JP2006259252A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector in which a mirror for rear projection is integrally constituted with a projector body, which performs projection on a large screen also at the time of rear projection, made in small size and in which quality of a projection image is enhanced. <P>SOLUTION: The projector 1 has a mirror mechanism part 100 transferrably connected to the projector body 2 and rotatably having a mirror 120 which reflects projection light to be projected from a projection lens 59 of the projector body 2 and the projector 1 is constituted so that the mirror mechanism part 100 and the projector body 2 are transferrable to a first transfer position where the projector body 2 is held in the mirror mechanism part 100 and the projection light is directly projected and a second transfer position where the mirror 120 is rotated to a prescribed position, the projected light is projected by reflecting it on the mirror 120. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector that projects an image by switching between front projection and rear projection.

  The projector includes a front projection type projector that directly enlarges and projects the projection light from the projector main body onto an external projection surface, and a rear projection type that has the projection surface on the projector main body and projects the projection light through the projection surface. There are projectors.

  As described in Patent Document 1, a projector that switches between a front projection type and a rear projection type and projects a revolving door with a screen disposed on a cabinet body, a reflecting mirror, and a projector body mounted on a turntable. In the closed state, it can be seen in a bright room as a rear projection, and when the revolving door is opened, the detection switch is activated, and the rotation of the rotating body linked to it is transmitted by the transmission belt to rotate the turntable 180 degrees. There is a liquid crystal projection device that projects a transmitted light image on a large screen provided outside by a configuration in which the projection lens portion of the projector main body is directed in the opposite direction and can be viewed as a large screen image.

  In addition, as described in Patent Document 2, when switching the usage state as a projector from the front type to the rear type, the built-in screen is moved to the imaging position by an external force applied by a unit operation from the user, In conjunction with this, the mirror automatically moves to the reflection position, reflects the image light beam, projects in the first projection direction, and forms an image on the built-in screen at the image formation position. When switching from the rear type to the front type, the built-in screen moves to the storage position due to the external force applied by the user from the unit operation, and the mirror automatically moves to the non-reflective position in conjunction with this. Thus, there is an image projection apparatus that projects in the second projection direction without reflecting the image on a mirror.

JP-A-5-300457 Japanese Patent Application Laid-Open No. 9-236871

  However, the configuration of the liquid crystal projection device described in Patent Document 1 mainly aims at rear projection using a screen disposed in the cabinet body as a projection surface, and a rotating body or transmission for switching between rear projection and front projection. Since the belt is used, there is a problem that the construction becomes large and the projector is also enlarged.

  Further, in the configuration of the image projecting device described in Patent Document 2, when switching to rear projection, there is a problem that projection on a large screen cannot be performed because the projection is performed on the built-in screen. In addition, when rear projection is performed, the lid of the image projection device opens, so if dust gets inside the device and adheres to components of the optical system such as a liquid crystal panel, the brightness of the image projected by the projection lens may decrease. There are problems such as the shadow of dust appearing in the projected image.

  The present invention has been made in view of the above problems, and a rear projection mirror is integrally formed with the projector main body, and can be projected on a large screen even during rear projection, and is a small projector that improves the quality of the projected image. The purpose is to provide.

  In order to achieve the above-described object, the present invention is a projector, which is movably connected to a projector main body and has a mirror that reflects projection light projected from a projection lens of the projector main body so as to be rotatable. A mirror mechanism section, and the mirror mechanism section and the projector body include a first movement position in which the projector body is housed in the mirror mechanism section and the projection light can be directly projected, and the mirror is rotated to a predetermined position. It is configured to be movable to a second movement position that can be projected and reflected by a mirror to be projected.

  According to such a projector, the mirror mechanism is integrally configured by being connected to the projector body. In the case of front projection in which projection light is directly projected, the projector can be reduced in size by moving the mirror mechanism unit to the first movement position that houses the projector body. In the case of rear projection in which the projection light is reflected by the mirror and projected, the projection is performed by rotating the mirror to a predetermined position and moving the mirror mechanism and the projector main body to the second movement position. Thus, it is possible to project on a large screen even during rear projection, and at the same time, dust does not enter the projector body, so that the quality of the projected image can be improved as compared with the conventional case.

  In the present invention, “front projection” means that the projection light projected from the projection lens of the projector body is projected directly onto the projection surface outside the projector. “Rear projection” means that the projection light projected from the projection lens of the projector main body is reflected on the mirror and projected onto the projection surface in the direction opposite to the front projection direction. Therefore, as described in Patent Documents 1 and 2, the configuration of the projector differs from that of a rear projection type projector that has a projection surface in the projector body and transmits projection light through the projection surface. The projection surface is not provided in the projector body. However, by projecting onto a transmissive projection surface using the rear projection configuration of the present invention, the projected image can be seen through.

  In the projector, the mirror mechanism unit includes a mirror holding housing that forms an exterior of the mirror mechanism unit, a mirror rotating unit that rotates the mirror, a moving unit that moves the projector main body with respect to the mirror mechanism unit, and a projector It is preferable to have a fixing part that fixes the main body to the mirror mechanism part.

  According to such a projector, the mirror mechanism unit configures the exterior of the mirror mechanism unit by the mirror holding housing, rotates the mirror by the mirror rotating unit, moves the projector main body by the moving unit, and moves by the fixing unit. In the case of front projection in which projection light is directly projected by fixing the projector body, the mirror mechanism can be moved and fixed to the first movement position that houses the projector body, and the projector can be downsized. Can do. In the case of rear projection in which the projection light is reflected by the mirror and projected, the mirror can be rotated to a predetermined position, and the mirror mechanism and the projector main body can be moved and fixed to the second movement position. In addition, since the projection can be performed on a large screen even during rear projection, and dust does not enter the projector body, the quality of the projected image can be improved as compared with the conventional case.

  In the projector, when the projector main body is accommodated in the mirror mechanism, the mirror is preferably arranged so as to face the upper surface of the projector main body.

  According to such a projector, since the mirror is disposed so as to face the upper surface portion of the projector main body, it is necessary to secure an area of the mirror necessary for reflecting the projection light from the projector main body without excess or deficiency. Is possible. It is also possible to protect the mirror from external impacts.

  In the projector described above, when the projection light from the projector main body is reflected by the mirror and projected, the mirror mechanism unit is fixed by the fixing unit so that the projection angle of the projection light from the projector main body is a predetermined angle with respect to the mirror. It is preferable to fix the projector body.

  According to such a projector, in the case of rear projection in which the projection light from the projector main body is reflected by the mirror and projected, the mirror mechanism section has a predetermined projection angle of the projection light from the projector main body with respect to the mirror. By fixing the projector body to the angle so that the angle is fixed, the projection light can be reflected on the mirror and projected onto the projection surface, so that the projection lens installed inside the projector body can be shifted without shifting. Rear projection can be performed.

  In the projector, when the mirror mechanism unit and the projector main body move to the second movement position, the projector is preferably supported by the mirror mechanism unit and the projector main body.

  According to such a projector, it is possible to set the projection light from the projector main body to be reflected on the mirror without excess or deficiency. Further, since the projector can be stably placed on the desk surface or the like by being supported by the mirror mechanism and the projector body, the projected image projected rearward can be stabilized without shaking.

