CN207947926U - A kind of light adjusting circuit and its light-emitting device - Google Patents
A kind of light adjusting circuit and its light-emitting device Download PDFInfo
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- CN207947926U CN207947926U CN201820307648.7U CN201820307648U CN207947926U CN 207947926 U CN207947926 U CN 207947926U CN 201820307648 U CN201820307648 U CN 201820307648U CN 207947926 U CN207947926 U CN 207947926U
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- circuit
- capacitance
- resistor
- light adjusting
- adjusting circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The application discloses a kind of light adjusting circuit and its light-emitting device, the light adjusting circuit include：Light modulator, rectification circuit and absorbing circuit, wherein：The output end of the light modulator is connect with the input terminal of the rectification circuit, and the output end of the rectification circuit is connect with the input terminal of the absorbing circuit；The absorbing circuit includes the first capacitance, first resistor and control switch module, and the absorbing circuit includes that the first capacitance, first resistor and control switch module, the control switch module are in parallel with the first resistor.Since control switch module is in parallel with first resistor, when the control switch module is in the conduction state, since first resistor is in short-circuit condition, the main electrical current in the light adjusting circuit will not flow through the first resistor, can also reduce the power attenuation of first resistor in the absorbing circuit.
Description
Technical field
This application involves field of circuit technology more particularly to a kind of light adjusting circuits and its light-emitting device.
Background technology
Currently, using it is silicon-controlled to light emitting diode (Light Emitting Diode, LED) carry out light modulation be common
One of LED light regulating technologies.However, in thyristor regulating optical circuit, when changing the brightness of light by controllable silicon dimmer, changing
When the brightness of darkening input voltage and electric current also can instantaneous variation it is big, being easy to generate concussion in circuit can not so as to cause circuit
Normal work.
In order to solve this problem, the prior art eliminates above-mentioned this concussion often through addition absorbing circuit, you can
To eliminate this concussion by adding RC absorbing circuits, the stability of circuit is promoted.As Fig. 1 show silicon-controlled light modulation electricity
Road, including：Controllable silicon dimmer D, rectification circuit DB1, for differential mode filtering capacitance CX1, for the capacitance C1 of High frequency filter
And RC absorbing circuits R1 and C2.As shown in Fig. 2, for electric current in circuit before and after having added concussion to eliminate circuit R1 and C2
Change schematic diagram when changing greatly with voltage instantaneous, it is clear that after having added RC absorbing circuits R1 and C2, can alleviate in circuit
The concussion that circuit is generated when electric current and voltage instantaneous change greatly.
In above-mentioned scene, due to the presence of resistance R in RC circuits, entire circuit power loss is also just inevitably resulted in
Increase.
Invention content
A kind of light adjusting circuit of the embodiment of the present application offer and its light-emitting device, for solving in existing light adjusting circuit, by
The power attenuation that there are problems that causing entire light adjusting circuit of resistance increases in absorbing circuit.
The embodiment of the present application provides a kind of light adjusting circuit, including：Light modulator, rectification circuit and absorbing circuit, wherein：
The output end of the light modulator is connect with the input terminal of the rectification circuit, the output end of the rectification circuit and institute
State the input terminal connection of absorbing circuit；
The absorbing circuit includes the first capacitance, first resistor and control switch module, the control switch module and institute
State first resistor parallel connection.
Preferably, the control switch module includes backward dioded, metal oxide semiconductor field effect tube, the second electricity
Appearance and second resistance, wherein
One end of the first resistor is connect with the anode of the backward dioded, the cathode of the backward dioded and institute
The drain electrode connection of metal oxide semiconductor field effect tube is stated, the other end of the first resistor is partly led with the metal oxide
The source electrode of body field-effect tube connects；
The both ends of second capacitance respectively with the grid of the metal oxide semiconductor field effect tube and the metal
The source electrode of oxide semiconductor field effect pipe connects, and the second resistance is in parallel with second capacitance.
Preferably, the control switch module includes triode, the second capacitance and second resistance, wherein
One end of the first resistor is connect with the collector of the triode, the other end of the first resistor with it is described
The emitter of triode connects；
The both ends of second capacitance are connect with the base stage of the triode and emitter respectively, the second resistance and institute
State the parallel connection of the second capacitance.
Preferably, the metal oxide semiconductor field effect tube is N-type metal oxide semiconductor field effect tube.
Preferably, when the grid that second capacitor charging reaches the metal oxide semiconductor field effect tube opens electricity
When pressure, the metal oxide semiconductor field effect tube is in the conduction state.
