CN203814005U

CN203814005U - LED light modulation circuit with power-on trigger lock memory function

Info

Publication number: CN203814005U
Application number: CN201420133548.9U
Authority: CN
Inventors: 赵建明; 何继明; 周伟; 张光富; 邓宏; 廖智; 李建黎; 腾飞
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2014-03-24
Filing date: 2014-03-24
Publication date: 2014-09-03
Anticipated expiration: 2024-03-24

Abstract

The utility model discloses an LED light modulation circuit with a power-on trigger lock memory function. The circuit comprises at least two optical modules in series connection with LED lamp sets, a current conversion module used for converting the external commercial power to a direct current needed by the LED lamp sets, an LED intelligent light modulation module used for converting an on-off single of a master switch to a trigger signal to control the optical module, and a power supply maintenance module used for maintaining the LED intelligent light modulation module to continue to operate from the power-off of the master switch to the power-on next time, wherein the external commercial power is connected to the current signal input end of the current conversion module through the master switch, and the current signal output end of the current conversion module is connected to the optical module. The power supply input end of the LED intelligent light modulation module is connected to the current output end of the current conversion module, and the control signal output end of the LED intelligent light modulation module is connected to the optical module. The circuit is simple in structure and convenient to achieve, enables the LED light modulation module to remain the normal operation state during the light modulation process, and achieves accurate light modulation. The circuit is suitable for various LED illuminating lamps requiring light modulation operation.

Description

Have and open the LED light adjusting circuit that triggers locking memory function

Technical field

The utility model belongs to light adjusting circuit field, specifically a kind of LED light adjusting circuit with unlatching triggering locking memory function.

Background technology

It is high that LED light source has luminous efficiency, long service life, durable, adopt low-voltage and low current to drive, safe and reliable, energy saving, environmental protection, shockproof, waterproof, volume is little, photocontrol is convenient, luminous color is abundant, colour gamut is wide, light beam is concentrated, and fast response time, can be intelligent, the series of advantages such as networking control and adjusting, that any light source was incomparable in the past, therefore LED light source becomes the develop actively direction of various countries' illuminating product, (for example existing house ornamentation is with in LED light fixture particularly at family expenses lighting field, to have wide prospect, mostly be provided with the multistage light modulation that brightness or color are different, to adapt to different occasion demands).

And LED illumination at present has two kinds of conventional dimming controlling methods, the first LED dimming controlling method is exactly to adopt simulation dimming controlling method, under simulation brightness adjustment control, by regulating the forward operating current of LED to realize the brightness adjustment control of LED, brightness adjustment control scope can reach 10: 1.The second LED dimming controlling method is exactly the brightness adjustment control method that adopts numeral or be called PWM, PWM brightness adjustment control method is to be greater than the switch frequency of 100 Hz, the pulse duty factor that changes LED drive current with the method for pulse-width modulation realizes the brightness adjustment control of LED, and selecting and being greater than 100Hz switch dimming control frequency is mainly for fear of human eye perceives to light modulation scintillation.Above two kinds of light-dimming methods to realize required cost higher, for general family, increased the cost of LED illumination, therefore also limited LED green illumination universal operating speed fast.

Utility model content

In order to solve the above problems, the utility model provides a kind of LED light adjusting circuit of opening triggering locking memory function that has, described dimmer regulates and controls by the folding of different LED lamp group, or the electric current of adjusting whole LED lamp string reaches the object of adjusting light power, circuit is simple, convenient and practical, cost is lower.

For achieving the above object, the technical scheme that the utility model adopts is as follows:

A kind of LED light adjusting circuit with unlatching triggering locking memory function, the light emitting module that comprises at least two serial connection LED lamp groups, for converting outside civil power to LED lamp group required galvanic electric current conversion module, described outside civil power connects the current signal input of electric current conversion module by master switch, the current signal output end of electric current conversion module connects light emitting module, it also comprises the LED intelligent dimming module that the switching signal of master switch is converted to triggering signal and controls LED lamp group in light emitting module, and as power supply, maintain the power supply that LED intelligent dimming module works on and maintain module when master switch is disconnected to period of contact next time, the power input of described LED intelligent dimming module is connected with the current output terminal of electric current conversion module, its control signal output connects light emitting module.

As to restriction of the present utility model: described LED intelligent dimming module comprises the main control unit as control centre, the power end of described main control unit connects electric current conversion module by current processing circuits, and its signal output part connects light emitting module by least one the electronic switch drive circuit arranging.

