CN105934040B - A kind of light adjusting circuit - Google Patents
A kind of light adjusting circuit Download PDFInfo
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- CN105934040B CN105934040B CN201610428659.6A CN201610428659A CN105934040B CN 105934040 B CN105934040 B CN 105934040B CN 201610428659 A CN201610428659 A CN 201610428659A CN 105934040 B CN105934040 B CN 105934040B
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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]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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Abstract
The invention discloses a kind of light adjusting circuits, including rectification circuit, LED light string, current detection module, judgment module, handover module, drive module, sample circuit, at least one power tube and power supply module, the input terminal of power tube connects the cathode of external LED light string, the output terminal connection current detection module and sample circuit of power tube.The duration that the present invention has no current to flow through by detecting power tube source electrode, so as to avoid influence of the capacitance to switch detection accuracy in circuit.It is inconsistent so as to cause switch on and off erroneous judgement problem to avoid the discharge time caused by applications component variations.Chip interior clock timer controls preset time, and light modulation consistency is high, avoids erroneous judgement of the switch interference to detection, ensures that switch dimming method can be used in large area region.
Description
Technical field
The present invention relates to LED illumination control technology field more particularly to a kind of LED switch light adjusting circuits.
Background technology
There are many forms for LED light adjusting circuits currently on the market, are mainly adjusted including controllable silicon light modulation, PWM light modulations and switch
Light etc..Most of switch dimming is all to act to be dimmed by detecting the on-off of power switch, which is based on
Threshold value comparison, operation principle are：Using power positive end connection resistance and capacitance to, the variation of voltage on sampling capacitance,
It is judged as that switch is closed when the voltage on capacitance is higher than first threshold, is switch when the voltage on capacitance is less than second threshold
It opens, judges the on-off actions of power switch, and on-off actions are counted, maintain to count knot after power supply power-fail
Fruit corresponds to reference voltage to control the size of current for flowing through LED, so as to fulfill light modulation according to power-off number output one.This tune
There are the following problems for light method：
One side is because the fall time of capacitance voltage is influenced very greatly, such as the actual capacity of capacitance by capacitance parameter, capacitance
Leakage current, the temperature characterisitic of capacitance, different manufacturers capacitance these parameters can not unify, the electricity of even same producer
Hold, these parameters are there is also deviation, so as to seriously affect the accuracy of switch detection；On the other hand, it is opened in high-speed switch power supply
Guan Shihui causes light modulation detection inaccurate, and leak detection or few detection switch action, result is exactly to control multiple lamps in a switch
When, high-speed switch power supply, there is inconsistent phenomenon in dimming state between lamp and lamp, causes switch dimming can not be in market supermarket etc.
Commercial large area region uses.
It would therefore be highly desirable to fundamentally solve the problems, such as that switch dimming exists.
Invention content
To solve problems of the prior art, the present invention proposes a kind of light adjusting circuit, including rectification circuit, LED light
String, current detection module, judgment module, handover module, drive module, sample circuit, at least one power tube and power supply module；
The input terminal of at least one power tube connects the cathode of external LED light string；
The output terminal connection current detection module and sample circuit of at least one power tube；
The current detection module is operatively coupled with the judgment module and connect；
The judgment module is operatively coupled with the handover module and connect；
The handover module is operatively coupled with the drive module and connect；
The drive module connects the control terminal of the power tube；
The current detection module is used to detect whether the power tube has electric current to flow through, and export detection signal；
The judgment module determines the break-make duration of electric current on the power tube according to the detection signal and exports
Judge signal；
The handover module controls the drive module to export different driving signal according to the judgement signal；
The power tube is according to the drive signal switched conductive state.
Preferably, the current detection module includes at least one comparator circuit, when there is electric current to flow through power tube, than
It is height compared with device output, when no electric current flows through power tube, comparator output is low, and the signal of the current detection module output is
Detect signal.
Preferably, output voltage and reference voltage of the input of the comparator for power tube, different power tubes difference
Different comparator circuits is connected, the reference voltage of different comparators input is identical or different.
Preferably, the judgment module includes logic judging circuit, trigger circuit；The logic judging circuit and the electricity
The output terminal of comparator is connected in stream detection module, and the logic judging circuit is used for what is exported according to the current detection module
Detection signal judges the current signal break-make duration on the power tube, meets default item when the current signal break-make duration
Logic judging circuit output judges signal to trigger circuit, the trigger circuit output trigger signal to handover module during part.
Preferably, the preset condition includes：The current signal on-time, which is more than first threshold and disconnects, to be continued
Time is more than second threshold and is more than third threshold value less than third threshold value or break time.
Preferably, the handover module includes state storage circuitry and gate control circuit, and the storage circuit connects institute
State gate control circuit；The storage circuit include counter, for storage switch effective on off state and to effectively switching
State counts；The gate control circuit exports gate control signal, the different numerical value according to the numerical value of the counter
The corresponding different gate control signal, the different gate control signals correspond to different gating control voltage.
Preferably, the drive module includes at least one double-width grinding comparison circuit, the double-width grinding comparison circuit
Input terminal connection power tube output voltage, another input terminal connects the choosing of gate control circuit output
Logical control voltage (Vp), the output terminal of the double-width grinding comparison circuit connect the control terminal of the power tube, different both-ends
The output terminal for inputting comparison circuit connects different power tube control terminals.
Preferably, excess temperature compensation circuit is further included, the excess temperature compensation circuit is connected with the handover module, works as chip
When temperature is more than set temperature, the excess temperature compensation circuit output excess temperature control signal, the handover module is according to the excess temperature
Signal is controlled to control the output voltage of the drive module, so as to control the size of current of the power tube output terminal.
Preferably, the sample circuit includes sampling resistor, and described sampling resistor one end connects the output of the power tube
End and the current detection module, the other end connect the cathode of external rectification circuit.
The present invention also proposes a kind of LED illumination circuit, and including aforementioned light adjusting circuit, the LED illumination circuit further includes
Power switch, the power switch connects rectification circuit, for control circuit break-make, the anode connection LED of the rectification circuit
The power supply module of the anode of lamp string, the light adjusting circuit, the sample circuit of the cathode connection light adjusting circuit of the rectification circuit.
The beneficial effect of the present invention compared with the prior art is：
(1) the circuit detection switch break-make is realized by detecting power tube source current situation of change, can effectively be kept away
Exempt from the influence of capacitance in traditional switch monitoring method.
(2) present invention is acted by the " closed ", "off", Reset of this kind of method detection switch, is avoided because of outside
Discharge time caused by application device difference is inconsistent so as to cause switch on and off erroneous judgement problem.
(3) preset time condition of the present invention is controlled by circuit Internal clock timer, by peripheral components parameter influenced compared with
Small, light modulation consistency is high.
(4) the reasonable setting of high current duration and no current duration of the present invention can be to avoid switch interference to inspection
The erroneous judgement of survey.
(5) present invention can be to avoid the commercial large area region such as market, supermarket in use, lamp caused by switch dimming and lamp
Between dimming state there is inconsistent phenomenon.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments；
Fig. 1 is single channel light adjusting circuit structure diagram according to embodiments of the present invention；
Fig. 2 is Double-way light regulating electrical block diagram according to embodiments of the present invention；
Fig. 3 is current detection module structure diagram according to embodiments of the present invention；
Fig. 4 is judgment module structure diagram according to embodiments of the present invention；
Fig. 5 is handover module structure diagram according to embodiments of the present invention；
Fig. 6 is drive module structure diagram according to embodiments of the present invention；
Fig. 7 is power supply module structure diagram according to embodiments of the present invention；
Fig. 8 is switch motion sequence diagram according to embodiments of the present invention；
Fig. 9 is switch motion sequence diagram according to embodiments of the present invention；
Figure 10 is switch motion sequence diagram according to embodiments of the present invention；
Figure 11 is control flow chart according to embodiments of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is further explained.It should be understood that these embodiments are merely to illustrate the present invention and do not have to
In limiting the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art can be with
The present invention is made various changes or modifications, such equivalent forms equally fall within the model that the application the appended claims are limited
It encloses.
