| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device with high take-out efficiency of light in a light-emitting device, wherein a light is emitted from a light-emitting element, such as a light-emitting diode (LED) or the like. <P>SOLUTION: An air bubble support body 52 with a large difference of refractive index between an air bubble 521 and its peripheral members is provided on a light extraction surface 50a of a sapphire 50. The air bubble support body 52 is translucent against emission wavelength and is made of silicon or the like with a refractive index of 1.77 or larger. The body is provided with an air bubble support layer that supports a plurality of air bubbles formed of air with a refractive index of about one, and a gas such as an inert gas. Thus, when a light, emitted from a light emission part, is scattered in the air bubble supporting body 52, the scattered light expands and prevents repeated complete reflection in the light-emitting device, thereby improving the light extraction efficiency. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
