JP2004103315A - Compact fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact fluorescent lamp which can obtain a prescribed brightness just after lighting, be used in flashing and meet the needs of the times that it should last longer than a light bulb and does not use mercury. <P>SOLUTION: The fluorescent lamp comprises a luminous tube 1 being a flat-type rare gas discharge lamp, in which, external electrodes composed of transparent conductive films are configured outside of double-sided plane glasses, phosphor films are formed on inner faces of the plane glasses, an inner space is formed by coating, melting and bonding adhesive layers over the whole circumference of the plane glasses being arranged with a space and a rare gas is sealed in the inner space. The luminous tube 1 is arranged in lamp external enclosure globes 2, 4 together with an electronic lighting circuit 3, and a base 5 integrally formed with the enclosure globes 2, 4 is made as a power supply input terminal. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a compact fluorescent lamp.
[0002]
[Prior art]
Conventionally, a large number of light bulbs have been used in various situations due to their features. However, light bulbs have a number of features, but have the disadvantages of low efficiency and short lifetime.
[0003]
Therefore, in recent years, general-purpose fluorescent lamps using mercury have been used as arc tubes, an electronic lighting circuit has been built in, and a lamp such as an Edison base has been installed. A fluorescent lamp has been proposed (for example, Japanese Utility Model Laid-Open No. 58-173163).
[0004]
As described above, since the bulb-type fluorescent lamp currently proposed uses mercury, it is advantageous in that the efficiency is high, and the same brightness as the bulb can be obtained with 1/3 to 1/4 the power of the bulb. I have.
[0005]
[Patent Document 1]
Japanese Utility Model Application Laid-Open No. 58-173163 (FIG. 1, pages 4 to 11)
[0006]
[Problems to be solved by the invention]
However, a problem with the bulb-type fluorescent lamp according to the prior art is that the emission characteristics change with temperature because mercury is used.
[0007]
The reason for this is that mercury amalgam is generally used in the arc tube to maximize brightness when the temperature of the arc tube is stable. This amalgam has the effect of maximizing brightness when the temperature is stable, but conversely immediately after the start of lighting, the vapor pressure of mercury is too low and becomes very dark, and after a while, it becomes bright, but this often poses a problem in practical use.
[0008]
On the other hand, a problem with the hot cathode fluorescent lamp according to the prior art is that if it is used blinking for a short period of time, its life is very short. In applications where a light bulb is used, blinking is often used, and this problem is also important.
[0009]
Further, a problem with the bulb-type fluorescent lamp is that it does not meet social needs because it uses harmful substance mercury.
[0010]
Therefore, an object of the present invention is to compensate for the above-mentioned drawbacks of the conventional bulb-type fluorescent lamp, to obtain a predetermined brightness immediately after lighting, to be able to use blinking, to have a longer life than a bulb, and to use no mercury. It is to provide a bulb-type fluorescent lamp that can meet the demands of the times.
[0011]
[Means for Solving the Problems]
The feature of the present invention is that an external electrode made of a transparent conductive film is formed outside the two flat glasses, a phosphor film is formed on the inner surfaces of the two glasses, and is arranged around the entire circumference of the two flat glasses arranged at intervals. An inner space is created by applying an adhesive layer, melting and bonding to form an inner space, and a rare gas discharge lamp formed by enclosing a rare gas in the inner space is used as an arc tube. It is located in a housing glove and is a light bulb shaped fluorescent lamp with a base as a power input end.
[0012]
Here, the transparent conductive film may be an ITO film. Further, the applied adhesive layer may be a frit seal glass paste. Further, the base may be an Edison type base. In addition, a spacer may be provided between the two flat glasses.
[0013]
Further, one arc tube may be provided in the lamp housing glove. Alternatively, a plurality of the arc tubes can be provided in the lamp housing glove.
[0014]
Further, it is preferable that the inside of the lamp housing glove is a vacuum. Preferably, the rare gas is xenon (Xe) gas or a mixed gas of xenon gas and another rare gas.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a bulb-type fluorescent lamp according to an embodiment of the present invention, and FIG. 2 is a diagram showing connections in a bulb-type fluorescent lamp according to an embodiment of the present invention. FIG. 2 is a side sectional view showing an arc tube in the bulb-type fluorescent lamp.
[0016]
First, referring to FIG. 3, the arc tube 1 of the present invention is a flat rare gas discharge lamp. In the arc tube 1 of the flat rare gas discharge lamp, external electrodes 12 and 12 made of a transparent conductive film made of ITO (Indium Tin Oxide) are formed on the outer surfaces of a pair of flat glass substrates 11 and 11, respectively. The phosphor films 13 are formed on the inner surface side, respectively.
[0017]
Then, an adhesive 14 of a frit seal glass paste having a thickness necessary to secure a predetermined discharge space over the entire periphery of the glass substrate is applied in a frame shape and sealed by heat treatment to form a discharge chamber 15.
[0018]
The discharge chamber 15 is sealed with a rare gas. That is, for example, xenon (Xe) gas or a mixed gas of xenon gas and another rare gas is sealed. However, in any case, since mercury (mercury vapor) is not used, the arc tube 1 is environmentally friendly.
[0019]
Next, a method for manufacturing the arc tube 1 will be described. A transparent conductive film 12 such as ITO is formed on the surface of the glass substrate 11 by a sputtering device or the like. A phosphor film 13 is formed on the opposite surface of the glass substrate 11 on which the transparent conductive film 12 is formed by a screen printing method or the like, and a phosphor film 13 is formed on the opposite surface of another glass substrate 12 on which the transparent conductive film 12 is formed. After forming a frame-like portion made of the frit seal glass paste 14 having a thickness that secures a necessary discharge chamber space 15 over the entire periphery of the phosphor film 13 and the glass peripheral portion by a screen printing method or the like, it is fired at a predetermined temperature. Form.
[0020]
After the above film formation, the substrates on both sides are arranged facing each other such that the transparent conductive film side is on the outer surface side and the phosphor film side is forming an internal discharge space, and evacuated in a vacuum chamber to a predetermined temperature. After reaching a predetermined degree of vacuum by degassing, a rare gas is introduced into the chamber, and at the same time, the frit seal glass portion is heated and melted at a predetermined temperature to bond the glass on both surfaces, thereby manufacturing an arc tube.
[0021]
The above method is a method of manufacturing an arc tube without using an exhaust pipe, but as another method, a small-diameter through-hole for exhaust is provided in an end portion of one glass substrate in a vertical direction, and After forming the spacers with the phosphor film and the frit seal glass described above and arranging the fired glass substrates facing each other, heating and bonding the glass substrates on both sides in advance to form a discharge glass container, and then using the exhaust device After exhausting and degassing with a vacuum pump through the small-diameter through-hole for exhaust and sealing the rare gas at a predetermined pressure, the small-diameter through-hole for exhaust heats the frit glass with a metal cap from the outside. By doing so, it can also be manufactured by a method of sealing with a glass substrate to form a vacuum container.
[0022]
Next, referring to FIG. 1, the above-described arc tube 1 of the present invention is provided inside a lamp outer housing glove main body 2 made of glass or plastic by being held by an arc tube holding component 6, and an electronic lighting circuit is provided. 3 is provided inside the main body 4. A lamp external housing glove is constituted by the lamp external housing glove main body 2 and the main body 4, and an Edison-type base 5 is attached integrally with the main body 4. The interior of the lamp outer casing glove is evacuated to prevent, for example, oxidation of the external electrodes.
[0023]
Next, referring to FIG. 2, a voltage of, for example, ac 100 V is input to the electronic lighting circuit 3 from the outside through the base 5, and a voltage of, for example, dc 12 V is output from the circuit 3. UV light having a wavelength of, for example, 351 nm is emitted from the arc tube 1 by being applied to the external electrode. That is, the flat rare gas discharge lamp manufactured as described above is applied to the discharge chamber by applying a voltage between the external transparent electrodes. A discharge is generated to excite the rare gas, and light emission whose main wavelength is in the ultraviolet region is generated.The ultraviolet light is converted to a predetermined wavelength by the phosphor applied to the discharge chambers of both substrates, and the converted light emission is converted. Can be taken out from both sides.
FIG. 4 is a side sectional view showing an arc tube in a light bulb-type fluorescent lamp according to another embodiment of the present invention. In FIG. 4, the same or similar portions as those in FIG. 3 are denoted by the same reference numerals, and the duplicate description is omitted.
[0024]
In FIG. 4, a spacer 16 is provided between the two glass substrates. Therefore, although the number of parts increases accordingly, it can be used to secure a more correct interval between both glass substrates.
[0025]
FIG. 5 is a configuration diagram showing a bulb-type fluorescent lamp according to another embodiment of the present invention. In FIG. 5, the same or similar portions as those in FIG.
[0026]
In FIG. 5, a plurality of (three in the figure) arc tubes 1 are provided in the same lamp outer casing glove. In the case where a single light emitting tube is not enough in view of the irradiation area, intensity, and the like, and a plurality of light emitting tubes are required, the light-bulb-type fluorescent lamp of such an embodiment can be provided.
[0027]
The flat type rare gas discharge lamp of the present invention described above can be lit instantaneously by using it in combination with an appropriate electronic lighting circuit, and the luminous characteristics have no temperature characteristics and the brightness changes in various temperature environments. In addition, almost 100% brightness can be obtained even immediately after lighting.
[0028]
In addition, the bulb-type fluorescent lamp of the present invention uses the above-mentioned flat type rare gas discharge lamp as an arc tube, and uses one or a plurality of lamps in a lamp outer casing glove made of glass or plastic to form an arc tube accommodating portion. Then, an electric wire for supplying electric power to both external electrodes of the arc tube is connected to the output side of the electronic lighting circuit. The electronic lighting circuit is disposed inside a main body having a base, and a power-supply-side input of the electronic lighting circuit is supplied through the base, and is separated from the arc tube accommodating section to form a bulb-type fluorescent lamp.
[0029]
【The invention's effect】
As described above, the compact fluorescent lamp of the present invention has the following effects.
[0030]
The first effect is that since the emission characteristics of the arc tube do not depend on the ambient temperature, almost 100% brightness can be obtained immediately after lighting, and the brightness becomes almost the same when the ambient temperature is higher than the low temperature.
[0031]
The second effect is that a high rare gas filling pressure can be adopted for the inner electrode type flat rare gas discharge lamp, and thereby a highly efficient and stable external facing discharge can be realized. The reason is that the discharge characteristics are a dielectric barrier discharge between the external transparent electrodes of the double-sided glass, and the characteristics of the flat glass as the dielectric layer vary with the dielectric layer made of the low melting point glass used for the internal electrode type. This is because a stable dielectric layer having a small number of layers is obtained.
[0032]
The third effect is that this bulb-type fluorescent lamp is extremely cold as the bulb-type fluorescent lamp using the conventional fluorescent lamp of the hot-cathode type as the luminous tube, even if the luminous tube is basically used as a cold-cathode type flashing lamp. It is not short-lived and is ideal for places where it is used blinking. That is, even in applications where the lamp is brighter and blinks more frequently than immediately after lighting, as compared with the conventional fluorescent lamp using a fluorescent lamp as a light emitting tube, the life time is not reduced, and the life is longer than that of a light bulb.
[0033]
The fourth effect is that since mercury (mercury vapor) is not used, a product that is friendly to the global environment and that is described according to social needs can be obtained.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a bulb-type fluorescent lamp according to an embodiment of the present invention.
FIG. 2 is a diagram showing connections in a bulb-type fluorescent lamp according to an embodiment of the present invention.
FIG. 3 is a side sectional view showing an arc tube in the light bulb-type fluorescent lamp according to the embodiment of the present invention.
FIG. 4 is a side sectional view showing an arc tube in a light bulb-type fluorescent lamp according to another embodiment of the present invention.
FIG. 5 is a configuration diagram showing a bulb-type fluorescent lamp according to another embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 arc tube 2 outer casing glove body 3 electronic lighting circuit 4 body portion 5 base 6 arc tube holding component 11 glass substrate 12 external electrode 13 made of transparent conductive film 13 phosphor film 14 adhesive made of frit glass 15 discharge chamber (rare gas)
16 Spacer

Claims (9)

An external electrode made of a transparent conductive film is formed outside the two flat glasses, a phosphor film is formed on the inner surfaces of the two glasses, and adhered by an adhesive layer over the entire periphery of the two flat glasses arranged at an interval. An internal space is created, a flat rare gas discharge lamp configured by enclosing a rare gas in the internal space is used as an arc tube, and the arc tube is arranged together with an electronic lighting circuit in a lamp outer housing glove, and a base is powered by a power source. A bulb-type fluorescent lamp characterized as an input end. The fluorescent lamp according to claim 1, wherein the transparent conductive film is an ITO film. The fluorescent lamp according to claim 1, wherein the adhesive layer is a layer formed using a frit seal glass paste. The bulb-type fluorescent lamp according to claim 1, wherein the base is an Edison-type base. The bulb-type fluorescent lamp according to claim 1, wherein a spacer is provided between the two flat glasses. The bulb-shaped fluorescent lamp according to claim 1, wherein one arc tube is provided in the lamp housing glove. The bulb-type fluorescent lamp according to claim 1, wherein a plurality of the arc tubes are provided in the lamp housing glove. The bulb-type fluorescent lamp according to claim 1, wherein the inside of the lamp housing glove is a vacuum. 2. The compact fluorescent lamp according to claim 1, wherein the rare gas is xenon (Xe) gas or a mixed gas of xenon gas and another rare gas.

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