CN206948665U - A kind of bridge-type light modulation toning drive circuit - Google Patents
A kind of bridge-type light modulation toning drive circuit Download PDFInfo
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- CN206948665U CN206948665U CN201720725286.9U CN201720725286U CN206948665U CN 206948665 U CN206948665 U CN 206948665U CN 201720725286 U CN201720725286 U CN 201720725286U CN 206948665 U CN206948665 U CN 206948665U
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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]
Abstract
The utility model provides a kind of bridge-type light modulation toning drive circuit, it is characterised in that including：Input power module, bridge-type control module and LED module；There is the first LED light group and the second LED light group that light emission color temperature differs, the first LED light group is in parallel with the second LED light group, and the light emitting diode cathode and anode directions in the first LED light group and the second LED light group are opposite in LED module；Bridge-type control module includes control chip and the first arm path, the second arm path；When control chip is located at the first gear, the first LED light group is lighted, the second LED light group is extinguished；When control chip is located at the second gear, the second LED light group is lighted, the first LED light group is extinguished；Change control chip within the unit interval positioned at the time accounting of the first gear or the second gear, you can change and light color；Change control chip within the unit interval positioned at the temporal summation of the first gear time and the second gear time, you can change emitting brightness.
Description
Technical field
It the utility model is related to a kind of LED drive circuit, more particularly to a kind of LED drive circuit for dimming toning.
Background technology
LED lamp is required for the drive circuit that a driving LED light source is lighted, and with LED development, drive circuit is
Through developing the drive circuit in order to possess light modulation, mix colours or be provided simultaneously with light modulation toning from traditional constant-current drive circuit.It is right
In the drive circuit for being provided simultaneously with light modulation toning, it is necessary to which three output lines connect with LED light source, and the LED light source dimmed merely
Only need two output lines.Therefore the output line of both LED drive circuits can not be mixed with connection terminal, for producer
Speech needs to produce the connection terminal of two kinds of specifications, adds cost.For a user, if necessary to change connection terminal, also
Need to distinguish the specification for connection terminal, difficulty is also bigger.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of drive circuit for dimming toning, it is only necessary to two
Root line is connected with LED light source, so as to use same output line and connection terminal with non-toning product.
In order to solve above-mentioned technical problem, the utility model provides a kind of bridge-type light modulation toning drive circuit, including：
Input power module, bridge-type control module and LED module；There is the first LED that light emission color temperature differs in the LED module
Group and the second LED light group, first LED light group is in parallel with second LED light group, first LED light group and the 2nd LED
Light emitting diode cathode and anode directions in lamp group are opposite；
The bridge-type control module includes control chip and the first arm path, the second arm path, the control chip
During positioned at the first gear, electric current I1From the positive pole of input power module input is returned to after the first arm path, the first LED light group
The negative pole of power module, the first LED light group is lighted, the second LED light group is extinguished；When the control chip is located at the second gear, electricity
Flow I2The negative pole of input power module is returned to after the second arm path, the second LED light group from the positive pole of input power module, the
Two LED light groups are lighted, the first LED light group is extinguished；
Change the control chip within the unit interval positioned at the time accounting of the first gear or the second gear, you can change
LED module goes out light color；Change the control chip and be located at the first gear time and the second gear time within the unit interval
Temporal summation, you can change the emitting brightness of LED module.
In a preferred embodiment：First arm path includes first switch pipe and the 3rd switching tube, the second bridge arm
Branch road includes second switch pipe and the 4th switching tube；The control chip exports pwm control signal to the first switch respectively
Pipe, second switch pipe, the 3rd switching tube, the controlled stage of the 4th switching tube.
In a preferred embodiment：The current output terminal of the first switch pipe is connected to two in first LED light group
The positive pole of pole pipe, the negative pole of diode is connected to the current input terminal of the 3rd switching tube in the first lamp group.
In a preferred embodiment：The current input terminal of the first switch pipe is being connected to the input power module just
Pole, the current output terminal of the 3rd switching tube are connected to the negative pole of the input power module.
In a preferred embodiment：The current output terminal of the second switch pipe is connected to two in second LED light group
The positive pole of pole pipe, the negative pole of diode is connected to the current input terminal of the 4th switching tube in the second lamp group.
In a preferred embodiment：The current input terminal of the second switch pipe is being connected to the input power module just
Pole, the current output terminal of the 4th switching tube are connected to the negative pole of the input power module.
In a preferred embodiment：When the control chip is located at the first gear, first switch pipe, the 3rd switching tube are led
It is logical；When the control chip is located at the second gear, second switch pipe, the conducting of the 4th switching tube.
In a preferred embodiment：The first switch pipe Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th are opened
Close pipe Q4 be pMOS pipe or be nMOS pipe or be triode.
In a preferred embodiment：First LED light group is cool colour light source, the second LED light group is warm colour light source.