As to further restriction of the present utility model: described main control unit is CD4013 integrated circuit;

Described power supply maintains the energy-accumulating element that module is included in master switch accumulation of energy when closed, the positive pole of described energy-accumulating element during as power supply connects the power end of CD4013 integrated circuit, also prevent that the first electronic switch that electric current backflow returns current processing circuits from connecting current processing circuits when disconnecting for master switch, the minus earth of energy-accumulating element during as power supply simultaneously.

As the restriction to electronic switch drive circuit: described electronic switch drive circuit comprises the triode as electronic switch, the base stage of described triode connects main control unit by resistance, and collector electrode and emitter are connected respectively current signal input and the current signal output end of one group of LED lamp group.

As the another kind to electronic switch drive circuit, limit: described electronic switch drive circuit comprises constant-current source integrated circuit, the current sample end of described constant-current source integrated circuit connects the control signal output of main control unit, and drive end connects whole light emitting module by comprising that the current conversion circuit of the second electronic switch, transformer drives.

Owing to having adopted above technical scheme, the utility model can reach following technique effect:

(1) the utility model is provided with LED intelligent dimming module, and power supply maintains module, wherein LED intelligent dimming module can convert the switching signal of master switch to the triggering signal of self, and then can send the light on and off that control signal is controlled one group of LED lamp group in light emitting module, or control the luminosity of whole light emitting module, and the power supply that master switch can cut off LED intelligent dimming module while disconnecting because of light modulation, now power supply maintains module can continue as LED intelligent dimming module continuation power supply, on master switch, once guarantee that LED intelligent dimming module works all the time before closure, and then realize LED intelligent dimming module and can adjust light emitting module,

(2) LED intelligent dimming module comprises the main control unit that CD4013 integrated circuit forms, and to make structure of the present utility model simpler, controls also more accurate;

(3) power supply maintains module and adopts energy-accumulating element, in the accumulation of energy of can charging of master switch period of contact, and be disconnected to period of contact next time because of light modulation when master switch, can provide enough electric energy for LED intelligent dimming module, maintain the normal work of LED intelligent dimming module, and the circuit of energy-accumulating element and front end is provided with the first electronic switch, this electronic switch can make energy-accumulating element and front-end circuit disconnect at dimming period, guarantee that energy-accumulating element is only the power supply of LED intelligent control module, has realized the utility model unlatching that light modulation has to LED and has triggered locking memory function;

(4) the electronic switch drive circuit in LED intelligent driver module can adopt triode, and the collector electrode of triode and emitter are connected respectively current input terminal and the current output terminal of one group of LED lamp group, so triode can be controlled luminous group of number of LED lamp group in light emitting module; Can also adopt constant-current source integrated circuit as electronic switch drive circuit, described constant-current source integrated circuit can change the electric current of the whole light emitting module of flowing through, and then can control the brightness of all LED lamp groups in light emitting module, therefore realized and adopted different switching devices, realized different dimming functions.

In sum, the utility model is simple in structure, and it is convenient to realize, and can guarantee that dimming period LED intelligent dimming module is all the time in normal operating conditions, has realized the accurate of light modulation.

The utility model is applicable to the various LED lightings that need to carry out light modulation manipulation.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of the utility model embodiment;

Fig. 2 is the circuit theory diagrams under the use state of the utility model embodiment while controlling two series LED lamp groups;

Fig. 3 is the circuit theory diagrams under the use state of the utility model embodiment while controlling three series LED lamp groups;

Fig. 4 is that the utility model embodiment is for the circuit theory diagrams of the complete bright type LED lamp light adjusting circuit of 5W-30W constant current high power factor low harmonics distortion isolated form.

In figure: 1,1 '-electric current conversion module, the 11-the first first-level filtering wave circuit, 11 '-the second first-level filtering wave circuits, the 12-the first rectifier circuit, 12 '-the second rectifier circuits, 2-LED intelligent dimming module, 21-main control unit, the 22-the first current processing circuits, 22 '-the second current processing circuits, the 23-the first electronic switch drive circuit, 23 '-the second electronic switch drive circuits, 3-light emitting module, 4-power supply maintains module.

Embodiment

a kind of LED light adjusting circuit with unlatching triggering locking memory function of embodiment

The present embodiment is a kind of LED light adjusting circuit of opening triggering locking memory function that has, and as Fig. 1, it comprises:

(1) electric current conversion module 1 and 1 '.

