Under normal circumstances, the white balance state and when playing the video, the temperature of the Common Cathode LED display is about 20℃ lower than that of the ordinary outdoor LED display. The special Common Cathode power supply method makes the LED display produce less heat and the temperature will be lower during the working process. Why the Common Cathode LED display has lower heat? The Common Anode, it provided to R, G, B (red, green, blue) lamp beads with a voltage higher than 3.8V, such as 5V unified power supply, but the best working voltage required for the red, green and blue lamp beads is lower than 5V, according to the power formula P=UI, With constant current, the higher the voltage, the higher the power consumption, and the more heat the LED display generates during operation.ģ. So the LED display will generate much less heat at work. The red lamp bead voltage requirement is about 2.8V, the blue and green bead voltage is required to be about 3.8V, this way of power supply can reduce the power consumption. The red, green and blue lamp beads have different voltage requirements. The Common Anode means that the current flows from the PCB board to the lamps, and supplies power to R, G, B (red, green, and blue) uniformly, which causes the forward voltage drop of the circuit to become larger.Ĭommon Cathode, it will provide current and voltage to R, G, B (red, green, blue) respectively. The Common Cathode power supply mode is that the current passes through the lamp beads first, and then to the negative electrode of the IC, so that the forward voltage drop is reduced, and the internal resistance of the conduction is also reduced. What is the difference between Common Cathode/Common Anode LED display? In fact, it is a kind of LED display energy-saving technology , adopt the method of separately supplying power to the R, G, B (red, green, and blue) of the LED lamp, precisely distribute current and voltage for R, G, B lamps, because R, G, B (red, green, blue) lamps need the best operating voltage and current is different, In this way, the current passes through the lamp and then to the negative electrode of the IC, the positive voltage drop will be reduced, and the internal resistance of the conduction will be reduced.Ģ. ''Common Cathode'', refers to the Common Cathode power supply mode. This can save energy by up to 75%, so what is the Common Cathode LED display technology? What are the advantages of this technology?ġ. After the emergence of Common Cathode LED display technology, it has attracted great attention from the LED display market.
However, it also has the disadvantages of high temperature and excessive power consumption. After years of development, the conventional Common Anode LED display has formed a stable industrial chain.