CN204291477U - The Anti-surging dimming driving circuit of automobile instrument and backlight assembly - Google Patents
The Anti-surging dimming driving circuit of automobile instrument and backlight assembly Download PDFInfo
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- CN204291477U CN204291477U CN201420738640.8U CN201420738640U CN204291477U CN 204291477 U CN204291477 U CN 204291477U CN 201420738640 U CN201420738640 U CN 201420738640U CN 204291477 U CN204291477 U CN 204291477U
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Abstract
The utility model proposes the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, the first location hole and the first via hole is had all side by side once every fixing on journal stirrup, wherein the first location hole is positioned at the inner of lower fixing journal stirrup, housing is also provided with two circular the first grooves side by side, the middle part of described housing is recessed to form forward the second groove of rectangle and the stage portion of strip, backlight assembly comprises: anti-surge circuit, backlight conditioned circuit, expansion drive circuit of indicator, anti-surge circuit output connects backlight conditioned circuit power input and expansion drive circuit of indicator power input respectively, described expansion drive circuit of indicator signal output part connects backlight conditioned circuit signal input part.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly.
Background technology
In prior art, structure not for directly installing backlight assembly on automobile instrument outer casing, described backlight assembly is all directly installed in PCB combination, PCB combination is then installed in the enclosure, shell just has to the position of backlight assembly breach of stepping down, shell is also provided with screen board, screen board has LCD window, this LCD window is just to the LCD viewing area of backlight assembly.So, backlight assembly is by PCB integrated positioning, and screen board is then located by shell, because positioning datum is inconsistent, very easily causes the LCD viewing area on backlight assembly can not aim at completely with the LCD window on screen board.
Automobile instrument is resisting the ability of surge voltage in continuous decline, and the precision instrument in instrument is in surge voltage generating process, and constantly damage circuit and parts thereof, the safe and stable operation for automobile instrument causes serious impact;
Get more and more for the alarm lamp that vehicle-mounted automobile instrument shows, need the display unit of reporting to the police also to be more and more, the LED warning indication scheme controlled in orthodox car instrument alarm indication mode can not control all indicator lights simultaneously simultaneously;
Demand for automobile Presentation Function is also occurring to change, and people pursue diversified automobile and control to experience, especially to automobile instrument, having more than is simple display background light, especially for LCD backlight and the hornbook of automobile instrument, pointer brightness was in the past immobilize, inadequate hommization.
Utility model content
The utility model is intended at least solve the technical problem existed in prior art, especially innovatively proposes the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly.
In order to realize above-mentioned purpose of the present utility model, the utility model provides the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, comprise the housing 1 of strip, two lower fixing journal stirrups 6 be symmetrically arranged are connected with below at described housing 1, the first location hole 6a and the first via hole 6b is had all side by side once every fixing on journal stirrup 6, wherein the first location hole 6a is positioned at the inner of lower fixing journal stirrup 6, housing 1 is also provided with two circular the first grooves 2 side by side, its key is: the middle part of described housing 1 is recessed to form forward the second groove 4 of rectangle and the stage portion 5 of strip, described second groove 4 and stage portion 5 are between two the first grooves 2, wherein symmetrical the right and left being distributed in the second groove 4 of stage portion 5, the bottom surface of stage portion 5 is higher than the bottom surface of the second groove 4, stage portion 5 described in each all has the hole clipping 5a of upper and lower two rectangles, in described second groove 4, be provided with the backlight assembly 7 of rectangle, the right and left of described backlight assembly 7 is all connected with and hole clipping 5a buckle 7a one to one, and described buckle 7a buckles in corresponding hole clipping 5a,
Described housing 1 also has the light-conductive hole 3 of M rectangle, and described light-conductive hole 3 is arranged side by side in the top of the second groove 4, and described M is positive integer;
Described backlight assembly 7 comprises: anti-surge circuit, backlight conditioned circuit, expansion drive circuit of indicator,
