JP5684408B2 - Ceramic glass synthetic electrode and its fluorescent lamp - Google Patents

Description

  The present invention relates to a kind of electrode and fluorescent lamp, and in particular, refers to a ceramic glass synthetic electrode and its fluorescent lamp, and prevents the adhesive from entering the glass tube of the fluorescent lamp, thereby extending the service life of the fluorescent lamp. Refers to an extension.

  Please refer to FIG. It is a cross-sectional view of a traditional cold cathode fluorescent lamp of a TFT-LCD backlight module. The fluorescent lamp 100 includes a glass tube 120, which includes a pair of cup-shaped metal electrodes 110 inserted into both ends of the glass tube 120, and two lead wires 130 each of the two metal electrodes 110. It is connected to the. When the fluorescent lamp 100 is manufactured, the fluorescent lamp 100 is depressurized to a certain vacuum level, and main electrons that appear naturally by cosmic radiation can appear therein. During the manufacturing process of the fluorescent lamp 100, after reducing the pressure, the fluorescent lamp 100 is filled with a neon-argon (Ne-Ar) gas 150 at a pressure of 50 torr or more. When high-voltage AC power 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, thereby ionizing the neon-argon gas 150. As this ionization proceeds, a spark plasma can be formed, of which positive ions 160 and negative electrons 140 are jointly present. The positive ions 160 and the electrons 140 collide with the two metal electrodes 110 and are thereby neutralized. Under this circumstance, secondary electrons are generated from the two metal electrodes 110 due to the collision, thereby enabling continuous discharge. Thus, the generation of secondary electrons is an important factor in continuous light emission. If secondary electron emission can be promoted, high brightness can be maintained.

  When the electrons 140 collide with neutral mercury atoms 170, the mercury atoms 170 are excited. The excited mercury atoms 170 can emit ultraviolet light 180 when returning to ground. The ultraviolet light 180 enters the fluorescent material 190 applied to the inner wall of the glass tube 120 and is converted into visible light 181 by this. Thereby, the electron 140 or the cation 160 collides with the metal electrode 110, and sputtering is generated in the metal electrode 110 portion. Mercury atoms 170 adhere to the metal electrode parts that have undergone sputtering and scattering, thereby forming a composite. When this composite is deposited near the metal electrode 110, a darkening phenomenon may appear, which may form a shortened life of the fluorescent lamp 100. Therefore, shortening the lifetime is a serious problem for the fluorescent lamp 100.

  Several solutions have already been submitted to overcome this problem. (1) Based on excitation and ionization of neon-argon gas 150 filled in the fluorescent lamp 100, a method of lowering the discharge start voltage using the penny effect, thus electrons 140 colliding with these metal electrodes 110 or The pulses of positive ions 160 are reduced, thereby reducing the occurrence of sputtering. (2) A method of reducing the discharge start voltage by reducing the gas pressure as much as possible. However, when the discharge start voltage is low, the kinetic energy of the cations 160 or electrons 140 that collide with the metal electrode 110 is reduced, reducing the emission of secondary electrons from the metal electrode 110, and thus the luminance of the fluorescent lamp 100 is attenuated. Can bring

  In order to overcome this problem, another type of method is currently being submitted, which selectively employs a material with low work performance to manufacture the metal electrode 110, thus assisting the electron supply of the metal electrode 110. . However, this scheme can increase manufacturing costs because the price of such materials is high. In addition, this method further requires the use of expensive borosilicate glass as the material of the glass tube 120, thereby adjusting the thermal expansion coefficient of the glass tube 120 and the lead wire 130. Since the fluorescent lamp 100 has a low impedance, so that its impedance component can be clearly high, a transformer can drive only one fluorescent lamp 100, increasing the total manufacturing cost. In addition, the diameter of the glass tube 120 is increased, thereby greatly reducing the luminance, and the mechanical strength of the fluorescent lamp 100 is relatively weak. Thereby, it is not easy to use the above-described fluorescent lamp 100 for a large television that requires a fluorescent lamp having a large diameter (tube diameter of 4 mm or more) as a backlight.

  In order to solve this problem, fluorescent lamps having external electrodes have already been developed. As shown in FIG. 2, the conductor layers 221 are respectively installed on the outer surfaces of both ends of the glass tube 210, or Alternatively, it is fitted into the metal cover cap 220 and contacts the metal cover cap 220. In the fluorescent lamp 200 having the external electrode in FIG. 2, the fluorescent material is applied to the inner surface of the glass tube 210, and both ends thereof are sealed. The interior space of the glass tube 210 is filled with a mixture containing a charged gas, which includes, for example, an inert gas including argon (Ar) or neon (Ne) and a mercury (Hg) gas. The conductor layer 221 has various shapes and is disposed on the outer surface portions at both ends of the glass tube 210, which can be silver or carbon. In addition, a metal cover cap 220 is installed at each end of the glass tube 210.

  When a high-voltage AC power supply (AC) is applied to the conductor layer 221, both ends of the glass tube 210 contacting the metal cover cap 220 serve as a dielectric material and generate a strong induction electric field. More specifically, when the polarization of the voltage applied to the metal cover cap 220 is positive, electrons accumulate in the glass tube 210 in contact with the conductor layer 221. On the other hand, when the voltage polarization is negative, that is, cations accumulate in the glass tube 210 in contact with the conductor layer 221. Due to the continuous polarization conversion of the electric field of the AC power supply, the charges accumulated on the side walls at both ends of the glass tube 210 can be interchanged between the opposite ends of the glass tube 210. Thus, hydrogen atoms are excited when the side wall charges collide with the mercury gas supplied with the inert gas. Thereafter, the ultraviolet light generated during the excitation process excites the fluorescent material applied to the inner side wall of the glass tube 210, thereby emitting visible light.

  In the traditional fluorescent lamp 200 having external electrodes, the areas of both end portions of the glass tube 210 are made of dielectric material and the conductor layer 221 is installed, so that the end areas can be enlarged, , The magnitude of the side wall charge can be increased, thereby increasing the brightness of the fluorescent lamp 200. However, the conductor layer 221 has a limitation in the longitudinal extension, so that the emitted light can be reduced in the extension part of the conductor layer 221 in the longitudinal direction, thereby reducing the luminous efficiency. To do.

  Based on the above-mentioned drawbacks, the “fluorescent lamp with ceramic glass composite electrode” described in Patent Document 1 presents a kind of ceramic glass composite electrode, which is a composite of ceramic and glass, It has a relatively high dielectric constant, a relatively high secondary electron emission efficiency, and a relatively high polarization under the same electric field, thereby moving more electrons and cations to increase the brightness of the fluorescent lamp. Can be up. As shown in FIG. 3, the ceramic glass composite electrode 300 has a hollow cylindrical shape and is installed at both ends of the glass tube. The ceramic glass composite electrode 300 has two inner diameters 310 and 313, and the two The inner diameters 310 and 313 are not the same, and the inner diameter 310 is smaller than the inner diameter 313. Therefore, the inside of the ceramic glass composite electrode 300 has a stepped shape, and the inner diameter 313 is slightly larger than the outer diameter of the glass tube. The synthetic electrode 300 can be fitted to the end of the glass tube, and the inner diameter 310 is smaller than the outer diameter of the glass tube.

  Before the ceramic glass composite electrode 300 is fitted into the glass tube, an adhesive must be applied to the outer surface of the end of the glass tube, and then further the ceramic glass composite electrode 300 is applied to the end of the glass tube. The ceramic glass composite electrode 300 is fixed to the end of the glass tube by being fitted. However, the amount of the agent applied to the outer surface of the glass tube is not easy to control, and therefore the adhesive tends to be overcoated or undercoated on the outer surface of the glass tube, and if the adhesive is too small, If the ceramic glass composite electrode 300 cannot be securely fixed to the end of the glass tube and there is too much adhesive, it overflows into the glass tube, thereby contaminating the mixed gas in the glass tube, and the luminous efficiency of the fluorescent lamp. The service life will be affected. In addition, the inner diameter of the ceramic glass composite electrode 300 is not the same, and therefore has a certain difficulty in manufacturing, which increases the complexity and cost of the manufacturing process. Thus, how to prevent the adhesive from flowing into the glass tube when the ceramic glass composite electrode 300 is fitted to the end of the glass tube is an important issue at present.

  Accordingly, the present invention provides a kind of ceramic glass synthetic electrode and its fluorescent lamp to solve the above-mentioned problems, and improves the above-mentioned disadvantages of the known technology, and extends the service life of the fluorescent lamp. Solve a problem.

Taiwan Patent Publication No. 200842928

  One of the objects of the present invention is to provide a kind of ceramic glass composite electrode, which is a hollow cylinder and has the same inner diameter, so its structure is simple and convenient to manufacture and lowers the manufacturing cost. Achieve the goal.

  One of the objects of the present invention is to provide a kind of fluorescent lamp having a ceramic glass composite electrode, the end of the glass tube having a stopper, and the stopper is provided with the ceramic glass composite electrode at the end of the glass tube. The ceramic glass composite electrode abuts the ceramic glass composite electrode to limit the position of the ceramic glass composite electrode in the glass tube, and the adhesive flows into the glass tube when bonding the glass tube and the ceramic glass composite electrode. To prevent the fluorescent lamp from affecting the service life.

In fluorescent lamps with ceramic glass composite electrodes,
A glass tube,
At least one stopper installed at at least one end of the glass tube;
A plurality of ceramic glass composite electrodes, each of which is installed at both ends of the glass tube and abuts against the stopper of the glass tube, and the ceramic glass composite electrodes are ceramic glass composites. A glass synthetic electrode;
Is included.
In a fluorescent lamp provided with a ceramic glass synthetic electrode, these ceramic glass synthetic electrodes are cylindrical and have only one inner diameter, and the inside of these ceramic glass synthetic electrodes has a straight cylindrical shape.
In a fluorescent lamp equipped with a ceramic glass composite electrode,
Each includes a plurality of conductor layers installed on the outer surface of the ceramic glass composite electrode.
In a fluorescent lamp equipped with a ceramic glass composite electrode,
It includes a plurality of sealing parts, each installed at the end of these ceramic glass composite electrodes.
In a fluorescent lamp provided with a ceramic glass composite electrode, each of these sealing parts has a stopper, and abuts against the end of the ceramic glass composite electrode by the stopper.
In a fluorescent lamp provided with a ceramic glass synthetic electrode, the stopper is convex and has an annular shape.
In ceramic glass composite electrode,
An electrode body, which is provided at the end of a glass tube of a fluorescent lamp and is a cylinder made of a ceramic glass composition, which includes the electrode body having only one inner diameter.
In the ceramic glass composite electrode,
It includes a conductor layer provided on the outer surface of the electrode body.
In the ceramic glass synthetic electrode, the inside of the electrode body has a straight cylindrical shape.
In the ceramic glass composite electrode, the electrode body abuts against a stopper located at the end of the glass tube.

  The fluorescent lamp provided with the ceramic glass composite electrode of the present invention includes a glass tube, at least one stopper, and a plurality of ceramic glass composite electrodes, and the stopper is disposed at at least one end of the glass tube. Are placed at both ends of the glass tube and contact the stopper of the glass tube to restrict the position of the ceramic glass composite electrode in the glass tube and prevent the adhesive from flowing into the glass tube. The service life of the lamp is extended. The ceramic glass composite electrode of the present invention is formed into a cylinder and a ceramic glass composite, and the cylinder has only one inner diameter, the structure is simple and convenient for manufacturing production, and the manufacturing cost is reduced. Can do.

  In summary, the present invention is a kind of ceramic glass composite electrode and its fluorescent lamp, which is a ceramic glass composite, which is installed at the end of the glass tube of the fluorescent lamp, thereby Limiting the fitting position in the glass tube and preventing the adhesive from flowing into the glass tube when bonding the glass tube and the ceramic glass composite electrode, thus extending the service life of the fluorescent lamp.

