An LED lamp using the "Kurumusu" phosphor developed by Koito (right) and a common LED lamp (left)
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Koito Manufacturing Co Ltd exhibited an LED lamp that can improve red color while reducing glare at Ceatec Japan 2017, which took place from Oct 3 to 6, 2017, at Makuhari Messe in Chiba Prefecture, Japan.

"They do not seem to be the same red apple," an engineer who works for the company said.

The LED lamp was developed by placing a newly-developed plastic phosphor on a purple LED chip. Koito plans to find purchasers in the aim of starting volume production.

The name of the phosphor developed by Koito is "Kurumusu." It is formed by mixing a compound called "chlorometasilicate" with plastic. It absorbs light emitted from LED and produces "soft light" because, with the phosphor, it becomes possible to lower luminance while keeping brightness. When light of the new lamp is directed to human skin, paleness can be reduced, compared with conventional LEDs, making the skin look healthy.

The commercialization of the lamp is in progress. Koito developed a lamp for TV news anchors in cooperation with Japan Broadcasting Corp (NHK). It is placed on the desk of an anchor to direct light to his/her face from below.

"We will expand the application to places where color expression is important," the company said.

Koito aims to introduce the lamp to art museums, exhibition halls, etc. When the lamp is used as an in-vehicle lamp of an ambulance, the images of a patient's blood, facial color, etc can be sent to a hospital without changing their colors much. The company seems to be promoting the lamp, considering that there is a high demand for it.

Original Japanese article