JPS60109160A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To prevent the generation of irregular flickering by suppressing the toxication of the electrode by specifying the distance between the free end of lead-in wires and the location where the leg of a filament coil is fixed. CONSTITUTION:Each lead-in wire 4 has a section 9 with a large diameter, which is located apart from the end 5 of the lead-in wire 4 by a distance (h) of at least 5mm.. The legs 10 of a filament coil 6 are fused to the sections 9 by spot welding. Because of the above constitution, during the anodic cycle of the electrode, electrons do not flow into the filament coil 6 and most of them flow into areas of the lead-in wires 4 located between the center of the axis of the legs 10 and the end 5 of the lead-in wires 4. Accordingly it is possible to protect the filament coil 6 from electronic impact. Furthermore, it is possible to prevent an impure gas such as carbon dioxide gas from developing from an electron-discharging substance applied to the filament coil 6, thereby suppressing the toxication of the entire electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent lamp, and more particularly to an electrode structure for a fluorescent lamp that improves the irregular flickering that occurs at the center of the lamp when the fluorescent lamp is operated with full current variation.

[Prior art]

In general, fluorescent lamps are made of pulp 1, as shown in Figure 1.
The inner surface of the pulp 1 is coated with the phosphor 2, both ends of the pulp 1 are attached to the stem 3, two lead-in wires 4' are planted in the stem 3, and the tips 5 of the lead-in wires 4 are attached. The crushed portion is bent into a hook shape, and the filament coil 6 is crimped and fixed at this bent portion, and the filament coil 6 is
Electron radiation! l'a quality (not shown) f #l+J to fully form the electrodes, and the caps 8 that shoulder the two cap bottles 7 are fully attached to both ends of the pulp 10, and the pulp 1 is entirely composed of mercury and argon. It was composed of a rare gas sealed in it.

In such conventional fluorescent lamps, the inner diameter of the tube was reduced to 32 points or less in order to completely suppress the lamp current and reduce ballast loss in order to increase the total light output and completely reduce the power consumption during lighting. Slim fluorescent lamps have been put into practical use. Reducing the inner diameter of the tube to 32 mm or less in this manner has the advantage that the cost of materials such as pulp, phosphor, packaging material, etc. can be saved, and the distribution cost can also be reduced.

However, in conventional fluorescent lamps with a total inner diameter of 32 mm or less, irregular flickering occurs in the center of the lamp as the lighting time elapses when the lamp point disappears.
The drawback was that it felt very uncomfortable. In general, when a fluorescent lamp (IL) is turned on, there are regular flickers near the poles of the lamp that occur regularly in response to the power frequency, and irregular flickers in the center of the lamp that do not correspond to the power frequency. There is a flicker that occurs at ).

FIG. 2 is a graph showing the relationship between the tube inner diameter and the irregular flicker occurrence rate after 500 hours of lighting time. As is clear from this figure, the incidence of irregular flickering increases as the total tube inner diameter is increased to 1, and the incidence of irregular flickering increases as the tube inner diameter increases to 32I+III.
It can be seen that there is a rapid increase below +.

FIG. 3 is an oscilloscope observation of the f/f voltage waveform and the light output waveform at the center of the rung of a fluorescent lamp in which the above-described random flickering occurred.

As is clear from this figure, irregular flickering occurs when the anode oscillation of the lamp voltage repeatedly occurs and disappears irregularly, causing the lamp current to fluctuate and the light output to fluctuate accordingly. This irregular variation in light output is felt by the eyes as an unpleasant flicker.

It has been confirmed that the cause of such irregular flickering is the irregular occurrence and disappearance of anode oscillations in the lamp voltage waveform. In fluorescent lamps, because the lamp current is suppressed,
As the lamp voltage increases, the difference between the restriking voltage and the voltage fj becomes smaller, making the discharge unstable, and the anode oscillation of the lamp voltage waveform tends to disappear. In fluorescent lamps with tube inner diameters narrowed to 32 cm or less, rare gases with an atomic weight of 1, such as kligton and xenon, are used to suppress the rise in lamp voltage.
71 & I think there is a way to lower the lamp voltage, but if rare gases such as krypton or xenon are mixed in, it becomes difficult to start at low temperatures, the brightness cannot be obtained in terms of light, and the lamp current This increases the ballast loss, making it difficult to reduce power consumption and reduce power consumption. The overall purpose of the present invention is to provide a lamp with a tube inner diameter 'fj: If111, which reduces power consumption during lighting, does not impair lamp characteristics at low temperatures, and solves irregular flickering during lighting. do. In other words, this invention
This solution solves the irregular flickering of fluorescent lamps with tube inner diameters of 32 mm or less, which are filled with a rare gas mainly composed of alkones.

As a result of thorough research into whether or not the irregular occurrence and disappearance of anode vibrations, which cause irregular flickering, occurred, the inventor, Hiro, discovered that the electrodes were poisoned while the fluorescent lamp was on. The reason for this was revealed by Kim.

In particular, in fluorescent lamps with a tube inner diameter of 320 mm or less, vibrations disappear immediately, and even a slight contact with the electrode causes anode vibration, which tends to repeat itself and cause irregular flickering.

In other words, when a fluorescent lamp is turned on, a pair of 1 (one side of the L pole has both a cathode function and an anode function,
Due to the electron impact during the anode cycle, the temperature of the entire filament coil rises abnormally, and the heat generated at this time releases impurity gases such as carbon dioxide, electron emitting substances, and carbon dioxide. This phenomenon is especially noticeable if the electron-emitting substance is not sufficiently decomposed and activated in the thermal decomposition process that goes into the exhaust process.1 Impure gases such as LIJ acid gas generated at this time are decomposed, and CO2, ( The reaction Co) → C+ 02 (0) occurs, and carbon adheres to the filament surface and lead-in wire, and the entire electrode is poisoned, reducing the function of the Jt1 electrode as an anode and causing the anode vibration to disappear. There is. In addition, even if the electrode picked up by impure gas functions as a cathode in this way, it will be poisoned and its electron emission ability is not that of light, so it is necessary to use ion bombardment to increase the electron emission ability. This results in the full expansion of the entire electrode. A fluorescent lamp having such a poisoned electrode will have a shortened lifespan since it will be difficult to obtain an appropriate electron emission ability.

The inventors have proposed an electronic impulse g to assist the anode cycle of such an electrode.
A. As a method for total relaxation, we first investigated various materials that make up the ili electrode, namely the filament, IU, the radiation substance, and the lead-in wire, and investigated whether it is possible to suppress the poisoning of the electrode.

However, the filament, 'ilI electron emitter/+
Ij.

Poisoning of the electrodes could not be suppressed no matter what factors such as lead-in wires were taken, and it was difficult to solve the problem of irregular flickering in fluorescent lamps with tube inner diameters of 32 mm or less.

For example, the filament resistance is determined by the lamp current, cathode preheating current, etc., but the electronic shock 51 can be alleviated by increasing the +W diameter and metal-finishing the filament resistance. However, this method causes problems such as a decrease in brightness due to a decrease in lamp current and a cathode preheating current that does not meet the JIS range, which ultimately has a negative impact on the lamp characteristics.
It was found that it is difficult to suppress electrode poisoning without giving

In addition, if the amount of electron emitting material is reduced in order to reduce the release of impurity gas from the electron emitting material due to electron impact,
When the electron emitting material in the exhaust process was completely thermally decomposed, an excessive amount of IW was generated, and the proper electron emission ability was not achieved, resulting in an extremely shortened life.

Furthermore, the lead-in wire is usually made of nickel or gold-84 wire such as nickel-plated iron, but by increasing the wire diameter, the total heat response of the lead-in wire is The temperature of the filament is suppressed even under extreme stress.
We investigated whether it is possible to suppress the release of impurities]. However, when thermally decomposing the electron emitting material in the exhaust process, it was found that if the leg of the filament (VJ) is heated by the lead wire. As the body temperature decreases, the temperature difference between the center and legs becomes very large. This increase in temperature difference increases the non-uniformity of thermal decomposition and activation of the electron-emitting material, and the electron-emitting material no longer has appropriate electron-emitting ability over the entire area where it is applied, resulting in an extremely shortened lifespan. Becomes shorter.

[Summary of the invention]

As a result of further investigation based on the above analysis results, the inventor Hiromu found that 'lII, pole'< i of the anode cycle 113.
li, distance 1 from the tip of the lead-in wire to protect it from child impact.
By optimizing the distance 11 and the wire diameter d of the lead-in wire for melting and fixing the filament coil, the entire electronic filament can be welded at the part ζ1111. It has been found that by pouring it into the entire portion of the lead-in wire on the discharge path side from the leg of the coil, the exposure of the '71j pole to 1j'jf can be suppressed and the occurrence of irregular flickering can be completely prevented.

That is, in the present invention, a filament leg is welded firmly to a part of the tube having an inner diameter of 32 mm or less and the distance from the tip of the lead-in wire is 5 mm or more, and the introduction at fLl-min. Thin t of the unwelded part of the wire diameter (+01.2 times ~ 2
By specifying it as 0 times, the electrode is not affected when the firefly is turned on, and the anode vibration is generated completely stably.
To provide a fluorescent lamp that eliminates irregular flickering.

1] Embodiments of the Invention Hereinafter, the fluorescent lamp of the present invention will be described in more detail with reference to preferred embodiments qf9 shown in the accompanying drawings.

FIG. 4 shows a fluorescent lamp according to one embodiment of the present invention. In FIG. 4 showing this embodiment, the same or corresponding parts as those of the fluorescent lamp shown in FIG. In the fluorescent lamp according to this embodiment, a large diameter portion 9 having a wire diameter of d is formed in the lead-in wire 4 thereof. This portion 9 is formed at a distance II of 5 or more from the tip Mfii (riI5) of the lead-in wire 4, and the leg portion 10 of the filament coil 6 is welded to this portion 9. ,
The glaze center 11 of the leg portion 10 of the filament coil 6 is located at a distance of 5 or more from the tip 5 of the lead-in wire 4.

In this way, the filament coil 6 is connected from the tip 5 of the lead-in wire 4 to the +llI
+ Width so that the distance l#lh to center 11 is 5 lines or more,
Since the lead-in wire 4 is spot-welded at the portion 9 where the wire diameter is d□, electrons do not flow to the filament coil 6 when the electrode is in an anodic cycle, and most of the electrons are transferred to the axis of the leg of the filament coil of the lead-in wire 4. The filament coil 6 k 'Iir flows from the center 11 to the discharge path side and into the part 91A1 section 5 stop.

It is possible to prevent the electron emitting material coated on the filament coil 6 from generating impure gases such as carbon dioxide, and to suppress poisoning of the entire electrode. Therefore, even during the cathode cycle, the appropriate S, J? Full electron emission can be performed at the initial temperature, constant vibration of the anode is generated, stable discharge is activated, and unpleasant irregular flickering can be suppressed.

Next, the present inventor's bulb consists of an annular 30 watt fluorescent lamp with the conventional electrode structure shown in FIG. 1 and a gold molded electrode structure of the present invention shown in FIG. Distance from the tip 5 of the lead-in wire 4 of the nickel-plated iron wire to the axial center 11 of the leg of the filament coil h f: 10 tt
bv, and a ring-shaped 30 wand fluorescent lamp with a wire diameter of 1.0 mm at the lead-in wire portion 9 to which 6 filament coils are welded. When we observed the occurrence of this, we found the results shown in Figure 5.

As is clear from Fig. 5, the lighting time of the conventional product is 2.
After 00 hours, irregular flickering occurred at 11.'L.
Since then, the incidence has continued to rise. On the other hand, in the fluorescent lamp of the present invention, although irregular flickering is observed for the first time after 2000 hours, the occurrence rate is low, and the occurrence rate thereafter is also extremely low. As a result, according to the present invention, the filament coil 6 is arranged so that the distance from the tip 5 of the lead-in wire to the axial center 11 of the leg 10 of the wire/l/co/r is 5 or more. , the diameter of the lead-in wire 40 is d; 1. By spot welding at 1 to 9, it is possible to completely suppress the poisoning of the electrodes in the area and suppress the occurrence of irregular flickering. I can do it.

Furthermore, as a result of various studies regarding the distance from the filament axis center 11 to the tip of the lead-in wire for annular 30 watt fluorescent lamps, the author has found the results shown in Table 1. I was rejected.

In addition, in Table 1, the lead-in wire is nickel-plated iron I%! using JJ1. after 2000 hours of lighting. It shows the regular flicker occurrence rate.

As is clear from Table 1, when the length of h is 51+Im or more, the occurrence of irregular flickering is extremely reduced. However, if the length of h is 20 or more, although it is effective in suppressing the occurrence of irregular flickering, the light emitting area of the solar column becomes smaller and the brightness decreases, which is undesirable.

In addition, it was confirmed that similar results were obtained with fluorescent lamps other than the ring-shaped 30-socket type. Also, the wire diameter dl of the lead-in wire in the part where the filament coil is fully welded is 1.2 to 2.0 times the wire diameter of the lead-in wire in the unwelded part > i4 L, the reason is 1.2 times. If it is less than that, the heat capacity of the lead wire at the part where the filament is fully welded will be low, and the spot temperature will be abnormally high.Even if the total length of h is 5 or more, it will not be possible to protect the entire electrode from poisoning. Yes, if it exceeds 2.0 times, the spot temperature will decrease,
This is because the lifespan becomes extremely short.

〔Effect of the invention〕

As mentioned above, according to this document, in a fluorescent lamp with a tube inner diameter of 32 mm or less, the distance from the tip of the lead-in wire to the axial center of the filament coil is 5 mm or more, 4: Weld the filament coil tS to the incoming wire, and the wire diameter d of the incoming wire at that part.

1.2 to 2 times the wire diameter of the lead-in wire in the part that is not completely welded.
By setting it to 0 times, the poisoning of the electrode is suppressed and the anode vibration is reduced.
It is possible to use a fluorescent lamp that generates a stable discharge without irregular flickering.

4゜ A brief explanation of the drawings. Figure 1 shows a broken 1f Ji-sou diagram of the main parts of a conventional fluorescent lamp, and Figure 2 shows the relationship between the tube inner diameter and the incidence of irregular flickering after 500 hours of lighting. Fig. 1, Fig. 3 (t), Diagram showing the 1° waveform of a fluorescent lamp with irregular flickering and the light output waveform at the center of the tube, Fig. 21, Fig. 3, 1, One implementation of the present invention. Main part fracture correct i101%l showing example, 5th
The figure is a diagram showing a comparison of the lighting time and the incidence of irregular flickering between a conventional product and a product of the present invention.

1... Pulp, 2... Fluorescent material, 3... Stem, 4
Lead-in wire, 5... Tip part, 6... Filament coil, 7... Cap bottle, 8... Cap, 9... Welded part between lead-in wire and filament coil leg, 10... Niira. Legs of Mentocoil, 11... Axis center of legs.

In addition, the same reference numerals in the figure are the same parts, and C to Osho 11 [X minutes and months.

Agent Masuo Oiwa tI″, 11′?l No. 21゛4 The talent inside the buds rnrnnn Figure 3

Claims (3)

[Claims] (1) In a fluorescent lamp with a tube inner diameter of 32 mm or less, in which a filament coil is stretched between two lead-in wires at both ends, the filament coil is placed in a portion where the distance l1li:' from the tip of the lead-in wire is 5 mm or more. A fluorescent lamp whose main feature is that the legs are fixed by bath-bonding. (2) In the fluorescent lamp 1 according to claim 1, the wire diameter of the lead-in wire of the portion welded to the IJ'l1 portion of the filament coil is 1 of the wire diameter of the unwelded portion of the lead-in wire. .2 to 2.0 times. (3) A fluorescent lamp according to claim 1, characterized in that the distance from the lead-in wire tip to the fisiment leg B15 is 5 to 20 points.