CN104582059B - A kind of light-dimming method, adjuster and light adjusting system - Google Patents
A kind of light-dimming method, adjuster and light adjusting system Download PDFInfo
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- CN104582059B CN104582059B CN201310475943.5A CN201310475943A CN104582059B CN 104582059 B CN104582059 B CN 104582059B CN 201310475943 A CN201310475943 A CN 201310475943A CN 104582059 B CN104582059 B CN 104582059B
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The embodiment of the invention discloses a kind of light-dimming method, adjuster and light adjusting system.Present invention method includes：Detect the conducting situation of the main switch of dimmer switch, then the first current source and the second current source are controlled according to the conducting situation of the main switch, wherein, when main switch is turned on, judge whether load voltage is less than preset voltage value, if being less than, connect the first current source, if being not less than, the first current source and the second current source are disconnected；When main switch disconnects, the first current source or the second current source are connected, wherein, the first current source and the second current source are connected in parallel, and the output of the first current source is constant current, and the output of the second current source is variable current.The present embodiment can increase dimming scope, reduce power consumption, and can ensure to load flicker free or glimmer in the case where dimmer switch disconnects.
Description
Technical field
The present invention relates to dimmer switch field, more particularly to a kind of light-dimming method, adjuster and light adjusting system.
Background technology
At present, most of dimmer switch on the market all designs for two-wire system, i.e., there was only live wire in the cavity of dimmer switch
And load line, without zero line.In order to reduce the loss of dimmer switch, the dimmer switch of copped wave type is all designed to zero passage and opened
Close, for example, ahead of the curve under cut pattern, dimmer switch will disconnect in current zero-crossing point；Under the rear pattern along cut, light modulation is opened
Pass will be closed in voltage over zero.To ensure dimmer switch energy normal work, in each light modulation half cycle, it is necessary to ensure stabilization
Zero crossing.And because the control circuit of dimmer switch needs certain power consumption, in dimmer switch main switch element（Such as FET
With bidirectional thyristor etc.）In the case of disconnection, still some leakage current flows through load lamp loop.When tunable load lamp is white heat
During lamp, load lamp shows as stable impedance operator, and dimmer switch can find stable zero crossing.But as various countries are to illuminated rows
The requirement more and more higher of industry energy efficiency, more compact fluorescent lamps（CFL, Compact Fluorescent Lamp）With it is luminous
Diode (LED, Light Emitting Diode) light fixture starts increasingly to popularize, and CFL and LED are that to be classified as semiconductor type non-
Lienar for is loaded, and they are internal to be provided with rectifier circuit and safety electric capacity to handle electromagnetic wave noise problem.When these types
When lamp accesses two-wire system dimmer switch, because the equiva lent impedance of load lamp is larger, it will cause the inside of two-wire system dimmer switch
Circuit can not obtain enough power supplys, simultaneously as load voltage declines slow, dimmer switch side will to be caused to detect alternating current
Voltage is offset, and is caused in dimming process, load lamp flicker, when dimmer switch disconnects, load lamp flicker or glimmer.
In the prior art, using obtaining a low impedance path by the way of the safety electric capacity in parallel of load two ends, to solve
Certainly there is the technical problem flashed in the case where dimmer switch disconnects in load lamp.But for the load of CFL and LED type, by
It is too small in load lamp power, and internal rectifier circuit, the load of this type can be caused to show high impedance status, stored
Electric charge inside safety electric capacity can not sine wave each half cycle repid discharge, cause the voltage change at load lamp two ends not
Substantially, the brightness change therefore in dimming process is not also just obvious.
The content of the invention
The embodiments of the invention provide a kind of light-dimming method, adjuster and light adjusting system, dimming scope can be increased, dropped
Low-power consumption, and can ensure to load flicker free or glimmer in the case where dimmer switch disconnects.
A kind of light-dimming method is present embodiments provided, can mainly be included：
Detect the conducting situation of the main switch of dimmer switch；
When main switch is turned on, judge whether load voltage is less than preset voltage value, if being less than, connect the first electric current
Source, if being not less than, disconnects the first current source and the second current source；
When main switch disconnects, the first current source or the second current source are connected, the first current source and the second current source are in parallel
Connection, the output of the first current source is constant current, and the output of the second current source is variable current.
Optionally, when load voltage is not less than preset voltage value, and the step of the first current source of disconnection and the second current source
After rapid, in addition to：The direction of load voltage is detected, if load voltage is in trailing edge, the second current source is connected；If load
When voltage is in rising edge, then the first current source and the second current source are remained open.
Optionally, if load voltage is in trailing edge, after the step of connecting the second current source, in addition to：Detection the
The waveform of two current sources, when the waveform of the second current source is risen with predetermined waveform, and load voltage drops to preset voltage value
When, connect the first current source.
Optionally, the conducting situation of the main switch of detection dimmer switch, is specifically included：When load voltage is less than half-wave,
Pass through the conducting situation of test pulse testing current main switch；When load voltage is more than half-wave, surveyed using predefined electric current
Try the conducting situation of waveforms detection main switch.
The present embodiment additionally provides a kind of adjuster, can mainly include：First current source, the second current source and detection control
Device processed；
First current source and the second current source are connected in parallel, and the output of the first current source is constant current, the second current source
Output is variable current, and the first current source and the second current source are respectively used to as load discharge；
Detection controller is used for the conducting state for detecting the main switch of dimmer switch, when main switch is turned on, judges load
Whether voltage is less than preset voltage value, if being less than, connects the first current source, if being not less than, and disconnects the first current source and the
Two current sources；When main switch disconnects, the first current source or the second current source are connected.
Optionally, the first current source and the second current source include respectively：Switching tube and current detecting unit；Current detecting list
Member is used for basis and flows through the size of current of the first current source or the second current source come the break-make of controlling switch pipe.
Optionally, switching tube includes triode or FET.
Optionally, detection controller can include：Voltage amplitude detection unit, voltage direction detection unit and voltage controlled current
Source unit；Wherein, voltage amplitude detection unit, for detecting load voltage, when load voltage is less than preset voltage value, is connected
First current source, when load voltage is not less than preset voltage value, then disconnects the first current source and the second current source；Voltage controlled current
Source unit, the waveform for detecting the second current source, judges whether the waveform of the second current source is changed with predetermined waveform；Voltage side
To detection unit, the direction for detecting load voltage if load voltage is in trailing edge, is connected the second current source, also used
Risen in the waveform that the second current source is detected when voltage controlled current source unit with predetermined waveform, and detect load voltage decline
During to preset voltage value, the first current source is connected；If load voltage is in rising edge, the first current source and the are remained open
Two current sources.
The present embodiment additionally provides a kind of light adjusting system, can mainly include：
Dimmer switch, load and above-mentioned any adjuster；
Dimmer switch includes main switch, and adjuster is connected in parallel on load two ends；
Main switch is used for the break-make for controlling dimmer switch.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
The conducting situation for the main switch that the embodiment of the present invention passes through dimmer switch utilizes constant electric current come control electric current source
Source is constantly load discharge, keeps load to be in low impedance state, in the case where dimmer switch disconnects, and connects the first electric current
Source or the second current source, it is ensured that load both end voltage is in low impedance state, it is ensured that load will not flash or glimmer；Dimming
Cheng Zhong, if load voltage is less than preset voltage value, connects the first current source, it is ensured that load both end voltage is in Low ESR shape
State, if being not less than, disconnects the first current source and the second current source, reduces power consumption, and dimmer switch can detect stable electricity
The crossover point signal of pressure or electric current, it is ensured that light modulation drive cycle is stable, and load occurs without flicker, and can increase loaded light modulation model
Enclose.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For art personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a flow chart of light-dimming method in the embodiment of the present invention；
Fig. 2 is another flow chart of light-dimming method in the embodiment of the present invention；
Fig. 3 is the schematic diagram of supply voltage rising edge and trailing edge in the embodiment of the present invention；
Fig. 4 is a schematic diagram of adjuster in the embodiment of the present invention；
Fig. 5 is another schematic diagram of adjuster in the embodiment of the present invention；
Fig. 6 is a schematic diagram of progress voltage direction detection in the embodiment of the present invention；
Fig. 7 is another schematic diagram of progress voltage direction detection in the embodiment of the present invention；
Fig. 8 is the schematic diagram of current source in the embodiment of the present invention；
Fig. 9 is the schematic diagram of light adjusting system in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other implementation that those skilled in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
The embodiments of the invention provide a kind of light-dimming method and.The embodiment of the present invention also provides corresponding light adjusting system,
And adjuster.Describe in detail individually below, refer to Fig. 1 to Fig. 9.
Embodiment one
Can be specifically the method for the light modulation of load characteristic adjuster the embodiments of the invention provide a kind of light-dimming method.
A kind of light-dimming method, including：Detect the conducting situation of the main switch of dimmer switch；When main switch is turned on, judge
Whether load voltage is less than preset voltage value, if being less than, connects the first current source, if being not less than, disconnects the first current source
With the second current source；When main switch disconnects, the first current source or the second current source, the first current source and the second current source are connected
It is connected in parallel, the output of the first current source is constant current, and the output of the second current source is variable current.
Referring to Fig. 1, idiographic flow can be as follows：
101st, judge whether the main switch of dimmer switch turns on；
If the main switch conducting of dimmer switch, performs step 102, judge whether load voltage is less than preset voltage value；
If the main switch of dimmer switch is not turned on, step 105 is performed, the first current source or the second current source is connected.
Specifically, when load voltage is less than half-wave, can be by the conducting situation of test pulse testing current main switch；
When load voltage is more than half-wave, the conducting situation of predefined testing current waveforms detection main switch can be used.It should manage
Solution, when load voltage is more than half-wave, load voltage is in trailing edge, when load voltage is less than half-wave, load voltage
In rising edge.
102nd, when main switch is turned on, judge whether load voltage is less than preset voltage value；
If load voltage is less than preset voltage value, step 103 is performed, the first current source is connected；If load voltage is not small
In preset voltage value, then step 104 is performed, disconnect the first current source and the second current source.
If the 103, load voltage is less than preset voltage value, the first current source is connected；
In the present embodiment when determining load voltage less than preset voltage value, the first current source is connected, load is in
Low impedance state, it is ensured that dimmer switch obtains stable zero crossing.
If the 104, load voltage is not less than preset voltage value, the first current source and the second current source are disconnected, wherein, first
Current source and the second current source are connected in parallel, and the output of the first current source is constant current, and the output of the second current source is variable
Electric current；
Adjuster in the present embodiment can include two current sources, for convenience, be respectively depicted as the first electric current
Source and the second current source.Wherein, the first current source and the second current source are connected in parallel.
What the first current source in the present embodiment was exported is fixed current, and the output of the second current source is variable current.Can
With understanding, the first current source is constant current source, and the second current source is electric for the output of voltage-controlled current source, i.e. the second current source
Stream is by input voltage control.
Wherein, the first current source is that voltage swing is enabled, that is to say, that when load voltage is less than preset voltage value（Should
When understanding, now usual main switch is off half cycle）, connect the first current source, it is ensured that load both end voltage is total
It is to be in low impedance state.And the second current source is voltage direction enable, that is to say, that when load voltage direction is in trailing edge
When, the second current source is connected, it is ensured that load both end voltage is gradually reduced, while maintaining relatively low power consumption.
When load voltage is more than or equal to preset voltage value, the first current source and the second current source are all disconnected, can be with
Reduce the power of adjuster consumption.
105th, when main switch disconnects, the first current source or the second current source are connected.
When the main switch for detecting dimmer switch disconnects, the first current source or the second current source are connected.For example, can connect
Logical first current source carrys out repid discharge, at the same time, the current waveform that the second current source can also be controlled according to voltage-controlled current source by
Gradually discharge, load voltage is down to reduced levels, and keep low impedance state.
