Amongst the issues of LED lights dimmability is probably the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, this is the adjustment of current, has long been a choice. However, this process only works safely when used in combination with one LED bulb. Systems of LEDs require a more sophisticated method of dimming. Both basic kinds 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 an extremely 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 towards the LED increasing and decreasing its intensity.
The disadvantage of analogue dimming is that it only works safe as long as we dim one particular light bulb. Systems of LED lights demand a more refined technique. The problem of dimming a system of Leds is there are various types of LEDs, requiring various ways for dimming. If there is a process of lights we may like to dim, the various LEDs may react diversely for the same amount of current, and as the current is reduced some LEDs can shut off later or sooner than others. Also, analogue dimming largely changes the color of the light, similarly to after it is used in combination with incandescent lights.
By far the most frequently used manner of dimming LEDs is Pulse-Width Modulation, which is basically the cutting of the phase at a certain frequency. PWM switches the devices between fully on and fully off at a frequency that cannot be told by the human eye, therefore LED Dirver Ul always run on the forward current recommended. The frequency of switching determines the brightness of light, therefore the longer the lights are “on” the brighter the light is going to be. Here is the same technique used in incandescent light dimmers as well, except that incandescent lights react to current more slowly, and thus require a different frequency.
2 kinds of Pulse-With Modulation signals are used often with dimming light: the leading-edge and the trailing edge techniques. Those two are not the same ways of cutting the phase, and bring about separate dimming technologies. The most frequently used dimmers of LEDs use solely the leading-edge technology. Dimmers marked as R or RL are suitable for most dimmable LEDs, because they work with all the leading edge technology and never include electronic transformers. TRIAC drivers, or devices governed through the DMX and digital addressable lighting interface (DALI) protocols and, down the road, may include wireless (RF) as being a control option, that is certainly dimmers that turn or slide with a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled using a touch or push button, are often powered by an electric transformer, excluding many dimmable LEDs.
Another kind of phase-cutting method is trailing edge technique, usually utilized in MOSFET or possibly is not suitable for almost all dimmable LEDs. Among the latest inventions appearing on the industry is the RAIS lamp technology. RAIS lamps give you a higher level of functionality and manage to work with all types of dimmers available on the market. However RAIS technology remains new, as well as 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 in the market to be much safer and easier than previous dimmable LED lights’.
Within the ever-evolving technologies of LED lights, dimmable LEDs remain to become designed to further compatibility and much better performance. Since there is no general rule for what dimmer LED Dimmable Driver might be ideal for, always check the technical details with the distributor. Use of LED lights with non-compatible dimmers might ruin the LEDs, plus they are, right now, not the least expensive solution of lighting.