[Senior Engineer Annual Meeting] SOURCE LEADER Chen Haojie: The "Upgrade" of LED Display Power Supply

"The future development direction of LED display power supplies must be towards high PF values, high efficiency, multiple input and output protection, and EMC standards." SOURCE LEADER Sales Director Chen Haojie believes that the size of display power supplies will become smaller, power density will increase, and reliability will continue to improve.

From December 14 to 15, the "2020 High Engineer LED Annual Meeting" themed "Display on Both Sides, Lighting in All Directions" was grandly held at the Hyatt Hotel near Shenzhen Airport, sponsored by Zhaoyuan Optoelectronics.

As an annual event in the LED industry, this year's annual meeting received strong support from over 40 units in the LED industry chain and flat panel display, with nearly 1,000 industry professionals registering to attend, creating a bustling scene.

At the display products and applications session sponsored by Lehman Optoelectronics, SOURCE LEADER Sales Director Chen Haojie delivered a keynote speech on "New Trends in LED Display Power Supply Development." According to Chen Haojie, although power supplies account for only 3%-5% of the cost of displays, as the "heart" of LED displays, their reliability requirements are very high to ensure stable operation.

SOURCE LEADER Sales Director Chen Haojie

In recent years, with the gradual maturity of LED display technology and the rapid decline in costs, LED displays, especially small-pitch displays, have maintained a high-speed growth trend. The market size of display power supplies has also grown vigorously.

Chen Haojie believes that although the LED display market size declined in 2020 due to the pandemic, as the market gradually recovers, the power supply market will also experience rapid growth along with the overall development of displays.

"Currently, the focus of display power supplies is on reliability + cost-effectiveness." Chen Haojie stated that reliability and cost-effectiveness are mainly assessed based on several technical parameters such as power factor, efficiency, input protection, output protection, size, and EMC.

Different applications have different requirements for power supplies.

According to Chen Haojie, the internal power supply of die-cast aluminum enclosures is efficient and has high power density, which places relatively high demands on components such as MOSFETs and electrolytic capacitors inside the power supply.

Transparent screen products require power supplies to be made into narrow strips; the narrower the power supply, the better the light transmittance of the screen, making the entire screen more aesthetically pleasing.

"Outdoor screen products have high maintenance costs and require higher reliability and longer lifespan for power supplies." Chen Haojie stated that with technological advancements, various countries and regions have established relevant industry standards, which are reflected in certification requirements: China requires CCC, Europe requires CE and TUV, and the United States requires UL. These certifications impose higher requirements on the technical specifications of power supplies.

At the end of the speech, Chen Haojie stated that the application of new technologies and new materials is driving the development of switch power supply technology for displays, such as synchronous rectification technology, magnetic integration technology, and the application of silicon carbide and gallium nitride materials.

The 2020 High Engineer LED Annual Meeting, sponsored by Zhaoyuan Optoelectronics, lasted for two days, with representatives from over 30 companies delivering wonderful keynote speeches on hot topics such as Mini/Micro LED, UV LED, small-pitch LED, smart lighting, and health lighting. For more information on the 2020 High Engineer LED Annual Meeting, please follow up on the subsequent reports from High Engineer New Display!