CN103857138B - The LED drive power and LED daylight lamp of integrated optical source - Google Patents

Abstract

The present invention relates to semiconductor illumination technique, is more particularly to integrated with the LED drive power of light source, the LED daylight lamp comprising the driving power.Include according to the LED daylight lamp of the embodiment of the present invention：Body；End cap positioned at the body both ends, it is provided with the pin of adaptation daylight lamp holder；LED drive power, including：It is fixed on the strip substrate of the tubular body；It is multiple to be arranged on the strip substrate the simultaneously LED unit of series coupled；Drive circuit module, it is disposed in the one or both ends of the strip substrate and is electrically connected with the LED unit.

Description

The LED drive power and LED daylight lamp of integrated optical source

Technical field

The present invention relates to semiconductor illumination technique, is more particularly to integrated with the LED drive power of light source, comprising driving electricity The LED daylight lamp in source.

Background technology

It is used as the light emitting diode of light source in lighting device at present（LED）It is a kind of solid state semiconductor devices, it Basic structure generally comprises the support with lead, the semiconductor wafer being arranged on support and the chip is sealed around Encapsulating material（Such as silica gel or epoxy resin）.Above-mentioned semiconductor wafer includes P-N junction structure, when an electric current passes through it, electronics P areas are pushed to, in P areas then electronics sends energy, and the wavelength of light is then by being formed with hole-recombination in the form of photon What the material of P-N junction structure determined.

Compared with traditional fluorescent lamp, LED daylight lamp has that photoelectric transformation efficiency is not high, light-source brightness is constant, without stroboscopic and not Many advantages, such as containing harmful heavy metal.Typical LED fluorescent lamp tube is made up of tube tube body, end cap, lamp plate and driving power, its Middle driving power can be built in body or outside body.

Chinese utility model patent 200920134372.8 discloses a kind of fluorescent lamp that LED power is external, and it includes LED daylight lamp body, external LED power is connected with the lamp body, the LED power includes PCB, input and output side Son, power pack, PCB are built in power pack, and input terminal passes through PCB, lead-out terminal and LED daylight lamp body Connection.Need to make the mode of connection of fluorescent lamp larger change using external power supply, and also inconvenience is installed.

Chinese invention patent application 201110037855.9 discloses a kind of LED daylight lamp, and it includes fluorescent tube and is arranged on The end cap of lamp tube ends, wherein fluorescent tube include plurality of LEDs on lamp plate of lamp plate, array and go out light shield above LED Shell, the interior oriented LED of installation of end cap provide the decompression constant current source module of constant current, and the both positive and negative polarity conducting end of lamp plate is connected to drop Press the output end of constant current source module.It is pointed out that above-mentioned LED daylight lamp has abandoned original daylight lamp holder completely in design Constraint, it is compatible bad with existing daylight lamp holder although this is advantageous to optimize fluorescent structure and circuit design.

The content of the invention

It is an object of the invention to provide a kind of LED drive power of integrated optical source, its have it is simple in construction, compact and with it is existing Have the advantages that daylight lamp holder compatibility is good.

LED drive power according to the integrated optical source of one embodiment of the invention includes：

Strip substrate；

It is multiple to be arranged on the strip substrate the simultaneously LED unit of series coupled；And

Drive circuit module, it is disposed in one or both ends of the strip substrate and electric with the LED unit Connection.

In the above-described embodiments, LED unit is integrated on same substrate with drive circuit module, so as to reduce The volume of photovoltaic element, this is advantageous to the optimization of LED daylight lamp general structure.

Preferably, the strip substrate is ceramic substrate, heat conductive insulating polymer composite material board, glass mat or aluminium Substrate.

Preferably, in above-mentioned LED drive power, the drive circuit module includes：

Bridge rectifier filter unit；

DC-DC boosting inverter units, including inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, the electricity Sensor and switching diode are connected between the bridge rectifier filter unit and the LED unit, the drain electrode electricity of the metal-oxide-semiconductor Gas is connected between the positive pole of the inductor and switching diode, and grid and the output end of the PWM controller are electrically connected； And

Feedback unit, including transistor, its base stage are electrically connected electric to the loop of the LED unit, colelctor electrode It is connected to the control terminal of the PWM controller.

In the above-described embodiments, by transistor to PWM controller provide feedback signal, while realize constant current and The function of constant pressure.In addition, in the drive circuit module of said structure, component number is less and can realize miniaturization, It is possibly realized hence in so that LED unit is integrated on same substrate with drive circuit module.

