Filter-type LED billboard decoration lamp driving system

Abstract

The invention discloses a filter-type LED billboard decoration lamp driving system. The system is characterized by mainly comprising a driving chip U1, a brightness sensor RS, a capacitor C2, a capacitor C4, a resistor R3, a power supply circuit, a filter circuit and a driving circuit. According to the technical scheme of the invention, due to the arrangement of the driving chip U1, the peripheral power supply circuit and the driving circuit, the illumination intensity collected by the brightness sensor RS is accurately processed, so that an LED lamp set can be accurately controlled to be timely switched on when the light brightness is insufficient. Meanwhile, the LED lamp set is switched off when the light brightness is sufficient. Meanwhile, the illumination of the LED lamp set is ensured to be stable after the LED lamp set is switched on. Therefore, the filter-type LED billboard decoration lamp driving system is suitable for further popularization and application.

Description

technical field [0001] The invention relates to a drive system, in particular to a filter type LED billboard decorative lamp drive system. Background technique [0002] With the development of society and the advancement of science, LED billboards have gradually replaced a single advertisement in the form of posters. LED billboards can be illuminated by LED lights when the light is insufficient at night. At present, the LED billboard decorative light driving circuit is usually used to control the LED light group for lighting. Its working principle is to sense the light intensity through the photoresistor, and when the light intensity is insufficient, the LED billboard decorative light driving circuit is turned on, so that the LED light group is automatically activated. Light it up, so that the LED billboard can advertise normally at night when the light is insufficient. However, since the photoresistor cannot accurately sense subtle changes in light intensity, it cannot acc...

AI Technical Summary

Problems solved by technology

However, since the photoresistor cannot accurately sense the subtle changes in light intensity, it cannot accurately control the LED light group to be turned on in time when the light is insufficient, and to be turned off when the light intensity is sufficient.

At the same time, due to the design defect inside the drive circuit of the currently used LED billboard decorative lights, it is easy to cause the light intensity of the LED light group to be unstable after being lit, resulting in the flickering phenomenon of the LED billboard.

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