CN1719963A - Light modulating device - Google Patents

Light modulating device Download PDF

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Publication number
CN1719963A
CN1719963A CN 200410063622 CN200410063622A CN1719963A CN 1719963 A CN1719963 A CN 1719963A CN 200410063622 CN200410063622 CN 200410063622 CN 200410063622 A CN200410063622 A CN 200410063622A CN 1719963 A CN1719963 A CN 1719963A
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CN
China
Prior art keywords
phase
light
modulating device
light modulation
light modulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 200410063622
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Chinese (zh)
Inventor
张曦春
胡逢康
朱士海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to CN 200410063622 priority Critical patent/CN1719963A/en
Priority to PCT/IB2005/051981 priority patent/WO2006006085A1/en
Priority to CNA2005800229950A priority patent/CN1981564A/en
Priority to EP05748050A priority patent/EP1767067A1/en
Priority to JP2007519923A priority patent/JP2008506226A/en
Publication of CN1719963A publication Critical patent/CN1719963A/en
Pending legal-status Critical Current

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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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac
    • 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/08—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • H05B41/42—Controlling the intensity of light discontinuously in two steps only

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

This invention relates to a light regulation device coupled on the ballast of a control lamp having a bypass device for bypassing a phase-cut device. Said device bypasses said phase-cut device when it is not actuated and starts the device when it is actuated for a light-regulation period. Therefore, phase cut does not happen during most of the time by bypassing phase-cut devices in the non-actuated period so as to reduce harmonic waves and electromagnetic interference, yet in the phase-cut period, only a fixed cut-angle is used, which is firstly selected on the smallest detected phase cutting angle.

