CN110536511A - A kind of Dimmable LED circuit for lamp - Google Patents
A kind of Dimmable LED circuit for lamp Download PDFInfo
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- CN110536511A CN110536511A CN201910825139.2A CN201910825139A CN110536511A CN 110536511 A CN110536511 A CN 110536511A CN 201910825139 A CN201910825139 A CN 201910825139A CN 110536511 A CN110536511 A CN 110536511A
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Abstract
The invention discloses a kind of Dimmable LED circuit for lamp, by Setting pattern, circuit and controllable bleeder circuit are set, three kinds of light modulation toner patterns can be arranged in mode setting circuit, and there are the correspondence variation relations of at least one brightness and colour temperature in each mode, controllable bleeder circuit controls the two-way size of current of tunable optical constant-current circuit output by adjusting the voltage of tunable optical constant-current circuit access, so that the brightness of brightness and the 2nd LED illuminating circuit to the first LED illuminating circuit is adjusted；Advantage is that there are many light modulation toner patterns for user's selection, user passes through continuously switch operation, it can be in these three modes, a kind of brightness colour temperature under selection one mode corresponds to variation relation as a kind of brightness colour temperature of actual use and corresponds to variation relation, and when continuously adjusting brightness, colour temperature corresponds to variation relation also according to selected brightness colour temperature and can continuously with brightness change or remain unchanged, and the flexibility of color temperature adjustment is higher.
Description
Technical field
The present invention relates to a kind of LED lamp circuits, more particularly, to a kind of Dimmable LED circuit for lamp.
Background technique
With the continuous improvement of led light technology, in the case where immovable external circuit, light-adjustable LED lamp can be straight
It connects and replaces incandescent lamp, be widely used.Light-adjustable LED lamp mainly adjusts brightness by light modulator.Common light modulation
Device is to carry out copped wave by the sine wave to alternating current, and the effective voltage for inputting lamps and lanterns is made to change, to make shining for lamps and lanterns
Brightness changes.Such light modulator has the function of switch and two, adjuster, and there are two connectivity ports.Specifically applying line
Lu Zhong, the firewire of the connectivity port connection alternating current of light modulator, another connectivity port connects at least one light-adjustable LED lamp
Firewire incoming end, the zero curve incoming end of light-adjustable LED lamp is connected to the zero curve of alternating current.It, can when the switch of light modulator disconnects
Dimming LED lamp does not have city to be electrically accessed not shine, and when light modulator is when closing the switch, light-adjustable LED lamp accesses alternating current, leads at this time
Effective input voltage of light-adjustable LED lamp is adjusted in the adjuster for crossing light modulator, and light-adjustable LED lamp, which issues, corresponds to effectively input
The brightness of voltage.
Existing light-adjustable LED lamp is generally also provided with color temperature adjustment on the basis of having the function of dimming function.Because adjusting
Section colour temperature can build different illumination atmosphere, so tunable optical that is this while having dimming function and color temperature adjustment function
LED light is increasingly liked by user.The LED light module being arranged inside the light-adjustable LED lamp at least has one group high
Colour temperature LED illuminating circuit and one group of low color temperature LED illuminating circuit.When the total current size for flowing through LED light module changes
When, the light emission luminance of LED light module is also with variation.And works as and flow through high color temperature LED illuminating circuit and the luminous electricity of low color temperature LED
When the size of current ratio on road changes, due to the light emission luminance and stream of high color temperature LED illuminating circuit and low color temperature LED circuit
The size of current for crossing it is directly proportional, and the light emission color temperature of LED light module is also with variation at this time.So present Dimmable LED
Lamp, which passes through, adjusts the size of current progress brightness regulation for flowing through LED light module, and flows through the luminous electricity of high color temperature LED by adjusting
The size of current ratio on road and low color temperature LED illuminating circuit carries out color temperature adjustment.
Currently, according to color temperature adjustment mode, light-adjustable LED lamp is divided into two major classes, and first kind dimming LED lamp colour temperature can not be set
It sets, brightness and colour temperature one change, and each brightness of such light-adjustable LED lamp only has unique colour temperature, the second class Dimmable LED
Lamp first selects one such colour temperature of several colour temperatures by the switch of operation light modulator, adjustable then under the colour temperature of setting
Brightness is saved, each brightness of such light-adjustable LED lamp there are several different colour temperatures available.Although the second light-adjustable LED lamp phase
To with first kind dimming LED lamp, provide different-colour demand to different user, but it is gone down in setting colour temperature condition
Brightness is adjusted, the flexibility of color temperature adjustment is inadequate.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind to have a variety of light modulation toner patterns for user's selection, and
The higher Dimmable LED circuit for lamp of the flexibility of color temperature adjustment.
