When will the LED display really enter the common negative energy saving track?

- Jul 08, 2020-

With the rapid economic development, green, energy saving, and environmental protection have become global consensus and focus hot spots. The "13th Five-Year Plan for Energy-saving and Environmental Protection Industry Development" proposes that by 2020, energy-saving and environmental protection will become a major pillar industry of the national economy. The state has also increased the fiscal expenditure of China's environmental protection and energy conservation industry. Since its inception, LED video displays have been widely used with high brightness, rich colors, and flexible size applications. However, in addition to being a beautiful display carrier, LED video displays have also become a large power consumption. The "heat resistance", especially the outdoor advertising screen, consumes amazing power. In response to national energy conservation and environmental protection policies and to meet customers' high demands for product reliability, service life and display consistency, energy conservation and environmental protection, many LED display screen manufacturers have launched LED display products and related LED display accessories with common negative power supply technology It is said that the excellent performance of 75% energy saving has attracted great attention from the entire industry chain. In fact it is so magical?

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What is a common cathode LED display?

Compared with the traditional display, the biggest difference between the common cathode technology is its power supply direction and power supply voltage. From a technical perspective, the common cathode LED display screen uses R, G, and B to supply power separately, accurately distributing the voltage and current to the red, For green and blue lamp beads, the current passes through the lamp beads and then to the negative electrode of the IC. The forward voltage is reduced, and the conduction internal resistance is small. This effectively reduces the power consumption and greatly reduces the heat generated during the operation of the display screen.


What are the advantages of common cathode LED video display?

In addition to the technical parameters that make the common cathode LED display screen different from the conventional display, the common cathode LED display brings the operator the most direct and most significant advantage is that it reduces the power consumption of the LED display and reduces operating costs; at the same time, low heat The working characteristics such as low temperature rise can save heat dissipation equipment such as air conditioners and reduce input costs. In the case of ensuring high brightness and high contrast, it saves energy consumption to the maximum, and has the advantages of low temperature rise, low heat, low power consumption, long life and good display effect.


Why are common-yin energy-saving screens "not tepid" in the industry?

The maturity of the industrial chain of any new technology or new product requires a certain process, especially the industrial chain of LED display screen products, including driver IC, lamp beads, PCB, power supply, packaging, supporting facilities and other links, common LED The same is true for display products, which is why the "common negative" products have long existed, but they have not been effectively promoted. The low market recognition has led to a small market and expensive prices; some key original devices are suspected of infringement, resulting in inability to Large-scale production; R&D of peripheral supporting products lags behind.


But in fact, the promotion and popularization of common cathode LED video displays is of great significance to the sustainable development of the LED display screen industry and society. According to statistics, the global production of LED displays is more than 3.5 million square meters per year, based on the power consumption of 500 watts per square meter. To consume 1.75 billion kWh of electricity. This is not counting the electricity consumed in the production process; if all common energy-saving screens are used, at least 525 million kilowatt-hours of electricity will be saved for society every year. Calculated at 3333 degrees per ton of coal, it is equivalent to saving at least 157,500 tons of coal every year. It is equivalent to closing a small coal mine for the country every year.


Although the concept of "common cathode energy saving" is not the latest technology, it can be said to be the most violent new outlet for the most promising LED video display. LED display "energy saving" slogan has been shouting for many years, and now it is no longer just a "sound" of one or two companies, but it has really become an industry product development trend and has become a competitive point chased by this industry.


As LED display screens gradually enter a mature stage, the requirements for products are getting higher and higher, especially in terms of reliability, service life and display consistency. The common cathode power supply technology has advantages in these aspects. It can reduce the supply voltage of red LEDs to reduce system power consumption and lower the temperature of the screen body, so that electronic components have higher reliability and longer life at relatively low temperatures. In ultra-small pitch and Mini/Micro LED More advantages in application.

From the point of lowering the temperature, in the high-end market, common cathode technology is undoubtedly the trend. In the case of fixed products, because they are in use for a long time, energy saving can allow users to save costs, which has a higher cost performance in the long run.


According to the current energy conservation and environmental protection policies advocated by the country and the future development needs of LED display screens, energy-saving products are the general trend, and corporate layout of common energy conservation is also one of the ways to take a differentiated path, but companies on the market that can truly realize this technology are still Limited, on the other hand, if companies want to cultivate a world in this segment, they still need to take a long road, and they also need more investment in marketing and technology research and development.