CN103826354A - LED constant current source - Google Patents
LED constant current source Download PDFInfo
- Publication number
- CN103826354A CN103826354A CN201210469713.3A CN201210469713A CN103826354A CN 103826354 A CN103826354 A CN 103826354A CN 201210469713 A CN201210469713 A CN 201210469713A CN 103826354 A CN103826354 A CN 103826354A
- Authority
- CN
- China
- Prior art keywords
- unit
- switch
- connect
- energy
- led
- 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.)
- Pending
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an LED constant current source. The LED constant current source includes a first switch, a rectifying unit, a filtering unit, a DC-to-DC conversion unit, a control unit, a drive unit, a sampling unit, a protection unit, a solar panel, an energy storage unit, a second switch, a switching unit, an LED and an energy storage management unit, wherein the energy storage unit is a storage battery unit. According to the LED constant current source provided by the invention, the current sampling unit samples output current and feeds back sampling results to the control unit, and therefore, the consistency of the brightness of the LED can be effectively ensured; and at the same time, the solar panel which can concentrate solar energy is adopted as a standby power source for a normal switching power source power supplying loop, such that energy-saving circuit and environmental-protection properties can be realized, and therefore, when the normal power supplying loop is interrupted, electric energy converted from solar energy can be fully utilized to supply a power source for the LED, and reliable power supplying can be realized, and cost can be saved, and the LED constant current source is suitable for wide popularization.
Description
Technical field
The present invention relates to a kind of LED constant-current source.
Background technology
In recent years, Switching Power Supply and LED are in the fast development of electronics every profession and trade, LED has wide market prospects as green illumination light source, in the face of energy starved global problems are effectively applied to energy saving means the demand that meets people in LED power supply and pursue energy-conserving and environment-protective, also more promote the promotion and application of LED product simultaneously.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of LED constant-current source of energy-conserving and environment-protective.
Technological means of the present invention is as follows:
A kind of LED constant-current source, comprising:
Connect utility grid, the first switch switching on and off for controlling mains-supplied loop;
Connect the first switch, for the rectification unit that in the time that the first switch is closed, input civil power is carried out to rectification;
Connect rectification unit, for the filter unit that the Rectified alternating current of rectification unit output is carried out to filtering;
Connect filter unit, for the DC-DC converter unit that the direct current of filter unit output is carried out to DC power supply conversion;
Connect current sampling unit and protected location, for the control unit of the DC voltage conversion of DC-DC converter unit being controlled according to the guard signal of the current signal of current sampling unit feedback and protected location output;
Connection control unit, drives the driver element of DC-DC converter unit for amplifying the control signal of control unit output;
Connect DC-DC converter unit, for the signal of telecommunication of DC-DC converter unit output being carried out to current sampling and feeding back to the sampling unit of control unit;
Connect current sampling unit, compare when exceeding while protecting limit value output protection signal to the protected location of control unit for the signal of telecommunication to current sampling unit feedback and protection limit value;
Be used for the solar panel that absorbs solar energy and be converted into electric energy;
Connect solar panel, for the energy-storage units that solar panel output electric energy is stored;
Connect energy-storage units, the second switch switching on and off for controlling solar powered loop;
Connect respectively utility grid, the first switch and second switch, for realize the switch unit that mains-supplied loop and solar powered loop are switched according to the closed and disconnected of break-make control first switch in mains-supplied loop and second switch;
Connect solar powered loop and the LED that is connected DC-DC converter unit output by second switch;
In addition, also comprise the energy storage administrative unit that connects energy-storage units;
Further, described energy-storage units is storage battery.
Owing to having adopted technique scheme, a kind of LED constant-current source provided by the invention, by utilizing current sampling unit to sample output current and feeding back to control unit, effectively guarantee the luminosity consistency of LED, be provided with the solar panel that can assemble solar energy as the stand-by power supply in normal switch Power supply loop simultaneously, energy-conserving and environment-protective, make to make full use of the electric energy that solar energy changes and provide power supply into LED in the time that interrupt in normal power supply loop, power supply is reliable, and is cost-savingly suitable for extensive popularization.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Embodiment
A kind of LED constant-current source as shown in Figure 1, comprising: connect utility grid, the first switch switching on and off for controlling mains-supplied loop; Connect the first switch, for the rectification unit that in the time that the first switch is closed, input civil power is carried out to rectification; Connect rectification unit, for the filter unit that the Rectified alternating current of rectification unit output is carried out to filtering; Connect filter unit, for the DC-DC converter unit that the direct current of filter unit output is carried out to DC power supply conversion; Connect current sampling unit and protected location, for the control unit of the DC voltage conversion of DC-DC converter unit being controlled according to the guard signal of the current signal of current sampling unit feedback and protected location output; Connection control unit, drives the driver element of DC-DC converter unit for amplifying the control signal of control unit output; Connect DC-DC converter unit, for the signal of telecommunication of DC-DC converter unit output being carried out to current sampling and feeding back to the sampling unit of control unit; Connect current sampling unit, compare when exceeding while protecting limit value output protection signal to the protected location of control unit for the signal of telecommunication to current sampling unit feedback and protection limit value; Be used for the solar panel that absorbs solar energy and be converted into electric energy; Connect solar panel, for the energy-storage units that solar panel output electric energy is stored; Connect energy-storage units, the second switch switching on and off for controlling solar powered loop; Connect respectively utility grid, the first switch and second switch, for realize the switch unit that mains-supplied loop and solar powered loop are switched according to the closed and disconnected of break-make control first switch in mains-supplied loop and second switch; Connect solar powered loop and the LED that is connected DC-DC converter unit output by second switch; In addition, also comprise the energy storage administrative unit that connects energy-storage units; Further, described energy-storage units is storage battery.
A kind of LED constant-current source provided by the invention, by utilizing current sampling unit to sample output current and feeding back to control unit, effectively guarantee the luminosity consistency of LED, be provided with the solar panel that can assemble solar energy as the stand-by power supply in normal switch Power supply loop simultaneously, energy-conserving and environment-protective, make to make full use of the electric energy that solar energy changes and provide power supply into LED in the time that interrupt in normal power supply loop, power supply is reliable, and is cost-savingly suitable for extensive popularization.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. a LED constant-current source, is characterized in that comprising:
Connect utility grid, the first switch switching on and off for controlling mains-supplied loop;
Connect the first switch, for the rectification unit that in the time that the first switch is closed, input civil power is carried out to rectification;
Connect rectification unit, for the filter unit that the Rectified alternating current of rectification unit output is carried out to filtering;
Connect filter unit, for the DC-DC converter unit that the direct current of filter unit output is carried out to DC power supply conversion;
Connect current sampling unit and protected location, for the control unit of the DC voltage conversion of DC-DC converter unit being controlled according to the guard signal of the current signal of current sampling unit feedback and protected location output;
Connection control unit, drives the driver element of DC-DC converter unit for amplifying the control signal of control unit output;
Connect DC-DC converter unit, for the signal of telecommunication of DC-DC converter unit output being carried out to current sampling and feeding back to the sampling unit of control unit;
Connect current sampling unit, compare when exceeding while protecting limit value output protection signal to the protected location of control unit for the signal of telecommunication to current sampling unit feedback and protection limit value;
Be used for the solar panel that absorbs solar energy and be converted into electric energy;
Connect solar panel, for the energy-storage units that solar panel output electric energy is stored;
Connect energy-storage units, the second switch switching on and off for controlling solar powered loop;
Connect respectively utility grid, the first switch and second switch, for realize the switch unit that mains-supplied loop and solar powered loop are switched according to the closed and disconnected of break-make control first switch in mains-supplied loop and second switch;
Connect solar powered loop and the LED that is connected DC-DC converter unit output by second switch.
2. a kind of LED constant-current source according to claim 1, characterized by further comprising the energy storage administrative unit that connects energy-storage units.
3. a kind of LED constant-current source according to claim 1, is characterized in that described energy-storage units is storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469713.3A CN103826354A (en) | 2012-11-19 | 2012-11-19 | LED constant current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469713.3A CN103826354A (en) | 2012-11-19 | 2012-11-19 | LED constant current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103826354A true CN103826354A (en) | 2014-05-28 |
Family
ID=50761107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210469713.3A Pending CN103826354A (en) | 2012-11-19 | 2012-11-19 | LED constant current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103826354A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503337A (en) * | 2014-12-31 | 2015-04-08 | 桂林铭瑶电子科技有限公司 | Numerically controlled constant current source circuit based on DSP |
| CN104536323A (en) * | 2014-12-31 | 2015-04-22 | 桂林铭瑶电子科技有限公司 | Numerical control constant-current source device based on ARM9 |
| CN111371094A (en) * | 2020-04-22 | 2020-07-03 | 深圳创维－Rgb电子有限公司 | Double-power-supply system and television |
| CN111684865A (en) * | 2018-02-07 | 2020-09-18 | 昕诺飞控股有限公司 | Lighting system and method |
-
2012
- 2012-11-19 CN CN201210469713.3A patent/CN103826354A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503337A (en) * | 2014-12-31 | 2015-04-08 | 桂林铭瑶电子科技有限公司 | Numerically controlled constant current source circuit based on DSP |
| CN104536323A (en) * | 2014-12-31 | 2015-04-22 | 桂林铭瑶电子科技有限公司 | Numerical control constant-current source device based on ARM9 |
| CN111684865A (en) * | 2018-02-07 | 2020-09-18 | 昕诺飞控股有限公司 | Lighting system and method |
| CN111371094A (en) * | 2020-04-22 | 2020-07-03 | 深圳创维－Rgb电子有限公司 | Double-power-supply system and television |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102711321B (en) | Light emitting diode driving circuit | |
| CN102917503B (en) | LED driver system with energy storage function | |
| CN104427699B (en) | LED signal lamp and its LED drive circuit | |
| CN101720154A (en) | Emergency power supply switching circuit and LED drive circuit thereof | |
| US8614549B2 (en) | Emergency illumination system based on LED combined LED lamps | |
| CN103826354A (en) | LED constant current source | |
| CN202514138U (en) | Drive power supply for non-electrolytic capacitor | |
| CN202310206U (en) | Control circuit of ultra-low-power single wire power supply touch switch | |
| CN204761752U (en) | Low -voltage building site LED light drive power supply | |
| CN202406045U (en) | Wide voltage input self-adaptive dynamic energy-saving lighting power supply device | |
| CN101777846B (en) | System and method for controlling switch power supply | |
| CN201611842U (en) | Multichannel auxiliary switch power powered by commercial power and batteries | |
| CN101087101B (en) | Power supplier reducing the energy consumption of power status display device | |
| CN203660640U (en) | Economical power failure maintenance circuit | |
| CN202050366U (en) | Forward structure switch power supply circuit | |
| CN202663614U (en) | Low-power light emitting diode (LED) constant-current power supply | |
| CN202475906U (en) | Light emitting diode (LED) emergency lighting system | |
| CN202310219U (en) | Multifunctional light emitting diode lighting lamp | |
| CN205142032U (en) | Input/output current-limiting voltage-stabilizing power supply | |
| US20110255317A1 (en) | Intelligent multi-stage variable-power switch power supply device | |
| CN203014706U (en) | Power supply device with high efficiency alternating current and direct current same port input for cameras | |
| CN202095016U (en) | TV set with LED illumination drive and control function | |
| CN202799282U (en) | Drive circuit for luminescence diode | |
| CN202750024U (en) | Power supply device and plasma display device | |
| CN101807803A (en) | Switch control power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140528 |