JP2005345679A - Image projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image projection device capable of projecting images onto a screen from a projector, without automatically rotating the projector relative to the screen. <P>SOLUTION: The image projection device 10 mounted on a vehicle includes the projector 20 for projecting images; the screen 30 integrated with the projector 20 so as to be changeable at a position relative to the projector 20, and used for projecting images on the screen; an open/close-detecting part for detecting the position of the screen 30 relative to the projector 20; and an image adjustment part for adjusting the images for the screen 30, according to the position of the screen 30 detected by the open/close-detecting part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image projection apparatus that projects an image from a projector onto a screen.

As a conventional image projection apparatus, a projector that recognizes the position of the screen by a signal from a sensor provided on the screen and then automatically rotates the projector in an appropriate direction based on the recognized position of the screen is known. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-301200 (page 5, FIG. 8)

  However, in the conventional image projection apparatus, since the projector and the screen are installed separately, there is a problem that the projector has to be automatically rotated with respect to the screen.

  The present invention has been made to solve the conventional problems, and provides an image projection apparatus capable of projecting an image from a projector onto a screen without automatically rotating the projector with respect to the screen. Objective.

  An image projection apparatus according to the present invention includes: a projector that projects an image; an integrated screen that is integrally formed with the projector so that the position of the projector can be changed; and the position of the integrated screen with respect to the projector. An integrated screen position detecting means for detecting, and an image adjusting means for adjusting the image for the integrated screen according to the position of the integrated screen detected by the integrated screen position detecting means. .

  With this configuration, since the projector and the integral screen are integral with the image projection apparatus of the present invention, an image can be projected from the projector onto the integral screen without automatically rotating the projector with respect to the integral screen. .

  In the image projection apparatus of the present invention, the image adjusting unit adjusts the image for the integrated screen only when the position of the integrated screen detected by the integrated screen position detecting unit is a predetermined position. It has a configuration.

  With this configuration, when the position of the integrated screen with respect to the projector is a position other than a predetermined position, the image projection apparatus of the present invention can manually adjust the image for the integrated screen, for example.

  The image projection apparatus according to the present invention includes a power control unit that controls power supply to the projector according to the position of the integrated screen detected by the integrated screen position detection unit. .

  With this configuration, the image projection apparatus according to the present invention can improve the user-friendliness because power is supplied to the projector only by changing the position of the integrated screen with respect to the projector.

  The image projection apparatus according to the present invention includes an operation unit operated by a user, and the image adjustment unit adjusts the image for the integrated screen in accordance with a user operation on the operation unit. have.

  With this configuration, the image projection apparatus of the present invention adjusts the image for the integrated screen in accordance with the user's operation on the operation means, so that the user-friendliness can be improved.

  According to another aspect of the invention, there is provided an image projection apparatus including: an operation unit that is operated by a user; and a power control unit that controls supply of power to the projector according to a user's operation to the operation unit. have.

  With this configuration, the image projection apparatus of the present invention controls the power supply to the projector according to the operation of the user to the operation means, so that the user-friendliness can be improved.

  The image projection apparatus according to the present invention further includes an operation unit operated by a user, and an integrated screen position changing unit that changes a position of the integrated screen with respect to the projector in accordance with a user operation on the operation unit. It has the composition provided.

  With this configuration, the image projection apparatus according to the present invention changes the position of the integrated screen with respect to the projector in accordance with the user's operation on the operation means, so that the user-friendliness can be improved.

  Moreover, the image projection apparatus of the present invention includes a separate screen that is formed separately from the projector and projects the image, and the separate screen is located at a position other than the position at which the image is projected by the projector. The projector is arranged at a position where the image is projected by the projector when there is the integrated screen.

  With this configuration, the image projection apparatus of the present invention has a mode in which the user views an image projected on the integrated screen by one projector, and a mode in which the user views the image projected on the separate screen. It becomes possible to use in two ways.

  In the image projection apparatus of the present invention, the image adjusting unit adjusts the image for the separate screen according to the position of the integrated screen detected by the integrated screen position detecting unit. Yes.

  With this configuration, the image projection apparatus according to the present invention automatically adjusts an image for a separate screen according to the position of the integrated screen with respect to the projector, thus eliminating the user's trouble of adjusting the image for the separate screen. Can do.

  The image projection apparatus according to the present invention further includes a separate screen position detection unit that detects a position of the separate screen with respect to the projector, and the image adjustment unit is the separate screen position detected by the separate screen position detection unit. The image is adjusted for the separate screen according to the position of the body screen.

  With this configuration, the image projection apparatus according to the present invention automatically adjusts the image for the separate screen according to the position of the separate screen with respect to the projector, thereby saving the user's trouble of adjusting the image for the separate screen. be able to.

  In the image projection apparatus of the present invention, the image adjusting unit adjusts the image for the separate screen only when the position of the integrated screen detected by the integrated screen position detecting unit is a predetermined position. It has the composition to do.

