CN207766600U - A kind of combinational circuit and control circuit - Google Patents
A kind of combinational circuit and control circuit Download PDFInfo
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- CN207766600U CN207766600U CN201721671367.1U CN201721671367U CN207766600U CN 207766600 U CN207766600 U CN 207766600U CN 201721671367 U CN201721671367 U CN 201721671367U CN 207766600 U CN207766600 U CN 207766600U
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Abstract
The utility model provides a kind of combinational circuit and control circuit, and combinational circuit is applied in LED drive circuit, including detection module and driving connected to it and logical transition module.Wherein, detection module detects external switch state, and detection signal is generated according to the external switch state detected, and detection signal is sent to driving and logical transition module.Driving and logical transition module receive the detection signal for carrying out self-detection module, and generate drive signal according to detection signal, utilize the working condition for the discharge module that the state-driven of drive signal is used to discharge to the output electrolytic capacitor of LED drive circuit.Thus, the utility model embodiment is cooperated jointly using detection module and driving and logical transition module, driving discharge module discharges to the output electrolytic capacitor of LED drive circuit, to LED light source be made to generate flicker when luminous due to the residual amount of energy on output electrolytic capacitor.
Description
Technical field
The utility model is related to lighting technical fields, more particularly to a kind of combinational circuit and control circuit.
Background technology
Since LED has many advantages, such as energy-saving and environmental protection, efficient and safe, be widely used in landscape, street lamp and
In electronic product backlight.With the extensive use of LED, in the market to being needed using the product of switching LED colour temperatures or brightness
Ask also more and more, still, the product using switching LED colour temperatures or brightness in actual use, especially pair
In the LED product of High Power Factor, when using switching LED colour temperatures or brightness, the problem of flicker there are LED light, from
And it gives and causes poor usage experience using the user of LED product.
For example, when switching LED colour temperatures using circuit shown in FIG. 1, just there are problems that LED flickers.First, the electricity is introduced
The operation principle on road, it is assumed that it is bright that LED product is defaulted as initial White LED (WLED- indicates White LED in Fig. 1).At the beginning of circuit
Secondary when powering on, DRV_W (wherein, DRV, that is, driver, drive signal, DRV_W refer to the drive signal for being input to White LED) is height
Level, DRV_Y (referring to the drive signal for being input to yellow led) are low level, and switching tube (such as may be used shown in Fig. 1
Metal-oxide-semiconductor) Q1 conductings, switching tube Q2 cut-off, White LED is bright.When external switch (not shown in figure 1) switches, circuit detects out
Switching signal is closed, DRV_W is low level, and DWR_Y is high level, switching tube Q1 cut-offs, switching tube Q2 conductings, yellow led (Fig. 1
Middle YLED- indicates yellow led) it is bright.Certainly, which is readily applicable in the LED product of switching brightness.
In the prior art, the output electrolyte capacity of LED drive circuit is larger, and especially single- stage PFC drives, and output is usual
Larger electrolytic capacitor is needed to carry out the working frequency ripple wave of smooth output current.As a result, when using switching LED colour temperatures, it can deposit
The problem of LED light flickers.Specifically, assuming currently bright for White LED, Q1 conductings, Q2 cut-offs.Switch disconnects, and Q1 and Q2 are equal
Cut-off；Switch is closed, Q1 cut-offs, Q2 conductings.In switch-off instant, since Q1 and Q2 are turned off, output electrolyte capacity is larger,
Electrolytic capacitor is exported without low-impedance repid discharge circuit, can only be discharged by output load resistance R1, resistance R1 is usual
Resistance value is larger (resistance value be tens K ohm or more), and discharge time is very long, if switch rapid closing, Q1 cut-offs, Q2 is connected,
When driving does not have started work, exporting energy remaining on electrolytic capacitor can be discharged by yellow led, to can visually go out
When now switch is switched fast the case where yellow led flicker.Similarly, in the LED product of switching LED luminance, also will appear
When switch is switched fast, visually there is the case where LED flickers.
Utility model content
In view of the above problems, it is proposed that the utility model overcoming the above problem in order to provide one kind or solves at least partly
The certainly combinational circuit and control circuit of the above problem.
According to the one side of the utility model, a kind of combinational circuit is provided, is applied to LED drive circuit, including：Detection
Module and driving connected to it and logical transition module, wherein
Detection module detects external switch state, generates detection signal according to the external switch state detected, will detect
Signal is sent to driving and logical transition module；
Driving and logical transition module receive the detection signal for carrying out self-detection module, and generate driving according to detection signal
Signal, the discharge module for being used to discharge to the output electrolytic capacitor of LED drive circuit using the state-driven of drive signal
Working condition.
Optionally, if external switch state is to disconnect, detection module is according to the detection signal that external switch state generates
Low level, driving and logical transition module are high level signal according to the drive signal that low level detection signal generates, and are driven
Dynamic discharge module work, to be discharged the output electrolytic capacitor of LED drive circuit by discharge module；
If external switch state is to be closed, detection module is high level according to the detection signal that external switch state generates,
Driving and logical transition module are low level signal, discharge module not work according to the drive signal that the detection signal of high level generates
Make.
Optionally, detection module includes the auxiliary winding of first resistor, capacitor element, diode and power inductance, the
One resistance is in parallel with capacitor element, in parallel with capacitor element after the auxiliary winding serial of diode and power inductance；
If external switch state is to be closed, the voltage of the auxiliary winding of power inductance is dither ac square wave, and work(
After voltage in the auxiliary winding of rate inductance carries out rectifying and wave-filtering via diode and capacitor element, the detection letter of high level is generated
Number；If external switch state is to disconnect, the diode cut-off, and generate low level detection signal.
Optionally, driving and logical transition module include zener diode and metal-oxide-semiconductor, wherein zener diode one end connects
Capacitor element is connect, the other end connects the grid of metal-oxide-semiconductor；
If the detection signal that detection module generates is low level, zener diode cut-off, metal-oxide-semiconductor cut-off, and generate high electricity
Flat drive signal gives the discharge module, output electrolytic capacitor to discharge through discharge module；
If the detection signal that detection module generates is high level, zener diode conducting breakdown, and MOS pipes is driven to be connected,
And low level drive signal is generated to the discharge module, discharge module does not work.
On the other hand according to the utility model, a kind of control circuit is additionally provided, is applied to LED drive circuit, including cut
Change the combinational circuit of switch module, discharge module and any embodiment above, wherein
Switch switch module, connect at least two-way light source, receives the switching signal from external switch, and according to
At least colour temperature of two-way light source and/or brightness are switched over according to switching signal；
Driving and logical transition module in discharge module, with switching switch module and combinational circuit are separately connected, and are received
The drive signal of driving and the output of logical transition module, to utilize the state-driven oneself state of drive signal, and in itself shape
It discharges the output electrolytic capacitor of LED drive circuit when state is in working condition, so that switching switch module is in switching at least two-way
After the colour temperature of light source and/or brightness, output electrolytic capacitor is not discharged by current illuminating source.
Optionally, control circuit is utilizing switching light source color temperature and/or bright for controlling or eliminating LED drive circuit
Light source flickers when spending.
Optionally, the condition of external switch generation switching signal includes：If external switch is in closed state, then
External switch disconnection generates switching signal when reclosing.
Optionally, discharge module includes second resistance and triode, the collector of second resistance one end connecting triode, separately
One end of one end connection output electrolytic capacitor, exports the emitter of the other end connecting triode of electrolytic capacitor；
If external switch state is to disconnect, the detection signal that the detection module foundation on off state of combinational circuit generates is low
Level, driving and logical transition module are high level signal according to the drive signal that low level detection signal generates, and are driven
Triode ON, output electrolytic capacitor are discharged by second resistance and triode.
Optionally, the light source of at least two colors is at least included in two-way light source, and different per the color of road light source.
Optionally, at least the roads two-way light source Zhong Ge quantity of light source is different.
