CN201821557U - LED lamp controlled through multi-channel constant voltage and constant current - Google Patents
LED lamp controlled through multi-channel constant voltage and constant current Download PDFInfo
- Publication number
- CN201821557U CN201821557U CN2010205765558U CN201020576555U CN201821557U CN 201821557 U CN201821557 U CN 201821557U CN 2010205765558 U CN2010205765558 U CN 2010205765558U CN 201020576555 U CN201020576555 U CN 201020576555U CN 201821557 U CN201821557 U CN 201821557U
- Authority
- CN
- China
- Prior art keywords
- decided
- feedback
- controller
- voltage
- power switch
- 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.)
- Expired - Fee Related
Links
Images
Abstract
An LED (light emitting diode) lamp controlled through multi-channel constant voltage and constant current comprises a constant current controller, a feedback controller, a constant voltage controller, and a plurality of LED devices, a plurality of first feedback elements, and a plurality of second feedback elements. Current signals and voltage signals back fed by the LED devices are processed through the constant current controller, the feedback controller and the constant voltage controller, so that multi-channel constant current and constant voltage control is realized, adaptative constant current and constant voltage control is achieved with the supply of alternating current and direct current power sources, and the whole efficiency and application flexibility of the LED lamp are improved.
Description
Technical field
The utility model relates to a kind of led lamp, relates in particular to a kind of multichannel and decides voltage and decide the led lamp of Current Control.
Background technology
(light emitting diode, it is unshakable LED) to be applied to the status of backlight of portable electronic product for light-emitting diode.At lighting field, LED has many advantages especially as the parts of semiconductor lighting most critical, as energy-saving and environmental protection, long-life, non-maintaining ... or the like.And led drive circuit is the important component part of LED product, still is the display panel field at illumination, backlight no matter, and the selection of drive circuit Technical Architecture all should be complementary with concrete application.
When using voltage source driving to have the led lamp of plurality of LEDs, may cause unequal by the magnitude of current of every LEDs because of the difference of internal resistance, and the luminosity of LED is proportional to forward current, make that the luminous intensity of every LEDs is unequal, cause the phenomenon of brightness irregularities, therefore will make the whole efficiency of led lamp reduce.
Therefore, how to design and a kind ofly have multichannel and decide voltage and decide the led lamp of Current Control, can be to utilize multichannel to decide voltage and to decide Current Control, be provided under the supply of AC and DC power supply, have and adaptively decide voltage and decide Current Control, with whole efficiency and the use elasticity that improves this led lamp, be a big problem that overcomes and solve for the utility model institute desire row.
The utility model content
The purpose of this utility model is, provide a kind of multichannel to decide voltage and decide the led lamp of Current Control, can be to utilize multichannel to decide voltage and to decide Current Control, be provided under the supply of AC and DC power supply, have and adaptively decide voltage and decide Current Control, with the whole efficiency that improves this led lamp and use elasticity.
In order to achieve the above object, the utility model provides a kind of multichannel to decide voltage and decides the led lamp of Current Control, comprises:
Certain current controller;
One feedback controller electrically connects and should decide current controller;
The certain voltage controller electrically connects this feedback controller;
A plurality of light-emitting diode assemblies, each this light-emitting diode assembly comprises: a LED light string, a power switch, a constant current source, this LED light string is become by a plurality of light emitting diode string joint groups, and this LED light string has one first end and one second end; This of each this LED light string first end is electrically connected to each other and electrically connects this and decides voltage controller; This power switch has one first end, one second end and one the 3rd end, and first end of this power switch electrically connects second end of this LED light string; The 3rd end of this power switch is electrically connected to each other, and a control loop is decided current controller with this respectively and this feedback controller electrically connects to form; This constant current source has one first end and one second end, and first end of this constant current source electrically connects this second end of this power switch; This of this constant current source second end ground connection;
A plurality of first feedback elements, each this first feedback element has one first end and one second end, and, corresponding this second end of each this LED light string and this first end of this power switch of electrically connecting of this first end of each this first feedback element; This second end of each this first feedback element is electrically connected to each other, and electrically connects to form one first feedback path and this feedback controller;
A plurality of second feedback elements, each this second feedback element has one first end and one second end, and, corresponding this second end of each this power switch and this first end of this constant current source of electrically connecting of this first end of each this second feedback element; This second end of each these a plurality of second feedback element is electrically connected to each other, to form one second feedback path and should decide the current controller electric connection.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, each this first feedback element is a resistor.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, each this first feedback element is a diode.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, each this power switch is a metal oxide semiconductcor field effect transistor.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, each this power switch is a transistor.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, when these a plurality of power switchs were metal oxide semiconductcor field effect transistor, these a plurality of power switchs were controlled by the pulse width modulation technology.
