CN201438773U - LED dimming device - Google Patents
LED dimming device Download PDFInfo
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- CN201438773U CN201438773U CN2009201343516U CN200920134351U CN201438773U CN 201438773 U CN201438773 U CN 201438773U CN 2009201343516 U CN2009201343516 U CN 2009201343516U CN 200920134351 U CN200920134351 U CN 200920134351U CN 201438773 U CN201438773 U CN 201438773U
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- voltage regulator
- voltage
- regulator module
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model relates to an LED dimming device, comprising a first voltage regulation module with alternating current output, a power factor correction module for correcting alternating current power factor, a second voltage regulation module for reducing the alternating current voltage, a controlled current source and a control module for controlling the controlled current source to output electric current; the first voltage regulation module outputs the regulated alternating current voltage to the power factor correction module, and the output of the power factor correction module is connected with the second voltage regulation module, the output of the second voltage regulation module is connected with the input end of the controlled current source, the input end of the control module is connected with the output end of the first voltage regulation module, and the output end thereof is connected with the control end of the controlled current source; by adopting the LED dimming device, the utility model has the beneficial effects that the dimming effect is obvious without causing obvious electromagnetic interference.
Description
Technical field
The utility model relates to lighting field, more particularly, relates to a kind of LED light modulating device.
Background technology
Usually, the light modulation to lighting all is the pulse duty factor of regulating its driving voltage or regulating its drive waveforms.This mode can be used for traditional incandescent lamp or electricity-saving lamp.But, for new light sources light-emitting diode (LED), the adjusting of voltage is little to its luminous degree influence, and the wave distortion that might bring AC power for the mode of this adjusting of duty ratio of regulating driving pulse, cause electromagnetic interference, may cause product can not pass through detection etc. in occasion that electromagnetic interference is had certain requirements, to a certain extent, this dimming mode of prior art has limited the scope of application of its product.
The utility model content
The technical problems to be solved in the utility model is, at the bigger defective of the above-mentioned effect of prior art electromagnetic interference not obvious, that bring, provides a kind of act on obvious, the less a kind of LED light modulating device of electromagnetic interference.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of LED light modulating device, comprise the control module that it is output as first Voltage Regulator Module of alternating current, proofreaies and correct the power factor correction module of described AC power factor, described alternating current voltage is reduced by second Voltage Regulator Module, controlled current source and controls described controlled current source output current; The adjusted alternating voltage of described first Voltage Regulator Module output arrives described power factor module, shown in the output of power factor correction module be connected with described second Voltage Regulator Module, the output of described second Voltage Regulator Module is connected with the input of described controlled current source, described control module input is connected with the output of described first Voltage Regulator Module, and its output is connected the control end of described controlled current source.
In LED light modulating device described in the utility model, described second Voltage Regulator Module comprises that pwm unit, its control end of transformer T1, the different pulse duration waveforms of output are connected and is subjected to described pwm unit output to be subjected to the control of its output waveform and conducting or switch element that ends and rectification unit; Wherein, described primary one end is connected the output of described power factor correction module 2, and the other end of primary is connected with a switch terminals of described switch element, another switch terminals of described switch element be electrically connected; Described transformer secondary output one end ground connection, its other end is connected with described rectification unit input.
In LED light modulating device described in the utility model, described control module comprises diode D14, resistance R 23, resistance R 24, resistance R 25, capacitor C 18, capacitor C 19, capacitor C 20, photoelectrical coupler U4 and three end a reference source D16, the positive pole of described diode D14 is connected the output of described first Voltage Regulator Module, the negative pole of described diode D14 is by power supply C18 ground connection and be connected to the luminous tube positive pole of described photoelectrical coupler U4 by resistance R 23, this luminous tube minus earth, described capacitor C 24 are attempted by between the positive pole and negative pole of described luminous tube; The minus earth of the light receiving tube of described photoelectrical coupler U4, the positive pole of the light receiving tube of described photoelectrical coupler U4 respectively by resistance R 25 and resistance R 24 with for the power end of its power supply and be connected, and be connected with the control end of described three end a reference source D16; The output of described three end a reference source D16 is connected with the control end of described controlled current source.
In LED light modulating device described in the utility model, described three end a reference source U1 comprise TL431.
In LED light modulating device described in the utility model, described first Voltage Regulator Module comprises the silicon-controlled voltage regulation unit.
In LED light modulating device described in the utility model, the voltage of described first Voltage Regulator Module output comprises that exchanging 85V arrives interchange 265V.
In LED light modulating device described in the utility model, the load of described light modulating device comprises a plurality of LED of serial connection in the same way.
Implement LED light modulating device of the present utility model, has following beneficial effect: owing to export different drive currents according to the difference of input voltage, and used power factor correction module, so the dimming effect of this LED light modulating device is obvious, can not cause tangible electromagnetic interference.
Description of drawings
Fig. 1 is the structural representation of the utility model LED light modulating device embodiment;
Fig. 2 is the electrical schematic diagram of control module among the described embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further.
As shown in Figure 1, in LED light modulating device embodiment of the present utility model, comprise first Voltage Regulator Module 1, power factor correction module 2, second Voltage Regulator Module 3, controlled current source 4, control module 5 and LED lamp 6.Wherein, first Voltage Regulator Module 1 is output as alternating voltage, its output is connected to power factor correction module 2, power factor correction module 2 is adjusted the waveform of first Voltage Regulator Module, 1 output AC electricity, make its power factor be corrected, obtain the comparatively pure alternating current of its waveform, this alternating current is sent to above-mentioned second Voltage Regulator Module 3 again, this second Voltage Regulator Module 3 is converted to this alternating current the alternating voltage that is fit to driving LED, with its rectification is direct voltage, and this direct voltage is sent to described LED lamp 6, between LED lamp 6 and ground, also be connected with controlled current source 4, this controlled current source 4 is under the effect of control signal, regulate the electric current that flows through above-mentioned LED lamp 6 by the electric current of regulating self, thereby reach the effect of the luminosity of control LED lamp 6; The control signal of controlling above-mentioned controlled current source 4 is from control module 5, the input of this control module 5 is connected with the output of above-mentioned first Voltage Regulator Module 1, obtain the output voltage values of above-mentioned first Voltage Regulator Module 1, and, adjust the size of the control signal that outputs to above-mentioned controlled current source 4 according to above-mentioned output voltage values.In the present embodiment, the output voltage values of above-mentioned first Voltage Regulator Module 1 comprises 85V-265V, and the signal level of control module 5 output makes the luminosity of LED lamp 6 between 1% to 100%, in a word, the incoming level of first Voltage Regulator Module 1 is high more, the brighter display of LED lamp 6.In the present embodiment, above-mentioned second Voltage Regulator Module 2 comprises that pwm unit, its control end of transformer T1, the different pulse duration waveforms of output are connected and is subjected to described pwm unit output to be subjected to the control of its output waveform and conducting or switch element that ends and rectification unit; The elementary end of described transformer T1 is connected the output of described power factor correction module 2, and its other end is connected with a switch terminals of described switch element, another switch terminals of described switch element be electrically connected; T1 level of described transformer one end ground connection, its other end is connected with described rectification unit input.Wherein, described first Voltage Regulator Module comprises the silicon-controlled voltage regulation unit.The voltage of described first Voltage Regulator Module output comprises that exchanging 85V arrives interchange 265V.And the load of described light modulating device comprises a plurality of LED of serial connection in the same way, and promptly the positive pole of first LED connects power supply, and its negative pole links to each other with the positive pole of second LED; And the negative pole of second LED links to each other with the positive pole of the 3rd LED, and by that analogy.
Fig. 2 is the present embodiment electrical schematic diagram, in Fig. 2, above-mentioned pwm unit comprises with integrated circuit U1 being a plurality of elements at center, the conducting of the control signal control switch unit field effect transistor Q1 of its output or end, above-mentioned rectification unit comprises diode D8, inductance L 2, capacitor C 3 and capacitor C 4.In addition, in the present embodiment, above-mentioned control module 5 comprises diode D14, resistance R 23, resistance R 24, resistance R 25, capacitor C 18, capacitor C 19, capacitor C 20, photoelectrical coupler U4 and three end a reference source D16, the positive pole of described diode D14 is connected the output of described first Voltage Regulator Module, the negative pole of described diode D14 is by power supply C18 ground connection and be connected to the luminous tube positive pole of described photoelectrical coupler U4 by resistance R 23, this luminous tube minus earth, described capacitor C 24 are attempted by between the positive pole and negative pole of described luminous tube; The minus earth of the light receiving tube of described photoelectrical coupler U4, the positive pole of the light receiving tube of described photoelectrical coupler U4 respectively by resistance R 25 and resistance R 24 with for the power end of its power supply and be connected, and be connected with the control end of described three end a reference source D16; The output of described three end a reference source D16 is connected with the control end of described controlled current source.Wherein, above-mentioned three end a reference source D16 comprise TL431.
In Fig. 2, when input voltage is exchanging when changing between the 85V-265V, the LED of a plurality of serial connections of its load, comprise that the brightness of D9, D10, D11 etc. changes between minimum brightness and high-high brightness, input voltage is low more, and the brightness of its load is more little.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (7)
1. LED light modulating device, it is characterized in that, comprise the control module that it is output as first Voltage Regulator Module of alternating current, proofreaies and correct the power factor correction module of described AC power factor, described alternating current voltage is reduced by second Voltage Regulator Module, controlled current source and controls described controlled current source output current; The adjusted alternating voltage of described first Voltage Regulator Module output arrives described power factor module, shown in the output of power factor correction module be connected with described second Voltage Regulator Module, the output of described second Voltage Regulator Module is connected with the input of described controlled current source, described control module input is connected with the output of described first Voltage Regulator Module, and its output is connected the control end of described controlled current source.
2. LED light modulating device according to claim 1, it is characterized in that described second Voltage Regulator Module comprises that pwm unit, its control end of transformer, the different pulse duration waveforms of output are connected and is subjected to described pwm unit output to be subjected to the control of its output waveform and conducting or switch element that ends and rectification unit; Described primary one end is connected the output of described power factor correction module, and its other end is connected with a switch terminals of described switch element, another switch terminals of described switch element be electrically connected; Described transformer secondary output one end ground connection, its other end is connected with described rectification unit input.
3. LED light modulating device according to claim 2, it is characterized in that, described control module comprises diode D14, resistance R 23, resistance R 24, resistance R 25, capacitor C 18, capacitor C 19, capacitor C 20, photoelectrical coupler U4 and three end a reference source D16, the positive pole of described diode D14 is connected the output of described first Voltage Regulator Module, the negative pole of described diode D14 is by power supply C18 ground connection and be connected to the luminous tube positive pole of described photoelectrical coupler U4 by resistance R 23, this luminous tube minus earth, described capacitor C 24 are attempted by between the positive pole and negative pole of described luminous tube; The minus earth of the light receiving tube of described photoelectrical coupler U4, the positive pole of the light receiving tube of described photoelectrical coupler U4 respectively by resistance R 25 and resistance R 24 with for the power end of its power supply and be connected, and be connected with the control end of described three end a reference source D16; The output of described three end a reference source D16 is connected with the control end of described controlled current source.
4. LED light modulating device according to claim 3 is characterized in that, described three end a reference source U1 comprise TL431.
5. according to any described LED light modulating device of claim 1-4, it is characterized in that described first Voltage Regulator Module comprises the silicon-controlled voltage regulation unit.
6. LED light modulating device according to claim 5 is characterized in that, the voltage of described first Voltage Regulator Module output comprises that exchanging 85V arrives interchange 265V.
7. LED light modulating device according to claim 6 is characterized in that, the load of described light modulating device comprises a plurality of LED of serial connection in the same way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201343516U CN201438773U (en) | 2009-07-31 | 2009-07-31 | LED dimming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201343516U CN201438773U (en) | 2009-07-31 | 2009-07-31 | LED dimming device |
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| Publication Number | Publication Date |
|---|---|
| CN201438773U true CN201438773U (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201343516U Expired - Fee Related CN201438773U (en) | 2009-07-31 | 2009-07-31 | LED dimming device |
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| CN (1) | CN201438773U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861024A (en) * | 2010-06-02 | 2010-10-13 | 艾迪光电（杭州）有限公司 | Centralized control dimming system of LED |
| CN103415128A (en) * | 2013-09-02 | 2013-11-27 | 陈畅 | Circuit for realizing controllable silicon dimming and high-power factor |
-
2009
- 2009-07-31 CN CN2009201343516U patent/CN201438773U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861024A (en) * | 2010-06-02 | 2010-10-13 | 艾迪光电（杭州）有限公司 | Centralized control dimming system of LED |
| CN101861024B (en) * | 2010-06-02 | 2013-12-11 | 浙江思朗照明有限公司 | Centralized control dimming system of LED |
| CN103415128A (en) * | 2013-09-02 | 2013-11-27 | 陈畅 | Circuit for realizing controllable silicon dimming and high-power factor |
| CN103415128B (en) * | 2013-09-02 | 2015-04-22 | 陈畅 | Circuit for realizing controllable silicon dimming and high-power factor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20180731 |