Preferably, in the above-described embodiments, the drive circuit module also includes and is electrically connected to the PWM controller Capacitor between control terminal and ground connection.By selecting large value capacitor, backfeed loop response can be made to slow down, so as to reach The purpose of power factor correcting.

Preferably, in the above-described embodiments, the PWM controller and metal-oxide-semiconductor are integrated in same IC chip. Or, it is preferable that the PWM controller, metal-oxide-semiconductor and transistor are integrated in same IC chip.It is above-mentioned more The integrated miniaturization for improving reliability, and contributing to drive circuit module of individual semiconductor devices.

Preferably, in the above-described embodiments, the drive circuit module also includes being arranged on the same of the strip substrate The positive pole pin and negative pin at end, it is electrically connected respectively with the live wire and zero line of external ac power source.

It is also an object of the present invention to provide a kind of LED daylight lamp, and it has simple in construction, compact and existing day The advantages that light lamp socket compatibility is good and easy for installation.

Include according to the LED daylight lamp of one embodiment of the invention：

Body；

End cap positioned at the body both ends, it is provided with the pin of adaptation daylight lamp holder；

LED drive power, including：

It is fixed on the strip substrate of the tubular body；

It is multiple to be arranged on the strip substrate the simultaneously LED unit of series coupled；

Drive circuit module, its be disposed in the one or both ends of the strip substrate and with the LED unit and institute State pin electrical connection.

Preferably, in the above-described embodiments, the body is made up of plastics or glass.

In the above embodiment, it is preferable that further comprise that the live wire for being connected to external ac power source draws with the positive pole Removable connector between pin.Preferably, the removable connector includes Interface Terminal, the pin and Inductive ballast On starter socket adaptation.

Make line conduction by being inserted into above-mentioned connector after LED daylight lamp installation steps are completed, can subtract significantly The generation of few electric shock accidents.

Brief description of the drawings

The above-mentioned and/or other side and advantage of the present invention becomes the description by the various aspects below in conjunction with accompanying drawing Become apparent from and be easier to understand, same or analogous unit, which is adopted, in accompanying drawing is indicated by the same numeral.

Fig. 1 is the schematic diagram according to the LED drive power of the integrated optical source of one embodiment of the invention.

Fig. 2 is a kind of circuit theory diagrams of drive circuit module shown in Fig. 1 included in LED drive power.

Fig. 3 is the circuit theory diagrams of another drive circuit module shown in another Fig. 1 included in LED drive power.

Fig. 4 is the decomposing schematic representation according to the LED daylight lamp of one embodiment of the invention.

Fig. 5 A are the wiring diagram of common fluorescent lamp, and Fig. 5 B are the wiring diagram of the LED daylight lamp of embodiment illustrated in fig. 4.

Fig. 6 is the decomposing schematic representation according to the LED daylight lamp of another embodiment of the present invention.

Reference list：

1 LED daylight lamp

The LED drive power of 10 integrated optical sources

110 substrates

120 light emitting diodes（LED）Unit

130 driving power modules

130A positive pole pins

130B negative pins

131 bridge rectifier filter units

132 DC-DC boosting inverter units

133 feedback units

BR1 full-bridge rectifiers

C1, C2, C3, C4, C5, C6 capacitor

D1 switching diodes

L1, L2 inductor

LED1-LEDn LED loads

Q1 transistors

R1, R2, R3, R4, R5 resistor

T1 metal-oxide-semiconductors

U1 switch adjusters

U2 PWM controllers

20 bodys

30 end caps

30A sleeves

30B cover plates

310A, 310B pin

40 end caps

40A sleeves

40B cover plates

410A, 410B pin

50 removable connectors

2 Inductive ballasts

3 starters

Embodiment

The present invention is more fully illustrated referring to which illustrates the accompanying drawing of illustrative examples of the present invention.But this hair It is bright to be realized by multi-form, and be not construed as being only limitted to each embodiment given herein.The above-mentioned each implementation provided Example is intended to make this paper disclosure comprehensively complete, is more fully communicated to those skilled in the art's protection scope of the present invention.

In this manual, unless stated otherwise, term " semiconductor crystal wafer " is referred in semi-conducting material（Such as silicon, GaAs etc.）Multiple independent single circuits of upper formation, " semiconductor wafer " or " chip（die）" refer to this single electricity Road, and " encapsulation chip " refers to physical arrangement of the semiconductor wafer after encapsulation, in typical this physical arrangement, half Conductor chip for example, be mounted on support and be encapsulated with encapsulant.

Term " light emitting diode " refers to including the unit of electroluminescent material, the example of this unit include but It is not limited to P-N junction inorganic semiconductor light emitting diode and Organic Light Emitting Diode（OLED and polymer LED （PLED））.

P-N junction inorganic semiconductor light emitting diode described here can have different structure type, for example, including but It is not limited to LED core and light emitting diode monomer.Wherein, " LED core " refers to including P-N junction structure , semiconductor wafer that there is electroluminescent ability, and " light emitting diode monomer " refers to the thing that will be formed after die package Structure is managed, in typical this physical arrangement, tube core for example, be mounted on support and be encapsulated with encapsulant.

What term " wiring ", " wiring pattern " and " wiring layer " referred to arranging on insulating surface is used for electricity between component The conductive pattern of gas connection, including but not limited to cabling（trace）And hole（Such as pad, component hole, fastener hole and plated through-hole Deng）.

Term " heat radiation " refers to object due to the phenomenon of radiated electromagnetic wave with temperature.

Term " heat transfer " refer to heat in solids from temperature it is higher be partially transferred to temperature relatively low part Transfer mode.

" electrical connection " and " coupling " should be understood to be included between two units directly transmission electric flux or electric signal Situation, or transmit the situation of electric flux or electric signal indirectly by one or more third units.

" driving power " or " LED drive power " refers to being connected to the exchange outside lighting device（AC）Or direct current（DC） Power supply and as " electronic-controlled installation " between the light emitting diode of light source, for providing required electric current for light emitting diode Or voltage（Such as constant current, constant voltage or firm power etc.）.In specific embodiments, driving power can be with module The structure of change is realized, such as it includes printed circuit board (PCB) and one or more installations are on a printed circuit and electric by connecting up The component to link together, the example of these components include but is not limited to LED drive control devices chip, rectification chip, electricity Hinder device, capacitor and coil etc..

The term of such as "comprising" and " comprising " etc is represented except direct with having in the specification and in the claims Beyond the unit and step clearly stated, technical scheme is also not excluded for having its do not stated directly or clearly The situation of its unit and step.

The term of such as " first ", " second ", " the 3rd " and " the 4th " etc is not offered as unit in time, space, big Small etc. order and be only to make to distinguish each unit to be used.

The term of such as " object A is arranged on object B surface " etc should be broadly interpreted as directly placing object A The surface with the object B other objects for having contact is placed on object B surface, or by object A.

Embodiments of the invention are described below by accompanying drawing.

Fig. 1 is the schematic diagram according to the LED drive power of the integrated optical source of one embodiment of the invention.

The LED drive power 10 of the integrated optical source of the present embodiment includes substrate 110, multiple light emitting diodes（LED）Unit 120 and driving power module 130.Each component units are further described below.

Substrate 110 is in strip as shown in Figure 1, and it can use the ceramic substrate made by mould pressing, this method The sheet material of manufacture is thicker（Such as 1.5-3mm）And hardness is high.Alternatively, substrate 110 can also use heat conductive insulating macromolecule Composite makes.In addition, in order to improve heat-sinking capability, infrared radiant material can be covered in substrate surface, or using simultaneous The material for having excellent insulation heat-conducting property and infrared radiation property makes substrate, so that from LED unit and driving electricity The heat of source module is distributed in a manner of heat transfer and heat radiation simultaneously.It is pointed out that except above-mentioned ceramics, heat conductive insulating Beyond polymer composite and infrared radiant material, substrate 110 can also be aluminium base or glass mat.

Referring to Fig. 1, multiple LED units 120 are along substrate longitudinal arrangement to form uniform luminous zone.Although shown in figure LED unit be arranged in the form of in upright arrangement on substrate, but arrangement mode is not limited thereto, such as LED unit can be with Arranged in a manner of multiple row or S-shaped.LED unit 120 can use the form of encapsulation chip or tube core, and it is for example pasted by surface Dress technique is installed on substrate 110.Alternatively, it is also possible to using surface mount process that driving to be described in detail below is electric The component of source module 130 is also mounted on substrate 110.

