Electrodeless fluorescent lamp
A technology of electrodeless and fluorescent lamps, which is applied to parts of fluorescent lamps, discharge lamps, and gas discharge lamps, etc., and can solve the problems of not being able to output light efficiently, not being able to replace light bulbs, and reducing light distribution.
Inactive Publication Date: 2004-12-08
PANASONIC CORP
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Problems solved by technology
Therefore, even if a conventional bulb-shaped electrodeless fluorescent lamp is installed in a lighting fixture that is becoming popular, it cannot output light efficiently because the light distribution characteristic of the bulb-shaped electrodeless fluorescent lamp is different from that of a bulb.
Even in aspects other than efficiency, for example, if the light bulb-shaped electrodeless fluorescent lamp is installed on a lighting fixture near the ceiling and used as a downlight, it will be more emphasized. Figure 5 The light distribution directly below tends to be lower, and as a result, the front end of the lamp looks darker than its surroundings, which is not good.
[0020] It is also considered to control the light distribution characteristics by coating light-absorbing substances on the parts with high light distribution on the outside of the lamp. However, since the total luminous flux decreases, the efficiency will deteriorate, which is not practical.
[0021] Moreover, the electrodeless fluorescent lamp shown in the aforementioned publication is not in the shape of a light bulb and cannot be used as a substitute for a light bulb because of its different shapes.
Method used
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Embodiment Construction
[0043] Embodiments of the present invention will be described with reference to the drawings.
[0044] The electrodeless fluorescent lamp of this embodiment includes: figure 1 As shown, when viewed from the outside, the discharge vessel 11 with the phosphor film 16 ′ formed on the inner wall, the case 19 installed on the discharge vessel 11, and the lamp cap 18 installed on the opposite side of the discharge vessel 11 of the case 19 . The discharge vessel 11 is composed of an outer tube 31 and an inner tube 32 defining the recess 12 . The outer tube 31 is pot-shaped or pear-shaped, and is composed of a substantially spherical main body 35 and a head 36 protruding from the main body 35 with a tapered diameter.
[0045] exist figure 2 Shown in detail as a schematic cross-sectional view, in the electrodeless fluorescent lamp of this embodiment, a coil 13 wound on a magnetic core 14 is disposed on the concave portion 12, and the coil 13 is connected to a lighting circuit 17 h...
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An electrodeless fluorescent lamp, wherein the film thickness of a fluorescent body film 16' formed on the inner surface of a translucent discharge container 11 having a recessed part 12 for sealing light emitting substance is maximum near plasma 15, reduced toward the connection part 21 thereof with an inner tube 32, and reduced toward a round bottom part 41, whereby, by the film thickness distribution, a light distribution generally equal to that of a lamp bulb can be realized, and an excellent retrieval of light can be realized also when the electrodeless fluorescent lamp is installed in a lighting fitting for the lamp bulb.
Description
technical field [0001] The present invention relates to an electrodeless fluorescent lamp, in particular to an electrodeless fluorescent lamp in which a coil is arranged in a concave portion of a discharge vessel. Background technique [0002] In recent years, due to the problem of global warming or the problem of efficient use of energy resources, efforts have been made in all fields to reduce energy consumption. Even in the field of lighting, fluorescent lamps with better expansion efficiency have been popularized starting from conventional light bulbs. [0003] However, in order to replace the light bulb with the fluorescent lamp, there is a problem that it is necessary to replace the low-priced lighting fixture for the light bulb with an expensive lighting fixture incorporating a stabilizer for lighting the fluorescent lamp. [0004] In order to solve this problem, a bulb that can be directly connected to a bulb socket of a lighting fixture for a bulb to be directly lit...
Claims
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IPC IPC(8): H01J61/35H01J61/42H01J61/44H01J65/04
CPCH01J61/42H01J61/44H01J61/35H01J65/048
Inventor 大久保和明
Owner PANASONIC CORP