CN101630920A - LED lighting lamp and power supply device thereof - Google Patents
LED lighting lamp and power supply device thereof Download PDFInfo
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- CN101630920A CN101630920A CN200910203466A CN200910203466A CN101630920A CN 101630920 A CN101630920 A CN 101630920A CN 200910203466 A CN200910203466 A CN 200910203466A CN 200910203466 A CN200910203466 A CN 200910203466A CN 101630920 A CN101630920 A CN 101630920A
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Abstract
The invention discloses an LED lighting lamp and a power supply device thereof. The power supply device comprises a rectification waveform obtaining device for obtaining a voltage rectification waveform of an alternating power supply and a power supply output device for obtaining power from an expected voltage value over a half period of the voltage rectification waveform of the alternating power supply. The LED lighting lamp comprises a power supply device part and an LED lamp, wherein the power supply device part obtains power from the expected voltage value over the half period of the voltage rectification waveform of the alternating power supply to be used as a power supply driving the LED lamp. Accordingly, the LED lighting lamp is suitable for the alternating power supply and has the advantages of high efficiency and low energy consumption.
Description
Technical field
The present invention relates to a kind of LED lighting and supply unit thereof, relate in particular to a kind of applicable to AC power and possess high efficiency and the LED lighting and the supply unit thereof of low power consuming characteristics.
Background technology
In recent years, the environmental consciousness of energy-saving and carbon-saving is surging gradually, thereby the LED lighting apparatus of low power consuming high brightness gradually attracts attention, and exists the possibility that replaces conventional incandescent on market; Moreover because the progress of semiconductor process techniques in recent years makes the LED industry develop by leaps and bounds, its product quality is from viewpoints such as the kind of illuminant colour, brightness, persistence, luminous efficiencies, and its performance outmatches on the conventional incandescent; However, at present in office block, residential building, public building employed lighting still many based on incandescent lamp.
Generally speaking, above-mentioned lighting is to be connected directly to commercial ac power source (: 230V) carry out lighting use in Japan: 100V, the U.S.: 110V, Europe, yet, if adopt LED as lighting, must be driven with DC power supply, therefore must earlier described commercial ac power source be converted to DC power supply, but this will make that the cost of described LED lighting is high and bulky.In view of this, just have the dealer to attempt that the LED lighting is connected directly to commercial ac power source and used, related description is as follows.
Please refer to Figure 23, it is the circuit diagram of first traditional LED lighting, described LED lighting comprises: a bridge full-wave rectifier diode 2002, an AC input terminal 2003, another AC input terminal 2004, series connection resistance 2005, a constant current assembly 2006 and a LED light fixture 2007, LED light fixture 2007 is by 2～8 V
FFor the LED of 2V is in series, so the V of LED light fixture 2007
FBeing 4-16V, in addition, is under the situation of 100V at the voltage of the domestic commercial ac power source of Japan, and the crest voltage of the current waveform in full-wave rectifier of being exported by described bridge full-wave rectifier diode 2002 is about 140V.
In addition, at the V of the LED of described LED light fixture 2007
FUnder the situation for 2V, drive the I that described LED light fixture 2007 needs
FBe approximately 10mA, so the voltage that described series resistance 2005 and constant current assembly 2006 are born is 140V-2V=138V, therefore, there is 138V * 10mA=1.38W to be released, on the other hand, the luminous electric power that consumes is 2V * 10mA=0.02W, and its efficient is 0.02W/ (1.38W+0.02W)=0.014, so its luminous efficiency is 1.4%, that is there is nearly 99% heat to be released.
Please refer to Figure 24, it is the circuit diagram of second traditional LED lighting, described LED lighting comprises: a bridge full-wave rectifier diode 2002, one AC input terminal 2003, another AC input terminal 2004, one voltage regulator 2105 and a current-limiting resistance 2106, wherein, voltage regulator 2105 is the changes that are used for balance full-wave rectification AC waveform, therefore described LED lighting does not need to use constant current assembly 2006, yet, though it is luminous stable, but because its running is to build on the basis of the series connection of voltage conciliation, so electrical efficiency and first traditional LED lighting are low equally.
Summary of the invention
In view of the defective of above-mentioned traditional LED lighting, the invention provides a kind of LED lighting and supply unit thereof, to address the above problem.
It is a kind of applicable to AC power and possess high efficiency and the LED lighting and the supply unit thereof of low power consuming characteristics that main purpose of the present invention is to provide.
In order to reach the foregoing invention purpose, the present invention takes following technological means to be reached, and supply unit wherein of the present invention comprises:
Rectified waveform obtains device, is the voltage commutation waveform that is used to obtain AC power;
Power output apparatus is by obtaining electric power in the desired voltage values more than the voltage commutation waveform half period of AC power, to export as working power.
In addition, LED lighting of the present invention, comprise: supply unit portion and LED light fixture, it is characterized in that: described LED light fixture is the output that the LED by one or more series connection is constituted and be connected in described supply unit portion, described supply unit portion obtains the voltage shaping waveform of AC power, and by obtaining electric power in the desired voltage values more than the voltage commutation waveform half period of described AC power, with as driving described LED lamp power.
Therefore LED lighting of the present invention more can obtain the advantage of high efficiency and low power consuming, to improve the defective of traditional LED lighting not only applicable to AC power under the cooperation of supply unit of the present invention.
Description of drawings
Fig. 1 is the circuit diagram of first embodiment of the invention.
Fig. 2 is the voltage oscillogram of first embodiment of the invention.
Fig. 3 is the circuit diagram of second embodiment of the invention.
Fig. 4 is the voltage oscillogram of second embodiment of the invention.
Fig. 5 is the physical circuit structural map of second embodiment of the invention.
Fig. 6 is the circuit diagram of third embodiment of the invention.
Fig. 7 is the circuit diagram of fourth embodiment of the invention.
Fig. 8 is the voltage oscillogram of fourth embodiment of the invention.
Fig. 9 is the physical circuit structural map of fourth embodiment of the invention.
Figure 10 is the circuit diagram of fifth embodiment of the invention.
Figure 11 is the action specification figure of the switching capacity reduction voltage circuit of fifth embodiment of the invention.
Figure 12 is the physical circuit structural map of the switching capacity reduction voltage circuit of fifth embodiment of the invention.
Figure 13 is the circuit diagram of sixth embodiment of the invention.
Figure 14 is the physical circuit structural map of the switching capacity reduction voltage circuit of sixth embodiment of the invention.
Figure 15 is a LED lighting structural map of the present invention.
Figure 16 is another structural map of LED lighting of the present invention.
Figure 17 is a flexible PCB profile of the present invention.
Figure 18 is another embodiment profile of flexible PCB of the present invention.
Figure 19 is an embodiment profile again of flexible PCB of the present invention.
Figure 20 is the circuit diagram of seventh embodiment of the invention.
Figure 21 is the LED light fixture of the seventh embodiment of the present invention and the current-voltage correlation figure of voltage stabilizing didoe.
Figure 22 is the circuit diagram of eighth embodiment of the invention.
Figure 23 is the circuit diagram of first traditional LED lighting.
Figure 24 is the circuit diagram of second traditional LED lighting.
The primary clustering symbol description
102: the bridge full-wave rectifier diode
103: the constant voltage assembly
104: series resistance
105: the constant current assembly
The 106:LED light fixture
107: node A
108: the one AC input terminals
1081: Node B
109: the two AC input terminals
201: voltage waveform
202: voltage waveform
303: electric capacity
304: divider resistance
305: divider resistance
The 306:1VddH power line
307: current detection circuit
308: earth connection
309: the input voltage detection circuit of corresponding zero crossings
310: the vibration frequency eliminating circuit
311: position
312: position
313: position
The 314:2VddL power line
315: inductance
316: switch module
317: free-wheel diode
321: Node B
322: control switching circuit
401: voltage waveform
402: voltage waveform
502: integrated circuit
609: the input and output voltage testing circuit
620: electric capacity
621: series impedance
708: the resistance that the zero crossing countermeasure is used
711: position
The 712:ON/OFF control circuit
715: Node B
716: electric capacity
717: electric capacity
801: voltage waveform
802: voltage waveform
1011: oscillating circuit
1013: the frequency signal control circuit
1018: the switching capacity reduction voltage circuit
The 1018a:HV input terminal
The 1018b:HV lead-out terminal
The 1018c:LV lead-out terminal
1018d: frequency input terminal
1018e: anti-phase frequency input terminal
1018f: earth terminal
1021: position
1023: position
1025: resistance
1300: integrated circuit
1301: the switching capacity reduction voltage circuit
The 1301a:ACH input terminal
The 1301b:ACL input terminal
The 1301c:HV lead-out terminal
The 1301d:LV lead-out terminal
1302: the switching capacity reduction voltage circuit
The 1302a:ACH input terminal
The 1302b:ACL input terminal
The 1302c:HV lead-out terminal
The 1302d:LV lead-out terminal
1307: the diode that stops backward current
1308: the diode that stops backward current
1501: crown cap
1502: shell
1503: the illuminating lamp module
The 1503a:LED chip
1504: supply unit
1504a: full-wave rectification bridge-type diode
The 1504b:IC chip
1504c: inductance
1504d: circuit substrate
The 1504e:AC input lead
The 1504f:AC input lead
1504g: power supply lead wire
1504h: power supply lead wire
1601: flexible PCB
The 1604a:AC input terminal
The 1604b:AC input terminal
1604c: power supply terminal
1604d: power supply terminal
2001: voltage stabilizing didoe
2002: the bridge full-wave rectifier diode
The 2003:AC input terminal
The 2004:AC input terminal
2005: series resistance
2006: the constant current assembly
The 2007:LED light fixture
2105: voltage regulator
2106: current-limiting resistance
Embodiment
Referring to Fig. 1, it is the circuit diagram of first embodiment of LED lighting of the present invention and supply unit thereof, and described LED lighting and supply unit thereof comprise: a plurality of bridge full-wave rectifier diodes (BrD1) 102, certain voltage assembly 103, a series connection resistance 104, a constant current assembly (CRD; Current Regulated Diode) 105, one LED light fixture 106, one the one AC input terminal 108, one the 2nd AC input terminal 109, a node A 107 and a Node B 1081, wherein, constant voltage assembly 103 is voltage stabilizing didoe (D
z1), an AC input terminal 108 is connected in alternating current fire wire (HOTLINE), and 109 of the 2nd AC input terminals are connected in alternating current zero line (COOL LINE), and ac input voltage is 100V.
The anode of LED light fixture 106 is connected to the cathode output end of bridge full-wave rectifier diode 102 by constant current assembly 105, series resistance 104 and constant voltage assembly 103, and the negative electrode of LED light fixture 106 then is connected to the cathode output end of bridge full-wave rectifier diode 102.
In addition, LED light fixture 106 is to be in series by a LED or by a plurality of LED, and the supply unit of described LED lighting is to be made of the circuit part's branch beyond the LED light fixture 106.
Referring to Fig. 2, it is the node A (107) among Fig. 1 and the voltage oscillogram of Node B (1081), wherein the longitudinal axis is represented voltage (V), transverse axis express time (t), voltage waveform 201 is the voltage waveform of node A107, voltage waveform 202 is the voltage waveform of Node B 1081, and the about 140V of the peak value of ac input voltage, the voltage of described constant voltage assembly 103 are 100V.
Simultaneously referring to Fig. 1 and Fig. 2, described bridge full-wave rectifier diode 102 carries out full-wave rectification with the ac input voltage of 100V, and when 100Hz current waveform in full-wave rectifier during greater than 100V, constant voltage assembly 103 is just lighted LED light fixture 106, ratio during the light on and off of this moment distributes, just the work period of the ON/OFF of LED light fixture 106 is 6: 4, makes the electric power high efficiency of LED light fixture 106 in the luminous scope of not feeling to glimmer.
In addition, the voltage of LED light fixture 106, constant current assembly 105 and series resistance 104 only surpasses the about 40V of voltage of constant voltage assembly 103, and by pass through the action that electric current carry out constant currentization of constant current assembly 105 at LED light fixture 106.
Referring to Fig. 3, it is the circuit diagram of LED lighting of the present invention and supply unit second embodiment thereof, described LED lighting and supply unit thereof comprise: electric capacity 303, two divider resistances 304,305,1VddH power line 306, current detection circuit 307, earth connection 308, the input voltage detection circuit 309 of corresponding zero crossings, vibration frequency eliminating circuit 310, three lines of action 311,312,313,2VDDL power line 314, inductance 315, the switch module of making by N channel-style MOSFET 316, free-wheel diode 317, control switching circuit 322, node A 107 and Node B 321, in addition, identical symbol and the identical assembly of label representative among Fig. 1 and Fig. 3.
Wherein, two divider resistances 304,305 are connected in series, thereby the output voltage of bridge full-wave rectifier diode 102 is carried out dividing potential drop, so its dividing point is connected to the input of the input voltage detection circuit 309 of corresponding zero crossings, the working power input and the 2VDDL power line 314 of vibration frequency eliminating circuit 310,303 of electric capacity are connected between same dividing point and the ground connection.
In addition, LED light fixture 106 is to be in series by 2～8 LED in the present embodiment, and LED light fixture 106, inductance 315 and switch module 316 are connected in series and are inserted between 1VDDH power line 306 and the earth connection 308; 307 of current detection circuits are inserted between two sections 1VDDH power lines 306; Free-wheel diode 317 is connected in parallel to the series circuit of LED light fixture 106 and inductance 315.
In addition, control switching circuit 322 is accepted working power and from the input voltage detection circuit 309 of current detection circuit 307, corresponding zero crossings and vibration frequency eliminating circuit 310 acknowledge(ment) signals, to control ON, OFF as described later from 2VDDL power line 314.
Referring to Fig. 4, it is the voltage oscillogram of node A 107 shown in Fig. 3 and Node B 321, wherein the longitudinal axis is represented voltage (V), transverse axis express time (t), voltage waveform 401 is the voltage waveform of node A 107, voltage waveform 402 is the voltage waveform of Node B 321, the about 140V of the peak value of ac input voltage.
Simultaneously referring to Fig. 3 and Fig. 4, when the input voltage of node A 107 when 0V rises to 40V, control switching circuit 322 is started working, and when voltage dropped to 40V, control switching circuit 322 just quit work; And the dividing point voltage of two divider resistances 304,305 is 5V, so the ON voltage during control switching circuit 322 action, also is 5V.
Bridge full-wave rectifier diode 102 carries out full-wave rectification with the ac input voltage of 100V, and when current waveform in full-wave rectifier during greater than 40V, make switch module 316 control ON, the OFF state of LED light fixtures 106 by control switching circuit 322, that is to say, the ON of switch module 316, OFF frequency are ON, the OFF frequency of LED light fixture 106, described frequency is 40KHz, makes the electric power high efficiency of LED light fixture 106 in the luminous scope of not feeling to glimmer by this.
In addition, control switching circuit 322 is at the action that electric current carries out constant currentization of passing through of LED light fixture 106, so even constituting the LED quantity of LED light fixture 106 changes to some extent, its electric current that passes through also can be because of constant currentization and identical.Electric capacity 303 carries out the action of voltage dividing potential drop via two divider resistances 304,305, and because voltage is no more than 5V, therefore can solve the problem of anti-low pressure, and supply with owing to can finish the power supply of input voltage detection circuit 309, vibration frequency eliminating circuit 310 and the control switching circuit 322 of corresponding zero crossings, so also can solve the problem of low capacity.
Yet above-mentioned " constant current " refers to the constant current of average current, in the present embodiment, is to use oscillating circuit to switch, and is example as if the electric current with constant 10mA, if peak current is 30mA, the work period with 30% drives, and on average is 10mA; With regard to the luminous purposes that is used for LED, this is comparatively desirable type of drive, because the current brightness characteristic of LED with respect to the brightness that people experienced, is superlinearity (super linear) rather than linear (linear).
For example, be that the brightness of LED is 2 under 2 times the situation at electric current
nDoubly, this is because people's eyes finding, still residual the brightness of peak value, so if the peak current of driving LED is set at DC electric current height (this is called pulsed drive) than identical average current, it is comparatively bright that people then can feel, so just can obtain the brightness of same perceived under the situation of using less electric power.Yet, described pulsed drive must be more than the 100Hz, use the situation of avoiding the LED flicker, so in the 3rd and the 5th embodiment with oscillating circuit described later, also similarly effective, in the 4th and the 6th embodiment, though the dead-beat circuit, but as long as with 100Hz with on come work, then still same effectively.
At this, constitute the 2Vdd power supply and will import the work input voltage V of cutting edge of a knife or a sword threshold voltage 140V with electric resistance partial pressure
DETSet 40V for, yet, for so input, because with V
DETBe set at more than 10%, thus can make the ON/OFF ratio of switch regulator terrifically little, thereby can guarantee the tolerance limit on the circuit design like a cork.
On the other hand, if improve V during switching frequency especially
DET, as AC frequency 100Hz, then can cause LED flicker to occur, thus when the AC frequency when 50Hz is following, naked eyes can be felt this flicker; In the case, by the input voltage V that will work
DETBe decreased to 3～40V,, also must do not worry to have scintillation fully and take place even then the AC frequency is below 50Hz.
Referring to Fig. 5, it is the physical circuit structural map of second embodiment of the invention, described LED lighting and supply unit thereof more comprise: an integrated circuit 502, the switch module 316 of integrated circuit 502 can be the structure beyond the integrated circuit 502, in addition, identical symbol and the identical assembly of label representative among Fig. 5 and Fig. 3.
Referring to Fig. 6, it is the circuit diagram of the 3rd embodiment of LED lighting of the present invention and supply unit thereof, described LED lighting and supply unit thereof comprise: input and output voltage testing circuit 609, electric capacity 620 and series impedance 621, in addition, identical symbol and the identical assembly of label representative among Fig. 6 and Fig. 3, but switch module 316 is made by PNP transistor.
