CN202488826U

CN202488826U - LED lighting device capable of automatically controlling light attenuation

Info

Publication number: CN202488826U
Application number: CN 201220060493
Authority: CN
Inventors: 黄喜荣
Original assignee: Beijing Itsync Technology Co Ltd
Current assignee: Beijing Itsync Technology Co Ltd
Priority date: 2012-02-22
Filing date: 2012-02-22
Publication date: 2012-10-10
Anticipated expiration: 2022-02-22

Abstract

The utility model discloses an LED lighting device capable of automatically controlling light attenuation. The LED lighting device comprises at least one LED, a temperature detection module and a control module. The temperature detection module is used for detecting interior temperature of the LED lighting device, the control module is connected with the temperature detection module and the LEDs and used for adjusting the power of the LEDs according to the temperature detected by the temperature detection module to control light attenuation of the LED lighting device. By the LED lighting device capable of automatically controlling light attenuation, light attenuation of the LEDs is controlled, and the service life of the LED lighting device is prolonged.

Description

Can control the LED lighting device of light decay automatically

Technical field

The utility model relates to lighting technical field, more specifically, relates to a kind of LED lighting device that can control light decay automatically.

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 has received people's attention because it has advantages such as luminous efficiency height, good energy-conserving effect, environmental protection in the energy-saving lighting design.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 is meant 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.

The utility model content

In view of this, the main purpose of the utility model is to provide a kind of LED lighting device that can control light decay automatically, 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, the technical scheme of the utility model is achieved in that

The utility model provides a kind of LED lighting device that can control light decay automatically, comprising: at least one LED luminous tube, and: temperature detecting module is used to detect the temperature in the LED lighting device; Control module is connected with at least one LED luminous tube with temperature detecting module, is used for regulating the power of at least one LED luminous tube according to the detected temperature of temperature detecting module, with the light decay of control LED lighting device.

Wherein, Control module comprises: single-chip microcomputer and led drive circuit; Wherein: single-chip microcomputer, be connected with temperature detecting module, be used for the size of temperature current in the detected lighting device of C.T detection module and preset nominal temperature; During greater than nominal temperature, reduce the power of at least one LED luminous tube in current temperature through led drive circuit; Led drive circuit is connected with at least one LED luminous tube with single-chip microcomputer.

Wherein, single-chip microcomputer specifically is used for calculating the performance number P that 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 current temperature, T _MarkBe nominal temperature.

Wherein, single-chip microcomputer also is used for when current temperature is not more than nominal temperature, the power of at least one LED luminous tube is recovered or is maintained preset nominal power through led drive circuit.

Wherein, temperature detecting module is a 1-wire temperature sensor.

The technique effect of the utility model: increased temperature detection in the LED lighting device of the utility model embodiment; Through 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 the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 shows the structural representation according to the LED lighting device that can control light decay automatically of the embodiment one of the utility model;

Fig. 2 shows the structural representation according to the LED lighting device that can control light decay automatically of the embodiment two of the utility model;

Fig. 3 shows the structural representation according to the LED lighting device that can control light decay automatically of the embodiment three of the utility model;

Fig. 4 shows the flow chart according to the light decay control method of the LED lighting device that can control light decay automatically of the embodiment four of the utility model;

Fig. 5 shows the concrete process chart according to the light decay control method of the LED lighting device that can control light decay automatically of the embodiment five of the utility model.

Embodiment

Below with reference to accompanying drawing and combine embodiment, specify the utility model.

Embodiment one

Fig. 1 shows the structural representation according to the LED lighting device that can control light decay automatically of the embodiment one of the utility model, comprising: at least one LED luminous tube 10, temperature detecting module 20 and control module 30, wherein:

Temperature detecting module 20 is used to detect the temperature in the LED lighting device;

Control module 30 is used for regulating the power of at least one LED luminous tube 10 according to temperature detecting module 20 detected temperature, 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 high more, and light decay is just big more.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 utility model embodiment; Through 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 preset nominal temperature T _MarkSize, the temperature T current in inside is greater than nominal temperature T _MarkThe time, through the power of led drive circuit 304 at least one LED luminous tube 10 of reduction.

Through preset nominal temperature T _Mark, when detecting the inner Current Temperatures T of LED lighting device greater than T _MarkThe time, think that promptly 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 in the LED lighting device, adopts derate to use has reached the effect that reduces light decay.

In practical application, the temperature T current in inside is 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 preset nominal power P through led drive circuit 304 _Mark

In actual implementation process, single-chip microcomputer can be carried out above-mentioned judgement according to the preset 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 the power of at least one LED luminous tube is reduced to P, to reduce the caloric value of LED through led drive circuit; Be not more than T at T _MarkThe time, think that promptly internal temperature recovers normal, can the power of at least one LED luminous tube be brought up to normal level, promptly recover or be maintained preset nominal power P _Mark

The LED lighting device of the utility model embodiment, 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, is mainly used in the variation that detects LED lighting device temperature inside.Can select the temperature sensor of other models as required for use, the utility model is not done qualification to this yet.The led drive circuit that comprises single-chip microcomputer and adjustable brightness in the control module.

DS18B20 IC1 with detected temperature through 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 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 following:

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 through 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 utility model embodiment; In the LED lighting device, increased temperature detection; Detect LED lighting device temperature inside, be i.e. self produce the temperature that heat causes during LED luminous tube work, 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 a nominal power P less than the rated power of LED luminous tube _Mark

As shown in Figure 5, the LED lighting device promptly 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 through 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 returns step S502 then through the power of at least one LED luminous tube of led drive circuit reduction;

Concrete, according to Δ T and nominal power P _Mark,, set the power of LED with " the setting power value " that calculate according to the new setting power value of above-mentioned formula (1) calculating LED lighting device.

Step S510 reverts to nominal power P through led drive circuit with the power of LED _Mark, return step S502 then.

From above description; Can find out; The utility model the above embodiments have realized following technique effect: increased temperature detection in the LED lighting device of the utility model embodiment, detected LED lighting device temperature inside through temperature detecting module is set, be i.e. self produced the temperature that heat causes during LED luminous tube work; Regulate the power of LED luminous tube according to the variation of internal temperature; Thereby controlled the light decay of LED luminous tube effectively, prolonged the useful life of LED lighting device greatly, reduced the replacing frequency of LED light units.Popularization to LED has tangible positive role.

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.

Claims

1. the LED lighting device that can control light decay automatically is characterized in that, comprising:

At least one LED luminous tube, and:

Temperature detecting module is used to detect the temperature in the said LED lighting device;

Control module is connected with said at least one LED luminous tube with said temperature detecting module, is used for regulating the power of said at least one LED luminous tube according to the detected temperature of said temperature detecting module, to control the light decay of said LED lighting device.

2. LED lighting device according to claim 1 is characterized in that, said control module comprises: single-chip microcomputer and led drive circuit, wherein:

Said single-chip microcomputer; Be connected with said temperature detecting module; The size of the nominal temperature that is used for temperature current in the detected said lighting device of more said temperature detecting module and presets; During greater than said nominal temperature, reduce the power of said at least one LED luminous tube in said current temperature through said led drive circuit;

Said led drive circuit is connected with said at least one LED luminous tube with said single-chip microcomputer.

3. LED lighting device according to claim 2 is characterized in that, said single-chip microcomputer specifically is used for calculating the performance number P that said 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 said current temperature, T _MarkBe said nominal temperature.

4. according to claim 2 or 3 described LED lighting devices; It is characterized in that; Said single-chip microcomputer also is used for when said current temperature is not more than said nominal temperature, the power of said at least one LED luminous tube is recovered or is maintained preset nominal power through said led drive circuit.

5. LED lighting device according to claim 1 is characterized in that, said temperature detecting module is a 1-wire temperature sensor.