Among 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, that 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 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. Those two types are similar within the sense that they both control enough time-averaged current through the diode.
Analogue dimming is definitely a simple means of dimming, it is the adjustment of cycle-by-cycle of the LED Power Supply current regulated with a potentiometer. The current is adjusted for the LED increasing and decreasing its intensity.
The disadvantage of analogue dimming is that it only works safe as long since we dim one particular light bulb. Systems of Leds demand a more refined technique. The issue of dimming a process of Leds is that there are many types of LEDs, requiring various ways for dimming. If you have a process of lights we may like to dim, the various LEDs may react diversely to the equivalent amount of current, and as the current is reduced some LEDs can turn off later or sooner than others. Also, analogue dimming largely changes the color in the light, similarly to when it is combined with incandescent lights.
Probably the most frequently used technique of dimming LEDs is Pulse-Width Modulation, which can be basically the cutting of the phase at a certain frequency. PWM switches the devices between fully on and fully off at 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, and so the longer the lighting is “on” the brighter the light is going to be. This is the same technique found in incandescent light dimmers as well, except that incandescent lights react to current slower, and therefore need a different frequency.
2 kinds of Pulse-With Modulation signals are employed often with dimming light: the leading-edge and also the trailing edge techniques. Those two are different means 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 compatible with most dimmable LEDs, given that they work using the leading edge technology and never include electronic transformers. TRIAC drivers, or devices governed from the DMX and digital addressable lighting interface (DALI) protocols and, down the road, may include wireless (RF) being a control option, that is certainly dimmers that turn or slide using a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled having a touch or push button, tend to be powered by an electric powered transformer, excluding many dimmable LEDs.
The other kind of phase-cutting technique is trailing edge technique, usually used in MOSFET or is not suitable for the majority of dimmable LEDs. Among the latest inventions appearing on the market is the RAIS lamp technology. RAIS lamps provide a higher degree of functionality and manage to work with all types of dimmers available on the market. However RAIS technology is still new, as well as 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 in the market to be considerably safer and easier than previous dimmable LED lights’.
In the ever-evolving technologies of LED lights, dimmable LEDs remain to become developed to further compatibility and better performance. As there is no general rule for the purpose dimmer LED Constant Voltage Drivers might be ideal for, always check the technical details with the distributor. Use of Leds with non-compatible dimmers might ruin the LEDs, and they are generally, currently, not the most affordable solution of lighting.