CN204291474U - LED illumination drive unit and the vehicle with this drive unit - Google Patents
LED illumination drive unit and the vehicle with this drive unit Download PDFInfo
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- CN204291474U CN204291474U CN201420734078.1U CN201420734078U CN204291474U CN 204291474 U CN204291474 U CN 204291474U CN 201420734078 U CN201420734078 U CN 201420734078U CN 204291474 U CN204291474 U CN 204291474U
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- 238000005286 illumination Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 description 7
- 230000005669 field effect Effects 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 101100102627 Oscarella pearsei VIN1 gene Proteins 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The utility model proposes a kind of LED illumination drive unit and the vehicle with this drive unit.Wherein, this device comprises: LED; First brilliance control end and the second brilliance control end; The first end of transistor is connected with the second brilliance control end with the first brilliance control end respectively; The first end detecting resistance is connected with LED, the second end ground connection, detects resistance for detecting the output current of LED; The first input end of adjusting module is connected with the second end with the first end detecting resistance respectively with the second input, the output of adjusting module is connected with the control end of transistor, and the output current that adjusting module is used for according to detecting resistance detection adjusts transistor; And the input of control module is connected with the second brilliance control end, the output of control module is connected with the control end detecting resistance, and control module adjusts the resistance detecting resistance according to the control signal of the second brilliance control end.The device of the utility model embodiment, structure is simple, and cost is lower, the better effects if of constant current.
Description
Technical field
The utility model relates to field of automobile, particularly relates to a kind of LED illumination drive unit and the vehicle with this drive unit.
Background technology
At present, conventional automobile-used LED illumination driving circuit has the driving of resistance current limliting, constant voltage driving and constant current driving etc.Wherein, it is type of drive ideal at present that switching mode constant current drives, its cardinal principle detects the voltage signal relevant to LED by testing circuit, compare with reference voltage, relevant switching signal is produced again by control circuit, make the field effect transistor conducting that joins with LED strip or shutoff, thus realize the break-make of electric current on control LED.In order to ensure LED constant current precision and circuit working efficiency, in drive circuit, corresponding energy-storage travelling wave tube and fly-wheel diode can be increased.
But current Problems existing is, the mode that existing switching mode constant current drives needs to use the peripheral structure such as special control chip and inductance capacitance, and circuit is more complicated, and cost is higher.If do not use special control chip, produce switching signal only according to switch element, then switching frequency can be very low, and switching delay time is longer, is difficult to ensure LED constant current precision.In addition, always there is switching signal in switching mode constant-current drive circuit, can produce certain High-frequency Interference, easily cause electromagnetic compatibility problem, can cause interference to mobile unit, serious even causes breaking-up to mobile unit.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, first object of the present utility model is to propose a kind of LED illumination drive unit, and this LED illumination drive unit has the following advantages: 1, without the need to devices such as special control chip, inductance capacitance and fly-wheel diodes, and structure is simple, and cost is lower; 2, the mode that resistance current limliting and linear constant current drive is combined, make use of the Linear Amplifer characteristic of transistor, make in drive circuit, all to use analog quantity to regulate, if the input of power supply is stablized, then produce output ripple hardly, the better effects if of constant current, under the prerequisite ensureing reference voltage precision, the constant current accuracy of LED also improves greatly; 3, combine the mode that resistance current limliting and linear constant current drive, add the fail safe of drive circuit, be applicable to the LED of relatively high power, breach the limitation that simple linear constant current drive mode can only drive small-signal lamp to throw light on; 4, in drive circuit without any switching node, EMC (Electromagnetic Compatibility, Electro Magnetic Compatibility) problem can not be caused.
