METHOD OF DETERMINING CHROMATICITY RANK OF LIGHT EMITTING DEVICE

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United States of America Patent

APP PUB NO 20180024006A1
SERIAL NO

15655960

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Abstract

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A method of determining a chromaticity rank of a light emitting device includes selecting the light emitting device having a chromaticity rank in a region surrounded by four defining points on a 1931 CIE Chromaticity Diagram. A ratio of a distance in a y-direction between, of the four defining points, two defining points furthest from each other in the y-direction to a distance in an x-direction between, of the four defining points, two defining points furthest from each other in the x-direction is 0.5 or less A peak light emission wavelength of the blue light emitting element is in a range of 447 to 452 nm, a peak light emission wavelength of the green light emitting element is in a range of 520 to 541 nm, and a peak light emission wavelength of the red light emitting element is in a range of 630 to 632 nm.

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Patent Owner(s)

Patent OwnerAddress
NICHIA CORPORATION491-100 OKA KAMINAKA-CHO ANAN-SHI TOKUSHIMA 774-8601

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
AKAGAWA, Seitaro Komatsushima-shi, JP 15 13
HASHIMOTO, Toshiyuki Komatsushima-shi, JP 15 117
NISHIGAKI, Kentaro Osaka-shi, JP 3 0

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