JP7105259B2 - projection device - Google Patents

Description

The present invention relates to projection devices.

2. Description of the Related Art As a projection apparatus (projector) for projecting an image or the like onto a screen, a wall surface, or the like, a type in which the projection direction is fixed has conventionally been used, but in recent years, a projection apparatus capable of changing the projection direction has been developed. For example, Patent Literature 1 below describes a projection device capable of changing the projection direction by rotating a projection lens having a holding portion. Further, Japanese Patent Application Laid-Open No. 2002-200001 describes that a shift mechanism is used to move a mount portion of a projection lens with respect to a housing.

WO2018/055964

The technique described in Japanese Patent Laid-Open No. 2002-200000 only describes changing the rotational state and the moving state of the projection lens, and the control of the rotational state and the moving state in consideration of the relationship with the light source and the power source, or the control of the rotational state and the movement state. The relationship between dynamic and moving states was not considered.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection apparatus capable of appropriately controlling the rotation state and/or movement state of a projection lens.

To achieve the above object, a projection device according to a first aspect of the present invention includes a housing, a light source, a control section, a projection lens attached to the housing, and a holding section; a projection lens having a detection unit that detects the rotation state of the holding unit, an output optical system, and a lock mechanism unit that locks or unlocks the rotation of the holding unit; When the rotating state is the retracted state in which the output optical system faces the housing, the light source is turned off. If the light source is turned on while the output optical system and the housing face each other, the light emitted from the output optical system hits the housing, raising the temperature of the projection lens and housing, which may have an adverse effect. When the rotating state is the retracted state as in mode 1, the controller turns off the light source, thereby preventing adverse effects.

As described above, according to the projection device according to the first aspect, it is possible to appropriately control the light source according to the rotational state of the projection lens (rotational relationship of the projection lens with respect to the housing).

A projection device according to a second aspect, in the first aspect, includes a power source, and the control section turns off the power source when the holding section is in the retracted state. According to the second aspect, the power supply can be appropriately controlled according to the rotational state of the projection lens.

In order to achieve the above-described object, a projection device according to a third aspect of the present invention includes a housing, a power source, a control section, and a holding section attached to the housing, and detecting a rotation state of the holding section. an output optical system; a projection lens that locks or unlocks the rotation of the holder; and a movement mechanism that moves the projection lens with respect to the housing. , the control unit moves the moving mechanism to the retracted position when the power is turned off. Depending on the rotational state of the projection lens, the projection range may be blocked by the housing during projection (so-called vignetting may occur). Although vignetting can be suppressed, this movement causes positional deviation between the projection lens and the housing. Therefore, in the third aspect, when an operation to turn off the power is received, the moving mechanism is moved to the retracted position and then the power is turned off. It is possible to prevent collisions and damage caused by misalignment. Thus, according to the third aspect, it is possible to appropriately control the power supply according to the positional relationship between the projection lens and the housing (movement state of the projection lens). Note that it is preferable to store the projection lens in a state in which the moving mechanism has moved to the above-described stored position (for example, the output optical system and the housing are placed in a stored state facing each other as in the first mode).

A projection device according to a fourth aspect is the projection lens according to the third aspect, wherein the side surface of the cover member and the side surface of the housing are coplanar when the moving mechanism is in the retracted position. . According to the fourth aspect, when the moving mechanism is in the retracted position, the side surface of the cover member and the side surface of the housing are on the same plane, so that the projection device can be stably installed and stored. Also, it is possible to prevent one surface from protruding, colliding, and being damaged. It should be noted that the term “same plane” is not limited to a completely same plane, but also includes a case in which the two surfaces are deviated to the extent that stable installation and storage are not hindered.

A fifth aspect of the projection apparatus according to the third or fourth aspect is that the control unit turns off the power, and the rotating state of the holding unit is set so that the output optical system faces the housing. Otherwise, the movement position of the movement mechanism is maintained. According to the fifth aspect, when the power is turned off in a state other than the retracted state, the movement mechanism is not moved (the movement position is maintained), so the movement state of the projection lens is appropriately controlled. When the projection device is used again under the same conditions (installation location, rotation state, etc.), it can be used quickly.

In any one of the third to fifth aspects, the projection device according to the sixth aspect is configured such that, when an operation to turn off the power is input, the control unit performs a step of turning off the projection lens before turning off the power. Notifies information about changes in rotation state. For example, it is possible to notify whether or not it is necessary to change the rotation state and the content of the change, and the user can recognize the notified information.

A projection apparatus according to a seventh aspect is the sixth aspect, wherein the information is information regarding a change to a housed state in which the output optical system in the rotating state faces the housing. In the seventh aspect, for example, it is possible to notify information about the procedure for changing the rotating state to the retracted state.

To achieve the above object, a projection device according to an eighth aspect of the present invention comprises a housing, a light source, a control section, a projection lens attached to the housing, and a holding section, and and a moving mechanism for moving the projection lens with respect to the housing. Information on the movement position of the projection lens is stored, and the control section moves the projection lens to the stored movement position after the rotation state is detected by the detection section. According to the eighth aspect, since the projection lens is moved to the movement position according to the rotation state, appropriate control is performed in consideration of the relationship between the two to quickly move the projection lens to the movement position according to the rotation state. be able to.

A projection device according to a ninth aspect is the projection device according to the eighth aspect, further comprising a receiving unit for receiving an operation of the movement mechanism by the user, and the control unit, when the movement position is changed by the operation, stores the stored movement position information. is updated based on the operation. According to the ninth aspect, by updating the movement position information, the user can move the projection lens to a desired movement position, and there is no need to repeat the same operation each time the projection apparatus is used.

As described above, according to the projection apparatus of the present invention, it is possible to appropriately perform control related to the rotation state and/or movement state of the projection lens.

FIG. 1 is a front view of the projection device. FIG. 2 is a rear view of the projection device. FIG. 3 is a left side view of the projection device. FIG. 4 is a right side view of the projection device. FIG. 5 is a plan view (top view) of the projection device. FIG. 6 is a bottom view (bottom view) of the projection device. FIG. 7 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 8 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 9 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 10 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 11 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 12 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 13 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 14 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 15 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 16 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 17 is a perspective view showing an example of use in which the projection device main body is placed horizontally. FIG. 18 is a perspective view showing an example of use in which the main body of the projection apparatus is placed horizontally. FIG. 19 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 20 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 21 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 22 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 23 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 24 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 25 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 26 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 27 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 28 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 29 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 30 is a perspective view showing an example of use in which the projection device main body is placed vertically. FIG. 31 is a plan view showing the schematic configuration inside the projection device main body. FIG. 32 is a diagram showing the lens configuration of the projection lens. FIG. 33 is a perspective view showing the external structure of the lens barrel of the projection lens. FIG. 34 is a perspective view showing the external structure of the lens barrel of the projection lens. FIG. 35 is a cross-sectional view showing the schematic configuration inside the lens barrel of the projection lens. FIG. 36 is an exploded perspective view showing a schematic configuration of the first locking mechanism. FIG. 37 is an exploded perspective view showing a schematic configuration of the second lock mechanism. FIG. 38 is a plan development view showing a schematic configuration of the first optical scale. FIG. 39 is a plan development view showing a schematic configuration of the second optical scale. FIG. 40 is a front view showing a schematic configuration of the lens shift mechanism when the main body of the projection apparatus is placed horizontally. FIG. 41 is a front view showing the support structure of the first slide plate with respect to the base plate. FIG. 42 is a front view showing a structure for supporting the second slide plate with respect to the first slide plate. FIG. 43 is a front view showing a schematic configuration of the first slide plate drive mechanism. FIG. 44 is a front view showing a schematic configuration of the second slide plate drive mechanism. FIG. 45 is a block diagram showing an embodiment of the electrical internal configuration of the projection device. FIG. 46 is a flow chart of the lock state of the holder and the power-on and light source-on control related to the lock state. FIG. 47 is a flowchart (a continuation of FIG. 46) of the lock state of the holding portion and the power-on and light source-on control related to the lock state. FIG. 48 is a flow chart for locking the retainer. FIG. 49 is a flow chart in the case of making it impossible to unlock the holding portion. FIG. 50 is a display example for notifying the reason why the holding unit cannot be unlocked and the unlocking method. FIG. 51 is a flowchart showing a control procedure for locking the holding portion and projecting light. FIG. 52 is an example of notification of the reason why the locked state cannot be achieved and/or the request to put the holding unit into a specific state. FIG. 53 is a flowchart relating to control to turn off the power source and the light source in relation to the rotating state and moving state. FIG. 54 is a display example of a message when it is not necessary to change the rotation state. FIG. 55 is a display example of a message prompting rotation to the reference state. FIG. 56 is a diagram showing an example of an OSD image when turning off the power. FIG. 57 is a flowchart relating to control of movement of the projection lens and update of movement position information. FIG. 58 is a flow chart showing an embodiment of image rotation correction by the CPU and the display control unit. FIG. 59 shows that the projection lens is in lens posture No. 2 is a diagram showing a projection image and an OSD image in case 2; FIG. FIG. 60 shows that the projection lens is at lens posture No. 5 is a diagram showing a projection image and an OSD image in case 5. FIG. FIG. 61 shows that the projection lens is in lens posture No. The projection lens in the case of No. 8 is the lens posture No. 2 is a diagram showing a projection image and an OSD image in case 2; FIG. FIG. 62 shows that the projection lens is at lens posture No. 11 is a diagram showing a projection image and an OSD image in the case of No. 11; FIG. FIG. 63 is a flow chart showing another embodiment of rotation correction of a projection image. FIG. 64 is a diagram summarizing the rotational correction of the projection image to be rotationally corrected. FIG. 65 is a diagram showing an example of an OSD image related to an operation manual displayed by the projection device. FIG. 66 is a diagram showing another example of the OSD image related to the operation manual displayed by the projection device. FIG. 67 shows a case in which the projection device main body is placed horizontally, and lens posture No. FIG. 10 is a schematic diagram showing the shift state of the projection device and the projected image when 2 to 6; FIG. 68 shows a case in which the projection device main body is placed horizontally, and lens posture No. FIG. 10 is a schematic diagram showing a shift state of a projection device and a projected image in the case of 7 to 12; FIG. 69 shows a case in which the projection apparatus main body is placed vertically, and lens posture No. 2 is a schematic diagram showing a shift state of a projection device and a projected image when .times..times..times..times..times..times..times..times..times..times..times. FIG. 70 shows a case in which the projection device main body is placed vertically, and lens posture No. FIG. 10 is a schematic diagram showing a shift state of a projection device and a projected image in the case of 7 to 12; FIG. 71 is a diagram relating to "lens orientation" that defines the position of the projection lens with respect to the projection apparatus main body. FIG. 72 is a diagram relating to the "lens orientation" that defines whether or not the projection apparatus main body exists in front of the projection direction. FIG. 73 is a diagram defining the "shift correction direction" of the projection image. FIG. 74 is a plan view of the housing of the projection apparatus main body used for explaining the amount of shift of the projected image. FIG. 75A shows a case in which the projection device main body is placed horizontally, and lens posture No. 4 is a chart summarizing rotation correction and shift correction of an image in the case of 2 to 6; FIG. 75B shows a case in which the projection device main body is placed horizontally, and lens posture No. FIG. 11 is another chart summarizing rotation correction and shift correction of an image for 2-6; FIG. FIG. 76A shows a case where the projection device main body is placed horizontally, and lens posture No. 10 is a chart summarizing rotation correction and shift correction of an image in the case of 7 to 12; FIG. 76B shows a case in which the projection device main body is placed horizontally, and lens posture No. FIG. 11 is another chart summarizing rotation and shift corrections for images with .DELTA..times.7-12; FIG. 77A shows a case in which the projection device main body is placed vertically, and lens posture No. 4 is a chart summarizing rotation correction and shift correction of an image in the case of 2 to 6; FIG. 77B shows a case in which the projection device main body is placed vertically, and lens posture No. FIG. 11 is another chart summarizing rotation correction and shift correction of an image for 2-6; FIG. FIG. 78A shows a case in which the projection device main body is placed vertically, and lens posture No. 10 is a chart summarizing rotation correction and shift correction of an image in the case of 7 to 12; FIG. 78B shows a case in which the projection device main body is placed vertically, and lens posture No. FIG. 11 is another chart summarizing rotation and shift corrections for images with .DELTA..times.7-12; FIG. 79 is a flow chart showing an embodiment of image shift correction by the CPU and the shift control unit.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the projection apparatus which concerns on this invention is demonstrated in detail, referring an accompanying drawing.

[Appearance Configuration of Projection Device]
FIG. 1 is a front view of the projection device. FIG. 2 is a rear view of the projection device. FIG. 3 is a left side view of the projection device. FIG. 4 is a right side view of the projection device. FIG. 5 is a plan view (top view) of the projection device. FIG. 6 is a bottom view (bottom view) of the projection device.

As shown in FIGS. 1 to 6, the projection device 1 of this embodiment includes a projection device main body 2 and a projection lens 3. As shown in FIGS. The projection lens 3 is configured to be rotatable around a first rotating shaft θ1 and a second rotating shaft θ2, and is configured to be foldable. FIG. 5 shows a state (stored state) in which the projection lens 3 is folded and the output lens portion of the projection lens 3 faces the housing 14 . The projection device 1 has a flat rectangular parallelepiped shape as a whole when the projection lens 3 is housed.

In FIG. 5, the projection device main body 2 has a housing 14 and a recess 15 . The housing 14 has a rectangular parallelepiped shape with one corner portion (right front corner portion) cut away, and has an L-shape as a whole. The notched portion of the projection device main body 2 constitutes a housing portion for the projection lens 3 as a recess portion 15 . The projection lens 3 is placed in the recess 15 and folded to be entirely accommodated in the recess 15 . The tip of the projection lens 3 faces the front inner wall surface 15A of the recess 15 in the folded state (stored state). An inner wall surface 15A on the front side of the recessed portion 15 is provided with a recessed portion 15a in which an output lens portion protruding from the tip of the projection lens 3 is accommodated.

The projection lens 3 rotates about two axes (first rotation axis θ1 and second rotation axis θ2) perpendicular to each other to switch the projection direction. This allows projection in various directions without moving the projection device main body 2 .

The projection lens 3 has a lens cover 18 at its tip. When the projection lens 3 is folded, the lens cover 18 complements the notched corner portion of the projection device main body 2 . That is, the lens cover front surface portion 18A, the lens cover right side surface portion 18D, the lens cover top surface portion 18E, and the lens cover bottom surface portion 18F correspond to the casing front portion 14A, the casing right side surface 14D, and the casing top surface, respectively. It is positioned substantially on the same plane as 14E and the housing bottom surface 14F, and forms a flat rectangular parallelepiped shape together with the projection device main body 2 .

A main body operation section 6 is provided on the housing front portion 14A of the projection device main body 2 . The 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.

The right side surface 14D of the housing of the projection device main body 2 is provided with an air supply section 7 composed of a large number of punched holes. Further, the housing left side portion 14C of the projection device main body 2 is provided with an exhaust portion 8 configured by a large number of punched holes. The projection apparatus main body 2 takes in air for cooling internal devices (light source, etc.) from the air supply section 7 , passes through the inside, and is exhausted from the exhaust section 8 .

A power connector 9 and a video input terminal 10 are provided on the right side surface 14</b>D of the housing of the projection apparatus 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 . Also, the projection device 1 is supplied with a video signal from an external device (for example, a personal computer, etc.) via a cable (not shown) connected to the video input terminal 10 .

The projection lens 3 is provided with a lock mechanism 60 that independently locks rotations about the first rotation axis θ1 and about the second rotation axis. Details of the lock mechanism 60 will be described later. The projection lens 3 is normally locked against rotation about the first rotation axis θ1 and the second rotation axis by the lock mechanism. The projection lens 3 is provided with an unlocking operation section 11 for unlocking the rotation about the first rotation axis θ1 and the second rotation axis.

The unlocking operation section 11 is provided with a first unlocking switch 11A and a second unlocking switch 11B. The first unlock switch 11A unlocks rotation about the first rotation axis θ1. The first unlock switch 11A is configured by a push button having a circular outer shape, and a key top thereof is provided with an LED (light emitting diode). When the first unlocking switch 11A is pressed, the projection lens 3 is unlocked from rotation about the first rotation axis θ1 for a certain period of time (for example, 10 seconds). Therefore, during this period, the projection lens 3 is free to rotate about the first rotation axis θ1. The second unlock switch 11B unlocks the rotation of the projection lens 3 about the second rotation axis θ2. The second unlock switch 11B is composed of a square-shaped push button with an LED on its key top. When the second unlock switch 11B is pressed, the projection lens 3 is unlocked from rotating about the second rotating axis θ2 for a certain period of time (for example, 10 seconds). Therefore, during this period, the projection lens 3 is free to rotate about the second rotation axis θ2.

In the projection device 1 of this embodiment, the projection device main body 2 can be placed horizontally and vertically. As shown in FIG. 6, the housing bottom portion 14F of the projection device main body 2 is provided with three lateral placement leg portions 12 that serve as grounding portions when the projection device main body 2 is placed laterally. In addition, the rear surface portion 14B of the housing of the projection device main body 2 is provided with four legs 13 for vertical placement, which serve as grounding portions when the projection device main body 2 is placed vertically.

7 to 18 are perspective views showing examples of use when the projection device main body is placed horizontally. The rotation direction of the first rotation axis θ1 is based on the case viewed from the housing front portion 14A side as shown in FIG. A case viewed from the right side portion 14D is used as a reference. Also, “horizontal placement” refers to the case where the largest surface of the housing 14 (in this embodiment, the bottom surface of the housing 14F or the top surface of the housing 14E) intersects the direction of gravity.

FIG. 7 shows the storage state when the projection device main body 2 is laid horizontally. As shown in the figure, the projection lens 3 is housed in the recess 15 of the projection device main body 2 in the housed state.

FIG. 8 shows a first usage pattern in which the projection apparatus main body 2 is placed horizontally to project backward. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 from the stored state by 90°. In this embodiment, an image is projected rearward from the upper side of the projection device main body 2 .

FIG. 9 shows a second usage pattern in which the projection apparatus main body 2 is placed horizontally and projected backward. This embodiment is realized by rotating the projection lens 3 clockwise by 90° around the first rotation axis θ1 from the stored state. In this embodiment, the image is projected rearward from the lower side of the projection device main body 2 .

FIG. 10 shows a first usage pattern in which the projection apparatus main body 2 is placed horizontally and the image is projected to the right side. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 by 90° and clockwise about the second rotation axis θ2 by 90° from the stored state. In this embodiment, an image is projected from the upper side of the projection device main body 2 toward the right side.

FIG. 11 shows a second usage pattern in which the projection apparatus main body 2 is placed horizontally and the image is projected to the right side. This embodiment is realized by rotating the projection lens 3 clockwise about the first rotation axis θ1 by 90 degrees and counterclockwise about the second rotation axis θ2 by 90 degrees from the stored state. In this embodiment, an image is projected from the lower side of the projection device main body 2 toward the right side.

FIG. 12 shows a first usage pattern in which the projection apparatus main body 2 is placed horizontally and the image is projected to the left side. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 by 90° and about the second rotation axis θ2 by 90° from the stored state. . In this embodiment, an image is projected from the upper side of the projection device main body 2 toward the left side.

FIG. 13 shows a second mode of use in which the projection device main body 2 is placed horizontally and the image is projected leftward. This embodiment is realized by rotating the projection lens 3 clockwise about the first rotation axis θ1 by 90° and clockwise about the second rotation axis θ2 by 90° from the stored state. In this embodiment, an image is projected from the lower side of the projection device main body 2 toward the left side.

FIG. 14 shows a first usage pattern in which the projection device main body 2 is placed horizontally and projected forward. In this embodiment, the projection lens 3 is rotated by 90° counterclockwise around the first rotation axis θ1 and 180° clockwise or counterclockwise around the second rotation axis θ2 from the stored state. Realized. In this embodiment, an image is projected forward from the upper side of the projection device main body 2 .

FIG. 15 shows a second usage pattern in which the projection device main body 2 is placed horizontally and projected forward. This embodiment is realized by rotating the projection lens 3 clockwise by 90° about the first rotation axis θ1 and rotating it clockwise or counterclockwise by 180° about the second rotation axis θ2 from the stored state. be done. In this embodiment, an image is projected forward from the lower side of the projection device main body 2 .

FIG. 16 shows a third mode of use in which the projection device main body 2 is placed horizontally to project forward. This embodiment is realized by rotating the projection lens 3 clockwise or counterclockwise by 180° around the second rotation axis θ2 from the stored state. In this embodiment, an image is projected forward from the housing front portion 14A of the projection device main body 2 .

FIG. 17 shows a usage pattern in which the projection apparatus main body 2 is placed horizontally and projected upward. This embodiment is realized by rotating the projection lens 3 counterclockwise about the second rotation axis θ2 from the stored state by 90°. In this embodiment, an image is projected upward from the housing upper surface portion 14E of the projection device main body 2 .

FIG. 18 shows a usage pattern in which the projection device main body 2 is placed horizontally and projected downward. This embodiment is realized by rotating the projection lens 3 clockwise by 90° around the second rotation axis θ2 from the stored state. In this embodiment, an image is projected downward from the housing bottom surface portion 14F of the projection device main body 2 .

19 to 30 are perspective views showing examples of use when the projection device main body is placed vertically. Note that "vertical placement" refers to the case where the largest surface of the housing 14 (in this embodiment, the housing bottom surface 14F or the housing top surface 14E) is substantially parallel to the direction of gravity.

In the case of vertical placement, the projection device main body 2 is installed with the housing back surface 14B facing downward. Moreover, it is installed with the housing right side surface 14D facing forward.

FIG. 19 shows a storage state when the projection device main body 2 is placed vertically. As shown in the figure, the projection lens 3 is housed in the recess 15 of the projection device main body 2 in the housed state.

FIG. 20 shows a first usage pattern in which the projection device main body 2 is placed vertically and projected downward. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 from the stored state by 90°. In this embodiment, an image is projected downward from the right side of the projection device main body 2 .

FIG. 21 shows a second usage pattern in which the projection apparatus main body 2 is placed vertically and projected downward. This embodiment is realized by rotating the projection lens 3 clockwise by 90° about the first rotation axis θ1 from the stored state. In this embodiment, an image is projected downward from the left side of the projection device main body 2 .

FIG. 22 shows a first usage pattern in which the projection apparatus main body 2 is placed vertically and projected forward. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 by 90° and clockwise about the second rotation axis θ2 by 90° from the stored state. In this embodiment, an image is projected forward from the right side of the projection device main body 2 .

FIG. 23 shows a second usage pattern in which the projection apparatus main body 2 is placed vertically and projected forward. This embodiment is realized by rotating the projection lens 3 clockwise about the first rotation axis θ1 by 90 degrees and counterclockwise about the second rotation axis θ2 by 90 degrees from the stored state. In this embodiment, an image is projected forward from the left side of the projection device main body 2 .

FIG. 24 shows a first usage pattern in which the projection device main body 2 is placed vertically and projected backward. This embodiment is realized by rotating the projection lens 3 counterclockwise about the first rotation axis θ1 by 90° and about the second rotation axis θ2 by 90° from the stored state. . In this embodiment, an image is projected rearward from the right side of the projection device main body 2 .

FIG. 25 shows a second mode of use in which the projection device main body 2 is placed vertically to project backward. This embodiment is realized by rotating the projection lens 3 clockwise about the first rotation axis θ1 by 90° and clockwise about the second rotation axis θ2 by 90° from the stored state. In this embodiment, an image is projected rearward from the left side of the projection device main body 2 .

FIG. 26 shows a first usage pattern in which the projection device main body 2 is placed vertically to project upward. In this embodiment, the projection lens 3 is rotated by 90° counterclockwise about the first rotation axis θ1 and 180° clockwise or counterclockwise about the second rotation axis θ2 from the stored state. Realized. In this embodiment, an image is projected upward from the right side of the projection device main body 2 .

FIG. 27 shows a second usage pattern in which the projection device main body 2 is placed vertically and projected upward. This embodiment is realized by rotating the projection lens 3 clockwise by 90° about the first rotation axis θ1 and rotating it clockwise or counterclockwise by 180° about the second rotation axis θ2 from the stored state. be done. In this embodiment, an image is projected upward from the left side of the projection device main body 2 .

FIG. 28 shows a third usage pattern in which the projection device main body 2 is placed vertically and projected upward. This embodiment is realized by rotating the projection lens 3 clockwise or counterclockwise by 180° around the second rotation axis θ2 from the stored state. In this embodiment, an image is projected upward from the housing front portion 14A of the projection device main body 2 directed upward.

FIG. 29 shows a usage pattern in which the projection device main body 2 is placed vertically and the image is projected to the right side. This embodiment is realized by rotating the projection lens 3 counterclockwise about the second rotation axis θ2 from the stored state by 90°. In this embodiment, an image is projected rightward from the housing upper surface portion 14E of the projection device main body 2 directed rightward.

FIG. 30 shows a usage pattern in which the projection apparatus main body 2 is placed vertically and the image is projected to the left side. This embodiment is realized by rotating the projection lens 3 clockwise by 90° around the second rotation axis θ2 from the stored state. In this embodiment, an image is projected leftward from the housing bottom portion 14F of the projection device main body 2 directed leftward.

[Internal structure of the main body of the projection device]
FIG. 31 is a plan view showing the schematic configuration inside the projection device main body.

As shown in the figure, the projection device main body 2 includes a light source section 20, an illumination section 21, an image display section 22, a main body orientation detection section 23, and a lens shift mechanism 80 therein.

The light source unit 20 includes a laser light source 20A, phosphor wheel 20B, mirror 20C, and color wheel 20D. A blue laser beam is emitted from the laser light source 20A. The light source unit 20 emits three colors of red, green, and blue light (or four colors of red, green, blue, and yellow) from a blue laser emitted from the laser light source 20A through a phosphor wheel 20B and a color wheel 20D. light) and emitted in a time division manner.

The illumination section 21 includes a rod integrator 21A, a lens 21B, a lens 21C, a lens 21D, a mirror 21E and a mirror 21F. Light emitted from the color wheel 20D of the light source unit 20 enters the rod integrator 21A. Rod integrator 21A homogenizes the light emitted from light source section 20 . The light emitted from the rod integrator 21A is relayed by the lens 21B, the lens 21C and the lens 21D, and enters the image display section 22 via the mirrors 21E and 21F.

The image display unit 22 receives the light emitted from the illumination unit 21 and generates 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 section 21 to the DMD 22B. The DMD 22B is an optical modulation element that time-divisionally modulates the light of each color component incident through the total reflection prism 22A. The DMD 22B has a large number of micromirrors whose reflection direction can be switched, and modulates incident light by changing the angle of each micromirror according to the video signal. The light modulated by the DMD 22B is transmitted through the total reflection prism 22A and guided to the projection lens 3.

The main body orientation detection unit 23 detects the orientation of the projection apparatus main body 2 (horizontal, vertical, etc.). The main body posture detection unit 23 is composed of, for example, an acceleration sensor that measures the tilt angle of the projection device main body 2 with respect to the direction of gravity. In addition, the main body orientation detection unit 23 may be a sensor that detects two positions of the projection apparatus main body 2, ie, the horizontal position and the vertical position.

The lens shift mechanism 80 moves the projection lens 3 with respect to the projection device main body 2 to shift the optical axis of the projection lens 3 . The lens shift mechanism 80 is arranged inside the inner wall surface 15</b>A on the front side of the recessed portion 15 of the projection apparatus main body 2 . Details of the lens shift mechanism 80 will be described later.

[Configuration of projection lens]
(Lens configuration of projection lens)
FIG. 32 is a diagram showing the lens configuration of the projection lens.

The projection lens 3 magnifies the image formed by the DMD 22B and projects it onto the projection target surface. The projection lens 3 is substantially composed of a first optical system G1, a second optical system G2 and a third optical system G3. The projection lens 3 has a zoom function and a focus function. The number of lenses that constitute each optical system may be one, or may be plural.

The first optical system G1 forms the image generated by the DMD 22B as an intermediate image. The first optical system G1 is located between the main body (housing) of the projection apparatus 1 and the second optical system G2 on the optical path. The first optical system G1 includes a first optical system first lens group G11, a first optical system second lens group G12, a first optical system third lens group G13, a first optical system fourth lens group G14, and a first mirror. substantially composed of R1; The first lens group G11 of the first optical system, the second lens group G12 of the first optical system, the third lens group G13 of the first optical system, and the fourth lens group G14 of the first optical system are perpendicular to the display surface of the DMD 22B. It is arranged along the first optical axis Z1. The first lens group G11 of the first optical system is a fixed lens group, and the second lens group G12 of the first optical system, the third lens group G13 of the first optical system, and the fourth lens group G14 of the first optical system are zoom lenses. This is the lens group that moves when The first optical system second lens group G12 and the first optical system third lens group G13 move together during zooming. Each lens group consists of at least one lens.

The first mirror R1 is arranged on the first optical axis Z1 and bends the optical path at right angles. The optical axis of the bent optical path is defined as a second optical axis Z2.

The second optical system G2 magnifies the intermediate image formed by the first optical system G1. Project onto a projection target surface (for example, screen, wall, ceiling, floor, etc.). The second optical system G2 is substantially composed of a second optical system first lens group G21, a second optical system second lens group G22, and a second mirror R2. The second optical system first lens group G21, the second optical system second lens group G22, and the second mirror R2 are arranged along the second optical axis Z2. The second mirror R2 perpendicularly bends the optical path of the second optical system G2. The optical axis of the bent optical path is defined as a 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.

The third optical system G3 projects the image magnified by the second optical system G2 onto the projection target plane. The third optical system G3 is substantially composed of a third optical system first lens group G31, a third optical system second lens group G32, and a 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 first lens group G31 of the third optical system and the third lens group G33 of the third optical system are fixed lens groups, and the second lens group G32 of the third optical system is a lens group that moves during focusing. Each lens group consists of at least one lens.

The projection lens 3 rotates the first mirror R1 and the second optical system G2 about the first optical axis Z1 as the first rotation axis θ1. In addition, the projection lens 3 has a second optical system G2, a second optical system second lens group G22, a second mirror R2, and a third optical system first lens group, with the second optical axis Z2 as the second rotation axis θ2. G31, the second lens group G32 of the third optical system, and the third lens group G33 of the third optical system rotate.

(Lens barrel of projection lens)
33 and 34 are perspective views showing the external structure of the lens barrel of the projection lens. Also, FIG. 35 is a cross-sectional view showing a schematic configuration of the inside of the lens barrel of the projection lens.

33, 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. As shown in FIG. The first holding portion 31 accommodates 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. be. The second holding portion 40 accommodates the first mirror R1 and the first lens group G21 of the second optical system. The third holding unit 50 includes a second optical system second lens group G22, a second mirror R2, a third optical system first lens group G31, a third optical system second lens group G32, and a third optical system third lens. Group G33 is accommodated. That is, the first to third holding portions 31, 40 and 50 hold various optical members.

35, 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. As shown in FIG.

In FIG. 34, the fixed frame 32 has a flange portion 32A on its outer circumference. The flange portion 32A functions as a connecting portion (mounting portion) to the projection device main body 2 . The projection lens 3 is mounted on the projection apparatus main body 2 via the flange portion 32A. At this time, the flange portion 32A of the projection lens 3 is connected to a lens shift mechanism 80 provided in the projection apparatus main body 2. As shown in FIG. The fixed frame 32 is provided with a rectilinear groove 32B along the first optical axis Z1. The rectilinear grooves 32B are provided at three locations in the circumferential direction at equal intervals.

The cam frame 33 is diametrically fitted to the inner peripheral portion of the fixed frame 32 and is rotatably held by the fixed frame 32 . The cam frame 33 is provided with a first cam groove 33A and a second cam groove 33B. The first cam grooves 33A and the second cam grooves 33B are provided at three locations in the circumferential direction at equal intervals.

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 portion of the fixed frame 32 and integrally fixed to the fixed frame 32 . As a result, the first lens group G11 of the first optical system is fixed and held at a fixed position.

The second lens holding frame 35 holds the first optical system second lens group G12 and the first optical system third lens group G13. The second lens holding frame 35 is radially fitted to the inner peripheral portion of the cam frame 33 and holds the inner peripheral portion of the cam frame 33 so as to be movable back and forth along the first optical axis Z1. The second lens holding frame 35 is provided with a first cam pin 35A on its outer periphery. The first cam pins 35A are provided at three locations in the circumferential direction at equal intervals. The first cam pin 35A is fitted into the first cam groove 33A provided in the cam frame 33 and the rectilinear groove 32B provided in the fixed frame 32 . Accordingly, when the cam frame 33 is rotated, the second lens holding frame 35 moves back and forth along the first optical axis Z1. As a result, the first optical system second lens group G12 and the first optical system third lens group G13 move back and forth together along the first optical axis Z1. This adjusts the angle of view (zoom magnification) of the projection image.

The third lens holding frame 36 holds the first optical system fourth lens group G14. The third lens holding frame 36 is radially fitted to the inner peripheral portion of the cam frame 33 and holds the inner peripheral portion of the cam frame 33 so as to be movable back and forth along the first optical axis Z1. The third lens holding frame 36 is provided with a second cam pin 35B on its outer periphery. The second cam pins 35B are provided at three positions in the circumferential direction at regular intervals. The second cam pin 35B is fitted into the second cam groove 33B provided in the cam frame 33 and the rectilinear groove 32B provided in the fixed frame 32 . Accordingly, when the cam frame 33 is rotated, the third lens holding frame 36 moves back and forth along the first optical axis Z1. As a result, the first optical system fourth lens group G14 moves back and forth along the first optical axis Z1.

The zoom gear frame 37 is diametrically fitted to the outer peripheral portion of the fixed frame 32 and is rotatably held by the fixed frame 32 . The zoom gear frame 37 has a gear portion 37A on its outer circumference. A zoom gear frame 37 is connected to the cam frame 33 . Accordingly, when the zoom gear frame 37 is rotated, the cam frame 33 is rotated.

A zoom drive gear 38A connected to a zoom motor 38 is meshed with the gear portion 37A of the zoom gear frame 37 . The zoom motor 38 is attached to the fixed frame 32 via a bracket 38B, as shown in FIG.

In FIG. 34, when the zoom motor 38 is driven, the zoom gear frame 37 rotates. As the zoom gear frame 37 rotates, the cam frame 33 rotates. As the cam frame 33 rotates, the second lens holding frame 35 and the third lens holding frame 36 move along the first optical axis Z1. As a result, the second lens group G12 of the first optical system, the third lens group G13 of the first optical system, and the fourth lens group G14 of the first optical system move along the first optical axis Z1, and the angle of view of the projected image ( zoom magnification) is adjusted.

The second holding section 40 includes a first rotating frame 41 , a first mirror holding frame 42 and a lens holding frame 43 . The second holding portion 40 is held by the first holding portion 31 so as to be rotatable about the first optical axis Z1 (=first rotation axis θ1). Although the first holding portion 31 is fixed to the housing 14 in this embodiment, the first holding portion 31 and the second holding portion 40 are connected, and the first holding portion 31 is also rotated with respect to the housing 14 . You can move it.

In FIG. 35, the first rotating frame 41 is diametrically fitted to the outer periphery of the fixed frame 32 of the first holding portion 31 and is rotatably held by the fixed frame 32 . A first support roller 32C as a rotating portion is provided on the outer peripheral portion of the fixed frame 32 . The first support rollers 32C are provided at three positions in the circumferential direction at regular intervals. The first rotating frame 41 is provided with a first guide groove 41A into which the first support roller 32C is fitted. The first guide groove 41A is arranged along the circumferential direction. The first rotating frame 41 is rotatably held with respect to the fixed frame 32 by moving the first support roller 32C along the first guide groove 41A.

The first mirror holding frame 42 holds the first mirror R1. The first mirror holding frame 42 has a structure bent at right angles, is connected to the first rotating frame 41 , and is integrally fixed to the first rotating frame 41 .

The lens holding frame 43 holds the second optical system first lens group G21. The lens holding frame 43 is connected to the first mirror holding frame 42 and integrally fixed to the first mirror holding frame 42 . A lens holding frame 43 fixed to the first mirror holding frame 42 is arranged perpendicular to the first rotating frame 41 .

The third holding section 50 includes a second rotating frame 51 , a second mirror holding frame 52 , a helicoid frame 53 , a final lens holding frame 54 , a focus lens holding frame 55 and a focus gear frame 56 . The third holding portion 50 is held by the second holding portion 40 so as to be rotatable about the second optical axis Z2 (=second rotation axis θ2).

The second rotating frame 51 holds the second lens group G22 of the second optical system. The second rotating frame 51 is diametrically fitted to the inner peripheral portion of the lens holding frame 43 of the second holding portion 40 and is rotatably held by the lens holding frame 43 . A second support roller 51A as a rotating portion is provided on the outer peripheral portion of the second rotating frame 51 . The second support rollers 51A are provided at three positions in the circumferential direction at regular intervals. The lens holding frame 43 is provided with a second guide groove 43A into which the second support roller 51A is fitted. The second guide grooves 43A are arranged along the circumferential direction. The second rotating frame 51 is rotatably held with respect to the lens holding frame 43 by moving the second support roller 51A along the second guide groove 43A.

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

The helicoid frame 53 is connected to the second mirror holding frame 52 and integrally fixed to the second mirror holding frame 52 . A helicoid frame 53 fixed to the second mirror holding frame 52 is arranged perpendicular to the second rotating frame 51 . The helicoid frame 53 has a female helicoid portion 53A on the inner periphery of its tip.

The final lens holding frame 54 holds the third lens group G33 of the third optical system, which is the final lens. The final lens holding frame 54 is connected to the tip of the helicoid frame 53 and fixed integrally with the helicoid frame 53 .

The focus lens holding frame 55 holds the third optical system second lens group G32. The focus lens holding frame 55 has a male helicoid portion 55A on the outer periphery of its tip. The male helicoid portion 55A of the focus lens holding frame 55 is screwed to the female helicoid portion 53A of the helicoid frame 53, and is arranged on the inner peripheral portion of the helicoid frame 53. As shown in FIG. By rotating, the focus lens holding frame 55 moves back and forth while rotating along the third optical axis Z3 due to the action of the male helicoid portion 55A and the female helicoid portion 53A. As a result, the third optical system second lens group G32 moves back and forth along the third optical axis Z3.

The focus gear frame 56 is diametrically fitted to the outer periphery of the helicoid frame 53 and is rotatably held by the helicoid frame 53 . The focus gear frame 56 has a gear portion 56A on its outer circumference. The focus gear frame 56 is connected to the focus lens holding frame 55 via a connecting pin 55B provided on the outer peripheral portion of the focus lens holding frame 55 . Accordingly, when the focus gear frame 56 is rotated, the focus lens holding frame 55 is rotated.

A focus drive gear 58A connected to a focus motor 58 is meshed with the gear portion 56A of the focus gear frame 56 . The focus motor 58 is attached to the second mirror holding frame 52 via a bracket 58B, as shown in FIG.

In FIG. 34, when the focus motor 58 is driven, the focus gear frame 56 rotates. As the focus gear frame 56 rotates, the focus lens holding frame 55 rotates. 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.

In the lens barrel 30 configured as above, the second holding portion 40 rotates around the first optical axis Z1 (=first rotation axis θ1) with respect to the first holding portion 31 . Also, the third holding portion 50 rotates about the second optical axis Z2 (=second rotation axis θ2) with respect to the second holding portion 40 .

(Projection lens locking mechanism)
As described above, the projection lens 3 is provided with the lock mechanism 60 that independently locks rotation about the first rotation axis θ1 and about the second rotation axis. The lock mechanism 60 includes a first lock mechanism 60A that locks rotation of the second holding portion 40 with respect to the first holding portion 31 and locks rotation of the projection lens 3 about the first rotation axis θ1. It also includes a second lock mechanism 60B that locks rotation of the third holding portion 50 with respect to the second holding portion 40 and locks rotation of the projection lens 3 about the second rotation axis θ2.

<First locking mechanism>
The first locking mechanism 60A locks the rotation of the second holding portion 40 at three positions. The three positions are the stowed position (see FIGS. 7 and 19), the position rotated 90° counterclockwise from the stowed state (see FIGS. 8 and 20), and the position rotated 90° clockwise from the stowed state. ° rotated position (see FIGS. 10 and 21).

FIG. 36 is an exploded perspective view showing a schematic configuration of the first locking mechanism.

As shown in the figure, the outer periphery of the fixed frame 32 of the first holding portion 31 is provided with a claw portion guide groove 32D along the circumferential direction. The claw portion guide groove 32D is provided with first lock groove portions 32E at three locations in the circumferential direction. Each of the first lock grooves 32E is composed of grooves extending along the first optical axis Z1 from the claw guide groove 32D, and is arranged at regular intervals (90° intervals).

The first lock pawl 61A is an integrally molded piece made of sheet metal. and a hook-shaped claw portion 64A provided at the tip of the first solenoid 68A and a connecting portion 65A to the plunger 68a of the first solenoid 68A. The first lock claw main body 62A is provided with two elongated holes 66A for attachment to the lens barrel 30. As shown in FIG.

As shown in FIGS. 33 and 34, the first lock claw 61A is slidably attached to the first mirror holding frame 42 of the second holding portion 40 via two screws 67A. A first lock claw 61A attached to the first mirror holding frame 42 is supported so as to be slidable along the first optical axis Z1. Further, the first lock claw 61A attached to the first mirror holding frame 42 has its claw portion 64A fitted into the claw portion guide groove 32D. By sliding the first lock claw 61A at the position of the claw portion guide groove 32D, the claw portion 64A is fitted into the claw portion guide groove 32D, and the second holding portion 40 is locked.

The first lock claw 61A is driven by the first solenoid 68A to slide. The first solenoid 68A is attached to the first mirror holding frame 42 of the second holding portion 40 via a bracket. The first solenoid 68A has a plunger 68a biased in the protruding direction. When the first solenoid 68A is energized (turned on), it retracts the plunger 68a against the biasing force.

The tip portion of the plunger 68a of the first solenoid 68A is connected to the connecting portion 65A of the first lock claw 61A. The first lock 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 is retracted against the biasing force. As a result, the first locking claw 61A slides. The sliding direction in this case is the direction in which the claw portion 64A retreats from the first lock groove portion 32E. When the first solenoid 68A is turned on, the claw portion 64A retreats from the first lock groove portion 32E and moves to the claw portion guide groove 32D. As a result, the rotation of the second holding portion 40 becomes possible.

On the other hand, by turning off the first solenoid 68A, the plunger 68a protrudes by the biasing force. As a result, the first locking claw 61A slides. The sliding direction in this case is the direction toward the first lock groove portion 32E. Therefore, when the first solenoid 68A is turned off at a position where the position of the claw portion 64A and the position of the first lock groove portion 32E match, the claw portion 64A is fitted into the first lock groove portion 32E, and the second holding portion 40 rotation is locked. That is, rotation about the first rotation axis θ1 is locked.

When the first solenoid 68A is turned off while the claw portion 64A is at a position other than the position of the first lock groove portion 32E, the claw portion 64A presses against the inner wall surface of the claw portion guide groove 32D due to the biasing force of the plunger 68a. touch. In this case, when the second holding portion 40 is rotated to a position where the position of the claw portion 64A and the position of the first lock groove portion 32E match, the claw portion 64A is pushed into the first lock groove portion 32E by the biasing force of the plunger 68a. It is fitted and the rotation of the second holding part 40 is locked. That is, rotation about the first rotation axis θ1 is locked.

In this manner, the first locking mechanism 60A moves the claw portion 64A of the first locking claw 61A forward and backward by turning on and off the first solenoid 68A, thereby locking and unlocking the rotation of the second holding portion 40. . That is, the rotation about the first rotation axis θ1 is locked or unlocked.

The ON/OFF of the first solenoid 68A is performed by the first unlock switch 11A. The first solenoid 68A is turned on for a certain period of time when the first lock release switch 11A is pushed once. Therefore, when the first unlock switch 11A is pushed once, the lock is released for a certain period of time.

<Second lock mechanism>
The second lock mechanism 60B locks the rotation of the third holding portion 50 at four positions. The four positions are at intervals of 90° with respect to the position in the housed state.

FIG. 37 is an exploded perspective view showing a schematic configuration of the second lock mechanism.

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

The second lock claw 61B is an integrally molded piece made of sheet metal. and a connecting portion 65B to the plunger 68b. The second lock claw main body 62B is provided with two long holes 66B for attachment to the lens barrel 30. As shown in FIG. As shown in FIGS. 33 and 34, the second lock claw 61B is slidably attached to the lens holding frame 43 of the second holding portion 40 via two screws 67B. Further, the second locking claw 61B attached to the lens holding frame 43 has its claw portion 64B fitted into the claw portion guide groove 51B. The detailed locking method and unlocking method of the rotating shaft are substantially the same as those of the first locking mechanism.

(Rotating position detector)
In FIG. 35, the projection lens 3 includes a first rotation position detection section 70A for detecting the rotation position of the second holding section 40 with respect to the first holding section 31, and a third holding section 50 with respect to the second holding section 40. A second rotation position detector 70B for detecting the rotation position of the is provided.

<First rotation position detector>
The first rotation position detection section 70A detects rotation positions of the second holding section 40 of 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, and 135° to 180°. , 180° 7 rotation positions (including the rotation range) are detected. Note that it is also possible to detect the rotation position in a finer range. For example, 45° and 135° may also be detected independently.

The first rotation position detection unit 70A is composed of a so-called optical absolute encoder, and includes a first optical scale 71A to which different codes are assigned according to the rotation position, and a first reading sensor 72A that reads the first optical scale 71A. And prepare.

The first optical scale 71A is arranged along the circumferential direction on the outer peripheral portion of the fixed frame 32 of the first holding portion 31 . FIG. 38 is a plan development view showing a schematic configuration of the first optical scale. The first optical scale 71A is assigned a code according to the rotational position by combining the reflective portion (white portion in FIG. 38) and the non-reflective portion (black portion in FIG. 38). In this example, 3-bit codes are assigned to the 3 tracks according to the rotational positions.

The first reading sensor 72A is provided on the first rotating frame 41 of the second holding section 40 and arranged to face the first optical scale 71A. The first reading sensor 72A has a structure in which a light source and an optical sensor are arranged in a line. to read. More specifically, it detects on/off of light and outputs a signal corresponding to the on/off. The output signal is a signal corresponding to the rotational position of the second holding portion 40 .

The second holding part 40 rotates within a range of 90 degrees counterclockwise and 90 degrees clockwise with respect to the stored state. In addition, the second holding portion 40 is positioned in the retracted state (see FIGS. 7 and 19), in a position 90° counterclockwise from the retracted state (see FIGS. 8 and 20), and clockwise from the retracted state. 90° (see FIGS. 9 and 21). The first rotation position detection unit 70A sets the position (see FIGS. 8 and 20) at which the second holding unit 40 is rotated 90° counterclockwise from the stored state as 0°, and rotates clockwise from the 0° position. The rotational position of the first holding portion 40 is detected with the rotational direction of movement as the positive rotational direction. Therefore, 90° is detected at the housed position (see FIGS. 7 and 19), and 180° is detected at the position rotated 90° clockwise from the housed state (see FIGS. 9 and 21).

<Second rotation position detector>
The second rotation position detection section 70B detects the rotation positions of the third holding section 50 at 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, and 135° to 180°. , 180°, 180° to 225°, 225° to 270°, 270°, 270° to 315°, and 315° to 360°. Note that it is also possible to detect the rotation position in a finer range. For example, 45°, 135°, 225° and 315° may also be detected independently.

The second rotation position detection unit 70B is composed of an optical absolute encoder similarly to the first rotation position detection unit 70A, and includes a second optical scale 71B to which a different code is assigned according to the rotation position, and a second optical scale 71B. and a second reading sensor 72B that reads the optical scale 71B. The details of the detection method are substantially the same as those of the first rotation position detection section 70A.

The first rotation position detection unit 70A and the second rotation position detection unit 70B are not limited to optical absolute encoders, and may use, for example, potentiometers that output rotation angles, movement amounts, etc. as voltage signals. can be done.

[Lens shift mechanism]
The projection device main body 2 is provided with a lens shift mechanism 80 . The lens shift mechanism 80 moves the projection lens 3 with respect to the projection device main body 2 to shift the optical axis of the projection lens 3 . More specifically, the optical axis of the projection lens 3 is shifted by moving the projection lens 3 within a plane perpendicular to the first optical axis Z1.

<Structure of Lens Shift Mechanism>
FIG. 40 is a front view showing a schematic configuration of the lens shift mechanism when the main body of the projection apparatus is placed horizontally. In the figure, the direction indicated by the arrow X is the left-right direction (synonymous with the horizontal direction and the horizontal direction) when the projection device main body 2 is placed horizontally, and the direction indicated by the arrow Y is the direction when the projection device main body 2 is placed horizontally. It is the vertical direction (synonymous with the vertical direction and the vertical direction) in the case.

The lens shift mechanism 80 includes a base plate 81, a first slide plate 82, a second slide plate 83 (see also FIG. 35), a first slide plate drive mechanism 84, and a second slide plate drive mechanism 85. Prepare.

The base plate 81 is fixed to the projection device main body 2 . A first slide plate 82 is attached to the base plate 81 , and a second slide plate 83 is attached to the first slide plate 82 . The second slide plate 83 is integrally provided with a mount portion 83M. The mount portion 83M is a portion for attaching the projection lens 3 . The projection lens 3 is attached to the lens shift mechanism 80 and connected to the projection apparatus main body 2 by screwing the flange portion 32A provided in the first holding portion 31 of the lens barrel 30 to the mount portion 83M. . The projection lens 3 connected to the projection device main body 2 is arranged such that its first optical axis Z1 is orthogonal to the housing front portion 14A of the projection device main body 2 .

FIG. 41 is a front view showing the support structure of the first slide plate with respect to the base plate.

As shown in the figure, the base plate 81 is provided with two parallel first slide rails 81C. The two first slide rails 81C are arranged parallel to the base plate 81 and inclined at 45° with respect to the horizontal direction. The first slide plate 82 is slidably held along the first slide rail 81C (hereinafter, the moving direction of the first slide plate 82, that is, the longitudinal direction of the first slide rail 81C is referred to as the first direction α. called).

FIG. 42 is a front view showing a structure for supporting the second slide plate with respect to the first slide plate.

As shown in the figure, the first slide plate 82 is provided with two parallel second slide rails 82C. The two second slide rails 82C are arranged parallel to the first slide plate 82 and perpendicular to the first direction α. The second slide plate 83 is slidably held along the second slide rail 82C (hereinafter, the moving direction of the second slide plate 83, that is, the longitudinal direction of the second slide rail 82C is referred to as the second direction β). called).

As shown in FIGS. 40, 41 and 42, the base plate 81, the first slide plate 82 and the second slide 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 paths of the projected image light. The base opening 81A, the first opening 82A, and the second opening 83A are arranged so as not to block the optical path of the image light even if the lens barrel 30 moves with the sliding of the first slide plate 82 and the second slide plate 83, respectively. , position, size and shape are determined.

Further, the first slide plate 82 is provided with a first groove portion 82B connected to the first slide plate drive mechanism 84, and the second slide plate 83 is provided with a second groove portion 82B connected to the second slide plate drive mechanism 85. A groove portion 83B is provided.

FIG. 43 is a front view showing a schematic configuration of the first slide plate drive mechanism.

As shown in the figure, the first slide plate driving mechanism 84 includes a first shift motor 86 , a first rotating shaft 87 and a first moving piece 88 . Each part of the first slide plate drive mechanism 84 is attached to the base plate 81 .

The first shift motor 86 is, for example, a stepping motor. The first shift motor 86 has a first drive shaft 86A. The first drive shaft 86A is arranged perpendicular to the first direction α.

The first rotation shaft 87 is arranged perpendicular to the first drive shaft 86A of the first shift motor 86 and parallel to the first direction α. The first rotating shaft 87 is provided with a first threaded portion 87A formed of a male screw.

The first rotating shaft 87 and the first drive shaft 86A are connected by a first worm gear 89 so as to be capable of transmitting rotation. The first worm gear 89 is composed of a first worm 89A provided on the first drive shaft 86A and a first worm wheel 89B provided on the first rotary shaft 87. As shown in FIG. When the first shift motor 86 rotates, the rotation of the first drive shaft 86A is transmitted to the first rotation shaft 87 via the first worm gear 89, and the first rotation shaft 87 rotates.

The first moving piece 88 includes a first moving piece main body 88A and a first connecting portion 88B. The first moving piece main body 88A has a cylindrical shape and has a female threaded portion on its inner periphery. The first moving piece 88 is attached to the first rotating shaft 87 by screwing the female threaded portion into the first threaded portion 87A of the first rotating shaft 87 . In the first moving piece 88 attached to the first rotating shaft 87, the first moving piece main body 88A slides on the first slide plate 82, and the rotation is restricted. The first connecting portion 88B is provided as a protruding portion that can be fitted into the first groove portion 82B provided in the first slide plate 82 so as to protrude from the first moving piece main body 88A. The first moving piece 88 is connected to the first slide plate 82 by fitting the first connecting portion 88B into the first groove portion 82B.

When the first slide plate driving mechanism 84 having the above configuration drives the first shift motor 86 to rotate the first rotating shaft 87 , the first moving piece 88 moves along the first rotating shaft 87 . to move. As the first moving piece 88 moves along the first rotating shaft 87, the first slide plate 82 slides along the first direction α. When the first shift motor 86 is rotated forward, the first slide plate 82 slides in the positive direction of the first direction α (upper right direction in FIG. 41). It slides in the - direction (lower left direction in FIG. 41) in one direction α.

FIG. 44 is a front view showing a schematic configuration of the second slide plate drive mechanism.

As shown in the figure, the second slide plate driving mechanism 85 includes a second shift motor 90, a second rotating shaft 91, a second moving piece 92, a base plate 81, a second shift motor 90, a second It has a drive shaft 90A, a second rotating shaft 91, a second threaded portion 91A, a second worm gear 93, a second worm 93A, and a second worm wheel 93B. The mechanism of the second slide plate drive mechanism 85 is substantially the same as the mechanism of the first slide plate drive mechanism 84 . Further, the details of each member of the second slide plate driving mechanism 85 are substantially the same as those of the corresponding members of the first slide plate driving mechanism 84 .

<Shift operation of lens shift mechanism>
The lens shift mechanism 80 configured as described above shifts the projection lens 3 in 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. FIG.

For example, when shifting the projection lens 3 upward, the first shift motor 86 and the second shift motor 90 are rotated forward by the same amount. As a result, the first slide plate 82 slides in the + direction of the first direction α (upper right direction in FIG. 40), and the second slide plate 83 slides in the + direction of the second direction β (upper left direction in FIG. 40). Lens 3 shifts upward.

Further, for example, when the projection lens 3 is to be shifted downward, the first shift motor 86 and the second shift motor 90 are reversely rotated by the same amount. As a result, the first slide plate 82 slides in the − direction of the first direction α (lower right direction in FIG. 40), and the second slide plate 83 slides in the − direction of the second direction β (lower left direction in FIG. 40), The projection lens 3 shifts downward.

Further, for example, when the projection lens 3 is to be shifted rightward, the first shift motor 86 is rotated forward and the second shift motor 90 is rotated backward by the same amount. As a result, the first slide plate 82 slides in the + direction of the first direction α (upper right direction in FIG. 40), and the second slide plate 83 slides in the − direction of the second direction β (lower left direction in FIG. 40). By sliding by the same amount, the projection lens 3 shifts to the right.

Further, for example, when the projection lens 3 is to be shifted leftward, the first shift motor 86 is reversely rotated and the second shift motor 90 is forwardly rotated by the same amount. As a result, the first slide plate 82 slides in the negative direction of the first direction α (lower right direction in FIG. 40), and the second slide plate 83 slides in the + direction of the second direction β (upper left direction in FIG. 40). , the projection lens 3 is shifted leftward.

[Electrical Internal Configuration of Projection Device]
FIG. 45 is a block diagram showing an embodiment of the electrical internal configuration of the projection device.

As shown in FIG. 45, the projection lens 3 of the projection device 1 includes a focus drive section 110, a zoom drive section 120, a lock mechanism 60, an unlock operation section 11, a display section 150, a first rotation position detection section 70A, and a second rotation position detector 70B. Each optical system and holding portion of the projection lens 3 are omitted.

The projection device main body 2 of the projection device 1 includes a CPU (Central Processing Unit) 210, a main body orientation detection section 23, a storage section 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, a power supply control unit 280, and the like are provided.

The focus drive unit 110 includes a focus motor 58 and its drive circuit, and drives the focus motor 58 based on a focus command from the CPU 210 (see FIG. 33). Then, in FIG. 35, the focus driving section 110 moves the third optical system second lens group G32 along the third optical axis Z3. As a result, the focus of the projection image projected from the projection lens 3 onto the projection target surface (screen or the like) is adjusted.

The zoom drive unit 120 includes the zoom motor 38 and its drive circuit, and drives the zoom motor 38 based on a zoom command from the CPU 210 (see FIG. 33). 35, 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. move. As a result, the angle of view (zoom magnification) of the projection image projected from the projection lens 3 onto the projection target plane is adjusted.

As described above, the lock mechanism 60 has the first lock mechanism 60A that locks the rotation of the second holding portion 40 and locks the rotation of the projection lens 3 about the first rotation axis θ1. The lock mechanism 60 also has a second lock mechanism 60B that locks the rotation of the third holding portion 50 and locks the rotation of the projection lens about the second rotation axis θ2. The first lock mechanism 60A drives the first solenoid 68A based on an unlock command (first unlock 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 lock mechanism 60B drives the second solenoid 68B based on an unlock command (second unlock signal) from the CPU 210 . Then, the claw portion 64B of the second lock claw 61B is retracted from the second lock groove portion 51C by the second solenoid 68B, and the lock of the third holding portion 50 is released.

The unlocking operation portion 11 includes a first unlocking switch 11A for unlocking the second holding portion 40 by the first locking mechanism 60A and a second lock for unlocking the third holding portion 50 by the second locking mechanism 60B. and a release switch 11B.

In FIG. 1, when the first unlocking switch 11A is turned on (one push), the first unlocking command signal is output to the CPU 210 from the first unlocking switch 11A. When the CPU 210 inputs the first unlock command signal from the first unlock switch 11A, the CPU 210 outputs the first unlock signal for unlocking the first lock mechanism 60A for a certain period of time (for example, 10 seconds). output to When the first unlocking signal is input, the first locking mechanism 60A drives the first solenoid 68A and unlocks the second holding portion 40 .

Similarly, when the second unlock switch 11B is turned on, the second unlock command signal is output to the CPU 210 from the second unlock switch 11B. When the second unlocking command signal is input from the second unlocking switch 11B, the CPU 210 outputs the second unlocking signal for unlocking the second locking mechanism 60B for a certain period of time (for example, 10 seconds). output to When the second unlocking signal is input, the second locking mechanism 60B drives the second solenoid 68B to unlock the third holding portion 50. As shown in FIG.

The display unit 150 is an LED (Light Emitting Diode) provided on the key top of the unlock operation unit 11 (the first unlock switch 11A and the second unlock switch 11B), and is capable of emitting white light and red light. It is. The CPU 210 outputs a display control signal for lighting and blinking white light and lighting and blinking red light to the display unit 150, and locks and unlocks the second holding unit 40 and the third holding unit 50 of the projection lens 3. and notify warnings, etc. Details of the display control of the display unit 150 will be described later.

The first rotation position detection section 70A detects the rotation position of the second holding section 40 . As described above, the first rotation position detection section 70A detects the rotation positions of the second holding section 40 at 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, Seven rotation positions (including the rotation range) from 135° to 180° and 180° are detected. The second holding portion 40 can be rotated within a range of 0° to 180°, and as described above, is locked at three positions of 0°, 90°, and 180° (the rotation of the second holding portion 40 is specific state). The rotation position of the second holding portion 40 shown in FIG. 1 is 90°, and in FIG. is the angle of

The second rotation position detection section 70B detects the rotation position of the third holding section 50 . As described above, the second rotation position detection section 70B detects the rotation positions of the third holding section 50 at 0°, 0° to 45°, 45° to 90°, 90°, 90° to 135°, Detects 12 rotation positions (including rotation range): 135°-180°, 180°180°-225°, 225°-270°, 270°, 270°-315°, 315°-360° . The third holding portion 50 can rotate endlessly, and as described above, is locked at four positions of 0° (=360°), 90°, 180°, and 270° (the third holding portion 50 is locked). The rotating state becomes the specific state). The rotation position of the third holding portion 50 shown in FIG. 1 is 0°. angle.

Combining the three specific states in which the second holding section 40 is locked and the four specific states in which the third holding section 50 is locked, the projection lens can be obtained as shown in FIGS. 3 can take 12 locking states (specific states) with respect to the projection device main body 2 . In particular, the locked state (specific state) in which the second holding portion 40 is rotated at 90 degrees and the third holding portion 50 is rotated at 0 degrees, as shown in FIG. It is in a storage state in which it is stored in the recessed portion 15 of the device main body 2 .

FIGS. 7 to 18 are perspective views showing the projection apparatus 1 in which the projection lens 3 is locked in 12 different states, and particularly show the case where the projection apparatus main body 2 is placed horizontally. , the case where the projection device main body 2 is placed vertically.

Note that the projection lens 3 can take any posture with respect to the projection device 1 depending on the rotational positions of the second holding portion 40 and the third holding portion 50 . On the other hand, there are 12 "specific orientations" of the projection lens 3 corresponding to 12 lock states.

Returning to 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 third holding signal A second rotation position signal indicating the rotation position of the unit 50 is output to the CPU 210 .

A body operation unit 6 provided in the projection device 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.

The MENU key 6B is an operation key for issuing a command to display a menu on a projection screen projected on the screen. The cross key 6C is an operation key for inputting instructions in four directions, up, down, left, and right, and serves as a button (cursor movement operation means) for selecting items from a menu screen and instructing selection of various setting items from each menu. Function. The cross key 6C also functions as a multi-function key for inputting various instructions according to the content of the selected menu.

The main body orientation detection unit 23 is a sensor that detects the orientation (horizontal, vertical, etc.) of the projection device main body 2, and may be configured by, for example, an acceleration sensor that measures the tilt angle of the projection device main body 2 with respect to the direction of gravity. can. The main body posture detection unit 23 outputs an angle signal indicating the tilt angle of the projection apparatus main body 2 obtained by measurement to the CPU 210 . It should be noted that the main body orientation detection unit 23 may be a sensor that detects two positions of the projection apparatus main body 2, ie, the horizontal position and the vertical position.

In FIG. 45, the storage unit 240 includes ROM (Read Only Memory), RAM (Random Access Memory), flash ROM, and the like. Based on the control program stored in the ROM of the storage unit 240 and the tables and parameters stored in the ROM or flash ROM, the CPU 210 performs integrated control of each unit of the projection apparatus 1 using the RAM as a work area.

In FIG. 31, light of the three primary colors of red, green, and blue (or red, green, blue, and yellow) enters the DMD 22B constituting the image display section 22 in a time-division manner via the color wheel 24 of the light source section 20. do. Then, the DMD 22B emits an image by performing optical modulation with a video signal corresponding to each color that is switched in a time division manner from the display control unit 254 . By switching the images of each color at high speed, the afterimage phenomenon is recognized as a color image by the human eye. Although the DMD 22B is mentioned as an electro-optical element, it is not limited to this, and an LED panel, an organic light-emitting panel, or a liquid crystal panel may be used. In that case, a dichroic prism may be used instead of the total reflection prism 22A.

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

The OSD image output unit 252 has an internal memory for storing text information, graphic information, icon images, etc. to be displayed as an OSD image. 2 images) to the display control unit 254 .

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

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 , An angle signal is received that indicates the angle of inclination. Based on these input signals, the direction in which the projected image is to be moved (in this example, one of the four directions of up, down, left, and right) is determined. Thereafter, a movement command is output to the lens shift mechanism 80 (see FIG. 40) to move the projection image in the determined direction.

Here, the direction in which the projection image is moved is determined, for example, in a direction that reduces interference (“vignetting” of the projection image) between the projection image and the projection device main body 2 itself or a table or the like on which the projection device main body 2 is installed. Further, the moving direction of the projection lens 3 and the moving direction of the projected image do not correspond one-to-one, but change according to the rotational positions of the second holding portion 40 and the third holding portion 50 . Therefore, it is necessary to determine the direction in which the projection lens 3 is moved, taking into consideration the rotational positions of the second holding portion 40 and the third holding portion 50 and whether the projection device main body 2 is placed horizontally or vertically. . Details of the control of the lens shift mechanism 80 will be described later.

In this example, the light source unit 20 has a laser light source 20A that emits laser light. good. If three light emitting diodes are used, the color wheel 24 can be omitted.

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 , the inclination of the projection apparatus main body 2 , and the like. An angle signal indicating the angle and mode information indicating the projection mode (first mode, second mode) selected by the main body operation unit 6 are received. Based on these input signals, the light source control section 270 determines whether the laser light source 20A of the light source section 20 emits light or not, and controls the light emission or non-light emission of the laser light source 20A. Details of the control of the light source control unit 270 will be described later.

Power (commercial power) is supplied from the power connector 9 to the power control unit 280 . When the power switch 6A is turned on, the power control unit 280 controls the CPU 210, the projection lens 3, various motors in the lens shift mechanism 80, the solenoid of the lock mechanism 60 (see FIG. 36), and the power supplied from the power connector 9. Various voltages to be supplied to the laser light source 20</b>A of the light source unit 20 are generated, and power is supplied to each unit of the projection device main body 2 .

When the power switch 6A is turned off, the power control unit 280 stops supplying power to each part of the projection apparatus main body 2 (turns off the power). Equipped with an auto power off function that automatically turns off the power in the case of The details of the control of the power control unit 280 will be described later.

(Structure related to rotation of projection lens)
An overview of the configuration regarding rotation of the projection lens 3 will be described. As described above with reference to FIGS. 32-35, the projection lens 3 comprises a first holding portion 31, a second holding portion 40 and a third holding portion . The first holding section 31 is connected to the projection device main body 2 (casing), passes light along the first optical axis Z1 (first optical axis), and holds the first optical system G1 (optical system). The second holding unit 40 passes the light of the second optical axis Z2 (second optical axis), which is the bent light of the first optical axis Z1, and holds the second optical system G2 (optical system). The third holding unit 50 passes the light of the third optical axis Z3 (third optical axis), which is the bent light of the second optical axis Z2, and holds the third optical system G3. The second holding portion 40 rotates with respect to the first holding portion 31 , and the third holding portion 50 rotates with respect to the second holding portion 40 .

The projection lens 3 also includes a first rotation position detection section 70A (first detection section) that detects the rotation state of the second holding section 40, and a second rotation position detection section 70A that detects the rotation state of the third holding section 50. and a moving position detection section 70B (second detection section), and the first rotation position detection section 70A and the second rotation position detection section 70B constitute the detection section. Further, the projection lens 3 includes a first locking mechanism 60A that locks or unlocks the rotation of the second holding portion 40, and a second lock mechanism 60A that locks or unlocks the rotation of the third holding portion 50. and a lock mechanism 60B. The first locking mechanism 60A and the second locking mechanism 60B constitute a locking mechanism 60 (locking mechanism section). The details of the configuration for these pivots are as described above with respect to Figures 32-35.

(Locking of holding part and control of power supply and light source related to locking)
Locking and unlocking of the rotation of the holding portion and control of the power source and light source related thereto will be described. 46 and 47 are flowcharts showing control procedures for locking and unlocking, turning on the power, and turning on the light source. 46 and 47, the case where the process is started from a state in which the projection lens 3 (projection lens) is housed and the power source and the light source are turned off will be described. The "stored state" means that the projection lens 3 is housed in the concave portion 15a provided in the inner wall surface 15A of the concave portion 15 of the projection device main body 2 (housing), and the third optical system which is the final lens group of the projection lens 3. The third lens group G33 is housed facing the concave portion 15a (housing) (first position) (see FIGS. 1 to 7). In this storage state, the lens cover front portion 18A (side surface), the lens cover right side surface portion 18D (side surface), the lens cover top surface portion 18E (side surface), and the lens cover bottom surface portion 18F (side surface) of the lens cover 18 (cover member) are Approximately the same plane as the housing front portion 14A (side surface), the housing right side surface portion 14D (side surface), the housing top surface portion 14E (side surface), and the housing bottom surface portion 14F (side surface) of the projection device main body 2 (housing 14), respectively. exist above. These parts form a flat rectangular parallelepiped shape (rectangular parallelepiped) together with the projection apparatus main body 2 (housing 14) (see FIGS. 1 to 7).

