CN106376129A - Regulating circuit and regulating method for LED - Google Patents

Regulating circuit and regulating method for LED Download PDF

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Publication number
CN106376129A
CN106376129A CN201610861726.3A CN201610861726A CN106376129A CN 106376129 A CN106376129 A CN 106376129A CN 201610861726 A CN201610861726 A CN 201610861726A CN 106376129 A CN106376129 A CN 106376129A
Authority
CN
China
Prior art keywords
led
circuit
constant current
chip
current device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610861726.3A
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Chinese (zh)
Inventor
吴晓平
王晓东
章昭
史文辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Putian Intelligent Lighting Institute Co Ltd
Original Assignee
Putian Intelligent Lighting Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Putian Intelligent Lighting Institute Co Ltd filed Critical Putian Intelligent Lighting Institute Co Ltd
Priority to CN201610861726.3A priority Critical patent/CN106376129A/en
Publication of CN106376129A publication Critical patent/CN106376129A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light emitting diodes [LEDs]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits

Abstract

The invention provides a regulating circuit and regulating method for an LED. The regulating circuit comprises an AC-DC conversion module, wherein an output end of the AC-DC conversion module is connected with input ends of a voltage stabilizer and a constant-current device separately; the output end of the constant-current device is connected with the LED; the voltage stabilizer is also connected with a memory chip and a regulating module; and the regulating module is connected with the constant-current device. The regulating module generates different PWM signals through on/off of a circuit in the AC-DC conversion module to control the constant-current device, thereby changing the color temperature and the brightness of the LED. Through regulating parameters, stored in the memory chip, for the LED, the regulating module generates a plurality of PWM signals to control the LED according to a plurality of regulating parameters, thereby better meeting the dimming requirement of a user and improving the practical comfort level of the user.

