JP3080097U - Projection image aspect converter - Google Patents

Abstract

(57) [Summary] Projection image aspect conversion device capable of projecting a vertically long observation object in an image area displayed on a liquid crystal panel of a liquid crystal projector on a screen with an efficient size and brightness. I will provide a. An illumination light source, a liquid crystal panel, and a light projecting lens are provided.
In the optical path from the light projecting lens 16 of the liquid crystal projector 10 to the screen, the first reflecting surface 2 is inclined at a predetermined angle with respect to the Z direction and the Y direction, and extends along the X direction. Inclined at a predetermined angle to the direction,
And a second reflecting surface 3 extending in the Z direction, and reflecting the light emitted from the light projecting lens 16 on the first reflecting surface 2 and the second reflecting surface 3 to display on the liquid crystal panel. The projected image can be projected vertically and horizontally on the screen surface.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is directed to a vertical / horizontal conversion of an image displayed on an image display device such as a liquid crystal panel or a digital micromirror device (DMD) emitted from a projector via a light source for illumination in a manner that changes the vertical / horizontal direction of the image onto a screen. Related to the device.

[0002]

[Prior art]

 In recent years, presentations by enlarging and projecting electronic images via a computer or the like with a projector device have increased. In general, a liquid crystal projector includes an illumination light source, an optical system for dividing the illumination light, a liquid crystal panel that transmits the divided light, a combining unit that combines the light transmitted through the liquid crystal panel, and an enlargement of the combined light. And a projection optical system that projects the image on a screen.

FIG. 6 is a schematic configuration diagram showing a conventional example of a liquid crystal projector. In this conventional example, the liquid crystal projector 10 includes dichroic mirrors 12a, 12c, and reflection mirrors 12b, 12d that reflect light emitted from the illumination light source 11 to reflect light of a predetermined wavelength and pass light of other wavelengths. , 12e, and is divided into light of three primary colors of R, G, and B, and guided to condenser lenses 13a, 13b, and 13c. Each of the divided color lights is condensed through condenser lenses 13a, 13b, and 13c. The liquid crystal panels 14a, 14b, and 14c adapted to the three primary color lights are provided, and the light emitted from each liquid crystal panel is provided with a reflecting surface that reflects only the corresponding color light and transmits the other light. The light is made incident on a cross prism 15 composed of four triangular prisms, combined into light of three primary colors, emitted in one direction, and projected onto a projection lens 16. Isa allowed, thereby making it possible to observe the image by projecting projected to the reflection type or transmission type screen light is not shown emitted from the light projection lens 16.

In general, an illumination light source 11 used in a liquid crystal projector includes a lamp 11a and a parabolic reflector 11b as shown in FIG. 7 (or a concave lens as shown in FIG. 8). 11c), the light emitted from the lamp 11a is reflected by the parabolic reflector 11b (in the case of FIG. 8, the direction of the light reflected in the convergent direction by the parabolic reflector 11b). Is refracted by the concave lens 11c), and is emitted as parallel rays. As the lamp 11a, a discharge lamp such as an ultra-high pressure mercury lamp and a metal halide lamp is used. Among them, the ultra-high pressure mercury lamp is widely used because of its high luminous efficiency and utilization efficiency.

In addition, the liquid crystal projector 10 has a so-called fly-eye integrator having a thin convex shape provided between the illumination light source 11 and the dichroic mirror 12 and a polarizing beam splitter. A P / S combiner (not shown) is provided to efficiently and uniformly light the light from the light source, and to guide the light to the liquid crystal panel with the polarization direction aligned in one direction.

[0009] Furthermore, as shown in FIGS. 9 (a) and 9 (b), the projector device is of a type using a DMD which is a reflection type optical modulator formed by integrating a micro mirror on a semiconductor chip. There is also a projector (DMD projector). The DMD projector shown in FIG. 9A includes an illumination light source 11, a color dividing member 31 constituted by a color wheel and the like, an integrator rod 32, a DMD 33, and a light projecting lens 16; The light from the light source is time-divided into, for example, three primary colors of RGB via the color dividing member 31, and after passing through the integrator rod 32, the angle of the micro mirror of the DMD 33 is changed in a time-division manner, so that The light is reflected toward the screen and projected on a screen (not shown). Further, the DMD projector shown in FIG. 9B has a dedicated DMD 33 for each color without providing a color dividing member 31 such as a color wheel, reflects light toward the light projecting lens 16, and displays the light on a screen not shown. It is configured to project light to a high light efficiency and high image quality. As the illumination light source 11 used in the DMD projector, a discharge lamp such as a metal halide lamp, an ultra-high pressure mercury lamp, or a xenon lamp is used.