When the process starts, the power control unit 280 determines whether or not a power-on operation (an operation to turn on the power switch 6A) has been performed (step S100). If the determination in step S100 is affirmative, the process proceeds to step S102, and the lock mechanism 60 (lock mechanism portion) determines whether or not the second holding portion 40 and the third holding portion 50 are in the locked state. If the second holding unit 40 and the third holding unit 50 are in the locked state (YES in step S102), the power control unit 280 turns on the power (step S104), and if they are not in the locked state (NO in step S102). returns to step S102 without turning on the power (step S106).

When the power is turned on in step S104, the lock mechanism 60 operates by turning on the LEDs (display section 150; lamp ) is flashed with, for example, white light (step S108). Thereby, the user can easily grasp that the unlock switch should be operated. In other words, the lock mechanism 60 maintains the locked state of rotation of each holding portion even when the power of the projection device 1 is turned on.

When the first unlocking switch 11A is input (operated) (YES in step S110), the second locking mechanism 60B (second locking mechanism portion) disables unlocking of the third holding portion 50 (step S112), The first locking mechanism 60A (first locking mechanism section) unlocks the second holding section 40 (the unlocked state is maintained for a certain period of time; step S114). When the lock is released, the LED of the first unlock switch 11A stops blinking and continues lighting with white light. On the other hand, the second unlock switch 11B of the third holding portion 50 in the locked state is turned off. Thereby, the user can easily grasp that the second holding portion 40 is in the unlocked state. Further, since the second holding portion 40 is in the unlocked state for a certain period of time, the user can rotate the second holding portion 40 during this period. Note that the lock mechanism 60 does not unlock both the second holding portion 40 and the third holding portion 50 at the same time (if one is unlocked, the other is locked). Therefore, it is possible to prevent the two shafts from rotating simultaneously and unintended rotation from occurring.

The first rotation position detection section 70A and the second rotation position detection section 70B detect the rotation states of the second holding section 40 and the third holding section 50, respectively, and the projection lens 3 is in the retracted state (first position). It is determined whether or not there is (step S116). When the projection lens 3 is not rotated and remains in the retracted 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 issues a warning to the user. (Step S126). The warning in step S126 is given by, for example, the lock mechanism 60 (the first lock mechanism 60A, the second lock mechanism 60B) blinking the LEDs of the first unlock switch 11A and the second unlock switch 11B with white light. can be done. On the other hand, in the warning in step S126, the projection device 1 may cause the display unit 150 to generate a warning sound such as a beep sound using a device such as an electronic circuit (not shown) instead of or in addition to the blinking. This warning state continues while the determination in step S116 is YES (while the projection lens 3 is in the retracted state).

If the rotational state of the projection lens 3 is displaced to a state other than the housed state (the projection lens 3 can be displaced between the first position, which is the housed state, and the second position other than the first position), the determination in step S116 is denied. Further, when the second holding portion 40 is locked in a specific state (described later), the determination in step S118 is affirmative. In this state, the lock mechanism 60 enables unlocking of the third holding section 50 (step S120), and the light source control section 270 turns on the laser light source 20A (light source) (step S122). On the other hand, if the second holding portion 40 is not locked (for example, if the rotating state is not in a specific state that allows locking; NO in step S118), the light source control portion 270 turns on the laser light source 20A. (Step S128), for example, the warning is notified by flashing red light of the LED or beep sound (Step S130), and the process returns to Step S118. Note that "can be unlocked" means a state in which the lock is released when the user inputs (operates) the lock release switch (the first unlock switch 11A or the second unlock switch 11B). “Cannot be unlocked” is a state in which the lock cannot be unlocked even if the unlock switch is pressed.

In FIG. 47, when the first unlock switch 11A is not input (operated) in step S110 and the second unlock switch 11B is input (YES in step S132), the first lock mechanism 60A is in the second holding state. The lock of the portion 40 cannot be unlocked (step S134), and the second locking mechanism 60B unlocks the third holding portion 50 (unlocked state; step S136). When the lock is released, the LED stops blinking, and the second unlock switch 11B of the unlocked third holding unit 50 continues lighting with white light, for example. On the other hand, the first unlock switch 11A of the second holding portion 40 in the locked state is turned off. Thereby, the user can easily grasp that the third holding portion 50 is in the unlocked state. Since the third holding portion 50 is in the unlocked state for a certain period of time, the user can rotate the third holding portion 50 during this period. If the second unlock switch 11B is also not pressed (NO in step S132), the process returns to step S108.

After unlocking the third holding portion 50, the first rotation position detection portion 70A (detection portion) and the second rotation position detection portion 70B (detection portion) detect the rotation of the second holding portion 40 and the third holding portion 50, respectively. A moving state is detected to determine whether or not the projection lens 3 is in the retracted state (step S138). If the determination is affirmative (in the retracted state), the light source control unit 270 does not turn on the laser light source 20A (light source) (step S146), and warns the user, for example, by blinking the LED with white light or beeping. After notification (step S148), the process returns to step S138. If the determination in step S138 is negative (not in the housed state), the third holding unit 50 enters a specific state (described later) and is locked (YES in step S140). The lock mechanism 60 allows the locking of the second holding section 40 to be released for a certain period of time (step S142), and the light source control section 270 turns on the laser light source 20A (step S144). On the other hand, if the third holding unit 50 is not locked (for example, if the rotating state is not a specific lockable state; NO in step S140), the light source control unit 270 does not turn on the laser light source 20A (step S150). ), for example, the warning is notified by flashing red light of the LED or beep sound (step S152), and the process returns to step S140.

<Effect of lock-related control>
As described above, since the power is not turned on while the projection lens 3 is rotatable, each holder cannot be rotated without the user's unlocking instruction. Therefore, it is possible to prevent the unintentional rotation of the projection lens 3 and appropriately limit the rotation state of the projection lens 3 . That is, it is possible to appropriately control the rotation of the projection lens. In addition, as described in S218 of FIG. 51, the power of the projection device cannot be turned off when the holding unit is in a state other than the specific state. Therefore, when the power is turned on, the rotation of the projection lens 3 can be locked.

Further, when the light source is turned on while the projection lens 3 is in the retracted state (first position), the emitted light hits the concave portion 15a of the projection device main body 2, causing the temperature to rise and adversely affect the operation of the projection device 1. However, such adverse effects can be prevented by controlling as described above. Further, the input of the first lock release switch 11A and the second lock release switch 11B means that the user is preparing to use the projection apparatus 1, such as changing the rotational state and setting the projection direction. , the light source is turned on according to the input of these lock release switches.

(lock in specific state)
The second holding portion 40 and the third holding portion 50 are locked when the rotating state reaches a specific state. In other words, the second holding portion 40 and the third holding portion 50 are unlocked in states other than the specific state. A description will be given of such lock control. FIG. 48 is a flow chart showing processing relating to locking of the holding unit. The main body posture detection unit 23 (third detection unit) detects the direction of the projection device 1 with respect to gravity (posture: horizontal, vertical, or otherwise) (step S160). The first rotation position detection section 70A and the second rotation position detection section 70B detect the rotation states of the second holding section 40 and the third holding section 50, respectively (step S162). 7 to 18 and FIGS. 19 to 30 respectively show the state in which the projection device 1 is placed horizontally and the state in which it is placed vertically. The lock mechanism 60 (first lock mechanism 60A; lock mechanism portion) determines whether or not the second holding portion 40 is in the unlocked state (step S164). If it is in the unlocked state (YES in step S164), it is determined that unlocking of the third holding unit 50 is prohibited (the lock is not unlocked even if the second unlocking switch 11B is pressed) (step S166).

The lock mechanism 60 and the first lock mechanism 60A (lock mechanism portion) determine whether the second holding portion 40 is in the specific state based on the rotation state of the second holding portion 40 detected in step S162. (Step S168). “The second holding portion 40 is in the specific state” means that the rotational position of the second holding portion 40 is 0°, 90°, or 180°. When the second holding portion 40 is in this "specific state" (YES in step S168), the first locking mechanism 60A can lock the second holding portion 40 as described above with reference to FIG. 36 (step S170). Then, the second lock mechanism 60B enables unlocking of the third holding portion 50 (a state in which unlocking is possible by inputting the second unlock switch 11B). If the second holding portion 40 is not in the “specific state” (NO in step S168), the first locking mechanism 60A cannot lock the second holding portion 40. FIG. In addition to "the second holding part 40 is in a specific state", even if the second holding part 40 is locked when the orientation of the projection device 1 with respect to gravity is in a specific state (vertical or horizontal), good.

On the other hand, if the determination in step S164 is NO. (when the second holding portion 40 is not in the unlocked state, that is, in the locked state), the lock mechanism 60 (second lock mechanism 60B; lock mechanism portion) determines whether the third holding portion 50 is in the unlocked state. is determined (step S174). Judgment is NO. In this case, since both the second holding section 40 and the third holding section 50 are in the locked state, a warning is issued (step S184). The content of the warning is to prompt the input of the first unlocking switch 11A or the second unlocking switch 11B, as described in step S102 of FIG.

When the third holding portion 50 is in the unlocked state (YES in step S174), the first locking mechanism 60A (locking mechanism portion) disables unlocking of the second holding portion 40 (step S176). The lock mechanism 60 and the second lock mechanism 60B (lock mechanism portion) determine whether or not the third holding portion 50 is in the specific state based on the rotation state of the third holding portion 50 detected in step S162. (Step S178). “The third holding portion 50 is in a specific state” means that the rotational position of the third holding portion 50 is 0°, 90°, 180°, or 270°. When the third holding portion 50 is in the "specific state" (YES in step S178), the second locking mechanism 60B locks the third holding portion 50 (step S180). Then, the first locking mechanism 60A enables unlocking of the second holding portion 40 (the unlockable state by inputting the first unlocking switch 11A). The second locking mechanism 60B does not lock the third holding portion 50 when the third holding portion 50 is not in the specific state. In addition to "the third holding section 50 is in a specific state," the third holding section 50 is locked when the direction of the projection device 1 with respect to gravity is in a specific state (vertical or horizontal). good too.

<Effect of locking in a specific state>
As described above, the second holding portion 40 and the third holding portion 50 are each locked when they are in the specific state, and these holding portions are not unlocked at the same time (one is in the unlocked state). In this case, the other is locked), so that it is possible to appropriately limit the rotation state and prevent adverse effects due to unexpected rotation or the like. That is, it is possible to appropriately control the rotation of the projection lens. In addition to "the second holding part 40 and the third holding part 50 are in a specific state", when the direction of gravity of the projection device 1 is in a specific state (vertical or horizontal), the second holding unit The portion 50 and/or the third holding portion 50 may be locked.

(Restrictions on Unlocking in Unsafe Conditions)
Restrictions on unlocking in unsafe conditions are described. FIG. 49 is a flow chart of processing for restricting unlocking. The lock mechanism 60 determines whether or not an unlocking operation (input of the first unlocking switch 11A and the second unlocking switch 11B) has been performed (step S190). The main body orientation detection unit 23 (third detection unit) detects the orientation (installation state) of the projection apparatus 1 with respect to gravity (step S192), and determines whether the projection apparatus 1 is placed horizontally or vertically (step S194). 7 to 18 and FIGS. 19 to 30 respectively show the state in which the projection device 1 is placed horizontally and the state in which it is placed vertically.

In the case of vertical placement (NO in step S164), there is no unlockable state, so the process ends. In the case of horizontal placement (YES in step S194), the first rotation position detection section 70A and the second rotation position detection section 70B detect the rotation states of the second holding section 40 and the third holding section 50, respectively (step S194). S196). Then, the lock mechanism 60 (first lock mechanism 60A, second lock mechanism 60B: lock mechanism portion) determines whether or not the second holding portion 40 and the third holding portion 50 are in an unsafe state (step S198). The "unsafe state" in step S198 is, for example, a state in which the rotational position of the second holding portion 40 is 0° and the rotational position of the third holding portion 50 is 90° (see FIG. 10). If this determination is affirmative, the lock mechanism 60 disables unlocking of the second holding portion 40 (step S200). By making it impossible to unlock the second holding part 40 in this state, the second holding part 40 rotates and the third lens group G33 (exiting optical system) of the third optical system, which is the final lens, is placed on the installation surface or the like. can be prevented from colliding with It should be noted that "the second holding portion 40 cannot be released" is a state in which the lock is not released even if the first unlock switch 11A is pressed.

When the lock of the second holding unit 40 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 unlocking method (step S202). Specifically, for example, an OSD image can be used for notification. FIG. 50 is a diagram showing an example of notification by an OSD image. Part (a) of the figure shows the reason why the cancellation is not possible due to the OSD image 99A synthesized with the projected image 98 ("You cannot rotate the lens on axis 1 at this position. ”) is displayed. Part (b) of the figure shows an example of how to release the OSD image 99B. The lock of the second holding part 40 can be released). Note that both the reason why the cancellation is impossible and the cancellation method may be displayed. With such a display, the user can easily grasp the reason why the lock cannot be released or the unlocking method. It should be noted that the locking of the second holding portion 40 is not performed in an “unsafe state” other than the state described above (the rotational position of the second holding portion 40 is 0° and the rotational position of the third holding portion 50 is 90°). Control can be performed in the same way when unlocking is prohibited, and when unlocking of the third holding portion 50 is prohibited in another “unsafe state”.

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 (the rotation state of the projection lens, and the power supply and light source related to the rotation state) , and control of the locked state of the holding portion).

(Shape, etc. of Projection Device in Stored State)
In the stored state, the projection device 1 includes a lens cover front portion 18A (side surface), a lens cover right side surface portion 18D (side surface), a lens cover top surface portion 18E (side surface), and a lens cover bottom surface portion 18F (side surface) of the lens cover 18 (cover member). The housing front portion 14A (side surface), the housing right side surface portion 14D (side surface), the housing top surface portion 14E (side surface), and the housing bottom surface portion 14F (side surface) of the projection device main body 2 (housing), respectively. It exists on substantially the same plane. These parts form a flat rectangular parallelepiped shape (rectangular parallelepiped) together with the projection device main body 2 (see FIGS. 1 to 7). As a result, the projection device 1 can be installed and housed in a stable state, and it is possible to prevent one surface from projecting, colliding, and being damaged. In addition, since it has a rectangular parallelepiped shape, it is easy to install and store. Note that 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 apparatus main body 2 (housing), or the projection lens 3 or the projection apparatus may have a gap. The main body 2 may have a leg portion 12 for horizontal placement, a leg portion 13 for vertical placement, projections such as the main body operating portion 6, and recesses for the power connector 9 and the like. Also, a part of the projection lens 3 and/or the projection device main body 2 may be chamfered or the like. Further, "on the same plane" is not limited to being geometrically completely on the same plane. It may deviate within the range of zero.

(Locking in specific state and projection of light related to rotation state)
Locking when the rotating state of the holding portion is in the specific state and projection of light from the light source in relation to the rotating state will be described. FIG. 51 is a flow chart showing the procedure for controlling the locking of the holder and the projection of light. The first rotation position detection unit 70A and the second rotation position detection unit 70B respectively detect the rotation states of the second holding unit 40 and the third holding unit 50 (step S210), 3 It is determined whether or not the holding unit 50 is in a specific state (step S212). “The second holding portion 40 is in a specific state” means that the rotational position of the second holding portion 40 is 0°, 90°, or 180°, and “the third holding portion 50 is in a specific state”. , the rotational position of the third holding portion 50 is 0° (360°), 90°, 180°, or 270°. When both the second holding portion 40 and the third holding portion 50 are in the specific state (YES in step S212), the first locking mechanism 60A (locking mechanism portion) locks the second holding portion 40, and the second holding portion 40 is locked. The lock mechanism 60B (lock mechanism section) locks the third holding section 50 (step S214). When the second holding section 40 and the third holding section 50 are locked, the light source control section 270 projects light from the laser light source 20A (light source) (step S216).

On the other hand, when the second holding portion 40 and/or the third holding portion 50 are in a state other than the specific state (NO in step S212), the locking mechanism 60 (the first locking mechanism 60A, the second locking mechanism 60B) is set to the holding portion ( The second holding portion 40 and the third holding portion 50) cannot be locked. This is because the claw portions (claw portion 64A, claw portion 64B) of the lock mechanism 60 do not fit into the lock groove portions (first lock groove portion 32E, second lock groove portion 51C) at angles other than the specific state of rotation. In this case, the unlocking operation section 11 (the first unlocking switch 11A and the second unlocking switch 11B) (control section) disables the operation related to the locked state (step S218). Alternatively, the power control unit 280 (control unit) disables the operation of turning off the power (step S218). The "operation related to the locked state" is, for example, an operation to lock (an operation to set the locked state) and an operation to unlock the locked holding portion.

The lock mechanism 60 (control section), the OSD image output section 252 (control section), and the display control section 254 (control section) lock the holding section (the second holding section 40 and/or the third holding section 50). A reason for the inability and/or a request to put the holding unit in a specific state is notified (step S220). FIG. 52 shows an example of notification of prompting by the OSD image 99C synthesized with the projected image 98. The message "Cannot be locked in this rotating state" is an example of notification of the reason why the locked state cannot be set, The message "Rotate with" shows an example of notification prompting to put the holder into a specific state. In addition, although the reason and the reminder are notified in the example of FIG. 52, either the reason or the reminder may be notified. By following such notification, the user can quickly put the holder into the locked state. Note that the notification in step S220 may be made by blinking an LED or beeping. When the operation to turn off the power is not allowed, the notification of the reason and the notification of the request to change to the specific state are the same as the above-described notification when the locked state is not allowed.