In the present embodiment, multiple LED units 120 are connected in series together, and drive circuit module 130 for example passes through base Wiring on plate 110 is electrically connected with LED unit 120, so as to which latter provides constant electric current and/or voltage.It is worth pointing out Although in the present embodiment, multiple LED units link together in a series arrangement, they can also in parallel, series-parallel connection Or the form of crossed array links together.

Referring to Fig. 1, the component of drive circuit module 130 is arranged in the both ends of substrate 110.In addition, in substrate 110 One end is provided with pin 130A and 130B, respectively as the positive pole and negative pole of LED driver circuit module 130.At work, positive pole Pin 130A and external ac power source（Such as civil power）Live wire electrical connection, and negative pin 130B and external ac power source Zero line is electrically connected, so that external ac power source is powered to drive circuit module 130.

It is pointed out that although the component of drive circuit module 130 is arranged on the two of substrate 110 as shown in Figure 1 End, but it is also feasible that these components are provided only on into one end.It may also be noted that positive pole pin 130A and negative pole draw Pin 130B can also be arranged on the both ends of substrate 110.

Driving power module can use the circuit of various topological structures, such as including but not limited to non-isolated buck topology Circuit structure, reverse exciting topological circuit structure and half-bridge LLC topological circuit structures etc..Detailed description about driving power module Reference can be made to People's Telecon Publishing House May the 1st edition in 2011《LED illumination driving power and Design of Luminaires》One book, the publication Comprising in this manual in a manner of being cited in full text.

Driving power module 130 can be with a variety of type of drive（Such as constant pressure power supply, constant current-supplying and constant pressure and flow power supply etc. Mode）Suitable curtage is provided to LED unit, it can be made up of one or more independent parts.In this implementation In example, one or more of driving power module part is realized in the form of chip or encapsulation chip.

Fig. 2 is a kind of circuit theory diagrams of drive circuit module shown in Fig. 1 included in LED drive power.

Drive circuit module 130 shown in Fig. 2 includes bridge rectifier filter unit 131, DC-DC boosting inverters unit 132 With feedback unit 133, unit is further described below.

As shown in Fig. 2 bridge rectifier filter unit 131 includes full-bridge rectifier BR1, capacitor C1, C2, C3, pressure-sensitive electricity Hinder device R1 and inductor L1.Alternating current（Such as civil power）All-wave pulsation is exported on positive terminal 1 after full-bridge rectifier BR1 rectifications Voltage.Filter condenser C1, C2, C3, piezoresistor R1 and inductor L1 form EMI filter circuit, and its one side suppresses to hand over Influence of the High-frequency Interference in power network to drive circuit is flowed, on the other hand suppresses electromagnetic interference of the drive circuit to AC network.

It is worthy of note that although being shown here as way of full-wave rectification, in an embodiment of the present invention, half-wave Rectification is also available.

Referring to Fig. 2, filter condenser C1 and piezoresistor R1 be connected in parallel on full-bridge rectifier BR1 ac input end B3 and Between B4, wherein piezoresistor R1 is by the abnormal overvoltage that occurs in suppression circuit by full-bridge rectifier BR1 input Voltage clamp is in predetermined level.Filter condenser C2, C3 and inductor L1 form π types filter circuit and are electrically connected to complete Between bridge rectifier BR1 positive terminal B1 and negative pole end B2, low pass filtered is carried out with the pulsating volage exported to full-bridge rectifier BR1 Ripple.

Boosting inverter unit 132 and bridge rectifier filter unit 131, feedback unit 133 and LED load LED1-LEDn（ The multiple LED units 120 being serially coupled together in embodiment illustrated in fig. 1）Electrical connection, it is by bridge rectifier filter unit The pulsating volage of 131 outputs is promoted to required voltage and current level and is supplied to LED load.In addition, DC-DC boosting inverters Unit 132 also cooperates with feedback unit 133, so as to be supplied to the electric current of LED load and voltages keep constant and realize work( Rate factor correction function.Under typical application scenario, the total voltage after multiple LED unit series connection is designed to defeated more than power network The voltage peak entered, therefore the lifting of voltage is required.So that fluctuation range is ± 10% 220V alternating currents as an example, it is most High voltage is about 342V, then LED strip connection voltage will exceed 342V.

In the present embodiment, DC-DC boosting inverters unit 132 include inductor L2, switching diode D1, capacitor C6 and Switch adjuster U1.

Preferably, it can use and be integrated with pulsewidth modulation（PWM）Controller and metal oxide semiconductor field effect tube（With Lower referred to as metal-oxide-semiconductor again）IC chip as switch adjuster U1, the wherein output end of PWM controller and metal-oxide-semiconductor Grid is electrically connected to realize the control to metal-oxide-semiconductor turn-on and turn-off.In specific switch adjuster chip, in order to which simplification accounts for The regulation of empty ratio, the switching frequency that can keep metal-oxide-semiconductor are definite value（Such as about 1MHz）, and the turn-off time of metal-oxide-semiconductor is adjustable Section；Or it is definite value that can keep turn-off time of metal-oxide-semiconductor（Such as about 320ns）, and the switching frequency of metal-oxide-semiconductor is adjustable 's.Typically, this kind of switch adjuster chip typically all with the drain lead of the drain electrode electrical connection of metal-oxide-semiconductor, with PWM control by configuration The feedback pin of the control terminal electrical connection of device processed.The example of above-mentioned switch adjuster includes but is not limited to the general core of China up to electricity CW12L30 and CW12L40 chips of sub- Co., Ltd's production etc..

As shown in Fig. 2 inductor L2 and switching diode D1 are connected on bridge rectifier filter unit 131 and LED load Between, wherein switching diode D1 positive pole is electrically connected with inductor L2, and negative pole is electrically connected with LED load.Preferably, may be used Using the Schottky diode that speed is fast, pressure drop is small as switching diode D1.With continued reference to Fig. 2, switch adjuster U1 leakage Pole pin D is electrically connected between inductor L2 and switching diode D1 positive pole, and feedback pin FB and feedback unit 133 Electrical connection.In addition, in the embodiment shown in Figure 2, capacitor C6 and LED load be connected to altogether switching diode D1 negative pole with Discharged when switching diode D1 ends to LED load.

Include power pins VCC and grounding pin GND referring to Fig. 2, switch adjuster U1, wherein power pins VCC is through electricity Container C4 is grounded.

Feedback unit 133 includes transistor Q1, resistor R2, R3 and capacitor C5.As shown in Fig. 2 the pole of crystal three Pipe Q1 uses the type of attachment of common emitter amplifying circuit, wherein, colelctor electrode is electrically connected to switch adjuster U1 through resistor R3 Feedback pin so that feedback signal is provided to switch adjuster U1, its emitter-base bandgap grading and ground connection electrical connection using as input circuit and The common ground end of output loop, and the loop of base stage access LED load is to extract detection signal.Resistor R2 is electrically connected To form input circuit between base stage and ground connection.In addition, switch adjuster U1 feedback pin FB is also grounded through capacitor C5.

The operation principle of drive circuit module 130 shown in Fig. 2 is described below.

When connecting AC power, the convert alternating current of input is pulsating volage and defeated by bridge rectifier filter unit 131 Go out to the inductor L2 of DC-DC boosting inverters unit 132.The control of metal-oxide-semiconductor inside switch adjuster U1 in PWM controller signal With very high frequency turn-on and turn-off under system.

When MOS is turned on, in the presence of the output voltage of bridge rectifier filter unit 131, electric current flows through inductor L2 And metal-oxide-semiconductor, switching diode D1 end because of the voltage on capacitor C6.As the electric current for flowing through inductor L2 constantly increases Greatly, the energy of inductor memory storage is also on the increase.Now, LED load is powered by capacitor C6, and it puts by capacitor C6's Electric current work.

When metal-oxide-semiconductor switches to off state, the electric current for flowing through inductor L2 starts to reduce, so as to the two of inductor L2 End induces induced electromotive force, and its polarity is upper positive right negative.The output voltage phase of induced electromotive force and bridge rectifier filter unit 131 The output voltage of bridge rectifier filter unit 131 is improved after superposition.Now, the voltage of superposition is higher than the electricity on capacitor C6 Pressure, therefore switching diode D1 enters conducting state, LED load changes is powered by inductor L2, and capacitor C6 is also by inductance Device L2 charges and until metal-oxide-semiconductor switching-on state once again.In the present embodiment, the size of induced electromotive force depends on The dutycycle of metal-oxide-semiconductor, therefore desired voltage increase width can be obtained by adjusting the dutycycle of PWM controller output signal Degree.

When metal-oxide-semiconductor is switched back to conducting state once again, the superimposed voltage at switching diode D1 starts to reduce and will again The secondary voltage less than on capacitor C6, therefore switching diode D1 enters cut-off state, LED load changes by capacitor C6 to be lifted Power voltage supply, and inductor L2 start store electric energy.