For reaching above-mentioned purpose, the utility model first aspect embodiment proposes a kind of LED illumination drive unit, comprising: LED; First brilliance control end and the second brilliance control end; Transistor, the first end of described transistor is connected with described second brilliance control end with described first brilliance control end respectively, and the second end of described transistor is connected with described LED; Detect resistance, the first end of described detection resistance is connected with described LED, the second end ground connection of described detection resistance, and described detection resistance is for detecting the output current of described LED; Adjusting module, the first input end of described adjusting module is connected with the second end with the first end of described detection resistance respectively with the second input, the output of described adjusting module is connected with the control end of described transistor, and described adjusting module is used for adjusting described transistor according to the output current of described detection resistance detection; And control module, the input of described control module is connected with described second brilliance control end, the output of described control module is connected with the control end of described detection resistance, and described control module adjusts according to the resistance of control signal to described detection resistance of described second brilliance control end.
The LED illumination drive unit of the utility model embodiment, has the following advantages: 1, without the need to devices such as special control chip, inductance capacitance and fly-wheel diodes, and structure is simple, and cost is lower; 2, the mode that resistance current limliting and linear constant current drive is combined, make use of the Linear Amplifer characteristic of transistor, make in drive circuit, all to use analog quantity to regulate, if the input of power supply is stablized, then produce output ripple hardly, the better effects if of constant current, under the prerequisite ensureing reference voltage precision, the constant current accuracy of LED also improves greatly; 3, combine the mode that resistance current limliting and linear constant current drive, add the fail safe of drive circuit, be applicable to the LED of relatively high power, breach the limitation that simple linear constant current drive mode can only drive small-signal lamp to throw light on; 4, in drive circuit without any switching node, EMC (ElectromagneticCompatibility, Electro Magnetic Compatibility) problem can not be caused.
For reaching above-mentioned purpose, the utility model second aspect embodiment proposes a kind of vehicle, comprises the LED illumination drive unit described in the utility model first aspect embodiment.
The vehicle of the utility model embodiment, has the following advantages: 1, without the need to devices such as special control chip, inductance capacitance and fly-wheel diodes, and structure is simple, and cost is lower; 2, the mode that resistance current limliting and linear constant current drive is combined, make use of the Linear Amplifer characteristic of transistor, make in drive circuit, all to use analog quantity to regulate, if the input of power supply is stablized, then a few family can not produce output ripple, the better effects if of constant current, under the prerequisite ensureing reference voltage precision, the constant current accuracy of LED also improves greatly; 3, combine the mode that resistance current limliting and linear constant current drive, add the fail safe of drive circuit, be applicable to the LED of relatively high power, breach the limitation that simple linear constant current drive mode can only drive small-signal lamp to throw light on; 4, in drive circuit without any switching node, EMC (Electromagnetic Compatibility, Electro Magnetic Compatibility) problem can not be caused.
The aspect that the utility model is additional 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
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural representation of the LED illumination drive unit of the utility model embodiment; And
Fig. 2 is the circuit diagram that the LED illumination drive unit of the utility model embodiment is applied on fork-truck steering lamp.
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.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of preferred implementation of the present utility model comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiment person of ordinary skill in the field of the present utility model.
Fig. 1 is the structural representation of the LED illumination drive unit of the utility model embodiment, and Fig. 2 is the circuit diagram that the LED illumination drive unit of the utility model embodiment is applied on fork-truck steering lamp.
As shown in Figure 1, LED illumination drive unit comprises LED10, the first brilliance control end 20, second brilliance control end 30, transistor 40, detects resistance 50, adjusting module 60, control module 70, vent diverter 80, first diode 90, second diode 100 and the 3rd diode 110.Wherein, adjusting module 60 specifically comprises error amplifier 61 and current amplifier 62.
