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Bulb-type no-electrode fluorescent lamp and starting device of no-electrode fluorescent lamp

A lighting device, electrodeless technology, applied in the direction of electric light sources, lighting devices, circuits, etc., can solve problems such as inability to eliminate

Inactive Publication Date: 2004-08-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As disclosed in Japanese Patent Laid-Open No. 11-102667, even if gaps are added to the shielding tube to suppress eddy currents, the loss of eddy currents cannot be reduced to zero, and the phenomenon caused by the above-mentioned eddy currents cannot be eliminated.

Method used

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  • Bulb-type no-electrode fluorescent lamp and starting device of no-electrode fluorescent lamp
  • Bulb-type no-electrode fluorescent lamp and starting device of no-electrode fluorescent lamp
  • Bulb-type no-electrode fluorescent lamp and starting device of no-electrode fluorescent lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] Such as figure 1As shown, the bulb-shaped electrodeless fluorescent lamp of this embodiment includes: a luminous tube 101, in which at least luminescent gas containing mercury is sealed, and a concave portion 120 having a substantially cylindrical shape (cylindrical shape here); an induction coil 109 inserted into the The concave portion 120 has a winding wire 103 and a magnetic core (not shown); the bobbin 104 has a winding shaft portion 104a around which the winding wire 103 of the induction coil 109 is wound; the lighting circuit 105 supplies high-frequency power The induction coil 109 ; and the lamp base 107 are connected to the commercial power supply; and the housing 106 for accommodating the lighting circuit 105 is also included. Furthermore, the arc tube 101, the induction coil 109, the bobbin 104a, the lighting circuit 105, and the base 107 are integrally formed.

[0034] In the bobbin portion 104a, there are provided protrusions 108, 108, .

[0035] The pre...

Embodiment approach 2

[0057] Such as Figure 4 As shown, the light bulb-shaped electrodeless fluorescent lamp of this embodiment includes an induction coil 109 wound in divisions. The divided winding is to wind the lead wire 125 on the bobbin portion 104a to form the winding wire 103 of the induction coil 109, and to provide gaps around the periphery of the bobbin portion 104a between adjacent lead wires 125 and to wind again. As for the winding method of winding, in the present embodiment, the bobbin is divided into three in the central axis direction of the bobbin portion 104a and wound. Moreover, in their interstitial parts, such as Figure 5 As shown, there are two notches in the entire circumference of the bobbin portion 104a, and protrusions 208a, 208b, 208a, 208b protruding from the bobbin portion 104a are formed in a flange shape, and these protrusions 208a, 208b, 208a, 208b will be aligned Adjacent lead wires 103 are separated from each other and protrude toward the tube wall surface sid...

Embodiment approach 3

[0063] A bobbin 104 for a bulb-shaped electrodeless fluorescent lamp of this embodiment is shown in Figure 6 . Since the bulb-shaped electrodeless fluorescent lamp of this embodiment is the same as that of Embodiment 1 except for the protrusion 308 provided on the bobbin 104, the protrusion 308 will be mainly described.

[0064] In the bobbin portion 104a of the bobbin 104 for the light bulb-shaped electrodeless fluorescent lamp of this embodiment, the protrusion 308 is provided on the end opposite to the base portion 104b. The protrusion 308 is formed in a shape in which a disc is attached to the end of the bobbin shaft portion 104a. The disk is arranged coaxially with the bobbin portion 104a, and the diameter of the disk is larger than the diameter of the bobbin portion 104a. When the winding wire 103 of the induction coil 109 is installed on the winding shaft portion 104 a , the protrusion 308 protrudes toward the wall surface of the recessed portion 120 more than the wi...

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Abstract

Provided is a bulb-shaped electrodeless fluorescent lamp and a lighting device for an electrodeless fluorescent lamp with a longer life by suppressing blackening of a discharge container. A winding shaft (104a) of a bobbin (104), around which a winding (103) of an induction coil (109) is wound, is inserted into a recessed part (120) of an arc tube (101). The winding shaft (104a) has a plurality of projections (108, 108, ...), and these projections (108, 108, ...) project more toward the wall face of the recessed part (120) than the winding (103) of the induction coil (109). The winding (103) of the induction coil (109) is closer to the winding shaft (104a) than a virtual line connecting respective corners of the projections (108, 108, ...) that are adjacent to each other along the periphery of the winding shaft (104a).

Description

technical field [0001] The present invention relates to a bulb-shaped electrodeless fluorescent lamp and a lighting device for an electrodeless fluorescent lamp, and particularly to a bulb-shaped electrodeless fluorescent lamp and an electrodeless fluorescent lamp in which an induction coil wound on a winding shaft of a bobbin is inserted into a concave portion of a luminous tube lighting device. Background technique [0002] From the viewpoint of global environmental protection and economical efficiency, fluorescent lamps are being widely used because they are more efficient than incandescent lamps and have a longer life. In recent years, since electrodeless fluorescent lamps without electrodes have a lifespan several times longer than conventional fluorescent lamps with electrodes, they are attracting attention as economical light sources, and demand tends to increase. [0003] A bulb-shaped fluorescent lamp integrated with a fluorescent lamp and a lighting circuit is att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00H01J1/50H01J23/10H01J65/04
CPCH01J65/048
Inventor 仓地敏明板谷贤二
Owner PANASONIC CORP
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