  In the projector described above, a position detection unit that detects the position of the projector main body with respect to the mirror mechanism unit, and a position at which the projection light from the projector main body is reflected on the mirror and projected directly based on the detection signal detected by the position detection unit. It is preferable to include a position determination unit that determines whether to project, and a video direction switching unit that switches the direction of the projected image based on the determination result of the position determination unit.

  According to such a projector, since the direction of the projected image is switched according to the position of the rear projection in which the projection light from the projector body is reflected by the mirror and projected, and the position of the front projection to be projected directly, A normal image can be projected with front projection. Therefore, the convenience of the projector is improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment)

  FIG. 1 is a schematic perspective view of a projector according to an embodiment of the present invention, FIG. 1A is a perspective view in a front projection state, and FIG. 1B is a rear projection state. It is a perspective view. With reference to FIG. 1, an outline configuration of the appearance of the projector 1 will be described.

  In the projector 1, the configuration will be described with respect to all six surfaces, which are the external appearance surfaces of the projector body 2, as an upper surface portion 1 a, a front surface portion 1 b, a left side surface portion 1 c, a right side surface portion 1 d, a back surface portion 1 e, and a bottom surface portion 1 f.

  As shown in FIG. 1, the projector 1 includes a projector body 2 and a mirror mechanism unit 100. In addition, the projector main body 2 and the mirror mechanism unit 100 are connected so as to be movable. As shown in FIG. 1A, at the time of front projection, the projector body 2 is housed in the mirror mechanism unit 100, and the projector 1 has a substantially rectangular parallelepiped appearance surface with almost no unevenness. The position where the projector body 2 is housed in the mirror mechanism unit 100 and performs front projection is defined as the first movement position.

  The exterior of the mirror mechanism unit 100 is configured by a mirror holding housing 105. The mirror holding housing 105 includes a mirror holding case 110 that holds the mirror 120 on the inner surface side, a front case 140, and a lower case 150. The lower surface case 150 includes a right side case 160, a left side case 170, and a lower side case 180.

  Further, the mirror holding case 110 and the front case 140 are connected by two mirror rotating portions 130, and the mirror holding case 110 is rotatable with respect to the front case 140. The front case 140 and the lower case 150 are integrally formed.

  In addition, on the inner surface side of the right side case 160 and the left side case 170, the fixed part 200 and the moving part 300 are formed at positions facing each other. In addition, on the inner surface side of the left side case 170, a position detection unit 400 is configured in combination with the region of the fixed unit 200.

  As shown in FIG. 1A, the mirror holding case 110 is positioned so as to cover the upper surface portion 1a of the projector body 2 during front projection. At this time, the mirror 120 is accommodated in the mirror holding case 110 and disposed so as to face the upper surface portion 1 a of the projector main body 2. The front case 140 covers the front surface portion 1b of the projector main body 2, the right side case 160 covers the right side surface portion 1d of the projector main body 2, the left side case 170 covers the left side surface portion 1c of the projector main body 2, and the lower side surface case. 180 is positioned so as to cover the bottom surface portion 1 f of the projector main body 2. The front case 140 is formed with an insertion hole 141 for projecting the projection lens unit 60. At the time of front projection, the front end portion of the projection lens unit 60 projects through the insertion hole 141, and the projector body 2 functions as a mirror mechanism. Part 100 is accommodated. Details will be described later.

  As shown in FIG. 1B, during rear projection, the mirror holding case 110 is rotated and opened, and the projector main body 2 is moved along the moving unit 300 of the mirror mechanism unit 100 to be fixed at a predetermined position. . Then, the projection light from the projection lens is reflected by the mirror 120 and projected onto the projection surface. In the present embodiment, the position of the mirror mechanism unit 100 and the projector main body 2 at the time of rear projection is the second movement position. Details will be described later.

  Note that the projector body 2 has an exterior made up of a projector housing 10. Further, a sound emitting hole 15 for emitting sound output from a speaker 37 (shown in FIG. 2) provided in the projector main body 2 is formed in the upper surface portion 1a of the projector main body 2. In addition, a remote controller light receiving unit 17 that receives a signal from a remote controller (hereinafter referred to as a remote controller) 510 is provided on the back surface unit 1 e in order to control the operation of the projector 1. Further, an interface unit 16 for connecting to an external video device or the like is provided.

  Further, the projector housing 10 forms a recess 11 in the left side surface portion 1c, the right side surface portion 1d, and the bottom surface portion 1f so as to correspond to the shape of the lower surface case 150 of the mirror mechanism portion 100, so that the projector main body 2 is connected to the mirror mechanism portion 100. When the projector 1 is housed in the projector 1, the external surface of the projector 1 is configured to have no irregularities. Further, in the concave portion 11 between the left side surface portion 1c and the right side surface portion 1d of the projector housing 10, a fixed portion 200 formed on the right side surface case 160 and the left side surface case 170, and a fixed portion 200 corresponding to the moving portion 300, The moving part 300 is formed and operates in cooperation with each other. Details will be described later.

  A two-dot chain line illustrated in FIG. 1 indicates an image of the direction of the projection light projected from the projection lens unit 60.

  2 is a schematic side view of the projector at the time of front projection, and a cross-sectional view of the fixed unit, the moving unit, and the position detecting unit. FIG. 2 (a) is a schematic side view of the projector, and FIG. FIG. 2B is a cross-sectional view of the fixing unit and the position detection unit, and FIG. 2C is a cross-sectional view of the moving unit. The configuration and operation of the projector 1 during front projection will be described with reference to FIG. Note that FIG. 2A also illustrates an optical configuration unit 50 and a circuit configuration unit inside the projector main body 2.

The configuration of the optical configuration unit 50 will be described with reference to FIG.
The projector 1 of this embodiment uses an LED (Light Emitting Diode) light source 52 as a light source as an optical system.

  The optical configuration unit 50 is a part that configures the optical system of the projector 1, and includes a light source 51, an optical conversion unit 54, and a projection lens 59. The light source 51 includes an LED light source 52 as a light source and a condenser lens 53. The optical conversion unit 54 includes a collimator lens 57, an expansion lens 58, and a liquid crystal light valve 56 as the conversion unit 55.

  The optical component 50 is disposed at a substantially planar center and a substantially cross-sectional center of the projector body 2. The light source 51 is disposed on the back surface 1e side, the optical conversion unit 54 and the projection lens 59 are disposed in this order, and the projection lens unit 60 holds and fixes the projection lens 59 on the front surface 1b. The front end portion of 60 extends from the projector main body 2. The optical conversion unit 54 is disposed in front of the light source 51 in the order of a collimator lens 57, an extension lens 58, and a liquid crystal light valve 56 as the conversion unit 55. The optical structure part 50 is arrange | positioned on a straight line in the arrangement | positioning order mentioned above. The liquid crystal light valve 56 has a light valve cable 24 and is connected to a circuit unit 20 described later.

The operation of each component will be briefly described.
The condensing lens 53 emits the light emitted from the LED light source 52 forward. The collimator lens 57 converts the light emitted from the light source 51 into parallel light and emits it. The expansion lens 58 expands the parallel light emitted from the collimator lens 57 according to the size of a predetermined incident light region (not shown) of the liquid crystal light valve 56 and emits it.

  In this embodiment, the liquid crystal light valve 56 uses a transmissive color liquid crystal panel, and is driven based on a signal from an LCD (Liquid Crystal Display) drive unit 34 to modulate the light emitted from the expansion lens 58. Convert to video. The liquid crystal light valve 56 is not limited to a transmissive liquid crystal panel, and a reflective liquid crystal panel, a digital micromirror device, or the like can also be used.

  The projection lens 59 is composed of several types of lenses, enlarges the image modulated by the liquid crystal light valve 56, and emits the image to the outside of the projector 1.

  With the configuration and operation of the optical configuration unit 50 described above, the projector 1 enlarges and projects an image on a projection surface such as a screen 500 (illustrated in FIG. 6) installed outside the projector 1.

The configuration of the circuit unit 20 will be briefly described with reference to FIG.
The circuit unit 20 is obtained by mounting elements constituting each circuit unit of a circuit block of the projector 1 described later on a circuit board 21. The circuit unit 20 is housed and fixed at a predetermined position on the inner surface side of the projector housing 10 on the upper surface portion 1a side.

  The circuit unit 20 connects a CPU (Central Processing Unit) 22 which is an element constituting each circuit unit, a connector (not shown) constituting a power connector 41, a speaker 37, and a light valve cable 24 based on a circuit board 21. The cable connector 23 to be mounted is mounted. The other elements are not shown.

  The configuration and operation of the fixed unit 200 and the moving unit 300 during front projection will be described with reference to FIG.

  As shown in FIG. 2A, a front surface of the left side case 170 of the mirror mechanism unit 100 on the side of the projector body 2 is used as a fixing unit 200 for fixing the projector body 2 to the mirror mechanism unit 100. A front fixing part 210 used during projection and a rear fixing part 220 used during rear projection are formed. Further, a fixing unit 230 is formed on the outer surface of the projector housing 10 facing the left side case 170 as a fixing unit 200 that is commonly used for the front and rear, and operates in cooperation with each other.

  Further, on the surface of the left side case 170 of the mirror mechanism unit 100 on the side of the projector main body 2, as a moving unit 300 for moving the projector main body 2 with respect to the mirror mechanism unit 100, a slide unit 310 and rear projection are performed. A rear rotation unit 330 is formed for rotating the projector body 2 to a predetermined position with respect to the mirror mechanism unit 100. Further, on the outer surface of the projector housing 10 facing the left side case 170, a slide projection 315 as the moving unit 300 is formed and operated in cooperation with each other.

  It should be noted that the projector case facing the left side case 170 and the left side case 170 are also provided on the surface on the projector body 2 side of the right side case 160 of the mirror mechanism 100 and the outer surface of the projector case 10 facing the right side case 160. The fixed part 200 and the moving part 300 are formed in the same manner as formed on the outer surface of the body 10. In addition, since the left side case 170 and the right side case 160 are the same in configuration and operation of the fixed unit 200 and the moving unit 300, in the present specification, the fixed unit 200 and the moving unit 300 in the left side case 170 are described. The configuration and operation will be described, and the description on the right side case 160 will be omitted.

  FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A, and is an enlarged cross-sectional view of the front fixing unit 210 during front projection. The configuration and operation of the front fixing unit 210 will be described with reference to FIG.

  At the time of front projection, the surface on the projector body 2 side of the left side case 170 has a hemispherical concave shape, and a front fixing concave portion 211 that constitutes the front fixing portion 210 is formed. Further, on the outer surface of the projector housing 10 facing the front fixing recess 211 formed in the left side case 170, a fixing unit groove 12 serving as a cylindrical recess is formed, and the front fixing portion 210 and the rear fixing portion 210 are formed. A fixing unit 230 constituting the fixing portion 220 is press-fitted.

  The fixing unit 230 includes a fixing convex portion 235, a fixing spring 236, and a fixing case 237 that accommodates the fixing convex portion 235 and the fixing spring 236. The fixed case 237 has a cylindrical hollow shape and has a circular hole on one end surface. One of the fixing convex portions 235 has a hemispherical convex shape, and the other has a disk shape. In detail, the fixing unit 230 is configured so that the fixing spring 236 has a circular shape of the fixing convex portion 235 so that the hemispherical convex portion of the fixing convex portion 235 protrudes into the circular hole of the fixing case 237. It is the structure accommodated in the state which pressed the plate-shaped part.

  During front projection, the hemispherical convex portion of the fixing convex portion 235 protruding from the fixing unit 230 enters the front fixing concave portion 211, so that the projector body 2 is fixed to the mirror mechanism portion 100. Accordingly, the projector main body 2 can be accommodated and fixed in the mirror mechanism unit 100 at the first movement position that is the position at the time of front projection.

  When the projector main body 2 is moved with respect to the mirror mechanism unit 100 using the slide part 310, the fixing convex part 235 compresses the fixing spring 236 to reduce the depth of the front fixing concave part 211. It is necessary to move the projector body 2 with a force exceeding the distance D. This force corresponds to the fixing force of the front fixing portion 210.

  2C is a cross-sectional view taken along the line CC in FIG. 2A, and is an enlarged cross-sectional view of the slide portion 310 during front projection. The configuration and operation of the slide unit 310 will be described with reference to FIG.

  A side surface of the projector body 2 of the left side case 170 has a concave portion with a U-shaped cross section, and a slide groove 312 has a length extending from the boundary between the front case 140 and the left side case 170 to the rear rotating portion 330. Is formed.

  A projection 315 having a predetermined length is formed on the outer surface of the projector housing 10 facing the slide groove 312, having a U-shaped convex section. The slide protrusion 315 is configured to be slidable along the slide groove 312. Accordingly, the projector body 2 can move (slide) with respect to the mirror mechanism unit 100.

  As shown in FIG. 2B, the front fixing recess 211 includes a front position detection unit 410 as a position detection unit 400 that detects the position of the projector main body 2 with respect to a mirror mechanism unit 100 described later. The configuration and operation of the front position detection unit 410 will be described with reference to FIG.

  The front position detection unit 410 includes a micro switch 411 that is a push-type detection switch, and a cable that mounts the micro switch 411 and transmits a signal detected by the micro switch 411 to a control unit 38 (shown in FIG. 6) as a position determination unit. And a detection circuit board 414 on which is mounted. As the microswitch, a microswitch having a specification different from that of the microswitch 411 used in this embodiment can be appropriately selected and used.

  The front position detection unit 410 is provided in a front fixing recess 211 that constitutes the front fixing unit 210. In order to fix the front position detection unit 410, a detection circuit fixing convex portion 172 is formed so as to protrude from the inner surface of the front fixing concave portion 211 formed on the outer surface of the left side case 170. The detection circuit fixing convex portion 172 forms a detection circuit groove 173 serving as a space in which the microswitch 411 can be accommodated. In addition, a shaft insertion hole 171 into which the movable shaft 412 of the micro switch 411 is inserted is formed at the lowest point portion of the front fixing concave portion 211 having a hemispherical concave shape.

  Here, by inserting the movable shaft 412 of the micro switch 411 into the shaft insertion hole 171, the main body 413 of the micro switch 411 is positioned in the detection circuit groove 173, and the shoulder of the detection circuit board 414 is projected to fix the detection circuit. The front position detector 410 is fixed by contacting the front end of the portion 172. By fixing the front position detection unit 410, the movable shaft 412 of the micro switch 411 is fixed with a protrusion amount H inside the front fixing recess 211.

  When the projector main body 2 is fixed to the mirror mechanism unit 100 by the front fixing unit 210 during front projection, the hemispherical convex portion of the fixing convex portion 235 of the fixing unit 230 is the movable shaft of the micro switch 411. 412 is pressed and pushed into the main body 413 side of the micro switch 411 by the protrusion amount H. Since the protrusion amount H of the movable shaft 412 is set in accordance with the stroke at which the microswitch 411 operates, the microswitch 411 operates as a switch input. In this case, in this embodiment, the detection signal of the micro switch 411 is “ON”, and the signal is output to the control unit 38. Details will be described later.

  FIG. 3 is a schematic side view of the projector during rear projection and a perspective view of the moving unit, FIG. 3A is a schematic side view of the projector, and FIG. 3B is a configuration of the moving unit. It is the perspective view which looked at the rear rotation part which performs from the projector main body side. FIG. 4 is a cross-sectional view taken along line EE shown in FIG. The form and operation | movement at the time of rear projection of the projector 1 are demonstrated using FIG. 3, FIG.

  First, an operation until the projector main body 2 moves with respect to the mirror mechanism unit 100 from the first movement position during front projection to the second movement position during rear projection will be described. In the present embodiment, the projector main body 2 is described as being moved with respect to the mirror mechanism unit 100. In the present invention, it is naturally possible to move the mirror mechanism unit 100 with respect to the projector body 2.

  The user holds the mirror holding case 110 in the front projection state and rotates it with respect to the front case 140 until the rotation of the mirror holding case 110 is prevented. In this case, the mirror holding case 110 is rotated with respect to the front case 140 by the mirror rotating unit 130. Then, when the mirror holding case 110 abuts against the shoulder 142 of the front case 140, the mirror holding case 110 is prevented from rotating. As a result, the mirror holding case 110 is substantially parallel to the front case 140. The mirror rotating unit 130 will be described later.

  Next, the user holds the projector body 2 and pulls it in the direction of the second movement position with respect to the mirror holding housing 105. As a result, in the front fixing portion 210, the fixing convex portion 235 of the fixing unit 230 gets over the step D of the front fixing concave portion 211, so that the fixing is released. Then, the projector main body 2 becomes slidable in a state in which the slide protrusion 315 can slide in the slide groove 312 of the slide portion 310.

  Next, the user slides the projector body 2 to a position where sliding is prevented while holding the projector body 2. As a result, the slide protrusion 315 is slid to the position of the rear rotating portion 330. The rear rotating unit 330 will be described later.

  Next, the user rotates the projector main body 2 with respect to the mirror mechanism unit 100 at that position. As a result, the slide protrusion 315 of the projector main body 2 rotates around the rear rotating portion 330. The user rotates the projector main body 2 to an angle at which the rotation of the projector main body 2 is prevented. In this case, when the rotation angle of the projector main body 2 reaches a predetermined angle, the rear fixing unit 220 prevents the projector main body 2 from rotating, and the projector main body 2 is fixed to the mirror mechanism unit 100.

  The position at which the rotation of the projector main body 2 is prevented by the rear fixing unit 220 is the position at the time of rear projection (second movement position). In this state, by placing the projector main body 2 and the mirror mechanism unit 100 on the desk surface 600, it becomes possible to perform rear projection. This state is shown in FIG.

  As shown in FIG. 3A, the projector 1 during rear projection is placed on the desk surface 600 with the corner portions of both the front case 140 of the mirror mechanism unit 100 and the projector body 2 as support portions. . At this time, both the regions including the rear fixing portion 220 and the rear rotating portion 330 that serve as a connecting portion between the mirror mechanism portion 100 and the projector main body 2 are in a state of floating from the desk surface 600.

  At the time of rear projection, as described above, the front surface portion 1 b of the projector main body 2 is lifted by the mirror mechanism portion 100. The mirror mechanism unit 100 also has an angle with respect to the projector body 2. As a result, the projection angle of the projection light projected from the projection lens unit 60 and the reflection angle reflected by the mirror 120 are set to a predetermined angle by the cooperation of the projector body 2 and the mirror mechanism unit 100. As a result, the projection light projected from the projection lens unit 60 of the projector main body 2 can be reflected on the mirror 120 without excess or deficiency. Thereby, the projector 1 can enlarge and project an image on the projection surface installed in the direction of the back surface portion 1e of the projector body 2. A two-dot chain line illustrated in FIG. 3A indicates an image of the direction of the projection light projected from the projection lens unit 60.

  FIG. 3B is a perspective view of the rear rotating unit 330 constituting the moving unit 300 as viewed from the projector body 2 side. Further, the slide projection 315 (illustrated by a two-dot chain line) slides in the slide groove 312 and comes into contact with the slide groove end 313, thereby preventing the slide projection 315 from sliding.

  The slide part 310 is connected to the rear turning part 330. The rear rotation unit 330 includes a rear rotation unit 332 and a rear rotation escape groove 337. The rear rotation escape groove 337 is connected to the slide groove 312 in a substantially cylindrical shape with the same depth as the slide groove 312 constituting the slide portion 310 of the left side case 170.

  The rear turning unit 332 includes a turning shaft 333 and a turning unit case 334 that houses the turning shaft 333 and a drive system. The rear rotation unit 332 press-fits the rotation unit case 334 into a rear rotation unit fixing hole (not shown) formed in the rear rotation escape groove 337 at the approximate center of the rear rotation escape groove 337. Fixed. The rotation shaft 333 protrudes from the rotation unit case 334 in a columnar shape in the space of the rear rotation escape groove 337. Further, the rotation shaft 333 having a columnar shape is formed with a slide projection groove 338 having a slit-like concave shape having a width slightly larger than the width of the slide projection 315. The rotation shaft 333 rotates about the rotation shaft 335 of the rear rotation unit 332, and is fixed while holding a predetermined fixing force at an arbitrary angle.

  Due to the configuration of the rear rotating portion 330 described above, the slide projection 315 slides on the slide groove 312 and slides on the slide projection groove 338 formed on the rotation shaft 333, so that the rear rotation escape groove 337 is formed. When contact is made with the slide groove end 313 which is a surface corresponding to the direction of the slide groove 312, sliding is prevented. At that time, the slide protrusion 315 is accommodated in a slide protrusion groove 338 formed in the rotating shaft 333. Further, the entire slide projection 315 is positioned inside the rear rotation escape groove 337.

  When the projector main body 2 is rotated with respect to the mirror mechanism unit 100 in this state, the slide projection 315 presses the slide projection receiving surface 338 a that is the side surface of the slide projection groove 338, thereby rotating the rotation shaft 333. Is rotated around the rotation shaft 335. Further, the slide projection 315 moves in the rear rotation escape groove 337 (in the direction of the arrow in the figure).

  Due to the above rotation, the rotation of the projector body 2 is blocked by the rear fixing portion 220 formed on the left side case 170 when a predetermined angle is reached. As a result, the projector body 2 is fixed with respect to the mirror mechanism unit 100.

  FIG. 4 shows a rear rotation in a state where the rotation of the projector body 2 is blocked by the rear fixing unit 220 and fixed to the mirror mechanism unit 100 (a state during rear projection). The cross section (EE cross section shown to Fig.3 (a)) of the part 330, the rear fixing | fixed part 220, and the rear position detection part 420 is shown. The configuration and operation of each unit will be described with reference to FIG.

  In the rear rotating portion 330, as described above, the slide projection 315 is fixed in a state of being sandwiched between the slide projection grooves 338 of the rotation shaft 333.

  As the rear fixing portion 220, as with the front fixing portion 210, a rear fixing concave portion 221 having a hemispherical concave shape is formed on the surface of the left side case 170 on the projector body 2 side. Further, the fixing unit 230 used in the front fixing portion 210 is located at a position facing the rear fixing concave portion 221. Then, the hemispherical convex portion of the fixing convex portion 235 protruding from the fixing unit 230 enters the rear fixing concave portion 221, whereby the projector main body 2 is fixed to the mirror mechanism portion 100. Accordingly, the projector main body 2 is fixed to the mirror mechanism unit 100 at the second movement position that is a position at the time of rear projection.

  When the mirror mechanism unit 100 and the projector main body 2 are moved from the second movement position that is the position at the time of rear projection to the first movement position that is the position at the time of front projection, the mirror mechanism unit 100 On the other hand, the projector main body 2 can be moved by performing the operation in the reverse procedure to that described above.

  Similar to the front position detection unit 410, the rear position detection unit 420 is configured in a front fixing recess 211. Therefore, the micro switch 421 (main body 423, movable shaft 422) that is a detection switch constituting the rear position detection unit 420 and the detection circuit board 424 are the micro switch 411 (main body 413) that is a detection switch constituting the front position detection unit 410. , Movable shaft 412) and detection circuit board 414. Further, the shaft insertion hole 174, the detection circuit fixing convex portion 175, and the detection circuit groove 176 for fixing the rear position detection unit 420 are also provided with the shaft insertion hole 171 for detecting the front position detection unit 410. The rear position detector 420 is fixed in the same manner as the circuit fixing convex portion 172 and the detection circuit groove 173.

  By fixing the front position detection unit 410 by bringing it into contact with the tip of the detection circuit fixing convex portion 175, the movable shaft 422 of the micro switch 421 similarly applies a protrusion amount H to the inside of the rear fixing concave portion 221. It is held and fixed.

  When the projector main body 2 is fixed to the mirror mechanism unit 100 by the rear fixing unit 220 during rear projection, the hemispherical convex portion of the fixing convex portion 235 of the fixing unit 230 is the movable shaft of the micro switch 421. 422 is pressed and pushed into the main body 423 side of the micro switch 421 by the protrusion amount H. Thereby, the micro switch 421 operates as a switch input, similarly to the micro switch 411 of the front position detection unit 410. In this case, the detection signal of the micro switch 421 is “ON” and the signal is output to the control unit 38. Details will be described later.

  FIG. 5 is a perspective view showing the mirror rotating portion. The configuration and operation of the mirror rotating unit 130 will be described with reference to FIG.

  As shown in FIG. 5, the mirror rotation unit 130 is a mechanism for rotating the mirror holding case 110 with respect to the front case 140 of the mirror mechanism unit 100, and is configured at two locations on the left and right. 5 is also an enlarged view of part A of FIG. 1B, and shows the mirror rotating part 130 configured on the left side. Since the mirror rotation unit configured on the right side is the same as the left mirror rotation unit 130 and operates in the same manner, the configuration and operation of the left mirror rotation unit 130 will be described.

  The mirror rotation unit 130 includes a mirror rotation unit 132. The mirror rotation unit 132 includes a mirror holding case fixing shaft 133 and a front case fixing bracket 134 that houses the mirror holding case fixing shaft 133 and the drive unit. The front case fixing bracket 134 has a cylindrical bracket body 134a that houses the drive part of the mirror holding case fixing shaft 133, and a bracket flat part 134b that has a flat surface connected to the bracket body 134a. Composed.

  Two screw holes are formed in the plane of the bracket flat portion 134b. Further, the mirror holding case fixing shaft 133 has two screw holes formed on a substantially rectangular parallelepiped plane projecting from the bracket body 134a. The mirror holding case fixing shaft 133 rotates about the rotation shaft 135 with respect to the front case fixing bracket 134 and is fixed while holding a predetermined fixing force at an arbitrary angle.

  Further, the mirror rotation unit 132 includes a bracket body 134 a accommodated in a groove 111 formed in the mirror holding case 110, and a mirror holding case fixing shaft 133 accommodated in a groove 112 formed in the mirror holding case 110. 137 is fixed to the mirror holding case 110. Further, the bracket flat portion 134 b is accommodated in a groove 143 formed in the front case 140 and is fixed to the front case 140 with a screw 138.

  With the above-described configuration, the mirror rotation unit 132 can connect the mirror holding case 110 to the front case 140 and fix the mirror holding case 110 to be rotatable. Then, the mirror holding case 110 rotates from the state of covering the upper surface portion 1a of the projector main body 2 at the time of front projection (a state forming an angle of about 90 degrees with respect to the front case 140), and the shoulder of the front case 140 is rotated. The rotation is prevented by coming into contact with 142 and is rotated to a state that is substantially parallel to the front case 140 (a state that forms an angle of approximately 180 degrees with respect to the front case 140). FIG. 5 shows a state in which the mirror holding case 110 is substantially parallel to the front case 140.

  In this embodiment, the mirror rotation unit 132 is accommodated in the grooves 111 and 112 formed in the mirror holding case 110 and the groove 143 formed in the front case 140. Moreover, each groove | channel 111,112,143 is covered with a lid | cover. Therefore, the mirror rotation unit 132 is visually invisible.

  FIG. 6 is a circuit block diagram of the projector. The circuit configuration and operation of the projector 1 will be described with reference to FIG.

  The projector 1 is connected to a personal computer (530) by wireless. The projector 1 includes an antenna 30, a communication unit 31, a signal conversion unit 32, an image processing unit 33, an LCD (Liquid Crystal Display) driving unit 34, an optical configuration unit 50, an LED (Light Emitting Diode) control unit 39, an audio processing unit. 35, amplifying unit 36, speaker 37, position detecting unit 400, remote control signal receiving unit 40 for receiving signals from remote controller 510, power connector 41, and control unit 38 for controlling overall operation of projector 1. Is done. Note that the personal computer 530 may be connected in a wired manner using a USB (Universal Serial Bus) cable or the like instead of wirelessly. The projector 1 is connected not only to the personal computer 530 but also to various video devices such as a DVD (Digital Versatile Disk) player. In that case, the connection is made via the interface unit 16 provided in the projector main body 2.

The operation of each circuit unit of the projector 1 will be briefly described.
The projector 1 receives encoded image data (still image data and moving image data), audio data, and the like from the personal computer 530 through the antenna 30 and the communication unit 31. The received image data and audio data are combined by the signal conversion unit 32, the image data is output to the image processing unit 33, and the audio data is output to the audio processing unit 35.

  The image processing unit 33 performs frame rate conversion and scaling processing on the image data input from the signal conversion unit 32. The image processing unit 33 also performs various image corrections such as brightness adjustment, contrast adjustment, and gamma correction processing on the image data. The image data processed in this way is output to the LCD drive unit 34 as a projection video signal. The LCD drive unit 34 drives the liquid crystal light valve 56 based on the projection video signal input from the image processing unit 33.

  The sound processing unit 35 converts the sound data, which is a digital signal input from the signal conversion unit 32, into an analog signal, amplifies it by the amplification unit 36, and emits the sound as sound through the sound emission hole 15.

  The LED control unit 39 performs brightness dimming of the LED light source 52 based on a signal from the control unit 38. Specifically, the drive frequency and duty ratio for driving the LED light source 52 are changed in correspondence with the scene of the image. As a result, in a bright scene, the LED light source 52 emits light brightly by increasing the drive frequency or lengthening the “ON” time of the duty ratio. On the other hand, in a dark scene, on the other hand, control is performed to reduce the light emission of the LED light source 52 by reducing the drive frequency or shortening the “ON” time of the duty ratio. The LED light source 52 emits white light (including light of all colors).

  The remote control signal receiving unit 40 receives the signal transmitted from the remote control 510 via the remote control light receiving unit 17 (shown in FIG. 1) and outputs it to the control unit 38. Note that the remote controller 510 performs communication using infrared rays.

  The control unit 38 comprehensively controls the entire operation of the projector 1 including the optical configuration unit 50 and the circuit unit 20 as a circuit configuration unit.

  Electric power for driving the projector 1 is supplied via a power adapter (not shown) provided separately from the projector 1. Thus, the power connector 41 is provided and connected to the plug 520 of the power adapter.

An operation in the position detection unit 400 will be described.
As described above, the position detection unit 400 includes the front position detection unit 410 and the rear position detection unit 420, and detects the position of the projector body 2 with respect to the mirror mechanism unit 100.

  Detection signals from the front position detection unit 410 and the rear position detection unit 420 are output to the control unit 38 via a cable. The control unit 38 has a function as a position determination unit that determines whether the input detection signal is an input signal from the front position detection unit 410 or an input signal from the rear position detection unit 420. Then, based on the determination result of the position determination unit, in the case of an input signal from the front position detection unit 410, a signal for switching to the direction of the projected image corresponding to the front projection is output to the image processing unit 33. Further, in the case of an input signal from the rear position detection unit 420, a signal for switching to the direction of the projected image corresponding to the rear projection is output to the image processing unit 33.

  The image processing unit 33 has a function as a video direction switching unit that switches the direction of the projected video based on an input signal from the control unit 38 as a position determination unit. Therefore, when a signal for switching the direction of the projected image corresponding to the front projection is input from the control unit 38, the image processing unit 33 changes the image data to the image in which the projected image is in the normal direction at the time of front projection. Is output to the LCD drive unit 34 as a projection video signal. In addition, when a signal for switching the direction of the projected image corresponding to the rear projection is input from the control unit 38, the image processing unit 33 displays the image data in which the projected image is switched to an image in which the projected image is in the normal direction during the rear projection. Is output to the LCD drive unit 34 as a projection video signal.

  The LCD drive unit 34 drives the liquid crystal light valve 56 based on the projection video signal input from the image processing unit 33. Thereby, the projection lens unit 60 projects the switched image on the projection surface. As a result, the user can view a projected image in a normal direction during front projection and rear projection.

  Specifically, when the projector main body 2 is positioned at the first movement position (front projection position), the micro switch 411 as the front position detection unit 410 is pressed by the fixing convex portion 235 of the fixing unit 230, and the micro switch 411 is pressed. The detection signal of the switch 411 is changed from “OFF” to “ON”, and the signal is output to the control unit 38. Similarly, when the projector body 2 is positioned at the second movement position (rear projection position), the micro switch 421 as the rear position detection unit 420 is pressed by the fixing convex portion 235 of the fixing unit 230, The detection signal of the micro switch 421 changes from “OFF” to “ON”, and the signal is output to the control unit 38. The control unit 38 receives the signal changed from “OFF” to “ON” from the front position detection unit 410 and the rear position detection unit 420, and performs the above-described processing.

  When the input signals from the front position detection unit 410 and the rear position detection unit 420 are “OFF”, the control unit 38 outputs a signal for turning off the light source 51 to the LED control unit. When the LED control unit receives the signal, the light source 51 is turned off. When the input signal is “ON”, a signal for turning on the light source 51 is output to the LED control unit. When the LED control unit 39 receives the signal, the light source 51 is turned on.

  Therefore, when the projector main body 2 is moving on the mirror mechanism unit 100, the output signals of the front position detecting unit 410 and the rear position detecting unit 420 are “OFF”, the light source 51 is not lit, and the projector main unit 2 displays the video. Do not project. As a result, while the projector main body 2 is moving through the mirror mechanism unit 100, it is possible to prevent problems such as projecting projection light to other users and to contribute to energy saving.

  In the above description, when the projector is moved to the first movement position and the second movement position, the projector main body 2 is moved with respect to the mirror mechanism unit 100. Naturally, the mirror mechanism 100 may be moved.

According to the embodiment described above, the following effects can be obtained.
(1) According to this embodiment, the projector main body 2 and the mirror mechanism unit 100 constituting the projector 1 are connected to each other by the moving unit 300 so as to be movable. In addition, the first moving position (front projection position) where the projection light can be directly projected and the mirror 120 can be rotated to a predetermined position, and the projection light can be reflected on the mirror 120 and projected. It is configured to be movable to a second moving position (rear projection position). Then, the moving unit 300 can move between the first movement position and the second movement position. Further, the projector main body 2 and the mirror mechanism unit 100 can be fixed by the fixing unit 200 at the first movement position and the second movement position.

  Accordingly, the projector can be miniaturized and front projection can be performed by moving and fixing the mirror mechanism unit 100 to the first movement position in which the projector main body 2 is accommodated. In addition, rear projection can be performed by moving and fixing the second movement position. Even when rear projection is performed, projection can be performed on a large screen, and in addition, dust does not enter the inside of the projector main body 2, so that the quality of the projected image can be improved as compared with the conventional case.

  Further, when such a configuration is used, the projection angle of the projection light from the projector main body 2 and the reflection angle at the mirror 120 can be set at the design stage, so that the user can visually recognize the rear projection. An image can be projected at an easy height. As a result, the distance between the projector 1 and the projection surface can be shortened compared to the distance required for the front projection to project at the same height as the rear projection. Therefore, it is suitable for projection in a narrow space, and the convenience of the projector 1 is improved.

  (2) According to the present embodiment, during front projection, the mirror holding case 110 is positioned so as to cover the upper surface portion 1a of the projector main body 2. At this time, the mirror 120 is accommodated in the mirror holding case 110, and the projector main body 2 is disposed so as to face the upper surface portion 1a. The area of the mirror 120 is the same as that of the mirror holding case 110. This makes it possible to secure the area of the mirror 120 necessary for reflecting the projection light from the projector body 2 without excess or deficiency. It is also possible to protect the mirror 120 from external impacts.

  Further, since the mirror 120 is disposed so as to face the upper surface portion 1a of the projector main body 2, the area of the mirror 120 is the size of the outer shape of the projector main body 2, the position of the projection lens 59, the projection light, and the like. It is possible to freely set it within the plane area of the upper surface portion 1a in consideration of the spread of the surface. As a result, the degree of design freedom in setting the area of the mirror 120 is expanded.

  (3) According to the present embodiment, at the time of rear projection, the mirror mechanism unit 100 causes the projector main body 2 to be fixed by the fixing unit 200 so that the projection angle of the projection light from the projector main body 2 becomes a predetermined angle with respect to the mirror 120. Is fixed. Therefore, it is not necessary to shift the projection lens 59 installed in the projector main body 2, and rear projection can be performed. Thereby, the convenience of the projector 1 is improved.

  (4) According to the present embodiment, when the mirror mechanism unit 100 and the projector main body 2 move to the second movement position, the projector 1 is supported by the mirror mechanism unit 100 and the projector main body 2, and the desk surface 600. Therefore, the projector 1 can be set to a mode in which the projection light from the projector body 2 is reflected by the mirror 120 without excess or deficiency. In addition, since the projector 1 can be stably placed on the desk top surface 600 or the like in a form supported by the mirror mechanism unit 100 and the projector main body 2, the rear projected image can be stabilized without shaking. Can do.

  (5) According to the present embodiment, the position detection unit 400 that detects the position of the projector main body 2 with respect to the mirror mechanism unit 100 is provided. Further, based on the detection signal detected by the position detection unit 400, the control unit 38 as a position determination unit that determines whether the projection light from the projector main body 2 is reflected by the mirror 120 and projected or directly projected. have. And it has the image processing part 33 as a video direction switching part which switches the direction of the image | video to project based on the judgment result of a position judgment part. Thereby, the projection is performed by the rear projection position (second movement position) where the projection light from the projector body 2 is reflected by the mirror 120 and projected, and the front projection position (first movement position) where the projection light is directly projected. Since the direction of the image to be switched is switched, it is possible to project an image in a normal direction between the rear projection and the front projection. Therefore, the convenience of the projector is improved.

  In addition, this invention is not limited to embodiment mentioned above, A various change, improvement, etc. can be added. A modification will be described below.

  (Modification 1) In the above-described embodiment, the mirror holding case 110 that accommodates the mirror 120 during rear projection is rotated by the mirror rotating unit 130 and brought into contact with the shoulder 142 of the front case 140 to restrict the rotation. By doing so, it is made substantially parallel to the front case 140. However, the present invention is not limited to this, and the mirror holding case 110 may be further rotatable with respect to the front case 140 by eliminating the shoulder 142 of the front case 140. This increases the degree of freedom in setting the projection angle from the projection lens unit 60 (projection lens 59) and the reflection angle at the mirror 120 during rear projection. In addition, the projection height when the reflected light from the mirror 120 is projected can be adjusted.

  (Modification 2) In the above embodiment, the mirror 120 is rotated by the mirror rotation unit 130 so as to be parallel to the front case 140 during rear projection. However, the present invention is not limited to this, and the rear projection may be performed by moving the mirror 120 or the mirror holding case 110 containing the mirror 120 by sliding in parallel with the front case 140 after the rotation.

  In this case, when only the mirror 120 is slid, it is possible to dispose the slide mechanism in the mirror holding case 110. Further, in the case of sliding together with the mirror holding case 110, it is possible to arrange a sliding mechanism that slides with respect to the front case 140. This increases the degree of freedom in setting the projection angle from the projection lens unit 60 and the reflection angle at the mirror 120 during rear projection. In addition, the projection height when the reflected light from the mirror 120 is projected can be adjusted.

  (Modification 3) In the embodiment described above, the mirror holding case 110 that houses the mirror 120 is rotated with respect to the front case 140 by the mirror rotating unit 130. Further, by this rotation, the front case 140 becomes parallel. In rear projection, the image is projected directly behind the projector body 2. However, the present invention is not limited to this, and the mirror holding case 110 may be rotated left and right with respect to the front case 140 after being rotated so as to be parallel to the front case 140.

  In this case, in addition to the mirror turning unit 132, a turning unit for turning left and right can be installed between the mirror holding case 110 and the front case 140. Thus, during rear projection, not only can the projection be performed directly behind the projector body 2, but also the projection can be performed while changing the angle to the left and right, and the convenience of the projector 1 is further improved.

  (Modification 4) In the embodiment described above, the area of the mirror 120 accommodated in the mirror holding case 110 is approximately the same as the area of the mirror holding case 110, and the projection light from the projection lens unit 60 is excessively transmitted during rear projection. Reflects without lack. However, the present invention is not limited to this, and the area of the mirror 120 may be appropriately changed according to the outer shape of the projector main body, the position of the projection lens, and the like. Thus, an efficient mirror area corresponding to the projector can be realized.

  (Modification 5) In the above embodiment, the front position detection unit 410 and the rear position detection unit 420 constituting the position detection unit 400 are configured only in the left side case 170. However, the present invention is not limited to this, and both the left side case 170 and the right side case 160 may be configured. In this case, detection signals are output almost simultaneously at the first movement position and the second movement position, and the control unit 38 detects the detection signal within an allowable time considering chattering in the position detection unit 400. Can be used to output a signal for switching the video direction to the video direction switching unit (image processing unit 33). Thereby, for example, the projector body 2 or the mirror mechanism unit 100 is distorted due to the fall of the projector 1 or the like, so that it can be used as a detection means for malfunctions such as when proper front projection and rear projection cannot be performed. In addition, the reliability of the operation of the projector 1 can be improved.

  (Modification 6) In the above embodiment, the front position detection unit 410 and the rear position detection unit 420 constituting the position detection unit 400 are configured in the left side case 170 constituting the mirror holding housing 105. Further, the front fixing recess 211 of the front fixing portion 210 and the rear fixing recess 221 of the rear fixing portion 220 constituting the fixing portion 200 are also configured in the left side case 170. The fixing unit 230 constituting the fixing unit 200 is configured in the projector housing 10 of the projector main body 2. However, the present invention is not limited thereto, and the position detection unit 400 is configured in the projector housing 10, the front fixing recess 211 and the rear fixing recess 221 configuring the fixing unit 200 are also configured in the projector housing 10, and the fixing unit The fixing unit 230 constituting the 200 may be constituted in the left side case 170. The arrangement relationship can be appropriately determined depending on the ease of mechanism design and circuit design.

  (Modification 7) In the above-described embodiment, during rear projection, the image direction is switched and projected by the detection signal of the rear position detection unit 420 when compared with front projection. However, the screen 500 as the projection surface at the time of rear projection is a transmissive screen, and when the projected image is viewed through, it is sufficient to project the image at the front projection without switching the image direction. .

  In this case, in the initial setting in the projector main body 2, a method of setting the switching of the image direction with respect to the detection signal in the rear position detection unit 420 in the same manner as in front projection, or the input signal from the remote controller 510 in rear projection It is possible by a method such as switching appropriately. Thereby, not only a reflection type but also a transmission type can be used as the screen 500, and the convenience of the projector 1 is improved. In addition, when using the transmission type screen 500 at the time of front projection, it implement | achieves by performing operation reverse to the method mentioned above similarly.

  (Modification 8) In the above embodiment, the mirror mechanism unit 100 is mainly configured to realize rear projection. However, the present invention is not limited to this, and it may be used as a protective case for carrying the projector 1 together with realizing rear projection. In this case, the projector 1 can be protected from an external impact such as a drop by configuring the mirror holding housing 105 serving as the exterior of the mirror mechanism 100 with a metal material such as a hard plastic material or an aluminum alloy. As a result, the convenience of the projector 1 is improved.

  (Modification 9) In the above-described embodiment, the moving unit 300, the fixed unit 200, and the position detecting unit 400 are configured as a left side case 170 and a right side case 160. However, the present invention is not limited to this, and the lower case 180 may be formed. Thereby, the left side case 170 and the right side case 160 can be eliminated, and the degree of freedom of the outer shape of the projector body 2 is expanded.

  (Modification 10) In the above embodiment, the LED light source 52 is used as a light source, and white light (including light of all colors) is emitted. However, the present invention is not limited to this, and three types of LED light sources may be used so that each LED light source individually emits red, green, and blue light. Thereby, the brightness | luminance of the projection light of a projector, etc. can be improved.

  (Modification 11) In the above embodiment, the optical system has one LED light source 52 as a light emitting source, and one liquid crystal light valve 56 in a conversion unit 55. However, the present invention is not limited to this, and the light source has three types of LED light sources that individually emit red, green, and blue, and the conversion unit has three liquid crystals corresponding to the light emission of the three types of LED light sources. The optical system may be configured with a light valve (a so-called three-plate type using red, green, and blue). Thereby, the brightness | luminance of the projection light of a projector, etc. can be improved.

  (Modification 12) In the above-described embodiment, the LED light source 52 is used as a light source, and white light (including light of all colors) is emitted. However, the present invention is not limited to this, and a lamp such as a UHE (ultra-high pressure mercury lamp) lamp may be used as the light source. Thereby, the brightness | luminance of the projection light of the projector 1, etc. can be improved.

  (Modification 13) In the above-described embodiment, the configuration of the position detection unit 400, the configuration of the moving unit 300, the configuration of the fixed unit 200, and the like are not limited to the above-described embodiment, and do not change the gist of the invention. Changes and improvements may be made as appropriate.

  (Modification 14) The projector 1 in the embodiment is a transmissive liquid crystal projector. However, the present invention is not limited to this, and a projector adopting a DLP (registered trademark) (Digital Light Processing) method, a LCOS (Liquid Crystal On Silicon) method that is a reflective liquid crystal method, or the like may be used.

FIG. 1A is a schematic perspective view of a projector according to an embodiment of the present invention, FIG. 1A is a perspective view in a front projection state, and FIG. 1B is a perspective view in a rear projection state. . FIG. 2 is a schematic side view of the projector during front projection, and a cross-sectional view of the fixed unit, the moving unit, and the position detection unit. FIG. 2A is a schematic side view of the projector, and FIG. It is sectional drawing of a fixing | fixed part and a position detection part, FIG.2 (c) is sectional drawing of a moving part. FIG. 3 is a schematic side view of the projector during rear projection and a perspective view of the moving unit, FIG. 3A is a schematic side view of the projector, and FIG. 3B is a rear rotation that forms the moving unit. It is the perspective view which looked at the part from the projector main body side. It is EE sectional drawing shown to Fig.3 (a). It is a perspective view which shows a mirror rotation part. It is a circuit block diagram of a projector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Projector main body, 10 ... Projector housing, 20 ... Circuit unit, 33 ... Image processing part as video direction switching part, 34 ... LCD drive part, 38 ... Control part as position judgment part, 39 ... LED control unit 50 ... optical component unit 59 ... projection lens 60 ... projection lens unit 100 ... mirror mechanism unit 105 ... mirror holding case 110 ... mirror holding case 120 ... mirror 130 ... mirror rotation unit , 132 ... Mirror rotation unit, 133 ... Mirror holding case fixing shaft, 134 ... Front case fixing bracket, 134a ... Bracket body part, 134b ... Bracket flat part, 135 ... Rotating shaft, 140 ... Front case, 142 ... Shoulder of front case, 150 ... lower case, 160 ... right side case, 170 ... left side case, 200 ... fixed , 210 ... front fixing part, 211 ... front fixing concave part, 220 ... rear fixing part, 221 ... rear fixing concave part, 230 ... fixing unit, 235 ... fixing convex part, 300 ... moving part, 310 ... slide 312 ... slide groove, 313 ... slide groove end, 315 ... slide projection, 330 ... rear rotation unit, 332 ... rear rotation unit, 333 ... rotation shaft, 334 ... rotation unit case, 335... Rotating shaft 337. Rear rotating escape groove 338. Slide protrusion groove 338 a Slide protrusion receiving surface 400. Position detecting unit 410. Front position detecting unit 411 Micro switch 420 Rear Position detection unit, 421... Micro switch, 500... Screen, 510.

Claims (6)

A projector for projecting images,
A mirror mechanism unit that is movably connected to the projector main body of the projector and has a mirror that can rotate a mirror that reflects the projection light projected from the projection lens of the projector main body;
The mirror mechanism section and the projector body include a first movement position in which the projector body is housed in the mirror mechanism section and the projection light can be directly projected, and the mirror is rotated to a predetermined position. A projector configured to be movable to a second movement position where the projection light can be reflected by the mirror and projected. The projector according to claim 1,
The mirror mechanism section includes a mirror holding housing that constitutes an exterior of the mirror mechanism section;
A mirror rotating section for rotating the mirror;
A moving unit that moves the projector body relative to the mirror mechanism;
A projector comprising: a fixing unit that fixes the projector main body to the mirror mechanism unit. The projector according to claim 1,
When the projector main body is accommodated in the mirror mechanism unit, the mirror is disposed so as to face the upper surface of the projector main body. The projector according to claim 2,
When the projection light from the projector main body is reflected by the mirror and projected, the mirror mechanism unit causes the projection angle of the projection light from the projector main body to be a predetermined angle with respect to the mirror. A projector characterized in that the projector body is fixed by the fixing portion. The projector according to any one of claims 1 to 3,
When the mirror mechanism and the projector main body move to the second movement position, the projector is supported by the mirror mechanism and the projector main body. The projector according to any one of claims 1 to 5,
A position detection unit for detecting the position of the projector main body with respect to the mirror mechanism unit;
Based on a detection signal detected by the position detection unit, a position determination unit for determining whether the projection light from the projector body is reflected by the mirror and projected, or a position for direct projection;
And a video direction switching unit that switches a direction of the projected image based on a determination result of the position determination unit.

Images