Electric current conversion module 1 can be by the direct current that LED was used for outside 220V alternating current is converted to, because the present embodiment can be realized different dimming effects, therefore, the electric current conversion module 1 of the present embodiment as shown in Figure 2 and Figure 3, comprise: the first first-level filtering wave circuit 11, the first rectifier circuit 12, wherein the first first-level filtering wave circuit 11 consists of the parallel circuits of the first resistance R 1 and the first capacitor C1, and the first 12 of rectifier circuits are the voltage stabilizing bridges consisting of the first diode D1 to the four diode D4.Described the first resistance R 1 is connected one end of 220V alternating current with one end of the first capacitor C1 parallel circuits by master switch K, the other end connects the intermediate node that in the first rectifier bridge, the first diode D1 is connected with the 3rd diode D3, the intermediate node that the second diode D2 is connected with the 4th diode D4 connects the other end of 220V alternating current, the intermediate node that the first diode D1 is connected with the second diode D2, and the intermediate node that is connected with the 4th diode D4 of the 3rd diode D3 is as the output of electric current conversion module 1.

And electric current conversion module 1 in the present embodiment ' structure as shown in Figure 4, comprise the second rectifier circuit 12 that four diode D1 '-D4 ' form ', and the 5th capacitor C5, the 7th resistance R 7, the second first-level filtering wave circuit 11 that the 8th resistance R 8 forms ', the intermediate node that wherein the second rectifier circuit 12 ' middle diode D1 ' is connected with diode D2 ', the intermediate node that diode D3 ' is connected with diode D4 ' connects respectively the two ends that 220V exchanges point, the intermediate node that diode D1 ' is connected with diode D3 ', the intermediate node that diode D2 ' is connected with diode D4 ' respectively as the second rectifier circuit 12 ' output.

The second first-level filtering wave circuit 11 ' in the 5th capacitor C5 be located between the intermediate node and ground that the second rectifier bridge 12 ' middle diode D2 ' is connected with diode D4 ', the two ends of in parallel and the 5th capacitor C5 of series circuit that the 7th resistance R 7 forms with the 8th resistance R 8.

(2) light emitting module 3, the lamp group that adopts a plurality of LED lamps to form.

(3) LED intelligent dimming module 2, this module is for realizing the brightness adjustment control to follow-up LED lamp group.Described LED intelligent dimming module 2 as shown in Figure 2, Figure 3, Figure 4, comprising:

1. main control unit 21, and as the control centre of LED intelligent dimming module, the present embodiment adopts CD4013 integrated circuit of the prior art as main control unit.

2. current processing circuits 22 and 22 '.For the direct current obtaining after electric current conversion module 1 or 1 ' processing is further processed, guarantee for CD4013 integrated circuit provide stable, without assorted direct current.

The current processing circuits 22 of the present embodiment comprises secondary filter circuit, voltage stabilizing circuit, concrete structure is as Fig. 2, shown in Fig. 3: wherein secondary filter circuit comprises the second capacitor C2 and the second resistance R 2, voltage stabilizing circuit comprises the 3rd resistance R 3 and voltage-stabiliser tube DW, described the second capacitor C2 and the second resistance R 2 form parallel circuits, and be serially connected in the two ends of the first rectifier circuit 12, after the series circuit that the 3rd resistance R 3 and voltage-stabiliser tube DW form is connected in parallel on secondary filter circuit, the intermediate node that the 3rd resistance R 3 is connected with voltage-stabiliser tube DW simultaneously connects the three-prong of CD4013 integrated circuit by the 4th capacitor C4.

Current processing circuits 22 ' structure as shown in Figure 4, comprise the 13 resistance R 13, and voltage stabilizing circuit, one end ground connection of described the 13 resistance R 13, the other end connects the cathode output end of electric current conversion modules 1 by the 19 resistance R 19; And voltage stabilizing circuit is the same with the voltage stabilizing circuit in current processing circuits 22, comprise the 3rd resistance R 3 and voltage-stabiliser tube DW, the series circuit that described the 3rd resistance R 3 and voltage-stabiliser tube DW form is connected in parallel on the two ends of the 13 resistance R 13, and the intermediate node that the 3rd resistance R 3 is connected with voltage-stabiliser tube DW simultaneously also connects the three-prong of CD4013 integrated circuit by the 4th capacitor C4.

3. electronic switch drive circuit, the driving signal sending for receiving main control unit 21, and then control LED lamp group.In the present embodiment, according to different control forms, electronic switch drive circuit is divided into the first electronic switch drive circuit 23, and the second electronic switch drive circuit 23 '.Wherein the first electronic switch drive circuit 23 as shown in Figure 2 and Figure 3, mainly containing triode forms, because Fig. 2 is different from the group number of the LED lamp group of Fig. 3 control, the quantity of the triode therefore adopting is also different, two groups of LED lamp groups controlling in Fig. 2, therefore adopt a triode, what in Fig. 3, control is three groups of LED lamp groups, has therefore adopted two triodes, by that analogy, when N group LED lamp group is set, adopt N-1 triode can complete control.

Wherein, in Fig. 2, adopt the first triode Q1, the base stage of described the first triode Q1 connects the first pin of CD4013 integrated circuit by the 5th resistance R 5, collector electrode connects the current signal input of second group of LED lamp group in light emitting module 3, and emitter connects the current signal output end of second group of LED lamp group in light emitting module 3.Specific works principle is: master switch K is closed under normal circumstances, Triggerless flows to the three-prong of CD4013 integrated circuit, therefore two kinds of LED lamp groups of light emitting module 3 are all luminous, and when there is personnel's light modulation outside, first can disconnect master switch K, now the three-prong of CD4013 integrated circuit is received triggering signal, output drive signal is given the first triode Q1, make the first triode Q1 conducting, be about to the short circuit of second group of LED lamp group, when master switch K is again closed, only make first group of LED lamp group luminous, complete light modulation action.

And in Fig. 3, be provided with the second triode Q2 and two electronic switches of the 3rd triode Q3, wherein the base stage of the second triode Q2 is by the first pin of resistance R 5 ' connection CD4013 integrated circuit, collector electrode connects the current signal input of second group of LED lamp group in light emitting module 3, and emitter connects the current signal output end of second group of LED lamp group in light emitting module 3; The base stage of the 3rd triode Q3 connects the tenth three-prong of CD4013 integrated circuit by the 6th resistance R 6, collector electrode connects the current signal input of the 3rd group of LED lamp group in light emitting module 3, and emitter connects the current signal output end of the 3rd group of LED lamp group in light emitting module 3.

Specific works principle is: master switch K is closed under normal circumstances, Triggerless flows to the three-prong of CD4013 integrated circuit, therefore two kinds of LED lamp groups of light emitting module 3 are all luminous, and when there is personnel's light modulation outside, first can disconnect master switch K, now the three-prong of CD4013 integrated circuit is received triggering signal, output drive signal is given the second triode Q2, the second triode Q2 conducting, be about to the short circuit of second group of LED lamp group, when master switch K is again closed, only make first group of LED lamp group and the 3rd group of LED lamp group luminous; Again during light modulation, need to again disconnect master switch K, the three-prong of CD4013 integrated circuit is received triggering signal again, output drive signal is given the 3rd triode Q3, the 3rd triode Q3 conducting, is about to the short circuit of the 3rd group of LED lamp group, when master switch K is again closed, only make first group of LED lamp group and second group of LED lamp group luminous, complete light modulation action.

The second resistance switch drive circuit 23 ' as shown in Figure 4: comprise constant-current source integrated circuit PT4209, the current sample end CS of described constant-current source integrated circuit PT4209 connects the collector electrode of the first power tube T1 by the 15 resistance R 15, the grounded emitter of the first power tube T1, base stage connects the tenth three-prong of CD4013 integrated circuit by the 14 resistance R 14, the current sample end CS of constant-current source integrated circuit PT4209 also connects the collector electrode of the second power tube T2 by the 17 resistance R 17 simultaneously, the grounded emitter of the second power tube T2, base stage connects the first pin of CD4013 integrated circuit by the 16 resistance R 16.In addition the current sample end CS of constant-current source integrated circuit PT4209, also by the series circuit ground connection of 18 resistance R 18 and the 9th capacitor C9, is parallel with controlling resistance R at the two ends of the 9th capacitor C9 _cS.The drive end DRV of constant-current source integrated circuit PT4209 connects the grid of field effect transistor M1, an end points of the former limit input of the drain electrode connection transformer T of field effect transistor M1, and source electrode is by controlling resistance R _cSground connection.And another end points of the former limit of transformer T input connect the second rectifier circuit 12 ' cathode output end, at the two ends of the former limit of transformer T input, be parallel with the series circuit that the 7th capacitor C7 and the 6th diode D6 form, at the two ends of the 7th capacitor C7, be parallel with the 11 resistance R 11, between two end points of the secondary output of transformer T, be connected in series the LED lamp group of light emitting module 4, before LED lamp group, be parallel with the parallel circuits that the 8th capacitor C8 and the 12 resistance R 12 form.

The power end VCC of constant-current source integrated circuit PT4209 connects the cathode output end of electric current conversion module 1 by the 19 resistance R 19, simultaneously also by the 6th capacitor C6 ground connection, also by the series circuit ground connection of the 7th diode D7 and inductance coil L1, the two ends of inductance coil L1 are parallel with the series circuit of the 9th resistance R 9, the tenth resistance R 10 formations simultaneously.

