CN102032467B - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN102032467B CN102032467B CN200910179734.XA CN200910179734A CN102032467B CN 102032467 B CN102032467 B CN 102032467B CN 200910179734 A CN200910179734 A CN 200910179734A CN 102032467 B CN102032467 B CN 102032467B
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Abstract
The invention aims to provide a dimmer can be used for dimming and the illumination can be adjusted even in a range of low illumination. The invention provides a lighting device (1) which receives electric power supply from an alternating-current power supply (45) through a dimmer (47), and the lighting device (1) comprises a rectifying circuit (31), a step transformer (37), a light-emitting diode (LED) module (3), a dimming level detecting circuit (39) and a control circuit (41), wherein the step transformer (37) is connected with the output side of the rectifying circuit (31); the LED module (3) is connected with the output side of the step transformer (37); the dimming level detecting circuit (39) detects the dimming level of the dimmer (47); and the control circuit (41) controls the step transformer (37) to supply current corresponding to the dimming level detected by the dimming level detecting circuit (39) for the LED module (3), so that the working electric power of the control circuit (41) is supplied from the output side of the step transformer (37).
Description
Technical field
The lighting device of the light-emitting components such as (light emitting diodes) that the present invention relates to possess LED, particularly relates to the lamp circuit that light-emitting component is lighted.
Background technology
In recent years, from economizing the consideration of energy, the LED lighting device of the bulb-shaped of many replacement incandescent lamps has been proposed.The lamp circuit of LED lighting device possess to alternating electromotive force carry out rectification rectification circuit (Rectifier Circuit), be connected in the outlet side of rectification circuit buck-boost converter (Buck-Boost Converter), be connected in buck-boost converter outlet side light emitting module and control the control circuit etc. (reference example is as patent documentation 1) of buck-boost converter.
Patent documentation 1: TOHKEMY 2008-235530 communique
The means of always, incandescent lamp being carried out to light modulation extensively adopt the light modulator that uses TRIAC (TRIAC).Therefore wish also can continue to use existing light modulator in LED lighting device.
But in existing LED matrix, use in the situation of existing light modulator, existence can not be adjusted in the little scope of light modulation level (being the scope that illumination is low) problem of illumination.This is because if the light modulation level of light modulator is little, offers electric power corresponding the reducing therewith of LED lighting device, therefore can not guarantee to make to control the necessary voltage of the normal work of control circuit of buck-boost converter.Consequently, the action of control circuit stops, and LED extinguishes.
Summary of the invention
The object of the invention is to, providing a kind of can carry out light modulation and also can adjust the lighting device of illumination in the low scope of illumination with light modulator.
Lighting device of the present invention is to accept from AC power the lighting device that electric power is supplied with by light modulator, it possesses the rectification circuit that the electric power to supplying with by described light modulator carries out rectification, be connected in the buck-boost converter of the outlet side of described rectification circuit, be connected in the light emitting module of the outlet side of described buck-boost converter, detect the light modulation level sensitive circuit of the light modulation level of described light modulator, and control circuit, buck-boost converter described in this control circuit control, offer described light emitting module with the corresponding electric current of light modulation level that makes to detect with described light modulation level sensitive circuit, the electric power of described control circuit work is provided from the outlet side of described buck-boost converter.
If employing said structure, control circuit can provide and the corresponding electric current of light modulation level of light modulator light emitting module.Thereby, can use light modulator to carry out light modulation.If adopt said structure, make the electric power of control circuit action be provided by the outlet side of buck-boost converter.Even offer the corresponding minimizing of electric power of lighting device in the case of light modulation level is low, buck-boost converter also can keep output voltage constant.Even therefore also can make control circuit normally work in the low scope of illumination, therefore can adjust illumination.
Accompanying drawing explanation
Fig. 1 is the profile that represents the structure of the lighting device of embodiments of the present invention.
Fig. 2 is the circuit diagram of the lamp circuit of the lighting device of embodiments of the present invention.
The output voltage of rectification circuit when Fig. 3 (a) expression light modulation level is maximum, (b) voltage of the node N2 of buck-boost converter when expression light modulation level is maximum, (c) output voltage of rectification circuit when expression light modulation level is median, the voltage of the node N2 of buck-boost converter when (d) expression light modulation level is median.
Fig. 4 represents the input voltage of buck-boost converter and the figure of output voltage.
Fig. 5 is the curve map of the measurement result of the illumination change of the lighting device while representing to make the light modulation level of light modulator to change.
Symbol description
1 lighting device
3LED module
5 joining components
7 shells
9 globe holders
11 lamp circuits
13 circuit carriers
15 lamp holder members
17 insulated substrates
19 packaging bodies
21 screws
23 bonding agents
25 insulated substrates
27 distributions
31 rectification circuits
33 noise filter circuits
35 power factor correction circuits
37 buck-boost converters
39 light modulation level sensitive circuits
41 control circuits
43LED driver
45 AC powers
47 light modulators
The specific embodiment
With reference to the accompanying drawings embodiments of the present invention are elaborated.
< profile >
Fig. 1 is the profile that represents the structure of the lighting device of embodiments of the present invention.
Lighting device 1 possesses: have the LED (being equivalent to " light-emitting component ") as light source LED module (being equivalent to " light emitting module ") 3, carry shell 7, the globe holder 9 that covers LED module 3 that joining component 5, one end of LED module 3 possess joining component 5, make lamp circuit 11 that LED lights, lamp circuit 11 be accommodated in to inside and be disposed at the circuit carriers 13 in shell 7 and be arranged at the lamp holder member 15 of the other end of shell 7.
Joining component 5 is the disc-shaped components that are made up of the high material of heat conductivity, links by means of screw 21 and circuit carriers 13.As the high material of heat conductivity, can adopt the metal material of such as aluminium etc.Because the outer peripheral face of joining component 5 contacts with the inner peripheral surface of shell 7, the heat therefore producing at LED module 3 passes to shell 7 by joining component 5.
Shell 7 is cylindrical members of the material formation that heat-radiating properties is high.As the high material of heat-radiating properties, can adopt the metal material of such as aluminium etc.Hold circuit carriers 13 in the inside of shell 7.
Globe holder 9 is embedded into the slot part forming when joining component 5 and shell 7 are combined, by being fixed on joining component 5 and shell 7 at this slot part filling bonding agent 23.
Circuit carriers 13 is made up of insulating properties material.As insulating properties material, can adopt for example synthetic resin (specifically, being polybutyl terapthalate (PBT)).
< circuit structure >
Fig. 2 is the circuit diagram of the lamp circuit of the lighting device of embodiments of the present invention.
Lighting device 1 mainly possesses rectification circuit (Rectifier Circuit) 31, noise filtering (Noise Filter) circuit 33, power-factor improvement (Power Factor Correction) circuit 35, buck-boost converter (Buck-Boost Converter) 37, light modulation level sensitive circuit 39, control circuit 41 and LED module 3.Lighting device 1 is supplied with by adopting the light modulator of TRIAC (TRIAC) to accept electric power from AC power 45.
Below buck-boost converter 37, light modulation level sensitive circuit 39 and control circuit 41 are elaborated.
Buck-boost converter 37 is made up of inductor L1, switch element M1, rectifier cell FRD, capacitor C 8 and resistive element R6.The 1st connecting terminals of inductor L1 is connected to the lead-out terminal (hereinafter referred to as " plus end ") of the side of the positive electrode of rectification circuit 31, and the 2nd terminal of inductor L1 is connected in the lead-out terminal (hereinafter referred to as " negative terminal ") of the negative side of rectification circuit 31 by switch element M1.The 1st connecting terminals of capacitor C 8 is connected to the 1st terminal of inductor L1, and the 2nd terminal of capacitor C 8 is connected in the 2nd terminal of inductor by rectifier cell FRD.Rectifier cell specifically reverse recovery time short high speed commutation diode (Fast RecoveryDiode).The 1st connecting terminals of resistive element R6 is connected to the 1st terminal of capacitor C 8, and the 2nd connecting terminals of the R6 of resistive element is connected to the 2nd terminal of capacitor C 8.
Light modulation level sensitive circuit 39 is made up of resistive element R1, R2, R5, transistor Tr 1, Tr2, capacitor C 6, positive polarity thermistor PTC.The collector terminal of transistor Tr 2 is connected in the plus end of rectification circuit 31 by resistive element R5, the emitter-base bandgap grading connecting terminals of transistor Tr 2 is connected to the negative terminal of rectification circuit 31, and the base terminal of transistor Tr 2 is connected in collector terminal.Again, the collector terminal of transistor Tr 1 is connected in constant voltage terminal VDD by resistive element R1, and the emitter-base bandgap grading connecting terminals of transistor Tr 1 is connected to the negative terminal of rectification circuit 31, and the base terminal of transistor Tr 2 is connected in the base terminal of transistor Tr 1.Transistor Tr 1, Tr2 form current mirror (Current Mirror) circuit.The 1st connecting terminals of capacitor C 6 is connected to the control inputs terminal EX of control circuit 41, is connected in node N1 by resistive element R2 simultaneously, and the 2nd connecting terminals of capacitor C 6 is connected to the negative terminal of rectification circuit 31.Positive polarity thermistor PTC is that temperature more raises resistance value more with the element of non-linear rising.This element is inserted into and links in the collector terminal of transistor Tr 1 and the distribution of node N1, as playing a role according to the temp control switch of the illumination of temperature change LED module 3.
< circuit operation >
The circuit operation of illumination apparatus 1 describes below.
The output voltage of buck-boost converter 37 is set as with the forward voltage of LED module 3 roughly the same.In the present embodiment, be connected in series at interior 24 LED of LED module 3.When the forward voltage of each of LED is 3.2V, the forward voltage of LED module 3 is 76.8V.
While utilizing the control of control circuit 41 to make switch element M1 turn to conducting from cut-off, the output voltage of rectification circuit 31 is applied in inductor L1, and electric current flows into switch element M1 by inductor L1.During switch element M1 conducting, the electric current that flows into inductor L1 increases in certain proportion.This ratio is determined by the output voltage of rectification circuit 31 and the inductance value of inductor L1.Because electric current flows into inductor L1, in inductor L1, put aside magnetic energy.
Otherwise by means of the control of control circuit 41, while making switch element M1 transfer to cut-off from conducting, the electric current that flows to switch element M1 is cut off.Magnetic energy based on putting aside in inductor L1 produces counter electromotive force, and electric current sequentially flows to inductor L1, rectifier cell FRD, LED module 3, inductor L1.Between the switch element M1 off period, the electric current that flows into LED module 3 reduces by a certain percentage.This ratio is determined by the inductance value of the forward voltage of LED module 3 and the forward voltage sum of rectifier cell FRD and inductor L1.
The switch of control circuit 41 gauge tap element M1, makes to flow into LED module 3 with the corresponding electric current of voltage to control inputs terminal EX input.In the present embodiment, the input voltage that is input to control inputs terminal EX is higher, and the electric current that flows into LED module 3 is less.
In light modulation level sensitive circuit 39, flow into resistive element R5 with the corresponding pulsating current of output voltage fluctuation (Pulsating Current) of rectification circuit 31.This pulsating current is copied by current mirroring circuit, and therefore resistive element R1 also flows into identical pulsating current.The integrating circuit forming by means of resistive element R2 and capacitor C 6, is imported into the control inputs terminal EX of control circuit 41 after the voltage of node N1 averages out.Carry out in situation that light modulation lights a lamp with light modulator 47, the output voltage average value of rectification circuit 31 reduces, and the mean value that therefore flows into the pulsating current of resistive element R1, R5 declines, the mean value of the voltage of node N1 this share that only rises accordingly.That is to say, the average voltage of node N1 is exactly the voltage that represents the light modulation level of light modulator 47.Control circuit 41, according to changing to the voltage of control inputs terminal EX input the electric current that flows into LED module 3, therefore can change illumination corresponding to the light modulation level of light modulator 47.
The output voltage of rectification circuit when Fig. 3 (a) expression light modulation level is maximum, (b) voltage of the node N2 of buck-boost converter when expression light modulation level is maximum, (c) output voltage of rectification circuit when expression light modulation level is median, the voltage of the node N2 of buck-boost converter when (d) expression light modulation level is median.
The output voltage of light modulator 47 is maintained at 0 since 0 intersection till pass through defer time Td in the half period exchanging, if through Td time delay, changed with sinusoidal waveform.Adjustment Td time delay is equivalent to adjust light modulation level.
