The impact of the novel coronavirus pneumonia epidemic on the LED industrial chain
2020-04-14
The novel coronavirus epidemic spread rapidly before the Lunar New Year. To control the epidemic, the government first announced "lockdown" measures for Wuhan and several other cities in Hubei Province, and later successively included many provinces and cities such as Beijing, Shanghai, and Shenzhen in closed-off management, extending the Lunar New Year holiday until the official resumption of work on February 10. However, as the epidemic intensified, many regions postponed the resumption of work again. Due to stricter government and manufacturer controls requiring personnel returning from other provinces and cities to self-isolate for 14 days, even factories that have resumed operations have difficulty immediately restoring manpower. According to LEDinside's survey, most LED manufacturers are quite conservative about the resumption rate, with an estimated resumption rate of 50-70% in mid-February. The production schedule delays caused by the delayed resumption of work will inevitably impact the overall industry. For the LED industry, from upstream sapphire substrates and chip manufacturing to downstream packaging and subsequent application production, the degree of impact varies depending on the factory location, manpower needs, and inventory levels. From the LED chip production side, since the LED industry was in a state of oversupply in 2019, chip manufacturers still have accumulated products from last year for sale, so production delays will not cause an impact in the short term. However, due to the potential disruption of the supply of chip raw materials such as sapphire substrates due to the epidemic, coupled with the delayed resumption of work and increased labor production costs, it is estimated that chip prices may start to rise after March. Downstream LED packaging manufacturers are more significantly affected by the delayed resumption of work than upstream chip manufacturers because packaging plants have high labor demands and are mostly located in Guangdong and Jiangxi provinces, with employees mostly being migrant workers from various parts of China. If the resumption of work is poor and labor shortages persist, it will directly affect production. Also, because the inventory levels of packaging plants are lower, the demand for resumption of work is more urgent. In terms of end-use applications, Hubei, as a major automotive production center in China, has been severely affected by the epidemic. Since the resumption of work is still uncertain, the lack of related components has also affected subsequent automotive production, leading to an impact on automotive LEDs. The impact on panel production and backlight modules also comes from the shortage of upstream raw material supply. Although panel manufacturers have gradually resumed production, if there is a lack of materials, the factory operating rate is expected to decrease in March. At the same time, the rapidly increasing number of confirmed cases in South Korea has also begun to impact local panel production. In addition to production delays, the pneumonia epidemic currently spreading globally has led to the cancellation or postponement of many major exhibitions. The MWC, a major mobile phone industry event originally scheduled for the end of February, was canceled on February 12, and Light+Building, the biennial Frankfurt lighting exhibition, has been postponed from March to September.
2020-04-14
On April 2, the State Administration of Market Regulation (SAMR) announced the postponement of the implementation of 13 national standards, including the "Energy Efficiency Limits and Energy Efficiency Grades for Unit Air Conditioners." The announcement stated that due to the impact of the novel coronavirus pneumonia epidemic, the SAMR decided to postpone the implementation date of 8 national standards, including the "Energy Efficiency Limits and Energy Efficiency Grades for Unit Air Conditioners," from May 1, 2020, to November 1, 2020, and the implementation date of 5 national standards, including the "Water Efficiency Limits and Water Efficiency Grades for Faucets," from July 1, 2020, to January 1, 2021. Two of the 13 standards relate to the LED lighting industry: "Energy Efficiency Limits and Energy Efficiency Grades for Indoor LED Lighting Products" and "Energy Efficiency Limits and Energy Efficiency Grades for LED Road and Tunnel Lighting Fixtures." Both of these standards have been postponed to November 1, 2020. (Source: State Administration of Market Regulation)
Proven effective! UV LED can kill 99.9% of coronaviruses within 30 seconds
2020-04-14
SeoulViosys and SETi announced that their VioLEDs UV-LED technology successfully killed 99.9% of the novel coronavirus (COVID-19) within 30 seconds. The news shows that SeoulViosys and a research team from Korea University used mass-produced Violeds compound semiconductor technology for the test. This research demonstrated the strong sterilization effect of Violeds UV-LED light source on the novel coronavirus after irradiation for 30 seconds. The study also found that the sterilization effect would be stronger if the coronavirus was placed closer to the light source and the irradiation time was extended. In addition to testing the coronavirus, the research team also proved that the Violeds technology achieved a 99.9% sterilization rate against harmful bacteria such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Salmonella typhi.
2020-08-12
Light-emitting diodes (LEDs) are commonly used light-emitting devices that produce light through the recombination of electrons and holes, releasing energy in the process. They are widely used in lighting applications. LEDs efficiently convert electrical energy into light energy. LED lighting products generally have a long lifespan, good lighting effects, and energy-saving features. Due to these advantages over traditional lighting, they have wide applications in modern society, such as general illumination, flat panel displays, and medical devices. However, a major challenge facing LEDs is their manufacturing cost. The inability to reduce costs leads to higher prices for LED lighting, which is a significant factor limiting their wider adoption. Yijingyuan Optoelectronics is continuously making technological breakthroughs, striving to reduce costs while maintaining quality to lower selling prices. We look forward to Yijingyuan Optoelectronics, and other LED chip factories, overcoming technological challenges to enable wider adoption and use of LED lighting.
How to distinguish the positive and negative poles of SMD LED beads?
2020-09-17
Many surface mount LEDs, such as 0603 and 0805 packages, have a green "T" symbol on the bottom. The horizontal line of the "T" indicates the positive pole on one side and the negative pole on the other. Some SMD LEDs have a triangle symbol silkscreened on them, with the positive pole near the base and the negative pole near the apex. Generally, the positive lead of an LED is longer than the negative lead. When viewed from the side, the smaller lead is the positive pole and the larger lead is the negative pole. Set the multimeter to the "Ohm x1" range. When the LED is lit, the red probe is connected to the positive terminal of the SMD LED and the black probe is connected to the negative terminal. Since the LED has a turn-on threshold of around 1.5-1.8V, the voltage provided by the digital multimeter may not be sufficient to activate it. Therefore, it is still necessary to refer to the markings. For surface mount LEDs, the side with the green dot is the negative pole, and the opposite side is the positive pole.
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