CN103857138A - LED driving power source of integrated light source and LED fluorescent lamp - Google Patents
LED driving power source of integrated light source and LED fluorescent lamp Download PDFInfo
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- CN103857138A CN103857138A CN201210523562.5A CN201210523562A CN103857138A CN 103857138 A CN103857138 A CN 103857138A CN 201210523562 A CN201210523562 A CN 201210523562A CN 103857138 A CN103857138 A CN 103857138A
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Abstract
The invention relates to the lighting technology of semiconductors, in particular to an LED driving power source of an integrated light source, and an LED fluorescent lamp including the driving power source. The LED fluorescent lamp comprises a tube body, end covers located at the two ends of the tube body, and the LED driving power source, wherein plug pins adaptive to a fluorescent lamp base are arranged on the end covers. The LED driving power source comprises a strip-shaped substrate fixed in the tube body, a plurality of LED units which are arranged on the strip-shaped substrate and coupled in parallel-serial connection, and driving circuit modules which are arranged at one end or two ends of the strip-shaped substrate and electrically connected with the LED units.
Description
Technical field
the present invention relates to semiconductor lighting technology, the particularly integrated LED driving power of light source, the LED fluorescent lamp that comprises this driving power.
Background technology
the light-emitting diode (LED) that is used as at present light source in lighting device is a kind of solid-state semiconductor device, and its basic structure generally comprises the support of band lead-in wire, the encapsulating material (for example silica gel or epoxy resin) that is arranged on the semiconductor wafer on support and this wafer surrounding is sealed.Above-mentioned semiconductor wafer includes P-N structure, and in the time that electric current passes through, electronics is pushed to P district, and in P district, electronics, with hole-recombination, then sends energy with the form of photon, and light wavelength is to be determined by the material that forms P-N structure.
compared with traditional fluorescent lamp, LED fluorescent lamp has that photoelectric conversion efficiency is high, light-source brightness is constant, without stroboscopic with containing plurality of advantages such as harmful heavy metals.Typical LED fluorescent tube is made up of tube tube body, end cap, lamp plate and driving power, and wherein driving power can be built in body or be arranged on body outside.
chinese utility model patent 200920134372.8 discloses a kind of by fluorescent lamp external LED power supply, it comprises LED daylight lamp body, on this lamp body, be connected with external LED power supply, this LED power supply comprises PCB circuit board, input and output terminal, power pack, PCB circuit board is built in power pack, and input terminal is connected with LED daylight lamp body by PCB circuit board, lead-out terminal.Adopt external power supply to do larger change to the mode of connection of fluorescent lamp, and install also inconvenient.
chinese invention patent application 201110037855.9 discloses a kind of LED fluorescent lamp, the end cap that it comprises fluorescent tube and is arranged on lamp tube ends, wherein fluorescent tube comprises plurality of LEDs on lamp plate of lamp plate, array and is positioned at the bright dipping case above LED, the step-down constant-current source module that constant current is provided to LED is installed in end cap, and the both positive and negative polarity conducting end of lamp plate is connected to the output of step-down constant-current source module.It is pointed out that above-mentioned LED fluorescent lamp abandoned the constraint of original daylight lamp holder in design completely, although it is not this is conducive to optimize fluorescent structure and circuit design, good with the compatibility of existing daylight lamp holder.
Summary of the invention
the object of this invention is to provide a kind of LED driving power of integrated optical source, its have simple in structure, compact and with the compatible advantage such as good of existing daylight lamp holder.
lED driving power according to the integrated optical source of one embodiment of the invention comprises:
strip substrate;
multiple being arranged on described strip substrate and the LED unit of series coupled; And
drive circuit module, it is disposed in the one or both ends of described strip substrate and is electrically connected with described LED unit.
in the above-described embodiments, LED unit and drive circuit module are integrated on same substrate, thereby can reduce the volume of photovoltaic element, and this is conducive to the optimization of LED fluorescent lamp general structure.
preferably, described strip substrate is ceramic substrate, heat conductive insulating polymer composite material board, glass mat or aluminium base.
preferably, in above-mentioned LED driving power, described drive circuit module comprises:
bridge rectifier filter unit;
dC-DC boosting inverter unit, comprise inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, described inductor and switching diode are connected between described bridge rectifier filter unit and described LED unit, the drain electrode of described metal-oxide-semiconductor is electrically connected between described inductor and the positive pole of switching diode, the output electrical connection of grid and described PWM controller; And
feedback unit, comprises transistor, and its base stage is electrically connected to the loop of described LED unit, and collector electrode is electrically connected to the control end of described PWM controller.
in the above-described embodiments, provide feedback signal by transistor to PWM controller, realized the function of constant current and constant voltage simultaneously.In addition, in the drive circuit module of said structure, component number is less and can realize miniaturization, therefore makes LED unit and drive circuit module be integrated on same substrate and become possibility.
preferably, in the above-described embodiments, described drive circuit module also comprises the capacitor of electrical connection between control end and the ground connection of described PWM controller.By selecting large value capacitor, can make feedback loop response slow down, thereby reach the object of power factor correcting.
preferably, in the above-described embodiments, described PWM controller and metal-oxide-semiconductor are integrated in same integrated circuit (IC) chip.Or preferably, described PWM controller, metal-oxide-semiconductor and transistor are integrated in same integrated circuit (IC) chip.The integrated reliability that improved of above-mentioned multiple semiconductor device, and contribute to the miniaturization of drive circuit module.
preferably, in the above-described embodiments, described drive circuit module also comprises anodal pin and the negative pole pin of the same one end that is arranged on described strip substrate, is electrically connected respectively with live wire and the zero line of external ac power source.
of the present invention also have an object to be to provide a kind of LED fluorescent lamp, its have simple in structure, compact, get well and the advantage such as easy for installation with existing daylight lamp holder is compatible.
lED fluorescent lamp according to one embodiment of the invention comprises:
body;
be positioned at the end cap at described body two ends, on it, be provided with the pin of adaptive daylight lamp holder;
lED driving power, comprising:
be fixed on the strip substrate of described body inside;
multiple being arranged on described strip substrate and the LED unit of series coupled;
drive circuit module, it is disposed in the one or both ends of described strip substrate and is electrically connected with described LED unit and described pin.
preferably, in the above-described embodiments, described body is made up of plastics or glass.
in the above-described embodiments, preferably, further comprise the removable connector between live wire and the described anodal pin that is connected to external ac power source.Better, described removable connector comprises Interface Terminal, the starter socket adaptation on described pin and Inductive ballast.
make line conduction by insert again above-mentioned connector after completing LED fluorescent lamp installation steps, can greatly reduce the generation of electric shock accidents.
Accompanying drawing explanation
above-mentioned and/or other side of the present invention and advantage become the description of the various aspects by below in conjunction with accompanying drawing more clear and are easier to understand, and in accompanying drawing, same or analogous unit adopts identical label to represent.
fig. 1 is according to the schematic diagram of the LED driving power of the integrated optical source of one embodiment of the invention.
the circuit theory diagrams that Fig. 2 is a kind of drive circuit module of comprising in the driving power of LED shown in Fig. 1.
the circuit theory diagrams that Fig. 3 is the another kind of drive circuit module that comprises in LED driving power shown in another Fig. 1.
fig. 4 is according to the decomposing schematic representation of the LED fluorescent lamp of one embodiment of the invention.
fig. 5 A is the winding diagram of common fluorescent lamp, and Fig. 5 B is the winding diagram of LED fluorescent lamp embodiment illustrated in fig. 4.
fig. 6 is according to the decomposing schematic representation of the LED fluorescent lamp of another embodiment of the present invention.
