JP2009273552A - Projection image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection image display device achieving a new application method, wherein a projected image and a user are combined by utilizing the projection image display device having a reduced distance between the projection image display device and a projection screen. <P>SOLUTION: The projection image display device 100 has a case 400 containing an image light generation section 200 and a projection optical system 300. The projection optical system 300 has a reflective mirror 320. The image light generation section 200 has an image control section 254 which controls images displayed on the projection screen 210 based on the basic information including at least user information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projection display apparatus having a projection optical system for projecting image light.

  2. Description of the Related Art Conventionally, there is known a projection display apparatus including a light modulation element that modulates light emitted from a light source and a projection lens that projects light emitted from the light modulation element onto a projection surface (screen).

  Here, in order to display a large image on the screen, it is necessary to increase the distance between the projection lens and the screen. On the other hand, a projection display system has been proposed in which the distance between the projection display apparatus and the screen is reduced by using a reflection mirror that reflects the light emitted from the projection lens to the screen side ( For example, Patent Document 1).

Here, if the distance between the projection display apparatus and the screen is reduced, the projection display apparatus becomes closer to the screen and the projection display apparatus enters the user's field of view. It is necessary to perform oblique projection from the side. For example, in the above-described projection display system, the positional relationship between the light modulation element and the projection optical system is shifted in the vertical direction, and the projection distance is shortened and oblique projection is performed by using a concave mirror as the reflection mirror. .
JP 2006-235516 A (Claim 1, FIG. 1, etc.)

  By the way, there are new methods for installing and projecting a projection display device that shortens the projection distance, such as a method of installing the projection display device on the floor or desk and projecting it on the floor or desk. Possible installation / projection methods. On the other hand, there is not much consideration in what scene the new installation / projection method can be used.

  Accordingly, the present invention has been made to solve the above-described problem, and a projection image and a user can be obtained using a projection image display device that shortens the distance between the projection image display device and the projection surface. An object of the present invention is to provide a projection display apparatus that realizes a new utilization method combining the above.

  The projection display apparatus according to the first feature includes an image light generation unit (image light generation unit 200) that generates image light and a projection optical system (projection optical system 300) that projects the image light. . The projection optical system includes a reflection mirror (reflection mirror 320) that reflects the image light emitted from the image light generation unit. The video light generation unit is configured to acquire basic information including at least user information indicating characteristics of a user located on the projection plane (basic information acquisition unit 251), and based on the basic information, the basic information acquisition unit 251 A video control unit (video control unit 254) that controls the video displayed on the projection surface;

  According to the first feature, the video control unit controls a video displayed on the projection plane based on basic information including at least user information. Therefore, an image suitable for the user can be displayed. Further, the projection display apparatus may be installed on a predetermined installation surface and project image light on a projection surface (projection surface 210) substantially parallel to the predetermined installation surface.

  In the first feature, the projection display apparatus accommodates the image light generation unit and the projection optical system, and is disposed on a predetermined installation surface (housing 400) and within the predetermined installation surface. A moving unit (moving unit 600) for moving the housing is further provided. The moving unit adjusts a position of an image displayed on the projection plane by moving the casing.

  In the first feature, the imaging light generation unit includes a first acquisition unit (first acquisition unit 252) that acquires imaging data from an imaging device (imaging device 500) that images the projection plane, and the imaging data. Separately, it has a second acquisition unit (second acquisition unit 253) that acquires sample data. The video control unit superimposes the captured video constituted by the imaging data on the sample video constituted by the sample data on the projection plane. In a case where the projection display apparatus projects image light on a projection plane (projection plane 210) substantially parallel to the predetermined installation plane, the imaging apparatus preferably images the projection plane from above the projection plane.

  In the first feature, an image displayed on the projection plane includes a reference position of a user's foot in golf, a reference position of a golf ball with respect to the reference position of the foot, or a reference trajectory of a golf swing.

  In the first feature, the basic information includes a type of practice swing in addition to the user information. The video control unit changes a reference position of the foot, a reference position of the golf ball, or a reference trajectory of the golf swing based on the basic information.

  In the first feature, the sample image includes a reference track of a golf swing. The captured image includes a golf swing trajectory of a user located on the projection plane. The video control unit superimposes the golf swing trajectory of the user on the golf swing reference trajectory.