Compared to prior art, the technical solution of the utility model possesses following beneficial effect：
A kind of bridge-type light modulation toning drive circuit provided by the utility model, goes out to close what colour temperature differed by setting two groups
LED light source, and then control this two groups of LED light sources to light duration within the unit interval by bridge-type control module, it is possible to change
Become the ratio of the light of both colour temperatures in the light that human eye receives, and then change the colour temperature for the mixed light that human eye receives.Meanwhile
Total duration is lighted by change in the unit interval two groups of LED light sources, it is possible to changes the brightness of mixed light.Hereby be achieved that
The purpose of toning is dimmed, and LED light source only needs to be connected with two output lines in this circuit structure.Allow for using this
After drive circuit, output line and connection terminal can use the output line used in LED light source that is traditional, dimming merely and company
Connecting terminal.Therefore, manufacturer need not just produce the connection terminal of two kinds of specifications, and consumer is when changing connection terminal, without spy
The specification of connection terminal is not noticed, can accomplish unified standard.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment；
Fig. 2, Fig. 3 are when control chip is located at the first gear and the second gear respectively in the utility model preferred embodiment
Equivalent circuit flow graph.
Embodiment
This case is described in further detail with reference to the accompanying drawings and detailed description.
With reference to figure 1, a kind of bridge-type light modulation toning drive circuit, including：Input power module 1, the and of bridge-type control module 2
LED module 3；There is the first LED light group D1 and the second LED light group D2 that light emission color temperature differs, specifically in the LED module 3
The first LED light group D1 be cool colour light source, the second LED light group D2 be warm colour light source.
The first LED light group D1 is in parallel with the second LED light group D2, the first LED light group D1 and the second LED
Light emitting diode cathode and anode directions in group D2 are opposite；
Referring to figs. 1 to Fig. 3, the bridge-type control module 2 include control chip (being not shown on figure) and the first arm path,
Second arm path, when the control chip is located at the first gear, electric current I1From the positive pole of input power module 1 through the first bridge arm
The negative pole of input power module 1 is returned to after branch road, the first LED light group D1, the first LED light group D1 is lighted, the second LED light group D2 puts out
Go out；When the control chip is located at the second gear, electric current I2From the positive pole of input power module 1 through the second arm path, second
The negative pole of input power module 1 is returned to after LED light group D2, the second LED light group D2 is lighted, the first LED light group D1 extinguishes；
That is, when control chip is in the first gear or the second gear, the first LED light group D1 and the second LED
Have in group D2 and only one group is to be in illuminating state.The frequency for switching the first gear or the second gear when control chip exists
During more than 20KHz, human eye can not just tell the first LED light group D1 and the second LED light group D2 alternating is lighted and extinguished.Take and
Instead of, human eye experience be exactly the first LED light group D1 and the second LED light group D2 two kinds of color of light it is mixed go out it is photochromic
Temperature.So as long as changing the control chip within the unit interval positioned at the time accounting of the first gear or the second gear, you can
Change LED module goes out light color；Likewise, change the control chip within the unit interval positioned at the first gear time and the
The temporal summation of two gear times, you can change the emitting brightness of LED module.Hereby be achieved that the purpose of light modulation toning, and
And LED module only needs to be connected with two output lines in this circuit structure, allow for after using this drive circuit, output line
The output line and connection terminal used in LED light source that is traditional, dimming merely can be used with connection terminal.Therefore, manufacturer
The connection terminal of two kinds of specifications need not be just produced, consumer is when changing connection terminal, without giving special heed to connection terminal
Specification, unified standard can be accomplished.
Specific circuit connecting relation is as described below in the present embodiment：First arm path includes first switch pipe Q1
Include second switch pipe Q2 and the 4th switching tube Q4 with the 3rd switching tube Q3, the second arm path；The control chip difference is defeated
Go out pwm control signal PWM1, PWM2, PWM3 and PWM4 to the first switch pipe Q1, second switch pipe Q2, the 3rd switching tube
Q3, the 4th switching tube Q4 controlled stage.When control chip exports high level to switching tube, switching tube conducting, otherwise this is opened
Close cut-off.
The current output terminal of the first switch pipe Q1 is connected to the positive pole of diode in the first LED light group D1, the
The negative pole of diode is connected to the 3rd switching tube Q3 current input terminal in one lamp group D1.
The current input terminal of the first switch pipe Q1 is connected to the positive pole of the input power module 1, the 3rd switching tube
Q3 current output terminal is connected to the negative pole of the input power module 1.
The current output terminal of the second switch pipe Q2 is connected to the positive pole of diode in the second LED light group D2, the
The negative pole of diode is connected to the 4th switching tube Q4 current input terminal in two lamp group D2.
The current input terminal of the second switch pipe Q2 is connected to the positive pole of the input power module 1, the 4th switching tube
Q4 current output terminal is connected to the negative pole of the input power module 1.
When the control chip is located at the first gear, control chip exports high level to the switches of first switch pipe Q1 and the 3rd
Pipe Q3 control pole, first switch pipe Q1, the 3rd switching tube Q3 conducting；Now electric current I in circuit1Flow direction is as shown in Fig. 2 can be with
Find out, now the first LED light group D1 is correspondingly lighted.Likewise, when the control chip is located at the second gear, control chip output
To second switch pipe Q2 and the 4th switching tube Q4 control pole, first switch pipe Q2, the 3rd switching tube Q4 are turned on high level；Now
Electric current I in circuit2Flow direction is fig. 3, it is shown that now the second LED light group D2 is correspondingly lighted.So just complete this reality
Apply the technical scheme of example.