As shown in Figure of description 1, wherein comprising a LED light string, light adjusting circuit includes current detection module 10, judges
Module 20, handover module 30, drive module 40, sample circuit 60, LED light string, power tube 70, power supply module 80；It is at least one
The input terminal of power tube connects the cathode of the LED light string；The output terminal connection current detection module 10 of power tube 70 and sampling
Circuit 60；Current detection module 10 is operatively coupled with the judgment module 20 and connect；Judgment module 20 and handover module 30
It is operatively coupled connection；Handover module 30 is operatively coupled with drive module 40 and connect；Drive module 40 connects at least one
The control terminal of a power tube；Current detection module 10 is used to detect whether power tube has electric current to flow through；Judgment module 20 is according to work(
The break-make duration output of electric current judges signal on rate pipe；Handover module 30 according to judge signal control drive module 40 export
Different driving signal；Power tube 70 is according to the drive signal switched conductive state.Power supply module 80 provides power supply for circuit, electricity
Flow output voltage Vi1 and reference voltage V1 of the input of comparator in detection module 10 for power tube 70.Sample circuit 60 includes
Sampling resistor R2, sampling resistor one end connection output terminal of power tube 70 and current detection module 10, other end connection rectified current
The cathode on road.
As shown in Figure of description 2, wherein comprising two LED light strings, light adjusting circuit includes current detection module 10, judges
Module 20, handover module 30, drive module 40, sample circuit 60, LED light string, power tube 701,702, power supply module 80；At least
The input terminal of one power tube connects the cathode of the LED light string；The output terminal connection current detection module of power tube 701,702
10 and sample circuit 60；Current detection module 10 is operatively coupled with the judgment module 20 and connect；Judgment module 20 is with cutting
Mold changing block 30 is operatively coupled connection；Handover module 30 is operatively coupled with drive module 40 and connect；Drive module 40 connects
Connect the control terminal of at least one power tube；Current detection module 10 is used to detect whether power tube has electric current to flow through；Judgment module
20 judge signal according to the make-and-break time output of electric current on power tube；Handover module 30 according to judge signal control drive module 40
Export different driving signal；Power tube 701,702 is according to the drive signal switched conductive state.Power supply module 80 is carried for circuit
Power supply source, output voltage Vi1 and reference voltage V1 of the input of first comparator for power tube 701 in current detection module 10,
Output voltage Vi2 and reference voltage V2 of the input of second comparator for power tube 702, reference voltage V1, V2 can be equal,
Can be unequal, first comparator and the second comparator are not drawn into Fig. 2.Sample circuit 60 includes sampling resistor R21, R22, adopts
The output terminal of sample resistance R21 connections power tube 701 and current detection module 10, the other end connect the cathode of rectification circuit；Sampling
The output terminal of resistance R22 connections power tube 702 and current detection module 10, the other end connect the cathode of rectification circuit.
In addition to Fig. 1, single channel illustrated in fig. 2 and two-way LED light string, driving circuit can also drive multiple lamp strings, only need
It accordingly to add current monitoring module, the dual input number of comparators at drive module and accordingly increase sampling module 60
In sampling resistor quantity.
When contactor, which is closed, to be connected, current detection module 10 exports high level, when contactor is opened, electric current inspection
It surveys module 10 and exports low level, so the output of 10 module of current detection module is low and high level.
Judgment module 20 judges current state according to the signal that current detection module 10 exports, in order to prevent it is manually opened and
Interference burr signal causes to judge by accident to condition adjudgement caused by shutdown switch, and ton is closed in the split closing of judgment module 20 and switch is beaten
It opens toff and all does delay process, ton ＞ 1mS are effective status, and toff ＞ 50mS are effective status.One effective ton and
After toff, the trigger of 20 module of judgment module exports a square-wave signal；Handover module 30 is according to the output of judgment module 20
Signal is counted and corresponds to a state, and each state controls the gate control circuit to correspond to one Vp value of output；
The different Vp values control output current Io=Vp/R2 or Io1=Vp1/R21, Io2 that drive module 40 is exported according to handover module 30
=Vp2/R22.
As shown in figure 3, current detection module 10 includes at least one comparator circuit, the input of comparator circuit is power
The output voltage Vi1 and reference voltage V1 of pipe, the input of different comparator circuits is different, when there is electric current to flow through power tube, than
It is height compared with device output, when no electric current flows through power tube, comparator output is low, with the curent change flowed through in power tube,
The low and high level of the output terminal output variation of current detection module 10.
As shown in figure 4, judgment module 20 includes logic judging circuit, trigger circuit；The logic judging circuit with it is described
The output terminal of comparator is connected in current detection module 10, and the logic judging circuit is used to judge the current detection module 10
The current signal break-make duration provided, logic judging circuit is defeated when the current signal break-make duration meeting preset condition
Go out to judge signal to trigger circuit, the trigger circuit output trigger signal to handover module 30.
Logic judging circuit is comprising internal timer, is influenced by peripheral components parameter smaller.Trigger circuit takes SR to touch
Device is sent out, certainly without loss of generality, trigger such as set-reset flip-floop, d type flip flop etc. of other logics can also realize triggering electricity herein
Road function.
The preset condition includes：The current signal duration is more than first threshold Ton and turn-off time is more than second
Threshold value Toff and be more than third threshold value Tclear less than third threshold value Tclear or turn-off time.Certainly, it is provided in this patent
It is a preferred condition, however not excluded that technical staff selects other suitable preset conditions to realize the control to circuit.
As shown in figure 5, handover module 30 includes state storage circuitry and gate control circuit, storage circuit connects the choosing
Logical control circuit；The storage circuit include counter, for storage switch effective on off state and to effective on off state
Numeration；The gate control circuit exports gate control signal according to the value of counter, and different gate control signals corresponds to not
Same gating control voltage, gating control an input terminal of double-width grinding comparator in control source to drive module 40.
As shown in fig. 6, the drive module 40 includes at least one double-width grinding comparison circuit, the double-width grinding compares
The output voltage Vi1 of the input terminal connection power tube 70 of circuit, it is defeated that another input terminal connects the gate control circuit
The control voltage Vp gone out, the control terminal of the output terminal connection power tube of the double-width grinding comparison circuit.Drive module 40 can be with
Circuit control is realized according to the comparison result of Vp and Vi1, in requisition for multiple double-width grinding comparison circuits during multiple power tubes.
As shown in fig. 7, power supply circuit module 80 provides power supply Vdd and Vpp for circuit, wherein Vdd and Vpp are respectively number
Power supply and analog power provide electric energy to module each in circuit.
In addition, further including excess temperature compensation circuit in circuit, the excess temperature compensation circuit is connected with the handover module, when
When chip temperature is more than set temperature, the excess temperature compensation circuit output excess temperature control signal, the handover module is according to
Excess temperature control signal controls the output voltage of the drive module, so as to control the size of current of power tube output terminal.
As seen in figs. 8-10, the method for the circuit detection switch break-make duration is by detecting power tube source current
Situation of change is realized.When switching closure, current sample point electric current (voltage) duration T 1 reaches or surpasses preset condition
(Ton) judge effective, system mode read switch " closed " action；When the switches are opened, the LED lamp bead of power tube drain electrode connection
Upper no electric current, the electric current for flowing through resistance to ground through power tube source electrode at this time is also zero, and current sampling module acquires the signal simultaneously
Judge whether this signal is effective, when current sample point electric current (voltage) is that zero duration T 2 reaches or surpasses preset condition
(Toff) effective, system mode read switch "off" action, when break time T2 reaches or surpasses default item is judged when
To system reset processing during part (Tclear).
It is acted, is avoided because of applications component variations by the " closed " "off" Reset of this kind of method detection switch
Caused by discharge time it is inconsistent so as to cause switch on and off judge by accident problem, preset condition Toff, Ton, Tclear pass through chip
Internal clock timer controls, and is influenced by peripheral components parameter smaller, and light modulation consistency is high, and the reasonable setting of Toff and Ton1 can
To avoid erroneous judgement of the switch interference to detection.
Light adjusting circuit controls as follows, and the rectified filtering of AC power, power switch is arranged on current rectifying front-end, when
When power switch is effectively closed with opening one time in setting time, the dispaly state of LED changes, control method such as Figure 11 institutes
Show comprising following flow：
S1：Power switch is closed, and state memory counter is set to 0, and LED current is original state；
S2：The electric current of current detection module detection stream overpower pipe, has electric current to export high level, no electricity when flowing through power tube
Stream exports low level when flowing through power tube；
S3：Judge high level lasting time；If high level lasting time is less than threshold value Ton, S10 is performed, otherwise into S4；
S4：Judge low duration；If low duration is more than threshold value Tclaer, S11 is performed；If low level
Duration is less than threshold value Toff, performs S12；Otherwise enter S5；
S5：When low duration is more than threshold value Toff and is less than threshold value Tclaer, state memory counter adds 1；
S6：Whether state memory counter count value is equal to setting value；If during equal to setting value, perform S13；Otherwise enter
S7；
S7：During less than setting value, judgment module exports a state control signal；
S8：Handover module corresponds to not according to state control signal, output voltage control signal, different state control signals
Same voltage control signal；
S9：Drive module controls the grid voltage of power tube, so as to control the electricity of power tube according to voltage control signal
Stream flows through the size of current of LED；Into S3；
S10：High level lasting time is less than threshold value Ton, and state memory counter is kept, and LED current is constant；
S11：Low duration is more than threshold value Tclaer, and state memory counter is reset, when next time, switch was closed,
LED current is original state；
S12：Low duration is less than threshold value Toff, and state memory counter is kept, and LED current is constant；
S13：During equal to setting value, state memory counter is reset, and when next time, switch was closed, LED current is original state.
