CN203407046U - Drive circuit of LED lighting device - Google Patents
Drive circuit of LED lighting device Download PDFInfo
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- CN203407046U CN203407046U CN201320462021.6U CN201320462021U CN203407046U CN 203407046 U CN203407046 U CN 203407046U CN 201320462021 U CN201320462021 U CN 201320462021U CN 203407046 U CN203407046 U CN 203407046U
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Abstract
The utility model discloses a drive circuit of an LED lighting device. The drive circuit comprises an AC power supply, a light regulator and a control circuit. The control circuit comprises a filtering unit, a rectifying unit, a transformer unit, a light regulator phase detection unit and a flyback conversion unit. One end of the flyback conversion unit is connected with the light regulator phase detection unit, and the other end is connected with the primary of the transformer unit and a first transistor. The first transistor comprises a grid electrode, a drain electrode and a source electrode. The grid electrode of the first transistor is connected with the flyback conversion unit. The drain electrode of the first transistor is connected with the primary of the transformer unit. The flyback conversion unit receives a voltage signal outputted by the light regulator phase detection unit. Then according to the voltage signal, current through the transformer unit and the first transistor is adjusted so that size of output current of the drive circuit is controlled. An existing lighting device and layout do not need to be changed so that the drive circuit of the LED lighting device is convenient to install. Besides, the existing light regulator can be utilized to control light regulation and color regulation of the LED lighting device.
Description
Technical field
The utility model relates to LED lighting technical field, particularly a kind of drive circuit of LED lighting device.
Background technology
LED due to have energy-saving and environmental protection, can be light-operated, the lot of advantages such as solidification, long-life, in the today of advocating low-carbon (LC) life, be widely used in various lighting fields.
In the prior art, the holder structure of LED lamp is generally designed to the holder structure identical with original illuminating lamp such as incandescent lamp, electricity-saving lamp, LED lamp directly can be replaced like this to original illuminating lamp, is not only convenient to install, and does not change the structure of original illuminator.
But LED lamp is directly replaced after original illuminating lamp, the dimming function of the LED lamp after replacement cannot be brought into play, if LED lamp is carried out to light modulation, must in original illuminator, access in addition dimmer, so just increased the use cost of LED lamp, and when mounted LED lamp, also need professional installation personnel that dimmer is installed, install complicated.In addition, with LED lamp, directly replace after original illuminating lamp, cannot utilize existing dimmer to the control of mixing colours of LED lamp.
Utility model content
The utility model has overcome above-mentioned the deficiencies in the prior art, and a kind of drive circuit without changing when front lighting device and layout, directly replace the LED lighting device of traditional lighting light source, easy for installation, compatible existing dimmer is provided.
The technical solution of the utility model is achieved in that
A drive circuit for LED lighting device, for driving LED lighting device, comprises AC power, dimmer and control circuit, and described LED lighting device comprises a LED module and the 2nd LED module that colour temperature is different, and described control circuit comprises:
Filter unit, for carrying out exporting filtering from dimmer voltage signal out;
Rectification unit, the signal of the unit output that accepts filter is also rectified into direct current signal, then output;
Transformer unit, is connected with rectification unit, comprises elementary and secondary;
Dimmer phase detection unit, for sampling K point voltage signal after rectification, and exports after converting thereof into low-voltage signal; And:
Flyback converting unit, one end is connected with dimmer phase detection unit, the other end is connected with the elementary and the first transistor of transformer unit, described the first transistor is field effect transistor, the first transistor comprises grid, drain electrode and source electrode, the grid of described the first transistor is connected with described flyback converting unit, and the drain electrode of described the first transistor is connected with described transformer unit is elementary; This flyback converting unit receives the voltage signal of dimmer phase detection unit output, then according to this voltage signal, regulates the size of current that flows through transformer unit and the first transistor, thereby controls the output current size of drive circuit.
As preferably, described control circuit also comprises: described control circuit also comprises: color control unit, transistor seconds, the first current measuring element and the second current measuring element, described transistor seconds is field effect transistor, comprise grid, drain electrode and source electrode, the grid of described transistor seconds is connected with described color control unit, the drain electrode of described transistor seconds is connected with a described LED module, one end of described the first current measuring element is connected with the secondary of transformer unit, the other end is connected with LED lighting device with color control unit, one end of described the second current measuring element is connected with color control unit with the source electrode of transistor seconds, other end ground connection.
Compared to prior art, the utility model is without changing when front lighting device and layout, LED lighting device can directly be replaced traditional lighting light source (for example: incandescent lamp, tungsten halogen lamp), easy for installation, and utilizes existing dimmer to carry out light modulation toning to LED lighting device and control.
Accompanying drawing explanation
Fig. 1 is the driving circuit structure block diagram of the utility model LED lighting device.
Embodiment
Embodiment of the present utility model is as follows:
Embodiment: Fig. 1 is the driving circuit structure block diagram of the utility model LED lighting device, as shown in Figure 1, the drive circuit of the utility model LED lighting device comprises AC power 1, dimmer 2 and control circuit 12, wherein, AC power 1 and dimmer 2 are existing control structures in the market, the main utility model point of LED drive circuit of the present utility model is control circuit 12 below, this control circuit 12 comprises filter unit 3, rectification unit 4, the transformer unit 5 being connected with rectification unit 4, dimmer phase detection unit 6, flyback converting unit 7, color control unit 10, the first transistor 13, transistor seconds 14, the first current measuring element 15 and the second current measuring element 16.Described LED lighting device comprises a LED module 17 and the 2nd LED module 18, wherein a LED module 17 is different with the colour temperature of the 2nd LED module 18, for example a LED module 17 can be warm colour temperature LED lighting device, the 2nd LED module 18 is cool colour temperature LED lighting device, but the colour temperature of the LED in same LED module is identical.
One end of described flyback converting unit 7 is connected with dimmer phase detection unit 6, the other end is connected with the elementary and the first transistor 13 of transformer unit 5, described the first transistor 13 is field effect transistor, the first transistor 13 comprises grid, drain electrode and source electrode, the grid of described the first transistor 13 is connected with described flyback converting unit 7, the drain electrode of described the first transistor 13 and described elementary connection of transformer unit 5.Described transistor seconds 14 is field effect transistor, and transistor seconds 14 comprises grid, drain electrode and source electrode, and the grid of described transistor seconds 14 is connected with described color control unit 10, and the drain electrode of described transistor seconds 14 is connected with a described LED module 17.One end of described the first current measuring element 15 is connected with the secondary of transformer unit 5, the other end of the first current measuring element 15 is connected with LED lighting device with color control unit 10, one end of described the second current measuring element 16 is connected with color control unit 10 with the source electrode of transistor seconds 14, the other end ground connection of the second current measuring element 16.
The drive circuit works process of the utility model LED lighting device is as follows: first drive circuit will carry out filtering in unit 3 after filtering from dimmer 2 voltage signal out, filtering is rectified into direct current signal by over commutation unit 4, then after the 6 sampling rectifications of dimmer phase detection unit, after K point voltage signal, convert thereof into low-voltage signal and be sent to flyback converting unit 7, thereby flyback converting unit 7 regulates the size of current that flows through transformer unit 5 and the first transistor 13 to control the size of current that flows through LED lighting device according to this voltage signal.Thereby the curent change that color control unit 10 detects on first, second current measuring element 15,16 is controlled opening and turn-offing to control the electric current that flows through a LED module 17 of transistor seconds 14, the first current measuring element 15 is for detection of the output current of the drive circuit of the utility model LED lighting device, and the second current measuring element 16 is for detection of the electric current of the LED module 17 of flowing through.
The light modulation color-temperature regulating control procedure of 12 pairs of LED lighting devices of the utility model control circuit is as follows:
When 2 pairs of LED lighting devices of dimmer carry out the control of light modulation color-temperature regulating, the knob of rotary dimmer 2, dimmer 2 is rotated from high luminance area to low-light level district, dimmer phase detection unit 6 detects K point voltage signal, dimmer phase detection unit 6 converts the cut signal of dimmer 2 to voltage signal and sends flyback converter 7 to, flyback converter 7 regulates the work pulsewidth of flyback converter 7 according to the size of the voltage signal receiving, thereby reduces the size of drive circuit output current.The first current measuring element 15 detects drive circuit output current and diminishes, color control unit 10 is opened and is controlled transistor seconds 14 according to the variation of the first current measuring element 15 current signals that receive, when the second current measuring element 16 detects while flowing through LED module 17 curent change, the size of current that color control unit 10 detects according to the second current measuring element 16 is controlled the size of current of the LED module 17 of flowing through.
When dimmer 2 continues to rotate to low-light level district, the output current of drive circuit continues to reduce, first, second current measuring element 15,16 continues to detect electric current, when the output current of drive circuit is during lower than the control electric current of a LED module, color control unit 10 is no longer controlled the electric current of the LED module 17 of flowing through, make the output current LED module 17 of flowing through completely, the 2nd LED module 18 of no longer flowing through, thus continue to change the color state of LED lighting device.While supposing that dimmer 2 rotates from low-light level district to high luminance area, adjustment process is contrary with said process.If dimmer 2 is slidingtype phase-cut dimming devices, principle is similar, and we just can utilize traditional dimmers to carry out the control in brightness to LED lighting device like this, change the colour temperature of LED lighting device simultaneously.
In addition, in the present embodiment, LED lighting device comprises two LED modules, also a plurality of LED modules can be set as required.
The utility model preferred embodiment is just for helping to set forth the utility model.Preferred embodiment does not have all details of detailed descriptionthe, and also not limiting this utility model is only described embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiment are chosen and specifically described to this specification, is in order to explain better principle of the present utility model and practical application, thereby under making, technical field technical staff can utilize the utility model well.The utility model is only subject to the restriction of claims and four corner and equivalent.Disclosed is above only several specific embodiments of the application, but the application is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in the application's protection range.
Claims (2)
1. the drive circuit of a LED lighting device, for driving LED lighting device, comprise AC power, dimmer and control circuit, it is characterized in that: described LED lighting device comprises a LED module and the 2nd LED module that colour temperature is different, and described control circuit comprises:
Filter unit, for carrying out exporting filtering from dimmer voltage signal out;
Rectification unit, the signal of the unit output that accepts filter is also rectified into direct current signal, then output;
Transformer unit, is connected with rectification unit, comprises elementary and secondary;
Dimmer phase detection unit, for sampling K point voltage signal after rectification, and exports after converting thereof into low-voltage signal; And:
Flyback converting unit, one end is connected with dimmer phase detection unit, the other end is connected with the elementary and the first transistor of transformer unit, described the first transistor is field effect transistor, the first transistor comprises grid, drain electrode and source electrode, the grid of described the first transistor is connected with described flyback converting unit, and the drain electrode of described the first transistor is connected with described transformer unit is elementary; This flyback converting unit receives the voltage signal of dimmer phase detection unit output, then according to this voltage signal, regulates the size of current that flows through transformer unit and the first transistor, thereby controls the output current size of drive circuit.
2. the drive circuit of LED lighting device according to claim 1, it is characterized in that: described control circuit also comprises: color control unit, transistor seconds, the first current measuring element and the second current measuring element, described transistor seconds is field effect transistor, transistor seconds comprises grid, drain electrode and source electrode, the grid of described transistor seconds is connected with described color control unit, the drain electrode of described transistor seconds is connected with a described LED module, one end of described the first current measuring element is connected with the secondary of transformer unit, the other end of the first current measuring element is connected with LED lighting device with color control unit, one end of described the second current measuring element is connected with color control unit with the source electrode of transistor seconds, the other end ground connection of the second current measuring element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320462021.6U CN203407046U (en) | 2013-07-30 | 2013-07-30 | Drive circuit of LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320462021.6U CN203407046U (en) | 2013-07-30 | 2013-07-30 | Drive circuit of LED lighting device |
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| Publication Number | Publication Date |
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| CN203407046U true CN203407046U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320462021.6U Expired - Fee Related CN203407046U (en) | 2013-07-30 | 2013-07-30 | Drive circuit of LED lighting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415111A (en) * | 2013-07-30 | 2013-11-27 | 浙江生辉照明有限公司 | Drive circuit and drive method of LED illuminating device |
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2013
- 2013-07-30 CN CN201320462021.6U patent/CN203407046U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415111A (en) * | 2013-07-30 | 2013-11-27 | 浙江生辉照明有限公司 | Drive circuit and drive method of LED illuminating device |
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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: 20140122 Termination date: 20190730 |