A "World War" about phosphors

With the expansion of LED lighting applications in the interior, how to develop a more suitable lighting for indoor lighting has become the focus of many companies. In fact, the industry's pursuit of high color rendering index and high luminous efficiency for LED lighting products has never stopped. However, in theory, high color rendering index and high luminous efficiency are a pair of contradictory bodies, there is an inverse relationship, how to find the balance between them is the key to indoor lighting technology breakthroughs.

Industry insiders pointed out that LED interior lighting fixtures in the future must have high visibility and high luminous efficiency. There is no sign that there is no light art at all. It is well known that the color rendering index of white LEDs should be improved. In addition to the use of high-significant chips, it is necessary to work harder on phosphors.

Sino-US Confrontation LED Phosphor Counterparts

The phosphor market experienced a declining price in 2012 and formed a basic market structure. Up to now, the top 3 domestic market share rankings are: InterTech America, Research Rare Earth, and Taiwan Hongdae. These three companies occupy China. About 60% market share. Although through the price war in 2012, some domestic phosphor manufacturers rapidly occupied some markets. Among these vendors, apart from researching rare earths, they possessed nearly 20 Chinese-mandated invention patents and seven foreign authorized invention patents from the United States, Japan, and South Korea. All other manufacturers have patent risks.

Although China's research in the field of phosphors started late, it was time for the National Semiconductor Lighting Project to really put the LED phosphor on the agenda. However, with the rapid development of technology, we can still see the progress made in domestic phosphors.

Intermec high color rendering white phosphors are not afraid of patent challenges

According to the general manager of the senior business director of the United States and China, China, the biggest advantage of Intel is its patent. InterTech currently has more than 160 granted patents, more than 300 pending patents, and more than 100 authorized U.S. patents worldwide, in all major markets including the United States, South Korea, Japan, China Taiwan, China and Europe. Both have applied for patents and patents cover compositions and LED applications.

Fujian and Taiwan cooperate to develop white LED red phosphor

With the support of Fujian Province and the Chinese Academy of Sciences, Chen Xueyuan’s research group cooperated with the research team of Liu Ruyi of Taiwan University to successfully prepare a new type of high-efficiency warm-white LED red fluorescent powder for the first time using ion exchange methods.

The red phosphors successfully prepared by this research team are suitable for the excitation of blue chips. The luminous efficiency at room temperature is 98%, which is superior to most of the existing red phosphors, and has good fluorescence thermal stability. At the same time, the developed ion exchange preparation method has a simple process, can be prepared at room temperature and atmospheric pressure, and the raw material price is low, so it has a good market application prospect. The research has been published online in the internationally renowned "Nature Communications" magazine and has applied for two Chinese invention patents.