  With this configuration, when the position of the integrated screen with respect to the projector is a position other than the predetermined position, the image projection apparatus of the present invention can manually adjust the image for a separate screen, for example.

  In the image projection apparatus according to the present invention, the image adjustment unit may use the image for the separate screen only when the position of the separate screen detected by the separate screen position detection unit is a predetermined position. It has the structure adjusted to.

  With this configuration, when the position of the separate screen with respect to the projector is a position other than the predetermined position, the image projection apparatus of the present invention can manually adjust the image for the separate screen, for example.

  The image projection apparatus according to the present invention includes a power control unit that controls power supply to the projector according to the position of the separate screen detected by the separate screen position detection unit. ing.

  With this configuration, the image projection apparatus of the present invention can improve the convenience of the user because power is supplied to the projector only by changing the position of the separate screen relative to the projector.

  The image projection apparatus according to the present invention includes an operation unit operated by a user, and a separate screen position changing unit that changes a position of the separate screen relative to the projector in accordance with a user operation on the operation unit. It has the composition provided with.

  With this configuration, the image projection apparatus of the present invention changes the position of the separate screen with respect to the projector in accordance with the user's operation on the operation means, so that the user-friendliness can be improved.

  Further, the image projection apparatus of the present invention includes a reflecting member that reflects the image projected by the projector toward the separate screen, and the integrated screen is a rear projection type screen, and the separate screen Has a configuration of a reflective screen.

  With this configuration, the image projection apparatus of the present invention can reduce the space required for viewing as compared to the case where both the integral screen and the separate screen are rear projection types.

  The image projection apparatus according to the present invention further includes a reflection member position detection unit that detects a position of the reflection member with respect to the projector, and the image adjustment unit is a position of the reflection member detected by the reflection member position detection unit. Accordingly, the image is adjusted for the separate screen.

  With this configuration, the image projection apparatus according to the present invention automatically adjusts the image for the separate screen according to the position of the reflecting member with respect to the projector, thereby saving the user's trouble of adjusting the image for the separate screen. Can do.

  In addition, the image projection apparatus of the present invention includes a reflection member position changing unit that changes the position of the reflection member with respect to the projector according to the position of the separate screen with respect to the projector.

  With this configuration, the image projection apparatus of the present invention changes the position of the reflecting member with respect to the projector in accordance with the position of the separate screen with respect to the projector, so that user convenience can be improved.

  The vehicle of the present invention has a configuration in which an image projection device is provided on at least one of the internal ceiling and the back of the internal seat.

  With this configuration, the vehicle of the present invention can allow the user to use the image projection device for viewing inside the vehicle.

  In addition, the vehicle of the present invention includes an image projection device on an internal ceiling in a state where the projector projects the image backward, and the integrated screen and the separate screen are rear projection screens. It has a configuration.

  With this configuration, the vehicle according to the present invention can be switched between the viewing inside the vehicle and the viewing outside the vehicle by a single projector, and the user can use the image projection apparatus.

  The vehicle of the present invention has a configuration in which an image projection device is provided on an internal ceiling in a state in which the projector projects the image in the rear direction.

  With this configuration, the vehicle according to the present invention allows the user to use the image projection apparatus by switching between the viewing at the front seat inside the vehicle and the viewing at the rear seat inside the vehicle by a single projector. Can do.

  The present invention can provide an image projection apparatus capable of projecting an image from a projector onto a screen without automatically rotating the projector with respect to the screen.

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

(First embodiment)
First, the configuration of the image projection apparatus according to the first embodiment will be described.

  As shown in FIGS. 1 to 3, the in-vehicle video projection apparatus 10 as the image projection apparatus according to the present embodiment can change the projector 20 having a projection unit 21 that projects an image, and the position relative to the projector 20. Are provided with a rear projection type screen 30 as an integral screen formed integrally with the projector 20 and onto which an image is projected, and an open / close detection unit 40 as an integral screen position detecting means for detecting opening / closing of the screen 30 with respect to the projector 20. The projector 20 is installed on the ceiling 191 in the vehicle 190 with the direction in which the image is projected behind the vehicle 190.

  The projector 20 has a fixing portion 22 in which a hole 22a is formed and becomes the center of rotation in the direction indicated by the arrow 30a of the screen 30. As shown in FIG. 4, the projector 20 includes a light source unit 23 that generates light for an image projected by the projection unit 21, and a video generation unit that generates an image signal of the video projected by the projection unit 21. 24, an illumination optical system unit 25 for efficiently using light emitted from the light source unit 23, a projection image forming unit 26 for forming an image projected by the projection unit 21, a light source unit 23, and a video generation unit 24. And a power input unit 27 that supplies power to the projection image forming unit 26 and a focal length adjustment unit 28 as an image adjustment unit that adjusts the projected image to form an image on the screen 30. Here, the projection unit 21 includes a plurality of lenses. The light source unit 23 includes a lamp such as a metal halide lamp or a high-pressure mercury lamp, a lighting circuit for lighting the lamp, a reflecting mirror that projects light from the lamp forward, and the like. Further, the illumination optical system unit 25 is constituted by, for example, a dichroic mirror and an optical integrator optical system. Further, the projection image forming unit 26 forms an image projected from the projection unit 21 by transmitting or blocking light from the light source unit 23 based on the image signal generated by the video generation unit 24. It is composed of a liquid crystal panel.

