JPH0195494A - Illumination device - Google Patents

Abstract

PURPOSE:To obtain a illumination device with efficient illumination by providing a vessel where a fluorescent material is applied and one or more kind of metal and rare gas is sealed and an electromagnetic field generation means comprising a conductor including a superconducting member applying a high frequency electronic field to the inside of this vessel. CONSTITUTION:There is no internal resistance as a coil 1b is composed of a superconducting member. When a power switch 1a is put ON and a high frequency voltage is applied to the coil 1b by a high frequency power supply 1c, the high frequency current flows to produce high frequency electromagnetic field, making rare gas sealed in a fluorescent lamp 2 start discharge. The discharge of the gas 2a vaporizes granular mercury 2b in the lamp 2 to perform discharge, mainly by mercury vapor. Then mercury vapor generates much ultraviolet light beams as well as green light beams, and the ultraviolet beams are converted into a visible light by means of phosphor material 2c applied on a tube wall to allow a fluorescent lamp 2 to illuminate. Electrical resistance is turned to be zero by composing the coil 1b of the superconducting material in this way. It is thus possible to eliminate heat generation and heat loss, and to improve the efficiency of electromagnetic field, namely illumination efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lighting device that emits light using a high frequency electromagnetic field.

BACKGROUND OF THE INVENTION Conventional fluorescent lamps have filaments at two locations in a container filled with rare gas and mercury, and are lit by applying an alternating current voltage between the two filaments. However, according to the above configuration, there is a problem that the service life is short due to consumption of the filament.

In order to solve this problem, the following techniques have been devised.

FIG. 4 is a schematic configuration diagram showing a lighting device that solves the conventional problems. In FIG. 4, 31 is an electromagnetic field generating means;
31a is a power switch for the electromagnetic field generating means, and 32 is a fluorescent lamp. FIG. 5 is a circuit diagram showing an equivalent circuit of the electromagnetic field generating means 31. In FIG. 5, the same components as those in FIG. 4 are designated by the same reference numerals, and their explanation will be omitted. 31b is a high frequency power supply, 31C is a coil that applies a high frequency electromagnetic field to the fluorescent lamp 32, and R is an internal resistance of the coil 31c.

The operation of the lighting device will be explained below using FIGS. 4 and 5. First, turn on the power switch 31a, and turn on the high frequency type 83.
When a high frequency voltage is applied to the coil 31c by lb, a high frequency current flows through the coil 31c and a high frequency electromagnetic field is generated. The generated high-frequency electromagnetic field causes the rare gas sealed in the fluorescent lamp 32 to start discharging. The mercury in the fluorescent lamp 32 evaporates due to the rare gas discharge, and a discharge mainly caused by mercury vapor is performed. This discharge produces a large amount of green light and ultraviolet rays due to the mercury vapor, and the ultraviolet rays are converted into visible light by the fluorescent material coated on the tube wall, causing the fluorescent lamp 32 to emit light.

According to the configuration described above, the life of the fluorescent lamp is about 3 to 5 times longer than that of a conventional fluorescent lamp with a filament, and the lifespan of the fluorescent lamp is about 3 to 5 times longer, and the time of closing from power-on to lighting is short.

Problems to be Solved by the Invention However, according to the above configuration, there is a resistor RL in the coil of the electromagnetic field generating means for generating the high frequency electromagnetic field.

Resistance RL is proportional to the length of the conductor and inversely proportional to its cross-sectional area.

For example, diameter 0. In the case of a coil made of 1 km of 5 mm copper wire, the resistance of the coil is approximately 90 ohms, and if a current of IA is passed through the coil, heat of approximately 21° 6 J is generated per second. The loss due to this heat generation deteriorates the effectiveness of generating an electromagnetic field. That is, there was a problem that the luminous efficiency deteriorated. - The present invention has been made in view of the above-mentioned problems, and aims to provide an electromagnetic field generating means with no heat loss and high efficiency in generating an electromagnetic field, and a lighting device with high luminous efficiency.

Means for Solving the Problems In order to achieve the above object, the present invention provides a container at least partially coated with a fluorescent substance and filled with one or more metals and a rare gas, and a high-frequency electromagnetic device inside the container. The electromagnetic field generating means includes an electromagnetic field generating means made of a conductor including a superconducting member that applies a field.

Effect of the Invention The present invention uses the electromagnetic field generating means made of a conductor including a superconducting member to provide an electromagnetic field generating means that has no heat loss and has high electromagnetic field generation efficiency, and provides a lighting device with high luminous efficiency. can be obtained.

Embodiment FIG. 1 is a schematic diagram of a lighting device showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an electromagnetic field generating means for generating a high frequency electromagnetic field, and its exterior is made of a material that does not transmit high frequency electromagnetic waves.

la is a power switch for the electromagnetic field generating means, and 2 is a fluorescent lamp. FIG. 2 is a circuit diagram showing an equivalent circuit of the electromagnetic field generating means l. In FIG. 2, the same components as in FIG. 1 are designated by the same reference numerals and their explanations will be omitted.

1b is a coil made of superconducting material, lc is coil lb
This is a high-frequency power supply that applies a high-frequency voltage to the

Here, since the coil 1b is made of a superconducting member, there is no internal resistance. Note that the superconducting member is, for example, 5rBa
YCutOe-, Y-=Ba-Cu-0, Er-Ba=
Cu-() or the like may be used.

FIG. 3 is a sectional view showing the structure of the fluorescent lamp 2. As shown in FIG.

In FIG. 3, 2a is a rare gas such as argon gas, 2b is mercury, and 2C is a fluorescent substance.

The operation of the lighting device in this embodiment will be explained below with reference to FIGS. 1, 2, and 3. When the power switch la is turned on and a high frequency voltage is applied to the coil lb by the high frequency power supply 1c, a high frequency current flows and a high frequency electromagnetic field is generated. The rare gas 2a sealed in the fluorescent lamp 2 by this high frequency electromagnetic field
begins to discharge.

Due to the discharge of the rare gas 2a, the particulate mercury 2b in the fluorescent lamp 2 evaporates, and a discharge mainly caused by mercury vapor is performed. During this discharge, a large amount of green light and ultraviolet rays are generated by the mercury vapor, and the ultraviolet rays are converted into visible light by the fluorescent material 2c applied to the tube wall, causing the fluorescent lamp 2 to emit light.

In this embodiment, a tubular fluorescent lamp is used, but the fluorescent lamp may have any shape. Further, in this embodiment, the metal sealed in the fluorescent lamp was mercury, but any metal that exhibits the same effect may be used.

As described above, by configuring the coil of the electromagnetic field generating means from a superconducting member, the electrical resistance becomes zero, so the coil does not generate heat and heat loss becomes zero, improving the electromagnetic W generation efficiency, that is, the luminous efficiency. Furthermore, since there is no heat loss in the coil and the efficiency of electromagnetic field generation is improved, the high frequency power supply required to obtain the same electromagnetic field strength as the conventional one can be configured to be smaller than the conventional one.

As described in detail, according to the present invention, the loss of heat due to heat generated by the electromagnetic field generating means is reduced to zero, and the electromagnetic field generating efficiency of the electromagnetic field generating means, that is, the luminous efficiency is improved, so that it is extremely effective in practice. be.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a lighting device showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an equivalent circuit of the electromagnetic field generating means of the same device, and Fig. 3 is a diagram showing the configuration of a fluorescent lamp of the same device. 4 is a schematic configuration diagram showing a conventional illumination device, and FIG. 5 is a circuit diagram showing an equivalent circuit of an electromagnetic field generating means of the same device. 1... Electromagnetic field generating means, 2... Fluorescent lamp. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A container having at least a portion coated with a fluorescent substance and filled with one or more metals and a rare gas, and an electromagnetic field generating means made of a conductor including a superconducting member that applies a high frequency electromagnetic field to the container. A lighting device characterized by: