KR101288786B1 - Method for widening electrode sections of external electrode fluorescent lamp - Google Patents

Abstract

According to one embodiment of the present invention, a method for expanding an electrode portion of an external electrode fluorescent lamp is provided. The method includes the steps of: (a) providing a glass tube body of a first diameter with both ends open; (b) adjacent to one end of the both ends, and melting near both edges of the first glass tube section in which the external electrode is to be formed, adjacent to the first ring glass tube section of a second diameter larger than the glass tube and the one end. Forming a second ring glass tube section; (c) melting the glass tube of the first diameter between the first ring glass tube section and the second ring glass tube section with a torch, expanding the tube to the same diameter as the first and second ring glass tube sections of the second diameter, and Forming a first electrode portion of the; (d) performing the steps of (b) and (c) with respect to the other end of the both ends to form an expanded second electrode part.

Description

Electrode expansion method of external electrode fluorescent lamp {METHOD FOR WIDENING ELECTRODE SECTIONS OF EXTERNAL ELECTRODE FLUORESCENT LAMP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an external electrode fluorescent lamp, and more particularly, to a method of expanding the diameter of an electrode portion to be an electrode portion of an external electrode fluorescent lamp.

A liquid crystal display is a light emitting flat panel display that itself emits light and does not form an image, and is a light receiving flat panel display that receives light from the outside to form an image, thereby observing an image in a dark place. There is a problem that cannot be done.

In connection with the above problem, a backlight is provided on the back of the liquid crystal display to irradiate light so that the image can be viewed even in a dark place. Typical specifications required for the backlight include high brightness, high efficiency, uniformity of brightness, long life, thinness, low weight, and low cost.

Conventionally, Cold Cathode Fluorescent Lamps (CCFLs) are frequently used as the backlights, but they are operated at high brightness and lifespan of lamps is pointed out as a problem. In this regard, in recent years, an external electrode fluorescent lamp has been widely used as a backlight.

The external electrode fluorescent lamp encapsulates gas in a sealed glass tube and forms electrodes on both ends of the lamp to perform gas discharge operation without exposing the electrode to the gas discharge space, thereby forming plasma in the lamp by the electric field of the external electrode. It is a fluorescent lamp having a structure. The gas discharge phenomenon inside the tube is the same as that of a normal lamp, but since the glass tube itself acts as a dielectric, the wall gain due to the accumulation of space charges caused by the discharge is added to the external voltage applied to induce the discharge. This will occur.

Unlike ordinary fluorescent lamps such as cold-cathode fluorescent lamps, external electrode fluorescent lamps have electrodes outside the lamp and do not generate heat by using an electron emission method by an electric field, and their lamp life is more than five times longer than ordinary fluorescent lamps. It is about 10 times brighter and next generation lighting lamp with more than 5 times energy efficiency compared to cold cathode fluorescent lamps. In addition, the external electrode fluorescent lamp has a number of advantages, such as being able to drive a plurality of tubes by different driving devices, and is widely used in applications requiring high brightness, such as LCD TVs and billboards.

On the other hand, the tube diameter of the lamp is related to the luminance and the light quantity. The smaller the diameter is, the higher the luminance is but the smaller the light emitting area of the fluorescent lamp is, the smaller the light quantity is. On the other hand, the larger the diameter, the smaller the luminance, but the light emitting area is increased, so that it is applied to a lamp for high power having a large amount of light. Particularly, external electrode fluorescent lamps generally use small tubes having small diameters to obtain high luminance, but the amount of light is small, and the luminance decreases when the diameters are increased to compensate for them.

In addition, as the length and diameter of the entire lamp become larger, the length of the external electrode is also proportionally longer correspondingly to obtain a constant brightness. However, when the length of the external electrode is increased, the effective light emitting surface is reduced, and when the backlight is used, the portion of the external electrode is wide, so that the non-light emitting area where the panel does not emit light becomes large, which is a negative factor in terms of lamp efficiency. .

Therefore, although a long length and a correspondingly large diameter are required according to the use of the external electrode fluorescent lamp, the present situation still remains.

In addition, in order to increase the light emitting area, it is proposed to form a portion where the electrode is to be formed with a larger diameter than the glass tube body, but in an external electrode fluorescent lamp made of a single glass tube, it is difficult to implement a technique of expanding only a specific portion. It is not easy, therefore, it is also the present situation that the external electrode fluorescent lamp having the above-described configuration is proposed only for the concept thereof.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, and in the case where a long external electrode fluorescent lamp is required, not only the required luminance can be obtained, but also the external electrode acting as a non-emitting region. It is to provide an electrode expansion method of the external electrode fluorescent lamp that can reduce the length of the.

Another object of the present invention is to achieve an expansion process through an easier process to form only a specific portion larger than the diameter of the glass tube body in order to obtain the required amount of light, finally the external electrode having a larger diameter of the external electrode portion The present invention provides a method for expanding an electrode portion of an external electrode fluorescent lamp that enables a fluorescent lamp to be manufactured.

In order to achieve the above object, the present inventors, unlike the prior art that increases the length of the entire external electrode fluorescent lamp according to the application and thus lengthens the length of the external electrode, the diameter of the electrode portion in which the external electrode is formed the external electrode The present invention has been completed by developing a method of making the fluorescent lamp main body larger than the diameter.

In order to achieve the above object, according to one embodiment of the present invention, there is provided a method for expanding the electrode portion of the external electrode fluorescent lamp, the method comprising: (a) a glass tube body of a first diameter having both ends open; Providing; (b) adjacent to one end of the both ends, and melting near both edges of the first glass tube section in which the external electrode is to be formed, adjacent to the first ring glass tube section of a second diameter larger than the glass tube and the one end. Forming a second ring glass tube section; (c) melting the glass tube of the first diameter between the first ring glass tube section and the second ring glass tube section with a torch, expanding the tube to the same diameter as the first and second ring glass tube sections of the second diameter, and Forming a first electrode portion of the; (d) performing the steps of (b) and (c) with respect to the other end of the both ends to form an expanded second electrode part.

According to a preferred embodiment, in forming the first electrode part in the step (c), the glass tube of the first diameter between the first and second ring glass tube sections is blown while injecting air through the one end portion, A glass tube of a first diameter between the first and second ring glass tube sections while injecting air through the one end while adding a mold having a size corresponding to the length and diameter of the first electrode portion to the first electrode portion forming portion. Expand the molding, it can be carried out in the step (d).

According to another embodiment of the present invention, there is provided a method for expanding an electrode portion of an external electrode fluorescent lamp, the method comprising the steps of: (a) providing a glass tube body of a first diameter having both ends open; (b) adjacent to one end of the both ends, and melting the first glass tube section portion in which the external electrode is to be formed with a torch, and corresponding to the length and diameter of the first electrode portion of the second diameter larger than the glass tube of the first diameter; Incorporating into the mold having a size, and expanding the melted portion with the torch while injecting air corresponding to the size of the mold to form a first electrode portion; and (c) forming the second electrode part which is expanded by performing the step of (b) with respect to the other end of the both ends.

According to a preferred embodiment, in the step (b), it is possible to block one end of the glass tube body in communication with the outside, and to inject air through the other end.

According to the present invention, after forming a ring portion having a diameter corresponding to the outer electrode portion having an enlarged diameter, and expanding the glass tube between the ring portions so as to correspond to the diameter of the ring portion, the outer electrode portion having the finally expanded diameter You can get In addition, if the expansion process is carried out using a mold corresponding to the expanded diameter, a smooth and uniform diameter of the expanded outer diameter portion can be obtained without a separate finishing process. That is, through the air injection process for the torch and expansion for heating the glass, it is possible to easily expand a specific portion of the external electrode fluorescent lamp without any special skill.

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. In the following description, detailed description of the configuration well known in the art will be omitted. On the other hand, the present invention relates to a method for expanding the diameter of a specific site in which the external electrode is formed in relation to the manufacture of a double tube fluorescent lamp, the method of completing the double tube fluorescent lamp is beyond the scope of the present invention, the description thereof is omitted. do. Even if this description is omitted, those skilled in the art will be able to manufacture double tube fluorescent lamps without any difficulty using the technical configuration described herein.

1 illustrates a method of expanding an electrode portion of an external electrode fluorescent lamp according to an embodiment of the present invention.

As shown, first, a glass tube body 100 having a first diameter and having both ends open is provided.

Subsequently, only the portion of the glass tube body to which the external electrode is to be formed later is expanded to enlarge the light emitting area. Accordingly, the present invention provides a method of enlarging only a specific portion of the glass tube body to a second diameter larger than the first diameter, using a unique manner described below.

Specifically, as shown in FIG. 1, according to the present invention, an external electrode is formed near both open ends of the glass tube body, and for this purpose, the first glass tube is adjacent to one end portion 110 and will be an electrode portion later. Near both edges 122 and 124 of section 120 are melted with a torch, inflated in a ring shape and expanded. The first ring glass tube section 122 formed through this is a portion adjacent to the glass tube body, and is a portion adjacent to the one end portion 110 of the second ring glass tube section 124. As can be readily understood from the figure, the first and second ring glass tube sections 122 and 124 have the same first diameter as the glass tube body, and the first and second ring glass tube sections are less than the first diameter. It is formed with a larger second diameter.

Then, as shown, the entire first glass tube section 120 including the first and second ring glass tube sections 122, 124 is heated with a torch and then inflated to bring the entire first glass tube section to a second diameter. It expands and forms the 1st electrode part 140. FIG. At this time, according to one embodiment of the present invention, as shown, it is possible to expand the entire first glass tube section 120 while injecting air through one end.

On the other hand, when expanding the entire first glass tube section 120 including the first and second ring glass tube sections 122 and 124 while heating the tube, it may be difficult to process and mold the whole uniformly and smoothly according to the skill of the operator. have. Therefore, as shown in FIG. 2, according to a preferred embodiment of the present invention, the expansion process is performed using a mold 200 corresponding to the portion where the external electrode is formed, that is, the length and diameter of the first glass tube section. . That is, the first and second ring glass tube sections 122 and 124 are formed, and then the first glass tube section 120 is melted using a torch, and then the mold 200 (preferably with a detachable upper and lower mold part). And the air is injected at one end to expand the first glass tube section 120 corresponding to the size of the mold. As such, when using the mold 200, simply expanding the first glass tube section while injecting air, the shape of the first glass tube section is processed into a shape corresponding to the shape of the mold, so that the surface of the first glass tube section Further steps, such as trimming and uniformizing the diameter of the first glass tube section, can be omitted, making it easier to form the expanded external electrode portion.

Next, when the finishing sealing process of cutting one end of the glass tube body adjacent to the second ring glass tube section 124 and closing the portion is performed, as shown at the bottom of FIG. The formed electrode part can be formed.

Subsequently, the above process is also performed on the other end of the glass tube body 100 (not shown), whereby an external electrode fluorescent lamp glass tube in which two extended external electrode portions are finally formed can be obtained, using a conventional process. By forming an external electrode at the external electrode site, a completed external electrode fluorescent lamp can be obtained.

2 illustrates a method of expanding an electrode part of an external electrode fluorescent lamp according to another exemplary embodiment of the present invention. The embodiment shown in FIG. 2 is the same as the embodiment shown in FIG. 1 except that the first glass tube section 100 is inflated, that is, expanded using the mold 200, and thus, the overlapping description will be given. Omit.

3 illustrates a method of expanding an electrode part of an external electrode fluorescent lamp according to another exemplary embodiment of the present invention.

According to this embodiment, unlike the embodiment shown in FIGS. 1 and 2, the first glass tube section A is directly expanded without performing the process of forming the first and second ring glass tube sections.

Specifically, as shown in the drawing, after melting the glass tube section portion A in which the external electrode is formed later, the mold 200 is attached to the portion, and then air is injected through one end portion. As the air is injected, the glass tube section portion A melted to have fluidity by the torch is expanded, and its expansion is stopped by the mold 200, so that the expanded portion corresponding to the size of the mold can be obtained. In this expanded portion, an external electrode is formed later.

As such, according to the embodiment shown in FIG. 3, both edges of the first glass tube section are first expanded to form a ring shape, and then the process of expanding the glass tube portion between the rings can be omitted again, more easily and quickly. The external electrode portion can be expanded. Other processes are the same as those in the embodiment shown in Figs. 1 and 2, and thus detailed description thereof will be omitted.

As mentioned above, although this invention was demonstrated with reference to the preferable Example, it should be noted that this invention is not limited to the above-mentioned form. That is, the present invention can be modified and modified in various forms without departing from the scope of the following claims, which are all within the scope of the present invention. Accordingly, the invention is limited only by the claims and the equivalents thereof.

1 is a diagram illustrating a step-by-step process of expanding an electrode part of an external electrode fluorescent lamp according to a first exemplary embodiment of the present invention.

2 is a diagram illustrating a step-by-step process of expanding an electrode part of an external electrode fluorescent lamp according to a second exemplary embodiment of the present invention.

3 is a diagram illustrating a process of expanding an electrode part of an external electrode fluorescent lamp according to a third exemplary embodiment of the present invention.

Claims (4)

As a method of expanding the electrode portion of the external electrode fluorescent lamp, (a) providing a glass tube body of a first diameter with both ends open; (b) adjacent to one end of the both ends, and melting near both edges of the first glass tube section in which the external electrode is to be formed, adjacent to the first ring glass tube section of a second diameter larger than the glass tube and the one end. Forming a second ring glass tube section; (c) melting the glass tube of the first diameter between the first ring glass tube section and the second ring glass tube section with a torch, expanding the tube to the same diameter as the first and second ring glass tube sections of the second diameter, and Forming a first electrode portion of the; (d) performing the steps of (b) and (c) with respect to the other end of the both ends to form an expanded second electrode part; Electrode expansion method of the external electrode fluorescent lamp comprising a. The method according to claim 1, wherein in forming the first electrode portion in the step (c), by expanding the glass tube of the first diameter between the first and second ring glass tube section while injecting air through the one end portion, A glass tube of a first diameter between the first and second ring glass tube sections is injected while injecting air through the one end while adding a mold having a size corresponding to the length and diameter of the first electrode portion to the first electrode portion forming portion. Expanding and forming the electrode, the electrode part expansion method of the external electrode fluorescent lamp, characterized in that is carried out in the step (d). As a method of expanding the electrode portion of the external electrode fluorescent lamp, (a) providing a glass tube body of a first diameter with both ends open; (b) adjacent to one end of the both ends, and melting the first glass tube section portion in which the external electrode is to be formed with a torch, and corresponding to the length and diameter of the first electrode portion of the second diameter larger than the glass tube of the first diameter; Incorporating into the mold having a size, and expanding the melted portion with the torch while injecting air corresponding to the size of the mold to form a first electrode portion; (c) forming the expanded second electrode part by performing the step (b) with respect to the other end of the both ends; Electrode expansion method of the external electrode fluorescent lamp comprising a. The method according to claim 3, wherein in step (b), one end of the glass tube body communicating with the outside is blocked, and air is injected through the other end.

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