CN108834265A - Dimmable lighting device and light adjusting circuit - Google Patents
Dimmable lighting device and light adjusting circuit Download PDFInfo
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- CN108834265A CN108834265A CN201810962140.5A CN201810962140A CN108834265A CN 108834265 A CN108834265 A CN 108834265A CN 201810962140 A CN201810962140 A CN 201810962140A CN 108834265 A CN108834265 A CN 108834265A
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- switch
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- control circuit
- illuminating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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 present invention relates to a kind of Dimmable lighting device and light adjusting circuit, Dimmable lighting device includes first control circuit and the first illuminating circuit and the second illuminating circuit in parallel；First illuminating circuit includes concatenated first light source and first switch；Second illuminating circuit includes concatenated second light source and second switch；It further include second control circuit and third switch, third switch is connected with the first illuminating circuit and the second illuminating circuit respectively；First control circuit is used for so that one and only one in first switch and the second switch is connected；Second control circuit is also used to control the conducting of third switch.Second control circuit passes through pwm signal, control to the luminous brightness of first light source and second light source, first control circuit controls the ratio of the turn-on time of first switch and the second switch, realize color temperature adjustment, it avoids two-way pwm signal while exporting high level or low level, avoid the case where causing power overload situation or light to flash since power is double.
Description
Technical field
The present invention relates to Lighting control fields, more particularly to a kind of Dimmable lighting device and light adjusting circuit.
Background technique
In order to adapt to indoor different lighting demand, existing LED (Light Emitting Diode) headlamp all has
Standby color temperature adjustment function.Traditional headlamp for having color temperature adjustment function, is usually made of white lamp and amber light, and white lamp issues white
The light of color, amber light issue the light of yellow, by controlling the light emission luminance of white lamp and amber light so that white light and yellow light with
The ratio of different brightness is mixed, to realize that the colour temperature of headlamp is adjusted.
In order to realize dialogue lamp and amber light light emission luminance control, need respectively to white lamp and amber light input PWM
(Pulse Width Modulation, pulse width modulation) signal, two-way pwm signal will misplace and export low and high level, in order to avoid
Export simultaneously it is bright cause power double suddenly and power overload situation occur or the case where light flashes, but current certain control moulds
Block or circuit will appear two-way pwm signal when powering on while exporting high or low level, double and go out suddenly so as to cause power
Existing power overload situation or light flash.
Summary of the invention
Based on this, it is necessary to provide a kind of Dimmable lighting device and light adjusting circuit.
A kind of Dimmable lighting device, the first illuminating circuit including first control circuit and for being parallel to both ends of power
And second illuminating circuit；
First illuminating circuit includes concatenated first light source and first switch；
Second illuminating circuit includes concatenated second light source and second switch；
The first control circuit is used to control the on-off of the first switch and the second switch,
Further include second control circuit and third switch, third switch respectively with first illuminating circuit and institute
State the series connection of the second illuminating circuit；
The first control circuit is used for so that one and only one in the first switch and the second switch is connected；
The second control circuit is also used to control the conducting of the third switch.
The first control circuit makes in the first switch and the second switch in one of the embodiments,
And only conducting is realized by controlling signal and circuit for reversing all the way.
The first control circuit is opened with described first respectively by same signal output end in one of the embodiments,
It closes and circuit for reversing connection, the circuit for reversing is connected with the second switch.
The circuit for reversing includes triode in one of the embodiments, and the first control circuit passes through described three
Pole pipe is connect with the second switch.
In one of the embodiments, the first switch and the second switch be respectively field-effect tube, triode and
One of IGBT.
A kind of light adjusting circuit, including first control circuit and for being opened from the concatenated first switch of different light sources and second
It closes, the first switch and the second switch are in parallel, and the first control circuit is for controlling the first switch and described
The on-off of second switch,
The light adjusting circuit further includes second control circuit and third switch, and the third switch is opened with described first respectively
It closes and the second switch is connected；
The first control circuit is used for so that having in the first switch and the second switch and being only connected；
The second control circuit is also used to control the conducting of the third switch.
The first control circuit makes in the first switch and the second switch in one of the embodiments,
And only conducting is realized by controlling signal and circuit for reversing all the way.
The first control circuit is opened with described first respectively by same signal output end in one of the embodiments,
It closes and circuit for reversing connection, the circuit for reversing is connected with the second switch.
The circuit for reversing includes triode in one of the embodiments, and the first control circuit passes through described three
Pole pipe is connect with the second switch.
In one of the embodiments, the first switch and the second switch be respectively field-effect tube, triode and
One of IGBT.
In above-mentioned Dimmable lighting device and light adjusting circuit, second control circuit is realized by output pwm signal to first
The control of the luminous brightness of light source and second light source, the conducting of cooperation first control circuit control first switch and the second switch
The ratio of time and turn-off time realize bright so that first light source and second light source are mixed with the ratio of different brightness
Degree or color temperature adjustment can effectively avoid two-way pwm signal while export using control mode unlike the prior art
High level exports low level simultaneously, avoids the case where causing power overload situation or light to flash since power is double,
So that illumination is more stable.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the Dimmable lighting device of one embodiment；
Fig. 2 is the circuit diagram of the Dimmable lighting device of one embodiment；
Fig. 3 is the circuit diagram of the control module of one embodiment；
Fig. 4 is the circuit diagram of the switching power circuit of one embodiment；
Fig. 5 is the circuit diagram of the control module power supply circuit of one embodiment；
Fig. 6 is the timing diagram of the output signal of the first control circuit and second control circuit in one embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term used herein is intended merely to the mesh of description specific embodiment
, it is not intended that in the limitation present invention.
Referring to Fig. 1, in one embodiment, providing a kind of Dimmable lighting device, including 110 He of first control circuit
For being parallel to the first illuminating circuit and the second illuminating circuit of both ends of power；First illuminating circuit includes concatenated
One light source led 1 and first switch Q1；Second illuminating circuit includes concatenated second light source LED2 and second switch Q2；Institute
First control circuit 110 is stated for controlling the on-off of the first switch Q1 and the second switch Q2, further includes the second control
Circuit 120 and third switch Q3, the third switch Q3 respectively with first illuminating circuit and second illuminating circuit
Series connection；The first control circuit 110 is used for so that one and only one in the first switch Q1 and second switch Q2
Conducting；The second control circuit 120 is also used to control the conducting of the third switch Q3.
In the present embodiment, the first illuminating circuit and the second illuminating circuit are in parallel, and the first illuminating circuit and the second luminous electricity
It connects after road is in parallel with third switch, specifically, for connecting with one end of power supply, first shines for one end of the first illuminating circuit
The other end of circuit is connect with the first end that third switchs, and one end of the second illuminating circuit is used to connect with one end of power supply, the
The other end of two illuminating circuits is connect with the first end that third switchs, and the second end of third switch is used to connect with the other end of power supply
It connects.
First illuminating circuit includes first light source and first switch, and first light source and first switch are connected, the second luminous electricity
Road includes second light source and second switch, second light source and second switch series connection, wherein first light source and second light source are electroluminescent
Luminescent device, first light source and second light source shine after being powered.In the present embodiment, first light source and second light source are LED light.
In the present embodiment, first switch and the second switch is electronic switch, the first end and second end series connection of electronic switch
In circuit, control terminal is connect with first control circuit, and first control circuit is believed by inputting to the control terminal of electronic switch
Number, so that first switch and the second switch is switched on or off, and then realize to the first illuminating circuit and the second illuminating circuit
The control of on-off, so that first light source and second light source are turned on or off.
First control circuit is used to export control signal to first switch and the second switch, and second control circuit is used for the
Three switch output control signals, first control circuit and second control circuit output control signal can be implemented by using the prior art,
Its principle is one high level of output outward or exports low level outward.In this regard, not burdensome description in the present embodiment.
In the present embodiment, first control circuit be used for so that having in the first switch and the second switch and only
One conducting, i.e. first control circuit are used for one of conducting so that the first switch and the second switch, and only
There is a conducting, in other words, first control circuit is used for so that one of them of the first switch and the second switch are led
It is logical, another disconnection, that is to say, that first switch and the second switch turn-on time mutually staggers, at any one time, first switch
Only has a conducting with second switch.In this way, one and only one conducting of the first illuminating circuit and the second illuminating circuit, so that the
One and only one in one light source and second light source is lighted.
In the present embodiment, the tunable optical of headlamp, but brightness is adjusted, it is also possible to adjust colour temperature.Specifically, second
Control circuit is used to export PWM (Pulse Width Modulation, pulse width modulation) signal, second control circuit
Pwm signal control third switches on-off, and realizes the control of the brightness to first light source and second light source.First control circuit control
The turn-on time of first switch and the second switch processed and the ratio of turn-off time so that first light source and second light source shine with
The ratio of different brightness is mixed, and brightness regulation can be realized, and can also realize color temperature adjustment.
In the present embodiment, the luminescent color of first light source and second light source is different, i.e. the wavelength of the light of first light source sending
Unequal with the wavelength of the light of second light source sending, in one embodiment, first light source is white LED lamp, and second light source is
Yellow light LED lamp, second control circuit controls the conducting and disconnection that third switchs by pwm signal, and then controls white LED lamp
The brightness of brightness and yellow light LED lamp, the turn-on time of cooperation first control circuit control first switch and the second switch and disconnection
The ratio of time realizes color temperature adjustment so that the ratio with different brightness of white LED lamp and yellow light LED lamp is mixed.
Traditional color temperature adjustment respectively controls two LED light using the pwm signal of two-way, in the application, it is only necessary to one
The control of colour temperature can be realized in pwm signal, and the mixed proportion of the light of two kinds of colors can be by first switch and the second switch
Turn-on time carries out control acquisition, so that control is more flexible.
In the present embodiment, due to only controlling the conducting and disconnection of third switch by pwm signal all the way, and in addition all the way
Control signal be used to control the channel of first switch and the second switch, in this way, the PWM that first light source and second light source receive
Signal always only have second control signal output that all the way, can effectively avoid two-way pwm signal at the same export high level or
Person exports low level simultaneously, avoids the case where causing power overload situation or light to flash since power is double, so that illumination
It is more stable.
It is noted that first control circuit is used to export control signal, the second control to first switch and the second switch
Circuit processed is used to switch output control signal to third, and first control circuit and second control circuit export different control respectively
Signal is also possible to integrated in this way, first control circuit and second control circuit can be respectively two independent circuits
Circuit in one embodiment, provides control module, and control module includes first control circuit and second control circuit, controls mould
Block exports the control signal of two-way, is exported all the way to first switch and the second switch, another output to third switchs, this implementation
In example, the control signal of control module output two-way is that the control signal that first control circuit exports and second control circuit are defeated
Control signal out.In one embodiment, first control circuit and second control circuit are integrated in a control module, this
In embodiment, control module is control chip, the pin output of the control chip all the way signal to first switch and second
Switch, signal to third switchs the output of another pin all the way.
In order to realize to the control of the on-off of first switch and the second switch, in one of the embodiments, as shown in Figure 1,
The first control circuit 110 makes having in the first switch Q1 and the second switch Q2 and only conducting be by one
Road controls signal and circuit for reversing 130 is realized.In the present embodiment, first control circuit has a signal output end, the signal
Output end output controls signal all the way, and the control signal and the signal by reversion are respectively sent to first switch and second and open
It closes, in such manner, it is possible to which first switch and the second switch is made to receive opposite signal, therefore, first switch and the second switch respectively
In one conducting, and another disconnect so that being lighted when first light source and second light source difference.It is noted that anti-
Shifting circuit is alternatively referred to as signal circuit for reversing or negater circuit, for inverting signal, in the present embodiment, controls signal
Reversion refers to for high level being reversed to low level, or low level is reversed to high level.
In order to realize the reversion of control signal, the first control circuit passes through same letter in one of the embodiments,
Number output end is connect with the first switch and the circuit for reversing respectively, and the circuit for reversing and the second switch connect
It connects.Specifically, in the present embodiment, the signal output end of first control circuit and the control terminal of first switch are connected, and the signal
Output end also passes through circuit for reversing and the control terminal of second switch connects, in this way, first control circuit is defeated by signal output end
Signal is controlled out, which is sent to the control terminal of first switch, and is sent to second by the reversion of circuit for reversing
Switch, in this way, the signal that first switch and the second switch receives is opposite signal, so that the first switch and institute
One and only one in second switch is stated to be connected.
In order to realize the reversion of control signal, the circuit for reversing includes triode in one of the embodiments, described
First control circuit is connect by the triode with the second switch.Specifically, as shown in Fig. 2, first control circuit
Signal output end is connect with the base stage of triode Q4, and the collector of triode and the control terminal of second switch connect, triode
For being grounded, the signal output end of first control circuit is also connect with the control terminal of first switch emitter, in this way, the first control
The same control signal of the signal output end output of circuit, is sent to the control terminal of first switch, and also pass through triode
Reversion be sent to the control terminal of second switch so that first switch and the second switch received signal is on the contrary, make described
One and only one conducting in one switch and the second switch.
In one embodiment, incorporated by reference to Fig. 2 and Fig. 6, second control circuit exports PWM2 signal, first control circuit output
PWM1 signal, third switch are connected when PWM2 signal is high level, and first switch is connected when PWM2 signal is high level, by
Signal after the control signal that second switch receives is the reversion of PWM1 signal, therefore, it is low for instilling switch in PWM1 signal
Electric conducts, in this way, since the PWM1 signal of first control circuit output is only used in control first switch and the second switch
One of conducting so that with the concatenated first light source of first switch and with the concatenated second light source of second switch only by one
A PWM2 signal carries out control brightness, even if PWM1 signal and PWM2 signal are high level or are simultaneously low level simultaneously, two
A signal will not carry out power superposition, in such manner, it is possible to effectively avoid two-way pwm signal while exporting high level or defeated simultaneously
Low level out avoids the case where causing power overload situation or light to flash since power is double, so that illumination is more stable.
In order to realize the reversion of control signal, in one embodiment, circuit for reversing includes phase inverter, first control
Circuit is connect with the input terminal of the phase inverter, and the output end of the phase inverter is connect with the control terminal of the second switch.?
In one embodiment, circuit for reversing is digit reverse circuit, the input of the first control circuit and the digit reverse circuit
End connection, the output end of the digit reverse circuit are connect with the control terminal of the second switch.It is noted that phase inverter
It can be implemented by using the prior art with digital negater circuit, in the present embodiment, not burdensome description passes through phase inverter or digit reverse
Circuit to control signal reversion so that first switch and the second switch received signal on the contrary, make the first switch and
One and only one in the second switch is connected.
In order to realize the control of the on-off to the first illuminating circuit and the second illuminating circuit, in one of the embodiments,
The first switch and the second switch are respectively one of field-effect tube, triode and IGBT.That is, the first switch
For field-effect tube, triode and IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor)
One of, the second switch is respectively one of field-effect tube, triode and IGBT.It is noted that first opens
It closes and second switch is using any one in field-effect tube, triode and IGBT, be connected on the first illuminating circuit and the second hair
In optical circuit, and the control terminal of the two is connect with the signal output end of first control circuit and circuit for reversing respectively, and first opens
It closes and the effect of second switch is to realize the control being switched on or off to the first illuminating circuit and the second illuminating circuit, connection
It can be configured according to the practical connection structure of circuit, connection structure can be achieved by the prior art, and not tire out in the present embodiment
Superfluous description.
Control is switched on-off to third in order to realize, in one embodiment, the third switch is respectively field-effect
One of pipe, triode and IGBT.In the present embodiment, third switch and the first illuminating circuit and the second illuminating circuit string
Connection, the control terminal of third switch and the signal output end of second control circuit connect, in this way, second control circuit is by third
Output pwm signal is switched, so that third switch conduction or disconnection, so that the first light source of the first illuminating circuit and the second hair
The brightness of second light source on optical circuit is controlled.The third switchs the on-off for controlling main line, and connection can be according to electricity
The practical connection structure on road is configured, and connection structure can be achieved by the prior art, not burdensome description in the present embodiment.
In one embodiment, a kind of light adjusting circuit is provided, including first control circuit and is used for and different string of lights
The first switch and the second switch of connection, the first switch and the second switch are in parallel, and the first control circuit is for controlling
The on-off of the first switch and the second switch is made, the light adjusting circuit further includes that second control circuit and third switch,
The third switch is connected with the first switch and the second switch respectively；The first control circuit is used for so that institute
Stating in first switch and the second switch has and is only connected；The second control circuit is also used to control the third switch
Conducting.
In the present embodiment, first switch and the second switch is connected in different circuits, and respectively from different string of lights
Connection, the luminescent color for being connected on the light source of the circuit where first switch and the second switch is different, i.e. the light that two light sources issue
Wavelength it is unequal, one embodiment is, first switch for connect with first light source, second switch for and second light source string
Connection.Circuit in parallel where circuit where first switch and second switch, and where circuit where first switch and second switch
It connects after circuit in parallel with third switch, i.e., first switch is connected on a branch, and second switch is connected on another branch, the
Three switches are connected on main line, and the both ends on main line with the both ends of power supply for connecting respectively.
In use, one end of circuit where one end of circuit where first switch and second switch is connected to power supply
Third switch is connected to the other end of power supply, circuit where two different light sources are connected on first switch respectively by one end
With circuit where second switch, after energization, second control circuit controls the conducting and disconnection that third switchs by pwm signal, into
And the brightness of two light sources is controlled, when cooperation first control circuit controls turn-on time and the disconnection of first switch and the second switch
Between ratio realize color temperature adjustment so that two light sources are mixed with the ratio of different brightness.Traditional color temperature adjustment,
Two LED light are controlled respectively using the pwm signal of two-way, in the application, it is only necessary to which a pwm signal can be realized
The control of colour temperature, the mixed proportion of the light of two kinds of colors can be controlled by the turn-on time to first switch and the second switch
System obtains, so that control is more flexible.
In order to realize the on-off control to first switch and the second switch, first control in one of the embodiments,
Circuit processed makes having in the first switch and the second switch and only conducting be by controlling signal and reversion all the way
Circuit is realized.In the present embodiment, first control circuit has a signal output end, and control is believed all the way for signal output end output
Number, the control signal and the signal by reversion are respectively sent to first switch and the second switch, in such manner, it is possible to make first
Switch and second switch receive opposite signal respectively, therefore, a conducting in first switch and the second switch, and other one
A disconnection, so that being lighted when two light source differences.It is noted that circuit for reversing is alternatively referred to as signal circuit for reversing, or
Negater circuit, for inverting signal, in the present embodiment, the reversion for controlling signal refers to high level being reversed to low level,
Or low level is reversed to high level.
In order to realize the reversion of control signal, the first control circuit passes through same letter in one of the embodiments,
Number output end is connect with the first switch and the circuit for reversing respectively, and the circuit for reversing and the second switch connect
It connects.Specifically, in the present embodiment, the signal output end of first control circuit and the control terminal of first switch are connected, and the signal
Output end also passes through circuit for reversing and the control terminal of second switch connects, in this way, first control circuit is defeated by signal output end
Signal is controlled out, which is sent to the control terminal of first switch, and is sent to second by the reversion of circuit for reversing
Switch, in this way, the signal that first switch and the second switch receives is opposite signal, so that the first switch and institute
One and only one in second switch is stated to be connected.
In order to realize the reversion of control signal, the circuit for reversing includes triode in one of the embodiments, described
First control circuit is connect by the triode with the second switch.Specifically, as shown in Fig. 2, first control circuit
Signal output end is connect with the base stage of triode Q4, and the collector of triode and the control terminal of second switch connect, triode
For being grounded, the signal output end of first control circuit is also connect with the control terminal of first switch emitter, in this way, the first control
The same control signal of the signal output end output of circuit, is sent to the control terminal of first switch, and also pass through triode
Reversion be sent to the control terminal of second switch so that first switch and the second switch received signal is on the contrary, make described
One and only one conducting in one switch and the second switch.
In order to realize the reversion of control signal, in one embodiment, circuit for reversing includes phase inverter, first control
Circuit is connect with the input terminal of the phase inverter, and the output end of the phase inverter is connect with the control terminal of the second switch.?
In one embodiment, circuit for reversing is digit reverse circuit, the input of the first control circuit and the digit reverse circuit
End connection, the output end of the digit reverse circuit are connect with the control terminal of the second switch.It is noted that phase inverter
It can be implemented by using the prior art with digital negater circuit, in the present embodiment, not burdensome description passes through phase inverter or digit reverse
Circuit to control signal reversion so that first switch and the second switch received signal on the contrary, make the first switch and
One and only one in the second switch is connected.
In order to realize the control of the on-off to the first illuminating circuit and the second illuminating circuit, in one of the embodiments,
The first switch and the second switch are respectively one of field-effect tube, triode and IGBT.That is, the first switch
For field-effect tube, triode and IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor)
One of, the second switch is respectively one of field-effect tube, triode and IGBT.It is noted that first opens
It closes and second switch is using any one in field-effect tube, triode and IGBT, be connected on the first illuminating circuit and the second hair
In optical circuit, and the control terminal of the two is connect with the signal output end of first control circuit and circuit for reversing respectively, and first opens
It closes and the effect of second switch is to realize the control being switched on or off to circuit, connection can be according to the practical connection knot of circuit
Structure is configured, and connection structure can be achieved by the prior art, not burdensome description in the present embodiment.
Control is switched on-off to third in order to realize, in one embodiment, the third switch is respectively field-effect
One of pipe, triode and IGBT.In the present embodiment, third switch and circuit where first switch and second switch place
Circuit series connection, the control terminal of third switch and the signal output end of second control circuit connect, in this way, second control circuit passes through
Output pwm signal is switched to third, so that third switch conduction or disconnection, so that the brightness of two light sources is controlled.It should
Third switchs the on-off for controlling main line, and connection can be configured according to the practical connection structure of circuit, connection structure
It can be achieved by the prior art, not burdensome description in the present embodiment.
Here is a specific embodiment：
In the present embodiment, in conjunction with Fig. 2 to Fig. 5, switching power circuit 410, control module power supply circuit 420 and can are provided
Brightness-adjusting lighting device, Dimmable lighting device include control module 300, third switch Q3, the first illuminating circuit and the second hair
Optical circuit, first illuminating circuit include concatenated first light source and first switch Q1, and second illuminating circuit includes string
The second light source LED2 and second switch Q2 of connection.In the present embodiment, first light source LED1 is white LED lamp, second light source LED2
For yellow light LED lamp.In the present embodiment, one end of power supply is the cathode output end of switching power circuit, and the other end of power supply is ground
End.
In the present embodiment, the control function of first control circuit and second control circuit is integrated in the control module, control
Module is control chip, the model WIFI ESP-WROOM-02D of the control chip.
The cathode output end of switching power circuit is connect with the first illuminating circuit and the second illuminating circuit respectively, controls mould
The output end of block power supply circuit with control chip power pin connect, switching power circuit for be the first illuminating circuit and
The power supply of second illuminating circuit, control module power supply circuit are used for as control chip power supply.
Specifically, the anode and second light source of the cathode output end LED+ and first light source LED1 of switching power circuit
The anode connection of LED2, the cathode of first light source LED1 are connect with the first end of first switch Q1, the second end of first switch Q1
It is connect with the first end of third switch Q3, the cathode of second light source LED2 is connect with the first end of second switch Q2, second switch
The second end of Q2 is connect with the first end of third switch Q3, and the second end of third switch Q3 is for being grounded；Control chip ESP-
The first control pin of WROOM-02D is connect by resistance R13 with the control terminal of third switch Q3, the control terminal of third switch Q3
Also it is grounded by resistance R14；The the second control pin for controlling chip ESP-WROOM-02D passes through resistance R10 and first switch Q1
Control terminal connection, the second control pin of control chip ESP-WROOM-02D also passes through the base stage of resistance R15 Yu triode Q4
Connection, the collector of triode Q4 are connect with the control terminal of second switch Q2, and the emitter of triode Q4 is for being grounded, triode
The collector of Q4 also passes through resistance R16 and connect with the output end of control module power supply circuit, and the control terminal of second switch Q2 passes through
Resistance R9 is connect with the first end of third switch Q3.
In the present embodiment, switching power circuit is that the first illuminating circuit and the second illuminating circuit are powered, and controls chip
ESP-WROOM-02D controls the conducting and disconnection of third switch Q3 by the first control pin output pwm signal, so that
First illuminating circuit and the conducting of the second illuminating circuit and disconnection, and then realize to the bright of first light source LED1 and second light source LED2
The control of degree, and control chip ESP-WROOM-02D by second control pin output control signal, control first switch Q1 and
The conducting and disconnection of second switch Q2, the second control pin output control signal are sent to first switch Q1's by resistance R10
Control terminal, and pass through the reversion of triode Q4, so that the control terminal of second switch Q2 receives the control with first switch Q1
Opposite signal is held, so that one and only one conducting of first switch Q1 and second switch Q2, so that first light source LED1
It is connected with one and only one in second light source LED2, by the control signal of the second control pin output, controls first switch
The ratio of the turn-on time and turn-off time of Q1 and second switch Q2, so that first light source LED1 and second light source LED2 are with difference
The ratio of brightness is mixed, and color temperature adjustment is realized.
It is noted that switching power circuit and control module power supply circuit can be implemented by using the prior art.At one
In embodiment, as shown in figure 4, switching power circuit includes rectifier bridge BD1, control chip MST3212 and inductance T1A, rectifier bridge
The first input end of BD1 and the second input terminal are respectively used to connection alternating current, and the first output end of rectifier bridge BD1 is used to be grounded,
The second output terminal of rectifier bridge BD1 is connect by inductance L1 with control chip MST3212, and the efferent duct of chip MST3212 is controlled
Foot connect by inductance T1A with control module power supply circuit, and the output pin for controlling chip MST3212 pass through inductance T1A and
First illuminating circuit and the connection of the second illuminating circuit.
As shown in figure 5, control module power supply circuit includes control chip MST5018, inductance L2, capacitor C8, chip is controlled
The input pin and enable pin of MST5018 is connect with switching power circuit respectively, and the output pin of control chip MST5018 is logical
It crosses inductance L2 and is connect with the power input pin for controlling chips W IFI ESP-WROOM-02D, control the output of chip MST5018
Pin also passes sequentially through inductance L2 and capacitor C8 ground connection.
Switching power circuit and control module power supply circuit in above-described embodiment, the only control as Dimmable lighting device
One example of the power supply of molding block, the first illuminating circuit and the second illuminating circuit, realizing can also be existing using other
Power supply circuit realize, not burdensome description in the present embodiment.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of Dimmable lighting device, the first illuminating circuit including first control circuit and for being parallel to both ends of power with
And second illuminating circuit；
First illuminating circuit includes concatenated first light source and first switch；
Second illuminating circuit includes concatenated second light source and second switch；
The first control circuit is used to control the on-off of the first switch and the second switch, which is characterized in that
Further include second control circuit and third switch, third switch respectively with first illuminating circuit and described the
The series connection of two illuminating circuits；
The first control circuit is used for so that one and only one in the first switch and the second switch is connected；
The second control circuit is also used to control the conducting of the third switch.
2. Dimmable lighting device according to claim 1, which is characterized in that the first control circuit makes described
Having in one switch and the second switch and only conducting are realized by controlling signal and circuit for reversing all the way.
3. Dimmable lighting device according to claim 2, which is characterized in that the first control circuit passes through same letter
Number output end is connect with the first switch and the circuit for reversing respectively, and the circuit for reversing and the second switch connect
It connects.
4. Dimmable lighting device according to claim 2, which is characterized in that the circuit for reversing includes triode, institute
First control circuit is stated to connect by the triode with the second switch.
5. Dimmable lighting device described in -4 any one according to claim 1, which is characterized in that the first switch and institute
Stating second switch is respectively one of field-effect tube, triode and IGBT.
6. a kind of light adjusting circuit, including first control circuit and for being opened from the concatenated first switch of different light sources and second
It closes, the first switch and the second switch are in parallel, and the first control circuit is for controlling the first switch and described
The on-off of second switch, which is characterized in that
The light adjusting circuit further includes second control circuit and third switch, third switch respectively with the first switch with
And the second switch series connection；
The first control circuit is used for so that having in the first switch and the second switch and being only connected；
The second control circuit is also used to control the conducting of the third switch.
7. light adjusting circuit according to claim 6, which is characterized in that the first control circuit makes the first switch
It with having in the second switch and only conducting is realized by controlling signal and circuit for reversing all the way.
8. light adjusting circuit according to claim 7, which is characterized in that the first control circuit is exported by same signal
End is connect with the first switch and the circuit for reversing respectively, and the circuit for reversing is connected with the second switch.
9. light adjusting circuit according to claim 7, which is characterized in that the circuit for reversing includes triode, and described first
Control circuit is connect by the triode with the second switch.
10. according to light adjusting circuit described in claim any one of 6-9, which is characterized in that the first switch and described
Two switches are respectively one of field-effect tube, triode and IGBT.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962140.5A CN108834265A (en) | 2018-08-22 | 2018-08-22 | Dimmable lighting device and light adjusting circuit |
| PCT/CN2018/110977 WO2020037807A1 (en) | 2018-08-22 | 2018-10-19 | Dimmable illumination device and dimming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962140.5A CN108834265A (en) | 2018-08-22 | 2018-08-22 | Dimmable lighting device and light adjusting circuit |
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|---|---|
| CN108834265A true CN108834265A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810962140.5A Pending CN108834265A (en) | 2018-08-22 | 2018-08-22 | Dimmable lighting device and light adjusting circuit |
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|---|---|
| CN (1) | CN108834265A (en) |
| WO (1) | WO2020037807A1 (en) |
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| CN109496013A (en) * | 2018-11-21 | 2019-03-19 | 深圳和而泰智能照明有限公司 | LED colour temperature adjusts circui and device |
| CN111770604A (en) * | 2019-03-29 | 2020-10-13 | 隆达电子股份有限公司 | Light emitting device and control method thereof |
| CN113012632A (en) * | 2021-02-25 | 2021-06-22 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
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| CN114269040B (en) * | 2021-12-27 | 2024-03-19 | 河北谊安奥美医疗设备有限公司 | LED shadowless lamp light effect adjusting method and system |
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| Publication number | Publication date |
|---|---|
| WO2020037807A1 (en) | 2020-02-27 |
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