LIGHT EMITTING DEVICE, LIGHTING DEVICE, IMAGE DISPLAY DEVICE AND INDICATOR LAMP FOR VEHICLES

• Main Authors: UEDA KYOTA, HIROSAKI NAOTO, INADA YUHEI
• Format: Patent
• Language: English; Japanese
• Published: 21.04.2023
• 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

To provide a light emitting device, a lighting device, an image display device and an indicator lamp for vehicles, characterized by excellent color rendering properties.SOLUTION: The present invention provides a light emitting device which comprises a phosphor comprising a crystal phase of a composition represented by formula (1): Rex(Sr1-yMAy)aMBbMCcNdOeXf (MA represents one or more elements that are selected from the group consisting of Ca, Ba, Na, K, Y, Gd and La; MB represents one or more elements that are selected from the group consisting of Li, Mg and Zn; MC represents one or more elements that are selected from the group consisting of Al, Si, Ga, In and Sc; X represents one or more elements that are selected from the group consisting of F, Cl, Br and I; Re represents one or more elements that are selected from the group consisting of Eu, Ce, Pr, Tb and Dy; and a, b, c, d, e, f, x and y respectively satisfy 0.8≤a≤1.2, 1.4≤b≤2.6, 1.4≤c≤2.6, 1.1≤d≤2.9, 1.1≤e≤2.9, 0.0≤f≤0.1, 0.0<x≤0.2, and 0.0<y≤0.7).SELECTED DRAWING: Figure 1 【課題】演色性が良好な発光装置、照明装置、画面表示装置及び車両用表示灯を提供する。【解決手段】下記式［１］で表される組成を有する結晶相を含む蛍光体を備える発光装置。Ｒｅｘ（Ｓｒ１－ｙＭＡｙ）ａＭＢｂＭＣｃＮｄＯｅＸｆ［１］（ＭＡはＣａ、Ｂａ、Ｎａ、Ｋ、Ｙ、Ｇｄ、及びＬａから選ばれる１種以上の元素。ＭＢはＬｉ、Ｍｇ、及びＺｎから選ばれる１種以上の元素。ＭＣはＡｌ、Ｓｉ、Ｇａ、Ｉｎ、及びＳｃから選ばれる１種以上の元素。ＸはＦ、Ｃｌ、Ｂｒ、及びＩから選ばれる１種以上の元素。ＲｅはＥｕ、Ｃｅ、Ｐｒ、Ｔｂ、及びＤｙから選ばれる１種以上の元素。ａ、ｂ、ｃ、ｄ、ｅ、ｆ、ｘ、ｙは、それぞれ、下記式を満たす。０．８≦ａ≦１．２、１．４≦ｂ≦２．６、１．４≦ｃ≦２．６、１．１≦ｄ≦２．９、１．１≦ｅ≦２．９、０．０≦ｆ≦０．１、０．０＜ｘ≦０．２、０．０＜ｙ≦０．７）【選択図】図１