WO2012109772A1

WO2012109772A1 - Ceramic-glass composite electrode and fluorescent lamp using the same

Info

Publication number: WO2012109772A1
Application number: PCT/CN2011/000256
Authority: WO
Inventors: 林文飞
Original assignee: 盛陶盟(香港)有限公司
Priority date: 2011-02-18
Filing date: 2011-02-18
Publication date: 2012-08-23
Also published as: KR101629624B1; KR20130124361A; KR20150086397A; JP5684408B2; JP2014507764A

Abstract

A ceramic-glass composite electrode and a fluorescent lamp using the same are provided. The ceramic-glass composite electrode (430) made of a ceramic-glass composition is disposed at the end of the glass tube (412) of the fluorescent lamp (400). A blocking member (414) disposed at the end of the glass tube (412) is placed against the ceramic-glass composite electrode (430) to limit the position of the ceramic-glass composite electrode sleeved at the glass tube and prevent adhesives (440) from flowing into the glass tube when the glass tube and the ceramic-glass composite electrode are bonded, and thereby the service lifetime of the fluorescent lamp is increased.

Description

Ceramic glass composite electrode and fluorescent lamp thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an electrode and a fluorescent lamp, and more particularly to a ceramic glass composite electrode and a fluorescent lamp thereof, which prevent an adhesive from entering a glass tube of a fluorescent lamp to extend the life of the fluorescent lamp. Background technique

Referring to FIG. 1, it is a cross-sectional view of a conventional cold cathode fluorescent lamp of a backlight module of a TFT-LCD. The fluorescent lamp 100 comprises a glass tube 120 comprising a pair of cup-shaped metal electrodes 110 inserted at both ends of the glass tube 120, and two lead wires 1 30 are respectively connected to the ends of the two metal electrodes 110. When the fluorescent lamp 100 is manufactured, even if the fluorescent lamp 100 is emptied to a vacuum level, main electrons naturally occurring due to cosmic rays appear therein. In the manufacturing process of the fluorescent lamp 100, after the clearance, the fluorescent lamp 100 is filled with a helium argon gas (Ne-Ar) 150 at a pressure of 50 torr or more. When a high voltage alternating current is applied to the metal electrodes 110 located at both ends of the fluorescent lamp 100, the main electrons are accelerated by the electric field to ionize the helium argon gas 150. When this ionization continues, a spark plasma is formed, in which the cation 160 and the negative electron 140 coexist. The cation 160 and the electron 140 collide with the two metal electrodes 110 and are therefore neutralized. In this case, secondary electrons are generated from the two metal electrodes 110 due to the collision, so that continuous discharge can be performed. Thus, the generation of secondary electrons is an important factor in achieving continuous light emission. If it contributes to secondary electron emission, high brightness can be maintained.

When electron 140 collides with a neutral mercury atom 170, mercury atom 170 can be excited. When the excited mercury atoms 170 return to ground, they emit UV light 180. The UV light 180 is incident on the monument 190 coated on the inner side wall of the glass tube 120, and thus converted into visible light 181. Accordingly, the electron 140 or the cation 160 strikes the metal electrode 110, and sputtering is generated at the metal electrode 110. The metal electrode elements scattered by sputtering are attached to the mercury atoms 170, thus constituting a composite. When this composite is deposited near the metal electrode 110, darkening occurs, which causes the life of the fluorescent lamp 100 to be shortened. Therefore, shortening the life is a major problem for the fluorescent lamp 100.

In order to overcome this problem, several methods have been proposed today. (1) A method of reducing the initial voltage of discharge according to excitation and ionization of helium-argon gas 150 loaded into the fluorescent lamp 100, thereby reducing electrons 140 or cations striking the metal electrodes 110 a pulse of 160 to weaken the sputtering; and (2) a method of reducing the initial voltage of the discharge by reducing the gas pressure as low as possible. However, when the initial discharge voltage is low, the kinetic energy of the cation 160 or the electron 140 striking the metal electrode 110 is reduced, and the emission of the secondary electrons from the metal electrode 110 is lowered, thus causing the luminance of the fluorescent lamp 100 to be weakened. In order to overcome this problem, another method is further proposed which selectively forms the metal electrode 110 using a material having low work efficiency, so as to contribute to the supply of electrons by the metal electrode 110. However, this approach increases manufacturing costs because such materials are expensive. In addition, this method must also use expensive borosilicate glass as the material of the glass tube 120, thereby adjusting the coefficient of thermal expansion of the glass tube 120 and the lead-in wiring 130. The fluorescent lamp 100 has a low resistance, so that its resistance component is remarkably high, so that one transformer can drive only one fluorescent lamp 100, resulting in an increase in total manufacturing cost. Further, since the diameter of the glass tube 120 is increased, such brightness is greatly reduced, and the mechanical strength of the fluorescent lamp 100 is weak. Therefore, the above fluorescent lamp 100 is not easily used for a backlight which requires a large-diameter fluorescent lamp (tube diameter: 4 mm or more) as a large-sized television.

In order to solve this problem, a fluorescent lamp having an external electrode has been developed. As shown in FIG. 2, the outer surfaces of the two ends of the glass tube 210 are respectively provided with a conductor layer 221, or are respectively sleeved in a metal cap 220. Contact the metal cap 220. In the fluorescent lamp 200 having the external electrodes of Fig. 2, phosphorous is applied to the inner surface of the glass tube 210, and both ends thereof are sealed. The inner space of the glass tube 210 is filled with a mixture containing a charged gas containing an inert gas such as argon (Ar) or helium (Ne) and a mercury (Hg) gas. The conductor layer 221 has various shapes and is disposed at an outer surface of both ends of the glass tube 210, which may be a silver shield or a carbonaceous material. Further, the metal tube caps 220 are respectively provided at both ends of the glass tube 210.

When a high voltage alternating current (AC) is applied to the conductor layer 221, both ends of the glass tube 210 contacting the metal cap 220 act as a dielectric material to generate a strong induced electric field. In more detail, when the polarity of the voltage applied to the metal cap 220 is positive, electrons are accumulated in the glass tube 210 contacting the conductor layer 221. On the other hand, when the polarity of the voltage is negative, the cation is accumulated in the glass tube 210 contacting the conductor layer 221. Since the electric field of the alternating current is continuously and extremely converted, the side wall charges accumulated at both ends of the glass tube 210 are exchanged between the opposite ends of the glass tube 210. Thus, when the side wall charges impinge on the mercury gas supplied together with the inert gas, the mercury atoms are excited. Then, the UV light generated during the excitation process excites the phosphorous coated on the inner side wall of the glass tube 210, thereby emitting visible light.

Conventionally, a fluorescent lamp 200 having an external electrode, since a region at both ends of the glass tube 210 is used as a dielectric material and the conductor layer 221 is provided, the end region is enlarged, thereby increasing the scale of the side wall charge, thereby increasing the fluorescent lamp. The brightness of 200. However, the conductor layer 221 has a limitation in extending in the longitudinal direction, so that in the longitudinal direction of the conductor layer 221, the radiated light is reduced, thereby reducing the luminous efficiency.

Based on the above disadvantages, the Chinese Patent Application Publication No. 200842928 "Fluorescent Lamp with Ceramic Glass Synthetic Electrode" discloses a ceramic glass composite electrode which is a composite of ceramic and glass, which has a high The dielectric constant, higher secondary electron emission efficiency, and higher polarity under the same electric field, can move more electrons and cations to increase the brightness of the fluorescent lamp. As shown in FIG. 3, the ceramic glass composite electrode 300 is in the middle. An empty cylindrical shape is provided at both ends of the glass tube. The ceramic glass composite electrode 300 has two inner diameters 310 and 313. The inner diameters 310 and 313 are not the same, and the inner diameter 310 is smaller than the inner diameter 313, so the ceramic glass composite electrode 300 The inside is stepped, and the inner diameter 313 is slightly larger than the outer diameter of the glass tube, so that the ceramic glass composite electrode 300 can be sleeved at the end of the glass tube, and the inner diameter 310 is smaller than the outer diameter of the glass tube.

The ceramic glass composite electrode 300 is sleeved in front of the glass tube, and the outer surface of the end of the glass tube must be coated with an adhesive, and then the ceramic glass composite electrode 300 is sleeved at the end of the glass tube to fix the ceramic glass composite electrode 300. The end of the glass tube. However, since the dose of the adhesive applied to the outer surface of the glass tube is not easily controlled, it is easy to apply too much or too little adhesive to the outer surface of the glass tube, and if the adhesive is too small, the ceramic glass composite electrode 300 cannot be surely fixed. At the end of the glass tube; if there is too much adhesive, it will overflow into the glass tube, which will pollute the mixed gas in the glass tube, which will affect the luminous efficiency and service life of the fluorescent lamp. In addition, since the inner diameter of the ceramic glass composite electrode 300 is not the same, it is difficult to manufacture, which increases the complexity and cost of the manufacturing process. Therefore, how to prevent the adhesive from flowing into the glass tube when the ceramic glass composite electrode 300 is placed at the end of the glass tube is an important issue today.

Accordingly, the present invention has been made in view of the above problems, and a ceramic glass composite electrode and a fluorescent lamp thereof can not only improve the disadvantages of the prior art described above, but also increase the service life of the fluorescent lamp to solve the above problems. Summary of the invention

The object of the present invention is to overcome the defects of the existing ceramic glass composite electrode and provide a novel structure of the ceramic glass composite electrode. The technical problem to be solved is that the ceramic glass composite electrode has a hollow cylinder and the same inner diameter. It is easy to manufacture and reduce cost with a simple structure, and is very suitable for practical use.

Another object of the present invention is to overcome the defects of the existing fluorescent lamp and to provide a novel structure of a fluorescent lamp having a ceramic glass composite electrode. The technical problem to be solved is to have a stopper for the end of the glass tube to When the ceramic glass composite electrode is sleeved at the end of the glass tube, the ceramic glass composite electrode is pressed against the ceramic glass composite electrode to limit the position of the ceramic glass composite electrode at the glass tube, and the adhesive is prevented from flowing into the glass tube when the glass tube and the ceramic glass composite electrode are bonded. It affects the service life of fluorescent lamps, which makes them more suitable for practical use.

The object of the present invention and solving the technical problems thereof are achieved by the following technical solutions. A fluorescent lamp having a ceramic glass composite electrode according to the present invention, comprising: a glass tube; at least one blocking member disposed at at least one end of the glass tube; and a plurality of ceramic glass composite electrodes respectively disposed on The two ends of the glass tube are opposite to the blocking member of the glass tube, and the ceramic glass composite electrodes are a ceramic glass composite.

The object of the present invention and solving the technical problems thereof can be further achieved by the following technical measures. In the above fluorescent lamp having a ceramic glass composite electrode, the ceramic glass composite electrodes are a cylinder and have only one inner diameter, and the interiors of the ceramic glass composite electrodes have a straight cylindrical shape.

The fluorescent lamp having the ceramic glass composite electrode further includes: a plurality of conductor layers respectively disposed on outer surfaces of the ceramic glass composite electrodes.

The fluorescent lamp having the ceramic glass composite electrode further includes: a plurality of sealing components respectively disposed at the ends of the ceramic glass composite electrodes.

The foregoing fluorescent lamp having a ceramic glass composite electrode, wherein the sealing components respectively have a blocking member for holding the end of the ceramic glass composite electrode.

The aforementioned fluorescent lamp having a ceramic glass composite electrode, wherein the barrier member is a projection and is annular.

The object of the present invention and the technical problem thereof are the following technical solutions. The ceramic glass composite electrode according to the present invention comprises: an electrode body disposed at an end of a glass tube of a fluorescent lamp, and It is a cylinder and is a ceramic glass composite having only an inner diameter.

The object of the present invention and solving the technical problems thereof can be further achieved by the following technical measures. The ceramic glass composite electrode further includes: a conductor layer disposed on an outer surface of the electrode body.

In the foregoing ceramic glass composite electrode, the inside of the electrode body has a straight cylindrical shape. The aforementioned ceramic glass composite electrode, wherein the electrode body abuts against a stopper located at the end of the glass tube.

The present invention has significant advantages and advantageous effects over the prior art. According to the above technical solution, the ceramic glass composite electrode of the present invention and the fluorescent lamp thereof have at least the following advantages and advantageous effects: the fluorescent lamp having the ceramic glass composite electrode of the present invention comprises a glass tube, at least one blocking member and a plurality of ceramic glass composite electrodes, The blocking member is disposed on at least one end of the glass tube, and the ceramic glass composite electrodes are respectively disposed at both ends of the glass tube and are opposite to the blocking member of the glass tube to limit the position of the ceramic glass composite electrode at the glass tube, and avoid the subsequent The agent flows into the glass tube, which increases the life of the fluorescent lamp. The ceramic glass composite electrode of the present invention is a cylinder and is a ceramic glass composite. The cylinder has only one inner diameter, so that the structure is simple and convenient for production and production, and the manufacturing cost can be reduced.

In summary, the present invention relates to a ceramic glass composite electrode and a fluorescent lamp thereof. The ceramic glass composite electrode is a ceramic glass composite disposed at the end of a glass tube of the fluorescent lamp, and a stopper is disposed at the end of the glass tube for resisting the ceramic glass composite electrode to limit the ceramic glass composite electrode to the glass. The position of the tube and the adhesion of the glass tube to the ceramic glass composite electrode are prevented from flowing into the glass tube, thereby increasing the service life of the fluorescent lamp. The invention has significant advances in technology and has obvious positive effects, and is a novel, progressive and practical new design.

The above description is merely an overview of the technical solution of the present invention, in order to more clearly understand the present invention. The above and other objects, features and advantages of the present invention will become more apparent and understood in the light of the description. . BRIEF DESCRIPTION OF THE DRAWINGS

1 is a cross-sectional view of a conventional cold cathode fluorescent lamp of a backlight module of a TFT-LCD.

2 is a cross-sectional view of a conventional fluorescent lamp with an external electrode.

Fig. 3 is a cross-sectional view showing a conventional conventional ceramic glass composite electrode.

4A and 4B are cross-sectional views showing a preferred embodiment of a fluorescent lamp having a ceramic glass composite electrode of the present invention.

Fig. 5A is a plan view showing a preferred embodiment of the ceramic glass composite electrode of the present invention.

Figure 5B is a cross-sectional view showing a preferred embodiment of the ceramic glass composite electrode of the present invention.

Figure 6 is a cross-sectional view showing a second preferred embodiment of a fluorescent lamp having a ceramic glass composite electrode of the present invention.

Figure 7 is a graph of dielectric constant-temperature for a preferred embodiment of the present invention.

Figure 8 is a graph of luminance-dielectric constant of a preferred embodiment of the present invention;

Figure 9 is a graph of polarity versus electric field in accordance with a preferred embodiment of the present invention.

Figure 10 is a graph of polarity versus electric field in accordance with a preferred embodiment of the present invention.

100 : Cold cathode fluorescent lamp 110 : Metal electrode

120 : Glass tube 130 : Import wiring

140 electron 150 : Ne-Ar gas

160 cation 170 : mercury atom

180 UV light 181 : visible light

190 Phosphorus 200 : External electrode fluorescent lamp

210 glass tube 220 : metal cap

221 conductor layer 300 : synthetic electrode

310 inside diameter 313 : inner diameter

400 fluorescent light 412 : glass tube

414 blocking member 420 : sealing component

423 Blocker 430 : Electrode

435 electrode body 440 : follow-up agent

450 : Conductor layer 460 : Electrode The best way to achieve the invention

In order to further explain the technical means and efficacy of the present invention for achieving the intended purpose of the invention, the ceramic glass composite electrode and the proposed ceramic glass according to the present invention will be described below with reference to the accompanying drawings and preferred embodiments. The specific embodiment, structure, characteristics and efficacy of the fluorescent lamp are described in detail later.

The foregoing and other objects, features, and advantages of the invention will be apparent from the Detailed Description Through the description of the specific embodiments, a more in-depth and specific understanding of the technical means and functions of the present invention for achieving the intended purpose is obtained, but the drawings are only for reference and explanation, and are not intended to be used for the present invention. Limit it.

Referring to Figures 4A and 4B, there is shown a cross-sectional view of a first embodiment of a fluorescent lamp having a ceramic glass composite electrode of the present invention. As shown, the fluorescent lamp 400 of the present invention comprises a glass tube 412, a plurality of sealing assemblies 420, and a plurality of electrodes 430. The glass tube 412 has an internal space for filling a mixture of an inert gas and a metal vapor (not shown). Further, the inner surface of the glass tube 412 is coated with a phosphorous. The glass tube 412 may have a tubular shape, a U shape or a rectangular shape. In Figs. 4A and 4B, the glass tube 412 is tubular. The glass tube 412 may be composed of borosilicate, lead-free glass or quartz glass. Further, the glass tube 412 of the present invention has a stopper 414 at both ends thereof. In an embodiment of the invention, the blocking members 414 are projections and are annular.

The electrodes 430 are ceramic glass composite electrodes comprising a ceramic glass composite having high dielectric constant and high secondary electron emission efficiency. The electrodes 430 are respectively disposed at the two ends of the glass tube 412. One ends of the electrodes 430 respectively abut the two blocking members 414 at both ends of the glass tube 412. Therefore, the blocking members 414 are used to limit the positions of the electrodes 430 at the glass tube 412, that is, to define the length of the glass tube 412 extending into the electrodes 430. The sealing assemblies 420 are respectively disposed at the other ends of the electrodes 430. One ends of the sealing components 420 respectively have a blocking member 423 for resisting the ends of the electrodes 430 to limit the The electrode 430 is located at the position of the sealing assembly 420, that is, the length of the sealing assembly 420 extending into the electrodes 430. In an embodiment of the invention, the blocking members 423 are protrusions and are annular. As shown in FIG. 4B, after the filling of the mixture into the glass tube 412, the sealing components 420 are heat-treated to seal the original openings of the sealing components 420, and the sealing components 420 are embedded by the sealing components 420. The openings of the electrodes 430 are sealed to seal both ends of the glass tube 412.

In order to further secure the electrodes 430 at both ends of the glass tube 412, after the electrodes 430 are respectively sleeved at both ends of the glass tube 412, an adhesive 440 is applied to the glass tube 412 and the electrodes 430. Bonding to fix the electrodes 430 to both ends of the glass tube 412, and to prevent leakage of gas filled in the glass tube 412, the adhesive 440 is applied to the glass tube 412 and the electrodes 30. The outer surface. In addition, the adhesive 440 is further applied to the joints of the electrodes 430 and the sealing components 420 to secure the sealing components 420 to the electrodes 430. The adhesive 440 is applied to the electrodes 430. And the outer surface of the sealing assembly 420. The thermal expansion coefficient of the adhesive 440 is between the glass tube 412 and the thermal expansion coefficients of the electrodes 430. When the adhesive 440 is applied to the glass tube 412, the electrodes 430 and the sealing components 420, heat treatment is required, and the temperature is not higher than the softening point of the glass tube 412. The heat treatment is performed before the glass tube 412 is cleaned and the charging mixture is applied to the glass tube 412. Since the two ends of the electrode 430 respectively abut the blocking member 414 of the glass tube 412 and the blocking member 423 of the sealing assembly 420, the adhesive 440 does not flow into the electrode 430 and the glass tube. Within 412, the mixture inside the glass tube 412 is not contaminated and therefore does not affect the useful life of the fluorescent lamp 400. In addition, the fluorescent lamp 400 of the present invention further includes a plurality of conductor layers 450 respectively disposed on the outer surfaces of the electrodes 430. In an embodiment of the invention, the conductive layer 450' may be made of silver or carbon.

Referring to Figures 5A and 5B, which are top and cross-sectional views of a preferred embodiment of the ceramic glass composite electrode of the present invention. As shown, the electrode 430 has an electrode body 435 which is a ceramic glass composite and is a cylinder. Further, it is hollow and has an accommodation space to be disposed at the end of the glass tube 412 of the fluorescent lamp 400 (as shown in Fig. 4A). In addition, the electrode 430 has only an inner diameter, so that the inner portion of the electrode 430 has a cylindrical shape, and the inner diameter of the electrode 430 is slightly larger than the outer diameter of the glass tube 412 to be sleeved at the end of the glass tube 412. Therefore, the electrode 430 of the present invention has a simple structure and is easy to manufacture and thereby increase production efficiency and reduce production cost. When the electrode body 435 is sleeved at the end of the glass tube 412 and the sealing assembly 420, the two ends of the electrode body 435 may abut the blocking member 414 of the glass tube 412 and the blocking member of the sealing assembly 420. 423 (as shown in Figure 4A). The conductor layer 450 shown in Fig. 4A is disposed on the outer surface of the electrode body 435. The material of the electrode 430 of the present invention may be a phosphorous ceramic glass composite having a dielectric constant with superior temperature stability, or may be a ceramic having no phase transition point at - 30 ° C or above. Glass composite. The electrode 430 is formed by a powder injection molding process or a dry stamping process using a ceramic glass composition.

The glass tube 412 of the fluorescent lamp 400 and all the inner side walls of the sealing assembly 420 are coated with a lining except for the electrodes 430. The gas loaded into the fluorescent lamp 400 contains neon (Ne), argon (Ar), and mercury gas. If you do not use mercury gas, you can replace it with xenon (Xe). Prior to loading the gas into the glass tube 412, the glass tube 412 must be emptied by attaching a vacuum pump to both ends of the glass tube 412 as shown in Figure 4A to extract air from the glass tube 412. After that, a gas containing helium, argon, and mercury is filled into the glass tube 412. Then, the sealing components 420 are heat treated, and the original openings of the sealing components 420 are sealed to seal both ends of the glass tube 412.

A preferred embodiment of the ceramic glass composition of the electrodes 430 comprises a cast glass having a high sputter resistance, such as a glass frit. The sputtering is a phenomenon in which the inside of the electrodes 430 of the fluorescent lamp 400 is locally damaged due to an inert element such as an argon cation, mercury ions or electrons striking the inner side walls of the electrodes 430. In one embodiment of the invention, the glass tube 412 is constructed of lead-free glass having a coefficient of thermal expansion similar to that of the ceramic glass composition.

Referring to Figure 6, there is shown a cross-sectional view of a second preferred embodiment of a fluorescent lamp having a ceramic glass composite electrode of the present invention. As shown in the figure, an electrode 460 of the fluorescent lamp 400 of this embodiment has a cup shape, and the electrode 460 is also a ceramic glass composite electrode, which is cylindrical like the electrode 430, and It has only one inner diameter and the inside is straight. The electrode 460 is sleeved at one end of the glass tube 412 and abuts against the blocking member 414 of the glass tube 412. The joint of the electrode 460 and the glass tube 412 is coated with the adhesive 440 for fixing. The electrode 460 is at the end of the glass tube 412 and prevents gas leakage in the glass tube 412, thereby affecting the service life of the fluorescent lamp 400. The electrode 460 of this embodiment is cup-shaped so that one end of the glass tube 412 can be directly sealed without the use of the sealing assembly 420.

According to a specific embodiment of the invention, the materials of the electrodes 430 and 460 have the following composition.

Formula 1

(CaO-MgO-SrO-Zr0 2 -Ti0 2) + A glass frit

The material of the formulation 1 had the composition ratio (samples EC1 to EC6) shown in the following Table 1, and its dielectric constant and dielectric loss were measured at room temperature. The results can be shown in Table 1 below.

Table 1

The glass frit additive of this example used was a lead glass SF-44 for a glass tube. Since the coefficient of thermal expansion is 95 10"7Κ, the coefficient of thermal expansion can be adjusted by adding 0.6 mo l BaO and 0.4 mo l CaO to 1 mo l S i0 ₂ ; or, based on the total of the sample The amount is increased to 0.3 to 10% by weight of the glass frit, which has the same composition as that of the lead-free glass, and then is further added at 1,000 ° C. The components are further synthesized. 3 wt 々MnO and A1 ₂ 0 ₃ .

It can be clearly seen from Table 1 that as the amount of Ti0 ₂ increases, the dielectric constant increases. When the fluorescent lamp is manufactured, when an alternating current having a frequency of 1000 V _rms or more is applied to a ceramic glass composition such as a composition used for the electrode, heat generation is lowered in proportion to the decrease in dielectric loss. 1%。 In this case, the dielectric loss can be reduced to about 0.1% by adding MnO and A1 ₂ 0 ₃ . Further, in order to improve the stability of the fluorescent lamp according to temperature changes, the dielectric constant of the ceramic glass composition should have high temperature stability. The dielectric constant high temperature stability of individual components can be as shown in Figure 7. It can be seen from Fig. 7 that all of the electrode compositions have a stable dielectric constant change from a temperature range of -30 ° C to 250 ° C. Thus, it can be observed that when the dielectric constant is low, the temperature stability is improved. Thereby, it was confirmed that the electrode composition of the first embodiment of the present invention has a dielectric constant higher than that of the general glass, and the dielectric constant thereof exhibits superior temperature stability. The fluorescent lamp of the present invention having a ceramic glass composite electrode is superior in performance to a conventional fluorescent lamp having an external electrode. The comparison results are shown in Table 1 below. The result of this comparison is to compare the fluorescent lamp of the present invention and the conventional fluorescent lamp of the same diameter and the same length. Using a Tektronix high voltage probe and current sensor, the current and voltage applied to both ends of the fluorescent lamp were measured, after which a BM-7A luminance meter was used to measure the brightness. The results can be as shown in Table 2 below.

Table 2

As can be seen from Table 2, the fluorescent lamp of the present invention utilizes the EC1 electrode which is the one having the lowest dielectric constant in the first embodiment, and the fluorescent lamp of the present invention has the same length as the length of the fluorescent lamp. 5倍。 The input power of the fluorescent lamp of the present invention is about 1.7 times. 2倍。 In addition, the brightness of the fluorescent lamp of the present invention is 2.2 times higher than the conventional fluorescent lamp. In addition, since an inverter is used to drive the two fluorescent lamps, the parallel driving of the fluorescent lamps can be realized.

Using different individual ceramic glass composite electrodes, a brightness of 5 degrees depending on the dielectric constant can be determined. The result can be as shown in the following list 3.

table 3

As shown in Table 3, when the input power is the same, the brightness is proportional to the dielectric constant. To describe this relationship more easily, Figure 8 shows the relationship between luminance and dielectric constant.

Further, in order to compare the effects of the fluorescent lamp having the electrode of the first embodiment with the conventional fluorescent lamp having the external electrode, the properties of the fluorescent lamp having the external electrode of the backlight module of a 32-inch TFT-LCD TV can be compared with the fluorescent lamp of the present invention. nature. The results can be as shown in Table 4 below. Table 4

As can be seen from Table 4, the luminance of the fluorescent lamp of the present invention is higher than that of a conventional fluorescent lamp having an external electrode.

As described above, the fluorescent lamp having the ceramic glass composite electrode of the present invention can achieve a high brightness of 3 times or more in parallel driving as compared with the conventional fluorescent lamp having an external electrode.

According to a second embodiment of the present invention, the ceramic glass composite electrode has the following material composition. Formula 1

(CaO-MgO-SrO-Zr0 ₂ -Ti 0 ₂ ) + glass frit B

The material of the formulation 2 had a composition ratio as shown in the following Table 5, and its dielectric constant and dielectric loss were measured at room temperature. The results can be shown in Table 5 below.

table 5

The glass frit additive of this example used borosilicate for the glass tube. Since the coefficient of thermal expansion is 33 x 10-7 K, the composition of the glass frit added to the ceramic glass composition to adjust the coefficient of thermal expansion contains 75 wt. S i0 ₂ , 18 \^/. B ₂ 0 ₃ , 4 ^% Na ₂ 0, 2 wt% K ₂ 0 and 1 wt ° /. A1 ₂ 0 ₃ . The glass frit was synthesized at a temperature of 1100 ° C, and then added according to the total amount of the composition of Table 5 according to the amount of 0. 3-10 wt%. Further, MnO and A1 ₂ 0 ₃ can be used as additives. The amount of the additive can be set to 3 wt%.

The ceramic glass composite electrode has a coefficient of thermal expansion of 36-60 10"7 Κ, which can be gradually decreased in proportion to an increase in the amount of the glass additive. Meanwhile, depending on the type of the glass frit component, The dielectric constant of the examples is different from that of Formulation 1. Table 5 shows the dielectric constant and dielectric loss of each electrode composition when 5 wt% of glass frit B was added. As can be seen from Table 5, the higher the amount of Ti0 ₂ , the higher the dielectric constant. When the fluorescent lamp is manufactured, when an alternating current of 1000 Vrms or more is applied to the ceramic glass composition of the component used in the electrode of the second embodiment of the present invention, heat generation can be reduced in proportion to a decrease in dielectric loss. 1%。 The dielectric loss can be reduced to about 0.1% by increasing MnO and A1 ₂ 0 ₃ .

A fluorescent lamp manufactured by the method of the first embodiment using the ceramic glass composite electrode of the above composition is compared with a conventional fluorescent lamp having an external electrode. The result can be as shown in the following list 6.

Table 6

As can be seen from Table 6, the luminance of the fluorescent lamp constituted by the ceramic glass composite electrode of the second embodiment is at least 3 times that of the conventional fluorescent lamp having the external electrode, and the parallel driving process can be realized. When borosilicate is used as the glass tube of the fluorescent lamp, the glass component of the ceramic glass composition can be controlled to adjust the thermal expansion coefficient. In this manner, when the glass tube and the fluorescent lamp are sealed by heat treatment using the glass sealing material, failure due to a difference in thermal expansion coefficient can be prevented, and brightness can be further improved.

For a more detailed understanding of the reason for the increase in brightness of the fluorescent lamp of the present invention, the polarities of the electrodes of the respective constituent components of Table 1 were measured, and the polarity was determined depending on the electric field applied to the electrodes. Results As shown in Fig. 9, Fig. 9 shows a hysteresis curve of the relationship between the electric field applied to the electrodes and the polarity of the electrodes. The hysteresis % can be determined by the hysteresis curve shown in Fig. 9. When the hysteresis loss increases, the heat loss under the alternating electric field increases. Therefore, stable driving processing can be realized when the hysteresis loss is low. The present invention determines the hysteresis loss using the following equation.

That is, as shown in Fig. 10, the maximum polarity at 10 kV/mm is expressed as Pmax, and the difference in polarity at 0 kV/mm is expressed as Δ Ρ, and the hysteresis loss can be expressed as follows.

Hysteresis loss (%) = AP/P _max X 100

According to the above equation, the data of Fig. 10 is used to determine the hysteresis loss. The results can be listed as follows 7 is shown.

Table 7

From these results, it is known that the fluorescent lamp of the present invention exhibits a relatively stable hysteresis loss at a high electric field of 10 kV/mm as compared with the conventional glass electrode.

Therefore, the fluorescent lamp having the ceramic glass composite electrode of the present invention is characterized in that ions or electrons appearing in the fluorescent lamp are at least twice as large as when the same electric field is applied, compared to a conventional fluorescent lamp having only an external electrode composed of glass. The amount is charged or discharged. Further, the fluorescent lamp of the present invention having a low hysteresis loss can provide light at a stable temperature at a high voltage as compared with a conventional fluorescent lamp having an external electrode composed entirely of glass. 031μ(7 η ² The maximum value of the polarity of the glass is 0. 031μ(7 η ^{2 )} . The maximum value of the polarity of the glass is 0. 031μ(7 η ² And the polarity curve has a linear dependence on the electric field change.

In the above embodiment, the MgO-SrO component may be replaced with an oxide having a difference of 15% or less in the ionic radius. An example of an alternative oxide can be found in Table 8 below.

Table 8

In summary, the present invention is a ceramic glass composite electrode and a fluorescent lamp thereof, and the ceramic glass composite electrode is a ceramic glass composite which is disposed at the end of the glass tube of the fluorescent lamp, the glass tube The end is provided with a blocking member for abutting against the ceramic glass composite electrode to limit the position of the ceramic glass composite electrode to the glass tube, and to prevent the adhesive from flowing into the glass tube when the glass tube and the ceramic glass composite electrode are bonded, thereby improving The life of fluorescent lamps. The ceramic glass composite electrode of the present invention comprises an electrode body which is disposed at the end of the glass tube of the fluorescent lamp and which is a cylinder, and the cylinder has only an inner diameter.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. The skilled person can make some modifications or modifications to the equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. It is still within the scope of the technical solution of the present invention to make any simple modifications, equivalent changes and modifications to the above embodiments.

Claims

Rights request

1. A fluorescent lamp having a ceramic glass composite electrode, characterized in that it comprises: a glass tube;

At least one blocking member disposed at at least one end of the glass tube;

A plurality of ceramic glass composite electrodes are respectively disposed at both ends of the glass tube and are opposed to the blocking member of the glass tube, and the ceramic glass composite electrodes are a ceramic glass composite.

2. A fluorescent lamp having a ceramic glass composite electrode according to claim 1, wherein the ceramic glass composite electrodes are a cylinder and have only one inner diameter, and the interiors of the ceramic glass composite electrodes are in a straight cylindrical shape.

3. A fluorescent lamp having a ceramic glass composite electrode according to claim 1, further comprising:

A plurality of conductor layers are respectively disposed on outer surfaces of the ceramic glass composite electrodes.

4. A fluorescent lamp having a ceramic glass composite electrode according to claim 1, further comprising:

A plurality of sealing components are respectively disposed at the ends of the ceramic glass composite electrodes.

A fluorescent lamp having a ceramic glass composite electrode according to claim 4, wherein the sealing members each have a blocking member against the end of the ceramic glass composite electrode.

6. A fluorescent lamp having a ceramic glass composite electrode according to claim 1, wherein said barrier member is a projection and is annular.

7. A ceramic glass composite electrode, characterized in that it comprises:

An electrode body is disposed at one end of a glass tube of a fluorescent lamp and is a cylinder and is a ceramic glass composite having only an inner diameter.

8. The ceramic glass composite electrode according to claim 7, further comprising: a conductor layer disposed on an outer surface of the electrode body.

The ceramic glass composite electrode according to claim 7, wherein the inside of the electrode body has a straight cylindrical shape.

A fluorescent lamp having a ceramic glass composite electrode according to claim 7, wherein said electrode body abuts against a stopper located at an end of the glass tube.