JP2006220857A - Light source device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of lengthening a life of a light source lamp with a simple constitution. <P>SOLUTION: The projector is provided with a first connector 551 and a second connector 552 at 180°rotation symmetrical positions with respect to an illumination light axis on the bottom surface 54B side of a side wall 54C of a lamp case 54 and on the top surface 54A side of a side wall 54D thereof. Thereby, when first using a light source device 50, the first connector 551 is inserted to a light source plug part and a power is supplied to a light source lamp 51. When rotating the light source device 50 by 180°, the second connector 552 is moved to the position of the light source plug part. Therefore, only by rotating the light source device 50 by 180° and connecting the second connector 552 to the light source plug part with such a simple constitution, positions which are likely to suffer a damage due to heat of the light source lamp 51 can be easily dispersed and the life of the light source lamp 51 can be lengthened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light source device that emits a light beam from a light source, and a projector equipped with the light source device.

  The illuminance of a lamp of a light source device provided in an optical apparatus such as a projector tends to rapidly decrease when the accumulated time exceeds 1000 hours. This is because when the arc tube is exposed to high temperature, air convection occurs in the arc tube, and the upper side of the arc tube becomes hot and the lower side becomes cold. It is because it crystallizes and devitrifies. Further, as the crystallization phenomenon progresses, it becomes the starting point for the rupture of the arc tube, and the lamp life is shortened. In order to solve such a problem, a configuration in which a lamp is rotated to extend the life of the lamp is conventionally known (see, for example, Patent Document 1).

  In the device described in Patent Document 1, the optical axis of a metal halide lamp in which an electrode is sealed with quartz glass and the axis of a lamp reflector are coaxial, and sealing portions at both ends of the metal halide lamp are built in the holding means. The bearing is rotatably held. And the structure by which a metal halide lamp rotates periodically because the sealing part by the side of a lamp reflector receives rotational torque from a motor via a torque transmission part is taken.

Japanese Patent Laid-Open No. 3-48836 (refer to page 2, page 3, and FIG. 1)

  By the way, in the structure as described in Patent Document 1, the crystallization of quartz is prevented from proceeding only on one side of the quartz glass of the metal halide lamp by rotating the metal halide lamp by the torque of the motor. However, in such a configuration, it is necessary to attach rotating means such as a motor and a torque transmission unit to the light source device, and thus the configuration is complicated.

  An object of the present invention is to provide a light source device and a projector that can extend the life of a light source lamp with a simple configuration in view of the above circumstances.

  The light source device of the present invention includes a light source lamp having a light emitting tube in which discharge light emission is performed between a pair of electrodes, a reflector that emits a light beam emitted from the light emitting tube in a certain direction, and the light source lamp inside. A light source device including a lamp housing for housing, the light source device including a plurality of connectors provided on the lamp housing and capable of supplying electric power from the outside to the pair of electrodes. Is arranged at a rotationally symmetric position of a predetermined angle with the optical axis of the light beam emitted from the center as the center.

  In the light source device configured as in the present invention, the plurality of connectors are provided at rotationally symmetric positions at a predetermined angle with respect to the illumination optical axis. In this configuration, one of the plurality of connectors is connected to, for example, a power supply unit for a light source provided in advance in an installation unit for installing the light source lamp, and a voltage is applied between the electrodes of the light emitting tube of the light source lamp. The lamp tube is rotated by the predetermined angle before the crystal crystallization of the arc tube of the light source lamp, and the above-mentioned light source power supply unit is connected to the other connector, thereby connecting the arc tube to the predetermined tube. It is possible to flow heat to the other part of the arc tube by rotating it by the angle of. Therefore, the devitrification phenomenon due to crystallization of quartz can be prevented, and the life of the arc tube can be extended. Further, when the lamp housing is rotated by a predetermined angle, the other connector moves to the position where the connector and the power supply unit were connected before the rotation, so that the other connector can be easily connected to the power supply unit. be able to. Therefore, the life of the light source lamp can be easily extended by a simple operation of rotating the lamp housing by a predetermined angle and replacing the connector.

  In the light source device of the present invention, the lamp housing has a plurality of fixing portions that fix the lamp housing at rotationally symmetric positions of the predetermined angle around the optical axis of the light beam emitted from the light source lamp. It is preferable to provide.

  In such a configuration, the fixed portion is provided at a predetermined rotationally symmetric position with respect to the illumination optical axis. Accordingly, when the lamp housing is rotated by a predetermined angle with respect to the illumination optical axis, the other fixing portion moves to the position of the fixing portion attached to the attaching portion before the rotation. Therefore, when the light source device is attached to a light source installation portion provided in, for example, a projector, the fixing portion is disposed at the same position even if the lamp housing of the light source device is rotated by a predetermined angle, so that the attachment operation can be easily performed.

  In the light source device of the present invention, the predetermined angle is preferably 180 degrees.

  In this configuration, the connector is provided at a position that is 180 degrees rotationally symmetric with respect to the illumination optical axis of the light source lamp. As a result, the place where the lamp housing is easily damaged by the heat of the arc tube can be dispersed 180 degrees simply by rotating the lamp housing 180 degrees. Further, since it is only necessary to provide the connector at a position that is 180 degrees rotationally symmetric with respect to the illumination optical axis, the configuration can be simplified, and the configuration of the lamp installation portion to which the lamp housing is attached can be simplified.

  On the other hand, in the light source device of the present invention, the predetermined angle may be 90 degrees.

  In this configuration, the connector is provided at a position that is 90 degrees rotationally symmetric with respect to the illumination optical axis of the light source lamp. Thus, for example, every time the accumulated usage time of the light source lamp reaches a predetermined time, if the lamp housing is rotated 90 degrees, the arc tube is also rotated 90 degrees. Therefore, the part damaged by the heat of the arc tube can be shifted by 90 degrees, and the heat damage can be further dispersed. Therefore, the life of the arc tube can be further extended.

  In the light source device of the present invention, it is preferable that the plurality of connectors are electrically connected to the pair of electrodes of the arc tube, respectively.

  In such a configuration, the light source lamp is electrically connected to the plurality of connectors by, for example, lead wires. Accordingly, even if the light source device is rotated by a predetermined angle and the connector to be connected to the power supply unit is switched, power can be supplied to the light source lamp because all the connectors are electrically connected to the light source lamp. Therefore, it is possible to save the trouble of rewiring when the connector is switched, and to improve the workability during maintenance. Therefore, the replacement work of the light source lamp and the rotation work of rotating the light source lamp can be easily performed.

  Furthermore, in the light source device of the present invention, it is preferable that identification means for identifying the plurality of connectors is provided.

  In the light source device having such a configuration, since an identification unit for identifying a plurality of connectors is provided, for example, a used connector and an unused connector can be easily identified. Therefore, it is possible to easily recognize the installation direction of the light source device without erroneously inserting a used connector into the power supply plug.

  At this time, it is preferable that the identification means is a seal attached to at least one of the plurality of connectors.

  In this configuration, a seal is affixed to at least one connector. Thereby, for example, if a seal is affixed to an unused connector, the unused connector and the used connector can be easily identified when the light source device is rotated by a predetermined angle. Further, when the connector is provided at a 180-degree rotationally symmetric position, the connector can be identified with a configuration in which the seal is simply attached to one connector. If the seal is applied in this way, the connector can be easily identified without providing complicated identification means. Such a seal may be affixed to all of the plurality of connectors, for example. In order to identify each, a number or a symbol identifying the connector such as “1” or “2” is a seal. May be described. Moreover, such a seal | sticker may be peeled off at the time of use of a connector, and may break a seal | sticker with a plug and may penetrate.

  In the present invention, the light source device as described above includes a light modulation element that optically modulates a light beam emitted from the light source device, and a plurality of optical elements that guide the light beam emitted from the light source device to the light modulation element. And a projection lens that projects the light-reflected light beam onto the screen.

  In the projector having such a configuration, the life of the light source lamp can be extended by rotating the light source lamp of the light source device by a predetermined angle as described above, so that the lamp life of the projector can be extended. Can do.

  Further, the projector as described above has a time measuring unit for recognizing a time when the arc tube of the light source device emits a light beam, and a cumulative time when the arc tube emits the light beam by the time measuring unit is set to a predetermined time. When it is recognized that the light source device has been reached, it is preferable to include notification means for notifying request information requesting that the light source device be rotated by a predetermined angle.

  In such a configuration, it is provided with time measuring means such as a timer for measuring the time when the light flux is emitted from the arc tube of the light source device, and the notification means uses the luminous flux of the arc tube measured by the time measuring means. When it is recognized that the cumulative time of emission has reached a predetermined time, notification information for rotating the light source device by a predetermined angle is notified. As this notification means, for example, notification information may be notified as an image from a projection lens of a projector, or notification information may be notified outside the projector as a blinking signal. With such a configuration, the user can easily recognize when the light source device should be rotated. Therefore, the operation of rotating the light source device is not forgotten, the devitrification of the arc tube of the light source lamp can be prevented, and the life of the light source lamp can be extended.

[Overall configuration of projector]
A projector according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a projector according to the present embodiment. In FIG. 1, reference numeral 100 denotes a projector. The projector 100 modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the formed optical image on a screen. . The projector 100 includes an exterior case 110 that forms a space in which an optical component housing that houses various optical elements can be housed.

  A part of the front surface of the outer case 110 is formed in a recessed shape, and a circular opening is formed in the recessed portion. And the projection lens 3 is attached to this opening part in the state which the front-end side part protrudes in the front side of the exterior case 110. FIG. In addition, an intake opening 111 is formed on the front side of the exterior case 110 on the right side of the opening where the projection lens 3 is provided. The intake opening 111 is formed by a plurality of communication holes that allow communication between the inside and the outside of the apparatus. Further, a light receiving window 112 is formed on the front side of the outer case 110 on the left side where the projection lens 3 is provided. The light receiving window 112 is for receiving control light from a remote controller (not shown). Further, a light source switching notification unit 118 as notification means is formed below the light receiving window 112. The light source switching notification unit 118 is provided with a lamp and notifies the switching timing of the light source device 50 described later by turning on the lamp.

  A large number of communication holes 113 are formed on the upper surface of the outer case 110 at positions corresponding to built-in speakers (not shown). A control unit 114 is provided on the upper surface of the exterior case 110 at a substantially central portion. The control unit 114 is formed with various formed switch groups. In this switch group, for example, a main switch for turning on and off the main power supply, a switch for changing various settings of the projector, and the like are arranged.

  A lamp removal port 115 is formed on the back side of the upper surface of the outer case 110. A cover 116 is attached to the lamp removal opening 115. Then, when removing the light source device 50 attached to the optical component casing 46 (to be described later) housed in the projector 100, the cover 116 is removed and the lamp removal port 115 is opened.

  An exhaust opening 117 (see FIG. 2) that communicates the inside and outside of the projector is provided on the back surface of the exterior case 110. Further, a power connection section (not shown), an external output section (not shown), and the like are provided on the back side of the outer case 110.

[Internal structure of projector]
FIG. 2 is a schematic diagram schematically showing the inside of the projector. FIG. 3 is a schematic view schematically showing the inside of the optical component housing.
2 and 3, the optical unit 4 and the power supply unit 6 are juxtaposed inside the outer case 110. In addition, a control circuit board 7 for device drive control is disposed inside the outer case 110 on the bottom side of the optical unit 4. The power supply unit 6 and the optical unit 4 are each electrically connected to the control circuit board 7.

  The optical unit 4 optically processes the light beam emitted from the light source to form an optical image (color image) corresponding to the image information, and enlarges and projects it on a screen (not shown) via the projection lens 3. Is a unit. Although not shown in detail, the projection lens 3 is configured as a combined lens in which a plurality of lenses are housed inside a lens barrel. The projection lens 3 enlarges and projects a color image formed by an optical device 44 described later on a screen (not shown).

  The optical unit 4 positions the integrator illumination optical system 41, the color separation optical system 42, the relay optical system 43, the optical device 44, and these optical components 41, 42, 43, 44 on a predetermined illumination optical axis. And an optical component casing 46 to be disposed.

  The integrator illumination optical system 41 is an optical system for making the luminous flux emitted from the light source uniform in the illumination optical axis orthogonal plane. The integrator illumination optical system 41 includes a light source device 50, a collimating concave lens 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415.

  The light source device 50 emits the light beam emitted from the light source lamp 51 in a certain direction. The light source device 50 includes a light source lamp 51 and a reflector 52, details of which will be described later. The light beam emitted from the light source lamp 51 is emitted as convergent light by the reflector 52 to the front side of the apparatus.

  The collimating concave lens 411 collimates the light beam emitted from the light source device 50 and emits it to the first lens array 412.

  The first lens array 412 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each of these small lenses divides the light beam emitted from the light source device 50 into a plurality of partial light beams and emits them in the direction of the illumination optical axis. The contour shape of each small lens is set so as to be substantially similar to the shape of an image forming area (light modulation surface) of a liquid crystal panel 45 as a light modulation element to be described later.

  The second lens array 413 has substantially the same configuration as the first lens array 412, and has a configuration in which small lenses are arranged in a matrix. The second lens array 413 has a function of forming an image of each small lens of the first lens array 412 on a liquid crystal panel 45 described later of the optical device 44 together with the superimposing lens 415.

  The polarization conversion element 414 is disposed between the second lens array 413 and the superimposing lens 415. The polarization conversion element 414 converts the light beam emitted from the second lens array 413 into approximately one type of linearly polarized light. Each partial light beam converted into approximately one type of linearly polarized light by the polarization conversion element 414 is substantially superimposed on an image forming area (light modulation surface) of a liquid crystal panel 45 (to be described later) of the optical device 44 by the superimposing lens 415. Is done. Here, in a projector using a liquid crystal panel 45 of a type that modulates linearly polarized light, only one type of linearly polarized light can be used, and therefore approximately half of the light emitted from the light source device 50 that emits randomly polarized light cannot be used. For this reason, in the present embodiment, by using the polarization conversion element 414, the light emitted from the light source device 50 is converted into substantially one type of linearly polarized light, and the light use efficiency in the optical device 44 is increased. Such a polarization conversion element 414 is introduced in, for example, Japanese Patent Application Laid-Open No. 8-304739.

  The color separation optical system 42 includes two dichroic mirrors 421 and 422 and two reflection mirrors 423 and 424. The reflection mirror 423 reflects the light beam incident from the integrator illumination optical system 41 in the illumination optical axis direction where the dichroic mirrors 421 and 422 are arranged. The dichroic mirrors 421 and 422 separate the plurality of partial light beams emitted from the integrator illumination optical system 41 into red, green, and blue color lights.

  Specifically, the dichroic mirror 421 transmits the red light component of the light beam emitted from the integrator illumination optical system 41 in the direction in which the reflection mirror 423 is disposed, and reflects the blue light component and the green light component. . The red light transmitted through the dichroic mirror 421 is reflected by the reflection mirror 423, then passes through the field lens 419, and reaches a later-described red light side liquid crystal panel 45 (45R) of the optical device 44. The field lens 419 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to the illumination optical axis.

  The dichroic mirror 422 reflects the green light component of the blue light component and the green light component transmitted through the dichroic mirror 421 to the optical device 44 side. The green light component reflected by the dichroic mirror 422 passes through the field lens 419 and reaches a later-described green light side liquid crystal panel 45 (45G) of the optical device 44.

  The relay optical system 43 includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434. The relay optical system 43 guides the blue light separated by the color separation optical system 42 to a liquid crystal panel 45 (45B) on the blue light side described later of the optical device 44.

  Here, the relay optical system 43 is used for the blue light component because the optical path length of the blue light component is shorter than the optical path length of the other color light components. This is for the purpose of preventing the decrease of the above. That is, this is to transmit the partial light beam incident on the incident side lens 431 to the field lens 419 as it is.

  In this embodiment, since the optical path length of the blue light component is short, the relay optical system 43 is arranged on the optical path of the blue light component. However, a configuration in which the optical path length of the red light component is shortened is also conceivable. . In such a case, the relay optical system 43 may be disposed on the optical path of the red light component.

  The optical device 44 modulates an incident light beam according to image information to form a color image. The optical device 44 includes three incident-side polarizing plates 441 to which the respective color lights separated by the color separation optical system 42 are incident, and a liquid crystal panel 45 (45R, 45G, 45) disposed at the subsequent stage of the incident-side polarizing plate 441. 45B) and the exit side polarizing plate 442, and a cross dichroic prism 443.

  The liquid crystal panel 45 (45R, 45G, 45B) is a liquid crystal which is an electro-optical material hermetically sealed in a pair of transparent glass substrates. For example, according to a given image signal using a polysilicon TFT as a switching element, The polarization direction of the polarized light beam emitted from the incident side polarizing plate 441 is modulated.

  The cross dichroic prism 443 is an optical element that synthesizes an optical image modulated for each color light emitted from the emission side polarizing plate to form a color image. The cross dichroic prism 443 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and a dielectric multilayer film is formed at the interface where the right-angle prisms are bonded together. One of the approximately X-shaped dielectric multilayer films reflects red light, and the other dielectric multilayer film reflects blue light. These dielectric multilayer films cause red light and blue light to be reflected. The light is 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 443 is enlarged and projected by the projection lens 3 to form a large screen image on a screen (not shown).

  Although not shown in detail, the optical component casing 46 is composed of a component storage member that is open at the top and formed in a box shape, and a lid-shaped member that covers the opening of the component storage member. Among these, a large number of grooves are formed in the component storage member, and the components constituting the optical components 41, 42, 43, 44 other than the light source device 50 are fitted into these grooves, so that each component is fitted. It is stored in the component storage member.

  Next, a detailed description of the light source device 50 will be described with reference to FIGS. FIG. 4 is a perspective view showing the light source device. FIG. 5 is a plan view schematically showing an arc tube of a light source lamp constituting the light source device. FIG. 6 is a plan view showing the top surface of the light source device. FIG. 7 is a side view of the light source device. FIG. 8 is a front view of the light source device as seen from the illumination emission direction side.

  As shown in FIG. 4, the light source device 50 includes a light source lamp 51, a reflector 52, a lamp holding portion 53, a lamp case 54 as a lamp housing, and a connector 55. The light source device 50 emits a radial light beam from a light source lamp 51, and the radiated light emitted from the light source lamp 51 is reflected by a reflector 52 and emitted to the outside.

  As shown in FIG. 5, the light source lamp 51 includes a light emitting portion 512 made of quartz glass that is located at the center and swells in a substantially spherical shape, and a pair of sealing portions 513 extending on both sides of the light emitting portion 512. The

  A substantially spherical discharge space is formed in the light emitting portion 512, and a pair of electrodes 514, mercury, a rare gas, and a small amount of halogen are enclosed in the discharge space.

  Inside the pair of sealing portions 513, a molybdenum metal foil 515 electrically connected to the pair of electrodes 514 is inserted and sealed with a glass material or the like. Each metal foil 515 is further connected to a lead wire 531 as an electrode lead wire, and the lead wire 531 extends to the outside of the light source lamp 51.

  When a voltage is applied to the lead wire 531, a potential difference is generated between the electrodes 514 through the metal foil 515, so that a discharge is generated, an arc image is generated, and the light emitting unit 512 emits light. At this time, the heat released along with the arc discharge flows upward, and air convection occurs in the arc tube 511. In this embodiment, an ultra-high pressure mercury lamp is used as the light source lamp. However, a metal halide lamp, a high-pressure mercury lamp, a xenon lamp, a high-pressure sodium lamp, a short arc lamp, or the like may be applied.

  The reflector 52 employs a parabolic mirror whose surface is curved. In the present embodiment, an ellipsoidal mirror is used as the reflector 52. However, the present invention is not limited to this, and a parabolic mirror may be used. The reflector 52 has a hole (not shown) through which the lead wire 531 connected to the arc tube 511 of the light source lamp 51 is inserted. Further, a substantially cylindrical shade member 52 </ b> A is attached to the front surface of the reflector 52. The shade member 52A is fixed to the lamp case 54 by, for example, screwing, and the reflector 52 is attached to the lamp case 54 via the shade member 52A.

  The lamp holding unit 53 holds the light source lamp 51 and the reflector 52 in a detachable manner. The lamp holder 53 is detachably fixed to the lamp case 54. With such a lamp holder 53, when replacing the light source lamp 51, for example, in maintenance work, the lamp holder 53 is removed from the lamp case 54, and the light source lamp 51 is further removed from the lamp holder 53 for replacement work. It becomes possible to carry out.

  The lamp case 54 is a substantially cylindrical member having a substantially square cross section, and an end portion in the illumination emission direction where the light beam is emitted from the light source lamp 51 and an end portion opposite to the illumination emission direction are opened. The lamp case 54 includes a top surface 54A, a bottom surface 54B, and side walls 54C and 54D. Two light source lamp mounting portions 541 having curved portions 542 at positions corresponding to the lamp holding portions 53 are attached to both side walls 54C and 54D on the inner surface of the lamp case 54 so as to connect the side walls 54C and 54D. Yes. These light source lamp mounting portions 541 sandwich and hold the lamp holding portion 53 with the curved portion 542.

  In addition, a plurality of slit holes 543 that connect the inside and the outside of the lamp case 54 are formed on the illumination emission direction side of the side walls 54C and 54D of the lamp case 54, that is, on the side where the light flux is emitted from the light source lamp 51. Yes.

  Furthermore, a light source mounting piece 544A as a fixing portion is positioned in a position corresponding to the top surface 54A on the illumination emission direction side on the right side wall 54C as viewed from the illumination emission direction side of the lamp case 54 in a direction substantially orthogonal to the side wall 54C. Is formed to protrude. Further, a light source mounting piece 544B as a fixing portion is formed on the side wall 54C so as to protrude in a direction substantially orthogonal to the side wall 54C at a position corresponding to the bottom surface 54B opposite to the illumination emission direction. The light source mounting pieces 544A and 544B and the side wall 54C are formed in a tapered shape having long sides and short sides on the protruding side. Further, on the left side wall 54D of the lamp case 54 as viewed from the illumination emission direction side, a light source mounting piece 544C as a fixing portion projects in a direction substantially perpendicular to the side wall 54D at a position corresponding to the bottom surface 54B on the illumination emission direction side. A light source mounting piece 544D as a fixing portion is formed to protrude in a direction substantially orthogonal to the side wall 54C at a position corresponding to the top surface 54A opposite to the illumination emission direction of the side wall 54D. The light source mounting pieces 544A and 544B and the side wall 54C are formed in a tapered shape having long sides and short sides on the protruding side. The light source mounting piece 544A and the light source mounting piece 544C are formed at 180 ° rotationally symmetrical positions with respect to the illumination optical axis of the light source lamp 51, and the light source mounting piece 544B and the light source mounting piece 544D are the illumination optical axis of the light source lamp 51. Are formed at rotationally symmetrical positions with respect to each other. The light source mounting pieces 544A, 544B, 544C, and 544D are formed with screw holes 545 that communicate in the vertical direction, that is, in the direction from the top surface 54A to the bottom surface 54B or from the bottom surface 54B to the top surface 54A. Has been.

  The connector 55 includes a first connector 551 provided at a substantially central position corresponding to the top surface 54A of the side wall 54D of the lamp case 54, and a second connector 552 provided at a substantially central position corresponding to the bottom surface 54B of the side wall 54C. ing. That is, the first connector 551 and the second connector 552 are provided at rotationally symmetrical positions 180 degrees with respect to the illumination optical axis of the light source lamp 51. The first connector 551 is formed in a box shape with an opening on the bottom surface 54B side, and on the top surface 54A side of the first connector 551, two connector pins 553 are erected toward the opening on the bottom surface 54B side. . The connector pins 553 are electrically connected to the lead wires 531 on the top surface 54A side of the first connector 551, and are electrically connected to the electrodes 514 of the arc tube 511 via the lead wires 531. Yes. On the other hand, the second connector 552 is formed in a box shape having an opening on the top surface 54A side, and two connector pins 553 are erected from the bottom surface 54B side of the second connector 552 toward the opening on the top surface 54A side. Yes. These connector pins 553 are electrically connected to the lead wires 531 on the bottom surface 54B side, and are electrically connected to the arc tube 511 via the lead wires 531.

  Each connector 55 is provided with a protruding piece 554 that protrudes outward. In this embodiment, the protruding piece 554 protrudes in a direction orthogonal to the side walls 54C and 54D, but is provided in a direction parallel to the illumination optical axis of the light source lamp 51. Alternatively, the protruding piece 554 may not be formed.

  When the light source device 50 is used for the first time, the first connector 551 is inserted into the light source plug portion 471 of the light source installation portion 47 (described later) provided in the optical component casing 46, and the light source lamp is connected to the first connector 551. Power is supplied to 51. On the other hand, when the light source device 50 is used for the first time, a seal indicating that it is not used is attached to the second connector 552. When the light source device 50 is rotated 180 degrees in order to disperse the heat damage of the light source lamp 51 during maintenance of the light source device 50, the seal attached to the second connector 552 is peeled off. Two connectors 552 are inserted into the light source plug portion 471.

  Next, the light source installation unit 47 in which the light source device 50 is installed will be described with reference to FIG. FIG. 9 is a perspective view schematically showing the mounting position of the light source device in the optical component casing.

  The optical component housing 46 includes a light transmission surface 461 in which an opening window 462 is formed between the collimating concave lens 411 of the integrator illumination optical system 41 and the light source device 50. A light source installation portion 47 is formed integrally with the optical component casing 46 at a position adjacent to the light transmission surface 461. As shown in FIG. 2, the light source installation portion 47 is provided on the back side inside the projector 100 at a position facing the lamp removal port 115 of the exterior case 110. The light source installation unit 47 is mounted with the light source plug unit 471 as a power supply unit to which the first connector 551 or the second connector 552 of the light source device 50 is connected, and the top surface 54A or the bottom surface 54B of the light source device 50. And a mounting portion 474 to which the light source mounting pieces 544A, 544B, 544C, and 544D can be mounted.

  The installation surface 472 has a planar shape that is substantially the same as the planar shape of the top surface 54 </ b> A and the bottom surface 54 </ b> B of the light source device 50. The light source device 50 is installed on the installation surface 472 such that the end of the light source device 50 on the illumination emission direction side is in contact with the light transmission surface 461.

  The light source plug portion 471 is formed to protrude toward the upper surface side of the projector 100 on the side of the installation surface 472 facing the rear surface of the projector 100. The light source plug portion 471 has two holes, and a cylindrical plug that is electrically connected to the power supply unit 6 is provided in the hole. When the light source device 50 is installed on the light source installation section 47, the connector 55 (if the bottom surface 54B and the installation surface 472 are installed facing each other, the first connector 551, the top surface 54A and the installation surface 472 are made facing each other. When installed, the connector pin 553 of the second connector 552) is inserted into the hole of the light source plug portion 471, and the connector pin 553 and the plug are engaged and electrically connected.

  Further, an engaging groove portion 473A for engaging the light source mounting piece 544C (544A) is formed on the light transmitting surface 461 side of the light source plug portion 471. The engaging groove portion 473A is formed in a shape that allows the light source mounting piece 544C (544A) to be engaged, that is, a substantially trapezoidal shape having a long side on the installation surface 472 side and a short side on the side away from the installation surface 472. The light source device 50 is positioned by engaging the light source mounting piece 544C (544A) with the engaging groove portion 473A.

  Further, a stopper 473 </ b> B is protruded from the end of the installation surface 472 opposite to the light transmission surface 461. When the light source device 50 is installed in the light source installation portion 47, the stopper 473B comes into contact with the end of the bottom surface 54B (top surface 54A) of the light source device 50 opposite to the illumination emission direction. Position it.

  The attachment portion 474 is provided on the side opposite to the light transmission surface 461 of the light source plug portion 471 and at a position adjacent to the light transmission surface 461. These mounting portions 474 are provided at positions where the upper surface side of the mounting portion 474 contacts the lower surface side of the light source mounting pieces 544A and 544D when the bottom surface 54B of the light source device 50 is placed on the installation surface 472. Yes. These mounting portions 474 are provided with mounting holes 474A, and screws A and B are screwed into the mounting holes 474A from the screw holes 545 of the light source mounting pieces 544A and 544D to fix the light source device 50. .

  The power supply unit 6 converts an alternating current input from an external power source into a direct current, converts the direct current into a predetermined voltage corresponding to an electronic component constituting the apparatus body, supplies the electronic component, and An AC rectangular wave current is generated from the DC current and supplied to the light source device 50. The power supply unit 6 includes a power supply unit cover body formed of a material capable of electromagnetic shielding such as aluminum.

  The control circuit board 7 is fixed to the bottom surface side of the optical unit 4 by a fixing method such as screwing. The control circuit board 7 is a circuit board that is electrically connected to the integrator illumination optical system 41, the optical device 44, the power supply unit 6, the control unit 114, and the like and performs drive control of the entire apparatus of the projector 100. The control circuit board 7 performs drive control of the liquid crystal panel 45 of the optical device 44 in accordance with image information input from a device connected to the projector 100, and also performs brightness control of the light source device 50 by the power supply unit 6. . The control circuit board 7 is provided with a timer (not shown) as time measuring means. This timer is initialized, for example, when the light source device 50 is installed in the light source installation unit 47, and measures the light beam emission time when a light beam is emitted from the arc tube 511 of the light source device 50. When the luminous flux emission time of the arc tube 511 reaches a predetermined cumulative time, for example, 1000 hours, the lamp of the light source switching notification unit 118 of the outer case 110 is turned on to notify that the light source device 50 is rotated. Note that the control circuit board 7 may further notify notification information indicating that the rotation of the light source device 50 is requested from a built-in speaker (not shown), and display image information indicating that the rotation of the light source device 50 is requested from the projection lens. You may project.

  In addition, an intake fan 8 </ b> A is provided inside the projector 100 at a position facing the intake opening 111. An exhaust fan 8 </ b> B is provided between the exhaust opening 117 on the back side of the projector 100 and the slit hole 543 provided in the light source device 50. Then, the intake fan 8A sucks cooling air from the intake opening 111 and causes the cooling air to flow inside the projector 100, and the exhaust fan 8B sends the air heated inside the projector 100 to the outside. Exhaust. Further, the exhaust fan 8B forms an air flow path that passes through the inside of the light source device 50 from the slit hole 543 provided in the side wall 54C (54D) of the light source device 50 and passes through the side wall 54D (54C). Cool down.

[Projector operation]
(Maintenance of light source device)
In projector 100 of the present embodiment, when light source device 50 is used for the first time, top surface 54A of light source device 50 is placed on the upper surface so that second connector 552 with a sticker is on the lower side. Then, the lamp removal port 115 of the exterior case 110 of the projector 100 is opened, and the top surface 54A of the light source device 50 is attached to the light source installation unit 47 through the lamp removal port 115 so that the top surface 54A is on the upper surface side of the projector 100. For this purpose, the light source mounting piece 544C of the light source device 50 is inserted and engaged with the engaging groove 473A from the tip side, and the end opposite to the illumination emission direction of the bottom surface 54B of the light source device 50 is engaged with the stopper 473B. The bottom surface 54B is placed on the installation surface 472. Then, the screws A and B are screwed into the mounting holes 474A of the mounting portion 474 from the screw holes 545 of the light source mounting pieces 544A and 544D, and the light source device 50 is fixed. Thereafter, the cover part 116 is attached to the lamp removal opening 115 to close the lamp removal opening 115.

  When the timer of the control circuit board 7 recognizes that the usage time of the light source lamp 51 of the light source device 50 has reached about 1000 hours, the control circuit board 7 turns on the lamp of the light source switching notification unit 118. Then, the user is notified that the light source device 50 is to be rotated. When the user recognizes that the lamp of the light source switching notification unit 118 is lit, the user removes the cover unit 116 again, opens the lamp removal port 115, removes the screws A and B, and removes the light source device 50. Then, the seal attached to the opening of the second connector 552 of the light source device 50 is peeled off. Then, the light source mounting piece 544A of the light source device 50 is inserted and engaged with the engaging groove portion 473A from the front end side, and the end of the light source device 50 on the side opposite to the illumination emission direction is engaged with the stopper 473B. The top surface 54A is placed on the installation surface 472. Then, the screws A and B are screwed into the mounting holes 474A of the mounting portion 474 from the screw holes 545 of the light source mounting pieces 544C and 544B, and the light source device 50 is fixed. Thereafter, the cover part 116 is attached to the lamp removal port 115 to close the lamp removal port 115.

  As described above, by rotating the light source device 50 by 180 degrees and replacing it, the arc tube 511 is rotated by 180 degrees as well as the part that is damaged by the heat generated by the arc discharge. That is, the position where the arc tube 511 receives heat damage can be dispersed.

[Projector effects]
In the projector 100 of the embodiment as described above, the first connector is positioned 180 degrees rotationally symmetrical with respect to the illumination optical axis on the bottom surface 54B side of the side wall 54C of the lamp case 54 and the top surface 54A side of the side wall 54D. 551 and a second connector 552 are provided. Therefore, when the light source device 50 is rotated 180 degrees, the first connector 551 moves to the position of the second connector 552 before rotation, and the second connector 552 moves to the position of the first connector 551 before rotation. Therefore, when the light source device 50 is used for the first time, the first connector 551 is inserted into the light source plug portion 471 to supply power to the light source lamp 51, and after a predetermined time has elapsed, the light source device 50 is rotated 180 degrees. Thus, the arc tube 511 in the light source device 50 can be easily rotated 180 degrees simply by inserting the light source plug portion 471 into the second connector 552. Therefore, with such a simple configuration, the positions where the arc tube 511 is easily damaged can be dispersed, and the lifetime of the arc tube 511 can be extended.

  The first connector 551 and the second connector 552 are both connected to the light source lamp 51 by lead wires. Therefore, power can be supplied to the light source lamp 51 regardless of which of the first connector 551 and the second connector 552 is inserted into the light source plug portion 471. Therefore, when the light source device 50 is rotated 180 degrees, there is no need to reconnect the light source lamp 51, the first connector 551, and the second connector 552 with lead wires, and the light source device 50 is rotated to connect the connector 55. The power source can be easily supplied to the light source device 50 only by switching.

  Furthermore, when the light source device 50 is used for the first time, a seal is attached to the opening of the second connector 552. For this reason, the 1st connector 551 and the 2nd connector 552 can be distinguished easily. Therefore, when the light source device 50 is removed from the light source installation portion 47, the direction in which the light source device 50 is attached can be easily recognized. Accordingly, it is possible to prevent an erroneous operation such as an error of the connector 55 to be connected. Further, by using such a seal, the connector 55 can be easily identified at a low cost.

  A light source mounting piece 544A is provided at a position corresponding to the top surface 54A on the illumination emission direction side of the side wall 54C of the lamp case 54. The light source mounting piece 544A is rotationally symmetrical by 180 degrees with respect to the illumination optical axis of the light source lamp 51. The light source mounting piece 544C is provided at a position corresponding to the bottom surface 54B of the side wall 54D on the illumination emission direction side. Further, a light source mounting piece 544B is provided at a position corresponding to the bottom surface 54B opposite to the illumination emission direction of the side wall 54C, and the light source mounting piece is positioned 180 degrees rotationally symmetrical with respect to the illumination optical axis of the light source mounting piece 544B. 544D is provided. For this reason, when the light source device 50 is rotated 180 degrees, the rotated light source mounting pieces 544C and 544B move to the positions of the light source mounting pieces 544A and 544D before the rotation. Therefore, when the light source device 50 is attached to the light source installation portion 47 with the bottom surface 54B and the installation surface 472 facing each other, the light source attachment pieces 544A and 544D are attached to the attachment portion 474, and the light source device 50 is attached to the light source installation portion 47. When the light source attachment pieces 544C and 544B are attached to the attachment portion 474, the light source device 50 can be easily installed on the light source installation portion 47. By adopting such a configuration, the light source installation portion 47 includes two attachment portions 474 to which the light source attachment piece 544A or the light source attachment piece 544C is attached, and two attachment portions 474 to which the light source attachment piece 544D or the light source attachment piece 544B is attached. Since the light source device 50 can be attached by providing only one, the configuration is simplified, and the light source device 50 can be easily attached.

  A plurality of slit holes 543 are formed in the side walls 54 </ b> C and 54 </ b> D of the lamp case 54. Therefore, the cooling air introduced into the projector 100 by the intake fan 8A and the exhaust fan 8B is discharged from the slit hole 543 of the other side wall 54D through the slit hole 543 of the one side wall 54C. . For this reason, the light source lamp 51 can be cooled with the cooling air, and the life of the light source lamp 51 can be extended.

  Further, the exhaust fan 8B includes a slit hole 543 provided in the side wall 54D (or the side wall 54C when the top surface 54A and the installation surface 472 face each other) and an exhaust opening 117 provided on the back side of the projector 100. An exhaust fan 8B is provided between them. For this reason, since the air flow path is formed between the slit holes 543 provided in the side walls 54C and 54D in the exhaust fan 8B, the light source lamp 51 can be cooled more effectively.

  The timer of the control circuit board 7 measures the usage time of the arc tube 511 after the light source device 50 is installed. If the cumulative usage time of the arc tube 511 is about 1000 hours, the control circuit board 7 A notification process for urging the user to rotate the light source device 50 by turning on the lamp of the light source switching notification unit 118 is performed. For this reason, the user can easily recognize the accumulated usage time of the arc tube 511 of the light source device 50 and can rotate the light source device 50 before the arc tube 511 is devitrified by heat.

[Other embodiments]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

  For example, in the above-described embodiment, the example in which the opening seal of the second connector 552 is pasted is shown, but the present invention is not limited to this. That is, it is good also as a structure by which the seal | sticker is affixed on both the 1st connector 551 and the 2nd connector 552. In this case, when the light source device 50 is used for the first time, one of these connectors 55 is peeled off, and the connector 55 with the seal peeled off is inserted into the light source plug portion 471. Further, the present invention is not limited to the configuration in which the seal is peeled off. For example, the connector 55 may be inserted into the light source plug portion 471 and the seal is broken to connect the connector 55 with the seal applied to the opening. Furthermore, the means for identifying the first connector 551 and the second connector 552 is not limited to the seal as in the above embodiment, but may be a cover engaged with the opening of the connector 55, for example. In this configuration, the cover may be engaged with either the first connector 551 or the second connector of the light source device 50, or the cover may be engaged with both. When the covers are engaged with both, the cover of the connector 55 to be used is removed and inserted into the light source plug portion 471. Even in such a configuration, when the light source device 50 is removed, the connector 55 with the cover and the connector 55 with the cover removed can be easily identified. Therefore, the light source device 50 is rotated 180 degrees and the light source is installed again. When attaching to the unit 47, the orientation of the light source device 50 and the connector 55 connected to the light source plug unit 471 are not mistaken, and erroneous operation can be prevented.

  Further, in the above embodiment, the usage time of the arc tube 511 is measured by a timer, and when the luminous flux emission time of the arc tube 511 reaches a predetermined accumulated time, the lamp of the light source switching notification unit 118 is turned on to prompt the user. Although the example which alert | reports was shown, it is not restricted to this. For example, it is good also as a structure which detects the crystallization of the quartz glass of the light emission part 512 of the arc_tube 511 and the sealing part 513 with a sensor. In this configuration, for example, a sensor that detects the illuminance of the light source lamp is provided in the vicinity of the light source lamp 51 or at a position along the illumination optical axis of the light source lamp 51. The sensor then outputs a predetermined detection signal corresponding to the illuminance of the light source lamp to the control circuit board 7. On the other hand, when the control circuit board 7 detects that the illuminance of the light source sensor has decreased by a predetermined amount based on the detection signal input from the sensor, for example, in the image projected on the screen from the projection lens 3, the light source lamp For example, a telop or the like for requesting replacement of the image is displayed. In such a configuration, the user can easily know when to rotate the light source device 50 by this telop or the like, so that the light source device 50 can be rotated before the illuminance of the light source lamp 51 is significantly reduced. Therefore, the lifetime of the light source lamp 51 can be efficiently extended.

  In the above embodiment, an example in which the lamp removal port 115 is formed from the upper surface to the side surface of the projector has been described. However, the position of the lamp removal port 115 is not limited, and the light source device 50 is provided in the light source installation unit 47. What is necessary is just to be provided in the position which can be attached. For example, it is good also as a structure by which the lamp removal port is provided ranging from the upper surface to the back surface.

  In addition, the connector 55 has a configuration in which the bottom surface side or the top surface side is open and the two connector pins 553 are erected toward the opening inside, but the present invention is not limited thereto. For example, the connector 55 may be formed in a shape in which the illumination emission direction side is opened, and a connector pin 553 may be erected from the opposite side to the illumination emission direction toward the opening. In such a configuration, the light source plug unit 471 of the light source installation unit 47 has a cylindrical plug formed toward the side surface of the projector 100, and the light source device 50 is slid from the side surface side of the projector 100 to light source installation unit. 47. Even in such a configuration, the life of the light source lamp 51 can be easily extended with a simple configuration just by rotating the light source device 50 as in the above embodiment.

  Further, the lamp case 54 may be configured such that the slit hole 543 is not formed. In this case, the outer case 110 of the projector 100 is formed such that the lamp removal opening 115 opens from the upper surface to the rear surface of the projector 100, and the exhaust opening 117 is formed on the side surface on the light source installation portion 47 side of the projector 100. The configuration is as follows. An exhaust fan or an intake fan is provided between the exhaust opening 117 and the end of the light source device 50 opposite to the illumination emission direction. By setting it as such a structure, the air in the light source device 50 can be exhausted, or cooling air can be introduce | transduced in the light source device 50, and a light source lamp can be cooled.

  In addition, although the configuration in which two pairs of light source mounting pieces are provided at 180 ° rotationally symmetric positions with respect to the illumination optical axis is shown, only one pair may be provided. In such a configuration, only one mounting portion 474 needs to be provided at a position corresponding to the light source mounting piece, and the configuration of the light source installation portion 47 can be simplified.

  Furthermore, in the above embodiment, the connector 55 of the light source device 50 has been shown with an example in which the connector pin 553 is erected toward the opening and is inserted into the cylindrical plug of the light source plug portion 471. Not. For example, a metal cylindrical member may be formed on the connector 55, and a metal pin member inserted into the cylindrical member may be formed on the light source plug portion 471. As described above, the shape and configuration of the connector and the light source plug portion are not limited as long as the light source plug portion 471 and the connector 55 are electrically connected and power is supplied to the light source lamp 51.

  Moreover, in the said embodiment, although the structure which arrange | positioned the connector 55 in 180 degree rotation symmetrical position with respect to the illumination optical axis was illustrated in the side surfaces 54C and 54D of the lamp case 54, it is not limited to this. For example, the connector 55 may be provided on the top surface 54A and the bottom surface 54B of the lamp case 54 at a 180-degree rotational symmetry position with respect to the illumination optical axis. In this case, a groove may be formed on the installation surface 472 of the light source installation portion 47 in accordance with the insertion position of the connector 55, and a power plug portion may be formed on the groove. With such a configuration, the connector provided on the top surface 54A or the bottom surface 54B can be inserted along the concave groove and connected to the power plug portion.

  Further, a connector is provided on the side surfaces 54C and 54D of the lamp case at a rotational symmetry position of 180 degrees with respect to the illumination optical axis, and a connector is provided on the top surface 54A and the bottom surface 54B at a rotational symmetry position of 180 degrees with respect to the illumination optical axis. It is good also as a structure currently provided. That is, it is good also as a structure by which the connector is each provided in the 90 degree rotation symmetrical position with respect to the illumination optical axis. In this case, it is preferable that the light source mounting piece is also provided at a 90-degree rotational symmetry position. In this configuration, when the irradiation time of the light source lamp reaches a predetermined cumulative time, the light source unit is installed in a state rotated by 90 degrees. By rotating the light source unit by 90 degrees in this way, the position where the crystallization of the arc tube 511 proceeds can be dispersed in four directions, so that the life of the light source lamp can be further extended. In addition to the example described above, for example, the connector may be provided at a 60-degree rotational symmetry position, or may be provided at a 120-degree rotational symmetry position.

  In addition, the specific structure and procedure for carrying out the present invention can be changed as appropriate to other structures and the like within the scope of achieving the object of the present invention.

  The present invention can be used for a projector.

It is a perspective view of a projector according to the present embodiment. It is the schematic which shows the inside of a projector typically. It is the schematic which shows the inside of an optical component housing | casing typically. It is a perspective view which shows a light source device. It is a top view which shows typically the arc tube of the light source lamp which comprises a light source device. It is a top view which shows the top | upper surface of a light source device. It is a side view of a light source device. It is the front view which looked at the light source device from the illumination emission direction side. It is a perspective view which shows typically the attachment position of the light source device of the housing | casing for optical components.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Projection lens, 45 ... Liquid crystal panel as a light modulation element, 50 ... Light source device, 51 ... Light source lamp, 54 ... Lamp case as a lamp housing, 55 ... Connector, 100 ... Projector, 511 ... Light emitting tube, 514 ... Electrode 544A, 544B, 544C, 544D ... Light source mounting piece as a fixed portion

Claims (9)

An arc tube in which discharge light is emitted between a pair of electrodes, a light source lamp having a reflector that emits a light beam emitted from the arc tube in a predetermined direction, and a lamp housing that houses the light source lamp inside A light source device,
A plurality of connectors provided on the lamp housing and capable of supplying electric power from the outside to the pair of electrodes,
The plurality of connectors are arranged at rotationally symmetric positions with a predetermined angle around the optical axis of a light beam emitted from the light source lamp. The light source device according to claim 1,
The lamp housing includes a plurality of fixing portions that fix the lamp housing at rotationally symmetric positions of the predetermined angle around the optical axis of the light beam emitted from the light source lamp. . The light source device according to claim 1 or 2,
The said predetermined angle is 180 degree | times. The light source device characterized by the above-mentioned. The light source device according to claim 1 or 2,
The said predetermined angle is 90 degree | times. The light source device characterized by the above-mentioned. The light source device according to any one of claims 1 to 4,
The plurality of connectors are each electrically connected to the pair of electrodes of the arc tube. The light source device according to any one of claims 1 to 5,
A light source device characterized in that identification means for identifying the plurality of connectors is provided. The light source device according to claim 6,
The light source device, wherein the identification unit is a seal attached to at least one of the plurality of connectors. A light source device according to any one of claims 1 to 7,
A light modulation element for modulating a light beam emitted from the light source device;
A projector comprising: a projection lens that magnifies and projects the modulated light beam. The projector according to claim 8, wherein
Time measuring means for recognizing the time when the arc tube of the light source device emits a light beam;
When the time measuring means recognizes that the accumulated time during which the arc tube emits a light beam has reached a predetermined time, a notification means for notifying information for rotating the light source device by a predetermined angle is provided. A projector characterized by that.

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