The process and testing standards for energy efficiency certification of flat panel televisions use the principle of countless small inert gas bulbs on the screen to form images. Due to the limitations of this principle, plasma televisions cannot be made too small, usually larger than 40 inches. Compared to LCD televisions, they are relatively inexpensive and have poor clarity. The thickness of plasma televisions is usually around 10 centimeters

With the development of the flat panel TV and set-top box industries, new technologies and products are emerging one after another. Plasma TVs have basically withdrawn from the consumer market, and 4K/HDR/OLED TVs, curved/ultra-thin TVs, large-sized TVs, borderless TVs, etc. have emerged and been mass-produced. The market share of network set-top boxes is constantly increasing, and consumers' requirements for the display function of flat panel TVs are becoming higher and higher. The 2013 edition of energy efficiency standards can no longer fully meet the requirements of industry development

Flat panel TVs and set-top boxes have high usage frequency, long startup time, and an annual power consumption of over 100 billion kilowatt hours, making them the main energy consuming appliances. Flat panel televisions and set-top box electronic information products have obvious characteristics, and technologies such as large screens, high-definition, and intelligence have developed rapidly, especially energy-saving technologies. It is necessary to update energy efficiency standards and indicators in a timely manner to meet the continuous development needs of the flat panel television industry. Therefore, in order to deeply implement the Scientific Outlook on Development, comprehensively implement the basic national policy of resource conservation, further improve the energy efficiency level of flat panel TVs and set-top boxes, modify, adjust, and improve the product range covered by energy efficiency standards, the national standard "Limited Values and Levels of Energy Efficiency for Flat Panel TVs and Set-top Boxes" (GB24850-2020) has been revised

However, for LCD TVs, only three energy efficiency levels are generally used: level 1, level 2, and level 3. For the sake of saving electricity, it is recommended to purchase products with a level 1 energy efficiency level, which is also known as Zui energy-saving products. Why? We can calculate the power consumption. Taking a mainstream 65-inch 4K LCD TV as an example, products with level 1 energy efficiency typically consume 170W power and 0.17 kWh per hour. If calculated based on watching TV for 4 hours per day, the annual viewing time reaches 1460 hours, resulting in 0.17x1460=248.2 kWh, and an annual power consumption of 248.2 kWh

If it is a Level 3 energy efficiency TV, its product power consumption is generally 190W, consuming 0.19 kWh per hour. If calculated based on watching TV for 4 hours per day, the annual viewing time reaches 1460 hours, which can obtain 0.19x1460=277.4 kWh, and the annual power consumption is 277.4 kWh. So it means that using a TV with level 1 energy efficiency will save about 29.2 kilowatt hours of electricity compared to a TV with level 1 energy efficiency. Calculated at 0.62 yuan per kilowatt hour for municipal power supply, 0.62x29.2=18.104 yuan. Although a TV does not save much money, the huge number of TV users nationwide can imagine the savings in electricity bills