KR200422765Y1 - Cold cathode type fluorescent lamp - Google Patents

Abstract

The present invention relates to a cold cathode fluorescent lamp, and more particularly to a cold cathode fluorescent lamp that can be economically advantageously manufactured and maintained with sufficient brightness and long life.

The cold cathode fluorescent lamp of the present invention is a cold cathode fluorescent lamp, the lamp tube of which fluorescent material is coated on the inner wall, and is hollow and sealed at both ends, and the first and second covers installed at both ends of the lamp tube. And a discharge gas encapsulated in the lamp tube, first and second electrodes installed on the first and second covers, respectively, to receive external power, and the first and second electrodes respectively. It is characterized in that it comprises a first and second electron emitting means for emitting electrons to the inside of the lamp tube is installed on the electrode is supplied with external power.

Cold Cathode Fluorescent Lamp

Description

Cold Cathode Fluorescent Lamp {COLD CATHODE TYPE FLUORESCENT LAMP}

1 is a schematic diagram of a cold cathode fluorescent lamp according to an embodiment of the present invention, (a) is a schematic diagram of a cold cathode fluorescent lamp according to the first embodiment, and (b) is a second embodiment of the present invention. Schematic of Cold Cathode Fluorescent Lamp

2 is a simplified view of a cold cathode fluorescent lamp according to a third embodiment of the present invention

3 is a view showing an example of a variety of electronic radiation means according to the present invention

<Description of the symbols for the main parts of the drawings>

10 lamp tube 20 cover

30 electrode 40 electron emitting means

50 power supply 60 wire

The present invention relates to a cold cathode lamp, and more particularly to a cold cathode fluorescent lamp that can be economically advantageously manufactured and maintained with sufficient brightness and long life.

In general, a fluorescent lamp is a light source that emits visible light by irradiating various phosphors coated on an inner wall of an ultraviolet glass tube generated from low-pressure mercury vapor, and exhibits various colors depending on the type of the phosphor. In the glass tube of the fluorescent lamp, a small amount of mercury and argon, which emits ultraviolet rays by electrons emitted from the filament, is generally enclosed. The filaments are generally double or triple coil filaments, and metal oxides are applied to the filaments to emit hot electrons.

Since the conventional fluorescent lamps require a constant preheating time to emit electrons from the filament, when frequent flashing is performed, the lamp life is not only shortened, but it is also economically disadvantageous in terms of energy consumption.

Accordingly, cold cathode fluorescent lamps using the principle of cold cathode rays have been developed and used, which are used in backlights of LCDs and the like. Since the cold cathode fluorescent lamp has a high voltage for releasing electrons necessary for sustaining discharge from the electrode, the power loss at the electrode is large, so that the electrode loss must be reduced for high efficiency of the fluorescent lamp.

The discharge area of the electrode should be designed to be large, but the smaller the electrode diameter, the smaller the discharge area, but even if the electrode diameter is too large, the gap between the electrode and the inner wall of the tube becomes narrow, which makes it difficult to discharge electrons on the side of the electrode during discharge. The area is smaller and the cathodic drop voltage is higher. On the other hand, if the electrode field is long, the useless invalid field, which is not resistant to light emission, becomes long, which is disadvantageous in that the compact design of the device is disadvantageous.

The present invention has been made to solve the above problems, and an object thereof is to provide a cold cathode fluorescent lamp having a compact structure.

Another object is to provide means for emitting electrodes and electrons of various types of cold cathode fluorescent lamps.

Cold cathode fluorescent lamp of the present invention for achieving the above object is a cold cathode fluorescent lamp, a fluorescent material is coated on the inner wall, the cylindrical hollow and sealed at both ends of the lamp tube, 1, a second cover, a discharge gas encapsulated inside the lamp tube, first and second electrodes installed on the respective first and second covers to receive external power, and the respective And first and second electron emitting means installed on the first electrode and the second electrode to receive electrons from the outside to emit electrons into the lamp tube.

In addition, in the cold cathode fluorescent lamp of the present invention, each of the first and second covers, and each of the first and second electrodes is formed of a conductor, and the wires for receiving external power are each of the first And a second cover, one end of each of the first and second electrodes protrudes into the lamp tube, and the other end of the first and second covers is inserted into the first and second covers, respectively, and the external power source is provided in each of the first and second covers. And supplied to the first and second electrodes through the second cover.

In addition, each of the first electrode and the second electrode in the cold cathode fluorescent lamp of the present invention, one end is protruded into the interior of the lamp tube and the other end is protruded to the outside to be inserted into the fixing hole of the outside It is characterized in that the bar type penetrating through each of the first and second cover.

In addition, the cold cathode fluorescent lamp of the present invention is characterized in that the first and second electron-emitting means is installed at one end of the first and second electrodes.

In addition, in the cold cathode fluorescent lamp of the present invention, the first and second electron-emitting means may include first and second branch portions branched from each of the first and second electrodes in a symmetrical direction, and It characterized in that it comprises a coil filament connecting the first branch and the second branch.

In the cold cathode fluorescent lamp of the present invention, the first and second electron-emitting means may include an extension part extending from each of the first and second electrodes and a coil filament provided to surround the extension part. It features.

In addition, in the cold cathode fluorescent lamp of the present invention, the first and second electron-emitting means may include an extension part extending from each of the first and second electrodes, and a plurality of emission bars disposed in an oblique direction on an outer surface of the extension part. It is characterized by including.

In addition, in the cold cathode fluorescent lamp of the present invention, each of the electron-emitting means is characterized in that the calcium carbonate powder is further applied to increase the emission efficiency.

Hereinafter, with reference to the accompanying drawings 1 to 3 will be described an embodiment of the present invention.

1 is a schematic diagram of a cold cathode fluorescent lamp according to an embodiment of the present invention, (a) is a schematic diagram of a cold cathode fluorescent lamp according to the first embodiment, and (b) is a second embodiment of the present invention. 2 is a schematic view of a cold cathode fluorescent lamp according to an embodiment of the present invention, and FIG. 2 is a schematic view of a cold cathode fluorescent lamp according to a third embodiment of the present invention, and FIG.

First, the structure will be described with reference to FIG. 1.

In the cold cathode fluorescent lamp of this embodiment, a fluorescent material is coated on an inner wall of the lamp tube, and a cylindrical hollow lamp tube 10 is installed at both ends of the lamp tube 10 to perform exterior treatment of both ends of the lamp tube 10. A plurality of covers 20 for discharging, a discharge gas encapsulated in the lamp tube 10, a plurality of electrodes 30 installed on the covers 20 to receive external power, A plurality of electron emitting means 40 is installed inside the lamp tube 10 of each electrode 30 to receive the power from the power supply unit 50 to emit electrons into the lamp tube 10. Include.

The cold cathode fluorescent lamp shown in (a) of FIG. 1 shows that the plurality of electrodes 30 are installed in a state in which the plurality of electrodes 30 are penetrated, and the power of the power supply unit 50 is the electrode 30. The wire 60 is connected to the electrode 30 so as to be directly applied to the electrode 30.

In the cold cathode fluorescent lamp of the embodiment illustrated in FIG. 1B, the plurality of lids 21 and the plurality of electrodes 31 are formed of a conductor, and the power supply unit 50 receives a wire 60 to receive power. It is connected to each cover 21, one end of each electrode 31 protrudes inside the lamp tube 10 and the other end is inserted into each cover 21, the power supply unit ( The power of 50 is supplied to each electrode 31 through each cover 21. Therefore, a compact lamp can be provided as compared with the cold cathode fluorescent lamp of Fig. 1A.

2 illustrates a structure in which an electrode is inserted into a hole such as a fluorescent lamp currently in use so that the lamp can be supported while being supplied with power. In the cold cathode fluorescent lamp of the embodiment illustrated in FIG. 2, one end of the plurality of electrodes 30 protrudes into the lamp tube 10, and the other end supports the lamp simultaneously with an external fixing hole, that is, power supply. It is shown that the bar type protruding outward so as to be inserted into the fixing hole for fixing to penetrate through the cover 22.

3 shows electron emitting means 40 of various embodiments, and (a) shows a plurality of branch portions 41 branched from an electrode inside the lamp tube 10, and the respective branch portions 41, respectively. ) Is shown a coil filament 42 connected. The plurality of branch portions 41 are branched in mutually symmetrical directions, and (a) is formed in a rectangular shape, and (b) is formed in an arc shape. As shown in (a) and (b) of FIG. 3, the electron-emitting means 40 has an advantage that the discharge area is increased by forming an empty cup shape.

In FIG. 3C, an electron emission means 40 including an extension part 32 extending from an electrode and a coil filament 33 installed to surround the extension part 32 is illustrated. (d) shows an electron emission means 40 comprising an extension portion 32 'extending from the electrode and a plurality of emission bars 33' provided in an oblique direction from the outer surface of the extension portion 32 '. have.

As described above, it is possible to control the discharge area by varying the shape of the electron emitting means, so that it is easy to design a cold cathode fluorescent lamp suitable for the characteristics.

In addition, calcium carbonate (CaCO ₃ ) powder is applied to the electron emission means in the present embodiments to increase emission efficiency. In this case, when the thickness of the powder is thick, an adverse effect occurs, so that the calcium carbonate powder having a diameter of about 1 mm or less is preferably applied to the electron emission means.

The cold cathode fluorescent lamp of the present invention as described above has the effect of providing reliability to the user by simplifying the manufacturing process by providing a cover for sealing both ends thereof as a conductive material and providing a compact fluorescent lamp.

In addition, it is possible to adjust the electron discharge area of the electrode according to the characteristics of the lamp has the advantage that the design of the cold cathode fluorescent lamp is easy.

One embodiment of the present invention described above should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art may change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (10)

Cold cathode fluorescent lamp, A lamp tube coated with a fluorescent material on the inner wall, cylindrically hollow, and sealed at both ends; First and second covers provided at both ends of the lamp tube; A discharge gas enclosed in the lamp tube; First and second electrodes installed on the respective first and second covers to receive external power; Cold cathode fluorescent lamps, characterized in that the first electrode and the second electrode is provided with a first and second electron emitting means for emitting electrons into the interior of the lamp tube is supplied with external power . The method of claim 1, Each of the first and second covers and each of the first and second electrodes is formed of a conductor, and an electric wire for receiving external power is connected to the respective first and second covers, One end of the first and second electrodes protrudes inside the lamp tube and the other end is inserted into the first and second covers, respectively. And the external power is supplied to the first and second electrodes through the first and second covers, respectively. The method of claim 1, Each of the first electrode and the second electrode, Cold cathode fluorescent lamp characterized in that the one end is protruded into the inside of the lamp tube and the other end is a bar type protruding outward so as to be inserted into the fixing hole of the outside and penetrated through the first and second covers, respectively. . The method according to claim 2 or 3, The first and second electron-emitting means are cold cathode fluorescent lamps, characterized in that installed on one end of the first and second electrodes. The method of claim 4, wherein The first and second electron emitting means, And a coil filament connecting the first branch portion and the second branch portion to the first branch portion and the second branch portion branched from each of the first and second electrodes in a symmetrical direction. Type fluorescent lamp. The method of claim 4, wherein The first and second electron emitting means, And an extension part extending from each of said first and second electrodes, and a coil filament provided to surround said extension part. The method of claim 4, wherein The first and second electron emitting means, And an extension part extending from each of the first and second electrodes, and a plurality of emission bars disposed in an oblique direction on an outer surface of the extension part. The method of claim 5, And each of the electron-emitting means is further coated with calcium carbonate powder to increase the emission efficiency. The method of claim 6, And each of the electron-emitting means is further coated with calcium carbonate powder to increase the emission efficiency. The method of claim 7, wherein And each of the electron-emitting means is further coated with calcium carbonate powder to increase the emission efficiency.

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