| 摘要 |
The purpose of the invention is to form a uniform phosphor layer on an LED device by suppressing precipitation of the phosphor in a phosphor dispersion liquid. The present invention provides a phosphor dispersion liquid in which phosphor particles, stratified clay mineral microparticles, and oxide microparticles are dispersed in a solvent, wherein when a glass bottle of a 15-mm inner diameter is filled with 5 ml of the phosphor dispersion liquid and left standing, the time taken for a top clear liquid layer to form due to precipitation of the phosphor particles is four hours or longer. The viscosity of the phosphor dispersion liquid is preferably 80 to 1000 cp. |
