Amongst the issues of LED lights dimmability is one of the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, that is the adjustment of current, has long been an option. However, this method only works safely when used in combination with one LED bulb. Systems of LEDs require a modern-day approach to dimming. Both basic types of dimming are the PWM or Pulse-Width-Modulation and the analogue dimming, both of which are switched-mode regulators. Both of these types are similar within the sense that they both control time-averaged current through the diode.
Analogue dimming is definitely a simple method of dimming, it will be the adjustment of cycle-by-cycle in the LED Driver current regulated having a potentiometer. The current is adjusted to the LED increasing and decreasing its intensity.
The disadvantage of analogue dimming is that it only works safe as long while we dim a single light bulb. Systems of LED lights need a more refined technique. The difficulty of dimming a process of Leds is there are various kinds of LEDs, requiring various methods for dimming. If you have a process of lights we would like to dim, the various LEDs may react diversely for the equivalent amount of current, and as the current is reduced some LEDs can switch off later or earlier than others. Also, analogue dimming largely changes the colour of the light, similarly to when it is used in combination with incandescent lights.
Probably the most frequently used manner of dimming LEDs is Pulse-Width Modulation, which can be basically the cutting of the phase with a certain frequency. PWM switches the devices between fully on and fully off in a frequency that can not be told by the eye, therefore LEDA Driver 12v always run on the forward current recommended. The frequency of switching determines the brightness of light, so the longer the lighting is “on” the brighter the light will be. This is actually the same technique found in incandescent light dimmers as well, except that incandescent lights react to current slower, and therefore need a different frequency.
Two kinds of Pulse-With Modulation signals are used often with dimming light: the leading-edge as well as the trailing edge techniques. These two are not the same methods for cutting the phase, and lead to separate dimming technologies. Probably the most commonly used dimmers of LEDs use solely the leading-edge technology. Dimmers marked as R or RL are suitable for most dimmable LEDs, since they work using the leading edge technology and do not include electronic transformers. TRIAC drivers, or devices governed by the DMX and digital addressable lighting interface (DALI) protocols and, later on, may include wireless (RF) as being a control option, that is certainly dimmers that turn or slide having a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled using a touch or push button, tend to be powered by an electrical transformer, excluding many dimmable LEDs.
One other type of phase-cutting method is trailing edge technique, usually utilized in MOSFET or possibly is not suitable for almost all dimmable LEDs. One of many latest inventions appearing on the industry is the RAIS lamp technology. RAIS lamps give you a higher degree of functionality and seem to work with all sorts of dimmers available on the market. However RAIS technology continues to be new, along with its long-term impact on LEDs have not been fully tested. If they turn out to be trustworthy their application both domestically and commercially, can dwxakg out to be considerably safer and easier than previous dimmable LED lights’.
In the ever-evolving technologies of Leds, dimmable LEDs are still to become created to further compatibility and better performance. Since there is no general rule for the purpose dimmer LED Constant Voltage Drivers might be suitable for, always check the technical details with all the distributor. Use of LED lights with non-compatible dimmers might ruin the LEDs, plus they are, at the moment, not the least expensive solution of lighting.