![]() The exact voltage drop will of course depend upon the semiconductor material used, color, tolerance, along with other factors.Īs the LED is basically a diode, its IV characteristics curves can be plotted for each color as shown below. LED Voltage and Currentįor most low-power LEDs, the typical voltage drop is from 1.2V to 3.6V for currents between 10mA to 30mA. It just enhances the light output and indicates its color when it is not illuminated. Therefore the color of the light emitted by an LED is NOT determined by the color of the body of the LED. The actual color of an LED is determined by the wavelength of light emitted, which in turn is determined by the actual semiconductor material used to make the diode. # The back of module is completely enclosed, high waterproof level IP67.Gallium arsenide(GaAs) Aluminium gallium arsenide (ALGaAs) make the voltage source very close to the forward voltage of the LED, relying on the LED's intrinsic resistance to limit the current to a safe level. It does need current limiting somehow, and a resistor is one way to do that. Power & signal all in 1 cable, more convenient for maintenance. An LED does not require a resistor on the anode side, or the cathode side. # Bevel 45 degree designed for led cube, right angle or curved shape installation. # 50% less heat than common screen, no need cooling fans. M-Shine common-cathode product: Rock Plus Series The low heat effectively reduces the LED damage rate, improves the stability and reliability of entire display system and prolongs the lifespan.Ĥ. The common cathode technology precisely controls the different voltage, which not only reduces the power consumption, but also reduces the heat of led display, and LED display has no wavelength shift under continuous operation to stabilize the bright colors! ![]() * Precise supplying power to ensure energy saving.īased on the different photoelectric characteristics of LED R, G, B and working with intelligent ICs, the power consumption is 30% lower than common products. What is the advantage of common-cathode LED display? What is the difference between common-cathode and common-anode LED display?ģ. "Common-cathode" means the common cathode supplying power method, it is also an energy-saving technology of LED display.Ĭonsidering the optimal operating voltage and current required by the R, G, B led lamps are different, so the R, G, B of LED lamps are separated for supplying power in the common-cathode design, means different current voltages are accurately allocated to the R, G, B led lamps respectively, the current can be supplied to the led lamps first and then to the negative electrode of ICs, and the forward voltage drop will be reduced, therefore, the on-resistance becomes smaller.Ģ. Any time something electronic lights up, there's a good chance that an LED is behind it. As a result, a new technology - common cathode circuit design is emerging in the LED display industry, it has attracted great attention in the market because it can achieve energy saving of 50%.ġ. Light-Emitting Diodes (LEDs) Contributors: Nick Poole, bboyho Favorite 68 Introduction LEDs are all around us: In our phones, our cars and even our homes. LEDs or Light Emitting Diodes dont come with any labeling on it to identify. ![]() After years of development, the traditional common-anode LED display has formed a stable industrial chain, however, there are also disadvantages of excessive screen temperature and high power consumption. Identifing a LEDs the cathode and anode of a led is very easy by looking inside.
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