Illumination method and light-emitting device

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United States of America Patent

PATENT NO 9305970
SERIAL NO

14196662

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Abstract

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To provide an illumination method and a light-emitting device which are capable of achieving, under an indoor illumination environment where illuminance is around 5000 lx or lower when performing detailed work and generally around 1500 lx or lower, a color appearance or an object appearance as perceived by a person, will be as natural, vivid, highly visible, and comfortable as though perceived outdoors in a high-illuminance environment, regardless of scores of various color rendition metric. Light emitted from the light-emitting device illuminates an object such that light measured at a position of the object satisfies specific requirements. A feature of the light-emitting device is that light emitted by the light-emitting device in a main radiant direction satisfies specific requirements.

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Patent Owner(s)

  • CITIZEN ELECTRONICS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Horie, Hideyoshi Odawara, JP 43 495

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