Anti-surge circuit output connects backlight conditioned circuit power input and expansion drive circuit of indicator power input respectively, and described expansion drive circuit of indicator signal output part connects backlight conditioned circuit signal input part,
Anti-surge circuit comprises: the 4th diode, the second diode, the 6th electric capacity, the 9th electric capacity and an IC chip,
4th diode cathode connects buzzer drive circuit power input, integrated data display circuit power input, backlight conditioned circuit power input, expansion indicator light driving power input and cpu power input, described 4th diode cathode connects the second diode cathode, described second diode cathode connects the 6th electric capacity one end, the described 6th electric capacity other end connects an IC chip input, and a described IC chip output connects the 9th electric capacity other end described in the 9th electric capacity one end and connects an IC chip replacement delay end;
Expansion drive circuit of indicator comprises: power-supplying circuit, a MCU, LED drive circuit,
Described anti-surge circuit power output end connects a MCU feeder ear and LED drive circuit power input respectively, and described LED drive circuit output connects N number of LED alarm lamp, and described N is positive integer, and LED alarm lamp is placed in light-conductive hole (3) place;
Backlight conditioned circuit comprises: the 9th resistance, the tenth resistance, the 2nd MCU, the 13 resistance, the 14 resistance, drive circuit, the 5th transistor, hornbook backlight circuit, pointer backlight circuit, LCD lamp,
9th resistance one end connects adjustable pwm pulse signal end, the described 9th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 2nd MCU pulse signal input terminal, described 2nd MCU hornbook backlight signal output connects the 13 resistance one end, the described 13 resistance other end connects the 14 resistance one end and the 5th transistor drain respectively, the described 14 resistance other end connects the 5th transistor gate, described 5th transistor source connects hornbook backlight circuit, described 2nd MCU pointer backlight signal output connects drive circuit input, described drive circuit output connects LCD lamp and pointer backlight circuit respectively.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, described anti-surge circuit also comprises the 3rd booster diode D3, and described 3rd booster diode positive pole connects the second diode cathode, and described 3rd booster diode negative pole connects the second diode cathode.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, described pointer backlight circuit comprises: the 15 resistance, the 21 resistance, the 22 resistance, the 8th light-emitting diode, the 9th light-emitting diode,
Described 15 resistance one end connects drive circuit signal output part, the described 15 resistance other end connects the 8th light-emitting diode negative pole and the 21 resistance one end, described 8th light-emitting diode positive pole connects the 9th light-emitting diode negative pole and the 21 resistance other end respectively, the described 21 resistance other end also connects the 22 resistance one end, the described 22 resistance other end connects the 9th light-emitting diode positive pole, and described 9th light-emitting diode positive pole also connects power end.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, is equipped with limiting section 5b in hole clipping 5a described in each, described limiting section 5b be integrally connected to hole clipping 5a towards the second groove 4 middle part.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, four stud 4a of matrix distribution are provided with in the middle part of the bottom surface of described second groove 4, be provided with and stud 4a depressed part one to one at the back side of described backlight assembly 7, described stud 4a stretches in respective recesses portion.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, described LED drive circuit is two LED drive circuits in parallel, LED drive circuit signal input part after parallel connection connects a MCU signal output part, and the Lou output of opening of the LED drive circuit after parallel connection connects N number of LED alarm lamp.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
By arranging the second groove and stage portion on housing, stage portion offers hole clipping, direct for backlight assembly buckle is arranged in the second groove, make backlight assembly also fixing by shell location, the LCD viewing area be convenient on backlight assembly is aimed at more accurately with the LCD window on screen board, have be skillfully constructed, structure is simple, transformation easily and the feature such as improvement cost is low.
Anti-surge circuit relates to exquisiteness, and operation and maintenance is with low cost, easy to make, enhances productivity.
By connecting LED drive circuit, the light on and off realizing N paths of LEDs control, and control separately, expend the drawback of components and parts under breaching Legacy Status, thus realize MCU unified control LED light on and off by LED drive circuit.
Solve LCD backlight and the hornbook of automobile instrument, pointer brightness can regulate with the demand of user.User can carry out brightness regulation according to the demand of oneself to instrument backlight.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is automobile instrument outer casing and backlight assembly buzzer schematic diagram in prior art;
Fig. 2 is the Anti-surging dimming driving circuit buzzer schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 3 is the Anti-surging dimming driving circuit anti-surge circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 4 is the Anti-surging dimming driving circuit anti-static electricity interference device schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 5 is the Anti-surging dimming driving circuit anti-static electricity interference device cutaway view of the utility model automobile instrument and backlight assembly;
Fig. 6 is the Anti-surging dimming driving circuit anti-static electricity interference device automobile instrument back schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 7 is the Anti-surging dimming driving circuit integrated data display circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 8 is the Anti-surging dimming driving circuit integrated data display circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Fig. 9 is the Anti-surging dimming driving circuit integrated data display circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Figure 10 is the Anti-surging dimming driving circuit expansion indicator light circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Figure 11 is the Anti-surging dimming driving circuit expansion indicator light circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Figure 12 is the Anti-surging dimming driving circuit backlight conditioned circuit schematic diagram of the utility model automobile instrument and backlight assembly;
Figure 13 is backlight assembly schematic diagram in the Anti-surging dimming driving circuit of the utility model automobile instrument and backlight assembly;
Figure 14 is the body diagram of the Anti-surging dimming driving circuit of the utility model automobile instrument and backlight assembly;
Figure 15 is the housing schematic perspective view of the Anti-surging dimming driving circuit of the utility model automobile instrument and backlight assembly.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
As Figure 13, 14, shown in 15, the utility model provides the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, comprise the housing 1 of strip, two lower fixing journal stirrups 6 be symmetrically arranged are connected with below at described housing 1, the first location hole 6a and the first via hole 6b is had all side by side once every fixing on journal stirrup 6, wherein the first location hole 6a is positioned at the inner of lower fixing journal stirrup 6, housing 1 is also provided with two circular the first grooves 2 side by side, its key is: the middle part of described housing 1 is recessed to form forward the second groove 4 of rectangle and the stage portion 5 of strip, described second groove 4 and stage portion 5 are between two the first grooves 2, wherein symmetrical the right and left being distributed in the second groove 4 of stage portion 5, the bottom surface of stage portion 5 is higher than the bottom surface of the second groove 4, stage portion 5 described in each all has the hole clipping 5a of upper and lower two rectangles, in described second groove 4, be provided with the backlight assembly 7 of rectangle, the right and left of described backlight assembly 7 is all connected with and hole clipping 5a buckle 7a one to one, and described buckle 7a buckles in corresponding hole clipping 5a,
Described housing 1 also has the light-conductive hole 3 of M rectangle, and described light-conductive hole 3 is arranged side by side in the top of the second groove 4, and described M is positive integer;
Described backlight assembly 7 comprises: anti-surge circuit, buzzer drive circuit, integrated data display circuit, backlight conditioned circuit, expansion drive circuit of indicator and anti static device, CPU, related circuit wherein on backlight assembly is arranged on pcb board, and its arrangement is well known to those skilled in the art.
Anti-surge circuit output connects cpu power input respectively, buzzer drive circuit power input, integrated data display circuit power input, backlight conditioned circuit power input and expansion drive circuit of indicator power input, described integrated data display circuit signal output part connects backlight conditioned circuit signal input part, described integrated data display circuit buzzer signal output connects buzzer drive circuit signal input part, described integrated data display circuit indicator light signal output part connects expansion indicator light circuit signal input part, described expansion drive circuit of indicator signal output part connects backlight conditioned circuit signal input part,
The utility model provides the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, comprising buzzer drive circuit, and buzzer, the first diode, the 3rd resistance, the second electric capacity, transistor seconds, the 4th transistor,
Buzzer one end connects the first diode cathode, the described buzzer other end connects the first diode cathode, described first diode cathode also connects the 3rd resistance one end, described first diode cathode also connects the 3rd resistance other end, described 3rd resistance one end connects second electric capacity one end, the described 3rd resistance other end connects the second electric capacity other end, described first diode cathode connects the 4th transistor source, and described first diode cathode connects transistor seconds grid.
Described buzzer drive circuit, preferably, also comprises: the first transistor and the first resistance,
Described the first transistor source electrode connects first resistance one end and automobile instrument signal synthesis data display circuit buzzer signal input, and described first crystal tube grid connects transistor seconds drain electrode, and the described first resistance other end connects the first transistor drain electrode.
Described buzzer Drive and Control Circuit, preferably, also comprises: the second resistance and the first electric capacity,
Described second resistance one end connects first electric capacity one end, and the described second resistance other end connects ground connection after the first electric capacity other end, and described second resistance one end also connects first crystal tube grid.
Described buzzer Drive and Control Circuit, preferably, also comprises: the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity, third transistor,
3rd electric capacity one end connects automobile instrument anti-surge circuit power input and the 4th resistance one end respectively, the described 4th resistance other end connects the 5th resistance one end and third transistor drain electrode, described third transistor source electrode connects the 6th resistance one end, the described 6th resistance other end connects the first transistor drain electrode, the described 5th resistance other end connects the 3rd electric capacity other end, and the described 5th electric capacity other end also connects ground connection after third transistor grid.