The output voltage of rectification circuit 31 is as shown in Fig. 3 (a), (c), in the half period exchanging, first rise to and arrive voltage Va, from arriving, voltage Va starts till process Td time delay is maintained at voltage Va, if through Td time delay, change with sinusoidal waveform, voltage Va is the voltage rise share that power factor correction circuit 35 produces.Further, as shown in Fig. 3 (a), in light modulator 47, be maximum even make light modulation level, time delay, Td can not be 0ms yet.
The voltage of node N2 in buck-boost converter 37 is as shown in Fig. 3 (b), (d), with amplitude of fluctuation change slightly.But the output voltage of buck-boost converter 37, owing to utilizing capacitor C8 smoothing, is therefore that galvanic current is pressed.
Fig. 4 represents the input voltage of buck-boost converter and the figure of output voltage.Input voltage IN changes corresponding to light modulation level.On the other hand, output voltage OUT maintains 76.8V at light modulation level in the scope from maximum (MAX) to minimum (MIN).
If the power input terminal Vin of control circuit 41 is connected in the situation of input side of buck-boost converter 37 (being equivalent to prior art), light modulation level is reduced down from maximum, and the input voltage that is input to power input terminal Vin also decreases.Then in the time that the input voltage that is input to power input terminal Vin reaches 45V, control circuit 41 quits work, and LED module 3 is turned off the light.Therefore, only the scope till light modulation level is from maximum to d1 can be carried out light modulation.
On the other hand, the power input terminal Vin of control circuit 41 is connected in the situation of outlet side of buck-boost converter 37 (being equivalent to present embodiment), at light modulation level in the scope of peak to peak, input voltage to control inputs terminal V in is maintained at 76.8V, is not less than 45V.Thereby, can carry out light modulation in the scope of the peak to peak from light modulation level.
As mentioned above, according to present embodiment, control circuit 41 can will offer light emitting module with the corresponding electric current of light modulation level of light modulator 47.Thereby can adopt light modulator stably to carry out light modulation.And, the electric power that control circuit 41 is worked is provided from the outlet side of buck-boost converter 37.Even if the output voltage of buck-boost converter 37 is little at light modulation level, the electric power that offers lighting device 1 is therewith in the situation of corresponding reduction, more than also can being maintained at the minimum input voltage (45V) of control circuit 41.Thereby, even in the low scope of illumination, also can make control circuit 41 stably work, therefore can adjust illumination corresponding to the light modulation level of light modulator 47.
< verifies >
The illumination change of lighting device 1 when inventor has measured the light modulation level change that makes light modulator 47.Fig. 5 is the curve map that represents this measurement result.Known according to Fig. 5, make Td increase time delay (reducing light modulation level), just can make illumination decline.The illumination of the minimum lighting device 1 of control circuit 41 is with Td linear change time delay.Even this be because by time delay Td be set as minimum (make light modulation level for minimum), the output voltage of buck-boost converter 37 can be lower than the minimum input voltage (45V) of control circuit 41 yet.Thereby known can generation in the low scope of illumination, because the input voltage deficiency of control circuit 41 causes LED module 3 situation of light-off suddenly, can be adjusted illumination in vast illumination range.
Other features of < >
(1) inductor of buck-boost converter
Using in the light modulator 47 of triac (TRIAC), be minimum of a value even make light modulation level, output voltage is not 0 yet, but output virtual value (root meansquare; Root-mean-square value) voltage (in the situation that supply voltage is 100V) of tens of V left and right.
In buck-boost converter 37, set the inductance value of inductor L1, the light modulation level that makes light modulator 47 is for hour, and the voltage producing on the 2nd terminal of capacitor C8 is not less than makes the work minimum input voltage (45V) of use of control circuit 41.The voltage producing on the 2nd terminal of so-called capacitor C8 is the voltage that is input to the power input terminal Vin of control circuit 41.By means of this, when being reduced, light modulation level can make control circuit 41 stably work before LED module 3 is turned off the light.
(2) preventing of lighting device flicker
In buck-boost converter 37, the capacitance of capacitor C 8 is equal to or greater than 80 μ F.Can make like this output voltage of buck-boost converter 37 level and smooth, can prevent the flicker of lighting device.
Again, in light modulation level sensitive circuit 39, the capacitance of capacitor C 6 is equal to or greater than 0.1 μ F, is equal to or less than 0.5 μ F (capacitance≤0.5 μ F of 0.1 μ F≤C6).By means of this, can make the suitably equalization of voltage of node N1, can prevent the flicker of lighting device.
(3) overheat protective function (Over Temperature Protection)
In light modulation level sensitive circuit 39, there is positive polarity thermistor PTC as temp control switch.Thereby the in the situation that of LED module 3 or control circuit 41 abnormal heating, positive polarity thermistor PTC action, can limit the electric current that flows into resistive element R1.By means of this, can reduce the electric current that flows into LED module 3, consequently, can suppress heating, protection lighting device 1.Further, such abnormal heating can not occur in the situation that lighting device 1 is used in common environment, and for example, may occur in the case of abnormal high temperature environment (lighting device 1 is arranged in airtight utensil etc. situation) uses.Positive polarity thermistor PTC can adopt for example to have in temperature does not almost have resistance during lower than 95 ℃, and resistance is sharply increased to material more than 4.7k Ω more than 95 ℃ time.
(4) forward voltage of LED module
The forward voltage of LED module 3 is 76.8V.And the light-off voltage of LED module 3 is 50V.These two voltages are all output voltage (virtual value, the tens of V left and right) height of light modulator 47 hour than the light modulation level of light modulator 47.The in the situation that of prior art, in such situation, easily occur in scope that illumination is low and can not adjust the problem of illumination.In the present embodiment, even in such situation, also can adjust illumination in the low scope of illumination.
(5) guarantee the regular event of light modulator
At input side contact resistance Ra, the Rb of rectification circuit 31.Resistance R b is the resistive element that the maintenance electric current (Holding Current) that makes light modulator 47 flows through use.The resistance value of resistive element Rb adopts for example 80 Ω.Can guarantee so the normal work of light modulator 47.
(6) supply voltage of control circuit
In lighting device 1, adopt the LED driver 43 that the supply voltage of civil power can be input to power input terminal Vin.The input voltage of for example MIP551 and MIP552 is 80～280V.By means of this, the circuit that does not need the supply voltage of preparing generation LED driver to use, can reduce component number.
< variation >
According to embodiment, structure of the present invention is illustrated above, but the invention is not restricted to above-mentioned embodiment.For example can enumerate variation as described below.
(1) in embodiment as temp control switch, possess positive polarity thermistor PTC, this is to realize the option that overheat protective function is used.Also can not possess temp control switch.Again, in embodiment, temp control switch adopts positive polarity thermistor PTC, but is not limited to this, also can adopt temperature fuse etc.If particularly adopted lower than set point of temperature, the element that conducting ends more than set point of temperature can stop the electric current supply to LED module 3 in the situation that set point of temperature is above.
(2) in embodiment, on the outlet side of rectification circuit 31, connect noise filter circuit 33, but be not limited to this, also can adopt the method for the input side that is connected to rectification circuit 31.
(3) in embodiment, at buck-boost converter 37, switch element M1 is connected to than inductor L1 and more leans on the place of low potential side, but is not limited to this, can be also that switch element M1 is connected in the place of more leaning on hot side than inductor L1.In this case, the 1st terminal of inductor L1 is connected in the plus end of rectification circuit 31 by switch element M1, and the 2nd connecting terminals of inductor L1 is connected to the negative terminal of rectification circuit 31.
(4) in embodiment, possess power factor correction circuit 35, this is to realize the option that power factor improvement function is used.Also can not possess power factor correction circuit 35.
(5) in embodiment, rectification circuit 31 is full-wave rectifying circuits, but is not limited to this, can be also half-wave rectifying circuit.
(6) in embodiment, switch element adopts MOS (Metal OxideSemiconductor) transistor, but be not limited to this, also can adopt IGBT (InsulatedGate Bipolar Transistor), bipolar transistor etc.
(7), in embodiment, the transistor that forms current mirroring circuit adopts bipolar transistor, but is not limited to this, also can adopt MOS transistor.
