In recent years, "carbon peaking, carbon neutrality", "carbon emission trading", "pollution reduction and carbon reduction" have become high-frequency words of hot discussion, and have also become the key topics of local government agencies. In the first quarter of 2022, a total of 79 "double carbon" related policies were issued nationwide, including 18 national policies and 61 local policies. In order to meet the needs of the times, the display will also be included in the scope of energy efficiency standards.
Some rejoice and some are sad. Enterprises based on the whole machine brand are very much in favor, they believe that low-carbon energy saving is the future development trend, if the state mandatory requirements to meet the energy efficiency standards of the display products can be sold, for the entire LED display industry is also a kind of market purification, the advantages outweigh the disadvantages. But LED display module companies hold the opposite attitude, the reason is very simple, LED display belongs to the customized products, the size of each display area is not uniform, the use of functions and environments are also very different, how to pass the energy efficiency standards, is it necessary to start from a block module test?
However, with the development of Mini/Micro LED technology, LED direct display products gradually enter the field of consumer electronics such as televisions, displays, LED movie screens, LED conference machines, mobile phones, tablets, etc., and it will be inevitable that LED displays will be included in the scope of energy efficiency standards. In the future, only display products that meet energy efficiency standards will be able to circulate in the market.
So, what are energy efficiency standards?
Energy efficiency standards, that is, energy use efficiency standards, are standards that specify the energy utilization efficiency level of energy-using products or the level of energy consumption within a certain period of time. Energy efficiency standards have high social and economic benefits. The mainland has promulgated and implemented 22 energy efficiency standards for energy-using products, covering household appliances, lighting appliances and transportation.
Content of the display energy efficiency standard
Mainland energy efficiency standards mainly stipulate energy efficiency limit values, and at the same time, according to different product characteristics, sometimes include energy conservation evaluation values, energy efficiency grading, advanced energy efficiency indicators, etc. Energy efficiency limit value, refers to the maximum power consumption or minimum energy efficiency value of the energy-using products allowed under the specified test conditions, is the market access requirements of the product in the field of energy efficiency, otherwise it is not allowed to produce and sell, it is a mandatory requirement; the energy-saving evaluation value is whether the energy-using products meet the evaluation indicators of energy-saving product certification requirements, and the products that meet or exceed the energy-saving evaluation value can apply for the national energy-saving product certification, paste a unified energy-saving mark, so as to inform consumers that the product is both energy-saving, quality and reliable, and it belongs to the recommended indicators Energy efficiency grading, according to the level of power consumption and energy efficiency level of the product is divided into 1, 2, 3, 4, 5 levels, 1 level indicates the highest level of energy efficiency, the most energy-saving, is the best product, 5 level means that the energy efficiency limit value index has been reached, is a qualified product. Generally speaking, the level 1 standard formulated by the mainland is the goal of general enterprises, level 2 represents energy-saving products, level 3 and 4 represent the average level of the country, and level 5 products are products that will be eliminated in the future.
The energy efficiency standards in the mainland are mandatory, that is, energy-using products that do not meet the energy efficiency limit requirements in the energy efficiency standards are unqualified products and are not allowed to be produced and sold. At present, led displays are not within the scope of energy efficiency standards.
In real life, how do we identify products that meet energy efficiency standards? It's actually very simple, look at the energy efficiency label. Energy efficiency label is a label affixed to the energy-using product, highlighting the size of the product's energy consumption and energy efficiency level, and is a standard for judging the energy consumption level of home appliances. Consumers can get intuitive energy consumption information and estimate daily consumption costs when purchasing products with such labels to determine which models of the same type of product are more energy efficient and less expensive to use.
Energy-saving and emission-reducing LED displays have always been on the road
At present, the mainland LED output value accounts for the world's first, according to CCID think tank is expected, the total output value in 2022 will reach 214.84 billion yuan. LED display can be seen everywhere, how to save energy, reduce emissions has always been a very important issue for screen companies. At present, most screen factories regard its energy saving coefficient as an important selling point, and generally use co-negative technology. Co-yin technology is a power supply technology developed relative to the traditional co-yang power supply method. The co-negative power supply technology can separate the red, green and blue lamp beads of the LED display, and supply them separately and accurately, so that each lamp bead can work under the best current and voltage, thereby improving the utilization rate of electric energy and reducing the loss of electrical energy. In addition, the current of the co-negative power supply method is first through the LED lamp bead, and then to the negative electrode of the driving IC, thereby reducing the forward voltage drop and further reducing the loss of power during the flow of electricity. In theory, the co-negative technology can make the energy saving effect of the LED display reach 75%, but due to other factors, the actual power consumption reduction should be in the range of 30%-75%.
The maximum power consumption of outdoor LED display (full color) is about 800W/square, that is to say, when this outdoor LED display reaches the maximum power (peak) every moment, the power consumption per square hour will be 0.8 kWh. The maximum power of each plate is 25w, and the power consumption of 16 plates is 150-200W.
Compared with LCD, LED display is known for energy saving, but its large area is a high energy consumption product. In order to reduce energy consumption, the industry has also explored a lot of experience. For example, the LED display made of environmentally friendly materials is less consumable than the product consumables produced by the general process and is more environmentally friendly. The use of automatic brightness adjustment system, that is, according to the day and night, in different locations and time periods, at any time to collect the ambient brightness, and the use of display control system by receiving system data and through the software automatic conversion into suitable for the brightness of the environment for broadcast screen. Large-area displays at high outdoor heights will use grille screens and network screens. The use of advanced LED display special chip system, to ensure that the power supply and other impact on the LED electronic display is reduced to a very low. Some driver ICs can also save the original 5V voltage to 4.2V to achieve energy saving. Starting from the power supply, the high-efficiency switching power supply is directly used on the existing LED display to reduce the power supply voltage and achieve better energy-saving effects.
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How to make the customized LED display can quickly pass the energy efficiency standard, this will be the current problem in the industry, I believe that the future will be able to find an effective way. In the long run, the integration of the whole machine is the future trend of LED display, and only standardized products can more easily pass the national energy efficiency standards.
In fact, as the previous machine companies said, if the country mandatorily introduces display energy efficiency standards, it is also a good thing for LED displays. The market will eliminate those inferior products that do not meet the standard, each enterprise pays more attention to product quality, the reputation of LED display will be better and better, the social acceptance will be higher, the added value of products will increase accordingly, the market cake will become larger and larger, after the survival of the fittest, the entire industry has formed a benign development.
Editor's layout: Wang Xiaolei