The maturing of the LED lighting application market

A Mackman hearing was held last month in which patents from both parties were meticulously compared side-by-side for similarities. The case was ruled in Everlight’s favor.The legal actions taken by Taiwanese LED packaging manufacturer against Nichia Corp is part of the company’s ongoing effort to enfore its intellectual property rights as well as safeguard its customers from litigation attacks by Nichia. The two companies are both major players in the LED manufacturing industry.

The maturing of the LED lighting application market has not only seen LED manufacturers aggressively increasing LED luminosity, but also gradually placing more and more attention on the importance in color rendering performance for LED products. Mitsubishi has stated that in the past most sapphire wafers included yellow phosphor in order to create white light, but that the color rendering performance was lack luster. With the evolution of phosphor technology, sapphire wafers to create white light can now also contain green and red phosphor and the same effect happens when UV wafers are paired with red, blue, and green phosphor. This has a clear improvement on color rendering.

According to information presented by Mitsubishi during LED Taiwan conference, phosphor technology is continuing to improve driving the development of imitation sunlight LED light module technology. In the past, adding yellow phosphor to sapphire wafers was the most used technique for producing white light. Mitsubishi believes that this method not only produces low quality in color rendering performance, but also poor color reproducibility.


Due to the visible light wavelength composition of sunlight consisting of red, blue, green, and yellow light, LEDs need to be used in order to get a natural light effect and widen the wavelength of the light spectrum. Sapphire wafers paired with yellow phosphor compared with those paired with blue and yellow (or green) to create white light have a clear peak, but adding in red light weakens that peak. Therefore, when white light is cast onto a red object, such as an apple, the color instead can appear brown.

you can link to:nichia chip led high bay light