Projection device

Abstract

The present invention provides a projection device, which can perform rotation correction suitable for each image when an image input from an external device and an OSD image rotate due to the rotation of a projection lens. The projection device (1) comprises: a housing; a projection lens (3) having a holding portion and rotatably mounted on the housing; a first rotation position detection portion (70A) and a second rotation position detection portion (70B) for detecting the rotation state of the holding portion; a DMD (22B) for outputting a composite image of a projection image output from an external device and an OSD image containing text output from an internal memory to the projection lens (3); and a control portion for performing rotation correction on the OSD image based on the detection results of the first rotation position detection portion (70A) and the second rotation position detection portion (70B) when the holding portion of the projection lens (3) rotates, and does not perform rotation correction on the projection image.

Description

[0001] This invention is a divisional application of an application with an application date of October 16, 2019, application number 201980074736.4, and invention name “Projection Device”. Technical Field

[0002] The present invention relates to a projection device, and in particular to rotation correction of an image in a projection device with a rotatable projection lens. Background Art

[0003] As a projection device (projector) for projecting images to a screen or a wall, a type in which the projection direction is fixed has been used in the past, but a projection device capable of changing the projection direction has been developed in recent years. For example, in the following patent document 1, a projection device capable of changing the projection direction by rotating a projection lens having a holding portion is described.

[0004] Patent Document 1 describes that when a projection image is rotated 180° by the rotation of a projection lens, an image processing unit displays a vertically reversed image (inverted image) on an image forming panel.

[0005] Previous technical literature

[0006] Patent Literature

[0007] Patent Document 1: WO2018 / 055964 Summary of the invention

[0008] Technical issues to be solved by the invention

[0009] According to the technology described in Patent Document 1, when the projected image is rotated 180° due to the rotation of the projection lens, image rotation correction can be performed by displaying an upside-down image (inverted image) on the image forming panel. However, Patent Document 1 does not contain any record related to the rotation correction of the image when the projected image is rotated, for example, 90° or 270° (-90°) due to the rotation of the projection lens, nor is there any record related to the rotation correction of the image when the projected image is displayed in horizontal or vertical length.

[0010] Furthermore, Patent Document 1 does not describe an OSD (On Screen Display) image that is read out from an internal memory and output, nor does it describe rotation correction that is specific to an OSD image.

[0011] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a projection device capable of performing rotation correction suitable for each image when an image input from an external device and an OSD image rotate due to the rotation of a projection lens.

[0012] Means for solving technical problems

[0013] In order to achieve the above-mentioned purpose, a projection device involved in one aspect of the present invention comprises: a housing; a projection lens, which has a holding portion and is rotatably mounted on the housing; a detection portion, which detects the rotation state of the holding portion; an image output portion, which outputs a composite image of a first image output from an external device and a second image containing text output from an internal memory to the projection lens; and a control portion, which, when the holding portion of the projection lens is rotated, performs rotation correction on the second image based on the detection result of the detection portion, and does not perform rotation correction on the first image.

[0014] According to one aspect of the present invention, when a composite image of a first image output from an external device and a second image including text output from an internal memory is output to a projection lens, in the case where the image rotates with the rotation of a holding portion of the projection lens, rotation correction can be performed on the second image without performing rotation correction on the first image. Thus, the second image projected onto the projection surface can be prevented from rotating on the projection surface.

[0015] In the projection device related to another aspect of the present invention, it is preferred that the correction angle of the rotation correction of the second image performed by the control unit is an angle that makes the text of the second image upright. Thus, the text of the second image will not become horizontal or inverted, and the text of the second image becomes easy to read.

[0016] In the projection device according to still another aspect of the present invention, it is preferable that the correction angle of the rotation correction of the second image performed by the control unit includes an angle other than 0° and 180°.

[0017] In the projection device involved in another aspect of the present invention, it is preferred that the control unit has a first correction mode and a second correction mode as correction modes for performing rotation correction on an image, and in the case of the first correction mode, the control unit performs rotation correction on the second image based on a detection result of the detection unit and does not perform rotation correction on the first image, and in the case of the second correction mode, performs different rotation corrections on the first image and the second image based on the detection result of the detection unit, and one of the first correction mode and the second correction mode is set as the correction mode through user operation.

[0018] In the projection device involved in another aspect of the present invention, it is preferred that the control unit, in the case of the second correction mode, when the first image projected by the projection lens is displayed in a vertically long vertical orientation, performs a rotation correction on the first image so that the up and down directions of the first image are oriented in a predetermined direction, and performs a rotation correction on the second image so that the text of the second image is upright.

[0019] In the projection device according to still another aspect of the present invention, it is preferable that a correction angle of rotation correction of the first image performed by the control unit is 180°.

[0020] In the projection device according to another aspect of the present invention, preferably, the image output unit includes an electro-optical element that outputs the synthesized image to the projection lens, and the control unit rotationally corrects the second image based on the detection result of the detection unit and outputs it to the electro-optical element.

[0021] A projection device according to another aspect of the present invention comprises: a housing; a projection lens having a holding portion and rotatably mounted on the housing; a detection portion that detects a rotation state of the holding portion; an image output portion that outputs a first image output from an external device to the projection lens; and a control portion that performs rotation correction on the first image based on a detection result of the detection portion, wherein when the holding portion is rotated by 90° and 270°, each first image becomes a longitudinally displayed image having a long side in the up-and-down direction, and the control portion performs 180° rotation correction on the first image when the holding portion is rotated by 90°, and does not perform rotation correction on the first image when the holding portion is rotated by 270°.

[0022] In the projection device according to another aspect of the present invention, preferably, the image output unit includes an electro-optical element that outputs the first image to the projection lens, and the control unit performs rotation correction on the first image in conjunction with the detection result of the detection unit and outputs it to the electro-optical element.

[0023] In the projection device according to still another aspect of the present invention, it is preferable that the correction angle of the rotation correction of the first image performed by the control unit includes an angle other than 0° and 180°.

[0024] A projection device according to another aspect of the present invention comprises: a housing; a projection lens having a holding portion and rotatably mounted on the housing; a detection portion that detects a rotation state of the holding portion; an image output portion that outputs a first image output from an external device to the projection lens; and a notification portion that notifies auxiliary information that assists the operation of the housing or the projection lens in changing a posture of the first image projected onto the projection surface when the posture is different on the projection surface based on a detection result of the detection portion.

[0025] In the projection device according to still another aspect of the present invention, it is preferable that the notification unit notifies a change example of the posture of the first image when changing the rotation state of the holding unit.

[0026] In the projection device according to still another aspect of the present invention, it is preferable that the auxiliary information is information indicating a rotation method of the holding portion.

[0027] In the projection device according to still another aspect of the present invention, preferably, the auxiliary information is information indicating the orientation of the casing on a plane.

[0028] In the projection device according to still another aspect of the present invention, it is preferable that the auxiliary information is information indicating whether the housing is placed horizontally or vertically.

[0029] The invention on another aspect is a projection device kit including a projection device and an information medium, wherein the projection device comprises: a housing; a projection lens having a retaining portion and rotatably mounted on the housing; and an image output portion that outputs a first image output from an external device to the projection lens, and the information medium is auxiliary information or information for accessing the auxiliary information that assists the operation of projecting the first image onto any projection surface in a desired posture.

[0030] In the projection device kit according to still another aspect of the present invention, preferably, when the rotation state of the holding portion is changed, the auxiliary information is information indicating a change example of the posture of the first image.

[0031] In the projection device kit according to still another aspect of the present invention, it is preferable that the auxiliary information is information indicating a method of rotating the holding portion.

[0032] In the projection device kit according to still another aspect of the present invention, preferably, the auxiliary information is information indicating the orientation of the housing on a plane.

[0033] In the projection device kit according to still another aspect of the present invention, preferably, the auxiliary information is information indicating whether the housing is placed horizontally or vertically.

[0034] Effects of the Invention

[0035] As described above, according to the present invention, when an image input from an external device and an OSD image are rotated by the rotation of the projection lens, rotation correction suitable for each image can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is the front view of the projection device.

[0037] Figure 2 is a rear view of the projection device.

[0038] Figure 3 It is a left side view of the projection device.

[0039] Figure 4 It is a right side view of the projection device.

[0040] Figure 5 It is a plan view (top view) of the projection device.

[0041] Figure 6 It is a bottom view (bottom view) of the projection device.

[0042] Figure 7 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0043] Figure 8 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0044] Fig. 9 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0045] Fig.10 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0046] Fig.11 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0047] Fig.12 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0048] Fig.13 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0049] Fig.14 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0050] Fig.15 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0051] Fig.16 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0052] Fig.17 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0053] Fig.18 It is a perspective view showing an example of use when the projection device main body is placed horizontally for use.

[0054] Fig.19 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0055] Fig. 20 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0056] Fig.21 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0057] Fig. 22 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0058] Fig.23 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0059] Fig.24 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0060] Fig.25 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0061] Fig.26 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0062] Fig. 27 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0063] Fig.28 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0064] Fig.29 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0065] Fig.30 It is a perspective view showing an example of use when the projection device main body is placed vertically for use.

[0066] Fig.31 It is a plan view showing a schematic internal structure of a projection device body.

[0067] Fig.32 It is a diagram showing the lens structure of a projection lens.

[0068] Fig.33 It is a perspective view showing the external structure of the lens barrel of the projection lens.

[0069] Fig.34 It is a perspective view showing the external structure of the lens barrel of the projection lens.

[0070] Fig.35 It is a cross-sectional view schematically showing the internal structure of the lens barrel of the projection lens.

[0071] Fig.36 It is an exploded perspective view showing a schematic structure of the first locking mechanism.

[0072] Fig.37 It is an exploded perspective view showing a schematic structure of the second locking mechanism.

[0073] Fig.38 It is a plan view showing the schematic structure of the first optical scale.

[0074] Fig.39 It is a plan view showing the schematic structure of the second optical scale.

[0075] Fig.40 This is a front view showing a schematic structure of the lens shift mechanism when the projection device body is placed horizontally.

[0076] Fig.41 It is a front view showing the supporting structure of the first sliding plate with respect to the base plate.

[0077] Fig.42 It is a front view showing the supporting structure of the second sliding plate with respect to the first sliding plate.

[0078] Fig.43 It is a front view showing a schematic structure of the first slide plate driving mechanism.

[0079] Fig.44 It is a front view showing a schematic structure of the second slide plate driving mechanism.

[0080] Fig.45 is a block diagram showing an embodiment of the electrical internal structure of the projection device.

[0081] Fig.46 This is a flowchart regarding the lock state of the holding portion and the control of turning on the power supply and the light source in association with the lock state.

[0082] Fig.47 This is a flowchart of the control of the locking state of the holding portion and the power on and light source on associated with the locking state (connection Fig.46 ).

[0083] Fig.48 This is a flowchart regarding locking of the holding unit.

[0084] Fig.49 This is a flowchart when the lock of the holding unit is set to be unreleaseable.

[0085] Fig.50 This is an example of a display that notifies the holding unit of the reason why the lock cannot be unlocked and the unlocking method.

[0086] Fig.51 This is a flowchart showing the procedure of control related to locking of the holding unit and projection of light.

[0087] Fig.52 This is an example of notification of the reason why the lock state cannot be set and / or a request to set the holding unit to a specific state.

[0088] Fig.53This is a flowchart related to control of disconnecting a power source and a light source in association with a rotation state and a movement state.

[0089] Fig.54 This is an example of a message displayed when there is no need to change the rotation state.

[0090] Fig.55 This is an example of a message display urging the vehicle to return to the standard state.

[0091] Fig.56 The figure shows an example of an OSD image when the power is turned off.

[0092] Fig.57 This is a flowchart related to the control of movement of the projection lens and update of information on the movement position.

[0093] Fig.58 This is a flowchart showing an embodiment of image rotation correction performed by the CPU and the display control unit.

[0094] Fig.59 The diagram shows a projection image and an OSD image when the projection lens is in lens posture No. 2.

[0095] Fig.60 The diagram shows a projection image and an OSD image when the projection lens is in lens posture No. 5.

[0096] Fig.61 The diagram shows a projection image and an OSD image when the projection lens is in lens posture No. 8.

[0097] Fig.62 The diagram shows a projection image and an OSD image when the projection lens is in lens posture No. 11.

[0098] Fig.63 This is a flowchart showing another embodiment of the rotation correction of the projected image.

[0099] Fig.64 This is a diagram summarizing the rotation correction of the rotation-corrected projection image.

[0100] Fig.65 This is a diagram showing an example of an OSD image related to the operation manual displayed by the projection device.

[0101] Fig.66 This is a diagram showing another example of the OSD image related to the operation manual displayed by the projection device.

[0102] Fig.67 It is a schematic diagram showing the displacement state of the projection device and the projection image when the projection device main body is placed horizontally and the lens posture No. is 2 to 6.

[0103] Fig.68 It is a schematic diagram showing the displacement state of the projection device and the projection image when the projection device main body is placed horizontally and the lens posture No. is 7 to 12.

[0104] Fig.69 It is a schematic diagram showing the displacement state of the projection device and the projection image when the projection device main body is placed vertically and the lens posture No. is 2 to 6.

[0105] Fig.70 It is a schematic diagram showing the displacement state of the projection device and the projection image when the projection device main body is placed vertically and the lens posture No. is 7 to 12.

[0106] Fig.71 This is a diagram related to the "lens posture" that defines the position of the projection lens relative to the projection device body.

[0107] Fig.72 This is a diagram related to the "lens posture" that defines whether the projection device body is located in front of the projection direction.

[0108] Fig.73 This is a diagram that defines the "shift correction direction" of the projected image.

[0109] Fig.74 It is a plan view of a casing of a projection device main body for explaining the shift amount of a projected image.

[0110] Fig.75A This is a graph summarizing the rotation correction and shift correction of the image when the projection device body is placed horizontally and the lens postures No. 2 to 6.

[0111] Fig.75B This is another graph summarizing the rotation correction and shift correction of the image when the projection device body is placed horizontally and the lens postures No. 2 to 6.

[0112] Fig.76A This is a graph summarizing the rotation correction and shift correction of the image when the projection device body is placed horizontally and the lens postures No. 7 to 12.

[0113] Fig.76B This is another graph summarizing the rotation correction and shift correction of the image when the projection device body is placed horizontally and the lens postures No. 7 to 12.

[0114] Fig.77A This is a graph summarizing the rotation correction and shift correction of the image when the projection device body is placed vertically and the lens postures No. 2 to 6.

[0115] Fig.77BThis is another graph summarizing the rotation correction and shift correction of the image when the projection device body is placed vertically and the lens postures No. 2 to 6.

[0116] Fig.78A This is a graph summarizing the rotation correction and shift correction of the image when the projection device body is placed vertically and the lens postures No. 7 to 12.

[0117] Fig.78B This is another graph summarizing the rotation correction and shift correction of the image when the projection device body is placed vertically and the lens postures No. 7 to 12.

[0118] Fig.79 This is a flowchart showing an embodiment of image shift correction performed by the CPU and the shift control unit. DETAILED DESCRIPTION

[0119] Hereinafter, with reference to the accompanying drawings, a method for implementing the projection device involved in the present invention will be described in detail.

[0120] [Appearance and structure of the projection device]

[0121] Figure 1 2 is a front view of the projection device 1 . Figure 2 is a rear view of the projection device 1 . Figure 3 It is a left side view of the projection device 1. Figure 4 It is a right side view of the projection device 1. Figure 5 1 is a plan view (top view) of the projection device 1 . Figure 6 It is a bottom view (bottom view) of the projection device 1 .

[0122] like Figures 1 to 6 As shown, the projection device 1 of the present embodiment includes a projection device body 2 and a projection lens 3. The projection lens 3 is configured to be rotatable around a first rotation axis θ1 and a second rotation axis θ2, and is configured to be foldable. Figure 5 The projection lens 3 is folded and the emission lens portion of the projection lens 3 faces the housing 14 (the stored state). The projection device 1 has a flat rectangular parallelepiped shape as a whole when the projection lens 3 is stored.

[0123] exist Figure 5In the figure, the projection device body 2 has a shell 14 and a recessed portion 15. The shell 14 has a shape obtained by cutting one corner portion (right front corner portion) of a rectangular parallelepiped into a rectangular shape, and has an L-shaped shape as a whole. The cut-out portion of the projection device body 2 serves as the recessed portion 15, which constitutes a storage portion for the projection lens 3. The projection lens 3 is arranged in the recessed portion 15, and is stored in the recessed portion 15 as a whole by folding. In the folded state (stored state), the front end of the projection lens 3 is arranged opposite to the inner wall surface 15A on the front side of the recessed portion 15. The inner wall surface 15A on the front side of the recessed portion 15 is provided with a recessed portion 15a, which stores the output lens portion protruding from the front end of the projection lens 3.

[0124] The projection lens 3 rotates around two axes (a first rotation axis θ1 and a second rotation axis θ2) that are orthogonal to each other, and the projection direction is switched. Thus, projection can be performed in various directions without moving the projection device body 2.

[0125] The projection lens 3 has a lens cover 18 at its front end. By folding the projection lens 3, the lens cover 18 complements the cut corner portion of the projection device body 2. That is, the lens cover front portion 18A, the lens cover right side portion 18D, the lens cover upper surface portion 18E and the lens cover bottom surface portion 18F thereof are respectively located on substantially the same plane as the housing front portion 14A, the housing right side portion 14D, the housing upper surface portion 14E and the housing bottom surface portion 14F of the projection device body 2, and together with the projection device body 2, form a flat rectangular parallelepiped shape.

[0126] The projection device body 2 has a main body operation unit 6 on the housing front portion 14A. The main body operation unit 6 includes various operation switches such as a power switch 6A, a MENU key 6B, a cross key 6C, an ENTER key 6D, and a BACK key 6E.

[0127] The right side surface 14D of the housing of the projection device main body 2 is provided with an air supply portion 7 consisting of a plurality of punched holes. In addition, the left side surface 14C of the housing of the projection device main body 2 is provided with an exhaust portion 8 consisting of a plurality of punched holes. The projection device main body 2 takes in air from the air supply portion 7 for cooling the internal equipment (light source, etc.), passes the air inside, and is exhausted from the exhaust portion 8.

[0128] In addition, a power connector 9 and an image input terminal 10 are provided on the right side surface 14D of the housing of the projection device main body 2. The projection device 1 is supplied with power from the outside via a power cable (not shown) connected to the power connector 9. In addition, the projection device 1 is supplied with an image signal from an external device (for example, a personal computer, etc.) via a cable (not shown) connected to the image input terminal 10.

[0129] The projection lens 3 is provided with a locking mechanism 60 for independently locking the rotation around the first rotation axis θ1 and the rotation around the second rotation axis. The details of the locking mechanism 60 will be described later. The projection lens 3 is usually locked by the locking mechanism for rotating around the first rotation axis θ1 and the second rotation axis. The projection lens 3 is provided with a lock release operation portion 11 for releasing the lock of the rotation around the first rotation axis θ1 and the second rotation axis.

[0130] The lock release operation unit 11 includes a first lock release switch 11A and a second lock release switch 11B. The first lock release switch 11A releases the lock of the rotation around the first rotation axis θ1. The first lock release switch 11A is composed of a button having a circular shape, and an LED (light emitting diode) is provided on the key top. When the first lock release switch 11A is pressed, the lock of the rotation around the first rotation axis θ1 of the projection lens 3 is released for a certain period (for example, 10 seconds). Therefore, during this period, the projection lens 3 is freely rotated around the first rotation axis θ1. The second lock release switch 11B releases the lock of the rotation around the second rotation axis θ2 of the projection lens 3. The second lock release switch 11B is composed of a square button, and an LED is provided on the key top. By pressing the second lock release switch 11B, the lock of the rotation around the second rotation axis θ2 of the projection lens 3 is released for a certain period (for example, 10 seconds). Therefore, during this period, the projection lens 3 is freely rotated around the second rotation axis θ2.

[0131] The projection device 1 of this embodiment can place the projection device body 2 horizontally or vertically. Figure 6 As shown, the housing bottom portion 14F of the projection device main body 2 is provided with horizontal leg portions 12 at three locations, which serve as grounding portions when the projection device main body 2 is placed horizontally. In addition, the housing back portion 14B of the projection device main body 2 is provided with vertical leg portions 13 at four locations, which serve as grounding portions when the projection device main body 2 is placed vertically.

[0132] Figure 7 to Figure 18 1 is a perspective view showing an example of using the projection device body when it is placed horizontally. Figure 1 The rotation direction of the second rotation axis θ2 is based on the image when viewed from the front side 14A of the housing. Figure 4 The reference is when viewed from the right side surface 14D of the housing. In addition, "horizontally" refers to the case where the largest surface of the housing 14 (in this embodiment, the housing bottom surface 14F or the housing upper surface 14E) intersects with the direction of gravity.

[0133] Figure 7 The figure shows the storage state when the projection device body 2 is placed horizontally. As shown in the figure, in the storage state, the projection lens 3 is accommodated in the recessed portion 15 of the projection device body 2.

[0134] Figure 8 The first usage mode is shown when the projection device body 2 is placed horizontally and projects backward. This mode is achieved by rotating the projection lens 3 90 degrees counterclockwise around the first rotation axis θ1 from the stored state. In this mode, the image is projected from the upper side of the projection device body 2 toward the rear.

[0135] Fig. 9 The second usage mode is shown when the projection device body 2 is placed horizontally and projects backward. This mode is achieved by rotating the projection lens 3 90 degrees clockwise around the first rotation axis θ1 from the stored state. In this mode, the image is projected from the bottom side of the projection device body 2 toward the rear.

[0136] Fig.10 The first usage mode is shown when the projection device body 2 is placed horizontally and projects to the right side. This mode is achieved by rotating the projection lens 3 90° counterclockwise around the first rotation axis θ1 and 90° clockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the upper side of the projection device body 2 toward the right side.

[0137] Fig.11 The second usage mode is shown when the projection device body 2 is placed horizontally and projected to the right side. This mode is achieved by rotating the projection lens 3 from the storage state by 90° clockwise around the first rotation axis θ1 and by 90° counterclockwise around the second rotation axis θ2. In this mode, an image is projected from the lower side of the projection device body 2 to the right side.

[0138] Fig.12 The first usage mode is shown when the projection device body 2 is placed horizontally and projects to the left side. This mode is achieved by rotating the projection lens 3 90° counterclockwise around the first rotation axis θ1 and 90° counterclockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the upper side of the projection device body 2 to the left side.

[0139] Fig.13 The second usage mode is shown when the projection device body 2 is placed horizontally and projects to the left side. This mode is achieved by rotating the projection lens 3 90° clockwise around the first rotation axis θ1 and 90° clockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the lower side of the projection device body 2 to the left side.

[0140] Fig.14The first usage mode is shown when the projection device body 2 is placed horizontally and projects forward. This mode is achieved by rotating the projection lens 3 from the storage state by 90° counterclockwise around the first rotation axis θ1 and by 180° clockwise or counterclockwise around the second rotation axis θ2. In this mode, an image is projected from the upper side of the projection device body 2 toward the front.

[0141] Fig.15 The second usage mode is shown when the projection device body 2 is placed horizontally and projects forward. This mode is achieved by rotating the projection lens 3 from the storage state by 90° clockwise around the first rotation axis θ1 and by 180° clockwise or counterclockwise around the second rotation axis θ2. In this mode, an image is projected from the lower side of the projection device body 2 toward the front.

[0142] Fig.16 The third usage mode is shown when the projection device body 2 is placed horizontally and projects forward. This mode is achieved by rotating the projection lens 3 180° clockwise or counterclockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected forward from the housing front portion 14A of the projection device body 2.

[0143] Fig.17 This shows a usage mode when the projection device body 2 is placed horizontally and projects upward. This mode is achieved by rotating the projection lens 3 90° counterclockwise around the second rotation axis θ2 from the stored state. In this mode, an image is projected upward from the housing upper surface 14E of the projection device body 2.

[0144] Fig.18 This shows a method of using the projection device body 2 when it is placed horizontally and projecting downward. This method is achieved by rotating the projection lens 3 90 degrees clockwise around the second rotation axis θ2 from the stored state. In this method, an image is projected downward from the housing bottom surface 14F of the projection device body 2.

[0145] Figure 19 to Figure 30 It is a perspective view showing an example of using the projection device body when placed vertically. In addition, "placed vertically" means that the largest surface of the housing 14 (in this embodiment, the housing bottom surface 14F or the housing upper surface 14E) is substantially parallel to the direction of gravity.

[0146] When the projection device is placed vertically, the housing back surface 14B of the projection device body 2 is placed downward, and the housing right side surface 14D is placed forward.

[0147] Fig.19 The figure shows the storage state when the projection device body 2 is placed vertically. As shown in the figure, in the storage state, the projection lens 3 is accommodated in the recessed portion 15 of the projection device body 2.

[0148] Fig. 20 The first usage mode is shown when the projection device body 2 is placed vertically and projects downward. This mode is achieved by rotating the projection lens 3 90 degrees counterclockwise around the first rotation axis θ1 from the stored state. In this mode, an image is projected downward from the right side of the projection device body 2.

[0149] Fig.21 The second usage mode is shown when the projection device body 2 is placed vertically and projects downward. This mode is achieved by rotating the projection lens 3 90 degrees clockwise around the first rotation axis θ1 from the stored state. In this mode, an image is projected downward from the left side of the projection device body 2.

[0150] Fig. 22 The first usage mode is shown when the projection device body 2 is placed vertically and projects forward. This mode is achieved by rotating the projection lens 3 from the storage state by 90° counterclockwise around the first rotation axis θ1 and by 90° clockwise around the second rotation axis θ2. In this mode, an image is projected from the right side of the projection device body 2 toward the front.

[0151] Fig.23 The second usage mode is shown when the projection device body 2 is placed vertically and projects forward. This mode is achieved by rotating the projection lens 3 90° clockwise around the first rotation axis θ1 and 90° counterclockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the left side of the projection device body 2 toward the front.

[0152] Fig.24 The first usage mode is shown when the projection device body 2 is placed vertically and projects backward. This mode is achieved by rotating the projection lens 3 90° counterclockwise around the first rotation axis θ1 and 90° counterclockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the right side of the projection device body 2 toward the rear.

[0153] Fig.25 The second usage mode is shown when the projection device body 2 is placed vertically and projects backward. This mode is achieved by rotating the projection lens 3 90° clockwise around the first rotation axis θ1 and 90° clockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected from the left side of the projection device body 2 toward the rear.

[0154] Fig.26 The first usage mode is shown when the projection device body 2 is placed vertically and projects upward. This mode is achieved by rotating the projection lens 3 from the storage state by 90° counterclockwise around the first rotation axis θ1 and by 180° clockwise or counterclockwise around the second rotation axis θ2. In this mode, an image is projected upward from the right side of the projection device body 2.

[0155] Fig. 27 The second usage mode is shown when the projection device body 2 is placed vertically and projects upward. This mode is achieved by rotating the projection lens 3 from the storage state by 90° clockwise around the first rotation axis θ1 and by 180° clockwise or counterclockwise around the second rotation axis θ2. In this mode, an image is projected upward from the left side of the projection device body 2.

[0156] Fig.28 The third usage mode is shown when the projection device body 2 is placed vertically and projects upward. This mode is achieved by rotating the projection lens 3 180° clockwise or counterclockwise around the second rotation axis θ2 from the storage state. In this mode, an image is projected upward from the housing front portion 14A of the projection device body 2 facing upward.

[0157] Fig.29 The method of using the projection device body 2 when it is placed vertically and projecting to the right side is shown. This method is achieved by rotating the projection lens 3 90 degrees counterclockwise around the second rotation axis θ2 from the storage state. In this method, an image is projected from the housing upper surface portion 14E of the projection device body 2 facing the right side toward the right side.

[0158] Fig.30 The method of using the projection device body 2 when it is placed vertically and projecting to the left side is shown. This method is achieved by rotating the projection lens 3 90° clockwise around the second rotation axis θ2 from the storage state. In this method, an image is projected from the housing bottom surface 14F of the projection device body 2 facing the left side to the left side.

[0159] [Internal structure of the projection device body]

[0160] Fig.31 It is a plan view showing a schematic internal structure of a projection device body.

[0161] As shown in the figure, the projection apparatus main body 2 includes a light source unit 20 , an illumination unit 21 , an image display unit 22 , a main body posture detection unit 23 , and a lens shift mechanism 80 therein.

[0162] The light source unit 20 includes a laser light source 20A, a phosphor wheel 20B, a reflector 20C, and a color wheel 20D. The laser light source 20A emits blue laser light. The light source unit 20 generates three-color lights of red, green, and blue (or four-color lights of red, green, blue, and yellow) from the blue laser light emitted from the laser light source 20A through the phosphor wheel 20B and the color wheel 20D, and emits them in time division.

[0163] The illumination unit 21 includes a rod integrator 21A, a lens 21B, a lens 21C, a lens 21D, a reflector 21E, and a reflector 21F. Light emitted from the color wheel 20D of the light source unit 20 is incident on the rod integrator 21A. The rod integrator 21A makes the light emitted from the light source unit 20 uniform. The light emitted from the rod integrator 21A is relayed by the lens 21B, the lens 21C, and the lens 21D, and is incident on the image display unit 22 via the reflector 21E and the reflector 21F.

[0164] The image display unit 22 receives the light emitted from the illumination unit 21 to generate an image. The image display unit 22 includes a total reflection prism 22A and a DMD (Digital Micromirror Device (registered trademark)) 22B. The total reflection prism 22A guides the light incident from the illumination unit 21 to the DMD 22B. The DMD 22B is a light modulator that performs time-sharing modulation on the light of each color component incident through the total reflection prism 22A. The DMD 22B has a plurality of micro-mirrors that can switch the reflection direction, and modulates the incident light by changing the angle of each micro-mirror according to the image signal. The light modulated by the DMD 22B is guided to the projection lens 3 through the total reflection prism 22A.

[0165] The main body posture detection unit 23 detects the posture (horizontally, vertically, etc.) of the projection device main body 2. The main body posture detection unit 23 is, for example, composed of an acceleration sensor that measures the inclination angle of the projection device main body 2 relative to the gravity direction. In addition, the main body posture detection unit 23 can also be a sensor that detects the horizontal and vertical positions of the projection device main body 2.

[0166] The lens shift mechanism 80 moves the projection lens 3 relative to the projection device body 2 to shift the optical axis of the projection lens 3. The lens shift mechanism 80 is arranged inside the inner wall surface 15A on the front side of the recessed portion 15 of the projection device body 2. The details of the lens shift mechanism 80 will be described later.

[0167] [Structure of projection lens]

[0168] (Lens structure of projection lens)

[0169] Fig.32 It is a diagram showing the lens structure of a projection lens.

[0170] The projection lens 3 magnifies the image formed by the DMD 22B and projects it onto the projection object surface. The projection lens 3 is substantially composed of the first optical system G1, the second optical system G2 and the third optical system G3. The projection lens 3 has a zoom function and a focusing function. In addition, the lenses constituting each optical system can be one or more.

[0171] The first optical system G1 forms an image generated by the DMD22B as an intermediate image. The first optical system G1 is located between the main body (housing) of the projection device 1 and the second optical system G2 in the optical path. The first optical system G1 is substantially composed of the first optical system first lens group G11, the first optical system second lens group G12, the first optical system third lens group G13, the first optical system fourth lens group G14 and the first reflector R1. The first optical system first lens group G11, the first optical system second lens group G12, the first optical system third lens group G13 and the first optical system fourth lens group G14 are arranged along the first optical axis Z1 perpendicular to the display surface of the DMD22B. The first optical system first lens group G11 is a fixed lens group, and the first optical system second lens group G12, the first optical system third lens group G13 and the first optical system fourth lens group G14 are lens groups that move when zooming. The first optical system second lens group G12 and the first optical system third lens group G13 move as a whole when zooming. Each lens group is composed of at least one lens.

[0172] The first reflector R1 is disposed on the first optical axis Z1 to bend the optical path into a right angle, and the optical axis of the bent optical path is set as the second optical axis Z2.

[0173] The second optical system G2 enlarges the intermediate image formed by the first optical system G1. It is projected onto the projection object surface (for example, a screen, a wall, a ceiling, a floor, etc.). The second optical system G2 is essentially composed of the second optical system first lens group G21, the second optical system second lens group G22 and the second reflector R2. The second optical system first lens group G21, the second optical system second lens group G22 and the second reflector R2 are arranged along the second optical axis Z2. The second reflector R2 bends the optical path of the second optical system G2 into a right angle. The optical axis of the bent optical path is set to the third optical axis Z3. The second optical system first lens group G21 and the second optical system second lens group G22 are fixed lens groups.

[0174] The third optical system G3 projects the image magnified by the second optical system G2 onto the projection object surface. The third optical system G3 is substantially composed of the third optical system first lens group G31, the third optical system second lens group G32 and the third optical system third lens group G33. The third optical system first lens group G31, the third optical system second lens group G32 and the third optical system third lens group G33 are arranged along the third optical axis Z3. The third optical system first lens group G31 and the third optical system third lens group G33 are fixed lens groups, and the third optical system second lens group G32 is a lens group that moves when focusing. Each lens group is composed of at least one lens.

[0175] The projection lens 3 uses the first optical axis Z1 as the first rotation axis θ1, and the first reflector R1 and the second optical system G2 partially rotate. In addition, the projection lens 3 uses the second optical axis Z2 as the second rotation axis θ2, and the second optical system second lens group G22, the second reflector R2, the third optical system first lens group G31, the third optical system second lens group G32, and the third optical system third lens group G33 partially rotate.

[0176] (Lens barrel of projection lens)

[0177] Fig.33 and Fig.34 : is a stereogram showing the external structure of the lens barrel of the projection lens. Fig.35 It is a cross-sectional view schematically showing the internal structure of the lens barrel of the projection lens.

[0178] exist Fig.33 In the figure, the lens barrel 30 of the projection lens 3 has a first holding portion 31, a second holding portion 40, and a third holding portion 50. The first optical system first lens group G11, the first optical system second lens group G12, the first optical system third lens group G13, and the first optical system fourth lens group G14 are accommodated in the first holding portion 31. The first reflecting mirror R1 and the second optical system first lens group G21 are accommodated in the second holding portion 40. The second optical system second lens group G22, the second reflecting mirror R2, the third optical system first lens group G31, the third optical system second lens group G32, and the third optical system third lens group G33 are accommodated in the third holding portion 50. That is, the first to third holding portions 31, 40, and 50 hold various optical components.

[0179] exist Fig.35 In the figure, the first holding portion 31 includes a fixed frame 32 , a cam frame 33 , a first lens holding frame 34 , a second lens holding frame 35 , a third lens holding frame 36 , and a zoom gear frame 37 .

[0180] exist Fig.34 In the embodiment, the fixed frame 32 has a flange portion 32A on its outer periphery. The flange portion 32A functions as a connection portion (mounting portion) connected to the projection device body 2. The projection lens 3 is mounted on the projection device body 2 via the flange portion 32A. At this time, the flange portion 32A of the projection lens 3 is connected to the lens shift mechanism 80 provided in the projection device body 2. The fixed frame 32 has a straight groove 32B along the first optical axis Z1. The straight grooves 32B are arranged at equal intervals at three locations in the circumferential direction.

[0181] The cam frame 33 is radially fitted with the inner circumference of the fixed frame 32 and is rotatably held on the fixed frame 32. The cam frame 33 includes a first cam groove 33A and a second cam groove 33B. The first cam groove 33A and the second cam groove 33B are arranged at equal intervals at three locations in the circumferential direction.

[0182] The first lens holding frame 34 holds the first optical system first lens group G11. The first lens holding frame 34 is connected to the rear end of the fixed frame 32 and is integrally fixed to the fixed frame 32. Thus, the first optical system first lens group G11 is fixedly held at a fixed position.

[0183] The second lens holding frame 35 holds the second lens group G12 of the first optical system and the third lens group G13 of the first optical system. The second lens holding frame 35 is radially fitted with the inner periphery of the cam frame 33 and is held so as to be freely movable forward and backward along the first optical axis Z1 on the inner periphery of the cam frame 33. On the second lens holding frame 35, a first cam pin 35A is provided on its outer periphery. The first cam pins 35A are arranged at three locations in the circumferential direction at equal intervals. The first cam pins 35A are embedded in the first cam groove 33A of the cam frame 33 and the straight groove 32B of the fixed frame 32. Thus, when the cam frame 33 is rotated, the second lens holding frame 35 moves forward and backward along the first optical axis Z1. As a result, the second lens group G12 of the first optical system and the third lens group G13 of the first optical system move forward and backward along the first optical axis Z1 as a whole. Thus, the field of view (zoom ratio) of the projected image is adjusted.

[0184] The third lens holding frame 36 holds the fourth lens group G14 of the first optical system. The third lens holding frame 36 is radially fitted with the inner periphery of the cam frame 33, and is held so as to be freely movable forward and backward along the first optical axis Z1 on the inner periphery of the cam frame 33. On the third lens holding frame 36, second cam pins 35B are provided on its outer periphery. The second cam pins 35B are arranged at three locations in the circumferential direction at equal intervals. The second cam pins 35B are embedded in the second cam groove 33B of the cam frame 33 and the straight groove 32B of the fixed frame 32. Therefore, when the cam frame 33 is rotated, the third lens holding frame 36 moves forward and backward along the first optical axis Z1. As a result, the fourth lens group G14 of the first optical system moves forward and backward along the first optical axis Z1.

[0185] The zoom gear frame 37 is radially fitted with the outer peripheral portion of the fixed frame 32 and is rotatably held on the fixed frame 32. The zoom gear frame 37 has a gear portion 37A on its outer periphery. The zoom gear frame 37 is connected to the cam frame 33. Therefore, when the zoom gear frame 37 is rotated, the cam frame 33 is rotated.

[0186] A zoom drive gear 38A connected to the zoom motor 38 meshes with the gear portion 37A of the zoom gear frame 37. Fig.33 As shown, the zoom motor 38 is mounted on the fixed frame 32 via a bracket 38B.

[0187] exist Fig.34 When the zoom motor 38 is driven, the zoom gear frame 37 rotates. The cam frame 33 rotates in conjunction with the rotation of the zoom gear frame 37. The second lens holding frame 35 and the third lens holding frame 36 move along the first optical axis Z1 through the rotation of the cam frame 33. As a result, the first optical system second lens group G12, the first optical system third lens group G13, and the first optical system fourth lens group G14 move along the first optical axis Z1 to adjust the field angle (zoom ratio) of the projected image.