The VINS end of constant-current source integrated circuit PT4209 connects the intermediate node of the series circuit of the 7th resistance R 7 and the 8th resistance R 8

The COMP end of constant-current source integrated circuit PT4209 is by the tenth capacitor C10 ground connection; Earth terminal GND is ground connection also; DET end connects the intermediate node of the 9th resistance R 9 and the tenth resistance R 10 series circuits.

The specific works principle that the light adjusting circuit of the second electronic switch driver module is set is: by embedding the output pulse of CD4013 integrated circuit, and according to different level output combinations, control the feedback level gain of controlling resistance Rcs current sampling level, and send this information to constant-current source integrated circuit PT4209, thereby adjusted LED lamp current, realized the function of the lamp group brightness that regulates and controls whole LED.

(4) power supply maintains module 4, owing to carrying out light modulation when action, need to disconnect master switch K a period of time, and master switch K is controlling the power supply of whole circuit, therefore, in order to guarantee to disconnect after master switch K, main control unit 21 is still charged, can control the work of follow-up electronic switch drive circuit, the present embodiment is provided with power supply and maintains module 4, described power supply maintains the structure of module 4 as Fig. 2, Fig. 3, shown in Fig. 4, the energy-accumulating element of accumulation of energy while being included in the closed K of master switch, the present embodiment adopts energy storage capacitor C3 and the 4th resistance R 4, the positive pole of described energy storage capacitor C3 is by the power end of the connection CD4013 integrated circuit of the 4th resistance R 4 series circuits, the intermediate node that simultaneously also connects in voltage stabilizing circuit the 3rd resistance R 3 and voltage stabilizing didoe D2, the minus earth of energy storage capacitor C3.And when preventing that master switch K from disconnecting, the electric current backflow volt circuit that stabilizes, the present embodiment is serially connected with the first electronic switch between the 4th resistance R 4 and the tie point of voltage stabilizing circuit, for simple in structure, the present embodiment directly adopts the 5th diode D5, while arranging, the anodic bonding voltage stabilizing circuit of the 5th diode D5, negative electrode connects the 4th resistance R 4, arranges like this and can disconnect diode D5 cut-off in season the 5th at master switch K, and power supply maintains the electric current of module 4 can only supply with CD4013 integrated circuit.

In addition, in the present embodiment, can power and maintain module 4 for the time of main control unit 21 continued powers by changing when the setting parameter master switch K of the 4th resistance R 4 and energy storage capacitor C3 disconnects.

Claims

1. one kind has the LED light adjusting circuit of opening triggering locking memory function, comprise the light emitting module of at least two serial connection LED lamp groups, for outside civil power being converted to the required galvanic electric current conversion module of LED lamp group, described outside civil power connects the current signal input of electric current conversion module by master switch, the current signal output end of electric current conversion module connects light emitting module it is characterized in that: it also comprises the LED intelligent dimming module that the switching signal of master switch is converted to triggering signal and controls LED lamp group in light emitting module, and as power supply, maintain the power supply that LED intelligent dimming module works on and maintain module when master switch is disconnected to period of contact next time, the power input of described LED intelligent dimming module is connected with the current output terminal of electric current conversion module, and its control signal output connects light emitting module.

2. according to claim 1 have a LED light adjusting circuit that open to trigger locking memory function, it is characterized in that: described LED intelligent dimming module comprises the main control unit as control centre, the power end of described main control unit connects electric current conversion module by current processing circuits, and its signal output part connects light emitting module by least one the electronic switch drive circuit arranging.

3. according to claim 2 have a LED light adjusting circuit that open to trigger locking memory function, it is characterized in that: described main control unit is CD4013 integrated circuit;

4. according to having described in claim 2 or 3, open the LED light adjusting circuit that triggers locking memory function, it is characterized in that: described electronic switch drive circuit comprises the triode as electronic switch, and the base stage of described triode connects main control unit by resistance, and collector electrode and emitter are connected respectively current signal input and the current signal output end of one group of LED lamp group.

5. according to having described in claim 2 or 3, open the LED light adjusting circuit that triggers locking memory function, it is characterized in that: described electronic switch drive circuit comprises constant-current source integrated circuit, the current sample end of described constant-current source integrated circuit connects the control signal output of main control unit, and drive end connects whole light emitting module by comprising that the current conversion circuit of the second electronic switch, transformer drives.

6. according to claim 4 have a LED light adjusting circuit that open to trigger locking memory function, it is characterized in that: described electronic switch drive circuit comprises constant-current source integrated circuit, the current sample end of described constant-current source integrated circuit connects the control signal output of main control unit, and drive end connects whole light emitting module by comprising that the current conversion circuit of the second electronic switch, transformer drives.