The technical scheme of the invention to solve the technical problem is: a kind of Dimmable LED circuit for lamp, including be used for
By mains AC be converted to the rectification circuit of direct voltage output, the first LED illuminating circuit of high color temperature, low color temperature second
LED illuminating circuit and tunable optical constant-current circuit, the rectification circuit have firewire input terminal, zero curve input, output end and
Ground terminal, the first LED illuminating circuit and the 2nd LED illuminating circuit are respectively provided with anode and cathode, described
Tunable optical constant-current circuit has input terminal, the first control terminal, the second control terminal, the first output end, second output terminal and ground terminal,
The input terminal of the tunable optical constant-current circuit, the anode of the first LED illuminating circuit and the 2nd LED shine electric
The anode on road is connect with the output end of the rectification circuit, accesses the DC voltage of the rectification circuit output, described
The first output end of tunable optical constant-current circuit connected with the cathode of the first LED illuminating circuit, the tunable optical is permanent
The second output terminal of current circuit is connected with the cathode of the 2nd LED illuminating circuit, and the of the tunable optical constant-current circuit
The first via electric current of one output end output control the first LED illuminating circuit luminous intensity, the first via electric current
The adjusting for the voltage swing that size is accessed by the first control terminal of the tunable optical constant-current circuit, the tunable optical constant current
Second road electric current of the second output terminal output control of circuit the 2nd LED illuminating circuit luminous intensity, described second
The adjusting for the voltage swing that the size of road electric current is accessed by the second control terminal of the tunable optical constant-current circuit, described can
Dimming LED lamp circuit further includes mode setting circuit and controllable bleeder circuit, and the mode setting circuit has anode, detection
End, the first control terminal, the second control terminal and ground terminal, the controllable bleeder circuit have input terminal, the first control terminal, second
Control terminal, the first output end, second output terminal and ground terminal, the test side of the mode setting circuit and the rectified current
The firewire input terminal or zero curve input terminal on road connect, positive, described controllable bleeder circuit of the mode setting circuit
Input terminal is connected with the output end of the rectification circuit respectively, the first control terminal of the mode setting circuit and described
The first control terminal connection of controllable bleeder circuit, the second control terminal of the mode setting circuit and controllable partial pressure electricity
Second control terminal on road connects, and the first of the first output end of the controllable bleeder circuit and the tunable optical constant-current circuit
Second control terminal of control terminal connection, the second output terminal of the controllable bleeder circuit and the tunable optical constant-current circuit connects
It connects, the ground terminal of the mode setting circuit, the ground terminal of the controllable bleeder circuit, the tunable optical constant-current circuit
Ground terminal connected with the ground terminal of the rectification circuit.
The mode setting circuit is used to be arranged the mode of light modulation toning, and the mode setting circuit can be arranged three
Kind mode, and in each mode, there are the correspondence variation relation of at least one brightness and colour temperature, Three models are as follows: it is adjusting
Colour temperature constant mode when brightness, when adjusting brightness, colour temperature with brightness increases linear increment mode and the color when adjusting brightness
Temperature increases linear decline mode with brightness, is operable to by the switch to light modulator to the mode setting circuit
Mode is set, in the state of dimmer switch closure, if first switch is disconnected, then within the set time again opening
It closes and closes, it is believed that carried out a mode setting operation, mode setting operation of every progress, the mode setting circuit is set
The correspondence variation relation switching of the brightness and colour temperature set is primary, when carrying out mode setting operation, if the mode setting
The brightness of circuit current setting and the correspondence variation relation of colour temperature are last a kind of correspondence of brightness and colour temperature under a certain mode
The correspondence variation relation of variation relation, at this time brightness and colour temperature be switched to the first brightness and colour temperature in next mode to strain
Change relationship, otherwise, the correspondence variation relation of brightness and colour temperature are adjusted to the corresponding variation of present intensity and colour temperature in present mode
A kind of lower correspondence variation relation of brightness and colour temperature of relationship, and using the correspondence variation relation of brightness and colour temperature after switching as
Default relationship saves, when the last a kind of correspondence variation relation of brightness and colour temperature being switched under the third light modulation toner pattern
Afterwards, when then carrying out mode setting operation, the first brightness under the first mode and the corresponding variation of colour temperature be will again handoff to
Relationship, in cycles, the first control terminal of the mode setting circuit is according to corresponding first control of its present mode output
Voltage, the second control terminal of the mode setting circuit are described according to the corresponding second control voltage of its present mode output
Controllable bleeder circuit in be respectively arranged with the first control terminal voltage and its first output end output voltage between linear pass
Linear relationship between system and the second control terminal voltage and the voltage of its second output terminal output, so the controllable partial pressure
The voltage of the output end access of circuit is arranged in the output voltage of first second output terminal of circuit according to slave pattern respectively, with
Respective corresponding variation is presented in the effective voltage size of the rectification circuit output end respectively.According to the mode setting
The mode of circuit configuration, the first output end of the controllable bleeder circuit export corresponding voltage and adjust the tunable optical perseverance
The first via electric current of the first output end output of current circuit adjusts the brightness of the first LED illuminating circuit, and described can
The second output terminal of control bleeder circuit exports the second output terminal output that corresponding voltage adjusts the tunable optical constant-current circuit
The second road electric current adjust the brightness of the 2nd LED illuminating circuit, realize colour temperature setting to realize.
The mode setting circuit includes first resistor, second resistance, first capacitor and the first chip, and described first
Chip model is S4223M, and the 6th foot of first chip is the first control terminal of the mode setting circuit, described
1st foot of the first chip is the second control terminal of the mode setting circuit, the 3rd foot of first chip and described
One end of second resistance connects, and the other end of the second resistance is the anode of the mode setting circuit, and described the
4th foot of one chip is connected with one end of the first capacitor, the 5th foot of first chip and the first resistor
One end connection, the other end of the first resistor is the test side of the mode setting circuit, first chip
The 2nd foot connected with the other end of the first capacitor and its connecting pin be the mode setting circuit ground terminal.
The controllable bleeder circuit include 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and
First diode, the first diode are zener diode, and one end of the 3rd resistor is the controllable partial pressure
First control terminal of circuit, one end of the 4th resistance is the second control terminal of the controllable bleeder circuit, described
The other end of 3rd resistor is connected with one end of the 6th resistance and its connecting pin is the of the controllable bleeder circuit
The other end of one output end, the 4th resistance is connected with one end of the 7th resistance and its connecting pin can for described
Control the second output terminal of bleeder circuit, the other end of the 6th resistance, the other end of the 7th resistance, described the
One end of five resistance is connected with the cathode of the first diode, and the other end of the 5th resistance is described controllable point
The input terminal of piezoresistance, the ground terminal of the just extremely described controllable bleeder circuit of the first diode.The of the circuit
One output end is not only related with the voltage waveform of its input terminal with the output voltage of second output terminal, also respectively with its first control
End is related with the state that the second control terminal accesses, when the state that the first control terminal and the second control terminal access is different, first
Control terminal and the second control terminal export different voltage swing ratios in the different voltages waveform of input terminal, so that realizing can
The control of constant-current circuit two-way output electric current is dimmed, structure is simple, high reliablity.
The tunable optical constant-current circuit includes the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, the 12nd
Resistance, the second capacitor, third capacitor, the second chip and third chip, the model SM088 of second chip are described
The model RM9012D of third chip, one end of the 8th resistance is connected with one end of the 9th resistance and it connects
Connect the input terminal that end is the tunable optical constant-current circuit, the of the other end of the 8th resistance and second chip
The connection of 1 foot, the 3rd foot of second chip, one end of second capacitor, the third capacitor one end, described
One end of the tenth resistance, one end of the eleventh resistor, one end of the twelfth resistor and the third core
The bottom electrode of piece connects, and the 1st foot of the third chip is connected with the other end of second capacitor and its connecting pin
For the first control terminal of the tunable optical constant-current circuit, the 3rd foot of the third chip and the third capacitor it is another
One end connection and its connecting pin be the tunable optical constant-current circuit the second control terminal, the 2nd foot of the third chip and
The other end of tenth resistance connects, and the 4th foot of the third chip and the other end of the eleventh resistor connect
It connecing, the 5th foot of the third chip is the second output terminal of the tunable optical constant-current circuit, the of the third chip
6 feet are the first output end of the tunable optical constant-current circuit, the 8th foot of the third chip and the 9th resistance
Other end connection, the 2nd foot of second chip is connected with the other end of the twelfth resistor and its connecting pin is institute
The ground terminal for the tunable optical constant-current circuit stated.The circuit is a kind of linear tunable optical constant-current circuit, has circuit simple, at low cost
The advantages of.
The rectification circuit realizes that the 1st foot of the full bridge rectifier bridge heap is described using full bridge rectifier bridge heap
The firewire input terminal of rectification circuit, the 3rd foot of the full bridge rectifier bridge heap are the zero curve input terminal of the rectification circuit, institute
2nd foot of the full bridge rectifier bridge heap stated is the output end of the rectification circuit, and the 4th foot of the full bridge rectifier bridge heap is institute
The ground terminal for the rectification circuit stated.
Compared with the prior art, the advantages of the present invention are as follows circuit and controllable bleeder circuit, mould is arranged by Setting pattern
Formula setting circuit is used to be arranged the mode of light modulation toning, and Three models can be arranged in the mode setting circuit, and every
There are the correspondence variation relation of at least one brightness and colour temperature, Three models for one mode are as follows: when adjusting brightness, colour temperature is constant
Mode, when adjusting brightness, colour temperature increases linear increment mode with brightness and colour temperature with brightness increase is in when adjusting brightness
Linear decrease mode is operable to set the mode of mode setting circuit, dim by the switch to light modulator
In the state that device closes the switch, if first switch is disconnected, then within the set time again closing the switch, it is believed that carried out one
Secondary mode setting operation, mode setting operation of every progress, the brightness of mode setting circuit setting and the corresponding variation of colour temperature
Relationship switching is primary, when carrying out mode setting operation, if the brightness of mode setting circuit current setting and the correspondence of colour temperature
Variation relation is last a kind of correspondence variation relation of brightness and colour temperature under a certain mode, brightness at this time and colour temperature to strain
Change relationship is switched to the correspondence variation relation of the first brightness and colour temperature in next mode, otherwise, brightness and colour temperature to strain
Change relationship be adjusted to present intensity and the correspondence variation relation of colour temperature in present mode a kind of lower brightness and colour temperature to strain
Change relationship, and saved the correspondence variation relation of brightness and colour temperature after switching as default relationship, when being switched to the third mould
After the correspondence variation relation of a kind of last brightness and colour temperature under formula, then when carrying out mode setting operation, will again handoff to
The correspondence variation relation of the first brightness and colour temperature under one mode, in cycles, the first control terminal of mode setting circuit
According to the corresponding first control voltage of its present mode output, the second control terminal of mode setting circuit is according to according to its current mould
Formula output corresponding second controls voltage, is respectively arranged with the first control terminal voltage and its first output end in controllable bleeder circuit
It is linear between linear relationship and the second control terminal voltage between the voltage of output and the voltage of its second output terminal output
Relationship, so the output voltage of the first second output terminal of the controllable bleeder circuit, is arranged circuit according to slave pattern respectively
Output end access voltage respective correspondence is presented respectively with the effective voltage size of the rectification circuit output end
Variation.According to the mode that mode setting circuit is set, the first output end of controllable bleeder circuit exports corresponding voltage adjusting can
The first via electric current of the first output end output of constant-current circuit is dimmed to adjust the brightness of the first LED illuminating circuit, controllable partial pressure
The second output terminal of circuit exports the second road electric current that corresponding voltage adjusts the second output terminal output of tunable optical constant-current circuit
Adjust the brightness of the 2nd LED illuminating circuit, to realize that colour temperature is set, thus in actual use, there are many adjust by the present invention
Light toner pattern can choose one mode in these three modes by continuously switch operation for user's selection, user
Under a kind of brightness colour temperature correspond to variation relation as a kind of brightness colour temperature of actual use and correspond to variation relation, and continuously adjusting
Save brightness when, colour temperature according to selected brightness colour temperature correspond to variation relation also can continuously with brightness change or holding not
Become, the flexibility of color temperature adjustment is higher.
Detailed description of the invention
Fig. 1 is the structural block diagram of Dimmable LED circuit for lamp of the invention；
Fig. 2 is the circuit diagram of Dimmable LED circuit for lamp of the invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment: as shown in Figure 1, a kind of Dimmable LED circuit for lamp, including for mains AC to be converted to direct current
Press rectification circuit, the first LED illuminating circuit of high color temperature, the 2nd LED illuminating circuit of low color temperature and the tunable optical constant current of output
Circuit, rectification circuit have firewire input terminal, zero curve input, output end and ground terminal, the first LED illuminating circuit and second
LED illuminating circuit be respectively provided with anode and cathode, tunable optical constant-current circuit have input terminal, the first control terminal, the second control terminal,
First output end, second output terminal and ground terminal, the input terminal of tunable optical constant-current circuit, the first LED illuminating circuit anode and
The anode of 2nd LED illuminating circuit is connect with the output end of rectification circuit, the DC voltage of access rectification circuit output, adjustable
The cathode connection of the first output end and the first LED illuminating circuit of light constant-current circuit, the second output terminal of tunable optical constant-current circuit
It is connected with the cathode of the 2nd LED illuminating circuit, the first output end output the first LED illuminating circuit of control of tunable optical constant-current circuit
The first via electric current of luminous intensity, the voltage that the size of first via electric current is accessed by the first control terminal of tunable optical constant-current circuit
The adjusting of size, the second tunnel of second output terminal output the 2nd LED illuminating circuit luminous intensity of control of tunable optical constant-current circuit
Electric current, the adjusting for the voltage swing that the size of the second road electric current is accessed by the second control terminal of tunable optical constant-current circuit are special
Sign is that Dimmable LED circuit for lamp further includes mode setting circuit and controllable bleeder circuit, and mode setting circuit has anode, inspection
End, the first control terminal, the second control terminal and ground terminal are surveyed, controllable bleeder circuit has input terminal, the first control terminal, the second control
End, the first output end, second output terminal and ground terminal, the test side of mode setting circuit and the firewire input terminal of rectification circuit or
Zero curve input terminal connection, the input terminal of positive, the controllable bleeder circuit of mode setting circuit respectively with the output end of rectification circuit
Connection, the first control terminal of mode setting circuit connects with the first control terminal of controllable bleeder circuit, and the of mode setting circuit
Two control terminals are connected with the second control terminal of controllable bleeder circuit, the first output end and tunable optical Constant Electric Current of controllable bleeder circuit
First control terminal on road connects, and the second output terminal of controllable bleeder circuit is connected with the second control terminal of tunable optical constant-current circuit,
The ground terminal of mode setting circuit, the ground terminal of controllable bleeder circuit, the ground terminal of tunable optical constant-current circuit and rectification circuit
Ground terminal connection；Three kinds of light modulation tonings can be arranged for light modulation toner pattern, mode setting circuit to be arranged in mode setting circuit
Mode, and in each light modulation toner pattern, there are correspondence variation relation (brightness and the colour temperatures of at least one brightness and colour temperature
Correspondence variation relation preset according to design requirement), three kinds of light modulation toner patterns are as follows: the constant mould of colour temperature when adjusting brightness
Formula, when adjusting brightness, colour temperature increases with brightness in line colour temperature with the linear increment mode of brightness increase and when adjusting brightness
Property decline mode, is operable to set the mode of mode setting circuit, in light modulator by the switch to light modulator
In the state of closing the switch, if first switch is disconnected, then within the set time again closing the switch, it is believed that carried out primary
Mode setting operation, mode setting operation of every progress, the brightness of mode setting circuit setting and the corresponding variation of colour temperature are closed
System's switching is primary, when carrying out mode setting operation, if mode setting circuit current setting brightness and colour temperature to strain
Change relationship is last a kind of correspondence variation relation of brightness and colour temperature under a certain mode, the corresponding variation of brightness at this time and colour temperature
Relationship is switched to the correspondence variation relation of the first brightness and colour temperature in next mode, otherwise, the corresponding variation of brightness and colour temperature
Relationship is adjusted to lower a kind of corresponding variation of brightness and colour temperature of present intensity and the correspondence variation relation of colour temperature in present mode
Relationship, and saved the correspondence variation relation of brightness and colour temperature after switching as default relationship, when being switched to the third light modulation
After the correspondence variation relation of a kind of last brightness and colour temperature under toner pattern, then when carrying out mode setting operation, it will cut again
Change to the correspondence variation relation of the first brightness and colour temperature under the first mode, in cycles, the first of mode setting circuit
For control terminal according to the corresponding first control voltage of its present mode output, the second control terminal of mode setting circuit is current according to it
Mode output corresponding second controls voltage, and the first control terminal voltage and its first output are respectively arranged in controllable bleeder circuit
Hold the linear relationship between the voltage of output and the line between the second control terminal voltage and the voltage of its second output terminal output
Sexual intercourse, so the output voltage of the first second output terminal of controllable bleeder circuit, is arranged the defeated of circuit according to slave pattern respectively
Respective corresponding variation is presented with the effective voltage size of rectification circuit output end in the voltage of outlet access respectively.According to mould
The mode of circuit configuration is arranged in formula, and the first output end of controllable bleeder circuit exports corresponding voltage and adjusts tunable optical constant-current circuit
The first via electric current of the first output end output adjust the brightness of the first LED illuminating circuit, the second of controllable bleeder circuit is defeated
Outlet exports the second road electric current of the second output terminal output of corresponding voltage adjusting tunable optical constant-current circuit to adjust the 2nd LED
The brightness of illuminating circuit realizes colour temperature setting to realize.
In the present embodiment, as shown in Fig. 2, mode setting circuit includes first resistor R1, second resistance R2, first capacitor C1
With the first chip U1, the first chip U1 model S4223M, the 6th foot of the first chip U1 is the first control of mode setting circuit
End processed, the 1st foot of the first chip U1 are the second control terminal of mode setting circuit, the 3rd foot and second resistance of the first chip U1
One end of R2 connects, and the other end of second resistance R2 is the anode of mode setting circuit, the 4th foot of the first chip U1 and the first electricity
Hold one end connection of C1, the 5th foot of the first chip U1 is connected with one end of first resistor R1, and the other end of first resistor R1 is mould
The test side of circuit is arranged in formula, and the 2nd foot of the first chip U1 is connected with the other end of first capacitor C1 and its connecting pin is mode
The ground terminal of circuit is set.
In the present embodiment, as shown in Fig. 2, controllable bleeder circuit includes 3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, the 7th resistance R7 and first diode D1, first diode D1 are zener diode, 3rd resistor R3's
One end is the first control terminal of controllable bleeder circuit, and one end of the 4th resistance R4 is the second control terminal of controllable bleeder circuit, the
The other end of three resistance R3 and one end of the 6th resistance R6 connect and its connecting pin is the first output end of controllable bleeder circuit, the
The other end of four resistance R4 and one end of the 7th resistance R7 connect and its connecting pin is the second output terminal of controllable bleeder circuit, the
The other end of six resistance R6, the other end of the 7th resistance R7, one end of the 5th resistance R5 are connected with the cathode of first diode D1,
The other end of 5th resistance R5 is the input terminal of controllable divider resistance, and the just extremely controllable bleeder circuit of first diode D1 connects
Ground terminal.
In the present embodiment, as shown in Fig. 2, tunable optical constant-current circuit includes the 8th resistance R8, the 9th resistance R9, the tenth resistance
R10, eleventh resistor R11, twelfth resistor R12, the second capacitor C2, third capacitor C3, the second chip U2 and third chip U3,
The model RM9012D of the model SM088 of second chip U2, third chip U3, one end of the 8th resistance R8 and the 9th resistance
One end of R9 connects and its connecting pin is the input terminal of tunable optical constant-current circuit, the other end of the 8th resistance R8 and the second chip U2
The 1st foot connection, the 3rd foot of the second chip U2, one end of the second capacitor C2, one end of third capacitor C3, the tenth resistance R10
One end, one end of eleventh resistor R11, twelfth resistor R12 one end connected with the bottom electrode of third chip U3, third core
The 1st foot of piece U3 and the other end of the second capacitor C2 connect and its connecting pin is the first control terminal of tunable optical constant-current circuit, the
The 3rd foot of three chip U3 is connected with the other end of third capacitor C3 and its connecting pin is the second control of tunable optical constant-current circuit
End, the other end connection of the 2nd foot and the tenth resistance R10 of third chip U3, the 4th foot and eleventh resistor of third chip U3
The other end of R11 connects, and the 5th foot of third chip U3 is the second output terminal of tunable optical constant-current circuit, and the 6th of third chip U3 the
Foot is the first output end of tunable optical constant-current circuit, and the 8th foot of third chip U3 and the other end of the 9th resistance R9 connect, second
The 2nd foot of chip U2 is connected with the other end of twelfth resistor R12 and its connecting pin is the ground terminal of tunable optical constant-current circuit.
In the present embodiment, as shown in Fig. 2, rectification circuit is realized using full bridge rectifier bridge heap DB, full bridge rectifier bridge heap DB's
1st foot is the firewire input terminal of rectification circuit, and the 3rd foot of full bridge rectifier bridge heap DB is the zero curve input terminal of rectification circuit, full-bridge
The 2nd foot of rectifier bridge stack DB is the output end of rectification circuit, and the 4th foot of full bridge rectifier bridge heap DB is the ground terminal of rectification circuit.
In the present embodiment, as shown in Fig. 2, the first LED illuminating circuit uses series system by n high color temperature LED illuminator
It is formed by connecting, the 2nd LED illuminating circuit is formed by connecting by n low color temperature LED illuminator using series system, and n is more than or equal to 1
Integer.
Claims (5)
1. a kind of Dimmable LED circuit for lamp, including rectification circuit, the height for mains AC to be converted to direct voltage output
The 2nd LED illuminating circuit and tunable optical constant-current circuit of first LED illuminating circuit of colour temperature, low color temperature, the rectification circuit
With firewire input terminal, zero curve input, output end and ground terminal, the first LED illuminating circuit and the 2nd LED
Illuminating circuit is respectively provided with anode and cathode, and the tunable optical constant-current circuit has input terminal, the first control terminal, the second control
End, the first output end, second output terminal and ground terminal, the input terminal of the tunable optical constant-current circuit, the first LED hair
The anode of optical circuit and the anode of the 2nd LED illuminating circuit are connect with the output end of the rectification circuit, are accessed
The DC voltage of the rectification circuit output, the first output end of the tunable optical constant-current circuit and the first LED
The cathode connection of illuminating circuit, the second output terminal of the tunable optical constant-current circuit and the 2nd LED illuminating circuit
Cathode connection, the first output end output control of the tunable optical constant-current circuit the first LED illuminating circuit strong light
The size of the first via electric current of degree, the first via electric current is accessed by the first control terminal of the tunable optical constant-current circuit
Voltage swing adjusting, the second output terminal output control of the tunable optical constant-current circuit the 2nd LED shines electricity
Second road electric current of road luminous intensity, second control of the size of the second road electric current by the tunable optical constant-current circuit
System terminate into voltage swing adjusting, it is characterised in that the Dimmable LED circuit for lamp further include mode setting circuit and
Controllable bleeder circuit, the mode setting circuit have anode, test side, the first control terminal, the second control terminal and ground terminal,
The controllable bleeder circuit has input terminal, the first control terminal, the second control terminal, the first output end, second output terminal and connects
Ground terminal, the test side of the mode setting circuit are connect with the firewire input terminal of the rectification circuit or zero curve input terminal,
The input terminal output with the rectification circuit respectively of positive, described controllable bleeder circuit of the mode setting circuit
End connection, the first control terminal of the mode setting circuit are connected with the first control terminal of the controllable bleeder circuit, institute
Second control terminal of the mode setting circuit stated is connected with the second control terminal of the controllable bleeder circuit, and described controllable point
First output end of volt circuit is connected with the first control terminal of the tunable optical constant-current circuit, the controllable bleeder circuit
Second output terminal is connected with the second control terminal of the tunable optical constant-current circuit, the ground terminal of the mode setting circuit,
The ground connection of the ground terminal of the controllable bleeder circuit, the ground terminal of the tunable optical constant-current circuit and the rectification circuit
End connection.
Three kinds of light modulations can be arranged for light modulation toner pattern, the mode setting circuit to be arranged in the mode setting circuit
Toner pattern, and in each light modulation toner pattern, there are the correspondence variation relation of at least one brightness and colour temperature, three kinds of tune
Light toner pattern are as follows: when adjusting brightness the constant mode of colour temperature, when adjusting brightness, colour temperature with brightness increases linearly incremental mould
Formula and colour temperature with brightness increases linear decline mode when adjusting brightness is operable to pair by the switch to light modulator
The mode of the mode setting circuit is set, in the state of dimmer switch closure, if first switch is disconnected, so
Afterwards within the set time again closing the switch, it is believed that carry out a mode setting operation, mode setting operation of every progress,
The brightness of the mode setting circuit setting and the correspondence variation relation switching of colour temperature are primary, are carrying out mode setting operation
When, if the brightness of the mode setting circuit current setting and the correspondence variation relation of colour temperature are last under a certain mode
The correspondence variation relation of a kind of correspondence variation relation of brightness and colour temperature, at this time brightness and colour temperature is switched to first in next mode
The correspondence variation relation of kind brightness and colour temperature, otherwise, the correspondence variation relation of brightness and colour temperature is adjusted in present mode current
A kind of lower correspondence variation relation of brightness and colour temperature of the correspondence variation relation of brightness and colour temperature, and by after switching brightness and color
The correspondence variation relation of temperature is saved as default relationship, when the last a kind of brightness being switched under the third light modulation toner pattern with
After the correspondence variation relation of colour temperature, then when carrying out mode setting operation, the first that will again handoff under the first mode is bright
The correspondence variation relation of degree and colour temperature, in cycles, the first control terminal of the mode setting circuit is according to its present mode
Corresponding first control voltage is exported, the second control terminal of the mode setting circuit exports corresponding according to its present mode
Second controls voltage, and the first control terminal voltage and the output of its first output end are respectively arranged in the controllable bleeder circuit
Linear relationship between linear relationship and the second control terminal voltage between voltage and the voltage of its second output terminal output, institute
With the output voltage of the first second output terminal of the controllable bleeder circuit, the output end of circuit is set according to slave pattern respectively
Respective corresponding variation is presented with the effective voltage size of the rectification circuit output end in the voltage of access respectively.According to
The mode of the mode setting circuit setting, the first output end of the controllable bleeder circuit export corresponding voltage and adjust
The first via electric current of the first output end output of the tunable optical constant-current circuit adjusts the first LED illuminating circuit
Brightness, the second output terminal of the controllable bleeder circuit export that corresponding voltage adjusts the tunable optical constant-current circuit
Second road electric current of two output ends output adjusts the brightness of the 2nd LED illuminating circuit, realizes that colour temperature is set to realize
It is fixed.
2. a kind of LED lamp circuit of tunable optical according to claim 1, it is characterised in that the mode setting circuit packet
First resistor, second resistance, first capacitor and the first chip are included, first chip model is S4223M, described first
6th foot of chip is the first control terminal of the mode setting circuit, and the 1st foot of first chip is the mode
Second control terminal of circuit is set, the 3rd foot of first chip is connected with one end of the second resistance, and described
The other end of two resistance is the anode of the mode setting circuit, the 4th foot of first chip and first electricity
One end of appearance connects, and the 5th foot of first chip is connected with one end of the first resistor, the first resistor
The other end is the test side of the mode setting circuit, the 2nd foot of first chip and the first capacitor it is another
One end connection and its connecting pin are the ground terminal of the mode setting circuit.
3. a kind of LED lamp circuit of tunable optical according to claim 1, it is characterised in that the controllable bleeder circuit packet
3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and first diode are included, the first diode is
Zener diode, one end of the 3rd resistor are the first control terminal of the controllable bleeder circuit, the 4th electricity
One end of resistance is the second control terminal of the controllable bleeder circuit, the other end of the 3rd resistor and the 6th electricity
One end of resistance connects and its connecting pin is the first output end of the controllable bleeder circuit, the other end of the 4th resistance
It is connected with one end of the 7th resistance and its connecting pin is the second output terminal of the controllable bleeder circuit, described the
The other end of six resistance, the other end of the 7th resistance, one end of the 5th resistance and the first diode
Cathode connection, the other end of the 5th resistance is the input terminal of the controllable divider resistance, the one or two pole
The ground terminal of the just extremely described controllable bleeder circuit of pipe.
4. a kind of LED lamp circuit of tunable optical according to claim 1, it is characterised in that the tunable optical constant-current circuit
Including the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, the second capacitor, third capacitor, the second core
Piece and third chip, the model SM088 of second chip, the model RM9012D of the third chip are described
One end of 8th resistance is connected with one end of the 9th resistance and its connecting pin is the defeated of the tunable optical constant-current circuit
Entering end, the other end of the 8th resistance is connected with the 1st foot of second chip, the 3rd foot of second chip,
One end of second capacitor, one end of the third capacitor, one end of the tenth resistance, the 11st electricity
One end of resistance, the twelfth resistor one end connected with the bottom electrode of the third chip, the third chip
The 1st foot connected with the other end of second capacitor and its connecting pin be the tunable optical constant-current circuit first control
End, the 3rd foot of the third chip is connected with the other end of the third capacitor and its connecting pin is the tunable optical
2nd foot of the second control terminal of constant-current circuit, the third chip is connected with the other end of the tenth resistance, described
4th foot of third chip is connected with the other end of the eleventh resistor, and the 5th foot of the third chip can for described
Dim the second output terminal of constant-current circuit, the 6th foot of the third chip is the first defeated of the tunable optical constant-current circuit
8th foot of outlet, the third chip is connected with the other end of the 9th resistance, the 2nd foot of second chip
It is connected with the other end of the twelfth resistor and its connecting pin is the ground terminal of the tunable optical constant-current circuit.
5. a kind of LED lamp circuit of tunable optical according to claim 1, it is characterised in that the rectification circuit is using complete
Bridge rectifier bridge stack realizes that the 1st foot of the full bridge rectifier bridge heap is the firewire input terminal of the rectification circuit, and described is complete
3rd foot of bridge rectifier bridge stack is the zero curve input terminal of the rectification circuit, and the 2nd foot of the full bridge rectifier bridge heap is described
Rectification circuit output end, the 4th foot of the full bridge rectifier bridge heap is the ground terminal of the rectification circuit.
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| CN110536511B (en) | 2021-06-11 |
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