In recent years, we can often hear the synonym of common shade cold energy saving led screen in LED display industry, so what is the difference between it and conventional LED display in essence? LED display manufacturers Mini photoelectric answer for you! Please look at the picture!
01
What is the common Yin cold screen?
“Common cathode” refers to the common cathode power supply mode. The common cathode cold screen adopts the common cathode lamp bead, and R and GB are powered separately. “Negative” is the negative pole, opposite to the anode (positive pole), the current flows through the lamp bead and then to the IC negative pole.
02
What is a common positive display?
The current of common positive display screen flows from PCB to lamp bead, and RGB lamp bead supplies power uniformly.
03
What are the characteristics of the cold screen?
The common shade cold screen adopts R and GB separate power supply, that is, the voltage and current are accurately distributed to the red, green and blue lamp beads, the current goes through the lamp beads and then to the IC negative electrode, the positive voltage is reduced, and the conduction internal resistance is small. Separate power supply scheme effectively reduces the power loss, greatly reduces the heat generated in the working process of the display screen.
04
What are the features of the common positive display?
Conventional LED displays are generally powered by common anode. The voltage requirements of red, green and blue lamp beads are different (the red lamp bead voltage is about 2.5V, and the blue-green lamp bead voltage is about 3.8V). The common positive display screen usually gives a voltage higher than 3.8V, and the current flows from the PCB input to the lamp beads, which not only increases the forward voltage drop of the circuit, but also produces excessive power loss.
05
Why is the cold screen “cold”?
The special common cathode power supply mode of the cold screen makes the LED display screen produce less heat and lower temperature rise. Under normal conditions, the temperature of the cold screen is about 20 ℃ lower than that of the conventional outdoor LED display screen of the same model in white balance state and video playing!
06
Where to save money?
Separate accurate power supply makes LED display reduce part of power consumption and operation cost; at the same time, working characteristics such as low heat and low temperature rise can save heat dissipation equipment such as air conditioner and reduce investment cost.
07
Advantages of common shade cold screen
The common shade cold screen has low temperature rise, even screen heat, constant color temperature, long-term use of colorless block, good display effect. In the case of ensuring high brightness and high contrast, the maximum energy consumption is saved.
Outdoor common shade cold screen has the advantages of low temperature rise, low heat, low power consumption, long service life and good display effect, which is expected to become a new favorite of outdoor display applications.