Method of manufacturing substantially flat compact fluorescent l

Details Method of manufacturing substantially flat compact fluorescent l Method of manufacturing substantially flat compact fluorescent l

1995-05-26

1998-02-10

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313634, 313635, H01J 6130

Patent

active

057172846

ABSTRACT:
Manufacture of a substantially flat compact fluorescent lamp using a molded cup-like continuous concentric (spiralled) channel and a circular plate, resembling a lid for the cup. The cup with the channel is coated with a light reflective layer followed by a phosphor layer (whereas the lid, on one side, is coated with the phosphor layer only) and has two holes through which two electrodes are sealed such that one of the said holes has, in addition to the electrode, an integral exhaust tubulation. The space between the cup and the lid is filled with a material capable of emitting ultraviolet under electrical excitation. Electrical discharge created between the electrodes, strictly follows the path of the channel physically imposed by the sealed structure, in spite of a nonsealed contact of the top surface of the channel walls and the plane surface of the lid. On absorption of the ultra-violet from the discharge, the phosphor emits visible radiation.

REFERENCES:
patent: 2405518 (1946-08-01), Polevitzky
patent: 2555749 (1951-06-01), Krefft
patent: 3226590 (1965-12-01), Christy
patent: 3258630 (1966-06-01), Scott
patent: 4393325 (1983-07-01), Van Der Kooi
patent: 4743799 (1988-05-01), Loy
patent: 4924143 (1990-05-01), Imamura et al.
patent: 5220249 (1993-06-01), Tsukada
patent: 5479069 (1995-12-01), Winsor
patent: 5479071 (1995-12-01), Lynn

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