Particularly, in an embodiment of the present utility model, when second brilliance control end 30 is triggered, the brightness of LED10 is greater than the brightness of LED10 when the first brilliance control end 20 is triggered, that is, second brilliance control end 30 control LED10 is at highlighted state, and the first brilliance control end 20 control LED10 is in normal brightness state.The first end of transistor 40 is connected with the second brilliance control end 30 with the first brilliance control end 20 respectively, and the second end of transistor 40 is connected with LED10, and wherein, transistor 40 is operated in linear zone.The first end detecting resistance 50 is connected with LED10, detects the second end ground connection of resistance 50, detects resistance 50 for detecting the output current of LED10.The first input end of adjusting module 60 is connected with the second end with the first end detecting resistance 50 respectively with the second input, the output of adjusting module 60 is connected with the control end of transistor 40, and adjusting module 60 is for adjusting transistor 40 according to the output current detecting resistance 50 detection.The input of control module 70 is connected with the second brilliance control end 30, and the output of control module 70 is connected with the control end detecting resistance 50, and control module 70 adjusts the resistance detecting resistance 50 according to the control signal of the second brilliance control end 30.
In an embodiment of the present utility model, LED illumination drive unit also comprises vent diverter 80, and vent diverter 80 is in parallel with transistor 40, and wherein, vent diverter 80 can be resistance.
In an embodiment of the present utility model, LED illumination drive unit also comprises the first diode 90, second diode 100 and the 3rd diode 110.Specifically, the anode of the first diode 90 is connected with the first brilliance control end 20, and the negative electrode of the first diode 90 is connected with the first end of transistor 40.The anode of the second diode 100 is connected with the second brilliance control end 30, and the negative electrode of the second diode 100 is connected with the first end of transistor 40.The anode of the 3rd diode 110 is connected with the second brilliance control end 30, and the negative electrode of the 3rd diode 110 is connected with the input of control module 70.
In an embodiment of the present utility model, adjusting module 60 specifically comprises error amplifier 61 and current amplifier 62.Specifically, the first input end of error amplifier 61 is connected with the first end detecting resistance 50, and the second input of error amplifier 61 is connected with preset reference voltage.The input of current amplifier 62 is connected with the output of error amplifier 61, and the output of current amplifier 62 is connected with the control end of transistor 40.
Specifically, as shown in Figure 1, the LED illumination drive unit of the utility model embodiment combines and have employed resistance current limliting and linear constant current two kinds of type of drive, first brilliance control end 20 (VIN1 end) is input as normal brightness, second brilliance control end 30 (VIN2 end) is input as highlighted state, and LED10 shares a drive circuit under normal brightness and highlighted state.
The main road of VIN1 end is in series by the first diode 90, the transistor 40 being operated in linear zone, LED10 and detection resistance 50.A vent diverter 80 in parallel on transistor 40, wherein, this vent diverter 80 can be the resistance of a fixed resistance value, also can be the element that other can be shunted.
VIN1 holds the periphery of main road to comprise a reference voltage and adjusting module 60, and wherein, adjusting module 60 comprises error amplifier 61 and current amplifier 62.That is, the resistance detecting resistance 50 is R, is sampled, obtain the current value I sampled by the electric current detected on resistance 50 couples of LED10.Obtain the voltage signal V detecting resistance 50 after sampling
sNS, wherein voltage signal V
sNSbe V with the pass of the current value I of LED10
sNS=I*R, then by voltage signal V
sNSbe input to same reference voltage V in error amplifier 61
rEFcompare, the output voltage of error amplifier 61 drives the transistor 40 of connecting with current amplifier 62 again through current amplifier 62.In other words, transistor 40 is equivalent to a variable resistor, when the current value I of output voltage change or LED10 changes, detects the voltage signal V on resistance 50
sNSalso change, adjusting module 60 can adjust the base voltage of the transistor 40 of connecting with adjusting module 60 thereupon, makes its equivalence detect the change in resistance of resistance 50, then keeps the sampled voltage signal V detecting resistance 50
sNSequal reference voltage V
rEF, ensure that the current value I linearity constant (I=V of LED10
rEF/ R).
Vent diverter 80 is connected in parallel on transistor 40, the Main Function of vent diverter 80 is shunting and current limliting, if vent diverter 80 is the resistance of fixed resistance value, the current value of shunting equals the resistance of voltage divided by vent diverter 80 at transistor 40 two ends, the power consumption of transistor 40 can be reduced by shunting, make transistor 40 can meet the driving demand of the LED10 of higher-wattage without the need to radiator.In addition, vent diverter 80 also for when linear constant current partial circuit operation irregularity, limits the current value I of LED10, thus avoids LED10 to be burnt.
VIN2 end is connected with transistor 40 by the second diode 100, and hold with VIN1 and share a drive circuit, wherein, the second diode 100 plays the effect of Isolation input.VIN2 end is connected with control module 70 by the 3rd diode 110, when drive unit powers on, control module 70 by the conducting of control switch pipe, detect resistance 50 two ends parallel connection on resistance, be equivalent to the resistance R reducing to detect resistance 50, thus change the current value I of LED10.In other words, due to I=V
rEF/ R, reference voltage V
rEFbe constant, along with the resistance R detecting resistance 50 reduces, the current value I of LED10 can become large.
Fig. 2 is the physical circuit figure that the LED illumination drive unit in the utility model embodiment is applied on fork-truck steering lamp, elaborates the LED illumination drive unit of the utility model embodiment referring to Fig. 2.
Specifically, in order to simplify application, have employed the 500mA linear constant current driving chip TL4242 of Texas Instrument, the reference voltage of integrated transistor (positive-negative-positive), 177mV, error amplifier, current amplifier (small-signal NPN triode) and other circuit in this driving chip TL4242.
The drive circuit of direction indicator lamp connects as follows: 12V on-vehicle battery voltage is through rectifier diode D
1be connected to the self-recoverage insurance F of a 750mA
1be connected on the 8th pin of driving chip TL4242 again, that is, the emitter of PNP transistor, collector electrode (the 6th pin of driving chip TL4242) are connected to the positive pole of LED, the resistance R that an emitter resistance in parallel with collector electrode two ends of PNP transistor is 150 Ω, power is 2W
3, LED negative pole is connected to the detection resistance R of 1.8 Ω
1, detect resistance R
1the other end be connected to the negative pole of on-vehicle battery.
By the detection resistance R that will sample
1voltage be input to the error amplifier of driving chip TL4242 inside, and compare with the reference voltage of 177mV, the output of error amplifier is connected to the base stage of current amplifier (small-signal NPN triode), the collector electrode of current amplifier connects the base stage of transistor (positive-negative-positive), transmitter is connected to the negative pole of battery, and the voltage signal that error amplifier exports is through current amplifier driving transistors.
TVS
1for bilateral transient voltage suppression diode, for absorbing the vehicle-mounted electrical surge on power line.Electric capacity C
1play filter action.The current value I=V of LED
rEF/ R
1=177mV/1.8 Ω=98mA, equals to flow through R
3electric current and the electric current sum of transistor, under the LED electrical flow valuve I of 98mA, the both end voltage of LED is about 6.6V.When the voltage rise of battery or the electric current of LED rise, detect resistance R
1on voltage also along with rising, that is, be greater than 177mV, drive circuit makes the voltage drop of transistor base, makes the resistance of its equivalence strengthen simultaneously, and the voltage of the output made reduces, thus keeps detecting resistance R
1on voltage be 177mV, ensure that the electric current of LED is 98mA.
Danger light is by rectifier diode D
2with direction indicator lamp common drive circuit, simultaneously by rectifier diode D
3the input of brilliance control end is connected to the resistance R of 470 Ω
4, then be connected to 5.6V voltage stabilizing didoe D
4negative pole, voltage stabilizing didoe D
4positive pole connect the negative pole of battery, voltage stabilizing didoe D
4the resistance of upper 30K Ω ~ 100K Ω in parallel plays the effect of protection, voltage stabilizing didoe D
4negative pole be connected to N-type field effect transistor Q simultaneously
1(field effect transistor Q
1model be 2N7002) grid, field effect transistor Q
1drain electrode and source electrode connect respectively and detect resistance R
1two ends.When danger light is opened, drive circuit works, 12V cell voltage is by resistance R simultaneously
4to voltage stabilizing didoe D
4, voltage stabilizing didoe D
4work, makes field effect transistor Q
1grid voltage be stabilized on 5.6V, make field effect transistor Q
1drain electrode and source conduction, conducting resistance be 2 Ω and with detection resistance R
1in parallel work detects resistance, makes LED current I=177mV/ (1.8 Ω // 2 Ω)=169mA.
