JP3554681B2 - Fluorescent lamp - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a fluorescent lamp used for illuminating a document in information equipment such as a facsimile, a copying machine, and an image reader, or used as a backlight of a liquid crystal panel display.
[0002]
[Prior art]
Conventionally, as a fluorescent lamp used in this field, for example, a lamp in which a pair of band-shaped electrodes is disposed on the outer surface of a glass tube as disclosed in Japanese Patent Application Laid-Open No. 3-225745 is known. FIG. 11 shows a cross-sectional view of this lamp. The lamp is sealed with a xenon gas as a main component in a glass tube 1 and a high-frequency voltage is applied to external electrodes 7 and 7 ′ to form a dielectric inside the lamp. A barrier discharge occurs, mainly xenon excimers are formed, a vacuum ultraviolet light of about 172 nm is emitted, and visible light is emitted from the aperture section 6 after being converted into visible light by the phosphor layer 4.
[0003]
In the technique disclosed in JP-A-3-225745, a glass tube as a support of a lamp is thicker than necessary because it also serves as a dielectric barrier in a dielectric barrier discharge. Since high voltage is required and the electrodes are arranged on the outer surface of the lamp, it is necessary to pay sufficient attention to safety and insulation.
[0004]
Further, a technique as disclosed in Japanese Patent Application Laid-Open No. 3-88258 has been proposed. In this lamp, a pair of transparent electrodes are disposed inside a glass tube, the transparent electrodes are covered with a fluorescent substance, glass bead-wound electrode leads are sealed at both ends of the lamp, and an elastic contact plate connected to the electrode leads is provided. As a result, a rare gas containing xenon gas as a main component is sealed as in the previous invention. Further, as an application example, the electrode lead portion is formed in a foil shape and is in close contact with the transparent electrode near the sealing portion.
[0005]
According to the technique disclosed in Japanese Patent Application Laid-Open No. 3-88258, an electrode to which a high voltage is applied is provided inside the glass tube, so that the insulation or safety can be improved as compared with the lamp described above. However, in this lamp, the elastic contact plate not covered with the phosphor and the strip-shaped electrode portion near the sealing portion are directly exposed to the discharge space. In this technique, the discharge impedance is only between a pair of electrodes provided inside the lamp, but the discharge impedance is close to the elastic contact plate not covered with one of the phosphors or the strip-shaped electrode portion near the sealing portion. In some cases, the discharge impedance between the other transparent electrode becomes low, and the discharge concentrates on this portion, which may not function as a lamp.
[0006]
Japanese Patent Application Laid-Open No. H11-25923 is disclosed as a further conventional technique in this field. In this technique, one electrode is arranged inside, and the other electrode is arranged on an outer surface. With respect to the structure for taking out the electrodes from the internal electrodes to the outside, it is disclosed only in FIG. 1 of the gazette of this prior art, and the details are unknown. You can read that there is.
[0007]
In the technology disclosed in Japanese Patent Application Laid-Open No. H11-25923, improvements are made in terms of insulation or safety in the same manner as the technology described in Japanese Patent Application Laid-Open No. 3-88258 in that it is an internal electrode. However, FIG. 5 of this publication discloses a technique for removing a part of the external electrode in order to avoid discharge concentration due to the distance between the electrode laid inside and the external electrode. Depending on the pressure and the distance between the internal electrode and the external electrode, the discharge impedance may be lower between the electrode lead and the external electrode directly exposed to the discharge space, and a stable discharge may not be obtained. Furthermore, since the power supply terminals to the electrodes are taken out from both ends of the lamp, the length of the lamp itself becomes long, and the routing of the electrode take-out leads to a problem that the stray capacitance of the electrode take-up lead increases.
[0008]
As described above, in the prior art, since the high-voltage portion is outside the lamp, sufficient attention must be paid to insulation for safety, so that the manufacturing process such as covering the lamp electrode with an insulating tube is required. , Increasing material costs. Further, even when an electrode is provided inside, there is a problem that a stable discharge cannot be obtained due to an insufficient connection method between the internal electrode and the external lead.
[0009]
Furthermore, in the prior art, the phosphor film formed on the inner surface of the glass tube is usually applied by sucking, pouring, or spraying a suspension of the phosphor, and the phosphor itself is applied to the method itself. There are inherent factors that cause coating unevenness, and of course, if there is a foreign substance, protrusion, or unevenness on the inner surface of the glass tube, uneven coating of the phosphor will occur, and it is impossible to obtain a uniform phosphor surface. It was very difficult. When a plurality of types of phosphors, for example, red (R), green (G), and blue (B) phosphors are mixed and applied, the particle diameters, specific gravities, and the like are different from each other. There is also a problem of color misregistration, which deviates from a predetermined R, G, B mixture ratio at the same time as uneven coating. Also in this regard, when an electrode is provided inside a glass tube, it is difficult to uniformly cover the electrode with a phosphor layer, and as a result, it is difficult to achieve a uniform discharge. There has been a problem of non-uniformity.
[0010]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a fluorescent lamp that has a uniform phosphor surface on the inner surface of a glass tube, thereby enabling uniform discharge. It is another object of the present invention to provide a fluorescent lamp in which the voltage at the start of discharge is reduced by making the dielectric layer serving as a dielectric barrier of the discharge thinner while utilizing the dielectric barrier discharge, thereby improving the power conversion efficiency. Another object of the present invention is to provide a fluorescent lamp in which a high voltage is applied to the inside of the lamp instead of the outside, so that safety insulation can be easily ensured.
[0011]
[Means for Solving the Problems]
The inventors disclosed an invention in which a material called a green sheet is applied to a fluorescent lamp in an application prior to the present invention, Japanese Patent Application No. 11-109564. The green sheet is obtained by molding a material into a thin plate shape in a green (raw) state. In the specification of this application, it has been shown that the green sheet has various advantages not found in the past. The present invention is a further development of the above invention in order to solve the above-mentioned problems, and the means thereof will be described below.
[0012]
The invention of claim 1 of the present invention provides a fluorescent lamp in which a pair of electrodes are provided over substantially the entire length of a tubular discharge vessel formed by a first dielectric, and an excimer-produced gas is sealed in an inner wall of the discharge vessel. At least one electrode is provided, a second dielectric layer is provided between the one electrode and the excimer product gas, and at least a part of the second dielectric layer is covered by a phosphor layer. Have beenThe second dielectric layer and the phosphor layer are each formed by inserting a dielectric green sheet and a phosphor green sheet into the discharge vessel and firing the same; It is.
[0014]
Claims of the invention2The invention according to claim 1, wherein the second dielectric layer and the one electrode are a green sheet structure integrated with each other.1The fluorescent lamp described in the above item.
[0015]
Claims of the invention3The invention ofA pair of electrodes is provided over substantially the entire length of the tubular discharge vessel formed by the first dielectric, and at least one electrode is provided on the inner wall of the discharge vessel in a fluorescent lamp in which an excimer product gas is sealed. A second dielectric layer is provided between the one electrode and the excimer product gas, and at least a part of the second dielectric layer is covered by a phosphor layer,The one electrode and the second dielectric layer are formed on the inner wall of the discharge vessel by inserting and firing a green sheet structure integrally formed with the phosphor layer in the discharge vessel. CharacteristicAnd fluorescent lampIt is assumed that.
[0017]
Claims of the invention4The invention of claim 1, wherein the integrally formed green sheet structure is divided into a plurality of parts.3The fluorescent lamp described in the above item.
[0018]
Note that the green sheet structure is a structure in which the green sheets form a structure, and is a structure in which green sheets such as a phosphor green sheet and a dielectric green sheet are closely attached. Further, the electrode is a long electrode extending over substantially the entire length of the tubular discharge vessel, and one form thereof is a strip electrode.
[0019]
[Action]
Next, the operation of the present invention in which the above-described means is adopted will be described. As already described in the prior art, providing an electrode inside a glass tube is a known technology. There are various waysis there. According to the first aspect of the present invention, a green sheet of a second dielectric layer and a phosphor layer is inserted into a glass tube in a form in which electrodes are provided inside a glass tube as a first dielectric. Since the firing is performed, the thickness of the second dielectric layer can be reduced, the voltage at the time of discharge can be reduced, and the efficiency of power conversion to excimer generated gas can be improved. In addition, when electrodes are provided inside the glass tube, projections and irregularities are expected, but since the green sheet is well formed and adhered to the projections and irregularities during the heat compression bonding, the uniformity is obtained. Since the aperture portion is formed together with the second dielectric layer and the phosphor layer which are in close contact with the inner surface of the glass tube and the electrode, a uniform discharge is generated over the entire length of the lamp, and the uniform thickness of the phosphor layer causes a uniform discharge from the aperture portion. Emits uniform light in the axial direction of the glass tube.
[0021]
Claims of the invention2According to the invention, the green sheet structure in which the electrode and the second dielectric layer are integrally formed, and the green sheet of the phosphor layer are inserted into the glass tube and fired, so that the second dielectric layer can be thinned. As a result, the voltage at the time of discharge can be reduced, and the efficiency of power conversion to excimer product gas can be improved. In addition, since the aperture is formed together with the electrode, the second dielectric layer and the phosphor layer which are uniformly adhered to the inner surface of the glass tube, uniform discharge is achieved over the entire length of the lamp, and the phosphor layer having a uniform thickness is used. Uniform light is emitted from the aperture in the glass tube axial direction.
[0022]
Claims of the invention3In the invention, an electrode and a second dielectric layer are integrally molded with a phosphor layer as a green sheet structure, and the integrally molded green sheet structure is simultaneously inserted into a glass tube as a first dielectric and fired. Therefore, an aperture is formed together with the electrode, the second dielectric layer, and the phosphor layer which are uniformly adhered to the inner surface of the glass tube, and a uniform discharge is generated over the entire length of the lamp. Emits uniform light in the axial direction of the glass tube.
[0024]
According to the invention of claim 4 of the present invention, since the integrally formed green sheet structure is divided into a plurality of parts, a plurality of integrally formed green sheet structures can be arranged at any position inside the glass tube. And green sheets having different firing conditions can be separately inserted and fired.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 7 is a drawing for explaining the green sheet used in the present invention. FIG. 7 shows a state in which a green sheet 24 used for a fluorescent lamp according to the present invention is formed on an organic film structure 25, and the fluorescent substance is mixed with an organic binder and a plasticizer and a dispersant together with a solvent. The green sheets 24 are mixed and cast on an organic film structure 25 of, for example, polyethylene terephthalate (PET) with a certain thickness by a doctor blade method or the like, and the solvent is dried to produce a green sheet 24 on the organic film structure 25. .
[0026]
Although this doctor blade method has been used for a long time, the paste used in this method has a relatively high viscosity, so that it is easy to handle and does not pollute the environment. Furthermore, there is little waste such as easy recovery and reuse of the used paste. Therefore, the paste material used for the green sheet produced by this method is much less wasteful than the prior art. Here, the embodiment will be described by a doctor blade method, but a green sheet can be similarly produced by a screen printing method, and the same effect can be expected.
[0027]
Further, in the doctor blade method and the screen printing method, it is easy to control the formation of the printed film thickness over a wide area. In particular, a thickness of about 10 μm can be formed with a thickness of about ± 2 μm without difficulty. With conventional technology, it is not easy to maintain film uniformity as the film thickness increases, but with the doctor blade method or screen printing method, the thickness accuracy is maintained at about ± 2μ even when the printed film thickness is further increased. It is easy to do.
[0028]
FIG. 1 shows a simplified cross section perpendicular to the tube axis of a lamp according to a first embodiment of the present invention. The glass tube 1 is made of borosilicate glass, and has an outer diameter of 10 mm and a glass thickness of 0.5 mm. Various glasses other than this glass, such as lead glass, soda-lime glass, quartz glass, and aluminosilicate glass, can be used. In the figure, the internal electrodes 2 and 2 ′ are formed by printing a conductive material such as a silver paste on the organic film structure 25 in advance by screen printing, and further forming a second dielectric layer formed thereon by a doctor blade method. A green sheet was produced. Here, the thickness of the electrode printed by screen printing was approximately 5 to 10 μm after firing. As the material of the second dielectric layer, a material having the same or a slightly smaller expansion coefficient than that of the glass tube 1 was selected. Although the softening point of the material of the second dielectric layer varies depending on the sealing method described later, a material having a softening point lower than that of the glass tube 1 used here was selected. The thickness is about 100 μm in a green sheet state, and the thickness decreases by about 40% after firing.
[0029]
Next, the phosphor green sheet prepared by the same method was placed on the second dielectric layer green sheet and inserted into the glass tube 1. Here, the thickness of the phosphor green sheet is 40 μm. This thickness does not change significantly after firing. As a method of fixing these green sheets to the glass tube 1, for example, as shown in FIG. 8, a cylindrical body 26 is inserted into the glass tube 1, placed outside the glass tube 1, and heated to a predetermined temperature. While the green sheet 24 is heated by the heating body 27 having the heat generating portion, the green sheet 24 is pressed against the inner surface of the glass tube 1 between the heating body 27 and the cylindrical body 26.
[0030]
Here, the organic binder and the plasticizer in the green sheet 24 react with each other by heating, whereby the green sheet 24 has adhesiveness, and the inner surface of the glass tube 1 and the green sheet 24 are adhesively transferred by the pressure at the time of pressing. . The aperture section 6 has already been formed at this stage, and there is no labor and no waste of material for removing the phosphor once applied as in the prior art. Also, on the inner surface of the glass tube 1 at the aperture portion 6, there is almost no residue of the phosphor, and a good aperture portion is formed. In this embodiment, the phosphor green sheet is used. However, as shown in FIG. 9, a green sheet structure in which the reflector layer 5 and the phosphor layer 4 are laminated and integrally formed may be used. FIG. 9 is a schematic view of the green sheet structure viewed from above and from the side.
[0031]
Examples of the reflector layer 5 include α-alumina, γ-alumina, titanium oxide, calcium pyrophosphate, silica, barium sulfate, and the like. In order to reduce the amount of expensive phosphor used, it is easy to form a green sheet structure in which the phosphor layer 4 has a thickness of about 10 to 20 μm and the remainder is formed integrally with the reflective material. Also, an inexpensive halophosphate phosphor can be used as the reflector layer.
[0032]
Next, the glass sheet 1 having the green sheet 24 adhered and transferred to the inner surface thereof is fired. As firing conditions, for example, firing is performed at room temperature to 300 ° C. for 30 minutes, at 300 ° C. to 450 ° C. for 30 minutes, and at 450 ° C. for 10 minutes. Thereafter, natural cooling is performed. Thereafter, the end of the glass tube 1 is cut and sealed with a burner or the like. At the other end, for example, as shown in FIG. 6, a glass exhaust connection pipe 23 having the same degree of expansion coefficient as the glass tube 1 is inserted into the glass tube 1, and viewed from the inside of the glass tube 1. The exhaust connection tube 23, the second dielectric layer 3, the internal electrodes 2, 2 ', and the glass tube 1 are formed.
[0033]
In this case, when the second dielectric layer 3 is covered with the phosphor layer 4, at least the vicinity of the seal portion 22 in the figure is mechanically removed with a brush or the like. The fluorescent layer 4 may not be laid on the second dielectric layer 3. Next, from the side opposite to the side where the exhaust connection pipe 23 is inserted into the glass tube 1, the seal portion 22 is burned or locally heated while finely controlling the flow rate of nitrogen gas for the purpose of preventing oxidation of the phosphor. Sealing is performed by heating with a heater or the like.
[0034]
Here, when using a low melting point glass as the second dielectric layer 3, a material having a lower softening point than the glass tube 1 is selected. However, if a low-melting point material having a softening point significantly lower than the softening point of the glass tube 1 is selected, when the sealing portion 22 is heat-sealed, the second dielectric layer 3 is formed when the glass tube 1 has a softening point or higher. The material of the second dielectric layer 3 is selected based on the material of the glass tube 1, the heating power of the burner, the heating conditions of the heater, and the like, since bumping may occur to generate air bubbles and significantly reduce the airtightness of the seal. Avoid this bumping. For example, it is preferable to use crystallized solder glass as the second dielectric layer 3. The crystallized solder glass has such a property that it crystallizes after softening at a relatively low temperature and does not soften to a temperature approximately equal to the softening point of the glass tube 1 when reheated. . After the sealing is completed, the exhaust connection pipe 23 is connected to the exhaust system port, gas baking is performed, a rare gas is sealed, and seal-off is performed in the vicinity of the finest part of the exhaust connection pipe 23. Here, as the rare gas, a mixed gas mainly composed of xenon was used, and in this embodiment, a mixed gas of 30% xenon and 70% neon was filled with 39.9 kPa.
[0035]
The lamp of the present invention has lead-out portions 21 and 21 'on the inner surface of the glass tube 1, and a power supply line is connected to the lead-out portions 21 and 21'. The lamp was turned on by the flyback method as seen in Japanese Unexamined Patent Application Publication No. H11-163,873.
[0036]
The results of the characteristics of the lamp according to the present invention are summarized as a table in FIG. 10 in comparison with the prior art. Here, the lamp of the prior art is a lamp having a structure shown in FIG. 11 in which a phosphor suspension is sucked up and applied to the inner surface of a glass tube, and the electrodes are silver paste printed on the outer surface of the glass tube. For comparison with the present invention, 39.9 kPa of a mixed gas of 30% xenon and 70% neon was filled with the same specifications for the glass tube diameter, lamp length, gas and the like. The number of lamps used for the evaluation was three sets each including the prior art. The illuminance and chromaticity in the table are all average values. For comparison, the inverter input was adjusted 5 minutes after lighting so that the central illuminance of the lamp was 50,000 lx. All measurement conditions in the table are unified, and the lamp voltage is a 0-peak value reading.
[0037]
The illuminance was measured using a commercially available illuminometer (Minolta T-1M), and the distance between the outer surface of the glass tube of the lamp and the sensor was 8 mm. In the table, the drop in illuminance is the larger of the relative drop in illuminance at two positions of ± 150 mm with respect to the illuminance at the center of the lamp.
[0038]
The chromaticity was measured at a viewing angle of 0.1 ° using a commercially available color luminance meter (Topcon BM-7), aiming near the center of the aperture of each lamp. In the table, the chromaticity variation indicates a relative value variation with respect to the chromaticity (x, y) at the center of the lamp.
[0039]
The lamp power was determined by the Vq Lissajous method often used in ozonizer discharge because it is difficult to measure by a normal method. The Vq Lissajous method is described in detail in, for example, Ozonizer Handbook (P232-235 Corona, 1960).
[0040]
In the embodiment shown in FIG. 1, the lamp voltage can be reduced by about 15% as compared with the prior art, and the illuminance efficiency with respect to the lamp input is improved by about 10%. This is because in the prior art, the thickness of the glass forming the cylindrical discharge vessel is about 300 μm to 600 μm, whereas in the present invention, the thickness of the dielectric involved in the dielectric barrier discharge is suppressed to about 100 μm. As a result, the power conversion efficiency from the high voltage circuit to the excimer product gas has been improved, and various materials can be selected for the second dielectric layer, and the loss in the second dielectric layer is reduced. It is presumed that it was.
[0041]
Regarding the light distribution characteristics of the lamp, in the prior art, in a lamp having a total length of about 360 mm, the illuminance drop at a position of ± 150 mm from the center of the lamp was about 10% with respect to the center of the lamp, but was about 5%. It has been improved, and the chromaticity variation has been reduced to about half that of the prior art. In addition, by covering the lamp with a conventional insulating tube, the illuminance is reduced by about 3%, and in the life characteristics, the illuminance is deteriorated due to the coloring of the insulating tube, but these problems have been solved.
[0042]
In this embodiment, the prepared phosphor green sheet is superimposed on the green sheet of the second dielectric layer and inserted into the glass tube 1. However, the internal electrode and the second dielectric layer are integrated. The green sheet structure and the phosphor green sheet may be overlapped and inserted into the glass tube 1, or the method of inserting the green sheet structure in which the internal electrode, the second dielectric layer, and the phosphor layer are integrated may be more. It is simple.
[0043]
FIG. 2 shows a simplified cross section perpendicular to the tube axis of a lamp according to a second embodiment of the present invention. In this embodiment, one external electrode 7 is provided on the outer surface of the glass tube 1 and a green sheet structure integrally formed with an internal electrode, a second dielectric layer, and a phosphor layer is inserted and fixed therein. It is. As compared with the embodiment shown in FIG. 1, the alignment of the external electrode 7 and the integrally formed green sheet structure is complicated, but it can be manufactured much more easily than the prior art.
[0044]
The glass tube material, sealing method, sealing gas conditions, and the like are the same as those in the embodiment shown in FIG. This lamp has one lead lead-out part 21 on the inner surface of the glass tube 1 and another lead lead-out part 21 'outside. A power supply line was connected to these lead extraction portions 21 and 21 ', and the lamp was turned on by the same lighting method as that of the related art. The results are summarized as a table in FIG. 10 in comparison with the prior art. Among them, the lamp voltage could be reduced by about 8% as compared with the prior art, and the illuminance efficiency with respect to the lamp input was improved by about 7%.
[0045]
FIG. 3 shows a simplified cross section perpendicular to the tube axis of a lamp according to a third embodiment of the present invention. The difference from the embodiment of FIG. 1 is that a green sheet structure obtained by integrally molding an internal electrode, a second dielectric layer, and a phosphor layer is divided into two and inserted separately. . In this embodiment, since the pair of internal electrodes 2 and 2 'have the same shape, it can be applied to a pair of electrodes only by designing the internal electrode 2 on one side. In FIG. 3, there is a cut 8 that can be visually confirmed, and light leakage was recognized from this portion. Although there are some difficulties in the variation of the opening angle of the aperture section 6, since the position of the integrally formed green sheet structure is variable, the opening angle of the aperture section 6 can be freely changed. The integrally molded green sheet structure was easy to insert into the glass tube 1 and fix. The glass tube material, sealing method, filling gas condition, lead wire drawing method, and the like are the same as those in the embodiment shown in FIG.
[0046]
The lamp of FIG. 3 was turned on by the same lighting method as the conventional one. The results are summarized as a table in FIG. 10 in comparison with the prior art. Among them, the lamp voltage can be suppressed to the same level as that of the embodiment shown in FIG. 1, and the illuminance efficiency with respect to the lamp input is 2907 lx / W in comparison with the prior art of 2907 lx / W. An improvement of about 9% was seen at 3230 lx / W. Further, when a Teflon tape was laid as a tape having a high visible light reflectance at a place where the light leaked in the glass tube 1, the ratio was improved from 9% to 11%.
[0047]
4 and 5 are cross sections perpendicular to the tube axis of the lamps of the fourth and fifth embodiments, respectively. Although the cut 8 is formed in the embodiment of FIG. 3 described above, in these embodiments, the overlapping portion 9 is formed in FIG. 4 or the abutting portion 10 is formed in FIG. As in the embodiment of FIG. 3, even in these examples, there are some difficulties in the variation of the opening angle of the aperture portion 6, but since the position of the integrally formed green sheet structure is variable, the opening angle of the aperture portion 6 is reduced. It can be changed freely. Insertion and fixing of the integrally formed green sheet into the glass tube were easy. The glass tube material, sealing method, filling gas condition, lead wire drawing method, and the like are the same as those in the embodiment shown in FIG.
[0048]
The lamps of the embodiments of FIGS. 4 and 5 were turned on by the same lighting method as the conventional one. The results are summarized as a table in FIG. 10 in comparison with the prior art. Among them, the lamp voltage can be suppressed to the same level as that of the embodiment shown in FIG. 1, and the illuminance efficiency with respect to the lamp input is improved by about 10% as compared with the conventional technology.
[0049]
It goes without saying that the present invention is not limited to the form described in the above-mentioned embodiment. For example, in FIG. 1, the second dielectric layer 3 is also provided in a portion including the internal electrode 2, where there is no electrode facing the aperture section 6, but covers only the internal electrode 2 to reduce material. You may do so.
[0050]
In addition, a green sheet structure in which the electrode, the second dielectric layer, and the phosphor layer are integrally formed is provided in a glass tube, and visible light transmitted through the phosphor is extracted without providing the aperture section 6. It can be applied to light sources. Further, the present invention can be applied to a light source in which a green sheet structure including an electrode and a second dielectric layer is disposed inside a glass tube, and radiates light emitted from an excimer generated gas.
[0051]
【The invention's effect】
The effects of the present invention will be described below.
[0052]
Claim1According to the invention, the green sheet of the second dielectric layer and the phosphor layer is inserted into the glass tube and fired in the form in which the electrodes are disposed inside the glass tube as the first dielectric, so that the second Can be made thinner, the voltage at the start of discharge can be reduced, and the efficiency of power conversion to excimer generated gas can be improved.
[0053]
In addition, when electrodes are provided inside the glass tube, projections and irregularities are expected, but since the green sheet is well formed and adhered to the projections and irregularities during the heat compression bonding, the uniformity is obtained. Since the aperture is formed together with the second dielectric layer and the phosphor layer in close contact with the inner surface of the glass tube and the electrode, a uniform discharge is generated over the entire length of the lamp, and the uniform thickness of the phosphor layer causes the discharge from the aperture. Emits uniform light in the axial direction of the glass tube.
[0054]
In addition, since the overall length of the lamp can be reduced and the efficiency of power conversion to excimer-producing gas can be improved, the same amount of light can be obtained on the document surface, thereby saving power compared to the prior art. Further, since the lamp voltage can be reduced, a variety of transformers and device elements can be used for the drive circuit, and the cost of the drive circuit can be reduced.
[0055]
Claim2According to the invention, the electrode and the green sheet structure of the second dielectric layer and the green sheet of the phosphor layer are inserted into the glass tube which is the first dielectric and fired, so that the second dielectric The body layer can be thinned, the voltage at the start of discharge can be reduced, and the efficiency of power conversion to excimer product gas can be improved. In addition, since the aperture is formed together with the electrode, the second dielectric layer, and the phosphor layer, which are uniformly adhered to the inner surface of the glass tube, uniform discharge is achieved over the entire length of the lamp. Uniform light is emitted from the aperture in the glass tube axial direction.
[0056]
Claim3According to the invention, the electrode and the second dielectric layer are integrally molded with the phosphor layer as a green sheet structure, and the integrally molded green sheet structure is simultaneously inserted into a glass tube as the first dielectric and fired. Therefore, an aperture is formed together with the electrode, the second dielectric layer, and the phosphor layer which are uniformly adhered to the inner surface of the glass tube, and a uniform discharge is generated over the entire length of the lamp. Uniform light is emitted in the axial direction of the glass tube.
[0058]
Claim4According to the invention, the integrally formed green sheet structure is divided into a plurality of pieces, so that a plurality of integrally formed green sheet structures can be arranged at any position or overlapped inside the glass tube. It is also possible to separately insert green sheets having different firing conditions into the glass tube and fire them.
[Brief description of the drawings]
FIG. 1 is a diagram showing a cross section perpendicular to a tube axis of a lamp according to a first embodiment of the present invention.
FIG. 2 is a view showing a cross section perpendicular to a tube axis of a lamp according to a second embodiment of the present invention.
FIG. 3 is a view showing a cross section perpendicular to a tube axis of a lamp according to a third embodiment of the present invention.
FIG. 4 is a diagram showing a cross section perpendicular to a tube axis of a lamp according to a fourth embodiment of the present invention.
FIG. 5 is a diagram showing a cross section perpendicular to the tube axis of a lamp according to a fifth embodiment of the present invention.
FIG. 6 is a diagram showing an example of a method for sealing a lamp of the present invention.
FIG. 7 is a diagram showing a cross section of a green sheet applied to the present invention.
FIG. 8 is a view showing a method of fixing a green sheet applied to the present invention to a glass tube.
FIG. 9 is a schematic view of a green sheet structure in which a reflector layer and a phosphor layer are applied to the present invention.
FIG. 10 is a table showing a comparison between the performance of the lamp of the present invention and the performance of the conventional lamp.
FIG. 11 shows a cross section perpendicular to the tube axis of a lamp according to the prior art.
[Explanation of symbols]
1 glass tube
2, 2 'internal electrode
3 Second dielectric layer
4 Phosphor layer
5 Reflective layer
6 Aperture
7, 7 'external electrode
8 cuts
9 Overlap
10 Butt section
21, 21 'lead extraction part
22 Seal part
23 Exhaust connection pipe
24 Green Sheet
25 Organic film structure
26 cylindrical body
27 heating element

Claims (4)

A pair of electrodes is provided over substantially the entire length of the tubular discharge vessel formed by the first dielectric, and at least one electrode is provided on the inner wall of the discharge vessel in a fluorescent lamp in which an excimer product gas is sealed. the second dielectric layer is provided between one electrode and the excimer product gas said at least a portion of said second dielectric layer is covered by the phosphor layer, the second dielectric A fluorescent lamp, wherein the layer and the phosphor layer are formed by inserting a dielectric green sheet and a phosphor green sheet into the discharge vessel and firing the same. The fluorescent lamp according to claim 1 , wherein a green sheet structure is formed by integrating the second dielectric layer and the one electrode. A pair of electrodes is provided over substantially the entire length of the tubular discharge vessel formed by the first dielectric, and at least one electrode is provided on the inner wall of the discharge vessel in a fluorescent lamp in which an excimer product gas is sealed. A second dielectric layer is provided between the one electrode and the excimer product gas, at least a portion of the second dielectric layer is covered by a phosphor layer, and the one electrode and the A fluorescent lamp, wherein a second dielectric layer is formed on the inner wall of the discharge vessel by inserting and firing a green sheet structure integrally formed with the phosphor layer into the discharge vessel. The fluorescent lamp according to claim 3 , wherein the integrally formed green sheet structure is divided into a plurality of pieces.

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