After the notification in step S220, the light source control unit 270 (control unit) determines whether the mode is set to the first mode or the second mode (step S222). The "first mode" is a mode in which light from the laser light source 20A (light source) is not projected in a state other than the specific state, and the "second mode" is a mode in which light from the laser light source 20A is not projected in a state other than the specific state. This is the mode for projecting light. 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) under the control of the light source control section 270 (control section) (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 under the control of the light source control section 270 (control section) (step S226). The user can set the first mode or the second mode by operating the main body operation section 6, and thereby can arbitrarily set whether or not to perform projection during the rotation operation. In particular, in the projection device 1 of this embodiment, when each holding portion of the projection lens is rotated, the projected image is also rotated. In this case, it is conceivable that the user does not want to visually recognize the projected image during rotation. Therefore, in this embodiment, the user can switch between the two modes.

As described above, when the second holding portion 40 and the third holding portion 50 are not in the specific state, the power off operation is disabled (step S218). The power may be forcibly turned off due to reasons such as the cable being pulled out. However, as shown in FIGS. 36 and 37, by rotating the second holding portion 40 and the third holding portion 50 to the specific state, the claw portions (claw portion 64A and claw portion 64B) are moved to the lock groove portion (first lock groove portion 32E). , second locking groove 51C). In other words, the lock mechanism 60 locks each holder in a specific state even when the power of the projection device 1 is off.

Since the projection device 1 performs the above-described control of the locked state and projection of light related to the locked state, it is possible to appropriately control the rotation of the projection lens.

(Rotation and movement of projection lens, and control of power supply and light source related thereto)
FIG. 53 is a flow chart showing a control procedure for turning off the power source and the light source in relation to the rotating state and moving state. A first rotation position detection section 70A (first detection section) and a second rotation position detection section 70B (second detection section) detect the rotation states of the second holding section 40 and the third holding section 50, respectively. (Step S240). The power control unit 280 determines whether or not an operation to turn off the power (for example, an operation on the power switch 6A) has been input (step S242). The position detection section 70A and the second rotation position detection section 70B determine whether or not the rotation state is the reference state (step S244).

If the rotating state is the retracted state (YES in step S244), the shift control unit 262 (control unit) moves the lens shift mechanism 80 (moving mechanism) to the retracted position (step S246). As a result, the projection lens 3 is moved with respect to the projection apparatus main body 2 (housing), and the projection lens 3 is brought into the "storage state". The “storage position” of the lens shift mechanism 80 is when the side surface of the lens cover 18 is on the same plane as the side surface of the housing 14 . Further, the "reference state" of the projection lens 3 is a case where the rotation state of each holding portion is in the "storage state" and the lens shift mechanism 80 (moving mechanism) is in the "storage position".

40 to 44, the amount of movement of the lens shift mechanism 80 is in the direction indicated by arrow X (horizontal direction when the projection device main body 2 is placed horizontally) and the direction indicated by arrow Y (when the projection device main body 2 is placed horizontally). ) can be defined as the “storage position” of the lens shift mechanism 80 .

After moving to the retracted position, the display control unit 254 and the OSD image output unit 252 (control unit) send a message to the effect that "the power supply and the light source will be turned off" before turning off the power supply and the light source (step S248). The power control unit 280 and the light source control unit 270 (control unit) in FIG. 45 turn off the power source and the light source (laser light source 20A), respectively (step S250). FIG. 54 is a diagram showing an example of notification of a message when turning off the power source and light source. An OSD image 99D synthesized with 98 is displayed. This message is an example of information on changing the rotational state of the projection lens 3, and is an example of information on changing the rotational state to the retracted state (example when change is unnecessary).

The shift control section 262 does not move the lens shift mechanism 80 when the power is turned off and when the rotating state of the holding sections (the second holding section 40 and the third holding section 50) is other than the reference state. Therefore, when the rotating state is not the retracted state (NO in step S244), the shift control unit 262 does not move the lens shift mechanism 80, and the display control unit 254 and the OSD image output unit 252 (control unit) retract. A message prompting a change to the state is sent (step S252). FIG. 55 is a diagram showing an example of notification of a message prompting a change, in which an OSD image 99E synthesized with the projected image 98 displays the message "Please rotate the projection lens to the retracted state." This message is another example of information on changing the rotational state of the projection lens 3, and is another example of information on changing the rotational state to the retracted state (example when change is necessary).

Note that FIG. 53 illustrates a case where the power is turned off after the lens shift mechanism 80 (moving mechanism) is moved to the retracted position (steps S246 to S250). However, the power may be turned off without moving the lens shift mechanism 80 to the retracted position after issuing a notification to change the rotation state of the projection lens 3 to the retracted state. Further, the contents of the flow after the "power-off operation" (step S242) may be changed depending on whether the image is projected or not. For example, the power may be turned off by pressing the power switch 6A once when no image is being projected, and the power may be turned off by pressing the power switch 6A twice when an image is being projected. Further, it is preferable that the power is automatically turned off when the rotating portion (the second holding portion 40 and the third holding portion 50) is in the locked state when the rotating state is the retracted state.

FIG. 56 shows a display example of the OSD image 99F when the power is turned off in step S242. operation. Part (a) of FIG. 8 is an example of display when no projection image is input, and part (b) is an example of display when a projection image 98 is input. Such a display allows the user to easily grasp the operation method.

(Control regarding movement of projection lens)
FIG. 57 is a flow chart showing a control procedure for moving (shifting) the projection lens 3 . The first rotation position detection section 70A (detection section) and the second rotation position detection section 70B (detection section) detect the rotation states of the second holding section 40 and the third holding section 50, respectively (step S260). . In this case, the projection lens 3 and the DMD 22B (see FIG. 35), which is an electro-optical element, move relative to each other in each rotational state of the holding portion. In this embodiment, the shift control unit 262 (control unit) uses the lens shift mechanism 80 (moving mechanism) to project the rotation state of each of the holding units (the second holding unit 40 and the third holding unit 50). Move the lens 3. The shift control section 262 causes the storage section 240 to store information on the movement position of the projection lens 3 . After the rotation state is detected by the detection section, the shift control section 262 refers to the movement position information stored in the storage section 240 for the detected rotation state (step S262). Then, the lens shift mechanism 80 moves the projection lens 3 to the stored movement position (step S264). Since the projection lens 3 is moved to the movement position according to the rotation state, it is possible to perform appropriate control in consideration of the relationship between the two, and to quickly move the projection lens 3 to the movement position according to the rotation state.

When the body operation unit 6 (accepting unit) accepts the user's operation of the lens shift mechanism 80 (moving mechanism) (YES in step S266), the shift control unit 262 (control unit) receives the content of the accepted operation (moving direction and amount), the projection lens 3 is moved by the lens shift mechanism 80 (step S268). In this case (when the movement position is changed by the user's operation), shift control unit 262 (control unit) updates the information on the movement position stored in storage unit 240 based on the content of the received operation. Store (step S270). By updating the movement position information, the user can move the projection lens to a desired movement position. Further, after the information is updated, the shift control section 262 can move the projection lens 3 to the updated and stored movement position, and the user does not need to repeat the same movement operation every time of use.

The above embodiment is one example of changing the relative positional relationship between the projection lens 3 and the electro-optical element. For example, the shift control section 262 may move only the second holding section 40 and the third holding section 50 of the projection lens 3 (part of the projection lens 3) instead of the entire projection lens 3. Also, for example, the shift control section 262 may move the DMD 22B, which is an electro-optical element.

[Embodiment of Image Rotation Correction]
Next, rotation correction of the projection image and the OSD image will be described.

FIG. 58 is a flow chart showing an embodiment of image rotation correction by the CPU 210 and the display control unit 254 .

In FIG. 58, a CPU 210 functioning as a control section that performs rotation correction of an image controls a first rotation position detection section (first detection section) 70A and a second rotation position detection section (second detection section) 70B. A detection signal indicating the rotational positions of the second holding portion 40 and the third holding portion 50 is input. The CPU 210 also receives a detection signal indicating the attitude of the projection device main body 2, which is the main body of the projection device 1, from the main body orientation detection section (third detection section) 23 (step S300).

The first rotation position detection unit 70A and the second rotation position detection unit 70B function as an orientation information acquisition unit that acquires orientation information indicating the orientation of the projection lens 3 (hereinafter referred to as "lens orientation"). The detection unit 23 functions as an orientation information acquisition unit that acquires orientation information indicating the orientation of the projection device main body 2 (hereinafter referred to as “main body orientation”).

The CPU 210 first determines whether or not the projection lens 3 is in the locked state based on the detection signals input from the first rotation position detection section 70A and the second rotation position detection section 70B (step S302). The locked state of the projection lens 3 means that the rotation positions of the second holding portion 40 are 0°, 90°, and 180°, and the rotation positions of the third holding portion 50 are 0°, 90°, 180°, and 270°. , and the unlocking operation by the first locking mechanism 60A and the second locking mechanism 60B is released.

The projection lens 3 can take 12 lock states. Here, there are twelve specific "lens attitudes" of the projection lens 3 in which the projection lens 3 is locked, as shown in FIGS. Then, the CPU 210 determines in which specific "lens orientation" the current projection lens 3 is in a detection signal (detection result) input from the first rotation position detection section 70A and the second rotation position detection section 70B. ) can be determined.

When it is determined that the projection lens 3 is locked, the CPU 210 determines whether the projection lens 3 is stored in the recess 15 of the projection apparatus main body 2 (step S304). The stored state is one mode of the locked state of the projection lens 3, and refers to a state in which the rotation position of the second holding portion 40 is 90° and the rotation position of the third holding portion 50 is 0° (FIG. 7). reference).

When the CPU 210 determines that the projection lens 3 is in the locked state and that the projection lens 3 is not in the retracted state, the DMD 22B functioning as an image output unit outputs to the projection lens 3 according to the change in the "lens attitude" or the "main body attitude". It is determined whether or not the projected image to be projected has been rotated from the "reference position" (step S306). The “body posture” can be determined by a detection signal from the body posture detection section 23 .

Here, the “reference position” means, for example, when the camera is held horizontally, an image with a horizontally long aspect ratio is captured, and the image is projected onto the screen without rotation correction, the image is upright on the screen. Refers to the rotation position of the image. Also, the angle of the image (image angle viewed along the projection direction) at the 'reference position' based on the 'lens orientation' and 'main body orientation' is assumed to be 0°, and the image angle in the clockwise direction is assumed to be positive.

When the CPU 210 determines that the image is rotated with respect to the "reference position", the CPU 210 determines whether the image is rotated with respect to the "reference position" by 90°, 180°, or 270° (-90°). Determine (step S308).

The display control unit 254, which functions as a control unit that performs image rotation correction, receives the determination result in step S308 from the CPU 210 as input. This determination result corresponds to an image rotation correction command. When the image is rotated by 90° with respect to the “reference position”, the display control unit 254 rotates the OSD image input from the OSD image output unit 252 by 270°. (-90°) is rotated (step S310). That is, the OSD image emitted from the DMD 22B to the projection lens 3 is rotated by 270° and corrected. As a result, in the OSD image projected on the screen, characters (character images) of the OSD image are erected on the screen, making it easy to read.

The DMD 22B of this example has a horizontally long aspect ratio, but the OSD image is assumed to have an aspect ratio (for example, 1:1) that does not cut off a part of the OSD image even if it is rotated by 90° or 270°. preferably. If a DMD with an aspect ratio of 1:1 (square DMD) is used as the DMD 22B, the aspect ratio of the OSD image can be any aspect ratio.

On the other hand, the display control section 254 does not rotate the projected image input from the projected image output section 250 when the image is rotated 90° with respect to the “reference position”. This is because if the projection image is rotated by 90° or 270°, both ends of the projection image are cut off. Correction for rotating the projected image by 0° and 360° does not correspond to “rotational correction”.

When the projection image is rotated by 180° with respect 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), and transmits the image from the DMD 22B to the projection lens 3. The projection image to be emitted is rotated by 180°, and the OSD image projected on the screen is also rotated by 180° (step S314).

As a result, the projection image and the OSD image are rotationally corrected so that the top and bottom directions of the images are correct. Note that line symmetry correction is also included in 180° rotation correction.

Further, when the projection image is rotated by 270° with respect to the “reference position”, the display control unit 254 rotates the projection image input from the projection image output unit 250 by 90° (step S316). On the other hand, the display control unit 254 does not correct the rotation of the projected image when the image is rotated 270° with respect to the "reference position".

In the embodiment shown in FIG. 58, the display control unit 254 rotates and corrects the OSD image and the projection image based on the determination result of the "lens orientation" and the "main body orientation". However, the display control unit 254 can determine the “lens attitude” and the “main body attitude” determined by the detection signals of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the main body attitude detection unit 23, A table in which the relationship between the OSD image and the rotation correction of the projection image is registered may be used. Then, the display control unit 254 determines whether or not to correct the rotation of the OSD image and the projection image 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 main body posture detection unit 23. , the correction angle may be obtained.

In addition, the detection units of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the main body posture detection unit 23 receive an instruction (rotation instruction) for the "lens posture" and the "main body posture" from the user. Also includes a reception unit that receives instructions for Furthermore, the present invention can also be applied to a projection apparatus in which the "main body attitude" does not change.

FIGS. 59 to 62 are diagrams showing the rotation correction of the projection image and the OSD image, which are rotationally corrected as described above, and particularly show the case where the projection device main body 2 is placed horizontally.

When the projection device main body 2 is placed horizontally, there are a plurality of (12) specific lens orientations that are locked. are set to 1 to 12 in association with the 12 lens orientations shown in FIGS.

As shown in FIGS. 59 to 62, lens posture No. but for lens poses of 2, 5, 8, and 11 (FIGS. 6, 11, 14, and 17), the image angles seen along the projection direction are 0°, 90°, and 180°, respectively. , and 270°. Note that the lens orientation No. However, 2, 5, 8, and 11 lens poses are representative examples when the image angles are 0°, 90°, 180°, and 270°, respectively.

When there is no image input, only the OSD image is projected as shown in the upper part of FIGS. 59-62. When there is image input, a composite image of the projection image and the OSD image is projected as shown in the lower stages of FIGS. 59 to 62 .

The circular areas shown in FIGS. 59 to 62 indicate the range that can be projected by the projection lens 3, and "top" indicates the orientation of the image before rotation correction.

As shown in FIGS. 59 to 62, the OSD image is rotated by 270° (−90°), 180°, and 90° when the image angle is 90°, 180°, and 270°. As a result, the characters of the OSD image are always displayed erect.

On the other hand, if the input projection image has an image angle of 180°, the image is rotated by 180°. Therefore, when the image angle is other than 180 (90°, 270°), the projection image is not rotated and displayed vertically (vertical display).

Thus, the projection image and the OSD image have different rotation correction methods.

<Another Embodiment of Correction of Rotation of Projected Image>
FIG. 63 is a flow chart showing another embodiment of rotation correction of a projection image. In FIG. 63, the same step numbers are given to the parts common to the flow chart shown in FIG. 58, and detailed description thereof will be omitted.

In FIG. 63, when the CPU 210 determines that the image rotates with respect to the "reference position" due to a change in the "lens orientation" or the "main body orientation" ("Yes" in step S306), the CPU 210 corrects the rotation of the projected image. It is determined whether the first correction mode or the second correction mode is set as the correction mode (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 main body operation section 6 .

Here, the first correction mode is a correction mode for correcting the projection image by 180° when the image is rotated 180° with respect to the “reference position”. In the second correction mode, when the image is rotated by 180° with respect to the "reference position", the projected image is corrected by rotating it by 180°. This is a correction mode for 180° rotation correction.

When CPU 210 determines that the first correction mode is set in step S320, CPU 210 subsequently determines whether or not the image is rotated 180° with respect to the "reference position" (step S322).

The display control unit 254 receives the determination result in step S322 from the CPU 210 . This determination result corresponds to an image rotation correction command. When the image is rotated by 180° with respect to the “reference position”, the display control unit 254 rotates the projection image input from the projection image output unit 250 by 180°. Rotate (step S324).

On the other hand, in the case of the first correction mode, when the image is rotated by 90° with respect to the “reference position”, or when the image is rotated by 270°, the display control unit 254 changes the projection image input from the projection image output unit 250 to Do not rotate.

When CPU 210 determines that the second correction mode is set in step S320, CPU 210 subsequently determines whether or not the image is rotated 270° with respect to the "reference position" (step S326).

The display control unit 254 receives the determination result 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° with respect to the "reference position". On the other hand, when the image is not rotated by 270° with respect to the “reference position” (that is, when rotated by 90° and 180°), the display control unit 254 rotates the projection image input from the projection image output unit 250 by 180°. (Step S324).

FIG. 64 is a diagram summarizing the rotational correction of the projection image to be rotationally corrected as described above, and shows the case where the projection device main body 2 is placed horizontally as in FIG.

As shown in FIG. 64, lens posture No. but for lens poses of 2, 5, 8, and 11, the image angles seen along the projection direction are 0°, 90°, 180°, and 270°, respectively.

In the case of the first correction mode, if the image angle is 180°, 180° rotation correction is performed. As a result, the projection image that is projected horizontally is rotated and corrected so that the vertical direction is correct.

On the other hand, in the case of the second correction mode, if the image angle is 90 degrees or 180 degrees, 180 degrees rotation correction is performed. As a result, the projection image that is projected horizontally is rotated and corrected so that the vertical direction is correct. Also, the projection image projected vertically is rotationally corrected so that the "top" of the projection image in the vertical direction is always on the left side in FIG. This makes it possible to align the top and bottom directions of the projection images that are vertically projected.

In this example, in the case of the second correction mode, the rotation correction is performed so that the "top" of the projected image in the vertical direction is on the left side. may be rotationally corrected.

Further, when a square DMD is used as the DMD 22B, the correction angle of the projection 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.

<Embodiment of OSD Image Displayed by Projection Device 1>
FIG. 65 is a diagram showing an example of an OSD image displayed by the projection device 1, particularly an OSD image related to an operation manual.

In the example shown in FIG. 65, when the orientation of a vertically long projection image (the upper direction of the image is the left side) projected on the projection surface (wall) is changed on the same projection surface (in this example, the vertical direction of the projection image is is displayed in the correct vertical direction), an OSD image is displayed to support the operation of the "body orientation" and "lens orientation". The OSD image in this case is support information that supports the operation of the "body orientation" and the "lens orientation".

The CPU 210 shown in FIG. 45 discriminates the "main body posture" of the projection apparatus main body 2 from the detection signal of the main body posture detection section 23, and detects the respective detection signals of the first rotation position detection section 70A and the second rotation position detection section 70B. , the "lens orientation" of the projection lens 3 can be determined.

When the CPU 210 receives an instruction input requesting operation support for the "main body orientation" and "lens orientation" from the main body operation unit 6, the CPU 210 displays the corresponding "OSD image" based on the determined current "main body orientation" and "lens orientation." ” (OSD image shown in FIG. 56) is output from the OSD image output unit 252 .

By viewing the OSD image shown in FIG. 65, the user can know how to operate the "body orientation" and "lens orientation". In this example, by rotating the horizontal projection device main body 2 by 90° and by rotating the third holding portion 50 of the projection lens 3 shown in FIG. Can be oriented vertically.

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

In FIG. 66, when the projection device 1 is currently projecting the projection image onto the wall surface W1, the support information for supporting the "body orientation" and the "lens orientation" when projecting onto the wall surface W2 different from the wall surface W1 is displayed. It is

Here, it is displayed that when the third holding portion 50 of the projection lens 3 shown in FIG. 33 is rotated by 90° in order to project the projection image onto the wall surface W2, the projection image is also rotated (rotated by 90°). . That is, the OSD image shown in FIG. 56 notifies an example of a change in posture of the projection image when the rotation state of the projection lens 3 is changed. By viewing the OSD image shown in FIG. 66, the user understands that the third holding portion 50 of the projection lens 3 should be rotated by 90° to display the projection image vertically on the wall surface W2.

On the other hand, when the horizontally placed projection device main body 2 is rotated by 90° on the plane on which the projection device main body 2 is installed (when the orientation on the plane is changed), the same projection image as that projected on the wall surface W1 is displayed. , information to be projected onto a wall surface W2 different from the wall surface W1 is displayed. By viewing the OSD image shown in FIG. 66, the user understands that if he wants to display the projection image on the wall surface W2 in landscape orientation, he should rotate the projection device main body 2 by 90° on the plane on which it is installed.

Although not shown in FIG. 65 and FIG. 66, information (portrait, landscape, rotation angle, etc.) regarding changes in the projection direction and orientation of the projection image when the projection apparatus main body 2 is switched from landscape to portrait orientation. ), which can be used as support information for projecting a desired projection image onto the projection surface.

In the embodiment shown in FIGS. 65 and 66, the OSD image is used to notify the user of support information for supporting the operation of the "body orientation" and "lens orientation". However, the projection device 1 is not limited to the notification unit using the OSD image, and if the projection device 1 has a display such as a liquid crystal monitor, the display (notification unit) displays the support information. You may do so. Further, if the projection device 1 has an audio notification function, the support information may be notified by the audio notification function.

<Projection device kit>
The projection device kit records the projection device 1 and support information (for example, support information as shown in FIGS. 65 and 66) for supporting operations when projecting a projection image on an arbitrary projection surface in a desired posture. and an information medium.

When the support information is recorded on the information medium, the projection device 1 of the projection device kit stores the support information for supporting the operation of the "body orientation" and "lens orientation" as shown in FIGS. It does not have to be equipped with a function to notify with an image.

The information medium includes, for example, recording media on which digital information is recorded, such as paper media, CD-ROMs (Compact Disc Read Only Memory), and DVDs (Digital Versatile Disc).

The information medium is packaged with the projection device 1 and can be distributed as a projection device kit.

The user can acquire from the information medium the support information that supports the operation when projecting the projection image onto an arbitrary projection surface in a desired orientation.

The information recorded on the information medium includes not only the support information itself but also access information (for example, URL (Uniform Resource Locator)) for accessing the website and obtaining the support information from the website.

[Embodiment of Image Shift Correction]
Next, control of the lens shift mechanism 80 (see FIG. 40) for moving the projection lens 3 with respect to the DMD 22B, which is the electro-optical element shown in FIG. 35, will be described.

FIG. 67 shows the projection apparatus 1 and projection when the projection apparatus main body 2 is placed horizontally and the orientation of the projection lens 3 ranges from the second lens orientation to the sixth lens orientation (lens orientation Nos. 2 to 6). FIG. 4 is a schematic diagram showing a shift state of an image; 8 to 12 are perspective views of the projection device 1 when the projection device main body 2 is placed horizontally and the posture of the projection lens 3 is in the second to sixth lens postures. That's right.

FIG. 68 shows the projection device 1 when the projection device main body 2 is horizontally placed and the orientation of the projection lens 3 is from the seventh lens orientation to the twelfth lens orientation (lens orientation Nos. 7 to 12). and a schematic diagram showing a shift state of a projection image. 13 to 18 are perspective views of the projection device 1 when the projection device main body 2 is placed horizontally and the orientation of the projection lens 3 is from the seventh lens orientation to the twelfth lens orientation. That's right.

On the other hand, FIG. 69 shows the projection device 1 when the projection device main body 2 is placed vertically and the orientation of the projection lens 3 is from the second lens orientation to the sixth lens orientation (lens orientation Nos. 2 to 6). and a schematic diagram showing a shift state of a projection image. 20 to 24 are perspective views of the projection device 1 when the projection device main body 2 is horizontally placed and the projection lens 3 is in the second to sixth lens postures. That's right.

FIG. 70 shows the projection device 1 when the projection device main body 2 is placed vertically and the orientation of the projection lens 3 is from the seventh lens orientation to the twelfth lens orientation (lens orientation Nos. 7 to 12). and a schematic diagram showing a shift state of a projection image. 25 to 30 are perspective views of the projection device 1 when the projection device main body 2 is placed vertically and the orientation of the projection lens 3 is in the seventh to twelfth lens orientations. That's right.

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

Due to this movement of the projection lens 3, the position of the image display section 22 with respect to the first optical axis Z1 of the projection lens 3 shown in FIG. A projected image can be shifted.

A circular area shown in FIGS. 67 to 70 indicates a range that can be projected by the projection lens 3, and a rectangular area within the circular area indicates a projection image. By moving the projection lens 3 by the lens shift mechanism 80, the projection image can be shifted within the projectable circular area. If the projection image is shifted beyond the projectable circular area (when the projection lens 3 is moved by the lens shift mechanism 80), the projection image emitted from the video display unit 22 interferes with the projection lens 3. Then, "vignetting" occurs.

As shown in FIGS. 67 to 70, the direction in which the projected image is shifted differs depending on the “lens orientation” of the projection lens 3 and the “main body orientation” of the projection device main body 2. FIG. The details of the direction in which the projected image is shifted will be described later.

Next, definitions of the "lens orientation" and the "shift correction direction" for determining the "direction of shifting the projected image" will be described.

FIG. 71 is a drawing defining the position of the projection lens 3 with respect to the projection apparatus main body 2. FIG.

The position of the projection lens 3 with respect to the projection device main body 2 is defined based on the position of the projection lens 3 with respect to the projection device main body 2 when the projection device main body 2 is placed horizontally. That is, FIG. 71(A) shows that when the projection device main body 2 is placed horizontally, the output optical system of the projection lens 3 (the second optical system fifth lens group G25 in FIG. 35) is positioned below the projection device main body 2. Located in In this case, the position of the projection lens with respect to the projection device main body is defined as the lower side regardless of whether the projection device main body 2 is placed horizontally or vertically.

Similarly, in FIG. 71B, the output optical system of the projection lens 3 is located above the projection device main body 2 when the projection device main body 2 is placed horizontally. In this case, the position of the projection lens with respect to the projection device main body is defined as the upper side regardless of whether the projection device main body 2 is placed horizontally or vertically. In addition, in FIGS. 71C and 71D, the output optical system of the projection lens 3 is positioned at the same center of the main body as the main body 2 of the projection device. In this case, the position of the projection lens with respect to the main body of the projection device is defined as the center position of the main body (same).

The "position of the projection lens with respect to the main body of the projection apparatus" defined above is used to determine the direction in which the projected image is shifted, as will be described later.

According to the above definition, the lens posture No. of the projection lens 3; is 2, 4, 6, or 8 (see FIGS. 67 and 68), the position of the projection lens 3 with respect to the projection device main body 2 is "upper" (upper
side). Also, the lens posture No. of the projection lens 3 is is 3, 5, 7, or 9, the position of the projection lens 3 with respect to the projection apparatus main body 2 is on the "lower side". Also, the lens posture No. of the projection lens 3 is is 10, 11, or 12, the position of the projection lens 3 with respect to the projection device main body 2 is the "position at the center of the main body" (same).

FIG. 72 is a diagram for defining whether or not the projection device main body 2 (main body) exists in front of the projection direction.

In the lens postures of FIGS. 72A and 72B, the emission direction is along the third optical axis Z3 of FIG. A part of the projection device main body 2 exists on the side. In such a lens orientation, it is defined that the projection apparatus main body exists in front of the projection direction (yes).

On the other hand, in the lens posture of FIG. 72(C), along the third optical axis Z3 in FIG. Part of the projection device main body 2 does not exist. Such a lens posture is defined as "there is no projection apparatus main body in front of the projection direction" (no).

Therefore, lens attitude No. is 2, 3, 4, 5, 6, or 7, the main body exists in front of the projection direction, and lens attitude No. is 8, 9, 10, 11, 12, there is no main body in front of the projection direction.

When the projection device main body 2 exists in front of the projection direction (when "main body in front of projection direction" in FIGS. 75(A), (B) and FIGS. 76(A), (B) is "yes"), the projection device The main body 2 may cause "vignetting" of the projected image. On the other hand, when the main body does not exist in front of the projection direction (when "no" is set for "main body in front of projection direction" in FIGS. 75(A), (B) and FIGS. 76(A), (B)), the projection device main body "Vignetting" of the projected image due to 2 does not occur.

Information on whether or not there is a main body in front of the projection direction is used to determine the direction in which to shift the projection image.

FIG. 73 is a diagram defining the "shift correction direction" of the projection image.

In the upper part of FIG. 73, the projection lens 3 is shown in lens posture No. 3 of the projection lens 3 shown in FIG. 6, and the lens attitude No. of the projection lens 3 shown in FIG. is 7, the projected image is shown.

The projection images shown in FIG. 73 are each projected vertically, but as shown in FIG. 73, the "shift correction direction" of the projection images is defined based on the actual "projection images".

For example, the "shift correction direction" for the "projected image" in the upper part of FIG. The direction of shift correction when shifting the "projected image" to 1 is downward. On the paper surface of FIG. 73, the direction of shift correction when shifting the "projected image" upward is left, and the direction of shift correction when shifting the "projected image" downward is right. (right).

<Basic idea of the direction of shifting the projected image when the main body of the projection device is placed horizontally>
(1) When "vignetting" occurs in the projected image due to the main body, the shift is made in the direction of reducing the "vignetting".

(2) When projecting a projection image onto a wall surface, the projection image is shifted in a direction away from the main body.

Projection lens is above the main body: "Projection image" is shifted upward (As mentioned above, please note that the shift direction based on the "projection image" and the "shift correction direction" do not necessarily match.)
Projection lens below the main body: "Projected image" is shifted downward Projection lens is in the center of the main body: "Projected image" is shifted upward (Assuming that the projector is placed on the floor, shift it away from the floor.)
(3) When the projection image is projected onto the top surface or the floor surface, the projection image shifts away from the main body.

When the "shift correction direction" is determined by the above (1), (2), and (3), (1) and (2), or (1) and (3) may contradict each other. In this case, priority is given to the "shift correction direction" according to (1).

Based on the above basic concept of the "shift direction", the lens attitude No. 1 shown in FIGS. is 2 or 9, the "shift correction direction" is the upward direction. is 3, 8, and 10, the "shift correction direction" is downward. Also, lens attitude No. is 4, 5, 11, 12, the "shift correction direction" is the right direction. is 6 or 7, the "shift correction direction" is the left direction.

Lens attitude No. shown in FIGS. When is 2 to 7, the main body exists in front of the projection direction, and "vignetting" may occur in the projected image. Therefore, in the case of these lens orientations, the projected image is shifted in the direction of reducing the "vignetting". Note that the lens orientation No. is 6 or 7, "vignetting" occurs in the projected image even after the shift correction.

Lens posture No. shown in FIGS. When is 8 to 10, there is no main body in front of the projection direction, and the projection image is projected toward the wall. Therefore, in the case of these lens attitudes, the projection image is shifted in the direction away from the projection device main body 2 according to the definition of "the position of the projection lens with respect to the main body" shown in FIG. When the projection lens 3 is positioned above the projection device main body 2 (lens orientation No. 8) and when positioned at the center of the projection device main body 2 (lens orientation No. 10), the projection is actually projected onto the wall surface. In the "projected image" standard, the projected image is shifted upward (downward according to the definition of "shift correction direction"). Further, when the projection lens 3 is positioned below the main body 2 of the projection device, the "projection image" actually projected on the wall surface is directed downward (according to the definition of "shift correction direction", upward). shifts the projected image to

Lens posture No. shown in FIGS. is 11 and 12, there is no "main body in front of the projection direction", and the projection image is projected in the direction of the ceiling and the direction of the floor, respectively. Therefore, in the case of these lens postures, the projection image is shifted in the direction away from the projection device main body 2 .

<Basic idea of the direction of shifting the projected image when the main body of the projection device is vertically placed>
(1) When "vignetting" occurs in the projected image due to the main body, the shift is made in the direction of reducing the "vignetting".

(2) When the projection image is projected onto the wall surface, the projection image shifts away from the floor.

(3) When the projection image is projected on the top surface or the floor surface, the projection image shifts away from the main body.

Based on the above basic concept of the "shift direction", the lens attitude No. However, the "shift correction direction" in the cases of 2, 5 and 9 shown in FIGS. is 3, 4, or 8, the "shift correction direction" is downward. Also, lens attitude No. are 11 and 12, the "shift correction direction" is the right direction. is 6, 7, or 10, the "shift correction direction" is the left direction.

Lens attitude No. of the projection lens 3; 2 to 7 shown in FIGS. 69 and 70, there is a "main body in front of the projection direction", and "vignetting" may occur in the projected image. Therefore, in the case of these lens orientations, the projected image is shifted in a direction to reduce "vignetting". Note that the lens orientation No. is 6 or 7, "vignetting" occurs in the projected image even after the shift correction.

Lens attitude No. of the projection lens 3; When is 8 to 10, there is no main body in front of the projection direction, and the projection image is projected toward the ceiling. Therefore, in the case of these lens postures, the projection image is shifted in a direction away from the projection device main body 2 .

Lens posture no. 11 and 12, there is no main body in front of the projection direction, and the projected image is projected toward the wall. Therefore, in the case of these lens orientations, the projected image is shifted in the direction away from the floor.

<Shift amount>
Next, the amount of shift of the projection image (the amount of movement of the projection lens 3 by the lens shift mechanism 80) will be described.

FIG. 74 is a plan view of the housing 14 of the projection device main body 2 for explaining the shift amount of the projected image when the projection device main body 2 is placed horizontally (when the projection device main body 2 is placed horizontally, the housing 14 is viewed from above). view of the body 14).

As shown in FIG. 74, the housing 14 has a base portion 14G and a protruding portion 14H that protrudes from the base portion 14G. A projection lens 3 is installed in the recess 15 .

In FIG. 74, the first direction in which the protrusion 14H and the recess 15 are adjacent to each other has the first A direction, which is one of the first directions, and the first B direction, which is the other of the first directions. 14H is located on the first A direction side.

A second direction that intersects with the first direction has a second A direction that is one of the second directions and a second B direction that is the other of the second directions, and the base portion 14G is positioned on the second A direction side.

The projection device 1 having the projection lens 3 installed in the casing 14 and the recessed portion 15 having the above-described shape has a case where "the position of the projection lens with respect to the main body of the projection device" is on the upper side or the lower side, and the projection lens 3 is 1A. When a projection image is projected in the directions 1B and 2A, "the main body of the projection apparatus exists in front of the projection direction", and "vignetting" occurs in the projection image. Note that the lens posture No. of the projection lens 3 when the projection lens 3 projects the projection image in the 1A direction, 1B direction, 2A direction and 2B direction. are 6, 4, 2, and 8, respectively (see FIGS. 67 and 68).

Therefore, when the upper surface of the housing 14 shown in FIG. 74 is used as the "reference plane", the projection direction of the projection lens 3 is the direction within the same plane as the "reference plane", and the direction intersects the direction within the same plane. The shift direction of the projection image is made different between the direction in which the projection image is shifted.

That is, in the case of the "lens attitude" shown in FIGS. 71A and 71B (see lens attitude Nos. 5 and 6 in FIG. 67), the direction in the same plane as the "reference plane" and the "reference plane" Shift the projected image in the direction perpendicular to the plane. On the other hand, in the case of the "lens orientation" shown in Figs. 71(C) and (D) (see lens orientation Nos. 11 and 12 in Fig. 68), the projected image is only in the direction within the same plane as the "reference plane". cannot be shifted, it is shifted in a direction in the same plane as the "reference plane".

When the projection direction of the projection lens 3 is in the same plane as the "reference plane" of the projection apparatus main body 2, the direction in the same plane as the "reference plane" is required in order to reduce the "vignetting" of the projected image. Shift the projected image in the cross direction. When the projection direction of the projection lens 3 intersects the "reference plane" of the projection apparatus main body 2, the projection image is shifted in the direction within the same plane as the "reference plane".

Further, it is preferable to vary the amount of shift of the projected image according to the "lens orientation". 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 made larger than when it is on the side opposite to the side where the housing 14 is located. The shift amount of the projected image varies depending on the presence or absence of "vignetting" of the projected image and the magnitude of the "vignetting" depending on the "lens orientation". Different shift amounts are preferred. That is, the greater the "vignetting", the greater the amount of shift of the projection image, thereby reducing the "vignetting" of the projection image.

In the example shown in FIG. 74, the "vignetting" when the projection lens projects the projection image in the 1A direction is greater than the "vignetting" when projecting the projection image in the 1B and 2A directions. Therefore, when the projection image is projected in the second B direction, no "vignetting" occurs.

Therefore, when the projection lens 3 projects in the first A direction, the shift amount of the projection lens 3 is made larger than when the projection lens 3 projects in the first B direction. When the projection lens 3 projects in the second A direction, the shift amount of the projection lens 3 is set larger than when the projection lens projects in the second B direction. When projecting, the shift amount of the projection lens 3 is made larger than when the projection lens 3 projects in the second B direction.

In the example shown in FIG. 74, the shift amount when the projection lens 3 projects the projection image in the 1A direction side is +3, and the shift amount when the projection image is projected in the 1B direction side and the 2A direction side is +2. 5, 2 The shift amount when projecting the projected image in the B direction side is +2, but the numerical values (+3, +2.5, +2) indicating these shift amounts indicate the relative magnitude of each shift amount. Numeric value.

Note that the shift amount of the projected image is not limited to the case where it is changed according to the "lens attitude". You can make it bigger.

<Image rotation correction and shift correction>
75 to 78 are charts summarizing image rotation correction and shift correction.

75(A), (B) and FIGS. 76(A), (B) show image rotation correction, shift correction, etc. for each of 12 different lens orientations when the projection apparatus main body 2 is placed horizontally. 77(A), (B) and FIGS. 78(A), (B) show image rotation correction, shift correction, etc. for each of 12 different lens orientations when the projection apparatus main body 2 is placed vertically. there is

Note that the lens posture No. of the projection lens 3 is When is 1, the projection lens 3 is in a retracted state in which projection is not possible, and thus rotation correction and shift correction of the image are not performed.

75(A), (B) and FIGS. 76(A), (B), the projection apparatus main body 2 is placed horizontally, and the lens orientation of the projection lens 3 is No. is 11 and 12, the projected image is projected on the top surface and the floor surface, respectively, and the "shift amount" in this case is set to +1. Lens posture no. This is because, in the case of the "lens postures" of 11 and 12, the "vignetting" of the projected image does not occur.

Similarly, according to FIGS. 77(A), (B) and FIGS. 78(A), (B), when the projection device main body 2 is placed vertically, the projection lens 3 in lens posture No. is 2 or 3, the projection image is projected on the floor surface, respectively, and the lens attitude No. When is 8 to 10, the projection image is projected on the top surface respectively, but the former "shift amount" is set to +1.5, and the latter "shift amount" is set to +1. It should be noted that these "shift amounts" are merely examples, and are not limited to these. Also, the "shift amount" may be fixed to the maximum value of the shiftable range. Furthermore, depending on the "lens posture", a mode in which no shift correction is performed is also conceivable.

Also, when the projection device main body 2 is placed horizontally, the projection device main body 2 is usually installed with the horizontal placement legs 12 facing the floor surface (FIG. 1), but the horizontal placement legs 12 are placed on the top surface. It can also be installed facing the side.

When the projection device main body 2 is installed with the legs 12 for horizontal placement directed toward the top surface, the amount of rotation correction of the OSD image is ±1. It is necessary to rotate by 180°, and similarly, the correction amount of the projected image also needs to be rotated by ±180° compared to the case where the legs 12 for horizontal placement are installed facing the floor. Note that the "main body posture" when the projection device body 2 is installed with the horizontal placement legs 12 directed toward the top surface can be detected by a body posture detection unit 23 configured by an acceleration sensor.

FIG. 79 is a flow chart showing an embodiment of image shift correction by the CPU 210 and the shift control unit 262 . The same step numbers are given to the parts common to the flowchart showing the embodiment of "rotational correction of image" shown in FIG. 57, and detailed description thereof will be omitted.

In FIG. 79, when the CPU 210, which functions as a control unit that performs image shift correction, determines that the projection lens 3 is in the locked state and not in the stored state by the processing of steps S300, S302, and S304, the CPU 210 continues. Then, it is determined whether or not the "main body posture" is horizontal (step S330). The “body posture” can be determined by a detection signal from the body posture detection section 23 .

When the "body orientation" is horizontal, the CPU 210 determines that the current "lens orientation" is lens orientation No. 2, No. 9 is determined (step S332).

The shift control unit 262, which functions as a control unit that performs image shift correction, receives the lens posture number from the CPU 210 as the “lens posture”. 2, No. 9 is input, the lens shift mechanism 80 is driven and controlled to shift the projected image upward (upward in the definition of the "shift correction direction") (step S338).

The current "lens attitude" is the lens attitude No. 2, No. 9, the CPU 310 determines whether the lens orientation No. 3, No. 8, No. 10 is determined (step S334). The shift control unit 262 receives the lens posture No. from the CPU 210 as the “lens posture”. 3, No. 8, No. 10, drive control is performed on the lens shift mechanism 80 to shift the projected image in the downward direction defined by the "shift correction direction" (step S338).

The current "lens attitude" is the lens attitude No. 3, No. 8, No. 10, the CPU 310 determines whether the lens orientation No. 6, No. 7 is determined (step S336). The shift control unit 262 receives the lens posture No. from the CPU 210 as the “lens posture”. 6, No. 7 is inputted, the lens shift mechanism 80 is driven and controlled to shift the projected image in the left direction defined by the "shift correction direction" (step S348).

According to the determinations in steps S332, S334, and S336, the current "lens attitude" is any lens attitude number. (“No” in step S336), the current “lens orientation” is the remaining lens orientation No. 4, No. 5, No. 11, No. 12. In this case, the shift control unit 262 drives and controls the lens shift mechanism 80 to shift the projected image in the right direction defined by the "shift correction direction" (step S350).

On the other hand, if it is determined in step S330 that the "main body orientation" is vertical, the CPU 210 determines that the current "lens orientation" is lens orientation No. 2, No. 5, No. 9 is determined (step S342).

The shift control unit 262 receives the "lens attitude" from the CPU 210 as No. 2, No. 5, No. 9 is input, the lens shift mechanism 80 is driven and controlled to shift the projection image upward defined by the "shift correction direction" (step S338).

The current "lens attitude" is the lens attitude No. 2, No. 5, No. 9, the CPU 310 determines whether the lens orientation No. 3, No. 4, No. 8 is determined (step S344). The shift control unit 262 receives the lens posture No. from the CPU 210 as the “lens posture”. 3, No. 4, No. 8 is input, the lens shift mechanism 80 is driven and controlled to shift the projection image downward defined by the "shift correction direction" (step S340).

The current "lens attitude" is the lens attitude No. 3, No. 4, No. 8, the CPU 310 determines whether the lens orientation No. 6, No. 7, No. 10 is determined (step S346). The shift control unit 262 receives the lens posture No. from the CPU 210 as the “lens posture”. 6, No. 7, No. 10, the lens shift mechanism 80 is drive-controlled to shift the projection image in the left direction defined by the "shift correction direction" (step S348).

According to the determinations in steps S342, S344, and S346, the current "lens attitude" is any lens attitude number. ("No" in step S346), the current "lens orientation" is the remaining lens orientation No. 11, No. 12. In this case, the shift control unit 262 drives and controls the lens shift mechanism 80 to shift the projected image in the right direction defined by the "shift correction direction" (step S350).

In the embodiment shown in FIG. 79, the shift correction of the projected image is performed based on the determination result of the "lens attitude" and the "main body attitude", but the information of the shift correction direction of the projected image is not acquired from the shift correction table. may The table for shift correction includes a table that can be selected when projecting a projection image determined by detection signals from the first rotation position detection section 70A, the second rotation position detection section 70B, and the main body attitude detection section 23. A relationship between a plurality of "lens attitudes" and "main body attitudes" and the shift correction direction (including the shift amount) of the projected image is registered in advance. Information on the shift correction direction of the projection image may be obtained from the table based on the respective detection signals from the first rotation position detection section 70A, the second rotation position detection section 70B, and the main body attitude detection section 23. FIG.

Further, as each detection unit of the first rotation position detection unit 70A, the second rotation position detection unit 70B, and the main body posture detection unit 23, a reception unit that receives instructions of the "lens posture" and the "main body posture" from the user. Also includes

Furthermore, in the present embodiment, when performing shift correction of a projected image, the projection lens is moved within a plane intersecting the axial direction of the rotation axis (first rotation axis) of the projection lens. It is also possible to move the DMD (electro-optical device) side that emits the projected image to the projection lens without moving the projection lens and the electro-optical device.

Although the embodiments and other aspects of the present invention have been described above, the present invention is not limited to the above-described embodiments and aspects, and various modifications are possible without departing from the spirit of the present invention. Also, the embodiments and aspects described above may be combined.

[Modified example of lock mechanism]
The first locking mechanism 60A and the second locking mechanism 60B employed in the projection device 1 of the above embodiment are examples of locking mechanisms. The first locking mechanism 60A may have any structure as long as it can lock the second holding portion 40 at a desired position. Similarly, the second locking mechanism 60B may have any structure as long as it can lock the third holding portion 50 at a desired position. For example, it can be configured to lock using a pin and a pin hole.

[Modification of lens shift mechanism]
It is an example of the shift portion of the lens shift mechanism 80 employed in the projection apparatus 1 of the above embodiment. The shift section is not limited to shifting the entire projection lens, and may shift a part of the projection lens or shift the image display section 22 with respect to the projection lens 3 . Also, a known shift mechanism can be employed instead of the lens shift mechanism 80 configured as described above.

1 Projection device 2 Projection device main body 3 Projection lens 6 Main body operation unit 6A Power switch 6B MENU key 6C Cross key 6D ENTER key 6E BACK key 7 Air supply unit 8 Exhaust unit 9 Power supply connector 10 Video input terminal 11 Lock release operation unit 11A 1 lock release switch 11B 2nd lock release switch 12 horizontal leg 13 vertical leg 14 housing 14A housing front section 14B housing rear section 14C housing left side section 14D housing right side section 14E housing top section 14F Housing bottom 15 Recess 15A Inner wall 15a Recess 18 Lens cover 18A Lens cover front 18D Lens cover right side 18E Lens cover top 18F Lens cover bottom 20 Light source 20A Laser light source 20B Phosphor wheel 20C Mirror 20D Color Wheel 21 Illumination section 21A Rod integrator 21B Lens 21C Lens 21D Lens 21E Mirror 21F Mirror 22 Image display section 22A Total reflection prism 22B DMD
23 Body Posture Detector 30 Lens Barrel 31 First Holding Part 32 Fixed Frame 32A Flange 32B Straight Groove 32C First Support Roller 32D Claw Guide Groove 32E First Lock Groove 33 Cam Frame 33A First Cam Groove 33B Second Cam Groove 34 First lens holding frame 35 Second lens holding frame 35A First cam pin 35B Second cam pin 36 Third lens holding frame 37 Zoom gear frame 37A Gear portion 38 Zoom motor 38A Zoom drive gear 38B Bracket 40 Second holding portion 41 First Rotating frame 41A First guide groove 42 First mirror holding frame 43 Lens holding frame 43A Second guide groove 50 Third holding portion 51 Second rotating frame 51A Second support roller 51B Claw portion guide groove 51C Second lock groove portion 52 Second mirror holding frame 53 Helicoid frame 53A Female helicoid portion 54 Final lens holding frame 55 Focus lens holding frame 55A Male helicoid portion 55B Connecting pin 56 Focus gear frame 56A Gear portion 58 Focus motor 58A Focus drive gear 58B Bracket 60 Lock mechanism 60A 1 lock mechanism 60B second lock mechanism 61A first lock claw 61B second lock claw 62A first lock claw main body 62B second lock claw main body 63A arm portion 64A claw portion 64B claw portion 65A connecting portion 65B connecting portion 66A long hole 66B length Hole 67A Screw 67B Screw 68A First solenoid 68B Second solenoid 68a Plunger 68b Plunger 70A First rotation position detector 70B Second rotation position detector 71A First optical scale 71B Second optical scale 72A First reading sensor 72B 2 reading sensor 80 lens shift mechanism 81 base plate 81A base opening 81C first slide rail 82 first slide plate 82A first opening 82B first groove 82C second slide rail 83 second slide plate 83A second opening 83B second groove 83M Mount portion 84 First slide plate drive mechanism 85 Second slide plate drive mechanism 86 First shift motor 86A First drive shaft 87 First rotary shaft 87A First screw portion 88 First moving piece 88A First moving piece main body 88B 1 connecting portion 89 first worm gear 89A first worm 89B first worm wheel 90 second shift motor 90A second drive shaft 91 second rotary shaft 91A second screw portion 92 second moving piece 92A second moving piece main body 92B 2 connecting part 93 second worm gear 93A Second worm 93B Second worm wheel 98 Projected image 99A OSD image 99B OSD image 99C OSD image 99D OSD image 99E OSD image 99F OSD image G1 First optical system G11 First optical system first lens group G12 First optical system second 2nd lens group G13 1st optical system 3rd lens group G14 1st optical system 4th lens group G2 2nd optical system G21 2nd optical system 1st lens group G22 2nd optical system 2nd lens group G3 3rd optical system G31 Third optical system first lens group G32 Third optical system second lens group G33 Third optical system third lens group R1 First mirror R2 Second mirror S100 to S270 Control steps S300 to S350 related to the projection lens Projection Each step X Arrow Y Arrow Z1 First optical axis Z2 Second optical axis Z3 Third optical axis α First direction β Second direction θ1 First rotation axis θ2 Second rotation axis

Claims (6)

a housing;
a light source;
a control unit;
a projection lens attached to the housing, the projection lens having a holding section, a detection section for detecting a rotation state of the holding section, and an output optical system;
a moving mechanism for moving the projection lens with respect to the housing;
a reception unit that receives a user's operation of the moving mechanism ,
The holding portion includes a first holding portion through which light of a first optical axis emitted from the light source passes; a second holding portion through which light of a second optical axis obtained by bending the first optical axis passes; a third holder through which the light of the third optical axis obtained by bending the two optical axes passes;
the third holding portion rotates around the second optical axis,
The detection unit detects a rotation state of the third holding unit,
The control unit stores at least information on the movement position of the projection lens corresponding to the rotation state of the third holding unit,
The control unit moves the projection lens to the stored movement position based on at least the rotation state of the third holding unit ;
The projection device according to claim 1, wherein, when the movement position is changed by the operation, the control unit updates the stored movement position information based on the operation . The projection lens comprises a cover member,
The housing has a bottom surface facing a mounting surface on which the housing is mounted, and a first surface intersecting the bottom surface and serving as a side surface with respect to the bottom surface,
When the holding portion is rotated in a retracted state in which an extending direction of the optical axis of the output optical system faces the housing, the cover member has a second surface that intersects with a plane coinciding with the bottom surface. having a face,
2. The projection device according to claim 1 , wherein said control unit uses said moving mechanism to move said projection lens to a storage position where said first surface and said second surface are on the same plane. further equipped with a power supply,
3. The projection device according to claim 2 , wherein said control unit moves said projection lens to said storage position using said moving mechanism when said power source is turned off. further equipped with a power supply,
When the power supply is turned off and the rotating state of the holding unit is the retracted state, the control unit uses the moving mechanism to move the projection lens to the retracted position,
3. The apparatus according to claim 2 , wherein said control unit maintains the moving position of said projection lens by said moving mechanism when said power supply is turned off and said holding unit is in a rotational state other than said retracted state. projection device. 5. The control unit according to claim 3 , wherein when an operation to turn off the power is input, the control unit notifies information regarding a change in the rotational state of the projection lens before turning off the power. projection device. 6. The projection apparatus according to claim 5 , wherein said information is information relating to a change of the rotational state of said projection lens to a stored state in which said output optical system and said housing face each other.

Images