JP2003109405A - Projecting light source, projecting light source lighting device, projecting light device, and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projecting light source, a projecting light source lighting device, a projecting light device, and a projector, having a small size and preventing the obstruction of distribution of light by a mark of a lamp. SOLUTION: This projecting light source is composed of a bulb 6 made of quartz glass; a pair of electrode shafts 7, 8; a pair of electrodes 9, 10; and a discharge medium 11. The bulb 6 has an intermediate part 13 having a discharge space 12 and a pair of sealing parts 14, 15 unitedly formed at the both ends of the intermediate part 13. A mark 16a is indicated in the sealing part embedded in the neck part of reflector 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light projecting light source, a light projecting light source lighting device, a light projecting device, and a projector which are equipped with a high-pressure discharge lamp having a sealing member fixed to a reflector.

[0002]

2. Description of the Related Art High-pressure discharge lamps, especially short-arc high-pressure discharge lamps, are close to point light sources and have relatively easy light distribution control. Therefore, in addition to floodlighting, the photochemical industry, semiconductor manufacturing,
It is used in many fields such as video fields. For example,
It is widely used as a light source for a liquid crystal projector, which has become extremely popular in recent years. The light source for this LCD projector is
For example, it is disclosed in Japanese Patent Laid-Open No. 8-273401 (Prior Art 1) or Japanese Patent Laid-Open No. 8-264110 (Prior Art 2), and the structure of this light source is shown in FIGS. 5 and 6, respectively.

A light source 50 shown in FIG. 5 has a direct current lighting type metal halide lamp 51, and a pair of electrodes 52, 53 is connected to metal foils 56, 57 sealed in sealing portions 54, 55. . Then, the metal foil 56 on one side is a base 58 attached to an end portion via an external lead wire (not shown).
, And the other metal foil 57 is electrically connected to the external lead wire 59. The base 58 is fixed inside the neck portion 61 of the reflector 60 with an adhesive 62.

Further, the light source 63 shown in FIG. 6 has a metal halide lamp 64 for AC lighting, and the sealing parts 65, 65.
In, the lead wires 68 and 69 are electrically connected to the metal foils 67 and 67 electrically connected to the pair of electrodes 66 and 66. Part of the lead wires 68, 69 is filled in the neck portion 71 of the reflector 70 with the inorganic adhesive material 72, and the tip portions 68a, 69a thereof project into the socket fitting chamber 73. And the tips 68a, 69a
Is inserted into the socket 74 in the socket fitting chamber 73.

[0005]

In recent years, there has been a demand for miniaturization of an irradiation unit in which a light source is mounted, a high-pressure discharge lamp has been miniaturized and has high output, and a reflector has also been miniaturized. However, in the conventional technique 1, the base 58 is attached to the end of the sealing portion 54, and the base 58 is covered with the base 60.
Since the adhesive member 62 is used to fix the inside of the neck portion 61, the reflector 6 can be made smaller when the reflector 60 is downsized.
There is a drawback that the neck portion 61 occupying 0 becomes large and the reflecting surface 60a for reflecting the emitted light from the metal halide lamp 51 becomes small, so that sufficient reflected light cannot be obtained.

In addition, since this type of lamp is small, it is difficult to set the electrode at the center during manufacturing. That is, since the lamp is small, there is a slight variation in the electrode position.
It greatly affects the light distribution. Therefore, in order to allow the variation, for example, when trying to incorporate the lamp in the reflector with the electrode facing upward, if a mark indicating the direction of the lamp is added, there is a problem that the mark interferes with the actual light. .

The present invention has been made in view of the above problems, and provides a light emitting source, a light emitting light source lighting device, a light emitting device and a projector which are miniaturized so that the lamp mark does not interfere with the light distribution. The purpose is to provide.

[0008]

According to the invention of a light projecting light source described in claim 1, an intermediate portion having a discharge space and both ends of the intermediate portion are integrally formed, and a cross section in a direction perpendicular to a tube axis is substantially circular. Bulb made of quartz glass having a pair of sealing parts, a pair of electrode shafts in which a base end portion is implanted in the sealing part, and tips are spaced apart from each other in a discharge space, and tip ends of the electrode shafts. A high-pressure discharge lamp having a pair of electrodes disposed on the front surface, a mark displayed on one sealing portion, and a discharge medium sealed in the discharge space; A reflector main body having a reflecting surface for reflecting the light emitted from the high-pressure discharge lamp and projecting the light from the light projecting opening, and integrally formed on a bottom portion of the reflector body facing the light projecting opening so as to project outward. So that the seal is embedded in the seal on one side with an adhesive. It is provided with; a tubular neck that contact fixing the reflector comprising a.

The electrode provided on the electrode shaft is not limited to a specific electrode, and may be either an anode or a cathode. Therefore, it may be a high-pressure discharge lamp provided with an electrode having no distinction between an anode and a cathode, such as an electrode for AC lighting. Further, the electrode may be the tip portion of the electrode shaft itself, or may be formed by appropriately processing the tip portion of the electrode shaft.

"The base end portion of the electrode shaft is implanted in the sealing portion" means that the base end portion may be connected to the metal foil sealed in the sealing portion, and the base end portion is sealed. This means that it may penetrate through the stopper and be sealed to the sealing portion. Through holes are formed in the bottom portion and the neck portion of the reflector body so as to penetrate the sealing portion. The sealing portion penetrates the bottom portion and is at least partially fixed inside the neck portion with an adhesive. The tubular neck is
In some cases, an auxiliary body having a through-hole communicating with the through-hole of the neck is attached to the outer periphery of a neck with a small protruding length formed integrally with the reflector main body so as to project outward at the bottom of the reflector. Included. This auxiliary body may have any shape on the side surface side, such as a window portion or a collar that communicates with the internal through hole on the side surface.

The phrase "the neck portion directly fixes the sealing portion with an adhesive material" means that there is no inclusion other than the adhesive material between the neck portion and the outer surface of the sealing portion. Means that the neck and the seal are fixed to each other.

The "mark" may indicate the product model number in addition to the lamp electrode direction.

The "tube axis" means an imaginary line connecting the center points of the cross sections of the pair of sealing portions in the direction perpendicular to the longitudinal direction.

According to a second aspect of the present invention, there is provided the light source according to the first aspect, wherein one sealing portion fixed to the neck portion has an undulation on the outer surface. Characterize. The "undulation" may be a mark,
It may be different from the mark, that is, the high portion and the low portion formed on the outer surface of the sealing portion, which are formed so as to obstruct the movement or rotation of the sealing portion. I wish I had it. For example, it is unevenness formed on the outer surface of the sealing portion. When undulations are formed on the outer surface of the sealing part, an adhesive is filled between the undulations, and against the force that moves the sealing part in the pipe axis direction or the force that rotates it in the circumferential direction. The adhesive between the undulations becomes an obstacle and prevents the sealing part from moving or rotating. As a result, the sealing part
It will be firmly fixed to the neck of the reflector. According to the present invention, since the sealing portion having the undulations formed on the outer surface is fixed to the neck portion with the adhesive, the movement or rotation of the sealing portion is prevented, and the high pressure discharge lamp is firmly fixed to the reflector. It

The invention of a projection light source lighting device according to claim 3 is the projection light source according to claim 1 or 2; lighting means for stably forming a discharge between the electrodes of the high-pressure discharge lamp of the projection light source. And; are provided. According to the present invention, the cross section in the direction perpendicular to the tube axis is formed in a substantially circular shape, and the sealing portion having the undulations formed on the outer surface is fixed to the neck portion with an adhesive, so that the high-pressure discharge lamp is a reflector. A light emitting light source lighting device is formed which is firmly fixed to the light source and is capable of downsizing the reflector.

An invention of a light projecting device according to a fourth aspect comprises the light projecting light source lighting device according to the third aspect; and a housing for housing at least a light projecting light source of the light projecting light source lighting device. It is characterized by "The housing houses at least the light emitting source of the light emitting source lighting device" means that the light emitting device is
This means that the lighting means may be separately arranged. According to the present invention, the light projecting light source lighting device can miniaturize the reflector of the light projecting light source, so that the light projecting device that is miniaturized is provided.

According to a fifth aspect of the present invention, there is provided the high-pressure discharge lamp according to the fourth aspect, wherein the high-pressure discharge lamp is electrically connected to a base end side of each electrode shaft. An external lead wire is provided, and the housing is connected to the external lead wire that is connected to the base end side of the electrode shaft that is implanted inside one sealing portion that is fixed to the neck of the reflector. The first relay terminal is provided, and is connected to the outer surface side of the reflector to the external lead wire connected to the base end side of the electrode shaft implanted inside the other sealing portion. A second relay terminal is provided. The external lead wire is electrically connected to the base end portion in the sealing portion when the base end portion of the electrode shaft is sealed in the sealing portion, and the base end portion of the electrode shaft projects outside the sealing portion. When it is present, it is electrically connected to the base end portion outside the sealing portion. When the metal foil connected to the base end of the electrode shaft is sealed in the sealing portion, the external lead wire is connected to the metal foil. According to the present invention, the external lead wires that are electrically connected to the pair of electrode shafts are connected to the first relay terminal and the second relay terminal, respectively. Vibrations and vibrations of the external lead wire are reduced when the user is present. As a result, the stress on the sealing part that is fixed to the neck of the reflector is reduced, so that the high-pressure discharge lamp remains firmly fixed to the reflector, and the optical axis due to misalignment of the high-pressure discharge lamp or the like. Deviation is prevented.

The invention of the projector according to claim 6 is
The light-projecting light source lighting device according to claim 3, an image forming unit that forms an image by projecting light from a reflector of the light-projecting light source, and a housing that houses the light-projecting light source lighting device and the image forming unit. It is characterized by having. According to the present invention, the cross section in the direction perpendicular to the tube axis is formed into a substantially circular shape,
Since the sealing portion having the undulations on the outer surface is fixed to the neck of the reflector with an adhesive, the high-pressure discharge lamp is firmly fixed to the reflector, and the projector can be downsized. It

[0019]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. FIG. 1 is a partially cutaway cross-sectional view of a lighting device for lighting a light source showing a first embodiment of the present invention. The projection light source lighting device 1 includes a projection light source 2 and a lighting device 3 as a lighting means. And
The light projecting light source 2 includes a high pressure discharge lamp 4 and a reflector 5. The high pressure discharge lamp 4 has, for example, 10
This is a 0 W type ultra-high pressure mercury lamp for AC lighting, which is configured to have a bulb 6 made of quartz glass, a pair of electrode shafts 7, 8, a pair of electrodes 9, 10 and a discharge medium 11. The bulb 6 is provided with an intermediate portion 13 having the discharge space 12 and a pair of sealing portions 14 and 15 integrally formed at both ends of the intermediate portion 13. The intermediate portion 13 has a maximum diameter of 9 mm and a wall thickness of 2.5 mm, and has a substantially elliptic spherical shape. The maximum diameter is 6 mm
Is. The outer surface of the one sealing portion 14 has the structure shown in FIG.
As shown in, the undulations 16 are formed over a predetermined length of the tube axis. The undulations 16 can be formed by, for example, blasting the outer surface of the sealing portion 14. Here, the tube axis is the same as an imaginary line connecting the center points of the cross sections of the pair of sealing portions 14 and 15 in the direction perpendicular to the longitudinal direction.

The pair of electrode shafts 7 and 8 are tungsten rods having a diameter of 0.4 mm, and the base end portions are inserted into the sealing portions 14 and 15, respectively, and the tip ends are approximately 1.5 mm into the discharge space 12. It is located apart. Initially, the sealing portion 14,
Reference numeral 15 is formed in a circular shape, and a through hole is formed inside, and the base end portions of the electrode shafts 7 and 8 are inserted into the through hole. Then, the sealing portions 14 and 15 are provided in the discharge space 12
The inside of the sealing portions 14 and 15 is heated by a heating means such as a burner while slowly rotating in a state where a predetermined amount of the discharge medium 11 is enclosed in a vacuum or the discharge space 12. As a result, the insides of the sealing portions 14 and 15 are gradually melted and hermetically sealed, and the base end portions of the electrode shafts 7 and 8 are planted in the sealing portions 14 and 15. Further, the sealing portions 14 and 15 are formed into a substantially circular shape by heating and melting the sealing portions 14 and 15. That is,
The cross sections of the sealing portions 14 and 15 in the direction perpendicular to the tube axis are not formed into a true circular shape, but are formed into a non-perfect circular shape. Then, the mark 16a and the undulations 16 are formed on the outer surface of the one sealing portion 14 by ballasting or the like, as shown in FIG. The marks in this case indicate the direction in which the electrodes are facing up. Further, the undulations 16 appear as innumerable irregularities on the outer surface of the sealing portion 14. And the electrode shafts 14, 1
A pair of electrodes 9 and 10 are arranged at the tip of 5. That is, the diameter of each of the electrode shafts 14 and 15 is 0.2
mm tungsten wire is wound several times to form a pair of electrodes 9,
Forming 10. The discharge space 12 of the sealed bulb 6 is filled with a discharge medium 11 such as about 300 mg of mercury and about 33 KPa of argon (Ar) gas per ml.

The reflector 5 is made of borosilicate glass,
Reflector body 17 and reflector body 1 formed in an elliptical mirror
7 has a tubular neck portion 18 integrally formed therewith. The reflector main body 17 has a light projecting opening 1 on the front surface.
7a, a reflection surface 17b on the inner surface, and a through hole 17c capable of penetrating one sealing portion 14 on the bottom portion facing the light projecting opening 17a.
have. The diameter of the light projecting opening 17a is, for example, 78 mm. Also, the reflecting surface 17b
Is formed on a dichroic mirror in which a photoselective film is vapor-deposited on the surface of borosilicate glass, and reflects the light emitted from the high-pressure discharge lamp 4 to project it from the light projecting opening 17a. Further, the through hole 17c is formed in a hole having a maximum diameter of the sealing portion 14, for example, larger than 6 mm, for example, 9.5 mm. The neck portion 18 is formed by the reflector body 1
7 is integrally formed on the bottom of the reflector body 17 so as to project outward from the inner surface of the reflector body 17, and has a total length of 15 m, for example.
m, the outer diameter is 14 mm, and the inner diameter is 10 mm. The inside of the neck portion 18 and the through hole 17c of the reflector main body 17 communicate with each other, and the center of the cross section of the neck portion 18 in the direction perpendicular to the longitudinal direction, that is, the central axis is the through hole 17c and the light projecting opening 17a. It is located on the line connecting the centers of each.

The one sealing portion 14 of the high-pressure discharge lamp 4 is inserted through the through hole 17c along the central axis of the neck portion 18, and a part of the sealing portion 14 projects outside the neck portion 18. Then, in this state, the sealing portion 1 in the neck portion 18
Adhesive 1 such as insulating cement such as alumina around 4
Filled with 9. That is, in the neck portion 18, the one sealing portion 14 is directly fixed along the central axis by the adhesive material 19, whereby the high pressure discharge lamp 4 is fixed to the reflector 5.
And a light projecting light source 2 are formed. And
The center axis of the neck portion 18, the tube axis of the high pressure discharge lamp 4 and the center of the light projecting opening 17a are located on the same line.

As shown in FIG. 2, the sealing portion 14 fixed to the neck portion 18 has undulations 16 formed on its outer surface, and an adhesive 19 is interposed between the undulations 16. That is, the undulations 16 are connected to a myriad of irregularities formed on the outer surface of the sealing portion 14, and the adhesive 19 is also present in the concave portions of the irregularities. The high-pressure discharge lamp 4 only needs to have the mark 16a and the undulations 16 formed on the one sealing portion 14 fixed to the neck portion 18, and the marks 16a and the undulation 16 on the other sealing portion 15. Also need not be formed. The high-pressure discharge lamp 4 is provided with external lead wires 21 and 22 electrically connected to the base ends of the pair of electrode shafts 7 and 8, respectively.
Is connected to the output side of the lighting device 3. The external lead wire 22 electrically connected to the electrode shaft 8 is, for example, a nickel (Ni) wire, and is inserted through an insertion hole 24 provided in the reflector main body 17 to provide another external lead wire 23.
It is connected to the output side of the lighting device 3 via. Next, the operation of the first embodiment will be described.

The high pressure discharge lamp 4 has an adhesive 1 on the neck portion 18.
Since one sealing portion 14 fixed by 9 is formed so that the cross section in the direction perpendicular to the tube axis has a substantially circular shape, the maximum diameter of the sealing portion 14 is 6 m at the bottom of the reflector main body 17.
A through hole 17c having a diameter of 9.5 mm, which is slightly larger than m, can be provided, and the sealing portion 14 can be inserted into the inside of the neck portion 18 through the through hole 17c. Therefore, the projection aperture 17a of the reflector 5 has an opening diameter of, for example, 78 mm, and even if the reflector 5 is downsized, the area of the through hole 17c on the inner surface of the reflector 5 is small, and the inner surface of the reflector 5 is small. Are generally formed on the reflecting surface 17b. As a result, most of the light emitted from the high pressure discharge lamp 4 is reflected by the reflecting surface 17b and is projected from the light projecting opening 17a. That is, the sealing portion 14 formed in a substantially circular shape is attached to the inside of the neck portion 18 of the reflector 5 with the adhesive 1
Since the through hole 17c can be made smaller by directly fixing the light source 9 to 9, the size of the reflector main body 17 can be reduced and the size of the light projecting light source 2 can be reduced. Further, as shown in FIG. 2, a mark 16a is formed on the outer surface of the sealing portion 14.
Since it is formed, it serves as a mark when it is incorporated in the reflection plate, and since it is embedded by an adhesive, it does not become an optical obstacle. Further, since the undulations 16 are formed, when the sealing portion 14 is fixed with the adhesive material 19 in the neck portion 18, the adhesive material 19 is filled between the undulations 16. As a result, when a force that moves the sealing portion 14 in the tube axis direction or rotates in the circumferential direction acts, the adhesive material 19 between the undulations 16 becomes an obstacle, and the movement or rotation of the high pressure discharge lamp 4 is blocked. Become. Furthermore, since the sealing portion 14 has a substantially circular shape, a long diameter portion and a short diameter portion slightly smaller than the long diameter portion are formed in a cross section of the sealing portion 14 in a direction perpendicular to the tube axis. The adhesive 19 will be interposed between the outer surfaces of the diameter portion. As a result, when the force that rotates the sealing portion 14 in the circumferential direction of the tube axis acts,
The rotation of the long-diameter portion is blocked by the adhesive 19 interposed between the outer surfaces of the long-diameter portion and the short-diameter portion. That is, the sealing portion 14 is firmly fixed in the circumferential direction of the tube axis. Thus, the sealing portion 14 is formed in a substantially circular shape,
By forming the undulations 16 on the outer surface, the high pressure discharge lamp 4 is firmly fixed to the neck portion 18 of the reflector 5.

In the high-pressure discharge lamp 4, a rectangular wave AC voltage is applied between the pair of electrodes 9 and 10 from the lighting device 3, a discharge is formed between the electrodes 9 and 10 and the lamp is lit to emit visible light. . That is, in the high pressure discharge lamp 4, a discharge is stably formed between the electrodes 9 and 10 by the lighting device 3.
Further, by miniaturizing the reflector 5 of the light projecting light source 2, the light projecting light source lighting device 1 can also be miniaturized. In the first embodiment, the high pressure discharge lamp 4 has the base end portions of the electrode shafts 7 and 8 projected to the outside from the sealing portions 14 and 15. The external lead wire 2 is connected to the metal foil to be sealed in the sealing parts 14 and 15
It may be configured to connect 1, 2 or an outer conductor. Further, the sealing portion 14 does not need to have the undulations 16 formed on the outer surface thereof, and even if the sealing portion 14 is formed in a substantially circular shape, the high pressure discharge lamp 4 can be provided in the neck portion 1 of the reflector 5.
8 can be firmly fixed. That is, the sealing unit 1
By forming the undulations 16 on the outer surface of the reflector 4, the high-pressure discharge lamp 4 can be more firmly fixed to the neck portion 18 of the reflector 5.

Next, a second embodiment of the present invention will be described. FIG. 3 is a floodlighting device showing a second embodiment of the present invention, (a) is a front view, and (b) is a partially cut-away side view. The same parts as those in FIGS. 1 and 2 or parts corresponding to the same parts are designated by the same reference numerals, and the description thereof will be omitted. The floodlighting device 25 shown in FIG. 3 has, for example, a ceiling surface 26a.
It is a spotlight that is attached to and illuminates the floor surface or the object to be illuminated. The floodlighting device 25 includes a flange 2 in which a housing 27 that houses the floodlighting light source 2 is disposed on a ceiling surface 26a.
8 is attached via an arm 29, and is fixed by adjusting screws 30, 30 in a desired irradiation direction. Then, the opening side of the housing 27, that is, the light projecting opening 17 a of the light projecting light source 2.
On the side, a decorative frame 32 having a translucent tempered glass 31 is attached by a latch 33 or the like. Tempered glass 31
Is fixed to the decorative frame 32 using mounting screws 34. Then, as shown in FIG. 3B, the housing 27 is provided with the first relay terminal 35 attached to the inner surface by screws or the like (not shown), and the reflector 5 (reflector body 17). A second relay terminal 36 attached by a screw or the like (not shown) is provided on the outer surface side of the.
Then, the first relay terminal 35 and the second relay terminal 36
An external lead wire 22 is connected to the high pressure discharge lamp 4 via an external lead wire 21 and an external lead wire 23, respectively. Further, the first relay terminal 35 and the second relay terminal 36 are provided with the terminal block 3 arranged in the flange 28.
Lighting device 3 installed behind the ceiling 26 via 7
The power cord 38 connected to the output side of is connected.

External lead wire 21 and external lead wire 2
Since 2 and 23 are respectively connected to the base end sides of the pair of electrode shafts 7 and 8, when they are respectively connected to the first relay terminal 35 and the second relay terminal 36, both ends thereof are fixed. To be done. As a result, when the light projecting device 25 is transported, when it is mounted on the ceiling surface 26a, when the adjusting screws 30, 30 are loosened to change the irradiation direction of the light projecting device 25, the external lead wire 21 and the external lead wire 22 are provided. , 23 vibration and vibration are reduced. When the shaking or vibration of the outer lead wire 21 and the outer lead wires 22 and 23 is reduced, it acts in the direction of reducing the shaking or vibration of the high-pressure discharge lamp 4 itself, and thus is fixed to the neck portion 18 of the reflector 5. The stress on the sealing portion 14 is reduced. As a result, the high-pressure discharge lamp 4 is maintained firmly fixed to the reflector 5, and the displacement of the optical axis due to the displacement of the high-pressure discharge lamp 4 is prevented. Also,
Since the reflector 5 of the light projecting light source 2 can be downsized, the housing 27 can be downsized and the light projecting device 25 can be downsized. The light projecting device of the present invention is not limited to the light projecting device 25 shown in FIG. 3, and is a casing that houses the light projecting light source lighting device 1 of the present invention and at least the light projecting light source 2 of the light projecting light source lighting device 1. You just have to have a body.

Next, a third embodiment of the present invention will be described. FIG. 4 is a schematic sectional view of a projector showing a third embodiment of the present invention. The same parts as those in FIG. 1 or parts corresponding to the same parts are designated by the same reference numerals, and the description thereof will be omitted. The projector 39 shown in FIG. 4 is a color liquid crystal projector, and a light source 2 is provided inside a housing 40.
The projection light source lighting device 1 including the lighting device 3 and the lighting device 3 is housed. The lighting device 3 generates a rectangular-wave AC voltage when the AC voltage of the commercial AC power supply Vs is input, and lights the high-pressure discharge lamp 4. Furthermore, the housing 40 includes a condenser lens 41 that condenses the reflected light reflected by the reflection surface 17b of the reflector 5 of the light projecting light source 2 inside. The light emitted forward from the light projecting light source 2 is a color liquid crystal panel (LCD) 4
2 of the three primary colors RGB of this color liquid crystal panel 42
The image formed by the screen 4 through the condenser lens 41.
Project to 3. The image on the color liquid crystal panel 42 is controlled by the liquid crystal drive device 44 which receives a voltage supply from the commercial AC power supply Vs. Then, images of three colors are superimposed and projected on the screen 43, and a color image is displayed. The color liquid crystal panel 42 and the liquid crystal drive device 44 constitute an image forming unit that forms an image by projecting light from the reflector 5 of the projecting light source 2, and are respectively housed in the housing 40.

When the reflector 5 is downsized, the through hole 17c is formed.
Since the size of C affects the reflection efficiency of the reflector 5, it is preferable that the through hole 17c be as small as possible. Since the light projecting light source 2 has the one sealing portion 14 of the high pressure discharge lamp 4 directly fixed to the neck portion 18 of the reflector 5, the through hole 17c is provided.
Can be reduced, and the reflection efficiency of the reflector 5 can be improved. Moreover, since the sealing portion 14 is formed in a substantially circular shape and the undulations 16 are formed on the outer surface,
The sealing portion 14 and the neck portion 18 of the reflector 5 are firmly fixed to each other. That is, the projector 39 includes the high pressure discharge lamp 4
Since the one sealing portion 14 is firmly fixed to the neck portion 18 of the reflector 5, the deviation of the optical axis is prevented. In addition, since the reflector 5 of the light projecting light source 2 can be miniaturized, the housing 40 can be miniaturized, and the miniaturized projector 39 can be provided. The projection light source lighting device 1 or the projection light source 2 of the projector 39 may be used in an image projection device such as a digital microprocessor (DMD).

[0030]

According to the invention of claim 1, since the mark is displayed on the sealing portion of the high pressure discharge lamp embedded in the neck portion of the reflecting mirror, when the reflecting mirror and the lamp are combined, a mark is displayed. In addition, since the mark is embedded by the adhesive after the combination, the mark does not obstruct the optical optically. .

According to the invention of claim 2, in addition to the effect of claim 1, since the sealing portion having the undulations on the outer surface is fixed to the neck portion by the adhesive, the sealing portion moves or rotates. Is prevented, and the high-pressure discharge lamp can be firmly fixed to the reflector.

According to the third aspect of the present invention, the cross section in the direction perpendicular to the tube axis is formed in a substantially circular shape, and the sealing portion having the undulations on the outer surface is fixed to the neck portion with an adhesive.
The high-pressure discharge lamp can be firmly fixed to the reflector,
It is possible to provide a projection light source lighting device capable of miniaturizing a reflector.

According to the fourth aspect of the invention, since the light projecting light source lighting device can miniaturize the reflector of the light projecting light source, it is possible to provide a compact light projecting device.

According to the fifth aspect of the invention, the external lead wires electrically connected to the base end portions of the pair of electrode shafts are the outer surfaces of the first relay terminal and the reflector, which are provided in the case, respectively. Since it is connected to the second relay terminal provided on the side,
Since the stress on the sealing portion fixed to the neck portion of the reflector is reduced when the projector is being transported,
It is possible to maintain the high pressure discharge lamp firmly fixed to the reflector, and prevent the optical axis from being displaced due to the displacement of the high pressure discharge lamp or the like.

According to the sixth aspect of the present invention, the sealing portion having a substantially circular cross section in the direction perpendicular to the tube axis and the undulations formed on the outer surface is fixed to the neck portion of the reflector with an adhesive. Therefore, it is possible to provide a projector in which the high-pressure discharge lamp is firmly fixed to the reflector and the reflector can be miniaturized.

[Brief description of drawings]

FIG. 1 is a partially cutaway cross-sectional view of a projection light source lighting device according to a first embodiment of the present invention.

FIG. 2 is also an enlarged view of a main part in the XX direction of FIG.

FIG. 3 is a light projecting device showing a second embodiment of the present invention, (a) is a front view, and (b) is a partially cut-away side view.

FIG. 4 is a schematic sectional view of a projector showing a third embodiment of the present invention.

FIG. 5 is a partially cutaway sectional view of a high-pressure discharge lamp according to Related Art 1.

FIG. 6 is a partially cutaway sectional view of a high pressure discharge lamp according to Related Art 2.

[Explanation of symbols]

1 ……………… Light source lighting device 2 ……………… Projection light source 3 ……………… Lighting device as lighting means 4 ……………… High-pressure discharge lamp 5 ......... Reflector 16a ......... Mark 25 ………… Projector 27, 40 ... Housing 39 ………… Liquid crystal projector as a projector 42 ... Color liquid crystal panel forming image forming means 44 ... Liquid crystal driving device constituting image forming means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/74 F21M 1/00 N // F21Y 101: 00 Z (72) Inventor Tetsuo Otani Imabari City, Ehime Prefecture Harrison TOSHIBA LIGHTING CO., LTD. F-term (5-2, Asahi-cho) 3K042 AA01 AC06 BB05 CA00 5C043 AA04 BB09 CC03 CD01 CD06 DD12 EA01 5C058 AA06 AB03 BA35 EA51

Claims (6)

[Claims] 1. A bulb made of quartz glass having an intermediate portion having a discharge space and a pair of sealing portions integrally formed at both ends of the intermediate portion and having a substantially circular cross section in a direction perpendicular to the tube axis, and a seal. A base end portion is implanted in the stopper portion, and a pair of electrode shafts whose distal ends are spaced apart from each other in the discharge space, a pair of electrodes arranged at the distal ends of the electrode shafts, and one sealing portion are displayed. High-pressure discharge lamp having a discharge mark and a discharge medium sealed in the discharge space; a front surface of a light-projecting opening and an inner surface of the high-pressure discharge lamp to reflect light emitted from the high-pressure discharge lamp and project from the light-projecting opening. A reflector main body having a reflecting surface for light emission and a bottom portion facing the light projecting opening of the reflector main body are integrally formed so as to project outward, and one of the sealing portions is embedded with a mark by an adhesive. A reflector having a cylindrical neck portion directly fixed to A projection light source characterized by being provided. 2. One of the sealing portions fixed to the neck is
The projection light source according to claim 1, wherein an undulation is formed on the outer surface. 3. A projection light source according to claim 1 or 2, and a lighting means for stably forming discharge between electrodes of a high-pressure discharge lamp of the projection light source. Light source lighting device. 4. A light projecting device comprising: the light projecting light source lighting device according to claim 3; and a housing containing at least a light projecting light source of the light projecting light source lighting device. 5. The high pressure discharge lamp is provided with a pair of external lead wires electrically connected to the base end sides of the respective electrode shafts, and is fixed to the neck portion of the reflector in the housing. A first relay terminal connected to an external lead wire connected to the base end side of the electrode shaft implanted inside one sealing portion is provided, and the other one is provided on the outer surface side of the reflector. 5. The projection terminal according to claim 4, further comprising a second relay terminal connected to an external lead wire connected to the base end side of the electrode shaft implanted inside the sealing portion. Light equipment. 6. The projection light source lighting device according to claim 3, an image forming means for forming an image by projecting light from a reflector of the projection light source, and a projection light source lighting device and an image forming means. A projector comprising: a housing;