CN110493926A - A kind of control method of lighting circuit, control circuit and lighting circuit - Google Patents
A kind of control method of lighting circuit, control circuit and lighting circuit Download PDFInfo
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- CN110493926A CN110493926A CN201910856066.3A CN201910856066A CN110493926A CN 110493926 A CN110493926 A CN 110493926A CN 201910856066 A CN201910856066 A CN 201910856066A CN 110493926 A CN110493926 A CN 110493926A
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- electric current
- regulation pipe
- timing
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 8
- 230000003111 delayed effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of control methods of lighting circuit, control circuit and lighting circuit, the lighting circuit includes Serial regulation pipe, the load of the lighting circuit is LED light, rectified voltage is obtained after the rectified circuit rectifies of alternating current input power supplying, the Serial regulation pipe is connected with LED light, the rectified voltage powers to LED light, when the rectified voltage is more than or equal to first voltage, the Serial regulation pipe conducting, and the electric current for controlling the LED light is the first electric current, timing or the timing since LED light electric current is the first electric current since LED light conducting, when timing reaches at the first time, or when rectified voltage is more than or equal to second voltage, then control the Serial regulation pipe shutdown, the electric current of the LED light is zero, in next half of power frequency period, when the rectified voltage is more than or equal to The first voltage, the Serial regulation pipe are connected again.
Description
Technical field
The present invention relates to power electronics fields, and in particular to a kind of control method of lighting circuit, control circuit and
Lighting circuit.
Background technique
With LED lamp bead and illumination technological development, linear LED illumination scheme is because electronic component is few at low cost, just
It is produced in full Surface Mounting Technology technique, the modular illuminating product of light engine easy to accomplish, while improving production efficiency and reducing people
Work cost, concern and research of the linear LED illumination scheme by more and more people.But the application of conventional linear scheme has very greatly
Limitation, can be only applied in specific input voltage range according to the case where load voltage, beyond after input voltage range,
Variation sharply can occur for load current and power, seriously affect illuminating effect or damage LED lamp bead.Therefore, how to make line
Property scheme in output electric current do not influenced by input voltage, and guarantee to export electric current or power invariability, be current to be badly in need of solution
Certainly the problem of.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of control method of lighting circuit, control circuit and power for illumination
Road, to solve the problems, such as that export electric current in the prior art is influenced by input voltage.
The technical solution of the invention is as follows, provides a kind of control method of lighting circuit, and the lighting circuit includes line
Property adjustment pipe, the load of the lighting circuit is LED light, obtain rectified voltage after the rectified circuit rectifies of alternating current input power supplying,
The Serial regulation pipe is connected with LED light, and the rectified voltage powers to LED light, when the rectified voltage is more than or equal to first
Voltage, the Serial regulation pipe conducting, and the electric current for controlling the LED light is the first electric current, the timing since LED light conducting
Or since LED light electric current be the first electric current timing, when timing reach at the first time, or when the rectified voltage be greater than etc.
In second voltage, then the Serial regulation pipe shutdown is controlled, the electric current of the LED light is zero, in next half of power frequency period
In, when the rectified voltage is more than or equal to the first voltage, the Serial regulation pipe is connected again.
As optional, the first voltage is the forward conduction voltage drop of LED light, when the rectified voltage is more than or equal to first
Voltage was delayed for the second time, Serial regulation pipe conducting, since LED light conducting timing or from LED light electric current be described
First electric current starts timing, when timing reaches the first time, then controls the Serial regulation pipe shutdown.
As optional, the first time reduces with the increase of the peak value or virtual value of the rectified voltage.
As optional, when the rectified voltage is more than or equal to the second voltage, the Serial regulation pipe shutdown, institute are controlled
The first electric current is stated to reduce with the increase of the peak value or virtual value of the rectified voltage.
Another technical solution of the invention is also to provide a kind of control circuit of lighting circuit, the lighting circuit
Including Serial regulation pipe, the load of the lighting circuit is LED light, is rectified after the rectified circuit rectifies of alternating current input power supplying
Voltage, the Serial regulation pipe are connected with LED light, and the rectified voltage powers to LED light, when the rectified voltage is more than or equal to
First voltage, the control circuit controls the Serial regulation pipe conducting, and the electric current for controlling the LED light is the first electricity
Stream, since LED light be connected start timing or since LED light electric current be the first electric current timing, when timing reach first time, or
Person is more than or equal to second voltage when the rectified voltage, then the control circuit controls the Serial regulation pipe shutdown, the LED
The electric current of lamp is zero, in next half of power frequency period, when the rectified voltage is more than or equal to first voltage, the linear tune
Homogeneous tube is connected again.
As optional, the control circuit includes voltage sampling circuit, current sampling circuit and current control circuit, described
Voltage sampling circuit samples the rectified voltage, obtains sampled voltage, the current sampling circuit samples the electricity of the LED light
Stream, obtains sampled current signals, is more than or equal to first voltage, the electric current control when the sampled voltage characterizes the rectified voltage
The conducting of Serial regulation pipe described in circuit control processed, and according to sampled current signals, the electric current for controlling the LED light is the first electricity
Stream, the current control circuit timing or timing since LED light electric current is the first electric current since being connected LED light, works as meter
When reach at the first time, or when the rectified voltage is more than or equal to second voltage, then described in current control circuit control
The shutdown of Serial regulation pipe.
As optional, the first voltage is the forward conduction voltage drop of LED light, when the sampled voltage characterizes the rectification
Voltage is more than or equal to first voltage, and the current control circuit was delayed for the second time, controls the Serial regulation pipe conducting, from
LED light conducting starts timing or the timing since LED light electric current is first electric current, when timing reaches described first
Between, then control the Serial regulation pipe shutdown.
As optional, the first time reduces with the increase of the peak value or virtual value of the rectified voltage.
As optional, when the rectified voltage is more than or equal to the second voltage, the Serial regulation pipe shutdown, institute are controlled
The first electric current is stated to reduce with the increase of the peak value or virtual value of the rectified voltage.
Another technical solution of the invention is to provide a kind of lighting circuit.
Using circuit structure and method of the invention, compared with prior art, have the advantage that output electric current not by defeated
Enter voltage influence, guarantees output electric current or power approximately constant.
Detailed description of the invention
Fig. 1 is the realization block diagram of lighting circuit of the present invention and its control circuit；
Fig. 2 is the rectified voltage and output current wave of the embodiment of the present invention；
Fig. 3 is the rectified voltage and output current wave of another embodiment of the present invention；
Fig. 4 is the rectified voltage and output current wave of further embodiment of this invention；
Fig. 5 is the realization block diagram of lighting circuit of the present invention and its another embodiment of control circuit.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
The present invention provides a kind of control method of lighting circuit, please refers to shown in Fig. 1, and lighting circuit includes Serial regulation pipe
M01, the load of the lighting circuit are LED light, obtain rectified voltage VREC, institute after the rectified circuit rectifies of alternating current input power supplying
It states Serial regulation pipe M01 to connect with LED light, the rectified voltage VREC powers to LED light, when the rectified voltage VREC is greater than
Equal to first voltage, the Serial regulation pipe M01 conducting, and the electric current for controlling the LED light is the first electric current, from LED light
Conducting starts timing or the timing since LED light electric current is the first electric current, when timing reaches at the first time, or when described whole
Galvanic electricity pressure is more than or equal to second voltage, then controls the Serial regulation pipe shutdown, the electric current of the LED light is zero, next
In half of power frequency period, when the rectified voltage is more than or equal to first voltage, the Serial regulation pipe is connected again.
It please refers to shown in Fig. 2, is the rectified voltage and output current wave of the embodiment of the present invention, when the rectified voltage
VREC is more than or equal to first voltage, the Serial regulation pipe M01 conducting, and the electric current for controlling the LED light is the first electric current
I1, since LED light be connected start timing or since LED light electric current be the first electric current I1 timing, when timing reach first time,
The Serial regulation pipe shutdown is then controlled, the electric current of the LED light is zero, in next half of power frequency period, when described whole
Galvanic electricity pressure is more than or equal to first voltage, and the Serial regulation pipe is connected again.