Input and output voltage testing circuit 609 detects output voltage, and with the detected value of the detected value of output voltage and input voltage pass to control switching circuit 322, with as an amplitude limiter (Limiter), and control control switching circuit 322 as the Switching power of Voltage Feedback type.
That is to say, input and output voltage testing circuit 609 is to keep stable output voltage regulator as the output voltage with LED light fixture 106, when output voltage is that 16V and LED light fixture 106 is during for 2V, if load surpasses 10mA, then output voltage becomes 2V, in other words, input and output voltage testing circuit 609 during between 2V～16V, carries out the constant current action of 10mA at output voltage.Moreover switch module 316 also can be N channel-style MOSFET or positive-negative-positive MOSFET.
Referring to Fig. 7, it is the circuit diagram of the 4th embodiment of LED lighting of the present invention and supply unit thereof, described LED lighting and supply unit thereof comprise: zero crossing countermeasure resistance 708, position 711, ON/OFF control circuit 712, electric capacity 716,717 and Node B 715, in addition, identical symbol and the identical assembly of label representative among Fig. 7 and Fig. 6.
Yet, electric capacity 716 and switch module 316 can reach the function of output voltage smoothing, electric capacity 717 and series resistance constitute charge-discharge circuit jointly, and LED light fixture 106 is to be connected in series and to form to hundreds of LED by 2 in the present embodiment, and ON/OFF control circuit 712 from input and output voltage testing circuit 609 acknowledge(ment) signals with control switch assembly 316.
That is to say, in the present embodiment, in order to reduce current sinking naturally, thereby the OFF time of prolongation switch module 316, at this moment, power supply is supplied with electric capacity 716,717 and is lighted LED light fixture 106, and in the setting of ON/OFF control circuit 712, the ON of switch module 316, OFF voltage can be set at ON voltage 30V, OFF voltage 16V, so switch module 316 can adopt withstand voltage little transistor.
Referring to Fig. 8, it is the node A 107 among Fig. 7 and the voltage oscillogram of Node B 715, wherein the longitudinal axis is represented voltage (V), transverse axis express time (t), voltage waveform 801 is the voltage waveform of node A 107, voltage waveform 802 is the voltage waveform of Node B 715, the about 140V of the peak value of ac input voltage.
Simultaneously referring to Fig. 7 to Fig. 9, Fig. 9 is the physical circuit structural map of fourth embodiment of the invention, and identical symbol and the identical assembly of label representative among Fig. 9 and Fig. 7, wherein, on ON/OFF control circuit 712, the about 140V of the peak value of ac input voltage, when input voltage (voltage of node A 107) when 0V rises to 30V, switch module 316 is ON, when input voltage surpasses 30V, switch module 316 is ON, then, Node B 715 voltages drop to 16V, and switch module 316 is OFF, drop to 16V again when following, then switch module 316 is ON once again.
That is to say, in the present embodiment, bridge full-wave rectifier diode 102 carries out full-wave rectification with ac input voltage, by ON/OFF control circuit 712, below current waveform in full-wave rectifier is in 30V and output voltage when dropping to 16V, switch module 316 is the ON state, afterwards, as current waveform in full-wave rectifier arrival 30V, power supply was supplied to electric capacity at 716,717 o'clock, and LED light fixture 106 is promptly lighted under the situation of low power loss continuously.
Moreover, the running of ON/OFF control circuit 712 and running stop voltage and can at random be set in and light the required minimum voltage of LED light fixture 106, and, supplying electric current to LED light fixture 106 also can pass through series resistance 621 and electric capacity 716,717 and setting arbitrarily, can be up to 100 so constitute the LED series connection number of LED light fixture 106.
Referring to Figure 10, it is the 5th embodiment circuit diagram of LED lighting of the present invention and supply unit thereof, described LED lighting and supply unit thereof comprise: oscillating circuit 1011, frequency signal control circuit 1013, switching capacity reduction voltage circuit 1018, position 1021,1023 and propagation resistance 1025, in addition, Figure 10 and Fig. 1, symbol and label identical among Fig. 6 and Fig. 9 are represented identical assembly, in this embodiment, the power supply of LED light fixture 106 is supplied with ON, OFF control, actions such as voltage step-down function and constant current control are carried out by switching capacity reduction voltage circuit 1018.
Switching capacity reduction voltage circuit 1018 is accepted to export from the positive pole of the bridge full-wave rectifier diode 102 of constant current assembly 105 from the signal of frequency signal control circuit 1013 and current detection circuit 307 and then control, uses and lights LED light fixture 106.
Switching capacity reduction voltage circuit 1018 comprises: HV input terminal 1018a, HV lead-out terminal 1018b, LV lead-out terminal 1018c, frequency input terminal 1018d, anti-phase frequency input terminal 1018e and earth terminal 1018f; Wherein, HV input terminal 1018a is connected on the cathode output end by constant current assembly 105, HV lead-out terminal 1018b is connected in the anode of LED light fixture 106, LV lead-out terminal 1018c then is connected in the negative electrode of LED light fixture 106 by current detection circuit 307, and, frequency input terminal 1018d and anti-phase frequency input terminal 1018e are connected to respectively on the frequency input terminal and anti-phase frequency output terminal of frequency signal control circuit 1013, at last, earth terminal 1018f then is connected on the earth connection 308.
Moreover, oscillating circuit 1011 will be exported after the voltage dividing potential drop by two divider resistances 304,305, and then export default oscillator signal to position 1023,1013 acceptance of frequency signal control circuit are from the electric current of position 1021,1023 and oscillator signal and will be sent to switching capacity reduction voltage circuit 1018 according to the frequency signal that the current detection signal value is regulated and control, in addition, propagation resistance 1025 is parallel capacitances connected in parallel to LED light fixture 106, and LED light fixture 106 is made of 2～8 LED coupled in series.
Referring to Figure 11, it is the action specification figure of switching capacity reduction voltage circuit 1018, wherein, and SW
1～SW
2nBe switch, CPT
1～CPTn is an electric capacity, and in addition, HV input terminal 1018a, HV lead-out terminal 1018b, LV lead-out terminal 1018c, frequency input terminal 1018d, anti-phase frequency input terminal 1018e and earth terminal 1018f are then identical with Figure 10.
Wherein, frequency input terminal 1018d has imported each switch SW
1～SW
2nSwitch to the frequency signal of state 1, and anti-phase frequency input terminal 1018e has imported with each switch SW
1～SW
2nSwitch to the frequency signal of state 2.
During state 1, capacitor C PT
1～CPT
nBe connected in series and be arranged at switch SW between HV input terminal 1018a and the earth terminal 1018f
1～SW
2nOn; During state 2, capacitor C PT
1～CPT
nBe connected in parallel and be arranged at switch SW between HV lead-out terminal 1018b and the LV lead-out terminal 1018c
1～SW
2nOn.Switch SW
1～SW
2nBe connected with HV input terminal 1018a, HV lead-out terminal 1018b, LV lead-out terminal 1018c and earth terminal 1018f in addition.
Simultaneously referring to Figure 10 and Figure 11, during state 1, the capacitor C PT that is connected in series
1～CPT
n1018a is connected to 1VddH power line 306 by the HV input terminal, to light LED light fixture 106; During state 2, the capacitor C PT that is connected in parallel
1～CPTn is connected to the anode of LED light fixture 106 by HV lead-out terminal 1018b, to light LED light fixture 106.
So in state 1 and state 2, by frequency signal that inputs to frequency input terminal 1018d and the anti-phase frequency signal that inputs to anti-phase frequency input terminal 1018e, switch SW
1～SW
2nBy with frequency preset switching controls alternately repeatedly, so described capacitor C PT1～CPTn is is just repeatedly discharged and recharged action to light LED light fixture 106 with frequency preset.
The ON of LED light fixture 106, OFF frequency as 40KHz, reach luminous and electric power high efficiency in the scope not feeling to glimmer by frequency signal control circuit 1013.
Frequency signal control circuit 1013 accepts to set from the signal of current detection circuit 307 frequency signal and the anti-phase frequency signal of correct frequency, and the output voltage of switching capacity reduction voltage circuit 1018 is with capacitor C PT
1～CPT
nCapacitance set.
So by switching capacity reduction voltage circuit 1018, do not need to use transformer or inductance 315, also do not need to use high resistance to pressure switch module, just the voltage drop of source power supply can be low to moderate the low-voltage that is fit to LED light fixture 106, that is to say that the voltage regulator of controlling with Voltage Feedback just can reach the miniaturization of AC adapter power supply, the effect of cost degradation.
Referring to Figure 12, it is the physical circuit structural map of switching capacity reduction voltage circuit 1018, wherein, and NMOS
1～NMOS
3n-1MOSFET for each N type passage, in addition, identical symbol and the identical assembly of label representative among Figure 12 and Figure 11, described switching capacity reduction voltage circuit is applicable to monolithic semiconductor integrated circuit, so series capacitance that can be by greater number and to reduce the withstand voltage thickness of insulating barrier that makes of electric capacity thinner can be dwindled its area thus.
Referring to Figure 13, it is the circuit diagram of LED lighting of the present invention and supply unit the 6th embodiment thereof, described LED lighting and supply unit thereof comprise: constant current assembly 105, LED light fixture 106 by 2～8 LED series connection, the one AC input terminal 108, the 2nd AC input terminal 109, printed resistor 1025, integrated circuit 1300, switching capacity reduction voltage circuit 1301,1302 and the diode 1307 that stops backward current, 1308, wherein, ac input voltage is 100V, the one AC input terminal 108 is connected in alternating current fire wire, and the 2nd AC input terminal 109 is connected in the alternating current zero line.
Switching capacity reduction voltage circuit 1301,1302 is obtained the AC input and direct current is exported DC by an AC input terminal 108 and the 2nd AC input terminal 109
OUTGive LED light fixture 106 and it is lighted.
Switching capacity reduction voltage circuit 1301,1302 comprises: ACH input terminal 1301a, 1302a, ACL input terminal 1301b, 1302b, HV lead-out terminal 1301c, 1302c and LV lead-out terminal 1301d, 1302d; ACH input terminal 1301a, 1302a and ACL input terminal 1301b, 1302b are interconnection, that is to say, ACH input terminal 1301a and ACL input terminal 1302b are connected to an AC input terminal 108, and ACH input terminal 1301b and ACL input terminal 1302a are connected to the 2nd AC input terminal 107.
On the other hand, the HV lead-out terminal 1301c of switching capacity reduction voltage circuit 1301 is connected to the anode of LED light fixture 106 by the diode 1307 that stops backward current; The HV lead-out terminal 1302c of switching capacity reduction voltage circuit 1302 also is connected to the anode of LED light fixture 106 by the diode 1308 that stops backward current.
The LV lead-out terminal 1302d of the LV lead-out terminal 1301d of switching capacity reduction voltage circuit 1301 and switching capacity reduction voltage circuit 1302 is connected and by above-mentioned constant current assembly, is connected to the negative electrode of LED light fixture 106; One end of printed resistor 1025 then is connected in parallel to LED light fixture 106 by above-mentioned constant current assembly, and LED light fixture 106 is in series by 2～8 LED.
Referring to Figure 14, it is the physical circuit structural map of switching capacity reduction voltage circuit 1301,1302, wherein, and PMOS
1～PMOS
2nBe P channel-style MOSFET, CPT
1～CPT
2nBe electric capacity, Di
R1～Di
Rn+1Be rectifier diode, in addition, identical symbol and the identical assembly of label representative among Figure 14 and Figure 13.
Wherein, P channel-style MOSFET PMOS
1～PMOS
2nPositive voltage is OFF on each grid, and negative voltage is ON, capacitor C PT
1～CPT
2nBe arranged between ACH input terminal 1301a, 1302a and ACL input terminal 1301b, the 1302b and be connected in series in the positive pole of AC input; Capacitor C PT
1～CPT
2nAlso be arranged at the P channel-style MOSFET PMOS between HV lead-out terminal 1301c, 1302c and LV lead-out terminal 1301d, the 1302d
1～PMOS
2nGo up and be connected in parallel in the negative pole of AC input;
Referring to Figure 13 and Figure 14, switching capacity reduction voltage circuit 1301,1302 is on the positive pole of AC input, by the described capacitor C PT that is connected in series simultaneously
1～CPT
nSee through ACH input terminal 1301a and be connected on the AC input terminal 108, and then switch on to ACL input terminal 1301b and to be recharged separately.
In addition, on the negative pole of AC input, the described capacitor C PT that is connected in parallel
1～CPT
nBe connected to the anode of LED light fixture 106 by HV input terminal 1301c and backward diode 1307, and, light LED light fixture 106 by the alternating current of 50Hz again to LV lead-out terminal 1301d release current; Moreover switching capacity reduction voltage circuit 1302 is spent with the phasic difference mutually 90 of switching capacity reduction voltage circuit 1301 on the positive and negative electrode of AC input, and lights LED light fixture 106 with the alternating current of 50Hz; Therefore, the alternating current that LED light fixture 106 can 100Hz is lighted and is made luminous and reach electric power high efficiency in the scope of not feeling to glimmer.
Switching capacity reduction voltage circuit 1301,1302 is because described P channel-style MOSFET PMOS
1～PMOS
2nON, OFF switch, so do not need control impuls, and the output voltage of switching capacity reduction voltage circuit 1301,1302 is according to capacitor C PT
1～CPT
nCapacitance suitably set.
So the structure according to switching capacity reduction voltage circuit 1301,1302 does not need to use transformer or inductance, does not also need to use high resistance to pressure changeover module, the low-voltage that just voltage drop of source power supply can be low to moderate suitable LED light fixture 106 is to light LED light fixture 106.
In addition, in the present embodiment, do not need to use the bridge full-wave rectifier diode, that is to say, therefore present embodiment working voltage FEEDBACK CONTROL but not the voltage regulator of Current Feedback Control can reach the miniaturization and the cost degradation of AC adapter power supply; Yet in the present embodiment, constant current assembly 105 also can be located at the anode-side of LED light fixture 106, and can save backward current prevention diode 1307,1308, and can constitute printed resistor 1025 and constant current assembly 105 outside integrated circuit 1300.
Referring to Figure 15, it is for the structural map of LED lighting of the present invention, wherein, (a) be that front elevation, (b) are the D-D profile in (c) for back view, (c) for right hand view, (d), described LED lighting comprises: E-10 type crown cap 1501, the synthetic resin that is connected to crown cap 1501 or glass shell 1502 and the illuminating lamp module 1503 that is covered in shell 1502 front end faces.
Illuminating lamp module 1503 is provided with 8 concentric circless of equidistant setting, and each concentric circles is provided with a led chip 1503a, and each led chip 1503a is connected on the output of a supply unit 1504.Supply unit 1504 comprises: full-wave rectification bridge-type diode 1504a, IC chip 1504b, inductance 1504c, circuit substrate 1504d, AC input lead 1504e, 1504f and power supply lead wire 1504g, 1504h.
If described LED lighting is inserted commercial ac power source input runners with crown cap 1501, described commercial ac power source is supplied to supply unit 1504 by AC input lead 1504e, 1504f lights and luminous lighting the led chip 1503a of illuminating lamp module 1503 simultaneously.
Referring to Figure 16, it is another structural map of LED lighting, described LED lighting comprises flexible PCB 1601, AC input terminal 1604a, 1604b and power supply terminal 1604c, 1604d, wherein, and identical symbol and the identical assembly of label representative among Figure 16 and Figure 15.In addition, Figure 17 is the profile along I-I line, II-II line, III-III line of flexible PCB 1601.
Referring to Figure 16 and Figure 17, it adopts flexible PCB 1601 simultaneously, it can be bent to S word shape or Z word shape to save space and wire jumper.
In addition, Figure 18 is the profile along I-I line, II-II line, III-III line of flexible PCB 1601 another embodiment; Figure 19 is flexible PCB 1601 profile along I-I line, II-II line, III-III line of an embodiment again.
Referring to Figure 15 to Figure 19, power supply terminal 1604c, 1604d are arranged at illuminating lamp module 1503 sides and are arranged at the both sides of flexible PCB 1601 respectively, and AC input terminal 1604a, 1604b are arranged at the medial and lateral of flexible PCB 1601 respectively.Like this, can extend the distance of AC input terminal 1604a, 1604b and power supply terminal 1604c, 1604d to guarantee insulating properties.
Referring to Figure 20, it is the circuit diagram of LED lighting of the present invention and supply unit the 7th embodiment thereof, and described LED lighting and supply unit thereof comprise: an AC input terminal 108, the 2nd AC input terminal 109, be arranged at bridge rectifier diode 102 between an AC input terminal 108 and the 2nd AC input terminal 109, be connected in the constant current assembly 105 of bridge rectifier diode 102, the voltage stabilizing didoe 2001 that is series at the LED light fixture 106 of constant current assembly 105 and is parallel to LED light fixture 106.
Simultaneously referring to Figure 20 and Figure 21; Figure 21 is the LED light fixture 106 of seventh embodiment of the invention and the current-voltage correlation figure of voltage stabilizing didoe 2001; in the present embodiment; when the voltage that is applied to LED light fixture 106 does not reach predeterminated voltage VF; because it is bright with the dim spot that prevents LED light fixture 106 that electric current flow to voltage stabilizing didoe 2001; and in case when excessive electric current flow to LED light fixture 106, voltage stabilizing didoe 2001 can be shared described super-high-current and protect LED light fixture 106.
That is to say, in the region S of Figure 21, the forward drop-out voltage VF of voltage ratio LED light fixture 106 is little, so LED light fixture 106 can not lighted, even but the switch of an AC input terminal 108 and the 2nd AC input terminal 107 cuts out, also can have an appointment the electric current of 100 to 500 μ A because of high impedance flow in the circuit, make that in region S the electric current of voltage stabilizing didoe 2001 does not flow to LED light fixture 106 and can prevent that dim spot is bright; On the other hand, when electric current was 10mA, the forward drop-out voltage VF of LED light fixture 106 can surpass voltage range W and LED light fixture 106 is lighted; Moreover,, electric current becomes super-high-current in case overruning W, and then voltage stabilizing didoe 2001 can be shared described super-high-current and protect LED light fixture 106.
In addition; the voltage of voltage regulation of voltage stabilizing didoe 2001 must surpass LED light fixture 106 forward drop-out voltage VF 10%; also must be lower than LED light fixture 106 forward drop-out voltage VF 30%; if can't prevent effectively that less than 10% dim spot is bright, if protect LED light fixture 106 greater than 30% can't be shared super-high-current fully.
Referring to Figure 22, it is the circuit diagram of LED lighting of the present invention and supply unit the 8th embodiment thereof, described LED lighting and supply unit thereof comprise: a plurality of mutual LED coupled in series light fixtures 106, be connected in parallel to the voltage stabilizing didoe 2001 and the constant current assembly 105 of each LED light fixture 106, in this embodiment, even arbitrary LED light fixture 106 is cut off and is secretly gone out, also because there is constant current assembly 105 when electric current is flowed through the voltage stabilizing didoe 2001 that is parallel to LED light fixture 106, to make voltage stabilizing didoe 2001 puncture (breakdown), thereby can keep the illuminating state of remaining LED light fixture 106.
Claims (32)
1, a kind of supply unit is characterized in that comprising:
Rectified waveform obtains device, is the voltage commutation waveform that is used to obtain AC power;
Power output apparatus is to obtain electric power in the desired voltage values more than the voltage commutation waveform half period of AC power, to export as working power.
2, a kind of supply unit, it is characterized in that comprising: bridge rectifier diode, oscillating circuit, frequency signal control circuit and switching capacity reduction voltage circuit, described switching capacity reduction voltage circuit comprises: a plurality of diverter switches that are connected in series and be arranged at electric capacity between the described diverter switch, each diverter switch is by described frequency signal control circuit, on position on one side to the electric capacity charging and on the position of another side from capacitor discharge, and then the action that described diverter switch can be switched on two positions.
3, a kind of supply unit is characterized in that comprising: oscillating circuit, frequency signal control circuit and two switching capacity reduction voltage circuits; The high-voltage side input terminal on one switching capacity reduction voltage circuit one side and the low voltage side input terminal of another side are connected on the supply unit input terminal on one side; The low voltage side input terminal on another switching capacity reduction voltage circuit one side and the high-voltage side input terminal of another side are connected on the input terminal of described supply unit another side.
4, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, described supply unit obtains the voltage shaping waveform of AC power, and obtain electric power in the desired voltage values more than the voltage commutation waveform half period of described AC power, with power supply as the described LED light fixture of driving.
5, LED lighting as claimed in claim 4, it is characterized in that: described supply unit is series at bridge rectifier diode and as the voltage stabilizing didoe of low-voltage assembly, described bridge rectifier diode is with after the input voltage rectification, and described voltage stabilizing didoe promptly obtains electric power to light described LED lighting more than a predeterminated voltage value.
6, LED lighting as claimed in claim 4, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
7, LED lighting as claimed in claim 6, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
8, LED lighting as claimed in claim 7, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
9, a kind of LED lighting is characterized in that comprising: supply unit, LED light fixture and voltage stabilizing didoe; Described LED light fixture constitutes and is connected in the output of described supply unit by the LED of one or more series connection, and described LED light fixture is a plurality of and is connected in parallel with described voltage stabilizing didoe.
10, LED lighting as claimed in claim 9 is characterized in that, further comprises the output that is connected in series in described supply unit and the constant current assembly of described LED light fixture.
11, LED lighting as claimed in claim 10 is characterized in that: the voltage of voltage regulation of described voltage stabilizing didoe exceed described LED light fixture forward drop-out voltage 10%, and less than 30% of the forward drop-out voltage of described LED light fixture.
12, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, described supply unit further comprises: current detection circuit, input voltage test section, oscillating circuit, switching circuit and switch module, described switching circuit is accepted the signal from described current detection circuit and described input voltage test section, uses ON, the OFF state of the described switch module of control.
13, LED lighting as claimed in claim 12, it is characterized in that: described supply unit obtains the voltage shaping waveform of AC power, and obtain electric power in the desired voltage values more than the voltage commutation waveform half period of described AC power, with power supply as the described LED light fixture of driving.
14, LED lighting as claimed in claim 13, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
15, LED lighting as claimed in claim 14, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
16, LED lighting as claimed in claim 15, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
17, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, described supply unit further comprises: input and output voltage test section, oscillating circuit, ON-OFF control circuit, switch module and current detection circuit, described ON-OFF control circuit is accepted the signal from described input and output voltage test section and described current detection circuit, uses ON, the OFF state of the described switch module of control.
18, LED lighting as claimed in claim 17, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
19, LED lighting as claimed in claim 18, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
20, LED lighting as claimed in claim 19, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
21, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, described supply unit is further and comprise: the rectifying bridge type rectifier, current detection circuit, the input voltage test section, oscillating circuit, switching circuit and switch module, described switching circuit is accepted the signal from described current detection circuit and the detection of described input voltage, use the ON of the described switch module of control, the OFF state, and between described switch module and described LED light fixture, be provided with electric capacity, when opening, described switch module will charge to described electric capacity, and will be when described switch module is closed from described electric capacity supply capability to described LED light fixture.
22, LED lighting as claimed in claim 21, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
23, LED lighting as claimed in claim 22, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
24, LED lighting as claimed in claim 23, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
25, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, moreover, described supply unit further comprises: bridge rectifier diode, oscillating circuit, frequency signal control circuit and switching capacity reduction voltage circuit, wherein, described switching capacity reduction voltage circuit further comprises: a plurality of diverter switches that are connected in series and be arranged at electric capacity between the described diverter switch, described each diverter switch is by described frequency signal control circuit, on position on one side to the electric capacity charging and on the position of another side from capacitor discharge driving described LED light fixture, and then the action that described diverter switch can be switched on two positions.
26, LED lighting as claimed in claim 25, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
27, LED lighting as claimed in claim 26, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
28, LED lighting as claimed in claim 27, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
29, a kind of LED lighting, it is characterized in that comprising: supply unit and LED light fixture, described LED light fixture is constituted and is connected in the output of described supply unit by the LED of one or more series connection, described supply unit further comprises: oscillating circuit, frequency signal control circuit, current detection circuit and two switching capacity reduction voltage circuits, wherein, the low voltage side input terminal of the high-voltage side input terminal on switching capacity reduction voltage circuit one side and another side is connected on the described supply unit input terminal on one side; The low voltage side input terminal on another switching capacity reduction voltage circuit one side and the high-voltage side input terminal of another side are connected on the input terminal of described supply unit another side.
30, LED lighting as claimed in claim 29, it is characterized in that: described supply unit is arranged on the flexible PCB, and is the S font.
31, LED lighting as claimed in claim 30, it is characterized in that: described supply unit is provided with terminal, and, being arranged on the top layer of described flexible PCB with one side of AC input terminal, another side then is arranged on the nexine of described flexible PCB.
32, LED lighting as claimed in claim 31, it is characterized in that: described supply unit sends the pulse current that peak value is higher than average value current, and the frequency of described pulse current is more than the 100Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910203466A CN101630920A (en) | 2009-05-21 | 2009-05-21 | LED lighting lamp and power supply device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910203466A CN101630920A (en) | 2009-05-21 | 2009-05-21 | LED lighting lamp and power supply device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101630920A true CN101630920A (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910203466A Pending CN101630920A (en) | 2009-05-21 | 2009-05-21 | LED lighting lamp and power supply device thereof |
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| Country | Link |
|---|---|
| CN (1) | CN101630920A (en) |
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| CN101861015A (en) * | 2010-04-30 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | LED light bar protective circuit |
| CN101917810A (en) * | 2010-09-03 | 2010-12-15 | 贵阳世纪天元科技有限公司 | LED (Light Emitting Diode) lighting method and device in AC power supply mode |
| CN102244955A (en) * | 2010-05-14 | 2011-11-16 | 皇家飞利浦电子股份有限公司 | Adaptive circuit |
| CN102386756A (en) * | 2011-11-20 | 2012-03-21 | 任永斌 | Power frequency switching power supply |
| CN102573243A (en) * | 2012-02-27 | 2012-07-11 | 杭州鸿德照明科技有限公司 | Light-emitting diode (LED) driving circuit for controlled silicon regulating circuit |
| CN102695340A (en) * | 2012-05-25 | 2012-09-26 | 江苏三显照明科技有限公司 | LED drive power supply with power saver |
| CN102905416A (en) * | 2011-10-17 | 2013-01-30 | 凹凸电子（武汉）有限公司 | Light source driving circuit and driving method |
| CN102984851A (en) * | 2012-09-29 | 2013-03-20 | 福州凡普科技有限公司 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
| WO2014121553A1 (en) * | 2013-02-07 | 2014-08-14 | Wu Huai | Led alternating-current drive device with high-power factor |
| CN104519644A (en) * | 2014-10-29 | 2015-04-15 | 杰华特微电子（杭州）有限公司 | Load voltage detecting circuit and corresponding load voltage detecting method |
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| CN101861015A (en) * | 2010-04-30 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | LED light bar protective circuit |
| CN102244955A (en) * | 2010-05-14 | 2011-11-16 | 皇家飞利浦电子股份有限公司 | Adaptive circuit |
| CN102244955B (en) * | 2010-05-14 | 2015-12-30 | 皇家飞利浦电子股份有限公司 | Adaptive circuit |
| CN101917810A (en) * | 2010-09-03 | 2010-12-15 | 贵阳世纪天元科技有限公司 | LED (Light Emitting Diode) lighting method and device in AC power supply mode |
| CN102905416B (en) * | 2011-10-17 | 2014-02-12 | 凹凸电子（武汉）有限公司 | Light source driving circuit and driving method |
| CN102905416A (en) * | 2011-10-17 | 2013-01-30 | 凹凸电子（武汉）有限公司 | Light source driving circuit and driving method |
| CN102386756A (en) * | 2011-11-20 | 2012-03-21 | 任永斌 | Power frequency switching power supply |
| CN102573243A (en) * | 2012-02-27 | 2012-07-11 | 杭州鸿德照明科技有限公司 | Light-emitting diode (LED) driving circuit for controlled silicon regulating circuit |
| CN102695340B (en) * | 2012-05-25 | 2014-03-12 | 江苏三显照明科技有限公司 | LED drive power supply with power saver |
| CN102695340A (en) * | 2012-05-25 | 2012-09-26 | 江苏三显照明科技有限公司 | LED drive power supply with power saver |
| CN102984851A (en) * | 2012-09-29 | 2013-03-20 | 福州凡普科技有限公司 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
| CN102984851B (en) * | 2012-09-29 | 2015-04-15 | 福州凡普科技有限公司 | Light-emitting diode (LED) pulsation driving frequency improving circuit |
| WO2014121553A1 (en) * | 2013-02-07 | 2014-08-14 | Wu Huai | Led alternating-current drive device with high-power factor |
| CN107211508A (en) * | 2014-10-14 | 2017-09-26 | 首尔半导体株式会社 | The LED drive circuit that scintillation properties are improved and the LED light device including this |
| CN107211508B (en) * | 2014-10-14 | 2019-11-05 | 首尔半导体株式会社 | The LED drive circuit that scintillation properties are improved and the LED light device including this |
| CN104519644A (en) * | 2014-10-29 | 2015-04-15 | 杰华特微电子（杭州）有限公司 | Load voltage detecting circuit and corresponding load voltage detecting method |
| CN104519644B (en) * | 2014-10-29 | 2018-02-16 | 杰华特微电子（杭州）有限公司 | Load voltage detects circuit and corresponding load voltage detection method |
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