reference list:
1 LED fluorescent lamp
the LED driving power of 10 integrated optical sources
110 substrates
120 light-emitting diodes (LED) unit
130 driving power modules
the anodal pin of 130A
130B negative pole pin
131 bridge rectifier filter units
132 DC-DC boosting inverter unit
133 feedback units
bR1 full-bridge rectifier
c1, C2, C3, C4, C5, C6 capacitor
d1 switching diode
l1, L2 inductor
lED1-LEDn LED load
q1 transistor
r1, R2, R3, R4, R5 resistor
t1 metal-oxide-semiconductor
u1 switch adjuster
u2 PWM controller
20 bodys
30 end caps
30A sleeve
30B cover plate
310A, 310B pin
40 end caps
40A sleeve
40B cover plate
410A, 410B pin
50 removable connectors
2 Inductive ballasts
3 starters
embodiment
below with reference to the accompanying drawing that wherein illustrates illustrative examples of the present invention, the present invention is described more all sidedly.But the present invention can realize by multi-form, and should not be read as the each embodiment that only limits to provide herein.The various embodiments described above that provide are intended to make disclosure herein comprehensively complete, convey to more all sidedly those skilled in the art's protection scope of the present invention.
in this manual, unless stated otherwise, term " semiconductor crystal wafer " such as refers to, at the upper multiple independently single circuit that form of semi-conducting material (silicon, GaAs etc.), " semiconductor wafer " or " wafer (die) " refers to this single circuit, and " packaged chip " refers to the physical structure of semiconductor wafer after encapsulation, in typical this physical structure, semiconductor wafer is for example installed on support and encapsulates with encapsulant.
term " light emitting diode " refers to the unit that comprises electroluminescent material, and the example of this unit includes but not limited to P-N knot inorganic semiconductor light-emitting diode and Organic Light Emitting Diode (OLED and polymer LED (PLED)).
p-N knot inorganic semiconductor light-emitting diode described here can have different version, for example, include but not limited to LED core and light-emitting diode monomer.Wherein, " LED core " refers to and includes semiconductor wafer P-N structure, that have electroluminescence ability, and " light-emitting diode monomer " refers to the physical structure forming after die package, in typical this physical structure, tube core is for example installed on support and encapsulates with encapsulant.
term " wiring ", " wiring pattern " and " wiring layer " refer to the conductive pattern for being electrically connected between components and parts of arranging on insulating surface, include but not limited to cabling (trace) and hole (as pad, component hole, fastener hole and plated-through hole etc.).
term " thermal radiation " refer to object owing to thering is temperature the phenomenon of radiated electromagnetic wave.
term " heat conduction " refers to heat and is sent to from the higher part of temperature in solid the transfer mode of the part that temperature is lower.
" electrical connection " and " coupling " should be understood to be included in the situation that directly transmits electric flux or the signal of telecommunication between two unit, or indirectly transmits the situation of electric flux or the signal of telecommunication through one or more Unit the 3rd.
" driving power " or " LED driving power " refers to and is connected to the interchange (AC) of lighting device outside or direct current (DC) power supply and as " electronic-controlled installation " between the light-emitting diode of light source, is used to light-emitting diode that required curtage (such as constant current, constant voltage or firm power etc.) is provided.In specific embodiment, driving power can modular structure be realized, for example it comprises printed circuit board (PCB) and one or more components and parts that are electrically connected together on printed circuit board (PCB) and by wiring that are arranged on, and the example of these components and parts includes but not limited to LED driving governor chip, rectification chip, resistor, capacitor and coil etc.
term such as " comprising " and " comprising " represent except have in specification and claims, have directly and the unit and step of clearly statement, technical scheme of the present invention is not got rid of yet and is had other unit of directly or clearly not explained and the situation of step.
term such as " first ", " second ", " the 3rd " and " the 4th " does not represent that unit is to be only used as to distinguish each unit in the order of the aspects such as time, space, size.
term such as " object A is arranged on the surface of object B " should be broadly interpreted as the surface that object A is directly placed on to object B, or object A is placed on to the surface that has other object contacting with object B.
by accompanying drawing, embodiments of the invention are described below.
fig. 1 is according to the schematic diagram of the LED driving power of the integrated optical source of one embodiment of the invention.
the LED driving power 10 of the integrated optical source of the present embodiment comprises substrate 110, multiple light-emitting diode (LED) unit 120 and driving power module 130.Below each component units is further described.
