Kenichi Yamada

TL;DR: In this article, the optical structures and luminous properties of light source devices composed of blue LEDs and YAG phosphor were examined using optical simulation, and it was shown that using light reflected from the phosphor is an effective way of obtaining high output from light sources composed of LEDs and phosphor.

TL;DR: In this article, a resist curable resin material composed mainly of a curable prepolymer and a flame-retarding agent containing a hydrated metal compound and a brominated epoxy compound are mixed to produce a resist-curable resin composition.

TL;DR: In this paper, a light emitting device composed by combining an LED light emitter composed by mounting an LED chip 2 on a mounting board 4 and a wavelength converter 3 including a phosphor was manufactured by measuring the color tone of emitted light on the basis of the light emission of the LED chip at the front of the wavelength converter.

TL;DR: In this article, the authors proposed an LED light-source device for illumination in which a temperature rise is suppressed even if integration at high density is performed, and from which high optical output power and efficient as well as uniform surface emission of light are obtained, and an illuminator using the same.

TL;DR: In this paper, a surface light source with a LED that supplies a uniform strong illumination without leaking ultraviolet rays generated even in case an ultraviolet LED is used is presented, where a one side-opened box-like, wood container-like or dome-like reflector 3 with a fluorescent body 4, LED elements 1 for irradiating the reflectors 3, and a transparent panel 5 with power cut-off means arranged to cover the opened side of the reflector without transmitting ultraviolet rays.