CN207039972U - A kind of efficient brightness adjusting module - Google Patents
A kind of efficient brightness adjusting module Download PDFInfo
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- CN207039972U CN207039972U CN201721060160.0U CN201721060160U CN207039972U CN 207039972 U CN207039972 U CN 207039972U CN 201721060160 U CN201721060160 U CN 201721060160U CN 207039972 U CN207039972 U CN 207039972U
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Abstract
The utility model provides a kind of efficient brightness adjusting module, and AC power accesses two inputs of rectification circuit, and the cathode output end of rectification circuit is connected to the negative pole of output LED module by inductance L1, and cathode output end is grounded by resistance R5；The cathode output end is also connected with cathode output end by resistance R3, R4 for being connected in series；Described resistance R3, R4 common port are connected to switching tube Q1 control pole；Switching tube Q1 emitter stage is connected to diode D2 negative electrode, diode D2 anode is connected to switching tube Q1 control pole, colelctor electrode is grounded by resistance R5；Also connected between the emitter and collector of the switching tube Q1 by electric capacity C4；One end of the electric capacity C4 is connected to diode D2 negative electrode and switching tube Q2 grid；Switching tube Q2 source electrode is connected to the electric capacity C4 other end, grounded drain.
Description
Technical field
It the utility model is related to a kind of efficient brightness adjusting module.
Background technology
Current China is just in establishing resource economizing type, friendly environment society, and the concept of " green illumination " is also progressively deep
Enter the popular feeling.With the continuous progress of science and technology, the high speed development of semi-conducting material application technology, low-power LED light source extensively should
For Landscape Lighting, application of the LED lamp in terms of home lighting also increasingly obtains the concern of the personage of each side, certainly,
Using LED illumination, it is necessary first to which consideration is its brightness, cost and life-span.Because the main reason for influenceing LED life, there is it
The rush of current of frequent starting moment, the connected mode that extraneous various surge pulses and LED use when in use is as carried out simultaneously
Connection, series connection, as long as having a LED short circuit or open circuit in use, small pieces or whole piece LED will be all caused to extinguish or make LED
Overwork, these problems will all have a strong impact on illuminating effect.Therefore research and design goes out a kind of simple, cheap, practical drive
Dynamic circuit has great importance.
At present in small power LED illumination product, constant current driving and voltage stabilizing driving are widely used.Constant current mode drive circuit exports
Electric current be constant；For voltage-stabilized power supply circuit, its voltage exported is fixed, and the electric current exported is with negative
The increase and decrease of load and change.Due to LED be with the significant device of curent change, when LED forward conductions, its forward voltage it is small
Change can cause the great variety of LED current.For type voltage regulation LED drive power, when the load, current fluctuation
Larger, LED long periods that worked under high current can damage.
At present there is more problem in LED drive circuit, such as：The ability of antisurge is poor, particularly anti-backward voltage energy
Power, also it is exactly the integrity problem of driving source, the protection for strengthening this respect is critically important.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of light-adjusting module, can meet the efficient of power supply
Rate, and can meet the light modulation compatibility of whole lamp.
Technical problem underlying to be solved in the utility model is to provide a kind of efficient brightness adjusting module, and AC power connects
Entering two inputs of rectification circuit, the cathode output end of rectification circuit is connected to the negative pole of output LED module by inductance L1,
Cathode output end is grounded by resistance R5；
The cathode output end is also connected with cathode output end by resistance R3, R4 for being connected in series；Described resistance R3, R4
Common port be connected to switching tube Q1 control pole；Switching tube Q1 emitter stage is connected to diode D2 negative electrode, diode D2
Anode be connected to switching tube Q1 control pole, colelctor electrode is grounded by resistance R5；The emitter stage and current collection of the switching tube Q1
Also connected between pole by electric capacity C4；One end of the electric capacity C4 is connected to diode D2 negative electrode and switching tube Q2 grid；
Switching tube Q2 source electrode is connected to the electric capacity C4 other end, grounded drain；
The cathode output end of the rectification circuit is additionally coupled to electric capacity C1 one end, electric capacity C1 other end ground connection；It is described
Inductance L1 is additionally coupled to electric capacity C2 one end, electric capacity C2 other end ground connection with exporting one end that the negative pole of LED module is connected；Institute
State and go back shunt capacitance C3 and resistance R1 between electric capacity C2 both ends；The electric capacity C3 and resistance R1 are connected in series；The electric capacity C3
One end be connected to inductance L1, resistance R1 one end is connected to the input of control module；The output end of control module passes through two
Pole pipe D1 is connected to the positive pole of output LED module；It is also connected with being electrolysed C5 between the positive pole and negative pole of output LED module；It is electrolysed C5
Both ends be connected in parallel resistance R2；
When whole lamp is without light modulator, the DC voltage of rectification circuit output is opened respectively by resistance R3 and R4 partial pressure
Close pipe Q2 grids and source electrode provides voltage so that switching tube Q2 is turned on so that the voltage at resistance R5 both ends is just corresponding to be reduced, R5
Loss also accordingly decline；When light modulator in whole light bar, during because of regulation light modulator, the cut principle of its controllable silicon is whole to return
The voltage on road will be gradually reduced, and at this moment R3 and R4 partial pressure can not maintain switching tube Q2 unlatching, and resistance R5 directly goes here and there whole
In individual loop, make light modulation compatibility good.