Therefore under the control of PWM controller, metal-oxide-semiconductor constantly switches between above-mentioned turn-on and turn-off state, from And the voltage on LED load positive pole is set to remain at higher voltage level.

Referring to Fig. 2, LED load and resistor R4, R5 are connected in parallel between switching diode D1 negative pole and resistor R2, and And the negative pole of LED load is electrically connected to transistor Q1 base stage.When the electric current and/or voltage for flowing through LED load occur During fluctuation, flowing through the electric current of transistor Q1 base stage can also change, the feedback signal after transistor Q1 amplifications Exported from colelctor electrode through resistor R3 to switch adjuster U1 feedback pin, PWM controller is it is possible thereby to according to feedback signal The dutycycle of output signal is adjusted, thus makes the electric current and voltages keep constant for being supplied to LED load.

In the embodiment shown in Figure 2, capacitor C5 ground connection of the switch adjuster U1 feedback pin FB also through Large Copacity, This can make the response of feedback control loop slow down, and feedback level is in the alternating current transmission line half period close to constant.It is substantially invariable Feedback level represents that the electric current in metal-oxide-semiconductor corresponds to the average energy being sent within the half period of alternating current circuit in LED load. Because switch adjuster U1 works in fixed frequency, before metal-oxide-semiconductor ON time terminates, the increase of electric current is without departing from one Fixed scope.The switching current of metal-oxide-semiconductor is flowed through by being reduced in the alternating voltage increase of input, and in the alternating current of input Increase flows through the switching current of metal-oxide-semiconductor when pressure is reduced, and makes the corrugated minimum of LED load input, and AC input current The change of AC-input voltage can be tracked constantly, so as to realize the function of power factor correcting.

It is pointed out that in the embodiment shown in Figure 2, PWM controller is integrated in same integrated circuit with metal-oxide-semiconductor In chip, in order to further improve integrated level, it is also contemplated that transistor Q1, PWM controller and metal-oxide-semiconductor three are integrated In same IC chip.

Alternatively, PWM controller and metal-oxide-semiconductor can also be provided in the form of discrete circuit element according to Fig. 1 institutes Show in the LED drive power of embodiment.Drive circuit module shown in Fig. 3 shows an example of this form, wherein with Same or analogous unit, which is adopted, in Fig. 2 is indicated by the same numeral.

Drive circuit module 130 shown in Fig. 3 equally includes bridge rectifier filter unit 131, DC-DC boosting inverter units 132 and feedback unit 133.Bridge rectifier filter unit 131 and feedback unit 133 use form and knot same as shown in Figure 2 Structure, here is omitted.

Referring to Fig. 3, DC-DC boosting inverters unit 132 includes inductor L2, switching diode D1, capacitor C6, PWM control Device U2 and metal-oxide-semiconductor T1 processed, wherein, inductor L2 and switching diode D1 are connected on bridge rectifier filter unit 131 and LED and born Between load, switching diode D1 positive pole and inductor L2 are electrically connected, and negative pole is electrically connected with LED load.In the present embodiment In, metal-oxide-semiconductor T1 drain D is electrically connected between inductor L2 and switching diode D1 positive pole, and source S is electrically connected to connecing Ground, grid G are connected with PWM controller U2 output end P.PWM controller U2 is provided typically in the form of IC chip, its Control terminal FB is electrically connected with feedback unit 133.As shown in figure 3, capacitor C6 is typically electrically connected in the negative of switching diode D1 Between pole and LED load with when switching diode D1 ends to LED load discharge.

Feedback unit 133 equally includes transistor Q1, resistor R2, R3 and capacitor C5.Transistor Q1 is adopted With the type of attachment of common emitter amplifying circuit, wherein, colelctor electrode is electrically connected to PWM controller U2 control terminal through resistor R3 FB by feedback signal to be supplied to PWM controller U2, and its emitter-base bandgap grading is with ground connection electrical connection to be used as input circuit and output loop Common ground end, and the loop of base stage access LED load is to extract detection signal.The control terminal FB of PWM controller is also passed through Capacitor C5 is grounded.

The operation principle of drive circuit module shown in Fig. 3 is similar to shown in Fig. 2, therefore here is omitted.

Alternatively, in the driving power module shown in above-mentioned Fig. 2 and 3 can with the circuit of the other functions of integration realization, Such as adjusting control circuit, sensing circuit, intelligent lighting controls circuit, telecommunication circuit and protection circuit etc..These circuits can be with It is integrated in drive control device in same semiconductor wafer or encapsulation chip, or these circuits can be individually with semiconductor die Piece or the form offer for encapsulating chip, or some or all of these circuits can be combined and with semiconductor wafer Or the form of encapsulation chip provides.

Fig. 4 is the decomposing schematic representation according to the LED daylight lamp of one embodiment of the invention.

LED daylight lamp 1 shown in Fig. 4 includes LED drive power 10, body 20 and end cap 30,40.Body 20 can be by moulding Material or glass are formed.In the present embodiment, LED drive power 10 can use above by embodiment Fig. 1-3 described structure and Form.Referring to Fig. 4, the substrate 110 of LED power 10 is fixed in the inside of body 20, and end cap 30 and 40 is fixed on body 20 Both ends are with closed tube 20.As shown in figure 4, a pair of pin 310A, 310B and 410A, 410B are set respectively on each end cap, its Pin 310A, 310B on middle end cap 30 are adapted for insertion into the jack in daylight lamp holder to be electrically connected to the fire of external ac power source Line and zero line, correspondingly, the positive pole pin 130A and negative pin 130B of drive circuit module 130 can be inserted into end cap 30 and difference It is electrically connected with pin 310A, 310B.

In the present embodiment, when body is made of plastics and end cap is made up of plastics or aluminium, can be incited somebody to action by adhesive End cap 30,40 is fixed on the both ends of body 20.Substrate 110 can for example be fixed on the inwall of body 20 by bonding mode, or Person can be fixed on body 20 by end cap 30 and 40（Such as by the way that positive pole pin 130A and negative pin 130B is inserted into end cap 30 and be fixed together with end cap 30）, or neck can be set in body and by the friction between substrate 110 and neck Power is fixed on inboard wall of tube body.It is worthy of note that what the pin 40A and 40B on end cap 40 were not required, but they can make LED daylight lamp is more firmly assembled together with lamp socket.

As described above, pin 310As of the positive pole pin 130A of LED daylight lamp 1 through end cap 30 is electrically connected to external communication The live wire of power supply.Therefore when installing fluorescent lamp, if closing switch accidentally, electric shock accidents may be caused.To eliminate this Class is dangerous, and alternatively, the LED daylight lamp 1 of the present embodiment may also include the live wire for being serially connected in external ac power source and positive pole draws Removable connector between pin 130A, when installing LED daylight lamp, the connector be removed with cut off positive pole pin 130A with The electrical connection of live wire.

Fig. 5 A and 5B are respectively the wiring diagram of the LED daylight lamp of common fluorescent lamp and embodiment illustrated in fig. 4.

Compared with Fig. 5 A, under the mode of connection shown in Fig. 5 B, Inductive ballast 2 is shorted, and starter 3 is replaced by removable Except connector 50, and the pin 310A of LED daylight lamp 1 is electrically connected to the fire of external ac power source through removable connector 50 Line L, pin 310B are electrically connected to zero line N, the pin 410A and 410B of end cap 40 then no longer electrically to be connected with external ac power source Connect.From Fig. 5 B, when in the loop where removable connector 50 is serially connected in pin 310A and live wire L and switching K closures When, external ac power source could power to LED daylight lamp 1.And when removable connector 50 is removed, even if switch K closures, Without electricity at positive pole pin 130A, electric shock hidden danger is thereby eliminated.

When the LED daylight lamp of the present embodiment to be installed to the lamp socket of common fluorescent lamp, removable connector 50 can use The form of similar starter, it includes the Interface Terminal to match with the starter socket on Inductive ballast, correspondingly, inductance Then the requirement of annexation is attached the internal wiring terminal of ballast 2 according to Fig. 5 B, thus can be by inductance town Removable connector is plugged to form or cut off the electrical connection between pin 310A and live wire L on stream device.

It is pointed out that although in the embodiment shown in fig. 4, the pin for being connected electrically to live wire and zero line is set On same end cap, but this is not required.Actually the pin for being connected electrically to live wire and zero line is separately positioned on not It is on same end cap and feasible, it is above-mentioned to set when the positive pole pin and negative pin of LED drive power are located at the both ends of substrate It is beneficial to put.

Fig. 6 is the decomposing schematic representation according to the LED daylight lamp of a further embodiment of the present invention.

The LED daylight lamp of the present embodiment is compared with shown in Fig. 4, and difference essentially consists in end cover structure, below to this It is further described.For other side, the present embodiment can use the various features of previous embodiment, therefore no longer be described in detail.

LED daylight lamp 1 shown in Fig. 6 equally includes LED drive power 10, body 20 and end cap 30,40.In the present embodiment In, end cap 30 and 40 uses split-type structural.End cap 30 includes sleeve 30A and cover plate 30B, and its middle sleeve 30A can be socketed in pipe On the outer wall of body 20, cover plate 30B can sealing sleeve 30A, thereon set through cover plate pin 310A, 310B, the two pins On the one hand can weld together respectively with positive pole pin 130A and negative pin 130B, on the other hand can be electric with external communication respectively Live wire and the zero line electrical connection in source.End cap 40 includes the sleeve 40A that can be socketed on the outer wall of body 20 and can sealing sleeve A pair of pin 410A, 410B for running through cover plate are set on 40A cover plate 40B, cover plate 40B.

Although having showed and having discussed some aspects of the present invention, those skilled in the art should realize Arrive：Above-mentioned aspect can be changed under conditions of without departing substantially from the principle of the invention and spirit, therefore the scope of the present invention will Limited by claim and equivalent content.

Claims (8)

1. a kind of LED drive power of integrated optical source, including：

Strip substrate；

It is multiple to be arranged on the strip substrate the simultaneously LED unit of series coupled；And

Drive circuit module, it is disposed in the one or both ends of the strip substrate and is electrically connected with the LED unit,

Wherein, the drive circuit module includes：

Bridge rectifier filter unit；

DC-DC boosting inverter units, including inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, the inductor And switching diode is connected between the bridge rectifier filter unit and the LED unit, the drain electrode of the metal-oxide-semiconductor electrically connects It is connected between the positive pole of the inductor and switching diode, grid and the output end of the PWM controller are electrically connected；And

Feedback unit, including transistor, its base stage are electrically connected that to flow through LED mono- to sense to the loop of the LED unit The fluctuation of the electric current and/or voltage of member, colelctor electrode are electrically connected to the control terminal of the PWM controller and through large bulk capacitance Device is grounded, so that the response of feedback control loop slows down.

2. LED drive power as claimed in claim 1, wherein, the PWM controller and metal-oxide-semiconductor are integrated in same integrate In circuit chip.

3. LED drive power as claimed in claim 1, wherein, the PWM controller, metal-oxide-semiconductor and transistor are integrated In same IC chip.

4. LED drive power as claimed in claim 1, wherein, the drive circuit module also includes being arranged on the strip The positive pole pin and negative pin of same one end of substrate, it is electrically connected respectively with the live wire and zero line of external ac power source.

5. a kind of LED daylight lamp, including：

Body；

End cap positioned at the body both ends, it is provided with the pin of adaptation daylight lamp holder；

LED drive power, including：

It is fixed on the strip substrate of the tubular body；

It is multiple to be arranged on the strip substrate the simultaneously LED unit of series coupled；

Drive circuit module, its be disposed in the one or both ends of the strip substrate and with the LED unit and it is described insert Pin is electrically connected,

Wherein, the drive circuit module includes：

Bridge rectifier filter unit；

DC-DC boosting inverter units, including inductor, switching diode, PWM controller and metal-oxide-semiconductor, wherein, the inductor And switching diode is connected between the bridge rectifier filter unit and LED load, the drain electrode of the metal-oxide-semiconductor is electrically connected to Between the positive pole of the inductor and switching diode, grid and the output end of the PWM controller are electrically connected；And

Feedback unit, including transistor, its base stage are electrically connected that to flow through LED mono- to sense to the loop of the LED unit The fluctuation of the electric current and/or voltage of member, colelctor electrode are electrically connected to the control terminal of the PWM controller and through large bulk capacitance Device is grounded, so that the response of feedback control loop slows down.

6. LED daylight lamp as claimed in claim 5, wherein, the drive circuit module also includes being arranged on the strip base The positive pole pin and negative pin of same one end of plate, it is electric with the live wire and zero line of external ac power source respectively through the pin Connection.

7. LED daylight lamp as claimed in claim 6, wherein, further comprise the live wire for being adapted to be attached to external ac power source With the removable connector between the positive pole pin.

8. LED daylight lamp as claimed in claim 7, wherein, the removable connector includes Interface Terminal, the interface end Son is adapted to the starter socket on Inductive ballast.