Above-mentioned multichannel is decided voltage and is decided the led lamp of Current Control, and wherein, when these a plurality of power switchs were transistor, these a plurality of power switchs were by the pulse width modulation technology or decide voltage control.
Effect of the present utility model is, utilizes multichannel to decide voltage and decides Current Control, is provided under the supply of AC and DC power supply, has adaptively to decide voltage and decide Current Control, with the whole efficiency that improves this led lamp and use elasticity.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 the utility model multichannel is decided voltage and the circuit block diagram of deciding led lamp first embodiment of Current Control; And
Fig. 2 decides voltage and the circuit block diagram of deciding led lamp second embodiment of Current Control for the utility model multichannel.
Wherein, Reference numeral
10 decide current controller
20 feedback controllers
30 decide voltage controller
40 light-emitting diode assemblies
402 LED light strings
404 power switchs
406 constant current sources
50 first feedback elements
60 second feedback elements
Embodiment
Relevant technology contents of the present utility model and detailed description cooperate graphic being described as follows:
See also Fig. 1 and decide voltage and the circuit block diagram of deciding led lamp first embodiment of Current Control for the utility model multichannel.This multichannel is decided voltage and is comprised certain current controller 10, a feedback controller 20, certain voltage controller 30, a plurality of light-emitting diode assembly 40, a plurality of first feedback element 50 and a plurality of second feedback element 60 with the led lamp of deciding Current Control.
This feedback controller 20 electrically connects should decide current controller 10.Should decide voltage controller 30 and electrically connect this feedback controller 20.
Each this light-emitting diode assembly 40 comprises a LED light string 402, a power switch 404 and a constant current source 406.Wherein, each this power switch 404 be a metal oxide semiconductcor field effect transistor (metal-oxide-semiconductor field-effect transistor, MOSFET).In addition, each this power switch 404 also can be transistor (transistor).When these a plurality of power switchs 404 were metal oxide semiconductcor field effect transistor, these a plurality of power switchs 404 were by pulse width modulation technology (pulse width modulation, PWM) control.When these a plurality of power switchs 404 are transistor, these a plurality of power switchs 404 by the pulse width modulation technology (pulse width modulation, PWM) or decide voltage control.
This LED light string 402 is composed in series by a plurality of light-emitting diodes (not indicating), and this LED light string 402 has one first end (not indicating) and one second end (not indicating).This first end of each this LED light string 402 is electrically connected to each other and electrically connects this and decides voltage controller 30.
This power switch 404 has one first end (not indicating), one second end (not indicating) and one the 3rd end (not indicating), and first end of this power switch 404 electrically connects second end of this LED light string 402.The 3rd end of this power switch 404 is electrically connected to each other, and a control loop (not indicating) is decided current controller 10 with this respectively and this feedback controller 20 electrically connects to form.In the present embodiment, be that a metal oxide semiconductcor field effect transistor (MOSFET) is an example with this power switch 404: this first end of this power switch 404 is that a drain electrode (drain), this second end are that one source pole (source) and the 3rd end are a grid (gate).The drain electrode of this power switch 404 (first end) electrically connects second end (negative electrode of last light-emitting diode) of this LED light string 402.The 3rd end of this power switch 404 (also i.e. the grid of this metal oxide semiconductcor field effect transistor) is electrically connected to each other, and decides current controller 10 with this respectively and electrically connects with this feedback controller 20 to form a control loop.
This constant current source 406 has one first end (indicate) and one second end (indicating), and first end of this constant current source 406 electrically connects this second end (also i.e. the source electrode of this metal oxide semiconductcor field effect transistor) of this power switch 404; This second end ground connection of this constant current source 406.
Each this first feedback element 50 has one first end (not indicating) and one second end (not indicating), and, corresponding this second end of each this LED light string 402 and this first end (the also i.e. drain electrode of this metal oxide semiconductcor field effect transistor) of this power switch 404 of electrically connecting of this first end of each this first feedback element 50; This second end of each these a plurality of first feedback element 50 is electrically connected to each other, to form one first feedback path and 20 electric connections of this feedback controller.Wherein, in the present embodiment, each these a plurality of first feedback element 50 is a resistor.
Each this second feedback element 60 has one first end (not indicating) and one second end (not indicating), and this first end of each this second feedback element 60 is corresponding to electrically connect this second end (also i.e. the source electrode of this metal oxide semiconductcor field effect transistor) of each this power switch 404 and this first end of this constant current source 406; This second end of each this second feedback element 60 is electrically connected to each other, to form one second feedback path and should decide current controller 10 electric connections.
This multichannel is decided voltage and following detailed description the in detail of led lamp operating principle of deciding Current Control: at first, this decides voltage controller 30 provides a driving voltage in order to drive these a plurality of light-emitting diode assemblies 40.When a plurality of power switch 404 conductings of this of this light-emitting diode assembly 40, should decide the driving voltage that provided of voltage controller 30 can be with the lumination of light emitting diode of these a plurality of series connection that this LED light string 402 is provided, and, by the luminosity of these constant current source 406 these a plurality of light-emitting diodes of adjustment.
Be worth mentioning, the quantity of these a plurality of first feedback elements 50 (being resistor in the present embodiment) is equal and corresponding mutually with the lamp string quantity of these a plurality of LED light strings 402.The voltage signal that the voltage to earth size of this first end of each this power switch 404 (i.e. drain electrode) is provided utilizes first feedback path to feed back to this feedback controller 20 accordingly by each this first feedback element 50.
In like manner, the quantity of these a plurality of second feedback elements 60 (being resistor in the present embodiment) is equal and corresponding mutually with the lamp string quantity of these a plurality of LED light strings 402.This second end (being source electrode) of each this power switch 404 flow through to the current signal that size of current provided of this constant current source 406 accordingly by each this second feedback element 60, utilize second feedback path to feed back to this and decide current controller 10.And this is decided current controller 10 and adds up these a plurality of size of current signals that fed back by this second feedback path.Then, this is decided current controller 10 current signal that is added up is sent to this feedback controller 20 and these a plurality of power switchs 404 respectively.Wherein, should decide current controller 10 provides the current signal that is added up to this power switch 404, in order to the 3rd end (being grid) of controlling these a plurality of power switchs 404, to realize deciding Current Control, guarantee these a plurality of LED light strings 402 identical electric current of all flowing through, with the luminosity of the light-emitting diode of keeping these a plurality of series connection.
This feedback controller 20 is accepted to decide current signal that current controller 10 transmitted and the voltage signal that is transmitted by this first feedback path by this simultaneously.Therefore, this feedback controller 20 is integrated current signal and the voltage signal that is received, be sent to this and decide voltage controller 30 in order to export a voltage signal, and then make this decide voltage controller 30 adjusting driver output voltages, and then these a plurality of LED light strings 402 are provided suitable voltage and decide voltage control, to reach preferable conversion efficiency.
See also Fig. 2 and decide voltage and the circuit block diagram of deciding led lamp second embodiment of Current Control for the utility model multichannel.The circuit framework of this embodiment is identical with the circuit framework of first embodiment, and both difference are that a plurality of first feedback elements 50 of this of present embodiment are to be diode with these a plurality of second feedback elements 60.Remaining circuit operation principle is all identical with first embodiment, so repeat no more.Be worth mentioning, at first embodiment and this two embodiment, these a plurality of first feedback elements 50 adopt resistor and diode respectively with these a plurality of second feedback elements 60, so, can make first feedback path and second feedback path all can make this led lamp more flexibly be applied in the power supply supply that exchanges with direct current by direct current and AC signal.
By this, utilize multichannel to decide voltage and decide Current Control, be provided under the supply of AC and DC power supply, have and adaptively decide voltage and decide Current Control, with the whole efficiency that improves this led lamp and use elasticity.
In sum, cording of the present invention has following advantage:
1, decides voltage and decide Current Control by multichannel, the adaptive constant voltage of this led lamp is provided and decides Current Control.
2, these a plurality of first feedback elements can adopt resistor and diode respectively with these a plurality of second feedback elements, so, can make first feedback path and second feedback path all can make this led lamp more flexibly be applied in the power supply supply that exchanges with direct current by direct current and AC signal.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (7)
1. a multichannel is decided voltage and is decided the led lamp of Current Control, it is characterized in that, comprises:
Certain current controller;
One feedback controller electrically connects and should decide current controller;
The certain voltage controller electrically connects this feedback controller;
A plurality of light-emitting diode assemblies, each this light-emitting diode assembly comprises: a LED light string, a power switch, a constant current source, this LED light string is become by a plurality of light emitting diode string joint groups, and this LED light string has one first end and one second end; This of each this LED light string first end is electrically connected to each other and electrically connects this and decides voltage controller; This power switch has one first end, one second end and one the 3rd end, and first end of this power switch electrically connects second end of this LED light string; The 3rd end of this power switch is electrically connected to each other, and a control loop is decided current controller with this respectively and this feedback controller electrically connects to form; This constant current source has one first end and one second end, and first end of this constant current source electrically connects this second end of this power switch; This of this constant current source second end ground connection;
A plurality of first feedback elements, each this first feedback element has one first end and one second end, and, corresponding this second end of each this LED light string and this first end of this power switch of electrically connecting of this first end of each this first feedback element; This second end of each this first feedback element is electrically connected to each other, and electrically connects to form one first feedback path and this feedback controller;
A plurality of second feedback elements, each this second feedback element has one first end and one second end, and, corresponding this second end of each this power switch and this first end of this constant current source of electrically connecting of this first end of each this second feedback element; This second end of each these a plurality of second feedback element is electrically connected to each other, to form one second feedback path and should decide the current controller electric connection.
2. multichannel according to claim 1 is decided voltage and is decided the led lamp of Current Control, it is characterized in that each this first feedback element is a resistor.
3. multichannel according to claim 1 is decided voltage and is decided the led lamp of Current Control, it is characterized in that each this first feedback element is a diode.
4. multichannel according to claim 1 is decided voltage and is decided the led lamp of Current Control, it is characterized in that each this power switch is a metal oxide semiconductcor field effect transistor.
5. multichannel according to claim 1 is decided voltage and is decided the led lamp of Current Control, it is characterized in that each this power switch is a transistor.
6. multichannel according to claim 4 is decided voltage and is decided the led lamp of Current Control, it is characterized in that when these a plurality of power switchs were metal oxide semiconductcor field effect transistor, these a plurality of power switchs were controlled by the pulse width modulation technology.
7. multichannel according to claim 5 is decided voltage and is decided the led lamp of Current Control, it is characterized in that when these a plurality of power switchs were transistor, these a plurality of power switchs were by the pulse width modulation technology or decide voltage control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205765558U CN201821557U (en) | 2010-10-20 | 2010-10-20 | LED lamp controlled through multi-channel constant voltage and constant current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205765558U CN201821557U (en) | 2010-10-20 | 2010-10-20 | LED lamp controlled through multi-channel constant voltage and constant current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821557U true CN201821557U (en) | 2011-05-04 |
Family
ID=43919498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205765558U Expired - Fee Related CN201821557U (en) | 2010-10-20 | 2010-10-20 | LED lamp controlled through multi-channel constant voltage and constant current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201821557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
-
2010
- 2010-10-20 CN CN2010205765558U patent/CN201821557U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
| CN103260313B (en) * | 2013-05-23 | 2015-12-09 | 中山市德源照明电器有限公司 | A kind of shunting LED dimming drive system and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101042732B1 (en) | LED device and driving method thereof | |
| CN102340904B (en) | Light-emitting diode driving device and driving method thereof | |
| CN202172516U (en) | Brightness and color temperature adjustable LED lamp | |
| CN102917486A (en) | LED lamp adjustable in luminance and color temperature | |
| CN102316648A (en) | Light-emitting diode (LED) illuminating device | |
| CN103959904B (en) | There is the solid luminescent driver of THDi bypass circuit | |
| CN202261957U (en) | Light-emitting diode (LED) lighting device | |
| CN101527988B (en) | Light source driver module and circuit | |
| CN106376143B (en) | A kind of circuit of the multiple LED pixel points of single channel constant current drive control | |
| CN102740540A (en) | Light emitting diode driving system | |
| EP2914064A1 (en) | Drive circuit and illumination device comprising the drive circuit | |
| US20120112643A1 (en) | Light-emitting diode lamp with multi-channel constant-voltage and constant-current control | |
| CN103024977B (en) | Light emitting diode driving circuit | |
| CN105517241B (en) | A kind of method and brightness switching device for controlling LED lamp brightness switching | |
| CN103379706B (en) | Driving circuit | |
| CN201821557U (en) | LED lamp controlled through multi-channel constant voltage and constant current | |
| CN101813260A (en) | LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit | |
| CN2543317Y (en) | Drive circuit for LED lamps and lanterns | |
| CN203289699U (en) | LED (light-emitting diode) high-power drive circuit | |
| JP2012074693A (en) | Driver circuit for light-emitting component | |
| KR101864237B1 (en) | Light-emitting diode lighting device having multiple driving stages | |
| CN203722879U (en) | Light-emitting device with light-emitting diode | |
| TWM457125U (en) | Lighting system and a circuit for adjusting a color temperature | |
| CN106572562B (en) | A kind of method of the multiple LED pixel points of single channel constant current drive control | |
| CN107404784A (en) | Dimming module, dimming method and lighting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20121020 |