Described buzzer Drive and Control Circuit, preferably, also comprises: the 4th transistor, the 7th resistance, the 8th resistance, the 4th electric capacity,
Described 4th transistor source connects the first diode cathode, described 4th transistor gate ground connection, described 4th transistor drain connects the 7th resistance one end and the 8th resistance one end, described 7th resistance other end ground connection, the described 8th resistance other end connects the 4th electric capacity one end, described 4th electric capacity other end ground connection.
Described ring device Drive and Control Circuit, preferably, also comprises: described 3rd resistance is adjustable resistance.
The change that Fig. 2 does on the basis of available circuit Fig. 1, this change makes charging accelerate, discharge slack-off, waveform declines fast from slowly rising, and becoming rises fast slowly declines, when making buzzer sounding, make sound clearer and more melodious very soon owing to rising during charging, electric discharge slowly makes last or end syllable elongated, sound is softer, and can allow and change the length of last or end syllable by the size changing resistance.
As shown in Figure 3, the utility model provides the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, wherein anti-surge circuit, and its key is, comprising: the 4th diode, the second diode, the 6th electric capacity, the 9th electric capacity and an IC chip,
4th diode cathode connects peripheral hardware, described 4th diode cathode connects the second diode cathode, described second diode cathode connects the 6th electric capacity one end, the described 6th electric capacity other end connects an IC chip input, and a described IC chip output connects the 9th electric capacity other end described in the 9th electric capacity one end and connects an IC chip replacement delay end.
The beneficial effect of technique scheme is: by the second diode and the 4th diode mating reaction, ensures automobile instrument steady operation, prevents surge voltage to the injury of automobile instrument.
Described anti-surge circuit, preferably, also comprises the 3rd booster diode D3, and described 3rd booster diode positive pole connects the second diode cathode, and described 3rd booster diode negative pole connects the second diode cathode.
The beneficial effect of technique scheme is: the 3rd booster diode plays the protective effect that auxiliary second diode carries out Anti-surging.
Described anti-surge circuit, preferably, also comprises the 7th electric capacity, and described 7th electric capacity one end connects an IC chip input, described 7th electric capacity other end ground connection.
Described anti-surge circuit, preferably, also comprises the 8th electric capacity, and described 8th electric capacity one end connects IC chip and resets delay end, and the described 8th electric capacity other end connects the 9th electric capacity other end.
Described anti-surge circuit, preferably, also comprises the 5th electric capacity, and described 5th electric capacity one end connects an IC chip output and automobile instrument peripheral hardware end, and the described 5th electric capacity other end connects the 9th electric capacity other end and automobile instrument peripheral hardware end.
Described anti-surge circuit, preferably, described second diode is ST70-27MF.
The beneficial effect of technique scheme is: anti-surge circuit cost is low, stable performance.
Described anti-surge circuit, preferably, described 3rd booster diode is TPC27A.
Described anti-surge circuit, preferably, described IC chip is TLE4275.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
Anti-surge circuit relates to exquisiteness, and operation and maintenance is with low cost, easy to make, enhances productivity.
As shown in Figure 4, the utility model provides the antistatic protection device of a kind of automobile instrument outer casing and backlight assembly, comprising: shading ring 11, liquid crystal display screen winding displacement connecting needle 12, automobile instrument earth terminal 13, wire 14, outside port 15, magnetic bead 10,
Shading ring 11 is looped around the pcb board surrounding of automobile instrument pcb board 16, described automobile instrument pcb board 16 winding displacement is connected on liquid crystal display screen winding displacement connecting needle 12, the electric charge that automobile instrument pcb board 16 winding displacement produces is shielded by shading ring 11, described shading ring 1 connects automobile instrument earth terminal 13, described outside port 15 connects automobile instrument earth terminal 13 by wire 14, and described shading ring 11 is connected with automobile instrument earth terminal 13 release carrying out electric charge by magnetic bead 10.
As shown in Figure 5, described antistatic protection device, preferably, also comprises single line pin 17,
Single line pin 17 one end connects automobile instrument earth terminal 13, and described single line pin 17 other end is by metallic clip held tight shading ring 11.
As shown in Figure 6, described antistatic protection device, preferably, also comprises: sealing ring 9,
Seal described sealing ring 9 along automobile instrument surrounding, automobile instrument inside middle portion installs automobile instrument pcb board 6, and pcb board 8 is installed at described automobile instrument back, described pcb board 8 surrounding suit shading ring 11.Wherein sealing ring not only can stop external dust, can also prevent liquid from flowing into the problem causing short circuit.
