led fluorescent tube dimming method
Adjust the brightness of T8 LED lighting dimmer function is currently in the t5 LED lighting is very important , is currently the ED lamps and displays, etc. must focus on the link.
Here will be LED tube dimming the relevant circumstances are introduced.
Type 1 : Pulse width modulation (PWM). After adjustment of the drive current was square wave , the pulse width variable , through the pulse width modulation into a modulation of the time continuous light LED lamp , and also change the input power , so as to achieve energy saving, dimming target . Frequency as usual at about 200Hz ~ 10KHz; Because the human eye visual lag, will not be felt in the dimming light generated in the process shine phenomenon . Can improve the thermal performance of LED , the defect is the drive current overshoot the life of the LED chips must have some effect .
The first two kinds : by modulating the SAA T8 LED Tube drive current to complete the LED lamp dimming the brightness of the UL T8 LED Tube and LED drive current into a certain proportion of stakeholders , we can adjust the LED drive current control LED lamp shade .
Section three kinds : imitation dimming method or linear dimming method . When the drive current is linearly increased or decreased , reducing the drive current during overshoot life of the LED chips , and the dimming strong anti-interference circuit . The defect size is the drive current change process certain color temperature of the Integrated T8 LED Tube have a certain impact .