CN103517533A - Sectional light emitting diode lighting drive circuit - Google Patents
Sectional light emitting diode lighting drive circuit Download PDFInfo
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- CN103517533A CN103517533A CN201310508177.8A CN201310508177A CN103517533A CN 103517533 A CN103517533 A CN 103517533A CN 201310508177 A CN201310508177 A CN 201310508177A CN 103517533 A CN103517533 A CN 103517533A
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Abstract
The invention discloses a sectional light emitting diode lighting drive circuit which comprises a full-wave rectification circuit, a control circuit and a first light emitting diode to an n<th> light emitting diode. The control circuit controls the final light emitting diode in all the light emitting diodes of which the voltages reach the break-over voltage and the full-wave rectification circuit to form a closed circuit in the direction from the first light emitting diode to the n<th> light emitting diode. Since one-way pulsating direct current outputted by the full-wave rectification circuit has the change frequency periodically changed from low to high and then from high to low, the first light emitting diode and the n<th> light emitting diode are gradually turned off after being gradually turned on periodically. The phenomenon that the turning on/off of the light emitting diodes are controlled by adopting a high-frequency change-over switch in a conventional lighting circuit to result in EMI interference is avoided. The sectional light emitting diode lighting drive circuit provided by the invention is simple and clear in structure, and convenient to mount.
Description
Technical field
The present invention relates to LED lighting technical field, more particularly, relate to a kind of segmented led illumination driving circuit.
Background technology
Existing LED(Light-Emitting Diode, light-emitting diode) illumination driving circuit, comprise LED driving power and a plurality of LED.LED driving power is about to power supply supply and is converted to specific electric current and voltage with the luminous electric pressure converter of driving LED.The input of LED driving power can be for high pressure industrial frequency AC (being civil power) etc., and the output of LED driving power is mostly and can changes the constant current source that change voltage with LED forward voltage drop value.
LED driving power core parts comprise high frequency diverter switch, high-voltage capacitance, high-frequency inductor, switching component, feedback resistance, input filter device, output filtering device etc.Therefore, existing LED illumination driving circuit adopts high frequency diverter switch to control LED segmented illumination, produce very strong EMI and disturb (Electromagnetic Interference, electromagnetic interference), and the quantity of the components and parts that use is many, is not easy to install.
Summary of the invention
In view of this, the invention provides a kind of segmented led illumination driving circuit, do not adopt high frequency diverter switch, avoid producing EMI and disturb, and the quantity of the components and parts that use is few, convenient installation.
For achieving the above object, the invention provides following technical scheme:
An illumination driving circuit, comprising: full-wave rectifying circuit, control circuit and the first light-emitting diode-n light-emitting diode, and n is at least 2;
The first incoming end of described full-wave rectifying circuit connects civil power the first ac bus, the second incoming end of described full-wave rectifying circuit connects civil power the second ac bus, the DC output end of described full-wave rectifying circuit connects the input of described control circuit and the input of described the first light-emitting diode, after the alternating current of input is converted to unidirectional Rectified alternating current, exports;
Between described the first light-emitting diode-described n light-emitting diode, connect, described the first light-emitting diode-output of described n light-emitting diode connects respectively the first incoming end-n incoming end of described control circuit;
The output of described control circuit connects the direct current input of described full-wave rectifying circuit, for receiving the unidirectional Rectified alternating current of described full-wave rectifying circuit output, and according to periodically ascending, the descending change frequency again of described unidirectional Rectified alternating current, by the direction of described the first light-emitting diode-described n light-emitting diode, control light-emitting diode and described full-wave rectifying circuit composition closed-loop path described in last of all light-emitting diodes reach conducting voltage.
Preferably, described control circuit comprises: switching tube, electric capacity, stabilized voltage power supply, the first resistance-n+1 resistance, the first operational amplifier-n operational amplifier, NMOS pipe-nNMOS pipe and an outer meeting resistance;
The grid of described switching tube connects earth terminal, the drain electrode of described switching tube connects the DC output end of described full-wave rectifying circuit as the input of described control circuit, the source electrode of described switching tube connects the input of described stabilized voltage power supply and the first end of described electric capacity, and the second end of described electric capacity connects earth terminal;
The output of described stabilized voltage power supply connects the input of described the first resistance, for output reference voltage;
Described the first resistance-described n+1 resistance series connection, the output of described n+1 resistance connects earth terminal, and the direction by described n+1 resistance-described the first resistance, the Same Name of Ends that connects respectively described the first operational amplifier-described n operational amplifier between every two resistance, described the first resistance-described n+1 resistance is used for described reference voltage dividing potential drop;
The different name end of described the first operational amplifier-described n operational amplifier is connected, the different name end of described n operational amplifier connects one end of described outer meeting resistance simultaneously, the other end of described outer meeting resistance connects the direct current input of described full-wave rectifying circuit as the output of described control circuit, the output of described the first operational amplifier-described n operational amplifier connects respectively the grid of a described NMOS pipe-described nNMOS pipe;
A described NMOS pipe-source electrode for described nNMOS pipe connects respectively the different name end of described the first operational amplifier-described n operational amplifier, and the drain electrode of a described NMOS pipe-described nNMOS pipe connects respectively the output of described the first light-emitting diode-described n light-emitting diode as the first incoming end-n incoming end of described control circuit.
Preferably, described switching tube is JFET pipe.
Preferably, described full-wave rectifying circuit comprises: the first diode, the second diode, the 3rd diode and the 4th diode;
The input of described the first diode is connected as the first incoming end of described full-wave rectifying circuit with the output of described the 3rd diode, the output of described the first diode is connected as the DC output end of described full-wave rectifying circuit with the output of described the second diode, the input of described the second diode is connected as the second incoming end of described full-wave rectifying circuit with the output of described the 4th diode, and the input of described the 4th diode is connected as the direct current input of described full-wave rectifying circuit with the input of described the 3rd diode.
Compared with prior art, technical scheme provided by the present invention has the following advantages:
Segmented led illumination driving circuit provided by the present invention, comprises full-wave rectifying circuit, control circuit, and the first light-emitting diode-n light-emitting diode.Full-wave rectifying circuit is exported after the civil power of access is converted to unidirectional Rectified alternating current, for the first light-emitting diode-n light-emitting diode of connecting provides unidirectional Rectified alternating current, by the direction of the first light-emitting diode-n light-emitting diode, last light-emitting diode and full-wave rectifying circuit that control circuit is controlled all light-emitting diodes that reach conducting voltage form closed-loop path.Because the unidirectional Rectified alternating current of full-wave rectifying circuit output has periodically ascending, descending change frequency again, therefore the first light-emitting diode-n light-emitting diode presents the cyclic variation of extinguishing gradually after lighting gradually.
Segmented led illumination driving circuit provided by the invention, along with the galvanic variation of unidirectional pulse, light and extinguish, avoided adopting high frequency diverter switch to control lighting and extinguishing of light-emitting diode in existing lighting circuit, thereby produce EMI, disturbed.And segmented led illumination driving circuit provided by the invention is simple in structure clear, be convenient to install.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic diagram of a kind of segmented led illumination driving circuit that Fig. 1 provides for the embodiment of the present application;
The physical circuit schematic diagram of a kind of segmented led illumination driving circuit that Fig. 2 provides for the embodiment of the present application.
Embodiment
As described in background, LED driving power core parts comprise on-off controller, high-frequency inductor, high-voltage capacitance, switching component, feedback resistance, input filter device, output filtering device etc.Therefore, the quantity of the components and parts that existing LED illumination driving circuit is not only used is many, is not easy to install, and adopts HF switch to switch, and produces EMI and disturbs (Electromagnetic Interference, electromagnetic interference).
Meanwhile, adopt high-voltage capacitance, high-frequency inductor components and parts, improved LED illumination driving circuit cost.
Based on this, the invention provides a kind of segmented led illumination driving circuit, the problems referred to above that exist to overcome prior art, comprising: full-wave rectifying circuit, control circuit and the first light-emitting diode-n light-emitting diode, n is at least 2;
The first incoming end of described full-wave rectifying circuit connects civil power the first ac bus, the second incoming end of described full-wave rectifying circuit connects civil power the second ac bus, the DC output end of described full-wave rectifying circuit connects the input of described control circuit and the input of described the first light-emitting diode, after the alternating current of input is converted to unidirectional Rectified alternating current, exports;
Between described the first light-emitting diode-described n light-emitting diode, connect, described the first light-emitting diode-output of described n light-emitting diode connects respectively the first incoming end-n incoming end of described control circuit;
The output of described control circuit connects the direct current input of described full-wave rectifying circuit, for receiving the unidirectional Rectified alternating current of described full-wave rectifying circuit output, and according to periodically ascending, the descending change frequency again of described unidirectional Rectified alternating current, by the direction of described the first light-emitting diode-described n light-emitting diode, control light-emitting diode and described full-wave rectifying circuit composition closed-loop path described in last of all light-emitting diodes reach conducting voltage.
