Independent Power Supply Energy-savingĬommon cathode drive architecture using precise electronic control, based on led red, green, blue three different photoelectric characteristics, with common cathode IC control system and independent private mode, for the led drive circuit precision distribution of different voltage, so that the product power consumption relative to similar products more energy efficient, more power saving. Red, green, blue three kinds of lamp beads on the voltage request is not the same, red lamp beads voltage request in about 2.5V, blue and green lamp beads voltage request in about 3.8V, so that the power supply can reach the accurate power supply and power consumption is less, led display screen in the work of the heat generated by much lower.Ĭommon anode, is R, G, B (red, green, blue) to give a higher voltage than 3.8V (let’s say 5V) unified power supply, at this time, red, green, blue get the voltage is unified 5V, but red, green, blue the three lamp beads need the best working voltage is much lower than 5V, according to the power formula P = UI, in the case of constant current, the higher the voltage, the higher the power, that is, power consumption The greater, while the led display in the work of the product will also be more heat. The common anode connection is the current flowing from the PCB to the lamp beads, to R, G, B (red, green, blue) unified power supply, to incur the circuit forward voltage drop becomes large.Ĭommon cathode, as cited above, it will be separate to R, G, B (red, green, blue) to provide current voltage. G, B (red, green, blue) lamp beads required by the best working voltage and current is not the same, so that the current will first go through the lamp beads and then to the IC cathode, the forward voltage drop will be reduced, the on-state internal resistance will become smaller.Ĭommon cathode power supply method, as mentioned above, is by the current first through the lamp beads, and then to the IC cathode, so that the forward voltage drop becomes smaller, the conductive internal resistance also becomes smaller. “Common Cathode”, refers to the common cathode power supply, in fact, is a led display energy-saving technology, refers to the use of common cathode way to power the led display, that is, the use of led beads R, G, B (red, green, blue) to separate the power supply, accurate respectively for R, G, B beads to allocate current voltage, due to R, G, B (red, green, blue).

Only now, as the industry chain and technology products continue to mature and stabilize, and the cost decreases, it really makes the common cathode rgb led display into the public view.

In fact, “common cathode” is not a brand-new technology, some of the industry’s screen enterprises in the early years of “common cathode technology indoor small pitch products” has been widely used in national key projects, and now with the industry chain and technology products continue to mature, stable, as well as cost reduction. LED display using common cathode technology, its energy-saving effect can reach 30% to 75%, greatly reducing the power consumption, and can save a lot of electricity expenses every year. Conventional common led display has been through the years, has constituted a stable industry chain, driving the application of led display, with the development of the economy, the market requirements for led display size is getting larger and larger, using conventional led display to splice the large screen will have a lot of power consumption, every year to pay a lot of electricity costs.

Rgb common cathode led vs common anode