However, when LED displays began to be used for indoor applications using smaller pitch products, the space available for electronic components was squeezed, and as a result, dynamic scan drive (line-scanning drive) based on time-division multiplexing (TDM) came into being. In the early stage, LED displays were mostly used for outdoor applications using larger pitch products, which did not have a physical space limit for driver ICs as they were designed with static scan drive. With an independent voltage power supply, the red, green, and blue LED chips can be separately and accurately powered, providing different voltages to them under the same current, which can ensure that they work at their rated power, thereby improving energy utilization and reducing energy consumption.Ĭommon Cathode VS Common Anode LED display, which is better? LED professionals know that the rated power required for the red, green, and blue chips is different, and ordinary power supply methods cannot separate them and can only provide them with the same power. Additionally, this technology can separate and precisely power the red, green, and blue LED chips. The voltage drop and current loss can be reduced by using the independent voltages power supply method. It is an energy-saving power supply technology for LED displays where the current first passes through the LED chips and then reaches the negative pole of the driving IC, hence the name “common cathode”. A common cathode LED screen has all of the cathodes of the individual LEDs connected together and to a common terminal, while the anodes of each LED are connected separately.Ĭommon cathode”.
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