Compared to prior art, the technical solution of the utility model possesses following beneficial effect：
The utility model provides a kind of efficient brightness adjusting module, when without light modulator, the electricity in light-adjusting module loop
Pressure is more than voltage during with light modulator.Now, the DC voltage by rectification circuit output passes through resistance R3 and R4 dividing
Not Gei switching tube Q2 grids and source electrode voltage is provided so that switching tube Q2 is turned on, after conducting switching tube Q2, the electricity at resistance R5 both ends
Pressure is just corresponding to be reduced, and according to I=U/R, the resistance of resistance is fixed, and voltage U reduces, and electric current I also reduces, according to P=I*I*R,
The resistance of resistance is fixed, and I reduces, and P also corresponding reductions, thus R5 loss is just reduced.Electric capacity C4 is to prevent from handing over
Flow voltage switch tube Q2 false triggering and damage Q2, diode D2 pipes are the one-way conductions using diode, prevent electric current
Refluence, switching tube Q1 effect is by the resistance R3 and R4 shunting base to switching tube Q1 respectively after switching tube Q2 shut-offs
Pole and colelctor electrode provide electric current so that switching tube Q1 is turned on, and then the electric charge on electric capacity C4 will be discharged by switching tube Q1.When
In whole light bar during light modulator, because regulation light modulator when, the cut principle of its controllable silicon, the voltage in whole loop will gradually subtract
Small, at this moment resistance R3 and R4 partial pressure can not maintain switching tube Q2 unlatching, and resistance R5 is directly connected in whole loop, so
Light modulation compatibility will be made good.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment.
Embodiment
The technical solution of the utility model is further detailed below by way of embodiment combination accompanying drawing and
Description.
With reference to figure 1, a kind of efficient brightness adjusting module, AC power accesses two inputs of rectification circuit, rectified current
The cathode output end on road is connected to the negative pole of output LED module by inductance L1, and cathode output end is grounded by resistance R5；
The cathode output end is also connected with cathode output end by resistance R3, R4 for being connected in series；Described resistance R3, R4
Common port be connected to switching tube Q1 control pole；Switching tube Q1 emitter stage is connected to diode D2 negative electrode, diode D2
Anode be connected to switching tube Q1 control pole, colelctor electrode is grounded by resistance R5；The emitter stage and current collection of the switching tube Q1
Also connected between pole by electric capacity C4；One end of the electric capacity C4 is connected to diode D2 negative electrode and switching tube Q2 grid；
Switching tube Q2 source electrode is connected to the electric capacity C4 other end, grounded drain；
The cathode output end of the rectification circuit is additionally coupled to electric capacity C1 one end, electric capacity C1 other end ground connection；It is described
Inductance L1 is additionally coupled to electric capacity C2 one end, electric capacity C2 other end ground connection with exporting one end that the negative pole of LED module is connected；Institute
State and go back shunt capacitance C3 and resistance R1 between electric capacity C2 both ends；The electric capacity C3 and resistance R1 are connected in series；The electric capacity C3
One end be connected to inductance L1, resistance R1 one end is connected to the input of control module；The output end of control module passes through two
Pole pipe D1 is connected to the positive pole of output LED module；It is also connected with being electrolysed C5 between the positive pole and negative pole of output LED module；It is electrolysed C5
Both ends be connected in parallel resistance R2；
When whole lamp is without light modulator, the DC voltage of rectification circuit output is opened respectively by resistance R3 and R4 partial pressure
Close pipe Q2 grids and source electrode provides voltage so that switching tube Q2 is turned on so that the voltage at resistance R5 both ends is just corresponding to be reduced, R5
Loss also accordingly decline；When light modulator in whole light bar, during because of regulation light modulator, the cut principle of its controllable silicon is whole to return
The voltage on road will be gradually reduced, and at this moment R3 and R4 partial pressure can not maintain switching tube Q2 unlatching, and resistance R5 directly goes here and there whole
In individual loop, make light modulation compatibility good.
Compared to prior art, the technical solution of the utility model possesses following beneficial effect：
The utility model provides a kind of efficient brightness adjusting module, when without light modulator, the electricity in light-adjusting module loop
Pressure is more than voltage during with light modulator.Now, the DC voltage by rectification circuit output passes through resistance R3 and R4 dividing
Not Gei switching tube Q2 grids and source electrode voltage is provided so that switching tube Q2 is turned on, after conducting switching tube Q2, the electricity at resistance R5 both ends
Pressure is just corresponding to be reduced, and according to I=U/R, the resistance of resistance is fixed, and voltage U reduces, and electric current I also reduces, according to P=I*I*R,
The resistance of resistance is fixed, and I reduces, and P also corresponding reductions, thus R5 loss is just reduced.Electric capacity C4 is to prevent from handing over
Flow voltage switch tube Q2 false triggering and damage Q2, diode D2 pipes are the one-way conductions using diode, prevent electric current
Refluence, switching tube Q1 effect is by the resistance R3 and R4 shunting base to switching tube Q1 respectively after switching tube Q2 shut-offs
Pole and colelctor electrode provide electric current so that switching tube Q1 is turned on, and then the electric charge on electric capacity C4 will be discharged by switching tube Q1.When
In whole light bar during light modulator, because regulation light modulator when, the cut principle of its controllable silicon, the voltage in whole loop will gradually subtract
Small, at this moment resistance R3 and R4 partial pressure can not maintain switching tube Q2 unlatching, and resistance R5 is directly connected in whole loop, so
Light modulation compatibility will be made good.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (1)
- A kind of 1. efficient brightness adjusting module, it is characterised in that：AC power accesses two inputs of rectification circuit, rectified current The cathode output end on road is connected to the negative pole of output LED module by inductance L1, and cathode output end is grounded by resistance R5；The cathode output end is also connected with cathode output end by resistance R3, R4 for being connected in series；Described resistance R3, R4 public affairs End is connected to switching tube Q1 control pole altogether；Switching tube Q1 emitter stage is connected to diode D2 negative electrode, diode D2 sun Pole is connected to switching tube Q1 control pole, colelctor electrode is grounded by resistance R5；The emitter and collector of the switching tube Q1 it Between also connected by electric capacity C4；One end of the electric capacity C4 is connected to diode D2 negative electrode and switching tube Q2 grid；Switch Pipe Q2 source electrode is connected to the electric capacity C4 other end, grounded drain；The cathode output end of the rectification circuit is additionally coupled to electric capacity C1 one end, electric capacity C1 other end ground connection；The inductance L1 is additionally coupled to electric capacity C2 one end, electric capacity C2 other end ground connection with exporting one end that the negative pole of LED module is connected；The electricity Shunt capacitance C3 and resistance R1 are gone back between appearance C2 both ends；The electric capacity C3 and resistance R1 are connected in series；The one of the electric capacity C3 End is connected to inductance L1, and resistance R1 one end is connected to the input of control module；The output end of control module passes through diode D1 is connected to the positive pole of output LED module；It is also connected with being electrolysed C5 between the positive pole and negative pole of output LED module；It is electrolysed the two of C5 End is connected in parallel resistance R2；When whole lamp is without light modulator, the DC voltage of rectification circuit output gives switching tube respectively by resistance R3 and R4 partial pressure Q2 grids and source electrode provide voltage so that switching tube Q2 is turned on so that the voltage at resistance R5 both ends is just corresponding to be reduced, R5 damage Consumption is also corresponding to be declined；When light modulator in whole light bar, because regulation light modulator when, the cut principle of its controllable silicon, whole loop Voltage will be gradually reduced, and at this moment R3 and R4 partial pressure can not maintain switching tube Q2 unlatching, and resistance R5 directly strings are entirely returning Lu Zhong, make light modulation compatibility good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721060160.0U CN207039972U (en) | 2017-08-23 | 2017-08-23 | A kind of efficient brightness adjusting module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721060160.0U CN207039972U (en) | 2017-08-23 | 2017-08-23 | A kind of efficient brightness adjusting module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207039972U true CN207039972U (en) | 2018-02-23 |
Family
ID=61488029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721060160.0U Active CN207039972U (en) | 2017-08-23 | 2017-08-23 | A kind of efficient brightness adjusting module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207039972U (en) |
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2017
- 2017-08-23 CN CN201721060160.0U patent/CN207039972U/en active Active
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