  As shown in FIG. 2, the screen 30 is a screen for viewing a user sitting on a rear seat 192 in the vehicle 190. As shown in FIG. 3, the screen 30 is formed with an insertion hole 31 into which the fixing portion 22 of the projector 20 is inserted, and grooves 32 and 33 arranged in a part of the insertion hole 31. As shown in FIG. 1A, a state in which the screen 30 is opened with respect to the projector 20 and the screen 30 is at a position where an image can be projected by the projection unit 21 of the projector 20 is referred to as an unfolded state. The state where the screen 30 is closed with respect to the projector 20 as shown in FIG.

  As shown in FIG. 3, the open / close detection unit 40 includes a protrusion 41 inserted into the hole 22 a of the fixing unit 22 of the projector 20 and the grooves 32 and 33 of the screen 30 from the fixing unit 22 side of the projector 20. And a contact portion 43 attached to the tip of the protrusion 41 and a contact portion 44 attached in the groove 32 of the screen 30.

  Next, the operation of the in-vehicle video projector 10 will be described.

  When the power of the projector 20 is turned on, power is supplied from the power input unit 27, and the projector 20 projects an image.

  Here, when the screen 30 is rotated by the user in the direction indicated by the arrow 30a and the screen 30 is deployed in the state shown in FIG. 2, the protrusion 41 urged by the spring portion 42 of the open / close detection unit 40 is formed. Entering the groove 32 of the screen 30, the rotation of the screen 30 with respect to the projector 20 is stopped, and the screen 30 is fixed to the projector 20.

  When the projection 41 of the open / close detection unit 40 enters the groove 32 of the screen 30, the contact 43 and the contact 44 come into contact with each other as shown in FIG. Is detected by the open / close detection unit 40.

  Then, when the detection information output from the open / close detection unit 40 is input, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21 so that the image projected by the projector 20 is imaged on the screen 30. Therefore, the user sitting on the rear seat 192 in the vehicle 190 can view the image on the screen 30.

  As described above, since the projector 20 and the screen 30 are integrated in the in-vehicle video projection device 10, an image can be displayed from the projector 20 to the screen 30 without automatically rotating the projector 20 with respect to the screen 30. Can project.

  Further, the in-vehicle video projection device 10 can save the user time because the image such as the focal length of the projector 20 is adjusted only by unfolding the screen 30 from the housed state.

  The power supplied to the projector 20 may be supplied from the outside of the projector 20 or may be supplied from the inside by providing the projector 20 with a primary battery or a secondary battery. The method of supplying power to the projector 20 is not limited to these.

  Further, the focal length adjustment unit 28 may be supplied with power from the power input unit 27 or may be supplied with power from a power source independent of the power input unit 27. In the latter case, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21, that is, the focal length when the screen 30 is unfolded in a state where the power of the projector 20 is not turned on. Also good.

  Further, when the screen 30 is rotated from the deployed state to the retracted state and the open / close detection unit 40 no longer detects that the screen 30 is deployed, the automatic focus adjustment function by the focal length adjustment unit 28 is turned off, The lens position of the projection unit 21, that is, the focal length may be adjusted manually by the user.

  The structure in which the screen 30 is supported by the projector 20 is not limited to that shown in FIG. 3, and the screen 30 is stable in the housed state and the unfolded state, and has a structure that can detect either the housed state or the unfolded state. It only has to be. Further, the screen 30 may be configured to be fixed at an arbitrary angle. In this case, by providing a mechanism for detecting the installation angle of the screen 30, the video generation unit 24 may be configured according to the installation angle of the screen 30. The generated image may be trapezoidally corrected.

  The projector 20 may include a liquid crystal panel or a DMD (Digital Micromirror Device), and the projection method is not limited thereto. Further, in the internal structure of the projector 20, the projection unit 21, the image generation unit 24, the illumination optical system unit 25, and the projection image forming unit 26 are shown as the configuration for projecting the image. Any configuration can be used, and the configuration is not limited to this.

  Moreover, since the vehicle-mounted video projector 10 has a structure in which the projector 20 and the screen 30 are integrated, the installation position has a degree of freedom. For example, the in-vehicle video projection apparatus 10 uses a reflective screen as the screen 30, and the ceiling 191 in the vehicle 190 in a state where the projector 20 projects an image in front of the vehicle 190 as shown in FIG. 5. Can also be installed. Moreover, the vehicle-mounted image projector 10 can also be installed in the back surface of the front seat 193 of the vehicle 190, as shown in FIG. The position where the in-vehicle video projector 10 is installed is not limited to these. Further, a light shielding plate may be provided around the screen 30 so that the light projected by the projector 20 does not directly enter the user's eyes.

(Second Embodiment)
First, the configuration of the image projection apparatus according to the second embodiment will be described.

  In addition, about the structure similar to the structure of the image projection apparatus which concerns on 1st Embodiment among the structure of the image projection apparatus which concerns on this Embodiment, with the structure of the image projection apparatus which concerns on 1st Embodiment The same reference numerals are assigned and detailed description is omitted.

  As shown in FIG. 7, the configuration of the in-vehicle video projection apparatus as the image projection apparatus according to the present embodiment is such that the projector 50 is replaced with the projector 20 (see FIG. 4) and the in-vehicle video according to the first embodiment. The configuration is the same as that of the projector 10 (see FIG. 1).

  The configuration of the projector 50 is the same as the configuration in which the projector 20 includes a power control unit 51 as power control means for controlling power input from the outside.

  Here, the power input unit 27 supplies the power supplied from the power control unit 51 to the light source unit 23, the video generation unit 24, and the projection image formation unit 26.

  The power control unit 51 supplies power to the power input unit 27 when the open / close detection unit 40 detects that the screen 30 has been deployed.

  Next, the operation of the in-vehicle video projector according to the present embodiment will be described.

  When the opening / closing detection unit 40 detects that the screen 30 has been deployed by the user and the screen 30 has been deployed, the power control unit 51 supplies power to the power input unit 27 according to the detection information output by the opening / closing detection unit 40. Supply.

  The power input unit 27 supplies the power supplied from the power control unit 51 to the light source unit 23, the video generation unit 24, and the projection image formation unit 26.

  As described above, the vehicle-mounted video projection apparatus according to the present embodiment turns on the power of the entire apparatus simply by unfolding the screen 30 from the retracted state, and conversely, simply retracts the screen 30 from the unfolded state. Since the entire power supply is turned off, user convenience can be improved.

  The focal length adjustment unit 28 may be supplied with power from the power input unit 27 or may be supplied with power from a power source independent of the power input unit 27. In the former case, the detection information from the open / close detection unit 40 is not input to the focal length adjustment unit 28, and the focal length adjustment unit 28 adjusts the focal length when power is supplied from the power input unit 27. It may be.

  When the screen 30 is rotated from the deployed state to the housed state and the open / close detection unit 40 no longer detects that the screen 30 is deployed, the power supply from the power control unit 51 is stopped, and the projector 50 The power may be turned off.

(Third embodiment)
First, the configuration of the image projection apparatus according to the third embodiment will be described.

  In addition, about the structure similar to the structure of the image projection apparatus which concerns on 2nd Embodiment among the structure of the image projection apparatus which concerns on this Embodiment, with the structure of the image projection apparatus which concerns on 2nd Embodiment The same reference numerals are assigned and detailed description is omitted.

  As shown in FIG. 8, the configuration of the in-vehicle video projection apparatus as the image projection apparatus according to the present embodiment includes an operation unit 61 having a switch (not shown) for operating power on and power off of the entire apparatus, Based on the operation information input from the operation means 61, the opening / closing section 62 as an integrated screen position changing means for storing or unfolding the screen 30 and the operations of the focal length adjustment section 28, the power supply control section 51 and the opening / closing section 62 are controlled. The operation information processing unit 63 is replaced with the open / close detection unit 40 (see FIG. 7), and the configuration is the same as that of the in-vehicle video projection apparatus according to the second embodiment.

  Next, the operation of the in-vehicle video projector according to the present embodiment will be described.

  When the operation means 61 outputs operation information for turning on the power supply of the entire apparatus, the operation information processing unit 63 transfers the operation information to the focal length adjustment unit 28, the power supply control unit 51, and the opening / closing unit 62.

  Then, the power control unit 51 supplies power to the power input unit 27 in accordance with the operation information from the operation information processing unit 63. The opening / closing unit 62 controls to expand the screen 30 according to the operation information from the operation information processing unit 63. Further, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21 so as to form an image on the screen 30 according to the operation information from the operation information processing unit 63. Therefore, the user sitting on the rear seat 192 in the vehicle 190 can view the image on the screen 30.

  As described above, the in-vehicle video projection apparatus according to the present embodiment adjusts an image for the screen 30 and controls power supply to the projector 50 in accordance with a user operation on the operation unit 61. And since the position of the screen 30 with respect to the projector 50 is changed, a user's usability can be improved.

  The focal length adjustment unit 28 may be supplied with power from the power input unit 27 or may be supplied with power from a power source independent of the power input unit 27. In the former case, the operation information from the operation information processing unit 63 is not input to the focal length adjustment unit 28, and the focal length adjustment unit 28 adjusts the focal length when power is supplied from the power input unit 27. It may be like this.

