WHITE LIGHT SOURCE AND LED LIGHTING DEVICE

• Main Authors: TSUKATANI TOSHIHIKO, TSUMORI TOSHIHIRO, MINOWA TAKEHISA
• Format: Patent
• Language: English; Japanese
• Published: 16.08.2018
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; BLASTING; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; POLISHES; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

SOLUTION: The white light source includes: an excitation light source; a fluorescent member; a blue LED element having a single emission peak with a wavelength of 440 nm or more and 465 nm or less; a blue green LED element having a single emission peak whose wavelength is longer than the single emission peak of the blue LED element by 10 nm or more and 480 nm or less; and a fluorescent member containing a phosphor which is excited by the excitation light from the LED element and emits light having a longer wavelength than the excitation light. The white light source is of a remote phosphor type with an emission color temperature of 3500 K or more.EFFECT: A white light source and an LED lighting device with excellent color rendering properties can be stably and easily provided while ensuring a blue-green component in the luminescent component.SELECTED DRAWING: Figure 3 【解決手段】励起光源と蛍光部材とを備え、波長が４４０ｎｍ以上４６５ｎｍ以下の単一発光ピークを有する青色ＬＥＤ素子と、波長が、青色ＬＥＤ素子の上記単一発光ピークより１０ｎｍ以上長く、かつ４８０ｎｍ以下である単一発光ピークを有する青緑色ＬＥＤ素子とを含み、蛍光部材が、ＬＥＤ素子からの励起光により励起されて、励起光より長波長の光を発光する蛍光体を含み、発光色温度が３５００Ｋ以上であるリモートフォスファー方式の白色光源。【効果】発光成分中の青緑色の成分を確保した上で、安定して容易に、演色性に優れた白色光源及びＬＥＤ照明装置を提供することができる。【選択図】図３