It please refers to shown in Fig. 3, is the rectified voltage and output current wave of another embodiment of the present invention, when the rectified current
VREC is pressed to be more than or equal to first voltage V1, the Serial regulation pipe M01 conducting, and the electric current for controlling the LED light is first
Electric current I1 then controls Serial regulation pipe shutdown when the rectified voltage is more than or equal to second voltage V2, the LED light
Electric current is zero, in next half of power frequency period, when the rectified voltage is more than or equal to first voltage V1, the Serial regulation
Pipe is connected again
It please refers to shown in Fig. 4, is the rectified voltage and output current wave of another embodiment of the present invention, the first voltage
For the forward conduction voltage drop VLED of LED light, when the rectified voltage VREC is more than or equal to first voltage, it was delayed for the second time, institute
The conducting of Serial regulation pipe is stated, timing or the timing since LED light electric current is the first electric current, work as timing since LED light conducting
Reach at the first time, then controls the Serial regulation pipe shutdown.By second time that was delayed, so that after the conducting of Serial regulation pipe,
Electric current in LED light can reach the first electric current.
When first time is fixed value, output power will not change with the variation of input voltage.But it is inputting
When voltage is high, the efficiency of system can be reduced, in some occasions, in order to keep input power constant, then when controlling described first
Between reduce with the increase of the peak value or virtual value of the rectified voltage.
The first voltage is less than or equal to the forward conduction voltage drop of LED light.Then when Serial regulation pipe is from turning off to being connected,
When forward conduction voltage drop of the first voltage less than LED light, then exports electric current and be not up to the first electric current, when rectified voltage is greater than
When the forward conduction voltage drop of LED light, then exporting electric current can be only achieved the first electric current.When the first voltage is being greater than LED light just
When to conduction voltage drop, then when Serial regulation pipe is from turning off to being connected, when first voltage is less than the forward conduction voltage drop of LED light,
Then exporting electric current can achieve the first electric current.
In one embodiment, when the rectified voltage be more than or equal to the second voltage, control the Serial regulation pipe
Shutdown, the first electric current I1 reduce with the increase of the peak value or virtual value of the rectified voltage.Due to high input voltage
Under transfer efficiency than lower under low input, therefore by setting the first electric current with the rectified voltage peak value or
The increase of virtual value and reduce, to achieve the effect that approximate input firm power.
It please refers to shown in Fig. 5, the lighting circuit further includes first diode D10 and first capacitor C10, the rectified current
Pressure is connected to the LED light or the Serial regulation pipe by the first diode D10, the first capacitor C10 and described
LED light is in parallel.To reduce the current ripples of LED load and increase the average current of output LED.
It the present invention also provides a kind of control circuit of lighting circuit, please refers to shown in Fig. 1, the lighting circuit includes linear
Pipe M01 is adjusted, the load of the lighting circuit is LED light, obtains rectified voltage after the rectified circuit rectifies of alternating current input power supplying
VREC, the Serial regulation pipe M01 connect with LED light, and the rectified voltage powers to LED light, when the rectified voltage is greater than
Equal to first voltage, the control circuit controls the Serial regulation pipe M01 conducting, and the electric current for controlling the LED light is
First electric current, timing or the timing since LED light electric current is the first electric current since LED light conducting, when timing reaches first
Time, or when the rectified voltage is more than or equal to second voltage, then the control circuit controls the Serial regulation pipe shutdown,
The electric current of the LED light is zero, in next half of power frequency period, when the rectified voltage is more than or equal to first voltage, institute
Serial regulation pipe is stated to be connected again.
Please continue to refer to shown in Fig. 1, in one embodiment, the control circuit includes voltage sampling circuit 320, electric current
Sample circuit 330 and current control circuit 310, the voltage sampling circuit 320 sample the rectified voltage VREC, are sampled
Voltage V31, the current sampling circuit 330 sample the electric current of the LED light, obtain sampled current signals V32, when the sampling
Voltage V31 characterizes the rectified voltage VREC and is more than or equal to first voltage, and the current control circuit controls the Serial regulation
Pipe M01 conducting, and according to sampled current signals V32, the electric current for controlling the LED light is the first electric current, the current control
Circuit since LED light be connected start timing or since LED light electric current be the first electric current timing, when timing reach first time,
Or when the rectified voltage is more than or equal to second voltage, then the current control circuit controls the Serial regulation pipe shutdown.
In one embodiment, the first voltage is the forward conduction voltage drop of LED light, when the sampled voltage characterizes institute
Rectified voltage is stated more than or equal to first voltage, the current control circuit was delayed for the second time, controls the Serial regulation pipe and lead
It is logical, timing or the timing since LED light electric current is the first electric current since LED light conducting, when timing reaches at the first time, then
Control the Serial regulation pipe shutdown.
In one embodiment, the first time subtracts with the increase of the peak value or virtual value of the rectified voltage
It is small.
In one embodiment, the first voltage is less than or equal to the forward conduction voltage drop of LED light.
In one embodiment, when the rectified voltage be more than or equal to the second voltage, control the Serial regulation pipe
Shutdown, first electric current reduce with the increase of the peak value or virtual value of the rectified voltage.
It please refers to shown in Fig. 5, the lighting circuit further includes first diode D10 and first capacitor C10, the rectified current
Pressure is connected to the LED light or the Serial regulation pipe by the first diode D10, the first capacitor C10 and described
LED light is in parallel.To reduce the current ripples of LED load and increase the average current of output LED.
The present invention also provides a kind of lighting circuits.
In addition to this, although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in this field
Those of ordinary skill apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and record is not known
Content, then can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of control method of lighting circuit, the lighting circuit includes Serial regulation pipe, and the load of the lighting circuit is
LED light obtains rectified voltage after the rectified circuit rectifies of alternating current input power supplying, and the Serial regulation pipe is connected with LED light, described
Rectified voltage powers to LED light, and when the rectified voltage is more than or equal to first voltage, the Serial regulation pipe is connected, and controls
The electric current for making the LED light is the first electric current, is connected since LED light and starts timing or since LED light electric current for the first electric current
Timing, when timing reach at the first time, or when the rectified voltage be more than or equal to second voltage, then control the Serial regulation
Pipe shutdown, the electric current of the LED light is zero, in next half of power frequency period, when the rectified voltage is more than or equal to described
First voltage, the Serial regulation pipe are connected again.
2. the control method of lighting circuit according to claim 1, it is characterised in that: the first voltage is LED light
Forward conduction voltage drop, when the rectified voltage is more than or equal to first voltage, the second time of delay, the Serial regulation pipe is connected,
Timing or the timing since LED light electric current is first electric current since LED light conducting, when timing reaches described first
Between, then control the Serial regulation pipe shutdown.
3. the control method of lighting circuit according to claim 1, it is characterised in that: the first time is with described whole
The increase of the peak value or virtual value of galvanic electricity pressure and reduce.
4. the control method of lighting circuit according to claim 1, it is characterised in that: when the rectified voltage is more than or equal to
The second voltage, controls Serial regulation pipe shutdown, first electric current with the rectified voltage peak value or effectively
The increase of value and reduce.
5. a kind of control circuit of lighting circuit, the lighting circuit includes Serial regulation pipe, and the load of the lighting circuit is
LED light obtains rectified voltage after the rectified circuit rectifies of alternating current input power supplying, and the Serial regulation pipe is connected with LED light, described
Rectified voltage powers to LED light, and when the rectified voltage is more than or equal to first voltage, the control circuit controls the linear tune
Homogeneous tube conducting, and the electric current for controlling the LED light is the first electric current, the timing or from LED light electric current since LED light conducting
Start timing for the first electric current, when timing reaches at the first time, or when the rectified voltage is more than or equal to second voltage, then institute
It states control circuit and controls the Serial regulation pipe shutdown, the electric current of the LED light is zero, in next half of power frequency period,
When the rectified voltage is more than or equal to first voltage, the Serial regulation pipe is connected again.
