The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2015
Filed:
Feb. 06, 2012
Hyong Sik Won, Suwon-si, KR;
Seong Min Kim, Cheonan-si, KR;
Chan Suk Min, Suwon-si, KR;
Chul Soo Yoon, Suwon-si, KR;
Hyong Sik Won, Suwon-si, KR;
Seong Min Kim, Cheonan-si, KR;
Chan Suk Min, Suwon-si, KR;
Chul Soo Yoon, Suwon-si, KR;
SAMSUNG ELECTRONICS CO., LTD., Suwon Si, KR;
Abstract
The fluorescent substance according to one embodiment of the present invention has the following compositional formula (1): [Compositional formula 1] SrSiAlON:Re. Here, x, y and z are respectively 0.005≦x≦0.05, 0.05≦y≦0.5, 0.001≦z≦0.50, and Re is a rare earth element. As a result, the fluorescent substance according to one embodiment of the present invention can exhibit a short wavelength of between 525 nm and 537 nm when the concentration of strontium is between 0.05 moles and 0.5 moles. Also, the fluorescent substance can exhibit a short wavelength of between 525 nm and 537 nm by the addition of barium in a range of between 0.003 moles and 0.125 moles when the concentration of aluminium is high. Also, the fluorescent substance can exhibit a short wavelength of between 525 nm and 537 nm by adjusting the oxygen concentration by the addition not only of AlN but also of AlOas an aluminium precursor when the concentration of aluminium is high. Ultimately, since the fluorescent substance according to one embodiment of the present invention can exhibit a short wavelength of between 525 nm and 537 nm, it is possible to prevent dropoff in colour reproduction and the colour rendering index.