LED dimmer, mostly recognized as LED Lighting Dimmers or LED lamp dimmer, is
the call of LED constant present power driver that keeps outputting present
varying with voltage change. When power IC detects inputting voltage alter, it
accordingly adjusts internal PWM signal duty ratio so that outputting current
well vary with inputting voltage alter. Therefore, LED light brightness
exchanges for the aim of dimming. LED dimmer operating principle entails pulse
width modulation, continuous current power adjustment and group control. By
classification of application voltage, LED dimmer includes 0-10V Led Dimmer, 1-10V LED
dimmer and other types.
Below, let’s come to detailed understanding
about LED dimming technology.
Firstly, triac dimming. This dimming
technology created from incandescent light bulb can smoothly realize dimming by
taking use of triac chopping wave method by virtue of incandescent light bulb
pure impedance load. Nevertheless, this really is quite not sensible for LED.
For 1 thing, it’s of low efficiency to adjust power from compatible triac,
contradicting LED original intention of power saving. For another, it's
difficult to understand high energy. For third, it only works within the
situation of single inputting voltage. Triac Led Dimmer,
usually LED constant voltage triac dimmer will be the application of this technology.
But, it is inevitably to die out with incandescent light bulb disappears.
Secondly, linear dimming. This is
technology sometimes becoming applied in DALI dimmer, offered as constant
present DALI dimmer and constant voltage DALI dimmer. By taking use of unique
dimmer with continuous present chip to adjust LED current, it reaches the aim
of dimming. This technology has not poor effect only that complex wiring is
unfavorable to lightings like fluorescent lamp and street light. As for desk
lamp, this technologies is a lot popularly applied.
Thirdly, PWM dimming. This technique is
fairly similar with linear dimming and occupies most marketplace together with
it. LED PWM dimmer will be the common mature application of this technology.
Also, this really is a technologies for PWM dimming customers and customers to
apply with pleasure.
Fourthly, remote dimming. It is divided
into infrared remote dimming and wireless remote dimming two kinds. Though with
a lot complication to realize, remote dimming can get the effect of altering
color temperature and colour that other dimming methods can't acquire. It's
mainly used in panel light dimming, also partially for bulb light. On account
of different application atmosphere, it is seldom applied by Indoor Led Dimmer.
Fifthly,
section dimming. This dimming technique gets the aim of dimming by switching
switches on wall in regulated time. The benefit lies in becoming free from
additional dimming element. Besides, for the reason that section dimming is
totally realized by internal control from energy switch chip, inside a complete
voltage situation, it can realized higher efficiency and high energy operation
regardless of in what kind of brightness. The shortage is only being capable of
circulation dimming based on preset brightness instead of variable dimming. But
this type IC is couple of and current adjustment is quite undesirable. Anyway,
with the maturity of technology, section dimming may be well created by LED Dimmers Manufacturer to become the
mainstream of dimming technologies.