(8) in embodiment, in LED module 3, the series connection number of LED is 24, its two groups or four groups is connected in parallel, but the invention is not restricted to this, and the number of LED is as long as suitably determine according to needed brightness.
(9) in embodiment, LED driver 43 adopts MIP551 or MIP552, but the invention is not restricted to this.In embodiment, enumerated the concrete numerical value of minimum input voltage etc., but this just illustrates again.
(10) in embodiment, even light modulation level hour, is also maintained at the output voltage of buck-boost converter 76.8V, but the invention is not restricted to this.If the output voltage of light modulation level buck-boost converter hour is also higher than the higher voltage in the light-off voltage of the minimum input voltage of control circuit and LED module, can carry out light modulation from being up to minimum scope at light modulation level.For example, in the present embodiment, if if the output voltage of hour buck-boost converter is higher than 50V for light modulation level, can carry out light modulation from being up to minimum scope at light modulation level.The output voltage of light modulation level buck-boost converter hour can suitably be adjusted by the inductance value of adjusting inductor.
Industrial applicability
The present invention can be used in general illumination.
Claims (10)
1. a lighting device, is to accept from AC power the lighting device that electric power is supplied with by light modulator, it is characterized in that possessing:
Rectification circuit, carries out rectification to the electric power providing by described light modulator;
Buck-boost converter, is connected in the outlet side of described rectification circuit, even in the case of correspondingly also maintaining the output of the voltage of regulation with the light modulation level of described light modulator from the voltage change of described rectified current output;
Light emitting module, is connected in the outlet side of described buck-boost converter;
Light modulation level sensitive circuit, detects the light modulation level of described light modulator; And
Control circuit, controls described buck-boost converter, so that the corresponding electric current of light modulation level detecting with described light modulation level sensitive circuit is offered to described light emitting module,
The electric power that makes described control circuit work is provided from the outlet side of described buck-boost converter.
2. lighting device according to claim 1, is characterized in that, described buck-boost converter possesses:
Inductor, the 1st connecting terminals of this inductor is connected to the side in the side of the positive electrode of described rectification circuit and the lead-out terminal of negative side, and the 2nd terminal of this inductor is connected in the side of the positive electrode of described rectification circuit and the output of negative side the opposing party in giving by switch element; And
Capacitor, the 1st connecting terminals of this capacitor is connected to the 1st terminal of above-mentioned inductor with on the terminal being connected with the lead-out terminal of the side of the positive electrode of described rectification circuit in the 2nd terminal, the 2nd terminal of this capacitor is connected in the 1st of above-mentioned inductor by rectifier cell and gives with the end being connected with the lead-out terminal of negative side described rectification circuit in the 2nd terminal
Described control circuit has accepts the power input terminal that electric power is supplied with, and the power input end sub-connection of described control circuit is given in the 2nd end of described capacitor.
3. lighting device according to claim 2, it is characterized in that, set the inductance value of described inductor, be not less than so that the light modulation level of described light modulator is the voltage hour producing the minimum input voltage that makes described control circuit action use on the 2nd terminal of described capacitor.
4. lighting device according to claim 2, is characterized in that, the capacitance of described capacitor is equal to or greater than 80 μ F.
5. lighting device according to claim 1, is characterized in that, described light modulation level sensitive circuit, by detecting the voltage between the side of the positive electrode of described rectification circuit and the lead-out terminal of negative side, detects the light modulation level of described light modulator.
6. lighting device according to claim 5, is characterized in that, described light modulation level sensitive circuit possesses:
The 1st transistor, the 1st transistorized the 1st terminal is connected in by the 1st resistive element on the lead-out terminal of side of the positive electrode of described rectification circuit, the 1st transistorized the 2nd connecting terminals is connected on the lead-out terminal of negative side of described rectification circuit, and the 1st transistorized control terminal is connected in described the 1st end and gives; , and
The 2nd transistor, the 2nd transistorized the 1st terminal is connected in the constant voltage source that the voltage higher than the voltage of the negative side of described rectification circuit occurs by the 2nd resistive element, the 2nd transistorized the 2nd connecting terminals is connected on the lead-out terminal of negative side of described rectification circuit, the 2nd transistorized control end gives and is connected in described the 1st transistorized control terminal
Described control circuit has the control inputs terminal of the voltage of accepting the light modulation level that represents light modulator, and the control input end sub-connection of described control circuit is on the terminal of the opposition side of the terminal being connected with described constant voltage source of described the 2nd resistive element.
