CN201365363Y

CN201365363Y - Intelligent led illuminating driver

Info

Publication number: CN201365363Y
Application number: CNU2009200520871U
Authority: CN
Inventors: 陈迪泉; 钱静; 钟卓鹏
Original assignee: FUDAN AOTE SCIENCE AND TECHNOLOGY Co Ltd GUANGZHOU
Current assignee: FUDAN AOTE SCIENCE AND TECHNOLOGY Co Ltd GUANGZHOU
Priority date: 2009-03-04
Filing date: 2009-03-04
Publication date: 2009-12-16
Anticipated expiration: 2019-03-04

Abstract

The utility model discloses an intelligent LED illuminating driver, which comprises a controller (1), an LED chip temperature detector (2) and an LED power regulator (3), wherein the LED chip temperature detector (2) outputs a signal to the controller (1); and the controller (1) outputs a signal to the LED power regulator (3). The utility model can automatically regulate the temperature when an LED chip works normally, and ensure that the PN junction temperature of the LED chip does not exceed a specified value, thereby effectively protecting the PN junction of the LED chip against thermal breakdown and advanced light degradation, and improving luminous efficiency of an LED, prolonging the service lift of the LED chip, and fully taking the advantages of low illumination light degradation, stable light emission and long service life of an LED semiconductor. Furthermore, the utility model can also increase the function of automatically detecting and regulating illumination, thereby ensuring that the illumination of the LED semiconductor can not only meet the requirement of residential illumination for brightness value, but also save energy reasonably.

Description

The intelligent LED illumination driver

Technical field

The utility model relates to the driver of the lighting that a kind of LED uses, and specifically is meant a kind of intelligent LED illumination driver.

Background technology

LED band-to-band transition producing light, does not comprise infrared part by electronics in its spectrum, the heat of LED can not shed in radiation, so LED is " cold " light source.At present the luminous efficiency of LED only can reach about 20%, that is to say to also have nearly 80% power conversion to become heat energy.Because the size of led chip is very little, it is quite concentrated to generate heat, especially high-power LED chip, when normal the use if can not in time heat be come out, these heat energy will cause the temperature of led chip (or module) to rise, and the temperature rising will cause operating voltage to reduce, light intensity reduces, luminous efficiency reduces.Can quicken the light decay of LED simultaneously, even, have a strong impact on the normal useful life of LED the PN junction thermal breakdown of LED.The PN junction temperature of usually general led chip can not be above 125 ℃.

Outside the Pass the junction temperature of led chip PN junction was removed and to be had with the package cooling technology of led chip itself etc., the operating current of LED outside radiating condition big or small and led chip was also closely related during with normal the use.If the heat of led chip can not in time shed by external environment condition, the aging chip failure that makes that will speed-up chip.Therefore, for guaranteeing the useful life of LED, a key factor of having dispelled the heat and having used into great power LED.

The LED luminescent device is as a kind of novel light source, and it can reach 100,000 hours in theory useful life, but during actual the use because heat dissipation environment is bad, not only luminous efficiency reduces, light decay is very serious, and also shortens greatly useful life.Can only reach about 10000 hours.

The utility model content

The purpose of this utility model is to provide a kind of can regulate the intelligent LED illumination driver that LED power reaches control led chip working temperature according to the led chip temperature.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the intelligent LED illumination driver, comprise controller, led chip Temperature Detector and LED power governor, described led chip Temperature Detector outputs signal to controller, and described controller output signal is given the LED power governor.

The utility model also comprises the ambient light illumination detector, and described ambient light illumination detector output signal is given controller.

Owing to adopted above-mentioned structure, when the utility model uses, the led chip Temperature Detector can detect the temperature of led chip, the led chip Temperature Detector is exported to controller with detected temperature signal, controller is according to default program running, when the led chip temperature drift surpasses permissible value, described controller output signal is given the LED power governor, automatically regulate the operating current of led chip or the duty ratio that PWM regulates, the caloric value of led chip is reduced, thereby the PN junction temperature of controlling led chip automatically is in the ideal value scope.Described ambient light illumination detector can detect operational environment illumination, and detected signal is exported to controller.When operational environment illumination changes, controller output signal is regulated the operating current of led chip or the duty ratio that PWM regulates automatically to the LED power governor, the luminous intensity of LED is changed, thereby the brightness value of automatic Control work environment, the brightness value that makes operational environment had both satisfied the requirement of illumination index, again saves energy effectively.

The utility model can automatically adjust to the temperature of led chip when the operate as normal; the PN junction temperature of guaranteeing led chip is no more than setting; thereby thermal breakdown can not take place and occur light decay in advance in the PN junction of effectively protecting led chip; improve the luminous efficiency of LED; prolong the useful life of led chip, fully excavate the advantage of little, luminous stable, the long service life of LED semiconductor lighting light decay.The utility model also can increase illuminance and detect automatically and regulatory function, makes the LED semiconductor lighting both satisfy the requirement of lighting of home to brightness value, again can be rationally energy-conservation.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is the circuit frame figure of intelligent LED illumination driver.

Embodiment

As shown in Figure 1, intelligent LED illumination driver described in the utility model, comprise controller 1, led chip Temperature Detector 2 and LED power governor 3, described led chip Temperature Detector 2 outputs signal to controller 1, and described controller 1 outputs signal to LED power governor 3.

Led chip Temperature Detector 2 can detect the temperature of led chip, led chip Temperature Detector 2 is exported to controller 1 with detected temperature signal, controller 1 is according to default program running, when the led chip temperature drift surpasses permissible value, described controller 1 outputs signal to LED power governor 3, automatically regulate the operating current of led chip or the duty ratio that PWM regulates, the caloric value of led chip is reduced, thereby the PN junction temperature of controlling led chip automatically is in the ideal value scope, improve the light decay performance of led chip, improve the luminous efficiency of LED, prolong the useful life of led chip, it is little fully to excavate LED semiconductor lighting light decay, luminous stable, the advantage of long service life.

As further improvement, the utility model also comprises ambient light illumination detector 4, and described ambient light illumination detector 4 outputs signal to controller 1.Ambient light illumination detector 4 can detect operational environment illumination, and detected signal is exported to controller 1.When operational environment illumination changes, controller 1 outputs signal to LED power governor 3 and regulates the operating current of led chip or the duty ratio that PWM regulates automatically, the luminous intensity of LED is changed, thereby the brightness value of automatic Control work environment, the brightness value that makes operational environment had both satisfied the requirement of illumination index, again saves energy effectively.

When concrete the use, the installation site of led chip Temperature Detector 2 should be reacted the actual temperature of led chip as far as possible, and the installation site of ambient light illumination detector 4 should be reacted the actual brightness value of operational environment as far as possible.This intelligent LED illumination driver also can provide connected network communication and controlled function, be mainly used in the drive controlling of making LED in nearly all high power LED semiconductor luminaire, as the occasion of great power LEDs such as LED lighting of home, public building illumination, the illumination of LED city street lamp, LED airport shot-light, traffic lights application.

In a word; though the utility model has exemplified above-mentioned preferred implementation; but should illustrate; though those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present utility model, otherwise all should be included in the protection range of the present utility model.

Claims

1. intelligent LED illumination driver, it is characterized in that, comprise controller (1), led chip Temperature Detector (2) and LED power governor (3), described led chip Temperature Detector (2) outputs signal to controller (1), and described controller (1) outputs signal to LED power governor (3).

2. according to the described intelligent LED illumination driver of claim 1, it is characterized in that: also comprise ambient light illumination detector (4), described ambient light illumination detector (4) outputs signal to controller (1).