Description

A kind of light modulating device
Technical field
The present invention relates to a kind of light modulating device, this light modulating device comprises and is used for the phase cut means in the cycle of ac supply signal cutting phase angle, this phase cut means and the AC power cord coupled in series that is used for carrying ac supply signal.
The invention still further relates to a kind of ballast that comprises light modulating device, comprise the lamp of ballast, and the lamp socket that comprises ballast.
Background technology
A kind of like this light modulating device can be learned from U.S. Patent No. 5559395.Known light modulating device is widely used when light is regulated.In above-mentioned patent, provide the triac dimmable device of a phase control.This triac dimmable device is coupled in the power line.The series circuit and the triac that consist of a variable resistor and a capacitor are connected in parallel, so that trigger triac with optional angle, are used for the phase place conducting.Diac is coupled between the grid of the node of variable resistance and capacitor and triac.By changing the resistance of variable resistance, can control the phase angle of alternating voltage.Light modulating device cuts off the part of every half period of alternating voltage immediately after voltage over zero, and this part or angle that should the half period be adjustable.
By means of this triac dimmable device, can regulate the phase angle of alternating voltage, and different phase-cut angle is corresponding with different luminous levels.Yet, by means of this triac dimmable device, under the light modulation situation, can be with every half period of optional angle cutting power supply.Therefore, can not avoid harmonic distortion and electromagnetic interference (EMI), especially when the angle of selecting is big.Less when conduction phase angle, when promptly phase-cut angle was big, lamp may glimmer.
Summary of the invention
One object of the present invention is to provide a kind of light modulating device with less harmonic distortion.
For this purpose, this light modulating device is characterised in that, it comprises and be used for the by-pass collar of bypass phase cut means, and this by-pass collar is arranged to, bypass phase cut means when not activateding, and when activateding, in the light modulation time period, start phase cut means.
The present invention is based on such understanding, promptly by bypass cutter sweep during the deactivated period, in the most of the time, there is not phase cut to take place, thereby reduce harmonic wave and electromagnetic interference widely, and during phase cut, only using fixing cutting angle, this cutting angle is preferred just on the phase-cut angle that can survey of minimum.
An execution mode according to a kind of light modulating device of the present invention is characterised in that the stationary phase cutting angle.By means of fixing phase-cut angle, needn't consider the value of phase-cut angle by the ballast circuit of light modulating device control, so it just in time can determine the light modulation period.Disturb minimum in order to make, phase-cut angle can be selected as being used for the minimum detectable angle of light modulation.
Another execution mode according to a kind of light modulating device of the present invention is characterised in that phase cut means is arranged to the positive half cycle or the negative half period in the cycle of cutting.Only the phase cut in half period also can be transmitted light modulation information, and this is owing to the higher fact of the frequency of AC power.By this way, and not only cut positive half period but also cut negative half-cycle and compare, during the light modulation time period, harmonic distortion in circuit and electromagnetic interference are reduced manyly.
Another execution mode according to a kind of light modulating device of the present invention is characterised in that by-pass collar comprises: first actuating device is used for starting phase cut means with the frequency of ac supply signal; With second actuating device, be used for starting phase cut means with the doubled frequency of ac supply signal, first and second actuating devices are with coupled in series.Two actuating devices are arranged to transmit the different information that are used for light modulation.
Provide a kind of according to another implementation of the invention and the combined ballast of light modulating device according to the present invention, this ballast comprises the light adjusting controller of controlling light modulation with control signal, it is characterized in that this light adjusting controller is arranged to regulate control signal according to the light modulation time period.This ballast supplies to the power control light modulation of ballast according to light modulation time period rather than use, so, for light modulation, realize control in output place of ballast circuit rather than in the input of ballast circuit to the power that supplies to lamp.Thus, reduced harmonic distortion in ballast circuit.
Description of drawings
With reference to the execution mode of describing by means of in the following description example, and will understand and know these aspects of the present invention and others with reference to accompanying drawing, in the accompanying drawings:
Fig. 1 represents first execution mode according to a kind of light modulating device 10 of the present invention;
Fig. 2 A represents second execution mode according to a kind of light modulating device 110 of the present invention;
Fig. 2 B is illustrated in the waveform according to the several voltage signals in light modulating device of the present invention and the ballast;
