公开(公告)号：US20130234583A1

公开(公告)日：2013-09-12

申请号：US13870088

申请日：2013-04-25

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Fangming DU ,  Heidi M. ANDERSON ,  William Erwin COHEN ,  Stephen Lloyd KILLION ,  Adam Jason BURNS

IPC: H01J61/44

CPC classification number: H01J61/44 ,  C09K11/7734 ,  C09K11/7777 ,  C09K11/7787 ,  H01J61/48

Abstract: Described are methods and apparatus for providing fluorescent lamps having a two-layer phosphor coating that includes a base coating and a top coating that economically provides a high color rendering index (CRI) of at least 87 with improved brightness. In an embodiment, a low-pressure discharge lamp includes a light transmissive envelope having a basecoat phosphor layer disposed on an inner surface, wherein the basecoat phosphor layer includes less than ten percent weight of a rare earth phosphor. Also included is a topcoat phosphor layer on a surface of the base coat phosphor layer that includes a blend of at least red, green, green-blue and blue emitting rare earth phosphors, and a fill gas composition within the light transmissive envelope.

Abstract translation: 描述了用于提供具有双层荧光粉涂层的荧光灯的方法和装置，其包括基底涂层和顶涂层，其经济地提供至少87的具有改善的亮度的高显色指数（CRI）。 在一个实施例中，低压放电灯包括透光外壳，其具有设置在内表面上的底涂荧光体层，其中底涂荧光体层包括少于10重量％的稀土荧光体。 还包括在底涂层荧光体层的表面上的面漆荧光体层，其包括至少红色，绿色，绿色和蓝色和蓝色的稀土荧光体的共混物，以及透光外壳内的填充气体组合物。