Description

Regulation circuit for led and control method
Technical field
The invention belongs to field of electrical equipment, particularly to for the regulation circuit of led and control method.
Background technology
With the development of semiconductor illumination technique, increasingly popularized based on the light fixture that led manufactures, particularly common family Front yard is had begun to large area and is illuminated using led.Led lighting energy saving, individual character, controlled advantage have obtained sufficient embodiment, user The degree of recognition of led illumination is also substantially improved.But, in existing market, led has brightness and the control mode major part of colour temperature is By wirelessly to control, seldom there is the product that by alternating current circuit, lamp brightness and colour temperature are carried out with two ore control, so lead to User experience is not high, and the popularization to led impacts.
Content of the invention
In order to solve shortcoming and defect present in prior art, the invention provides for the use improving user experience Regulation circuit in led.
In order to reach above-mentioned technical purpose, the invention provides for led regulation circuit it is characterised in that described tune Economize on electricity road includes:
Be connected to the AC-DC conversion module on electric lines of force, the outfan of described AC-DC conversion module respectively with manostat It is connected with the input of constant current device, the outfan of described constant current device is connected with led;
The outfan of described manostat is connected with for storing the storage chip of led regulation parameter and the defeated of adjustment module Enter end to be connected, the outfan of described storage chip is connected with the input of adjustment module by IC bus, described regulation The outfan of module is connected with the input of described constant current device.
Optionally, described constant current device includes the first constant current device and the second constant current device.
Optionally, described led includes warm colour led and cool colour led, and described warm colour led is defeated with described first constant current device Go out end to be connected, described cool colour led is connected with the outfan of described second constant current device;
The colour temperature of described warm colour led is less than 3300k, and the colour temperature of described cool colour led is higher than 5000k.
Optionally, described AC-DC conversion module includes:
Input protection circuit, the current rectifying and wave filtering circuit being connected with described input protection circuit, and with described rectifying and wave-filtering The AC-DC conversion chip that circuit connects.
Optionally, described input protection circuit includes electric fuse and varistor, and described AC-DC conversion chip is abs6.
Optionally, it is provided with least two-way pwm signal output apparatus in described adjustment module.
Optionally, described constant current device includes pwm signal input drive circuit, with described pwm signal input drive circuit The constant current chip connecting and the filter circuit being connected with described constant current chip.
Optionally, it is provided with main control chip in described adjustment module, the energization pins of described main control chip are provided with electricity Hold.
Optionally, described storage chip is the eeprom chip of at24c02.
The embodiment of the present invention additionally provides the control method for led, and described control method includes:
After the energising of AC-DC conversion module, the main control chip that is located in adjustment module carries out timing to led power-on time:
If described power-on time exceedes electric threshold value, in described AC-DC conversion module power-down, be once again powered up after, institute State adjustment module and the dutycycle of the pwm signal of output is fixed on 50%;
If described power-on time, not less than described upper electricity threshold value, makes the electric capacity being connected on described main control chip to master control Chip power supply so that described main control chip obtains new regulation parameter from storage chip, and in described AC-DC conversion module After being once again powered up, generate pwm signal corresponding with described new regulation parameter and led is controlled.
The technical scheme that the present invention provides has the benefit that
By having the regulation parameter to led in storage chip so that adjustment module is produced according to this multiple regulation parameter Raw multiple pwm signals are controlled to led such that it is able to better meet the light modulation demand of user, improve user's practicality Comfort level.
Brief description
In order to be illustrated more clearly that technical scheme, the accompanying drawing of required use in embodiment being described below Be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the regulation circuit provided by the present invention for led.
Specific embodiment
Accompanying drawing with reference to the embodiment of the present invention is explained and illustrated to the technical scheme of the embodiment of the present invention, but under State embodiment and be only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art On the premise of not making creative work, obtained other embodiment, broadly falls into protection scope of the present invention.
" embodiment " quoted in this manual or " example " or " example " means that itself describes in conjunction with the embodiments Special characteristic, structure or characteristic can be included in this patent at least one embodiment disclosed.Phrase is " in an embodiment In " appearance of each position in the description is not necessarily all referring to same embodiment.
In addition, can be using term " coupling " and " coupling " and its derivative in specification and claims appended by the present invention Word.It is to be understood by the skilled artisans that these terms are not intended as synonym each other." coupling " is used for instruction each other can direct thing Reason contact or electrical contact or can not two or more elements of direct physical contact or electrical contact co-operate each other or phase Interaction." connection " is used for representing the connection setup between two or more elements coupled to each other.
The process step shown in accompanying drawing appended by this specification is by inclusion hardware (such as circuit, special logic list Unit etc.), firmware (such as on general-purpose calculating appts or special purpose machinery run) or both the processs logic of combination execute. Although each embodiment following be describe to process according to some order operations it is understood that, the step of some descriptions Operation can execute in different order.Additionally, some step operation can be executed in parallel rather than be sequentially performed.
Embodiment one
The invention provides for the regulation circuit of led, described regulation circuit includes:
Be connected to the AC-DC conversion module on electric lines of force, the outfan of described AC-DC conversion module respectively with manostat It is connected with the input of constant current device, the outfan of described constant current device is connected with led;
The outfan of described manostat is connected with for storing the storage chip of led regulation parameter and the defeated of adjustment module Enter end to be connected, the outfan of described storage chip is connected with the input of adjustment module by IC bus, described regulation The outfan of module is connected with the input of described constant current device.
In force, poor in order to solve the Experience Degree when adjusting led brightness and colour temperature of user present in prior art Defect, the invention provides for led regulation circuit, including AC-DC conversion module, constant current device, adjustment module and The devices such as manostat, make adjustment module produce different pwm signals by the break-make of circuit in AC-DC conversion module, thus Constant current device is controlled, thus leading to the colour temperature of led and brightness to change.
In conjunction with the above-mentioned regulation circuit for led, the main control chip after the energising of AC-DC conversion module, in adjustment module Carry out timing, if power-on time led is detected exceedes predetermined threshold value, after upper once led energising, adjustment module will be defeated The dutycycle of the pwm signal going out is fixed on 50%, so so that the whole led under being in adjustment module can be in default threshold Light after value simultaneously, realize the synchronous effect lighted.
If power-on time led is detected is not above predetermined threshold value with regard to power-off, then relies on and be connected on main control chip Electric capacity power to main control chip, make main control chip obtain new regulation parameter from storage chip, and upper once be energized after, Generate and led is controlled so that led presents and front once different colour temperature from new regulation parameter corresponding pwm signal Or brightness.So user can make led be circulated switching between multiple ignition mode by quick switching manipulation, need not Wirelessly led is controlled using mobile device, thus the experience sense that improve user is subject to.
Specifically, the concrete structure of this regulation circuit, as shown in figure 1, for the ease of the understanding to this regulation circuit, in figure Two-way led is employed in 1.
One end of AC-DC conversion module is connected on electric lines of force, i.e. l live wire and n zero line, AC-DC conversion module Outfan is connected with the input of manostat and constant current device respectively, the outfan of manostat respectively with storage chip and adjust mould The input of block is connected, and the outfan of adjustment module is connected with the input of constant current device, and the outfan of constant current device is with led even Connect.
Based on the regulation circuit in Fig. 1, being mainly applicable to the 220v on power circuit of AC-DC conversion module Alternating current is converted to and adjusts the low-voltage DC that in circuit, numerous devices can use, and specifically, AC-DC conversion module includes: Input protection circuit, the current rectifying and wave filtering circuit being connected with described input protection circuit, and be connected with described current rectifying and wave filtering circuit AC-DC conversion chip.Input protection circuit therein includes electric fuse and varistor, and AC-DC conversion chip is abs6.
The manostat connecting in the outfan of AC-DC conversion module, typically using low pressure difference linear voltage regulator (low Dropout regulator, ldo).Traditional linear voltage regulator, the chip of such as 78xx series requires input voltage than defeated Go out voltage and exceed 2v~more than 3v, otherwise cannot normal work.But in some cases, such condition is excessively harsh , as 5v turns 3.3v, input and the pressure reduction only 1.7v exporting are it is clear that be unsatisfactory for condition.Therefore in order to more preferable Voltage regulation result, preferably practical ldo manostat here.
The storage chip being connected with manostat is used for the regulation parameter to led for the storage, the regulation mould being connected with storage chip Block obtains regulation parameter from storage chip, and produces corresponding pwm signal according to this regulation parameter, and then pwm signal is sent out Deliver in the constant current device being connected with led.Storage chip is EEPROM (electrically Erasable programmable read-only memory, eeprom), the storage core that after a kind of power down, data is not lost Piece.Eeprom can wipe existing information on computers or on special equipment, and reprogramming.Here why using eeprom For stored adjustment parameter, being also in order at can be according to actually used demand, and that can at any time regulation parameter be modified examines Consider such that it is able to better meet the light modulation demand of user, improve the practical comfort level of user.Preferably, storage chip choosing With at24c02, at24c02 is a 2k Bits Serial cmos eeprom, and 256 octets, catalyst company are contained in inside Advanced cmos technical spirit on decrease the power consumption of device.At24c02 has 8 byte page write buffers.This device passes through Iic EBI is operated, and has a special writing protection function, and the data in write storage chip can be protected Shield, prevents from being deleted because of maloperation.
It is provided with the pwm signal output apparatus for producing pwm signal in adjustment module, specifically, if made actual With being provided with n LED lamp in scene, need to be provided with n road pwm signal output apparatus in adjustment module, so as to each LED lamp Colour temperature and brightness are controlled.In view of pwm signal output apparatus have numerous designs, just no longer it is had in the present embodiment Body structure is described.
Be provided with main control chip in adjustment module, main control chip to get from storage chip generate after regulation parameter right The pwm signal output answered is to constant current device.So that main control chip can be after switching off in AC-DC Circuit, still Can there is time enough that storage chip is read, therefore the energization pins in main control chip also need to be provided with electric capacity It is worth sufficiently large electric capacity, to improve the working time of main control chip.
The constant current device being connected with AC-DC conversion module, adjustment module includes pwm signal input drive circuit, and described Constant current chip and the filter circuit being connected with described constant current chip that pwm signal input drive circuit connects.In order to Fig. 1 in Two-way led to coupling, constant current device includes the first constant current device and the second constant current device.By adjusting the size of output current To control the output of rear class two-way led, this module includes two-way pwm signal input drive circuit, constant current chip, sampling electricity Resistance and filter circuit etc..
Optionally, the two-way led in Fig. 1 is in addition to using identical led, can also be using warm colour led and cold Color led, described warm colour led is connected with the outfan of described first constant current device, described cool colour led and described second constant current device Outfan be connected.So exported respectively by adjustment module to the pwm signal of the first constant current device and the second constant current device, energy Enough respectively the colour temperature of warm colour led and cool colour led, brightness are adjusted, thus obtaining more various regulating effect, further The use feeling of lifting user.
The colour temperature of above-mentioned warm colour led is less than 3300k, and the colour temperature of described cool colour led is higher than 5000k, the colour temperature phase of two kinds of led Difference is larger, so can obtain more preferable using effect by adjusting respectively.
The invention provides for the regulation circuit of led, including AC-DC conversion module, the output of AC-DC conversion module End is connected with the input of manostat and constant current device respectively, and the outfan of constant current device is connected with led, and manostat is also associated with Storage chip and adjustment module, adjustment module is connected with constant current device.In AC-DC conversion module, the break-make of circuit makes to adjust Module produces different pwm signals, thus being controlled to constant current device, thus leading to the colour temperature of led and brightness to change. By having the regulation parameter to led in storage chip so that adjustment module produces multiple pwm according to this multiple regulation parameter Signal is controlled to led such that it is able to better meet the light modulation demand of user, improves the comfort level of user's use.
Those skilled in the art, after considering description and putting into practice invention disclosed herein, will readily occur to its of the present invention Its embodiment.The application is intended to any modification, purposes or the adaptations of the present invention, these modifications, purposes or Person's adaptations are followed the general principle of the present invention and are included the undocumented common knowledge in the art of the disclosure Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following Claim is pointed out.
It is described above and precision architecture illustrated in the accompanying drawings it should be appreciated that the invention is not limited in, and And various modifications and changes can carried out without departing from the scope.The scope of the present invention only to be limited by appended claim.

Claims (10)

1. it is used for the regulation circuit of led it is characterised in that described regulation circuit includes:
Be connected to the AC-DC conversion module on electric lines of force, the outfan of described AC-DC conversion module respectively with manostat and perseverance The input of stream device is connected, and the outfan of described constant current device is connected with led;
The outfan of described manostat is connected with for storing the storage chip of led regulation parameter and the input of adjustment module It is connected, the outfan of described storage chip is connected with the input of adjustment module by IC bus, described adjustment module Outfan be connected with the input of described constant current device.
2. the regulation circuit for led according to claim 1 is it is characterised in that described constant current device includes the first perseverance Stream device and the second constant current device.
3. the regulation circuit for led according to claim 2 is it is characterised in that described led includes warm colour led and cold Color led, described warm colour led is connected with the outfan of described first constant current device, described cool colour led and described second constant current device Outfan be connected;
The colour temperature of described warm colour led is less than 3300k, and the colour temperature of described cool colour led is higher than 5000k.
4. the regulation circuit for led according to claim 1 is it is characterised in that described AC-DC conversion module includes:
Input protection circuit, the current rectifying and wave filtering circuit being connected with described input protection circuit, and with described current rectifying and wave filtering circuit The AC-DC conversion chip connecting.
5. the regulation circuit for led according to claim 4 is it is characterised in that described input protection circuit includes protecting Dangerous silk and varistor, described AC-DC conversion chip is abs6.
6. the regulation circuit for led according to claim 1 is it is characterised in that be provided with least in described adjustment module Two-way pwm signal output apparatus.
7. the regulation circuit for led according to claim 1 is it is characterised in that described constant current device includes pwm signal Input driving circuit, the constant current chip being connected with described pwm signal input drive circuit and be connected with described constant current chip Filter circuit.
8. the regulation circuit for led according to claim 7 is it is characterised in that be provided with master in described adjustment module Control chip, is provided with electric capacity in the energization pins of described main control chip.
9. the regulation circuit for led according to claim 1 is it is characterised in that described storage chip is at24c02's Eeprom chip.
10. it is used for the control method of led it is characterised in that described control method includes:
After the energising of AC-DC conversion module, the main control chip that is located in adjustment module carries out timing to led power-on time:
If described power-on time exceedes electric threshold value, in described AC-DC conversion module power-down, be once again powered up after, described tune The dutycycle of the pwm signal of output is fixed on 50% by section module;
If described power-on time, not less than described upper electricity threshold value, makes the electric capacity being connected on described main control chip to main control chip Power so that described main control chip obtains new regulation parameter from storage chip, and in described AC-DC conversion module again After energising, generate pwm signal corresponding with described new regulation parameter and led is controlled.
CN201610861726.3A 2016-09-29 2016-09-29 Regulating circuit and regulating method for LED Pending CN106376129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610861726.3A CN106376129A (en) 2016-09-29 2016-09-29 Regulating circuit and regulating method for LED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610861726.3A CN106376129A (en) 2016-09-29 2016-09-29 Regulating circuit and regulating method for LED

Publications (1)

Publication Number Publication Date
CN106376129A true CN106376129A (en) 2017-02-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202565545U (en) * 2012-05-17 2012-11-28 吴雯雯 Multipath light-adjustable constant-current output LED drive circuit
CN202603016U (en) * 2012-06-08 2012-12-12 吴雯雯 Driving circuit of LED (light-emitting diode) fluorescent lamp with adjustable light
CN103152916A (en) * 2013-02-01 2013-06-12 中山市隆源光电有限公司 Light-emitting diode (LED) lighting lamp with adjustable light and adjustable color temperature and control method thereof
CN206136379U (en) * 2016-09-29 2017-04-26 普天智能照明研究院有限公司 A regulating circuit for LED

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202565545U (en) * 2012-05-17 2012-11-28 吴雯雯 Multipath light-adjustable constant-current output LED drive circuit
CN202603016U (en) * 2012-06-08 2012-12-12 吴雯雯 Driving circuit of LED (light-emitting diode) fluorescent lamp with adjustable light
CN103152916A (en) * 2013-02-01 2013-06-12 中山市隆源光电有限公司 Light-emitting diode (LED) lighting lamp with adjustable light and adjustable color temperature and control method thereof
CN206136379U (en) * 2016-09-29 2017-04-26 普天智能照明研究院有限公司 A regulating circuit for LED

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Application publication date: 20170201