[0007]

[Problems to be solved by the invention]

 By the way, generally, an image display device used for a projector device such as a liquid crystal panel or a DMD is standardized in a landscape orientation such as 3: 4 or 9:16, and when emitted from the projector device, The image of the image display device is projected horizontally on the screen. For this reason, when the observation target in an image displayed on an image display device such as a liquid crystal panel or a DMD is vertically long, and when projected on a screen, as shown in FIG. There is a lot of useless area on the side.

In order to efficiently project a vertically long observation object on a screen with less useless space, a method of rotating the projector by 90 degrees can be considered. However, in general, since a projector uses a discharge lamp such as an ultra-high pressure mercury lamp as a light source for illumination in a stable state, for example, the reaction direction of mercury inside the ultra-mercury lamp to a temperature change is fixed. There are restrictions on the arrangement of discharge lamps used as light sources for horizontal and vertical directions, such as the need to maintain them and to limit the heat radiation position in order to make effective use of the space inside the device. The projector cannot be used by rotating the orientation of the projector itself by 90 ° or 270 °.

In addition, as other methods, there is a method of electrically performing vertical / horizontal conversion processing of an image before inputting image information captured by an imaging device to a projector, and a method of performing vertical / horizontal orientation when capturing an image with the imaging device. Can be considered by changing the image in advance. By using these methods, it is possible to project efficiently by minimizing wasted space in the screen. However, when these methods are used, as shown in FIG. 11, an image in a state of lying on the screen 18 is projected. For this reason, in order to observe as an erect image, the observer must be in a state of lying down sideways, and the observation posture is unreasonable.

A problem example of such a projector device will be specifically described. FIG. 12 is a schematic configuration diagram of a conventional batting practice device using a liquid crystal projector. FIG. 13 is a state explanatory view showing an image of the liquid crystal panel projected on the screen in the batting practice apparatus of FIG. In the figure, E indicates a trainee's pupil. The batting practice device 20 includes a liquid crystal projector 10 that projects an image of a pitching form in front of the pitcher captured by an imaging device or the like, a transmissive screen 18 that projects an image emitted from the liquid crystal projector 10, and a screen 18. A throwing machine 22 that shoots a baseball 21 from a nearby position B where the projected pitcher releases the baseball, and a hitting area 23 for hitting the baseball 21 that is shot from the throwing machine 22 with a bat. And a protection net 24 for preventing the baseball ball 21 fired by the pitching machine 22 or hit with a bat from colliding and jumping out.

The screen 18 has a size of about 2 m in height and about 1.32 m in width. The screen 18 has an opening 19 at a position B near where the projected pitcher releases the baseball, through which the baseball can pass. The pitching machine 22 fires a baseball through an arm 22a so that the baseball 21 passes through the opening 19 of the screen 18 and passes over a home base 25 provided in a hitting area 23. Has been adjusted. The pitching machine 22 is provided with a control device (not shown) for controlling the firing timing so as to fire the baseball ball 21 in synchronization with the pitching operation of the pitcher projected on the screen 18. ing. In addition, the pitching machine 22 can shoot a baseball by controlling the ball type, speed, up / down / left / right course, etc. of the pitch such as curves and shoots by the control device (not shown). It has become. Note that the pitching machine 22 is arranged at a position where the practice screen stand 18 does not project as much as possible on the transmission type screen 18 from a trainee standing in the hitting area.

The defense net 24 prevents the baseball 21 from colliding with a person or a machine, such as around the batting practice device 20 and in front of the screen 18, and prevents the baseball 21 from jumping out. It is located in a position that serves as a defense.

