Invention Grant
- Patent Title: High color rendering index fluorescent lamp with multi-layer phosphor coating
- Patent Title (中): 高显色指数荧光灯具有多层荧光粉涂层
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Application No.: US13870088Application Date: 2013-04-25
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Publication No.: US09142397B2Publication Date: 2015-09-22
- Inventor: Fangming Du , Heidi M. Anderson , William Erwin Cohen , Stephen Lloyd Killion , Adam Jason Burns
- Applicant: GENERAL ELECTRIC COMPANY
- Applicant Address: US NY Schenectady
- Assignee: GENERAL ELECTRIC COMPANY
- Current Assignee: GENERAL ELECTRIC COMPANY
- Current Assignee Address: US NY Schenectady
- Agency: GE Global Patent Operation
- Agent Peter T. DiMauro
- Main IPC: H01J61/44
- IPC: H01J61/44 ; H01J9/00 ; C09K11/77 ; 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.
Public/Granted literature
- US20130234583A1 HIGH COLOR RENDERING INDEX FLUORESCENT LAMP WITH MULTI-LAYER PHOSPHOR COATING Public/Granted day:2013-09-12
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