Menu-based look-up table selection type zero light attenuation compensation integrated LED driver power supply

Abstract

The invention relates to a menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source. The LED driving power source which is connected with a computer and an LED respectively comprises a communication interface, a storage unit, a control unit, a system clock, a reset port and a driving circuit; the communication interface, the storage unit, the control unit and the driving circuit are sequentially connected; the system clock is connected with the storage unit, the control unit and the reset port respectively; the system clock accumulates the system time and judges whether an adjusting section at which the system time is arranged is changed or not; when the adjusting section is changed, the control unit looks up a table in the storage unit to find out a corresponding current compensation rate and finds out a corresponding output current parameter from a preset current compensation rate and output current relational table and finally the driving circuit adjusts output currents to stabilize the LED luminance. Compared with the prior art, the LED driving power source has the advantages of being integrated, stable, high in efficiency, transplantable and the like.

Description

technical field [0001] The invention relates to an LED driving power supply, in particular to a menu-based look-up table selection type zero light attenuation compensation integrated LED driving power supply. 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 time, it...

AI Technical Summary

Problems solved by technology

At present, LED functional lighting fixtures all use high-power lamp beads. Although relatively speaking, LEDs have a long life, due to the limitations of current semiconductor light-emitting diode chip technology, the photoelectric conversion efficiency of LEDs needs to be improved, especially for high-power LEDs. , more than 70% of the electric energy is released as heat energy, and the effectiveness and scientificity of heat dissipation technology are not very ideal. In addition to the harsh use environment such as the appearance of lamps and lanterns, the situation of LED light decay is inevitable, so the current The lifespan of LED lamps is low, which greatly affects the speed of LED promotion and application

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