Table 1-table 4 is driving chip TL4242 parallel resistance R respectively
3with not parallel resistance R
3time, the theoretical junction temperature of driving chip TL4242 when drive circuit works at fixed environment temperature.Obviously, driving chip TL4242 parallel resistance R
3the junction temperature of rear drive chip TL4242 becomes lower, and drive circuit at high temperature works more safe and reliable.
Table 1 is the design parameter of direction indicator lamp drive circuit
Table 2 is the design parameter of danger signal lamp drive circuit
Table 3 is driving chip TL4242 not parallel resistance R
3time direction indicator lamp driving parameter
Table 4 is driving chip TL4242 not parallel resistance R
3time danger light driving parameter
Therefore, can find out, if the two poles of the earth of transistor not parallel resistance R
3, then the junction temperature of driving chip TL4242 can raise, and particularly when cell voltage raises, the power consumption of driving chip TL4242 increases, and junction temperature raises, and can cause the damage of driving chip TL4242.
The LED illumination drive unit of the utility model embodiment, has the following advantages:
1, without the need to devices such as special control chip, inductance capacitance and fly-wheel diodes, structure is simple, and cost is lower;
2, the mode that resistance current limliting and linear constant current drive is combined, make use of the Linear Amplifer characteristic of transistor, make in drive circuit, all to use analog quantity to regulate, if the input of power supply is stablized, then a few family can not produce output ripple, the better effects if of constant current, under the prerequisite ensureing reference voltage precision, the constant current accuracy of LED also improves greatly;
3, combine the mode that resistance current limliting and linear constant current drive, add the fail safe of drive circuit, be applicable to the LED of relatively high power, breach the limitation that simple linear constant current drive mode can only drive small-signal lamp to throw light on;
4, in drive circuit without any switching node, EMC (Electromagnetic Compatibility, Electro Magnetic Compatibility) problem can not be caused.
The utility model also proposes a kind of vehicle, comprises the LED illumination drive unit described in the utility model embodiment.Wherein, vehicle can be fork truck.
The automobile of the utility model embodiment, has the following advantages:
1, without the need to devices such as special control chip, inductance capacitance and fly-wheel diodes, structure is simple, and cost is lower;
2, the mode that resistance current limliting and linear constant current drive is combined, make use of the Linear Amplifer characteristic of transistor, make in drive circuit, all to use analog quantity to regulate, if the input of power supply is stablized, then a few family can not produce output ripple, the better effects if of constant current, under the prerequisite ensureing reference voltage precision, the constant current accuracy of LED also improves greatly;
3, combine the mode that resistance current limliting and linear constant current drive, add the fail safe of drive circuit, be applicable to the LED of relatively high power, breach the limitation that simple linear constant current drive mode can only drive small-signal lamp to throw light on;
4, in drive circuit without any switching node, EMC (Electromagnetic Compatibility, Electro Magnetic Compatibility) problem can not be caused.
