Independent Power Supply & Energy-saving

Common cathode drive architecture are using precise electronic control. Basing on the different photoelectric characteristics of red, green and blue LEDs, with common cathode IC control system and independent private mode, different led drive circuits can be accurately allocated different voltage, so that the power consumption of the common cathode products is lower than common anode products. They are more power-saving and energy-saving.

Less Heat Production

We use 2.8V for red LEDs, 3.8V for green and blue LEDs instead of 5V for all the LEDs, so the power consumption of the common cathode products is low. And the LED display can generate lesser heat when it is working.

True and Stable Colour Output

The common cathode driving method can accurately control the voltage, reduce power consumption, and heat generation of the LED display. And the LED display can operate continuously without wavelength drift and display the original color stably.

Screen Life Enhancement

The lower energy consumption of the common cathode LED display greatly reduces the temperature rise of the system, thus effectively reducing the probability of damage to the LED display, improving the stability and reliability of the entire display system, and more effectively extending the life of the LED display.

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Common Anode LED Display

Common anode LED screen has all of the anodes of the individual LEDs connected together and to a common terminal, while the cathodes of each LED are connected separately.

Common Cathode LED Display

A common cathode LED screen is also called” energy-saving led display”. It 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.

common cathode”. 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”. The voltage drop and current loss can be reduced by using the independent voltages power supply method. Additionally, this technology can separate and precisely power the red, green, and blue LED chips. 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. 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.

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The difference between the common cathode and common anode

 

The direction of the current flow

■ In common anode mode, the current of LED displays flows from PCB to LED diodes, and the RGB LEDs are powered with the same power source at the same power rate, and therefore the forward voltage drop is increased.

■ In common cathode mode, the LED display’s current first passes through LED diodes with R, G, and B LEDs separately powered. Voltage and current are precisely distributed based on individual needs, then to the negative ends of ICs. The forward voltage drop is reduced, and as a result, there is less internal conduction resistance.

The supply voltage

■ In common anode mode, the LED display provides RGB LEDs with a unified voltage higher than 3.8V (such as 5V), therefore the power consumption is high.

■ In common cathode mode, the LED display provides RGB LEDs with separate voltage based on actual needs (2.8V for the red LED, and 3.8V for the green and blue LEDs). Because of this separate and precise power supply, the power efficiency is higher. Consequently, less heat is produced as less power is consumed.

 Energy efficiency and cooling effect

■ Based on accurate power control, common cathode technology can reduce the power consumption of the entire system by reducing the red LEDs’ supply voltage. Moreover, there are no extra line-scanning devices needed to achieve this. By using common cathode technology, LED displays can reduce excessive heat and power consumption, pixel failure rate, and ghost lines (tailing effect), thus improving LED displays’ overall performance