At present, the price of similar LED lamps in the market is more than ten times different, and these lamps are all named as energy-saving, safe and environmentally friendly. Faced with these, we can't help but wonder: How to distinguish the advantages and disadvantages of LED lamps?
Frequent LED accidents
According to Hong Kong media, on April 23 this year, a fire broke out at the Harbour Grand Hong Kong. Guo Yongqiu, the commander of the Fire Eastern Region, said that the cause of the fire was that the LCD screen on the rooftop was on fire, and the fire debris scattered caused the fire. Subsequently, firefighters evacuated about 300 residents and staff, and one of them was sent to hospital for treatment.
Coincidentally, at 13:00 on February 17 this year, at No. 450, Longjing Middle Road, Qinhuai District, Nanjing, when Mr. Yuan walked out of the house, he found that a 100-square-meter LED advertising display on the south side of the building was running out of smoke.
On New Year's Day in 2011, the LED display of the traffic building of Lecheng Street in Guangdong smoked and ignited. The smoke rising from the sky was clearly visible, and the fire continued for half an hour.
In October last year, the LED advertising screen on the outer wall of the new library of Guangzhou Library was on fire in the Huacheng Square of Zhujiang New Town in Guangzhou, and many people who came to Huacheng Square to watch the International Lighting Festival witnessed this “spectacular†scene. It is a program of entertainment. An eyewitness said that he also felt that the three-dimensional effect of the lights and LED screens was very realistic...
LED companies overseas development blocked
The downturn in the development of China's LED companies is still coming, but it seems to be coming a little faster, making the company unprepared. Since the beginning of this year, China’s LED companies have stopped production on a large scale, and even the news of bankruptcy has been rampant. This is in stark contrast to the previous LED companies’ listings.
The lack of core technology is a huge problem facing China's LED industry and exports. Solumei (China) Optoelectronics Co., Ltd. and Beijing Opal Lighting Equipment Co., Ltd. respectively said that their chips were imported from South Korea and Taiwan. Deputy General Manager Yang Jian of Beijing Oplet Lighting Equipment Co., Ltd. pointed out that Taiwan's chips are much more expensive, but in order to meet customer requirements, quality must be guaranteed.
LED 殇: disorderly competition
The person in charge of Sulumei Company said that in the LED industry chain, including LED epitaxial wafer production, LED chip production, LED chip packaging and LED product application, the epitaxial wafer has the highest technical content, and the chip is second. . For a long time, China is a major exporter of LED packaging. Enterprises are mainly concentrated in the packaging field with low technological content in the downstream of the industrial chain, and rely on absolute price advantage to gain a position in the export market. The upper and middle reaches of the field has only begun to develop in China in recent years. The domestic LED chip supply capacity is still far from meeting the needs, and many LED manufacturers have to rely heavily on imports. There are only a few companies in China that are engaged in chip research and development and production, most of which are government-supported enterprises.
He Zhe, regional manager of dry bulb lighting in North China, said that the export of its products is closely related to foreign trade barriers. From the development trend of LED export, the establishment of foreign technical barriers will be more and more, the most important thing for domestic enterprises is to practice internal strength and guarantee the quality of export products.
According to relevant sources, the phenomenon of low-priced sales between LED export enterprises is very serious. As a large exporting country of LED downstream industry, most small and medium-sized LED export enterprises rely on low cost to make profits in overseas markets due to the intensified competition in the industry. According to the survey, in order to earn back the cost difference, the enterprises that pass the low-price export have no guarantee on the quality of the products, which makes overseas consumers doubt the quality of China's LED products, seriously affecting the reputation of China's LED products and worsening the export of the industry. The environment has brought great influence to domestic export enterprises.
LED market standard is missing
Yang Jian said: "There is no European standard in this industry, and there is no national standard. It is based on the standards of customers." Zhang Yugang of Solumei said: "Some customers are reluctant to use good quality advertising lighting because they use advertising screens. The life expectancy is very low. But at the same time, they also overlook the safety risks of poor quality lighting equipment."
Referring to how consumers identify LED lighting equipment, Hezhe said that their products have passed the test of Xiamen National Semiconductor Testing Institute. These tests are solely for self-improvement and strive for customer trust. However, the state does not stipulate which tests to be carried out, which leads to uneven quality of lighting products.
Referring to the difficulty of formulating LED standards, Zhang Yugang believes that LED is a cross-industry semiconductor material, which is not only widely used in lighting equipment, but also plays an important role in display screens, computers and mobile phones. Therefore, the industries involved in LEDs are not Brightness also makes the formulation of government departments unclear.
For the current hidden dangers of LED lighting equipment and the aspects that should be involved in the formulation of standards, Hezhe believes that for LED itself, factors such as color temperature and light decay determine the quality of semiconductor materials. Power supply, heat dissipation and board determine the safety of lighting equipment. Sex and service life. A good semiconductor can have a luminous age of 10 years, but the drive is often damaged in a year or two. At the same time, if the insulation performance of the driver is not good, it will cause leakage; if the heat is not good, it will break down the circuit board and cause disaster.
Yang Jian said that the light of LED lighting is mainly blue light, and the penetrating power is strong. The long-term exposure to high-brightness light is harmful to the human eye. In the standard setting, the brightness requirements of the lamp should also be considered, especially the residents. Neon lights and interior lighting around the area.
Frequent LED accidents
According to Hong Kong media, on April 23 this year, a fire broke out at the Harbour Grand Hong Kong. Guo Yongqiu, the commander of the Fire Eastern Region, said that the cause of the fire was that the LCD screen on the rooftop was on fire, and the fire debris scattered caused the fire. Subsequently, firefighters evacuated about 300 residents and staff, and one of them was sent to hospital for treatment.
Coincidentally, at 13:00 on February 17 this year, at No. 450, Longjing Middle Road, Qinhuai District, Nanjing, when Mr. Yuan walked out of the house, he found that a 100-square-meter LED advertising display on the south side of the building was running out of smoke.
On New Year's Day in 2011, the LED display of the traffic building of Lecheng Street in Guangdong smoked and ignited. The smoke rising from the sky was clearly visible, and the fire continued for half an hour.
In October last year, the LED advertising screen on the outer wall of the new library of Guangzhou Library was on fire in the Huacheng Square of Zhujiang New Town in Guangzhou, and many people who came to Huacheng Square to watch the International Lighting Festival witnessed this “spectacular†scene. It is a program of entertainment. An eyewitness said that he also felt that the three-dimensional effect of the lights and LED screens was very realistic...
LED companies overseas development blocked
The downturn in the development of China's LED companies is still coming, but it seems to be coming a little faster, making the company unprepared. Since the beginning of this year, China’s LED companies have stopped production on a large scale, and even the news of bankruptcy has been rampant. This is in stark contrast to the previous LED companies’ listings.
The lack of core technology is a huge problem facing China's LED industry and exports. Solumei (China) Optoelectronics Co., Ltd. and Beijing Opal Lighting Equipment Co., Ltd. respectively said that their chips were imported from South Korea and Taiwan. Deputy General Manager Yang Jian of Beijing Oplet Lighting Equipment Co., Ltd. pointed out that Taiwan's chips are much more expensive, but in order to meet customer requirements, quality must be guaranteed.
LED 殇: disorderly competition
The person in charge of Sulumei Company said that in the LED industry chain, including LED epitaxial wafer production, LED chip production, LED chip packaging and LED product application, the epitaxial wafer has the highest technical content, and the chip is second. . For a long time, China is a major exporter of LED packaging. Enterprises are mainly concentrated in the packaging field with low technological content in the downstream of the industrial chain, and rely on absolute price advantage to gain a position in the export market. The upper and middle reaches of the field has only begun to develop in China in recent years. The domestic LED chip supply capacity is still far from meeting the needs, and many LED manufacturers have to rely heavily on imports. There are only a few companies in China that are engaged in chip research and development and production, most of which are government-supported enterprises.
He Zhe, regional manager of dry bulb lighting in North China, said that the export of its products is closely related to foreign trade barriers. From the development trend of LED export, the establishment of foreign technical barriers will be more and more, the most important thing for domestic enterprises is to practice internal strength and guarantee the quality of export products.
According to relevant sources, the phenomenon of low-priced sales between LED export enterprises is very serious. As a large exporting country of LED downstream industry, most small and medium-sized LED export enterprises rely on low cost to make profits in overseas markets due to the intensified competition in the industry. According to the survey, in order to earn back the cost difference, the enterprises that pass the low-price export have no guarantee on the quality of the products, which makes overseas consumers doubt the quality of China's LED products, seriously affecting the reputation of China's LED products and worsening the export of the industry. The environment has brought great influence to domestic export enterprises.
LED market standard is missing
Yang Jian said: "There is no European standard in this industry, and there is no national standard. It is based on the standards of customers." Zhang Yugang of Solumei said: "Some customers are reluctant to use good quality advertising lighting because they use advertising screens. The life expectancy is very low. But at the same time, they also overlook the safety risks of poor quality lighting equipment."
Referring to how consumers identify LED lighting equipment, Hezhe said that their products have passed the test of Xiamen National Semiconductor Testing Institute. These tests are solely for self-improvement and strive for customer trust. However, the state does not stipulate which tests to be carried out, which leads to uneven quality of lighting products.
Referring to the difficulty of formulating LED standards, Zhang Yugang believes that LED is a cross-industry semiconductor material, which is not only widely used in lighting equipment, but also plays an important role in display screens, computers and mobile phones. Therefore, the industries involved in LEDs are not Brightness also makes the formulation of government departments unclear.
For the current hidden dangers of LED lighting equipment and the aspects that should be involved in the formulation of standards, Hezhe believes that for LED itself, factors such as color temperature and light decay determine the quality of semiconductor materials. Power supply, heat dissipation and board determine the safety of lighting equipment. Sex and service life. A good semiconductor can have a luminous age of 10 years, but the drive is often damaged in a year or two. At the same time, if the insulation performance of the driver is not good, it will cause leakage; if the heat is not good, it will break down the circuit board and cause disaster.
Yang Jian said that the light of LED lighting is mainly blue light, and the penetrating power is strong. The long-term exposure to high-brightness light is harmful to the human eye. In the standard setting, the brightness requirements of the lamp should also be considered, especially the residents. Neon lights and interior lighting around the area.
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