From the foregoing, it will be observed that the conducting situation for the main switch that the embodiment of the present invention passes through dimmer switch control the first current source and
Second current source, wherein, the first current source and the second current source are connected in parallel, and the output of the first current source is constant current, the
The output of two current sources is variable current, is constantly load discharge using constant current source, keeps load to be in Low ESR
State, in the case where dimmer switch disconnects, connects the first current source or the second current source, it is ensured that load both end voltage is in low
Impedance state, it is ensured that load will not flash or glimmer；In dimming process, if load voltage is less than preset voltage value, connect
First current source, it is ensured that load both end voltage is in low impedance state, if being not less than, disconnects the first current source and the second electric current
Source, reduces power consumption, and dimmer switch can detect the voltage of stabilization or the crossover point signal of electric current, it is ensured that light modulation drive cycle is steady
Fixed, load occurs without flicker, and can increase loaded dimming scope.
Embodiment two
For ease of understanding, another embodiment of light-dimming method provided in an embodiment of the present invention is described below.It may be appreciated
It is, when load voltage is not less than preset voltage value, to disconnect after the first current source and the second current source, detection can also be passed through
The direction of load voltage controls the first current source and the second current source, under different load voltage directions, at dimmer switch
In different mode of operations, the first current source and the second current source can be controlled by different modes.Referring to Fig. 2, tool
Body flow can be as follows：
201st, judge whether the main switch of dimmer switch turns on；
If the main switch conducting of dimmer switch, performs step 202, judge whether load voltage is less than preset voltage value；
If the main switch of dimmer switch is not turned on, step 209 is performed, the first current source or the second current source is connected.
Specifically, when load voltage is less than half-wave, can be by the conducting situation of test pulse testing current main switch；
When load voltage is more than half-wave, the conducting situation of predefined testing current waveforms detection main switch can be used.
202nd, when main switch is turned on, judge whether load voltage is less than preset voltage value；
If load voltage is less than preset voltage value, step 203 is performed, the first current source is connected；If load voltage is not small
In preset voltage value, then step 204 is performed, disconnect the first current source and the second current source.
If the 203, load voltage is less than preset voltage value, the first current source is connected；
When determining load voltage less than preset voltage value, the first current source is connected, load is in low impedance state,
It can ensure that dimmer switch obtains stable zero crossing.When determining load voltage less than preset voltage value, the first electric current is connected
Source, terminates flow.
If the 204, load voltage is not less than preset voltage value, the first current source and the second current source are disconnected；
205th, judge whether the direction of load voltage is in trailing edge；
It should be appreciated that there is a main switch in dimmer switch, when main switch is conducting, supply voltage is added in load
On, when main switch disconnects, load voltage assume that to be zero.Dimmer switch is by controlling the conducting of main switch and disconnection can be with
The received energy of control load.Therefore, the dimmer switch in the present embodiment is when load voltage is in trailing edge and rising edge
Disconnect, dimmer switch needs different characteristics to go matching.In rising edge, dimmer switch will produce larger charging current,
Trailing edge, dimmer switch is mainly possible to produce multiple zero crossings.Specific to see Fig. 3, Fig. 3 is supply voltage rising edge with
The schematic diagram on edge drops.
If load voltage is in trailing edge, step 206 is performed, the second current source is connected；If in rising edge, performing
Step 208, the first current source and the second current source are remained open.
The 206th, if load voltage is in trailing edge, the second current source is connected；
When detecting load voltage and being in trailing edge, the second current source is connected, relatively low power consumption can be maintained, can be with
Proof load both end voltage is gradually reduced so that the change of the predefined voltage waveform of current following and change, it is ensured that light modulation open
When the main switch of pass is closed, the slope of load voltage waveform is always greater than supply voltage slope, so that dimmer switch main switch
The zero crossing of mistake will not be produced and enough power supplys can be obtained.
207th, the waveform of the second current source is detected, when the waveform of the second current source is risen with predetermined waveform, and electricity is loaded
When pressure drops to preset voltage value, the first current source is connected；
It is above-mentioned to be in trailing edge in load voltage, connect after the second current source, can also be to the waveform of the second current source
Detected, when the waveform for detecting the second current source is risen with predetermined waveform, and now, load voltage drops to default electricity
During pressure value, the first current source is connected, it is ensured that load both end voltage is always at low impedance state.Because electric current gradually increases,
When supply voltage is higher, electric current is relatively low, when supply voltage is relatively low, and electric current is higher, therefore can reduce overall power consumption.
If the 208th, detect load voltage in rising edge, the first current source and the second current source are remained open；
If detect load voltage in rising edge, keep the state of the first current source and the second current source constant,
Namely continue to disconnect the first current source and the second current source, terminate flow.
209th, when main switch disconnects, the first current source or the second current source are connected.
From the foregoing, it will be observed that the conducting situation for the main switch that the embodiment of the present invention passes through dimmer switch control the first current source and
Second current source, wherein, the first current source and the second current source are connected in parallel, and the output of the first current source is constant current, the
The output of two current sources is variable current, is constantly load discharge using constant current source, keeps load to be in Low ESR
State, in the case where dimmer switch disconnects, connects the first current source or the second current source, it is ensured that load both end voltage is in low
Impedance state, it is ensured that load will not flash or glimmer；In dimming process, if load voltage is less than preset voltage value, connect
First current source, it is ensured that load both end voltage is in low impedance state, if being not less than, disconnects the first current source and the second electric current
Source, reduces power consumption, and dimmer switch can detect the voltage of stabilization or the crossover point signal of electric current, it is ensured that light modulation drive cycle is steady
Fixed, load occurs without flicker, and can increase loaded dimming scope.And with stable dimming effect, power consumption is relatively low, adjusting
In the case that photoswitch disconnects, load keeps low impedance state, and load will not flash or glimmer, reduces heating.
Embodiment three
In order to be better understood from the above method, the present embodiment additionally provides a kind of adjuster, can be specifically load characteristic
Adjuster, specifically see Fig. 4.
A kind of adjuster, including：First current source 401, the second current source 402 and detection controller 403；Wherein, first
The current source 402 of current source 401 and second is connected in parallel, and the output of the first current source 401 is constant current, the second current source 402
Output is variable current, and the first current source 401 and the second current source 402 are respectively used to the input capacitance electric discharge for load；Inspection
The conducting state that controller 403 is used to detect the main switch of dimmer switch is surveyed, when main switch is turned on, whether load voltage is judged
Less than preset voltage value, if being less than, the first current source 401 is connected, if being not less than, the first current source 401 and second is disconnected
Current source 402；When main switch disconnects, the first current source 401 or the second current source 402 are connected.
It is preferred that, the adjustment implement body in the present embodiment can be load characteristic adjuster.The adjuster possesses internal electricity
Stream source, the half cycle disconnected in the main switch of dimmer switch, can provide leakage current and give two-wire system dimmer switch, it is possible to be EMI
The internal electric source of element and dimmer switch provides low impedance path, prevents load lamp from being flashed in the case of shut-off.
Wherein, the main switch of dimmer switch is the switch element inside dimmer switch, and the main switch specifically can be field-effect
Pipe, controllable silicon or relay etc., are not limited specifically in the present embodiment.
The first current source 401 output of adjuster is fixed current in the present embodiment, and what the second current source 402 was exported is
Variable current.It is understood that the first current source 401 is constant current source, the second current source 402 is voltage-controlled current source, i.e.,
The output current of second current source 402 is by input voltage control.
Wherein, the first current source 401 is that voltage swing is enabled, that is to say, that when load voltage is less than preset voltage value
（It should be appreciated that now usual main switch is off half cycle）, connect the first current source 401, it is ensured that load two ends
Voltage is always at low impedance state.And the second current source 402 is voltage direction enable, that is to say, that when load voltage direction
During in trailing edge, the second current source 402 is connected, it is ensured that load both end voltage is gradually reduced, while maintaining relatively low
Power consumption.
It should be noted that, can also be in load end provided with the progress rectification of rectification unit 404.
Specifically, referring to Fig. 5, the detection controller 403 in the present embodiment can specifically include：Voltage amplitude detection is single
Member 4031, voltage direction detection unit 4032 and voltage controlled current source unit 4033.
Wherein, voltage amplitude detection unit 4031, for detecting load voltage, when load voltage is less than preset voltage value
When, the first current source 401 is connected, it is ensured that load both end voltage is in low impedance state, when load voltage is not less than predeterminated voltage
During value, then the first current source 401 and the second current source 402 are disconnected, reduce power consumption.
Voltage controlled current source unit 4033, the waveform for detecting the second current source 402, judges the ripple of the second current source 402
Whether shape is changed with predetermined waveform.
Voltage direction detection unit 4032, the direction for detecting load voltage if load voltage is in trailing edge, connects
Logical second current source 402, it is ensured that load both end voltage is gradually reduced, while maintaining relatively low power consumption, is additionally operable to work as voltage-controlled electricity
Stream source unit 4033 is detected the waveform of the second current source 402 and risen with predetermined waveform, and is detected load voltage and dropped to
During preset voltage value, the first current source 401 is connected, it is ensured that load both end voltage is always at low impedance state；If load voltage
During in rising edge, then the first current source 401 and the second current source 402 are remained open.
Wherein, if load voltage is in trailing edge or constant, when dimmer switch main switch disconnects, voltage direction detection unit
The descending slope of load voltage can also be obtained.
Wherein, voltage direction detection can be realized by electric capacity or microcontroller A/D samplings.It is described in detail individually below：
Referring to Fig. 6, when voltage V is in rising edge, it is positive direction to flow through electric current on electric capacity C1, triode Q1 is in and led
Logical state, colelctor electrode control can connect control electric current source internal system switch S, one of current source is in disconnection
State；When voltage V is in trailing edge, it is negative direction to flow through electric current on electric capacity C1, and triode Q1 ends, and current supply switch is not by this
Circuit is controlled.Wherein, the arrow declined in Fig. 6 represents positive direction, and the arrow of rising represents negative direction.
Referring to Fig. 7, voltage V inputs microcontroller A/D ports, microcontroller sampled voltage V by partial pressure, and compare
DV/DT change, output control control electric currents source internal switch S break-make.
First current source 401 and the second current source 402 may be respectively used for constant current source constantly for load
Input capacitance is discharged, wherein, the first current source 401 can be constant current source, and the second current source 402 can be voltage controlled current
Source, the first current source 401 and the second current source 402 can include respectively：Switching tube S and current detecting unit 405, the switching tube
S can be triode or FET, not limit specifically.
It should be noted that, the first current source 401 and the second current source 402 in the present embodiment can also include electric current respectively
Feedback unit 406, for the testing result of current detecting unit to be fed back into switching tube S.
Fig. 8 specifically is see, Fig. 8 is the schematic diagram of current source.When switching tube S is opened, electric current flows through current detecting unit
405, when electric current exceedes setting electric current value, current feedback unit 406 closes switching tube S, and now electric current reduces.Repeat above-mentioned mistake
Journey, it is possible to achieve current constant control.Wherein, current detecting unit can be made up of two parts detection unit, and current detecting and electric current are anti-
Feedback, to realize the detection of the first current source 401 and the second current source 402.
The load characteristic adjuster provided in the present embodiment not can be used for compact fluorescent lamp singly（CFL, Compact
Fluorescent Lamp）And light emitting diode（LED,Light Emiiting Diode）, bulb, low pressure can also be applied to
The electronic transformer of Halogen lamp LED, the inductive transformer of low-voltage halogen lamp or the non-linear type load of other semiconductor types etc., specifically not
Limited by the present embodiment.
Wherein, the specific implementation of the present embodiment is referring also to above-described embodiment, and here is omitted.
From the foregoing, it will be observed that the present embodiment includes the first current source 401, the second current source 402 and detection controller 403, wherein,
First current source 401 and the second current source 402 are connected in parallel, and the output of the first current source 401 is constant current, the second current source
402 outputs are variable currents, and the first current source 401 and the second current source 402 are respectively used to the input capacitance electric discharge for load；
Detection controller 403 is used for the conducting state for detecting the main switch of dimmer switch, when main switch is turned on, judges that load voltage is
It is no to be less than preset voltage value, if being less than, the first current source 401 is connected, if being not less than, the first current source 401 and the is disconnected
Two current sources 402；When main switch disconnects, the first current source 401 or the second current source 402 are connected.The present embodiment passes through light modulation
The conducting situation of the main switch of switch comes control electric current source, is constantly load discharge using constant current source, keeps load
In low impedance state, in the case where dimmer switch disconnects, the first current source or the second current source are connected, it is ensured that load two ends
Voltage is in low impedance state, it is ensured that load will not flash or glimmer；In dimming process, if load voltage is less than predeterminated voltage
Value, then connect the first current source, it is ensured that load both end voltage is in low impedance state, if being not less than, disconnects the first current source
With the second current source, power consumption is reduced, dimmer switch can detect the voltage of stabilization or the crossover point signal of electric current, it is ensured that light modulation
Drive cycle is stable, and load occurs without flicker, and can increase loaded dimming scope, and the adjuster in the present embodiment has
Less volume.
Example IV
The present embodiment additionally provides a kind of light adjusting system.A kind of light adjusting system, can specifically include：Adjuster 501, light modulation
Switch 502 and load 503, dimmer switch 502 include main switch 5021, and adjuster 501 is connected in parallel on load two ends；Main switch 5021
Break-make for controlling dimmer switch 502.Referring to Fig. 9, wherein, the load in Fig. 9 is represented with load equivalent impedance.
Wherein, the adjustment implement body in the present embodiment see above-described embodiment, and here is omitted.
It should be appreciated that when there is multiple shunt loads in light adjusting system, can be in light adjusting system provided with multiple tune
Whole device, for example, the two ends adjuster in parallel that can be loaded at each.
In addition, the present embodiment can also set reinforcement to prevent the trigger current source of Interference from the power supply wire mistake.
Can be with one of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method is
The hardware of correlation is instructed to complete by program, described program can be stored in a kind of computer-readable recording medium, on
It can be read-only storage, disk or CD etc. to state the storage medium mentioned.
A kind of light-dimming method provided by the present invention, adjuster and light adjusting system are described in detail above, this
Apply specific case in text to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to
Help to understand method and its core concept of the invention；Simultaneously for those skilled in the art, according to the embodiment of the present invention
Thought, will change in specific embodiments and applications, in summary, and this specification content should not be construed as
Limitation of the present invention.
Claims (9)
1. a kind of light-dimming method, it is characterised in that including：
Detect the conducting situation of the main switch of dimmer switch；
When the main switch is turned on, judge whether load voltage is less than preset voltage value, if being less than, connect the first electric current
Source, if being not less than, disconnects the first current source and the second current source；
When the main switch disconnects, the first current source or the second current source, first current source and the second current source are connected
It is connected in parallel, the first current source output is constant current, the second current source output is variable current.
2. according to the method described in claim 1, it is characterised in that when load voltage is not less than preset voltage value, and disconnect
After the step of first current source and the second current source, in addition to：
Detect the direction of load voltage；
If load voltage is in trailing edge, the second current source is connected；
If load voltage is in rising edge, the first current source and the second current source are remained open.
3. method according to claim 2, it is characterised in that if the load voltage is in trailing edge, connects second
After the step of current source, in addition to：
The waveform of second current source is detected, when the waveform of second current source is risen with predetermined waveform, and electricity is loaded
When pressure drops to preset voltage value, the first current source is connected.
4. according to the method in any one of claims 1 to 3, it is characterised in that the main switch of the detection dimmer switch
Conducting situation, specifically include：
When load voltage is less than half-wave, by the conducting situation of main switch described in test pulse testing current, wherein, when described
When load voltage is less than half-wave, the load voltage is in rising edge；
When load voltage is more than half-wave, using the conducting situation of main switch described in predefined testing current waveforms detection, its
In, when the load voltage is more than half-wave, the load voltage is in trailing edge.
5. a kind of adjuster, it is characterised in that including：First current source, the second current source and detection controller；
First current source and the second current source are connected in parallel, and first current source output is constant current, and described the
The output of two current sources is variable current, and first current source and the second current source are respectively used to as load discharge；
The detection controller, the conducting state of the main switch for detecting dimmer switch, when the main switch is turned on, judges
Whether load voltage is less than preset voltage value, if being less than, connects the first current source, if being not less than, disconnects the first current source
With the second current source；When the main switch disconnects, the first current source or the second current source are connected.
