Asahi Rubber Inc.

Saitama University

Takashi Kanahira

Masutsugu Tasaki

Eiji Ishiguro

Naoya Mashiko

Keiichi Watanuki

Keiichi Muramatsu

Kazunori Kaede

A light source that emits light, wherein, in coordinates in a CIE 1931 chromaticity diagram, the light has a color purity included in a region of 2 to 50 in a region surrounded by a line segment WB and a line segment WG that connect coordinates W (0.33, 0.33) indicating an achromatic color with coordinates B (0.091, 0.133) of 480 nm and coordinates G (0.373, 0.624) of 560 nm on a spectral locus, and the spectral locus, and has an area occupied by a continuous spectral wavelength in a wavelength region of 480 to 540 nm, of 15% or more relative to an area of an overall spectral wavelength of the light source at 380 to 780 nm.

Light source, LED device, and light emitting display structure

Provided is a lighting device that emits light of a color that approximates the color of the surface of an object or the like. Disclosed is a method for manufacturing a lighting device, including the steps of: spectroscopically measuring a spectrum that constitutes a color of a measurement target; and adjusting a color of a light source such that an emission spectrum approximates the spectrum that constitutes the color of the measurement target.

Method for manufacturing lighting device

LED lighting device in which color-mixed light according to a mixture of a blue optical emission spectrum according to the emission from an LED element, a red optical emission spectrum according to the emission from a red phosphor, and a green optical emission spectrum according to the emission from a green phosphor is emitted, wherein in the spectrum for the emitted color-mixed light, letting the relative spectral area for the principal-wavelength peak of the blue optical emission spectrum be Aand the peak emission intensity be I, letting the relative spectral area of the green optical emission spectrum be Aand the peak emission intensity be I, and letting the relative spectral area of the red optical emission spectrum be Aand the peak emission intensity be I, then I&#x3c;I, I&#x3c;I, A&#x2266;A, A&#x2266;A, and A/(A+A)&#x2266;0.4.

Reduced-blue-light LED lighting device, method of its manufacture, and LED lighting method

Growing community of inventors

Saitama, Japan

Takashi Kanahira