KR101078402B1 - Electrode of discharge lamp with glass thin film layer - Google Patents

Abstract

The present invention relates to a discharge lamp electrode having a glass thin film formed on the surface, and more specifically, to the electrode material such as the external electrode discharge lamp while preventing the electrode material from being sputtered in the plasma (PLASMA) like the internal electrode discharge lamp. It can prevent the damage of glass tube caused by thermal shock due to the direct contact of the lamp glass tube, which can prolong the life of the discharge lamp drastically, and prevent the deterioration of the lamp efficiency due to blackening by the sputtering of the electrode material. In order to prevent the price increase, the lamp glass tube 10 in which the discharge gas 12 is enclosed in a sealed state and spaced apart from the lamp glass tube 10 on both sides of the inside of the lamp glass tube 10 are installed. In a discharge lamp electrode comprising a pair of electrodes 13 connected to the 14, the discharge lamp electrode having a glass thin film 15 formed on the surface of each electrode 13 This is provided.

Description

ELECTROLDE OF DISCHARGE LAMP WITH GLASS THIN FILM LAYER}

The present invention is to prevent the damage of the glass tube caused by the thermal shock due to direct contact between the electrode and the lamp glass tube like the external electrode discharge lamp while preventing the electrode material is not spattering in the plasma (PLASMA) like the internal electrode discharge lamp. The present invention relates to a discharge lamp electrode in which a glass thin film is formed on a surface of the electrode surface installed inside the discharge lamp by coating the discharge lamp electrode with glass in which no spattering occurs in the plasma.

In general, the discharge lamp is a device that installs conductive electrodes such as carbon or metal on both sides of the lamp glass tube and fills the discharge gas therein to apply electric power to both electrodes, thereby causing the discharge inside the glass tube to emit light.

3 is a configuration diagram of a conventional internal electrode discharge lamp, in which a general internal electrode discharge lamp is provided with internal electrodes 4 of a conductive material on both sides of the lamp glass tube 1, and supplies electric power to the internal electrodes 4. It is connected to the power introduction line (3) so that it can be applied, there is a discharge gas (2) inside the lamp glass tube (1).

In this case, when electric power is applied to the internal electrode 4, the discharge gas is converted into a plasma state by the discharge and the converted plasma emits light. At this time, the electrode material constituting the internal electrode 4 is sputtered. .

However, when the internal electrode 4 is spattered in the plasma, the life of the internal electrode 4 is shortened and eventually the life of the discharge lamp is shortened. In addition, the sputtered electrode material is attached to the inner wall of the lamp glass tube 1 to cause a blackening portion 5 in which the inner wall of the lamp glass tube 1 is blacked, thereby causing a problem of lowering light emission efficiency.

In order to solve this problem, an external electrode discharge lamp as shown in FIG. 4 has been proposed. 4 is a configuration diagram of a conventional external electrode discharge lamp, the general external electrode discharge lamp is installed on the outer surface of both sides of the lamp glass tube 1, the external electrode 6 connected to the power lead wire 3, according to this structure Since the sputtering of the external electrode 6 by plasma can be prevented, shortening of lamp life and blackening can be avoided, while the boundary C between the external electrode 6 and the lamp glass tube 2 is cracked by thermal shock. It implies a problem. That is, when the discharge lamp is turned on, the external electrode 6 rapidly rises to a high temperature while the lamp glass tube 1 rises at a low speed, and also between the lamp glass tube that is in contact with the external electrode 6 and the lamp glass tube that is not. There is a problem that cracks, such as cracks due to thermal shock occurs in the lamp glass tube boundary (C) in contact with the external electrode 6 due to a large temperature deviation occurs.

In order to solve this problem, a quartz glass tube having a low coefficient of thermal expansion may be used. However, a glass having a low coefficient of thermal expansion is generally expensive, and thus, a manufacturing cost of the discharge lamp is increased.

In order to solve the above problems, the present invention, while the electrode material is not spattered into the plasma (PLASMA) like the internal electrode discharge lamp, the electrode and the lamp glass tube directly contact like the external electrode discharge lamp Providing a new concept of discharge lamp electrode that prevents damage at the same time, it greatly extends the life of the discharge lamp, prevents serious lamp efficiency from blackening and prevents the lamp price from rising. It is to provide a discharge lamp electrode formed with a thin film.

In order to achieve the above object, the present invention provides a lamp glass tube (10) in which the discharge gas (12) is enclosed in a sealed state, and is spaced apart from the lamp glass tube (10) inside both sides of the lamp glass tube (10), and the power introduction line (14). And a pair of electrodes 13 connected to each other, and a glass thin film 15 coated on the surface of each electrode 13.

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In addition, a fluorescent thin film 11 may be formed on an inner surface of the lamp glass tube 10.

In addition, the pair of electrodes 13 may be in the form of a hollow electrode, and each opening may be installed to face each other.

According to the present invention, the electrodes are spaced apart so as not to contact the lamp glass tubes on both sides of the inside of the lamp glass tube, and when the glass thin film is formed on the surface of the electrode where no spattering occurs in plasma, the spatter of the electrode material It is possible to prevent turing and at the same time to prevent partial temperature deviation of the lamp glass tube.

Therefore, it is possible to prevent blackening or shortening of the lifetime of the electrode due to the sputtering of the electrode material of the conventional internal electrode discharge lamp, and further to prevent cracking of the glass tube due to thermal shock of the conventional external electrode discharge lamp. This makes it possible to manufacture inexpensive quartz glass without using expensive quartz glass, but also greatly extend the life of the discharge lamp. Invention.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail below. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

1 is a block diagram of a discharge lamp according to an embodiment of the present invention, Figure 2 is an enlarged view of the 'A' portion of Figure 1 is a block diagram of the internal electrode. 1 and 2, the inside of the lamp glass tube 10 in a sealed state is filled with a discharge gas 12, and both sides of the lamp glass tube 10 have conductivity such as carbon or a metallic material. A pair of electrodes 13 are provided, and each electrode 13 is electrically connected to the power introduction line 14 and configured to be energized.

Each of the electrodes 13 is installed at a predetermined distance from the lamp glass tube 10 so as not to contact the inner surface of the lamp glass tube 10, and as shown in FIG. 2, the surface of each electrode 13 is disposed in a plasma. The glass thin film 15 in which no spattering occurs is coated.

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For example, when glass is thinned, the powder obtained by pulverizing the glass is mixed with an adhesive, and the mixed material is applied or impregnated on the electrode 13 to adhere the glass powder to the electrode surface, and then fired at a high temperature. Is evaporated so that a pure glass powder is coated on the electrode 13 surface.

In this case, the composition of the glass thin film 15 is that the sputtering does not occur in the plasma in consideration of the type of the electrode 13, the bonding force is large and the electrode 13, and the thermal expansion coefficient is similar to the material of the electrode 13 It is preferable to select as a reference, and when forming the glass thin film 15, it is preferable to coat so as to block even the minute hole so that the electrode 13 is not exposed.

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In addition, according to the shape of the discharge lamp to which the lamp glass tube 10 is applied, the fluorescent thin film 11 layer may be coated on the inner surface of the lamp glass tube 10, in which case it may be used as a fluorescent lamp, and also the fluorescent thin film 11 ) Is not formed, a specific gas such as neon, nitrogen, or the like may be filled so that the discharge gas inside the lamp glass tube 10 directly emits light.

In this case, the lamp glass tube 10 and the power lead wire 14 have a high mutual coupling force and similar thermal expansion coefficients to prevent the lamp glass pipe 10 and the power lead wire 14 from being separated from each other. The filled discharge gas 12 is prevented from leaking.

In addition, when the pair of electrodes 13 are formed in the form of a hollow electrode, and the openings of the electrodes 13 face each other, the surface area of the electrodes can be increased to increase the discharge efficiency, which is advantageous. .

The shape of the cavity electrode may be variously designed, for example, as shown, one electrode may be in the shape of '⊂' and the other electrode may be in the shape of '⊃' so that the openings may face each other. It should be understood that the cavity type is not limited to the illustrated example.

As such, when the discharge gas 12 is enclosed in the lamp glass tube 10, and the electrode 13 to which the electric power introduction line 14 is connected is spaced apart from the lamp glass tube 10 in the lamp glass tube 10 and turned on, the electrode ( Since the 13 is protected by the glass film 15 and is not spattered, the life of the electrode 13 can be extended, and the inner surface of the lamp glass tube 10 is not blackened, and the lamp glass tube 10 ) Partial temperature deviation is minimized, such as temperature rises and falls uniformly over the entire area, so there is no crack due to thermal shock.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications should not be individually understood from the technical spirit or prospect of the present invention.

1 is a configuration diagram of a discharge lamp according to an embodiment of the present invention.

FIG. 2 is an enlarged view of an 'A' part of FIG. 1 and is a configuration diagram of an internal electrode.

3 is a block diagram of a conventional internal electrode discharge lamp.

4 is a configuration diagram of a conventional external electrode discharge lamp.

<Description of Symbols for Main Parts of Drawings>

10 ... Lamp glass tube

11. Fluorescent thin film

12. Discharge gas

13 ... electrode

14 ... Electric Power Line

15 ... glass thin film

Claims (4)

The lamp glass tube 10 having the discharge gas 12 enclosed in a sealed state, and a pair of electrodes 13 spaced apart from the lamp glass tube 10 on both sides of the lamp glass tube 10 and connected to the power introduction line 14. In the discharge lamp electrode comprising: A discharge lamp electrode having a glass thin film formed on the surface, characterized in that the glass thin film 15 is coated on the surface of each electrode (13). delete The method according to claim 1, The discharge lamp electrode having a glass thin film formed on the surface, characterized in that the fluorescent film 11 is formed on the inner surface of the lamp glass tube (10). The method according to claim 1 or 3, A discharge lamp electrode having a glass thin film formed on a surface thereof, wherein the electrode 13 is in the form of a hollow electrode, and the openings are opposed to each other.

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