6. the control circuit of lighting circuit according to claim 5, it is characterised in that: the control circuit includes that voltage is adopted
Sample circuit, current sampling circuit and current control circuit, the voltage sampling circuit sample the rectified voltage, obtain sampling electricity
Pressure, the current sampling circuit sample the electric current of the LED light, obtain sampled current signals, when the sampled voltage characterizes institute
Rectified voltage is stated more than or equal to first voltage, the current control circuit controls the Serial regulation pipe conducting, and according to adopting
Sample current signal, the electric current for controlling the LED light is the first electric current, current control circuit timing since being connected LED light
Or since LED light electric current be the first electric current timing, when timing reach at the first time, or when the rectified voltage be greater than etc.
In second voltage, then the current control circuit controls the Serial regulation pipe shutdown.
7. the control circuit of lighting circuit according to claim 6, it is characterised in that: the first voltage is LED light
Forward conduction voltage drop is more than or equal to first voltage, the current control circuit when the sampled voltage characterizes the rectified voltage
Be delayed for the second time, control Serial regulation pipe conducting, since LED light conducting timing or from LED light electric current be described
First electric current starts timing, when timing reaches the first time, then controls the Serial regulation pipe shutdown.
8. the control circuit of lighting circuit according to claim 6, it is characterised in that: the first time is with described whole
The increase of the peak value or virtual value of galvanic electricity pressure and reduce.
9. the control circuit of lighting circuit according to claim 6, it is characterised in that: when the rectified voltage is more than or equal to
The second voltage, controls Serial regulation pipe shutdown, first electric current with the rectified voltage peak value or effectively
The increase of value and reduce.
10. a kind of lighting circuit, it is characterised in that: including the control circuit as described in claim 5~9 any one, or use
Control method described in Claims 1 to 4 any one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921051325 | 2019-07-08 | ||
| CN2019210513257 | 2019-07-08 |
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| Publication Number | Publication Date |
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| CN110493926A true CN110493926A (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921504638.3U Active CN211152284U (en) | 2019-07-08 | 2019-09-10 | Control circuit of lighting circuit and lighting circuit |
| CN201910856066.3A Pending CN110493926A (en) | 2019-07-08 | 2019-09-10 | A kind of control method of lighting circuit, control circuit and lighting circuit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921504638.3U Active CN211152284U (en) | 2019-07-08 | 2019-09-10 | Control circuit of lighting circuit and lighting circuit |
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| CN (2) | CN211152284U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211152284U (en) * | 2019-07-08 | 2020-07-31 | 杰华特微电子（杭州）有限公司 | Control circuit of lighting circuit and lighting circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979630A (en) * | 2016-06-08 | 2016-09-28 | 杰华特微电子（杭州）有限公司 | Led drive circuit |
| CN107911907A (en) * | 2017-12-11 | 2018-04-13 | 矽力杰半导体技术(杭州)有限公司 | LED drive circuit, power inverter and control method |
| CN211152284U (en) * | 2019-07-08 | 2020-07-31 | 杰华特微电子（杭州）有限公司 | Control circuit of lighting circuit and lighting circuit |
-
2019
- 2019-09-10 CN CN201921504638.3U patent/CN211152284U/en active Active
- 2019-09-10 CN CN201910856066.3A patent/CN110493926A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979630A (en) * | 2016-06-08 | 2016-09-28 | 杰华特微电子（杭州）有限公司 | Led drive circuit |
| CN107911907A (en) * | 2017-12-11 | 2018-04-13 | 矽力杰半导体技术(杭州)有限公司 | LED drive circuit, power inverter and control method |
| CN211152284U (en) * | 2019-07-08 | 2020-07-31 | 杰华特微电子（杭州）有限公司 | Control circuit of lighting circuit and lighting circuit |
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| Publication number | Publication date |
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| CN211152284U (en) | 2020-07-31 |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |