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:
Mar. 08, 2011
Filed:
Feb. 07, 2007
Masahiro Sakai, Kyoto, JP;
Seigo Shiraishi, Osaka, JP;
Takehiro Zukawa, Osaka, JP;
Kojiro Okuyama, Nara, JP;
Masahiro Sakai, Kyoto, JP;
Seigo Shiraishi, Osaka, JP;
Takehiro Zukawa, Osaka, JP;
Kojiro Okuyama, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention is a blue phosphor that is represented by a general formula xSrO.yEuO.MgO.zSiO, where 2.970≦x≦3.500, 0.006≦y≦0.030, and 1.900≦z≦2.100. This blue phosphor has a crystal structure that is essentially a merwinite structure, and the crystal structure has a unit cell volume of 714.8 Åor less. Or, in this blue phosphor, a peak appearing around 2θ=22.86 degrees in an X-ray diffraction pattern obtained by measurement of the blue phosphor using an X-ray with a wavelength of 0.773 Å has a one-fifth value width of 0.17 degrees or less. Furthermore, the present invention is a light-emitting device having a phosphor layer including the phosphor. A suitable example of the light-emitting device is a plasma display panel.