What are the advantages of small pitch 4K 8K LED display?

In recent years, the development prospect of small pitch 4K 8K LED display is very good. The emergence of a new generation of cob, top, cob, mini led, micor led, especially the common cathode, seems to have pointed out a direction for the future development of LED technology. Compared with the years before the mass production of flip chip, the common cathode technology is more grounded, and it is also a landing technology that can bring technology improvement to the market in recent years. What are the advantages of common cathode small spacing LED display?

Positive is Yang, negative is Yin. Common anode is to connect the positive pole of diode together and drive it by negative pole, so common cathode is to connect the negative pole of diode together and drive by positive pole. As we all know, an LED bead is composed of red, green and blue light-emitting diodes. These diodes light up the diodes with extremely high opening and closing frequencies through their respective driving circuits. In this way, the red, green and blue lights are mixed with each other to show the various colors in my nature. The common cathode technology is a kind of power supply driving mode. In short, the three color diodes share one cathode (negative pole) in the circuit design, and the anode (positive) is set with the control circuit to control the small spacing LED display screen, so it is called “common cathode”.

On the contrary, it is the “Gy” เทคโนโลยี, which is still the mainstream technology. Why does the small spacing LED display with common cathode technology bring many advantages?

Originally, the positive poles of diodes were connected together to supply power uniformly, so it is necessary to meet the requirements of diode with the highest voltage in parallel circuit. For the diode with low voltage requirement, only voltage divider resistor can be added, which will cause power consumption and heat. After adopting the common cathode, different voltage can be supplied directly according to the different requirements of diode voltage, so there is no need to configure voltage divider resistor.

The advantages of the technique are as follows

The operating voltage of LED lamp bead can be reduced from 4.2-5v to 2.8-3.3v, while the brightness and display effect are not affected. The reduction of 1V voltage brings a series of advantages:

The direct expression is that the power consumption of small spacing LED display screen is reduced by more than 25%. The common anode technology is difficult to achieve such energy saving due to the necessity of adding voltage divider resistor;

ประการที่สอง, because of the reduction of power consumption, the temperature of the whole screen will be lower. Because the stability and life of LED are inversely proportional to the temperature, the small spacing LED display has higher reliability and longer life; ในเวลาเดียวกัน, the integration degree is further improved, the number of PCB components is reduced, and the stability is further improved.