Fig. 3 A represents the 3rd execution mode according to a kind of light modulating device 210 of the present invention;
Fig. 3 B represents from the waveform of the voltage of a kind of light modulating device output according to the present invention;
Fig. 4 represents the 4th execution mode according to a kind of light modulating device 310 of the present invention;
Fig. 5 represents the block diagram according to ballast of the present invention; And
Fig. 6 represents an execution mode according to extraction element 463 of the present invention.
In the accompanying drawings, the identical label among all figure is used to refer to similar part.
Embodiment
Fig. 1 represents first execution mode according to a kind of light modulating device 10 of the present invention.Light modulating device 10 comprises dimmer 20 and by-pass collar 30.Dimmer 20 is a kind of phase cut dimmer, as triac dimmable device, thyristor dimmer, power switch dimmer or MOSFET dimmer.
Under normal condition of work, by-pass collar 30 does not activated.As a result, dimmer 20 is by by-pass collar 30 bypass, and promptly dimmer 20 is inoperative.Under the light modulation situation, by-pass collar 30 activated.Then, the AC electric current passes through dimmer 20, and during light modulation time period DTP (Dimming Time Period), the phase angle of dimmer 20 cutting ac supply signal AC.So, in normal working conditions, in ac supply signal AC, there is not phase cut to take place, the harmonic distortion from phase cut does not take place, and at dimming period, it is minimum that harmonic distortion keeps.
Fig. 2 A represents second execution mode according to a kind of light modulating device 110 of the present invention.Light modulating device 110 comprises triac dimmable device 120 and by-pass collar 130.Triac dimmable device 120 comprises resistor R 1 and R2, reaches capacitor C1, capacitor C1 and triac 140 coupled in parallel, so that triggering triac 140 under a stationary phase cutting angle PCA (phase cut angle) is used for the phase place conducting.Diac 150 is coupled between the grid of resistor R 1 and R2 and triac 140.By-pass collar 130 comprises button P1.
In normal working conditions, button P1 does not activated 1, and promptly the AC electric current passes through button P1, and bypass triac dimmable device 120.Therefore in ac supply signal AC, do not have phase cut to take place.
Under the light modulation situation, user's illumination as requested is actuation button P1 in light modulation period DTP.
During light modulation period DTP, triac dimmable device 120 is coupled on the AC power cord A.During the positive half period of ac supply signal AC, capacitor C1 is just charged, and the voltage Vc1 that strides across capacitor C1 is elevated to the trigger voltage of diac 150.By means of the just triggering of diac 150, (be phase-cut angle, PCA) trigger triac 140 afterwards in a fixed delay angle of the positive half period of ac supply signal AC.During the negative half-cycle of ac supply signal AC, capacitor C1 is by negative charging, and voltage Vc1 is reduced to the negative trigger voltage of diac 150.By means of the negative triggering of diac 150, (be phase-cut angle, PCA) trigger triac 140 afterwards in a fixed delay angle of the negative half-cycle of ac supply signal AC.Fixed delay angle is determined by the trigger voltage of R1, R2, C1 and diac 150.
The voltage waveform Vin modulated light device 120 cutting backs of the ac supply signal AC of input are expressed as voltage VAB in Fig. 2 B.In order to compare input voltage, Vin is also illustrated among Fig. 2 B.In normal working conditions, the voltage waveform of VAB is identical with the voltage waveform of Vin.Under the light modulation situation, cut each half period of the voltage waveform of VAB by means of a phase-cut angle PCA.Phase cut occurs over just during the light modulation time period DTP, and promptly the user presses the button the time period of P1.Outside light modulation time period DTP, there is not phase cut, promptly ac supply signal AC has the complete period.Therefore, under normal operation, there is not harmonic distortion to produce.And, further be illustrated among Fig. 2 B be voltage VS, VAB, Vs, Vk, Vf, Vc, VD, and reference voltage V ref1 and Vref2 and CLK describe with reference to Fig. 5 and Fig. 6.
Fig. 3 A represents the 3rd execution mode according to a kind of light modulating device 210 of the present invention.Compare with light modulating device 110, in light modulating device 210, thyratron 240 is used for replacing triac 140, and diode 232 is arranged in parallel with button P1.When actuation button P1, each positive half period of ac supply signal AC is cut with stationary phase cutting angle PCA by phase cut means 230.Voltmeter at terminal A and the ac supply signal AC of B place is shown among Fig. 3 B.If thyratron 240 and diode 232 oppositely couple, then each negative half-cycle of ac supply signal AC is cut with stationary phase cutting angle PCA by phase cut means.
Fig. 4 represents the 4th execution mode according to a kind of light modulating device 310 of the present invention.Compare with light modulating device 110, another button P2 and button P1 coupled in series, and be arranged in parallel with diode 342.When actuation button P1, phase cut means 320 is worked in the same manner with the phase cut means of representing in Fig. 2 A 120.If actuation button P2 only, then phase cut means 320 is worked in the same manner with the phase cut means of representing in Fig. 2 A 220.So the out of phase that causes ac supply signal AC that activates respectively of button P1 and P2 is cut.
By this way, can transmit by phase cut ac supply signal AC according to the different information of light modulation time period DTP.Button P1 and P2 can representative of consumer different requirements.The actuating of button P1 can be represented and add lustre to, and the actuating of button P2 can be represented light modulation, and vice versa.And the actuating of button P1 can be represented light modulation, and the actuating of button P2 can be represented other function, as the color adaptation of lamp.But button P1 and P2 can be the buttons by user's direct control, maybe can be by the exercisable remote-operable switch of the remote control unit such as the infrared remote control device of knowing.
In the above execution mode of light modulating device, can introduce a variable resistance, so that control phase cutting angle PCA.
Fig. 5 represents the calcspar according to ballast 400 of the present invention.Ballast 400 uses in combination with the light modulating device that provides in the present invention.Ballast 400 comprises: electromagnetic interface filter 410 is used for the filtered electrical magnetic disturbance; Rectifier 420 is used for an ac supply signal AC to be rectified into dc power signal DC; Power factor controller 430 is used for the power controlling factor, and a Converter controller 440 is used for controlling a converter; And converter 450, be used for becoming dc voltage conversion high-frequency ac voltage to activate lamp.
Ballast 400 also comprises the light adjusting controller 460 that is used for controlling light modulation.Light adjusting controller 460 comprises: extraction element 463 is used for extracting dim signal D-SIG (dimming signal) from the output 422 of rectifier 420; With signal processing apparatus 456, be used for a dim signal D-SIG to be transformed into control signal C-SIG (control signal).
The output 422 of rectifier 420, i.e. voltage VS, DC power signal DC is illustrated among Fig. 2 B.During light modulation period DTP, DC power signal DC carries the dim signal D-SIG with stationary phase cutting angle PCA.Extraction element 463 extracts a dim signal D-SIG from DC power supply DC, i.e. voltage VC is as shown in Fig. 2 B.
Signal processing apparatus 456 comprises clock generator 468, is used for producing a clock signal clk, as shown in Fig. 2 B.After extraction element 463 receives dim signal D-SIG, signal processing apparatus 456 is handled dim signal D-SIG according to clock signal clk, for example by the quantity of counting pulse signal or the time period of counting dim signal D-SIG, and export a control signal C-SIG, be Vd, as shown in Fig. 2 B.
Control signal C-SIG is imported into Converter controller 440.Converter controller 440 is conventional Converter controller IC, as the half-bridge controller IC of having bought easily on market.Under normal conditions, the frequency of Converter controller 440 usefulness current signal O-SIG control converter.
Under the light modulation situation, after controller signals C-SIG is imported into Converter controller 440, change current signal O-SIG (original signal) according to control signal C-SIG.Under normal conditions, the control signal that is input to Converter controller 440 can be counted as zero or other value, and not to the influence of the current signal O-SIG of Converter controller 440.Converter controller 440 is worked according to current signal O-SIG.
Fig. 6 represents an execution mode according to extraction element 463 of the present invention.Extraction element 463 comprises two comparator A1 and A2 and low pass filter, and this low pass filter comprises resistor R 3 and R4 and capacitor C2.
As voltage Vs, promptly from the voltage of the DC power signal DC of rectifier 420, when being lower than reference voltage V ref1, comparator A1 output high level voltage VK.When voltage Vs is higher than reference voltage V ref1, comparator A1 output low level voltage VK.The waveform table of voltage Vk is shown among Fig. 2 B.
When the low pass filter of voltage VK by forming by R3, R4 and C2, eliminate undesired pulse signal.In Fig. 2 B, undesired pulse be outside light modulation time period DTP than burst pulse and in light modulation time period DTP than the pulse after the broad pulse.The waveform of VF, i.e. the output of low pass filter is illustrated among Fig. 2 B.The VF of low-pass filtering compares with reference voltage V ref2 in comparator A2.Then, one of comparator A2 output and the corresponding pulse signal of light modulation time period DTP (that is, dim signal), the i.e. Vc that in Fig. 2 B, represents.Vc then, dim signal is imported into signal processor 466.
Ballast provided by the invention can be installed in lamp or the lamp socket.The present invention also provides a kind of dimming controlling method, this method comprises: phase angle, the translate phase cutting angle of cutting in the cycle of power supply signal is control signal and according to the control signal light modulation, wherein, cutting phase angle and determine control signal according to the light modulation time period during the light modulation time period only.
Should be noted that above-mentioned execution mode explanation rather than restriction the present invention, and those skilled in the art can design other execution mode without departing from the scope of the appended claims.In claims, any label that is placed among the bracket should not be construed the restriction claim.Speech " comprises " and is not precluded within the element unlisted in the claim or the existence of step.Do not get rid of the existence of a plurality of such elements at the speech " " of element front.The present invention can be by means of the hardware that comprises several different elements with by means of the computer realization of suitably programming.In listing the unit claim of several means, the several of these devices can be implemented by the hardware of hardware and identical entry.Any order is not indicated in the use of speech first, second and third grade.These speech are appreciated that and are title.

Claims (13)

1. a light modulating device (10) comprising:
Phase cut means (20), be used for cutting the phase angle (PCA) in the cycle of ac supply signal (AC), described phase cut means (20) and AC power cord (A) coupled in series that is used for carrying described ac supply signal (AC), it is characterized in that, described light modulating device (10) comprises and is used for the by-pass collar (30) of the described phase cut means of bypass (20), described by-pass collar (30) is arranged to the described phase cut means of bypass (20) when not activateding, and when activateding, start described phase cut means (20), continue a light modulation time period (DTP).
2. light modulating device according to claim 1 (10), wherein, described cutting phase angle (PCA) is fixed.
3. light modulating device according to claim 1 (10), wherein, described phase cut means (20) is arranged to cut the positive half period and the negative half-cycle of ac supply signal (AC).
4. light modulating device according to claim 1 (10), wherein, described phase cut means (20) is arranged to cut the positive half period or the negative half-cycle of ac supply signal (AC).
5. light modulating device according to claim 1 (10) is characterized in that, described by-pass collar (30) comprising: first actuating device (P1) is used for starting described phase cut means (20) with the frequency of ac supply signal (AC); With the second actuating device (P2; 342), be used for starting described phase cut means (20) with the doubled frequency of ac supply signal (AC), the first and second actuating device (P1; P2 and 342) coupled in series.
6. light modulating device according to claim 5 (10) is characterized in that, the actuating that reduces the light modulation time period (DTP) of brightness occurs in first actuating device (P1) or the second actuating device (P2; During 342) actuating, occur in second actuating device (P2 and increase the actuating of the period of brightness; 342) or during the actuating of first actuating device (P1).
One kind with according to the combined ballast (400) of each described light modulating device (10) of claim 1-4, described ballast (400) comprise with control signal (C-SIG) control light modulation light adjusting controller (460),
It is characterized in that described light adjusting controller (460) is arranged to regulate described control signal (C-SIG) according to the light modulation time period (DTP).
8. ballast according to claim 7 (400), it is characterized in that, described light adjusting controller (460) comprises and is used for the clock signal generating apparatus (468) of clocking (CLK), and described light adjusting controller (460) is arranged to determine described control signal (C-SIG) by the clock period of counting clock signal during the light modulation time period (DTP).
9. a lamp is characterized in that, described lamp comprises ballast according to claim 7 (400).
10. a lamp is characterized in that, described lamp comprises ballast according to claim 8 (400).
11. a lamp socket is characterized in that, described lamp socket comprises ballast according to claim 7 (400).
12. a lamp socket is characterized in that, described lamp socket comprises ballast according to claim 8 (400).
13. a dimming controlling method comprises:
Phase angle, the translate phase cutting angle of cutting in the cycle of power supply signal is control signal and according to the control signal light modulation, it is characterized in that, wherein, cutting phase angle and determine control signal according to the light modulation time period during the light modulation time period only.
CN 200410063622 2004-07-08 2004-07-08 Light modulating device Pending CN1719963A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN 200410063622 CN1719963A (en) 2004-07-08 2004-07-08 Light modulating device
PCT/IB2005/051981 WO2006006085A1 (en) 2004-07-08 2005-06-15 Lamp-dimming through bypassing of phase-cutting
CNA2005800229950A CN1981564A (en) 2004-07-08 2005-06-15 Dimming device
EP05748050A EP1767067A1 (en) 2004-07-08 2005-06-15 Lamp-dimming through bypassing of phase-cutting
JP2007519923A JP2008506226A (en) 2004-07-08 2005-06-15 Dimmer configuration, ballast, lamp, lamp socket, dimming control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200410063622 CN1719963A (en) 2004-07-08 2004-07-08 Light modulating device

Publications (1)

Publication Number Publication Date
CN1719963A true CN1719963A (en) 2006-01-11

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CN 200410063622 Pending CN1719963A (en) 2004-07-08 2004-07-08 Light modulating device
CNA2005800229950A Pending CN1981564A (en) 2004-07-08 2005-06-15 Dimming device

Family Applications After (1)

Application Number Title Priority Date Filing Date
CNA2005800229950A Pending CN1981564A (en) 2004-07-08 2005-06-15 Dimming device

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EP (1) EP1767067A1 (en)
JP (1) JP2008506226A (en)
CN (2) CN1719963A (en)
WO (1) WO2006006085A1 (en)

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CN105263242A (en) * 2015-11-24 2016-01-20 杰华特微电子（杭州）有限公司 Method for detecting conduction phase angle of light modulator
WO2018058298A1 (en) * 2016-09-27 2018-04-05 绿仕科技控股有限公司 Dimming switch system and method

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JP5401833B2 (en) * 2007-12-10 2014-01-29 東芝ライテック株式会社 Light control device
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US9253843B2 (en) 2008-12-12 2016-02-02 02Micro Inc Driving circuit with dimming controller for driving light sources
US9386653B2 (en) 2008-12-12 2016-07-05 O2Micro Inc Circuits and methods for driving light sources
CN102014540B (en) 2010-03-04 2011-12-28 凹凸电子（武汉）有限公司 Drive circuit and controller for controlling electric power of light source
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CN105263242A (en) * 2015-11-24 2016-01-20 杰华特微电子（杭州）有限公司 Method for detecting conduction phase angle of light modulator
WO2018058298A1 (en) * 2016-09-27 2018-04-05 绿仕科技控股有限公司 Dimming switch system and method
CN109792820A (en) * 2016-09-27 2019-05-21 路晟（上海）科技有限公司 Dimmer switch system and method

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Publication number Publication date
WO2006006085A1 (en) 2006-01-19
JP2008506226A (en) 2008-02-28
CN1981564A (en) 2007-06-13
EP1767067A1 (en) 2007-03-28

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