The first switch pipe Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4 are pMOS pipes
Be nMOS pipe or be triode.
It is described above, only it is preferred embodiment of the present utility model, not technical scope of the present utility model is made
Any restrictions, the present embodiment are intended to the idea and operation principle for illustrating the utility model, therefore every according to skill of the present utility model
Art substantially makees the subtle modifications, equivalent variations and modifications of any shape and structure to above example, still falls within this practicality
In the range of new technique scheme.
Claims (9)
- A kind of 1. bridge-type light modulation toning drive circuit, it is characterised in that including：Input power module, bridge-type control module and LED Module；There is the first LED light group and the second LED light group that light emission color temperature differs, first LED in the LED module Group, light emitting diode cathode and anode directions in first LED light group and second LED light group in parallel with second LED light group Conversely；The bridge-type control module includes control chip and the first arm path, the second arm path, the control chip are located at During the first gear, electric current I1From the positive pole of input power module input power is returned to after the first arm path, the first LED light group The negative pole of module, the first LED light group is lighted, the second LED light group is extinguished；When the control chip is located at the second gear, electric current I2 The negative pole of input power module is returned to after the second arm path, the second LED light group from the positive pole of input power module, second LED light group is lighted, the first LED light group is extinguished；Change the control chip within the unit interval positioned at the time accounting of the first gear or the second gear, you can change LED Module goes out light color；Change the control chip within the unit interval positioned at the first gear time and the second gear time when Between summation, you can change the emitting brightness of LED module.
- A kind of 2. bridge-type light modulation toning drive circuit according to claim 1, it is characterised in that：First arm path Include second switch pipe and the 4th switching tube including first switch pipe and the 3rd switching tube, the second arm path；The control core Piece exports control of the pwm control signal to the first switch pipe, second switch pipe, the 3rd switching tube, the 4th switching tube respectively Level.
- A kind of 3. bridge-type light modulation toning drive circuit according to claim 2, it is characterised in that：The first switch pipe Current output terminal is connected to the positive pole of diode in first LED light group, and the negative pole of diode is connected in the first lamp group The current input terminal of three switching tubes.
- A kind of 4. bridge-type light modulation toning drive circuit according to claim 3, it is characterised in that：The first switch pipe Current input terminal is connected to the positive pole of the input power module, and the current output terminal of the 3rd switching tube is connected to the input electricity The negative pole of source module.
- A kind of 5. bridge-type light modulation toning drive circuit according to claim 4, it is characterised in that：The second switch pipe Current output terminal is connected to the positive pole of diode in second LED light group, and the negative pole of diode is connected in the second lamp group The current input terminal of four switching tubes.
- A kind of 6. bridge-type light modulation toning drive circuit according to claim 5, it is characterised in that：The second switch pipe Current input terminal is connected to the positive pole of the input power module, and the current output terminal of the 4th switching tube is connected to the input electricity The negative pole of source module.
- A kind of 7. bridge-type light modulation toning drive circuit according to claim 6, it is characterised in that：The control chip is located at During the first gear, first switch pipe, the conducting of the 3rd switching tube；When the control chip is located at the second gear, second switch pipe, Four switching tubes turn on.
- A kind of 8. bridge-type light modulation toning drive circuit according to claim 2, it is characterised in that：The first switch pipe Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4 be pMOS pipe or be nMOS pipe or be three poles Pipe.
- A kind of 9. bridge-type light modulation toning drive circuit according to claim 8, it is characterised in that：First LED light group It is warm colour light source for cool colour light source, the second LED light group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725286.9U CN206948665U (en) | 2017-06-21 | 2017-06-21 | A kind of bridge-type light modulation toning drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725286.9U CN206948665U (en) | 2017-06-21 | 2017-06-21 | A kind of bridge-type light modulation toning drive circuit |
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| Publication Number | Publication Date |
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| CN206948665U true CN206948665U (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720725286.9U Active CN206948665U (en) | 2017-06-21 | 2017-06-21 | A kind of bridge-type light modulation toning drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110691449A (en) * | 2019-10-01 | 2020-01-14 | 张素贞 | Double-color LED drive circuit based on bridge unit and LED lighting device |
| CN110944426A (en) * | 2019-11-20 | 2020-03-31 | 宁波鑫合瑞电子有限公司 | Infrared induction type lamp strip controller and control method thereof |
-
2017
- 2017-06-21 CN CN201720725286.9U patent/CN206948665U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110691449A (en) * | 2019-10-01 | 2020-01-14 | 张素贞 | Double-color LED drive circuit based on bridge unit and LED lighting device |
| CN110944426A (en) * | 2019-11-20 | 2020-03-31 | 宁波鑫合瑞电子有限公司 | Infrared induction type lamp strip controller and control method thereof |
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