Different state memory counter count values, corresponding different state control signal, so as to the different electricity of corresponding LED
Flow size, state memory counter when being zero corresponding LED current size be original state.
As shown in figure 8, a switch motion sequential flow includes：
1st, chip is loaded into current state (original state) after being switched on, and current detection module detection has electric current.
2nd, power tube source electrode detects that high level lasting time T1 is more than Ton, is calculated as useful signal, reads next state.
3rd, after switch OFF power tube source-end detection less than electric current
4th, power tube source no current duration T 2 judges that cut-off signal is effective more than Toff but after being no more than Tclear,
System cuts next state.
As shown in figure 9, a switch motion sequential flow includes：
1st, chip is loaded into current state (original state) after being switched on, and current detection module detection power tube source electrode has electric current,
Export high level signal；
2nd, judgment module detection power tube source electrode high level lasting time T1 is more than Ton, is calculated as useful signal, is read next
A state.
3rd, current detection module detects power tube source electrode no current after switch OFF.
4th, judgment module detect power tube source no current duration T 2 be no more than Toff after judge cut-off signal without
Effect, system mode are kept.
As shown in Figure 10, a switch motion sequential flow includes：
1st, chip is loaded into current state (original state) after being switched on, and current detection module detection power tube source electrode has electric current,
Export high level signal；
2nd, judgment module detection power tube source electrode high level lasting time T1 is more than Ton, is calculated as useful signal, is read next
A state.
3rd, current detection module detects power tube source electrode no current after switch OFF.
4th, judgment module detects power tube source no current duration T 2 more than judging that cut-off signal has after Tclear
Effect, system are reset, and start original state when switch is closed next time.
The foregoing is merely the preferred embodiments of the present invention, are not intended to limit the invention, all spirit in the present invention
With all any modification, equivalent and improvement made within principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of light adjusting circuit, including rectification circuit, LED light string, current detection module (10), judgment module (20), switching mould
Block (30), drive module (40), sample circuit (60), at least one power tube (70；701,702) and power supply module (80)；
At least one power tube (70；701,702) input terminal connects the cathode of external LED light string；
At least one power tube (70；701,702) output terminal connection current detection module (10) and sample circuit (60)；
The current detection module (10) is operatively coupled with the judgment module (20) to be connect；
The judgment module (20) is operatively coupled with the handover module (30) to be connect；
The handover module (30) is operatively coupled with the drive module (40) to be connect；
The drive module (40) connects the power tube (70；701,702) control terminal；
The current detection module (10) is for detecting the power tube (70；701,702) whether there is electric current to flow through, and export inspection
Survey signal；
The judgment module (20) determines the power tube (70 according to the detection signal；701,702) break-make of electric current is held on
The continuous time simultaneously exports judgement signal；
The handover module (30) controls the drive module (40) to export different driving signal according to the judgement signal；
The power tube (70；701,702) according to the drive signal switched conductive state.
2. light adjusting circuit according to claim 1, it is characterised in that：The current detection module (10) includes at least one ratio
Compared with device circuit, when there is electric current to flow through power tube, comparator output is height, when no electric current flows through power tube, comparator output
To be low, the signal of the current detection module output is detection signal.
3. light adjusting circuit according to claim 2, it is characterised in that：The input of the comparator is power tube (70；701,
702) output voltage (Vi1；Vi1, Vi2) and reference voltage (V1), it is electric that different power tubes connects different comparators respectively
Road, the reference voltage of different comparators input is identical or different.
4. light adjusting circuit according to claim 1, it is characterised in that：The judgment module (20) including logic judging circuit,
Trigger circuit；The logic judging circuit is connected with the output terminal of comparator in the current detection module (10), the logic
The detection signal that decision circuitry is used to be exported according to the current detection module (10) judges the power tube (70；701,702)
The upper current signal break-make duration, when the current signal break-make duration meeting preset condition logic judging circuit output sentence
For break signal to trigger circuit, the trigger circuit exports trigger signal to handover module (30).
5. light adjusting circuit according to claim 4, it is characterised in that：The preset condition includes：Current signal, which is connected, to be continued
Time is more than first threshold and break time is more than second threshold and is more than less than third threshold value or break time
Third threshold value.
6. light adjusting circuit according to claim 1, it is characterised in that：The handover module (30) including state storage circuitry and
Gate control circuit, the storage circuit connect the gate control circuit；The storage circuit includes counter, for storing
Effective on off state of switch simultaneously counts to effective on off state；The gate control circuit is defeated according to the numerical value of the counter
Go out gate control signal, the different numerical value corresponds to the different gate control signals, different gatings control letter
Number corresponding different gating control voltage (Vp).
7. light adjusting circuit according to claim 6, it is characterised in that：The drive module (40) is defeated including at least one both-end
Enter comparison circuit, the input terminal connection power tube (70 of the double-width grinding comparison circuit；701,702) output voltage
(Vi1；Vi1, Vi2), another input terminal connects the gating control voltage (Vp) of the gate control circuit output, described
The output terminal of double-width grinding comparison circuit connects the control terminal of the power tube, the output terminal of different double-width grinding comparison circuits
Connect different power tube control terminals.
8. light adjusting circuit according to claim 1, it is characterised in that：Further include excess temperature compensation circuit, the excess temperature compensation electricity
Road is connected with the handover module, when chip temperature is more than set temperature, the excess temperature compensation circuit output excess temperature control
Signal, the handover module controls the output voltage of the signal control drive module according to the excess temperature, described so as to control
The size of current of power tube output terminal.
9. light adjusting circuit according to claim 1, it is characterised in that：The sample circuit (60) includes sampling resistor (R2；
R21, R22), described sampling resistor one end connects the power tube (70；701,702) output terminal and the current detection module
(10), the other end connects the cathode of external rectification circuit.
10. a kind of LED illumination circuit, including one of the claim 1-9 light adjusting circuits, the LED illumination circuit further includes
Power switch, the power switch connects rectification circuit, for control circuit break-make, the anode connection LED of the rectification circuit
The power supply module of the anode of lamp string, the light adjusting circuit, the sample circuit of the cathode connection light adjusting circuit of the rectification circuit.
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| CN201610428659.6A CN105934040B (en) | 2016-06-15 | 2016-06-15 | A kind of light adjusting circuit |
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| CN201610428659.6A CN105934040B (en) | 2016-06-15 | 2016-06-15 | A kind of light adjusting circuit |
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| CN105934040B true CN105934040B (en) | 2018-06-19 |
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| CN106341925B (en) * | 2016-09-21 | 2018-05-08 | 深圳市芯飞凌半导体有限公司 | LED drive chip, can colour temperature adjust LED drive power system and LED lamp |
| CN106879124B (en) * | 2017-04-11 | 2019-08-13 | 朱小安 | Light adjusting circuit and light adjusting system |
| CN107182156B (en) * | 2017-05-23 | 2018-08-21 | 深圳市晟碟半导体有限公司 | A kind of system and method that lamp light-regulating and state reset are realized by switch |
| CN109392216B (en) * | 2018-03-22 | 2024-03-08 | 陕西亚成微电子股份有限公司 | Method for self-adjusting discharge current and LED silicon controlled rectifier dimming circuit |
| CN108650764A (en) * | 2018-07-12 | 2018-10-12 | 青岛亿联客信息技术有限公司 | Switch detection circuit and lamps and lanterns |
| TWI674752B (en) * | 2018-12-03 | 2019-10-11 | 新唐科技股份有限公司 | Drive protection circuit and operation circuit |
| CN110798943B (en) * | 2019-12-03 | 2023-08-15 | 珠海格力电器股份有限公司 | Current control circuit, method and driving system for realizing phase interleaving |
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