Back to results
US 7,468,147 B2Granted
Fluorescent substance and light-emitting device using the same
AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorsNaomi Shida, Masaaki Tamatani, Yoshihito Tsutsui, Kazuaki Ootsuka, Ryosuke Hiramatsu
Life of this patent
Estimating the term…
Abstract
Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.
Claims20
A fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La and Cs.
A light-emitting device comprising:
- a light-emitting element emitting light at wavelength of 360 nm to 500 nm;
- and
- a layer comprising fluorescent substance formed on the light-emitting element, the fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La and Cs.
Dependencies are inferred from the claim text.