JP2008071498A - Light source device, method for manufacturing reflector used for light source device, and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reflector manufacturing method for preventing the occurrence of stress concentration or heat concentration while preventing cut ends from becoming sharp when a reflector as a light source device for a thin projector or a projector is partially cut off, to provide a light source device using the reflector, and to provide a projector using the light source. <P>SOLUTION: The reflector is manufactured as follows. Glass is pressed to form a shape having a bulged part 147 vertically protruding from a body part 146 and a lamp fixing part 135 protruding from the rear of the body part 146. A reflecting face is formed on the inner face of the casted shaped-article and the bulged part 147 is cut and removed. Consequently, an upper cut part 133 and a lower cut part 134, respectively having a planar cut face while having a rising face 148 from the reflecting face to the cut face, are formed. The projector 10 uses the light source device 63 having the reflector 65. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light source device for a projector, a method for manufacturing a reflector used in the light source device, and a projector that projects an image based on a video signal or the like provided with the light source device.

  2. Description of the Related Art Today, data projectors are widely used as image projection apparatuses that project a screen of a personal computer, a video image, an image based on image data stored in a memory card or the like onto a screen.

  This data projector incorporates a small high-intensity light source device such as a metal highland lamp or an ultra-high pressure mercury lamp, and condenses the light emitted from this light source on a micromirror display element called DMD or a liquid crystal plate. A color image is displayed on the screen.

  Such projectors have been downsized in recent years, and the light source device has been downsized in accordance with the downsizing of the projector housing, and many inventions have been proposed to efficiently use the light emitted from the light source device. Has been.

  For example, in Japanese Laid-Open Patent Publication No. 10-171362 (Cited Document 1), a louver is conventionally formed in an opening of a light source device to prevent light from leaking, but a lamp shade is provided instead of a louver. An invention in which light is blocked is proposed. In the present invention, the light shielding efficiency is improved as compared with the case where the light is shielded using a conventional louver, and the cooling air flow is improved, so that the cooling efficiency is improved.

In addition, it is desired to reduce the thickness of the projector along with the miniaturization of the projector. To reduce the thickness of the projector, the upper and lower sides of the outlet are made flat by cutting the upper and lower sides of the reflector of the light source device having a circular outlet. It has also been proposed to use a light source device using this reflector.
Japanese Patent Laid-Open No. 10-171362

  As described above, when cutting up and down in order to manufacture a thin reflector, the cut is sharp and stress is easily concentrated, and the heat is concentrated on the cut, so that deformation and seizure occur. There was a problem.

  The present invention has been made in view of the above-described problems of the prior art. When a part of a reflector is cut out as a thin projector or a light source device for a projector, the cut end is not sharp and stress concentration is achieved. Another object is to provide a reflector manufacturing method capable of preventing concentration of heat and heat, a light source device using the reflector, and a projector using the light source device.

  The manufacturing method of the reflector (65) of the present invention is such that when forming a reflector whose inner surface is a curved curved surface by processing glass, each outwardly bulging portion is located at an opposing position centered on the central axis of the reflector. (147) is formed, and both bulging portions (147) are cut and removed in a substantially parallel plane to form an upper cut portion (133) and a lower cut portion (134), and this upper cut portion ( 133) and the lower cut portion (134) may have a substantially vertical rising surface (148) continuous from the inner reflective surface to the cut surface at the periphery.

  The light source device (63) of the present invention has a substantially semi-elliptical rotating body in cross section, has an inner surface as a reflecting surface, has a front opening (131) in the front, and vertically cuts from the reflecting surface to the cut surface. A reflector (65) having a section (133) and a lower notch (134), a discharge lamp fixed to the reflector (65), an upper light shielding plate (137) covering the upper part of the upper notch (133), and a lower And a lower light shielding plate (138) covering the lower portion of the cut portion (134).

  Further, the upper cut portion (133) and the lower cut portion (134) of the light source device (63) have a substantially vertical rising surface (148) continuous from the reflective surface inside the reflector (65) to the cut surface. The cut surfaces of the upper cut portion (133) and the lower cut portion (134) are parallel surface shapes, and are cut into the elliptical shape with a part cut away from the front end of the reflector (65). It is rare.

  The projector (10) of the present invention includes a light source device (63), an optical system unit (77) including an optical system and a display element, and projector control means. The light source device (63) is described above. Such a thing is used.

  According to the present invention, when a part of a reflector is cut out as a thin projector or a light source device for a projector, a method of manufacturing a reflector that can prevent stress concentration and heat concentration without being sharp, and the reflector. A thin light source device using the light source and a thin projector using the light source device can be provided.

  The projector 10 according to the best mode for carrying out the present invention includes a light source device 63, an optical system unit 77 including an optical system and a display element, and projector control means.

  In the light source device 63 of the present invention, the inner surface has a curved rotating body shape such as a substantially semi-elliptical shape, and a reflection surface that reflects a light having a desired wavelength is formed on the inner surface. A reflector 65 having an upper cut portion 133 and a lower cut portion 134 from the reflection surface to the cut surface vertically, a discharge lamp fixed to the reflector 65, an upper light shielding plate 137 covering the upper portion of the upper cut portion 133, and a lower cut And a lower light shielding plate 138 that covers the lower portion of the portion 134.

  In addition, the cut surfaces of the upper cut portion 133 and the lower cut portion 134 are parallel surface shapes, and are cut into the elliptical shape with a part cut away from the front end of the reflector 65. The cut portion 134 has a substantially vertical rising surface 148 that continues from the reflective surface inside the reflector 65 to the cut surface.

  Further, the reflector 65 used in the light source device 63 includes a main body 146, a bulging portion 147 projecting up and down from the main body 146, a lens fixing plate 145 formed at the front end of the main body 146, and a main body. A soft glass is pressed into a shape with a lamp fixing part 135 protruding rearward of 146, a reflection filter is formed on the inner surface of the pressed modeled object to form a reflection surface, and the bulging part 147 is cut and removed. As a result, the cut surface has a flat shape, and the upper cut portion 133 and the lower cut portion 134 having the rising surface 148 are formed while the end portion is thick from the reflection surface to the cut surface.

  The main body 146 of the reflector 65 is a semi-ellipsoidal rotating body, and has a circular front opening 131 at the front end, a circular rear opening 150 at the rear end, and edges up and down. The bulging portion 147 includes a bulging wall 151 having a rising surface 148 formed substantially perpendicularly from the reflection surface side periphery of the elliptical opening, and the bulging portion. And a horizontal bulging plate 149 that covers the front end of the wall 151, and the lamp fixing portion 135 has a cylindrical shape having the same central axis as the rotation axis of the main body portion 146 and connects the front end to the periphery of the rear opening 150. The shaped product is pressed into the shape thus formed, and the bulging portion 147 is cut and removed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a projector according to an embodiment of the present invention has a substantially rectangular parallelepiped shape, and includes a lens cover 19 that covers a projection port on a side of a front plate 12 that is a front side plate of a main body case. The front plate 12 is provided with a plurality of exhaust holes 17. Further, although not shown, an Ir receiver for receiving a control signal from the remote controller is provided.

  The top plate 11 as a main body case is provided with a key / indicator section 37. The key / indicator section 37 includes a power switch key, a power indicator for notifying power on / off, and a lamp of the light source device. A key or indicator such as a lamp switch key for turning on the lamp, a lamp indicator for displaying the lighting of the lamp, an overheating indicator for notifying when the light source device or the like overheats is provided.

  Further, on the back surface of the main body case, there are provided various terminals 20 such as an input / output connector portion and a power adapter plug for providing a USB terminal, a D-SUB terminal for inputting image signals, an S terminal, an RCA terminal and the like on the back plate. Is.

  A plurality of air intake holes 18 are provided in the vicinity of the lower portion of the right side plate 14 which is a side plate of the main body case (not shown) and the left side plate 15 which is the side plate shown in FIG.

  As shown in FIG. 2, the projector control means of the projector 10 includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like. The image signals of various standards input from the connector unit 21 are converted so as to be unified into an image signal of a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). Thereafter, it is sent to the display encoder 24.

  The display encoder 24 develops and stores the transmitted image signal in the video RAM 25, generates a video signal from the stored contents of the video RAM 25, and outputs the video signal to the display drive unit 26.

  A display drive unit 26 to which a video signal is input from the display encoder 24 drives a display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal sent. Yes, the light from the light source device 63 is incident on the display element 51 through the light source side optical system to form an optical image with the reflected light of the display element 51, and through the projection system lens group serving as the projection side optical system. An image is projected and displayed on a screen (not shown), and the movable lens group 97 of the projection system lens group is driven by a lens motor 45 for zoom adjustment and focus adjustment.

  In addition, the image compression / decompression unit 31 performs a recording process for sequentially writing a luminance signal and a color difference signal of an image signal to a memory card 32 that is a removable recording medium by performing data compression by processing such as ADTC and Huffman coding. In the mode, the image data recorded on the memory card 32 is read out, and individual image data constituting a series of moving images is decompressed in units of one frame and sent to the display encoder 24 via the image conversion unit 23. A moving image or the like can be displayed based on the stored image data.

  The control unit 38 controls the operation of each circuit in the projector 10, and includes a ROM that stores operation programs such as a CPU and various settings fixedly, and a RAM that is used as a work memory. ing.

  Further, the operation signal of the key / indicator unit 37 composed of the main key and the indicator provided on the upper surface plate 11 of the main body case is directly sent to the control unit 38, and the key operation signal from the remote controller is received by Ir. The code signal received by the unit 35 and demodulated by the Ir processing unit 36 is sent to the control unit 38.

  An audio processing unit 47 is connected to the control unit 38 via a system bus (SB). The audio processing unit 47 includes a sound source circuit such as a PCM sound source, and converts the audio data into analog data in the projection mode and the playback mode. The speaker 48 can be driven to emit loud sounds.

  The control unit 38 controls the power supply control circuit 41. When the lamp switch key is operated, the power supply control circuit 41 turns on the discharge lamp of the light source device, and the cooling fan drive control circuit 43 The temperature is detected by a plurality of temperature sensors provided in the light source device, etc., and the rotation speed of the cooling fan is controlled, and the rotation of the cooling fan is continued even after the light source device lamp is turned off by a timer or the like. Further, depending on the result of temperature detection by the temperature sensor, control such as stopping the light source device and turning off the power of the projector main body is also performed.

  These ROM, RAM, IC and circuit elements are attached to the control circuit board 103 as the main control board shown in FIG. 3, and the power system power supply control circuit 41 is incorporated in the lamp power supply circuit block 101 for control. A control circuit board 103 as a main control board of the system and a power control circuit board 102 to which the lamp power circuit block 101 of the power system is attached are formed separately.

  The projector 10 has an internal structure in which the control circuit board 103 is disposed in the vicinity of the blower 110, the power control circuit board 102 to which the lamp power circuit block 101 and the like are attached is disposed in the vicinity of the right side plate 14, and the interior of the housing is The partition wall 120 forms an air-side space chamber 121 on the back plate 13 side and an air-side space chamber 122 on the front plate 12 side in an airtight manner, and a sirocco fan type blower 110 is used as a cooling fan in the air-side space chamber 121. It is arranged on the bottom plate in the vicinity of the face plate 13, and the discharge port 113 of the blower 110 is arranged in the exhaust side space chamber 122.

  Further, as shown in FIG. 4, a light source device 63 is disposed in the exhaust side space 122, an optical system unit 77 is disposed along the left side plate 15, an illumination side block 78, an image generation block 79, a projection The illumination side block 78 of the optical system unit 77 configured with the side block 80 is in open communication with the exhaust side space chamber 122 so that a part of the optical system unit 77 is located in the exhaust side space chamber 122, and the exhaust side An exhaust temperature reducing device 114 is disposed along the front plate 12 of the space chamber 122.

  Further, the bottom plate 16 of the projector 10 has an opening into which the light source device 63 can be inserted. The light source device 63 is inserted into the exhaust side space chamber 122 through this opening and is fixed from the bottom by a lamp cover. ing. That is, the light source device 63 can be replaced from the opening of the bottom plate 16.

  As shown in FIG. 5, the optical system unit 77 includes three blocks: an illumination side block 78 located in the vicinity of the light source device 63, an image generation block 79, and a projection side block 80. The illumination side block 78 is provided with a first reflection mirror 72 that reflects light emitted from the light source device 63 to the color wheel 71 and color filters for red light, green light, and blue light around the wheel block 73. A color wheel 71 that is rotated and a light tunnel 75 that converts the light transmitted through the filter of the color wheel 71 into a light beam having a uniform intensity distribution are provided. In addition, as shown in FIG. 4, an illumination-side block partition wall 127 connected to the partition partition wall 120 so as to penetrate the light tunnel 75 is provided.

  The image generation block 79 includes a second reflection mirror 74 that changes the direction of light emitted from the light tunnel 75, and a plurality of lenses that condenses the light reflected by the second reflection mirror 74 on the display element 51. A light source side lens group 83 formed in step (1), an irradiation mirror 84 for irradiating the light transmitted through the light source side lens group 83 to the display element 51 at a predetermined angle, and the DMD (digital micromirror) serving as the display element 51 A device), a display element unit for holding the display element 51, and the like. A display element cooling device 53 for cooling the display element 51 is disposed on the back plate 13 side of the display element 51.

  Further, the projection side block 80 has a lens group of the projection side optical system 62 that emits light that is reflected by the display element 51 and forms an image to the screen. The projection side optical system 62 includes a fixed lens barrel. The lens is composed of a fixed lens group 93 built in the lens and a movable lens group 97 built in the movable lens barrel, and is a variable focus type lens having a zoom function. The lens is moved by moving the movable lens group 97 by a lens motor. Adjustment and focus adjustment are possible.

  In addition, an optical system control board 86 for controlling zoom and focus adjustment of the projection side optical system is disposed between the optical system unit 77 and the left side plate 15. By controlling the operation of the movable lens group 97, a zoom function and focus adjustment can be performed.

  Further, the illumination side block 78 and the projection side block 80 are arranged adjacent to each other so as to form a gap 128 serving as a cooling air flow path between both blocks, and a part of each block has an outer wall. It has. The image generation block 79 connects the illumination side block 78 and the projection side block 80, and the optical system unit 77 has the optical axis of the illumination side block 78 and the optical axis of the projection side block 80 parallel to each other as a whole. It has a shape of the shape. Further, the outer wall of the illumination-side block 78 that is at a high temperature of the optical system unit 77 is formed using a heat insulating member having a low thermal conductivity such as a resin in order to reduce heat conduction.

In some cases, the outer wall of the illumination side block 78 is formed using a metal that is light in weight and high in heat conduction, such as aluminum, and the heat of the illumination side block 78 is radiated to the outside.
Further, the illumination-side block partition wall 127 of the illumination-side block 78 has a cutout 129 serving as an air flow path in the upper part near the light tunnel 75.

  As shown in FIG. 6, the light source device 63 includes a reflector 65 having an inner surface as a reflection surface and a front opening 131 in the front, and a discharge lamp using halogen or the like built in the reflector 65. A lens fixing member 144 having an opening through which cooling air can flow is disposed inside the reflector 65 at the front end of the front opening 131 of the reflector 65. The light source lens 132 is disposed on the lens fixing member 144. Is fixed.

  Further, as shown in FIG. 7A, this reflector 65 has a substantially semi-elliptical cross section and an inner surface as a reflecting surface, and a rectangular lens fixing plate for attaching a lens fixing member 144 or the like to the front end. 7B, as shown in FIG. 7 (b), the upper and lower cut portions 133 and 134 have a rising surface 148 that has a cutting surface parallel to the upper and lower sides and a continuous rising surface 148 from the reflecting surface to the cutting surface. Shape.

  Further, a lamp fixing portion 135 for fixing the discharge lamp is provided at the rear end portion of the reflector 65, and a gap serving as an air flow path for cooling is formed on the periphery of the lamp fixing portion 135. FIG. As shown, a lead wire 143 for supplying power is connected to the rear end of the discharge lamp. The lead wire 143 is connected to a connector 136 that is connected to the power supply unit of the projector 10.

  As shown in FIG. 8, the reflector 65 includes a main body portion 146, a bulging portion 147 that bulges outward at the upper and lower positions that are opposed positions around the central axis of the main body portion 146, and the main body portion 146. The heat-softened glass is pressed with a mold into a shape having a lens fixing plate 145 formed on the periphery of the front end portion of the lens and a lamp fixing portion 135 protruding at the rear end portion of the main body portion 146. It is to be molded.

  Further, a reflective filter that reflects light of a necessary visible light wavelength by using vacuum deposition, physical vapor deposition, plasma diffusion chemical vapor deposition, or the like, and transmits unnecessary wavelength light on the inner surface of the pressed shaped article. By forming the reflection surface and cutting the bulging portion 147 in a plane substantially parallel to the central axis of the reflector, the upper cut portion having a rising surface 148 from the reflection surface to the cut surface is cut in a plane shape 133 and the lower notch part 134 are formed, and it is manufactured thickly leaving the thickness at the reflector end around the notch part.

  The main body 146 of the reflector 65 has a rotational curved surface shape obtained by rotating a curved surface such as a semi-elliptical surface on the inner surface, a circular front opening 131 at the front end, and a circular rear surface at the rear end. It has an opening 150 and an elliptical opening with a semi-elliptical edge at the top and bottom, and the bulging portion 147 has a rising surface 148 formed substantially perpendicularly from the reflection surface side periphery of the elliptical opening as an inner surface The bulging wall 151 and a horizontal bulging plate 149 that covers the tip of the bulging wall 151 are provided, and the lamp fixing portion 135 has a cylindrical shape in which the central axis is the same as the rotation axis of the main body 146, and the front end portion. The shaped object is pressed into a shape connected to the periphery of the rear opening 150.

  The upper and lower notches 133 and 134 cut and remove the bulging wall 151 having the rising surface 148 continuous with the reflecting surface as an inner surface, so that the rising surface 148 remains on the reflector 65 from the reflecting surface to the cutting surface. Thus, the edge of the cut surface is not sharpened as in the prior art, and heat concentration and breakage can be prevented.

As shown in FIG. 6, an upper light shielding plate 137 and a lower light shielding plate 138 for blocking light and heat leakage are fixed to the upper cut portion 133 and the lower cut portion 134 of the reflector 65. This upper light shielding plate 137 covers from the opening on the upper surface side of the lens fixing member 144 to the upper cut portion 133 of the reflector 65, and includes an explosion-proof filter fixing portion 140 for locking an explosion-proof filter 139 described later, Light from the discharge lamp is blocked.
Further, the lower light shielding plate 138 blocks the lens fixing member 144 from the bottom surface side to the lower cut portion 134 and extends further rearward to shield light from the discharge lamp.

  The upper and lower light shielding plates 137 and 138 are extremely hot because they are directly irradiated with light from the discharge lamp. For this reason, there is a problem that the metal plates are deformed when a metal having poor thermal conductivity is used. Therefore, in this embodiment, the deformation is prevented by forming using a metal having a good thermal conductivity such as an aluminum material or copper.

  Further, a mesh-shaped protective plate 142 is disposed between the lower light shielding plate 138 and the reflector 65, and this protective plate 142 is formed using a rigid body such as iron in order to fix the explosion-proof filter 139 and the like. ing. Further, the protective plate 142 can prevent direct contact with the reflector 65 that becomes high temperature when the light source device 63 is replaced.

  Further, in the vicinity of the opening of the lens fixing member 144 and the vicinity of the gap formed at the periphery of the lamp fixing portion 135, a mesh-like shape for preventing glass or the like from jumping to the outside when the discharge lamp explodes. An explosion proof filter 139 is arranged. The explosion-proof filter 139 is engaged with the explosion-proof filter fixing portion 140 and the protection plate 142 of the upper light shielding plate 137.

  In addition, the discharge lamp includes a spherical light-emitting part, and a first sealing part and a second sealing part, which are two sealing parts mounted coaxially through the center of the light-emitting part at symmetrical positions on the outer surface of the light-emitting part. It has a sealing part, and has a lamp base that serves as an electrode at the end of the first sealing part. A lead wire 143 is attached to the end of the second sealing part, and the lamp is connected via a connector 136. Connected to the power circuit.

  As shown in FIG. 3, the blower 110 as a cooling fan for cooling the light source device 63 has a suction port 111 in the center, and the discharge port 113 has a substantially square cross section. 120 and an illumination side block partition wall 127, and exhaust air from the blower 110 is exhausted to an exhaust side space 122 partitioned by the partition partition wall 120 and the illumination side block partition wall 127. A control circuit board 103 is disposed in the vicinity of the suction port 111.

  As shown in FIGS. 3 to 5, the partition wall 120 includes an intake-side space chamber 121 in which relatively low temperature devices such as various optical systems and various substrates are arranged, and a light source device 63. The apparatus is partitioned into a high-temperature device and an exhaust-side space chamber 122 in which a light source unit such as a first reflection mirror 72 and a color wheel 71 disposed near the light source device 63 is disposed.

  The partition wall 120 is composed of a plate-like first partition wall 123 and a second partition wall 124, and an upper partition plate 126 covers the upper part of the exhaust side space chamber 122 in an airtight manner.

  The first partition wall 123 is a partition wall for guiding a part of the exhaust air from the discharge port 113 of the blower 110 to the illumination side block 78 that is disposed in the vicinity of the light source device 63 of the optical system unit 77 and becomes high temperature. In addition, an oblique length is provided obliquely from the discharge port 113 of the blower 110 toward the back plate 15, and is connected to the end of the illumination side block partition wall 127 in the optical system unit 77. Although not shown, the first partition wall 123 is formed with a vent or a slit so that the exhaust air from the discharge port 113 of the blower 110 directly hits the color wheel 71.

  The second partition wall 124 is a partition wall for creating a space between the front plate 12 and circuits such as the lamp power supply circuit block 101 and the like, and rightward from the discharge port 113 of the blower 110 toward the front plate 12. An oblique length of an arbitrary length is provided, extending from this end to the right side plate 14 in parallel with the front plate 12 to the vicinity of the right side plate 14, and finally from this end to the right side plate 14 in parallel. 12 is a substantially bowl-shaped shape connected to 12. The shape of the second partition 124 is for dispersing the hot exhaust gas in the exhaust-side space chamber 121 over the entire front plate 12.

  The upper partition plate 126 covers the entire upper portion of the exhaust-side space chamber 122, is formed in substantially the same shape as the upper portion of the exhaust-side space chamber 122, and is disposed between the upper surface plate of the projector housing. It is arranged with a space.

  The first partition wall 123 and the second partition wall 124 are made of a heat insulating member such as a resin similarly to the optical system unit 77. Accordingly, it is possible to prevent high heat generated by the light source device 63 in the exhaust side space chamber 122 from leaking to the intake side space chamber 121.

  Further, as shown in FIG. 4, an exhaust temperature reducing device 114 for reducing the exhaust temperature in the exhaust side space chamber 122 and releasing it to the outside is provided near the front plate in the exhaust side space chamber 122. The exhaust temperature reducing device 114 is a heat conductive member. In this embodiment, the exhaust temperature reducing device 114 is a heat conductive member having a capillary structure on the inner wall and a metal pipe having a vacuum inside sealed with a working fluid such as pure water or perfluorocarbon. These heat pipes and a plurality of fins are used, and are arranged in the vicinity of the front plate 12 in parallel with the front plate 12.

The exhaust temperature reduction device 114 has a shape in which a plurality of fins that are plate-like bodies are arranged in parallel, and a plurality of fins are connected through a long rod-like heat conduction member passing through substantially the center of the fin. That is, the heat conducting member is in a plate shape and is in contact with the plate surface of the plurality of fins.
By attaching the fins to the heat conducting member in this manner, the heat absorbed by the fins can be released to the heat conducting member, and the entire exhaust temperature reducing device can be kept at a uniform temperature.

  Next, the flow of air in the projector 10 will be described. As shown in FIG. 4, the back plate 13 is provided with an intake hole 18 in a rear portion of the place where the display element 51 is located, and an air flow path between the back plate 13 and the optical system unit 77 having the display element 51. The outside air sucked from the intake holes 18 provided in the back plate 13 and the intake holes 18 provided behind the left side plate 15 is caused to flow along the back plate 13 in the direction of the blower 110.

  The control circuit board 103 serves as two control boards, and the air flowing along the control circuit board 103 is located between the two control circuit boards 103 or above or below the two control circuit boards 103. The air is sucked into the air inlet 111.

  Therefore, when the fan of the blower 110 is rotated, the blower 110 serving as a cooling fan sucks the surrounding air from the suction port 111 and sucks the air around the blower 110 inside the projector 10, so that the side plate of the housing of the projector 10 The outside air can be sucked into the projector 10 through a large number of intake holes 18 provided in the projector 10.

  A part of the outside air sucked from the suction holes 18 provided in the left side plate 15 and the back plate 13 forms an air flow path between the back plate 13 and the optical system unit 77 so as to cool the display element cooling device 53. The air flows along the control circuit board 103 and is sucked into the suction port 111 of the blower 110 through the upper and lower surfaces of the control circuit board 103 and the space between the control circuit boards 103. Further, other outside air sucked from the suction hole 18 of the left side plate 15 cools the optical system unit 77.

  In addition, the air flow in the vicinity of the optical system unit 77 is such that a part of the air sucked from the intake hole 18 of the left side plate 15 flows through the space between the optical system unit 77 and the bottom plate 16 and the illumination side block. It flows into the gap 128 between the projection side block 78 and the projection side block 80, and prevents the high temperature heat of the illumination side block 78 from being transmitted to the projection side block 80. The air flowing into the gap 128 flows into the intake side space chamber 121 in the housing through the cutout 129, and further sucked into the suction port 111 of the blower 110 and exhausted into the exhaust side space chamber 122.

  The outside air sucked into the projector 10 from the intake hole 18 of the right side plate 14 partially reaches the control circuit board 103 while cooling the power supply control circuit board 102 through the periphery of the lamp power supply circuit block 101 and the like. The air flows along the control circuit board 103 and is sucked into the suction port 111 of the blower 110. The remaining sucked outside air flows along the first partition wall 121 and is sucked into the suction port 111 of the blower 110.

  A part of the exhaust from the blower 110 blown into the exhaust side space 122 flows along the color wheel 71, and most of the exhaust flows around the light source device 63 that has become hot. A part of the air flowing around the light source device 63 flows from the opening provided in the reflector 65 through the reflector 65 to the periphery of the discharge lamp, and from the gap of the lens fixing member 144 to the inside of the reflector 65. The other part flows in the vicinity of the first reflecting mirror 72, the color wheel 71, etc., and cools each part of the light source unit together with the light source device 63.

  In this way, the high-temperature air after the light source device 63 and the color wheel 71 are cooled in the exhaust-side space chamber 122 flows into the exhaust temperature reducing device 114, and is cooled and exhaust holes 17 provided in the front plate 12. Is more discharged.

  According to the present embodiment, since the top and bottom of the reflector are planar, the light source device is thin, and the projector can be thinned. Further, since the peripheral edges of the upper and lower cut portions of the reflector are formed thick, stress concentration and heat concentration on the cut portion are reduced, and damage to the reflector can be prevented.

  Furthermore, in order to manufacture a reflector by cutting the bulge part of this shaped article by pressing so as to form a bulge part at a position to be the upper and lower cut parts of the reflector, only the cut part is separately provided when the reflector is manufactured. It is no longer necessary to form a thick wall and can be easily manufactured.

  The same effect can be obtained by cutting the upper and lower portions of the main body, which is a rotating body having a substantially semi-elliptical cross section, at the time of manufacturing the reflector, and eliminating the sharp place by polishing the periphery of the cut portion with a file or the like. Obtainable.

  In this case, when polishing so as to form a rising surface perpendicular to the horizontal cut surface, or when polishing so as to form a surface extending in the radial direction from the central axis of the reflector, it smoothly curves from the reflecting surface to the cutting plane. In some cases, the curved surface shape is used.

  The present invention is not limited to the above-described embodiments, and can be freely changed and improved without departing from the gist of the invention.

1 is a perspective view showing an external appearance of a projector according to an embodiment of the invention. FIG. 3 is a diagram illustrating a functional circuit block of the projector according to the embodiment of the invention. FIG. 3 is a top view of the projector according to the embodiment of the present invention with the top plate removed. FIG. 3 is a top view showing the inside of an exhaust side space chamber of the projector according to the embodiment of the invention. FIG. 2 is a top view of the projector according to the embodiment of the present invention with a part cut away. The perspective view of the light source device which concerns on the Example of this invention. The perspective view and front view of the reflector which concern on the Example of this invention. The perspective view and front view of the molded article at the time of reflector manufacture which concern on the Example of this invention.

Explanation of symbols

10 Projector
11 Top plate 12 Front plate
13 Back plate 14 Right plate
15 Left side plate 16 Bottom plate
17 Exhaust hole 18 Intake hole
19 Lens cover 20 Various terminals
21 I / O connector 22 I / O interface
23 Image converter 24 Display encoder
25 Video RAM 26 Display driver
31 Image compression / decompression unit 32 Memory card
35 Ir receiver 36 Ir processor
37 Key / Indicator section 38 Control section
41 Power supply control circuit 43 Cooling fan drive control circuit
45 Lens motor 47 Audio processor
48 Speaker 51 Display element
53 Display element cooling device 62 Projection side optical system
63 Light source device
65 Reflector 71 Color wheel
72 First reflection mirror 73 Wheel motor
74 Second reflection mirror 75 Light tunnel
77 Optical system unit 78 Illumination side block
79 Image generation block 80 Projection side block
83 Light source side lens group 84 Irradiation mirror
86 Optical system control board 93 Fixed lens group
97 Movable lens group 101 Lamp power circuit block
102 Power supply control circuit board 103 Control circuit board
110 Blower 111 Air inlet
113 Discharge port 114 Exhaust temperature reduction device
120 Partition wall 121 Inlet side space
122 Exhaust side space 123 First partition
124 2nd partition wall 126 Upper partition plate
127 Lighting block block 128 Gap
129 Cutout 131 Front opening
132 Light source lens 133 Top notch
134 Lower notch 135 Lamp fixing part
136 Connector 137 Upper shading plate
138 Lower shading plate 139 Explosion-proof filter
140 Explosion-proof filter fixing part 142 Protection plate
143 Lead wire 144 Lens fixing member
145 Lens fixing plate 146 Body
147 Bump 148 Rising surface
149 Swelling plate 150 Rear opening
151 bulge wall

Claims (8)

When forming a reflector whose inner surface is a curved curved surface shape by processing glass, each outwardly bulging portion is formed at an opposing position around the central axis of the reflector,
A method of manufacturing a reflector, wherein the upper cut portion and the lower cut portion are formed by cutting and removing the bulged portions along a substantially parallel plane.   The method for manufacturing a reflector according to claim 1, wherein the upper cut portion and the lower cut portion have a substantially vertical rising surface that continues from the inner reflective surface to the cut surface at the periphery. A reflector having a substantially semi-elliptical rotary section, an inner surface as a reflecting surface, a front opening at the front, and an upper cut portion and a lower cut portion from the reflective surface to the cut surface in the vertical direction;
A discharge lamp fixed to the reflector;
An upper light shielding plate covering the upper part of the upper cut portion;
A light source device comprising: a lower light shielding plate that covers a lower portion of the lower cut portion.   4. The light source device according to claim 3, wherein the upper cut portion and the lower cut portion have a substantially vertical rising surface that is continuous with a cut surface from a reflection surface inside the reflector.   The cut surface of the upper cut portion and the lower cut portion has a parallel surface shape, and is cut backward from the front end of the reflector into an elliptical shape with a part cut away. 5. The light source device according to 4. A light source device;
An optical system unit including an optical system, a display element, and the like;
Projector control means,
The light source device is
A reflector having a substantially semi-elliptical rotary section, a reflecting surface on the inner surface, a front opening at the front, a lamp fixing portion at the rear, and an upper cut portion and a lower cut portion from the reflective surface to the cut surface up and down ,
A discharge lamp fixed to the reflector;
An upper light shielding plate covering the upper part of the upper cut portion;
A projector comprising: a lower light shielding plate that covers a lower portion of the lower cut portion.   The projector according to claim 6, wherein the upper cut portion and the lower cut portion have a substantially vertical rising surface that is continuous with the cut surface from the reflection surface inside the reflector.   The cut surface of the upper cut portion and the lower cut portion is a parallel surface shape, and is cut backward from the front end of the reflector into an elliptical shape with a part cut away. The projector according to 7.

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