Low power discharge lamp with high efficacy

Details Low power discharge lamp with high efficacy Low power discharge lamp with high efficacy

2008-03-07

2011-10-04

Patel, Nimeshkumar (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S493000, C313S588000, C313S573000, C313S641000

Reexamination Certificate

active

08030847

ABSTRACT:
In order to achieve a discharge lamp suited to operate under reduced nominal power of e.g. 20-30 W, a lamp is proposed with two electrodes (24) arranged at a distance in a discharge vessel (20, 120) for generating an arc discharge. The discharge vessel (20, 120) has a filling with a substantially free of mercury and comprises a metal halide and a rare gas. The lamp (10, 110) further comprises an outer bulb (18) arranged around the discharge vessel at a distance (d2). The outer bulb (18) is sealed and has a gas filling of a thermal conductivity (λ). The inner diameter (d1) of the discharge vessel is preferably in a range from 2-2.7 mm. The wall thickness (w1) is in a range from 1.4-2 mm. A heat transition coefficient (λ/d2) is calculated as thermal conductivity (λ) at 800° C. of the outer bulb filling divided by the distance (d2). The so-defined heat10transition coefficient is below 150 W/(m2K).

REFERENCES:
patent: 4161672 (1979-07-01), Cap et al.
patent: 4594529 (1986-06-01), De Vrijer
patent: 4622485 (1986-11-01), Miyashita et al.
patent: 5359255 (1994-10-01), Kawai et al.
patent: 5736811 (1998-04-01), Westemeyer et al.
patent: 6724145 (2004-04-01), Muto et al.
patent: 6853140 (2005-02-01), Lapatovich et al.
patent: 7098596 (2006-08-01), Takagaki et al.
patent: 2003/0117074 (2003-06-01), Lapatovich et al.
patent: 2005/0134182 (2005-06-01), Ishigami et al.
patent: 2005/0248278 (2005-11-01), Wijenberg et al.
patent: 2006/0049764 (2006-03-01), Bedynek et al.
patent: 2006/0202627 (2006-09-01), Dudik et al.
patent: 2006/0244384 (2006-11-01), Genz et al.
patent: 2009/0108756 (2009-04-01), Eisemann
patent: 10163584 (2003-04-01), None
patent: 0883160 (1998-12-01), None
patent: 1037257 (2000-09-01), None
patent: 1063681 (2000-12-01), None
patent: 1150337 (2001-10-01), None
patent: 05290804 (1993-11-01), None
patent: 2006344579 (2006-12-01), None
patent: 2008007283 (2008-01-01), None
patent: 2008007284 (2008-01-01), None
Kestin et al: “Equilibrium and Transport Propterties of the Noble Gases and Their Mixtures At Low Density”; Journal of Physical and Chemical Reference Data, vol. 13, No. 1, 1984, pp. 229-303.
Uribe et al: “Thermal Conductivity of Nine Polyatomic Gases At Low Density”; Journal of Physical and Chemical Reference Data, vol. 19, No. 0.5, 1990, pp. 1123-1136.
David R. Lide, Ed: “Thermal Conductivity of Gases”; CRC Handbook of Chemistry and Physics, 88th Edition, vol. 88, 2008, pp. 6-184-6-185.

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