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, which is the adjustment of current, has long been an option. However, this method only works safely when combined with one LED bulb. Systems of LEDs require a more sophisticated approach to 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. Both of these types are similar within the sense that they both control the time-averaged current through the diode.
Analogue dimming is a very simple method of dimming, it will be the adjustment of cycle-by-cycle in the LED Power Supply current regulated with 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 LED lights require a more refined technique. The issue of dimming a system of Leds is there are various types of LEDs, requiring various methods for dimming. When there is a system of lights we may like to dim, the different LEDs may react diversely to the same 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 color in the light, similarly to after it is used in combination with incandescent lights.
Probably the most commonly used manner of dimming LEDs is Pulse-Width Modulation, which can be fundamentally the cutting of the phase at a certain frequency. PWM switches the devices between fully on and fully off with a frequency that can not be told from the 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 will likely be. Here is the same technique found in incandescent light dimmers as well, with the exception that incandescent lights respond to current slower, and for that reason need a different frequency.
Two types of Pulse-With Modulation signals are employed often with dimming light: the leading-edge and also the trailing edge techniques. Both of these are not the same means of cutting the phase, and lead to separate dimming technologies. 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, down the road, may include wireless (RF) as a control option, that is certainly dimmers that turn or slide using a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled using a touch or push button, tend to be powered by an electric powered transformer, excluding many dimmable LEDs.
The other kind of phase-cutting strategy 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 marketplace is the RAIS lamp technology. RAIS lamps give you a higher level of functionality and manage to work with all kinds of dimmers available on the market. However RAIS technology continues to be new, along with its long-term effect 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 much safer and much easier than previous dimmable LED lights’.
Within the ever-evolving technologies of Leds, dimmable LEDs continue to be to become developed to further compatibility and performance. Since there is no general rule for what dimmer LED Waterproof Power Supply might be ideal 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, right now, not the most affordable solution of lighting.