referring to Fig. 1, multiple LED unit 120 along substrate longitudinal arrangement to form uniform luminous zone.Although the LED unit shown in figure is arranged on substrate with form in upright arrangement, arrangement mode is not limited to this, and for example can also arrange in the mode of multiple row or S shape in LED unit.LED unit 120 can adopt the form of packaged chip or tube core, and it is for example installed on substrate 110 by surface mount process.In addition, also can adopt surface mount process that the components and parts of driving power module 130 to be described in detail below are also arranged on substrate 110.
in the present embodiment, multiple LED unit 120 is connected in series together, and drive circuit module 130 is for example electrically connected by the wiring on substrate 110 and LED unit 120, thereby provides constant electric current and/or voltage to the latter.It is worthy of note, although in the present embodiment, multiple LED unit links together with series system, and they also can be in parallel, the form of series-parallel connection or crossed array links together.
referring to Fig. 1, the components and parts of drive circuit module 130 are arranged in the two ends of substrate 110.In addition, be provided with pin 130A and 130B in one end of substrate 110, respectively as positive pole and the negative pole of LED drive circuit module 130.In the time of work, the live wire electrical connection of anodal pin 130A and external ac power source (for example civil power), and the electrical connection of the zero line of negative pole pin 130B and external ac power source, thus external ac power source is powered to drive circuit module 130.
although it is pointed out that the components and parts of drive circuit module 130 are arranged on the two ends of substrate 110 as shown in Figure 1, it is also feasible that these components and parts are only arranged on to one end.Also it is pointed out that anodal pin 130A and negative pole pin 130B also can be arranged on the two ends of substrate 110.
driving power module can adopt the circuit of various topological structures, for example, include but not limited to non-isolated buck-type topological circuit structure, reverse exciting topological circuit structure and half-bridge LLC topological circuit structure etc.Can be referring to " LED illumination driving power source and Design of Luminaires " book of the 1st edition in People's Telecon Publishing House's May in 2011 about the detailed description of driving power module, this publication in full way of reference comprises in this manual.
driving power module 130 can multiple type of drive (mode such as such as constant voltage power supply, constant current-supplying and constant pressure and flow power supply) provide suitable curtage to LED unit, it can be made up of one or more independently parts.In the present embodiment, the one or more parts in driving power module are realized with the form of wafer or packaged chip.
the circuit theory diagrams that Fig. 2 is a kind of drive circuit module of comprising in the driving power of LED shown in Fig. 1.
as shown in Figure 2, bridge rectifier filter unit 131 comprises full-bridge rectifier BR1, capacitor C1, C2, C3, varistor R1 and inductor L1.Alternating current (for example civil power) is exported all-wave pulsating voltage after full-bridge rectifier BR1 rectification on positive terminal 1.Filtering capacitor C1, C2, C3, varistor R1 and inductor L1 form EMI filter circuit, and it suppresses the impact on drive circuit of High-frequency Interference in AC network on the one hand, suppresses on the other hand the electromagnetic interference of drive circuit to AC network.
it is worthy of note, although shown here is way of full-wave rectification, in an embodiment of the present invention, halfwave rectifier is also available.
referring to Fig. 2, filtering capacitor C1 and varistor R1 are connected in parallel between the ac input end B3 and B4 of full-bridge rectifier BR1, and wherein varistor R1 clamps down on the input voltage of full-bridge rectifier BR1 in predetermined level by suppressing the abnormal overvoltage occurring in circuit.Filtering capacitor C2, C3 and inductor L1 composition π type filter circuit and electrical connection are between the positive terminal B1 and negative pole end B2 of full-bridge rectifier BR1, so that the pulsating voltage of full-bridge rectifier BR1 output is carried out to low-pass filtering.
the multiple LEDs unit 120 of boosting inverter unit 132 together with being also middle series coupled embodiment illustrated in fig. 1 with bridge rectifier filter unit 131, feedback unit 133 with LED load LED1-LEDn() electrical connection, its pulsating voltage that bridge rectifier filter unit 131 is exported is promoted to required voltage and current level and offers LED load.In addition, DC-DC boosting inverter unit 132 also with feedback unit 133 collaborative works so that offer the electric current of LED load and voltage keeps constant and realizes power factor correcting function.Under typical application scenario, the total voltage after multiple LED units in series is designed to exceed the voltage peak of electrical network input, and therefore the lifting of voltage is essential.220V alternating current take fluctuation range as ± 10% is as example, and its ceiling voltage is about 342V, and LED series voltage will exceed 342V.
in the present embodiment, DC-DC boosting inverter unit 132 comprises inductor L2, switching diode D1, capacitor C6 and switch adjuster U1.
preferably, can adopt the integrated circuit (IC) chip that is integrated with pulse-width modulation (PWM) controller and metal oxide semiconductor field effect tube (below again referred to as metal-oxide-semiconductor) as switch adjuster U1, wherein the output of PWM controller and the grid of metal-oxide-semiconductor are electrically connected to realize the control to metal-oxide-semiconductor turn-on and turn-off.In concrete switch adjuster chip, in order to simplify the adjusting of duty ratio, the switching frequency that can keep metal-oxide-semiconductor is definite value (for example about 1MHz), and the turn-off time of metal-oxide-semiconductor is adjustable; Or the turn-off time that can keep metal-oxide-semiconductor is definite value (for example about 320ns), and the switching frequency of metal-oxide-semiconductor is adjustable.Typically, this class switch adjuster chip generally all configure the feedback pin being electrically connected with the drain lead of the drain electrode electrical connection of metal-oxide-semiconductor, with the control end of PWM controller.CW12L30 and CW12L40 chip etc. that the example of above-mentioned switch adjuster is produced including, but not limited to Chinese Pu Xinda Electronics Co., Ltd..
as shown in Figure 2, inductor L2 and switching diode D1 are connected between bridge rectifier filter unit 131 and LED load, the wherein positive pole of switching diode D1 and inductor L2 electrical connection, and negative pole is connected with LED load electrical.Preferably, can adopt speed is fast, pressure drop is little Schottky diode as switching diode D1.Continue referring to Fig. 2, the drain lead D of switch adjuster U1 is electrically connected between inductor L2 and the positive pole of switching diode D1, and feedback pin FB and feedback unit 133 are electrically connected.In addition, in the embodiment shown in Figure 2, the negative pole that capacitor C6 and LED load are connected to switching diode D1 altogether with in the time that switching diode D1 ends to LED load discharge.
referring to Fig. 2, switch adjuster U1 comprises power pins VCC and grounding pin GND, and wherein power pins VCC is through capacitor C4 ground connection.
the operation principle of drive circuit module 130 shown in Fig. 2 is below described.
in the time connecting AC power, bridge rectifier filter unit 131 is transformed to pulsating voltage by the alternating current of input and exports the inductor L2 of DC-DC boosting inverter unit 132 to.The metal-oxide-semiconductor of switch adjuster U1 inside under the control of PWM controller signals with very high frequency turn-on and turn-off.
in the time of MOS conducting, under the effect of the output voltage of bridge rectifier filter unit 131, electric current flow through inductor L2 and metal-oxide-semiconductor, switching diode D1 ends because of the voltage on capacitor C6.Along with the electric current of the inductor L2 that flows through constantly increases, in inductor, the energy of storage is also on the increase.Now, LED load is powered by capacitor C6, and it relies on the discharging current work of capacitor C6.
in the time that metal-oxide-semiconductor switches to off state, the electric current of the inductor L2 that flows through starts to reduce, thereby brings out induced electromotive force at the two ends of inductor L2, and its polarity is that the upper positive right side is negative.The superimposed rear output voltage that promotes bridge rectifier filter unit 131 of output voltage of induced electromotive force and bridge rectifier filter unit 131.Now, the voltage of stack is higher than the voltage on capacitor C6, and therefore switching diode D1 enters conducting state, and LED load changes by inductor L2 powers, and capacitor C6 is also charged by inductor L2 and until metal-oxide-semiconductor switches to conducting state once again.In the present embodiment, the size of induced electromotive force depends on the duty ratio of metal-oxide-semiconductor, therefore can promote amplitude by regulating the duty ratio of PWM controller output signal to obtain desirable voltage.
in the time that metal-oxide-semiconductor is switched back to conducting state once again, the superimposed voltage at switching diode D1 place starts to reduce and by again lower than the voltage on capacitor C6, therefore switching diode D1 enters cut-off state, LED load changes the power voltage supply to promote by capacitor C6, and inductor L2 starts storage of electrical energy.
therefore under the control of PWM controller, metal-oxide-semiconductor constantly switches between above-mentioned turn-on and turn-off state, thereby makes the voltage on LED load positive pole remain at higher voltage levvl.
referring to Fig. 2, LED load and resistor R4, R5 are connected in parallel between the negative pole and resistor R2 of switching diode D1, and the negative pole of LED load is electrically connected to the base stage of transistor Q1.In the time there is fluctuation in the electric current of the LED load of flowing through and/or voltage, the electric current of base stage of transistor Q1 of flowing through also can change, feedback signal after transistor Q1 amplifies exports the feedback pin of switch adjuster U1 to through resistor R3 from collector electrode, PWM controller can be adjusted the duty ratio of output signal according to feedback signal thus, makes thus the electric current and the voltage that offer LED load keep constant.
in the embodiment shown in Figure 2, the feedback pin FB of switch adjuster U1 is also through jumbo capacitor C5 ground connection, and this can make the response of feedback control loop slow down, feedback level in the alternating current transmission line half period close to constant.Substantially invariable feedback level is illustrated in electric current in metal-oxide-semiconductor corresponding to be sent to the average energy in LED load within the half period of alternating current circuit.Due to switch adjuster, U1 works in fixed frequency, and before metal-oxide-semiconductor ON time finishes, the increase of electric current can not exceed certain scope.By reduce the switching current of the metal-oxide-semiconductor of flowing through in the time that the alternating voltage of input increases, and in the time that reducing, the alternating voltage of input increases the switching current of the metal-oxide-semiconductor of flowing through, make the corrugated minimum of LED load input terminal, and exchange input current and can follow the tracks of the variation of AC-input voltage the moment, thereby realize the function of power factor correcting.
it is to be noted, in the embodiment shown in Figure 2, PWM controller and metal-oxide-semiconductor are integrated in same integrated circuit (IC) chip, in order further to improve integrated level, it is also conceivable that transistor Q1, PWM controller and metal-oxide-semiconductor three are integrated in same integrated circuit (IC) chip.
alternatively, PWM controller and metal-oxide-semiconductor also can be provided in according in LED driving power embodiment illustrated in fig. 1 with the form of discrete circuit element.Drive circuit module shown in Fig. 3 shows an example of this form, wherein adopts identical label to represent with same or analogous unit in Fig. 2.
referring to Fig. 3, DC-DC boosting inverter unit 132 comprises inductor L2, switching diode D1, capacitor C6, PWM controller U2 and metal-oxide-semiconductor T1, wherein, inductor L2 and switching diode D1 are connected between bridge rectifier filter unit 131 and LED load, the positive pole of switching diode D1 and inductor L2 electrical connection, negative pole is connected with LED load electrical.In the present embodiment, the drain D of metal-oxide-semiconductor T1 is electrically connected between inductor L2 and the positive pole of switching diode D1, and source S is electrically connected to ground connection, and grid G is connected with the output P of PWM controller U2.PWM controller U2 generally provides with the form of integrated circuit (IC) chip, and its control end FB and feedback unit 133 are electrically connected.As shown in Figure 3, capacitor C6 be electrically connected between the negative pole of switching diode D1 and LED load with in the time that switching diode D1 ends to LED load discharge.
similar to shown in Fig. 2 of the operation principle of drive circuit module shown in Fig. 3 therefore repeats no more herein.
alternatively, the circuit of all right other function of integration realization in the driving power module shown in above-mentioned Fig. 2 and 3, such as adjusting control circuit, sensing circuit, intelligent lighting control circuit, telecommunication circuit and protective circuit etc.These circuit can be integrated in same semiconductor wafer or packaged chip with driving governor, or these circuit can provide with the form of semiconductor wafer or packaged chip individually, or some or all in these circuit can be combined and provide with the form of semiconductor wafer or packaged chip.
fig. 4 is according to the decomposing schematic representation of the LED fluorescent lamp of one embodiment of the invention.
in the present embodiment, when body is made of plastics and end cap while being made up of plastics or aluminium, can end cap 30,40 be fixed on by adhesive to the two ends of body 20.Substrate 110 for example can be fixed on by bonding mode the inwall of body 20, or can be fixed on body 20(by end cap 30 and 40 is for example fixed together with end cap 30 by anodal pin 130A and negative pole pin 130B are inserted to end cap 30), or draw-in groove can be set in body and be fixed on inboard wall of tube body by the frictional force between substrate 110 and draw-in groove.It is worthy of note, pin 40A and 40B on end cap 40 are optional, but they can make LED fluorescent lamp and lamp socket be assembled together more firmly.
as mentioned above, the anodal pin 130A of LED fluorescent lamp 1 is electrically connected to the live wire of external ac power source through the pin 310A of end cap 30.Therefore in the time that fluorescent lamp is installed, if accidentally make switch closure, may cause electric shock accidents.For eliminating this type of danger, alternatively, the LED fluorescent lamp 1 of the present embodiment also can comprise the removable connector between live wire and the anodal pin 130A that is serially connected in external ac power source, and in the time that LED fluorescent lamp is installed, this connector is removed to cut off the electrical connection of anodal pin 130A and live wire.
fig. 5 A and 5B are respectively the winding diagram of common fluorescent lamp and LED fluorescent lamp embodiment illustrated in fig. 4.
compared with Fig. 5 A, under the mode of connection shown in Fig. 5 B, Inductive ballast 2 is by short circuit, starter 3 is replaced by removable connector 50, and the pin 310A of LED fluorescent lamp 1 is electrically connected to the live wire L of external ac power source through removable connector 50, pin 310B is electrically connected to zero line N, and the pin 410A of end cap 40 and 410B are no longer electrically connected with external ac power source.From Fig. 5 B, in removable connector 50 is serially connected in the loop at pin 310A and live wire L place and when K switch is closed, external ac power source could be powered to LED fluorescent lamp 1.And in the time that removable connector 50 is removed, even K switch closure, anodal pin 130A place is not charged yet, eliminate thus electric shock hidden danger.
in the time that the LED fluorescent lamp of the present embodiment is installed to the lamp socket of common fluorescent lamp, removable connector 50 can adopt the form of similar starter, it comprise with Inductive ballast on the Interface Terminal that matches of starter socket, correspondingly, the back panel wiring terminal of Inductive ballast 2 connects according to the requirement of annexation shown in Fig. 5 B, can form or cut off the electrical connection between pin 310A and live wire L by plug removable connector on Inductive ballast thus.
although it is pointed out that in the embodiment shown in fig. 4, the pin that is connected electrically to live wire and zero line is arranged on same end cap, and this is also nonessential.In fact the pin that is connected electrically to live wire and zero line being separately positioned on is also feasible on different end caps, and in the time that the anodal pin of LED driving power and negative pole pin are positioned at the two ends of substrate, above-mentioned setting is useful.
fig. 6 is the decomposing schematic representation that also has the LED fluorescent lamp of an embodiment according to the present invention.
the LED fluorescent lamp of the present embodiment is compared with shown in Fig. 4, and difference is mainly end cover structure, below this is further described.For other side, the present embodiment can adopt the various features of previous embodiment, therefore no longer describes in detail.
although represented and aspects more of the present invention be discussed, but those skilled in the art are to be appreciated that and can change aspect above-mentioned under the condition that does not deviate from the principle of the invention and spirit, therefore scope of the present invention will be limited by claim and the content that is equal to.
Claims (10)
1. a LED driving power for integrated optical source, comprising:
Strip substrate;
Multiple being arranged on described strip substrate and the LED unit of series coupled; And
Drive circuit module, it is disposed in the one or both ends of described strip substrate and is electrically connected with described LED unit.
2. LED driving power as claimed in claim 1, wherein, described drive circuit module comprises:
Bridge rectifier filter unit;
DC-DC boosting inverter unit, comprise inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, described inductor and switching diode are connected between described bridge rectifier filter unit and described LED unit, the drain electrode of described metal-oxide-semiconductor is electrically connected between described inductor and the positive pole of switching diode, the output electrical connection of grid and described PWM controller; And
Feedback unit, comprises transistor, and its base stage is electrically connected to the loop of described LED unit, and collector electrode is electrically connected to the control end of described PWM controller.
3. LED driving power as claimed in claim 2, wherein, described PWM controller and metal-oxide-semiconductor are integrated in same integrated circuit (IC) chip.
4. LED driving power as claimed in claim 2, wherein, described PWM controller, metal-oxide-semiconductor and transistor are integrated in same integrated circuit (IC) chip.
5. LED driving power as claimed in claim 1, wherein, described drive circuit module also comprises anodal pin and the negative pole pin of the same one end that is arranged on described strip substrate, is electrically connected respectively with live wire and the zero line of external ac power source.
6. a LED fluorescent lamp, comprising:
Body;
Be positioned at the end cap at described body two ends, on it, be provided with the pin of adaptive daylight lamp holder;
LED driving power, comprising:
Be fixed on the strip substrate of described body inside;
Multiple being arranged on described strip substrate and the LED unit of series coupled;
Drive circuit module, it is disposed in the one or both ends of described strip substrate and is electrically connected with described LED unit and described pin.
7. LED fluorescent lamp as claimed in claim 6, wherein, described drive circuit module comprises:
Bridge rectifier filter unit;
DC-DC boosting inverter unit, comprise inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, described inductor and switching diode are connected between described bridge rectifier filter unit and LED load, the drain electrode of described metal-oxide-semiconductor is electrically connected between described inductor and the positive pole of switching diode, the output electrical connection of grid and described PWM controller; And
Feedback unit, comprises transistor, and its base stage is electrically connected to the loop of described LED unit, and collector electrode is electrically connected to the control end of described PWM controller.
8. LED fluorescent lamp as claimed in claim 6, wherein, described drive circuit module also comprises anodal pin and the negative pole pin of the same one end that is arranged on described strip substrate, it is electrically connected with live wire and the zero line of external ac power source respectively through described pin.
9. LED fluorescent lamp as claimed in claim 8, wherein, further comprises the removable connector between live wire and the described anodal pin that is suitable for being connected to external ac power source.
10. LED fluorescent lamp as claimed in claim 9, wherein, described removable connector comprises Interface Terminal, the starter socket adaptation on described Interface Terminal and Inductive ballast.
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| CN201210523562.5A CN103857138B (en) | 2012-12-07 | 2012-12-07 | The LED drive power and LED daylight lamp of integrated optical source |
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| CN201210523562.5A CN103857138B (en) | 2012-12-07 | 2012-12-07 | The LED drive power and LED daylight lamp of integrated optical source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021120445A1 (en) * | 2019-12-20 | 2021-06-24 | 美芯晟科技（北京）有限公司 | Drive circuit, and related circuit and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201875508U (en) * | 2010-12-10 | 2011-06-22 | 李文雄 | LED (light-emitting diode) lamp with integrated power supply |
| CN202565513U (en) * | 2012-02-07 | 2012-11-28 | 深圳市比格利电源科技有限公司 | Built-in drive power of light-emitting diode (LED) fluorescent lamp |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201875508U (en) * | 2010-12-10 | 2011-06-22 | 李文雄 | LED (light-emitting diode) lamp with integrated power supply |
| CN202565513U (en) * | 2012-02-07 | 2012-11-28 | 深圳市比格利电源科技有限公司 | Built-in drive power of light-emitting diode (LED) fluorescent lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021120445A1 (en) * | 2019-12-20 | 2021-06-24 | 美芯晟科技（北京）有限公司 | Drive circuit, and related circuit and device |
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| CN103857138B (en) | 2017-12-15 |
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