Preferably, the control switch module includes SCR silicon controlled rectifiers, the second capacitance and second resistance, wherein
One end of the first resistor is connect with the anode of the SCR, and the other end of the first resistor is with the SCR's
Cathode connects；
The both ends of second capacitance are connect with the cathode of the control pole of the SCR and the SCR respectively；Second electricity
Resistance is in parallel with second capacitance.
Preferably, when second capacitor charging reaches the control pole cut-in voltage of the SCR, the SCR is in and leads
Logical state.
Preferably, the light adjusting circuit further includes third capacitance and the 4th capacitance, wherein
The both ends of the third capacitance are connect with two input terminals of the rectification circuit respectively；
Two DC output ends of the rectification circuit are connect with the both ends of the 4th capacitance respectively；
4th capacitance is in parallel with the absorbing circuit.
Preferably, the control switch module includes digital switch.
The embodiment of the present application also provides a kind of light-emitting device, including light adjusting circuit and lamps and lanterns described above.
Above-mentioned at least one technical solution that the embodiment of the present application uses can reach following advantageous effect：
Light adjusting circuit provided by the embodiments of the present application, including light modulator, rectification circuit and absorbing circuit, wherein absorbing circuit
Including the first capacitance, first resistor and control switch module, since control switch module is in parallel with first resistor, when the control
When switch module is in the conduction state, since first resistor is in short-circuit condition, the main electrical current in the light adjusting circuit will not
The first resistor is flowed through, the power attenuation of first resistor in the absorbing circuit can be also reduced.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram of light adjusting circuit in the prior art；
Fig. 2 is that the variation of light adjusting circuit in the prior art Current Voltage in the light modulation before and after having added absorbing circuit compares
Figure；
Fig. 3 is a kind of structural schematic diagram of light adjusting circuit provided by the embodiments of the present application；
Fig. 4 is a kind of structural schematic diagram of the specific implementation of light adjusting circuit provided by the embodiments of the present application；
Fig. 5 is the structural schematic diagram of the specific implementation of another light adjusting circuit provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram of the specific implementation of another light adjusting circuit provided by the embodiments of the present application.
Specific implementation mode
In order to solve the above-mentioned problems in the prior art, the embodiment of the present application provides a kind of light adjusting circuit, and its dress
It sets, compared to existing technologies, which increases control switch module on RC absorbing circuits, the control switching molding
Resistor coupled in parallel in block RC absorbing circuits, when the control switch module is in the conduction state, the resistance in RC absorbing circuits is just
In short-circuit condition, therefore the power damage of resistance in RC absorbing circuits can be reduced when control switch module is in the conduction state
Consumption.
Technical scheme is clearly and completely retouched with reference to the application specific embodiment and corresponding attached drawing
It states.Obviously, the described embodiments are only a part but not all of the embodiments of the present application.Based in the application
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall in the protection scope of this application.
Fig. 3 please be participate in, is a kind of structural schematic diagram for the light adjusting circuit for originally asking embodiment to provide.The light adjusting circuit includes：
Label is added in light modulator D, rectification circuit DB1 and absorbing circuit X, wherein the output end of light modulator D is defeated with rectification circuit DB1's
Enter end connection, the output end of rectification circuit DB1 connect with the input terminal of absorbing circuit X, absorbing circuit X including the first capacitance C2,
First resistor R1 and control switch module Q, the control switch module Q are in parallel with first resistor R1.Wherein, light modulator D can be
Controllable silicon dimmer.When the Current Voltage in the light adjusting circuit is in stable state, switch module Q can be controlled by control
Conducting reduce the power attenuation of first resistor R1 in absorbing circuit X.
Wherein, rectification circuit can be rectifier bridge, that is, bridge rectifier, which can be complete in practical applications
Wave rectification and halfwave rectifier.
In practical applications, control switch module Q can have following three kinds of realization methods：
The first, refers to Fig. 4, and control switch module Q includes backward dioded D1, metal oxide semiconductcor field effect
(Metal Oxide Semiconductor, MOS) Q1, the second capacitance C3 and second resistance R2 should be managed, wherein first resistor R1
The anode of one end and backward dioded D1 connect, the cathode of backward dioded D1 is connect with the drain electrode of metal-oxide-semiconductor Q1, first resistor
The other end of R1 is connect with the source electrode of MOS pipes；The both ends of second capacitance C3 respectively with the grid of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q1
Source electrode connects；Second resistance R2 is in parallel with the second capacitance C3.Wherein, metal oxide semiconductor field effect tube here is N-type
Metal oxide semiconductor field effect tube.
When the first capacitance C2 charging, since the charging delay of C3 capacitances acts on, metal-oxide-semiconductor Q1 then can turn on delay, C2 fills
Electric immediate current flows through first resistor R1, and therefore, R1 can play the role of absorbing concussion at this time.
When the second capacitance C3 chargings reach the gate turn-on voltage of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 is then in the conduction state,
When metal-oxide-semiconductor Q1 is in the conduction state, first resistor R1 is then in the state of short circuit, at this point, the main electrical current in circuit then only flows
Through backward dioded D1 and metal-oxide-semiconductor Q1, and since the conducting resistance of MOS pipes Q1 is smaller, the power attenuation of backward dioded D1
Smaller, therefore, the power attenuation on metal-oxide-semiconductor Q1 and backward dioded D1 then can be ignored at this time, therefore also energy
Enough reduce the power attenuation of light adjusting circuit.
And when the first capacitance C2 is in discharge condition, due to the presence of backward dioded D1 in circuit, can avoid putting
Electric current is formed into a loop in metal-oxide-semiconductor.
Second, Fig. 5 please be participate in, which includes triode Q2, the second capacitance C3 and second resistance R2,
In, one end of first resistor R1 is connect with the collector of triode Q2, the transmitting of the other end and triode Q2 of first resistor R1
Pole connects；The both ends of second capacitance C3 are connect with the base stage of triode Q2 and emitter respectively；Second resistance R2 and the second capacitance
C3 is in parallel.
When the second capacitance C3 chargings reach the gate turn-on voltage of triode Q2, triode Q2 is then in the conduction state,
When triode Q2 is in the conduction state, first resistor R1 is then in the state of short circuit, at this point, main electrical current in circuit is then only
Triode Q2 is flowed through, and since the conducting resistance of triode Q2 is smaller, the power attenuation on triode Q2 then may be used at this time
To ignore, therefore it can also reduce the power attenuation of light adjusting circuit.
The third, please participate in Fig. 6, which includes SCR silicon controlled rectifiers Q3, the second capacitance C3 and
Two resistance R2, wherein one end of the first resistor R1 and the anode of SCR connect, the other end of first resistor R1 and the moon of SCR
Pole connects；The both ends of second capacitance C3 are connect with the cathode of the control pole of SCR and SCR respectively；Second resistance R2 and the second capacitance
C3 is in parallel.
When the second capacitance C3 chargings reach the control pole cut-in voltage of SDR, SDR is in the conduction state, is in and leads in SDR
When logical state, first resistor R1 is then in the state of short circuit, at this point, the main electrical current in circuit then only flows through SDR, and due to
The conducting resistance of SDR is smaller, and therefore, the power attenuation on SDR then can be ignored at this time, therefore can also reduce tune
The power attenuation of optical circuit.
Optionally, above-mentioned control switch module can also be realized in practical applications with digital switch.
In addition, in order to filter out the DM EMI and High-frequency Interference in the circuit, which can also include third electricity
Hold CX1 and the 4th capacitance C1, wherein the both ends of third capacitance CX1 are connect with two input terminals of rectification circuit DB1 respectively, should
Third capacitance CX1 is used for the DM EMI in filtering circuit；Two DC output ends of rectification circuit DB1 respectively with the 4th capacitance
The both ends of C1 connect, and the 4th capacitance C1 is in parallel with absorbing circuit X, and it is dry that the 4th capacitance C1 is used for the high frequency in filtering circuit
It disturbs.
Light adjusting circuit provided by the embodiments of the present application, including light modulator, rectification circuit and absorbing circuit, wherein absorbing circuit
Including the first capacitance, first resistor and control switch module, since control switch module is in parallel with first resistor, when the control
When switch module is in the conduction state, since first resistor is in short-circuit condition, the main electrical current in the light adjusting circuit will not
The first resistor is flowed through, the power attenuation of first resistor in the absorbing circuit can be also reduced.
The embodiment of the present application also provides a kind of lamps and lanterns, and the lamps and lanterns may include light-emitting device and above-mentioned light adjusting circuit.Institute
It includes substrate and the LED that is set on substrate to state light-emitting device, the lamps and lanterns further include lamp body group be equipped with the light-emitting device and
Drive component is provided with the light adjusting circuit and is electrically connected the light-emitting device.
It will be understood by those skilled in the art that although the preferred embodiment of the application has been described, skill in the art
Art personnel once know basic creative concept, then additional changes and modifications may be made to these embodiments.So appended
Claim, which is intended to be construed to, to be included preferred embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out the application model of the various modification and variations without departing from the application
It encloses.In this way, if these modifications and variations of the application belong within the scope of the application claim and its equivalent technologies, then
The application is also intended to include these modifications and variations.
Claims (10)
1. a kind of light adjusting circuit, which is characterized in that including：Light modulator, rectification circuit and absorbing circuit, wherein：
The output end of the light modulator is connect with the input terminal of the rectification circuit, the output end of the rectification circuit and the suction
Receive the input terminal connection of circuit；
The absorbing circuit includes the first capacitance, first resistor and control switch module, the control switch module and described the
One resistor coupled in parallel.
2. light adjusting circuit as described in claim 1, which is characterized in that the control switch module includes backward dioded, gold
Belong to oxide semiconductor field effect pipe, the second capacitance and second resistance, wherein
One end of the first resistor is connect with the anode of the backward dioded, the cathode of the backward dioded and the gold
Belong to the drain electrode connection of oxide semiconductor field effect pipe, the other end of the first resistor and the MOS field
The source electrode of effect pipe connects；
The both ends of second capacitance are aoxidized with the grid of the metal oxide semiconductor field effect tube and the metal respectively
The source electrode of object semiconductor field connects, and the second resistance is in parallel with second capacitance.
3. light adjusting circuit as claimed in claim 2, which is characterized in that the metal oxide semiconductor field effect tube is N-type
Metal oxide semiconductor field effect tube.
4. light adjusting circuit as claimed in claim 2, which is characterized in that when second capacitor charging reaches the metal oxidation
When the gate turn-on voltage of object semiconductor field, the metal oxide semiconductor field effect tube is in the conduction state.
5. light adjusting circuit as described in claim 1, which is characterized in that the control switch module includes triode, the second electricity
Appearance and second resistance, wherein
One end of the first resistor is connect with the collector of the triode, the other end of the first resistor and three pole
The emitter of pipe connects；
The both ends of second capacitance are connect with the base stage of the triode and emitter respectively, the second resistance and described the
Two capacitances are in parallel.
6. light adjusting circuit as described in claim 1, which is characterized in that the control switch module includes SCR silicon controlled rectifiers
Element, the second capacitance and second resistance, wherein
One end of the first resistor is connect with the anode of the SCR, the cathode of the other end of the first resistor and the SCR
Connection；
The both ends of second capacitance are connect with the cathode of the control pole of the SCR and the SCR respectively；The second resistance with
Second capacitance is in parallel.
7. light adjusting circuit as claimed in claim 6, which is characterized in that when second capacitor charging reaches the control of the SCR
When pole cut-in voltage processed, the SCR is in the conduction state.
8. light adjusting circuit as described in claim 1, which is characterized in that the light adjusting circuit further includes third capacitance and the 4th electricity
Hold, wherein
The both ends of the third capacitance are connect with two input terminals of the rectification circuit respectively；
Two DC output ends of the rectification circuit are connect with the both ends of the 4th capacitance respectively；
4th capacitance is in parallel with the absorbing circuit.
9. light adjusting circuit as described in claim 1, which is characterized in that the control switch module includes digital switch.
10. a kind of light-emitting device, which is characterized in that including：Light adjusting circuit and lamps and lanterns as described in any one of claim 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307648.7U CN207947926U (en) | 2018-03-06 | 2018-03-06 | A kind of light adjusting circuit and its light-emitting device |
| PCT/CN2019/077178 WO2019170105A1 (en) | 2018-03-06 | 2019-03-06 | Dimming circuit and light emitting device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307648.7U CN207947926U (en) | 2018-03-06 | 2018-03-06 | A kind of light adjusting circuit and its light-emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207947926U true CN207947926U (en) | 2018-10-09 |
Family
ID=63696711
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820307648.7U Active CN207947926U (en) | 2018-03-06 | 2018-03-06 | A kind of light adjusting circuit and its light-emitting device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN207947926U (en) |
| WO (1) | WO2019170105A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019170105A1 (en) * | 2018-03-06 | 2019-09-12 | 欧普照明股份有限公司 | Dimming circuit and light emitting device thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052200B (en) * | 2011-10-13 | 2016-04-20 | 欧司朗股份有限公司 | Lighting Control Assembly and control method thereof |
| TWI455432B (en) * | 2012-01-20 | 2014-10-01 | Macroblock Inc | Dynamic damper module for a driving circuit |
| CN207947926U (en) * | 2018-03-06 | 2018-10-09 | 欧普照明股份有限公司 | A kind of light adjusting circuit and its light-emitting device |
-
2018
- 2018-03-06 CN CN201820307648.7U patent/CN207947926U/en active Active
-
2019
- 2019-03-06 WO PCT/CN2019/077178 patent/WO2019170105A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019170105A1 (en) * | 2018-03-06 | 2019-09-12 | 欧普照明股份有限公司 | Dimming circuit and light emitting device thereof |
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| Publication number | Publication date |
|---|---|
| WO2019170105A1 (en) | 2019-09-12 |
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