7. lighting device according to claim 6, is characterized in that, on the distribution between terminal and described the 2nd transistorized the 1st terminal of opposition side of the terminal being connected with described constant voltage source that links described the 2nd resistive element, inserts temp control switch.
8. lighting device according to claim 6, is characterized in that,
Described light modulation level sensitive circuit also has on the terminal of opposition side that the 1st connecting terminals is connected to the terminal being connected with described constant voltage source of described the 2nd resistive element and the 2nd connecting terminals is connected to the capacitor of the lead-out terminal of the negative side of described rectification circuit, and the capacitance of described capacitor is equal to or greater than 0.1 μ F, is equal to or less than 0.5 μ F.
9. lighting device according to claim 1, it is characterized in that, described light emitting module possesses multiple light-emitting components of the insertion of connect on the distribution that links the input terminal of side of the positive electrode and the input terminal of negative side, and the summation of the forward voltage of the light-emitting component of described series connection insertion is higher than the output voltage of the light modulation level of described light modulator described light modulator hour.
10. lighting device according to claim 1, is characterized in that, also connects the resistive element that maintains electric current for flowing through described light modulator at the input side of described rectification circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910179734.XA CN102032467B (en) | 2009-09-29 | 2009-09-29 | Lighting device |
| JP2009226644A JP5410906B2 (en) | 2009-09-29 | 2009-09-30 | Lighting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910179734.XA CN102032467B (en) | 2009-09-29 | 2009-09-29 | Lighting device |
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| CN102032467A CN102032467A (en) | 2011-04-27 |
| CN102032467B true CN102032467B (en) | 2014-06-11 |
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| CN200910179734.XA Expired - Fee Related CN102032467B (en) | 2009-09-29 | 2009-09-29 | Lighting device |
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| JP5526095B2 (en) * | 2011-09-20 | 2014-06-18 | 日立アプライアンス株式会社 | LED lighting device |
| JP5972557B2 (en) * | 2011-11-28 | 2016-08-17 | ローム株式会社 | LED driver module and LED bulb using the same |
| JP5915230B2 (en) * | 2012-02-13 | 2016-05-11 | 神保電器株式会社 | LED lighting system |
| KR102140275B1 (en) * | 2014-03-13 | 2020-07-31 | 엘지이노텍 주식회사 | Circuit and method for driving light emitting device |
| JP5932874B2 (en) * | 2014-04-07 | 2016-06-08 | 株式会社藤商事 | Game machine |
| JP5932873B2 (en) * | 2014-04-07 | 2016-06-08 | 株式会社藤商事 | Game machine |
| CN215268806U (en) * | 2021-06-28 | 2021-12-21 | 上海三思电子工程有限公司 | LED drive circuit and LED lamp |
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| JP2003007493A (en) * | 2001-06-25 | 2003-01-10 | Matsushita Electric Works Ltd | Electric discharge lamp lighting equipment |
| JP4796849B2 (en) * | 2006-01-12 | 2011-10-19 | 日立アプライアンス株式会社 | DC power supply, light-emitting diode power supply, and lighting device |
| JP4748025B2 (en) * | 2006-10-18 | 2011-08-17 | パナソニック電工株式会社 | Phase control power supply |
| JP2008235530A (en) * | 2007-03-20 | 2008-10-02 | Matsushita Electric Ind Co Ltd | Light emitting diode driving device and illuminator using the same |
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| CN1625319A (en) * | 2003-12-05 | 2005-06-08 | 通用电气公司 | Universal platform for phase dimming discharge lighting ballast and lamp |
| CN101513131A (en) * | 2006-07-18 | 2009-08-19 | 卢特龙电子公司 | Thermal protection for lamp ballasts |
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| JP特开2007-189004A 2007.07.26 |
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| JP特开2008-235530A 2008.10.02 |
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| JP2011165317A (en) | 2011-08-25 |
| JP5410906B2 (en) | 2014-02-05 |
| CN102032467A (en) | 2011-04-27 |
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