6. adjuster according to claim 5, it is characterised in that
First current source and the second current source include respectively：Switching tube and current detecting unit；
Current detecting unit be used for controlled according to the size of current of first current source or the second current source is flowed through described in open
Close the break-make of pipe.
7. adjuster according to claim 6, it is characterised in that
The switching tube includes triode or FET.
8. the adjuster according to any one of claim 5 to 7, it is characterised in that the detection controller includes：Voltage
Amplitude detection unit, voltage direction detection unit and voltage controlled current source unit；
Voltage amplitude detection unit, for detecting load voltage, when load voltage is less than preset voltage value, connects the first electric current
Source, when load voltage is not less than preset voltage value, then disconnects the first current source and the second current source；
Whether voltage controlled current source unit, the waveform for detecting the second current source judges the waveform of the second current source with default ripple
Deformation；
Voltage direction detection unit, the second electricity if load voltage is in trailing edge, is connected in the direction for detecting load voltage
Stream source, is additionally operable to predetermined waveform rise when the voltage controlled current source unit detects the waveform of second current source, and
When detecting load voltage and dropping to preset voltage value, the first current source is connected；If load voltage is in rising edge, keep
Disconnect the first current source and the second current source.
9. a kind of light adjusting system, it is characterised in that including：
Dimmer switch, load and the adjuster as any one of claim 5 to 8；
The dimmer switch includes main switch, and the adjuster is connected in parallel on load two ends；
The main switch is used for the break-make for controlling dimmer switch.
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| CN201310475943.5A CN104582059B (en) | 2013-10-12 | 2013-10-12 | A kind of light-dimming method, adjuster and light adjusting system |
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| CN201310475943.5A CN104582059B (en) | 2013-10-12 | 2013-10-12 | A kind of light-dimming method, adjuster and light adjusting system |
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| CN104582059B true CN104582059B (en) | 2017-10-13 |
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Cited By (1)
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|---|---|---|---|---|
| US11838999B2 (en) | 2018-07-16 | 2023-12-05 | Jiaxing Super Lighting Electric Appliance Co., Ltd. | LED lighting system, apparatus, and dimming method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106485858B (en) * | 2015-08-28 | 2018-10-16 | 西门子瑞士有限公司 | Visual notification equipment and its driving method |
| US11191136B2 (en) | 2018-07-16 | 2021-11-30 | Jiaxing Super Lighting Electric Appliance Co., Ltd. | LED lighting system, apparatus, and dimming method |
| CN113141490B (en) * | 2020-01-20 | 2023-05-09 | 中强光电股份有限公司 | Light emitting module, projection device and operation method |
| CN117528858B (en) * | 2024-01-08 | 2024-04-09 | 杭州罗莱迪思科技股份有限公司 | Hidden-lighting controllable dimming lamp control method |
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| CN2070078U (en) * | 1989-12-13 | 1991-01-23 | 姜呈怿 | Source adjustable illuminating lamp device |
| CN102640570A (en) * | 2009-10-30 | 2012-08-15 | 皇家飞利浦电子股份有限公司 | Selectively activated rapid start/bleeder circuit for solid state lighting system |
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| US8212491B2 (en) * | 2008-07-25 | 2012-07-03 | Cirrus Logic, Inc. | Switching power converter control with triac-based leading edge dimmer compatibility |
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| US3822394A (en) * | 1971-09-30 | 1974-07-02 | Matsushita Electric Works Ltd | Discharge lamp lighting apparatus |
| CN2070078U (en) * | 1989-12-13 | 1991-01-23 | 姜呈怿 | Source adjustable illuminating lamp device |
| CN102640570A (en) * | 2009-10-30 | 2012-08-15 | 皇家飞利浦电子股份有限公司 | Selectively activated rapid start/bleeder circuit for solid state lighting system |
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| CN104582059A (en) | 2015-04-29 |
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