It is sectional drawing of the traditional cold cathode fluorescent lamp of the backlight module of TFT-LCD. It is sectional drawing of the fluorescent lamp provided with the traditional external electrode. It is sectional drawing of a known ceramic glass synthetic electrode. It is sectional drawing of the preferable Example of the fluorescent lamp provided with the ceramic glass synthetic electrode of this invention. It is sectional drawing of the preferable Example of the fluorescent lamp provided with the ceramic glass synthetic electrode of this invention. It is a top view of the preferable Example of the ceramic glass synthetic electrode of this invention. It is sectional drawing of the preferable Example of the ceramic glass synthetic electrode of this invention. It is sectional drawing of the 2nd preferable Example of the fluorescent lamp provided with the ceramic glass synthetic electrode of this invention. It is a dielectric constant-temperature curve figure of a preferable Example of this invention. It is a brightness | luminance-dielectric constant curve figure of preferable Example of this invention. It is a polarization-electric field curve diagram of a preferred embodiment of the present invention. It is a polarization-electric field curve diagram of a preferred embodiment of the present invention.

  The technical contents, structural features, objects to be achieved, and operational effects of the present invention will be described in detail below with reference to examples and drawings.

  See FIGS. 4A and 4B. It is a cross-sectional view of a first embodiment of a fluorescent lamp comprising the ceramic glass composite electrode of the present invention. As shown in the figure, the fluorescent lamp 400 of the present invention includes a glass tube 412, a plurality of seal parts 420, and a plurality of electrodes 430. The glass tube 412 has an internal space, and the internal space is filled with a mixture of inert gas and metal vapor (not shown). In addition, a fluorescent material is applied to the inner surface of the glass tube 412. The glass tube 412 may have a tube shape, a U shape, or a rectangular shape. 4A and 4B, the glass tube 412 has a tubular shape. The glass tube 412 can be formed of borosilicate glass, lead-free glass, or quartz glass. In addition, both ends of the glass tube 412 of the present invention are each provided with a stopper 414. In one embodiment of the present invention, these stoppers 414 are protrusions and have an annular shape.

  These electrodes 430 are all ceramic glass composite electrodes, which include ceramic glass composites and have characteristics such as high dielectric constant and high secondary electron emission efficiency. These electrodes 430 are respectively fitted to both ends of the glass tube 412, and one end of each of the electrodes 430 comes into contact with the stopper 414 located at both ends of the glass tube 412. Thus, the stoppers 414 are used to limit the position of the electrodes 430 in the glass tube 412, that is, limit the length of the glass tube 412 entering the electrodes 430. These seal parts 420 are respectively installed at the other ends of these electrodes 430, and one end of each of these seal parts 420 is provided with a stopper 423, and is used to stop the ends of these electrodes 430, and thereby these electrodes 430. The position of the sealing part 420 in the electrode 430 is limited, that is, the length of the sealing part 420 in the electrode 430 is limited. In one embodiment of the present invention, the stoppers 423 are protrusions and have an annular shape. As shown in FIG. 4B, after the filling of the glass tube 412 with the mixture is completed, the sealing parts 420 are heat-treated to seal the openings of the sealing parts 420, and the sealing parts 420 become the electrodes. By sealing the opening of 430, both ends of the glass tube 412 are sealed.

  In order to more firmly fix these electrodes 430 to both ends of the glass tube 412, after the electrodes 430 are fitted to both ends of the glass tube 412, the adhesive 440 is used to attach the glass tube 412 and the electrodes 430, respectively. The electrode 430 is fixed to both ends of the glass tube 412 and is prevented from leaking the gas filled in the glass tube 412 thereafter. The tube 412 and the outer surfaces of these electrodes 430 are applied. In addition, the adhesive 440 is further applied to the joint portion between the electrodes 430 and the seal parts 420, so that the seal parts 420 are fixed to the electrodes 430. The adhesive 440 is bonded to the electrodes 430 and the seals. It is applied to the outer surface of the part 420. The thermal expansion coefficient of the adhesive 440 is between the thermal expansion coefficients of the glass tube 412 and the electrodes 430. When the adhesive 440 is applied to the glass tube 412, the electrodes 430 and the seal parts 420, it is necessary to perform a heat treatment, and the temperature is not higher than the softening point of the glass tube 412. The heat treatment is performed before decompression of the glass tube 412 and filling of the mixture into the glass tube 412.

  As a result, both ends of the electrode 430 are respectively abutted by the stopper 414 of the glass tube 412 and the stopper 423 of the seal part 420, so that the adhesive 440 flows into the electrode 430 and the glass tube 412. Without contaminating the mixture inside the glass tube 412, thereby not affecting the service life of the fluorescent lamp 400. In addition, the fluorescent lamp 400 of the present invention further includes a plurality of conductor layers 450 that are respectively disposed on the outer surfaces of the electrodes 430. In some embodiments of the present invention, the material of these conductor layers 450 is silver or carbon.

  See FIGS. 5A and 5B. It is the top view and sectional drawing of the preferable Example of the ceramic glass synthetic electrode of this invention. As shown, the electrode 430 comprises an electrode body 435, which is a ceramic glass composite and a cylinder. In addition, it is hollow and has a receiving space and is installed at the end of the glass tube 412 of the fluorescent lamp 400 (as shown in FIG. 4A). In addition, the electrode 430 has a slight inner diameter. Therefore, the inside of the electrode 430 has a straight cylindrical shape, and the inner diameter of the electrode 430 is slightly larger than the outer diameter of the glass tube 412, thereby the glass tube. 412 is fitted to the end. As a result, the structure of the electrode 430 of the present invention is simple and convenient for manufacturing and production. Therefore, the production efficiency can be increased and the production cost can be reduced. When the electrode body 435 is fitted to the end of the glass tube 412 and the seal part 420, both ends of the electrode body 435 are connected to the stopper 414 of the glass tube 412 and the stopper 423 of the seal part 420. Stopped (as shown in FIG. 4A). That is, the conductor layer 450 shown in FIG. 4A is placed on the outer surface of the electrode body 435. The material of the electrode 430 of the present invention can be a phosphor ceramic glass composite, and its dielectric constant has relatively good temperature stability, or has a glass transition temperature of -30 degrees Celsius or higher. Not a ceramic glass composite. The electrode 430 is formed by a powder injection molding process or a dry pressing process using a ceramic glass composite.

  Except for these electrodes 430, a fluorescent material is applied to all the inner side walls of the glass tube 412 and the sealing component 420 of the fluorescent lamp 400. The gas filled in the fluorescent lamp 400 includes neon (Ne), argon (Ar), and mercury gas. If it is not mercury gas, xenon gas (Xe) can be used instead. Before the glass tube 412 is filled with gas, it is necessary to depressurize the glass tube 412 first. The depressurization method is such that a vacuum pump is connected to both ends of the glass tube 412 as shown in FIG. 4A. Then, the air in the glass tube 412 is extracted. Thereafter, the glass tube 412 is filled with a gas containing neon, argon and mercury. Subsequently, heat treatment is performed on the seal parts 420 to seal the openings of the seal parts 420, and thus seal both ends of the glass tube 412.

  A preferred embodiment of the ceramic glass composite of these electrodes 430 is a fused mold glass having a high sputtering resistance, such as a glass melt material. Sputtering is a phenomenon of local damage inside these electrodes 430 of the fluorescent lamp 400, which is formed by collision of inert elements such as argon cations, mercury ions, or electrons with the inner side walls of these electrodes 430. Is done. In one embodiment of the present invention, the glass tube 412 is formed of lead-free glass having a thermal expansion coefficient similar to that of the ceramic glass composite.

  See FIG. It is a cross-sectional view of a second preferred embodiment of a fluorescent lamp comprising the ceramic glass composite electrode of the present invention. As shown, one electrode 460 of the fluorescent lamp 400 of this embodiment has a cup shape, the electrode 460 is also a ceramic glass composite electrode, which is a cylinder similar to the electrode 430, and one electrode. It has only one inner diameter and has a straight cylindrical shape inside. The electrode 460 is fitted to one end of the glass tube 412 and abuts against the stopper 414 of the glass tube 412, and the adhesive 440 is applied to a joint portion between the electrode 460 and the glass tube 412. The electrode 460 is fixed to the end of the glass tube 412 and prevents the leakage of gas in the glass tube 412 from affecting the service life of the fluorescent lamp 400. The electrode 460 in this embodiment has a cup shape, and thus can directly seal one end of the glass tube 412 without the need to use the sealing component 420.

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

Compounding material 1
_{(CaO- MgO- SrO- ZrO 2 -TiO 2} ) + molten glass material A

  The material of Compounding Material 1 had a composition component ratio (samples EC1 to EC6) shown in Table 1 below, and its dielectric constant and dielectric loss were measured at room temperature. The results are as shown in Table 1 below.

It is lead-free glass SF-44 used for a glass tube that is used for the molten glass material additive of this embodiment. The coefficient of thermal expansion is 95 × 10 ⁻⁷ / K, and 0.6 mol of BaO and 0.4 mol of CaO are added to 1 mol of SiO ₂ to adjust the coefficient of thermal expansion. Alternatively, 0.3 to 10 wt% of molten glass material is added based on the total amount of the sample, which has the same compositional components as lead-free glass, and then synthesizes these components at 1000 degrees Celsius. Thereby, 3 wt% of MnO and Al ₂ O ₃ are further added.

As can be clearly seen from Table 1, the dielectric constant increases as the proportion of TiO ₂ increases. When the fluorescent lamp is manufactured, if an AC power supply of 1000 V _rms or more is applied to the ceramic glass composition of the composition used for the electrode, the heat generation is reduced in direct proportion to the reduction of the dielectric loss. In this situation, the dielectric loss is reduced to about 0.1% by the addition of MnO and Al ₂ O ₃ . In addition, the dielectric constant of the ceramic glass composite should have high temperature stability in order to enhance the stability based on temperature changes of the fluorescent lamp. The high temperature stability of the dielectric constant of the individual composition components is as shown in FIG. As can be seen from FIG. 7, all electrode composition components have stable dielectric constant changes within a temperature range of minus 30 degrees Celsius to 250 degrees Celsius. Thus, it is observed that the temperature stability increases when the dielectric constant is low. As a result, the electrode composition component of the first embodiment of the present invention has a higher dielectric constant than that of ordinary glass, and the dielectric constant exhibits relatively excellent temperature stability.

  The performance of the fluorescent lamp provided with the ceramic glass composite electrode of the present invention is superior to the fluorescent lamp provided with the traditional external electrode. The comparison results are as shown in Table 2 below. This comparison result is a comparison between the fluorescent lamp of the present invention having the same diameter and the same length and the traditional fluorescent lamp. Using a Tektronix high voltage probe and current sensor, the current and voltage applied to both ends of the fluorescent lamp were measured, and then the luminance was measured using a BM-7A luminance meter. The results are as shown in Table 2 below.

  As can be seen from Table 2, the fluorescent lamp of the present invention uses the EC1 electrode, and this EC1 electrode is the electrode having the lowest dielectric constant in the first embodiment. The length is the same as that of traditional fluorescent lamps. The input power of the traditional fluorescent lamp is 9 watts, and the input power of the fluorescent lamp of the present invention is 16 watts, which increases about 1.7 times. In addition, the brightness of the fluorescent lamp of the present invention is 4.2 times that of the traditional fluorescent lamp. In addition, two fluorescent lamps are driven using an inverter, and thereby, parallel driving of the fluorescent lamps can be realized.

  Different individual ceramic glass composite electrodes can be utilized to determine varying brightness based on the dielectric constant. The results are as shown in Table 3 below.

  As can be seen from Table 3, when the input power is the same, the luminance is directly proportional to the dielectric constant. Further, in order to briefly explain this relationship, FIG. 8 shows a relationship between luminance and dielectric constant.

  In addition, in order to compare the effect of the fluorescent lamp of the electrode of the first embodiment and the traditional fluorescent lamp, the nature of the fluorescent lamp having the external electrode of the backlight module of the 32-inch TFT-LCD TV and the fluorescent lamp of the present invention. The properties of the lights were compared. The results are as shown in Table 4 below.

  As can be seen from Table 4, the brightness of the fluorescent lamp of the present invention is higher than that of a fluorescent lamp with a traditional external electrode.

  As described above, when compared with a fluorescent lamp having a conventional external electrode, the fluorescent lamp having the ceramic glass composite electrode of the present invention can achieve a brightness of three times or more when driven in parallel.

  According to a second embodiment of the present invention, the ceramic glass composite electrode has the material composition components listed below.

Compounding material 2
_{(CaO- MgO- SrO- ZrO 2 -TiO 2} ) + molten glass material B

  The material of this compounding material 2 has a composition component ratio shown in Table 5 below, and its dielectric constant and dielectric loss were measured at room temperature. The results are as shown in Table 5 below.

The molten glass material additive used in this example is borosilicate glass used in glass tubes. The coefficient of thermal expansion is 33 × 10 ⁻⁷ / K, and the components for adjusting the coefficient of thermal expansion in addition to the ceramic glass composition are 75 wt% SiO ₂ , 18 wt% B ₂ O ₃ , Includes 4 wt% Na ₂ O, 2 wt% K ₂ O and 1 wt% Al ₂ O ₃ . This molten glass material is synthesized at 1100 degrees Celsius, and then an amount of 0.3 to 10 wt% is added according to the total amount of the composition components shown in Table 5. In addition, MnO and Al ₂ O ₃ can be used as additives. The amount of the additive can be set to 3 wt%.

The thermal expansion coefficient of the ceramic glass composite electrode is 36 to 60 × 10 ⁻⁷ / K, and this gradually decreases as the amount of the glass additive increases. At the same time, the dielectric constant of this embodiment differs from the dielectric constant of compounding material 1 based on the type of molten glass material component. Table 5 shows the dielectric constant and dielectric loss of each electrode composition component when 5 wt% of molten glass material B is increased. As can be seen from Table 5, the dielectric constant increases as the proportion of TiO ₂ increases. When the fluorescent lamp is manufactured, if an AC power supply of 1000 V _rms or more is applied to the ceramic glass composition of the composition used for the electrode, the heat generation is reduced in direct proportion to the reduction of the dielectric loss. Thus, the dielectric loss can be reduced to about 0.1% by increasing MnO and Al ₂ O ₃ .

  Using the ceramic glass synthetic electrode having the above-described composition component, a fluorescent lamp was manufactured by the method in the first embodiment, and its performance was compared with that of a fluorescent lamp having a traditional external electrode. The results are as shown in Table 6 below.

  As can be seen from Table 6, the brightness of the fluorescent lamp composed of the ceramic glass composite electrode of the second embodiment has a brightness at least three times that of the fluorescent lamp with the traditional external electrode, and parallel drive processing. Can be realized. In a situation where borosilicate glass is used for the glass tube of the fluorescent lamp, the thermal expansion coefficient can be adjusted by controlling the glass component of the ceramic glass composition. In this way, when the glass sealing material is heat-treated to seal the glass tube and the fluorescent lamp, it is possible to prevent the expiration from being formed due to the difference in thermal expansion coefficient, and to further increase the brightness.

  In order to understand the cause of the increase in the luminance of the fluorescent lamp of the present invention in more detail, the measurement is performed on the polarization of the electrode of each composition component in Table 1, and the polarization can be determined by the electric field applied to the electrode. . The result is as shown in FIG. 9, which is a magnetic hysteresis curve of the relationship between the electric field applied to the electrode and the polarization of the electrode. The magnetic hysteresis% can be determined from the magnetic hysteresis curve shown in FIG. As the magnetic hysteresis loss increases, the heat loss under AC power field can be high. Therefore, stable drive processing can be realized when the magnetic hysteresis loss is relatively low. The present invention uses the following formula to determine the magnetic hysteresis loss.

  That is, as shown in FIG. 10, the maximum polarization at 10 kV / mm is indicated as Pmax, and the polarization difference at 0 kV / mm is indicated as ΔP, that is, the magnetic hysteresis loss is indicated as follows: Can be done.

Magnetic hysteresis loss (%) = ΔP / P _max × 100

  Based on the above formula, the magnetic hysteresis loss is determined using the data of FIG. The results are as shown in Table 7 below.

  As can be seen from these results, the fluorescent lamp of the present invention exhibits stable magnetic hysteresis loss under a high electric field of 10 kV / mm as compared with the traditional glass electrode.

Thus, compared to a fluorescent lamp having a traditional external electrode formed only of glass, the fluorescent lamp having the ceramic glass composite electrode of the present invention is characterized by the fact that the same fluorescent lamp is applied when the same electric field is applied. The ions or electrons that appear inside are charged or discharged at least twice as much. In addition, the fluorescent lamp of the present invention having a low magnetic hysteresis loss provides a light beam at a stable temperature under a high voltage as compared with a fluorescent lamp having a conventional external electrode formed of glass alone. The ceramic glass composition of the present invention has a polarization value, the polarization value is higher than the polarization value of the glass, and the polarization value of the glass has a maximum polarization value of 0.031 μC / cm ² under an electric field of 10 kV, In addition, the polarization curve and the electric field change have linear dependence.

  In the above-described embodiment, an oxide having a difference of 15% or less on the ionic radius can be used in place of the MnO-SrO component. Examples of alternative oxides are as shown in Table 8 below.

  In summary, the present invention is a kind of ceramic glass composite electrode and its fluorescent lamp, which is a ceramic glass composite, which is installed at the end of the glass tube of the fluorescent lamp, thereby Limiting the fitting position in the glass tube and preventing the adhesive from flowing into the glass tube when bonding the glass tube and the ceramic glass composite electrode, thus extending the service life of the fluorescent lamp. The ceramic glass composite electrode of the present invention includes an electrode body, which is provided at the end of a glass tube of a fluorescent lamp and is a cylinder, the cylinder having only one inner diameter.

  The foregoing is only a description of the preferred embodiment of the present invention, and is not intended to limit the present invention. Other equivalent effect modifications or substitutions that may be accomplished without departing from the spirit of the present invention are not Are also within the scope of the claims of the present invention.

100 Cold Cathode Fluorescent Lamp 110 Metal Electrode 120 Glass Tube 130 Lead Wire 140 Electron 150 Ne-Ar Gas 160 Cation 170 Mercury Atom 180 Ultraviolet Light 181 Visible Light 190 Fluorescent Material 200 External Electrode Fluorescent Lamp 210 Glass Tube 220 Metal Cover Cap 221 Conductor Layer 300 Composite electrode 310 Inner diameter 313 Inner diameter 400 Fluorescent lamp 412 Glass tube 414 Stopper 420 Sealing part 423 Stopper 430 Electrode 435 Electrode body 440 Adhesive 450 Conductive layer 460 Electrode

Claims (8)

In fluorescent lamps with ceramic glass composite electrodes,
A glass tube,
At least one stopper which is a convex and is annularly disposed at at least one end of the glass tube;
A plurality of ceramic glass composite electrodes, each of which is installed at both ends of the glass tube and abuts against the stopper of the glass tube, and the ceramic glass composite electrodes are ceramic glass composites. A glass synthetic electrode;
A fluorescent lamp comprising a ceramic glass synthetic electrode.   2. A fluorescent lamp comprising the ceramic glass synthetic electrode according to claim 1, wherein the ceramic glass synthetic electrode is a cylinder and has only one inner diameter, and the inside of the ceramic glass synthetic electrode has a straight cylindrical shape. A fluorescent lamp comprising a ceramic glass synthetic electrode. In the fluorescent lamp comprising the ceramic glass synthetic electrode according to claim 1,
A fluorescent lamp provided with a ceramic glass composite electrode, characterized in that it includes a plurality of conductor layers installed on the outer surface of each ceramic glass composite electrode. In the fluorescent lamp comprising the ceramic glass synthetic electrode according to claim 1,
A fluorescent lamp provided with a ceramic glass composite electrode, comprising a plurality of sealing parts respectively installed at the ends of these ceramic glass composite electrodes.   5. The fluorescent lamp comprising the ceramic glass composite electrode according to claim 4, wherein each of the sealing parts includes a stopper, and the stopper is brought into contact with the end of the ceramic glass composite electrode. Fluorescent lamp. In ceramic glass composite electrode,
An electrode body, which is provided at the end of a glass tube of a fluorescent lamp, and is a cylinder and is a ceramic glass composite, the cylinder having only one inner diameter;
At least one stopper located at the end of the glass tube, abutting against the electrode body, being convex and exhibiting an annular shape;
A ceramic glass synthetic electrode comprising: The ceramic glass composite electrode according to claim 6, further comprising:
A ceramic glass composite electrode comprising a conductor layer provided on an outer surface of the electrode body. The ceramic glass composite electrode according to claim 6, wherein the inside of the electrode body has a straight cylindrical shape.

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