  In the first feature, the projection display apparatus includes a protection cover (protection cover 400a) provided on the optical path of the image light reflected by the reflection mirror. The protective cover has a transmission region (transmission region 410) that transmits the image light. The reflection mirror condenses the image light emitted from the image light generation unit between the reflection mirror and the projection plane. The transmission region is disposed in the vicinity of a position where the image light is collected by the reflection mirror.

  In the above-described feature, the protective cover has an opening communicating from the reflection mirror side to the projection plane side. The transmissive region is the opening.

  In the above-described feature, at least a part of the protective cover is formed of a light transmissive member. The transmissive region is constituted by the light transmissive member.

  According to the present invention, a projection image display that realizes a new utilization method combining a projection image and a user by using a projection image display device that shortens the distance between the projection image display device and the projection surface. An apparatus can be provided.

  Hereinafter, a projection display apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
(Configuration of projection display device)
Hereinafter, the configuration of the projection display apparatus according to the first embodiment will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a projection display apparatus 100 according to the first embodiment.

  As shown in FIG. 1, the projection display apparatus 100 includes a housing 400 that houses an image light generation unit 200 and a projection optical system 300. In the first embodiment, a part of the housing 400 constitutes a protective cover 400a. The projection display apparatus 100 is installed on the installation surface 220.

  The video light generation unit 200 generates video light. Specifically, the video light generation unit 200 includes at least a display element 40 that emits video light. The display element 40 is provided at a position shifted with respect to the optical axis L of the projection optical system 300. The display element 40 is, for example, a reflective liquid crystal panel, a transmissive liquid crystal panel, or a DMD (Digital Micromirror Device). Details of the image light generation unit 200 will be described later (see FIG. 2).

  The projection optical system 300 projects the image light emitted from the image light generation unit 200. Here, the projection optical system 300 projects image light onto the projection plane 210. Specifically, the projection optical system 300 includes a projection lens 310 and a reflection mirror 320.

  The projection lens 310 emits the image light emitted from the image light generation unit 200 to the reflection mirror 320 side.

  The reflection mirror 320 reflects the image light emitted from the projection lens 310. The reflection mirror 320 condenses the image light and widens the image light. For example, the reflection mirror 320 is an aspherical mirror having a concave surface on the image light generation unit 200 side.

  The protective cover 400 a is a cover that protects the reflection mirror 320. The protective cover 400a is provided at least on the optical path of the image light reflected by the reflection mirror 320. The protective cover 400a has a transmission region 410 that transmits image light.

  As described above, the projection optical system 300 projects the image light transmitted through the transmission region 410 onto the projection plane 210.

  Here, the projection surface 210 is a surface substantially parallel to the installation surface 220. In the first embodiment, it is assumed that the user X is located on the projection plane 210. For example, the user X practices a golf swing using an image displayed on the projection plane 210.

  In the first embodiment, an imaging device 500 that captures an image of the projection plane 210 from above the projection plane 210 is provided. The imaging device 500 is preferably provided immediately above the projection plane 210. The imaging device 500 is attached to, for example, a ceiling.

(Configuration of image light generator)
Hereinafter, the configuration of the video light generation unit according to the first embodiment will be described with reference to the drawings. FIG. 2 is a diagram mainly illustrating the video light generation unit 200 according to the first embodiment. The video light generation unit 200 includes a power supply circuit (not shown), a video signal processing circuit (not shown), and the like in addition to the configuration shown in FIG. Here, a case where the display element 40 is a transmissive liquid crystal panel is illustrated.

  The video light generation unit 200 includes a light source 10, a fly-eye lens unit 20, a PBS array 30, a plurality of liquid crystal panels 40 (a liquid crystal panel 40R, a liquid crystal panel 40G, and a liquid crystal panel 40B), and a cross dichroic prism 50. .

  The light source 10 is a UHP lamp configured by a burner and a reflector. The light emitted from the light source 10 includes red component light, green component light, and blue component light.

  The fly-eye lens unit 20 makes the light emitted from the light source 10 uniform. Specifically, the fly eye lens unit 20 includes a fly eye lens 20a and a fly eye lens 20b.

  The fly-eye lens 20a and the fly-eye lens 20b are each composed of a plurality of minute lenses. Each microlens condenses the light emitted from the light source 10 so that the light emitted from the light source 10 is irradiated on the entire surface of the liquid crystal panel 40.

