JPH11339720A - Flat fluorescent lamp and production of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat fluorescent lamp with a reduced manufacturing cost, intended to be a small size, and having a fine appearance and a production of the same. SOLUTION: A spiral trench 5 which is to be used as a discharge space is formed on a surface of a flat glass container 1. Electrode parts 3 having filaments 9 are provided at both ends of the groove 5. A surface of the glass container 1 is covered with a fluorescent material. The flat front glass 2 seals a surface of the glass container 1 and a surface of the front glass 2 on the side of the glass container 1 is covered with the fluorescent material. Here, a process of applying the fluorescent material on the glass container 1 and the front glass 2 simultaneously, a process of calcinating the fluorescent material applied on the glass container 1 and the front glass 2, and a process of heating the glass container 1 and the front glass 2, while these members are combined together, and welding these members to be airtight are successively performed and subsequently the electrode parts 3 are sealed in holes 6 of the glass container 1 using frit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat fluorescent lamp and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a flat fluorescent lamp of this type, as shown in FIG. 15, a glass container 1 having a plate-like shape and a spiral groove 5 serving as a discharge space formed on its surface, A front glass (not shown) sealed to the surface of the
And an electrode portion 3 having an electron emitting filament 9 and sealed in holes (not shown) formed at both ends of the groove 5. A phosphor (not shown) was applied and baked on the surface on the side of the container 1 (for example, see JP-A-9-8).
No. 2279).

In this flat fluorescent lamp, a glass container 1 is provided.
After the phosphor was applied to the front glass in a separate step, the phosphor was fired in a separate step. Further, when the front glass is sealed to the surface of the glass container 1, before the glass container 1 and the front glass are combined, a frit is applied only to the outermost peripheral portion of the surface of the front glass on the glass container 1 side, After the frit is calcined to remove the organic components contained in the frit, the glass container 1 and the front glass are combined. At this time, the electrode portion 3 provided with the filament 9 is attached to the hole of the glass container 1 and a frit is applied to the electrode portion 3 or a frit ring formed in the shape of the electrode portion 3 is attached to the electrode portion 3. Had been provided. Then, the frit applied to the front glass and the electrode portion 3 is main-baked, and the sealing between the glass container 1 and the front glass and the sealing between the glass container 1 and the electrode portion 3 are simultaneously performed. After the air in the space surrounded by the glass is exhausted, a rare gas is sealed in this space to form a flat fluorescent lamp.

By the way, a feature of this type of flat fluorescent lamp is that almost all of the luminous flux can be emitted from one surface of the flat fluorescent lamp by forming a reflective film in the groove 5 of the glass container 1. No. For example, JP-A-9-8
In the flat fluorescent lamp disclosed in Japanese Patent No. 2279, in order to improve the radiation efficiency of the lamp, as shown in FIG.
Are formed at approximately 106 degrees to approximately 135 degrees. Further, in the above-mentioned publication, it is also proposed to heat and seal the front glass and the glass container 1 with a gas burner (burner sealing).
If the diameter exceeds 65 mm, the yield of the burner sealing is extremely deteriorated, so that the sealing was actually performed using a frit. Incidentally, reference numeral 27 in FIG. 16 denotes a phosphor layer formed on the surface of the glass container 1.

As shown in FIGS. 17A to 17C, the glass container 1 and the front glass 2 are sealed by a frit 28 formed only on the outermost peripheral portion of the front glass 2, so that the glass If there is a gap between the partition 4 other than the outermost peripheral portion of the container 1 and the front glass 1, a short-circuit current may flow through this gap. If the frit 28 for sealing the glass container 1 and the front glass 2 is too thick, the front glass 2 is pressed by the atmospheric pressure toward the glass container 1 and bends, and a shear stress occurs near the frit 28. Then, the front glass 2 may be broken. In order to prevent the front glass 2 from being damaged, for example, Japanese Patent Application Laid-Open
In the flat fluorescent lamp disclosed in Japanese Patent No. 3882, the width L of the partition 4 partitioning between the grooves 5 is set to about 2 mm or more, and the gap D between the front glass 2 and the partition 4 is set to 0.1 mm or less. ing.

Further, in the flat fluorescent lamp disclosed in Japanese Patent Application No. 9-174467, as shown in FIG. 18, a stem for fixing a filament 9 via a tube 10 to a portion of a glass container 1 in which a hole 6 is formed. Some are fitted with 8.

[0007]

In the flat-type fluorescent lamp having the above structure, the phosphor is applied to the glass container and the front glass in different steps, and the phosphor is fired in the different steps. In addition, it was necessary to apply the frit to the two portions, that is, the joint portion between the glass container and the front glass and the joint portion between the glass container and the electrode portion, twice. Furthermore, when the glass container and the front glass are joined by a frit, it is necessary to remove the organic components of the frit in a process called frit calcination, and these operations require a work place and time, and thus the manufacturing is required. There was a problem that it was difficult to reduce the cost. Further, when the glass container and the front glass are sealed by using a frit, there is a problem that the color of the frit is conspicuous and the appearance of the lamp is deteriorated when the lamp is turned off.

Further, since the front glass and the glass container are sealed by a frit applied only to the outermost peripheral portion of the front glass, a gap is generated between a partition of the glass container other than the outermost peripheral portion and the front glass. However, a short-circuit current may flow through this gap. Therefore, it is necessary to increase the surface accuracy of the front glass so that no gap is generated between the partition of the glass container and the front glass, which has caused an increase in manufacturing cost. In addition, in order to prevent a short-circuit current from flowing through the gap between the partition of the glass container and the front glass, the width of the partition between the grooves is set to, for example, 2 mm.
It is necessary to make the above, but there is a problem that the partition does not emit light and this portion becomes dark, so that the appearance of the lamp deteriorates. In addition, there is also a problem that the diameter of the lamp increases when the width of the partition that separates the grooves increases.

The present invention has been made in view of the above problems, and has as its object to simplify the manufacturing process to reduce the manufacturing cost, improve the appearance of the lamp, and reduce the size of the lamp. An object of the present invention is to provide a flat fluorescent lamp and a method of manufacturing the same.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a spiral groove serving as a discharge space is formed on a surface of a flat plate, and holes are formed at both ends of the groove. A glass container in which is formed and a phosphor is attached to a key point,
The step of applying the phosphor simultaneously with the glass container, the step of firing the phosphor, and the step of heating the ambient temperature near the softening point in a state of being combined with the glass container and hermetically welding to the glass container are continuously performed. A flat front glass that is performed and sealed in a glass container, and a front glass having an electrode for electron emission and having a phosphor attached thereto is sealed with a frit in a hole of the sealed glass container. An electrode part, and a step of simultaneously applying a phosphor to the glass container and the front glass; a step of firing the phosphor applied to the glass container and the front glass; and a step of welding the glass container and the front glass. By performing it continuously, it is possible to reduce the number of manufacturing steps as compared with a case where the phosphor is applied and baked on the glass container and the front glass in separate steps, and furthermore, the bonding portion between the glass container and the electrode portion is reduced. Since the application of the frit,
A step of applying a frit, in which the color of the frit is not conspicuous and compared to a case where a frit is applied to two places, that is, a joint part of a glass container and a front glass and a joint part of a glass container and an electrode part as in a conventional example. Is performed only once, and the number of manufacturing steps can be reduced. Therefore, the time required for manufacturing the lamp can be shortened, the number of lamps that can be manufactured within the same time increases, and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and the short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced and no shear stress is generated in the front glass. In addition, since it is not necessary to increase the width of the partition between the grooves provided in the glass container to prevent short-circuit current from flowing through the gap between the glass container and the front glass, the lamp is not required. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the appearance of the lamp can be improved.

According to the second aspect of the present invention, a glass plate is formed in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent substance is adhered to important parts. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a step of simultaneously applying the phosphor to the glass container and the front glass, a step of firing the phosphor applied to the glass container and the front glass, and heating in a state where the glass container and the front glass are combined. The step of sealing the glass container and the front glass in a hermetically sealed manner is performed continuously, and then the electrode portion is sealed with a frit in a hole of the glass container in a state where the front glass is welded. Container and The step of simultaneously applying the phosphor to the front glass, the step of baking the phosphor applied to the glass container and the front glass, and the step of fusing the glass container and the front glass are performed continuously, whereby the glass container and the front The manufacturing process can be reduced compared to the case where the phosphor is applied and baked on the glass in separate processes, and the frit is applied only to the joint between the glass container and the electrode, so that the color of the frit is reduced. The process of applying the frit is performed only once compared with the case where the frit is applied to two places, that is, the joint between the glass container and the front glass and the joint between the glass container and the electrode portion as in the conventional example without being noticeable. The number of lamps that can be manufactured in the same time increases, and the manufacturing cost can be reduced. It is possible to achieve. Furthermore, since no frit is used to join the glass container and the front glass, no gap is generated between the glass container and the front glass due to the thickness of the frit,
Since it is not necessary to increase the surface accuracy of the front glass in order to prevent a short circuit current from flowing through the gap between the glass container and the front glass, the manufacturing cost of the front glass can be reduced,
Moreover, no shear stress is generated on the front glass.
In addition, since it is not necessary to increase the width of the partition between the grooves provided in the glass container to prevent short-circuit current from flowing through the gap between the glass container and the front glass, the lamp is not required. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the appearance of the lamp can be improved.

The inventions of claims 3 to 12 are preferred embodiments of the invention of claim 2 and have the same effects as the invention of claim 2.

According to the fourteenth aspect of the present invention, a glass plate is formed in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent substance is adhered to important places. A flat-type fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container having a spiral groove formed on the surface is placed on a stainless steel base coated with a mold release agent with the grooved surface facing up, and the front surface is The portion of the glass container to be welded to the glass is shielded by the first shielding means, and the portion to be welded to the glass container is the second portion.
The front glass shielded by the shielding means is placed on the glass container via a support member for providing a gap between the front glass and the glass container, and a stainless steel holding member having a surface coated with a release agent is placed on the front surface. It is placed on the glass, a nozzle for applying the phosphor is inserted through a gap provided between the glass container and the front glass, and the phosphor is simultaneously spray-coated on the glass container and the front glass by the nozzle, and the glass container is And after drying the phosphor applied to the front glass, the ambient temperature of the glass container and the front glass is reduced to about 52
After heating to 5 ° C. to simultaneously fire the phosphor applied to the glass container and the front glass, the supporting member interposed between the glass container and the front glass is removed, and the glass container and the front glass are directly attached. Contact, and about 35 g /
After applying a pressure of ² cm ² and heating the ambient temperature to about 760 ° C. to weld the glass container and the front glass, the electrode portion was attached to the hole of the glass container to which the front glass was welded,
A frit is applied to the joint between the glass container and the electrode, and the joint is heated to about 450 ° C. to seal the electrode in the hole. There is a spiral groove formed on the surface to be a discharge space, and holes are formed at both ends of the groove, and a glass container in which a phosphor is attached at a key point and a glass container in which the phosphor is attached and sealed in a glass container. In manufacturing a flat fluorescent lamp composed of a flat front glass to be mounted and an electrode portion having an electrode for electron emission and sealed in a hole of the glass container, a release agent is applied to the surface. The front glass is placed on the attached stainless steel pedestal, the portion of the front glass welded to the glass container is shielded by the first shielding means, and the part welded to the front glass is protected by the second shielding means. Turn the shielded glass container face down with the spiral groove , Placed on the front glass via a support member for providing a gap between the front glass, a stainless steel holding member coated with a release agent on the surface is placed on the glass container, A nozzle for applying the phosphor is inserted from a gap provided between the glass container and the front glass, the phosphor is simultaneously spray-coated on the glass container and the front glass by the nozzle, and the phosphor applied on the glass container and the front glass is used. After drying, the ambient temperature of the glass container and the front glass is heated to about 525 ° C., and the phosphor applied to the glass container and the front glass is simultaneously fired. The glass container and the front glass are brought into direct contact with each other by removing the mounted support member, and about 35 mm is applied to the portion where the glass container and the front glass are welded by the pressing member. / Pressure cm ² was added, and heated to ambient temperature to about 760 ° C., after welding the glassware and the front glass, the electrode portions attached to the hole of the glass container front glass is welded, a glass container and the electrode portion Apply a frit to the joint with
A step of simultaneously applying the phosphor to the glass container and the front glass, wherein the step of applying the phosphor to the glass container and the front glass is carried out, similarly to the invention of claim 2; By continuously performing the step of firing the phosphor applied to the and the step of fusing the glass container and the front glass, the phosphor is applied to the glass container and the front glass in separate steps, compared with the case of firing. Since the manufacturing process can be reduced, and the frit is applied only to the joint between the glass container and the electrode, the color of the frit is not conspicuous, and the joining of the glass container and the front glass is performed as in the conventional example. Compared to the case where frit is applied to two places, that is, a part and a joint part of a glass container and an electrode part, is the process of applying frit only one time, and can the manufacturing process be reduced? , Reduces the time required for manufacturing the lamp, increasing the number of lamps that can be produced in the same time, it is possible to reduce the manufacturing cost. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and the short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced and no shear stress is generated in the front glass. In addition, since it is not necessary to increase the width of the partition between the grooves provided in the glass container to prevent short-circuit current from flowing through the gap between the glass container and the front glass, the lamp is not required. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the appearance of the lamp can be improved.

The invention of claim 16 is the invention of claim 14 or 15
Claim 14 or Claim 15, which is a preferred embodiment of the present invention.
The same operation and effect as those of the invention can be obtained.

According to a seventeenth aspect of the present invention, in the tenth aspect of the present invention, a phosphor is applied to each of the glass container and the front glass in a state where a supporting member is interposed between the glass container and the front glass. After drying the phosphors respectively applied to the front glass, in a state where the support member is removed and the glass container and the front glass are brought into direct contact with each other, firing of the phosphors respectively applied to the glass container and the front glass is performed. A step of firing the phosphor and a step of welding the glass container and the front glass in a state where the supporting member is removed and the glass container and the front glass are directly contacted with each other. Therefore, compared to the case where the support member is removed after the phosphor is fired and the glass container and the front glass are brought into direct contact, the support is performed in a high temperature environment. Becomes unnecessary moving parts contacting the glass container and the front glass to remove the wood, the reliability of the movable portion in factors such as thermal expansion or oxidation can be prevented from being lowered.

According to the eighteenth aspect of the present invention, a glass plate is formed in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent substance is adhered to important parts. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container having a spiral groove formed on the surface is placed on a stainless steel base coated with a mold release agent with the grooved surface facing upward, and the front surface is The portion of the glass container to be welded to the glass is shielded by the first shielding means, and the portion to be welded to the glass container is the second portion.
The front glass shielded by the shielding means is placed on a glass container via a support member for providing a gap between the front glass and the glass container, and a stainless steel holding member having a surface coated with a release agent is placed on the front surface. It is placed on the glass, a nozzle for applying the phosphor is inserted through a gap provided between the glass container and the front glass, and the phosphor is simultaneously spray-coated on the glass container and the front glass by the nozzle, and the glass container is And after drying the phosphor applied to the front glass, remove the supporting member interposed between the glass container and the front glass, directly contact the glass container and the front glass, and press the glass container and the pressing member After applying a pressure of about 35 g / cm ² to the portion of the front glass to be welded,
The surrounding temperature of the glass container and the front glass is heated to about 525 ° C. while flowing air near the portions of the glass container and the front glass to which the phosphor has been applied, respectively, and the phosphor applied to the glass container and the front glass is cooled. At the same time, after the firing, the air was stopped from flowing near the portions of the glass container and the front glass to which the phosphors were applied, and the ambient temperature was heated to about 760 ° C. to weld the glass container and the front glass, Attach the electrode to the hole of the glass container where the glass is welded, apply a frit to the joint between the glass container and the electrode, heat the joint to about 450 ° C., and seal the electrode to the hole. According to the nineteenth aspect of the present invention, a spiral groove serving as a discharge space is formed on the surface of the flat plate, and holes are formed at both ends of the groove. A flat plate comprising a glass container, a flat front glass on which a phosphor is attached and sealed to the glass container, and an electrode portion having an electrode for electron emission and sealed in a hole of the glass container. In manufacturing the fluorescent lamp, the front glass is placed on a stainless steel pedestal whose surface is coated with a release agent, and a portion of the front glass to be welded to the glass container is shielded by the first shielding means, The glass container whose site to be welded to the front glass is shielded by the second shielding means is turned downward with the surface on which the spiral groove is formed, and via a support member for providing a gap between the glass container and the front glass. It is placed on the front glass, a stainless steel holding member having a surface coated with a release agent is placed on the glass container, and the phosphor is applied from a gap provided between the glass container and the front glass. Insert the nozzle for Spray coating the phosphor simultaneously on the glass container and the front glass, after drying the phosphor applied to the glass container and the front glass, remove the supporting member interposed between the glass container and the front glass, After the glass container and the front glass are brought into direct contact with each other and a pressure of about 35 g / cm ² is applied to the portion where the glass container and the front glass are welded by the pressing member, the portions of the glass container and the front glass to which the phosphor is applied, respectively The surrounding temperature of the glass container and the front glass is heated to about 525 ° C. while flowing air in the vicinity, and the phosphors applied to the glass container and the front glass are simultaneously fired. And stopping the flow of air near the area of the front glass, heating the ambient temperature to about 760 ° C., The electrode is attached to the hole of the glass container to which the front glass is welded, a frit is applied to the joint between the glass container and the electrode, and the joint is heated to about 450 ° C. A step of simultaneously applying a phosphor to the glass container and the front glass, and a step of firing the phosphor applied to the glass container and the front glass, as in the invention of claim 2. By continuously performing the step of welding the glass container and the front glass, and applying the phosphor in the glass container and the front glass in separate steps, it is possible to reduce the number of manufacturing steps, and Since the frit is applied only to the joint between the glass container and the electrode portion, the color of the frit is not conspicuous, and the joint between the glass container and the front glass and the glass container as in the conventional example. Compared to the case where the frit is applied to two places with the joint of the electrode and the electrode part, the process of applying the frit is performed only once and the number of manufacturing steps can be reduced, so that the time required for manufacturing the lamp is shortened, The number of lamps that can be manufactured in the same time increases, and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and the short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced and no shear stress is generated in the front glass. In addition, since it is not necessary to increase the width of the partition between the grooves provided in the glass container to prevent short-circuit current from flowing through the gap between the glass container and the front glass, the lamp is not required. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the appearance of the lamp can be improved. In addition, since the supporting member is removed and the step of firing the phosphor and the step of fusing the glass container and the front glass are performed in a state where the glass container and the front glass are in direct contact with each other, the supporting member is fired after the phosphor is fired. The movable part for contacting the glass container and the front glass in a high-temperature environment is unnecessary compared with the case where the glass container and the front glass are brought into direct contact with each other, and the reliability of the movable part is reduced due to factors such as thermal expansion and oxidation. Can be prevented from decreasing.

According to a twentieth aspect, in the second aspect, a phosphor is simultaneously applied to the glass container and the front glass in a state where the glass container and the front glass are in direct contact with each other. After the coated phosphor is dried, the phosphor is fired and the glass container and the front glass are welded, and the phosphor is applied and fired while the glass container and the front glass are positioned. And welding of the glass container and the front glass, and the lamp can be manufactured with high accuracy.

According to the twenty-first aspect of the present invention, glass is formed in a flat plate shape, on which a spiral groove serving as a discharge space is formed on the surface, holes are formed at both ends of the groove, and a fluorescent material is adhered to a key point. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container having a spiral groove formed on the surface is placed on a stainless steel pedestal coated with a release agent with the grooved surface facing upward, and the glass The front glass is placed on the container, and a stainless steel holding member coated with a release agent on the surface is placed on the front glass, and about 35 g is applied to the portion where the glass container and the front glass are welded by the holding member. / pressure cm ² was added, forming a glass container After flowing the phosphor together with the nitrogen gas into the space surrounded by the glass container and the front glass from the hole thus formed, and applying the phosphor, air is allowed to flow near the portions of the glass container and the front glass to which the phosphor is applied, respectively. While maintaining the ambient temperature of the glass container and the windshield at about 52
After heating to 5 ° C. and simultaneously firing the phosphor applied to the glass container and the front glass, the flow of air near the portions of the glass container and the front glass to which the phosphor was applied was stopped, and the ambient temperature was reduced. Was heated to about 760 ° C. for about 10 minutes, the glass container and the front glass were welded, the electrode portion was attached to the hole of the glass container to which the front glass was welded, and a frit was applied to the joint between the glass container and the electrode portion. Heating the joint to about 450 ° C. and sealing the electrode in the hole, simultaneously applying the phosphor to the glass container and the front glass, and applying the phosphor to the glass container and the front glass. By continuously performing the step of firing the phosphor and the step of welding the glass container and the front glass, the phosphor is applied and fired on the glass container and the front glass in separate steps. Compared with the case, the number of manufacturing steps can be reduced, and since the frit is applied only to the joint between the glass container and the electrode portion, the color of the frit is not conspicuous, and the glass container and 2 of the joint of the front glass and the joint of the glass container and the electrode
Compared to the case where the frit is applied to one place, the process of applying the frit is performed only once, and the number of manufacturing steps can be reduced. Therefore, the time required for manufacturing the lamp is reduced, and the number of lamps that can be manufactured in the same time is reduced. And the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and the short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced and no shear stress is generated in the front glass. In addition, since it is not necessary to increase the width of the partition between the grooves provided in the glass container to prevent short-circuit current from flowing through the gap between the glass container and the front glass, the lamp is not required. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the appearance of the lamp can be improved. Further, the phosphor is applied and fired in a state where the glass container and the front glass are directly in contact with each other, and the glass container and the front glass are welded. Since the firing, the firing, and the welding of the glass container and the front glass are performed, the lamp can be manufactured with high accuracy.

[0019]

Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional view of a flat fluorescent lamp of the present embodiment, and FIG. 2 is a view of a glass container as viewed from above.

This flat-type fluorescent lamp is flat and has a spiral groove 5 serving as a discharge space formed on the surface thereof, holes 6 formed at both ends of the groove 5, and a phosphor adhered to the surface. A glass container 1, a flat front glass 2 on which a phosphor is adhered on one side and sealed on the surface of the glass container 1, and a hole 6 of the glass container 1 having a filament 9 as an electrode for emitting electrons. And an electrode portion 3 to be sealed. The electrode section 3 is provided with a filament 9 attached to a stem 8 made of, for example, lead glass on which an exhaust pipe 7 is provided, and a stem 8 attached to an end of the tube 10 in a state where the filament 9 is housed inside a tube 10 made of lead glass. Is formed by burner sealing. Here, the glass container 1 and the front glass 2 are made of inexpensive and easily available soda-lime glass. Further, the filament 9 is electrically connected to an external circuit via an introductory wire (not shown).

Hereinafter, a method of manufacturing the flat fluorescent lamp will be described.

First, as shown in FIG. 3, a spiral groove 5 is formed on a frame member 15 serving as a pedestal in which an opening 13 having a substantially circular cross section is formed at the center and a step 14 is formed on an end face of the opening 13. Is turned upward, and the step 1 of the frame member 15 is
The glass container 1 is placed with the 4 and the outer peripheral portion (flange) locked. The frame member 15 on which the glass container 1 is placed is shown in FIG.
(A) As shown in (b), it is incorporated in a pedestal main body 33 made of ceramic such as diatomaceous earth. Pedestal body 33
A pair of substantially L-shaped levers 18 are rotatably disposed on a shaft 18a on the upper surface of the lever 18, and one arm 19 of the lever 18 has an elongated hole 21 formed therein. A pair of support members 17 each having a tapered surface 16 at the tip are mounted on the upper surface of the frame member 15, and guides 34 for regulating the movement direction of the support members 17 are provided on the upper surface of the jig body 33 on both sides of each support member 17. It is arranged. Here, since the pin 17 a protruding from the upper surface of the support member 17 is inserted into the long hole 21 of the lever 19, the support member 17 is moved along the guide 34 by rotating the lever 18. Can be moved back and forth in a direction parallel to the upper surface of the.

The front glass 2 is placed on the support member 17. At this time, a gap of about several cm is provided between the glass container 1 and the front glass 2 by the support member 17.
Thereafter, a substantially annular holding member 22 is provided on the upper surface of the front glass 2.
Is placed, and a constant pressure of about 35 g / cm ² is applied to a portion where the glass container 1 and the front glass 2 are welded by the pressing member 22 when the glass container 1 and the front glass 2 are welded. A positioning member 29 is provided on the upper surface of the pedestal body 33 along the outer periphery of the front glass 2, which will be described later. Is prevented from shifting.

Here, the frame member 15 and the pressing member 22
Are made of stainless steel, and both members 1
A release agent is applied to the surfaces of the glass containers 5 and 22 so that the glass container 1 and the front glass 2 can be easily separated. In this embodiment, the material of the frame member 15 and the holding member 22 is stainless steel. However, the material of the two members 15 and 22 is not limited to stainless steel.
May be formed from a metal other than stainless steel. And
By forming both members 15 and 22 from metal, the heat capacity of both members 15 and 22 is increased, and the glass container 1 and the front glass 2 are easily welded. Further, the vertical relationship between the glass container 1 and the front glass 2 shown in FIG. 3 may be reversed.

Thereafter, as shown in FIG.
Nozzle 30 through a gap provided between
And the phosphor is emitted from the nozzle 30, and the upper surface of the glass container 1 and the lower surface of the front glass 2 are spray-coated simultaneously with the phosphor. By the way, FIG.
As shown in (b), substantially semicircular mask pieces 31, 31 are provided on the upper and lower surfaces of the support member 17, respectively, and the support members 17, 17 are moved to the center side of the frame member 15, and the mask pieces are moved. When the tip portions of the first and second contact portions are brought into contact with each other, a pair of mask pieces 31 and the first and second annular shielding portions respectively shield portions (that is, outer peripheral portions) where the glass container 1 and the front glass 2 are welded. Means mask 3
2, 32 are formed. Then, the masks 32, 32
As a result, the outer peripheral portions of the glass container 1 and the front glass 2 are respectively covered, so that the phosphor does not adhere to the outer peripheral portions of the glass container 1 and the front glass 2. If a phosphor adheres to a portion where the glass container 1 and the front glass 2 are welded, there is a possibility that a vacuum cannot be maintained when the glass container 1 and the front glass 2 are welded by the attached phosphor. Since the portion where the front glass 2 is welded is covered with the mask 32, the glass container 1 and the front glass 2 can be welded in an airtight manner. In addition, glass container 1
In addition, since the front glass 2 is welded only at the outer peripheral portion and the partition 4 on the center side of the glass container 1 is not welded to the front glass 2, there is no need to remove the phosphor attached to the partition 4 on the center side of the glass container 1. .

Then, the glass container 1 and the front glass 2
After the phosphors respectively applied to the glass container 1 are dried, the work W including the glass container 1 and the front glass 2 combined as described above is heated in the furnace (electric furnace) 23 shown in FIG. FIG. 7 is a view of the conveyor furnace 23 as viewed from above, and the workpiece W moves on the belt 25 as shown in FIG. The insides of the heating furnaces 24a and 24b are heated to a predetermined temperature by heating means (not shown), and the temperature differs depending on the location as shown in FIG.

First, when the work W enters the heating furnace 24a,
In the region A1 of the heating furnace 24a, the ambient temperature of the work W is heated to about 525 ° C., and the phosphor applied to the glass container 1 and the front glass 2 is fired. Thereafter, when the work W rides on the belt 25 and goes out of the heating furnace 24a, the operator operates the other arm 20 of the lever 18 to rotate the lever 18 so that the support member 1 is rotated.
7 is moved away from the opening 13. When the support member 17 moves away from the opening 13, the front glass 2 and the pressing member 22 slide down along the tapered surface 16 of the support member 17, and the glass container 1 and the front glass 2 come into direct contact. Since the tapered surface 16 is formed with a groove 16a running along the inclined direction, the front glass 2
When the pressing member 22 slides down the tapered surface 16, the front glass 2 is supported by the end face of the groove 16 a, and the state of the front glass 2 and the pressing member 22 is stabilized.

At this time, about 35 g / g is applied to the portion where the glass container 1 and the front glass 2 are welded by the pressing member 22.
A constant pressure of ² cm ² is applied, and the position where the glass member 1 and the front glass 2 are welded can be accurately positioned. In the present embodiment, a constant pressure of about 35 g / cm ² is applied to a portion where the glass container 1 and the front glass 2 are welded. However, the above-mentioned constant pressure is not limited to about 35 g / cm ^2. , The constant pressure is about 10 g /
cm ² or more, the portion where the glass container 1 and the front glass 2 are welded has irregularities.
Even if the glass and the front glass 2 are not in uniform contact, the glass container 1 and the front glass 2 can be deformed and welded uniformly, and the constant pressure can be reduced to about 50 g / cm ^2.
By performing the following, it is possible to prevent the welding location of the glass container 1 and the front glass 2 from being excessively deformed.

Thereafter, when the work W enters the heating furnace 24b on the belt 25, the ambient temperature of the work W rises to about 760 ° C. in the area A2 of the heating furnace 24b, and the work W is heated at this temperature for about 10 minutes. , Glass container 1 and front glass 2
And are integrated. The ambient temperature at the time of welding the glass container 1 and the front glass 2 may be a temperature higher than the softening point of the glass (for example, about 680 ° C. in the case of soda-lime glass). The ambient temperature at the time of welding greatly varies depending on the heating time, but when the heating time is about 10 minutes, the ambient temperature is desirably about 760 ° C.

On the other hand, after the filament 9 is attached to the stem 8 provided with the exhaust pipe 7, the stem 8 is attached to the end of the tube 10 by, for example, a gas burner while the filament 9 is housed in the tube 10. It is formed by heating and sealing. Then, after welding the glass container 1 and the front glass 2, the tube 10 is attached to the periphery of the hole 6 of the glass container 1, and the frit applied to the end surface of the tube 10 is fired, so that the electrode portion 3 is attached to the glass container 1. Fixed to. Then, air in a space surrounded by the glass container 1 and the front glass 2 is exhausted from the exhaust pipe 7, and after filling a rare gas into this space, the exhaust pipe 7 is sealed to form a flat fluorescent lamp. You.

For example, when the glass container 1 has a shape as shown in FIG. 2 and its outer shape is about 80 mm, the volume of the space surrounded by the glass container 1 and the front glass 2 is about 10 cc.
In order to bake the phosphor applied to the glass container 1 and the front glass 2, that is, to reduce the amount of oxygen required for burning the organic solvent contained in the phosphor, the phosphor is sufficiently baked. It is necessary to circulate air over the surfaces of the glass container 1 and the front glass 2. Therefore,
In this embodiment, when firing the phosphor applied to the glass container 1 and the front glass 2 respectively, the glass container 1
Since the support member 17 is interposed between the glass container 1 and the front glass 2, and a gap is provided between the glass container 1 and the front glass 2,
Oxygen required for firing the phosphor is supplied from the gap, and the phosphor applied to the glass container 1 and the front glass 2 can be sufficiently fired.

As described above, in the present embodiment, the steps of simultaneously applying the phosphor to the glass container 1 and the front glass 2, firing the phosphor applied to the glass container 1 and the front glass 2, Container 1 and front glass 2
And the step of welding are continuously performed, so that the phosphor is applied to the glass container 1 and the front glass 2 in separate steps.
Compared to firing, the number of manufacturing processes can be reduced,
In addition, since the frit is applied only to the joint between the glass container 1 and the electrode part 3, the color of the frit is not noticeable. In addition, compared to the case where frit is applied to two places, that is, the joint between the glass container 1 and the front glass 2 and the joint between the glass container 1 and the electrode part 3, only one step of applying the frit is required. Since the number of steps can be reduced, the time required for manufacturing the lamp can be shortened, the number of lamps that can be manufactured in the same time increases, and the manufacturing cost can be reduced. Further, since no frit is used to join the glass container 1 and the front glass 2, no gap is generated between the glass container 1 and the front glass 2 due to the thickness of the frit. Since it is not necessary to increase the surface accuracy of the front glass 2 in order to prevent a short-circuit current from flowing through a gap formed therebetween,
The manufacturing cost of the front glass 2 can be reduced, and no shear stress is generated in the front glass 2. In addition, in order to prevent a short circuit current from flowing through a gap between the glass container 1 and the front glass 2, the width of the partition 4 separating the grooves 5 provided in the glass container 1 is increased. Since it is not necessary to reduce the size of the lamp, the width of the non-lighted partition 4 can be reduced, so that the appearance of the lamp is improved. (Embodiment 2) In Embodiment 1, two heating furnaces 24a,
Using a conveyor furnace 23 having 24b, the glass container 1
Although the firing of the phosphor applied to the front glass 2 and the welding of the glass container 1 and the front glass 2 were performed, in the present embodiment, as shown in FIG. 10, a conveyor furnace including only one heating furnace 24. 23 is used to fire the phosphor and weld the glass container and the front glass. Since the configuration of the flat fluorescent lamp is the same as that of the first embodiment,
The description is omitted. The steps other than the step of firing the phosphor and the step of fusing the glass container 1 and the front glass 2 are the same as those in the first embodiment, and a description thereof will be omitted.

The inside of a heating furnace 24 for firing the phosphor and welding the glass container 1 and the front glass 2 is heated to a predetermined temperature by a heating means (not shown) such as a heater, as shown in FIG. The temperature inside differs depending on the location. Here, in the region A4 of the heating furnace 24, the internal temperature is heated to a temperature at which the phosphor is baked (for example, about 525 ° C.). The temperature is set to a temperature at which the front glass 2 is welded (for example, about 760 ° C.).

As in the first embodiment, the frame member 15 on which the glass container 1 is mounted is incorporated in the pedestal main body 33, and the front glass 2 and the pressing member 22 are mounted on the glass container 1 via the support member 17. You. As shown in FIGS. 12A and 12B, a pair of substantially L-shaped levers 18 are disposed on the upper surface of the pedestal main body 33 so as to be rotatable about a shaft 18 a. A long hole 21 is formed in the arm 19. A pair of support members 17 each having a tapered surface 16 at the tip are mounted on the upper surface of the frame member 15, and guides 34 for regulating the movement direction of the support members 17 are provided on the upper surface of the jig body 33 on both sides of each support member 17. It is arranged. Here, since the pin 17 a protruding from the upper surface of the support member 17 is inserted into the long hole 21 of the lever 19, the support member 17 is moved along the guide 34 by rotating the lever 18. Can be moved back and forth in a direction parallel to the upper surface of the. Further, in the area A5 of the heating furnace 24, the work W including the glass container 1 and the front glass 2 combined in the state shown in FIG. A pole 26 is provided.

Hereinafter, a method of manufacturing a flat fluorescent lamp will be briefly described.

After applying a phosphor to the glass container 1 and the front glass 2 in the same manner as in the first embodiment, and drying the phosphor, the work W is placed on the belt 25, placed in the conveyor furnace 23, and fired. And a step of welding the glass container 1 and the front glass 2.

When the work W enters the heating furnace 24, the ambient temperature of the work W becomes about 525 in the area A4 of the heating furnace 24.
The phosphor applied to the glass container 1 and the front glass 2 is fired by being heated to ℃. Then, FIG.
As shown in (a), when the work W rides on the belt 25 and moves in the area A5 of the heating furnace 24 in the direction of arrow B, the arm 20 of the lever 18 is moved to the pole 26 provided in the heating furnace 24.
And the lever 18 rotates. When the lever 18 rotates, the support member 17 moves away from the opening 13 [FIG.
2 (b) in the direction of arrow C], the front glass 2 and the pressing member 22 move down along the tapered surface 16 of the support member 17, and the support member 17 moves to the position shown in FIG. The glass container 1 and the front glass 2 are in direct contact. Note that the front glass 2 is provided on the upper surface of the base body 33.
A positioning member 29 is provided along the outer periphery of the front glass 2, and the positioning of the front glass is prevented from being shifted by bringing the positioning member 29 into contact with the side peripheral surface of the front glass 2.

Thereafter, the work W rides on the belt 25,
When the work W moves to the area A6 of the heating furnace 24, the ambient temperature of the work W rises to about 760 ° C., and the work is heated at this temperature for about 10 minutes, so that the glass container 1 and the front glass 2 are welded and integrated.

After firing of the phosphor and welding of the glass container 1 and the front glass 2, the tube 10 of the electrode portion 3 is attached to the periphery of the hole 6 of the glass container 1 and applied to the end surface of the tube 10. The frit thus obtained is fired to fix the electrode portion 3 to the glass container 1. And the glass container 1
Air in a space surrounded by the front glass 2 and the front glass 2 is exhausted from the exhaust pipe 7, and after filling a rare gas into this space, the exhaust pipe 7 is sealed to form a flat fluorescent lamp. (Embodiment 3) In Embodiment 1, with the support member 17 interposed between the glass container 1 and the front glass 2, the phosphor applied to the glass container 1 and the front glass 2 is fired, Although the member 17 is removed and the glass container 1 and the front glass 2 are brought into direct contact with each other to weld the glass container 1 and the front glass 2, in this embodiment, the phosphor is simultaneously applied to the glass container 1 and the front glass 2. After applying and drying,
In a state where the glass container 1 and the front glass 2 are in direct contact with each other, firing of the phosphor applied to the glass container 1 and the front glass 2 and welding of the glass container 1 and the front glass 2 are performed. The configuration of the flat fluorescent lamp is the same as that of the first embodiment, and a description thereof will be omitted.

As shown in FIG. 13 (a), the surface in which the groove 5 is formed on the frame member 15 in which the step portion 14 is formed in the end surface of the opening 13 which is substantially annular and has a substantially circular cross section is turned upward. The glass container 1 is placed. At this time, the outer peripheral portion of the glass container 1 is locked with the step portion 14 of the frame member 15. Then, the first embodiment
Similarly to the above, the glass container 1 is provided via a support member (not shown) for providing a gap between the glass container 1 and the front glass 2.
The front glass 2 is placed on the top, and the substantially annular holding member 22 is placed on the front glass 2. Here, the frame member 15 and the pressing member 22 are each formed of stainless steel, and a release agent is applied to the surface. Then, the nozzle is inserted from the gap provided between the glass container 1 and the front glass 2 by the support member, and the glass container 1 is inserted from the nozzle.
13 and the front glass 2 are simultaneously spray-coated with the phosphor, and the phosphor applied to the glass container 1 and the front glass 2 is dried.
The glass container 1 and the front glass 2 are brought into direct contact as shown in FIG. Note that the vertical relationship between the glass container 1 and the front glass 2 shown in FIG. 13B may be reversed. In this case, the pedestal is constituted by the holding member 22 and the frame member 1
5 constitutes a pressing member.

Glass container 1 combined as described above
The work W including the front glass 2 is placed in the conveyor furnace 23 described in the second embodiment, and the steps of firing the phosphor and welding the glass container 1 and the front glass 2 are performed. Although the conveyor furnace 23 has substantially the same configuration as that of the second embodiment, in this embodiment, the glass container 1 and the front glass 2 are put in the conveyor furnace 23 in a directly assembled state, and There is no support member 17 interposed between the glass 2 and there is no need to provide a pole 26 in the conveyor furnace 23 for hitting the lever 18.

First, when the work W enters the heating furnace 24 of the conveyor furnace 23, the ambient temperature of the work W is heated to about 525 ° C. in the area A4 of the heating furnace 24, and the work W is applied to the glass container 1 and the front glass 2, respectively. The burned phosphor is fired. In the area A4 of the heating furnace 24, as shown by an arrow D in FIG. 14, air is forcibly circulated from one hole 6 of the glass container 1 to a space surrounded by the glass container 1 and the front glass 2. A blower (not shown) is provided, and the blower supplies oxygen necessary for baking the phosphor applied to the glass container 1 and the front glass 2 respectively.

Thereafter, when the workpiece W moves on the belt 25 to the area A5 of the heating furnace 24, the blowing by the blowing means is stopped, and when the workpiece W further moves to the area A6 of the heating furnace 24,
The ambient temperature of the work W rises to about 760 ° C. and is heated at this temperature for about 10 minutes to weld and integrate the glass container 1 and the front glass 2.

After firing of the phosphor and welding of the glass container 1 and the front glass 2, the tube 10 of the electrode portion 3 is attached to the periphery of the hole 6 of the glass container 1 and applied to the end surface of the tube 10. The frit thus obtained is fired to fix the electrode portion 3 to the glass container 1. And the glass container 1
Air in a space surrounded by the front glass 2 and the front glass 2 is exhausted from the exhaust pipe 7, and after filling a rare gas into this space, the exhaust pipe 7 is sealed to form a flat fluorescent lamp.

As described above, in this embodiment, the glass container 1 and the front glass 2 are put in the conveyor furnace 23 in a state of being in direct contact with each other, and the phosphor is baked and the glass container 1 and the front glass 2 are welded. And a supporting member 1 interposed between the glass container 1 and the front glass 2.
7 and a movable part including a lever 18 for driving the support member 17 are unnecessary. When a movable part such as the lever 18 is operated in a high-temperature environment, the reliability may decrease over time due to thermal expansion or oxidation, but in this embodiment, the glass container 1 and the front glass 2 are directly connected to each other. By putting it in the conveyor furnace 23 in the contact state, it is possible to eliminate movable parts such as the lever 18 which may reduce the reliability. (Embodiment 4) In each of the above embodiments, the phosphor is applied to the glass container 1 and the front glass 2 in a state where a gap is provided between the glass container 1 and the front glass 2. In this example, a phosphor is applied to the glass container 1 and the front glass 2 while the glass container 1 and the front glass 2 are in direct contact with each other. The configuration of the flat fluorescent lamp is the same as that of the first embodiment, and a description thereof will be omitted.

Hereinafter, a method of manufacturing the flat fluorescent lamp of the present embodiment will be described.

As shown in FIGS. 13 (a) and 13 (b), the surface in which the groove 5 is formed on the frame member 15 in which the step portion 14 is formed on the end surface of the opening 13 which is substantially annular and has a substantially circular cross section. The glass container 1 is placed facing upward. At this time, the outer peripheral portion of the glass container 1 is locked with the step portion 14 of the frame member 15. After that, the front glass 2 is placed on the glass container 1, and the substantially annular holding member 22 is further placed on the front glass 2. Here, the frame member 15 and the pressing member 22 are each formed of stainless steel, and a release agent is applied to the surface. The pressing member 22 applies a constant pressure of about 35 g / cm ² to a portion where the glass container 1 and the front glass 2 are welded. Note that the vertical relationship between the glass container 1 and the front glass 2 shown in FIG.
In this case, the pedestal is constituted by the holding member 22, and the holding member is constituted by the frame member 15.

Then, the glass container 1 and the front glass 2
In a state in which the phosphors are directly combined, the phosphor is flowed together with nitrogen gas from one of the holes 6 into a space surrounded by the glass container 1 and the front glass 2, and the phosphor is applied to important portions of the glass container 1 and the front glass 2. Apply (electrostatic coating) and dry.

The work W including the glass container 1 and the front glass 2 combined in this way is placed in the conveyor furnace 23 described in the second embodiment, and the phosphor is baked. 2 is welded. Note that the conveyor furnace 23 has substantially the same configuration as that of the second embodiment, but in this embodiment, the glass container 1 and the front glass 2 are put in the conveyor furnace 23 in a directly assembled state, and The support member 17 is not interposed between the glass 1 and the
There is no need to provide poles 26 in conveyor furnace 23 for hitting 8.

First, when the work W enters the heating furnace 24 of the conveyor furnace 23, the ambient temperature of the work W is heated to about 525 ° C. in the area A4 of the heating furnace 24, and the work W is applied to the glass container 1 and the front glass 2, respectively. The burned phosphor is fired. In the area A4 of the heating furnace 24, as shown by an arrow D in FIG. 14, air is forcibly circulated from one hole 6 of the glass container 1 to a space surrounded by the glass container 1 and the front glass 2. A blower (not shown) is provided, and the blower supplies oxygen necessary for baking the phosphor applied to the glass container 1 and the front glass 2 respectively.

Thereafter, when the workpiece W moves on the belt 25 to the area A5 of the heating furnace 24, the blowing by the blowing means is stopped, and when the workpiece W further moves to the area A6 of the heating furnace 24,
The ambient temperature of the work W rises to about 760 ° C. and is heated at this temperature for about 10 minutes to weld and integrate the glass container 1 and the front glass 2.

After firing of the phosphor and welding of the glass container 1 and the front glass 2, the tube 10 of the electrode portion 3 is attached to the periphery of the hole 6 of the glass container 1 and applied to the end surface of the tube 10. The frit thus obtained is fired to fix the electrode portion 3 to the glass container 1. And the glass container 1
Air in a space surrounded by the front glass 2 and the front glass 2 is exhausted from the exhaust pipe 7, and after filling a rare gas into this space, the exhaust pipe 7 is sealed to form a flat fluorescent lamp.

As described above, in this embodiment, the phosphor is applied to each of the glass container 1 and the front glass 2 in a state where the glass container 1 and the front glass 2 are directly combined and positioned so as to be weldable. Therefore, Embodiment 1
After coating or baking the phosphor in a state where a gap is provided between the glass container 1 and the front glass 2 as shown in FIGS.
There is no need to move the front glass 2 to the glass container 1 side to directly contact the glass container 1 and the front glass 2, so that a highly accurate manufacturing method with high positioning accuracy can be realized.

In the above-described embodiments, the temperature for firing the phosphor and the temperature for welding the glass container 1 and the front glass 2 are not limited to the above-mentioned temperatures, but are limited to the conditions such as the material and the heating time. Of course, it may be changed in accordance with Further, although the material of the glass container 1 and the front glass 2 is soda-lime glass, both materials are not intended to be limited to soda-lime glass, and both materials may be soft glass such as lead glass. Of course.

[0055]

As described above, according to the first aspect of the present invention, a spiral groove serving as a discharge space is formed on the surface of the flat plate, and holes are formed at both ends of the groove. Heating the ambient temperature to near the softening point in a state where the glass container to which the body is attached, the step of applying the phosphor simultaneously with the glass container, the step of firing the phosphor, and the glass container are airtight to the glass container. And a glass in which a front glass having an electrode for electron emission and having a phosphor attached thereto is sealed. A step of simultaneously applying a phosphor to the glass container and the front glass; a step of firing the phosphor applied to the glass container and the front glass; Weld container and windshield By continuously performing the steps described above, the number of manufacturing steps can be reduced as compared with the case where the phosphor is applied and baked on the glass container and the front glass in separate steps, and furthermore, the bonding portion between the glass container and the electrode portion can be reduced. Since only the frit is applied, the color of the frit is not conspicuous, and the frit is applied to two portions, that is, the joint portion of the glass container and the front glass and the joint portion of the glass container and the electrode portion as in the conventional example. Compared to the case, the process of applying the frit is performed only once, and the number of manufacturing processes can be reduced.
The time required for manufacturing the lamp is reduced, the number of lamps that can be manufactured within the same time increases, and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced, and further, there is an effect that no shear stress is generated in the front glass. In addition, there is no need to increase the width of the partition between the grooves provided in the glass container in order to prevent short-circuit current from flowing through the gap between the glass container and the front glass. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the lamp can be improved in appearance.

According to a second aspect of the present invention, there is provided a glass plate in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent material is adhered to important places. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a step of simultaneously applying a phosphor to the glass container and the front glass, a step of firing the phosphor applied to the glass container and the front glass, and heating in a state where the glass container and the front glass are combined. After continuously performing the step of hermetically welding the glass container and the front glass, the electrode portion is sealed with a frit in the hole of the glass container in a state where the front glass is welded,
The step of simultaneously applying the phosphor to the glass container and the front glass, the step of baking the phosphor applied to the glass container and the front glass, and the step of fusing the glass container and the front glass are continuously performed to obtain glass. Compared to the case where the phosphor is applied and baked on the container and the front glass in separate steps, the manufacturing process can be reduced, and the frit is applied only to the joint between the glass container and the electrode. Color is not conspicuous, compared to the case where the frit is applied to two places of the joining part of the glass container and the front glass and the joining part of the glass container and the electrode part as in the conventional example, Since the number of manufacturing steps can be reduced by only one time, the time required for manufacturing the lamp is reduced, and the number of lamps that can be manufactured in the same There is an effect that the cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced, and further, there is an effect that no shear stress is generated in the front glass. In addition, there is no need to increase the width of the partition between the grooves provided in the glass container in order to prevent short-circuit current from flowing through the gap between the glass container and the front glass. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the lamp can be improved in appearance.

The third to twelfth aspects of the present invention are desirable embodiments of the second aspect of the invention, and have the same effects as the second aspect of the invention.

According to a fourteenth aspect of the present invention, there is provided a glass plate in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent material is adhered to important places. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container having a spiral groove formed on the surface is placed on a stainless steel base coated with a release agent with the surface with the groove formed facing upward,
A portion of the glass container to be welded to the front glass is shielded by the first shielding means, and a portion of the glass to be welded to the glass container is shielded by the second shielding means to provide a gap between the front glass and the glass container. Placed on the glass container via the support member of the above, a stainless steel holding member coated on the surface with a release agent is placed on the front glass, the gap provided between the glass container and the front glass The nozzle for applying the phosphor is inserted from the above, the phosphor is simultaneously spray-coated on the glass container and the front glass by the nozzle, and the phosphor applied to the glass container and the front glass is dried, and then the glass container and the front glass are dried. Ambient temperature of about 525
After heating to ℃ and simultaneously firing the phosphor applied to the glass container and the front glass, the support member interposed between the glass container and the front glass is removed, and the glass container and the front glass are brought into direct contact. About 35 g / c at the part where the glass container and the front glass are welded by the holding member.
m ² pressure and ambient temperature to about 760 ° C.
After welding the glass container and the front glass, attach the electrode part to the hole of the glass container where the front glass is welded, apply a frit to the joint between the glass container and the electrode part, and heat the joint to about 450 ° C. The electrode portion is sealed in the hole, and the invention according to claim 15 is characterized in that a spiral groove serving as a discharge space is formed on the surface of the plate and the hole is formed at both ends of the groove. A glass container which is formed and has a phosphor adhered to a key point, a flat front glass on which the phosphor is adhered and sealed to the glass container, and a hole in the glass container which has an electrode for emitting electrons and is sealed. In manufacturing a flat fluorescent lamp comprising an electrode part to be attached, a front glass is placed on a stainless steel pedestal whose surface is coated with a release agent, and the front glass is welded to a glass container. Is shielded by the first shielding means, and the front glass The glass container whose portion to be welded is shielded by the second shielding means is placed on the front glass via a support member for providing a gap between the glass container and the front glass with the surface having the spiral groove formed downward. Nozzle for placing a stainless steel holding member with a release agent applied on its surface on a glass container, and applying a phosphor through a gap provided between the glass container and the front glass , And the phosphor is simultaneously spray-coated on the glass container and the front glass by a nozzle, and the phosphor applied to the glass container and the front glass is dried. Then, the ambient temperature of the glass container and the front glass is heated to about 525 ° C. Then, after simultaneously sintering the phosphor applied to the glass container and the front glass, the supporting member interposed between the glass container and the front glass is removed, and the glass container and the front glass are removed. Contacting the front glass directly, a pressure of about 35 g / cm ² at the site to be welded of the glass container and the front glass was added by the pressing member,
After heating the ambient temperature to about 760 ° C to weld the glass container and the front glass, attach the electrode to the hole of the glass container to which the front glass is welded, and apply frit to the joint between the glass container and the electrode. And heating the joint to about 450 ° C. to seal the electrode to the hole, and simultaneously applying the phosphor to the glass container and the front glass as in the invention of claim 2. By continuously performing the step of firing the phosphor applied to the glass container and the front glass and the step of welding the glass container and the front glass, the phosphor is applied to the glass container and the front glass in separate steps. As compared with the case of firing, the number of manufacturing steps can be reduced, and since the frit is applied only to the joint between the glass container and the electrode portion, the color of the frit is not noticeable, Compared to the case where the frit is applied to two places of the joint between the glass container and the front glass and the joint between the glass container and the electrode as in the conventional example, the process of applying the frit is performed only once, and the manufacturing process is reduced. Can reduce the time required to manufacture the lamp,
There is an effect that the number of lamps that can be manufactured in the same time increases and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass,
A gap is not generated between the glass container and the front glass due to the thickness of the frit, and the surface accuracy of the front glass is increased to prevent a short circuit current from flowing through the gap between the glass container and the front glass. Since there is no need, there is an effect that the manufacturing cost of the front glass can be reduced and no shear stress is generated in the front glass. In addition, there is no need to increase the width of the partition between the grooves provided in the glass container in order to prevent short-circuit current from flowing through the gap between the glass container and the front glass. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the lamp can be improved in appearance.

The invention of claim 16 is the invention of claim 14 or 15
Claim 14 or Claim 15, which is a preferred embodiment of the present invention.
The same operation and effect as those of the invention can be obtained.

According to a seventeenth aspect of the present invention, the phosphor is applied to each of the glass container and the front glass with the supporting member interposed between the glass container and the front glass, and the phosphor is applied to the glass container and the front glass, respectively. After the phosphor has been dried, the supporting member is removed, and the glass container and the front glass are brought into direct contact with each other, and the phosphor applied to the glass container and the front glass is fired, and the glass container and the front glass are fired. It is characterized by performing welding, in a state where the support member is removed and the glass container and the front glass are in direct contact, the step of firing the phosphor and the step of welding the glass container and the front glass are performed, Compared to the case where the support member is removed after the phosphor is fired and the glass container and the front glass are brought into direct contact, the support member is removed under a high temperature environment and the glass container and Becomes unnecessary moving parts contacting the surface glass, the reliability of the movable portion in factors such as thermal expansion or oxidation there is an effect that can be prevented.

The invention of claim 18 is a glass in which a spiral groove serving as a discharge space is formed on the surface of the flat plate, and holes are formed at both ends of the groove, and a fluorescent material is adhered to important points. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container with a spiral groove formed on the surface is placed on a stainless steel base coated with a release agent with the surface with the groove formed facing upward,
A portion of the glass container to be welded to the front glass is shielded by the first shielding means, and a portion of the glass to be welded to the glass container is shielded by the second shielding means to provide a gap between the front glass and the glass container. Placed on the glass container via the support member of the above, a stainless steel holding member coated on the surface with a release agent is placed on the front glass, the gap provided between the glass container and the front glass After inserting the nozzle for applying the phosphor from the, the phosphor is simultaneously spray-coated on the glass container and the front glass by the nozzle, and the phosphor applied on the glass container and the front glass is dried, and then the glass container and the front glass are dried. The glass container and the front glass are brought into direct contact with each other by removing the supporting member interposed between the glass container and the front glass. After addition the pressure of g / cm ^2, while flowing air in the vicinity of the site of the glass container and the front glass on which phosphors are coated respectively, to heat the ambient temperature of the glass container and the front glass to about 525 ° C., a glass After simultaneously firing the phosphor applied to the container and the front glass, the flow of air is stopped near the glass container and the front glass where the phosphor is applied, and the ambient temperature is increased to about 760 ° C. The glass container and the front glass are welded, the electrode is attached to the hole of the glass container to which the front glass is welded, a frit is applied to the joint between the glass container and the electrode, and the above joint is heated to about 450 ° C. The electrode portion is sealed in the hole, and the invention according to claim 19 is characterized in that a spiral groove serving as a discharge space is formed on the surface of the plate and the hole is formed at both ends of the groove. Formation A glass container in which a phosphor is attached to a key point, a flat front glass in which the phosphor is attached and sealed in the glass container, and an electrode for electron emission, which is sealed in a hole of the glass container. In manufacturing a flat-type fluorescent lamp composed of an electrode part to be formed, a front glass is placed on a stainless steel pedestal whose surface is coated with a release agent, and the front glass is welded to a glass container. A part of the glass container whose part is sealed by the first shielding means and whose part to be welded to the front glass is shielded by the second shielding means is turned downward so that the surface where the spiral groove is formed faces downward. Placed on the front glass via a support member for providing a gap, a stainless steel holding member coated with a release agent on the surface is placed on the glass container, and between the glass container and the front glass. Nozzle for applying phosphor from the gap provided in , The phosphor is simultaneously spray-coated on the glass container and the front glass by a nozzle, and the phosphor applied to the glass container and the front glass is dried, and then the support interposed between the glass container and the front glass is dried. After removing the member, the glass container and the front glass are brought into direct contact with each other, and a pressure of about 35 g / cm ² is applied to a portion where the glass container and the front glass are welded by the pressing member.
The surrounding temperature of the glass container and the front glass is heated to about 525 ° C. while flowing air near the portions of the glass container and the front glass to which the phosphor has been applied, respectively, and the phosphor applied to the glass container and the front glass is cooled. At the same time, after the firing, the air was stopped from flowing near the portions of the glass container and the front glass to which the phosphors were applied, and the ambient temperature was heated to about 760 ° C. to weld the glass container and the front glass, Attach the electrode to the hole of the glass container where the glass is welded, apply a frit to the joint between the glass container and the electrode, heat the joint to about 450 ° C., and seal the electrode to the hole. Wherein the phosphor is simultaneously applied to the glass container and the front glass, and the phosphor is applied to the glass container and the front glass. By performing the step of firing and the step of welding the glass container and the front glass continuously,
Compared to the case where the phosphor is applied to the glass container and the front glass in separate steps, the manufacturing process can be reduced compared to the case where the phosphor is fired, and the frit is applied only to the joint between the glass container and the electrode part, A step of applying a frit as compared to a case where a frit is applied to two places, that is, a joint portion of a glass container and a front glass and a joint portion of a glass container and an electrode portion as in the conventional example, in which the color of the frit is not noticeable. Is performed only once, and the manufacturing process can be reduced.
The time required for manufacturing the lamp is reduced, the number of lamps that can be manufactured within the same time increases, and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced, and further, there is an effect that no shear stress is generated in the front glass. In addition, there is no need to increase the width of the partition between the grooves provided in the glass container in order to prevent short-circuit current from flowing through the gap between the glass container and the front glass. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the lamp can be improved in appearance. In addition, the step of firing the phosphor and the step of welding the glass container and the front glass are performed in a state where the support member is removed and the glass container and the front glass are in direct contact with each other. The movable part for contacting the glass container and the front glass in a high-temperature environment is unnecessary compared to the case where the glass container and the front glass are directly contacted by removing the glass container, and the reliability of the movable part due to factors such as thermal expansion and oxidation Has the effect of preventing a decrease in

According to a twentieth aspect of the present invention, the phosphor is simultaneously applied to the glass container and the front glass in a state where the glass container and the front glass are brought into direct contact, and the phosphor applied to the glass container and the front glass is dried. After letting
It is characterized in that firing of the phosphor and welding of the glass container and the front glass are performed, and in a state where the glass container and the front glass are positioned, coating and firing of the phosphor and welding of the glass container and the front glass are performed. Therefore, there is an effect that the lamp can be manufactured with high accuracy.

According to a twenty-first aspect of the present invention, there is provided a glass plate in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent material is adhered to important places. A flat fluorescent plate comprising a container, a flat front glass on which a phosphor is attached and sealed in a glass container, and an electrode portion having electrodes for electron emission and sealed in a hole in the glass container. In manufacturing the lamp, a glass container having a spiral groove formed on the surface is placed on a stainless steel base coated with a release agent with the surface with the groove formed facing upward,
The front glass is placed on the glass container, and a stainless steel holding member coated with a release agent on the surface is placed on the front glass, and the holding member is attached to a portion where the glass container and the front glass are welded. After applying a pressure of 35 g / cm ² and flowing the phosphor together with nitrogen gas through a hole formed in the glass container into a space surrounded by the glass container and the front glass, and applying the phosphor, the phosphor is applied. While flowing air near the glass container and the front glass
The surrounding temperature of the glass container and the front glass is heated to about 525 ° C., and the phosphors applied to the glass container and the front glass are simultaneously fired. The flow of air was stopped, the temperature was increased to about 760 ° C. for about 10 minutes, the glass container and the front glass were welded, and the electrode portion was attached to the hole of the glass container to which the front glass was welded. Applying a frit to the joint with the part, heating the joint to about 450 ° C., and sealing the electrode part in the hole, simultaneously applying a phosphor to the glass container and the front glass; and By continuously performing the step of firing the phosphor applied to the glass container and the front glass and the step of fusing the glass container and the front glass,
Compared to the case where the phosphor is applied to the glass container and the front glass in separate steps, the manufacturing process can be reduced compared to the case where the phosphor is fired, and the frit is applied only to the joint between the glass container and the electrode part, A step of applying a frit as compared to a case where a frit is applied to two places, that is, a joint portion of a glass container and a front glass and a joint portion of a glass container and an electrode portion as in the conventional example, in which the color of the frit is not noticeable. Is performed only once, and the manufacturing process can be reduced.
The time required for manufacturing the lamp is reduced, the number of lamps that can be manufactured within the same time increases, and the manufacturing cost can be reduced. Furthermore, since no frit is used to join the glass container and the front glass, there is no gap between the glass container and the front glass due to the thickness of the frit, and short-circuit current flows from the gap between the glass container and the front glass. It is not necessary to increase the surface accuracy of the front glass in order to prevent the flow of water, so that the manufacturing cost of the front glass can be reduced, and further, there is an effect that no shear stress is generated in the front glass. In addition, there is no need to increase the width of the partition between the grooves provided in the glass container in order to prevent short-circuit current from flowing through the gap between the glass container and the front glass. The size of the lamp can be reduced, and the width of the non-lighted partition can be reduced, so that the lamp can be improved in appearance. Further, the phosphor is applied and fired in a state where the glass container and the front glass are directly in contact with each other, and the glass container and the front glass are welded. Since the firing and the welding of the glass container and the front glass are performed, the lamp can be manufactured with high accuracy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a flat fluorescent lamp according to a first embodiment.

FIG. 2 is a top view showing the glass container.

FIG. 3 is a fragmentary cross-sectional view showing a manufacturing step of the same.

FIG. 4 is a fragmentary cross-sectional view for explaining another manufacturing step of the above.

FIGS. 5A and 5B are perspective views showing a supporting member used in the embodiment, and FIG. 5A is a partially omitted perspective view and FIG.

6A and 6B show a state in which a frame member is attached to the jig main body used in the above, wherein FIG. 6A is a top view and FIG. 6B is a sectional view.

FIG. 7 is a top view of the conveyor furnace used in the same.

FIG. 8 is a diagram showing the relationship between the location of a conveyor furnace and temperature in the same.

FIG. 9 is an explanatory diagram illustrating a manufacturing process of the above.

FIG. 10 is a top view of a conveyor furnace used in the flat fluorescent lamp according to the second embodiment.

FIG. 11 is a diagram showing a relationship between the location of the conveyor furnace and the temperature in the above.

FIGS. 12A and 12B are explanatory views illustrating manufacturing steps of the above.

FIG. 13 shows a flat fluorescent lamp according to a third embodiment;
(A) is the figure which looked at the state which mounted the glass container on the frame member from the upper direction, (b) is sectional drawing which shows the state which combined the glass container and the front glass.

FIG. 14 is an explanatory diagram illustrating a manufacturing process of the above.

FIG. 15 is a perspective view showing a glass container used for a conventional flat fluorescent lamp.

FIG. 16 is an enlarged sectional view of a main part of the above.

FIG. 17 shows a flat fluorescent lamp according to the above, and (a)
(B) is an enlarged sectional view of a main part, and (c) is a view of the glass container as viewed from above.

FIG. 18 is a sectional view showing another conventional flat fluorescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass container 2 Front glass 3 Electrode part 5 Groove 6 Hole 9 Filament

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Wataru Noda 1048 Odomo Kadoma, Kadoma City, Osaka Inside Matsushita Electric Works, Ltd.

Claims (21)

[Claims] 1. A glass container in which a spiral groove serving as a discharge space is formed on the surface and a hole is formed at both ends of the groove, and a phosphor is attached to a key point, and a glass container. At the same time, the step of applying the phosphor, the step of firing the phosphor, and the step of heating the ambient temperature near the softening point in a state of being combined with the glass container and hermetically welding the glass container are performed continuously. Electrode part which is sealed with a frit in a hole of a glass container in which a front glass having an electrode for electron emission and having a fluorescent substance attached thereto is sealed in a glass container sealed with a glass container. And a flat fluorescent lamp. 2. A glass container having a flat plate-like shape, a spiral groove serving as a discharge space formed on a surface thereof, holes formed at both ends of the groove, and a fluorescent substance adhered to essential parts, and a fluorescent substance. In manufacturing a flat-type fluorescent lamp comprising a flat front glass covered with and sealed in a glass container, and an electrode portion having an electrode for electron emission and sealed in a hole of the glass container. A step of simultaneously applying a phosphor to the glass container and the front glass; a step of firing the phosphor applied to the glass container and the front glass; and heating the glass container and the front glass in a state where the glass container and the front glass are combined. Manufacturing a flat fluorescent lamp, characterized in that after continuously performing a step of hermetically welding with glass, the electrode portion is sealed with a frit in a hole of the glass container in a state where the front glass is welded. Method. 3. The method of manufacturing a flat fluorescent lamp according to claim 2, wherein the glass container and the front glass are welded after firing the phosphor applied to the glass container and the front glass. 4. The method for manufacturing a flat fluorescent lamp according to claim 2, wherein the ambient temperature is heated to a temperature higher than the softening point of the glass to weld the glass container and the front glass. 5. The method according to claim 2, wherein an outer peripheral portion of the glass container and an outer peripheral portion of the front glass are welded to each other. 6. The method of manufacturing a flat fluorescent lamp according to claim 2, wherein a constant pressure is applied to a portion where the glass container and the front glass are welded when the glass container and the front glass are welded. 7. The method according to claim 6, wherein the constant pressure is not less than 10 g / cm ^{2 and not} more than 50 g / cm ² . 8. The glass container and the front glass in a combined state are provided with a metal holding member, and a constant pressure is applied to a portion where the glass container and the front glass are welded. Of manufacturing a flat fluorescent lamp. 9. The method according to claim 2, wherein the glass container and the front glass are made of soft glass. 10. When applying a fluorescent substance to a glass container and a front glass, the glass container and the front glass are opposed to each other via a supporting member, and the glass is passed through a gap provided between the glass container and the front glass. The phosphor was simultaneously applied to the container and the front glass, the phosphor applied to the glass container and the front glass was dried, and then the phosphor applied to the glass container and the front glass was baked to combine the glass container and the front glass. 3. The method of manufacturing a flat fluorescent lamp according to claim 2, wherein the welding is performed by heating the ambient temperature to a temperature equal to or higher than the softening point of the glass in the state. 11. A support member provided with shielding means for shielding a portion to be welded to a glass container and a front glass is interposed between the glass container and the front glass, and a support member is provided between the glass container and the front glass. The method for manufacturing a flat fluorescent lamp according to claim 10, wherein a gap is provided in the fluorescent lamp. 12. The method according to claim 11, wherein said support member is made of metal. 13. The glass container and the front glass are fired in a state where a supporting member is interposed between the glass container and the front glass, and then the supporting member is removed to remove the phosphor. 11. The method for manufacturing a flat fluorescent lamp according to claim 10, wherein the glass container and the front glass are welded in a state where the glass container is brought into direct contact with the glass container. 14. A glass container having a flat plate-like shape, a spiral groove serving as a discharge space formed on the surface thereof, holes formed at both ends of the groove, and a fluorescent substance adhered to essential points, and a fluorescent substance. A flat front glass that is applied and sealed in a glass container,
In manufacturing a flat fluorescent lamp including an electrode for electron emission and an electrode portion sealed in a hole of a glass container, a glass container having a spiral groove formed on a surface is formed with a groove. Placed on a stainless steel pedestal with the release agent coated on its surface with the surface facing upward, and the portion of the glass container to be welded to the front glass is shielded by the first shielding means, and is welded to the glass container. The front glass whose part is to be shielded by the second shielding means is placed on a glass container via a support member for providing a gap between the front glass and the glass container, and the surface of the stainless steel is coated with a release agent. Is placed on the front glass, and a nozzle for applying the phosphor is inserted from a gap provided between the glass container and the front glass, and the nozzle simultaneously applies the phosphor to the glass container and the front glass. Spray coat After the phosphor applied to the glass container and the front glass is dried, the ambient temperature of the glass container and the front glass is heated to about 525 ° C., and the phosphor applied to the glass container and the front glass is simultaneously heated. After firing, the supporting member interposed between the glass container and the front glass is removed, and the glass container and the front glass are brought into direct contact with each other. After applying a pressure of ² cm ² and heating the ambient temperature to about 760 ° C. to weld the glass container and the front glass, the electrode portion was attached to the hole of the glass container to which the front glass was welded, and the glass container and the electrode portion were attached. Applying a frit to the joint of (1), heating the joint to about 450 ° C., and sealing the electrode in the hole. 15. A glass container having a flat plate-like shape, a spiral groove serving as a discharge space formed on the surface thereof, holes formed at both ends of the groove, and a fluorescent substance adhered to essential points, and a fluorescent substance. A flat front glass that is applied and sealed in a glass container,
In manufacturing a flat fluorescent lamp having an electrode for electron emission and an electrode portion sealed in a hole of a glass container, a front surface is placed on a stainless steel pedestal whose surface is coated with a release agent. A glass is placed, a part of the front glass to be welded to the glass container is shielded by the first shielding means, and a part to be welded to the front glass is shielded by the second shielding means. The surface on which the groove is formed faces downward, and is placed on the front glass via a support member for providing a gap between the front glass and a stainless steel holding member having a surface coated with a release agent. Placed on the container, insert a nozzle for applying the phosphor from the gap provided between the glass container and the front glass, spray coating the phosphor on the glass container and the front glass simultaneously with the nozzle, the glass container After drying the phosphor applied to the glass container and the front glass, the ambient temperature of the glass container and the front glass is heated to about 525 ° C., and the phosphor applied to the glass container and the front glass is simultaneously fired. The support member interposed between the container and the front glass is removed, the glass container and the front glass are brought into direct contact, and a pressure of about 35 g / cm ² is applied to the portion where the glass container and the front glass are welded by the pressing member. In addition, the ambient temperature is about 760 ° C
After the glass container and the front glass are welded, the electrode portion is attached to the hole of the glass container to which the front glass is welded, and a frit is applied to a joint portion between the glass container and the electrode portion, and the joint portion is formed. A method of manufacturing a flat fluorescent lamp, comprising heating to about 450 ° C. and sealing an electrode portion in a hole. 16. The glass container and the front glass are heated and welded in the same furnace after firing the phosphor applied to the glass container and the front glass, respectively. A method for manufacturing a flat fluorescent lamp. 17. A phosphor is applied to each of the glass container and the front glass with a supporting member interposed between the glass container and the front glass, and the phosphor applied to the glass container and the front glass is dried. After that, in a state where the support member is removed and the glass container and the front glass are in direct contact with each other, firing of the phosphor applied to the glass container and the front glass and welding of the glass container and the front glass are performed. The method for manufacturing a flat fluorescent lamp according to claim 10, wherein: 18. A glass container in which a spiral groove serving as a discharge space is formed on a surface of a flat plate and holes are formed at both ends of the groove, and a fluorescent substance is adhered to essential parts, and a fluorescent substance. A flat front glass that is applied and sealed in a glass container,
In manufacturing a flat fluorescent lamp including an electrode for electron emission and an electrode portion sealed in a hole of a glass container, a glass container having a spiral groove formed on a surface is formed with a groove. Placed on a stainless steel pedestal with the release agent coated on its surface with the surface facing upward, and the portion of the glass container to be welded to the front glass is shielded by the first shielding means, and is welded to the glass container. The front glass whose part is to be shielded by the second shielding means is placed on a glass container via a support member for providing a gap between the front glass and the glass container, and the surface of the stainless steel is coated with a release agent. Is placed on the front glass, and a nozzle for applying the phosphor is inserted from a gap provided between the glass container and the front glass, and the nozzle simultaneously applies the phosphor to the glass container and the front glass. Spray coat After the phosphor applied to the glass container and the front glass is dried, the supporting member interposed between the glass container and the front glass is removed, and the glass container and the front glass are brought into direct contact with each other to hold down. Approximately 35 parts are welded to the glass container and the front glass by the member.
After applying a pressure of g / cm ² , the surrounding temperature of the glass container and the front glass was heated to about 525 ° C. while flowing air near the portions of the glass container and the front glass to which the phosphors were applied, respectively. After simultaneously sintering the phosphor applied to the container and the front glass, stopping the flow of air near the portions of the glass container and the front glass to which the phosphor was applied, and heating the ambient temperature to about 760 ° C. The glass container and the front glass are welded, the electrode is attached to the hole of the glass container to which the front glass is welded, a frit is applied to the joint between the glass container and the electrode, and the joint is heated to about 450 ° C. And sealing the electrode portion to the hole. 19. A glass container having a flat plate-like shape, a spiral groove serving as a discharge space formed on the surface thereof, holes formed at both ends of the groove, and a fluorescent substance adhered to essential points, and a fluorescent substance. A flat front glass that is adhered and sealed to a glass container,
In manufacturing a flat fluorescent lamp having an electrode for electron emission and an electrode portion sealed in a hole of a glass container, a front surface is placed on a stainless steel pedestal whose surface is coated with a release agent. A glass is placed, a part of the front glass to be welded to the glass container is shielded by the first shielding means, and a part to be welded to the front glass is shielded by the second shielding means. The surface on which the groove is formed faces downward, and is placed on the front glass via a support member for providing a gap between the front glass and a stainless steel holding member having a surface coated with a release agent. Placed on the container, insert a nozzle for applying the phosphor from the gap provided between the glass container and the front glass, spray coating the phosphor on the glass container and the front glass simultaneously with the nozzle, the glass container And after drying the phosphor applied to the front glass, the supporting member interposed between the glass container and the front glass is removed, the glass container and the front glass are brought into direct contact, After applying a pressure of about 35 g / cm ² to the portion of the front glass to be welded, the ambient temperature of the glass container and the front glass is reduced while flowing air near the portions of the glass container and the front glass to which the phosphor has been applied, respectively. After heating to about 525 ° C. and simultaneously firing the phosphor applied to the glass container and the front glass, the flow of air is stopped in the vicinity of the portions of the glass container and the front glass to which the phosphor has been applied, respectively. The temperature was heated to about 760 ° C., the glass container and the front glass were welded, and the electrode portion was attached to the hole of the glass container to which the front glass was welded. A method of manufacturing a flat fluorescent lamp, comprising applying a frit to a joint between a vessel and an electrode, heating the joint to about 450 ° C., and sealing the electrode in a hole. 20. A phosphor is simultaneously applied to the glass container and the front glass in a state where the glass container and the front glass are in direct contact with each other, and the phosphor applied to the glass container and the front glass is dried. 3. The method according to claim 2, wherein the firing of the body and the welding of the glass container and the front glass are performed. 21. A glass container having a flat plate-like shape in which a spiral groove serving as a discharge space is formed on the surface thereof, holes are formed at both ends of the groove, and a fluorescent substance is adhered to important places, and a fluorescent substance. A flat front glass that is applied and sealed in a glass container,
In manufacturing a flat fluorescent lamp including an electrode for electron emission and an electrode portion sealed in a hole of a glass container, a groove is formed in a glass container having a spiral groove formed on a surface thereof. On a stainless steel pedestal with the release agent applied to the surface, the front glass placed on a glass container, and a stainless steel holder with the release agent applied to the surface. The member is placed on the front glass, and a pressure of about 35 g / cm ² is applied to the portion where the glass container and the front glass are welded by the pressing member, and the glass container and the front glass are separated from the holes formed in the glass container. After flowing the phosphor along with the nitrogen gas in the enclosed space and applying the phosphor,
The surrounding temperature of the glass container and the front glass is heated to about 525 ° C. while flowing air near the portions of the glass container and the front glass to which the phosphor has been applied, respectively, and the phosphor applied to the glass container and the front glass is cooled. After the simultaneous firing, the air was stopped from flowing near the portions of the glass container and the front glass to which the phosphor was applied, and the ambient temperature was set to about 760 ° C., and the heating was performed for about 10 minutes to fuse the glass container and the front glass. Attach the electrode to the hole in the glass container to which the front glass is welded, apply a frit to the joint between the glass container and the electrode, heat the joint to about 450 ° C, and seal the electrode to the hole. A method for manufacturing a flat fluorescent lamp, comprising: