Zero luminous decay realizing method and control system for LED (light-emitting diode) road lighting lamp

Abstract

The invention relates to a zero luminous decay realizing method and a control system for an LED (light-emitting diode) road lighting lamp. In the method, a certain power allowance (commonly 30 to 50 percent) is preserved by an adjustable constant current driving power supply according to a luminous decay time curve and a curve of luminous flux to current of the LED road lighting lamp; a current which is at least 1.5 times of a normal current of the LED road lighting lamp is output; the adjustable constant current driving power supply is provided with a dimming control interface and is controlled by a singlechip; the singlechip controls the size of a zero luminous decay performance output current of the LED road lighting lamp by calculating the operating time of the lighting lamp and compensating and controlling the output current in a certain time unit, so that the lighting lamp has zero luminous decay in the standard service life. According to the method and the control system, by regulating the output current of the power supply and compensating the normal luminous decay part of a lamp bulb, the luminous decay problem of the LED lamp is effectively solved and zero luminous decay of the high-power LED lamp is realized.

Description

technical field [0001] The invention relates to a method for zero light attenuation of LED lighting lamps, in particular to a method and control system for realizing zero light attenuation of LED road lighting lamps. Background technique [0002] As a new generation of light source, LED has many excellent properties. Because its principle is the energy of electron transition and hole recombination of PN junction, it emits light, so it is a solid-state light source. Coupled with efficient and stable phosphor technology, LED light source has high luminous efficiency. , low power consumption, long life, pure light color, high stability, strong safety, environmental protection, anti-vibration and many other incomparable advantages of traditional light sources. It is a green and environmentally friendly lighting technology. Against the background of the platoon, the advent of LED lighting is close at hand. [0003] LED light decay means that after the LED is lit for a period of ...

AI Technical Summary

Problems solved by technology

[0004] At present, LED functional lighting fixtures all use high-power lamp beads. Although relatively speaking, LED life is very long: it can reach 200,000 hours when the junction temperature is guaranteed to be 25 degrees. However, due to the current limitation of semiconductor light-emitting diode chip technology, LED The photoelectric conversion efficiency of high-power LEDs needs to be improved, especially for high-power LEDs, about 70% of the electric energy is released as heat energy, and the effectiveness and scientificity of heat dissipation technology are not very ideal. The condition of LED light decay is inevitable, so the current LED light life is relatively low, and the poor products are less than 10,000 hours, which greatly affects the speed of LED promotion and application.

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