JP2019040110A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of preventing or reducing damage to an optical unit, a circuit board, or the like against an impact caused by dropping or the like, and realizing compactification. SOLUTION: A projector 1 faces a housing having a first surface 411a and a second surface 422a facing each other, an optical unit 3 having an optical component arranged inside the housing, and a first surface 411a. An optical first frame 21 arranged and fixed to the optical unit 3 and a resin second frame 22 arranged facing the second surface 422a and fixed to the first frame 21 are provided. The unit 3 is located between the first frame 21 and the second frame 22. [Selection diagram] FIG. 5

Description

  The present invention relates to a projector.

  Conventionally, a projector that projects an image may be used fixed to a ceiling or a wall surface. In Patent Document 1, a mounting unit mounted on a duct for a lighting fixture such as a spotlight, a projection unit main body having a projection unit for projecting an image and supported by the mounting unit, and a direction of the projection unit main body with respect to the duct And a support mechanism capable of changing either one of the positions, it is disclosed to easily adjust the projection direction of the image. Further, in Patent Document 2, the optical engine unit and the control unit are arranged one above the other so that the housing for housing the optical engine unit and the control unit has a substantially rectangular parallelepiped shape, thereby reducing the size of the projector body. Is disclosed.

JP2015-22148A JP2013-83735A

When the projector of Patent Document 1 is put to practical use, countermeasures against impacts on the projector (particularly countermeasures against dropping) become an important issue. Specifically, since it is assumed that the projector body may be accidentally dropped when the user installs or adjusts the position of the projector, damage to the projector (especially the optical unit or circuit board) from the impact caused by the drop. Preventing and reducing breakage are issues. It should be noted that the conventional invention for reducing the size of a projector represented by Patent Document 2 does not disclose any solution to such a problem.
Accordingly, there has been a demand for a projector that can prevent or reduce the damage of the optical unit, the circuit board, and the like against an impact caused by dropping or the like, and realize a compact size.

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

  Application Example 1 A projector according to this application example is opposite to the first surface, with an optical unit having a housing having a first surface and a second surface facing each other, and an optical component disposed inside the housing. A metal first frame for fixing the optical unit, and a resin second frame arranged opposite to the second surface and fixed to the first frame, the optical unit comprising: It is located between the first frame and the second frame.

According to the projector of this application example, the optical unit includes a housing having a first surface and a second surface facing each other, and an optical component disposed inside the housing. Since the optical unit is positioned between the first frame and the second frame, the optical unit is surrounded by the two frames, so that the optical unit can be prevented from being damaged or reduced in response to an external impact. Can be achieved. Further, since the second frame is made of resin, the projector can be reduced in weight. Further, since the first frame for fixing the optical unit is made of metal, the strength and reliability of holding the optical unit is improved by improving the robustness of the first frame.
Further, since the second frame is made of resin and is fixed to the first frame with flexibility, for example, when an impact is applied to the second frame, the impact is absorbed and transmitted to the first frame. The For this reason, it is difficult to transmit a direct impact to the optical unit fixed to the first frame, so that it is possible to prevent or reduce the damage of the optical unit.

  Application Example 2 In the projector according to the application example described above, the optical component is at least one of a light source, a light modulation device that modulates light emitted from the light source, and a projection optical device that projects light modulated by the light modulation device. It is preferable to contain.

  According to the projector according to this application example, when the optical unit includes at least one of a light source, a light modulation device, and a projection optical device, the optical component stored in the optical unit prevents damage to the optical component stored in response to an external impact. And damage can be reduced.

  Application Example 3 In the projector according to the application example, the projector includes a support unit fixed to the first frame, and the support unit is positioned in a direction opposite to the gravitational direction with respect to the second frame. It is preferable to suspend the first frame.

  According to the projector of this application example, the first frame for fixing the optical unit is suspended by the support portion so as to be positioned in the direction opposite to the direction of gravity with respect to the second frame, so that the second frame made of resin Is positioned in the direction of gravity with respect to the first frame. For example, when the projector falls in this state, the probability that the second frame first receives a drop impact from the floor surface or the like increases. However, since the second frame is made of resin, the drop impact is absorbed by the flexibility of the resin. In addition, since the optical unit is fixed to the first frame and is not fixed to the second frame, the drop impact received by the second frame is mitigated without being directly transmitted to the optical unit. Communicated in Therefore, it is possible to prevent or reduce the damage of the optical unit against an impact caused by dropping.

  Application Example 4 The projector according to the application example described above includes a control circuit board on which a control circuit including a control unit that controls the light source and the light modulation device is mounted. The control circuit board includes a first frame and an optical unit. It is preferable to arrange between them.

  According to the projector of this application example, the control circuit board on which the control circuit including the control unit that controls the light source and the light modulation device is mounted is disposed between the first frame and the optical unit, so that the first frame The control circuit board can be housed between the optical unit and the optical unit, and the projector can be made compact. Further, it is possible to prevent or reduce the damage of the control circuit board due to the impact.

  Application Example 5 In the projector according to the application example, a first drive circuit that drives a light source based on a control signal output from the control unit, and a first drive circuit board on which the first drive circuit is mounted. The first drive circuit board is preferably disposed between the optical unit and the control circuit board.

  According to the projector of the present application example, the first drive circuit board on which the first drive circuit is mounted is disposed between the optical unit and the control circuit board, so that the control circuit board and the optical device are arranged inside the first frame. The first drive circuit board can be accommodated between the units. Accordingly, the connection distance between the optical unit and the first drive circuit board can be shortened, and the projector can be made compact. Further, it is possible to prevent or reduce the damage of the first drive circuit board due to the impact.

  Application Example 6 In the projector according to the application example described above, a second drive circuit that drives the light modulation device based on a control signal output from the control unit, and a second drive circuit board on which the second drive circuit is mounted; The second drive circuit board is preferably disposed between the optical unit and the second frame.

  According to the projector of this application example, the second drive circuit board on which the second drive circuit is mounted is disposed between the optical unit and the second frame, so that the second drive circuit board is disposed between the optical unit and the inside of the second frame. The second drive circuit board can be accommodated in Thereby, the connection distance between the optical unit and the second drive circuit board can be shortened, and the projector can be made compact. Further, it is possible to prevent or reduce the damage of the second drive circuit board due to the impact.

  Application Example 7 In the projector according to the application example described above, it is preferable that the optical unit, the first frame, and the second frame are accommodated inside and an exterior case having a cylindrical shape is provided.

  According to the projector of this application example, by housing the optical unit, the first frame, and the second frame inside the cylindrical outer case, for example, when an impact is applied to the outer case due to dropping or the like, It is possible to prevent or reduce the damage of the optical unit, the circuit board, and the like against the impact, and it is possible to realize a compact projector having a cylindrical shape.

1 is an external perspective view of a projector according to an embodiment. The external appearance perspective view which shows a projector main body. The perspective view which shows the inside of a projector main body. The perspective view which shows the inside of a projector main body. The disassembled perspective view of a projector main body. The disassembled perspective view of a projector main body. FIG. 3 is a schematic diagram showing a configuration of an optical system. The functional block diagram of a projector. The disassembled perspective view of a projector main body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The projector 1 of the present embodiment is a device that modulates light emitted from a light source according to image information and enlarges and projects the modulated light.

  FIG. 1 is an external perspective view of a projector 1 according to the present embodiment. FIG. 2 is an external perspective view showing the projector main body 1A. In FIG. 1, a duct 500 to which the projector 1 is attached is also illustrated. FIG. 2 is a perspective view seen from the upper left side in the rear direction, and also shows a support member 1C1 constituting the support portion 1C.

  As shown in FIGS. 1 and 2, the projector 1 according to the present embodiment includes a projector main body 1A that projects an image, a power supply unit 1B, and a support unit 1C that supports the projector main body 1A and connects to the power supply unit 1B. Yes. The power supply unit 1B includes a power supply circuit that supplies power to the projector main body 1A.

  The projector 1 according to the present embodiment is installed in a duct 500 or the like in which the power supply unit 1B is disposed on a ceiling or the like. The projector 1 can project the image in a desired direction by rotating the projector main body 1A by rotating with respect to the power supply unit 1B in a state where the support unit 1C suspends the projector main body 1A. . When rotating, one end portion of the support member 1C1 constituting the support portion 1C is fixed to the projector main body 1A, and rotates around a spherical rotation portion 1C11 serving as the other end portion.

  The duct 500 is a saddle-shaped power supply body called a lighting duct, and has a pair of conductors (electrodes) extending along the longitudinal direction, and electricity flows through these conductors. With this configuration, the duct 500 supplies power to the installed power supply unit 1B.

  Hereinafter, for convenience of explanation, the direction is defined with respect to the projector main body 1A on the basis of a posture in which a central axis of a cylindrical main case 80 described later is parallel to the ceiling surface. Specifically, the direction in which the projection optical device 36 emits light is the front side or the front direction (+ Y direction), and the opposite direction is the rear side or the rear direction (−Y direction). Further, the support unit 1C side of the projector main body 1A is set to the upper side or the upper direction (+ Z direction), and the opposite direction is set to the lower side or the lower direction (−Z direction). Further, the right side of the projector main body 1A viewed from the front in the posture in which the support portion 1C is in the upward direction is the right direction (+ X direction), and the opposite direction is the left direction (−X direction). The direction is defined as described above and used as appropriate in the following description.

The external appearance of the projector body 1A will be described with reference to FIGS.
The projector main body 1A of the present embodiment has a substantially cylindrical shape, and the components are accommodated therein. The projector main body 1A is covered with an outer case 8. As will be described in detail later, the exterior case 8 has a main case 80 that is formed in a substantially cylindrical shape that extends in the Y direction and has front and rear openings, and a disk-shaped first cover that covers the front opening of the main case 80. 1 a front case 81 (second front case 82), a disc-shaped rear case 83 that covers the opening on the rear side of the main case 80, and a sub case 84 that forms the upper rear side of the main case 80. It is generally composed of

  Further, the sub case 84 is formed with a hole portion 843 through which a power cable (not shown) extending from the power source portion 1B is inserted into the projector main body 1A. The first front case 81 is provided with a projection opening 812 through which light emitted from the projection optical device 36 passes and an intake port 813. The rear case 83 is formed with an opening 833 for exposing various terminals connected to an external device or the like and an exhaust port 834 on the upper side. In this embodiment, an operation instruction to the projector 1 is performed by using an external remote control device (not shown) and transmitting an infrared signal to the projector main body 1A.

  3 and 4 are perspective views showing the inside of the projector main body 1A. However, it is a perspective view in which the outer case 8 is removed from the projector main body 1A. 3 is a perspective view seen from the upper right side in the front direction, and FIG. 4 is a perspective view seen from the upper left side in the rear direction. 5 and 6 are exploded perspective views of the projector main body 1A. However, it is an exploded perspective view in which the outer case 8 is removed from the projector main body 1A. 5 is an exploded perspective view seen from the upper right side in the front direction, and FIG. 6 is an exploded perspective view seen from the upper left side in the rear direction. Further, the optical unit 3 shown in FIGS. 5 and 6 is illustrated as an integrated configuration in which the cooling unit 7 and the like are assembled to the optical unit 3. 5 and 6 are exploded perspective views in which detailed components are omitted for convenience of explanation.

  As shown in FIGS. 3 to 6, the projector main body 1 </ b> A generally includes a frame 2, an optical unit 3, a circuit unit 5, a cooling unit 7, an exterior case 8, and the like.

  The frame 2 includes a first frame 21 and a second frame 22. The first frame 21 is a main member that holds all the constituent parts of the projector main body 1A and supports (fixes) the supporting part 1C.

  The first frame 21 is made of metal (for example, magnesium or aluminum). The first frame 21 includes a frame main body 211 that is positioned on the upper side inside the projector main body 1A and that is formed so as to follow the outer shape of the columnar shape and to hold each component inside. The first frame 21 includes a protruding portion 212 that protrudes upward in the center of the Y direction on the upper side of the frame main body 211. One end of the supporting member 1C1 is inserted into the protruding portion 212, and is fixed from the side surface of the protruding portion 212 with a screw, thereby fixing the supporting member 1C1 and the first frame 21.

  In the first frame 21, a plurality of optical unit fixing portions 213 for fixing an optical unit 3 (base housing 40) to be described later with screws are formed at the end portions in the left-right direction of the frame body 211. The first frame 21 is formed with a pair of second frame fixing portions 214 for fixing the second frame 22 with screws at the end portions in the left-right direction of the frame body 211 at positions sandwiched between the optical unit fixing portions 213. .

  The first frame 21 is formed with a pair of main case fixing portions 215 for fixing the main case 80 and the second front case 82 constituting the outer case 8 in a state of extending forward at the front end portion of the frame body 211. ing. The first frame 21 is formed with a pair of rear case fixing portions 216 for fixing the rear case 83 constituting the outer case 8 with screws at the rear end portion of the frame main body 211.

  The second frame 22 is made of resin. The second frame 22 includes a frame main body 221 that is positioned on the lower side inside the projector main body 1A (the lower side of the first frame 21) and is formed along a cylindrical outer shape. The second frame 22 is formed with a pair of frame fixing portions 222 fixed to the first frame 21 by screws at the ends in the left-right direction. Note that when the frame fixing portion 222 is fixed to the second frame fixing portion 214 of the first frame 21, the frame fixing portion 222 is screw-fixed via the cylindrical relay member 230.

  In the second frame 22, a pair of rear case fixing portions 223 for fixing the rear case 83 constituting the outer case 8 with screws are formed in a state of extending rearward at the rear end portion of the frame main body 221. The second frame 22 is formed with a plurality of temporary fixing portions 224 at the end of the frame main body 221 for fixing to the base housing 40 of the optical unit 3 when the second frame 22 is fixed to the first frame 21. ing. Basically, the second frame 22 is fixed to the first frame 21.

The optical unit 3 is configured by housing optical components constituting the optical system of the present embodiment in an optical unit housing 4.
The optical unit housing 4 includes a base housing 40 serving as a base housing, a first housing 41 installed on the upper side of the base housing 40, and a second housing installed on the lower side of the base housing 40. It is comprised with the body 42. FIG.

  The base housing 40 is generally formed in a plate shape and constitutes a part of the optical path. The base casing 40 includes a plurality of base casing fixing portions 401 that are formed to protrude upward at the outer peripheral end portion in the left-right direction and are fixed to the optical unit fixing portion 213 of the first frame 21 with screws. In addition, the base casing 40 includes a plurality of fixing portions that fix the first casing 41 and the second casing 42.

  The first housing 41 is a housing for housing an illumination optical system 30 described later, and includes a first upper housing 411 and a first lower housing 412. An optical component constituting the illumination optical system 30 is accommodated inside the first lower casing 412, and the first upper casing is disposed on the upper portion of the first lower casing 412 so as to cover the accommodated illumination optical system 30. 411 is installed.

  The second housing 42 is a housing for housing optical components after the integrator optical system 31 described later, and includes a second upper housing 421, a second lower housing 422, and a cover member 423. The optical components constituting the optical system after the integrator optical system 31 are accommodated inside the second upper casing 421, and the second optical system is disposed under the second upper casing 421 so as to cover the optical components after the integrator optical system 31 accommodated. A second lower housing 422 is installed on the side. A cover member 423 is installed on the lower side of the second lower housing 422.

  The assembly of the optical components into the second housing 42 is performed by assembling the corresponding optical components with the second upper housing 421 on the lower side, and then attaching the second lower housing 422 to the second upper housing 421. Install from above. Thereafter, the second drive circuit block 52A connected to the light modulation device 34 by FPC (Flexible Printed Circuits) (not shown) is fixed. Thereafter, the cover member 423 is installed. Thereafter, the vertical direction is reversed, and the second upper casing 421 is installed on the lower side of the base casing 40. Thereby, the optical unit 3 is configured integrally with the first housing 41 and the second housing 42 fixed with the base housing 40 as a base.

  As described above, the optical unit 3 that accommodates various optical components includes the base casing 40, the first casing 41, and the second casing 42 as the optical unit casing 4. In this case, as shown in FIGS. 5 and 6, the upper outer surface of the first housing 41 (first upper housing 411) is defined as a first surface 411a, and the second housing 42 (second lower housing 422). When the lower outer surface is the second surface 422a, the optical unit housing 4 is a housing having a first surface 411a and a second surface 422a facing each other. The metal first frame 21 is disposed to face the first surface 411a and fixes the optical unit 3. The resin-made second frame 22 is disposed so as to face the second surface 422 a and is fixed to the first frame 21. Further, the optical unit 3 is located between the first frame 21 and the second frame 22.

  In the present embodiment, the projector 1 (projector body 1 </ b> A) is provided with a support 1 </ b> C that is fixed to the first frame 21, and the projector 1 includes the first frame 21 with respect to the second frame 22. Therefore, it is used by being suspended by the support portion 1C so as to be positioned in the direction opposite to the gravity direction (−Z direction) (+ Z direction).

FIG. 7 is a schematic diagram showing the configuration of the optical system. Here, the optical system accommodated in the optical unit 3 will be described.
The optical system includes an illumination optical system 30 that emits white light W, a first mirror 3Ma, a second mirror 3Mb, an integrator optical system 31, a color separation light guide optical system 32, a light modulation device 34, a cross dichroic prism 35, and projection optics. A device 36 is provided.

  Illumination optical system 30 stores a light source device, a wavelength conversion device, optical components arranged on the front side and the rear side of the optical path of the wavelength conversion device, and these members, although detailed illustration of constituent members is omitted. A storage member or the like is provided. The light source device includes a plurality of semiconductor lasers that emit blue light B as light sources, and emits blue light B in the + X direction in the present embodiment.

  The wavelength conversion device includes a wavelength conversion element and a rotation device. The wavelength conversion element is formed in a disc shape, and on the disc surface, a phosphor layer is formed in a ring shape on the outer peripheral side, and a diffusion layer is formed in a ring shape on the inner peripheral side. The phosphor layer emits fluorescence Y including green light and red light by a part of the blue light B emitted from the light source. The diffusion layer diffuses the remainder of the blue light B emitted from the light source.

  The rotating device includes a motor or the like that rotates the wavelength conversion element. The illumination optical system 30 is housed in the first housing 41 and is disposed on the upper side of the base housing 40, and the fluorescence Y emitted from the phosphor layer and the blue light B diffused in the diffusion layer are combined. White light W is emitted backward (−Y direction).

  The first mirror 3Ma is emitted from the illumination optical system 30 and reflects the white light W traveling backward in the downward direction (−Z direction). The second mirror 3Mb reflects the white light W reflected by the first mirror 3Ma in the forward direction (+ Y direction). The first mirror 3Ma is housed in the first upper housing 411, and the second mirror 3Mb is housed in the first lower housing 412.

  The integrator optical system 31 includes lens arrays 311 and 312, a polarization conversion element 313, and a superimposing lens 314. The lens array 311 has a configuration in which small lenses are arranged in a matrix, and divides the white light W reflected by the second mirror 3Mb into a plurality of partial lights. The lens array 312 has substantially the same configuration as the lens array 311 and, together with the superimposing lens 314, partially superimposes the partial light on the light modulation device 34 described later. The polarization conversion element 313 has a function of aligning random light emitted from the lens array 312 with polarized light that can be used by the light modulation device 34.

  The color separation light guide optical system 32 includes dichroic mirrors 321 and 322, reflection mirrors 323 and 324 and 325, relay lenses 326 and 327, and a field lens 328. The color separation light guide optical system 32 separates the white light W emitted from the integrator optical system 31 into red light R, green light G, and blue light B, and guides each color light to the light modulation device 34 for each color light.

  The light modulation device 34 is provided for each color light. The light modulation device for red light is 34R, the light modulation device for green light is 34G, and the light modulation device for blue light is 34B. The light modulation device 34 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, an emitting-side polarizing plate disposed on the light emitting side of the liquid crystal panel, and an FPC (not shown). . One end of the FPC is connected to the liquid crystal panel, and the other end is connected to a connector (not shown) for each light modulation device mounted on a second drive circuit board 52 described later. The light modulation device 34 has a rectangular pixel region in which a plurality of micro pixels (not shown) are formed in a matrix, modulates incident color light, and forms a display image of each color light in the pixel region.

  The cross dichroic prism 35 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. The cross dichroic prism 35 combines the respective color lights modulated by the respective light modulation devices 34R, 34G, and 34B.

  The projection optical device 36 has a plurality of lenses (not shown) arranged along the optical axis 36Ax extending in the Y direction, and expands the light synthesized by the cross dichroic prism 35 in the forward direction (+ Y direction). Project. The projection optical device 36 includes a focus adjustment drive unit 365 (FIG. 3) and a zoom adjustment drive unit (not shown), and is configured to be able to perform focus adjustment and zoom adjustment by operating the remote control device from the outside. Yes.

  The optical unit 3 includes a head body (not shown), and supports the cross dichroic prism 35 and the projection optical device 36 on which the respective light modulation devices 34 are installed. The head body is fixed to the second housing 42. Further, the integrator optical system 31 and the color separation light guide optical system 32 are accommodated in the second casing 42 and are disposed below the base casing 40. After fixing the head body to the second housing 42, the cover member 423 is installed on the second lower housing 422 from the lower side.

  The illumination optical system 30 is not limited to a configuration using a semiconductor laser, and a configuration using a light emitting diode or a discharge type may be used. The light modulation device 34 is not limited to a transmissive liquid crystal panel, and a device using a reflective liquid crystal panel or a device using a micromirror device such as a DMD (Digital Micromirror Device) is used. It is possible.

  Next, as shown in FIGS. 3 to 6, the projector main body 1 </ b> A includes a cooling unit 7 for cooling the optical unit 3 and the circuit unit 5. The cooling unit 7 is fixed to the optical unit 3. The cooling unit 7 includes a first cooling unit 71 for cooling the optical system constituting the optical unit 3 and a second cooling unit 72 for cooling the entire interior of the projector main body 1A including the circuit unit 5 described later. I have.

  The first cooling unit 71 includes a cooling fan 711, a duct 712, and the like. The optical system is cooled by driving the cooling fan 711. The first cooling unit 71 is installed in the base housing 40.

  The second cooling unit 72 includes a cooling fan 721, a duct 722, and cooling fins 723. When the cooling fan 721 is driven, outside air is sucked from an air inlet 813 of the first front case 81 and a first air inlet 826 of the second front case 82, which will be described later, and flows through the duct 722 and blows to the cooling fins 723. Thus, the heat inside the projector main body 1 </ b> A transferred to the cooling fins 723 and the heat of the circuit unit 5 are cooled. Then, the warm outside air that has flowed through the cooling fins 723 is exhausted from the exhaust port 834 of the rear case 83 to the outside of the projector main body 1A. The second cooling unit 72 is installed in the base casing 40.

  FIG. 8 is a functional block diagram of the projector 1. Hereinafter, the circuit unit 5 (circuit board) will be described together with the functional blocks of the projector 1 with reference to FIGS.

  The projector 1 includes a power supply circuit 67 accommodated in the power supply unit 1B, and each part of the control system accommodated in the projector main body 1A. In the present embodiment, the circuit constituting each part of the control system accommodated in the projector main body 1A other than the power supply circuit 67 is, as shown in FIGS. 5 and 6, a control circuit board 50 serving as three circuit boards. The first drive circuit board 51 and the second drive circuit board 52 are allocated and mounted for each function. Note that the connection between the substrates and the connection with the optical component are performed by connecting to a connection connector (not shown) mounted on each substrate using a lead wire or FPC.

  The control circuit board 50 is configured as a control circuit block 50A, including that each corresponding circuit is mounted and then covered with a shield plate, a cover member, or the like for noise reduction or the like. Similarly, the first drive circuit board 51 and the second drive circuit board 52 are also configured as a first drive circuit block 51A and a second drive circuit block 52A.

  The circuit unit 5 accommodated in the projector main body 1 </ b> A includes a control unit 61 that comprehensively controls the operations of the projector 1 including the operations of the light source and the light modulation device 34. The control unit 61 includes a CPU, ROM, RAM, nonvolatile memory, system controller, and other peripheral circuits (not shown). Operating software and application software are stored in the nonvolatile memory, and BIOS (Basic Input / Output System) is stored in the ROM.

  The control unit 61 performs control by executing the BIOS stored in the ROM and the operating software and application software stored in the nonvolatile memory by the CPU. The control circuit including the control unit 61 and peripheral circuits related to the control unit 61 is mounted on a control circuit board 50 having a substantially rectangular shape.

  A video signal I / O (Input / Output) circuit 62 is connected to the control unit 61 via the bus 60. In this embodiment, the video signal I / O circuit 62 is connected to a LAN terminal 621, a memory card terminal 622, an HDMI (registered trademark) terminal 623, an audio output terminal 624, and the like. Note that image data and audio data are acquired from an external device (various devices such as a personal computer and a video player) and a memory card by connecting a cable, a memory card, or the like corresponding to these terminals. An audio output cable is connected to the audio output terminal 624, and audio is output by connecting to an external speaker (not shown) or the like.

  Note that the video signal I / O circuit 62 and its peripheral circuits are mounted on the control circuit board 50. In addition, as shown in FIGS. 4 to 6, the LAN terminal 621, the memory card terminal 622, the HDMI (registered trademark) terminal 623, and the audio output terminal 624 are the rear end (−Y direction) end of the control circuit board 50. To be implemented.

  The control unit 61 can read image data and audio data from the video signal input from the video signal I / O circuit 62, project an image based on the image data, and output audio based on the audio data. Note that image data and audio data acquired from an external device may be stored in a memory card by the video signal I / O circuit 62.

An image processing circuit 63, a light modulation device driving circuit 64, a light source driving circuit 65, and an IR receiving circuit 66 are connected to the control unit 61.
The image processing circuit 63 reads out the image data to be projected based on the control signal of the control unit 61, performs various processes such as resolution conversion, color tone correction, and keystone distortion correction, and outputs the processed image data in units of frames. It outputs to the modulation device drive circuit 64. The image processing circuit 63 is mounted on the control circuit board 50.

  In the present embodiment, the light modulation device driving circuit 64 is arranged in accordance with the image data for each frame input from the image processing circuit 63. In this embodiment, the light modulation device 34R for red light, which is composed of a transmissive liquid crystal panel, is used. A drive signal for driving the light modulation device 34G and the light modulation device 34B for blue light is output. An image is displayed as a result of the light emitted from the light source device (light source) being modulated by the light modulators 34R, 34G, and 34B in accordance with the drive signal output from the light modulator drive circuit 64.

  The light modulation device drive circuit 64 constitutes a second drive circuit that drives the light modulation devices 34R, 34G, and 34B together with peripheral circuits of the light modulation device drive circuit 64 and the like, and a second drive circuit board having a rectangular cutout portion. 52. In other words, the second drive circuit drives the light modulation devices 34R, 34G, and 34B based on the control signal output from the control unit 61.

  The light source drive circuit 65 constitutes a first drive circuit that drives the light source together with peripheral circuits of the light source drive circuit 65 and the like, and is mounted on the first drive circuit board 51 having a substantially rectangular shape. In other words, the first drive circuit drives the light source based on the control signal output from the control unit 61.

  The IR receiving circuit 66 receives and decodes an infrared signal transmitted from an external remote control device (not shown), generates operation data corresponding to the operation content in the remote control device, and outputs the operation data to the control unit 61. The IR receiving circuit 66 is mounted on the control circuit board 50. An infrared light receiving element (not shown) constituting the IR receiving circuit 66 is also connected to the control circuit board 50.

  The power supply circuit 67 is installed inside the power supply unit 1B. When power supply unit 1B is fixed to duct 500, for example, single-phase two-pole 100V AC power is supplied from contact conductors 672 and 672 provided on connector 671. The power supply circuit 67 supplies a low-voltage power supply to each part of the control system of the projector 1. For example, a direct current of 5 V or 3.3 V is supplied to the control unit 61, the video signal I / O circuit 62, the image processing circuit 63, the light modulation device driving circuit 64, and the IR receiving circuit 66.

The power supply circuit 67 can supply higher voltage power. For example, the power source circuit 67 includes a light source composed of a semiconductor laser included in the light source device, a light source driving circuit 65 that turns on the light source, and the light modulation devices 34R, 34G, and 34B. , 12V DC current is supplied.
As described above, the power supply circuit 67 includes an AC / DC conversion circuit, a voltage conversion circuit including a transformer and a switching circuit, and the like in order to supply necessary power to each unit of the projector 1.

  As shown in FIGS. 3 to 6, the control circuit board 50 includes a control unit 61 that performs overall control of the operation of the projector 1, a video signal I / O circuit 62, an image processing circuit 63, an IR receiving circuit 66, an infrared light receiving unit. Elements and peripheral circuits thereof, a LAN terminal 621, a memory card terminal 622, an HDMI (registered trademark) terminal 623, an audio output terminal 624, and the like are mounted. The control circuit board 50 constitutes a control circuit block 50A. The control circuit block 50A is positioned on the upper side of the first drive circuit block 51A and includes various connection members 502 having a shield function. The control circuit block 50A is fixed to the first drive circuit block 51A and is a base casing of the optical unit 3. 40 is fixed to the screw.

  The first drive circuit board 51 is mounted with a light source drive circuit 65 that outputs a drive signal to the light source to light the light source, a peripheral circuit of the light source drive circuit 65, and the like. In addition, the first drive circuit board 51 includes a shield plate 511 on the upper surface, and the first drive circuit block 51A is configured. The first drive circuit block 51A is located above the optical unit 3 (upper part of the first housing 41) and includes various connection members 512 having a shield function and the like, and the base housing 40 of the optical unit 3. It is fixed to the screw.

  The second drive circuit board 52 is mounted with an optical modulator drive circuit 64 that outputs a drive signal for driving each of the optical modulators 34R, 34G, and 34B, peripheral circuits of the optical modulator drive circuit 64, and the like. An FPC (not shown) provided in each of the light modulation devices 34R, 34G, 34B is connected to a connector (not shown) for each light modulation device mounted on the second drive circuit board 52. The second drive circuit board 52 forms a second drive circuit block 52A. The second drive circuit block 52A is positioned below the optical unit 3 (below the second housing 42) and includes various connection members 522 having a shield function and the like, and the base housing 40 of the optical unit 3. It is fixed to the screw.

  As shown in FIGS. 5 and 6, in the general assembly, the cooling unit 7 is fixed to the optical unit 3, and then the first drive circuit block 51 </ b> A is fixed to the upper side of the optical unit 3. The control circuit block 50A is fixed on the upper side of the first drive circuit block 51A. Further, the second drive circuit block 52A is fixed below the optical unit 3. The optical unit 3 configured and integrated as described above is fixed to the upper first frame 21. Thereafter, the second frame 22 is fixed to the first frame 21 from the lower side of the second drive circuit block 52A.

  With this structure and assembly, the control circuit board 50 (control circuit block 50A) is arranged between the first frame 21 and the optical unit 3 in the projector main body 1A. The first drive circuit board 51 (first drive circuit block 51A) is arranged between the optical unit 3 and the control circuit board 50. Further, the second drive circuit board 52 (second drive circuit block 52A) is arranged between the optical unit 3 and the second frame 22.

  In the present embodiment, the control circuit board 50 and the first drive circuit board 51 are disposed in the vicinity of the second cooling unit 72, and the second cooling unit 72 is moved from the first air inlet 826 of the second front case 82. The cooling efficiency of each substrate is improved by the cooling flow path that reaches the exhaust port 834 of the rear case 83. In particular, the cooling efficiency for the control circuit board 50 that generates a large amount of heat is improved.

  FIG. 9 is an exploded perspective view of the projector main body 1A. Specifically, FIG. 9 is an exploded perspective view showing the configuration of the exterior case 8 in the projector main body 1A. The configuration of the outer case 8 will be described including FIG. 1 and FIG.

  The exterior case 8 includes a main case 80, a first front case 81, a second front case 82, a rear case 83, and a sub case 84.

  The main case 80 includes a main case main body 801 formed in a substantially cylindrical shape extending in the Y direction and having openings 802 and 803 on the front and rear sides. On the upper surface of the main case 80, a semicircular cutout 804 is formed at the center in the Y direction. Further, a notch 805 for installing the sub case 84 is formed on the rear side of the notch 804. In addition, a window portion 806 for transmitting infrared rays is installed on the upper portion of the opening 802 of the main case 80.

  A pair of fixing portions 807 for fixing the main case 80 to the first frame 21 with screws in a step from the front opening 802 are formed approximately symmetrically on the YZ plane. The fixing portion 807 is also used as a part for fixing the second front case 82 to the main case 80 and the first frame 21. In addition, a plurality of fixing portions 808 for fixing the second front case 82 to the main case 80 with screws are provided.

  The sub case 84 includes a plate-like case main body 841 installed in the notch 805 of the main case 80. The sub case 84 is installed after the main case 80 is fixed to the first frame 21. The case main body 841 is formed with a semicircular notch 842. The notch portion 842 forms a hole shape with the notch portion 804 of the main case 80, thereby exposing the protruding portion 212 of the first frame 21 that fixes the support member 1C1. A circular hole 843 is formed on the rear side of the notch 842. The hole 843 is a hole through which a power cable extending from the power supply unit 1B is connected to the control circuit board 50.

  The second front case 82 includes a circular case main body 821 in a plan view from the front side, and a protrusion 822 that protrudes rearward from the periphery of the case main body 821. In addition, a pair of fixing portions 823 for fixing the second front case 82 to the first frame 21 together with the main case 80 (fixing portion 807) are formed at the front end portion of the protruding portion 822 approximately symmetrically with respect to the YZ plane. ing. In addition, a plurality of fixing portions 824 for fixing the second front case 82 to the main case 80 (fixing portion 808) are formed at the distal end portion of the protruding portion 822.

  The case main body 821 has a projection opening 825 through which light emitted from the projection optical device 36 of the optical unit 3 passes, a first air inlet 826 having a plurality of holes, and a second air inlet 827 having a plurality of holes. Is formed.

  The first front case 81 includes an outer frame 811 and an inner frame (not shown), and is detachably attached to the second front case 82. The outer frame 811 has a projection opening 812 through which light emitted from the projection optical device 36 passes, and a plurality of holes communicating with the first air inlet 826 and the second air inlet 827 of the second front case 82. An intake port 813 is formed. A projection opening through which light emitted from the projection optical device 36 passes and an intake port having a plurality of holes communicating with the first intake port 826 and the second intake port 827 are also formed in an inner frame (not shown). .

  The plurality of holes constituting the intake port 813 of the outer frame 811 and the plurality of holes constituting the intake port of the inner frame are formed from the plurality of holes constituting the first intake port 826 and the second intake port 827 when viewed from the front. It is formed at a shifted position. Thus, the projector main body 1A is configured so that the inside is difficult to visually recognize from the front, and external dust is difficult to enter the inside. The first front case 81 is formed so that a dustproof filter can be disposed between the outer frame 811 and the inner frame. Accordingly, the projector 1 is configured to be able to further suppress the intrusion of dust into the projector main body 1A by attaching the dustproof filter.

  The rear case 83 includes a circular case main body 831 in a plan view from the front side, and a protrusion 832 that protrudes forward from the periphery of the case main body 831. The case body 831 has an opening 833 that exposes an input terminal installed on the control circuit board 50. In addition, an exhaust port 834 is formed in the case main body 831. A pair of fixing portions 835 for screwing the rear case 83 to the main case 80 (rear case fixing portion 216) is formed at the tip of the protruding portion 832. In addition, a pair of fixing portions 836 for fixing the rear case 83 to the second frame 22 (rear case fixing portion 223) by screws are formed at the distal end portion of the protruding portion 832.

  In assembling the exterior case 8, first, the rear case 83 is fixed to the first frame 21 and the second frame 22 from the rear side of the projector main body 1A from which the exterior case 8 is removed. Thereafter, the main case 80 is inserted from the front side of the projector main body 1A, and the opening 803 of the main case 80 is abutted against the front side of the periphery of the case main body 831 of the rear case 83. Next, the sub case 84 is slid and installed in the notch 805 of the main case 80.

Thereafter, the protruding portion 822 is inserted into the opening 802 of the main case 80 from the front side of the projector main body 1 </ b> A where the main case 80 is installed. Then, the second front case 82 is fixed to the main case 80 and the first frame 21. Thereafter, the first front case 81 is locked and fixed to a locking portion formed on the case main body 821 of the second front case 82, whereby the projector main body 1A is completed.
As described above, the exterior case 8 having a cylindrical shape accommodates the optical unit 3, the first frame 21, and the second frame 22 in the exterior case 8.

  Note that the main case 80 constituting the exterior case 8 is fixed to the first frame 21. The second front case 82 is fixed to the first frame 21 and the main case 80. The rear case 83 is fixed to the first frame 21 and the second frame 22.

According to the first embodiment described above, the following effects can be obtained.
(1) In the projector 1 according to the present embodiment, the optical unit 3 is positioned between the first frame 21 and the second frame 22 so as to be surrounded by the two frames. On the other hand, it is possible to prevent the optical unit 3 from being damaged or to reduce the damage. Further, since the second frame 22 is made of resin, the weight of the projector 1 can be reduced. Further, since the first frame 21 that fixes the optical unit 3 is made of metal, the strength and reliability of holding the optical unit 3 are improved by improving the robustness of the first frame 21. In addition, since the second frame 22 is made of resin and is fixed to the first frame 21 with flexibility, for example, when an impact is applied to the second frame 22, the impact is absorbed and the first frame is absorbed. 21 is transmitted. Therefore, it is difficult to transmit a direct impact to the optical unit 3 fixed to the first frame 21, so that the optical unit 3 can be prevented from being damaged or reduced.

  (2) In the projector 1 of the present embodiment, when the optical unit 3 includes at least one of the light source, the light modulation device 34, and the projection optical device 36, the optical unit 3 accommodates the external impact. It is possible to prevent or reduce the damage of the optical component.

  (3) In the projector 1 of the present embodiment, the first frame 21 that fixes the optical unit 3 is suspended by the support portion 1C so as to be positioned in the direction opposite to the direction of gravity with respect to the second frame 22, The second frame 22 made of resin is positioned in the direction of gravity with respect to the first frame 21. If, for example, the projector 1 falls in this state, the probability that the second frame 22 will first receive a drop impact from the floor surface or the like increases. However, since the second frame 22 is made of resin, the drop impact is absorbed by the flexibility of the resin. In addition, since the optical unit 3 is fixed to the first frame 21 and is not fixed to the second frame 22, the drop impact received by the second frame 22 is not directly transmitted to the optical unit 3. Is transmitted in a relaxed state. Therefore, damage to the optical unit 3 can be prevented and the damage can be reduced with respect to an impact caused by dropping.

  (4) In the projector 1 of this embodiment, the control circuit board 50 on which the control circuit including the control unit 61 that controls the light source and the light modulation device 34 is mounted is disposed between the first frame 21 and the optical unit 3. As a result, the control circuit board 50 can be accommodated between the first frame 21 and the optical unit 3, and the projector 1 can be made compact. In addition, it is possible to prevent or reduce damage to the control circuit board 50 due to impact.

  (5) In the projector 1 of the present embodiment, the first drive circuit board 51 on which the first drive circuit (light source drive circuit 65) is mounted is disposed between the optical unit 3 and the control circuit board 50. The first drive circuit board 51 can be accommodated between the control circuit board 50 and the optical unit 3 inside the first frame 21. Thereby, the connection distance between the optical unit 3 and the first drive circuit board 51 can be shortened, and the projector 1 can be made compact. Further, it is possible to prevent or reduce the damage of the first drive circuit board 51 due to the impact.

  (6) In the projector 1 of the present embodiment, the second drive circuit board 52 on which the second drive circuit (light modulation device drive circuit 64) is mounted is disposed between the optical unit 3 and the second frame 22. Thus, the second drive circuit board 52 can be accommodated between the optical unit 3 inside the second frame 22. Thereby, the connection distance between the optical unit 3 and the second drive circuit board 52 can be shortened, and the projector 1 can be made compact. Further, it is possible to prevent or reduce the damage of the second drive circuit board 52 due to the impact.

  (7) In the projector 1 of the present embodiment, the optical unit 3, the first frame 21, and the second frame 22 are accommodated in the exterior case 8 having a columnar shape. The exterior case 8 is fixed to the first frame 21 and the second frame 22. Thereby, for example, when an impact is applied to the outer case 8 by dropping or the like, it is possible to prevent or reduce the damage of the optical unit 3 and the circuit boards (50, 51, 52) and the like against the impact. In addition, the projector 1 having a cylindrical shape can be made compact.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 1A ... Projector main body, 1C ... Support part, 3 ... Optical unit, 8 ... Exterior case, 21 ... 1st frame, 22 ... 2nd frame, 34 ... Light modulation apparatus, 36 ... Projection optical apparatus, 50 ... Control circuit board 51... First drive circuit board 52. Second drive circuit board 61. Control unit 64. Light modulation device drive circuit constituting the second drive circuit 65. Light source constituting the first drive circuit Drive circuit, 411a, first surface, 422a, second surface.

Claims (7)

An optical unit having a casing having a first surface and a second surface facing each other, and an optical component disposed inside the casing;
A first metal frame disposed opposite to the first surface and fixing the optical unit;
A resin-made second frame disposed opposite to the second surface and fixed to the first frame,
The projector according to claim 1, wherein the optical unit is positioned between the first frame and the second frame. The projector according to claim 1,
The optical component includes at least one of a light source, a light modulation device that modulates light emitted from the light source, and a projection optical device that projects light modulated by the light modulation device. The projector according to claim 1 or 2, wherein
A support portion fixed to the first frame;
The projector is characterized in that the support part suspends the first frame so that the first frame is positioned in a direction opposite to the gravitational direction with respect to the second frame. The projector according to claim 2 or 3, wherein
A control circuit board on which a control circuit including a control unit for controlling the light source and the light modulation device is mounted;
The projector, wherein the control circuit board is disposed between the first frame and the optical unit. The projector according to claim 4,
A first drive circuit for driving the light source based on a control signal output from the control unit;
A first drive circuit board on which the first drive circuit is mounted,
The projector according to claim 1, wherein the first drive circuit board is disposed between the optical unit and the control circuit board. The projector according to claim 4,
A second drive circuit for driving the light modulation device based on a control signal output from the control unit;
A second drive circuit board on which the second drive circuit is mounted,
The projector according to claim 1, wherein the second driving circuit board is disposed between the optical unit and the second frame. It is a projector as described in any one of Claims 1-6, Comprising:
A projector comprising: an outer case that houses the optical unit, the first frame, and the second frame and has a cylindrical shape.

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