Intelligent community illumination drive system having adaptive dimming function

Abstract

The present invention discloses an intelligent community illumination drive system having the adaptive dimming function. The system comprises a microcontroller. The input end of the microcontroller is connected with an AC / DC module, a temperature sensor and an ambient light sensor. The output end of the microcontroller is connected with a driving module. The input end of the AC / DC module is connected with the commercial power. The output end of the AC / DC module is connected with the driving module. The output end of the driving module is connected with an LED lamp. The LED lamp is connected with the temperature sensor. According to the invention, a DSP controller is adopted as a center control module, and a PWM wave generated by the DSP controller facilitates to regulate the magnitude of the output current of the driving module. Furthermore, the brightness of an LED is regulated and controlled, so that the core guarantee is provided for the adaptive dimming function. Through arranging the dual closed-loop circuit of the temperature feedback and the environment brightness feedback, the stability of the lighting environment and the safe and stable operation of the LED itself are ensured. The environment adaptive capacity, the automation level and the intelligent control level of the system are improved. The system is ingenious in conception, and has a better popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of intelligent lighting, and in particular relates to an intelligent community lighting driving system with an adaptive dimming function. Background technique [0002] LED is a solid-state semiconductor light-emitting diode, and its core is a PN junction. When a forward voltage is applied to both ends of the PN junction, the electrons and holes in the junction recombine under the action of an external electric field, and then the newly injected carriers recombine. Due to the recombination of the two carriers, part of the electrical energy is converted into light energy in the form of photons (effective recombination), and the other part is converted into heat energy (ineffective recombination). [0003] LED has the advantages of small size, energy saving, environmental protection, long life, safety, quick response, colorful colors, adjustable light intensity, etc. It has attracted much attention and has bee...

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Problems solved by technology

[0004] In recent years, LEDs have been widely used rapidly, but some problems have gradually attracted attention. On the one hand, due to the fact that LEDs will generate certain heat during operation, especially high-power LEDs, the heat will cause the temperature of the LED itself to decrease. When the temperature rises to a certain level, the life of the LED will be reduced or even burned out; on the other hand, since the LED is generally driven by a constant current source, as long as the driving current is stable, the brightness of the LED will remain unchanged, but the ambient brightness will be affected. If the ambient brightness is low, the LED brightness may not be able to meet the lighting requirements. If the ambient brightness is high, the LED brightness will exceed the lighting requirements and cause energy waste.

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