1, on liquid crystal display screen, shading ring is increased;
2, on automobile instrument main PCB, liquid crystal display screen implementation is encircled, and discharge outside electric charge by single-point grounding mode.
3, external charge delivery mode passes through one-point system.
As shown in Figure 7, the integrated data display circuit that the utility model provides a kind of automobile instrument outer casing and backlight assembly is comprise: geomagnetic sensor, baroceptor, GPS module, CPU,
Geomagnetic sensor signal output part connects CPU Geomagnetic signal input, described baroceptor signal output part connects CPU air pressure signal input, described GPS module signal output part connects the gps signal input of CPU, and LCD display device data signal input connects cpu data signal output part.
Preferably, described geomagnetic sensor and baroceptor comprise:
Geomagnetic sensor and baroceptor pass through I
2c communication bus is connected with CPU.
Described integrated data display circuit, preferably, described GPS module comprises:
Described GPS module is connected with CPU by serial communication bus.
As shown in Figure 8, preferably, described geomagnetic sensor also comprises: the 15th electric capacity, the 14th electric capacity, the 10th electric capacity, the 11st electric capacity, the 36th electric capacity, the 11st resistance;
Described 15th electric capacity, the 14th electric capacity are connected geomagnetic sensor power supply side and interface power feeder ear with the 36th Capacitance parallel connection one end, described 15th electric capacity, the 14th electric capacity and the 36th Capacitance parallel connection other end ground connection, described geomagnetic sensor magnetic reset cap end connects the 10th electric capacity one end, described 10th electric capacity other end ground connection, 11st resistance one end connects geomagnetic sensor and resets end, described 11st resistance other end ground connection, described geomagnetic sensor internal voltage regulator exports shunt capacitance link and connects the 11st electric capacity one end, described 11st electric capacity other end ground connection.
As shown in Figure 8, preferably, described baroceptor also comprises: the 24th resistance, the 25th resistance, the 12nd electric capacity, the 13rd resistance, the 37th electric capacity;
Described 24th resistance one end connects power voltage supply end, and the described 24th resistance other end connects baroceptor I
2c sequential clock end, described 25th resistance one end connects power voltage supply end, and the described 25th resistance other end connects baroceptor I
2c sequence data end, described 12nd electric capacity, the 13rd electric capacity, the 37th Capacitance parallel connection one end connect power voltage supply end and baroceptor feeder ear, described 12nd electric capacity, the 13rd electric capacity, the 37th Capacitance parallel connection other end ground connection.
As shown in Figure 9, described automobile instrument integral data presentation device, preferably, described GPS module comprises: the 16th resistance, the 17th resistance, the 33rd resistance, the 38th electric capacity, the 1st inductance;
Described 16th resistance one end connects automobile instrument Master Control Unit, the described 16th resistance other end connects GPS module data transmission terminal, described 17th resistance one end connects automobile instrument Master Control Unit, described 17th resistance other end connection data transmission ends, described 38th electric capacity one end connects the 33rd resistance one end and the 1st inductance one end, the described 38th electric capacity other end connects GPS module earth terminal, and the described 33rd resistance other end connects power voltage supply end.
Preferably, described CPU is MKL25Z128VFT4.
Preferably, described geomagnetic sensor is FXOS8700.
Preferably, described baroceptor is MPL3115A2.
Described automobile instrument integral data presentation device, preferably, described GPS module is MAX-7C.
Automobile instrument described in the utility model is except using the main control chip of conventional instrument, outside various sample circuit and information display circuit, add GPS module in addition, geomagnetic sensor, the functional modules such as baroceptor, the various sample circuits that instrument has still realize the function of traditional external information input main control chip, and information display circuit significantly rolls over vehicle condition Presentation Function, main control chip is except controlling sample circuit and display circuit, information also by reading each module newly increased obtains the current GPS information of automobile, the Geomagnetism Information of automobile position and atmospheric pressure information displaying are to user.
CPU is ATMEGA16L.
The beneficial effects of the utility model are: after adding extra transducer, make orthodox car instrument provide more information and function, enable driver obtain the real time information of more automobile present position, help driver to judge current state.
As shown in Figure 10, the utility model provides the Anti-surging dimming driving circuit of a kind of automobile instrument and backlight assembly, and wherein New LED expansion indicator light circuit is comprise: power-supplying circuit, a MCU, LED drive circuit,
Described power-supplying circuit power output end connects a MCU feeder ear and LED drive circuit power input respectively, and described LED drive circuit output connects N number of LED alarm lamp, and described N is positive integer.
Preferably, described LED drive circuit is two LED drive circuits in parallel, and the LED drive circuit signal input part after parallel connection connects a MCU signal output part, and the Lou output of opening of the LED drive circuit after parallel connection connects N number of LED alarm lamp.
As shown in figure 11, preferably, described LED drive circuit is TLC6C5912.
Preferably, also comprise the 111st resistance, described 111st resistance one end connects the power input of power-supplying circuit, and the described 111st resistance other end connects LED drive circuit power input.
Preferably, described LED alarm lamp positive pole connects power supply circuits, and described LED alarm lamp negative pole connects LED drive circuit signal output part.
The beneficial effects of the utility model are:
By connecting LED drive circuit, the light on and off realizing N paths of LEDs control, and control separately, expend the drawback of components and parts under breaching Legacy Status, thus realize a MCU unified control LED light on and off by LED drive circuit.LED drive circuit is TLC6C5912.Solve the phenomenon that may occur flicker at automotive ignition moment LED.
One MCU is by a kind of serial shift communication modes control LED drive IC internal logic, the logic level that internal logic circuit sends according to a MCU carries out light on and off control to 24 paths of LEDs, realize LED warning instruction, wherein a MCU controls the customary means that LED light on and off belong to this area.
As shown in figure 12, the utility model automobile instrument outer casing and backlight assembly brightness conditioned circuit, its key is, comprise: the 9th resistance, the tenth resistance, the 2nd MCU, the 13 resistance, the 14 resistance, drive circuit, the 5th transistor, hornbook backlight circuit, pointer backlight circuit, LCD lamp
9th resistance one end connects adjustable pwm pulse signal end, the described 9th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 2nd MCU pulse signal input terminal, described 2nd MCU hornbook backlight signal output connects the 13 resistance one end, the described 13 resistance other end connects the 14 resistance one end and the 5th transistor drain respectively, the described 14 resistance other end connects the 5th transistor gate, described 5th transistor source connects hornbook backlight circuit, described 2nd MCU pointer backlight signal output connects drive circuit input, described drive circuit output connects LCD lamp and pointer backlight circuit respectively.
The beneficial effect of technique scheme is: regulated hornbook backlight and pointer backlight by pwm pulse signal.
Described hornbook backlight circuit comprises: the 18 resistance, the 19 resistance, the 20 resistance, the 6th light-emitting diode, the 7th light-emitting diode,
18 resistance one end connects the first transistor source electrode, the described 18 resistance other end connects the 6th light-emitting diode negative pole and the 19 resistance one end respectively, described 6th light-emitting diode positive pole connects the 7th light-emitting diode negative pole and the 19 resistance other end, the described 19 resistance other end also connects the 20 resistance one end, the described 20 resistance other end connects the 7th light-emitting diode positive pole, and described 7th light-emitting diode positive pole connects power end.
The beneficial effect of technique scheme is: hornbook backlight circuit is reasonable in design, and circuit working is stablized.
Described pointer backlight circuit comprises: the 15 resistance, the 21 resistance, the 22 resistance, the 8th light-emitting diode, the 9th light-emitting diode,
Described 15 resistance one end connects drive circuit signal output part, the described 15 resistance other end connects the 8th light-emitting diode negative pole and the 21 resistance one end, described 8th light-emitting diode positive pole connects the 9th light-emitting diode negative pole and the 21 resistance other end respectively, the described 21 resistance other end also connects the 22 resistance one end, the described 22 resistance other end connects the 9th light-emitting diode positive pole, and described 9th light-emitting diode positive pole also connects power end.
The beneficial effect of technique scheme is: pointer backlight circuit is reasonable in design, and circuit working is stablized.
Preferably, described drive circuit is ULQ2003A.
Instrumentation tap gathers the PWM dim signal of low frequency, dividing potential drop is carried out to the voltage signal being applicable to the 2nd MCU collection by two resistance, then the 2nd MCU is changed by the voltage signal gathered, export three tunnels independently pwm signal carry out hornbook through amplifier respectively, pointer, LCD backlight illumination regulable control.An input small capacitances in parallel, form a RC low pass filter, the high frequency spurs signal beyond rejection frequency, the algorithm making the 2nd MCU need not open self carries out filtering, alleviates burden; Input adds a voltage-stabiliser tube, provides stable collection signal to single-chip microcomputer, can not by the interference of extraneous voltage fluctuation, and the I/O port of protection the 2nd MCU is not by excessive pressure damages.
Solve LCD backlight and the hornbook of automobile instrument, pointer brightness can regulate with the demand of user.User can carry out brightness regulation according to the demand of oneself to automobile instrument backlight.
Figure 13 is the utility model backlight assembly general illustration.Comprising: anti-surge circuit, buzzer drive circuit, integrated data display circuit, backlight conditioned circuit, expansion indicator light circuit and anti static device,
Anti-surge circuit output connects buzzer drive circuit power input respectively, integrated data display circuit power input and expansion indicator light circuit power input, described integrated data display circuit signal output part connects backlight conditioned circuit signal input part, described integrated data display circuit buzzer signal output connects buzzer drive circuit signal input part, described integrated data display circuit indicator light signal output part connects expansion indicator light circuit signal input part, described expansion indicator light circuit signal output part connects backlight conditioned circuit signal input part,
Described anti-surge circuit, buzzer drive circuit, integrated data display circuit, backlight conditioned circuit, expansion indicator light circuit are arranged on the pcb board at automobile instrument back, around anti static device around pcb board winding displacement, for preventing electromagnetic interference.
As shown in Figure 14,15, the Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, is equipped with limiting section 5b in hole clipping 5a described in each, described limiting section 5b be integrally connected to hole clipping 5a towards the second groove 4 middle part.
The Anti-surging dimming driving circuit of described automobile instrument and backlight assembly, preferably, be provided with four stud 4a of matrix distribution in the middle part of the bottom surface of described second groove 4, be provided with and stud 4a depressed part one to one at the back side of described backlight assembly 7, described stud 4a stretches in respective recesses portion.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (7)
1. the Anti-surging dimming driving circuit of an automobile instrument and backlight assembly, comprise the housing (1) of strip, two lower fixing journal stirrups (6) be symmetrically arranged are connected with below at described housing (1), the first location hole (6a) and the first via hole (6b) is had all side by side once every fixing on journal stirrup (6), wherein the first location hole (6a) is positioned at the inner of lower fixing journal stirrup (6), housing (1) is also provided with two circular the first grooves (2) side by side, it is characterized in that: the middle part of described housing (1) is recessed to form forward second groove (4) of rectangle and the stage portion (5) of strip, described second groove (4) and stage portion (5) are positioned between two the first grooves (2), wherein symmetrical the right and left being distributed in the second groove (4) of stage portion (5), the bottom surface of stage portion (5) is higher than the bottom surface of the second groove (4), stage portion (5) described in each all has the hole clipping (5a) of upper and lower two rectangles, the backlight assembly (7) of rectangle is installed in described second groove (4), the right and left of described backlight assembly (7) is all connected with and hole clipping (5a) buckle (7a) one to one, and described buckle (7a) buckles in corresponding hole clipping (5a),
Described housing (1) also has the light-conductive hole (3) of M rectangle, and described light-conductive hole (3) is arranged side by side in the top of the second groove (4), and described M is positive integer;
Described backlight assembly (7) comprising: anti-surge circuit, backlight conditioned circuit, expansion drive circuit of indicator,
Anti-surge circuit output connects backlight conditioned circuit power input and expansion drive circuit of indicator power input respectively, and described expansion drive circuit of indicator signal output part connects backlight conditioned circuit signal input part,
Anti-surge circuit comprises: the 4th diode, the second diode, the 6th electric capacity, the 9th electric capacity and an IC chip,
4th diode cathode connects buzzer drive circuit power input, integrated data display circuit power input, backlight conditioned circuit power input, expansion indicator light driving power input and cpu power input, described 4th diode cathode connects the second diode cathode, described second diode cathode connects the 6th electric capacity one end, the described 6th electric capacity other end connects an IC chip input, and a described IC chip output connects the 9th electric capacity other end described in the 9th electric capacity one end and connects an IC chip replacement delay end;
Expansion drive circuit of indicator comprises: power-supplying circuit, a MCU, LED drive circuit,
Described anti-surge circuit power output end connects a MCU feeder ear and LED drive circuit power input respectively, and described LED drive circuit output connects N number of LED alarm lamp, and described N is positive integer, and LED alarm lamp is placed in light-conductive hole (3) place;
Backlight conditioned circuit comprises: the 9th resistance, the tenth resistance, the 2nd MCU, the 13 resistance, the 14 resistance, drive circuit, the 5th transistor, hornbook backlight circuit, pointer backlight circuit, LCD lamp,
9th resistance one end connects adjustable pwm pulse signal end, the described 9th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 2nd MCU pulse signal input terminal, described 2nd MCU hornbook backlight signal output connects the 13 resistance one end, the described 13 resistance other end connects the 14 resistance one end and the 5th transistor drain respectively, the described 14 resistance other end connects the 5th transistor gate, described 5th transistor source connects hornbook backlight circuit, described 2nd MCU pointer backlight signal output connects drive circuit input, described drive circuit output connects LCD lamp and pointer backlight circuit respectively.
2. the Anti-surging dimming driving circuit of automobile instrument according to claim 1 and backlight assembly, it is characterized in that, described anti-surge circuit also comprises the 3rd booster diode (D3), described 3rd booster diode positive pole connects the second diode cathode, and described 3rd booster diode negative pole connects the second diode cathode.
3. the Anti-surging dimming driving circuit of automobile instrument according to claim 1 and backlight assembly, it is characterized in that, described hornbook backlight circuit comprises: the 18 resistance, the 19 resistance, the 20 resistance, the 6th light-emitting diode, the 7th light-emitting diode
18 resistance one end connects the first transistor source electrode, the described 18 resistance other end connects the 6th light-emitting diode negative pole and the 19 resistance one end respectively, described 6th light-emitting diode positive pole connects the 7th light-emitting diode negative pole and the 19 resistance other end, the described 19 resistance other end also connects the 20 resistance one end, the described 20 resistance other end connects the 7th light-emitting diode positive pole, and described 7th light-emitting diode positive pole connects power end.
4. the Anti-surging dimming driving circuit of automobile instrument according to claim 1 and backlight assembly, it is characterized in that, described pointer backlight circuit comprises: the 15 resistance, the 21 resistance, the 22 resistance, the 8th light-emitting diode, the 9th light-emitting diode
Described 15 resistance one end connects drive circuit signal output part, the described 15 resistance other end connects the 8th light-emitting diode negative pole and the 21 resistance one end, described 8th light-emitting diode positive pole connects the 9th light-emitting diode negative pole and the 21 resistance other end respectively, the described 21 resistance other end also connects the 22 resistance one end, the described 22 resistance other end connects the 9th light-emitting diode positive pole, and described 9th light-emitting diode positive pole also connects power end.
5. the Anti-surging dimming driving circuit of automobile instrument according to claim 1 and backlight assembly, it is characterized in that, be equipped with limiting section (5b) in hole clipping (5a) described in each, described limiting section (5b) be integrally connected to hole clipping (5a) towards the second groove (4) middle part.
6. the Anti-surging dimming driving circuit of automobile instrument and backlight assembly according to claim 1 or 5, it is characterized in that, four studs (4a) of matrix distribution are provided with in the middle part of the bottom surface of described second groove (4), be provided with and stud (4a) depressed part one to one at the back side of described backlight assembly (7), described stud (4a) stretches in respective recesses portion.
7. the Anti-surging dimming driving circuit of automobile instrument according to claim 1 and backlight assembly, it is characterized in that: described LED drive circuit is two LED drive circuits in parallel, LED drive circuit signal input part after parallel connection connects MCU signal output part, and the Lou output of opening of the LED drive circuit after parallel connection connects N number of LED alarm lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420738640.8U CN204291477U (en) | 2014-11-28 | 2014-11-28 | The Anti-surging dimming driving circuit of automobile instrument and backlight assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420738640.8U CN204291477U (en) | 2014-11-28 | 2014-11-28 | The Anti-surging dimming driving circuit of automobile instrument and backlight assembly |
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| CN204291477U true CN204291477U (en) | 2015-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867193A (en) * | 2020-05-28 | 2020-10-30 | 东风电驱动系统有限公司 | Brightness self-adaption device for instrument alarm indicator lamp |
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2014
- 2014-11-28 CN CN201420738640.8U patent/CN204291477U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867193A (en) * | 2020-05-28 | 2020-10-30 | 东风电驱动系统有限公司 | Brightness self-adaption device for instrument alarm indicator lamp |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150422 Termination date: 20171128 |