CN104661383A - Light emitting diode dimming circuit - Google Patents
Light emitting diode dimming circuit Download PDFInfo
- Publication number
- CN104661383A CN104661383A CN201310597691.3A CN201310597691A CN104661383A CN 104661383 A CN104661383 A CN 104661383A CN 201310597691 A CN201310597691 A CN 201310597691A CN 104661383 A CN104661383 A CN 104661383A
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- China
- Prior art keywords
- emitting diode
- light emitting
- output port
- coupled
- dimming
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a light emitting diode dimming circuit. The light emitting diode dimming circuit comprises an input port, an output port, a voltage converter, a first light emitting diode pipe string, a first dimming switch, a second light emitting diode pipe string, a second dimming switch, a third light emitting diode pipe string, a third dimming switch, a fourth light emitting diode pipe string, a fourth dimming switch, a clock signal generator and a phase inverter, wherein the input port receives a power supply voltage; the output port provides a driving voltage; the voltage converter is coupled between the input port and the output port and is used for converting the power supply voltage into the driving voltage; the first light emitting diode pipe string and the first dimming switch are coupled in series between the output port and a reference ground, the second light emitting diode pipe string and the second dimming switch are coupled in series between the output port and the reference ground, the third light emitting diode pipe string and the third dimming switch are coupled in series between the output port and the reference ground, and the fourth light emitting diode pipe string and the fourth dimming switch are coupled in series between the output port and the reference ground; each of the first to fourth dimming switches is provided with a control terminal; the clock signal generator outputs clock signals to the control terminals of the first dimming switch and the third dimming switch; the phase inverter is coupled to the clock signal generator, receives the clock signals and provides phase inversing clock signals to the control terminals of the second dimming switch and the fourth dimming switch. According to the light emitting diode dimming circuit, the light emitting efficiency can be improved.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of light-emitting diode (LED) light adjusting circuit.
Background technology
LED is novel energy-conserving lighting apparatus, produces electric energy needed for identical light little more than incandescent lamp.The advantages such as compare with incandescent lamp with electricity-saving lamp, it is little that LED has volume, not fragile.These advantages make LED obtain at lighting field to apply widely.And how to improve the luminous efficiency of LED, in actual applications, receive publicity more and more.
Summary of the invention
Therefore the object of the invention is to propose a kind of dimming light-emitting diode circuit.
Technical scheme of the present invention is achieved in that
A kind of dimming light-emitting diode circuit, comprising: input port, receives supply power voltage; Output port, provides driving voltage; Voltage changer, is coupled between input port and output port, in order to supply power voltage is converted into driving voltage; First light-emitting diode string and the first dimmer switch, be coupled in series between output port and reference ground; Second light-emitting diode string and the second dimmer switch, be coupled in series between output port and reference ground; 3rd light-emitting diode string and the 3rd dimmer switch, be coupled in series between output port and reference ground; 4th light-emitting diode string and the 4th dimmer switch, be coupled in series in output port and with reference between ground, described first to fourth dimmer switch all has control terminal; Clock signal generator, the control terminal of clock signal to the first dimmer switch and the 3rd dimmer switch; Inverter, is coupled to clock signal generator, receive clock signal, and provides the control terminal of inverting clock signal to the second dimmer switch and the 4th dim signal.
Alternatively, described voltage changer comprises booster converter.
Alternatively, described clock signal has the duty ratio of 50%.
The invention has the beneficial effects as follows: improve luminous efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the electrical block diagram of a kind of dimming light-emitting diode circuit 100 of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the electrical block diagram of a kind of dimming light-emitting diode circuit 100 of the present invention.As shown in Figure 1, described dimming light-emitting diode circuit 100 comprises: input port, receives supply power voltage Vin; Output port, provides driving voltage V
o; Voltage changer 101, is coupled between input port and output port, in order to supply power voltage Vin is converted into driving voltage V
o; First LED strip 1-1 and the first dimmer switch 2-1, is coupled in series between output port and reference ground; Second LED strip 1-2 and the second dimmer switch 2-2, is coupled in series between output port and reference ground; 3rd LED strip 1-3 and the 3rd dimmer switch 2-3, is coupled in series between output port and reference ground; 4th LED strip 1-4 and the 4th dimmer switch 2-4, is coupled in series in output port and with reference between ground, described first to fourth dimmer switch all has control terminal; Clock signal generator 102, the control terminal of clock signal to the first dimmer switch 2-1 and the 3rd dimmer switch 2-3; Inverter 103, is coupled to clock signal generator 102, receive clock signal, and provides the control terminal of inverting clock signal to the second dimmer switch 2-2 and the 4th dim signal 2-4.