Should be appreciated that each several part of the present utility model can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", etc. term should be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (9)
1. a LED illumination drive unit, is characterized in that, comprising:
LED；
First brilliance control end and the second brilliance control end;
Transistor, the first end of described transistor is connected with described second brilliance control end with described first brilliance control end respectively, and the second end of described transistor is connected with described LED;
Detect resistance, the first end of described detection resistance is connected with described LED, the second end ground connection of described detection resistance, and described detection resistance is for detecting the output current of described LED; Adjusting module, the first input end of described adjusting module is connected with the second end with the first end of described detection resistance respectively with the second input, the output of described adjusting module is connected with the control end of described transistor, and described adjusting module is used for adjusting described transistor according to the output current of described detection resistance detection; And
Control module, the input of described control module is connected with described second brilliance control end, the output of described control module is connected with the control end of described detection resistance, and described control module adjusts according to the resistance of control signal to described detection resistance of described second brilliance control end.
2. LED illumination drive unit as claimed in claim 1, is characterized in that, also comprise:
Vent diverter, described vent diverter and described coupled in parallel.
3. LED illumination drive unit as claimed in claim 2, it is characterized in that, described vent diverter is resistance.
4. LED illumination drive unit as claimed in claim 1, is characterized in that, also comprise:
First diode, the anode of described first diode is connected with described first brilliance control end, and the negative electrode of described first diode is connected with the first end of described transistor;
Second diode, the anode of described second diode is connected with described second brilliance control end, and the negative electrode of described second diode is connected with the first end of described transistor; And
3rd diode, the anode of described 3rd diode is connected with described second brilliance control end, and the negative electrode of described 3rd diode is connected with the input of described control module.
5. LED illumination drive unit as claimed in claim 1, it is characterized in that, described adjusting module specifically comprises:
Error amplifier, the first input end of described error amplifier is connected with the first end of described detection resistance, and the second input of described error amplifier is connected with preset reference voltage;
Current amplifier, the input of described current amplifier is connected with the output of described error amplifier, and the output of described current amplifier is connected with the control end of described transistor.
6. LED illumination drive unit as claimed in claim 1, it is characterized in that, described transistor is in linear zone.
7. LED illumination drive unit as claimed in claim 1, it is characterized in that, when described second brilliance control end is triggered, the brightness of described LED is greater than the brightness of described LED when described first brilliance control end is triggered.
8. a vehicle, is characterized in that, comprises the LED illumination drive unit as described in any one of claim 1-7.
9. vehicle as claimed in claim 8, it is characterized in that, described vehicle is fork truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420734078.1U CN204291474U (en) | 2014-11-27 | 2014-11-27 | LED illumination drive unit and the vehicle with this drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420734078.1U CN204291474U (en) | 2014-11-27 | 2014-11-27 | LED illumination drive unit and the vehicle with this drive unit |
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| Publication Number | Publication Date |
|---|---|
| CN204291474U true CN204291474U (en) | 2015-04-22 |
Family
ID=52874598
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420734078.1U Expired - Fee Related CN204291474U (en) | 2014-11-27 | 2014-11-27 | LED illumination drive unit and the vehicle with this drive unit |
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| CN (1) | CN204291474U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107926092A (en) * | 2015-09-02 | 2018-04-17 | Zkw集团有限责任公司 | energy supply circuit for lighting module |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
| CN110417283A (en) * | 2019-07-27 | 2019-11-05 | 山东晶导微电子股份有限公司 | Power module |
| CN113015289A (en) * | 2021-03-15 | 2021-06-22 | 无锡英迪芯微电子科技股份有限公司 | LED constant current drive circuit with low power consumption |
-
2014
- 2014-11-27 CN CN201420734078.1U patent/CN204291474U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107926092A (en) * | 2015-09-02 | 2018-04-17 | Zkw集团有限责任公司 | energy supply circuit for lighting module |
| CN107926092B (en) * | 2015-09-02 | 2019-11-19 | Zkw集团有限责任公司 | Energy supply circuit for lighting module |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
| CN110417283A (en) * | 2019-07-27 | 2019-11-05 | 山东晶导微电子股份有限公司 | Power module |
| CN113015289A (en) * | 2021-03-15 | 2021-06-22 | 无锡英迪芯微电子科技股份有限公司 | LED constant current drive circuit with low power consumption |
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