The position of the liquid crystal projector 10 is adjusted so that the optical axis of the projection light matches the eyes of the trainee standing on the batter box 26. Further, the liquid crystal projector 10 is arranged at a position where the shadow of the pitching machine 22 is not reflected on the screen 18 when the liquid crystal projector 10 is projected on the screen 18. In that case, it is ideal that the liquid crystal projector 10 is arranged so that the light projection surface faces the screen 18. However, if there is no space for collecting the hit baseball balls (not shown), or if it is difficult to take back space due to the design, the projector is projected obliquely onto the screen 18. Keystone correction processing is performed on the image information captured by the imaging device in advance so that the image projected obliquely on the screen 18 does not cause keystone distortion. The image is displayed on the liquid crystal panel of the liquid crystal projector 10.

The pitching machine 22 and the liquid crystal projector 10 determine whether the pitcher projected on the screen 18 is a right pitcher or a left pitcher, whether the pitching machine 22 is for a right pitcher or a left pitcher. Furthermore, the placement position differs depending on whether the batting practice device is intended for a right batter or a left batter. FIG. 12 shows an arrangement in which the pitcher projected on the screen 18 is a right pitcher, the pitching machine 22 is for a right pitcher, and the hitting area 23 is a batting training device dedicated to a right batter.

When performing batting practice in such a batting practice apparatus, the trainee stands with his / her batting in the right batter's batter box 26 located on the left side of the home base 25. On the other hand, the pitching action of the pitcher is projected on the screen 18, and the baseball 21 is shot from the pitching machine 22 in synchronization with the release of the pitch projected on the screen 18. Therefore, the practicer hits the baseball 21 with a batting, so that the batting practice can be performed in a state where the pitcher has thrown the ball.

In such a batting practice apparatus, the pitcher projected on the screen 18 is vertically long when viewed as an erect image, but the liquid crystal panel of the liquid crystal projector is horizontally long as described above, so that it is projected on the screen 18. There are many useless areas on the left and right in the image area R to be obtained, and the image of the pitcher becomes small. The size of the image of the pitcher projected on the screen of such a conventional batting practice device is desired to be as large as the actual size of the pitcher in order to increase realism. Was.

However, as described above, the orientation of the liquid crystal projector itself cannot be changed due to the problem of the arrangement of the discharge lamp used as the illumination light source. Also, even if the image is vertically and horizontally converted before being input to the liquid crystal projector, the image will be projected on the screen as if the pitcher is lying horizontally and pitching. Not suitable for batting practice.

Also, if the left and right areas in the image area R projected on the screen are not taken into consideration, the image of the pitcher can be enlarged by enlarging the projected image. The image becomes coarse and dark, which is not practical. Furthermore, in order to enlarge the projected image, it is necessary to increase the distance of the optical path from the projection lens of the liquid crystal projector to the screen, but the installation of the back space etc. is limited as much as possible. It is often difficult to maintain such a distance due to space design.

Therefore, in the batting training apparatus, when a conventional projector is used as it is and projected on a screen, a vertically long observation object in an image area displayed on an image display device such as a liquid crystal panel can be efficiently used. It could not be projected on a screen with the size and brightness.

Accordingly, the present invention provides a vertical-to-horizontal conversion method capable of projecting a vertically long observation object in an image area displayed on an image display device of a projector device on a screen with an efficient size and brightness. It is intended to provide a device.

[0021]

[Means for Solving the Problems]

 The projection image aspect conversion device according to the present invention is for projecting an image of an image display device emitted from a projector device having a light source for illumination, an image display device, and a projection lens onto a screen by changing the length and width of the image. A projection image vertical / horizontal conversion device, wherein an optical axis direction of light emitted from the projection lens is perpendicular to a first direction, the first direction, and horizontal to an installation surface of the projector device. When the direction perpendicular to both the first direction and the second direction is the third direction, the first direction is defined as the first direction in the optical path from the light projecting lens to the screen. A first reflection surface inclined at a predetermined angle with respect to the third direction and along the second direction, and a first reflection surface inclined at a predetermined angle with respect to the second and third directions; And a second reflecting surface along the direction of An image displayed on the image display device is projected on a screen surface by changing the vertical and horizontal directions by reflecting light emitted from the light projecting lens on the first and second reflecting surfaces. .

In the projection image vertical / horizontal conversion device according to the present invention, preferably, the first and second reflection surfaces and the light emitted from the light projection lens surface of the projector device are transmitted to the first reflection surface. A first opening for allowing light to enter the screen and a second opening for allowing light reflected by the second reflecting surface to be projected onto the screen. And a base on which the projector is placed and on which the projector is mounted.

[0023] In addition, the projection image aspect conversion device according to the present invention preferably includes the projector device that projects a pitch form image in front of the pitcher, the screen that projects an image emitted from the projector device, A pitching machine that fires a baseball from a position near where the pitcher projected on the screen releases the baseball, a hitting area for hitting a baseball thrown from the throwing machine with a bat, and a throwing machine. In a batting practice device having a protection net for preventing a baseball ball fired or hit with a bat from colliding and jumping out, a light reaching the screen from the light projecting lens of the projector device. The first and second reflecting surfaces are arranged in a road, and the reflecting surfaces are turned over from the projector device. The pitch form image ejected in the state is changed to an erect state and projected on the screen.

[0024]

[Embodiment of the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First Embodiment FIG. 1 is a schematic perspective view showing a projection image aspect conversion device of a first embodiment according to the present invention, FIG. 2 is an explanatory view of the principle of the projection image aspect conversion device of the embodiment, and FIG. FIG. 2 is an explanatory diagram of a state when the first reflecting surface is viewed from the side of the liquid crystal projector, and FIG. 2B is an explanatory diagram of a state when the first reflecting surface is viewed from the back side of the liquid crystal projector. FIGS. 3A and 3B are diagrams showing an image conversion state by the projection image vertical / horizontal conversion device of the present embodiment, wherein FIG. 3A shows an image displayed on a liquid crystal panel, and FIG. The image when reflected by the first reflecting surface, viewed from a plane perpendicular to the optical path leading to the reflecting surface, and (c), when viewed from the screen surface, are the images when reflected by the second reflecting surface.

The liquid crystal projector used in the projection image vertical / horizontal conversion device of each embodiment according to the present invention is a liquid crystal projector described with reference to FIG. 6 or a DMD projector using a DMD as described with reference to FIGS. In addition, an illumination light source using a discharge lamp such as a metal halide lamp or an ultra-high pressure mercury lamp, an image display device, and a light projection lens are provided. Any device that is configured to project onto a screen via a lens can be applied. Therefore, the projector in the following description of the embodiment corresponds to all of the above projectors. In the description of each embodiment, a liquid crystal projector having a liquid crystal projector liquid crystal panel is used as the projector device. Also, the direction of the optical axis of the light emitted from the light projecting lens 16 of the liquid crystal projector 10 arranged as shown in FIG. The second direction (arrow X) is perpendicular to the installation surface of the liquid crystal projector, and the third direction is perpendicular to both the first direction and the second direction. (Arrow Y).

As shown in FIG. 1, the projection image aspect conversion device 1 according to the present embodiment emits light from the first reflection surface 2, the second reflection surface 3, and the light projection lens 16 of the liquid crystal projector 10. The first opening 4 for allowing the reflected light to enter the first reflecting surface 2 and the light reflected by the second reflecting surface 3 are projected on a screen omitted in FIG. Body portion 6 having a second opening 5 for allowing the liquid crystal projector 10 to be mounted, and holding the body portion 6 with an adhesive, screws, or the like (not shown). And a base 7 to be placed.

The first reflecting surface 2 is constituted by a mirror surface, and in the optical path from the light projecting lens 16 to a screen (omitted in the drawing), the first and third directions (Z direction and Y direction). Direction) and a predetermined angle with respect to the second direction (X direction). The second reflecting surface 3 is formed of a mirror surface, is inclined at a predetermined angle with respect to the second and third directions (X direction and Y direction), and is in the first direction (Z direction). It is arranged along.

Then, as shown in FIG. 1, when the liquid crystal projector 10 is placed on the base 7, the light emitted from the light projecting lens 16 passes through the first opening 4, and 2), the image displayed on the liquid crystal panel is reflected in the vertical and horizontal directions by reflecting on the first reflecting surface 2 and further reflecting on the second reflecting surface 3 as shown in FIG. 2 (b). The projection is changed on the screen 18. For example, when the image displayed on the liquid crystal panel is as shown in FIG. 3A, the image is converted by being reflected by the first reflecting surface 2 as shown in FIG. By being reflected by the second reflecting surface 3, the image is converted as shown in FIG. When the image is reflected by the inclined reflecting surface, trapezoidal distortion, that is, so-called keystone distortion occurs in the image. However, the liquid crystal projector 10 used in the present invention is configured to electrically perform the keystone correction. By connecting to known keystone correction processing means (not shown), keystone distortion can be corrected. In addition, in the present embodiment, the liquid crystal projector 10 and the projected image vertical / horizontal conversion device 1 are configured to prevent the shadow of the pitching machine 22 from being reflected on the screen 18 when the liquid crystal projector 10 projects the image onto the screen 18. The position is adjusted so that the image is projected obliquely to the screen 18, and the image projected obliquely to the screen 18 is provided via keystone correction processing means (not shown) or the like so that the image becomes undistorted. Has been adjusted.

According to the projection image conversion apparatus of the present embodiment configured as described above, the image displayed on the liquid crystal panel is converted in the vertical and horizontal directions (that is, rotated by 90 ° or 270 °). ) Displayed on the screen. For this reason, the vertically long observation target object is projected horizontally on the screen as it is, which may be inconvenient for observation. Therefore, when the projection image display device of the present embodiment is used, the image data to be displayed on the liquid crystal panel and imaged by the image pickup device is subjected to a vertical / horizontal conversion process in advance via a vertical / horizontal conversion processing device. This may be performed beforehand, or when the image is taken by the image pickup apparatus, the image may be taken with the image pickup surface of the vertically long observation object set to be vertical. By doing so, a vertically long observation object is displayed in a horizontal state on the liquid crystal panel of the liquid crystal projector, and is raised vertically by the projection image vertical / horizontal conversion device of the present embodiment, so that it is displayed on the screen. A vertically long observation object is projected as an erect image.

As a method of displaying a vertically long observation object on the liquid crystal panel in a state of lying horizontally, the image is taken by aligning the longitudinal direction of the imaging surface with the longitudinal direction of the observation object (in this case, vertical). It is preferable to perform the vertical and horizontal conversion processing electrically. This is because the resolution tends to deteriorate depending on the number of pixels when performing the electrical conversion process.

When the optical path is bent by using a plurality of reflecting surfaces as in the projection image conversion device of the present embodiment, the distance from the light projection lens of the liquid crystal projector to the screen surface becomes longer. Can be taken. For this reason, according to the present embodiment, the liquid crystal projector itself does not have to be moved away from the screen in order to enlarge a vertically long image, as compared with a conventional general liquid crystal projector.

The effect of the present invention will be described more specifically using the above-mentioned batting practice device. Second Embodiment FIG. 4 is a schematic configuration diagram showing a state in which a projection image vertical / horizontal conversion device is used as a batting practice device as a second embodiment of the present invention, and FIGS. FIG. 4 is an explanatory view showing a state of an image of a liquid crystal panel projected on a screen in the backing training apparatus of the embodiment. In the batting practice device according to the present embodiment, the same reference numerals are given to the components as those of the conventional batting practice device shown in FIG. Further, description of members having the same configuration and operation as those of the conventional batting practice device will be omitted.

In the present embodiment, the projection video aspect conversion device 1 itself is configured in the same manner as in FIG. 1, and as shown in FIG. 4, an image from the second reflection surface 3 is projected on a screen. The second opening 5 is arranged so as to face the screen 18. The liquid crystal projector 10 is mounted on the base 7 of the projection image vertical / horizontal conversion device in the mode shown in FIG. 1 with the surface of the light projecting lens 16 oriented at 90 ° or 270 ° with respect to the surface of the screen 18. .

In the battering practice device 20 using the projected image aspect conversion device 1 of the present embodiment configured as described above, the light emitted from the light projecting lens 16 of the liquid crystal projector 10 receives the first opening 4 ( After being reflected by the first reflecting surface 2 through FIG. 1, the image of the liquid crystal panel is vertically and horizontally converted by being reflected by the second reflecting surface 3 (ie, rotated 90 ° or 270 °). Is projected on the screen 18).