Preferably, voltage changer 101 comprises booster converter.
Preferably, described clock signal has the duty ratio of 50%.
In the running of dimming light-emitting diode circuit 100, when clock signal is high level, first dimmer switch 2-1 and the 3rd dimmer switch 2-3 is switched on, second dimmer switch 2-2 and the 4th dimmer switch 2-4 is disconnected, then the first LED strip 1-1 and the 3rd LED strip 1-3 upper reaches overcurrent, the second LED strip 1-2 and the 4th LED strip 1-4 does not have electric current to flow through; Now, the light of system is provided by the first LED strip 1-1 and the 3rd LED strip 1-3.When clock signal is low level, inverting clock signal is high level, then the first dimmer switch 2-1 and the 3rd dimmer switch 2-3 is disconnected, second dimmer switch 2-2 and the 4th dimmer switch 2-4 is switched on, then the first LED strip 1-1 and the 3rd LED strip 1-3 does not have electric current to flow through, the second LED strip 1-2 and the 4th LED strip 1-4 upper reaches overcurrent.Now, the light of system is provided by the second LED strip 1-2 and the 4th LED strip 1-4.
Therefore, dimming light-emitting diode circuit 100 of the present invention only needs the LED strip of half luminous in running, improves luminous efficiency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a dimming light-emitting diode circuit, is characterized in that, comprising:
Input port, receives supply power voltage;
Output port, provides driving voltage;
Voltage changer, is coupled between input port and output port, in order to supply power voltage is converted into driving voltage;
First light-emitting diode string and the first dimmer switch, be coupled in series between output port and reference ground;
Second light-emitting diode string and the second dimmer switch, be coupled in series between output port and reference ground;
3rd light-emitting diode string and the 3rd dimmer switch, be coupled in series between output port and reference ground;
4th light-emitting diode string and the 4th dimmer switch, be coupled in series in output port and with reference between ground, described first to fourth dimmer switch all has control terminal;
Clock signal generator, the control terminal of clock signal to the first dimmer switch and the 3rd dimmer switch;
Inverter, is coupled to clock signal generator, receive clock signal, and provides the control terminal of inverting clock signal to the second dimmer switch and the 4th dim signal.
2. dimming light-emitting diode circuit as claimed in claim 1, it is characterized in that, described voltage changer comprises booster converter.
3. dimming light-emitting diode circuit as claimed in claim 1, it is characterized in that, described clock signal has the duty ratio of 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597691.3A CN104661383A (en) | 2013-11-21 | 2013-11-21 | Light emitting diode dimming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597691.3A CN104661383A (en) | 2013-11-21 | 2013-11-21 | Light emitting diode dimming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104661383A true CN104661383A (en) | 2015-05-27 |
Family
ID=53251947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310597691.3A Pending CN104661383A (en) | 2013-11-21 | 2013-11-21 | Light emitting diode dimming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104661383A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110018450A1 (en) * | 2009-07-24 | 2011-01-27 | Kuo-Ching Hsu | Light Source Driving Device Capable of Dynamically Keeping Constant Current Sink and Related Method |
| CN202103913U (en) * | 2011-06-17 | 2012-01-04 | 英飞特光电（杭州）有限公司 | Led adjusting system |
| CN103052237A (en) * | 2012-12-17 | 2013-04-17 | 青岛红星化工厂 | PWM (Pulse Width Modulation) dimming LED (Light-Emitting Diode) system |
-
2013
- 2013-11-21 CN CN201310597691.3A patent/CN104661383A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110018450A1 (en) * | 2009-07-24 | 2011-01-27 | Kuo-Ching Hsu | Light Source Driving Device Capable of Dynamically Keeping Constant Current Sink and Related Method |
| CN202103913U (en) * | 2011-06-17 | 2012-01-04 | 英飞特光电（杭州）有限公司 | Led adjusting system |
| CN103052237A (en) * | 2012-12-17 | 2013-04-17 | 青岛红星化工厂 | PWM (Pulse Width Modulation) dimming LED (Light-Emitting Diode) system |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |