JP2009025446A - Projector and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector enabling a user to easily adjust a viewing angle of an optical image for displaying a display image on an entire projection surface even when a projector main body and an image output device relatively rotate. <P>SOLUTION: The projector 1 is equipped with a projector main body 2, a DVD player 3, and switches 61A and 61B for detecting the rotating positions of the projector main body 2 and the DVD player 3. The projector main body 2 is equipped with a control means 27, and the control means 27 is equipped with a viewing angle control part 272. The viewing angle control part 272 adjusts the viewing angle of the optical image projected from a projection lens 22 so that the viewing angle of the optical image may be smaller when a distance between the projector 1 and a screen Sc is long, and it may be larger when the distance between them is short in accordance with the detected result of the switches 61A and 61B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector and a control method.

Conventionally, a projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image, 2. Description of the Related Art There is known a projector that includes an image output device that outputs image information to a projector main body, and the projector main body and the image output device are configured to be relatively rotatable (see, for example, Patent Document 1).
In the projector described in Patent Document 1, a projection unit (projector body) is connected via a connection unit provided above a DVD (Digital Versatile Disk) playback unit (image output device), and is projected onto the DVD playback unit. The part is configured to be relatively rotatable. As a result, the projector user installs the projector with the operation section such as the DVD insertion slot in the DVD playback section facing his / her direction, and the projection direction of the optical image by the projector body is projected on the screen or the like. Can be used in the direction of the surface.

  By the way, when such a projector is used at a rotational position (hereinafter referred to as a first projection position) in which the operation unit in the image output apparatus and the projection optical apparatus in the projector main body are on the same side, the user operates In order to operate the image output device at the unit, the projector is installed behind the projector. Further, when the projector is used at a rotation position (hereinafter referred to as a second projection position) where the operation unit in the image output device and the projection optical device in the projector main body are opposite to each other, the user uses the operation unit. In order to operate the image output apparatus, a projector is installed in front of itself. That is, the distance between the projector and the projection surface becomes far when used at the first projection position and becomes closer when used at the second projection position.

JP 2005-99617 A

  However, if the distance between the projector and the projection surface changes, the size of the display image displayed on the projection surface changes when the angle of view of the optical image emitted from the projection optical device is the same. There is a problem that it takes time and effort to adjust the angle of view of the optical image for displaying the display image on the entire projection surface.

  An object of the present invention is to provide a projector and a control capable of adjusting an angle of view of an optical image for allowing a user to easily display a display image on the entire projection surface even when the projector main body and the image output apparatus are relatively rotated. It is to provide a method.

  A projector according to the present invention includes a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. A projector comprising: a main body; an image output device that outputs the image information to the projector main body; and a connection mechanism that connects the projector main body and the image output device in a relatively rotatable manner, the projector main body and the image output A rotation position detection means for detecting a rotation position of the apparatus, an angle of view adjustment means for adjusting an angle of view of the optical image emitted from the projection optical apparatus, and a control means for controlling the projector, The control means controls the angle of view to cause the angle of view adjustment of the optical image to be adjusted according to the detection result by the rotation position detection means. Characterized in that it comprises a part.

Here, the angle-of-view adjusting means can be configured to adjust the angle of view of the optical image by so-called optical zoom, for example, by moving the position of the zoom lens that constitutes the projection optical apparatus. In this case, the light modulated in the entire image forming area of the light modulation device is an optical image.
The angle of view adjusting means can be configured to adjust the angle of view of the optical image by so-called electronic zoom, for example, by enlarging or reducing the image information and inputting it to the light modulation device. When the image information is reduced, black image information for displaying a black image is inserted around the reduced image information. In this case, the light modulated in the image forming region of the light modulation device excluding the region that modulates light according to the black image information is used as an optical image.

  According to such a configuration, the projector includes the angle-of-view control unit that adjusts the angle of view of the optical image according to the detection result by the rotation position detecting unit. For example, the angle-of-view control unit includes the projector and the projection surface. The angle of view of the optical image can be reduced when the distance between them is long, and the angle of view can be adjusted by the angle of view adjustment means so that the angle of view of the optical image becomes large when the distance between them is close. Therefore, the user can save the trouble of adjusting the angle of view of the optical image, and an optical image for easily displaying a display image on the entire projection surface even when the projector main body and the image output device rotate relative to each other. The angle of view can be adjusted.

  In the present invention, the image output device is provided with an operation unit for performing an operation on the image output device, and the rotation position detection means is configured to detect the projection optical at the rotation positions of the projector body and the image output device. It is preferable to detect a first projection position where the apparatus and the operation unit are on the same side, and a second projection position where the projection optical apparatus and the operation unit are on the opposite side.

Here, as described above, the distance between the projector and the projection surface becomes far when used at the first projection position and becomes closer when used at the second projection position.
According to such a configuration, the rotation position detection unit detects the first projection position and the second projection position. For example, the angle-of-view adjustment unit has the projector main body and the image output device at the first projection position. The angle of view of the optical image can be adjusted by the angle-of-view adjusting means so that the angle of view is reduced when detected, and the angle of view of the optical image is increased when detected as being at the second projection position. Therefore, even when the projector main body and the image output apparatus are relatively rotated, the user can easily adjust the angle of view of the optical image for displaying the display image on the entire projection surface.

  In the present invention, the angle-of-view control unit is minimized when the rotation position detection unit detects that the projector main body and the image output device are at the first projection position, and detects that they are at the second projection position. It is preferable that the angle of view of the optical image is adjusted by the angle-of-view adjusting means so that the angle becomes maximum when the angle is set.

According to such a configuration, since the angle of view of the optical image is minimized when it is detected that the projector main body and the image output device are at the first projection position, the display image displayed on the projection surface is the most Small display image. Therefore, the user can easily display the display image on the entire projection surface by slightly increasing the angle of view of the optical image while viewing the display image.
In addition, since the angle of view of the optical image is maximized when it is detected that the projector main body and the image output apparatus are at the second projection position, the display image displayed on the projection surface is the largest display image. Therefore, the user can easily display the display image on the entire projection surface only by slightly reducing the angle of view of the optical image while viewing the display image.
Therefore, even when the projector main body and the image output apparatus are relatively rotated, the user can easily adjust the angle of view of the optical image for displaying the display image on the entire projection surface.

In the present invention, the projection optical device includes a zoom lens that adjusts an angle of view of the optical image by moving along an optical axis direction of the projection optical device, and the angle of view adjustment unit includes the zoom lens. It is preferable to adjust the angle of view of the optical image by moving.
According to such a configuration, the entire image forming area of the light modulation device can be effectively used as compared with the case where the angle of view of the optical image is adjusted by electronic zoom. That is, according to the electronic zoom, the input image information is enlarged or reduced to change the image size of the optical image formation region in the entire image formation region of the light modulation device, thereby adjusting the angle of view of the optical image. The display image displayed on the projection surface has a low resolution. However, according to the present invention, since the angle of view of the optical image is adjusted by the optical zoom, the optical image can be formed in the entire image forming area of the light modulation device, and the display image displayed on the projection surface The resolution can be increased.

A projector control method according to the present invention includes: a light modulation device that modulates light emitted from a light source according to input image information to form an optical image; and a projection optical device that magnifies and projects the formed optical image. A projector main body, an image output device that outputs the image information to the projector main body, and a connection mechanism that connects the projector main body and the image output device in a relatively rotatable manner, the projector main body and An angle-of-view control step for adjusting the angle of view of the optical image is executed according to a detection result by a rotation position detecting means for detecting the rotation position of the image output device.
According to such a configuration, it is possible to receive the same operational effects as those of the projector described above.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Schematic configuration of projector]
FIG. 1 is a perspective view of the projector 1 viewed from the front side, and FIG. 2 is a perspective view of the projector 1 viewed from the rear side. FIG. 3 is an exploded perspective view of the projector 1 as viewed from the front side. In FIG. 1 to FIG. 3, for convenience of explanation, the direction from the rear side to the front side of the projector 1 is the X axis, and two axes orthogonal to the X axis are the Y axis (horizontal axis) and the Z axis (vertical), respectively. Axis). The same applies to the following drawings.

  As shown in FIGS. 1 to 3, the projector 1 modulates the light emitted from the light source according to input image information to form an optical image, and enlarges and projects the formed optical image. A DVD player 3 that outputs image information to the projector body 2, a connection mechanism 4 that rotatably connects the projector body 2 and the DVD player 3, and a rotation restriction mechanism 5 that restricts the rotation of the projector body 2 and the DVD player 3. And a rotation position detecting means 6 (see FIG. 4) for detecting the rotation positions of the projector main body 2 and the DVD player 3. The internal configuration of the rotational position detecting means 6 and the projector 1 will be described in detail later.

  As shown in FIGS. 1 and 2, the projector main body 2 is placed on the upper side (+ Z-axis direction side) of the DVD player 3 and is formed in a substantially rectangular parallelepiped shape. The projection lens 22 exposed on the front surface (surface on the + X-axis direction side) of 21 and an operation panel provided on the rear side (−X-axis direction side) of the upper surface (surface on the + Z-axis direction side) of the upper housing 21 23. The operation panel 23 is used to perform operations such as starting and adjusting the projector 1 and operations such as playing and stopping the DVD player 3. When the DVD operation panel 23 is operated, the DVD player 3 performs reproduction / stopping of image information and audio information recorded on a recording medium such as a DVD inserted into the DVD player 3.

  A DVD player 3 as an image output device reproduces a recording medium such as a DVD and outputs image information recorded on the recording medium to the projector body 2 via an image cable (not shown). As shown in FIGS. 1 and 2, the DVD player 3 is disposed on the lower side (−Z-axis direction side) of the projector main body 2 and has a lower casing 31 formed in a substantially rectangular parallelepiped shape, and a lower casing. A DVD insertion / extraction port 32 provided at a substantially central portion of the front surface of the body 31, a DVD operation display unit 33 provided below the DVD insertion / extraction port 32, and a rear surface of the lower housing 31 (on the −X axis direction side). The interface cover 34 and the inlet connector 35 provided on the surface) are provided.

The DVD insertion / extraction slot 32 as an operation unit is a slot-in type insertion / extraction slot into which a recording medium such as a DVD is inserted / extracted, and the DVD player 3 has image information recorded on the recording medium inserted into the DVD insertion / extraction slot 32. Or play audio information. A discharge switch 32A for discharging the recording medium is attached to the side of the DVD insertion / extraction opening 32.
The DVD operation display unit 33 is a part for displaying the state of playback / stop of the DVD player 3, and the user confirms the state of playback / stop of the recording medium by looking at the DVD operation display unit 33. be able to.

Although not shown in the figure, the interface cover 34 is provided with various interface connectors such as an image input terminal for inputting image information from the outside to the projector 1. Protect the connector. By opening the interface cover 34, various interface connectors can be used. The interface cover 34 may be omitted.
The inlet connector 35 is a connector for connecting an AC power cable from the outside, and is exposed without being covered by the interface cover 34.

As shown in FIG. 3, the coupling mechanism 4 is fixed to the bottom plate 24 of the projector main body 2, and is fixed to the plate-like member 41 and is rotatable to the top plate 36 of the DVD player 3. A rotating member 42 to be attached and a plurality of divided annular members 43 for attaching the rotating member 42 to the top plate 36 are provided.
In FIG. 3, the illustration of the projection lens 22 (see FIG. 1) exposed from the upper housing 21 and the DVD insertion / extraction port 32 (see FIG. 1) provided in the lower housing 31 is omitted. is doing.

The plate-like member 41 is a plate-like member formed in a substantially cross shape in plan view, and has four end portions that extend in four directions substantially orthogonally. A rotating member 42 is fixed to a substantially central position of the plate-like member 41 with a plurality of screws.
The rotating member 42 includes a substantially cylindrical rotating member main body 421 and an extending portion 422 provided at one end on the top plate 36 side of the rotating member main body 421 so as to extend outward substantially orthogonal to the axial direction. .
Here, the top plate 36 is formed with a substantially disk-shaped pedestal 361 projecting upward by press molding or the like at a substantially central position, and a substantially circular opening 361A is formed at a substantially central position of the pedestal 361. Is formed. The rotating member 42 is inserted into the opening 361A from above while being fixed to the plate-like member 41.

The divided annular member 43 is a member obtained by dividing a flat annular member having an inner diameter substantially the same as the outer diameter of the rotating member main body 421 into two parts, and the ceiling member in a state where the rotating member 42 is inserted into the opening 361A. The plate 36 and the extending portion 422 are formed to have substantially the same thickness.
The split annular member 43 is inserted so as to sandwich the rotating member main body 421 in the gap between the top plate 36 and the extending portion 422, and is fixed to the top plate 36 with a plurality of screws. The top plate 36 is fixed to the lower housing 31 with a plurality of screws.

The rotation restricting mechanism 5 is bent so as to protrude upward at two positions on the right side (+ Y axis direction side) and the left side (−Y axis direction side) of the periphery of the base 361. Stopper portions 51A and 51B, and click springs 52A and 52B attached at two positions on the front side (+ X axis direction side) and the back side (−X axis direction side) are provided.
The stopper portions 51 </ b> A and 51 </ b> B abut against the plate-like member 41, thereby restricting the rotation of the plate-like member 41 in a predetermined direction. Specifically, the stopper 51A is formed on the plate-like member 41 in a state where the projection lens 22 in the projector main body 2 and the DVD insertion / extraction port 32 in the DVD player 3 are on the same side, that is, in the state of FIGS. It abuts and restricts the rotation of the plate-like member 41 in the clockwise direction (arrow A in FIG. 3) when viewed from above. The stopper 51B abuts on the plate-like member 41 in a state where the projection lens 22 and the DVD insertion / extraction opening 32 are on the opposite side, and the plate-like member 41 in the counterclockwise direction (arrow B in FIG. 3). Regulate the rotation of

The click springs 52 </ b> A and 52 </ b> B provide a resistance against rotation in a direction opposite to the rotation in a predetermined direction regulated by the stopper portions 51 </ b> A and 51 </ b> B when the plate-like member 41 contacts the stopper portions 51 </ b> A and 51 </ b> B. Append to
Therefore, in order to rotate the plate-like member 41 in the direction away from the stopper portions 51A and 51B, it is necessary to apply a force larger than the drag force applied by the click springs 52A and 52B. That is, the plate-like member 41 is stopped in a state where it abuts on the stopper portions 51A and 51B by the click springs 52A and 52B. In the present embodiment, the stationary position where the plate-like member 41 is in contact with the stopper portion 51A is defined as the first projection position (see FIGS. 1 to 3), and the stationary position where the plate-like member 41 is in contact with the stopper portion 51B is used. The second projection position is assumed.

[Configuration of rotational position detecting means]
FIG. 4 is a view of the top plate 36 as viewed from below when the projector 1 is stationary at the first projection position.
As shown in FIG. 4, the rotational position detection means 6 is mounted on a pedestal 361 and switches 61A and 61B having a substantially rectangular shape in plan view, which are attached to substantially the center position of each divided annular member 43, and the switches 61A and 61B. And a switch substrate 62 for detecting conduction and non-conduction.

  The switches 61A and 61B are provided along the direction of relative rotation of the rotating member 42 and the top plate 36, that is, the projector main body 2 and the DVD player 3, and detect the rotational positions of the projector main body 2 and the DVD player 3. It is. Shaft portions 611 are provided at the corners of the switches 61A and 61B so as to protrude outward on substantially diagonal lines of the switches 61A and 61B. The shaft portion 611 is rotatable around the corners of the switches 61A and 61B, and is urged toward the rotating member 42 around the corners of the switches 61A and 61B. It should be noted that the switches 61A and 61B do not conduct when the load is not applied to the shaft portion 611 (the state of the switch 61B in FIG. 4). The switches 61A and 61B conduct when a load is applied to the shaft portion 611 and the shaft portion 611 is pushed so as to be substantially parallel to the side surface of the switches 61A and 61B on the rotating member 42 side (switch 61A in FIG. 4). State).

  The extending portion 422 of the rotating member 42 is formed with a protruding portion 422A that protrudes toward the click spring 52A when the projector 1 is stationary at the first projection position. The protrusion 422A applies a load to the shaft portion 611 of the switch 61A when the projector 1 is stationary at the first projection position, and switches when the projector 1 is stationary at the second projection position. It is formed at a position where a load is applied to the shaft portion 611 of 61B.

That is, when the projector 1 is stationary at the first projection position, the switch 61A is in a conductive state and the switch 61B is in a non-conductive state. On the other hand, when the projector 1 is stationary at the second projection position, the switch 61A is in a non-conductive state, and the switch 61B is in a conductive state. Therefore, the switches 61A and 61B detect whether the projector main body 2 and the DVD player 3 are at the first projection position or the second projection position, respectively.
The switch board 62 is a circuit board for detecting conduction (ON state) and non-conduction (OFF state) of the switches 61A and 61B, and is controlled by the control means 27 described later. Then, the switch substrate 62 outputs each detected ON or OFF state to the control means 27.

[Internal configuration of projector]
FIG. 5 is a block diagram showing the internal configuration of the projector 1.
As shown in FIG. 5, the projector main body 2 is roughly configured by an image projection unit 25, an image processing unit 26, and a control unit 27.
The image projection unit 25 modulates light emitted from the light source according to image information to form an optical image, and enlarges and projects the formed optical image onto a projection surface such as a screen Sc. The image projection unit 25 includes a light source device 251, a liquid crystal panel 252, and the projection lens 22 described above.

The light source device 251 includes a light source lamp 253 configured by a high-pressure discharge lamp, and the light source lamp 253 emits light toward the liquid crystal panel 252. The light source device 251 may include various self-light emitting elements such as a light emitting diode, a laser diode, and an organic EL element instead of the light source lamp 253.
A liquid crystal panel 252 as a light modulation device is a transmissive liquid crystal panel, and changes the arrangement of liquid crystal molecules sealed in a liquid crystal cell (not shown) based on image information, and emits light emitted from a light source lamp 253. The optical image is modulated according to image data by being transmitted or blocked, and an optical image is formed. The optical image is emitted to the projection lens 22.

  The projection lens 22 as a projection optical device is configured as a combined lens in which a plurality of lenses including a zoom lens 221 are housed in a cylindrical lens barrel (not shown), and an optical image emitted from the liquid crystal panel 252 is screened. The lens is enlarged and projected toward Sc, and includes a lens driving unit that drives the zoom lens 221. A display image based on the emitted optical image is displayed on the screen Sc.

The zoom lens 221 is supported by a zoom ring (not shown), and the zoom ring is rotated about the optical axis of the zoom lens 221 to move in the optical axis direction within the lens barrel. Thereby, the zoom lens 221 adjusts the angle of view of the optical image emitted from the projection lens 22. Specifically, by moving the zoom lens 221 to the liquid crystal panel 252 side, the angle of view of the optical image can be adjusted, that is, the display image can be adjusted, and the screen image can be moved to the screen Sc side. As a result, the angle of view of the optical image can be reduced, that is, the display image can be adjusted to be small.
The lens driving unit 222 as the angle-of-view adjustment unit is configured by, for example, a pulse motor, and rotates the zoom ring of the zoom lens 221 under the control of the control unit 27, thereby moving the zoom lens 221 in the optical axis direction. The relative position of the zoom lens 221 in the lens barrel is changed.

  Although not shown, the projector main body 2 includes a color light separation optical device that separates light emitted from the light source lamp 253 into three colors of RGB (Red Green Blue). The liquid crystal panel 252 described above is provided corresponding to the three colors RGB separated by the color light separation optical device. Further, the projector main body 2 includes a combining optical device that combines the optical images of the three colors to generate an optical image representing a color image.

The image processing unit 26 performs image processing on image information stored in a recording medium such as a DVD, and outputs the processed image information to the liquid crystal panel 252.
As the image processing, for example, an electronic zoom for enlarging or reducing an image displayed on the screen Sc by enlarging or reducing image information stored in a recording medium such as a DVD and inputting the information to the liquid crystal panel 252; For example, trapezoidal correction for correcting trapezoidal distortion caused by the positional relationship between the projector 1 and the screen Sc can be given.

The control unit 27 includes, for example, a CPU (Central Processing Unit) and the like, and controls the projector 1. The control unit 27 includes a rotational position determination unit 271 and an angle of view control unit 272.
The rotational position determination unit 271 determines whether the projector body 2 and the DVD player 3 are at the first projection position or the second projection position based on the ON or OFF state of the switches 61A and 61B output from the switch substrate 62. Determine whether or not.

The angle-of-view control unit 272 determines the angle of view of the optical image emitted from the projection lens 22 based on the determination result by the rotation position determination unit 271, that is, according to the detection result by the rotation position detection unit 6. To adjust.
Specifically, the angle of view control unit 272 changes the relative position of the zoom lens 221 in the lens barrel by outputting a control signal to the lens driving unit 222. Thereby, the zoom lens 221 moves in the lens barrel in the optical axis direction, and the angle of view of the optical image emitted from the projection lens 22 is adjusted.

[Projector control processing]
FIG. 6 is a flowchart showing the control process of the projector 1.
When the power button is pressed, the projector 1 enlarges and projects the optical image formed according to the image information toward the screen Sc and executes the following control processing.
First, the rotational position determination unit 271 determines the rotational positions of the projector main body 2 and the DVD player 3 by monitoring the ON / OFF states of the switches 61A and 61B output from the switch substrate 62 (step S1). : Rotational position determination step). Specifically, the rotational position determination unit 271 determines that the projector 1 is stationary at the first projection position when the switch 61A is in the ON state and the switch 61B is in the OFF state. The rotational position determination unit 271 determines that the projector 1 is stationary at the second projection position when the switch 61A is in the OFF state and the switch 61B is in the ON state.

When it is determined in the rotational position determination step S1 that the projector 1 is stationary at the first projection position or the second projection position, the angle-of-view control unit 272 is based on the determination result by the rotational position determination unit 271. Then, the angle of view of the optical image emitted from the projection lens 22 is adjusted by the lens driving unit 222 (step S2: angle of view control step).
Specifically, when the rotation position determination step S1 determines that the projector 1 is stationary at the first projection position, the angle-of-view control unit 272 outputs a control signal to the lens driving unit 222. As a result, the relative position of the zoom lens 221 in the lens barrel is moved toward the screen Sc, and is adjusted so that the angle of view of the optical image is minimized (tele end). On the other hand, when the rotation position determination step S1 determines that the projector 1 is stationary at the second projection position, the angle-of-view control unit 272 outputs a control signal to the lens driving unit 222. Thus, the relative position of the zoom lens 221 in the lens barrel is moved to the liquid crystal panel 252 side and adjusted so that the angle of view of the optical image is maximized (wide end).
By executing the above steps S1 to S2, the control process of the projector 1 is executed.

Here, FIG. 7 shows the positional relationship of the screen Sc, the projection lens 22, the DVD insertion / extraction port 32, and the user of the projector 1 when the projector 1 is stationary at the first projection position and the second projection position. It is a schematic diagram shown. In FIG. 7, the user of the projector 1 is indicated by a circle.
FIG. 7A is a diagram showing a state in which the projector 1 is stationary at the first projection position. In this state, the projection lens 22 and the DVD insertion / extraction port 32 are on the same side. FIG. 7B is a diagram showing a state in which the projector 1 is stationary at the second projection position. In this state, the projection lens 22 and the DVD insertion / extraction port 32 are on the opposite side.

  Here, in a state where the projector 1 is stationary at the first projection position, the DVD insertion / extraction port 32 is on the same side as the projection lens 22, so that the user can connect the projector 1 between the projector 1 and the screen Sc. Is considered to be used (FIG. 7A). Further, when the projector 1 is stationary at the second projection position, the DVD insertion / extraction port 32 is on the side opposite to the projection lens 22, so that the user holds the projector 1 between the projector 1 and the screen Sc. It is considered to be used (FIG. 7B).

Therefore, the distance between the projector 1 and the screen Sc is long when the projector 1 is stationary at the first projection position, and is short when the projector 1 is stationary at the second projection position.
Then, when the projector 1 is stationary at the first projection position, the angle-of-view control unit 272 adjusts the angle of view α of the optical image to be minimum (FIG. 7A). Further, when the projector 1 is stationary at the second projection position, the view angle control unit 272 adjusts the view angle α of the optical image to be maximized (FIG. 7B).

The projector 1 according to the present embodiment has the following effects.
(1) Since the projector 1 includes the angle-of-view control unit 272 that adjusts the angle of view of the optical image according to the detection result by the rotation position detection unit 6 that detects the first projection position and the second projection position, the user Can save the trouble of adjusting the angle of view of the optical image, and the angle of view of the optical image for easily displaying the display image on the entire projection surface even when the projector body 2 and the DVD player 3 are relatively rotated. You can make adjustments.

(2) Since the angle of view α of the optical image is minimized when it is detected that the projector body 2 and the DVD player 3 are at the first projection position, the display image displayed on the screen Sc is the smallest display image. It becomes. Therefore, the user can easily display the display image on the entire projection surface by slightly increasing the angle of view α of the optical image while viewing the display image. Further, since the angle of view α of the optical image is maximized when it is detected that the projector main body 2 and the DVD player are at the second projection position, the display image displayed on the screen Sc is the largest display image. . Therefore, the user can easily display the display image on the entire projection surface only by slightly reducing the angle of view α of the optical image while viewing the display image.

(3) The projection lens 22 includes a zoom lens 221 that adjusts the angle of view of the optical image by moving in the lens barrel along the optical axis direction, and the lens driving unit 222 moves the zoom lens 221. Thus, since the angle of view of the optical image is adjusted, the entire image forming area of the light modulation device can be effectively used as compared with the case where the angle of view of the optical image is adjusted by electronic zoom, and the screen Sc The resolution of the display image displayed above can be increased.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the two switches 61A and 61B detect the first projection position and the second projection position, but may be provided at positions that detect other rotational positions. In short, what is necessary is just to provide in the position which detects the rotation position where the distance between a projector and a projection surface changes.
In the embodiment, the rotational position detecting means is constituted by the two switches 61A and 61B provided along the direction of relative rotation of the projector main body 2 and the DVD player 3, but two or more switches may be used. Good. Further, instead of the switches 61A and 61B, the rotational position may be detected using, for example, an optical sensor or a rotary encoder. In short, the rotational position detecting means may be any means that detects the rotational positions of the projector main body and the image output means.

In the embodiment, when the projector 1 is stationary at the first projection position, the angle of view of the optical image is adjusted to be minimum, and when the projector 1 is stationary at the second projection position, the image of the optical image is adjusted. Although the angle is adjusted to be maximum, it may be adjusted to have a field angle other than this. In short, even when the projector main body and the image output device are rotated, it is sufficient that the user can easily adjust the angle of view of the optical image for displaying the display image on the entire projection surface.
In the above embodiment, the angle of view adjustment unit is configured by the lens driving unit 222 that moves the position of the zoom lens 221, that is, adjusts the angle of view of the optical image by so-called optical zoom. May be configured by the image processing means 26 and the angle of view of the optical image may be adjusted by electronic zoom. In short, the angle-of-view adjusting means may be any means that adjusts the angle of view of the optical image emitted from the projection optical device.

In the above embodiment, the transmissive liquid crystal panel 252 is employed. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed, or a digital micromirror device (DMD) may be employed. . DMD is a trademark of Texas Instruments Incorporated.
In each of the above embodiments, the DVD player 3 is exemplified as the image output device. However, for example, a video player may be used as long as it outputs image information to the projector main body.

  The present invention can be used for a projector, and in particular, can be suitably used for a projector including a projector main body and an image output device.

The perspective view which looked at the projector in a 1st embodiment from the front side. The perspective view which looked at the projector in the said embodiment from the back side. The disassembled perspective view which looked at the projector in the said embodiment from the front side. The figure which looked at the top plate from the lower side in the state where the projector in the above-mentioned embodiment has stopped at the 1st projection position. The block diagram which shows the internal structure of the projector in the said embodiment. 7 is a flowchart showing projector control processing in the embodiment. The schematic diagram which shows the positional relationship of the screen, the projection lens, DVD insertion slot, and the projector user in the state which the projector in the said embodiment is stationary in the 1st projection position and the 2nd projection position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Projector main body, 3 ... DVD player (image output device), 4 ... Connection mechanism, 6 ... Rotation position detection means, 22 ... Projection lens (projection optical device), 27 ... Control means, 32 ... DVD insertion / extraction Mouth, 221... Zoom lens, 222... Lens driving unit, 252... Liquid crystal panel (light modulation device), 272.

Claims (5)

A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A projector comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
Rotational position detecting means for detecting rotational positions of the projector body and the image output device;
An angle-of-view adjusting means for adjusting an angle of view of the optical image emitted from the projection optical device;
Control means for controlling the projector,
The control means includes
A projector comprising: an angle-of-view control unit that causes the angle-of-view adjusting means to adjust the angle of view of the optical image according to a detection result by the rotation position detecting means. The projector according to claim 1, wherein
The image output device is provided with an operation unit for operating the image output device.
The rotation position detecting means includes a first projection position where the projection optical device and the operation unit are on the same side, and the projection optical device and the operation unit on the opposite side at the rotation positions of the projector main body and the image output device. And a second projection position to be detected. The projector according to claim 2,
The angle of view control unit
The rotational position detecting means is minimized when it is detected that the projector main body and the image output device are at the first projection position, and is maximized when it is detected that they are at the second projection position. A projector characterized in that an angle of view of an optical image is adjusted by the angle of view adjusting means. The projector according to any one of claims 1 to 3,
The projection optical device includes a zoom lens that adjusts the angle of view of the optical image by moving along the optical axis direction of the projection optical device.
The angle of view adjusting means includes
A projector, wherein the angle of view of the optical image is adjusted by moving the zoom lens. A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A projector control method comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
An angle-of-view control step of adjusting an angle of view of the optical image according to a detection result by a rotation position detecting means for detecting a rotation position of the projector main body and the image output device. Control method.

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