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:
Nov. 27, 2012
Filed:
Apr. 29, 2011
Chul Hee Yoo, Suwon, KR;
Young June Jeong, Suwon, KR;
Young Sam Park, Seoul, KR;
Seong Yeon Han, Gwangju, KR;
Ho Yeon Kim, Incheon, KR;
Hun Joo Hahm, Sungnam, KR;
Hyung Suk Kim, Suwon, KR;
Chul Hee Yoo, Suwon, KR;
Young June Jeong, Suwon, KR;
Young Sam Park, Seoul, KR;
Seong Yeon Han, Gwangju, KR;
Ho Yeon Kim, Incheon, KR;
Hun Joo Hahm, Sungnam, KR;
Hyung Suk Kim, Suwon, KR;
Samsung LED Co., Ltd., Suwon-si, KR;
Abstract
A white light emitting device including: a blue light emitting diode chip having a dominant wavelength of 443 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.