Segmented led illumination driving circuit provided by the invention, comprises full-wave rectifying circuit, control circuit, and the first light-emitting diode-n light-emitting diode.Full-wave rectifying circuit is exported after the civil power of access is converted to unidirectional Rectified alternating current, for the first light-emitting diode-n light-emitting diode of connecting provides unidirectional Rectified alternating current, by the direction of the first light-emitting diode-n light-emitting diode, last light-emitting diode and full-wave rectifying circuit that control circuit is controlled all light-emitting diodes that reach conducting voltage form closed-loop path.Because the unidirectional Rectified alternating current of full-wave rectifying circuit output has periodically ascending, descending change frequency again, therefore the first light-emitting diode-n light-emitting diode presents the cyclic variation of extinguishing gradually after lighting gradually.
Segmented led illumination driving circuit provided by the invention, along with the galvanic variation of unidirectional pulse, light and extinguish, avoided adopting high frequency diverter switch to control lighting and extinguishing of light-emitting diode in existing lighting circuit, thereby produce EMI, disturbed.And segmented led illumination driving circuit provided by the invention is simple in structure clear, be convenient to install.
Be more than core concept of the present invention, for above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention be described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public specific embodiment.
Secondly, the present invention is described in detail in conjunction with schematic diagram, when the embodiment of the present invention is described in detail in detail; for ease of explanation; the profile that represents device architecture can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of protection of the invention at this.The three-dimensional space that should comprise in addition, length, width and the degree of depth in actual fabrication.
The present embodiment provides a kind of segmented led illumination driving circuit, as shown in Figure 1, the schematic diagram of the segmented led illumination driving circuit providing for the embodiment of the present application, comprise: full-wave rectifying circuit 100, control circuit 200 and the first LED 1-n LED n, n is at least 2.
Wherein, the first incoming end of described full-wave rectifying circuit 100 connects civil power the first ac bus AC1, the second incoming end of described full-wave rectifying circuit 100 connects civil power the second ac bus AC2, the DC output end of described full-wave rectifying circuit 100 connects the input of described control circuit 200 and the input of described the first LED 1, after the alternating current of input is converted to unidirectional Rectified alternating current Vin, exports.
Described in described the first LED 1-, between n LED n, connect, the output of n LED n connects respectively the first incoming end VD1-n incoming end VDn of described control circuit 200 described in described the first LED 1-.Concrete, the input of the first LED 1 connects the output of full-wave rectifying circuit 100, the output of the first LED 1 connects the input of the second LED 2 and the first incoming end VD1 of control circuit 200, the output of the second LED 2 connects the input of the 3rd Light-Emitting Diode and the second incoming end VD2 of control circuit 200, until the output of described n LED n connects the n incoming end VDn of control circuit 200.
The output of described control circuit 200 connects the direct current input of described full-wave rectifying circuit 100, for receiving the unidirectional Rectified alternating current Vin of described full-wave rectifying circuit 100 outputs, and according to periodically ascending, the descending change frequency again of described unidirectional Rectified alternating current Vin, by the direction of n LED n described in described the first LED 1-, control light-emitting diode and described full-wave rectifying circuit 100 composition closed-loop paths described in last of all light-emitting diodes reach conducting voltage.
The segmented led illumination driving circuit operation principle that the present embodiment provides is: full-wave rectifying circuit is exported after the civil power of access is converted to unidirectional Rectified alternating current Vin, for the first light-emitting diode-n light-emitting diode of connecting provides unidirectional Rectified alternating current Vin, by the direction of the first light-emitting diode-n light-emitting diode, last light-emitting diode and full-wave rectifying circuit that control circuit is controlled all light-emitting diodes that reach conducting voltage form closed-loop path.Because the unidirectional Rectified alternating current Vin of full-wave rectifying circuit output has periodically ascending, descending change frequency again, therefore the first light-emitting diode-n light-emitting diode presents the cyclic variation of extinguishing gradually after lighting gradually.
Shown in figure 2, the physical circuit schematic diagram of a kind of segmented led illumination driving circuit providing for the embodiment of the present application, comprise: full-wave rectifying circuit 100, control circuit 200 and the first LED 1-n LED n, n is at least 2.
Wherein, control circuit 200 comprises: switching tube JFET, capacitor C, stabilized voltage power supply 201, the first resistance R 1-n+1 resistance R n, the first operational amplifier OP1-n operational amplifier OPn, NMOS pipe N1-nNMOS pipe Nn and an outer meeting resistance RT.
The preferred switching tube of the present embodiment is JEFT pipe ((Junction-FET, junction gate fet).The grid of described switching tube JFET connects earth terminal, the drain electrode of described switching tube JFET connects the DC output end of described full-wave rectifying circuit 100 as the input of described control circuit 200, the source electrode of described switching tube JFET connects the input of described stabilized voltage power supply 201 and the first end of described capacitor C, and the second end of described capacitor C connects earth terminal.
Described switching tube JFET for control described capacitor C discharge and recharge and, switching tube JFET and capacitor C be stabilized voltage power supply 201 conveying direct currents jointly.Due to the unidirectional Rectified alternating current Vin of full-wave rectifying circuit 100 outputs, when the shutoff voltage of switching tube JFET is less than or equal to the discharge voltage of capacitor C, switching tube JFET cut-off; When the shutoff voltage of switching tube JFET is greater than the discharge voltage of capacitor C, switching tube JFET conducting, therefore, the metastable input voltage of stabilized voltage power supply 201 is exported jointly by switching tube JFET and capacitor C.
The output of described stabilized voltage power supply 201 connects the input of described the first resistance R 1, for output reference voltage.N+1 resistance R n+1 series connection described in described the first resistance R 1-, the output of described n+1 resistance R n+1 connects earth terminal, and the direction by the first resistance R 1 described in described n+1 resistance R n+1-, the Same Name of Ends that connects respectively n operational amplifier OPn described in described the first operational amplifier OP1-between every two resistance, described in described the first resistance R 1-, n+1 resistance R n+1 is used for described reference voltage dividing potential drop, and the voltage that is input to the Same Name of Ends of OP1-OPn increases successively.
Described in described the first operational amplifier OP1-, the different name end of n operational amplifier OPn is connected, the different name end of described n operational amplifier OPn connects described outer meeting resistance RT one end simultaneously, the other end of described outer meeting resistance RT connects the direct current input of described full-wave rectifying circuit 100 as the output of described control circuit 200, the output of n operational amplifier OPn connects respectively the grid of nNMOS pipe Nn described in a described NMOS pipe N1-described in described the first operational amplifier OP1-;
Described in a described NMOS pipe N1-, the source electrode of nNMOS pipe Nn connects respectively the different name end of n operational amplifier OPn described in described the first operational amplifier OP1-, and the drain electrode of nNMOS pipe Nn connects respectively the output of n LED n described in described the first LED 1-as the first incoming end VD1-n incoming end VDn of described control circuit 200 described in a described NMOS pipe N1-.
The full-wave rectifying circuit 100 that the present embodiment provides comprises: the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4.
The input of described the first diode D1 is connected as the first incoming end of described full-wave rectifying circuit 100 with the output of described the 3rd diode D3, the output of described the first diode D1 is connected as the DC output end of described full-wave rectifying circuit 100 with the output of described the second diode D2, the input of described the second diode D2 is connected as the second incoming end of described full-wave rectifying circuit 100 with the output of described the 4th diode D4, the input of described the 4th diode D4 is connected as the direct current input of described full-wave rectifying circuit 100 with the input of described the 3rd diode D3.
The segmented led illumination driving circuit operation principle that this enforcement provides is as follows:
When the size of the unidirectional pulse direct current Vin of full-wave rectifying circuit 100 output fails to reach the conducting voltage of the first LED 1, OP1-OPn output high level makes N1-Nn conducting, but due to not conducting of LED1, LED1-LEDn is and extinguishes state.
When the size of the unidirectional pulse direct current Vin of full-wave rectifying circuit 100 output only reaches the conducting voltage of the first LED 1, LED1 conducting, OP1-OPn output high level makes N1-Nn conducting, but due to not conducting of LED2-LEDn, therefore only have LED1 to light, all the other LED are and extinguish state.
When the size of the unidirectional pulse direct current Vin of full-wave rectifying circuit 100 output reaches the conducting voltage of the second LED 2, LED1 and LED2 conducting, the voltage of outer meeting resistance RT is identical with the Same Name of Ends voltage of OP2, the Same Name of Ends voltage of OP3-OPn is greater than the voltage of outer meeting resistance RT, so OP2-OPn output high level makes N2-Nn conducting.And the Same Name of Ends voltage of OP1 is less than the voltage of outer meeting resistance RT, due to negative feedback, OP1 output low level makes N1 cut-off.Now LED1 and LED2 light, and all the other LED are and extinguish state.
Until when the size of the unidirectional pulse direct current Vin of full-wave rectifying circuit 100 output reaches the conducting voltage of n LED n, LED1-LEDn conducting, the voltage of outer meeting resistance RT is identical with the Same Name of Ends voltage of OPn, and the Same Name of Ends voltage of OP1-OPn-1 is less than the voltage of outer meeting resistance RT, due to negative feedback, OP1-OPn-1 output low level makes N1-Nn-1 cut-off.Now LED1-LEDn all lights.
Segmented led illumination driving circuit provided by the present invention, comprises full-wave rectifying circuit, control circuit, and the first light-emitting diode-n light-emitting diode.Full-wave rectifying circuit is exported after the civil power of access is converted to unidirectional Rectified alternating current, for the first light-emitting diode-n light-emitting diode of connecting provides unidirectional Rectified alternating current, by the direction of the first light-emitting diode-n light-emitting diode, last light-emitting diode and full-wave rectifying circuit that control circuit is controlled all light-emitting diodes that reach conducting voltage form closed-loop path.Because the unidirectional Rectified alternating current of full-wave rectifying circuit output has periodically ascending, descending change frequency again, therefore the first light-emitting diode-n light-emitting diode presents the cyclic variation of extinguishing gradually after lighting gradually.
Segmented led illumination driving circuit provided by the invention, along with the galvanic variation of unidirectional pulse, light and extinguish, avoided adopting high frequency diverter switch to control lighting and extinguishing of light-emitting diode in existing lighting circuit, thereby produce EMI, disturbed.And segmented led illumination driving circuit provided by the invention is simple in structure clear, be convenient to install.
And segmented led illumination driving circuit provided by the invention do not adopt the elements such as high-voltage capacitance and high voltage induction, reduced cost.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a segmented led illumination driving circuit, is characterized in that, comprising: full-wave rectifying circuit, control circuit and the first light-emitting diode-n light-emitting diode, and n is at least 2;
The first incoming end of described full-wave rectifying circuit connects civil power the first ac bus, the second incoming end of described full-wave rectifying circuit connects civil power the second ac bus, the DC output end of described full-wave rectifying circuit connects the input of described control circuit and the input of described the first light-emitting diode, after the alternating current of input is converted to unidirectional Rectified alternating current, exports;
Between described the first light-emitting diode-described n light-emitting diode, connect, described the first light-emitting diode-output of described n light-emitting diode connects respectively the first incoming end-n incoming end of described control circuit;
The output of described control circuit connects the direct current input of described full-wave rectifying circuit, for receiving the unidirectional Rectified alternating current of described full-wave rectifying circuit output, and according to periodically ascending, the descending change frequency again of described unidirectional Rectified alternating current, by the direction of described the first light-emitting diode-described n light-emitting diode, control light-emitting diode and described full-wave rectifying circuit composition closed-loop path described in last of all light-emitting diodes reach conducting voltage.
2. segmented led illumination driving circuit according to claim 1, it is characterized in that, described control circuit comprises: switching tube, electric capacity, stabilized voltage power supply, the first resistance-n+1 resistance, the first operational amplifier-n operational amplifier, NMOS pipe-nNMOS pipe and an outer meeting resistance;
The grid of described switching tube connects earth terminal, the drain electrode of described switching tube connects the DC output end of described full-wave rectifying circuit as the input of described control circuit, the source electrode of described switching tube connects the input of described stabilized voltage power supply and the first end of described electric capacity, and the second end of described electric capacity connects earth terminal;
The output of described stabilized voltage power supply connects the input of described the first resistance, for output reference voltage;
Described the first resistance-described n+1 resistance series connection, the output of described n+1 resistance connects earth terminal, and the direction by described n+1 resistance-described the first resistance, the Same Name of Ends that connects respectively described the first operational amplifier-described n operational amplifier between every two resistance, described the first resistance-described n+1 resistance is used for described reference voltage dividing potential drop;
The different name end of described the first operational amplifier-described n operational amplifier is connected, the different name end of described n operational amplifier connects one end of described outer meeting resistance simultaneously, the other end of described outer meeting resistance connects the direct current input of described full-wave rectifying circuit as the output of described control circuit, the output of described the first operational amplifier-described n operational amplifier connects respectively the grid of a described NMOS pipe-described nNMOS pipe;
A described NMOS pipe-source electrode for described nNMOS pipe connects respectively the different name end of described the first operational amplifier-described n operational amplifier, and the drain electrode of a described NMOS pipe-described nNMOS pipe connects respectively the output of described the first light-emitting diode-described n light-emitting diode as the first incoming end-n incoming end of described control circuit.
3. segmented led illumination driving circuit according to claim 2, is characterized in that, described switching tube is JFET pipe.
4. segmented led illumination driving circuit according to claim 2, is characterized in that, described full-wave rectifying circuit comprises: the first diode, the second diode, the 3rd diode and the 4th diode;
The input of described the first diode is connected as the first incoming end of described full-wave rectifying circuit with the output of described the 3rd diode, the output of described the first diode is connected as the DC output end of described full-wave rectifying circuit with the output of described the second diode, the input of described the second diode is connected as the second incoming end of described full-wave rectifying circuit with the output of described the 4th diode, and the input of described the 4th diode is connected as the direct current input of described full-wave rectifying circuit with the input of described the 3rd diode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310508177.8A CN103517533A (en) | 2013-10-24 | 2013-10-24 | Sectional light emitting diode lighting drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310508177.8A CN103517533A (en) | 2013-10-24 | 2013-10-24 | Sectional light emitting diode lighting drive circuit |
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| CN103517533A true CN103517533A (en) | 2014-01-15 |
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| CN201310508177.8A Pending CN103517533A (en) | 2013-10-24 | 2013-10-24 | Sectional light emitting diode lighting drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104270874A (en) * | 2014-10-27 | 2015-01-07 | 无锡华润矽科微电子有限公司 | Sectional type LED driving circuit |
| CN106332362A (en) * | 2016-09-20 | 2017-01-11 | 陕西亚成微电子股份有限公司 | High-voltage linear LED control circuit reducing harmonic |
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| CN201509344U (en) * | 2009-09-29 | 2010-06-16 | 李云霄 | Drive circuit of LED light source of alternating-current power supply |
| CN102314835A (en) * | 2010-07-02 | 2012-01-11 | 聚积科技股份有限公司 | Segmented controlled drive device of light-emitting diodes (LEDs) |
| CN102858062A (en) * | 2012-08-22 | 2013-01-02 | 深圳市明微电子股份有限公司 | Light emitting diode (LED) control circuit and LED illuminating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201509344U (en) * | 2009-09-29 | 2010-06-16 | 李云霄 | Drive circuit of LED light source of alternating-current power supply |
| CN102314835A (en) * | 2010-07-02 | 2012-01-11 | 聚积科技股份有限公司 | Segmented controlled drive device of light-emitting diodes (LEDs) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104270874A (en) * | 2014-10-27 | 2015-01-07 | 无锡华润矽科微电子有限公司 | Sectional type LED driving circuit |
| CN104270874B (en) * | 2014-10-27 | 2017-07-18 | 无锡华润矽科微电子有限公司 | segmented LED drive circuit |
| CN106332362A (en) * | 2016-09-20 | 2017-01-11 | 陕西亚成微电子股份有限公司 | High-voltage linear LED control circuit reducing harmonic |
| CN106332362B (en) * | 2016-09-20 | 2019-03-15 | 陕西亚成微电子股份有限公司 | A kind of high-voltage linear LED control circuit reducing harmonic wave |
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Application publication date: 20140115 |