Optionally, at least two-way light source includes the light sources of at least two colors, and color, the quantity per road light source are different.
Optionally, control circuit further includes：
Linear stable is connect with the detection module of combinational circuit, receives the detection signal of detection module, and according to detection
Signal provides burning voltage for the driving and logical transition module.
Combinational circuit in the utility model embodiment is applied in LED drive circuit, and combinational circuit includes detection module
With driving connected to it and logical transition module.Wherein, detection module detects external switch state, according to the outside detected
On off state generates detection signal, and detection signal is sent to driving and logical transition module.Driving and logical transition module connect
The detection signal for carrying out self-detection module is received, and drive signal is generated according to detection signal, is used using the state-driven of drive signal
In the working condition for the discharge module that the output electrolytic capacitor to LED drive circuit discharges.The utility model is implemented as a result,
Example in LED driving circuits by being arranged detection module and driving and logical transition module, to be cooperated jointly using the two modules
The working condition for driving discharge module, to be discharged the output electrolytic capacitor of LED drive circuit by discharge module, to not
LED light source can be made to generate flicker when luminous due to the residual amount of energy on output electrolytic capacitor.Such as utilizing switching light
LED light source is not in vision stroboscopic during source colour temperature and/or brightness, improves the usage experience of user.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model
It can be clearer and more comprehensible with advantage, it is special below to lift specific embodiment of the present utility model.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Add the above-mentioned and other purposes, advantages and features of clear the utility model.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to this practicality
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 shows the partial circuit schematic diagram of LED drive circuit in the prior art；
Fig. 2 shows the partial circuit schematic diagrames according to the control circuit of the utility model one embodiment.
Specific implementation mode
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
The utility model embodiment provides a kind of combinational circuit, which is applied to LED drive circuit, referring to figure
2, using floating ground High Power Factor BUCK circuits, (i.e. buck becomes the topological structure of the utility model embodiment LED drive circuit
Change circuit), the application process of the combinational circuit of the utility model is introduced.Combinational circuit include detection module 10 and with
Its driving connected and logical transition module 20.Wherein, shape (is not shown) for detecting external switch in detection module 10 in Fig. 2
State, and detection signal is generated according to the external switch state detected, and then detection signal is sent to driving and logical transition
Module 20.Driving and logical transition module 20 receive the detection signal for carrying out self-detection module 10, and are generated and driven according to detection signal
Dynamic signal, to be used to discharge to the output electrolytic capacitor EC1 of LED drive circuit using the state-driven of drive signal
The working condition of discharge module 30.
In this embodiment, there is output electrolytic capacitor EC1, when discharge module 30 is in work shape in LED drive circuit
It, can be to output electrolytic capacitor EC1 electric discharges when state.Below to by detection module 10 and driving and logical transition module 20 to electric discharge
The driving process of the working condition of module 30 is introduced.Specifically, when external switch state is off-state, detection module
The 10 detection signals generated according to external switch state are low level, and driving and logical transition module 20 are according to low level detection
The drive signal that signal generates is high level signal, and discharge module 30 is driven to work, to which discharge module 30 drives electricity to LED
The output electrolytic capacitor EC1 on road discharges.When external switch state is closed state, detection module 10 is opened according to outside
The detection signal that off status generates is the drive that high level, driving and logical transition module 20 are generated according to the detection signal of high level
Dynamic signal is low level signal, and discharge module 30 does not work at this time, i.e., discharge module 30 will not carry out output electrolytic capacitor EC1
Electric discharge.
The utility model embodiment can be adapted for LED drive circuit and utilize switching light source color temperature and/or brightness
There is the operative scenario flickered in Shi Guangyuan, to eliminate or control the flicker of light source.When using external switch to the colour temperature of light source and/
Or brightness is cooperated to drive discharge module 30 by detection module 10 and driving and logical transition module 20 when switching over
To the energy release on output electrolytic capacitor EC1, make light source so as to avoid due to the residual amount of energy on output electrolytic capacitor EC1
Flicker is led to the problem of when luminous.To be not in vision during using switching light source color temperature and/or brightness
Stroboscopic improves the usage experience of user.Since the LED product in current High Power Factor passes through switching light source color temperature
And/or when brightness, it is be easy to cause the flicker of light source, therefore, the utility model can be very good to be useful in power factor>
In 0.7 high-capacity LED product.
With continued reference to Fig. 2, in one embodiment of the utility model, detection module 10 includes first resistor, capacitor element, two
The auxiliary winding of pole pipe and power inductance, first resistor is in parallel with capacitor element, the auxiliary winding of diode and power inductance
It is in parallel with capacitor element after series connection.In Fig. 2, first resistor is resistance R6, and capacitor element is capacitance C1, diode D1, work(
Rate inductance is L2, auxiliary winding, that is, pin 6 and 8 of power inductance L2.
If external switch state is to be closed, the voltage of the auxiliary winding of power inductance L2 is dither ac square wave, and
After voltage in the auxiliary winding of power inductance L2 carries out rectifying and wave-filtering via diode D1 and capacitance C1, the inspection of high level is generated
Survey signal.If external switch state is to disconnect, diode D1 cut-offs, and generate low level detection signal.
In this embodiment, driving and logical transition module 20 include zener diode ZD1, resistance R7, R8, R10, R11
And switching tube (such as metal-oxide-semiconductor shown in Fig. 2) Q3.Wherein, the one end zener diode ZD1 connects capacitance C1, and the other end connects
Connect the grid of metal-oxide-semiconductor Q3.When the detection signal that detection module 10 generates is low level, zener diode ZD1 ends, and drives
Metal-oxide-semiconductor Q3 cut-offs, output electrolytic capacitor EC1 discharge through discharge module 30.If the detection signal that detection module 10 generates is high electricity
It is flat, zener diode ZD1 conducting breakdown, and metal-oxide-semiconductor Q3 is driven to be connected, discharge module 30 does not work.
Conceived based on same utility model, the utility model additionally provides a kind of control circuit, is applied to LED driving electricity
Road, with continued reference to Fig. 2, control circuit includes the group in discharge module 30, switching switch module 40 and any embodiment above
Close circuit (including detection module 10 and driving and logical transition module 20 in the combinational circuit).Wherein, switch switch module
40 connect at least two-way light source, receive the switching signal from external switch, and according to switching signal to extremely
The colour temperature of few two-way light source and/or brightness switch over.Wherein, at least load of the two-way light source as LED drive circuit, the reality
It applies and is illustrated two-way light source, indicate that White LED, another way indicate yellow led with YLED- with WLED- all the way.The embodiment
In, if the condition that external switch generates switching signal can be that external switch is in closed state, then external switch is disconnected
Open generation switching signal when reclosing.The utility model embodiment is not specifically limited the branch quantity of light source.
Discharge module 30 is separately connected with switching switch module 40 and driving and logical transition module 20, is received driving and is patrolled
The drive signal that conversion module 20 exports is collected, to be work using the state-driven oneself state of drive signal, and in oneself state
It discharges the output electrolytic capacitor of LED drive circuit when making state, so that switching switch module 40 is in switching at least two-way light source
Colour temperature and/or brightness after, output electrolytic capacitor EC1 do not discharged by current illuminating source.
In this embodiment, control circuit can be applied to LED drive circuit using switching light source color temperature and/or
There is the operative scenario flickered in light source when brightness.Wherein, colour temperature switching refers to the switching to different colored light sources, if this practicality
Novel control circuit application scenarios are the scene of toggle lights colour temperature, include at this time at least two colors at least in two-way light source
Light source, and the color per road light source is different.For example, light source is white all the way, another way light source is yellow, then control circuit
Colour temperature switching can be carried out between white and yellow, can also include the light source of other colors certainly, and the utility model is implemented
Example is not specifically limited this.The control circuit of embodiment illustrated in fig. 2 is the scene applied to switching colour temperature.
Brightness switching refers to the switching to different brightness light sources, if the control circuit application scenarios of the utility model are to cut
The scene of light-source brightness is changed, the quantity of at least roads two-way light source Zhong Ge light source is different at this time.For example, quantity of light source is 3 all the way
A, it is 5 that another way light source, which has the quantity of light source of same model, then control circuit can be between 3 light sources and 5 light sources
Carry out the switching of brightness.It is, of course, also possible to realize cutting for brightness by the light source that different model is arranged at least two-way light source
It changes, for example, three road light sources, quantity of light source is identical, and light source is 3W all the way, and another two-way light source is respectively 5W and 8W, also may be used in this way
To realize the brightness switching of LED.
It is, of course, also possible to the switching of colour temperature and brightness is carried out at the same time, at this point, at least two-way light source includes at least two colors
Light source, color, the quantity per road light source is different.
In one embodiment of the utility model, discharge module 30 is believed according to the driving that driving and logical transition module 20 export
The process of itself working condition number is driven to may include：If drive signal is low level, discharge module 30 is according to low level drive
It is not work that dynamic signal, which drives itself working condition,.If drive signal is high level, driving of the discharge module 30 according to high level
It is work that signal, which drives itself working condition,.
In this embodiment, discharge module 30 includes second resistance and triode, second resistance one end connecting triode
Collector, one end of other end connection output electrolytic capacitor EC1.Export the hair of the other end connecting triode of electrolytic capacitor EC1
Emitter-base bandgap grading.In fig. 2, second resistance is resistance R9, and triode is triode Q4.If external switch state is to disconnect, detection module
The 10 detection signals generated according on off state are low level, zener diode ZD1 cut-offs, the Q3 cut-offs of driving metal-oxide-semiconductor, metal-oxide-semiconductor
The driving of Q4 is got higher, i.e. triode Q4 conductings, and output electrolytic capacitor EC1 passes through resistance R9 and triode Q4 electric discharges.
In order to more clearly embody the utility model embodiment, now switching switch module 40 is switched with an embodiment
LED modules with different colors shines and the course of work of discharge module 30 is introduced during this period.
Referring to Fig. 2, in this embodiment, when (WLED- and YLED- i.e. shown in Fig. 2, WLED- indicate one to light source led
Road White LED, YLED- indicate yellow led all the way) normal work, at this point, DRV_SW (DRV, that is, driver, drive signal) is
Low level, the triode Q4 cut-offs of discharge module 30, Q1 conductings, Q2 cut-offs, White LED are bright.
When DRV_SW is high level, triode Q4 conductings, Q1 and Q2 are turned off.Due to the concatenated resistance R9 of triode Q4
Resistance value it is minimum.Therefore, the energy on output electrolytic capacitor EC1 can be rapid by the resistance R9 and triode Q4 of discharge module 30
It discharges.Wherein, the resistance value of resistance R9 can be determined according to actual circuit and output electrolysis capacitance, under normal circumstances, electricity
The resistance value of resistance R9 can be selected between 100-1K ohm, and the utility model embodiment does not do specifically the resistance value of R9
It limits.
When DRV_SW reaches low level, triode Q4 cut-offs again, Q1 ends, Q2 conductings, and yellow led is bright.Due to electrolysis electricity
The energy held on EC1 has been discharged by resistance R9 and triode Q4 after last time switch disconnection.Therefore, in switching switching molding
Before block 40 is started to work, the flicker of LED can't be caused by exporting the residual amount of energy on electrolytic capacitor EC1.When switching switch module
After 40 start to work, switching switch module 40 can normally complete the handoff functionality of LED colour temperatures.To in switching LED colors
It is not in the stroboscopic of vision during temperature.
Similarly, in the scene using switching light-source brightness, switching can equally be eliminated using aforesaid way
The vision stroboscopic of process.At this point, at least in two-way light source, the LED of different number is included per road light source, by different number
Switching is carried out in the branch of LED, so as to realize the switching of light-source brightness.
Also, in using switch toggle lights brightness and colour temperature lighting apparatus simultaneously, it can also be disappeared using aforesaid way
Except the vision stroboscopic of switching process.At this point, at least in two-way light source, the LED of different number is included per road light source, and per road
In include LED color it is also different, by carrying out switching in the branch of different number and the LED of different colours, to
The switching of light-source brightness and colour temperature may be implemented.
In another embodiment of the utility model, control circuit further includes linear stable 50, linear stable 50 and inspection
It surveys module 10 to connect, receives the detection signal of detection module 10, and be that driving and logical transition module 20 carry according to detection signal
For burning voltage.
The control circuit of the utility model embodiment can be applied in the topological structure of any LED drive circuit, Fig. 2
Shown in embodiment, the buck circuits that topological structure uses include capacitance C3, switching tube (i.e. metal-oxide-semiconductor) Q6, L2 main winding
(i.e. pin 2 and 4), sustained diode 2 and output electrolytic capacitor EC1.The grid connection driving IC of wherein metal-oxide-semiconductor Q6
(integrated circuit, integrated circuit), driving IC (not shown)s are the control IC of LED drive circuit, here
It is called IC1.In addition, can also include special colour temperature/brightness switching control IC or microcontroller in control circuit, this
In be called IC2 (not shown)s, IC2 and its perimeter circuit can synchronize detection switch switching state, and IC2 also has
The detection circuit of its own (detection circuit herein is different from detection module 10 presented hereinabove).When IC2 receives outside
When the switch control signal of switch, switching signal, i.e. DRV_W in Fig. 2 and DRV_Y can be generated, in WLED- and
It is switched between YLED-.
The complete operation of the control circuit of the utility model embodiment is specifically introduced below.
External switch is closed, LED drive circuit normal work, and the main winding of power inductance L2 (draws in detection module 10
Foot 2 and 4) on voltage be dither ac square wave, the auxiliary winding (i.e. pin 6 and 8) of power inductance L2 is by magnetic coupling
Voltage afterwards is also dither ac square wave.Voltage in power inductance L2 auxiliary windings passes through two poles of detection module 10
After pipe D1 and capacitance C1 rectifying and wave-filterings, Vcc_aux is high level.In the utility model embodiment, the high level of Vcc_aux
Voltage value is about 12V.Certainly, the high level voltage value of Vcc_aux can also use other voltage values, the utility model embodiment
This is not specifically limited.The high level of Vcc_aux provides the output of 5V constant pressures by linear stable 50.
At this point, Vcc_aux is high level so that the zener diode ZD1 conductings in driving and logical transition module 20 are hit
It wears, driving metal-oxide-semiconductor Q3 conductings, the driving of the triode Q4 of discharge module 30 is lower, triode Q4 cut-offs.The three of discharge module 30
Pole pipe Q4 and resistance R9 do not work, that is, discharge module 30 is not involved in work.
External switch disconnects, and LED drive circuit is stopped, on the main winding (i.e. pin 2 and 4) of power inductance L2
Voltage is zero, and the voltage of auxiliary winding (i.e. pin 6 and 8) after magnetic coupling of power inductance L2 is also zero.Due to capacitance C1
Capacitance it is smaller, therefore, Vcc_aux rapidly goes to low level (i.e. Vcc_aux voltages are zero).Due to linear stable 50
There is output end larger electrolytic capacitor EC2 therefore still to maintain 5V constant in the short time after down circuitry.
At this point, Vcc_aux is low level so that zener diode ZD1 cut-offs, metal-oxide-semiconductor Q3 cut-offs, the driving of triode Q4
It gets higher, triode Q4 conductings.Triode Q4 and resistance R9 work, that is, discharge module 30 works.It exports on electrolytic capacitor EC1
Energy can be discharged rapidly by resistance R9 and triode Q4, at this point, the voltage on output electrolytic capacitor EC1 is approximately zero.
External switch is closed again, and Vcc_aux rapidly goes to high level, metal-oxide-semiconductor Q3 conductings, triode Q4 cut-offs.Electrolysis
Capacitance EC1 can be gradually increasing with the operating voltage of switching switch module 40 until the LED of work at present is lighted completely.
So far, entire circuit completes the colour temperature handoff functionality of LED illumination device, also, LED illumination device is in switching
It is not in the stroboscopic of vision during colour temperature.Similarly, when using switching light-source brightness, or switch is being utilized simultaneously
Aforesaid way is equally applicable when toggle lights brightness and colour temperature.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the utility model
Embodiment can be put into practice without these specific details.In some instances, be not been shown in detail well known method,
Structure and technology, so as not to obscure the understanding of this description.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more in each utility model aspect
It is a, above in the description of the exemplary embodiment of the utility model, each feature of the utility model is divided together sometimes
In group to single embodiment, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following meaning
Figure：The requires of the utility model features more more than the feature being expressly recited in each claim i.e. claimed.
More precisely, being as reflected in the following claims, in terms of utility model single less than disclosed above
All features of embodiment.Therefore, it then follows thus claims of specific implementation mode are expressly incorporated in the specific embodiment party
Formula, wherein separate embodiments of each claim as the utility model itself.
So far, although those skilled in the art will appreciate that the more of the utility model have been shown and described in detail herein
A exemplary embodiment still, still can be according to the utility model public affairs in the case where not departing from the spirit and scope of the utility model
The content opened directly determines or derives many other variations or modifications for meeting the utility model principle.Therefore, this practicality is new
The range of type is understood that and regards as to cover other all these variations or modifications.
Claims (12)
1. a kind of combinational circuit is applied to LED drive circuit, including：Detection module and driving connected to it and logical transition
Module, wherein
Detection module detects external switch state, generates detection signal according to the external switch state detected, will detect signal
It is sent to driving and logical transition module；
Driving and logical transition module receive the detection signal for carrying out self-detection module, and generate drive signal according to detection signal,
Utilize the work for the discharge module that the state-driven of drive signal is used to discharge to the output electrolytic capacitor of LED drive circuit
State.
2. combinational circuit according to claim 1, which is characterized in that
If external switch state is to disconnect, the detection module is low level according to the detection signal that external switch state generates,
The drive signal that the driving and logical transition module are generated according to low level detection signal is high level signal, and drives institute
Discharge module work is stated, to be discharged the output electrolytic capacitor of LED drive circuit by discharge module；
If external switch state is to be closed, the detection module is high level according to the detection signal that external switch state generates,
The drive signal that the driving and logical transition module are generated according to the detection signal of high level is low level signal, discharge module
It does not work.
3. combinational circuit according to claim 2, which is characterized in that
The detection module includes the auxiliary winding of first resistor, capacitor element, diode and power inductance, first electricity
Resistance is in parallel with capacitor element, in parallel with capacitor element after the auxiliary winding serial of the diode and the power inductance；
If external switch state is to be closed, the voltage of the auxiliary winding of the power inductance is dither ac square wave, and institute
After the voltage in the auxiliary winding of power inductance is stated via the diode and capacitor element progress rectifying and wave-filtering, generate high
The detection signal of level；If external switch state is to disconnect, the diode cut-off, and generate low level detection signal.
4. combinational circuit according to claim 3, which is characterized in that it is described driving and logical transition module include voltage stabilizing two
Pole pipe and metal-oxide-semiconductor, wherein described zener diode one end connects capacitor element, and the other end connects the grid of metal-oxide-semiconductor；
If the detection signal that the detection module generates is low level, zener diode cut-off, metal-oxide-semiconductor cut-off, and generate high electricity
Flat drive signal gives the discharge module, output electrolytic capacitor to discharge through the discharge module；
If the detection signal that the detection module generates is high level, zener diode conducting breakdown, driving metal-oxide-semiconductor conducting, and
Low level drive signal is generated to the discharge module, the discharge module does not work.
5. a kind of control circuit is applied to LED drive circuit, including switching switch module, discharge module and claim 1-4
The combinational circuit of any one, wherein
Switch switch module, connect at least two-way light source, receives the switching signal from external switch, and foundation is opened
Switching signal is closed to switch over at least colour temperature of two-way light source and/or brightness；
Driving and logical transition module in discharge module, with the switching switch module and combinational circuit are separately connected, and are received
The drive signal of the driving and the output of logical transition module, to utilize the state-driven oneself state of drive signal, and certainly
It discharges the output electrolytic capacitor of LED drive circuit when body state is in working condition, so that the switching switch module is switching
At least after the colour temperature of two-way light source and/or brightness, the output electrolytic capacitor is not discharged by current illuminating source.
6. control circuit according to claim 5, which is characterized in that control circuit is for controlling or eliminating LED driving electricity
Road light source when using switching light source color temperature and/or brightness flickers.
7. control circuit according to claim 5 or 6, which is characterized in that the external switch generates switching signal
Condition include：If external switch is in closed state, then external switch disconnection generates switching signal when reclosing.
8. control circuit according to claim 5 or 6, which is characterized in that
The discharge module includes second resistance and triode, and the collector of described second resistance one end connecting triode is another
One end of the end connection output electrolytic capacitor, the other end for exporting electrolytic capacitor connect the emitter of the triode；
If external switch state is to disconnect, the detection signal that the detection module foundation on off state of the combinational circuit generates is low
Level, the driving and logical transition module are high level signal according to the drive signal that low level detection signal generates, and
The triode ON, the output electrolytic capacitor is driven to discharge by the second resistance and the triode.
9. control circuit according to claim 5 or 6, which is characterized in that include at least two in at least two-way light source
The light source of kind color, and it is different per the color of road light source.
10. control circuit according to claim 5 or 6, which is characterized in that the roads at least two-way light source Zhong Ge light source
Quantity is different.
11. control circuit according to claim 5 or 6, which is characterized in that at least two-way light source includes at least two
The light source of color, color, the quantity per road light source are different.
12. control circuit according to claim 5 or 6, which is characterized in that further include：
Linear stable is connect with the detection module of the combinational circuit, receives the detection signal of the detection module, and foundation
The detection signal provides burning voltage for the driving and logical transition module.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721671367.1U CN207766600U (en) | 2017-12-05 | 2017-12-05 | A kind of combinational circuit and control circuit |
| PCT/CN2018/119011 WO2019109894A1 (en) | 2017-12-05 | 2018-12-03 | Combined circuit and control circuit |
| US16/893,005 US11523481B2 (en) | 2017-12-05 | 2020-06-04 | Combinational circuit and control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721671367.1U CN207766600U (en) | 2017-12-05 | 2017-12-05 | A kind of combinational circuit and control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207766600U true CN207766600U (en) | 2018-08-24 |
Family
ID=63189916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721671367.1U Withdrawn - After Issue CN207766600U (en) | 2017-12-05 | 2017-12-05 | A kind of combinational circuit and control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207766600U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995732A (en) * | 2017-12-05 | 2018-05-04 | 欧普照明股份有限公司 | A kind of combinational circuit and control circuit |
| WO2019109894A1 (en) * | 2017-12-05 | 2019-06-13 | 苏州欧普照明有限公司 | Combined circuit and control circuit |
-
2017
- 2017-12-05 CN CN201721671367.1U patent/CN207766600U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995732A (en) * | 2017-12-05 | 2018-05-04 | 欧普照明股份有限公司 | A kind of combinational circuit and control circuit |
| WO2019109894A1 (en) * | 2017-12-05 | 2019-06-13 | 苏州欧普照明有限公司 | Combined circuit and control circuit |
| CN107995732B (en) * | 2017-12-05 | 2020-03-31 | 欧普照明股份有限公司 | Combined circuit and control circuit |
| US11523481B2 (en) | 2017-12-05 | 2022-12-06 | Oppie Lighting Co., Ltd. | Combinational circuit and control circuit |
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