Among 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, that is the adjustment of current, has long been an option. However, this technique only works safely when used with one LED bulb. Systems of LEDs require a modern-day method of dimming. Both basic kinds of dimming are the PWM or Pulse-Width-Modulation and the analogue dimming, both of which are switched-mode regulators. These two types are similar in the sense that they both control the time-averaged current through the diode.
Analogue dimming is an extremely simple way of dimming, this is the adjustment of cycle-by-cycle of the LED Power Supply current regulated using a potentiometer. The current is adjusted towards the LED increasing and decreasing its intensity.
The drawback to analogue dimming is it only works safe as long since we dim a single light bulb. Systems of Leds require a more refined technique. The problem of dimming a system of Leds is there are many types of LEDs, requiring various ways for dimming. If you have a method of lights we would like to dim, the different LEDs may react diversely towards the same amount of current, and because the current is reduced some LEDs can turn off later or sooner than others. Also, analogue dimming largely changes the color from 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 is basically the cutting in the phase in a certain frequency. PWM switches the devices between fully on and fully off with a frequency that can not be told through the eye, therefore LEDA Driver 12v always run on the forward current recommended. The regularity of switching determines the brightness of light, so the longer the lighting is “on” the brighter the light will likely be. This is actually the same technique used in incandescent light dimmers as well, except that incandescent lights react to current slower, and for that reason need a different frequency.
Two types of Pulse-With Modulation signals are utilized often with dimming light: the leading-edge and the trailing edge techniques. Both of these are not the same means of cutting the phase, and bring about separate dimming technologies. By far 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, because 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) being a control option, that is dimmers that turn or slide with a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled with a touch or push button, tend to be powered by an electric transformer, excluding many dimmable LEDs.
Another kind of phase-cutting method is trailing edge technique, usually used 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 provide a higher amount of functionality and seem to work with all types of dimmers available on the market. However RAIS technology remains new, along with its long-term impact on LEDs have not been fully tested. Should they end up being trustworthy their application both domestically and commercially, can dwxakg out to be considerably safer and much easier than previous dimmable LED lights’.
In the ever-evolving technologies of LED lights, dimmable LEDs continue to be to become created to further compatibility and better performance. As there is no general rule for the purpose dimmer LED Dimmable Driver might be ideal for, always check the technical details with the distributor. Implementation of Leds with non-compatible dimmers might ruin the LEDs, and they are generally, currently, not the cheapest solution of lighting.