  The operation information processing unit 63 is independent of the projector 50 and the operation unit 61 in FIG. 8, but may be disposed in the projector 50 or the operation unit 61. The position where the operation information processing unit 63 is arranged is not limited to these.

  The operation means 61 may be a wireless remote controller that outputs operation information using infrared rays or the like.

  Further, the transfer destination to which the operation information processing unit 63 transfers the operation information may be any one or only two of the focal length adjustment unit 28, the power supply control unit 51, and the opening / closing unit 62. In this case, the component to which the operation information is not transferred may be manually operated by the user.

(Fourth embodiment)
First, the configuration of the image projection apparatus according to the fourth embodiment will be described.

  In addition, about the structure similar to the structure of the image projection apparatus which concerns on 1st Embodiment among the structure of the image projection apparatus which concerns on this Embodiment, with the structure of the image projection apparatus which concerns on 1st Embodiment The same reference numerals are assigned and detailed description is omitted.

  As shown in FIGS. 9 to 11, the configuration of the in-vehicle video projection device 70 as the image projection device according to the present embodiment is a rear surface as a separate screen that is formed separately from the projector 20 and onto which an image is projected. As a projection-type screen 81, a storage unit 82 that is attached to the rear of the ceiling 191 in the vehicle 190 and winds and stores the screen 81, and a separate screen position detecting unit that detects opening and closing of the screen 81 with respect to the projector 20. The hook-type opening / closing detection unit 90 has the same configuration as that of the in-vehicle image projection device 10 (see FIG. 1) according to the first embodiment.

  Here, the video generation unit 24 generates an image signal of the video projected by the projection unit 21 and performs trapezoidal correction of the generated image as necessary. The focal length adjustment unit 28 adjusts the projected image so as to form an image on the screen 30 or the screen 81. That is, the video generation unit 24 and the focal length adjustment unit 28 constitute an image adjustment unit.

  The screen 81 is a screen for viewing by a user outside the vehicle 190.

  The open / close detection unit 90 detects whether or not the screen 81 is unfolded, and outputs detection information to the video generation unit 24 and the focal length adjustment unit 28.

  Next, the operation of the in-vehicle video projector 70 will be described.

  When the screen 30 is deployed in the state shown in FIG. 10, the open / close detection unit 40 detects that the screen 30 has been deployed and outputs detection information to the focal length adjustment unit 28. The lens position of the projection unit 21 is adjusted so that the image projected by the projector 20 is imaged on the screen 30. Therefore, the user sitting on the rear seat 192 in the vehicle 190 can view the image on the screen 30.

  On the other hand, as shown in FIG. 11, when the screen 30 is stored, the screen 81 is taken out of the storage unit 82 by the user, and a ring (not shown) provided at the lower end of the screen 81 is hooked on the open / close detection unit 90. The open / close detection unit 90 detects that the screen 81 has been deployed, and outputs detection information to the video generation unit 24 and the focal length adjustment unit 28. When the detection information from the open / close detection unit 90 is input, the video generation unit 24 performs trapezoidal correction of the generated video so that the shape of the video projected by the projector 20 is a correct rectangle on the screen 81. When the detection information from the open / close detection unit 90 is input, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21 so that the image projected by the projector 20 is imaged on the screen 81. Therefore, a user outside the vehicle 190 can view the image on the screen 81 from the rear of the vehicle 190 with the back door 194 of the vehicle 190 opened.

  As described above, the in-vehicle video projection device 70 is used for the viewing of the user sitting on the rear seat 192 in the vehicle 190 and the viewing of the user outside the vehicle 190 by the single projector 20. Can be used by switching. Further, the in-vehicle image projection device 70 performs focal length adjustment and keystone correction when the user sitting on the rear seat 192 in the vehicle 190 is used for viewing and when the user outside the vehicle 190 is used for viewing. Since this is done automatically, the user's trouble can be saved.

  Note that the method by which the separate screen position detection means detects that the screen 81 has been deployed is not limited to the method described above. For example, when a separate screen position detecting means is attached to the rear seat 192 and the rear seat 192 is tilted to project an image on the screen 81, it is determined that the screen 81 has been deployed. The screen position detection means may detect. Separate screen position detection means may be arranged in the storage portion 82.

  Further, since the screen 81 is installed in a flat shape, the storage portion 82 may always apply a force to the screen 81 in the direction in which the screen 81 is wound, or in the direction in which the screen 81 is wound in a state where the screen 81 is completely pulled out. The screen 81 may be provided with a stopper so that no force is applied. The method for stabilizing the screen 81 in the unfolded state is not limited to these.

  In addition to the rear of the ceiling 191 in the vehicle 190, the storage unit 82 may be installed at the rear of the lower part of the vehicle 190, the tip of the rear end of the trunk 195 of the vehicle 190, or the like. When the storage unit 82 is installed behind the lower part in the vehicle 190, the open / close detection unit 90 is preferably installed behind the ceiling 191 in the vehicle 190, but a position other than the rear of the ceiling 191 in the vehicle 190. May be installed. When the storage portion 82 is installed at the rearmost tip of the trunk 195, the open / close detection unit 90 is preferably installed at the rear of the lower part in the vehicle 190, but at a position other than the rear of the lower part in the vehicle 190. It may be installed.

  Further, the storage portion 82 is not limited to a roll for winding the screen 81. For example, the storage unit 82 may have a structure in which the screen 81 is placed flat on the ceiling 191 in the vehicle 190 during storage and is drawn out rearward in the vehicle 190 during use.

  The opening / closing detection unit 90 may not be a hook type, and the storage unit 82 may detect the development of the screen 81.

  Further, the technique described in the second embodiment or the third embodiment may be applied to this embodiment. When the technique described in the second embodiment is applied to this embodiment, the power is automatically turned on when the installation of the screen 30 or the screen 81 is detected. Further, the focal length adjustment and the keystone correction for projecting an image on the screen 81 may be performed only by detecting the storage of the screen 30. Conversely, focal length adjustment and keystone correction for projecting an image on the screen 30 may be performed simply by detecting the storage of the screen 81. When the technique described in the third embodiment is applied to the present embodiment, for example, the in-vehicle image projection device 70 includes separate screen position changing means for storing or deploying the screen 81, and the screen 30 and the screen 81 are provided. The operation means 61 may be provided with a switch for inputting which one to use. In the state where both the screen 30 and the screen 81 are accommodated, as described in the first embodiment, the automatic focus adjustment function by the focal length adjustment unit 28 is turned off, and the user manually enters the projection unit 21. The lens position, that is, the focal length can be adjusted.

(Fifth embodiment)
First, the configuration of the image projection apparatus according to the fifth embodiment will be described.

  In addition, about the structure similar to the structure of the image projection apparatus which concerns on 4th Embodiment among the structure of the image projection apparatus which concerns on this Embodiment, with the structure of the image projection apparatus which concerns on 4th Embodiment The same reference numerals are assigned and detailed description is omitted.

  As shown in FIGS. 12 and 13, the configuration of the in-vehicle video projection apparatus as the image projection apparatus according to the present embodiment includes a fourth reflecting member 100 that reflects the image projected by the projector 20 toward the screen 81. It is the same as that of the structure with which the vehicle-mounted image projector 70 (refer FIG. 10) which concerns on this embodiment was provided.

  However, the open / close detection unit 40 detects whether or not the reflection member 100 is deployed, and outputs detection information to the focal length adjustment unit 28, and constitutes a reflection member position detection unit.

  The screen 81 is a reflective screen for viewing by the user sitting on the front seat 193 in the vehicle 190.

  The storage part 82 is attached to the front of the ceiling 191 in the vehicle 190.

  The hook-type opening / closing detection unit 90 is attached to the lower front center of the vehicle 190.

  Similarly to the screen 30, the reflecting member 100 is supported by the fixed portion 22 of the projector 20 so as to be rotatable in the direction indicated by the arrow 30a.

  Next, the operation of the in-vehicle video projector according to the present embodiment will be described.

  When the screen 30 is deployed in the state shown in FIG. 12, the open / close detection unit 40 detects that the screen 30 has been deployed and outputs detection information. Then, when the detection information output from the open / close detection unit 40 is input, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21 so that the image projected by the projector 20 is imaged on the screen 30. Therefore, the user sitting on the rear seat 192 in the vehicle 190 can view the image on the screen 30.

  Further, as shown in FIG. 13, when the reflecting member 100 installed inside the screen 30 is taken out and the screen 81 is taken out from the storage unit 82 and installed, the open / close detection unit 90 unfolds the screen 81. And the detection information is output to the video generation unit 24 and the focal length adjustment unit 28. When the detection information is input from the open / close detection unit 90, the video generation unit 24 performs trapezoid correction of the generated video so that the shape of the video projected by the projector 20 is correctly rectangular on the screen 81. Further, when the detection information is input from the open / close detection unit 90, the focal length adjustment unit 28 adjusts the lens position of the projection unit 21 so that an image projected by the projector 20 is imaged on the screen 81. Therefore, the user sitting on the front seat 193 in the vehicle 190 can view the image on the screen 81.

  As described above, the in-vehicle video projection apparatus according to the present embodiment is used for the viewing of the user sitting on the rear seat 192 in the vehicle 190 and the front part in the vehicle 190 by one projector 20. It can be used by switching to the viewing of the user sitting on the seat 193. In addition, the in-vehicle video projection apparatus according to the present embodiment is used for viewing a user sitting on the rear seat 192 in the vehicle 190 and viewing the user sitting on the front seat 193 in the vehicle 190. Therefore, since the focal length adjustment and the keystone correction are automatically performed, it is possible to save the user's trouble. In addition, as described in the fourth embodiment, the in-vehicle video projection apparatus according to the present embodiment has a space necessary for viewing as compared to the case where both the screen 30 and the screen 81 are rear projection types. Can be reduced.

  In the in-vehicle video projection apparatus according to the present embodiment, when the opening / closing detection unit 40 detects that the reflecting member 100 is deployed, not when the opening / closing detection unit 90 detects that the screen 81 is deployed. In addition, the image projected by the projector 20 may be adjusted for the screen 81.

  Further, the method in which the separate screen position detecting means detects that the screen 81 has been deployed is not limited to the method described above. For example, a separate screen position detection unit may be disposed in the storage unit 82.

  The opening / closing detection unit 90 may not be a hook type, and the storage unit 82 may detect the development of the screen 81.

  Further, since the screen 81 is installed in a flat shape, the storage portion 82 may always apply a force to the screen 81 in the direction in which the screen 81 is wound, or in the direction in which the screen 81 is wound in a state where the screen 81 is completely pulled out. The screen 81 may be provided with a stopper so that no force is applied. The method for stabilizing the screen 81 in the unfolded state is not limited to these.

  Further, the storage portion 82 is not limited to a roll for winding the screen 81. For example, the storage unit 82 may have a structure in which the screen 81 is placed on the ceiling 191 in the vehicle 190 in a flat shape when stored and pulled out forward in the vehicle 190 when used.

  Note that the projector 20 may be installed at a different position by further providing one or more reflecting mirrors. Further, the projector 20 may be further installed on the rear side, and the screen 81 may be installed on the back surface of the front seat 193. Further, the reflecting member 100 may be a semi-transmissive mirror, and an image may be projected on both the screen 30 and the screen 81. In this case, the screen 30 is for a third-row seat seater.

  In order to prevent light projected by the projector 20 from directly entering the eyes of the user, a light shielding plate may be provided around the reflecting member 100. Further, the screen 30 may not be provided, and the reflecting member 100 may be attached to the vehicle 190 separately from the projector 20.

  Further, the technique described in the second embodiment or the third embodiment may be applied to this embodiment. When the technique described in the second embodiment is applied to this embodiment, the power is automatically turned on when the installation of the screen 30 or the screen 81 is detected. Further, the focal length adjustment and the keystone correction for projecting an image on the screen 81 may be performed only by detecting the storage of the screen 30. Conversely, focal length adjustment and keystone correction for projecting an image on the screen 30 may be performed simply by detecting the storage of the screen 81. When the technique described in the third embodiment is applied to the present embodiment, for example, the in-vehicle video projection apparatus according to the present embodiment includes separate screen position changing means for storing or deploying the screen 81, and the screen 30 and the screen 81 need only be provided with a switch for inputting which one to use. In addition, the in-vehicle video projection device according to the present embodiment deploys the reflecting member 100 simultaneously when the screen 81 is deployed, or accommodates the reflecting member 100 simultaneously when the screen 81 is accommodated. Position changing means may be provided. In the state where both the screen 30 and the screen 81 are accommodated, as described in the first embodiment, the automatic focus adjustment function by the focal length adjustment unit 28 is turned off, and the user manually enters the projection unit 21. The lens position, that is, the focal length can be adjusted.

  In addition, as a form combining the fourth embodiment and the present embodiment, a user's ornamental screen sitting on the rear seat 192 in the vehicle 190 and a front seat 193 in the vehicle 190 are seated. It is also possible to have a structure in which three screens consisting of a screen for viewing a user and a screen for viewing a user outside the vehicle 190 are mounted to detect the opening and closing of all the screens.

  In all the embodiments, the projector 20, the screen 30, and the reflecting member 100 are not installed on an integrated device, but may be installed as separate devices.

  As described above, the image projection apparatus according to the present invention has an effect that an image can be projected from the projector onto the screen without automatically rotating the projector with respect to the screen. It is useful as an in-vehicle video projection device that is mounted and provides video to passengers.

(A) External perspective view of the in-vehicle video projector according to the first embodiment of the present invention with the screen unfolded (b) The in-vehicle video shown in FIG. 1 (a) with the screen stored External perspective view of projection device Side view of a vehicle equipped with the in-vehicle video projection device shown in FIG. Side surface sectional drawing of a part of vehicle-mounted image projector shown in FIG. Block diagram of the in-vehicle video projector shown in FIG. The side view of the vehicle which mounts the vehicle-mounted image projector shown in FIG. 1 in the state different from the state shown in FIG. The perspective view of the front seat of the vehicle which mounts the vehicle-mounted image projector shown in FIG. 1 in a state different from the state shown in FIGS. The block diagram of the vehicle-mounted image projector which concerns on the 2nd Embodiment of this invention The block diagram of the vehicle-mounted image projector which concerns on the 3rd Embodiment of this invention The block diagram of the vehicle-mounted image projector which concerns on the 4th Embodiment of this invention Side view of a vehicle equipped with an in-vehicle image projection device according to a fourth embodiment of the present invention in a state in which a screen for viewing a user sitting on a rear seat in the vehicle is unfolded Side view of a vehicle equipped with the in-vehicle video projection device shown in FIG. 10 in a state in which a screen for viewing users outside the vehicle is deployed. Side view of a vehicle equipped with an in-vehicle image projection device according to a fifth embodiment of the present invention in a state where a screen for viewing a user sitting on a rear seat in the vehicle is unfolded Side view of a vehicle equipped with the in-vehicle video projection device shown in FIG.

Explanation of symbols

10 In-vehicle video projector (image projector)
20 Projector 24 Video generator (image adjustment means)
28 Focal length adjustment unit (image adjustment means)
30 screens (integrated screen)
40 Open / close detection unit (integrated screen position detection means, reflection member position detection means)
50 Projector 51 Power control unit (power control means)
61 Operating means 62 Opening / closing part (integrated screen position changing means)
70 On-vehicle video projector (image projector)
81 screen (separate screen)
90 Open / close detection unit (separate screen position detection means)
100 Reflective member 190 Vehicle 191 Ceiling 193 Front seat (seat)

Claims (19)

A projector that projects an image; an integral screen that is integrally formed with the projector so that the position relative to the projector can be changed; and an integral screen position detecting unit that detects the position of the integral screen relative to the projector; An image projection apparatus comprising: an image adjusting unit that adjusts the image for the integrated screen according to the position of the integrated screen detected by the integrated screen position detecting unit. The image adjustment means adjusts the image for the integrated screen only when the position of the integrated screen detected by the integrated screen position detecting means is a predetermined position. Image projection device. The image projection apparatus according to claim 1, further comprising: a power control unit that controls supply of power to the projector according to the position of the integrated screen detected by the integrated screen position detection unit. With operating means operated by the user,
The image projection apparatus according to claim 1, wherein the image adjustment unit adjusts the image for the integrated screen in accordance with a user operation on the operation unit. The apparatus according to claim 1, further comprising: an operation unit that is operated by a user; and a power control unit that controls supply of electric power to the projector according to an operation of the user to the operation unit. Image projection device. 2. An operation unit operated by a user, and an integrated screen position changing unit that changes a position of the integrated screen with respect to the projector in accordance with a user operation on the operation unit. The image projection apparatus described in 1. A separate screen that is formed separately from the projector and onto which the image is projected;
2. The separate screen is arranged at a position where the image is projected by the projector when the integrated screen is located at a position other than a position where the image is projected by the projector. The image projection apparatus described. The image projection apparatus according to claim 7, wherein the image adjusting unit adjusts the image for the separate screen according to the position of the integrated screen detected by the integrated screen position detecting unit. A separate screen position detecting means for detecting the position of the separate screen relative to the projector;
The image projection according to claim 7, wherein the image adjustment unit adjusts the image for the separate screen according to the position of the separate screen detected by the separate screen position detection unit. apparatus. 9. The image adjusting unit according to claim 8, wherein the image adjusting unit adjusts the image for the separate screen only when the position of the integrated screen detected by the integrated screen position detecting unit is a predetermined position. The image projection apparatus described. The image adjusting means adjusts the image for the separate screen only when the position of the separate screen detected by the separate screen position detecting means is a predetermined position. 9. The image projection apparatus according to 9. The image projection apparatus according to claim 9, further comprising a power control unit configured to control power supply to the projector according to the position of the separate screen detected by the separate screen position detection unit. . An operating means operated by a user, and separate screen position changing means for changing the position of the separate screen relative to the projector in response to a user operation on the operating means. Item 8. The image projection device according to Item 7. A reflection member that reflects the image projected by the projector toward the separate screen;
The integral screen is a rear projection type screen,
The image projection apparatus according to claim 7, wherein the separate screen is a reflective screen. A reflecting member position detecting means for detecting the position of the reflecting member with respect to the projector;
The image projection apparatus according to claim 14, wherein the image adjustment unit adjusts the image for the separate screen according to the position of the reflection member detected by the reflection member position detection unit. The image projection apparatus according to claim 14, further comprising a reflection member position changing unit that changes a position of the reflection member with respect to the projector according to a position of the separate screen with respect to the projector. A vehicle comprising the image projection device according to claim 1 on at least one of an internal ceiling and a back surface of an internal seat. The image projector according to claim 7 is provided on an internal ceiling in a state where the projector projects the image backward.
The vehicle according to claim 1, wherein the integral screen and the separate screen are rear projection screens. 15. A vehicle comprising the image projection device according to claim 14 on an internal ceiling in a state in which the projector projects the image backward.

Images