LIGHTING DEVICE

• Main Authors: TAKAMATSU TOMONAO, YAMAMOTO YUICHIRO, ONO HIROSHI, KATO MITSUAKI
• Format: Patent
• Language: English; Japanese
• Published: 08.03.2018
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

PROBLEM TO BE SOLVED: To provide a thin light guide body having high luminaire efficiency, and to provide a lighting device using the same.SOLUTION: A light guide body includes: a light guide part; an incidence plane; a curved face connected to the incidence plane; and an introduction part connected to the light guide part to introduce light to the light guide part. An angle θ defined by a line segment connecting a first point on the incidence plane to a second point on the curved face and a normal line of the curved face on the second point satisfies a formula θ≥sin(1/n), where n represents a refraction index of the light guide body.SELECTED DRAWING: Figure 2 【課題】 高い器具効率で薄型な導光体、およびそれを用いた照明装置を提供する。【解決手段】 実施形態の導光体は、導光部と、入射面と、前記入射面と接続する湾曲面と、を有するとともに前記導光部に接続されて前記導光部に光を導く導入部と、を備え、前記入射面上の第１の点と前記湾曲面上の第２の点とを結ぶ線分と、前記第２の点における前記湾曲面の法線と、のなす角θは、前記導光体の屈折率をｎとすると、θ≧sin-1(1/n) である。【選択図】図２