CN103338551A - Method employing temperature compensation to stabilize LED lamp temperature - Google Patents
Method employing temperature compensation to stabilize LED lamp temperature Download PDFInfo
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- CN103338551A CN103338551A CN201310214936XA CN201310214936A CN103338551A CN 103338551 A CN103338551 A CN 103338551A CN 201310214936X A CN201310214936X A CN 201310214936XA CN 201310214936 A CN201310214936 A CN 201310214936A CN 103338551 A CN103338551 A CN 103338551A
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to a method employing temperature compensation to stabilize LED lamp temperature. The method comprises steps that: (1), a driver realizes output to an LED module, heat generated by the LED module is transmitted to a wick board through a heat conduction material and then is radiated to the air through heat radiation sheets; (2), when an external heat radiation environment is serious, and temperature of the LED module reaches to setting temperature of a temperature compensation circuit, a temperature probe acquires feedback information, the temperature compensation circuit in the driver carries out real-time temperature compensation; and (3), when temperature is high, a temperature compensation system reduces an output current, temperature rising is limited and reduced, and when the temperature is reduced, the temperature compensation system improves the output current, so the LED module stays in a heat balance state in a safety temperature scope. The method employing temperature compensation to stabilize the LED lamp temperature is advantaged in that: temperature of a large power LED lamp is effectively stabilized; when temperature after rising or reduction exceeds the set control temperature, output of the driver can be improved or reduced; the LED lamp can realize constantly stable and reliable operation; service life and light emitting efficiency of the LED lamp are improved.
Description
Technical field
The present invention relates to relate to the driving method of the band temperature-compensating of power type LED lamp, be specifically related to a kind of method that adopts temperature-compensating to stablize the LED light temperature.
Background technology
Prior art: Natural Heat Convection, to install fan forced heat radiation, heat pipe additional still be the loop heat pipe heat radiation.The shortcoming of above-mentioned technology is: no matter be Natural Heat Convection, install fan forced heat radiation, heat pipe or loop heat pipe heat radiation additional, all can't change a fact, fixing lamp chamber volume and structure thereof, the size of fin and area of dissipation have determined the auxiliary LED lamp that they can only be passive to reduce temperature, cooling extent is limited, and can't change ambient temperature to the influence of LED lamp temperature rise.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, and a kind of method that adopts temperature-compensating to stablize the LED light temperature is provided, utilize technique for temperature compensation, during variation of ambient temperature, automatically adjust the output current of led driver, effectively reduce and limited the temperature rise of high-powered LED lamp.
The objective of the invention is to finish by following technical solution.The method of LED light temperature is stablized in this employing temperature-compensating, and this method step is as follows:
(1), driver outputs to the LED module, the heat that produces on the LED module is transmitted to wick plate by Heat Conduction Material, finally by being rejected heat in the atmosphere by fin;
(2), when extraneous heat dissipation environment is abominable, when the temperature of LED module reached the temperature that temperature-compensation circuit sets, after temp probe obtained feedack, the temperature-compensation circuit of internal drive carried out real-Time Compensation;
(3), during high temperature, temperature compensation system reduces output current, restriction also reduces temperature rise; When temperature reduced, temperature compensation system improved output current, LED module thermal equilibrium state in the temperature province of safety.
In the described temperature-compensation circuit, NPN transistor and aluminium base use as temp probe after being close to thermal coupling; The faint voltage signal of transistor PN junction transfers to the driving power temperature-compensation circuit, temperature-compensation circuit amplifies this voltage signal and exports adequate compensation voltage to the current reference of driving power, change current reference and obtain suitable output current, thereby changed the LED temperature, by continuous feedback, with the temperature stabilization of LED module a suitable scope.
Beneficial effect of the present invention is: the present invention has effectively stablized the temperature of high-powered LED lamp, and temperature raises or reduces when surpassing the control temperature of setting, and can increase or reduce driver output.During high temperature, under the situation that does not influence use, suitably reduce luminous flux and the power consumption of LED lamp, avoided declining and the shortening in useful life because of the overheated LED of causing light.During low temperature, can in safe range, increase luminous flux, obtain better illuminating effect, make that LED stablizes all the time, work reliably under steady temperature.Prolong the LED life-span and improve luminous efficiency.
Description of drawings
Fig. 1 is constant-flow driver driving LED lamp door figure;
Fig. 2 gives LED lamp power supply control principle figure for the LED constant-current supply;
Fig. 3 is temperature compensation principle figure.
Embodiment
The present invention is further elaborated below by embodiment, and embodiment will help to understand the present invention better, but the present invention is not limited only to following embodiment.
High-powered LED lamp is generally with constant current state work, and when ambient temperature changed, the LED forward conduction voltage drop was low, and the LED driving power decreases output voltage, keeps output current substantially and power output is constant.The present invention utilizes technique for temperature compensation, and monitoring LED light temperature feeds back to the LED driving power in real time and carries out the electric current adjusting.During high temperature, temperature compensation system reduces output current, has reached the purpose of restriction and reduction temperature rise; When temperature reduced, temperature compensation system suitably improved output current, LED lamp thermal equilibrium state in the temperature province of safety.
In so continuous electric current and the mutual feedback procedure of temperature, the LED driving voltage in real time and suitable compensation, the LED lamp progressively reaches thermal equilibrium state, and this temperature guarantees in the safe working temperature zone of LED, reaches the purpose that prolongs the LED lamp life-span.
At any time regulate the output current of driver realizes the temperature of LED lamp is controlled by temperature detection.
Fig. 1 is constant-flow driver driving LED lamp door figure, and driver outputs to the LED module, and the heat that produces on the LED module is transmitted to wick plate by good Heat Conduction Material, finally by being rejected heat in the atmosphere by fin.When extraneous heat dissipation environment is abominable, the temperature of LED module can reach the temperature that temperature compensation system is set, and after temp probe obtained feedack, the temperature-compensation circuit of internal drive carried out real-Time Compensation, driver reduces output current, reaches the purpose of restriction and reduction LED module temperature.
Fig. 2 gives LED lamp power supply control principle figure for the LED constant-current supply.Q is NPN transistor among the figure, is close to thermal coupling with aluminium base and handles, and utilizes the negative temperature characteristic (PN junction voltage will descend with pact-2mV/ ° of C speed) of transistor PN junction Vbe voltage, uses as temp probe.
The faint voltage signal of PN junction transfers to the driving power temperature-compensation circuit, temperature-compensation circuit amplifies this voltage signal and exports adequate compensation voltage to the current reference of driving power, thereby change current reference and obtain suitable output current, just changed the LED temperature, like this, by continuous feedback, the temperature of LED can be stabilized in a suitable scope.
Fig. 3 is temperature compensation principle figure, driving power is controlled output current by the temperature information that receives feedback, according to the relation as the almost identical negative temperature characteristic of the PN junction of temperature detection device transistor PN junction and LED, as long as find output current to concern with the PN junction variation of temperature, carry out the suitable compensation circuit design, the temperature that guarantees linearity and solution compensating circuit is floated problem, just can find the relation of temperature and driver output current.
Above-mentioned method has effectively been stablized the temperature of high-powered LED lamp, and temperature raises or reduces when surpassing the control temperature of setting, and can increase or reduce driver output.During high temperature, under the situation that does not influence use, suitably reduce luminous flux and the power consumption of LED lamp, avoided declining and the shortening in useful life because of the overheated LED of causing light.During low temperature, can in safe range, increase luminous flux, obtain better illuminating effect, make that LED stablizes all the time, work reliably under steady temperature.
This kind control model obtains large-scale practical application in the future, and therefore LED illumination also can obtain once lifting to a greater extent.
One, Fa Ming experiment effect
LED lamp with 10W power is example, when ambient temperature drives (band temperature-compensating) at 0-45 ℃, 300ma continuous current, heat-radiating substrate maintains 45 ± 3 ℃, because LED tube core and heat-radiating substrate are combined closely, therefore the LED die temperature is stable, and this temperature is at it below safe working temperature, thereby the life-span is significantly prolonged.Ambient temperature is in the time of 0 ℃, and temperature-compensation circuit is adjusted the driver current benchmark, and drive current rises to 340ma, and therefore light efficiency is risen to 105lm/W, and this moment, heat-radiating substrate also maintained 45 ± 3 ℃.
The performance table
Two, experimental data
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (2)
1. method that adopts temperature-compensating to stablize the LED light temperature, it is characterized in that: this method step is as follows:
(1), driver outputs to the LED module, the heat that produces on the LED module is transmitted to wick plate by Heat Conduction Material, finally by being rejected heat in the atmosphere by fin;
(2), when extraneous heat dissipation environment is abominable, when the temperature of LED module reached the temperature that temperature-compensation circuit sets, after temp probe obtained feedack, the temperature-compensation circuit of internal drive carried out real-Time Compensation;
(3), during high temperature, temperature compensation system reduces output current, restriction also reduces temperature rise; When temperature reduced, temperature compensation system improved output current, LED module thermal equilibrium state in the temperature province of safety.
2. the method for LED light temperature is stablized in employing temperature-compensating according to claim 1, it is characterized in that: in the described temperature-compensation circuit, NPN transistor and aluminium base use as temp probe after being close to thermal coupling; The faint voltage signal of transistor PN junction transfers to the driving power temperature-compensation circuit, temperature-compensation circuit amplifies this voltage signal and exports adequate compensation voltage to the current reference of driving power, change current reference and obtain suitable output current, thereby changed the LED temperature; By continuous feedback, with the temperature stabilization of LED module a suitable scope.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310214936XA CN103338551A (en) | 2013-05-31 | 2013-05-31 | Method employing temperature compensation to stabilize LED lamp temperature |
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| CN201310214936XA CN103338551A (en) | 2013-05-31 | 2013-05-31 | Method employing temperature compensation to stabilize LED lamp temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561510A (en) * | 2013-10-23 | 2014-02-05 | 浙江耀恒光电科技有限公司 | Temperature compensation LED lamp system of body type temperature sampling |
| CN104159361A (en) * | 2014-07-03 | 2014-11-19 | 杭州合睿电子有限公司 | Temperature compensation method for LED drive power supply |
| CN109618480A (en) * | 2019-01-30 | 2019-04-12 | 周志军 | A kind of method of fast and stable fluorescent tube output light intensity |
| CN112791313A (en) * | 2021-01-06 | 2021-05-14 | 江苏希格玛医疗科技有限公司 | LED light source assembly with stable wavelength and intensity and light source system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479432U (en) * | 2009-08-12 | 2010-05-19 | 江苏银佳企业集团有限公司 | Dimmable LED constant current source driver with wide voltage range |
| CN201491346U (en) * | 2009-09-01 | 2010-05-26 | 福建科维光电科技有限公司 | Temperature compensation circuit of LED lamp |
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2013
- 2013-05-31 CN CN201310214936XA patent/CN103338551A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479432U (en) * | 2009-08-12 | 2010-05-19 | 江苏银佳企业集团有限公司 | Dimmable LED constant current source driver with wide voltage range |
| CN201491346U (en) * | 2009-09-01 | 2010-05-26 | 福建科维光电科技有限公司 | Temperature compensation circuit of LED lamp |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561510A (en) * | 2013-10-23 | 2014-02-05 | 浙江耀恒光电科技有限公司 | Temperature compensation LED lamp system of body type temperature sampling |
| CN104159361A (en) * | 2014-07-03 | 2014-11-19 | 杭州合睿电子有限公司 | Temperature compensation method for LED drive power supply |
| CN109618480A (en) * | 2019-01-30 | 2019-04-12 | 周志军 | A kind of method of fast and stable fluorescent tube output light intensity |
| CN112791313A (en) * | 2021-01-06 | 2021-05-14 | 江苏希格玛医疗科技有限公司 | LED light source assembly with stable wavelength and intensity and light source system |
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Application publication date: 20131002 |