CN206323600U - It is a kind of while changing the LED drive circuit of luminous flux and light color temperature - Google Patents
It is a kind of while changing the LED drive circuit of luminous flux and light color temperature Download PDFInfo
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- CN206323600U CN206323600U CN201621347014.1U CN201621347014U CN206323600U CN 206323600 U CN206323600 U CN 206323600U CN 201621347014 U CN201621347014 U CN 201621347014U CN 206323600 U CN206323600 U CN 206323600U
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Abstract
The utility model provides a kind of while changing luminous flux and the LED drive circuit of light color temperature, including：Luminous flux regulation circuit, colour temperature adjusts circui, output LED load；The output LED load goes out the LED light source that light color temperature is differed including at least two groups；The colour temperature adjusts circui includes a comparator and switching device；One input of the comparator sets a reference voltage, and the electric current that the voltage of another input adjusts circuit output with luminous flux increases and increased；The output end of comparator is connected with the grid of the switching device；The switching device controls the conducting and shut-off of one of which LED light source, and then changes and light color temperature.The utility model provides a kind of while changing luminous flux and the LED drive circuit of light color temperature, and low cost is simple in construction.
Description
Technical field
The utility model is related to LED drive circuit, more particularly to a kind of while changing the LED drivings of luminous flux and light color temperature
Circuit.
Background technology
LED illumination lamp is because its brightness is high, power is small, long service life advantage has been obtained extensively in today's society
Ground popularization and application.Traditional LED lamp often only possesses the function of light modulation, and changes the luminous flux size of light fixture output, and
Do not possess toning function, exactly change the light color temperature of light fixture output.Added to change in this present situation, LED drive circuit
The function of toning.
Increasing the function of toning in traditional LED dimming driving circuits needs increase single-chip microcomputer and leading portion bus line parallactic angle
Detection, circuit is very complicated, and cost is also higher.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of while changing luminous flux and the LED of light color temperature
Drive circuit, low cost is simple in construction.
In order to solve above-mentioned technical problem, the utility model provides a kind of while changing luminous flux and light color temperature
LED drive circuit, including：Luminous flux regulation circuit, colour temperature adjusts circui, output LED load；
The output LED load goes out the LED light source that light color temperature is differed including at least two groups；Also, between different groups
The conducting voltage of LED light source is differed；The cathode output end of one of which LED light source connects a voltage-stabiliser tube ZD3, to adjust reorganization
Electric conduction pressure difference between LED light source and other LED light sources；
The colour temperature adjusts circui includes a comparator and switching device；One input of the comparator sets one
Reference voltage, the electric current that the voltage of another input adjusts circuit output with luminous flux increases and increased；Comparator it is defeated
Go out end to open or close with controlling the switching device；
Switching device control one of which LED light source adjusts circuit communication or disconnection with luminous flux, and then uses
Light color temperature, which is in, single to be gone out optical mode or to blend optical mode.
In a preferred embodiment：The output LED load includes first group of LED light source and second group of LED light source, wherein
The conducting voltage of first group of LED light source is less than the conducting voltage of second group of LED light source.
In a preferred embodiment：The electric conduction pressure difference of first group of LED light source and second group of LED light source is at least 3V.
In a preferred embodiment：During the switch device conductive, first group of LED light source and second group of LED light source difference
Conducting；As luminous flux adjusts the increase of circuit output current, prior to second group LED light source of first group of LED light source is lighted；With
The continuation increase of luminous flux regulation circuit output current, first group of LED light source and second group of LED light source are lighted simultaneously；When light is logical
When the electric current of amount regulation circuit output increases to switching device shut-off, first group of LED light source extinguishes, second group of LED light source
It is remain on.
In a preferred embodiment：First group of LED light source and second group of LED light source share an output cathode.
In a preferred embodiment：The output cathode is connected to the positive pole of the comparator by a Voltage stabilizing module circuit
Input.
In a preferred embodiment：The output negative pole of first group of LED light source is connected to the moon of the voltage-stabiliser tube ZD3
Pole, the output that voltage-stabiliser tube ZD3 anode is connected to the drain electrode of switching device, the source electrode of switching device and second group of LED light source is born
Pole, the grid of switching device are connected to the output end of the comparator；The negative input connection of comparator；Described second group
LED output negative pole is grounded by a decompression network.
In a preferred embodiment：The Voltage stabilizing module circuit includes the resistance R31 and voltage-stabiliser tube ZD11 being connected in series；Institute
State resistance R1 one end to be connected with the output cathode, the other end is connected to voltage-stabiliser tube ZD11 negative electrode, voltage-stabiliser tube ZD11 anode
Ground connection.
In a preferred embodiment：The Voltage stabilizing module circuit also includes the resistance R2 and voltage-stabiliser tube U1 being connected in series；Institute
The one end for stating resistance R2 is connected with R1 and voltage-stabiliser tube ZD11 common port, and the other end is connected to voltage-stabiliser tube U1 negative electrode and reference
End；The plus earth of the voltage-stabiliser tube U1, voltage-stabiliser tube U1 negative electrode is connected to the electrode input end of comparator.
Compared to prior art, the utility model possesses following beneficial effect：
Therefore, by the conducting voltage of comparator come controlling switch device Q1 grid voltage, controlling switch device Q1's
Conducting and shut-off, so as to control the conducting and cut-off of first group of LED light source.Control whole light fixture goes out light color temperature from first group
LED colour temperature carries out colour mixtures to two groups of LED, then to second group of LED colour temperature.So as to realize the switching of different LED colour temperatures.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment.
Embodiment
The utility model is described further below in conjunction with the drawings and specific embodiments.
It is a kind of while change the LED drive circuit of luminous flux and light color temperature with reference to Fig. 1, including：Luminous flux regulation circuit,
Colour temperature adjusts circui, output LED load；
The output LED load goes out the LED light source that light color temperature is differed including two groups；
The colour temperature adjusts circui includes a comparator U2 and switching device Q1；One input of the comparator is set
A reference voltage is put, the electric current that the voltage of another input adjusts circuit output with luminous flux increases and increased；Comparator
Output end be connected with the grid of the switching device；
The output LED load includes first group of LED light source and second group of LED light source, wherein first group of LED light source is led
The pressure that is powered is less than the conducting voltage of second group of LED light source, and its difference is at least 3V.
Specific circuit structure is as follows：First group of LED light source and second group of LED light source share an output cathode.Institute
State the electrode input end that output cathode is connected to the comparator by a Voltage stabilizing module circuit.
The output negative pole of first group of LED light source be connected to switching device Q1 drain electrode, switching device Q1 source electrode with
The negative input connection of the output negative pole, comparator U2 of second group of LED light source；The output negative pole of second group of LED passes through
One decompression network (resistance R9, R10 of series connection) is grounded.
The Voltage stabilizing module circuit includes the resistance R1 and voltage-stabiliser tube ZD1 being connected in series；Described resistance R1 one end with it is described
Output cathode is connected, and the other end is connected to voltage-stabiliser tube ZD1 negative electrode, voltage-stabiliser tube ZD1 plus earth.Voltage-stabiliser tube ZD1 will be exported
The voltage stabilization of positive pole output is to 5.1V.5.1V voltages after stable are connected to voltage-stabiliser tube U1 the moon after resistance R2 partial pressures again
Pole and reference edge, the 2.5V voltages stablized, 2.5V voltages obtain voltage Uref after resistance R3 and R4 partial pressure again.Voltage
Uref is connected to voltage-stabiliser tube ZD2 negative electrode by resistance R5, R6 again.Wherein, the positive pole of R5 and R6 common port and comparator U2 is defeated
Enter end connection.
Therefore, the voltage stabilization of comparator electrode input end is：U2+=(Uref*R6+Uz2*R5)/(R5+R6).And compare
Compared with the voltage U2-=I3* (R9+R10) of device negative input, I3 is two paths of LED light source negative pole output current sum.Therefore compare
The voltage of device negative input increases as luminous flux adjusts the increase of circuit output current.
After above-mentioned setting, when circuit starts to start, luminous flux regulation circuit is transferred to least significant end, luminous flux regulation electricity
The voltage LED+ of road output is very low, starts output current I0, now has electric current to flow through second group of LED light source, but electric current I2 very littles,
Second group of LED light source normal work can't be maintained, therefore the second paths of LEDs light source is non-lit up.Because electric current I2 very littles, derailing switch
Part Q1 is not turned on, I3=I2, U2-=I2 (R9+R10), now U2-<U2+.Comparator exports high level, and switching device Q1 is led
Logical, first group of LED light source begins with electric current I1 and flowed through.Now U2- ≈ Ui=I3 (R9+R10), voltage U2- are also less than voltage
U2+。
When the phase angle of light modulator slowly increases, on-state voltage LED+slowly increase, output current I0 also slowly increases.
When output current I0, which is increased to, can maintain the work of first group of LED light source, first group of LED light source is started working, and passes through the
The electric current I2 of two groups of LED light sources can't maintain second group of LED light source normal work.Slowly increase with the phase angle of light modulator
Greatly, output current I0 also slowly increases, and the electric current I1 on the 1st tunnel also increases, and first group of LED light source is more and more brighter.Flow through second group
The electric current I2 of LED light source also increases, but does not turn on also.Now go out colour temperature of the light color temperature for first group of LED light source.
When the phase angle of light modulator increases to some angle, being increased to by the electric current I2 of second group of LED light source can be with
When maintaining second group of LED light source work, second group of LED light source starts to light, and U2- now<U2+, now two groups of LED light sources
Light simultaneously, carry out colour mixture, go out light color temperature change.
As the phase angle of light modulator continues to increase, output current I0 also continues to increase, is more than electricity when increasing to voltage U2-
When pressing U2+, comparator output low level, switching device Q1 shut-offs, first group of LED light source is turned off, now only second group LED light
Source works, and goes out colour temperature of the light color temperature for second group of LED.
Therefore, by the conducting voltage of comparator come controlling switch device Q1 grid voltage, controlling switch device Q1's
Conducting and shut-off, so as to control the conducting and cut-off of first group of LED light source.Control whole light fixture goes out light color temperature from first group
LED colour temperature carries out colour mixtures to two groups of LED, then to second group of LED colour temperature.So as to realize the switching of different LED colour temperatures.
In order to preferably realize the effect of two groups of LED light source colour mixtures, voltage-stabiliser tube ZD3 is added in first group of LED light source, can
By changing voltage-stabiliser tube ZD3 voltage stabilizing value, to change the electric conduction pressure difference between two groups of LED light sources so that color blending effect reaches
Most preferably.
The above, only the utility model preferably embodiment, but design concept of the present utility model is not
This is confined to, any one skilled in the art utilizes this design in the technical scope that the utility model is disclosed
The change of unsubstantiality is carried out to the utility model, belongs to invade the behavior of the utility model protection domain.
Claims (9)
1. it is a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that including：Luminous flux regulation circuit,
Colour temperature adjusts circui, output LED load；
The output LED load goes out the LED light source that light color temperature is differed including at least two groups；Also, the LED light between different groups
The conducting voltage in source is differed；The cathode output end of one of which LED light source connects a voltage-stabiliser tube ZD3, to adjust reorganization LED light
Electric conduction pressure difference between source and other LED light sources；
The colour temperature adjusts circui includes a comparator and switching device；One input of the comparator sets one to refer to
Voltage, the electric current that the voltage of another input adjusts circuit output with luminous flux increases and increased；The output end of comparator
Opened or closed with controlling the switching device；
Switching device control one of which LED light source adjusts circuit communication or disconnection with luminous flux, and then uses photochromic
Temperature goes out optical mode or to blend optical mode in single.
2. it is according to claim 1 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The output LED load includes first group of LED light source and second group of LED light source, wherein the conducting voltage of first group of LED light source is small
In the conducting voltage of second group of LED light source.
3. it is according to claim 2 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The electric conduction pressure difference of first group of LED light source and second group of LED light source is at least 3V.
4. it is according to claim 2 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
During the switch device conductive, first group of LED light source and second group of LED light source are respectively turned on；As luminous flux regulation circuit is defeated
Go out the increase of electric current, prior to second group LED light source of first group of LED light source is lighted；As luminous flux adjusts circuit output current
Continue to increase, first group of LED light source and second group of LED light source are lighted simultaneously；When luminous flux adjusts the electric current increase of circuit output
When being turned off to switching device, first group of LED light source extinguishes, second group of LED light source is remain on.
5. it is according to claim 2 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
First group of LED light source and second group of LED light source share an output cathode.
6. it is according to claim 5 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The output cathode is connected to the electrode input end of the comparator by a Voltage stabilizing module circuit.
7. it is according to claim 5 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The output negative pole of first group of LED light source is connected to the negative electrode of the voltage-stabiliser tube ZD3, and voltage-stabiliser tube ZD3 anode is connected to out
Described in the drain electrode of pass device, the output negative pole of the source electrode of switching device and second group of LED light source, the grid of switching device are connected to
The output end of comparator；The negative input connection of comparator；The output negative pole of second group of LED is connect by a decompression network
Ground.
8. it is according to claim 7 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The Voltage stabilizing module circuit includes the resistance R31 and voltage-stabiliser tube ZD11 being connected in series；Described resistance R1 one end is exported just with described
Pole is connected, and the other end is connected to voltage-stabiliser tube ZD11 negative electrode, voltage-stabiliser tube ZD11 plus earth.
9. it is according to claim 8 a kind of while changing luminous flux and the LED drive circuit of light color temperature, it is characterised in that：
The Voltage stabilizing module circuit also includes the resistance R2 and voltage-stabiliser tube U1 being connected in series；One end of the resistance R2 and R1 and voltage-stabiliser tube
ZD11 common port connection, the other end is connected to voltage-stabiliser tube U1 negative electrode and reference edge；The plus earth of the voltage-stabiliser tube U1, surely
Pressure pipe U1 negative electrode is connected to the electrode input end of comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621347014.1U CN206323600U (en) | 2016-12-09 | 2016-12-09 | It is a kind of while changing the LED drive circuit of luminous flux and light color temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621347014.1U CN206323600U (en) | 2016-12-09 | 2016-12-09 | It is a kind of while changing the LED drive circuit of luminous flux and light color temperature |
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| Publication Number | Publication Date |
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| CN206323600U true CN206323600U (en) | 2017-07-11 |
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ID=59267207
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621347014.1U Active CN206323600U (en) | 2016-12-09 | 2016-12-09 | It is a kind of while changing the LED drive circuit of luminous flux and light color temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110730535A (en) * | 2019-10-25 | 2020-01-24 | 厦门阳光恩耐照明有限公司 | Module and method for switching color temperature through dimming |
| CN112997584A (en) * | 2018-10-29 | 2021-06-18 | 昕诺飞控股有限公司 | Lighting system with connected light sources |
-
2016
- 2016-12-09 CN CN201621347014.1U patent/CN206323600U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112997584A (en) * | 2018-10-29 | 2021-06-18 | 昕诺飞控股有限公司 | Lighting system with connected light sources |
| CN112997584B (en) * | 2018-10-29 | 2024-03-29 | 昕诺飞控股有限公司 | Lighting system with connected light sources |
| CN110730535A (en) * | 2019-10-25 | 2020-01-24 | 厦门阳光恩耐照明有限公司 | Module and method for switching color temperature through dimming |
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