[0188] The second holding portion 40 includes a first rotating frame 41, a first reflector holding frame 42, and a lens holding frame 43. The second holding portion 40 is held so as to be rotatable with respect to the first holding portion 31 about the first optical axis Z1 (=first rotating axis θ1). In addition, in this embodiment, the first holding portion 31 is fixed to the housing 14, but the first holding portion 31 and the second holding portion 40 may be connected so that the first holding portion 31 can also rotate relative to the housing 14.

[0189] exist Fig.35 In the embodiment, the first rotating frame 41 is radially engaged with the outer periphery of the fixed frame 32 of the first holding portion 31, and is held on the fixed frame 32 so as to be rotatable. The outer periphery of the fixed frame 32 is provided with first support rollers 32C as a rotating portion. The first support rollers 32C are arranged at equal intervals at three locations in the circumferential direction. The first rotating frame 41 is provided with first guide grooves 41A for the first support rollers 32C to be inserted. The first guide grooves 41A are arranged along the circumferential direction. The first rotating frame 41 is held so as to be rotatable relative to the fixed frame 32 by the first support rollers 32C moving along the first guide grooves 41A.

[0190] The first reflector holding frame 42 holds the first reflector R1. The first reflector holding frame 42 has a structure bent at a right angle, is connected to the first rotating frame 41, and is integrally fixed to the first rotating frame 41.

[0191] The lens holding frame 43 holds the second optical system first lens group G21. The lens holding frame 43 is connected to the first reflector holding frame 42 and fixed integrally to the first reflector holding frame 42. The lens holding frame 43 fixed to the first reflector holding frame 42 is arranged at a right angle to the first rotating frame 41.

[0192] The third holding portion 50 includes a second rotating frame 51, a second reflecting mirror holding frame 52, a spiral frame 53, a final lens holding frame 54, a focusing lens holding frame 55, and a focusing gear frame 56. The third holding portion 50 is held relative to the second holding portion 40 so as to be rotatable around the second optical axis Z2 (= second rotating axis θ2).

[0193] The second rotating frame 51 holds the second lens group G22 of the second optical system. The second rotating frame 51 is radially fitted with the inner circumference of the lens holding frame 43 of the second holding portion 40, and is rotatably held on the lens holding frame 43. On the outer circumference of the second rotating frame 51, there is a second support roller 51A as a rotating portion. The second support rollers 51A are arranged at equal intervals at three locations in the circumferential direction. The lens holding frame 43 is provided with a second guide groove 43A for the second support roller 51A to be embedded. The second guide groove 43A is arranged along the circumferential direction. By moving the second support roller 51A along the second guide groove 43A, the second rotating frame 51 is held to be rotatable relative to the lens holding frame 43.

[0194] The second mirror holding frame 52 holds the second mirror R2 and the third optical system first lens group G31. The first mirror holding frame 42 has a structure bent at a right angle, is connected to the second rotating frame 51, and is integrally fixed to the second rotating frame 51.

[0195] The spiral frame 53 is connected to the second mirror holding frame 52 and integrally fixed to the second mirror holding frame 52. The spiral frame 53 fixed to the second mirror holding frame 52 is arranged at a right angle to the second rotating frame 51. The spiral frame 53 has a female thread portion 53A at the inner circumference of its front end.

[0196] The final lens holding frame 54 holds the third lens group G33 of the third optical system as the final lens. The final lens holding frame 54 is connected to the front end of the spiral frame 53 and is fixed to the spiral frame 53 as a whole.

[0197] The focusing lens holding frame 55 holds the second lens group G32 of the third optical system. The focusing lens holding frame 55 has a male threaded portion 55A at the outer periphery of its front end. The focusing lens holding frame 55 is arranged at the inner periphery of the spiral frame 53 by threading the male threaded portion 55A with the female threaded portion 53A of the spiral frame 53. The focusing lens holding frame 55 rotates and moves forward and backward along the third optical axis Z3 under the action of the male threaded portion 55A and the female threaded portion 53A. As a result, the second lens group G32 of the third optical system moves forward and backward along the third optical axis Z3.

[0198] The focus gear frame 56 is radially fitted with the outer periphery of the spiral frame 53 and is rotatably held on the spiral frame 53. The focus gear frame 56 has a gear portion 56A on its outer periphery. The focus gear frame 56 is connected to the focus lens holding frame 55 via a connecting pin 55B provided on the outer periphery of the focus lens holding frame 55. Therefore, when the focus gear frame 56 is rotated, the focus lens holding frame 55 is rotated.

[0199] A focus driving gear 58A connected to a focus motor 58 meshes with a gear portion 56A of the focus gear frame 56. Fig.34 As shown, the focus motor 58 is mounted on the second mirror holding frame 52 via a bracket 58B.

[0200] exist Fig.34 When the focus motor 58 is driven, the focus gear frame 56 rotates. The focus lens holding frame 55 rotates in conjunction with the rotation of the focus gear frame 56. As a result, the focus lens holding frame 55 moves while rotating along the third optical axis Z3. As a result, the second lens group G32 of the third optical system moves along the third optical axis Z3 to adjust the focus.

[0201] In the lens barrel 30 having the above structure, the second holding portion 40 rotates about the first optical axis Z1 (=first rotation axis θ1) relative to the first holding portion 31. In addition, the third holding portion 50 rotates about the second optical axis Z2 (=second rotation axis θ2) relative to the second holding portion 40.

[0202] (Projection lens locking mechanism)

[0203] As described above, the projection lens 3 is provided with a locking mechanism 60 that independently locks the rotation about the first rotation axis θ1 and the rotation about the second rotation axis. The locking mechanism 60 includes a first locking mechanism 60A that locks the rotation of the second holding portion 40 relative to the first holding portion 31 and locks the rotation of the projection lens 3 about the first rotation axis θ1. In addition, the locking mechanism 60 includes a second locking mechanism 60B that locks the rotation of the third holding portion 50 relative to the second holding portion 40 and locks the rotation of the projection lens 3 about the second rotation axis θ2.

[0204] <First locking mechanism>

[0205] The first locking mechanism 60A locks the rotation of the second holding portion 40 at three positions. The three positions are positions of the stored state (see Figure 7 and Fig.19 ), rotate 90° counterclockwise from the stored position (refer to Figure 8 and Fig. 20 ), and rotate 90° clockwise from the stored state (refer to Fig.10 and Fig.21 ) at each position.

[0206] Fig.36 It is an exploded perspective view showing a schematic structure of the first locking mechanism.

[0207] As shown in the figure, a claw guide groove 32D is provided along the circumferential direction on the outer circumference of the fixing frame 32 of the first holding portion 31. The claw guide groove 32D is provided with first locking grooves 32E at three locations in the circumferential direction. Each first locking groove 32E is composed of a groove extending from the claw guide groove 32D along the first optical axis Z1, and is arranged at equal intervals (90° intervals).

[0208] The first locking claw 61A is formed of an integrally formed metal plate, and includes a rectangular flat plate-shaped first locking claw body 62A, an arm portion 63A extending from the first locking claw body 62A in the longitudinal direction, a hook-shaped claw portion 64A provided at the front end of the arm portion 63A, and a connecting portion 65A connected to the plunger 68a of the first solenoid 68A. The first locking claw body 62A is provided with long holes 66A at two locations for mounting on the lens barrel 30.

[0209] like Fig.33 and Fig.34 As shown, the first locking claw 61A is slidably mounted on the first mirror holding frame 42 of the second holding portion 40 via two screws 67A. The first locking claw 61A mounted on the first mirror holding frame 42 is supported to slide freely along the first optical axis Z1. In addition, the first locking claw 61A mounted on the first mirror holding frame 42 has its claw portion 64A embedded in the claw portion guide groove 32D. The first locking claw 61A slides at the position of the claw portion guide groove 32D, and the claw portion 64A is engaged with the claw portion guide groove 32D, thereby locking the second holding portion 40.

[0210] The first locking claw 61A is driven to slide by the first solenoid 68A. The first solenoid 68A is mounted on the first mirror holding frame 42 of the second holding portion 40 via a bracket. The first solenoid 68A has a plunger 68a urged in a protruding direction. When the first solenoid 68A is energized (turned on), the plunger 68a retreats against the urging force.

[0211] The front end portion of the plunger 68a of the first solenoid 68A is connected to the connecting portion 65A of the first locking claw 61A. The first locking claw 61A connected to the first solenoid 68A slides by turning the first solenoid 68A on and off. That is, by turning on (energizing) the first solenoid 68A, the plunger 68a overcomes the force and retreats. As a result, the first locking claw 61A slides. The sliding direction at this time is the direction in which the claw portion 64A retreats from the first locking groove portion 32E. When the first solenoid 68A is turned on, the claw portion 64A retreats from the first locking groove portion 32E and moves toward the claw portion guide groove 32D. As a result, the second retaining portion 40 can rotate.

[0212] On the other hand, by disconnecting the first solenoid 68A, the plunger 68a protrudes due to the force. As a result, the first locking claw 61A slides. The sliding direction at this time is the direction toward the first locking groove 32E. Therefore, when the first solenoid 68A is disconnected at a position where the position of the claw 64A coincides with the position of the first locking groove 32E, the claw 64A is embedded in the first locking groove 32E, and the rotation of the second holding portion 40 is locked. In other words, the rotation around the first rotation axis θ1 is locked.

[0213] Furthermore, when the claw 64A disconnects the first solenoid 68A at a position other than the position of the first locking groove 32E, the claw 64A is pressed against the inner wall surface of the claw guide groove 32D by the force of the plunger 68a. In this case, when the second holding portion 40 is rotated to a position where the position of the claw 64A coincides with the position of the first locking groove 32E, the claw 64A is embedded in the first locking groove 32E by the force of the plunger 68a, and the rotation of the second holding portion 40 is locked. That is, the rotation around the first rotation axis θ1 is locked.

[0214] Thus, the first lock mechanism 60A causes the claw portion 64A of the first lock claw 61A to move forward and backward by turning the first solenoid 68A on and off, thereby locking and unlocking the rotation of the second holding portion 40. In other words, the rotation about the first rotation axis θ1 is locked and unlocked.

[0215] The first solenoid 68A is turned on and off by the first unlock switch 11A. When the first unlock switch 11A is pressed once, the first solenoid 68A is turned on for a certain period of time. Therefore, when the first unlock switch 11A is pressed once, the lock is released for a certain period of time.

[0216] <Second locking mechanism>

[0217] The second locking mechanism 60B locks the rotation of the third holding portion 50 at four positions. The four positions are positions at intervals of 90° with respect to the position of the stored state.

[0218] Fig.37 It is an exploded perspective view showing a schematic structure of the second locking mechanism.

[0219] As shown in the figure, a claw guide groove 51B is provided along the circumferential direction on the outer periphery of the second rotating frame 51 of the third holding portion 50. Second locking grooves 51C are provided at four locations in the claw guide groove 51B in the circumferential direction. Each second locking groove 51C is composed of a groove extending from the claw guide groove 51B along the second optical axis Z2, and is arranged at equal intervals (90° intervals).

[0220] The second locking claw 61B is formed of an integrally formed metal plate, and has a second locking claw body 62B in the shape of a rectangular flat plate, a hook-shaped claw portion 64B provided on the second locking claw body 62B, and a connecting portion 65B connected to the plunger 68b of the second solenoid 68B. The second locking claw body 62B has long holes 66B at two locations for mounting on the lens barrel 30. Fig.33 and Fig.34 As shown, the second locking claw 61B is slidably mounted on the lens holding frame 43 of the second holding portion 40 via two screws 67B. In addition, the second locking claw 61B mounted on the lens holding frame 43 has its claw portion 64B inserted into the claw portion guide groove 51B. The detailed method of locking and unlocking the rotation axis is substantially the same as that of the first locking mechanism.

[0221] (Rotational position detection unit)

[0222] exist Fig.35 In the projection lens 3 , a first rotational position detection unit 70A for detecting the rotational position of the second holding unit 40 relative to the first holding unit 31 and a second rotational position detection unit 70B for detecting the rotational position of the third holding unit 50 relative to the second holding unit 40 are provided.

[0223] <First rotation position detection unit>

[0224] The first rotation position detection unit 70A detects seven rotation positions (including the rotation range) of 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, 135° to 180°, and 180° as the rotation position of the second holding unit 40. In addition, the rotation position can be detected in a smaller range. For example, 45° and 135° can also be detected independently.

[0225] The first rotational position detection unit 70A is composed of a so-called optical absolute encoder, and includes a first optical scale 71A to which different symbols are assigned according to the rotational position, and a first reading sensor 72A for reading the first optical scale 71A.

[0226] The first optical scale 71A is arranged along the circumferential direction on the outer periphery of the fixed frame 32 of the first retaining portion 31. Fig.38 It is a plan view showing the schematic structure of the first optical scale. The first optical scale 71A is formed by a reflective portion ( Fig.38 The white part of the Fig.38 In this example, 3-bit symbols are assigned according to the rotation position through 3 tracks.

[0227] The first reading sensor 72A is disposed on the first rotating frame 41 of the second holding portion 40, and is arranged opposite to the first optical scale 71A. The first reading sensor 72A has a structure in which a light source and a light sensor are arranged in a row, and light is irradiated from the light source to the first optical scale 71A, and the light sensor receives the reflected light to read the first optical scale 71A. More specifically, the on / off of the light is detected, and a signal corresponding to the on / off is output. The output signal becomes a signal corresponding to the rotation position of the second holding portion 40.

[0228] The second holding portion 40 is rotated within the range of 90° counterclockwise and 90° clockwise based on the stored state. Figure 7 and Fig.19 ), rotate 90° counterclockwise from the stored position (refer to Figure 8 and Fig. 20 ), and rotate 90° clockwise from the stored state (refer to Fig. 9 and Fig.21 ) is locked in each position. The first rotation position detection unit 70A rotates the second holding unit 40 counterclockwise by 90° from the stored state (refer to Figure 8 and Fig. 20 ) is set to 0°, and the rotation direction of the first holding portion 40 is set to the positive rotation direction from the 0° position clockwise. Therefore, in the position of the storage state (refer to Figure 7 and Fig.19 ) is detected as 90°, and when it is rotated 90° clockwise from the storage state (refer to Fig. 9 and Fig.21 ) detection is 180°.

[0229] <Second Rotational Position Detection Section>

[0230] As the rotational position of the third holding portion 50, the second rotational position detection portion 70B detects twelve rotational positions (including the rotational range) of 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, 135° to 180°, 180°, 180° to 225°, 225° to 270°, 270°, 270° to 315°, and 315° to 360°. In addition, the rotational position can be detected in a smaller range. For example, 45°, 135°, 225°, and 315° can also be detected independently.

[0231] The second rotation position detection unit 70B is composed of an optical absolute encoder in the same manner as the first rotation position detection unit 70A, and is provided with a second optical scale 71B to which different symbols are assigned according to the rotation position and a second reading sensor 72B for reading the second optical scale 71B. The details of the detection method are substantially the same as those of the first rotation position detection unit 70A.

[0232] Furthermore, the first rotational position detection unit 70A and the second rotational position detection unit 70B are not limited to optical absolute encoders, and for example, a potentiometer or the like that outputs a rotational angle, a movement amount, etc. as a voltage signal may be used.

[0233] [Lens shift mechanism]

[0234] The projection device body 2 is provided with a lens shift mechanism 80. The lens shift mechanism 80 moves the projection lens 3 relative to the projection device body 2 to shift the optical axis of the projection lens 3. More specifically, the lens shift mechanism 80 shifts the optical axis of the projection lens 3 by moving the projection lens 3 in a plane orthogonal to the first optical axis Z1.

[0235] <Structure of the lens shift mechanism>

[0236] Fig.40 1 is a front view showing a schematic structure of the lens shift mechanism when the projection device body 2 is placed horizontally. In this figure, the direction indicated by the arrow X is the left-right direction (the same meaning as the lateral and horizontal directions) when the projection device body 2 is placed horizontally, and the direction indicated by the arrow Y is the up-down direction (the same meaning as the longitudinal and vertical directions) when the projection device body 2 is placed horizontally.

[0237] The lens shift mechanism 80 includes a base plate 81, a first sliding plate 82, and a second sliding plate 83 (see also Fig.35 ), a first sliding plate driving mechanism 84 and a second sliding plate driving mechanism 85.

[0238] The substrate 81 is fixed to the projection device body 2. The first sliding plate 82 is mounted on the substrate 81, and the second sliding plate 83 is mounted on the first sliding plate 82. The second sliding plate 83 is integrally provided with a mounting portion 83M. The mounting portion 83M is a mounting portion for the projection lens 3. The projection lens 3 is mounted on the lens shift mechanism 80 by fastening the flange portion 32A provided on the first holding portion 31 of the lens barrel 30 to the mounting portion 83M with screws, and is connected to the projection device body 2. The projection lens 3 connected to the projection device body 2 is arranged so that its first optical axis Z1 is orthogonal to the housing front portion 14A of the projection device body 2.

[0239] Fig.41 It is a front view showing the supporting structure of the first sliding plate with respect to the base plate.

[0240] As shown in the figure, two parallel first slide rails 81C are provided on the base plate 81. The two first slide rails 81C are parallel to the base plate 81 and are arranged at an angle of 45° relative to the horizontal direction. The first slide plate 82 is held to slide freely along the first slide rails 81C (hereinafter, the moving direction of the first slide plate 82, i.e., the longitudinal direction of the first slide rail 81C is referred to as the first direction α).

[0241] Fig.42 It is a front view showing the supporting structure of the second sliding plate with respect to the first sliding plate.

[0242] As shown in the figure, two parallel second slide rails 82C are provided on the first slide plate 82. The two second slide rails 82C are parallel to the first slide plate 82 and are arranged orthogonally to the first direction α. ​​The second slide plate 83 is held to slide freely along the second slide rails 82C (hereinafter, the moving direction of the second slide plate 83, that is, the longitudinal direction of the second slide rails 82C is referred to as the second direction β).

[0243] like Fig.40 , Fig.41 , Fig.42 As shown, the base plate 81, the first sliding plate 82 and the second sliding plate 83 are provided with a base opening 81A, a first opening 82A and a second opening 83A respectively. The base opening 81A, the first opening 82A and the second opening 83A are provided to open the optical path of the image light for projection respectively. The positions, sizes and shapes of the base opening 81A, the first opening 82A and the second opening 83A are respectively determined so that the optical path of the image light will not be blocked even if the lens barrel 30 moves with the sliding of the first sliding plate 82 and the second sliding plate 83.

[0244] Furthermore, the first slide plate 82 includes a first groove portion 82B connected to the first slide plate driving mechanism 84 , and the second slide plate 83 includes a second groove portion 83B connected to the second slide plate driving mechanism 85 .

[0245] Fig.43 It is a front view showing a schematic structure of the first slide plate driving mechanism.

[0246] As shown in the figure, the first slide plate driving mechanism 84 includes a first shift motor 86, a first rotation shaft 87, and a first moving element 88. Each part of the first slide plate driving mechanism 84 is mounted on the base plate 81.

[0247] The first shift motor 86 is constituted by, for example, a stepping motor. The first shift motor 86 has a first drive shaft 86A. The first drive shaft 86A is arranged to be orthogonal to the first direction α.

[0248] The first rotation shaft 87 is arranged to be orthogonal to the first drive shaft 86A of the first shift motor 86 and is arranged in parallel with the first direction α. ​​The first rotation shaft 87 is provided with a first threaded portion 87A composed of an external thread.

[0249] The first rotating shaft 87 and the first driving shaft 86A are connected to each other so as to be capable of transmitting rotation via a first worm gear 89. The first worm gear 89 is composed of a first worm 89A provided on the first driving shaft 86A and a first worm wheel 89B provided on the first rotating shaft 87. When the first shift motor 86 rotates, the rotation of the first driving shaft 86A is transmitted to the first rotating shaft 87 via the first worm gear 89, and the first rotating shaft 87 rotates.

[0250] The first moving member 88 includes a first moving member body 88A and a first connecting portion 88B. The first moving member body 88A has a cylindrical shape and has an internal thread portion at the inner circumference. The first moving member 88 is installed on the first rotating shaft 87 by making the internal thread portion threadedly engaged with the first threaded portion 87A of the first rotating shaft 87. The first moving member 88 installed on the first rotating shaft 87 is restricted from rotating by the first moving member body 88A sliding on the first sliding plate 82. The first connecting portion 88B is protruded from the first moving member body 88A as a protrusion that can be engaged with the first groove portion 82B of the first sliding plate 82. The first moving member 88 is connected to the first sliding plate 82 by the first connecting portion 88B being engaged in the first groove portion 82B.

[0251] When the first sliding plate driving mechanism 84 of the above structure drives the first shift motor 86 to rotate the first rotating shaft 87, the first moving member 88 moves along the first rotating shaft 87. Moreover, the first sliding plate 82 slides along the first direction α due to the first moving member 88 moving along the first rotating shaft 87. When the first shift motor 86 is rotated in the positive direction, the first sliding plate 82 moves in the positive direction of the first direction α (in the positive direction). Fig.41 When the first shift motor 86 is rotated in the reverse direction, the first sliding plate 82 moves in the - direction of the first direction α (in the upper right direction). Fig.41 Swipe to the lower left.

[0252] Fig.44 It is a front view showing a schematic structure of the second slide plate driving mechanism.

[0253] As shown in the figure, the second sliding plate driving mechanism 85 includes a second shift motor 90, a second rotating shaft 91, a second moving member 92, a base plate 81, a second driving shaft 90A, a second threaded portion 91A, a second worm gear 93, a second worm 93A, a second worm wheel 93B, a second moving member body 92A and a second connecting portion 92B. The mechanism of the second sliding plate driving mechanism 85 is substantially the same as that of the first sliding plate driving mechanism 84. In addition, the details of the components of the second sliding plate driving mechanism 85 are substantially the same as those of the corresponding first sliding plate driving mechanism 84.

[0254] <Shifting operation of the lens shift mechanism>

[0255] The lens shift mechanism 80 configured as described above shifts the projection lens 3 within a plane orthogonal to the first optical axis Z1 by controlling the driving of the first shift motor 86 and the second shift motor 90 .

[0256] For example, when the projection lens 3 is shifted upward, the first shift motor 86 and the second shift motor 90 are rotated in the positive direction by the same amount. Fig.40 The second sliding plate 83 slides in the + direction of the second direction β (in the upper right direction). Fig.40 The projection lens 3 moves upwards.

[0257] In addition, for example, when the projection lens 3 is shifted downward, the first shift motor 86 and the second shift motor 90 are rotated in opposite directions by the same amount. Fig.40 The second sliding plate 83 slides in the - direction of the second direction β (in the lower left direction). Fig.40 The projection lens 3 moves downwards.

[0258] For example, when the projection lens 3 is shifted to the right, the first shift motor 86 is rotated forward and the second shift motor 90 is rotated reversely by the same amount. Fig.40 The second sliding plate 83 slides in the - direction of the second direction β (in the upper right direction) and the second sliding plate 83 slides in the - direction of the second direction β (in the Fig.40 The projection lens 3 is shifted to the right by sliding the same amount as above (in the lower right direction in the figure).

[0259] For example, when the projection lens 3 is shifted to the left, the first shift motor 86 is rotated in the reverse direction, and the second shift motor 90 is rotated in the forward direction by the same amount. Fig.40The second sliding plate 83 slides in the + direction of the second direction β (in the lower left direction) and the second sliding plate 83 slides in the + direction of the second direction β (in the lower left direction) Fig.40 The projection lens 3 is shifted to the left by sliding the same amount as above (in the upper left direction).

[0260] [Electrical internal structure of the projection device]

[0261] Fig.45 is a block diagram showing an embodiment of the electrical internal structure of the projection device.

[0262] like Fig.45 As shown, the projection lens 3 of the projection device 1 includes a focus drive unit 110, a zoom drive unit 120, a lock mechanism 60, an unlocking operation unit 11, a display unit 150, a first rotation position detection unit 70A, and a second rotation position detection unit 70B. In addition, the optical systems and holding units of the projection lens 3 are omitted.

[0263] The projection device body 2 of the projection device 1 is provided with a CPU (Central Processing Unit) 210, a body posture detection unit 23, a storage unit 240, a projection image output unit 250, an OSD (On Screen Display) image output unit 252, a display control unit 254, a lens shift mechanism 80, a shift control unit 262, a light source control unit 270, and a power supply control unit 280, in addition to the aforementioned body operating unit 6, power connector 9, light source unit 20, and DMD 22B.

[0264] The focus drive unit 110 includes a focus motor 58 and a drive circuit thereof, and drives the focus motor 58 (see FIG. Fig.33 ). Then, in Fig.35 In the embodiment of the present invention, the focus driving unit 110 moves the third optical system second lens group G32 along the third optical axis Z3, thereby adjusting the focus of the projection image projected from the projection lens 3 onto the projection target surface (screen, etc.).

[0265] The zoom drive unit 120 includes the zoom motor 38 and its drive circuit, and drives the zoom motor 38 (see FIG. Fig.33 ). Moreover, in Fig.35 In the embodiment, the zoom drive unit 120 moves the first optical system second lens group G12, the first optical system third lens group G13 and the first optical system fourth lens group G14 along the first optical axis Z1, thereby adjusting the field angle (zoom ratio) of the projection image projected from the projection lens 3 onto the projection target surface.

[0266] As described above, the locking mechanism 60 includes the first locking mechanism 60A that locks the rotation of the second holding portion 40 and locks the rotation of the projection lens 3 around the first rotation axis θ1. In addition, the locking mechanism 60 includes the second locking mechanism 60B that locks the rotation of the third holding portion 50 and locks the rotation of the projection lens around the second rotation axis θ2. The first locking mechanism 60A drives the first solenoid 68A based on the lock release command (first lock release signal) from the CPU 210. Then, the claw portion 64A of the first locking claw 61A is retracted from the first locking groove portion 32E by the first solenoid 68A, and the lock of the second holding portion 40 is released. The second locking mechanism 60B drives the second solenoid 68B based on the lock release command (second lock release signal) from the CPU 210. Then, the claw portion 64B of the second locking claw 61B is retracted from the second locking groove portion 51C by the second solenoid 68B, and the lock of the third holding portion 50 is released.

[0267] The lock release operation portion 11 includes a first lock release switch 11A that releases the lock on the second holding portion 40 by the first lock mechanism 60A and a second lock release switch 11B that releases the lock on the third holding portion 50 by the second lock mechanism 60B.

[0268] exist Figure 1 When the first lock release switch 11A is turned on (pressed once), the first lock release command signal is output from the first lock release switch 11A to the CPU 210. When the first lock release command signal is input from the first lock release switch 11A, the CPU 210 outputs a first lock release signal to the first lock mechanism 60A to release the lock performed by the first lock mechanism 60A for a certain period of time (for example, 10 seconds). When the first lock release signal is input, the first lock mechanism 60A drives the first solenoid 68A to release the lock of the second holding portion 40.

[0269] Similarly, when the second lock release switch 11B is turned on, the second lock release command signal is output from the second lock release switch 11B to the CPU 210. When the second lock release command signal is input from the second lock release switch 11B, the CPU 210 outputs a second lock release signal to the second locking mechanism 60B to release the lock performed by the second locking mechanism 60B for a certain period of time (for example, 10 seconds). When the second lock release signal is input, the second locking mechanism 60B drives the second solenoid 68B to release the lock of the third holding portion 50.

[0270] The display unit 150 is an LED (Light Emitting Diode) provided on the key top of the lock release operation unit 11 (the first lock release switch 11A and the second lock release switch 11B), and can emit white light and red light. The CPU 210 outputs a display control signal to the display unit 150 to light up or flash the white light and light up or flash the red light, and informs the lock state, unlock state, and warning of the second holding unit 40 and the third holding unit 50 of the projection lens 3. In addition, the details of the display control of the display unit 150 will be described later.

[0271] The first rotation position detection unit 70A detects the rotation position of the second holding unit 40. As described above, the first rotation position detection unit 70A detects seven rotation positions (including the rotation range) of 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, 135° to 180°, and 180° as the rotation position of the second holding unit 40. The second holding unit 40 can rotate within the range of 0° to 180°, and as described above, it becomes locked at the three positions of 0°, 90°, and 180° (the rotation state of the second holding unit 40 becomes a specific state). Figure 1 The rotation position of the second holding portion 40 shown is 90°. Figure 1 On the first rotation axis θ1( Figure 5 ) is set as a positive angle when rotating clockwise around .

[0272] The second rotation position detection unit 70B detects the rotation position of the third holding unit 50. As described above, the second rotation position detection unit 70B detects 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, 135° to 180°, 180°, 180° to 225°, 225° to 270°, 270°, 270° to 315°, and 315° to 360° as the rotation position of the third holding unit 50 (including the rotation range). The third holding unit 50 can rotate infinitely, and as described above, it becomes locked at four positions of 0° (=360°), 90°, 180°, and 270° (the rotation state of the third holding unit 50 becomes a specific state). Figure 1 The rotation position of the third holding portion 50 shown is 0°. Figure 1 Observe from the right side and set the clockwise rotation angle around the second rotation axis θ2 as a positive angle.

[0273] When the specific state of the three locations where the second holding portion 40 is locked is combined with the specific state of the four locations where the third holding portion 50 is locked, as shown in FIG. Figures 7 to 18 As shown in FIG. 1 , the projection lens 3 can take 12 locking states (specific states) relative to the projection device body 2. In particular, Figure 7As shown, the locked state (specific state) when the rotation position of the second holding portion 40 is 90° and the rotation position of the third holding portion 50 is 0° is the storage state in which the projection lens 3 is stored in the recessed portion 15 of the projection device body 2 .

[0274] Figures 7 to 18 1 is a perspective view showing 12 locking states of the projection lens 3 of the projection device 1, and particularly shows a case where the projection device body 2 is placed horizontally. Figures 19 to 30 The projection device main body 2 is shown in a vertical position.

[0275] Furthermore, the projection lens 3 can take any posture relative to the projection device 1 according to the rotational positions of the second holding portion 40 and the third holding portion 50. On the other hand, the "specific postures" of the projection lens 3 are 12 postures corresponding to the 12 lock states.

[0276] return Fig.45 A first rotation position signal indicating the rotation position of the second holding portion 40 detected by the first rotation position detection portion 70A and the second rotation position detection portion 70B, respectively, and a second rotation position signal indicating the rotation position of the third holding portion 50 are output to the CPU 210 .

[0277] The main body operation unit 6 provided in the projection apparatus main body 2 includes a power switch 6A, a MENU key 6B, a cross key 6C, an ENTER key 6D, a BACK key 6E, and the like.

[0278] The MENU key 6B is an operation key for instructing to display a menu on the projection screen projected on the screen. The cross key 6C is an operation key for inputting instructions in the four directions of up, down, left, and right, and functions as a button (cursor movement operation unit) for selecting an item from a menu screen or for instructing to select various setting items from each menu. In addition, the cross key 6C functions as a multi-function key for inputting various instructions according to the selected menu content.

[0279] The main body posture detection unit 23 is a sensor for detecting the posture (horizontally, vertically, etc.) of the projection device main body 2. For example, it can be composed of an acceleration sensor for measuring the inclination angle of the projection device main body 2 relative to the gravity direction. The main body posture detection unit 23 outputs an angle signal indicating the inclination angle of the projection device main body 2 obtained by the measurement to the CPU 210. In addition, the main body posture detection unit 23 can also be a sensor for detecting the horizontal and vertical positions of the projection device main body 2.

[0280] exist Fig.45The storage unit 240 includes a ROM (Read Only Memory), a RAM (Random Access Memory), a flash ROM, etc. The CPU 210 controls each unit of the projection device 1 in a unified manner using the RAM as a working area based on a control program stored in the ROM of the storage unit 240 and a table or parameter stored in the ROM or the flash ROM.

[0281] exist Fig.31 In the embodiment, the light of the three primary colors of red, green and blue (or red, green, blue and yellow) is incident on the DMD22B constituting the image display unit 22 in a time-sharing manner via the color wheel 24 of the light source unit 20. Then, the DMD22B performs light modulation according to the image signal corresponding to each color switched by time-sharing according to the display control unit 254, thereby emitting an image. By switching the images of each color at a high speed, the images are recognized as color images in the human eye due to the afterimage phenomenon. In addition, the DMD22B is listed as an electro-optical element, but it is not limited to this, and an LED panel, an organic light-emitting panel or a liquid crystal panel may also be used. In this case, a dichroic prism may be used instead of the total reflection prism 22A.

[0282] The video signal is transmitted from an external device such as a personal computer through a video input terminal 10 (see HDMI (registered trademark) (High-Definition Multimedia Interface) terminal) or the like. Figure 4 ) is input to the projection image output unit 250. The projection image output unit 250 outputs the image signal input from the image input terminal 10 to the display control unit 254 as a projection image (first image) under the control of the CPU 210.

[0283] The OSD image output unit 252 has an internal memory for storing text information, graphic information, icon images, etc. displayed as an OSD image, reads necessary information from the internal memory according to instructions from the CPU 210, and outputs it to the display control unit 254 as an OSD image (second image).

[0284] The display control unit 254 receives a projection image (first image) from the projection image output unit 250 and receives an OSD image (second image) from the OSD image output unit 252. In addition, the display control unit 254 outputs the projection image and the OSD image to the DMD 22B, respectively, or outputs a composite image obtained by synthesizing the projection image and the OSD image to the DMD 22B based on a display control instruction from the CPU 210. In addition, the display control unit 254 rotates the projection image and the OSD image appropriately and outputs them to the DMD 22B. The details of the rotation control of the projection image and the OSD image will be described later.

[0285] The shift control unit 262 receives from the CPU 210 a first rotation position signal indicating the rotation position of the second holding unit 40, a second rotation position signal indicating the rotation position of the third holding unit 50, and an angle signal indicating the tilt angle of the projection device body 2. Then, based on these input signals, the direction in which the projection image is to be moved (in this example, any one of the four directions of up, down, left, and right) is determined. Thereafter, in order to move the projection image in the determined direction, a movement command is output to the lens shift mechanism 80 (see Fig.40 ).

[0286] Here, the direction in which the projection image is moved is determined to be, for example, a direction in which interference ("vignetting" of the projection image) between the projection image and the projection device body 2 itself or the workbench on which the projection device body 2 is installed is reduced. In addition, the moving direction of the projection lens 3 is not in one-to-one correspondence with the moving direction of the projection image, but changes according to the rotational position of the second holding portion 40 and the third holding portion 50. Therefore, the direction in which the projection lens 3 is moved needs to be determined in consideration of the rotational position of the second holding portion 40 and the third holding portion 50, and whether the projection device body 2 is placed horizontally or vertically. In addition, the details of the control of the lens shift mechanism 80 will be described later.

[0287] The light source unit 20 has a laser light source 20A that emits laser light in this example, but a light emitting diode that emits white light or three light emitting diodes that emit red, green, and blue monochromatic light, respectively, may be used. When three light emitting diodes are used, the color wheel 24 may be omitted.

[0288] The light source control unit 270 receives from the CPU 210 a first rotation position signal indicating the rotation position of the second holding unit 40, a second rotation position signal indicating the rotation position of the third holding unit 50, an angle signal indicating the inclination angle of the projection device main body 2, and mode information indicating the projection mode (first mode, second mode) selected by the main body operation unit 6. Then, the light source control unit 270 determines whether the laser light source 20A of the light source unit 20 emits light or not based on these input signals, and controls the laser light source 20A to emit light or not. In addition, the details of the control of the light source control unit 270 will be described later.

[0289] Power (commercial power) is supplied to the power control unit 280 from the power connector 9. When the power switch 6A is turned on, the power control unit 280 generates a signal for supplying power from the power connector 9 to the CPU 210, the projection lens 3, various motors in the lens shift mechanism 80, and the lock mechanism 60 (see FIG. 1 ). Fig.36 ) and various voltages supplied by the solenoid of the laser light source 20A of the light source unit 20, and power is supplied to each part of the projection device main body 2.

[0290] In addition, the power supply control unit 280 has the following automatic power-off function: when the power switch 6A is turned off, the power supply to each part of the projection device main body 2 is stopped (the power supply is turned off), but the power supply is automatically turned off under certain conditions regardless of the operation of the power switch 6A. In addition, the detailed content of the control of the power supply control unit 280 will be described later.

[0291] (Structure related to the rotation of the projection lens)

[0292] The following is an overview of the configuration related to the rotation of the projection lens 3. Figures 32-35 As described above, the projection lens 3 includes a first holding portion 31, a second holding portion 40, and a third holding portion 50. The first holding portion 31 is connected to the projection device main body 2 (housing), and allows the light of the first optical axis Z1 (first optical axis) to pass through, and maintains the first optical system G1 (optical system). The second holding portion 40 allows the light of the second optical axis Z2 (second optical axis) after the light of the first optical axis Z1 is bent to pass through, and maintains the second optical system G2 (optical system). The third holding portion 50 allows the light of the third optical axis Z3 (third optical axis) after the light of the second optical axis Z2 is bent to pass through, and maintains the third optical system G3. The second holding portion 40 rotates relative to the first holding portion 31, and the third holding portion 50 rotates relative to the second holding portion 40.

[0293] In addition, the projection lens 3 has a first rotation position detection portion 70A (first detection portion) for detecting the rotation state of the second holding portion 40, and a second rotation position detection portion 70B (second detection portion) for detecting the rotation state of the third holding portion 50, and the first rotation position detection portion 70A and the second rotation position detection portion 70B constitute a detection portion. In addition, the projection lens 3 has a first locking mechanism 60A for setting the rotation of the second holding portion 40 to a locked state or an unlocked state, and a second locking mechanism 60B for setting the rotation of the third holding portion 50 to a locked state or an unlocked state. The first locking mechanism 60A and the second locking mechanism 60B constitute a locking mechanism 60 (locking mechanism portion). The details of the structures related to these rotations are as described above. Figures 32-35 described.

[0294] (Locking of holding portion, and control of power supply and light source associated with locking)

[0295] The locking and unlocking of the rotation of the holding portion and the control of the power source and light source related thereto will be described. Fig.46 , 47 1 is a flowchart showing the control sequence related to locking and unlocking, power on, and light source on. Fig.46 , 47In the description, the case where the projection lens 3 (projection lens) is handled in the stored state from the state where the power supply and the light source are disconnected is described. The "stored state" means that the projection lens 3 is stored in the recess 15a of the inner wall surface 15A of the recess 15 provided in the projection device body 2 (housing), and the third optical system third lens group G33 as the final lens group of the projection lens 3 is stored in the recess 15a (housing) relative to the recess 15a (housing) (first position) (refer to Figures 1 to 7 ). In this stored state, the lens cover front portion 18A (side), lens cover right side portion 18D (side), lens cover upper surface portion 18E (side) and lens cover bottom surface portion 18F (side) of the lens cover 18 (cover member) are respectively located on substantially the same plane as the housing front portion 14A (side), housing right side portion 14D (side), housing upper surface portion 14E (side) and housing bottom surface portion 14F (side) of the projection device main body 2 (housing 14). Moreover, these portions together with the projection device main body 2 (housing 14) form a flat rectangular parallelepiped shape (rectangular parallelepiped) (refer to Figures 1 to 7 ).

[0296] When the process starts, the power supply control unit 280 determines whether the power supply is turned on (operation of turning on the power switch 6A) (step S100). When the judgment of step S100 is affirmative, the process proceeds to step S102, and the locking mechanism 60 (locking mechanism unit) determines whether the second holding portion 40 and the third holding portion 50 are in a locked state. The power supply control unit 280 turns on the power supply (step S104) when the second holding portion 40 and the third holding portion 50 are in a locked state (YES in step S102), and does not turn on the power supply (step S106) but returns to step S102 when they are not in a locked state (NO in step S102).

[0297] When the power is turned on in step S104, the locking mechanism 60 makes the LED (display unit 150; lamp) provided in the first lock release switch 11A (lock release switch) and the second lock release switch 11B (lock release switch) flash with white light, for example (step S108). Thus, the user can easily grasp that the lock release switch should be operated. In other words, even if the power of the projection device 1 is turned on, the locking mechanism 60 maintains the locked state of the rotation of each holding portion.

[0298] When the first lock release switch 11A is input (operated) (YES in step S110), the second locking mechanism 60B (second locking mechanism part) is set to be unable to release the lock of the third holding part 50 (step S112), and the first locking mechanism 60A (first locking mechanism part) releases the lock of the second holding part 40 (set to the lock release state for a certain period; step S114). When the lock is released, the LED of the first lock release switch 11A stops flashing and continues to light up with white light. On the other hand, the second lock release switch 11B of the third holding part 50 in the locked state is extinguished. As a result, the user can easily grasp that the second holding part 40 is in the lock release state. In addition, since the second holding part 40 is in the lock release state for a certain period, the user can perform the rotation operation of the second holding part 40 during this period. In addition, the locking mechanism 60 will not release the lock of both the second holding part 40 and the third holding part 50 at the same time (when one is in the lock release state, the other is set to the locked state). Therefore, it is possible to prevent the two shafts from becoming a rotatable state at the same time and causing unexpected rotation.

[0299] The first rotation position detection unit 70A and the second rotation position detection unit 70B detect the rotation state of the second holding unit 40 and the third holding unit 50 respectively, and determine whether the projection lens 3 is in the storage state (first position) (step S116). When the projection lens 3 does not rotate and maintains the storage state (YES in step S116), the light source control unit 270 does not turn on the laser light source 20A (light source) (step S124), and notifies the user of a warning (step S126). The warning in step S126 can be performed, for example, by flashing the LEDs of the first lock release switch 11A and the second lock release switch 11B with white light through the locking mechanism 60 (first locking mechanism 60A, second locking mechanism 60B). On the other hand, in the warning of step S126, the projection device 1 can also make the display unit 150 generate a warning sound such as a beep through a device such as an electronic circuit not shown instead of flashing or in addition to flashing. The warning state continues during the period when the judgment of step S116 is YES (the period when the projection lens 3 is in the storage state).

[0300] When the rotation state of the projection lens 3 is displaced to a state other than the storage state (the projection lens 3 can be displaced to the first position in the storage state and the second position other than the first position), the judgment of step S116 is negative, and when the second holding part 40 is further locked in a specific state (described later), the judgment of step S118 is positive. In this state, the locking mechanism 60 is set to unlock the third holding part 50 (step S120), and the light source control part 270 turns on the laser light source 20A (light source) (step S122). On the other hand, when the second holding part 40 is not locked (for example, when the rotation state is not in a lockable specific state; NO in step S118), the light source control part 270 does not turn on the laser light source 20A (step S128), and notifies a warning by, for example, flashing red light of an LED or beeping (step S130) and returns to step S118. Furthermore, “unlockable” means that the lock is released when the user inputs (operates) the lock release switch (first lock release switch 11A or second lock release switch 11B), and “unlockable” means that the lock is not released even if the lock release switch is input.

[0301] exist Fig.47 In step S110, when the first lock release switch 11A is not input (operated) but the second lock release switch 11B is input (YES in step S132), the first locking mechanism 60A is set to be unable to release the lock of the second holding part 40 (step S134), and the second locking mechanism 60B releases the lock of the third holding part 50 (set to the lock release state; step S136). When the lock is released, the flashing of the LED ends, and the second lock release switch 11B of the third holding part 50 that is locked and released continues to light up, for example, with white light. On the other hand, the first lock release switch 11A of the second holding part 40 that is in the locked state is extinguished. As a result, the user can easily understand that the third holding part 50 is in the lock release state. Since the third holding part 50 is in the lock release state for a certain period of time, the user can perform the rotation operation of the third holding part 50 during this period. In addition, when the second lock release switch 11B is not input (NO in step S132), the process returns to step S108.

[0302] After the lock of the third holding part 50 is released, the first rotation position detection part 70A (detection part) and the second rotation position detection part 70B (detection part) detect the rotation state of the second holding part 40 and the third holding part 50 respectively and determine whether the projection lens 3 is in the storage state (step S138). When the judgment is affirmative (when it is in the storage state), the light source control part 270 does not turn on the laser light source 20A (light source) (step S146), for example, notifies the user of a warning by flashing the white light of the LED or beeping (step S148) and returns to step S138. When the judgment of step S138 is negative (when it is not in the storage state), the third holding part 50 becomes a specific state (described later) and is locked (YES in step S140). Then, the locking mechanism 60 is set to be able to unlock the lock of the second holding part 40 for a certain period of time (step S142), and the light source control part 270 turns on the laser light source 20A (step S144). On the other hand, when the third retaining portion 50 is not locked (for example, the rotation state is not a lockable specific state; NO in step S140), the light source control portion 270 does not turn on the laser light source 20A (step S150), and notifies a warning (step S152), for example by flashing red light of an LED or making a beeping sound, and returns to step S140.

[0303] <Effects of lock-related controls>

[0304] As described above, since the projection lens 3 is not powered on in the rotatable state, each retaining portion cannot rotate without a lock release instruction from the user. Therefore, it is possible to prevent the user from unexpectedly rotating the projection lens 3, and to appropriately limit the rotation state of the projection lens 3. In other words, it is possible to appropriately perform control related to the rotation of the projection lens. In addition, Fig.51 As described in S218 of FIG. 1 , when the holding portion is in a state other than a specific state, the projection device cannot be powered off. Therefore, when the power is turned on, the rotation of the projection lens 3 can be set to a locked state.

[0305] In addition, when the light source is turned on when the projection lens 3 is in the stored state (first position), the emitted light reaches the recessed portion 15a of the projection device body 2, and the temperature rises, which may have an adverse effect on the operation of the projection device 1, but by controlling as described above, such adverse effects can be prevented. In addition, the operation of inputting the first lock release switch 11A and the second lock release switch 11B can be considered as the user preparing to use the projection device 1, such as changing the rotation state or setting the projection direction, so the light source is turned on according to the input of these lock release switches.

[0306] (Locked in a specific state)

[0307] The second holding part 40 and the third holding part 50 are locked when the rotation state is in a specific state. In other words, the second holding part 40 and the third holding part 50 are unlocked in a state other than the specific state. Such locking control will be described. Fig.48 1 is a flowchart showing the process related to locking the holding part. The main body posture detection unit 23 (third detection unit) detects the direction (posture; whether it is horizontal or vertical, or other) of the projection device 1 relative to gravity (step S160). The first rotation position detection unit 70A and the second rotation position detection unit 70B respectively detect the rotation state of the second holding part 40 and the third holding part 50 (step S162). The horizontal state and the vertical state of the projection device 1 are respectively as shown in FIG. Figures 7 to 18 , Figures 19-30 The locking mechanism 60 (first locking mechanism 60A; locking mechanism unit) determines whether the second holding portion 40 is in the unlocked state (step S164). If it is in the unlocked state (YES in step S164), the third holding portion 50 is set to be unlockable (even if the second unlock switch 11B is input, the lock is not unlocked) (step S166).

[0308] The first locking mechanism 60A (locking mechanism part) of the locking mechanism 60 determines whether the second holding part 40 is in a specific state based on the rotation state of the second holding part 40 detected in step S162 (step S168). "The second holding part 40 is in a specific state" means that the rotation position of the second holding part 40 is any one of 0°, 90°, and 180°. When the second holding part 40 is in this "specific state" (YES in step S168), as described above, Fig.36 As described above, the first locking mechanism 60A can lock the second holding portion 40 (step S170). Then, the second locking mechanism 60B is set to unlock the third holding portion 50 (set to a releasable state by inputting the second lock release switch 11B) (step S172). When the second holding portion 40 is not in a "specific state" (NO in step S168), the first locking mechanism 60A cannot lock the second holding portion 40. In addition, in addition to "the second holding portion 40 is in a specific state", the second holding portion 40 can also be locked when the projection device 1 is in a specific state (vertical or horizontal) relative to the direction of gravity.

[0309] On the other hand, when the judgment of step S164 is NO (the second holding part 40 is not in the unlocked state, that is, in the locked state), the locking mechanism 60 (the second locking mechanism 60B; the locking mechanism part) judges whether the third holding part 50 is in the unlocked state (step S174). If the judgment is NO, both the second holding part 40 and the third holding part 50 are in the locked state, so a warning is notified (step S184). As the content of the warning, as described above, Fig.46 As described in step S102, the first lock release switch 11A or the second lock release switch 11B is urged to be input.

[0310] When the third holding part 50 is in the unlocked state (YES in step S174), the first locking mechanism 60A (locking mechanism part) is set to be unable to unlock the second holding part 40 (step S176). The second locking mechanism 60B (locking mechanism part) of the locking mechanism 60 determines whether the third holding part 50 is in a specific state based on the rotation state of the third holding part 50 detected in step S162 (step S178). "The third holding part 50 is in a specific state" means that the rotation position of the third holding part 50 is any one of 0°, 90°, 180°, and 270°. When the third holding part 50 is in the "specific state" (YES in step S178), the second locking mechanism 60B locks the third holding part 50 (step S180). Then, the first locking mechanism 60A is set to be able to unlock the second holding part 40 (set to a releasable state by inputting the first lock release switch 11A) (step S182). When the third holding portion 50 is not in a specific state, the second locking mechanism 60B does not lock the third holding portion 50. In addition, in addition to "the third holding portion 50 is in a specific state", the third holding portion 50 may be locked when the projection device 1 is in a specific state (vertical or horizontal) relative to the direction of gravity.

[0311] <Effects locked in certain situations>

[0312] As described above, the second holding portion 40 and the third holding portion 50 are locked when they are in a specific state, respectively, and these holding portions are not unlocked at the same time (when one is in the unlocked state, the other is set to the locked state), so the rotation state can be appropriately restricted to prevent adverse effects caused by unexpected rotation, etc. That is, the control related to the rotation of the projection lens can be appropriately performed. In addition, in addition to "the second holding portion 40 and the third holding portion 50 are in a specific state", the second holding portion 40 and / or the third holding portion 50 can also be locked when the projection device 1 is in a specific state (vertical or horizontal) relative to the direction of gravity.

[0313] (Restrictions on unlocking in an unsafe state)

[0314] The restrictions on unlocking in an unsafe state are explained. Fig.491 is a flowchart of the process of limiting the unlocking. The locking mechanism 60 determines whether the unlocking operation (the input of the first unlocking switch 11A and the second unlocking switch 11B) has been performed (step S190). The main body posture detection unit 23 (third detection unit) detects the direction (setting state) of the projection device 1 relative to gravity (step S192), and determines whether it is horizontally placed or vertically placed (step S194). The horizontally placed state and the vertically placed state of the projection device 1 are respectively as shown in FIG. Figures 7 to 18 , Figures 19-30 shown.

[0315] When placed vertically (NO in step S194), there is no state in which the lock cannot be unlocked, so the processing is terminated. When placed horizontally (YES in step S194), the first rotation position detection unit 70A and the second rotation position detection unit 70B detect the rotation states of the second holding unit 40 and the third holding unit 50, respectively (step S196). Then, the locking mechanism 60 (first locking mechanism 60A, second locking mechanism 60B: locking mechanism unit) determines whether the second holding unit 40 and the third holding unit 50 are in an unsafe state (step S198). The "unsafe state" in step S198 refers to a state in which, for example, the rotation position of the second holding unit 40 is 0° and the rotation position of the third holding unit 50 is 90° (refer to Fig.10 ). If the judgment is positive, the locking mechanism 60 is set to be unable to unlock the second holding portion 40 (step S200). By setting the second holding portion 40 to be unable to unlock in this state, it is possible to prevent the second holding portion 40 from rotating and causing the third optical system third lens group G33 (exit optical system) as the final lens to collide with the installation surface, etc. In addition, "unable to unlock the second holding portion 40" means a state in which the lock is not unlocked even if the first lock release switch 11A is input.

[0316] If the second holding unit 40 is locked and cannot be released in step S200, the lock mechanism 60, the OSD image output unit 252, and the display control unit 254 notify the reason why the lock cannot be released or the method of releasing the lock (step S202). Specifically, the notification may be made through an OSD image, for example. Fig.50 1 is a diagram showing an example of notification by OSD image, and part (a) of the figure is an example of displaying the reason why the release is not possible ("the lens rotation of axis 1 cannot be performed at this position") by OSD image 99A synthesized with projection image 98. In addition, part (b) of the figure is an example of displaying the release method by OSD image 99B (if the third holding portion 50 is moved from Fig.10In addition, both the reason why the lock cannot be unlocked and the method for unlocking can be displayed. With such a display, the user can easily understand the reason why the lock cannot be unlocked or the method for unlocking. In addition, in other "unsafe states" other than the above-mentioned state (the state where the rotation position of the second holding part 40 is 0° and the rotation position of the third holding part 50 is 90°), when the lock of the second holding part 40 cannot be unlocked, and in other "unsafe states", when the lock of the third holding part 50 cannot be unlocked, the same control can be performed.

[0317] As described above, according to the projection device 1 (projection device) and the projection lens 3 (projection lens), control related to the rotation of the projection lens (control of the rotation state of the projection lens, and the power supply, light source, and locking state of the holding portion associated with the rotation state) can be appropriately performed.

[0318] (Shape of the projector in the stored state, etc.)

[0319] In the storage state of the projection device 1, the lens cover front portion 18A (side), the lens cover right side portion 18D (side), the lens cover upper surface portion 18E (side), and the lens cover bottom surface portion 18F (side) of the lens cover 18 (cover member) are respectively located on substantially the same plane as the housing front portion 14A (side), the housing right side portion 14D (side), the housing upper surface portion 14E (side), and the housing bottom surface portion 14F (side) of the projection device main body 2 (housing). Moreover, these portions together with the projection device main body 2 form a flat rectangular parallelepiped shape (rectangular parallelepiped) (refer to Figures 1 to 7 ). Thus, the projection device 1 can be installed and stored in a stable state, and one surface can be prevented from protruding and causing collision, damage, etc. In addition, since it is a rectangular parallelepiped, it is easy to install and store. In addition, the "rectangular parallelepiped shape" is not limited to a geometrically perfect rectangular parallelepiped, and there may be a gap between the projection lens 3 and the projection device body 2 (housing), and there may be protrusions such as the horizontal leg 12, the vertical leg 13 or the main operating part 6, and depressions such as the power connector 9 on the projection lens 3 or the projection device body 2. In addition, a part of the projection lens 3 and / or the projection device body 2 may be chamfered, etc. In addition, "on the same plane" is not limited to a geometrically perfect same plane, and the surfaces of the lens cover 18 and the surfaces of the projection device body 2 may be staggered within a range that does not hinder the installation or storage of the projection device 1.

[0320] (Locking in a specific state and projection of light associated with the rotation state)

[0321] The locking when the rotation state of the holding portion is in a specific state and the projection of light from the light source associated with the rotation state will be described. Fig.51 Flowchart showing the locking of the holding part and the control sequence related to the projection of light. The first rotation position detection part 70A and the second rotation position detection part 70B detect the rotation state of the second holding part 40 and the third holding part 50 respectively (step S210), and judge whether the second holding part 40 and the third holding part 50 are in a specific state (step S212). "The second holding part 40 is in a specific state" means that the rotation position of the second holding part 40 is any one of 0°, 90°, and 180°, and "the third holding part 50 is in a specific state" means that the rotation position of the third holding part 50 is any one of 0° (360°), 90°, 180°, and 270°. When both the second holding part 40 and the third holding part 50 are in a specific state (YES in step S212), the first locking mechanism 60A (locking mechanism part) sets the second holding part 40 to a locked state, and the second locking mechanism 60B (locking mechanism part) sets the third holding part 50 to a locked state (step S214). When the second holding section 40 and the third holding section 50 are set to the locked state, the light source control section 270 projects light from the laser light source 20A (light source) (step S216 ).

[0322] On the other hand, when the second holding portion 40 and / or the third holding portion 50 is in a state other than the specific state (NO in step S212), the locking mechanism 60 (first locking mechanism 60A, second locking mechanism 60B) cannot set the holding portion (second holding portion 40, third holding portion 50) to the locked state. This is because the claw portion (claw portion 64A, claw portion 64B) of the locking mechanism 60 does not fit into the locking groove portion (first locking groove portion 32E, second locking groove portion 51C) outside the rotation angle that becomes the specific state. In this case, the lock release operation portion 11 (first lock release switch 11A, second lock release switch 11B) (control portion) cannot perform an operation related to the locked state (step S218). Alternatively, the power supply control portion 280 (control portion) cannot perform an operation to turn off the power supply (step S218). "Operation related to the locked state" refers to, for example, an operation to lock (an operation to set to the locked state) and an operation to release the lock of the locked holding portion.

[0323] The locking mechanism 60 (control unit), the OSD image output unit 252 (control unit) and the display control unit 254 (control unit) notify the reason why the holding unit (the second holding unit 40 and / or the third holding unit 50) cannot be set to a locked state and / or urge the holding unit to be set to a specific state (step S220). Fig.52This is an example of a notification of an urging based on the OSD image 99C synthesized with the projected image 98. The message "It cannot be locked in this rotation state" indicates an example of a notification of the reason why it cannot be set to the locked state. The message "Please rotate the rotation axis in 90° units" indicates an example of a notification of an urging to set the holding unit to a specific state. Fig.52 In the example of , the reason and the urging are notified, but either the reason or the urging may be notified. By following such a notification, the user can quickly set the holding unit to the locked state. In addition, the notification in step S220 may also be performed by flashing an LED or making a beeping sound. When the power-off operation cannot be performed, the notification of the reason or the urging to set the unit to a specific state is the same as the notification when the lock state cannot be set as described above.

[0324] After the notification in step S220, the light source control unit 270 (control unit) determines whether it is set to any one of the first mode and the second mode (step S222). The "first mode" is a mode in which the light from the laser light source 20A (light source) is not projected in a state other than a specific state, and the "second mode" is a mode in which the light from the laser light source 20A is projected in a state other than a specific state. In the case of the first mode, the projection lens 3 (projection lens) does not project the light from the laser light source 20A (light source) through the control of the light source control unit 270 (control unit) (step S224), and in the case of the second mode, the projection lens 3 (projection lens) projects the light from the laser light source 20A through the control of the light source control unit 270 (control unit) (step S226). The user can set the first mode or the second mode by operating the main body operation unit 6, thereby arbitrarily setting whether to perform projection during the rotation operation. In particular, when the projection device 1 of this method rotates each holding portion of the projection lens, the projected image also rotates. In this case, it is assumed that the user does not want to visually check the projection image in the rotating state. Therefore, in this embodiment, the two modes can be switched by the user.

[0325] Furthermore, as described above, when the second holding portion 40 and the third holding portion 50 are not in a specific state, the power off operation (step S218) is disabled. However, the power off operation may be forced due to reasons such as the power cable (not shown) connected to the power connector 9 being unplugged. Fig.36 and Fig.37 As shown, by rotating the second holding portion 40 and the third holding portion 50 to a specific state, the claws (claws 64A and 64B) are automatically embedded in the locking grooves (first locking groove 32E and second locking groove 51C). That is, even when the power supply of the projection device 1 is disconnected, the locking mechanism 60 sets each holding portion to a locked state in a specific state.

[0326] In the projection device 1 , since the above-mentioned control of the lock state and projection of light related to the lock state are performed, control related to the rotation of the projection lens can be appropriately performed.

[0327] (Rotation and movement of the projection lens, and control of the power supply and light source associated with these)

[0328] Fig.53 This is a flowchart showing the order of controlling the power supply and the light source to be turned off in association with the rotation state and the movement state. The first rotation position detection unit 70A (first detection unit) and the second rotation position detection unit 70B (second detection unit) detect the rotation state of the second holding unit 40 and the third holding unit 50, respectively (step S240). The power supply control unit 280 determines whether an operation to turn off the power supply (for example, an operation on the power switch 6A) is input (step S242). When the operation is input (YES in step S242), the first rotation position detection unit 70A and the second rotation position detection unit 70B determine whether the rotation state is the storage state (step S244).

[0329] When the rotation state is the storage state (YES in step S244), the shift control unit 262 (control unit) moves the lens shift mechanism 80 (moving mechanism) to the storage position (step S246). As a result, the projection lens 3 moves relative to the projection device main body 2 (housing), and the projection lens 3 is set to the "storage state". The "storage position" of the lens shift mechanism 80 refers to the case where the side surface of the lens cover 18 and the side surface of the housing 14 are on the same plane. In addition, the "reference state" of the projection lens 3 refers to the case where the rotation state of each holding part is in the "storage state" and the lens shift mechanism 80 (moving mechanism) is in the "storage position".

[0330] In addition, the movement amount of the lens shift mechanism 80 can be set to Figures 40-44 The position at zero in the direction indicated by arrow X (left-right direction when the projection apparatus body 2 is placed horizontally) and the direction indicated by arrow Y (up-down direction when the projection apparatus body 2 is placed horizontally) is defined as the “stored position” of the lens shift mechanism 80 .

[0331] After moving to the storage position, the display control unit 254 and the OSD image output unit 252 (control unit) notify the user of the message "turn off the power supply and light source" before turning off the power supply and light source (step S248). Fig.45 The power supply control unit 280 and the light source control unit 270 (control unit) in the control unit 280 respectively turn off the power supply and the light source (laser light source 20A) (step S250). Fig.541 is a diagram showing an example of a notification message when the power source and the light source are turned off. Since the rotation state is the reference state, a message such as "No rotation is required. Turn off the power source and the light source" is displayed through an OSD image 99D synthesized with a projection image 98. This message is an example of information related to a change in the rotation state of the projection lens 3, and is also an example of information related to a change in the rotation state to the storage state (an example when no change is required).

[0332] When the power is off and the rotation state of the holding portion (the second holding portion 40, the third holding portion 50) is other than the reference state, the shift control portion 262 does not move the lens shift mechanism 80. Therefore, when the rotation state is not the stored state (step S244 is NO), the shift control portion 262 does not move the lens shift mechanism 80, and the display control portion 254 and the OSD image output portion 252 (control portion) notify a message urging a change to the stored state (step S252). Fig.55 9 is a diagram showing an example of a notification of a message urging a change, in which a message such as "Please rotate the projection lens to the storage state" is displayed by an OSD image 99E synthesized with a projection image 98. This message is another example of information related to a change in the rotation state of the projection lens 3, and is another example of information related to a change from the rotation state to the storage state (an example when a change is required).

[0333] In addition, Fig.53 In the description, the case where the power is turned off after the lens shift mechanism 80 (moving mechanism) is moved to the storage position is described (steps S246 to S250). However, after the notification of changing the rotation state of the projection lens 3 to the storage state is issued, the power may be turned off without moving the lens shift mechanism 80 to the storage position. In addition, the process content after the "operation of turning off the power" (step S242) may be changed between the case where an image is not being projected and the case where projection is being performed. For example, it may be set to "turn off the power after pressing the power switch 6A once when an image is not being projected" or "turn off the power after pressing it twice when an image is being projected." In addition, it is preferred that the power is automatically turned off after the rotation state is the storage state and the rotating part (second holding part 40, third holding part 50) becomes the locked state.

[0334] Fig.56 This is an example of the display of the OSD image 99F when the power is turned off in step S242, showing the operation of turning off the power while keeping the rotation state of the projection lens as it is, and turning off the power in the storage state (reference state). Part (a) of the figure is an example of the display when there is no input of the projection image, and part (b) is an example when there is input of the projection image 98. Through such a display, the user can easily understand the operation method.

[0335] (Control related to the movement of the projection lens)

[0336] Fig.57 2 is a flowchart showing the control procedure related to the movement (displacement) of the projection lens 3. The first rotation position detection unit 70A (detection unit) and the second rotation position detection unit 70B (detection unit) detect the rotation state of the second holding unit 40 and the third holding unit 50, respectively (step S260). In this case, in each rotation state of the holding unit, the projection lens 3 and the DMD 22B (see FIG. 22B ) as an electro-optical element are Fig.35 ) relative movement. In this embodiment, the shift control unit 262 (control unit) uses the lens shift mechanism 80 (moving mechanism) to move the projection lens 3 relative to the rotational state of each holding unit (the second holding unit 40, the third holding unit 50). The shift control unit 262 stores the information of the moving position of the projection lens 3 in the storage unit 240. Then, after the shift control unit 262 detects the rotational state through the detection unit, it refers to the information of the moving position stored in the storage unit 240 for the detected rotational state (step S262). Then, the projection lens 3 is moved to the stored moving position through the lens shift mechanism 80 (step S264). Since the projection lens 3 moves to the moving position corresponding to the rotational state, it is possible to perform appropriate control that takes into account the relationship between the two and quickly move to the moving position corresponding to the rotational state.

[0337] When the main operating unit 6 (receiving unit) receives the operation of the lens shift mechanism 80 (moving mechanism) by the user (YES in step S266), the shift control unit 262 (control unit) moves the projection lens 3 through the lens shift mechanism 80 according to the received operation content (movement direction and amount) (step S268). In this case (when the moving position has changed due to the user's operation), the shift control unit 262 (control unit) updates the information of the moving position stored in the storage unit 240 based on the received operation content and stores it (step S270). By updating the information of the moving position, the user can move the projection lens to the desired moving position. In addition, after the information is updated, the shift control unit 262 can move the projection lens 3 to the updated and stored moving position, and the user does not have to repeat the same moving operation every time it is used.

[0338] In addition, the above-mentioned method is one example of changing the relative positional relationship between the projection lens 3 and the electro-optical element. For example, the shift control unit 262 may not move the entire projection lens 3, but only move the second holding unit 40 and the third holding unit 50 (a part of the projection lens 3) of the projection lens 3. In addition, for example, the shift control unit 262 may also move the DMD 22B as the electro-optical element.

[0339] [Implementation Method of Image Rotation Correction]

[0340] Next, the rotation correction of the projection image and the OSD image will be described.

[0341] Fig.58 This is a flowchart showing an embodiment of image rotation correction performed by the CPU 210 and the display control unit 254 .

[0342] exist Fig.58 In the step S300, the CPU 210, which functions as a control unit for performing rotation correction of the image, receives detection signals indicating the rotation positions of the second holding unit 40 and the third holding unit 50 from the first rotation position detection unit (first detection unit) 70A and the second rotation position detection unit (second detection unit) 70B, respectively. In addition, the CPU 210 receives a detection signal indicating the posture of the projection device body 2, which is the main body of the projection device 1, from the main body posture detection unit (third detection unit) 23 (step S300).

[0343] The first rotation position detection unit 70A and the second rotation position detection unit 70B function as a posture information acquisition unit that acquires posture information representing the posture of the projection lens 3 (hereinafter referred to as the "lens posture"), and the main body posture detection unit 23 functions as a posture information acquisition unit that acquires posture information representing the posture of the projection device main body 2 (hereinafter referred to as the "main body posture").

[0344] The CPU 210 first determines whether the projection lens 3 is in a locked state based on the detection signals input from the first rotation position detection unit 70A and the second rotation position detection unit 70B (step S302). The locked state of the projection lens 3 refers to a state in which the rotation position of the second holding unit 40 is 0°, 90°, 180°, and the rotation position of the third holding unit 50 is 0°, 90°, 180°, 270°, and the unlocking action of the first locking mechanism 60A and the second locking mechanism 60B is released.

[0345] The projection lens 3 can take 12 kinds of locked states by the combination of the rotational positions (0°, 90°, 180°) of the second holding portion 40 and the rotational positions (0°, 90°, 180°, 270°) of the third holding portion 50. Here, the specific “lens posture” of the projection lens 3 in which the projection lens 3 is in the locked state is as follows: Figures 7 to 18 There are 12 types as shown. Furthermore, the CPU 210 can determine which specific "lens posture" the projection lens 3 is currently in based on the detection signals (detection results) input from the first rotational position detection unit 70A and the second rotational position detection unit 70B.

[0346] When it is determined that the projection lens 3 is in the locked state, the CPU 210 determines whether the projection lens 3 is in the stored state stored in the recessed portion 15 of the projection device body 2 (step S304). The stored state is a form of the locked state of the projection lens 3, which means that the rotation position of the second holding portion 40 is 90° and the rotation position of the third holding portion 50 is 0° (refer to Figure 7 ).

[0347] When the CPU 210 determines that the projection lens 3 is in the locked state and the projection lens 3 is not in the stored state, it determines whether the projection image output from the DMD 22B functioning as the image output unit to the projection lens 3 is rotated relative to the "reference position" based on the change of the "lens posture" or "subject posture" (step S306). The "subject posture" can be determined based on the detection signal from the subject posture detection unit 23.

[0348] Here, the "reference position" refers to the rotational position of an image that is upright on the screen when, for example, the camera is set in a horizontal position, an image with a horizontally long aspect ratio is captured, and the image is projected onto the screen without rotation correction. In addition, the angle of the image that takes the "reference position" based on the "lens posture" and "subject posture" (the image angle seen along the projection direction) is set to 0°, and the image angle in the clockwise direction is set to positive.

[0349] When determining that the image has rotated relative to the “reference position”, the CPU 210 determines whether the image has rotated 90°, 180°, or 270° (−90°) relative to the “reference position” (step S308 ).

[0350] The display control unit 254, which functions as a control unit for performing rotation correction of the image, inputs the determination result in step S308 from the CPU 210. The determination result corresponds to the rotation correction instruction of the image, and the display control unit 254 rotates the OSD image input from the OSD image output unit 252 by 270° (-90°) when the image is rotated 90° relative to the "reference position" (step S310). That is, the OSD image output from the DMD 22B to the projection lens 3 is rotationally corrected by 270°. As a result, the OSD image characters (character images) of the OSD image projected on the screen stand upright on the screen and become easy to read.

[0351] The DMD 22B of this example has an aspect ratio of being horizontally long, but it is preferred that the OSD image has an aspect ratio (e.g., 1:1) such that a portion of the OSD image is not cut off even when the OSD image is rotated 90° or 270°. In addition, when a DMD having an aspect ratio of 1:1 (a square DMD) is used as the DMD 22B, the aspect ratio of the OSD image can be set to any aspect ratio.

[0352] On the other hand, when the image is rotated 90° relative to the "reference position", the display control unit 254 does not rotate the projection image input from the projection image output unit 250. This is because when the projection image is rotated 90° or 270°, both ends of the projection image are cut off. In addition, the correction of rotating the projection image by 0° or 360° does not correspond to "rotation correction".

[0353] When the projection image is rotated 180° relative to the "reference position", the display control unit 254 rotates the projection image input from the projection image output unit 250 by 180° (step S312), rotates the projection image emitted from the DMD22B to the projection lens 3 by 180°, and similarly rotates the OSD image projected onto the screen by 180° (step S314).

[0354] Thus, the projection image and the OSD image are respectively rotationally corrected so that the vertical directions of the images are correct. In addition, the axisymmetric correction is also included in the 180° rotation correction.

[0355] In addition, the display control unit 254 rotates the projection image input from the projection image output unit 250 by 90° when the projection image is rotated 270° relative to the "reference position" (step S316). On the other hand, the display control unit 254 does not perform rotation correction of the projection image when the image is rotated 270° relative to the "reference position".

[0356] In addition, Fig.58 In the illustrated embodiment, the display control unit 254 performs rotation correction on the OSD image and the projected image based on the determination results of the “lens posture” and the “body posture”. However, the display control unit 254 may use a table in which the relationship between the “lens posture” and the “body posture” determined based on the detection signals of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the body posture detection unit 23 and the rotation correction of the OSD image and the projected image is recorded. Furthermore, the display control unit 254 may also obtain the presence or absence of rotation correction of the OSD image and the projected image and the correction angle from the table based on the detection signals of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the body posture detection unit 23.

[0357] In addition, each detection unit as the first rotation position detection unit 70A, the second rotation position detection unit 70B and the main body posture detection unit 23 also includes a receiving unit that receives the "lens posture" instruction (rotation instruction) and the "main body posture" instruction from the user. And, the present invention can also be applied to a projection device whose "main body posture" does not change.

[0358] Figure 59 to Figure 62The diagrams respectively show the projection image and the rotation correction of the OSD image which have been rotationally corrected as described above, and particularly show the case where the projection device main body 2 is placed horizontally.

[0359] When the projection device body 2 is placed horizontally, there are a plurality of (12) specific lens postures that become the locked state, and the lens posture No. representing the plurality of specific lens postures is associated with Figures 7 to 18 The 12 lens postures shown are associated with each other and are set as 1 to 12.

[0360] like Figure 59 to Figure 62 As shown, in the case where lens posture No. is 2, 5, 8, and 11 ( Figure 6 , Fig.11 , Fig.14 and Fig.17 ), the image angles seen along the projection direction are 0°, 90°, 180° and 270° respectively. In addition, the lens postures No. 2, 5, 8 and 11 are representative examples when the image angles are 0°, 90°, 180° and 270° respectively.

[0361] In the absence of image input. Figure 59 to Figure 62 As shown in the upper part of , only the OSD image is projected. When there is image input, such as Figure 59 to Figure 62 As shown in the lower part of , the projected image and the OSD image are a composite image.

[0362] Figure 59 to Figure 62 The circular area shown indicates the range that can be projected by the projection lens 3, and "up" indicates the orientation of the image before rotation correction.

[0363] like Figure 59 to Figure 62 As shown, when the image angle of the OSD image is 90°, 180°, and 270°, rotation correction is performed by 270° (-90°), 180°, and 90°, and as a result, the characters of the OSD image are always displayed upright.

[0364] On the other hand, the projected image of the image input is subjected to 180° rotation correction when the image angle is 180°. Therefore, when the image angle is an angle other than 180° (90°, 270°), the rotation correction of the projected image is not performed, and the projected image is displayed in a vertically long state (vertical display).

[0365] Thus, the rotation correction methods of the projected image and the OSD image are different.

[0366] <Another embodiment of rotation correction of projected image>

[0367] Fig.63 is a flowchart showing another embodiment of the rotation correction of the projected image. Fig.63In, with Fig.58 The common parts of the flowcharts shown are marked with the same step numbers, and their detailed descriptions are omitted.

[0368] exist Fig.63 In the process, when the CPU 210 determines that the image is rotated relative to the "reference position" based on the change of the "lens posture" or the "body posture" (in the case of "Yes" in step S306), it determines whether the first correction mode or the second correction mode is set as the correction mode for rotation correction of the projected image (step S320). The setting of the first correction mode or the setting of the second correction mode can be appropriately performed by the user operating the body operation unit 6.

[0369] Here, the first correction mode is a correction mode in which the projected image is rotationally corrected by 180° when the image is rotated by 180° relative to the "reference position". The second correction mode is a correction mode in which the projected image is rotationally corrected by 180° when the image is rotated by 180° relative to the "reference position", and the projected image is also rotationally corrected by 180° when the image is rotated by 90° relative to the "reference position".

[0370] When the CPU 210 determines in step S320 that the first correction mode is set, it then determines whether the image is rotated 180 degrees with respect to the “reference position” (step S322 ).

[0371] The display control unit 254 receives the result of the determination in step S322 from the CPU 210. The result of the determination corresponds to an image rotation correction instruction, and the display control unit 254 rotates the projection image received from the projection image output unit 250 by 180° when the image is rotated by 180° relative to the "reference position" (step S324).

[0372] On the other hand, in the first correction mode, when the image is rotated 90° or 270° relative to the “reference position”, the display control unit 254 does not rotate the projection image input from the projection image output unit 250 .

[0373] When the CPU 210 determines in step S320 that the second correction mode has been set, it then determines whether the image is rotated by 270° with respect to the “reference position” (step S326 ).

[0374] The display control unit 254 receives the result of the determination in step S326 from the CPU 210, and does not rotate the projection image input from the projection image output unit 250 when the image is rotated 270° relative to the "reference position". On the other hand, when the image is not rotated 270° relative to the "reference position" (i.e., when rotated 90° and 180°), the display control unit 254 rotates the projection image input from the projection image output unit 250 by 180° (step S324).

[0375] Fig.64 is a diagram summarizing the rotation correction of the projection image that has been rotationally corrected as described above, and Fig.59 Similarly, the case where the projection device main body 2 is placed horizontally is shown.

[0376] like Fig.64 As shown, in the case where lens posture Nos. are 2, 5, 8, and 11, the image angles viewed along the projection direction are 0°, 90°, 180°, and 270°, respectively.

[0377] In the case of the first correction mode, when the image angle is 180°, a rotation correction of 180° is performed. Thus, the projection image of the horizontally long projection is rotationally corrected so that the vertical direction is correct.

[0378] On the other hand, in the case of the second correction mode, when the image angle is 90° or 180°, a 180° rotation correction is performed. As a result, the projection image of the horizontally long projection is rotationally corrected so that the vertical direction is correct. In addition, the projection image of the vertically long projection is rotationally corrected so that the vertical direction is correct. Fig.56 The “upper” of the upper projection image in the vertical direction is always located on the left side. Thus, the upper and lower directions of the projection images of the vertical projection can be made consistent.

[0379] In this example, in the second correction mode, rotation correction is performed so that the "top" of the projected image is on the left side in the vertical direction. However, rotation correction may be performed so that the "top" of the projected image is on the right side in the vertical direction.

[0380] In addition, when a square DMD is used as the DMD 22B, the correction angle of the projected image may include angles other than 0° and 180°. In this case, rotation correction can be performed so that the vertical direction of the projected image is always correct.

[0381] <Embodiment of OSD image displayed by projection device 1>

[0382] Fig.65 1 is a diagram showing an example of an OSD image displayed by the projection device 1 , and particularly shows an OSD image related to an operation manual.

[0383] exist Fig.65 In the example shown, an OSD image is displayed to assist the operation of the "subject posture" and "lens posture" when the posture of the vertically long projection image (the upper direction of the image is the left side) projected on the projection surface (wall) is different on the same projection surface (in this example, when the upper and lower directions of the projection image are set to the correct upper and lower directions). The OSD image at this time is auxiliary information to assist the operation of the "subject posture" and "lens posture".

[0384] Fig.45 The CPU 210 shown can determine the “body posture” of the projection device body 2 based on the detection signal of the body posture detection unit 23, and determine the “lens posture” of the projection lens 3 based on the detection signals of the first rotation position detection unit 70A and the second rotation position detection unit 70B.

[0385] When the CPU 210 receives the instruction input requesting the operation assistance of the “body posture” and the “lens posture” from the body operation unit 6, the OSD image output unit 252 outputs the corresponding “OSD image” ( Fig.56 OSD image shown).

[0386] Users observe Fig.65 The OSD image shown in the figure shows how to operate the "body posture" and "lens posture". In this example, the horizontal projection device body 2 is rotated 90 degrees to make Fig.33 The third holding portion 50 of the projection lens 3 shown is rotated by -90° (270°), so that the vertical direction of the projected image can be set to the correct vertical direction.

[0387] Fig.66 FIG. 2 is a diagram showing another example of the OSD image displayed by the projection device 1 , and particularly shows an OSD image related to the operation manual.

[0388] exist Fig.66 In the example, when the projection device 1 is currently projecting a projection image onto the wall surface W1, auxiliary information for assisting the “subject posture” and “lens posture” when projecting onto the wall surface W2 different from the wall surface W1 is displayed.

[0389] Here, in order to project the projection image onto the wall surface W2, Fig.33 When the third holding portion 50 of the projection lens 3 shown in the figure rotates 90°, the displayed projected image also rotates (rotates 90°). Fig.56 The OSD image shown in the figure notifies an example of a change in the posture of the projected image when the rotation state of the projection lens 3 is changed. Fig.66From the OSD image shown, it can be seen that when the projection image is to be displayed vertically on the wall surface W2, the third holding portion 50 of the projection lens 3 can be rotated by 90 degrees.

[0390] On the other hand, when the horizontally placed projection device body 2 is rotated 90° on the plane on which the projection device body 2 is installed (when the orientation on the plane is changed), information is displayed that the same projection image as the projection image projected on the wall surface W1 is projected on the wall surface W2 different from the wall surface W1. The user can see the projection image by observing the projection image on the wall surface W2. Fig.66 As can be seen from the OSD image shown, when it is desired to display the projection image in a horizontally long manner on the wall surface W2, it is only necessary to rotate it by 90 degrees on the plane where the projection device main body 2 is installed.

[0391] Fig.65 and Fig.66 Although not shown, information related to the change in projection direction or posture of the projected image when the projection device body 2 is switched from horizontal to vertical is displayed (vertical length, horizontal length, rotation angle, etc.), thereby being able to serve as auxiliary information for projecting the desired projection image onto the projection surface.

[0392] exist Fig.65 and Fig.66 In the embodiment shown, the auxiliary information that assists the operation of the "body posture" and the "lens posture" is notified to the user through the OSD image. However, the projection device 1 is not limited to the notification unit using the OSD image. When the projection device 1 has a display such as a liquid crystal monitor, the auxiliary information can also be displayed through the display (notification unit). In addition, when the projection device 1 has a sound notification function, the auxiliary information can also be notified through the sound notification function.

[0393] <Projection device kit>

[0394] The projection device kit comprises a projection device 1 and auxiliary information (for example, Fig.65 and Fig.66 The auxiliary information shown in the figure) is formed on the information medium.

[0395] In the case where the auxiliary information is recorded in the information medium, the projection device 1 of the projection device kit may not have the function of notifying the user through an OSD image. Fig.65 and Fig.66 The function of the auxiliary information shown above is to assist the operation of the "subject posture" and "lens posture".

[0396] The information medium includes, for example, a recording medium on which digital information is recorded, such as a paper medium, a CD-ROM (Compact Disc Read Only Memory), and a DVD (Digital Versatile Disc).

[0397] The information medium can be packaged together with the projection device 1 and circulated as a projection device kit.

[0398] The user can acquire, from the information medium, auxiliary information that assists the operation of projecting a projection image on an arbitrary projection surface in a desired posture.

[0399] Furthermore, the information recorded in the information medium is not limited to the auxiliary information itself, but also includes access information (for example, URL (Uniform Resource Locator)) for accessing a website and acquiring the auxiliary information from the website.

[0400] [Implementation Method of Image Shift Correction]

[0401] Next, the projection lens 3 is moved relative to Fig.35 The lens shift mechanism 80 (see FIG. 1 ) for moving the electro-optical element DMD22B shown in FIG. Fig.40 ) is described below.

[0402] Fig.67 1 is a schematic diagram showing the displacement state of the projection device 1 and the projection image when the projection device body 2 is placed horizontally and the posture of the projection lens 3 changes from the second lens posture to the sixth lens posture (lens posture No. 2 to 6). In addition, the stereoscopic diagrams of the projection device 1 when the projection device body 2 is placed horizontally and the posture of the projection lens 3 changes from the second lens posture to the sixth lens posture are shown as follows: Figure 8 to Figure 12 shown.

[0403] in addition, Fig.68 1 is a schematic diagram showing the displacement state of the projection device 1 and the projection image when the projection device body 2 is placed horizontally and the posture of the projection lens 3 is changed from the seventh lens posture to the twelfth lens posture (lens posture No. 7 to 12). In addition, the stereoscopic diagrams of the projection device 1 when the projection device body 2 is placed horizontally and the posture of the projection lens 3 is changed from the seventh lens posture to the twelfth lens posture are respectively as shown in FIG. Figure 13 to Figure 18 shown.

[0404] on the other hand, Fig.69 1 is a schematic diagram showing the displacement state of the projection device 1 and the projection image when the projection device body 2 is placed vertically and the posture of the projection lens 3 is changed from the second lens posture to the sixth lens posture (lens posture No. 2 to 6). In addition, the stereoscopic diagrams of the projection device 1 when the projection device body 2 is placed vertically and the posture of the projection lens 3 is changed from the second lens posture to the sixth lens posture are shown as follows: Figure 20 to Figure 24 shown.

[0405] in addition, Fig.70 1 is a schematic diagram showing the displacement state of the projection device 1 and the projection image when the projection device body 2 is placed vertically and the posture of the projection lens 3 is from the seventh lens posture to the twelfth lens posture (lens posture No. 7 to 12). In addition, the stereoscopic diagrams of the projection device 1 when the projection device body 2 is placed vertically and the posture of the projection lens 3 is from the seventh lens posture to the twelfth lens posture are respectively as shown in FIG. Figure 25 to Figure 30 shown.

[0406] Fig.45 The CPU 210 and the shift control unit 262 shown functioning as a control unit drive and control the lens shift mechanism 80 functioning as a shift unit to move the projection lens 3 within a plane intersecting the axial direction of the first rotation axis θ1 .

[0407] By moving the projection lens 3, the image display unit 22 is moved relative to the Fig.35 The position of the first optical axis Z1 of the projection lens 3 shown in the figure changes within a plane perpendicular to the first optical axis Z1 , and the projection image projected from the projection lens 3 can be shifted.

[0408] Figures 67 to 70 The circular area shown indicates the range that can be projected by the projection lens 3, and the rectangular area within the circular area indicates the projected image. By moving the projection lens 3 using the lens shift mechanism 80, the projected image can be shifted within the projectable circular area. In addition, when the projected image is shifted (when the projection lens 3 is moved using the lens shift mechanism 80) beyond the projectable circular area, the projected image emitted from the image display unit 22 interferes with the projection lens 3, and the projected image will produce "vignetting".

[0409] like Figures 67 to 70 As shown, the direction in which the projection image is shifted differs depending on the "lens posture" of the projection lens 3 and the "body posture" of the projection device body 2. The details of the direction in which the projection image is shifted will be described later.

[0410] Next, the definitions of the “lens posture” and the “shift correction direction” for determining the “direction in which the projected image is shifted” will be described.

[0411] Fig.71 This is a diagram that defines the position of the projection lens 3 relative to the projection device main body 2.

[0412] The position of the projection lens 3 relative to the projection device body 2 is defined based on the position of the projection lens 3 relative to the projection device body 2 when the projection device body 2 is placed horizontally. That is, Fig.71 (A) When the projection device body 2 is placed horizontally, the output optical system of the projection lens 3 ( Fig.35 The third optical system (third lens group G33) is located at the lower side relative to the projection device body 2. In this case, the position of the projection lens relative to the projection device body is defined as the lower side in any case where the projection device body 2 is placed horizontally or vertically.

[0413] Likewise, Fig.71 (B) When the projection device body 2 is placed horizontally, the output optical system of the projection lens 3 is located on the upper side relative to the projection device body 2. In this case, the position of the projection lens relative to the projection device body is defined as the upper side regardless of whether the projection device body 2 is placed horizontally or vertically. Fig.71 In (C) and (D), the output optical system of the projection lens 3 is located at the same center of the projection device body 2. In this case, the position of the projection lens relative to the projection device body is defined as the center of the body (same).

[0414] The “position of the projection lens relative to the projection device body” defined as described above is used to determine the direction in which the projected image is shifted as described later.

[0415] According to the above definition, when the lens posture No. of the projection lens 3 is 2, 4, 6, 8 (refer to Fig.67 and Fig.68 ), the position of the projection lens 3 relative to the projection device main body 2 is the "upper side". In addition, when the lens posture No. of the projection lens 3 is 3, 5, 7, or 9, the position of the projection lens 3 relative to the projection device main body 2 is the "lower side". In addition, when the lens posture No. of the projection lens 3 is 10, 11, or 12, the position of the projection lens 3 relative to the projection device main body 2 is the "center position of the main body" (same).

[0416] Fig.72 This is a diagram that defines whether the projection device main body 2 (main body) is present in front of the projection direction.

[0417] exist Fig.72 In the lens postures of (A) and (B), relative to the exit optical system ( Fig.35 The surface of the third optical system third lens group G33) is along Fig.35 A part of the projection device body 2 exists on the emission direction side of the third optical axis Z3. In this lens posture, it is defined that the projection device body exists in front of the projection direction (yes).

[0418] On the other hand, Fig.72 In the lens posture (C), relative to the exit optical system ( Fig.35The surface of the third optical system third lens group G33) is along Fig.35 There is no part of the projection device body 2 on the emission direction side of the third optical axis Z3. In such a lens posture, it is defined as "the projection device body does not exist in front of the projection direction" (no).

[0419] Therefore, when the lens posture No. is 2, 3, 4, 5, 6, and 7, the subject exists in front of the projection direction, and when the lens posture No. is 8, 9, 10, 11, and 12, the subject does not exist in front of the projection direction.

[0420] When the projection device main body 2 is located in front of the projection direction ( Fig.75A , Fig.75B and Fig.76A , Fig.76B When the "subject is in front of the projection direction" is "yes", the projection image may be "vignetted" by the projection device body 2. On the other hand, when the subject is not in front of the projection direction ( Fig.75A , Fig.75B and Fig.76A , Fig.76B When "the subject is in front of the projection direction" is "no", "vignetting" of the projection image caused by the projection device body 2 does not occur.

[0421] This information of whether a subject exists in front of the projection direction is used to determine the direction in which to shift the projected image.

[0422] Fig.73 This is a diagram that defines the "shift correction direction" of the projected image.

[0423] Fig.73 The upper part of Fig.67 The projection image when the lens posture No. of the projection lens 3 shown is 6, and Fig.73 The lower part of Fig.68 The projected image when the lens posture No. 7 of the projection lens 3 is shown.

[0424] Fig.73 The projected images shown are projected lengthwise, but Fig.73 As shown, the "shift correction direction" of the projected image is defined based on the actual "projected image".

[0425] For example, about Fig.73 The "shift correction direction" relative to the "projected image" in the upper section is Fig.73 On the paper, the shift correction direction when the "projection image" is shifted to the right is upper, and the shift correction direction when the "projection image" is shifted to the left is lower. Fig.73On the paper, the shift correction direction when the "projected image" is shifted upward is left (left), and the shift correction direction when the "projected image" is shifted downward is right (right).

[0426] <Basic viewpoint on the direction of displacement of the projected image when the projection device body is placed horizontally>

[0427] (1) When "vignetting" caused by a subject occurs on the projected image, the image sensor is shifted in a direction to reduce the "vignetting".

[0428] (2) When the projection image is projected onto a wall surface, the projection image is shifted in a direction in which the projection image moves away from the subject.

[0429] The projection lens is above the main body: the "projected image" is shifted upward (as mentioned above, please note that the shift direction of the "projected image" reference and the "shift correction direction" are not necessarily the same.)

[0430] The projection lens is below the subject: the "projected image" is shifted downward

[0431] The projection lens is in the center of the subject: The "projected image" is shifted upward (in the direction away from the floor, considering that it is basically placed on the floor.)

[0432] (3) When a projection image is projected onto a ceiling or the floor, the projection image is displaced in a direction away from the subject.

[0433] When the "shift correction direction" is determined based on (1), (2), and (3) above, there may be situations where (1) and (2) or (1) and (3) are opposite, but in this case, the "shift correction direction" based on (1) is given priority.

[0434] According to the basic view of "shift direction" mentioned above, Fig.67 and Fig.68 The "shift correction direction" when the lens posture No. is shown is set to the upward direction when it is 2 or 9, and the "shift correction direction" when it is 3, 8 or 10 is set to the downward direction. In addition, the "shift correction direction" when the lens posture No. is 4, 5, 11 or 12 is set to the right direction, and the "shift correction direction" when the lens posture No. is 6 or 7 is set to the left direction.

[0435] Fig.67 and Fig.68 When the lens posture No. is 2 to 7, the subject is in front of the projection direction, and "vignetting" may occur in the projected image. Therefore, in the case of these lens postures, the projected image is shifted in the direction to reduce "vignetting". In addition, when the lens posture No. is 6 and 7, "vignetting" is also generated in the projected image after the shift correction.

[0436] Fig.67 and Fig.68 When the lens posture No. is 8 to 10, the subject does not exist in front of the projection direction, and the projection image is projected toward the wall. Fig.71 According to the definition of "position of projection lens relative to the main body" shown in the figure, the projection image is shifted in the direction in which the projection image is away from the projection device main body 2. When the projection lens 3 is located on the upper side of the projection device main body 2 (lens posture No. 8) and when it is located in the center of the main body of the projection device main body 2 (lens posture No. 10), the projection image is shifted in the upward direction (according to the definition of "shift correction direction") based on the "projection image" actually projected on the wall. In addition, when the projection lens 3 is located on the lower side of the projection device main body 2, the projection image is shifted in the downward direction (according to the definition of "shift correction direction") based on the "projection image" actually projected on the wall.

[0437] Fig.67 and Fig.68 When the lens posture No. is 11 or 12, the projection image is projected toward the ceiling or floor respectively because the main body is not in front of the projection direction. Therefore, in these lens postures, the projection image is shifted away from the projection device main body 2.

[0438] <Basic viewpoint on the direction of displacement of the projected image when the projection device body is placed vertically>

[0439] (1) When "vignetting" caused by a subject occurs on the projected image, the image sensor is shifted in a direction to reduce the "vignetting".

[0440] (2) When a projection image is projected onto a wall surface, the projection image is displaced in a direction away from the floor.

[0441] (3) When a projection image is projected onto a ceiling or the floor, the projection image is displaced in a direction away from the subject.

[0442] According to the basic viewpoint of the above-mentioned “shift direction”, the lens posture No. of the projection lens 3 is Fig.69 and Fig.70 The "shift correction direction" shown in the figure is set to the upward direction when the lens posture No. is 2, 5, and 9, and the "shift correction direction" is set to the downward direction when the lens posture No. is 3, 4, and 8. In addition, the "shift correction direction" when the lens posture No. is 11 and 12 is set to the right direction, and the "shift correction direction" when the lens posture No. is 6, 7, and 10 is set to the left direction.

[0443] The lens posture No. of the projection lens 3 is Fig.69 and Fig.70In the cases 2 to 7 shown, "the subject is in front of the projection direction", and "vignetting" may occur in the projected image. Therefore, in the case of these lens postures, the projected image is shifted in the direction to reduce "vignetting". In addition, in the case of lens posture No. 6 and 7, "vignetting" also occurs in the projected image after the shift correction.

[0444] When the projection lens 3 has lens posture No. 8 to 10, the projection device body 2 does not exist in front of the projection direction, and the projection image is projected toward the ceiling. Therefore, in these lens postures, the projection image is shifted in a direction away from the projection device body 2.

[0445] When lens posture No. 11 or 12 is "lens posture", "the subject does not exist in front of the projection direction", and the projection image is projected toward the wall. Therefore, in these lens postures, the projection image is shifted in the direction away from the floor.

[0446] <Displacement amount>

[0447] Next, the shift amount of the projected image (the movement amount of the projection lens 3 by the lens shift mechanism 80) will be described.

[0448] Fig.74 This is a plan view of the casing 14 of the projection apparatus main body 2 for explaining the amount of displacement of the projected image when the projection apparatus main body is placed horizontally (a view of the casing 14 viewed from above when the projection apparatus main body 2 is placed horizontally).

[0449] like Fig.74 As shown, the housing 14 has a base portion 14G and a protrusion 14H protruding from the base portion 14G, and a recessed portion 15 adjacent to the protrusion 14H in the first direction is formed. The projection lens 3 is disposed in the recessed portion 15 .

[0450] exist Fig.74 The first direction in which the protrusion 14H is adjacent to the recess 15 includes the 1A direction as one of the first directions and the 1B direction as the other, and the protrusion 14H is located on the 1A direction side with respect to the recess 15 .

[0451] The second direction intersecting the first direction includes a 2A direction as one of the second directions and a 2B direction as the other, and the base portion 14G is located on the 2A direction side.

[0452] In the projection device 1 having the housing 14 of the above-mentioned shape and the projection lens 3 disposed in the recessed portion 15, when the "position of the projection lens relative to the projection device body" is at the upper side or the lower side, and when the projection lens 3 projects the projection image in the 1A direction, the 1B direction, and the 2A direction, the "projection device body is present in front of the projection direction", and "vignetting" occurs on the projection image. In addition, when the projection lens 3 projects the projection image in the 1A direction, the 1B direction, the 2A direction, and the 2B direction, the lens posture No. of the projection lens 3 is 6, 4, 2, and 8, respectively (refer to Fig.67 and Fig.68 ).

[0453] Therefore, in Fig.74 When the upper surface of the housing 14 shown is set as a "reference plane", the displacement direction of the projected image is different when the projection direction of the projection lens 3 is in the same plane as the "reference plane" and when it is in a direction intersecting the direction in the same plane.

[0454] That is, in Fig.71 In the case of the "lens posture" shown in (A) and (B) (refer to Fig.67 5, 6), the projection image is displaced in the direction within the same plane as the "reference plane" and in the direction perpendicular to the "reference plane". Fig.71 In the case of the "lens posture" shown in (C) and (D) (refer to Fig.68 The lens posture No. 11, 12) can only shift the projected image in the direction within the same plane as the "reference plane", so it is shifted in the direction within the same plane as the "reference plane".

[0455] Furthermore, when the projection direction of the projection lens 3 is a direction in the same plane as the “reference plane” of the projection device body 2, in order to reduce “vignetting” of the projected image, the projected image is shifted in a direction intersecting with the direction in the same plane as the “reference plane”. Furthermore, when the projection direction of the projection lens 3 is a direction intersecting with the “reference plane” of the projection device body 2, the projected image is shifted in a direction in the same plane as the “reference plane”.

[0456] In addition, it is preferred to make the shift amount of the projected image different according to the "lens posture". When the projection direction of the projection lens 3 is on the side where the housing 14 is located, the shift amount of the projected image is increased compared to when it is on the opposite side to the side where the housing 14 is located. Regarding the shift amount of the projected image, since the presence or absence of "vignetting" of the projected image and the size of "vignetting" are different according to the "lens posture", it is preferred to make the shift amount of the projected image different according to the presence or absence of "vignetting" and the size of "vignetting". That is, the larger the "vignetting", the larger the shift amount of the projected image, and the smaller the "vignetting" of the projected image.

[0457] exist Fig.74 In the example shown, the "vignetting" when the projection lens projects the projection image in the 1A direction is larger than the "vignetting" when the projection lens projects the projection image in the 1B direction and the 2A direction, and no "vignetting" occurs when the projection image is projected in the 2B direction.

[0458] Therefore, when the projection lens 3 projects toward the 1A direction, the shift amount of the projection lens 3 is increased compared to when the projection lens 3 projects toward the 1B direction. In addition, when the projection lens 3 projects toward the 2A direction, the shift amount of the projection lens 3 is increased compared to when the projection lens 3 projects toward the 2B direction. Similarly, when the projection lens 3 projects toward the 1B direction, the shift amount of the projection lens 3 is increased compared to when the projection lens 3 projects toward the 2B direction.

[0459] exist Fig.74 In the example shown, the shift amount when the projection lens 3 projects the projection image toward the 1A direction is set to +3, the shift amount when the projection image is projected toward the 1B direction and the 2A direction is set to +2.5, and the shift amount when the projection image is projected toward the 2B direction is set to +2, but these numerical values ​​representing the shift amounts (+3, +2.5, +2) merely represent the relative sizes of the shift amounts.

[0460] The shift amount of the projected image is not limited to being different depending on the “lens posture”. For example, when the zoom optical system of the projection lens 3 is wide-angle, the shift amount may be larger than when the zoom optical system is telephoto.

[0461] <Correction of image rotation and shift>

[0462] 75 to 78 are graphs summarizing image rotation correction and shift correction.

[0463] Fig.75A , Fig.75B and Fig.76A , Fig.76B The image rotation correction and shift correction etc. are shown for each of the 12 lens postures when the projection device body 2 is placed horizontally. Fig.77A , Fig.77B and Fig.78A , Fig.78B The figure shows rotation correction, shift correction, etc. of the image for each of 12 lens postures when the projection device body 2 is placed vertically.

[0464] When the lens posture No. of the projection lens 3 is 1, the projection lens 3 is in a stored state where projection is not possible, and therefore, the rotation correction and the shift correction of the image are not performed.

[0465] In addition, according to Fig.75A , Fig.75B and Fig.76A , Fig.76B When the projection device body 2 is placed horizontally and the lens posture No. 11 and 12 of the projection lens 3, the projection image is projected onto the ceiling and the ground, respectively, but the "shift amount" at this time is set to + 1. This is because in the case of the "lens posture" of the lens posture No. 11 and 12, "vignetting" of the projection image does not occur.

[0466] Similarly, according to Fig.77A , Fig.77B and Fig.78A , Fig.78B When the projection device body 2 is placed vertically and the lens posture No. of the projection lens 3 is 2 or 3, the projection image is projected onto the ground, and when the lens posture No. is 8 to 10, the projection image is projected onto the ceiling, but the "shift amount" of the former is set to +1.5, and the "shift amount" of the latter is set to +1. In addition, these "shift amounts" are only examples and are not limited to this. In addition, the "shift amount" can also be fixed to the maximum value within the shiftable range. Moreover, according to the "lens posture", a method of not performing shift correction can also be considered.

[0467] When the projection device body 2 is placed horizontally, the projection device body 2 is usually provided with the horizontal placement legs 12 facing the ground ( Figure 1 ), but the horizontal leg 12 may also be arranged toward the ceiling side.

[0468] When the projection device body 2 is placed with the horizontal leg 12 facing the ceiling, the rotation correction amount of the OSD image needs to be rotated by ±180° compared to the case where the horizontal leg 12 is placed on the ground, and similarly, the correction amount of the projected image needs to be rotated by ±180° compared to the case where the horizontal leg 12 is placed on the ground. In addition, the "body posture" when the projection device body 2 is placed with the horizontal leg 12 facing the ceiling can be detected by the body posture detection unit 23 composed of an acceleration sensor.

[0469] Fig.79 FIG. 2 is a flowchart showing an embodiment of image shift correction performed by the CPU 210 and the shift control unit 262. Fig.58 The common parts of the flowcharts showing the embodiments of “rotation correction of an image” are denoted by the same step numbers, and their detailed descriptions are omitted.

[0470] exist Fig.79In the process of FIG. 1 , when the CPU 210, which functions as a control unit for image shift correction, determines that the projection lens 3 is in the locked state and the projection lens 3 is not in the stored state through the processing of steps S300, S302, and S304, it then determines whether the "subject posture" is horizontal (step S330). The "subject posture" can be determined based on the detection signal from the subject posture detection unit 23.

[0471] When the “body posture” is horizontal, the CPU 210 determines whether the current “lens posture” is included in lens postures No. 2 and No. 9 (step S332 ).

[0472] When the shift control unit 262, which functions as a control unit for performing image shift correction, inputs a judgment result from the CPU 210 that the "lens posture" is included in lens postures No. 2 and No. 9, it drives and controls the lens shift mechanism 80 to shift the projected image in the upward direction (the upward direction in the definition of the "shift correction direction") (step S338).

[0473] When the current "lens posture" is not included in lens postures No. 2 and No. 9, CPU 210 determines whether it is included in lens postures No. 3, No. 8, and No. 10 (step S334). When the shift control unit 262 receives the judgment result that the "lens posture" is included in lens postures No. 3, No. 8, and No. 10 from CPU 210, it drives and controls the lens shift mechanism 80 to shift the projected image in the downward direction defined by the "shift correction direction" (step S340).

[0474] When the current "lens posture" is not included in lens postures No. 3, No. 8, and No. 10, the CPU 210 determines whether it is included in lens postures No. 6 and No. 7 (step S336). When the shift control unit 262 receives the judgment result that the "lens posture" is included in lens postures No. 6 and No. 7 from the CPU 210, it drives and controls the lens shift mechanism 80 to shift the projected image to the left direction defined by the "shift correction direction" (step S348).

[0475] When the current "lens posture" does not match any lens posture No. through the determination in steps S332, S334, and S336 (in step S336 ("No")), the current "lens posture" is any one of the remaining lens postures No. 4, No. 5, No. 11, and No. 12. In this case, the shift control unit 262 drives and controls the lens shift mechanism 80 to shift the projection image to the right direction defined by the "shift correction direction" (step S350).

[0476] On the other hand, when it is determined in step S330 that the “body posture” is the vertical position, the CPU 210 determines whether the current “lens posture” is included in lens postures No. 2, No. 5, and No. 9 (step S342 ).

[0477] When the CPU 210 inputs the determination result that the “lens posture” is included in No. 2, No. 5, and No. 9, the shift control unit 262 drives and controls the lens shift mechanism 80 to shift the projection image in the upward direction defined by the “shift correction direction” (step S338 ).

[0478] When the current "lens posture" is not included in lens postures No. 2, No. 5, and No. 9, the CPU 210 determines whether it is included in lens postures No. 3, No. 4, and No. 8 (step S344). When the shift control unit 262 receives the judgment result that the "lens posture" is included in lens postures No. 3, No. 4, and No. 8 from the CPU 210, it drives and controls the lens shift mechanism 80 to shift the projected image in the downward direction defined by the "shift correction direction" (step S340).

[0479] When the current "lens posture" is not included in lens postures No. 3, No. 4, and No. 8, the CPU 210 determines whether it is included in lens postures No. 6, No. 7, and No. 10 (step S346). When the shift control unit 262 receives the judgment result that the "lens posture" is included in lens postures No. 6, No. 7, and No. 10 from the CPU 210, it drives and controls the lens shift mechanism 80 to shift the projected image to the left direction defined by the "shift correction direction" (step S348).

[0480] When the current "lens posture" does not match any lens posture No. through the determination in steps S342, S344, and S346 (in step S346 ("No")), the current "lens posture" is any one of the remaining lens postures No. 11 and No. 12. In this case, the shift control unit 262 drives and controls the lens shift mechanism 80 to shift the projection image to the right direction defined by the "shift correction direction" (step S350).

[0481] In addition, Fig.79In the embodiment shown, the projected image is shift-corrected based on the results of the determination of the "lens posture" and the "subject posture", but the information of the shift correction direction of the projected image may be obtained from a table for shift correction. In the table for shift correction, the relationship between a plurality of "lens postures" and "subject postures" that can be selected when projecting a projected image determined by the detection signals of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the subject posture detection unit 23 and the shift correction direction (including the shift amount) of the projected image is previously registered. Then, the information of the shift correction direction of the projected image may be obtained from the table based on the detection signals of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the subject posture detection unit 23.

[0482] In addition, each of the first rotational position detection unit 70A, the second rotational position detection unit 70B, and the subject posture detection unit 23 also includes a receiving unit that receives “lens posture” and “subject posture” instructions from the user.

[0483] Moreover, in the present embodiment, it is provided that when performing displacement correction of the projection image, the projection lens is moved within a plane intersecting the axial direction of the rotation axis (first rotation axis) of the projection lens. However, it is also possible not to move the projection lens but to move the DMD (electro-optical element) side that emits the projection image to the projection lens. In short, it is sufficient to move the projection lens and the electro-optical element relative to each other.

[0484] Although the embodiments and other aspects of the present invention have been described above, the present invention is not limited to the above embodiments and aspects, and various modifications can be made without departing from the spirit of the present invention. In addition, the above embodiments and aspects can also be combined.

[0485] [Modification of Locking Mechanism]

[0486] The first locking mechanism 60A and the second locking mechanism 60B adopted in the projection device 1 of the above-mentioned embodiment are an example of a locking mechanism. About the first locking mechanism 60A, as long as the structure that can lock the second holding part 40 in the desired position gets final product. Similarly, about the second locking mechanism 60B, as long as the structure that can lock the third holding part 50 in the desired position gets final product. For example, also can be set to the structure that utilizes pin and pin hole to lock.

[0487] [Modification of the lens shift mechanism]

[0488] The lens shift mechanism 80 used in the projection device 1 of the above embodiment is an example of a shift unit. The shift unit is not limited to shifting the entire projection lens, but may also shift a portion of the projection lens, or may shift the image display unit 22 relative to the projection lens 3. In addition, a known shift mechanism may be used instead of the lens shift mechanism 80 of the above structure.

[0489] Explanation of symbols

[0490] 1 Projection device

[0491] 2 Projection device body

[0492] 3Projection lens

[0493] 6Main operating part

[0494] 6A power switch

[0495] 6B MENU key

[0496] 6C Cross Key

[0497] 6D ENTER key

[0498] 6E BACK button

[0499] 7 Gas supply department

[0500] 8 Exhaust

[0501] 9 Power connector

[0502] 10 Video input terminals

[0503] 11Lock release operation unit

[0504] 11A first lock release switch

[0505] 11B Second lock release switch

[0506] 12 horizontal leg position

[0507] 13 Legs for vertical placement

[0508] 14 Shell

[0509] 14A Shell front

[0510] 14B Shell back

[0511] 14C left side of the shell

[0512] 14D right side of the shell

[0513] 14E Shell upper surface

[0514] 14F Shell bottom

[0515] 15 Depression

[0516] 15A inner wall surface

[0517] 15a recess

[0518] 18 Lens cover

[0519] 18A lens cover front

[0520] 18D lens cover right side face

[0521] 18E lens cover upper surface

[0522] 18F lens cap bottom

[0523] 20 Light source

[0524] 20A laser light source

[0525] 20B fluorescent wheel

[0526] 20C reflector

[0527] 20D color wheel

[0528] 21 Lighting Department

[0529] 21A Rod Integrator

[0530] 21B lens

[0531] 21C lens

[0532] 21D lens

[0533] 21E Reflector

[0534] 21F reflector

[0535] 22 Image display unit

[0536] 22A Total Reflection Prism

[0537] 22B DMD

[0538] 23 Subject posture detection unit

[0539] 30 lens barrel

[0540] 31 first holding part

[0541] 32 fixed frame

[0542] 32A flange

[0543] 32B straight slot

[0544] 32C first support roller

[0545] 32D claw guide groove

[0546] 32E first locking groove

[0547] 33 Cam frame

[0548] 33A First cam groove

[0549] 33B Second cam groove

[0550] 34First lens holding frame

[0551] 35 Second lens holding frame

[0552] 35A first cam pin

[0553] 35B Second cam pin

[0554] 36Third lens holding frame

[0555] 37 zoom gear frame

[0556] 37A Gear Department

[0557] 38 zoom motor

[0558] 38A zoom drive gear

[0559] 38B bracket

[0560] 40 second holding part

[0561] 41First rotation frame

[0562] 41A First guide groove

[0563] 42 first reflector holding frame

[0564] 43 lens holding frame

[0565] 43A Second guide groove

[0566] 50 third holding unit

[0567] 51 Second rotation frame

[0568] 51A Second support roller

[0569] 51B claw guide groove

[0570] 51C Second locking groove

[0571] 52 second reflector holding frame

[0572] 53 spiral frame

[0573] 53A female thread

[0574] 54 Final lens holding frame

[0575] 55 Focus lens holding frame

[0576] 55A male thread

[0577] 55B Connecting pin

[0578] 56 Focus Gear Frame

[0579] 56A Gear Department

[0580] 58 Focus Motor

[0581] 58A Focus drive gear

[0582] 58B bracket

[0583] 60 locking mechanism

[0584] 60A first locking mechanism

[0585] 60B Second locking mechanism

[0586] 61A First locking claw

[0587] 61B Second locking claw

[0588] 62A First locking claw body

[0589] 62B Second locking claw body

[0590] 63A Arm

[0591] 64A Claw

[0592] 64B claw

[0593] 65A connection

[0594] 65B connection part

[0595] 66A Long hole

[0596] 66B Long hole

[0597] 67A screw

[0598] 67B screw

[0599] 68A First Solenoid

[0600] 68B Second solenoid

[0601] 68a plunger

[0602] 68b plunger

[0603] 70A First rotation position detection unit

[0604] 70B Second rotation position detection unit

[0605] 71A First Optical Scale

[0606] 71B Second optical scale

[0607] 72A First Read Sensor

[0608] 72B Second reading sensor

[0609] 80 lens shift mechanism

[0610] 81 substrate

[0611] 81A base opening

[0612] 81C first slide rail

[0613] 82 first sliding plate

[0614] 82A First Opening

[0615] 82B first groove

[0616] 82C second slide rail

[0617] 83 Second sliding plate

[0618] 83A Second opening

[0619] 83B Second groove

[0620] 83M Installation Department

[0621] 84 first sliding plate driving mechanism

[0622] 85 Second sliding plate driving mechanism

[0623] 86 First shift motor

[0624] 86A first drive shaft

[0625] 87First rotation axis

[0626] 87A first threaded portion

[0627] 88 First moving part

[0628] 88A First moving part body

[0629] 88B first connection part

[0630] 89 first worm gear

[0631] 89A first worm

[0632] 89B first worm gear

[0633] 90 Second shift motor

[0634] 90A Second drive shaft

[0635] 91 Second rotation axis

[0636] 91A Second threaded portion

[0637] 92 Second moving part

[0638] 92A Second moving part body

[0639] 92B Second connecting part

[0640] 93 Second worm gear

[0641] 93A Second Worm

[0642] 93B Second worm gear

[0643] 98 Projected images

[0644] 99A OSD Image

[0645] 99B OSD Image

[0646] 99C OSD Image

[0647] 99D OSD Image

[0648] 99E OSD Image

[0649] 99F OSD Image

[0650] G1 first optical system

[0651] G11 The first optical system, the first lens group

[0652] G12 The first optical system, the second lens group

[0653] G13 The third lens group of the first optical system

[0654] G14 The fourth lens group of the first optical system

[0655] G2 second optical system

[0656] G21 The first lens group of the second optical system

[0657] G22 Second optical system second lens group

[0658] G3 third optical system

[0659] G31 The first lens group of the third optical system

[0660] G32 The third optical system second lens group

[0661] G33 The third optical system, the third lens group

[0662] R1 first reflector

[0663] R2 Second reflector

[0664] S100 to S270 are steps of control related to the projection lens

[0665] S300 to S350 are steps of control related to the projection lens.

[0666] X-arrow

[0667] Y Arrow

[0668] Z1 first optical axis

[0669] Z2 second optical axis

[0670] Z3 third optical axis

[0671] αFirst direction

[0672] β Second direction

[0673] θ1 first rotation axis

[0674] θ2 Second rotation axis

Claims

1. A projection device, wherein: have: case; A projection lens having a holding portion and rotatably mounted on the housing; a detection portion that detects a rotation state of the holding portion; An image output unit that outputs a composite image of a first image output from an external device and a second image including text output from an internal memory to the projection lens; as well as a control unit that, when the holding unit of the projection lens rotates, performs rotation correction on the second image and the first image in directions different from each other based on the detection result of the detection unit, When the first image projected by the projection lens is displayed in a vertically long vertical direction, the control unit performs rotation correction on the first image so that the up-down direction of the first image faces a preset direction, and performs rotation correction on the second image so that characters of the second image stand upright.

2. The projection device according to claim 1, wherein: The correction angle of the rotation correction of the second image performed by the control unit is an angle at which the characters of the second image are made upright.

3. The projection device according to claim 1 or 2, wherein: The correction angle of the rotation correction of the second image performed by the control unit includes an angle other than 0° and 180°.

4. The projection device according to claim 3, wherein: The correction angle of the rotation correction of the second image performed by the control unit is 90°, 180°, or 270°.

5. The projection device according to claim 1 or 2, wherein: The image output unit includes an electro-optical element for outputting the synthesized image to the projection lens. The control unit performs rotation correction on the second image based on the detection result of the detection unit and outputs the second image to the electro-optical element.

6. The projection device according to claim 1 or 2, wherein: The device comprises: a posture detection unit for detecting the posture of the projection device; The control unit performs rotation correction on the text of the second image based on the detection results of the detection unit and the posture detection unit.

Images