in the transmission process; therefore, the PWM signal in this embodiment has a simplified generation step, which is beneficial to reduce the signal type switching cost of the multi-function signal switching circuit 10; the signal access module 102 can output a PWM signal with higher accuracy according to the actual requirement of the technician, and has stronger compatibility.
Fig. 8 shows a schematic structure of the display device 80 provided in this embodiment, please refer to fig. 8, in which the display device 80 includes the multifunctional signal switching circuit 10 and the display panel 801 as described above, the multifunctional signal switching circuit 10 is connected to the display panel 801, and the display panel 801 displays a dc control signal or a pulse width modulation signal; the multifunctional signal switching circuit 10 accesses a video data signal, converts the video data into a first video signal or a second video signal, and outputs the first video signal or the second video signal to the display panel 801; the display panel 801 plays corresponding image information according to the first video signal or the second video signal to meet the visual requirements of the technician.
In one embodiment, the Display device 80 can be any type of Display device provided with the multifunctional signal switching circuit 10, such as an LCD (Liquid Crystal Display), an OLED (organic electroluminescent Display), a QLED (Quantum Dot light emitting diode) Display, or a curved Display device.
Referring to the above-mentioned embodiments of fig. 1 to 7, when the multi-function signal switching circuit 10 accesses a video data signal, the video data signal contains large-capacity video information, and the video data signal is used as a pulse width modulation signal, and the multi-function signal switching circuit 10 switches and outputs the video data signal according to control information of a technician, so that the first video signal or the second video signal output by the multi-function signal switching circuit 10 contains complete and high-quality video information; because the first video signal and the second video signal have different video data formats, the video signals of different types output by the multifunctional signal switching circuit 10 can completely match the video playing requirements of the display panel 801, so that the display device 80 can be applied to different industrial technical fields, and the complete video playing function is maintained, and the compatibility is strong; therefore, the display device 80 in this embodiment can switch and output video data signals according to the type of the display panel 801, the video information has simplified signal type switching steps and signal conversion cost, the operation is simple, the video signals switched and output by the multifunctional signal switching circuit 10 can be applied to various types of display panels 801, the video driving performance of the display panel 801 is improved, the application range is wide, the display device 80 can present better visual effect, and the practical value is higher; the problems that the compatibility of a display device in the exemplary technology is low, the switching cost between different types of video signals is high, the control steps of image display are complicated, the video display effect of the display device according to video information is poor, the visual experience of technicians is poor, and the flexibility and controllability of the video display state of the display device are low are solved.
To sum up, the multifunctional signal switching circuit 10 provided in the embodiment of the present application has a simplified circuit module structure, is relatively strong in controllability, and can switch and output signals with different level forms according to a control signal to drive various external electronic devices to implement stable and safe circuit functions, the multifunctional signal switching circuit 10 has a simplified signal switching step, cannot change a hardware structure of the circuit, and can output various types of signals, the switching cost of signal types is relatively low, the compatibility is relatively strong, the operation is simple and convenient, the signal accuracy in the signal type switching process is ensured, and the circuit control accuracy is improved; the multifunctional signal switching circuit 10 will play a positive role in promoting the compatible conversion technology of different types of signals in the field, and will generate important practical production value.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or structure that comprises a list of elements is inherently related to the elements. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the instant numbers; the above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A multi-function signal switching circuit, comprising:
a control module that generates a control signal;
a signal access module that generates a pulse width modulation signal;
the switch module is connected with the control module and is switched on or off according to the control signal to generate a first switch control signal or a second switch control signal;
the signal filtering module is connected with the switch module and the signal access module, and outputs a direct current control signal after filtering the pulse width modulation signal according to the first switch control signal; and
and the signal transmission module is connected with the signal access module and the switch module and transmits the pulse width modulation signal according to a second switch signal.
2. The multi-function signal switching circuit of claim 1, further comprising a current limiting module;
the current limiting module is connected with the signal access module, the signal filtering module and the signal transmission module, and the current limiting module carries out current limiting processing on the pulse width modulation signal.
3. The multi-function signal switching circuit of claim 2, wherein the current limiting module comprises:
a first resistor and a second resistor;
the first end of the first resistor and the first end of the second resistor are connected to the signal access module in common;
the second end of the first resistor is connected with a first direct current power supply;
and the second end of the second resistor is connected with the signal filtering module and the signal transmission module.
4. The multi-function signal switching circuit of claim 1, wherein the switching module comprises at least one switching tube;
when the control signal is in a first level state and the switch tube is conducted, the switch module outputs a first switch control signal;
when the control signal is in a second level state and the switch tube is disconnected, the switch module outputs a second switch control signal.
5. The multi-function signal switching circuit of claim 4, wherein the switching module comprises a plurality of cascaded switching tubes;
in the cascaded switch tubes, the control end of each switch tube is connected with the control module, the first conduction end of the first switch tube is connected with the signal filtering module and the signal transmission module, the second conduction end of the previous switch tube is connected with the first conduction end of the next switch tube, and the second conduction end of the last switch tube is grounded.
6. The multi-function signal switching circuit of claim 1, wherein said signal filtering module comprises a plurality of filtering capacitors connected in parallel;
the first end of each filter capacitor is connected with the signal access module and the signal transmission module, and the second end of each filter capacitor is connected with the switch module.
7. The multi-function signal switching circuit of claim 1, further comprising a signal indication module;
the signal indication module is connected with the signal filtering module and the signal transmission module, and the signal indication module sends a first state indication signal according to the direct current control signal and sends a second state indication signal according to the pulse width modulation signal.
8. The multi-function signal switching circuit of claim 1, further comprising a voltage regulation module;
the voltage stabilizing module is connected between the control module and the second direct-current power supply and is used for carrying out voltage stabilizing processing on the control signal.
9. The multi-function signal switching circuit of claim 1, wherein said signal access module comprises a pulse width modulation chip;
the power supply pin of the pulse width modulation chip is connected with a third direct current power supply;
and a signal output pin of the pulse width modulation chip is connected with the signal filtering module and the signal transmission module.
10. A display device, comprising:
a multi-function signal switching circuit as claimed in any one of claims 1-9; and
a display panel;
the multifunctional signal switching circuit is connected with the display panel, and the display panel displays the direct current control signal or the pulse width modulation signal.
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| CN201921160325.0U CN210351117U (en) | 2019-07-22 | 2019-07-22 | Multifunctional signal switching circuit and display device |
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| CN201921160325.0U CN210351117U (en) | 2019-07-22 | 2019-07-22 | Multifunctional signal switching circuit and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257702A (en) * | 2021-11-04 | 2022-03-29 | 科大讯飞股份有限公司 | Audio and video processing circuit, control method, control device and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257702A (en) * | 2021-11-04 | 2022-03-29 | 科大讯飞股份有限公司 | Audio and video processing circuit, control method, control device and electronic equipment |
| CN114257702B (en) * | 2021-11-04 | 2024-02-13 | 科大讯飞股份有限公司 | Audio and video processing circuit, control method, control device and electronic equipment |
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