  The PBS array 30 aligns the polarization state of the light emitted from the fly-eye lens unit 20. In the first embodiment, the PBS array 30 aligns the light emitted from the fly-eye lens unit 20 with P-polarized light.

  The liquid crystal panel 40R modulates the red component light by rotating the polarization direction of the red component light. An incident-side polarizing plate 41R that transmits light having one polarization direction (for example, P-polarized light) and shields light having another polarization direction (for example, S-polarized light) on the light incident surface side of the liquid crystal panel 40R. Is provided. On the light exit surface side of the liquid crystal panel 40R, an exit-side polarizing plate 42R that blocks light having one polarization direction (for example, P-polarized light) and transmits light having another polarization direction (for example, S-polarized light). Is provided.

  Similarly, the liquid crystal panel 40G and the liquid crystal panel 40B modulate the green component light and the blue component light by rotating the polarization directions of the green component light and the blue component light, respectively. An incident side polarizing plate 41G is provided on the light incident surface side of the liquid crystal panel 40G, and an emission side polarizing plate 42G is provided on the light output surface side of the liquid crystal panel 40G. An incident side polarizing plate 41B is provided on the light incident surface side of the liquid crystal panel 40B, and an emission side polarizing plate 42B is provided on the light emitting surface side of the liquid crystal panel 40B.

  The cross dichroic prism 50 combines light emitted from the liquid crystal panel 40R, the liquid crystal panel 40G, and the liquid crystal panel 40B. The cross dichroic prism 50 emits combined light to the projection lens 310 side.

  The image light generation unit 200 includes a mirror group (dichroic mirror 111, dichroic mirror 112, reflection mirror 121 to reflection mirror 123), and a lens group (condenser lens 131, condenser lens 140R, condenser lens 140G, condenser lens 140B, relay). Lens 151 to relay lens 152).

  The dichroic mirror 111 transmits red component light and green component light in the light emitted from the PBS array 30. The dichroic mirror 111 reflects blue component light out of the light emitted from the PBS array 30.

  The dichroic mirror 112 transmits red component light out of the light transmitted through the dichroic mirror 111. The dichroic mirror 112 reflects green component light out of the light transmitted through the dichroic mirror 111.

  The reflection mirror 121 reflects the blue component light and guides the blue component light to the liquid crystal panel 40B side. The reflection mirror 122 and the reflection mirror 123 reflect the red component light and guide the red component light to the liquid crystal panel 40R side.

  The condenser lens 131 is a lens that collects white light emitted from the light source 10.

  The condenser lens 140R collimates the red component light so that the liquid crystal panel 40R is irradiated with the red component light. The condenser lens 140G collimates the green component light so that the liquid crystal panel 40G is irradiated with the green component light. The condenser lens 140B collimates the blue component light so that the liquid crystal panel 40B is irradiated with the blue component light.

  The relay lens 151 to the relay lens 152 substantially image the red component light on the liquid crystal panel 40R while suppressing the expansion of the red component light.

(Function of projection display device)
Hereinafter, functions of the projection display apparatus according to the first embodiment will be described with reference to the drawings. FIG. 3 is a block diagram showing the control unit 250 provided in the projection display apparatus 100 according to the first embodiment. The control unit 250 is provided in the video light generation unit 200.

  As illustrated in FIG. 3, the control unit 250 includes a basic information acquisition unit 251, a first acquisition unit 252, a second acquisition unit 253, and a video control unit 254.

  The basic information acquisition unit 251 acquires basic information from an input IF (not shown) such as a keyboard. The basic information includes, for example, user information indicating the characteristics of the user X. In addition to the user information, the basic information may include a practice swing type (hereinafter, swing type). In the first embodiment, the basic information includes user information and a swing type.

  The user information is, for example, the sex of the user X, the height of the user X, and the like. The type of practice swing includes the type of golf club on which the user X practices swing, the distance of practice swing, and the like.

  The first acquisition unit 252 acquires imaging data from the imaging device 500. The imaging data is video data for displaying a captured video imaged by the imaging device 500. The captured image includes the golf swing path of the user X.

  The second acquisition unit 253 acquires sample data from an external device such as a DVD playback device. The sample data is video data for displaying a sample video. The sample video includes a reference position (hereinafter referred to as reference stance) of the user's foot in golf, a reference position of the golf ball relative to the reference stance (hereinafter referred to as reference ball position), or a reference path of the golf swing. In the first embodiment, the sample image includes a reference stance, a reference ball position, and a reference track of a golf swing.

  Note that the second acquisition unit 253 may acquire sample data from a hard disk device instead of an external device. The first acquisition unit 252 may acquire sample data from a network such as a LAN.

  The video control unit 254 controls the video displayed on the projection plane 210. That is, the video control unit 254 controls the display element 40 (liquid crystal panel 40R to liquid crystal panel 40B).

  Specifically, the video control unit 254 changes the sample data acquired by the second acquisition unit 253 based on the basic information acquired by the basic information acquisition unit 251.

  For example, as shown in FIG. 4, the video control unit 254 includes a table that defines sample data by basic information (that is, swing type and user information). The video control unit 254 selects sample data corresponding to the basic information with reference to the table shown in FIG. For example, when a man with a height of 175 cm practices a long iron swing, the video control unit 254 selects the sample data 11.

  Subsequently, the video control unit 254 controls the display element 40 based on the sample data corresponding to the basic information. As a result, a sample image constituted by the sample data is displayed on the projection plane 210.

  Here, the video control unit 254 superimposes the captured video constituted by the imaging data on the sample video constituted by the sample data on the projection plane 210. Specifically, the video control unit 254 superimposes the golf swing trajectory (imaging data) of the user X on the golf swing reference trajectory (sample data).

(Example of video display)
Hereinafter, a display example of an image according to the first embodiment will be described with reference to the drawings. 5 and 6 are diagrams illustrating display examples of video according to the first embodiment.

  First, a sample image displayed on the projection plane 210 will be described with reference to FIG. As shown in FIG. 5, the sample image includes a reference stance, a reference ball position, and a reference trajectory. The basic image may include a guideline for clarifying the reference ball position with respect to the reference stance.

  Next, a sample image and a captured image displayed on the projection plane 210 will be described with reference to FIG. As shown in FIG. 6, the golf swing trajectory (image data) of the user X is superimposed on the golf swing reference trajectory (sample data). In FIG. 6, the golf swing of the user X is an out-in swing. Thereby, the user X can easily grasp the cause of the slice.

(Function and effect)
In the first embodiment, the protective cover 400 a is provided on the optical path of the image light reflected by the reflection mirror 320. Therefore, it is possible to suppress the user from coming into contact with the reflection mirror 320 and changing the angle of the reflection mirror 320 and the like. Further, the protective cover 400a includes a transmission region 410 that transmits the image light reflected by the reflection mirror 320. Therefore, the image light irradiated onto the projection surface 210 is not hindered by the protective cover 400a. As described above, it is possible to maintain a favorable arrangement accuracy of the reflection mirror 320 provided for shortening the distance between the projection display apparatus 100 and the projection surface.

  The video control unit 254 controls the video displayed on the projection plane based on basic information including at least user information. Therefore, an image suitable for the user can be displayed. In particular, application to practice of golf swing is effective.

  The video control unit 254 superimposes the captured video constituted by the imaging data on the sample video constituted by the sample data. Therefore, the user X can easily grasp whether or not the operation of the user X deviates from the sample. Application to practice of golf swing is effective.

[Second Embodiment]
Hereinafter, the second embodiment will be described with reference to the drawings. In the following, differences between the first embodiment and the second embodiment will be mainly described.

  Specifically, in the second embodiment, the projection display apparatus 100 includes a moving unit 600 that moves the housing 400 within the installation surface 220, as shown in FIG.

  The moving unit 600 is provided on the installation surface 220 and supports the housing 400 from below. For example, a guide rail for moving the housing 400 is provided on the upper surface of the moving unit 600. In addition, wheels may be provided on the lower surface of the moving unit 600.

  The moving unit 600 adjusts the position of the image displayed on the projection plane 210 by moving the housing 400.

(Function and effect)
In the second embodiment, a case where the position of the golf ball is fixed is assumed. Examples of such a case include a case where a golf ball is hit by teeing up and a case where a golf ball is automatically set.

  Incidentally, the relationship between the position of the golf ball and the position (stance) of the user's foot is generally different for each user. The second embodiment assumes a case where fine adjustment of the positional relationship between the reference ball position and the reference stance is performed.

  If the moving unit 600 is not provided, the user must stand at a position outside the reference stance in order to finely adjust the positional relationship.

  On the other hand, in the second embodiment, the moving unit 600 adjusts the position of the image displayed on the projection plane 210 by moving the housing 400. Accordingly, the positional relationship can be finely adjusted while the user is standing on the reference stance. It should be noted that although the position of the golf ball deviates from the reference ball position, there is no particular inconvenience because the golf ball serves as a mark.

[Third Embodiment]
Hereinafter, a third embodiment will be described with reference to the drawings. In the following, differences between the first embodiment and the third embodiment will be mainly described.

  In the first embodiment, the basic information acquisition unit 251 acquires basic information including user information (for example, height) from an input IF (not shown) such as a keyboard. On the other hand, in 3rd Embodiment, the basic information acquisition part 251 acquires user information (for example, height etc.) with imaging data.

  Specifically, in the third embodiment, the projection display apparatus 100 includes an imaging device 710 that captures an image of the user X as shown in FIG. A background surface 720 is provided at a position facing the imaging device 710 across the user X.

  As illustrated in FIG. 9, the background surface 720 includes grid-like auxiliary lines 721. Here, it is assumed that the interval between the auxiliary lines 721 is set in the basic information acquisition unit 251 in advance.

  As illustrated in FIG. 9, the imaging device 710 images the background surface 720 having the auxiliary line 721 and the user X. The imaging device 710 images the user X with both hands and both legs open.

  The basic information acquisition unit 251 identifies feature points such as the crown, both hands, both feet, and crotch based on the imaging data. The basic information acquisition unit 251 acquires the length of the hand of the user X, the length of the foot of the user X, the height of the user X, and the like based on the positional relationship between the feature points and the auxiliary line 721. That is, the basic information acquisition unit 251 acquires user information including the height of the user X and the like from the imaging data.

  Note that the feature points are not limited to the top of the head, both hands, and both feet. The feature points may include sites that specify the outer shape of the user X, such as joints such as elbows and knees, chest, abdomen, and waist.

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  Although not particularly mentioned in the above-described embodiment, the protective cover 400a may have an opening that communicates from the reflection mirror 320 to the projection plane 210 side. The transmissive region 410 may be such an opening.

  Although not particularly mentioned in the above-described embodiment, at least a part of the protective cover 400a may be configured by a light transmissive member such as a transparent resin or glass. The transmissive region 410 may be configured by such a light transmissive member.

  Although not particularly mentioned in the above-described embodiment, the reflection mirror 320 condenses the image light emitted from the image light generation unit 200 between the reflection mirror 320 and the projection surface 210. The transmission region 410 is preferably provided in the vicinity of the position where the image light is collected by the reflection mirror 320.

  In the above-described embodiment, the case where an aspherical mirror is used as the reflecting mirror 320 is illustrated, but the reflecting mirror 320 is not limited to this. For example, a free-form surface mirror may be used as the reflection mirror 320. If the aberration and resolution are devised, a spherical mirror may be used as the reflection mirror 320.

  In the embodiment described above, the case (three-plate type) using a plurality of display elements 40 is illustrated as the configuration of the video light generation unit 200, but the configuration of the video light generation unit 200 is not limited to this. A single display element 40 may be used as the configuration of the image light generation unit 200 (single plate type).

  In the embodiment described above, the imaging device 500 is provided directly above the projection plane 210, but the arrangement of the imaging device 500 is not limited to this. Specifically, the imaging apparatus 500 may be provided in the projection display apparatus 100. In such a case, the imaging apparatus 500 images the projection plane 210 from obliquely above. Therefore, it is preferable that the video control unit 254 generates a captured image when the projection plane 210 is viewed from directly above, based on the imaging data acquired from the imaging device 500.

  In the embodiment described above, the projection plane 210 is a plane substantially parallel to the installation plane 220, but the position of the projection plane 210 is not limited to this. The projection surface 210 may be a surface that is substantially perpendicular to the installation surface 220. In such a case, the imaging device 500 may be provided at a position where the projection plane 210 is imaged. In addition, the user X is located in front of the projection plane 210.

  In the embodiment described above, the image displayed on the projection plane 210 is used for golf swing practice, but the method of using the image is not limited to this. For example, the image displayed on the projection plane 210 may be used for practice of a dance step. In such a case, the sample image includes a reference dance step and the like.

  According to each embodiment, as described above, the distance between the projection display apparatus and the projection surface is shortened by providing the reflection mirror 320. Accordingly, it is possible to prevent the person from entering between the projection display apparatus and the projection surface and blocking the image light. Further, when an LD is used as the light source 10, it is possible to reduce the possibility that a person is irradiated with laser light (image light).

1 is a diagram showing a projection display apparatus 100 according to a first embodiment. It is a figure which shows the structure of the image light production | generation part 200 which concerns on 1st Embodiment. It is a block diagram which shows the control unit 250 which concerns on 1st Embodiment. It is a figure which shows an example of the table which concerns on 1st Embodiment. It is a figure shown about the example of a display concerning 1st Embodiment. It is a figure shown about the example of installation concerning 1st Embodiment. It is a figure which shows the projection type video display apparatus 100 concerning 2nd Embodiment. It is a figure which shows the projection type video display apparatus 100 concerning 3rd Embodiment. It is a figure which shows the captured image which concerns on 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Light source, 20 ... Fly eye lens unit, 30 ... PBS array, 40 ... Display element, 41 ... Incident side deflecting plate, 42 ... Outgoing side deflecting plate, 50 ... Cross dichroic prism, 100... Projection type image display device, 111... Dichroic mirror, 112... Dichroic mirror, 121 to 123. Lenses 151-152 ... Relay lens 200 ... Video light generator 210 ... Projection surface 220 ... Installation surface 250 ... Control unit 251 ... Basic information acquisition unit 252 ... 1st acquisition unit, 253 ... 2nd acquisition unit, 254 ... Image control unit, 300 ... Projection optical system, 310 ... Projection lens, 320 ... Reflection mirror 400 ... casing, 400a ... protective cover, 410 ... transmission region, 500 ... imaging device, 600 ... moving unit, 710 ... imaging device, 720 ... background surface , 721 ... Auxiliary line

Claims (9)

A projection-type image display device comprising: an image light generation unit that generates image light; and a projection optical system that projects the image light,
The projection optical system includes a reflection mirror that reflects the image light emitted from the image light generation unit,
The image light generator is
A basic information acquisition unit that acquires basic information including at least user information indicating characteristics of a user located on the projection plane;
And a video control unit that controls a video displayed on the projection plane based on the basic information. A housing that houses the image light generation unit and the projection optical system and is installed on a predetermined installation surface;
A moving unit that moves the housing within the predetermined installation surface;
The projection display apparatus according to claim 1, wherein the moving unit adjusts a position of an image displayed on the projection plane by moving the casing. The image light generator is
A first acquisition unit that acquires imaging data from an imaging device that images the projection plane;
A second acquisition unit that acquires sample data separately from the imaging data;
The projection image display apparatus according to claim 1, wherein the image control unit superimposes a captured image configured by the captured image data on a sample image configured by the sample data on the projection plane. .   The image displayed on the projection plane includes a reference position of a user's foot in golf, a reference position of a golf ball with respect to the reference position of the foot, or a reference track of a golf swing. The projection-type image display device described. The basic information includes a type of practice swing in addition to the user information,
5. The projection type according to claim 4, wherein the image control unit changes a reference position of the foot, a reference position of the golf ball, or a reference trajectory of the golf swing based on the basic information. Video display device. The sample image includes a golf swing reference trajectory,
The captured image includes a golf swing path of a user located on the projection plane,
The projection image display apparatus according to claim 3, wherein the image control unit superimposes the golf swing trajectory of the user on a reference trajectory of the golf swing. A protective cover provided on the optical path of the image light reflected by the reflecting mirror;
The protective cover has a transmission region that transmits the image light,
The reflection mirror condenses the image light emitted from the image light generation unit between the reflection mirror and the projection plane,
The projection image display apparatus according to claim 1, wherein the transmission region is disposed in a vicinity of a position where the image light is collected by the reflection mirror. The protective cover has an opening communicating from the reflecting mirror side to the projection surface side,
The projection display apparatus according to claim 7, wherein the transmission region is the opening. At least a part of the protective cover is made of a light transmissive member,
The projection display apparatus according to claim 7, wherein the transmission region is configured by the light transmissive member.

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