CN103298179A - LED illuminating device and light failure control method thereof - Google Patents
LED illuminating device and light failure control method thereof Download PDFInfo
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- CN103298179A CN103298179A CN2012100420418A CN201210042041A CN103298179A CN 103298179 A CN103298179 A CN 103298179A CN 2012100420418 A CN2012100420418 A CN 2012100420418A CN 201210042041 A CN201210042041 A CN 201210042041A CN 103298179 A CN103298179 A CN 103298179A
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Abstract
The invention discloses an LED illuminating device and a light failure control method of the LED illuminating device. The LED illuminating device comprises at least one LED luminescent tube, a temperature detecting module and a control module, wherein the temperature detecting module is used for detecting the temperature in the LED illuminating device, and the control module is used for adjusting the power of the at least one LED luminescent tube according to the temperature detected by the temperature detecting module so as to control the light failure of the LED illuminating device. The LED illuminating device and the light failure control method of the LED illuminating device achieve the effects of controlling the light failure of the LED luminescent tube and prolonging the service life of the LED illuminating device.
Description
Technical field
The present invention relates to lighting technical field, more specifically, relate to a kind of LED lighting device and light decay control method thereof.
Background technology
In recent years, along with the popularization of power-saving technology, the energy-saving lighting design has become the research emphasis of field of illuminating lamps.LED is subject to the people's attention in the energy-saving lighting design because it has advantages such as luminous efficiency height, good energy-conserving effect, environmental protection.Using LED to make illuminating lamp and replace traditional illuminating lamp, is the development trend of current lighting technical field.
But well-known LED has certain light decay in use.The LED light decay refers to LED after lighting after a while, and its brightness meeting is lower than original brightness, and low part is exactly the light decay of LED.This light decay has bigger difference according to different products and service condition.If the light decay of LED is not controlled, acquire a certain degree, will influence the useful life of LED lighting device, cause the LED lighting device to be scrapped in advance.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of LED lighting device and light decay control method thereof, can solve exist in the prior art because the LED light decay causes the problem that shortens the useful life of LED lighting device.
For achieving the above object, technical scheme of the present invention is achieved in that
On the one hand, provide a kind of LED lighting device, having comprised: at least one LED luminous tube, and: temperature detecting module, for detection of the temperature in the LED lighting device; Control module is used for according to the detected temperature of temperature detecting module, regulates the power of at least one LED luminous tube, with the light decay of control LED lighting device.
On the other hand, also provide a kind of light decay control method of LED lighting device, having comprised: detected the temperature in the LED lighting device; According to detected temperature, regulate the power of at least one the LED luminous tube in the LED lighting device, with the light decay of control LED lighting device.
Technique effect of the present invention: increased temperature detection in the LED lighting device of the embodiment of the invention, by being set, temperature detecting module detects LED lighting device temperature inside, self produce the temperature that heat causes when being the work of LED luminous tube, regulate the power of LED luminous tube according to the variation of internal temperature, thereby reached the light decay of control LED luminous tube, the effect that prolongs the useful life of LED lighting device.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation according to the LED lighting device of embodiments of the invention one;
Fig. 2 shows the structural representation according to the LED lighting device of embodiments of the invention two;
Fig. 3 shows the structural representation according to the LED lighting device of embodiments of the invention three;
Fig. 4 shows the flow chart according to the light decay control method of the LED lighting device of embodiments of the invention four;
Fig. 5 shows the concrete process chart according to the light decay control method of the LED lighting device of embodiments of the invention five.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Embodiment one
Fig. 1 shows the structural representation according to the LED lighting device of embodiments of the invention one, comprising: at least one LED luminous tube 10, temperature detecting module 20 and control module 30, wherein:
Control module 30 is used for according to temperature detecting module 20 detected temperature, regulates the power of at least one LED luminous tube 10, with the light decay of control LED lighting device.
When practical application, temperature detecting module is preferably disposed on the closer position of distance L ED luminous tube, and like this, it is more accurate self to produce the temperature that heat causes during detected LED work.
In general, the temperature of the environment for use of LED lighting device is more high, and light decay is just more big.The temperature of environment for use comprises: self produce the temperature that heat causes when ambient temperature and LED work.Increased temperature detection in the LED lighting device of the embodiment of the invention, by being set, temperature detecting module detects LED lighting device temperature inside, self produce the temperature that heat causes when being the work of LED luminous tube, regulate the power of LED luminous tube according to the variation of internal temperature, thereby reached the light decay of control LED luminous tube, the effect that prolongs the useful life of LED lighting device.
Embodiment two
As shown in Figure 2, the control module 30 among the embodiment one may further include: single-chip microcomputer 302 and led drive circuit 304, wherein:
Single-chip microcomputer 302 is used for C.T detection module 20 detected lighting devices inner current temperature T and the nominal temperature T that presets
MarkSize, the temperature T current in inside is greater than nominal temperature T
MarkThe time, by the power of led drive circuit 304 at least one LED luminous tube 10 of reduction.
By default nominal temperature T
Mark, when the Current Temperatures T that detects LED lighting device inside greater than T
MarkThe time, think that namely internal temperature is too high, will initiatively reduce the power of LED luminous tube, to reduce the caloric value of LED luminous tube, the control light decay.Thereby the method that adopts derate to use in the LED lighting device has reached the effect that reduces light decay.
In actual applications, in inside current temperature T greater than nominal temperature T
MarkThe time, single-chip microcomputer 302 can calculate the performance number P that at least one LED luminous tube need be reduced to according to following formula (1):
Wherein, P
MarkBe the nominal power of predetermined LED luminous tube, P
MarkBe not more than the rated power of LED luminous tube, T is the inner current temperature of LED lighting device, T
MarkBe nominal temperature.T
MarkWhen preestablishing, the working temperature of the LED that can recommend according to product manual is set.
Be not more than nominal temperature T in current temperature T
MarkThe time, single-chip microcomputer 302 can also recover the power of at least one LED luminous tube or is maintained default nominal power P by led drive circuit 304
Mark
In actual implementation process, single-chip microcomputer can be carried out above-mentioned judgement according to the default time interval, regulate flow process,, at set intervals, judges current temperature T and T that is
MarkSize, at T greater than T
MarkThe time, think that internal temperature is too high, calculate P according to above-mentioned formula (1), and by led drive circuit the power of at least one LED luminous tube is reduced to P, to reduce the caloric value of LED; Be not more than T at T
MarkThe time, think that namely internal temperature recovers normal, the power of at least one LED luminous tube can be brought up to normal level, namely recover or be maintained default nominal power P
Mark
The LED lighting device of the embodiment of the invention, the method for employing temperature control, derate reduces the light decay of LED, has prolonged the useful life of LED lighting device.
Embodiment three
As shown in Figure 3, the temperature detecting module among the embodiment one and two can be 1-wire temperature sensor, is the 1-wire temperature sensor (representing with IC1 among Fig. 3) of DS18B20 for model for example, mainly for detection of the variation of LED lighting device temperature inside.Can select the temperature sensor of other models as required for use, the present invention does not do restriction to this yet.The led drive circuit that comprises single-chip microcomputer and adjustable brightness in the control module.
DS18B20 IC1 with detected temperature by and control module between the single-chip microcomputer of bus transfer in the control module, single-chip microcomputer can start following flow process according to certain time interval:
Step 1: calculate the current temperature T in detected inside and nominal temperature T
MarkDifference DELTA T, deposit Δ T in the temperature gap register;
Step 2: according to Δ T and nominal power P
Mark, calculate the setting power value P of new LED lighting device, computational methods are as follows:
At T＞T
MarkThe time,
At T≤T
MarkThe time, P=P
Mark
Step 3: the power of setting at least one LED with the value of the setting power P that calculates by led drive circuit.
Embodiment four
The flow process of the light decay control method of the LED lighting device among the embodiment one to three as shown in Figure 4, may further comprise the steps:
Step S402 detects the temperature in the LED lighting device;
Step S404 according to detected temperature, regulates the power of at least one the LED luminous tube in the LED lighting device, with the light decay of control LED lighting device.
The embodiment of the invention, in the LED lighting device, increased temperature detection, detect LED lighting device temperature inside, self produce the temperature that heat causes when being the work of LED luminous tube, regulate the power of LED luminous tube according to the variation of internal temperature, thereby reached the light decay of control LED luminous tube, the effect that prolongs the useful life of LED lighting device.
Embodiment five
The LED lighting device need be set nominal temperature value T according to the working temperature that the LED product manual is recommended before work
Mark, and set one less than the nominal power P of the rated power of LED luminous tube
Mark
As shown in Figure 5, the LED lighting device namely can be carried out following operating procedure and control light decay after starting:
Step S502, temperature control modules detect LED lighting device temperature inside, and send detected temperature in the control module single-chip microcomputer by bus;
Step S504, single-chip microcomputer calculates current actual temperature T and nominal temperature T
MarkDifference DELTA T, and the value of Δ T deposited in the temperature gap register;
Step S506, single-chip microcomputer judge that whether current actual temperature T is greater than nominal temperature T
MarkSize, if, execution in step S508 then, otherwise execution in step S510;
Step S508, single-chip microcomputer reduces the power of at least one LED luminous tube by led drive circuit, returns step S502 then;
Concrete, according to Δ T and nominal power P
Mark, according to the new setting power value of above-mentioned formula (1) calculating LED lighting device, set the power of LED with " the setting power value " that calculate.
Step S510 reverts to nominal power P by led drive circuit with the power of LED
Mark, return step S502 then.
From above description, as can be seen, the above embodiments of the present invention have realized following technique effect: increased temperature detection in the LED lighting device of the embodiment of the invention, by being set, temperature detecting module detects LED lighting device temperature inside, self produce the temperature that heat causes when being the work of LED luminous tube, regulate the power of LED luminous tube according to the variation of internal temperature, thereby controlled the light decay of LED luminous tube effectively, prolong the useful life of LED lighting device greatly, reduced the replacing frequency of LED light units.Popularization to LED has tangible positive role.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a LED lighting device is characterized in that, comprising: at least one LED luminous tube, and:
Temperature detecting module is for detection of the temperature in the described LED lighting device;
Control module is used for according to the detected temperature of described temperature detecting module, regulates the power of described at least one LED luminous tube, to control the light decay of described LED lighting device.
2. LED lighting device according to claim 1 is characterized in that, described control module comprises: single-chip microcomputer and led drive circuit, wherein:
Described single-chip microcomputer, the size of the nominal temperature that is used for temperature current in the detected described lighting device of more described temperature detecting module and presets, during greater than described nominal temperature, reduce the power of described at least one LED luminous tube in described current temperature by described led drive circuit.
3. LED lighting device according to claim 2 is characterized in that, described single-chip microcomputer specifically is used for calculating the performance number P that described at least one LED luminous tube need be reduced to according to following formula:
Wherein, P
MarkBe the nominal power of predetermined LED luminous tube, P
MarkBe not more than the rated power of LED luminous tube, T is described current temperature, T
MarkBe described nominal temperature.
4. according to claim 2 or 3 described LED lighting devices, it is characterized in that, described single-chip microcomputer also is used for when described current temperature is not more than described nominal temperature, by described led drive circuit will described at least one LED luminous tube the power recovery or be maintained default nominal power.
5. LED lighting device according to claim 1 is characterized in that, described temperature detecting module is 1-wire temperature sensor.
6. the light decay control method of a LED lighting device is characterized in that, comprising:
Detect the temperature in the described LED lighting device;
According to detected temperature, regulate the power of at least one the LED luminous tube in the described LED lighting device, to control the light decay of described LED lighting device.
7. method according to claim 6 is characterized in that, according to detected temperature, the power of regulating at least one the LED luminous tube in the described LED lighting device comprises:
The size of current temperature and default nominal temperature in the more detected described lighting device;
During greater than described nominal temperature, reduce the power of described at least one LED luminous tube in described current temperature.
8. method according to claim 7, it is characterized in that, during greater than described nominal temperature, the power that reduces described at least one LED luminous tube comprises in described current temperature: calculate the performance number P that described at least one LED luminous tube need be reduced to according to following formula:
9. according to claim 7 or 8 described methods, it is characterized in that according to detected temperature, the power of regulating at least one the LED luminous tube in the described LED lighting device also comprises:
When described current temperature is not more than described nominal temperature, the power of described at least one LED luminous tube recovered or is maintained default nominal power.
10. method according to claim 6 is characterized in that, uses 1-wire temperature sensor to detect the interior temperature of described LED lighting device.
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| CN201210042041.8A CN103298179B (en) | 2012-02-22 | 2012-02-22 | LED light device and light decay control method thereof |
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| CN201210042041.8A CN103298179B (en) | 2012-02-22 | 2012-02-22 | LED light device and light decay control method thereof |
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| CN103298179B CN103298179B (en) | 2016-03-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105407568A (en) * | 2015-11-24 | 2016-03-16 | 贵州剑河县复兴节能照明设备有限公司 | Method for reducing LED headlamp luminous decay |
| CN110139433A (en) * | 2019-05-21 | 2019-08-16 | 上海博灿机器人科技有限公司 | It illuminates fire-fighting robot drop volume and controls lighting device |
| CN112333902A (en) * | 2020-09-25 | 2021-02-05 | 深圳星标科技股份有限公司 | Visual navigation aid equipment dimming method and related device |
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| KR100897471B1 (en) * | 2007-11-14 | 2009-05-14 | 김금수 | Light emitting device with controlling illumination intensity |
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| CN101841962A (en) * | 2010-06-07 | 2010-09-22 | 上海合亚经贸有限公司 | LED lamp control method and device without light decay |
| CN102244960A (en) * | 2011-05-31 | 2011-11-16 | 杨敏 | LED (light-emitting diode) lamp with automatic optical attenuation compensation function and automatic optical attenuation compensation method |
| CN202488826U (en) * | 2012-02-22 | 2012-10-10 | 北京同步科技有限公司 | LED lighting device capable of automatically controlling light attenuation |
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| KR100897471B1 (en) * | 2007-11-14 | 2009-05-14 | 김금수 | Light emitting device with controlling illumination intensity |
| CN101511145A (en) * | 2009-03-19 | 2009-08-19 | 克拉玛依地威诺节能有限责任公司 | Intelligent operation method of high-power LED lighting lamp |
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| CN105407568A (en) * | 2015-11-24 | 2016-03-16 | 贵州剑河县复兴节能照明设备有限公司 | Method for reducing LED headlamp luminous decay |
| CN110139433A (en) * | 2019-05-21 | 2019-08-16 | 上海博灿机器人科技有限公司 | It illuminates fire-fighting robot drop volume and controls lighting device |
| CN110139433B (en) * | 2019-05-21 | 2021-05-07 | 上海博灿机器人科技有限公司 | Derating control lighting device of lighting fire-fighting robot |
| CN112333902A (en) * | 2020-09-25 | 2021-02-05 | 深圳星标科技股份有限公司 | Visual navigation aid equipment dimming method and related device |
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| CN103298179B (en) | 2016-03-02 |
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