CN219512388U - Switch circuit for detecting backlight circuit - Google Patents
Switch circuit for detecting backlight circuit Download PDFInfo
- Publication number
- CN219512388U CN219512388U CN202320451958.7U CN202320451958U CN219512388U CN 219512388 U CN219512388 U CN 219512388U CN 202320451958 U CN202320451958 U CN 202320451958U CN 219512388 U CN219512388 U CN 219512388U
- Authority
- CN
- China
- Prior art keywords
- module
- backlight
- detection
- operation switch
- backlight display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a switch circuit for detecting a backlight circuit, which relates to the technical field of automobile circuits; the device comprises an operation switch module, a control module and a control module, wherein the operation switch module is used for controlling the on-off of a corresponding device; the backlight display module is used for controlling the on-off of the backlight display lamp; the connecting module is used for connecting the operation switch module and the backlight display module in the same loop, and is connected between the operation switch module and the backlight display module; the detection module is used for judging the connection state of the operation switch module and the backlight display module and outputting corresponding detection signals, the input end of the detection module is connected to the input end of the operation switch module and used for collecting the connection information of the operation switch module and the backlight display module, and the detection module distinguishes the collected connection information and outputs the corresponding detection signals after judging. The utility model can realize the joint diagnosis of the connection of the operation switch module and the backlight display module through the detection module, and reduces the cost of intelligent detection of the whole vehicle.
Description
Technical Field
The utility model relates to the technical field of automobile circuits, in particular to a switch circuit for detecting a backlight circuit.
Background
The automobile switch comprises two basic functions of a switch circuit and a backlight display circuit, wherein the switch circuit is used for feeding back the operation of a user, and the backlight display circuit enables the user to see the operation position at night.
Along with the intelligent upgrade of the automobile, the automobile switch should identify and diagnose the fault caused by the disconnection of the line, thereby supporting the intelligent self-checking function of the automobile. The existing backlight power supply is provided by a backlight power supply switch, all backlight switch products of the whole automobile are connected in parallel on the backlight power supply line, and the circuit is connected in parallel, so that the self-diagnosis on whether the backlight lines on all the switch lines are normally connected cannot be realized technically, the diagnosis on whether the connecting lines of each switch are normally connected can not be realized in an intelligent mode, and the use experience of a user is affected.
Disclosure of Invention
In order to solve the problem of communication of intelligent detection circuits of the whole vehicle, the utility model provides a switch circuit for detecting a backlight circuit.
The utility model provides a switch circuit for detecting a backlight line, which adopts the following technical scheme:
a switching circuit for detecting a backlight line, comprising:
the operation switch module is used for controlling the on-off of the corresponding device;
the backlight display module is used for controlling the on-off of the backlight display lamp;
the connecting module is used for connecting the operation switch module and the backlight display module in the same loop, one end of the connecting module is connected with the operation switch module, and the other end of the connecting module is connected with the backlight display module;
the detection module is used for judging the connection state of the operation switch module and the backlight display module and outputting corresponding detection signals, the input end of the detection module is connected with the input end of the operation switch module and used for collecting the connection information of the operation switch module and the backlight display module, and the detection module is used for outputting the corresponding detection signals after distinguishing and judging the collected connection information.
Through adopting above-mentioned technical scheme, can be with operation switch module and backlight display module connection in same return circuit through connecting module, detection module can gather the connection information of operation switch module and backlight display module together, and distinguish and judge the connection information who gathers the back, with corresponding detection signal transmission to the control terminal who is connected with detection module, thereby can be under the prerequisite that does not change whole car backlight, need not to design extra alone diagnosis module and detect backlight display module, can realize the joint diagnosis to operation switch module and backlight display module through detection module, the diagnosis object of detection module has been increased, cost when having reduced whole car intelligent detection.
Optionally, the detection module includes a detection resistor R1 connected to an input end of the operation switch module, and further includes a microprocessor MCU, where the microprocessor MCU is connected between the detection resistor R1 and the input end of the operation switch module, and the microprocessor MCU is used to collect a voltage signal at the end of the detection resistor R1.
Through adopting above-mentioned technical scheme, when needs are to be examined the connection state of operation switch module and backlight display module, only need through gathering the voltage of detection resistance R1 department to according to the voltage variation of detection resistance R1 department alright judge the connection state of operation switch and backlight display module, detect through MCU's mode, have low-power consumption, low voltage, the security is high, the commonality and advantage that the flexibility is excellent, simultaneously, but people utilize programming free control MCU to realize various control requirement, make it operate according to people's wish, holistic intelligent degree has been improved.
Optionally, the backlight display module includes a light emitting diode D1, and a backlight power unit for supplying power to the light emitting diode D1, where a current limiting resistor R5 is connected between the backlight power unit and an anode of the light emitting diode D1.
By adopting the technical scheme, the backlight power supply unit can supply power to the light emitting diode D1, so that the normal operation of the light emitting diode D1 is ensured; the current limiting resistor R5 can limit the power supply current of the backlight power supply unit, so that the light emitting diode D1 can be protected, and the damage of the light emitting diode D1 caused by overlarge current is reduced.
Optionally, the detection module is further configured to receive and identify a PWM signal sent by the backlight power supply unit.
By adopting the technical scheme, when the backlight display module and the wiring are normal, the PWM signal can be transmitted to the end of the operation switch module through the connection module under the drive of the backlight power supply unit, at the moment, the detection module can receive the PWM signal at the operation switch module and identify the on time of the high level and the low level of the backlight power supply unit, so that the backlight display module is judged to be normal in wiring, and the whole judgment mode is simple and clear; when the PWM duty ratio is regulated by a user according to the corresponding button on the vehicle, the backlight power supply unit supplies power according to the corresponding frequency, so that the detection voltage acquired by the detection module at the detection resistor R1 is a calibration value, and the accuracy in judging the wiring condition of the backlight display module is improved through the dual judgment standard of the voltage and the PWM signal.
Optionally, the connection module includes a triode Q1, a base electrode of the triode Q1 is connected to the backlight power supply unit, a collector electrode of the triode Q1 is connected to the operation switch module, and an emitter electrode of the triode Q1 is connected to the backlight display module.
By adopting the technical scheme, when the triode Q1 is conducted, the detection module can acquire the voltage value of the detection resistor R1 and the PWM signal sent by the backlight power supply unit, so that the judgment of the connection information of the connection position of the backlight display module and the operation switch module is improved through the judgment of the connection information of the voltage change of the end of the detection resistor R1 and the PWM signal; the triode Q1 is used for controlling the connection state of the operation switch module and the backlight display module, and has the advantages of high opening and closing speed, stable opening and closing, no jump phenomenon and long service life.
Optionally, the connection module includes a voltage dividing resistor R3 connected to the collector of the triode Q1, and the other end of the voltage dividing resistor R3 is connected to the detection resistor R1.
Through adopting above-mentioned technical scheme, through adjusting divider resistance R3's resistance, can make it and the operating switch not press the time with the parallelly connected resistance of operating switch present different resistance correlation effect, when triode Q1 base department received high level and switched on, divider resistance R3 will realize establishing ties with detection resistance R1 to play the bleeder effect to detection resistance R1, thereby can make detection module gather different resistance, and then realize the judgement to backlight display module and operating switch module connection information.
Optionally, the connection module further includes a protection resistor R4, and the protection resistor R4 is connected between the base of the triode Q1 and the backlight display module.
Through adopting above-mentioned technical scheme, protection resistance R4 plays the current limiting effect, and then can play the guard action to triode Q1 base department, has reduced triode Q1 because of the too big probability that takes place to damage of base department electric current, has ensured triode Q1's normal work.
Optionally, the method further comprises:
and the anode of the protection diode D2 is connected to the emitter of the triode Q1, and the cathode of the protection diode D2 is grounded.
Through adopting above-mentioned technical scheme, diode D2 plays the damping effect, prevents that triode Q1 during operation's peak-to-peak voltage from being too high to can play the guard action to triode Q1.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the intelligent detection system can realize the common diagnosis of the operation switch module and the backlight display module only through the detection module on the premise of not changing the backlight power supply of the whole vehicle, increases the diagnosis object of the detection module and reduces the cost during intelligent detection of the whole vehicle.
2. The diode D2 plays a damping role and prevents the peak voltage of the triode Q1 from being too high during working, so that the triode Q1 can be protected.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1 of the present utility model.
Reference numerals illustrate: 1. operating the switch module; 2. a backlight display module; 21. a backlight power supply unit; 3. a connection module; 4. and a detection module.
Detailed Description
The present utility model will be described in further detail with reference to fig. 1.
The embodiment of the utility model discloses a switch circuit for detecting a backlight circuit. Referring to fig. 1, the switch circuit for detecting a backlight circuit includes an operation switch module 1 for controlling on/off of a corresponding device, a backlight display module 2 for controlling on/off of a backlight display lamp, a connection module 3 electrically connected between the operation switch module 1 and the backlight display module 2, and the connection module 3 is used for connecting the operation switch module 1 and the backlight display module 2 in the same circuit.
Referring to fig. 1, the operation switch module 1 includes a normally open switch SW-1 and a resistor R2 connected in parallel with the normally open switch SW-1, one end of the normally open switch SW-1 is connected to the detection module 4, and the other end of the normally open switch SW-1 is grounded. The backlight display module 2 comprises a light emitting diode D1, a shunt resistor R6 connected in parallel with the light emitting diode D1, a backlight power supply unit 21 for supplying power to the light emitting diode D1, and a current limiting resistor R5 connected between the backlight power supply unit 21 and the anode of the light emitting diode D1, wherein the current limiting resistor R5 can perform a current limiting protection function on the light emitting diode D1, and prevent the light emitting diode D1 from being damaged due to overlarge current. The shunt resistor R6 can shunt current flowing through the light emitting diode D1, so that the shunt resistor R6 and the current limiting resistor R5 can perform double protection on the light emitting diode D1, and the service life of the light emitting diode D1 is prolonged.
Referring to fig. 1, the connection module 3 includes an NPN transistor Q1, a protection resistor R4 and a voltage dividing resistor R3, the protection resistor R4 is connected between a base of the NPN transistor Q1 and a current limiting resistor R5, the voltage dividing resistor R3 is connected between a collector of the NPN transistor Q1 and a resistor R2, and an emitter of the transistor Q1 is connected to the backlight display module 2. The protection resistor R4 plays a role in limiting current, so that the base electrode of the triode Q1 can be protected, the probability of damage to the triode Q1 caused by overlarge current at the base electrode is reduced, and the normal operation of the triode Q1 is ensured. The protection diode D2 is further included, the anode of the protection diode D2 is connected to the emitter of the triode Q1, the cathode of the protection diode D2 is grounded, the protection diode D2 can play a damping role on the triode Q1, and the probability of damage caused by overhigh peak-to-peak voltage during the working of the triode Q1 is reduced.
Referring to fig. 1, the backlight display device further includes a detection module 4, where the detection module 4 is configured to detect connection information between the operation switch module 1 and the backlight display module 2 and output a corresponding detection signal, and in this embodiment of the present utility model, the detection module 4 is connected to the operation switch module 1 through a switch detection signal line. The detection module 4 comprises a detection resistor R1 and a microprocessor MCU, wherein one end of the detection resistor R1 is connected with the normally open switch SW-1 through a switch detection signal line, and the other end of the detection resistor R1 is connected with the VPP inside the detection module 4. One end of the microprocessor MCU is connected between the detection resistor R1 and the normally open switch SW-1 and used for detecting a voltage signal of the end of the detection resistor R1, and the other end of the microprocessor MCU is connected with the backlight power supply unit 21 and used for PWM identification of the backlight power supply unit 21, so that the on time of the high level and the low level of the backlight power supply unit 21 can be identified.
Referring to fig. 1, when the connection between the detection module 4 and the operation switch module 1 is abnormal, the voltage detected by the microprocessor MCU is pulled up to 10V by the internal pull-up resistor; when the line connection of the normally open switch SW-1 is normally in a closed state, the detection module 4 detects a grounding signal, and the voltage value is approximately 0V; when the normally open switch SW-1 is in an off state, the resistor R2 is divided with the detection resistor R1, the voltage value detected by the detection module 4 is 8V, and at the moment, the normal connection of all lines of the operation switch can be diagnosed.
Referring to fig. 1, when the detection module 4 and the operation switch module 1 are normally connected, and the base electrode of the triode Q1 receives a high level and is turned on, the voltage dividing resistor R3 and the resistor R2 are connected in parallel and then are divided by the detection resistor R1, and if the detection module 4 receives the same PWM signal of the operation switch module 1 and the backlight display module 2, and the voltage value of the terminal of the detection resistor R1 is less than 8V, it can be diagnosed that both the operation switch module 1 and the backlight display module 2 are normally wired. When the user adjusts the PWM duty ratio according to the corresponding button on the vehicle, the backlight power unit 21 will supply power to the light emitting diode D1 according to the corresponding frequency, so that the detection voltage collected by the detection module 4 at the detection resistor R1 is a calibration value, and at this time, the accuracy in determining the wiring condition of the backlight display module 2 is improved by the dual determination criteria of the R1 terminal voltage and the PWM signal. In the embodiment of the utility model, when the duty ratio of the PWM signal is 100%, the voltage value detected by the detection module 4 is 5V, and when the duty ratio of the PWM signal is not 100%, the voltage value detected by the detection module 4 is between 5V and 8V, and at the moment, a user can perform double standard judgment through the PWM signal and the voltage value at the end of the detection resistor R1, thereby improving the accuracy of judging the wiring condition of the backlight display module 2.
The implementation principle of the switch circuit for detecting the backlight circuit in the embodiment of the utility model is as follows: when the intelligent detection of the connection state of the operation switch and the backlight display is needed, the operation switch module 1 and the backlight display module 2 are connected in the same loop through the connection module 3, and the detection module 4 is connected to the switch detection signal line on the operation switch module 1, so that the operation switch module 1 and the backlight display module 2 can be detected simultaneously through one detection module 4 and the same switch detection signal line, and the intelligent self-detection function of the automobile is improved without changing the backlight power supply of the whole automobile, and without designing an additional independent diagnosis module to diagnose the backlight display module 2.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. A switching circuit for detecting a backlight line, comprising:
the operation switch module (1) is used for controlling the on-off of the corresponding device;
a backlight display module (2) for controlling the on/off of the backlight display lamp;
the connecting module (3) is used for connecting the operation switch module (1) and the backlight display module (2) in the same loop, and the connecting module (3) is connected between the operation switch module (1) and the backlight display module (2);
the detection module (4) is used for judging the connection state of the operation switch module (1) and the backlight display module (2) and outputting corresponding detection signals, the input end of the detection module (4) is connected with the input end of the operation switch module (1) and is used for collecting the connection information of the operation switch module (1) and the backlight display module (2), and the detection module (4) distinguishes the collected connection information and outputs the corresponding detection signals after judgment.
2. A switching circuit for detecting a backlight as claimed in claim 1, wherein: the detection module (4) comprises a detection resistor R1 connected to the input end of the operation switch module (1), the detection module (4) further comprises a microprocessor MCU, the microprocessor MCU is connected between the detection resistor R1 and the input end of the operation switch module (1), and the microprocessor MCU is used for collecting voltage signals of the detection resistor R1.
3. A switching circuit for detecting a backlight as claimed in claim 2, wherein: the backlight display module (2) comprises a light emitting diode D1 and a backlight power supply unit (21) for supplying power to the light emitting diode D1, wherein a current limiting resistor R5 is connected between the backlight power supply unit (21) and the anode of the light emitting diode D1.
4. A switching circuit for detecting a backlight as claimed in claim 3, wherein: the detection module (4) is also used for receiving and identifying PWM signals sent by the backlight power supply unit (21).
5. The switching circuit for detecting a backlight as claimed in claim 4, wherein: the connecting module (3) comprises a triode Q1, wherein the base electrode of the triode Q1 is connected with the backlight power supply unit (21), the collector electrode of the triode Q1 is connected with the operation switch module (1), and the emitter electrode of the triode Q1 is connected with the backlight display module (2).
6. The switching circuit for detecting a backlight as claimed in claim 5, wherein: the connecting module (3) comprises a divider resistor R3 connected to the collector of the triode Q1, and the other end of the divider resistor R3 is connected to the detection resistor R1.
7. The switching circuit for detecting a backlight as claimed in claim 6, wherein: the connecting module (3) further comprises a protection resistor R4, and the protection resistor R4 is connected between the base electrode of the triode Q1 and the backlight display module (2).
8. The switching circuit for detecting a backlight as defined in claim 6, further comprising:
and the anode of the protection diode D2 is connected to the emitter of the triode Q1, and the cathode of the protection diode D2 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320451958.7U CN219512388U (en) | 2023-03-06 | 2023-03-06 | Switch circuit for detecting backlight circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320451958.7U CN219512388U (en) | 2023-03-06 | 2023-03-06 | Switch circuit for detecting backlight circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512388U true CN219512388U (en) | 2023-08-11 |
Family
ID=87547963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320451958.7U Active CN219512388U (en) | 2023-03-06 | 2023-03-06 | Switch circuit for detecting backlight circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219512388U (en) |
-
2023
- 2023-03-06 CN CN202320451958.7U patent/CN219512388U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2004009826A (en) | Lighting fixture apparatus for vehicle | |
| US20060046766A1 (en) | Method and system for bidirectional communications and power transmission | |
| CN219512388U (en) | Switch circuit for detecting backlight circuit | |
| CN1725270A (en) | Self-checking electric (electronic) line connecting practice device | |
| CN211478502U (en) | High-voltage interlocking detection circuit and vehicle comprising same | |
| GB2172456A (en) | A device for monitoring the operation of the lights circuit of a trailer of a commercial vehicle | |
| CN208619398U (en) | Air-conditioning between a kind of fan failure detection circuit and column | |
| CN101743674B (en) | Circuit arrangement for fault notification | |
| CN209987875U (en) | Power supply device of automotive electronic product for taking power from automobile wiper sensor | |
| CN106970282B (en) | ECU working state monitoring device and method of electric control diesel engine | |
| CN218055014U (en) | Automobile tail lamp control device and automobile | |
| CN220772227U (en) | Information display instrument for engineering machinery equipment | |
| CN106197837B (en) | A kind of vehicle engine oil pressure alarm system | |
| CN110890883A (en) | Conversion device and system for infrared photoelectric switch signals | |
| CN216598958U (en) | Sensor negative pole short-circuit protection circuit and vehicle | |
| CN213484559U (en) | Continuous power supply device for wireless remote control transmitting system | |
| CN212637256U (en) | Seat capable of detecting body temperature | |
| CN213780333U (en) | Automobile lamp detection circuit | |
| CN219554573U (en) | Overcurrent time-delay protection circuit | |
| CN113766410B (en) | Audio detection circuit, audio detection device and audio detection system | |
| CN215204657U (en) | Turn signal lamp fault diagnosis device and vehicle | |
| US11686778B1 (en) | Multifunctional battery health state detection device and system thereof | |
| CN215345183U (en) | Soft and hard two accuse of motormeter alarm lamp and mutual isolation protection circuit | |
| US9656681B2 (en) | Circuit arrangement for revealing light signal errors | |
| CN219369952U (en) | Detection circuit and power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |