JP2010218871A - Light source device, projector, and manufacturing method of light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device, a projector and a manufacturing device of a light source device, with simple connection of a first conductor and a second conductor, with connection intensity and a heat radiation property improved. <P>SOLUTION: The light source device 60 for irradiating an illuminated area by reflecting light flux irradiated by emission of an arc tube 80 with a reflector 70 includes a first conductive wire 100 supplying power for making the arc tube 80 emit light, extended from an end face of the arc tube 80 (an end face 821 of a sealing part 82 structuring the arc tube 80) to be an illuminated area side of the arc tube 80, and a second conductive wire 200 extended from a power-supplying side, equipped with a connecting part 210 with its tip part formed in a spiral shape. As the first conductive wire 100 is inserted into the connecting part 210 and the connecting part 210 is crimped to the first conductive wire 100, the first conductive wire 100 and the second conductive wire 200 are connected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a light source device, a projector, and a method for manufacturing the light source device.

  2. Description of the Related Art Conventionally, in a light source device used in a projector, a connection structure as shown in FIG. 5 is used for connection of a conducting wire that supplies power for causing the light source device to emit light. Referring to FIG. 5 (a cross-sectional view showing the configuration of a conventional light source device), the light source of the conventional light source device 500 extends outward from the end face 511 of the arc tube 510 that is the emission direction (illuminated region side). The connection structure of the 1st conducting wire 501 and the 2nd conducting wire 502 extended from the side which supplies electric power is demonstrated.

  On the second conductor 502 side, a connector wire 504 connected via a connector 503 to a cable wire (not shown) extending from a power supply source (ballast) is inserted into one opening of the sleeve 505 and is crimped. Connecting. Then, one end of the second conducting wire 502 is inserted into the other opening of the sleeve 505 and crimped. The other end of the second conducting wire 502 extends from the back side of the reflector 520 through the inner space region of the reflector 520 via the notch 521 at the outer edge of the reflector 520 and extends to the connecting portion with the first conducting wire 501. Arrange. Next, the other end portion of the second conducting wire 502 is disposed so as to be substantially orthogonal to the first conducting wire 501 extending from the end surface 511 of the arc tube 510 which is the light emission direction of the light source device 500 to the outside, Electrical welding is performed to connect the first conductor 501 and the second conductor 502. In this way, the first conducting wire 501 and the second conducting wire 502 are connected and conducted.

  When the first conductive wire 501 and the second conductive wire 502 connected in this manner are kept in a high temperature state due to insufficient cooling of the arc tube 510, the welded portion is detached due to the oxidation of the first conductive wire 501 and the second conductive wire 502. It becomes easy. In Patent Document 1, welding of a lead wire (first lead wire) and an external lead wire (second lead wire) from an end portion of the arc tube sealing portion to the arc tube sealing portion on the light emission side of the discharge lamp. It is disclosed that a wiring member having a shape having a larger outer surface area than a cylindrical shape having a maximum value smaller than the diameter of the end face of the arc tube sealing portion is provided in the portion. With this configuration, heat dissipation is improved and the temperature of the arc tube sealing portion is lowered. By lowering the temperature of the arc tube sealing portion, oxidation of the first conductor and the second conductor can be suppressed, and the welded portion is difficult to come off.

JP 2006-324206 A

  However, in patent document 1, the connection member as another member is needed and there exists a subject that the connection structure of a 1st conducting wire and a 2nd conducting wire is not easy. In addition, the conventional connection structure of the first conductive wire 501 and the second conductive wire 502 described above has a relatively low connection strength (welding strength), and the first conductive wire 502 is strongly pulled from the outside. There exists a subject that the welding part with the conducting wire 501 becomes easy to remove | deviate. Accordingly, there has been a demand for a light source device, a projector, and a method of manufacturing the light source device that have a simple connection structure between the first conductor and the second conductor, improve connection strength, and improve heat dissipation.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  (Application Example 1) A light source device according to this application example is a light source device that reflects a light beam emitted by light emission of an arc tube by a reflector and emits it to an illuminated area, and (a) causes the arc tube to emit light. A first conducting wire that extends from the end face of the arc tube, which is the illuminated region side of the arc tube, and (b) a connecting portion that extends from the power supply side and has a tip formed in a spiral shape A first conducting wire is inserted into the connecting portion, and the connecting portion is crimped to the first conducting wire, whereby the first conducting wire and the second conducting wire are connected to each other. To do.

  According to such a light source device, it has the structure which can be formed simply, providing the connection part formed in a spiral shape in the front-end | tip part of a 2nd conducting wire. Then, the first conductive wire is inserted into the spirally formed connecting portion, and the connecting portion is crimped, so that the spiral portions are in contact with the first conductive wire and are crimped. The area is increased, and the connection strength can be improved as compared with the conventional case. In addition, since the connection portion is formed in a spiral shape, the surface area of the spiral shape after the pressure bonding is also increased compared to the conventional case, so that the heat dissipation can be improved.

  Application Example 2 In the light source device according to the application example described above, it is preferable that the outer shape of the crimped connection portion in the planar direction perpendicular to the illumination optical axis be within the outer shape of the end face of the arc tube in the planar direction.

  According to such a light source device, the light beam emitted from the arc tube is prevented from being blocked by the connection portion, and the amount of light emitted from the light source device toward the illuminated region is not reduced.

  (Application Example 3) In the light source device according to the application example described above, the first conductor extends from the end surface along the illumination optical axis of the arc tube, and the connection portion is substantially orthogonal to the extension direction of the second conductor. It is preferable to be bent.

  According to such a light source device, for example, when the first conducting wire extends from the end face of the arc tube along the illumination optical axis, the first conducting wire is bent in a direction substantially orthogonal to the extending direction of the second conducting wire. By inserting and crimping the first conducting wire into the formed connecting portion, it is possible to suppress the amount of projection of the second conducting wire toward the illuminated region. Moreover, since it becomes easy to perform the compact routing of the 2nd conducting wire via the outer edge part (notch part) of a reflector, the working efficiency at the time of manufacturing a light source device can be improved.

  Application Example 4 In the light source device according to the application example described above, the first conducting wire extends from the end surface along the illumination optical axis of the arc tube, and the tip is bent so as to be substantially orthogonal to the illumination optical axis. Are preferably formed in substantially the same direction with respect to the extending direction of the second conducting wire.

  According to such a light source device, for example, the first conducting wire extends from the end face of the arc tube along the illumination optical axis, and the distal end connected to the second connection portion is bent so as to be substantially orthogonal to the illumination optical axis. In this case, the first conductor is inserted into and crimped to the connecting portion formed in the substantially same direction with respect to the extending direction of the second conductor body, so that the second conductor in the direction of the illuminated region is The amount of popping out can be suppressed. Moreover, since it becomes easy to perform the compact routing of the 2nd conducting wire via the outer edge part (notch part) of a reflector, the working efficiency at the time of manufacturing a light source device can be improved.

  Application Example 5 A projector according to this application example includes any one of the light source devices described above and an optical modulation device that modulates a light beam emitted from the light source device based on an image signal to form an optical image. It is characterized by.

  According to such a projector, the connection structure between the first conductive wire and the second conductive wire is simple, and the life of the light source device can be extended by providing the light source device that improves connection strength and heat dissipation. Therefore, the brightness quality of the projected image can be maintained for a long time.

  Application Example 6 A method of manufacturing a light source device according to this application example is a method of manufacturing a light source device that reflects a light beam emitted by light emission of an arc tube to a region to be illuminated after being reflected by a reflector. A first conducting wire that supplies electric power to emit light and extends from the end face of the arc tube that is the illuminated region side of the arc tube, and a connection portion that extends from the power supply side and has a tip formed in a spiral shape (A) an inserting step of inserting the first conducting wire into a connecting portion of the second conducting wire; and (b) connection of the second conducting wire to the first conducting wire inserted in the inserting step. A crimping step of crushing the portion and crimping the first conductor.

  According to such a method for manufacturing a light source device, it is possible to easily improve the connection strength between the first conductor and the second conductor and to improve the heat dissipation by performing the insertion step and the crimping step. it can.

Sectional drawing which shows the structure of the light source device which concerns on 1st Embodiment. Process drawing which shows the connection process which connects a 1st conducting wire and a 2nd conducting wire. The figure which shows the optical system of the projector using a light source device. Sectional drawing which shows the structure of the light source device which concerns on 2nd Embodiment. Sectional drawing which shows the structure of the conventional light source device.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)

  FIG. 1 is a cross-sectional view showing the configuration of the light source device according to the first embodiment. The configuration of the light source device 60 will be described with reference to FIG.

  In the drawings for explaining the present embodiment (FIG. 1 and FIG. 3 to be described later), the direction of the illumination optical axis L of the light beam emitted from the light source device 60 toward the illuminated region side is the X-axis direction, An XYZ orthogonal coordinate system in which the direction orthogonal to the X-axis direction and perpendicular to the paper surface in FIG. 1 is the Y-axis direction, and the direction orthogonal to the X-axis direction and parallel to the paper surface in FIG. In addition, the traveling direction of the light beam is defined as the + X direction, the left direction along the + X direction is defined as the + Y direction, and the upward direction along the + X direction is defined as the + Z direction.

  The light source device 60 includes an arc tube 80 and a reflector 70. The arc tube 80 includes a spherical light emitting portion 81 at the center and a pair of cylindrical sealing portions 82 and 83 formed to be connected to both sides of the light emitting portion 81. In addition, in the light emitting portion 81, two electrodes 84 and 85 made of tungsten with the tips close to each other are installed, and the base ends of the electrodes 84 and 85 are connected to the metal foils 86 and 87, respectively. At the same time, they are supported by the sealing portions 82 and 83, respectively.

  Metal foils 86 and 87 formed of molybdenum foil or the like are embedded in the sealing portions 82 and 83 in an airtight manner. In addition, one end of the first conductive wire 100 for supplying power to the electrode 84 is connected to the metal foil 86, and the other end of the first conductive wire 100 extends from the end surface 821 of the sealing portion 82 to the illumination light. It extends substantially parallel to the axis L. In the present embodiment, a molybdenum wire containing molybdenum as a main component is employed as the first conductive wire 100, but a tungsten wire may be employed. Similarly, one end of the first conductive wire 110 for supplying power to the electrode 85 is connected to the metal foil 87, and the other end of the first conductive wire 110 extends from the end surface 831 of the sealing portion 83 to the illumination. It extends substantially parallel to the optical axis L. In the present embodiment, a molybdenum wire mainly composed of molybdenum is used as the first conducting wire 110.

  In the present embodiment, the arc tube 80 employs a high-pressure mercury lamp, and mercury, a rare gas, a small amount of metal halide, and the like are enclosed in the light emitting unit 81. The arc tube 80 is made of heat-resistant glass (for example, quartz glass). The arc tube 80 is not limited to a high-pressure mercury lamp, and may be a metal halide lamp, a xenon lamp, or the like.

  The reflector 70 includes a reflector main body 71 having an elliptical concave surface and a cylindrical portion 72 for inserting and fixing one sealing portion 83 of the arc tube 80. The reflector body 71 has a reflective layer 73 having a high reflectance formed of a dielectric multilayer film on the concave surface of the reflector body 71. The cylindrical portion 72 is a cylindrical body extending from the central portion of the reflective layer 73 and the reflector body 71 to the opposite side of the reflective layer 73, and a through-hole 721 coaxial with the rotational center of the reflective layer 73 on the inside thereof. have. The reflector main body 71 and the cylinder part 72 are integrally formed in a substantially funnel shape with heat-resistant glass.

  The light emitting unit 81 is aligned so that an arc image generated by arc discharge between the electrode 84 and the electrode 85 is reflected by the reflection layer 73 and projected to a predetermined position, and is disposed on the reflection layer 73 side of the reflector 70. Is done. After the alignment, the gap between the inner surface of the through hole 721 and the outer surface of one sealing portion 83 is filled with the adhesive E, and the inner surface of the through hole 721 and the outer surface of the sealing portion 83 are mutually connected. By being fixed, the arc tube 80 and the reflector 70 are fixed. The adhesive E covers the end surface 831 of the sealing portion 83. In this embodiment, the adhesive E employs a silica-based or alumina-based inorganic adhesive.

  Note that the power for causing the arc tube 80 of the light source device 60 to emit light (arc discharge) is supplied from a ballast (not shown). The light source device 60 has a connection cable 90 connected via a connector 98 to a conducting wire that transmits power output from the ballast.

  The connection cable 90 includes two connector wires 91 and 95 and a male connector 98 that connects the connector wires 91 and 95. Note that a connector (not shown) connecting a conductive wire for transmitting power output from the ballast is a female connector.

  The connector wire 91 includes a conductor 92 composed of a stranded wire obtained by combining a plurality of conducting wires, a second conducting wire 200 that is connected to the first conducting wire 100 and disposed in the internal space of the reflector 70, and the conductor 92 and the second conducting wire. 200 and a metal tube sleeve 300 that connects to 200. The conductor 92 is covered with an insulator 93. Here, the sleeve 300 connects the conductor 92 and the second conductor 200 by inserting and crimping the conductor 92 from one opening end and inserting and crimping the second conductor 200 from the other opening end. Is conducting.

  The connector wire 95 is configured to include a conductor 96 constituted by a stranded wire obtained by twisting a plurality of conducting wires, and a metal tube sleeve 310 connecting the conductor 96 and the first conducting wire 110. The conductor 96 is covered with an insulator 97. Here, the sleeve 310 is crimped by inserting the conductor 96 from one opening end. Then, the sleeve 310 in this state is processed to bend the substantially center at a substantially right angle.

  Then, the first conducting wire 110 is inserted from the other open end of the sleeve 310 and crimped. As a result, the conductor 96 and the first conductive wire 110 are connected by the sleeve 310 to be conducted. In addition, the amount of protrusion of the connector wire 95 from the back side of the reflector 70 is suppressed by bending the sleeve 310.

  Here, the second conducting wire 200 connected to the first conducting wire 100 extending from the end face of the arc tube 80 (in this embodiment, the end face 821 of the sealing portion 82) has the second conducting wire body 201 in a substantially W shape. It has a bent shape. A connecting portion 210 for connecting to the first conducting wire 100 extending from the end face 821 of the sealing portion 82 is configured at one end portion of the second conducting wire 200.

  Specifically, the connecting portion 210 is configured by forming the second conductor main body 201 in a spiral shape in a direction substantially orthogonal to the second conductor main body 201 of the second conductor 200. The connection part 210 is formed in a so-called coil spring shape. Further, the distance from the connecting portion 210 of the second conducting wire 200 to the end portion of the other second conducting wire 200 crimped to the sleeve 300 passes through the inner space of the reflector 70 via the notch 74 at the outer edge portion. Yes.

  FIG. 2 is a process diagram showing a connection process for connecting the first conductor and the second conductor. With reference to FIG. 1, FIG. 2, the connection process which connects the 1st conducting wire 100 and the 2nd conducting wire 200 is demonstrated.

  First, an insertion step S <b> 1 for inserting the first conductor 100 into the connection part 210 of the second conductor 200 is performed. Specifically, the distal end portion of the first conducting wire 100 is inserted into the connection portion 210 formed in a spiral shape of the second conducting wire 200. In this case, the connection part 210 of the 2nd conducting wire 200 is moved, and the front-end | tip part of the 1st conducting wire 100 is inserted so that it may become a predetermined position.

  Next, a crimping step S <b> 2 is performed in which the connecting portion 210 of the second conductor 200 is crushed and crimped to the first conductor 100 with respect to the tip of the first conductor 100 inserted in the insertion step. For the crimping, a welding machine is used. In this embodiment, spot welding is performed using an electric resistance welder (not shown). More specifically, a current is applied in combination with crushing the connection portion 210 of the second conductor 200 by applying pressure, and the connection portion 210 crushed by the resistance heat and the first portion sandwiched between the crushed connection portion 210. The contact portion is welded by melting the conductor 100.

  Through the above steps, the connection between the distal end portion of the first conducting wire 100 and the connecting portion 210 of the second conducting wire 200 is completed, and the first conducting wire 100 and the second conducting wire 200 can be conducted. In addition, when the 1st conducting wire 100 and the 2nd conducting wire 200 (connection part 210) are crimped | bonded, the external shape (outer shape B) of the connection part 210 in the plane P direction orthogonal to the illumination optical axis L after crimping | bonding Is within the outer shape (outer shape A) in the plane P direction of the end surface 821 of the sealing portion 82. Note that the outer shape A of the sealing portion 82 of the present embodiment is substantially circular. Thereby, the light flux directed toward the illuminated region reflected by the reflective layer 73 of the reflector 70 is not blocked by the connecting portion 210.

FIG. 3 is a diagram illustrating an optical system of a projector using the light source device.
The configuration and operation of the optical system of the projector 1 will be described with reference to FIG.

  The projector 1 has an optical system. The optical system modulates a light beam emitted from the light source device 60 based on an image signal to form an optical image, and projects a screen SC or the like via the projection optical system 50. A projected image is formed on the target surface.

  The optical system of the projector 1 includes an integrator illumination optical system 10, a color separation light guide optical system 20, an optical modulation device, a color synthesis optical system, and a projection optical system 50. The integrator illumination optical system 10 is an optical system for uniformizing the illuminance in a plane orthogonal to the illumination optical axis L with respect to the light beam emitted from the light source device 60. The color separation light guide optical system 20 is an optical system that separates the illumination light beam from the integrator illumination optical system 10 into three color lights of red (R), green (G), and blue (B) and guides them to the illuminated area. It is a system.

  The optical modulation device is an optical system that modulates each of the three color lights separated by the color separation light guide optical system 20 based on an image signal, and includes red (R), green (G), and blue (B). Three liquid crystal devices 30R, 30G, and 30B are used corresponding to the three color lights. The color synthesizing optical system is an optical system that synthesizes optical images modulated by optical modulators (three liquid crystal devices 30R, 30G, and 30B), and uses a cross dichroic prism 40. The projection optical system 50 is an optical system that projects an optical image synthesized by the color synthesis optical system (cross dichroic prism 40) onto a projection target surface such as a screen SC.

  The integrator illumination optical system 10 includes a light source device 60 that emits an illumination light beam toward the illuminated area, a concave lens 11 that emits the focused light from the light source device 60 as substantially parallel light, and a plurality of illumination light beams emitted from the concave lens 11. And a first lens array 12 having a plurality of first small lenses 12a for dividing the partial light flux.

  Further, the integrator illumination optical system 10 includes a second lens array 13 having a plurality of second small lenses 13 a corresponding to the plurality of first small lenses 12 a of the first lens array 12, and each part from the second lens array 13. And a polarization conversion element 14 that converts the light beam into approximately one type of linearly polarized light having a uniform polarization direction and emits the light. Further, the integrator illumination optical system 10 includes a superimposing lens 15 for superimposing the partial light beams emitted from the polarization conversion element 14 in the illuminated area.

  As shown in FIG. 1, the light source device 60 includes a reflector 70 and an arc tube 80 having a light emission center near the first focal point of the reflector 70. The light source device 60 emits a light beam having the illumination optical axis L as the central axis.

  The concave lens 11 is disposed in the illuminated area of the reflector 70. Then, the light from the reflector 70 is emitted toward the first lens array 12.

  The first lens array 12 has a function as a light beam splitting optical element that splits the light from the concave lens 11 into a plurality of partial light beams, and the plurality of first small lenses 12a are in a plane orthogonal to the illumination optical axis L. It has a configuration arranged in a matrix of multiple rows and multiple columns. The outer shape of the first small lens 12a is similar to the outer shape of the image forming regions of the liquid crystal devices 30R, 30G, and 30B.

  The second lens array 13, together with the superimposing lens 15, has a function of forming an image of each first small lens 12a of the first lens array 12 in the vicinity of the image forming area of the liquid crystal devices 30R, 30G, and 30B. The second lens array 13 has substantially the same configuration as the first lens array 12, and a plurality of second small lenses 13a are arranged in a matrix of a plurality of rows and a plurality of columns in a plane orthogonal to the illumination optical axis L. Have a configuration.

  The polarization conversion element 14 is a polarization element that emits the polarization direction of each partial light beam divided by the first lens array 12 as approximately one type of linearly polarized light having the same polarization direction. The polarization conversion element 14 includes a polarization separation layer, a reflection layer, and a retardation plate. Then, the polarization separation layer transmits one linearly polarized light component among the polarized light components included in the light flux emitted from the light source device 60 and reflects the other linearly polarized light component in a direction perpendicular to the illumination optical axis L. The reflective layer reflects the other linearly polarized light component reflected by the polarization separation layer in a direction parallel to the illumination optical axis L. The retardation plate converts one linearly polarized light component transmitted through the polarization separation layer into the other linearly polarized light component.

  The superimposing lens 15 condenses a plurality of partial light beams that have passed through the first lens array 12, the second lens array 13, and the polarization conversion element 14 and superimposes them in the vicinity of the image forming regions of the liquid crystal devices 30R, 30G, and 30B. This is an optical element. The superimposing lens 15 is arranged so that the optical axis of the superimposing lens 15 and the illumination optical axis L of the integrator illumination optical system 10 substantially coincide. The superimposing lens 15 may be composed of a compound lens in which a plurality of lenses are combined.

  The color separation light guide optical system 20 includes dichroic mirrors 21 and 22, reflection mirrors 23, 24, and 25, an incident side lens 26, a relay lens 27, and condensing lenses 28R, 28G, and 28B. The color separation light guide optical system 20 separates the illumination light beam emitted from the superimposing lens 15 into three color lights of red light, green light, and blue light, and the three liquid crystal devices 30R that are to be illuminated. , 30G, 30B.

  The liquid crystal devices 30 </ b> R, 30 </ b> G, and 30 </ b> B modulate the illumination light beam based on the image signal, and are the illumination target of the integrator illumination optical system 10. The liquid crystal devices 30R, 30G, and 30B are obtained by sealing and enclosing a liquid crystal that is an electro-optical material in a pair of transparent glass substrates, and will be described later according to an input image signal using, for example, a polysilicon TFT as a switching element. The polarization direction of one type of linearly polarized light emitted from the incident side polarizing plate is modulated.

  In front of the optical path of the liquid crystal devices 30R, 30G, and 30B, condenser lenses 28R, 28G, and 28B for adjusting the incident angle are arranged. Although not shown, an incident-side polarizing plate is interposed between the condenser lenses 28R, 28G, and 28B and the liquid crystal devices 30R, 30G, and 30B, and the liquid crystal devices 30R, 30G, and 30B are disposed. An exit-side polarizing plate is interposed between 30B and the cross dichroic prism 40, respectively. The incident-side polarizing plate, the liquid crystal devices 30R, 30G, and 30B, and the exit-side polarizing plate modulate light of each color light incident thereon.

  The cross dichroic prism 40 is an optical device that forms a color image by synthesizing an optical image modulated for each color light emitted from the emission side polarizing plate. The cross dichroic prism 40 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and a dielectric multilayer film is formed on a substantially X-shaped interface in which the right-angle prisms are bonded together. The dielectric multilayer film formed at one of the substantially X-shaped interfaces reflects red light, and the dielectric multilayer film formed at the other interface reflects blue light. By these dielectric multilayer films, the red light and the blue light are bent and aligned with the traveling direction of the green light, so that the three color lights are synthesized.

  The color image emitted from the cross dichroic prism 40 is enlarged and projected by the projection optical system 50 to form a projection image on the screen SC as a projection target surface.

According to the embodiment described above, the following effects can be obtained.
(1) The light source device 60 of the present embodiment has a configuration that can be easily formed by providing the connecting portion 210 formed in a spiral shape at the tip of the second conducting wire 200. The first conducting wire 100 is inserted into the spirally formed connecting portion 210 and the connecting portion 210 is crimped, so that the spiral portions are respectively crimped to the first conducting wire 100. And the connection strength can be improved as compared with the conventional case. In addition, since the connection portion 210 is formed in a spiral shape, the surface area of the spiral shape after the pressure bonding is also increased compared to the conventional case, so that the heat dissipation can be improved.

  (2) According to the light source device 60 of the present embodiment, the outer shape B of the connecting portion 210 in the plane P direction orthogonal to the illumination optical axis L after the first conducting wire 100 and the second conducting wire 200 are pressure-bonded is The end face 821 of the sealing portion 82 which becomes the end face of the arc tube 80 is within the outer shape A in the plane P direction. Thereby, it is avoided that the light beam emitted from the arc tube 80 and reflected by the reflecting layer 73 is blocked by the connecting portion 210 and is wasted, and the amount of light emitted from the light source device 60 toward the illuminated area is reduced. I will not let you.

  (3) According to the light source device 60 of the present embodiment, the first conducting wire 100 extends from the end surface 821 of the sealing portion 82 along the illumination optical axis L, and is substantially in the extending direction of the second conducting wire body 201. The first conducting wire 100 is inserted into and crimped to a connecting portion 210 formed by bending in an orthogonal direction. Thereby, the protrusion amount of the 2nd conducting wire 200 to a to-be-illuminated area direction can be suppressed. Moreover, since it becomes easy to perform the compact routing of the 2nd conducting wire 200 via the outer edge part (notch part 74) of the reflector 70, the working efficiency at the time of manufacturing the light source device 60 can be improved. Moreover, the size reduction of the light source device 60 can be maintained.

  (4) According to the light source device 60 of the present embodiment, the connection strength between the first conducting wire 100 and the second conducting wire 200 can be improved. Therefore, when the second conducting wire 200 (connector wire 91) is strongly pulled from the outside when the light source device 60 is assembled, the welded portion with the first conducting wire 100 is difficult to come off. Thereby, the assembly efficiency of the light source device 60 can be improved.

  (5) According to the light source device 60 of the present embodiment, the heat dissipation can be improved by the connecting portion 210, so that the oxidation of the first conducting wire 100 and the second conducting wire 200 can be suppressed. Therefore, the connection strength between the first conducting wire 100 and the second conducting wire 200 can be maintained for a long time. Thereby, the oxidation of the 1st conducting wire 100 and the metal foil 86 in the sealing part 82 can also be suppressed, and the connection strength of the 1st conducting wire 100 and the metal foil 86 can also be maintained for a long period of time.

  (6) According to the light source device 60 of the present embodiment, since the cooling efficiency can be improved by improving the heat dissipation by the connecting portion 210, the temperature of the sealing portion 82 can be efficiently lowered. Therefore, since the temperature of the arc tube 80 can also be lowered efficiently, the temperature of the arc tube 80 can be made appropriate and the life of the light source device 60 can be extended.

  (7) According to the projector 1 of the present embodiment, since the light source device 60 having the above-described effects is provided, the brightness quality of the projected image can be maintained for a long time. In addition, by reducing the number of replacements of the light source device 60, it is possible to reduce industrial waste.

(8) According to the method for manufacturing the light source device 60 of the present embodiment, the insertion step S1 for inserting the first conductive wire 100 into the connecting portion 210 of the second conductive wire 200, and the second insertion with respect to the inserted first conductive wire 100. There is a crimping step S2 in which the connecting portion 210 of the conducting wire 200 is crushed and crimped to the first conducting wire 100. By performing these two steps, the connection strength between the first conductive wire 100 and the second conductive wire 200 can be easily improved and the heat dissipation can be improved.
(Second Embodiment)

FIG. 4 is a cross-sectional view illustrating the configuration of the light source device according to the second embodiment. In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The XYZ orthogonal coordinate system appended to FIG. 4 is the same as the XYZ orthogonal coordinate system in FIGS. 1 and 3 used in the first embodiment. Further, the light source device 61 of the present embodiment is replaced with the light source device 60 in the optical system in the first embodiment, so that the projector 1 is configured as in the first embodiment.
With reference to FIG. 4, the structure and operation | movement of the light source device 61 of this embodiment are demonstrated.

  In the light source device 61 of the present embodiment, the first conducting wire 150 included in the arc tube 80 is different from the first conducting wire 100 of the first embodiment. Moreover, the 2nd conducting wire 250 which the connection cable 90 connected with the 1st conducting wire 150 has differs from the 2nd conducting wire 200 of 1st Embodiment.

  Specifically, the first conductor 150 of the present embodiment extends along the illumination optical axis L from the end surface 821 of the sealing portion 82 that becomes the end surface of the arc tube 80, and the tip portion thereof is substantially parallel to the illumination optical axis L. It is bent so as to be orthogonal (-Z direction in FIG. 4). Further, the second conducting wire 250 has a connecting portion 260 formed in a spiral shape in substantially the same direction with respect to the extending direction of the second conducting wire main body 201. Other configurations are the same as those in the first embodiment.

  In addition, the front-end | tip part of the 1st conducting wire 150 and the helical connection part 260 of the 2nd conducting wire 250 are connected. In detail, it connects by the connection method similar to having demonstrated in FIG.

  First, the insertion step S <b> 1 is performed, and the distal end portion of the first conducting wire 150 is inserted into the connection portion 260 formed in a spiral shape of the second conducting wire 250. Next, the crimping step S <b> 2 is performed, and the connecting portion 260 of the second conducting wire 250 is crushed and crimped to the first conducting wire 150 against the tip of the first conducting wire 150 inserted in the inserting step. Since the method of pressure bonding is the same as that of the first embodiment, description thereof is omitted.

  Through the above steps, the connection between the distal end portion of the first conducting wire 150 and the connecting portion 260 of the second conducting wire 250 is completed, and the first conducting wire 150 and the second conducting wire 250 can be conducted. Note that the outer shape (outer shape C) of the connecting portion 260 in the plane P direction orthogonal to the illumination optical axis L after the first conducting wire 150 and the second conducting wire 250 (connecting portion 260) are pressure-bonded is a sealing portion. 82 is within the outer shape (outer shape A) in the plane P direction of the end surface 821 of the head. Thereby, the light flux directed toward the illuminated region reflected by the reflective layer 73 of the reflector 70 is not blocked by the connecting portion 260.

  The light source device 61 according to the second embodiment has the same configuration as that of the light source device 60 according to the first embodiment except that the shapes of the first conducting wire 150 and the second conducting wire 250 are different from each other. In addition to having the corresponding effect as it is among the effects of the light source device 60 according to the embodiment, the following effects can be obtained.

  (1) According to the light source device 61 of the present embodiment, the first conducting wire 150 extends from the end surface 821 of the sealing portion 82 along the illumination optical axis L, and the tip thereof is substantially orthogonal to the illumination optical axis L. The first conducting wire 150 is inserted into and crimped to a connecting portion 260 that is bent in this manner and formed in substantially the same direction as the direction in which the second conducting wire main body 201 extends. Thereby, the protrusion amount of the 2nd conducting wire 250 to an illuminated region direction can be suppressed. Moreover, since it becomes easy to perform the compact routing of the 2nd conducting wire 250 which passed the outer edge part (notch part 74) of the reflector 70, the working efficiency at the time of manufacturing the light source device 61 can be improved. Further, the light source device 61 can be kept downsized.

  The present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the invention. A modification will be described below.

  (Modification 1) In the first and second embodiments, the outer shape B of the connecting portion 210 and the outer shape C of the connecting portion 260 in the plane P direction orthogonal to the illumination optical axis L after being crimped are: In addition, it is within the outer shape A in the plane P direction of the end surface 821 of the sealing portion 82. However, the present invention is not limited to this, and may be larger than the outer shape A and may not be within the outer shape A. As a result, the light beam emitted from the arc tube 80 and reflected by the reflective layer 73 is slightly blocked by the connecting portions 210 and 260, but the first conducting wire 100, the second conducting wire 200, and the first conducting wire 150 are blocked. And the connection strength of each of the 2nd conducting wire 250 can be improved further, and heat dissipation can also be improved further.

  (Modification 2) In the first and second embodiments, the connecting portions 210 and 260 are formed in a spiral shape, in other words, in a coil spring shape. However, the connecting portion does not have to have a spring property and may have any form as long as it has a spiral shape.

  (Modification 3) The projector 1 according to the first and second embodiments includes a lens integrator optical system including the first lens array 12 and the second lens array 13 as an optical system for uniformizing the illuminance of the emitted light beam. Although used, the present invention is not limited to this, and a rod integrator optical system including a light guide rod can also be used.

  (Modification 4) Although the projector 1 of the first and second embodiments is applied as a front type projector, it can also be applied to a rear type projector integrally having a screen as a projection target surface.

  (Modification 5) In the optical system of the projector 1 according to the first and second embodiments, the liquid crystal devices 30R, 30G, and 30B as the optical modulators use transmissive liquid crystal devices, but reflective liquid crystals. It is also possible to use a reflection type optical modulation device such as a device.

  (Modification 6) In the optical system of the projector 1 according to the first and second embodiments, the liquid crystal devices 30R, 30G, and 30B as optical modulation devices are used. However, the present invention is not limited to this, and in general, any device that modulates an incident light beam based on an image signal may be used, and a micromirror optical modulator or the like may be used. For example, a DMD (Digital Micromirror Device) can be used as the micromirror type optical modulation device.

  (Modification 7) In the optical system of the projector 1 of the first and second embodiments, the optical modulator uses three liquid crystal devices 30R, 30G, and 30B corresponding to red light, green light, and blue light. The so-called three-plate method is adopted. However, the present invention is not limited to this, and a single plate method may be adopted. Further, a liquid crystal device for improving the contrast may be additionally employed.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 60, 61 ... Light source device, 70 ... Reflector, 80 ... Light emission tube, 81 ... Light emission part, 82, 83 ... Sealing part, 100, 150 ... 1st conducting wire, 200, 250 ... 2nd conducting wire, 201 ... 2nd conducting wire main body, 210, 260 ... Connection part, L ... Illumination optical axis.

Claims (6)

A light source device that reflects a light beam emitted by light emission of an arc tube to a illuminated area by reflecting it with a reflector,
A first conducting wire that supplies power for causing the arc tube to emit light, and extends from an end surface of the arc tube that is on the illuminated region side of the arc tube;
A second conductor having a connection portion extending from the power supply side and having a tip formed in a spiral shape,
The light source device, wherein the first conducting wire is inserted into the connecting portion, and the connecting portion is crimped to the first conducting wire, whereby the first conducting wire and the second conducting wire are connected. The light source device according to claim 1,
The light source device according to claim 1, wherein an outer shape of the crimped connecting portion in a planar direction perpendicular to an illumination optical axis is within an outer shape of the end face of the arc tube in the planar direction. The light source device according to claim 1 or 2,
The first conductive wire extends from the end surface along the illumination optical axis of the arc tube,
The light source device according to claim 1, wherein the connection portion is formed by being bent in a direction substantially orthogonal to the extending direction of the second conducting wire. The light source device according to claim 1 or 2,
The first conductive wire extends from the end face along the illumination optical axis of the arc tube, and is bent so that the tip is substantially perpendicular to the illumination optical axis,
The light source device according to claim 1, wherein the connecting portion is formed in substantially the same direction with respect to the extending direction of the second conducting wire. The light source device according to any one of claims 1 to 4,
A projector comprising: an optical modulation device that modulates a light beam emitted from the light source device based on an image signal to form an optical image. A method of manufacturing a light source device that reflects a light beam emitted by light emission of an arc tube to a illuminated area by reflecting it with a reflector,
A first conductive wire that supplies power for causing the arc tube to emit light, extends from an end surface of the arc tube that is the illuminated region side of the arc tube, and a tip portion that extends from the power supply side A second conducting wire having a connecting portion formed in a spiral shape,
An insertion step of inserting the first conductor into the connection portion of the second conductor;
A method of manufacturing a light source device, comprising: a crimping step of crushing the connecting portion of the second conducting wire and crimping the first conducting wire inserted in the inserting step to the first conducting wire.

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