Light-bulb-shaped fluorescent lamp
First Claim
1. A light-bulb-shaped fluorescent lamp, comprising:
- a bent fluorescent tube provided with a pair of electrodes at both ends and containing a mercury vapor source and a rare gas;
an electronic lighting circuit lighting the fluorescent tube; and
an outer housing, comprising a transparent globe and a case, and accommodating the bent fluorescent tube and the electronic lighting circuit;
wherein the external diameter of the globe ranges between 55 mm and 65 mm, the total length of the globe ranges between 65 mm and 80 mm, the wall thickness of the globe ranges between 0.5 mm and 1.5 mm, the internal diameter of the fluorescent tube ranges between 7 mm and 11 mm, the wall thickness of the fluorescent tube ranges between 0.6 mm and 1.2 mm, and the distance between the electrodes ranges between 200 mm and 280 mm.
3 Assignments
0 Petitions
Accused Products
Abstract
A light-bulb-shaped fluorescent lamp accommodates in an outer housing that includes a transparent globe and a case, a bent fluorescent tube that has a pair of electrodes at both ends and contains an amalgam and a rare gas, and an electronic lighting circuit lighting the fluorescent tube. A light-bulb-shaped fluorescent lamp which has high conformity to regular light bulbs and realizes the same brightness as a regular 60 W light bulb while consuming less power than a conventional light-bulb-shaped fluorescent lamp is provided by setting the external diameter of the globe in the range of 55-65 mm, the total length of the globe in the range of 65-80 mm, the internal diameter of the fluorescent tube in the range of 7-11 mm, and the distance between the electrodes in the range of 200-280 mm.
22 Citations
10 Claims
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1. A light-bulb-shaped fluorescent lamp, comprising:
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a bent fluorescent tube provided with a pair of electrodes at both ends and containing a mercury vapor source and a rare gas; an electronic lighting circuit lighting the fluorescent tube; and an outer housing, comprising a transparent globe and a case, and accommodating the bent fluorescent tube and the electronic lighting circuit;
wherein the external diameter of the globe ranges between 55 mm and 65 mm, the total length of the globe ranges between 65 mm and 80 mm, the wall thickness of the globe ranges between 0.5 mm and 1.5 mm, the internal diameter of the fluorescent tube ranges between 7 mm and 11 mm, the wall thickness of the fluorescent tube ranges between 0.6 mm and 1.2 mm, and the distance between the electrodes ranges between 200 mm and 280 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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- Resources
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Current AssigneePanasonic Corporation (Panasonic Holdings Corporation)
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Original AssigneeMatsushita Electric Corporation (Panasonic Holdings Corporation)
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InventorsNakano, Kenji, Itaya, Kenji, Iida, Shiro, Matsumura, Takeshi
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Primary Examiner(s)O'Shea, Sandra
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Assistant Examiner(s)DAY, MICHAEL HENRY
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Application NumberUS08/885,359Time in Patent Office519 DaysField of Search313/493, 313/634, 313/318.02, 313/485, 313/564, 313/565, 313/639, 313/642, 313/44, 362/260US Class Current313/493CPC Class CodesH01J 61/28 Means for producing, introd...H01J 61/34 Double-wall vessels or cont...H01J 61/56 One or more circuit element...
