CN202634812U

CN202634812U - Light-adjustable LED lighting lamp circuit

Info

Publication number: CN202634812U
Application number: CN 201220240878
Authority: CN
Inventors: 严圣军; 沈春辉
Original assignee: Tianying (shanghai) Photoelectric Technology Co Ltd
Current assignee: Tianying (shanghai) Photoelectric Technology Co Ltd
Priority date: 2012-05-24
Filing date: 2012-05-24
Publication date: 2012-12-26
Anticipated expiration: 2022-05-24

Abstract

The utility model discloses a light-adjustable LED lighting circuit for the technical field of LED lighting. The circuit comprises an AC-DC rectifier circuit, a constant-current control loop and a plurality of LED modules, wherein the AC-DC rectifier circuit comprises an AC input end, an overcurrent protective device and a full-bridge rectifier circuit BD1 for converting an input power frequency AC into pulse DC; the constant current control loop comprises a bias circuit and a pulse constant current control circuit; and each LED module comprises a high-voltage LED and a COB (Cache On Board) packaging LED or a self-build LED module. According to the utility model, the input AC is converted into a frequency-doubled pulse DC, the pulse DC is converted into segmented DC constant current to output, and the segmented DC constant current is stabilized in a stable DC constant current to output, so that the light-adjustable scheme, which omits magnetic components, electrolysis and driving cavity, and is provided with high PF (Pulse Frequency), low harmonic wave and long service life, of an LED lighting lamp is achieved.

Description

A kind of Dimmable LED lighting lamp circuit

Technical field

The utility model relates to the LED lighting technical field, relates in particular to a kind of Dimmable LED lighting lamp circuit.

Background technology

LED (light-emitting diode; Lighting Emitting Diode) is a kind of semiconductor solid luminescence device; It is to utilize the solid semiconductor chip as luminescent material, in semiconductor, through charge carrier compound energy of emitting surplus takes place and causes photo emissions, and is directly luminous.The LED illuminating product utilizes LED as the produced ligthing paraphernalia of light source exactly, does not have ultraviolet ray and infrared ray in the spectrum of led light source, and heat is low and do not have a stroboscopic; Radiationless; And discarded object is recyclable, does not pollute not contain mercury element, cold light source; Can safe touch, therefore belong to typical green illumination light source; In addition, LED has advantages such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.

Led light source adopts DC driven, and super low-power consumption (0.03 watt-1 watt of single tube) electric light power conversion rate is near 100%, and is more energy-conservation more than 80% than conventional light source.Led light source belongs to the solid cold light source, and epoxy encapsulation does not have loosening part yet in the lamp body, does not exist filament light-emitting to be prone to shortcomings such as burning, heat deposition, light decay, so can reach 50,000 to 100,000 hours useful life, and is longer more than 10 times than the conventional light source life-span.

Just because of LED all adopts DC driven at present; Therefore between civil power and LED, need add a constant-current driving power supply, convert electric main the direct current of suitable LED to, because the existence of this constant-current driving power supply; An actuator chamber of placing this constant-current driving power supply must be provided in the LED light fixture; The radiator of LED light fixture must be the column of hollow like this, and owing to receive the criteria limit of lamp outer casing and outward appearance, the radiator of LED light fixture all is bigger and heavy at present; Thereby whole light fixture can weigh much than conventional lamp; Cause installation reliability and fail safe to be had a strong impact on, and the light-emitting area of light fixture also can than conventional lamp become littler, above drawbacks limit popularizing and the application scenario of LED light fixture.In addition, because this constant-current driving power supply exists a large amount of electrochemical capacitors and magnetic elements to improve harmonic wave and electromagnetic compatibility problem, so often cause the whole LED lamp life to shorten, Electro Magnetic Compatibility is relatively poor.And this constant-current driving power supply generally is positioned in the actuator chamber, and heater members can't directly contact with radiator, causes the heat-sinking capability of this constant-current driving power supply relatively poor, makes the reliability variation of light fixture indirectly, lifetime, deterioration of efficiency.

The utility model content

The purpose of the utility model embodiment is to the above-mentioned defective of existing LED light fixture technology, and a kind of LED of being used for lighting lamp circuit is provided, and is transformed into the Rectified alternating current of frequency multiplication through the alternating current with input; The direct current continuous current that Rectified alternating current is converted to segmentation is exported, and the direct current continuous current of segmentation is constant in a stable direct current constant current output, realizes the no magnetic cell to the LED lighting; No electrolysis; No actuator chamber, little radiator, high PF; Low harmonic wave, high life tunable optical design for scheme.

In order to realize aforementioned utility model purpose, a kind of Dimmable LED lighting lamp circuit that the utility model proposes is realized through following technical scheme:

A kind of Dimmable LED lighting lamp circuit is characterized in that, said circuit comprises and connects the AC-DC commutating circuit successively, constant current control loop and LED module, wherein:

Said AC-DC commutating circuit comprise successively the ac input end that connects, protection overcurrent device, will import the full bridge rectifier BD1 that industrial-frequency alternating current converts Rectified alternating current into;

The said constant current control loop section of comprising biasing circuit and pulse constant current control circuit;

Said pulse constant current control circuit adopts chip U2; The section biasing circuit of said constant current control loop comprises biasing resistor R11, also comprises the constant current limiting resistance R4, R5, the R6 that are connected respectively with said chip U2; Said LED module comprises LED module 1; The output of said full bridge rectifier BD1 connects the input of said resistance 11 and the input of said LED module 1, and the output of said resistance 11 connects the PU1 of chip U2; The output of said LED module 1 connects any pin among the pin TAP1, TAP2, TAP3 of said chip U2; The input of said resistance R 4 connects the pin SENSE1 of said chip U2; The output of said resistance R 4 connects the input of resistance R 5 and the pin SENSE2 of said chip U2; The output of said resistance R 5 connects the input of said resistance R 6 and the pin SENSE3 of said chip U2, the output head grounding of said resistance R 6.

Further, the section biasing circuit of said constant current control loop also comprises biasing resistor R12, and said LED module also comprises LED module 2; The output of said LED module 1 also connects the input of said LED module 2, the input of said resistance R 12; The output of said resistance R 12 connects the pin PU2 of said chip U2; The output of said LED module 2 connects any pin in remaining two pins among the pin TAP1, TAP2, TAP3 of said chip U2.

Further, the section biasing circuit of said constant current control loop also comprises biasing resistor R13, and said LED module also comprises LED module 3; The output of said LED module 2 also connects the input of said LED module 3, the input of said resistance R 13; The output of said resistance R 13 connects the pin PU3 of said chip U2; The output of said LED module 3 connects the surplus next pin among the pin TAP1, TAP2, TAP3 of said chip U2.

Compared with prior art, the LED structure of the lighting lamp of the utility model embodiment is simple relatively, nonmagnetic components and parts, and electromagnetic interference is few, and more environmental protection is safer; No electrolysis, lamp life is high, avoids electrolyte contamination, more environmental protection; No traditional constant-current driving power supply has saved driver, therefore, on housing, does not just need actuator chamber, thereby helps heat radiation.High PF (0.99), low harmonic wave reduces the electric network reactive-load loss, and is little to Disturbance in Power Net; Employing high voltage-small current technology reduces line loss, reduces the light fixture heating, promotes efficient, improves the life-span; Driving is integrated with light source, and product modular is convenient to automated production, enhances productivity and the product versatility; Compatible silicon controlled light modulation, directly being promoted by the traditional illumination system replacement is the LED illuminator, it is convenient to change, economy, lamp luminescence face and lighting angle and whole light fixture freedom of design in configuration are big, more can be fit to various illumination occasions.

Description of drawings

Through the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.

Fig. 1 is the circuit diagram of the LED lamp of the utility model;

Fig. 2 is the industrial-frequency alternating current oscillogram of the utility model embodiment through the input of extraneous controllable silicon light modulation;

Fig. 3 is the Rectified alternating current oscillogram of the utility model embodiment frequency multiplication that rectification obtains through full-bridge circuit;

Three sections current waveform figures that Fig. 4 is obtained by pulse constant current control loop 2 for the utility model embodiment;

Fig. 5 is the current waveform figure of the utility model embodiment PWM light modulation;

Fig. 6 is the structural representation of traditional LED bulb lamp;

Fig. 7 is the structure comparison diagram of the bulb lamp of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further explain.

As shown in Figure 1, at the Dimmable LED lighting lamp circuit of the utility model, be applicable to the LED illuminating lamp that 10W is above.This circuit has no electrolysis, no actuator chamber, and little radiator, high PF, low harmonic wave, the advantage of high life tunable optical, it comprises AC-DC commutating circuit 1, constant current control loop 2 and LED module, wherein:

Said AC-DC commutating circuit 1 comprises that successively the device R 7, one of an ac input end AC_L&AC_N who connects, a protection overcurrent will import the full bridge rectifier BD1 that industrial-frequency alternating current converts Rectified alternating current into;

Constant current control loop 2 section of comprising biasing circuits and chip U2 form, its stage casing biasing circuit section of comprising biasing resistor R11, R12, R13 and constant current limiting resistance R4, R5, R6; The model of chip U2 is EXC100.

In the present embodiment, the LED module also comprises 3 LED modules, LED module 1, LED module 2, LED module 3, and said LED module can be a high-voltage LED, can be the COB packaged LED, also can be the LED module of building voluntarily.

Wherein, the ac input end AC_L&AC_N of AC-DC commutating circuit 1 can be the L&N ac input end of light fixture lamp holder or specific light fixture.The device R 7 of the protection overcurrent of AC-DC commutating circuit 1 can be fuse; Insurance resistance; Piezo-resistance or other protective devices; The input of the device R 7 of said protection overcurrent connects the AC_L of said ac input end AC_L&AC_N, and its output connects the input of said full bridge rectifier BD1.And the input of the full bridge rectifier BD1 of AC-DC commutating circuit 1 connects the output of the device R 7 of said protection overcurrent, and its output connects said section biasing resistor R11, and said LED module 1.

For constant current control loop 2, wherein, the input of section biasing resistor R11 connects the output of said full bridge rectifier BD1, and its output connects the pin PU1 of said chip U2; The input of the section biasing resistor R12 of constant current control loop 2 connects the output of said LED module 1, and its output connects the pin PU2 of said chip U2; The input of the section biasing resistor R13 of constant current control loop 2 connects the output of said LED module 2, and its output connects the pin PU3 of said chip U2.

The input of the constant current limiting resistance R4 of constant current control loop 2 connects the pin SENSE1 of said chip U2, and its output connects the input of said constant current limiting resistance R5; The input of the constant current limiting resistance R5 of constant current control loop 2 connects the pin SENSE2 of said chip U2, and its output connects the input of said constant current limiting resistance R6; The input of the constant current limiting resistance R6 of constant current control loop 2 connects the pin SENSE3 of said chip U2, and its output connects the pin GND of said chip U2 and the output of said full bridge rectifier BD1.

For the LED module; LED module 1 can be single high-voltage LED or COB packaged LED module or a plurality of low-power LEDs; The combination of high-voltage LED and COB packaged LED; The input of LED module 1 connects the output of said full bridge rectifier BD1, and its output connects the pin TAP1 of said chip U2; LED module 2 can be single high-voltage LED or COB packaged LED module or a plurality of low-power LEDs; The combination of high-voltage LED and COB packaged LED; The input of LED module 2 connects the output of said LED module 1, and its output connects the pin TAP2 of said chip U2; LED module 3 can be single high-voltage LED or COB packaged LED module or a plurality of low-power LEDs; The combination of high-voltage LED and COB packaged LED; The input of said LED module 3 connects the output of said LED module 2, and its output connects the pin TAP3 of said chip U2.

Owing to used above technical scheme, compared with prior art, this programme is transformed into the alternating current of input through full bridge rectifier the Rectified alternating current of frequency multiplication; Convert Rectified alternating current to three sections direct current continuous current outputs through DC/DC pulse constant current circuit, through the pulse constant current control circuit that three sections direct current continuous currents are constant in a stable direct current constant current output, realized no magnetic cell to the LED lighting; No electrolysis; No actuator chamber, little radiator, high PF; Low harmonic wave, the design of high life.

Simultaneously; Constitute the control that constant current control loop 2 is realized the LED constant current by the linear element device; So the controllable silicon light modulation system in the complete compatible traditional lighting makes the LED light fixture higher as the advantage of replacement light source, also reduces the capital input that light source updates simultaneously greatly.

In addition; Because this scheme realizes that the components and parts of constant current control are few; And no electrolytic capacitor; And constitute constant current control loop 2 by the linear element device fully and realize that the control event of LED constant current need not circuit of power factor correction and filter circuit promotes PF and reduces harmonic wave, directly realize high PF, low harmonic wave.Therefore fully can be with the direct paster of components and parts of AC-DC commutating circuit 1 and constant current control loop 2 in the light source aluminium base; Thereby realized the design of no actuator chamber, therefore, no traditional constant-current driving power supply in the scheme; Saved driver; Therefore, on housing, just do not need actuator chamber, thereby help heat radiation.

So the radiator of LED can be designed to solid starlike radiant body, strengthen greatly spreading heat energy power, so the ten minutes that the radiator of LED light fixture can design is small and exquisite, accomplished the realization of little radiator light fixture.In addition, because the shape of radiator can be designed to different shape and technology not being activated the restriction in chamber, improve the aesthetics of light fixture.

A following embodiment mainly is used for explaining and adopts the above scheme of 10W to realize that 10W A19 does not have magnetic cell, no electrolysis, no actuator chamber, little radiator, high PF, low harmonic wave, the scheme of the wide smooth bulb lamp of high life Dimmable LED.

The utility model technical scheme is transformed into the alternating current of input through full bridge rectifier the Rectified alternating current of frequency multiplication; Convert Rectified alternating current to three sections direct current continuous current outputs through DC/DC pulse constant current circuit; Through the pulse constant current control circuit that three sections direct current continuous currents are constant in a stable direct current constant current output, export through this constant direct current constant current then and drive high voltage-small current LED module, thereby realized that 10WA19 does not have magnetic cell; No electrolysis; High PF, low harmonic wave, the design of high life.

In addition, the utility model technical scheme makes no matter variation or the variation of input voltage and the influence that electrical network impacts of LED forward voltage drop can both come driving LED with accurate stable electric current.The component number of Control current is few, and no electrolytic capacitor and magnetic elements, and all devices all can be affixed on the light source board, so also can heat be left through the light source aluminium base, improves the life-span and the luminous efficiency of whole light fixture greatly.

Simultaneously, owing to constitute the control that constant current control loop 2 is realized the LED constant current by the linear element device fully in this scheme, so the controllable silicon light modulation system in the complete compatible traditional lighting.

In addition; Because this scheme realizes that the components and parts of constant current control are few; And no electrolytic capacitor; And constitute constant current control loop 2 by the linear element device fully and realize that the control event of LED constant current need not circuit of power factor correction and filter circuit promotes PF and reduces harmonic wave, directly realize high PF, low harmonic wave.Therefore the existing direct paster of components and parts with AC-DC commutating circuit 1 and constant current control loop 2 is in the light source aluminium base, thereby realized the design of no actuator chamber.

Below in conjunction with the controllable silicon light modulation system detailed introduction is carried out in the each several part work of 10W A19 bulb lamp.

As shown in Figure 2; The industrial-frequency alternating current of the extraneous phase dimming of process (such as controllable silicon light modulation) is by ac input end AC_L&AC_N; It is the input of E27 screw cap; Dash area is represented by the voltage segment that is not transfused to such as controllable silicon cutting among the figure, and wherein a is the angle of flow (0≤a≤π) of phase dimming.

Full bridge rectifier BD1 will import industrial-frequency alternating current and convert Rectified alternating current into, and will be as shown in Figure 3, and light modulation information is retained in the Rectified alternating current by its output.

Constant current control loop 2 converts pulsating dc voltage into the high frequency pulse dc continuous current of segmentation.In theory; If convert pulsating dc voltage into four sections or the high frequency pulse dc continuous current of multistage more, power-efficient can be higher, but can increase the complexity of circuit; Show according to actual test data; Three sections shuntings had both met the requirement of most of light fixture conversion efficiency, and circuit is not again very complicated, is more satisfactory segmented mode.In the present embodiment, constant current control loop 2 is with three sections pulse direct current continuous currents of the corresponding three sections different size of current of pulsating dc voltage conversion, and is as shown in Figure 4.

The pulse direct current continuous current makes LED luminous, thereby has realized the electric light power conversion through high voltage-small current LED module.

And the pulse current of dash area in shown in Figure 4, the voltage segment that is not transfused to of quilt such as controllable silicon cutting in the light modulation information just, thus realized compatible silicon controlled light adjusting system.

In addition, if when an external pwm signal input section biasing circuit R1, R2, R3, three sections high frequency pulse dc continuous currents originally just become the PWM electric current shown in the green block diagram, like Fig. 5, thereby realize external pwm signal sectional dimming.Realized the compatibility of the multiple light-modulating mode of light fixture.

Chip U1 in the constant current control loop 2 and constant current restricting circuits R4, R5, R6 are the control loops of accurately controlling each section constant current output current steady state value; Accept three sections high frequency pulse dc continuous currents of input; Current constant a stable direct current constant current output, is made that three sections electric current overlaid waveforms are as shown in Figure 5.Make like this phase angle of current waveform follow the phase angle of voltage waveform all the time fully, make and resistive load of the similar one-tenth of LED light fixture realize Linear Driving LED that power factor is substantially equal to 1, and is as shown in Figure 5.

Below all be that this 10W A19 does not have magnetic cell, no electrolysis, no actuator chamber; Little radiator, high PF, low harmonic wave; The explanation of the electric part of the wide smooth bulb lamp scheme of high life Dimmable LED shows the comparison diagram of traditional bulb lamp and the utility model embodiment bulb lamp respectively like Fig. 6 and Fig. 7, is example with the bulb lamp; Its structure aspects is described, further the advantage of outstanding this scheme.

As shown in Figure 6; Traditional bulb lamp tool need be provided with actuator chamber 102 at light source panel 101; The accounted for most space at light source panel 101 back sides of actuator chamber 102, this makes to have only a spot of space to supply with radiator 103, thereby makes radiating effect have a greatly reduced quality.

And as shown in Figure 7, the bulb lamp tool of the utility model embodiment, just the direct paster of components and parts of AC-DC commutating circuit 1 and constant current control loop 2 is in the light source aluminium base; Be that light source and chip can be integrated on the panel; Form light source and chip panel 104, realized the design of no actuator chamber, only need a very little lead channels 105 at the light source and chip panel 104 back sides; This just makes nearly all space at the light source and chip panel 104 back sides leave radiator 103 for; And radiator 103 can be designed to the starlike radiation with no actuator chamber, and this has not only increased the thermal radiation area significantly, has also saved the consumption of heat sink material greatly; Thereby alleviate light fixture weight, and reduce cost.

In addition; In order further to strengthen the heat-sinking capability of light fixture, adopt the form of aluminium external pressure heat-conducting plastic to be shaped to this 10W A19 LED bulb lamp radiator, further increase the external thermal radiation capability of light fixture; Alleviate light fixture weight; Also make lamp outer casing adopt insulating material to realize that the fail safe aspect improves greatly fully, stop electric leakage danger.Owing to there has not been actuator chamber, and radiator adopts starlike irradiation structure, adds the very strong heat-conducting plastic of thermal radiation capability as outer surface, and therefore, it is very small and exquisite that this radiator can design, and realized the requirement of little radiator light fixture.

Under the very small and exquisite prerequisite that radiator can be done, it is bigger that the lamp luminescence face of this 10W A19 LED bulb lamp scheme just can design, and near a spherical shape, the exiting surface of LED bulb lamp has been realized the designing requirement of wide light near traditional incandescent lamp.

In addition, the utility model can be widely used in the LED lighting of 10 ~ 50W, like the LED bulb lamp, and LED candle lamp, LED fluorescent lamp, LED Down lamp, LED shot-light, LED ceiling light, LED Ceiling light and LED Panel light or the like.No magnetic cell, no electrolysis, no actuator chamber, little radiator, high PF, low harmonic wave, high life tunable optical (multiple dimming mode is compatible).Power factor is up to 0.99, most effectively reaches 96%, harmonic wave 10% ~ 25%.

The utility model one of ordinary skill in the art be appreciated that; The above embodiment of the utility model is merely one of preferred embodiment of the utility model; Be the length restriction; Here can not all execution modes of particularize, any enforcement that can embody the utility model claim technical scheme is all in the protection range of the utility model.

It should be noted that; Above content is the further explain that combines concrete execution mode that the utility model is done; The embodiment that can not assert the utility model only limits to this; Under the above-mentioned guidance of the utility model, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improve or distortion drops in the protection range of the utility model.

Claims

1. a Dimmable LED lighting lamp circuit is characterized in that, said circuit comprises and connects the AC-DC commutating circuit successively, constant current control loop and LED module, wherein:

Said pulse constant current control circuit adopts chip U2; The section biasing circuit of said constant current control loop comprises biasing resistor R11, also comprises the constant current limiting resistance R4, R5, the R6 that are connected respectively with said chip U2; Said LED module comprises LED module 1;

The output of said full bridge rectifier BD1 connects the input of said resistance 11 and the input of said LED module 1, and the output of said resistance 11 connects the PU1 of chip U2;

The output of said LED module 1 connects any pin among the pin TAP1, TAP2, TAP3 of said chip U2;

The input of said resistance R 4 connects the pin SENSE1 of said chip U2; The output of said resistance R 4 connects the input of resistance R 5 and the pin SENSE2 of said chip U2; The output of said resistance R 5 connects the input of said resistance R 6 and the pin SENSE3 of said chip U2, the output head grounding of said resistance R 6.

2. Dimmable LED lighting lamp circuit as claimed in claim 1 is characterized in that, the ac input end AC_L&AC_N of said AC-DC commutating circuit comprises the L&N ac input end of light fixture lamp holder or light fixture.

3. the LED lighting lamp circuit of tunable optical according to claim 1 is characterized in that: the section biasing circuit of said constant current control loop also comprises biasing resistor R12, and said LED module also comprises LED module 2;

The output of said LED module 1 also connects the input of said LED module 2, the input of said resistance R 12; The output of said resistance R 12 connects the pin PU2 of said chip U2; The output of said LED module 2 connects any pin in remaining two pins among the pin TAP1, TAP2, TAP3 of said chip U2.

4. the LED lighting lamp circuit of tunable optical according to claim 3 is characterized in that: the section biasing circuit of said constant current control loop also comprises biasing resistor R13, and said LED module also comprises LED module 3;

The output of said LED module 2 also connects the input of said LED module 3, the input of said resistance R 13; The output of said resistance R 13 connects the pin PU3 of said chip U2; The output of said LED module 3 connects the remaining pin among the pin TAP1, TAP2, TAP3 of said chip U2.

5. Dimmable LED lighting lamp circuit as claimed in claim 1; It is characterized in that; The device of said protection overcurrent is fuse or insurance resistance or piezo-resistance; Its input connects the AC_L of said ac input end AC_L&AC_N, and its output connects the input of said full bridge rectifier BD1.

6. LED lighting lamp circuit as claimed in claim 4 is characterized in that, said LED module 1, LED module 2, LED module 3 comprise high-voltage LED, COB packaged LED or the LED module of building voluntarily.