Therefore, if the observation target is displayed on the liquid crystal panel of the liquid crystal projector 10 in advance in a laid state, the observation object in the laid state can be erected through the projection image vertical / horizontal conversion device 1. In this state, it can be projected on the screen 18. For this reason, according to the present embodiment, the image of the pitcher projected on the screen 18 is projected larger as shown in FIG. Reality can be obtained by reducing the size, and a bright image can be efficiently displayed in the image region R.

Further, according to the present embodiment, if the image area R is enlarged and projected on the screen 18 as shown in FIG. You can make it closer to the real thing. Moreover, in this case, according to the present embodiment, the optical path length can be increased by the first and second reflecting surfaces, and as shown in FIG. 4, the surface of the light projecting lens 16 of the liquid crystal projector 10 is a screen. It is not necessary to arrange it directly to the 18th surface. For this reason, according to the present embodiment, it is not necessary to keep a distance in the direction facing the screen 18 in order to gain an optical path for enlarging the image projected on the screen 18 as compared with the conventional case shown in FIG. It is also applicable to batting practice areas where back space is difficult.

As a method of displaying a vertically long observation object on the liquid crystal panel in a state of lying horizontally, the image is taken by aligning the longitudinal direction of the imaging surface with the longitudinal direction of the observation object (in this case, vertical). This method is preferable to the method of electrically performing vertical and horizontal conversion processing. This is because the resolution tends to deteriorate depending on the number of pixels when performing the electrical conversion process.

The above embodiments are merely examples, and a reflection member other than a mirror may be used for the first reflection surface and the second reflection surface. In addition, if the image displayed on the liquid crystal panel is projected on the screen in an upright state with the vertical and horizontal directions changed through these reflecting surfaces, the inclination angle of the first reflecting surface and The design of the inclination angle of the second reflection surface can be changed to any angle, and the first reflection surface and the second reflection surface are formed in the first direction to the second direction defined in the present invention. Any direction may be inclined with respect to the third direction.

Also, the batting practice device used in the present invention can be used for other types of pitching if the projection image conversion device of the present invention is arranged so that the orientation of the image on the liquid crystal panel is changed vertically and horizontally and projected on the screen. Machines, nets, hitting areas, etc. may be designed in any way. For example, as described above, a pitching machine is designed depending on whether the pitcher projected on the screen is a right pitcher or a left pitcher, and the batting training device determines whether the right batter or the left batter is trained. The position of the batter box may be designed depending on the target. In addition, as a pitching machine, a rotating rotor type as well as an arm type can be naturally applied. Further, the projection image aspect conversion device of the present invention is not limited to the batting practice device, and the orientation of the image displayed on the liquid crystal panel of the liquid crystal projector is changed to the aspect ratio (rotated by 90 ° or 270 °). It can be applied to any application where display on a screen is desired. In addition, the projection image aspect conversion device of the present invention is applicable not only to the case where an image displayed on a liquid crystal panel is projected to a transmission type screen but also to the case where an image displayed on a reflection type screen is projected.

[0040]

[Effect of the invention]

 As described above, according to the projection image vertical / horizontal conversion device of the present invention, a vertically long observation object in an image displayed on the image display device of the projector can be projected on the screen with an efficient size and brightness. it can. When the pitching image aspect conversion device of the present invention is used as a batting practice device, the pitcher's image is displayed in a size with reality and with good resolution and brightness without increasing the distance in the pitching direction. Can be done.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a projection image aspect conversion apparatus according to a first embodiment of the present invention;

FIGS. 2A and 2B are explanatory diagrams illustrating the principle of the projection image vertical / horizontal conversion device according to the present embodiment, in which FIG. 2A is a diagram illustrating a state when a first reflecting surface is viewed from a side, and FIG. It is a state explanatory view when it sees from the back side.

FIGS. 3A and 3B are diagrams showing an image conversion state by the projection image vertical / horizontal conversion device of the present embodiment, wherein FIG. 3A shows an image displayed on a liquid crystal panel, and FIG. The state of the transmission image reflected by the first reflection surface, as viewed on a plane perpendicular to the optical path to the reflection surface, and the state of the transmission image reflected by the second reflection surface, as viewed on the screen surface. Is shown.

FIG. 4 is a schematic configuration diagram showing a state in which a projection image vertical / horizontal conversion device is used as a batting practice device as a second embodiment of the present invention.

5 (a) is a state explanatory view showing an image of a liquid crystal panel projected on a screen in the batting training apparatus of the present embodiment shown in FIG. 4. FIG. (b) shows the image on the LCD panel.
(a) shows a state further enlarged and projected on a screen.

FIG. 6 is a schematic configuration diagram showing a conventional example of a liquid crystal projector.

FIG. 7 is a schematic configuration diagram illustrating an example of an illumination light source used in a liquid crystal projector.

FIG. 8 is a schematic configuration diagram illustrating another example of an illumination light source used in a liquid crystal projector.

9A and 9B are diagrams showing a conventional example of a DMD projector, in which FIG. 9A is a schematic configuration diagram of a DMD projector composed of one DMD, and FIG. 9B is a schematic diagram of a DMD projector composed of a plurality of DMDs. It is a block diagram.

FIG. 10 is an explanatory diagram of a state of an image projected on a screen when an observation target in an image displayed on a liquid crystal panel is vertically long.

FIG. 11 is an explanatory diagram of a state of an image projected on a screen when a vertically long observation object is displayed horizontally on a liquid crystal panel.

FIG. 12 is a schematic configuration diagram of a conventional batting practice device using a liquid crystal projector.

13 is an explanatory diagram showing a state of an image of a liquid crystal panel projected on a screen in the batting practice apparatus of FIG. 12;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Projection image conversion apparatus 2 1st reflection surface 3 2nd reflection surface 4 1st opening 5 2nd opening 6 Box part 7 Base 10 Liquid crystal projector 11 Illumination light source 11a Lamp 11b Parabolic reflector 11c Concave lens 12a, 12b Dichroic mirror 13a, 13b, 13c Condensing lens 14a, 14b, 14c Liquid crystal panel 15 Cross prism 16 Light projecting lens 17b, 17c Lens 18 Screen 20 Batting practice device 21 Baseball ball 22 Throwing machine 22a Arm 23 Hitting Area 24 Defense net 25 Home base 26 Batter's box 31 Color wheel 32 Integrator rod 33 DMD (digital micromirror device) A Observation target B Proximity position to release baseball B E Trainee's pupil R Screen Image area projected on

Claims (3)

[Utility model registration claims] 1. A projection image vertical / horizontal conversion device for projecting an image of an image display device emitted from a projector device having an illumination light source, an image display device, and a light projection lens on a screen while changing the vertical and horizontal directions. The direction of the optical axis of the light emitted from the light projecting lens is a first direction, the direction perpendicular to the first direction and horizontal to the installation surface of the projector device is a second direction, The direction perpendicular to both the first direction and the second direction is the third direction.
In the optical path from the projection lens to the screen,
Inclined at a predetermined angle with respect to the first and third directions, and a first reflection surface along the second direction, and inclined at a predetermined angle with respect to the second and third directions; and The first
And a second reflecting surface along the direction of. The light emitted from the light projecting lens is reflected by the first and second reflecting surfaces to vertically and horizontally display an image displayed on the image display device. A vertical / horizontal image conversion device characterized by changing the direction and projecting on a screen surface. 2. A first reflecting surface and a first reflecting surface for allowing light emitted from the light projecting lens surface of the projector device to enter the first reflecting surface. And a box having a second opening for projecting the light reflected by the second reflection surface onto the screen, and installing the box. The projection image aspect conversion apparatus according to claim 1, further comprising a base on which the projector device is mounted. 3. The projector device for projecting a pitch form image in front of a pitcher, the screen for projecting an image emitted from the projector device, and a vicinity where the pitcher projected on the screen releases a baseball. From a position, a pitching machine that fires a baseball, a hitting area for hitting a baseball shot from the pitching machine with a bat, and a collision of a baseball shot or hit with a bat by the throwing machine. In a batting training apparatus having a defense net for preventing jumping to the outside, the first and second reflection surfaces are arranged in an optical path from the light projecting lens of the projector apparatus to the screen. The throwing form image ejected from the projector device in a sideways state is changed to an upright state, and The projection image aspect conversion apparatus according to claim 1 or 2, characterized in that so as to projection in over down.