Amongst the issues of LED lights dimmability is among the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, which is the adjustment of current, has long been an option. However, this technique only works safely when used in combination with one LED bulb. Systems of LEDs demand a modern-day way of dimming. The two basic types of dimming are the PWM or Pulse-Width-Modulation and the analogue dimming, each of which are switched-mode regulators. These two 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 is the adjustment of cycle-by-cycle from the LED Power Supply current regulated using a potentiometer. The current is adjusted to the LED increasing and decreasing its intensity.
The disadvantage of analogue dimming is it only works safe as long as we dim just one light bulb. Systems of LED lights demand a more refined technique. The problem of dimming a process of LED lights is there are various types of LEDs, requiring various ways for dimming. When there is a process of lights we would like to dim, the many LEDs may react diversely towards the same amount of current, and as the current is reduced some LEDs can shut off later or earlier than others. Also, analogue dimming largely changes the color in the light, similarly to after it is combined with incandescent lights.
Probably the most frequently used manner of dimming LEDs is Pulse-Width Modulation, which is basically the cutting of the phase in a certain frequency. PWM switches the devices between fully on and fully off in a frequency that should not be told through 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 utilized in incandescent light dimmers as well, other than incandescent lights react to current more slowly, and therefore require a different frequency.
Two types of Pulse-With Modulation signals are used often with dimming light: the leading-edge and the trailing edge techniques. Those two will vary ways of cutting the phase, and bring about separate dimming technologies. The most commonly used dimmers of LEDs use solely the leading-edge technology. Dimmers marked as R or RL are compatible with most dimmable LEDs, given that they work using the leading edge technology and you should not include electronic transformers. TRIAC drivers, or devices governed from the DMX and digital addressable lighting interface (DALI) protocols and, later on, may include wireless (RF) as a control option, that is dimmers that turn or slide using a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled using a touch or push button, are frequently powered by an electric transformer, excluding many dimmable LEDs.
The other form of phase-cutting strategy is trailing edge technique, usually utilized in MOSFET or perhaps is not suitable for the majority of dimmable LEDs. One of the latest inventions appearing on the industry is the RAIS lamp technology. RAIS lamps offer a higher degree of functionality and manage to work with all kinds of dimmers available on the market. However RAIS technology continues to be new, as well as its long-term impact on LEDs have not been fully tested. When they end up being trustworthy their application both domestically and commercially, can dwxakg in the market to be much safer and easier than previous dimmable LED lights’.
In the ever-evolving technologies of Leds, dimmable LEDs remain to become developed to further compatibility and performance. While there is no general rule for the purpose dimmer LED Dimmable Driver might be appropriate for, always check the technical details with all the distributor. Implementation of Leds with non-compatible dimmers might ruin the LEDs, and they are generally, at the moment, not the least expensive solution of lighting.