JP2002134061A - Discharge lamps and lighting devices - Google Patents

Abstract

(57) Abstract: Disclosed is a discharge lamp provided with a properly fixed holder and a lighting device using the same. A discharge lamp body having at least one pair of electrodes disposed to generate a discharge and a discharge medium and a discharge medium, a discharge lamp body attached to at least one end of the discharge lamp body, and discharge. A holder 2 having a fixing material injection port 2c and a fixing material injection confirmation port 2d substantially diametrically separated from each other across the tube axis of the lamp body 1, and a fixing material fixing the holder 2 and the discharge lamp body 1. 3 is provided. When the nozzle 4b of the dispenser 4 is pressed against the fixing material injection port 2c and a required amount of the fixing material 3 is injected into the holder 2, the fixing material injection confirmation port 2d
Since the part of the fixing material 3 can be seen from above, the injection may be terminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp having a holder at least at one end, and a lighting device using the same.

[0002]

2. Description of the Related Art Among fluorescent lamps, a fluorescent lamp emits ultraviolet rays by discharge of mercury vapor or a rare gas, and the ultraviolet rays irradiate a phosphor layer to excite the phosphor in the phosphor layer to emit visible light. Release. Then, it is led out of the visible light transmissive airtight container discharged into the fluorescent lamp and used for lighting or the like.

As one form of utilization of a discharge lamp, a discharge lamp having a relatively small diameter and an elongated light-transmitting airtight container is frequently used for a backlight or a reading device of a liquid crystal display device. In order to dispose the discharge lamp in the device, by mounting a synthetic resin holder on both ends or one end of the discharge lamp body, the discharge lamp can be supported at a predetermined position in the device via the holder. . In addition, by providing the holder, the power supply portion to the electrode of the discharge lamp can be insulated and protected.

FIG. 20 is a vertical sectional view showing the essential parts of a first conventional discharge lamp.

FIG. 21 is a conceptual vertical sectional view showing a principal part of a fixing material injection method.

FIG. 22 is a conceptual vertical sectional view showing a principal part of a fixing material injection method different from FIG.

In each of the drawings, reference numeral 101 denotes a discharge lamp body,
102 is a holder, 103 is a fixing member, and 104 is a dispenser.

[0008] Although not shown, the discharge lamp body 101 has a phosphor layer formed on the inner surface of an elongated glass bulb and a discharge medium sealed therein, so that a pair of discharge lamps is generated inside the discharge lamp body. External electrodes are provided.

The holder 102 has a cap shape and is attached to both ends of the discharge lamp body 101. A fixing material injection port 102a is formed at the center of the bottom, that is, at a position concentric with the tube axis.

The fixing agent 103 is made of silicone resin or hot melt, and fixes the interior of the holder 102 between the holder 102 and the end face of the discharge lamp body 101.

The dispenser 104 is a means for injecting the fixing material 103. As shown in FIG. 21, the outer diameter of the tip of the nozzle 104a is the same as the opening diameter of the fixing material injection port 102a of the holder 102. Yes, nozzle 104
a of the fixing material 1 is pressed against the fixing agent injection port 102a.
03 is injected into the holder 102. Thereby, the fixing material 103 is injected into the holder 102 without protruding from the fixing material injection port 102a. Further, as shown in FIG. 22, it is also possible to make the nozzle 104a of the dispenser 104 thinner and inject the fixing material 103 in a state where the nozzle 104a is inserted into the holder 102.

FIG. 23 is a vertical sectional view showing the essential parts of a second conventional discharge lamp.

FIG. 24 is a vertical sectional view of a principal part showing a method for injecting a fixing material.

In each of the drawings, the same parts as those in FIGS. 20 to 22 are denoted by the same reference numerals, and description thereof will be omitted. That is, the second conventional discharge lamp further includes a holder 10.
A slit 102b reaching the back of the side surface portion 2 is formed.

[0015]

However, in the case of the first conventional discharge lamp, as shown in FIG. 21, if the fixing material injection port 102a and the nozzle 104a of the dispenser 104 have the same diameter, as shown in FIG. Since it is not known how much is injected, there is a problem that the injection of the fixing material 103 tends to be excessive or insufficient. Further, as shown in FIG. 22, when the nozzle 104a of the dispenser 104 is made thin, it takes a long time to inject the fixing material 103, and there is a problem that workability of fixing the holder is poor.

On the other hand, in the case of the second conventional discharge lamp shown in FIG.
Since the distance from the fixing material 02b is small, even if the required amount of the fixing material 103 is injected, it easily flows out of the slit 102b, and thus it is difficult to hold the required amount of the fixing material 103 in the holder 102. In addition, the injected fixing material 103 is
2 tends to be biased toward the slit 102b side from the center of the holder 2, i.e., from the tube axis, so that a sufficient fixing force cannot be obtained.
There is a problem that 02 is easily dropped.

An object of the present invention is to provide a discharge lamp provided with a holder fixed appropriately and a lighting device using the same.

[0018]

A discharge lamp according to the present invention is an elongated light-transmitting airtight container, a discharge medium sealed in the light-transmitting airtight container to generate radiation by electric discharge, and a light-transmitting airtight container. A discharge lamp body provided with at least one pair of electrodes arranged to generate a discharge; a cap-shaped discharge lamp body mounted on at least one end of the discharge lamp body and substantially sandwiching a tube axis of the discharge lamp body. A holder having a fixing material injection port and a fixing material injection confirmation window formed apart from each other in a diametrical direction; and a fixing material fixing between the discharge lamp body and the holder in the holder. It is characterized by.

In the present invention and the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.

<Regarding the Discharge Lamp Body> The discharge lamp body includes a light-transmitting airtight container, a discharge medium, and at least one pair of electrodes.

(About Translucent Airtight Container> A translucent airtight container is formed by sealing both ends of a glass bulb or sealing an opening formed at the base end of a glass bulb with a closed end. It is preferable because it is the easiest to manufacture and the cost is low, but if necessary, it may be made of translucent ceramics etc. The glass may be soft glass, semi-hard glass, hard glass, quartz glass, etc. The "light-transmitting" of the light-transmitting airtight container does not require that the entire light-transmitting airtight container be light-transmitting, and at least is accompanied by discharge. It is only necessary that the portion where visible light emitted from the phosphor layer is to be extracted to the outside is translucent to the light. It is more than twice as long

Further, the transparent airtight container may be either a straight tube or a curved tube. For example, U-shaped
Various shapes such as a U-shape, a double U-shape, an L-shape, a U-shape, an annular shape, and a semi-annular shape can be adopted.

Furthermore, in the present invention, the translucent airtight container may have a flat, square, triangular, or other cross section.

(Discharge Medium) The discharge medium is not limited to a specific material, as long as it is sealed in a light-transmitting airtight container and emits radiation by discharge. For example, a first mode including mercury vapor and a rare gas that emits ultraviolet rays having a wavelength of 300 nm or less at the time of discharge, a second mode mainly including a rare gas including at least xenon, and direct emission of visible light by discharge such as neon Any configuration such as the third embodiment described above may be used.

In the first mode, although the amount of light is relatively large, the dependence on the ambient temperature is strong, and the luminous flux rising characteristic is poor. On the other hand, in the second embodiment, there is no dependency on the ambient temperature, and the luminous flux rising characteristics are good. Noble gas is
At least xenon can be used, and neon, argon, krypton, helium, and the like can be used in any combination as desired. Of course, xenon can be used alone. In the case where the fluorescent lamp performs a dielectric barrier discharge using the external electrodes or the internal and external electrodes, a rare gas halide such as KrF or ArCl or a simple halogen may be added in addition to the rare gas. As the halogen, iodine, bromine, and chlorine can be used. If the element exists as a vapor in the range of several hundreds to about 1 MPa, discharge is possible. However, when the discharge lamp performs arc discharge using the internal electrodes, it is preferable to use only the rare gas. In the third embodiment, it is not necessary to perform wavelength conversion using the phosphor layer, but a color filter can be used in combination to selectively adjust the wavelength as needed.

(Electrode) As long as at least one pair of the electrodes is arranged so that a discharge is generated through the discharge medium inside the light-transmitting airtight container, the electrodes inside and outside the light-transmitting airtight container are provided. Any of them may be used.

When the discharge lamp is configured to perform mercury vapor discharge, at least one pair of electrodes can be separately sealed inside the translucent airtight container, that is, as an internal electrode.

On the other hand, in the case where the discharge lamp is configured to perform a dielectric barrier discharge, either the inner-outer electrode arrangement or the outer electrode arrangement can be adopted.

(Other Configurations of Discharge Lamp Body) 1. Phosphor Layer The phosphor layer is used when the discharge medium converts the wavelength of ultraviolet light emitted by discharge into visible light. And it is arrange | positioned at the inner surface side of a translucent airtight container. Further, the phosphor layer may be provided over the entire circumference on the inner surface side of the translucent airtight container, or may be provided so as to form an aperture extending in a slit shape along the longitudinal direction. . The “inner side of the translucent airtight container” is defined as a mode in which the phosphor layer is formed directly on the inner surface of the translucent airtight container, and the indirect fluorescent light is applied to the inner surface of the translucent airtight container via a protective film or the like. It is meant to include any of the embodiments for forming a body layer.

Next, a single phosphor or a mixture of plural phosphors can be used as the phosphor. It is possible to use a white-light-emitting three-wavelength light-emitting phosphor obtained by mixing red, green, and blue light-emitting phosphors. However, if necessary, in order to obtain a discharge lamp of each emission color of R (red), G (green) and B (blue) as the discharge lamp, a phosphor of each single color emission may be used. By using one or a plurality of discharge lamps of each single color emission, white light can be obtained by additive color mixing. Further, the phosphor layer may have a single layer configuration or a multilayer configuration.
In the latter case, the type of phosphor may be different for each layer. Further, a third layer made of another substance that is not a phosphor, for example, a conductive layer, a discharge state improving layer mainly composed of a metal oxide, or the like may be interposed between the phosphor layers.

2. About a protective film etc. If necessary, a protective film or an electron emitting material film made of alumina fine particles or the like can be formed on the inner surface of the translucent airtight container. When forming a protective film, a protective film may be formed between the phosphor layer and the inner surface of the translucent airtight container, or a protective film may be formed on the inner surface of the phosphor layer on the discharge space side. Is also good.
In addition, it is possible to form an electron emitting material film, and in this case, it is effective to avoid or reduce the occurrence of dark characteristics of the fluorescent lamp.

<About the Holder> The holder has a cap shape and is attached to at least one end of the discharge lamp body. The fixing material injection port and the fixing material injection confirmation port are formed so as to be substantially diametrically separated from each other with respect to the tube axis of the discharge lamp body. The phrase “cap-shaped” by the holder means that the holder can be mounted in a state of covering the end of the discharge lamp main body, and the specific structure and shape are not limited. A configuration is provided such that there is a cylindrical side surface portion that wraps around the end of the discharge lamp body from the outside, and a back surface portion that covers the end surface of the discharge lamp body. In addition, regarding the position of the fixing material injection port and the fixing material injection confirmation port,
Being diametrically spaced means that it may be slightly offset from the diametric direction.

The holder may be made of any material, but preferably, an insulating material such as a polycarbonate resin and a silicone resin can be used. However, if necessary, a metal or a material in which the inner surface or both inner and outer surfaces of the metal are covered with an insulating film may be used.

Further, the fixing material injection port and the fixing material injection confirming port may be any openings as long as the fixing material can be injected and the injection of the fixing material can be confirmed regardless of the design intention. Therefore, another function, for example, a function of deriving a lead wire may be additionally provided. Further, the fixing material injection port and the fixing material injection confirming port may be formed on either the side portion or the rear portion of the holder, or may be formed over both portions.

Further, the holder may be mounted on both ends of the discharge lamp body, or may be mounted only on one end. If the holders are mounted at both ends, the discharge lamp body can be supported at both ends. If the holder is attached to only one end, cantilever can be supported.

<Fixing Material> The fixing material is a means for fixing the holder to the end of the discharge lamp main body, and for example, a silicone resin, hot melt or the like can be used. Then, the holder can be securely fixed to the discharge lamp body by sufficiently injecting the fixing material from the fixing material injection port of the holder into the inside of the holder and until the injection can be confirmed from the fixing material injection check port.

The means for injecting the fixing material into the holder is not limited. For example, the fixing material can be injected using a dispenser. A dispenser is a means used when a material having a certain degree of viscosity is pressurized and discharged. The dispenser includes a cylinder (or a barrel) for pressing the material, a nozzle (or a needle) for discharging the material, and an operation unit for operating the cylinder. It is provided with. Then, the nozzle of the dispenser is pressed against the fixing material injection port of the holder to inject the inside of the holder.

<Function of the Present Invention> In the present invention, the fixing material injection port and the fixing material injection confirmation port of the holder are formed so as to be substantially diametrically separated from each other with respect to the tube axis of the discharge lamp. The injection of the fixing material is started from the material injection port, and after confirming that the fixing material has entered the fixing material injection confirmation port, the injection can be ended. As a result, the required amount of the fixing material is uniformly injected into the holder. Therefore, the fixing of the holder to the discharge lamp body is improved. Further, the work of injecting the fixing material can be performed in a short time, and the workability of fixing the holder is improved.

The discharge lamp according to the second aspect of the present invention is the first aspect of the present invention.
In the discharge lamp described above, the discharge lamp body is characterized in that at least one electrode constitutes an external electrode disposed on the outer surface of the light-transmitting hermetic container.

The present invention provides a discharge lamp in which at least one of at least one pair of electrodes of the discharge lamp body is constituted by an external electrode.

As a structure in which at least one of the pair of electrodes is an external electrode, any of the internal and external electrode arrangement and the external electrode arrangement can be employed as described above.
Hereinafter, the main aspects of the electrode arrangement will be described.

1. Internal / External Electrode Configuration The internal / external electrode configuration is an electrode configuration in which one or more internal electrodes and one or more external electrodes are paired. Also,
This arrangement is divided into a short internal electrode and a long internal electrode extending along the longitudinal direction of the translucent airtight container.

(1) Electrode arrangement using short internal electrodes In this electrode arrangement, short electrodes similar to those used in a normal internal electrode type fluorescent lamp are used.

(1-1) An electrode arrangement in which a single internal electrode is arranged at one end of the light-transmitting airtight container and a single external electrode is arranged on the outer surface of the light-transmitting airtight container. (1-2) Light transmission An electrode arrangement in which a pair of internal electrodes are arranged at both ends of the airtight container and a single external electrode is arranged on the outer surface of the translucent airtight container.In this electrode arrangement, both the pair of internal electrodes form one pole of the lighting circuit. And a configuration in which an external electrode is connected to the other pole of the lighting circuit, and a pair of lighting circuits are prepared and one pole of each lighting circuit is separately connected to the internal electrode, and the external electrode is connected to the other pole of the pair of lighting circuits. And the same potential.

(1-3) Electrode arrangement in which internal electrodes are arranged at both ends of the light-transmitting airtight container and a pair of external electrodes are arranged on the outer surface of the light-transmitting airtight container. In this electrode arrangement, the internal electrode and the external electrode are arranged. Are opposed to each other on a one-to-one basis.

(1-4) Internal electrodes are arranged at both ends and the middle of the translucent airtight container, respectively, and a single external electrode is commonly opposed. (1-5) Both ends and the middle of the translucent airtight container An electrode arrangement in which a plurality of external electrodes individually facing the internal electrodes are arranged on the outer surface of the translucent discharge vessel. (2) Electrode arrangement using a long internal electrode In this electrode arrangement, An internal electrode having a length extending over substantially the entire length of the light-transmitting airtight container is used. A structure in which both ends of the internal electrode penetrate both ends of the translucent airtight container in an airtight manner and are led out to the outside, and only one end of the internal electrode penetrates one end of the translucent airtight container in an airtight manner and However, there is a one-end supporting structure in which the other end is located inside the vicinity of the other end of the translucent airtight container.

2 External electrode type arrangement In this arrangement, a pair of external electrodes are arranged on the outer surface of the translucent airtight container so as to face each other. One or more pairs of external electrodes can be arranged.

By the way, in the case of an internal electrode sealed inside a light-transmitting airtight container, a flare seal, a bead seal,
Various known sealing means such as a pinch seal can be appropriately selected and used.

On the other hand, in the case of an external electrode provided outside the translucent airtight container, it is made of a conductive material such as a coil, a mesh structure, a transparent conductive film or a metal foil, and It can be configured to be disposed substantially in contact with the outer surface. It should be noted that the phrase “the external electrode is disposed substantially in contact with the outer surface of the light-transmitting airtight container” preferably means that the entire external electrode is in contact with the outer surface of the surface of the light-transmitting airtight container. However, this is not an essential requirement, and generally means that the external electrode only needs to be in contact with the outer surface of the light-transmitting airtight container. Further, the external electrode may have a size such that at least a part thereof extends to a position separated from the internal electrode in the longitudinal direction, that is, the axial direction of the light-transmitting airtight container. And in the outer peripheral direction of the translucent airtight container, it can be disposed within an angle range forming the entire periphery or a part of the outer periphery. Furthermore, when the external electrode is composed of a coil, a mesh structure, and a transparent conductive film, these structures transmit light through the external electrode and are guided to the outside. It can be arranged all around the hermetic container. On the other hand, when the external electrode is made of a metal foil, the metal foil is not substantially light-transmitting, so that the angle forming a part of the outer periphery of the light-transmitting airtight container so as not to cover the aperture. Be arranged within the range.

When the external electrode is constituted by a coil,
The pitch can be set as desired. Since the pitch of the coil of the external electrode affects the obtained brightness, the pitch of the coil can be appropriately adjusted to achieve a desired brightness distribution in the lamp axis direction. When the external electrode is formed of a mesh structure, a plain weave, twill weave, or knitted structure of a metal wire can be used. However, a punched metal plate may be used if necessary. In the case of using a knitted knitted structure, a thick cylinder is manufactured in advance, a light-transmitting airtight container is inserted therein, and then both ends of the knitted knitted structure are pulled to reduce the diameter of the knitted knitted structure. It can be in close contact with the outer peripheral surface of the light-tight container.

Further, when the external electrode is formed of a transparent conductive film, an ITO film, a NESA film, or the like can be used.

Further, when the external electrode is made of a metal foil, the metal foil is adhered to one surface of the transparent resin sheet, and the adhesive applied to the other surface of the transparent resin sheet is coated on the outer surface of the light-transmitting airtight container. An external electrode can be provided by adhering to the substrate. However, it is also possible to attach the metal foil directly to the outer surface of the translucent airtight container. Further, the width of the external electrode may change in the axial direction of the light-transmitting airtight container.

In the present invention, since one of the electrodes is an external electrode, a dielectric barrier discharge can be used. When the rare gas is mainly used,
It becomes easier to obtain the required light output.

According to a third aspect of the present invention, there is provided a lighting device comprising: a lighting device main body; a discharge lamp according to the first or second aspect disposed on the lighting device main body; and a lighting circuit for energizing the discharge lamp. It is characterized by having.

In the present invention, the term "illumination device" is a broad concept including all devices utilizing the light emission of a discharge lamp. For example, a backlight device, a liquid crystal display device having the same, and a liquid crystal display device incorporating the same are incorporated. Instrument panel lighting devices for mobile devices such as automobiles, decorative lighting fixtures, reading devices and image scanners, copiers and facsimile machines equipped with the reading devices. Examples of devices incorporating the liquid crystal display device include electronic devices such as personal computers, navigation devices, portable information terminals, and liquid crystal television receivers.

The "illumination device main body" refers to the remaining portion of the illumination device excluding the discharge lamp and the lighting circuit.

The lighting circuit is a means for starting and lighting the discharge lamp.

When the discharge lamp is configured to use arc discharge, the lighting circuit may be configured to apply a low-frequency or high-frequency AC voltage between the counter electrodes via a current-limiting impedance.

On the other hand, when the discharge lamp uses a dielectric barrier discharge, the lighting circuit outputs a high-frequency AC voltage having a waveform such as a rectangular wave or a sine wave, or a pulse voltage having a high repetition frequency. It is preferable to use a configuration in which the power is applied directly between the opposing electrodes without using an external current limiting impedance. Note that the pulse voltage can be obtained by half-wave rectification of a high-frequency AC voltage of a rectangular wave or a sine wave. Further, the lighting circuit can be constituted by an inverter.

[0060]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the discharge lamp of the present invention.

FIG. 2 is an enlarged side view of the same.

FIG. 3 is an enlarged longitudinal sectional view of a main part before a fixing material is injected.

FIG. 4 is an enlarged longitudinal sectional view of a main part showing a fixing material injection step.

FIG. 5 is a diagram showing the fixing material injection port and the tip of the nozzle of the dispenser in comparison.

In each figure, 1 is a discharge lamp body, 2 is a holder, 3 is a fixing member, and 4 is a dispenser.

The discharge lamp body 1 is made of a transparent airtight container 1.
a, a discharge medium and at least a pair of electrodes as essential elements. The translucent airtight container 1a is constituted by an elongated glass bulb with both ends sealed.
The discharge medium is mainly composed of xenon, and is sealed in the translucent airtight container 1a. The electrodes are not shown in the drawings, but are composed of a pair of external electrodes as described later.

The holder 2 is formed by molding a polycarbonate resin and has a cap-like shape having a side part 2a and a back part 2b. The back part 2b has a fixing material injection port 2c and a fixing material injection confirmation port 2d. Has formed. The fixing material injection port 2a and the fixing material injection confirmation port 2d are formed apart from each other in the diameter direction of the holder with the tube axis X of the discharge lamp body 1 interposed therebetween. In the present embodiment, the fixing material injection port 2a and the fixing material injection confirmation port 2d have the same opening diameter. In addition, as shown in FIG.
Is the nozzle 4 of the dispenser 4 whose opening diameter is described later.
It is the same as the outer diameter of the tip of b.

The fixing member 3 is made of a silicone resin adhesive, and fixes the holder 2 to the end of the discharge lamp body 1.

The dispenser 4 has a cylinder 4a and a nozzle 4b, and contains a fixing material made of a silicone resin adhesive in the cylinder 4a. Nozzle 4b
Is formed to have the same tip diameter as the opening diameter of the fixing material injection port 2a.

Then, the holder 2 is attached to the discharge lamp body 1.
First, as shown in FIG. 4, the holder 2 is fitted to the end of the discharge lamp body 1 such that the fixing material injection port 2a and the fixing material injection confirmation port 2b are in the vertical position.
Next, the nozzle 4 b of the dispenser 4 is connected to the fixing material injection port 4.
The fixing material 3 is poured into the holder 2 in accordance with a. Then, the fixing material 3 enters from above in the holder 2 while spreading mainly between the rear portion 2 b of the holder 2 and the end face of the discharge lamp body 1, and a part of the fixing material 3 enters the fixing material injection confirmation port 2.
It comes out to the position which can be seen from b. If so, fixing material 3
Should be stopped. The above steps may be performed by either manual assembly work or automatic assembly work. As a result, the required amount of the fixing material 3 is injected and appropriately spread in the holder 2, so that the holder 2 can be firmly fixed to the discharge lamp body 1.

FIG. 6 is a front view showing a discharge lamp main body according to the first embodiment of the discharge lamp of the present invention.

FIG. 7 is an enlarged transverse sectional view of the same.

FIG. 8 is a front view showing the tube lamp before the external electrodes are provided.

FIG. 9 is a plan view of the same.

FIG. 10 is a developed view showing the external electrodes before being disposed in the light-transmitting airtight container.

The discharge lamp body 1 of the present embodiment shown in each figure
Is a translucent airtight container 1a, a pair of external electrodes 1b, 1b,
Terminal plates 1c and 1c are provided with a phosphor layer 1d and an aperture 1e.

The translucent airtight container 1a is a glass tube 1 having a diameter of 10 mm and a straight tube shape, which is elongated and hermetically sealed at both ends.
a1 and has an exhaust tip off portion 1a2 at one end,
Xenon is sealed inside as a discharge medium.

Each of the pair of external electrodes 1b, 1b is made of a 50 μm thick aluminum thin film 1b2 formed by sticking to a 50 μm thick PET substrate 1b1, and is made transparent by an adhesive previously applied to the aluminum thin film surface. It is arranged by being attached to the outer surface of the light-tight airtight container 1a so as to be spaced apart and opposed to each other in parallel. In order to arrange the external electrodes 1b and 1b on the outer surface of the translucent airtight container 1a, as shown in FIG. 10, the external electrodes 1b and 1b are previously attached to the base 1b1 at predetermined intervals, and an adhesive is applied to the base 1b1 from above. Then, the base 1b1 may be wound around the outer periphery of the light-transmitting airtight container 1a.

The terminal plates 1c and 1c are formed by stamping a copper plate and applying tin plating. The terminal plates 1c and 1c are thin as a whole, but the electrode connection portion overlapping the external electrode 1b at the distal end has a tongue shape, and the external terminal at the proximal end. A lead wire connection portion projecting from the electrode 1b to the outside is formed widely. The terminal plate 1c is
Before arranging the external electrodes 1b and 1b on the outer surface of the light-transmitting hermetic container 1a, the electrode connection portion 1c1 is previously overlapped on the aluminum thin film 1b2, and the external electrodes 1b and 1b are connected by a conductive adhesive.
b. Then, the terminal plate 1c can be connected to the external electrode 1b at the same time that the external electrode 1b is provided on the outer surface of the translucent airtight container 1a.

As shown in FIG. 7, the phosphor layer 1d is made of a translucent airtight container 1a except for an aperture 1e described later.
It is arranged on the inner surface of.

The aperture 1e is formed in a slit shape at an appropriate opening angle in the translucent airtight container 1a along the longitudinal direction of the translucent airtight container 1a. The external electrodes 1b and 1b are provided at the aperture 1e of the translucent airtight container 1a.
And the translucent airtight container 1 without forming the phosphor layer 1d
a is transparent.

Next, another embodiment of the holder in the discharge lamp of the present invention will be described with reference to FIGS. In each drawing, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 11 is an enlarged side view of a second embodiment of the discharge lamp of the present invention.

In the present embodiment, the position of the fixing material injection port 2a is slightly closer to the tube axis and large, while the position of the fixing material injection confirmation port 2b is slightly distant from the tube axis and small. This is different from the first embodiment in the point. A point p in the figure indicates the center of the fixing material injection port 2c.

FIG. 12 is an enlarged vertical sectional view of a main part of a third embodiment of a discharge lamp according to the present invention before a fixing material is injected.

FIG. 13 is an enlarged vertical sectional view of a main part showing a fixing material injection step.

The present embodiment is different from the first embodiment in that the fixing material injection confirming port 2b has a slit shape and is formed in the side surface portion 2a of the holder 2.

FIG. 14 is an enlarged longitudinal sectional view of a main part of a fourth embodiment of the discharge lamp according to the present invention before a fixing material is injected.

In the present embodiment, the fixing material injection port 2a is formed at a position adjacent to the back portion 2b of the side portion 2a of the holder 2, and the fixing material injection confirmation port 2b is formed on the back portion 2b.
b is different from the first embodiment in that it is formed at a position adjacent to the side surface portion 2a.

FIG. 15 is an enlarged longitudinal sectional view of a main part of a discharge lamp according to a fifth embodiment of the present invention before a fixing material is injected.

In this embodiment, both the fixing material injection port 2a and the fixing material injection confirmation port 2b are
The first embodiment is different from the first embodiment in that it is formed at a position adjacent to the rear surface portion 2b of the first embodiment and at a position diametrically opposed to the tube axis.

However, in each of the second to fifth embodiments, essentially the same operation and effect as those of the first embodiment can be obtained.

Next, another embodiment of the discharge lamp body 1 will be described with reference to FIGS. In each figure, the same parts as those in FIGS. 6 to 10 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 16 is a front view showing a discharge lamp body according to a sixth embodiment of the discharge lamp of the present invention.

FIG. 17 is a front vertical sectional view of the same.

In each of the figures, 1f is a lead wire, 1g is an internal electrode, 1h is a relay wire, 1i is a translucent adhesive, and 1j is a translucent insulating coating.

The introduction line 1f penetrates one end of the translucent airtight container 1a in an airtight manner, and the airtight penetrating portion is made of Kovar, a sealing metal. And it is comprised by welding a nickel wire to the outer end part of Kovar.

The internal electrode 1g is made of a cold cathode, and is supported by welding at the end of the lead-in wire 1f, and the light-transmitting airtight container 1a
Is sealed inside one end.

The relay wire 1h is sealed at the other end of the translucent airtight container 1a so as not to be exposed to a discharge space formed in the translucent airtight container 1a. The part is formed by a nickel wire.

The external electrode 1b is formed by winding a conductive metal wire such as nickel, for example, in a coil shape.
The inner surface thereof is disposed in contact with the outer peripheral surface of the discharge vessel 1. The connecting portion 1b3 is formed by extending one end. The connection part 1b3 is connected to the relay wire 1h by welding. Both ends of the external electrode 1b are temporarily fixed to the surface of the translucent airtight container 1a by a transparent adhesive 1i.

The external electrode 1b is located in a region where one end is opposed to the internal electrode 1g at one end of the translucent discharge vessel 1.
The other end is located in a region facing the vicinity of the end of the discharge space on the other end side of the translucent airtight container 1a. And the external electrode 1
Between the two ends of b, the pitch of the coil is gradually reduced from one end to the other end.

The light-transmitting insulating coating 1j is formed by heating a transparent heat-shrinkable fluororesin sheet into a tube shape, and covering the light-transmitting airtight container 1a from the outside of the external electrode 1b to form a discharge lamp. The main body 1 is configured.

FIG. 18 is a longitudinal sectional view showing a discharge lamp body according to a seventh embodiment of the discharge lamp of the present invention.

This embodiment is different from the first embodiment in that the discharge lamp body 1 has an internal electrode arrangement. That is,
Each of the pair of electrodes is composed of the internal electrode 1g.

FIG. 19 is a conceptual cross-sectional view showing an image reading device as one embodiment of the illumination device of the present invention.

In the figure, 21 is an image reading optical system unit, 22 is a lighting circuit, 23 is a signal processing device, 24 is a document placing surface, and 25 is a case.

The image reading optical system unit 21 comprises a discharge lamp 21a and light receiving means 21b. Discharge lamp 2
1a is the structure shown in FIG. Then, the light emitted from the aperture is applied to a document (not shown) via the document placing surface 24. The light receiving means 21b is arranged to receive light reflected from the document surface.

The lighting circuit 22 lights the fluorescent lamp 21 by applying a pulse voltage having a high repetition frequency between a pair of external electrodes of the fluorescent lamp 21.

The signal processor 23 processes the output signal of the light receiving means 21b to form an image signal.

[0111] The case 25 houses each of the above components.

The image reading optical system unit 21
And the original placing surface 24 is relatively scanned. That is,
In the process of moving one or both of them in the opposite direction driven by a drive mechanism (not shown),
b sequentially receives light reflected from the original surface in a direction perpendicular to the moving direction. The image reading apparatus according to the present embodiment is applicable to OA equipment such as a copying machine, an image scanner, and a facsimile.

[0113]

According to the first and second aspects of the present invention, a discharge lamp body including a translucent airtight container, a discharge medium, and at least a pair of electrodes arranged to generate a discharge, and a discharge lamp A holder which is attached to at least one end of the main body and has a fixing material injection port and a fixing material injection confirmation port which are substantially diametrically separated from each other across the tube axis of the discharge lamp main body, and is fixed between the holder and the discharge lamp main body. With the fixing material, the required amount of fixing material can be injected evenly into the holder, and the holder can be fixed well to the discharge lamp body, and the fixing material can be injected in a short time. Thus, it is possible to provide a discharge lamp in which the workability of fixing the holder is improved.

According to the second aspect of the present invention, since at least one of the pair of electrodes is an external electrode, a dielectric barrier discharge can be used. Therefore, a discharge medium mainly containing a rare gas instead of mercury can be used. When used, it is possible to provide a discharge lamp that easily obtains a required light output.

According to the third aspect of the present invention, the lighting device main body,
The provision of the discharge lamp and the lighting circuit according to claim 1 or 2 makes it possible to provide a lighting device having the effects of claims 1 and 2.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a discharge lamp of the present invention.

FIG. 2 is an enlarged side view of the same.

FIG. 3 is an enlarged vertical cross-sectional view of a main part before a fixing material is injected.

FIG. 4 is an enlarged vertical sectional view of a main part showing a fixing material injection step in the same manner.

FIG. 5 is a diagram showing the fixing material injection port and the tip of the nozzle of the dispenser in comparison.

FIG. 6 is a front view showing a discharge lamp body according to the first embodiment of the discharge lamp of the present invention.

FIG. 7 is an enlarged cross-sectional view of the same.

FIG. 8 is a front view showing the tube lamp before the external electrodes are provided.

FIG. 9 is a plan view of the same.

FIG. 10 is an exploded view showing the external electrodes before being disposed in the translucent airtight container.

FIG. 11 is an enlarged side view of a second embodiment of the discharge lamp of the present invention.

FIG. 12 is an enlarged longitudinal sectional view of a main part of a discharge lamp according to a third embodiment of the present invention before a fixing material is injected.

FIG. 13 is an enlarged vertical cross-sectional view of a main part, similarly showing a step of injecting a fixing material.

FIG. 14 is an enlarged longitudinal sectional view of a main part of a discharge lamp according to a fourth embodiment of the present invention before a fixing material is injected.

FIG. 15 is an enlarged longitudinal sectional view of a main part of a discharge lamp according to a fifth embodiment of the present invention before a fixing material is injected.

FIG. 16 is a front view showing a discharge lamp body according to a sixth embodiment of the discharge lamp of the present invention.

FIG. 17 is a front sectional view of the same.

FIG. 18 is a longitudinal sectional view showing a discharge lamp body according to a seventh embodiment of the discharge lamp of the present invention.

FIG. 19 is a conceptual cross-sectional view showing an image reading device as one embodiment of the illumination device of the present invention.

FIG. 20 is a conceptual longitudinal sectional view of a principal part showing a first conventional discharge lamp.

FIG. 21 is a vertical sectional view showing a principal part of the same fixing material injection method.

FIG. 22 is a conceptual vertical sectional view of a principal part showing a fixing material injection method different from FIG. 21;

FIG. 23 is a vertical sectional view showing a principal part of a second conventional discharge lamp.

FIG. 24 is a vertical sectional view showing a principal part of the same fixing material injection method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Discharge lamp main body 1a ... Translucent airtight container 2 ... Holder 2a ... Side part 2b ... Back part 2c ... Fixing material injection port 2d ... Fixing material injection confirmation opening 3 ... Fixing material 4 ... Dispenser 4a ... Cylinder 4b ... Nozzle

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Maruyama 5-2-1 Asahi-cho, Imabari-shi, Ehime Prefecture Within Harrison Toshiba Lighting Co., Ltd. (72) Inventor Naoki Tsutsui 5-2-2 Asahi-cho, Imabari-shi, Ehime Prefecture 1F Harris Toshiba Lighting Co., Ltd. F-term (reference) 5C043 AA17 CC09 DD15 EA09

Claims (3)

[Claims] 1. An elongated light-transmitting airtight container, a discharge medium sealed in the light-transmitting airtight container and emitting radiation by discharge, and at least one pair of a discharge medium arranged to generate a discharge in the light-transmitting airtight container. A discharge lamp body having electrodes; a fixing agent inlet formed in a cap shape and attached to at least one end of the discharge lamp body, and formed substantially diametrically across the tube axis of the discharge lamp body; and A discharge lamp, comprising: a holder having a fixing material injection confirmation window formed therein; and a fixing member for fixing the space between the discharge lamp body and the holder in the holder. 2. The discharge lamp according to claim 1, wherein at least one electrode of the discharge lamp body constitutes an external electrode disposed on an outer surface of the light-transmitting airtight container. 3. A lighting device comprising: a lighting device main body; a discharge lamp according to claim 1 provided in the lighting device main body; and a lighting circuit for energizing the discharge lamp. apparatus.