CN205179417U - AC drive's LED lamp house - Google Patents
AC drive's LED lamp house Download PDFInfo
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- CN205179417U CN205179417U CN201521018508.0U CN201521018508U CN205179417U CN 205179417 U CN205179417 U CN 205179417U CN 201521018508 U CN201521018508 U CN 201521018508U CN 205179417 U CN205179417 U CN 205179417U
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Abstract
The utility model discloses an alternating current driven LED lamp house, it includes lamp house box, LED light source, rectifier unit, energy storage unit and constant current unit, wherein, rectifier unit's input inserts the alternating current of external power source input, and rectifier unit's output is connected to the anode of LED light source, its negative terminal and constant current unit connection, and the energy storage unit is parallelly connected with the LED light source, rectifier unit the power output charges to the energy storage unit to after the voltage of rectifier unit output reached the on -state voltage of LED light source, the LED light source switches on to be lighted, and after the voltage that rectifier unit exported was less than the on -state voltage of LED light source, energy storage device was for the LED light source provides the electric energy, made it continue to switch on and light a period, and the constant current unit switches on the in -process of lighting at the LED light source, carries out the constant current control to the LED light source. The utility model discloses not only can and improve the utilization ratio of electric energy and the luminous efficacy of LED light source, can also further improve the luminescence stability of LED light source.
Description
Technical field
The utility model relates to LED case field, particularly a kind of LED case exchanging driving.
Background technology
In existing lamp box, the drive circuit of LED light source adopts traditional switch constant-current supply technology (AC-DC) usually.The useful life of these drive circuits, this power saving fluorescent lamps causing the actual life of LED illumination product more traditional did not have advantage all well below the useful life of LED itself.Therefore, there has been proposed the first generation LED alternating-current Driving technique of direct for LED incoming transport civil power, this technology can solve the life problems of conventional ADS driving power supply, but drive efficiency is very low, general lower than 70%, and the drive efficiency of switch constant-current supply is greater than 80% usually.LED operating current due to first generation LED alternating-current Driving technique is moment change, an impact can be produced in each cycle of electric main, this has damage to LED its shelf-life, can cause the reduction of LED luminous efficiency, the fluctuation along with civil power can make human eye see obvious flicker simultaneously.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency existing in prior art, a kind of LED case exchanging driving is provided, the electric energy of alternating current fluctuation is absorbed by energy-storage travelling wave tube, reduce alternating current to the impact of LED light source, and when the supply power voltage of LED light source is less than its conducting voltage, for LED light source is powered, make it continue to light, thus improve the utilance of electric energy and the luminous efficiency of LED light source.
In order to realize above-mentioned utility model object, the utility model provides a kind of LED case exchanging driving, and it comprises light box, LED light source, rectification unit, energy-storage units and constant current unit; Wherein, the alternating current of the input access external power source input of described rectification unit, the anode of described LED light source connects the output of described rectification unit, and its negative terminal is connected with described constant current unit, and described energy-storage units is in parallel with described LED light source;
Described rectification unit exports electric energy, described energy-storage units is charged, and after the voltage of described rectification unit output reaches the conducting voltage of described LED light source, described LED light source conducting is lighted, after the conducting voltage of the voltage exported when described rectification unit lower than described LED light source, described energy-storage travelling wave tube provides electric energy for described LED light source, makes it continue conducting and lights a period of time; Further, in the process that described constant current unit is lighted in described LED light source conducting, current constant control is carried out to described LED light source.
According to a kind of concrete execution mode, described LED light source comprises N number of LED lamp bead, and described LED lamp bead is connected successively, and described energy-storage units comprises N number of energy-storage travelling wave tube, and described constant current unit comprises N number of constant-current circuit; Wherein,
The anode of the first LED lamp bead is connected with the output of described rectification unit, and each described LED lamp bead is in parallel with a described energy-storage travelling wave tube respectively, and the negative terminal of each described LED lamp bead is by being connected with a described constant-current circuit, and described constant-current circuit ground connection.
According to a kind of concrete execution mode, described constant-current circuit comprises metal-oxide-semiconductor, steady voltage source+Vref, comparator and sampling resistor; Wherein,
The drain electrode of described metal-oxide-semiconductor is connected with the negative terminal of described LED lamp bead, and its source electrode is by described sampling resistor ground connection; The output of described comparator is connected with the grid of described metal-oxide-semiconductor, and its normal phase input end is connected with described steady voltage source+Vref, and its inverting input is connected with the source electrode of described metal-oxide-semiconductor.
According to a kind of concrete execution mode, described energy-storage travelling wave tube is storage capacitor.
Compared with prior art, the beneficial effects of the utility model:
The utility model absorbs the electric energy of alternating current fluctuation by energy-storage travelling wave tube, reduce alternating current to the impact of LED light source, and when the supply power voltage of LED light source is less than its conducting voltage, for LED light source is powered, make it continue to light, thus improve the utilance of electric energy and the luminous efficiency of LED light source.
And, when LED light source conducting, carry out current constant control by constant-current circuit, improve the stability of photoluminescence of LED light source further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model circuit;
Fig. 2 is the structural representation of the utility model light box;
Fig. 3 is the utility model first embodiment schematic diagram;
Fig. 4 is the utility model second embodiment schematic diagram.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following embodiment, all technology realized based on the utility model content all belong to scope of the present utility model.
The structural representation of the circuit structure diagram of the present utility model shown in composition graphs 1 and Fig. 2 difference and light box; Wherein, the utility model comprises light box, LED light source, rectification unit, energy-storage units and constant current unit; Wherein, the alternating current of the input access external power source input of rectification unit, the anode of LED light source connects the output of rectification unit, and its negative terminal is connected with constant current unit, and energy-storage units is in parallel with LED light source, constant current unit ground connection.
Rectification unit exports electric energy, energy-storage units is charged, and after the voltage of rectification unit output reaches the conducting voltage of LED light source, LED light source conducting is lighted, when rectification unit export voltage lower than the conducting voltage of LED light source after, energy-storage travelling wave tube provides electric energy for LED light source, makes it continue conducting and lights a period of time; Further, in the process that constant current unit is lighted in LED light source conducting, current constant control is carried out to LED light source.
In light box of the present utility model, be provided with some installing racks be parallel to each other, LED light source module is separately fixed between two adjacent installing racks.And light box top is also provided with box body, for installing the electronic units such as colour temperature control unit and driver element, avoids light box to be arranged on outdoor application, when rainwater enters light box, causing the situation of short circuit.
The utility model first embodiment schematic diagram shown in composition graphs 3; Wherein, LED light source comprises N number of LED lamp bead, and LED lamp bead is connected successively, and energy-storage units comprises N number of energy-storage travelling wave tube, and constant current unit comprises N number of constant-current circuit; Wherein,
The anode of the first LED lamp bead is connected with the output of rectification unit, and each LED lamp bead is in parallel with an energy-storage travelling wave tube respectively, and the negative terminal of each LED lamp bead is by being connected with a constant-current circuit, and constant-current circuit ground connection.
In the present embodiment, in the process of the voltage rise of rectification unit output, start to fill energy to the first energy-storage travelling wave tube, when after the conducting voltage reaching the first LED lamp bead, the first LED lamp bead is lighted, first constant-current circuit is started working, and the second energy-storage travelling wave tube starts to fill energy, and when after the conducting voltage reaching the second LED lamp bead, the second LED lamp bead is lighted, second constant-current circuit is started working, and the 3rd energy-storage travelling wave tube starts to fill energy.In the process of the voltage rise of rectification unit output, energy-storage travelling wave tube fills energy successively, and LED lamp bead is lighted one by one.
In the process of the voltage drop of rectification unit output, and when making the voltage at NLED lamp pearl two ends be less than its conducting voltage, by N energy-storage travelling wave tube for NLED lamp pearl provides electric energy, it is made to continue conducting a period of time; When the voltage at local N-1LED lamp pearl two ends is less than its conducting voltage, NLED lamp pearl is extinguished, and N-1 energy-storage travelling wave tube provides electric energy for N-1LED lamp pearl, makes it continue conducting a period of time.In the process of the voltage drop of rectification unit output, energy-storage travelling wave tube is followed successively by the LED lamp bead in parallel with it and powers, and LED lamp bead is extinguished one by one.
In the voltage rise that the utility model exports at rectification unit and decline periodic duty, improve the utilance of power, and provide the luminous efficiency of LED light source significantly.
The utility model second embodiment schematic diagram shown in composition graphs 4; Wherein, constant-current circuit of the present utility model comprises metal-oxide-semiconductor, steady voltage source+Vref, comparator and sampling resistor; Wherein,
The drain electrode of metal-oxide-semiconductor is connected with the negative terminal of LED lamp bead, and its source electrode is by sampling resistor ground connection; The output of comparator is connected with the grid of metal-oxide-semiconductor, and its normal phase input end is connected with steady voltage source+Vref, and its inverting input is connected with the source electrode of metal-oxide-semiconductor.
In the present embodiment, after LED lamp bead conducting, electric current on its corresponding branch road produces a sampling and presses on sampling resistor, this sampling is pressed and inputs to inverting input, with comparing of steady voltage source+Vref, make metal-oxide-semiconductor according to the output of comparator, current constant control is carried out to the electric current on branch road, thus improve the stability of photoluminescence of LED light source further.
In the utility model, energy-storage travelling wave tube adopts storage capacitor, by the absorption of storage capacitor to the electric energy that alternating current fluctuates, reduce alternating current to the impact of LED light source, and when the supply power voltage of LED light source is less than its conducting voltage, for LED light source is powered, make it continue to light, thus improve the utilance of electric energy and the luminous efficiency of LED light source.
By reference to the accompanying drawings embodiment of the present utility model is described in detail above, but the utility model is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (4)
1. exchange a LED case for driving, it is characterized in that, comprise light box, LED light source, rectification unit, energy-storage units and constant current unit; Wherein, the alternating current of the input access external power source input of described rectification unit, the anode of described LED light source connects the output of described rectification unit, and its negative terminal is connected with described constant current unit, and described energy-storage units is in parallel with described LED light source;
Described rectification unit exports electric energy, described energy-storage units is charged, and after the voltage of described rectification unit output reaches the conducting voltage of described LED light source, described LED light source conducting is lighted, after the conducting voltage of the voltage exported when described rectification unit lower than described LED light source, described energy-storage travelling wave tube provides electric energy for described LED light source, makes it continue conducting and lights a period of time; Further, in the process that described constant current unit is lighted in described LED light source conducting, current constant control is carried out to described LED light source.
2. the LED case exchanging driving as claimed in claim 1, it is characterized in that, described LED light source comprises N number of LED lamp bead, and described LED lamp bead is connected successively, and described energy-storage units comprises N number of energy-storage travelling wave tube, and described constant current unit comprises N number of constant-current circuit; Wherein,
The anode of the first LED lamp bead is connected with the output of described rectification unit, and each described LED lamp bead is in parallel with a described energy-storage travelling wave tube respectively, and the negative terminal of each described LED lamp bead is by being connected with a described constant-current circuit, and described constant-current circuit ground connection.
3. the LED case exchanging driving as claimed in claim 2, it is characterized in that, constant-current circuit comprises metal-oxide-semiconductor, steady voltage source+Vref, comparator and sampling resistor; Wherein,
The drain electrode of described metal-oxide-semiconductor is connected with the negative terminal of described LED lamp bead, and its source electrode is by described sampling resistor ground connection; The output of described comparator is connected with the grid of described metal-oxide-semiconductor, and its normal phase input end is connected with described steady voltage source+Vref, and its inverting input is connected with the source electrode of described metal-oxide-semiconductor.
4. the LED case exchanging driving as claimed in claim 2, it is characterized in that, described energy-storage travelling wave tube is storage capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018508.0U CN205179417U (en) | 2015-12-09 | 2015-12-09 | AC drive's LED lamp house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018508.0U CN205179417U (en) | 2015-12-09 | 2015-12-09 | AC drive's LED lamp house |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205179417U true CN205179417U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521018508.0U Expired - Fee Related CN205179417U (en) | 2015-12-09 | 2015-12-09 | AC drive's LED lamp house |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205179417U (en) |
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2015
- 2015-12-09 CN CN201521018508.0U patent/CN205179417U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20181209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |