Stage lighting adjusting system and method

Abstract

The invention discloses a stage lighting adjustment system and a method. The system comprises a DC power supply module, a DMX signal input module, a DSC digital signal controller and a plurality of output channels. The DMX signal input module is connected to the DSC digital signal controller. Each output channel is corresponding to LED lamps having a certain color, and comprises a controlled powerregulator, an anti-oscillation power compensation filter module, a PWM control signal controlled voltage divider, a signal superimposed voltage follower, a current cut-off negative feedback module, acurrent negative feedback module, a high power field-effect tube, a power resistor current detection module and a substrate temperature collection module. The invention not only can realize fine dimming, but also make the color rich and vivid, the service life is prolonged, the stability is increased, and the demand of the professional stage is met to the maximum extent.

Description

technical field [0001] The invention relates to a lighting adjustment system, in particular to a lighting adjustment system and method for a stage, and belongs to the technical field of stage lighting control. Background technique [0002] Requirements for professional stage dimming: the larger the dimming range of the lamp, the better; the faster the response to DMX512 signals, the better; the softer the light, the better; the richer the colors, the better; The better, the longer the life, the better, all of these must be guaranteed by the stability of the system. It is these requirements that make LED lighting difficult to use on stage. According to the traditional theory of three primary colors, only red, green and blue LED lamp beads are needed to produce all colors; but practice has proved that red, green and blue LED lamp beads cannot mix certain color segments at all, and at the same time Dimming doesn't feel soft enough either. Generally, LED lamps are composed of...

AI Technical Summary

Problems solved by technology

However, in practical applications, its color is not rich enough bright, softness is not enough, and the fundamental reason is that its regulation system does not consider the factors affecting PWM pulse width, power supply voltage and temperature, etc.

In addition, LED dimmers commonly used in stage lighting control currently use a simple LC filter composed of an output inductor and an output capacitor to reduce low-end flicker problems. This simple LC filter is It is very easy to disturb the harmonic oscillation, easily damage the filter, and the dimmer is also unstable

It is for the above reasons that after three months of use of some LED lamps, the light decay is serious and the failure rate increases, which makes people misunderstand that the service life of LED lamps is much less than 50,000 hours.

Images