Among the issues of 12v led strip lights 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, is definitely an option. However, this method only works safely when used with one LED bulb. Systems of LEDs demand a more sophisticated method of dimming. The two basic forms 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 in the sense that they both control the time-averaged current through the diode.
Analogue dimming is an extremely simple means of dimming, this is the adjustment of cycle-by-cycle from the LED current regulated having a potentiometer. The existing is adjusted to the LED increasing and decreasing its intensity.
The downside of analogue dimming is it only works safe so long as we dim just one bulb. Systems of Leds need a more refined technique. The difficulty of dimming a system of Leds is that there are many types of LEDs, requiring different methods for dimming. If there is a system 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 make off later or earlier than others. Also, analogue dimming largely changes the color from the light, similarly to when it is combined with incandescent lights.
Probably the most commonly used manner of dimming LEDs is Pulse-Width Modulation, which can be basically the cutting from the phase in a certain frequency. PWM switches the devices between fully on and fully off in a frequency that cannot be told by the human eye, therefore LED bulbs always run on the forward current recommended. The frequency of switching determines the brightness of light, so the longer the lights are “on” the brighter the lighting will be. Here is the same technique found in incandescent light dimmers too, other than incandescent lights respond to current more slowly, and therefore need a different frequency.
2 kinds of Pulse-With Modulation signals are used often with dimming light: the top-edge as well as the trailing edge techniques. Both of these are not the same means of cutting the phase, and result in separate dimming technologies. By far the most commonly used dimmers of LEDs use solely the key-edge technology. Dimmers marked as R or RL are compatible with most power supply light, given that they work together with 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, later on, might 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 having a touch or push button, are often powered by an electrical transformer, excluding many dimmable LEDs.
The other type of phase-cutting strategy is trailing edge technique, usually utilized in MOSFET or perhaps is not suitable for the majority of dimmable LEDs. Among the latest inventions appearing on the industry is the RAIS lamp technology. RAIS lamps provide a higher amount of functionality and seem to work alongside all kinds of dimmers available on the market. However RAIS technology is qtjzkb new, and 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 grow to be much safer and simpler than previous dimmable LED lights’.
Inside the ever-evolving technologies of LED lights, LED ac110VDC12V driver continue to be to be developed to further compatibility and better performance. Since there is no general rule for which dimmer your LED might be ideal for, check the technical details with all the distributor. Implementation of LED lights with non-compatible dimmers might ruin the LEDs, and they are, right now, not the most affordable solution of lighting.