JPH10312028A - Concave screen back projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a picture having sufficient reality and power, especially, a moving picture by constituting a display device of a concave screen having smooth concave shape and a back picture projection device projecting the picture to the back surface of the concave screen. SOLUTION: The lower part of a device housing 30 is extended forward and the concave screen 10 having the concave shape is provided from the upper part to the lower part of the front. A projection tube 21 and a lens unit 22 mounted on the tube 21 which constitute a part of the back picture projection device 20 are installed in a corner part on the front side at the upper part inside the housing 30. A mirror 23 is provided to be opposed to the tube 21 and the unit 22 in the corner part near to the back surface at the lower part inside the housing 30. A circuit board 50 is packaged in space surrounded by the mirror 23 and the back surface plate and the bottom plate of the housing 30. This device is lower than a man in height and it is so compact that a user does not feel that it is large. It is positionally and naturally viewed even by the man in standing posture by turning the line of sight downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-projection display device, and more particularly to a rear-projection display device having a concave screen. It is intended to provide a display device suitable for use in the present invention.

[0002]

2. Description of the Related Art Conventionally, in a game machine provided with a moving picture display, the screen shape of the display is generally flat or slightly convex, and the screen display on the display increases the screen size. Efforts have been made to achieve in-focus, low distortion, and low aberration over the entire size of the screen. In other words, the conventional moving image display places emphasis on the image (software) to be projected.

[0003] As one of attempts to increase the sense of reality such as realism and power, as seen in golf play equipment,
There is also known an entertainment device that uses a rear-projection image display device provided with a large screen to provide a realistic and powerful image display.

[0004]

However, the above-mentioned prior art attempts to provide a realistic (real) and powerful image display by devising the image (software). However, it has not been possible to provide the user with sufficient image display (realism) and powerful image display. Also, conventional entertainment devices that employ large screens do not provide the user with a sufficient sense of unity with the screen, and are not satisfactory because of the lack of realism for the cost.

An object of the present invention is to provide a display device which has solved the above-mentioned conventional disadvantages.

A specific object of the present invention is to provide a display device capable of displaying a sufficiently realistic and powerful image, particularly such a moving image.

Another specific object of the present invention is to realize such an excellent image device as described above with a simple configuration and therefore at low cost.

Another specific object of the present invention is to provide a display device which consumes less power and is easy to maintain even with a large screen.

[0009]

The basic object of the present invention is to adopt a concave screen as a screen display taking into account the characteristics relating to the human visual field, Further, a rear image projection device is employed.

Specifically, in order to achieve the above object,
The rear projection display device according to the present invention includes a concave screen having a smooth concave shape when viewed from the front side, and a rear image projection device that projects an image on the back of the concave screen.

Further, in order to achieve another object, a concave screen rear projection type comprising a concave screen having a smooth concave shape as viewed from the front side and a rear image projecting device for projecting an image on the back of the concave screen. In the display device, the rear image projection device has an optical configuration for performing normal screen display on a non-concave screen.

Further, in order to achieve another object, a concave screen rear projection type comprising a concave screen having a smooth concave shape when viewed from the front side and a rear image projecting device for projecting an image on the back of the concave screen. In the display device, the rear image projection device includes a cathode ray tube image display device and a lens unit mounted on the cathode ray tube image display device.

Further, in order to achieve another object, a concave screen rear projection type comprising a concave screen having a smooth concave shape as viewed from the front side and a rear image projecting device for projecting an image on the back of the concave screen. In the display device, the rear image projection device includes a cathode ray tube image display device, a lens unit mounted on the cathode ray tube image display device, and a mirror positioned between the lens unit and the concave screen. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the concave screen rear projection display device according to the present invention will be described.

First, in the embodiment of the concave screen rear projection type display device according to the present invention, considering the characteristics relating to the human visual field, a screen display incorporating the characteristic is used as shown in FIG. A concave screen 10 having a shape is provided, and a rear image projection device 20 including a projection tube 21 and a lens unit 22 and a mirror 23 mounted on the projection tube 21 is provided inside a housing 30 supporting the concave screen 10. I have. Further, the relationship with the user positioning device 100 is specified.

Here, before describing the embodiment according to the present invention in detail, the relationship between the characteristics relating to the human visual field and the features of this embodiment will be described. First, regarding the relationship between the point of regard and the visual acuity, as shown in FIG. FIG.
(A) conceptually shows the gaze point and the eyesight around it. (A) As is clear from the figure, when the gazing point is set to 0 °, the visual acuity rapidly decreases as the angle increases on both sides, and specifically, decreases to 1/10 or less at a point opened by 30 °. . On the other hand, when an image is displayed on the concave screen by the rear projection display device, the focus is rapidly shifted as the angle increases from the center of the screen to both sides as in the case of the visual acuity as shown in FIG.

Also, the visual field is about 50 degrees and 70 degrees in the vertical direction with one eye, 60 degrees inward (nose side) and 100 degrees outward in the left and right direction.
As shown in FIG. 2, the visual field of both eyes is 200
It has a field of view that is slightly downward and slightly offset.

According to the basic features of this embodiment, FIG.
As shown in (a), a concave screen 10 having a smooth concave shape as viewed from the user (front side), and a rear image projection device 20 for projecting an image on the back of the concave screen 10
Are provided.

In the above description, by using the concave screen 10 having a concave shape as viewed from the user, FIG.
As shown by a row of arrows 10A of varying size (width and length) immediately beside the concave screen 10 of (a), the more the distance from the gazing point at the center of the concave screen 10 to the periphery, the more the image distortion and The focus blur (corresponding to the width of the arrow) and the movement speed (corresponding to the length of the arrow) are increased, so that a real image when moving at high speed can be effectively expressed. That is, the rear image projection device 20 generally projects an image on a flat screen with low focus and low distortion, as shown by a row of small arrows 10a in FIG. If it is used as it is as the rear image projection device 20 in the example, as shown in FIG. (B), the image on the concave screen 10 continuously increases in distortion toward the periphery,
As described with reference to FIG. 1 (a), a focus that matches the visual function of a person regarding the point of regard and the visual acuity can be naturally obtained.

As described above, according to the present embodiment, the concave screen 10 having a smooth concave shape as viewed from the user (front side), and the rear image projection device 20 for projecting an image on the rear surface of the concave screen 10 By using the above, it is possible to obtain an image effect such that the distortion of the image becomes larger from the gazing point at the central portion of the concave screen 10 to the peripheral portion without requiring software processing. In the case of photographing, it is only necessary to perform normal photographing with one camera, and no special device or device is required.

FIG. 3B is an image display example viewed from the front of the concave screen 10. In this example, when a video in the traveling direction is taken from a car, an airplane, or the like, the scene flows from the center to the periphery. This is in good agreement with the situation in which the image of the peripheral part has a higher flow rate (flow velocity) as the image is closer. Such an excellent operation and effect is achieved by a concave screen 10 having a smooth concave shape.
And a rear image projection device 20 for projecting an image on the rear surface of the concave screen 10. That is, in addition to the combination according to the present embodiment, possible combinations include: (1) a combination of a smooth concave-shaped concave screen and a front image projection device that projects an image on the front surface of the concave screen. Combination of a convex screen having a perfect convex shape and a rear image projecting device for projecting an image on the back of the convex screen (3) A smooth convex convex screen and a front image projection for projecting an image on the front of the convex screen There are three types of combinations: device combinations.

The above (1) and (2) do not have the effect that the flow of the image becomes faster as it goes around the screen as in the combination according to the present embodiment. Conversely, using this characteristic, you can view the image directly below from an airplane in flight.
This is suitable when the traveling direction is different from the image direction.

In the above (2) and (3), since the screen has a convex shape as viewed from the user, the image can be viewed only in a narrow range with a very limited viewing angle.
Software that uses images that rotate in the circumferential direction of the convex shape,
For example, it is suitable for video software such as shooting games.

Further, (1) using a front projection device,
In (3), as will be described later, since the shadow of the user is projected on the screen, an image utilizing this feature, for example, software that shoots a target that appears and hides the shadow of the user as an obstacle. Are suitable.

In the above (1) to (3), it is not possible to obtain a display device capable of displaying a moving image on a large image with sufficient realism and power, which is the object of the present embodiment. The combination of the concave screen 10 and the rear image projection device 20 that is optimal for this purpose, that is, a smooth concave concave surface 10 and the rear image projection device 20 that projects an image on the rear surface of the concave screen 10 are provided. A concave screen rear projection display device is employed.

The other combinations described above can be utilized for the above-described respective display devices to make use of their respective characteristics.

According to another feature of this embodiment, the concave screen 1 has a smooth concave shape when viewed from the user (front side).
0, a rear image projection device 20 for projecting an image on the back of the concave screen 10, and a user positioning device 10 for positioning a user in front of the concave screen 10.
0 is provided. The user positioning device 100 determines a use position and a posture that are located when the user uses the concave screen rear projection display device, and also determines a user's viewing angle with respect to the concave screen 10 and a vertical line of sight. Determine the angles (elevation and depression if the gaze is horizontal).

As shown in FIG. 4, the size of the concave screen 10 of the present invention is defined not by the area but by the angle range θ from the position of the user's eyes. That is, if the angle θ is the same, the image content that can be seen by the user even if the area is different, and the above-described visual field effect are the same. However, if the concave screen 10 becomes large, a plurality of users can view the screen simultaneously.

According to the present embodiment, the viewing angle θ is determined as shown in FIG.
As shown in the figure, the angle is selected to be at least 45 degrees, preferably about 120 degrees. This is determined from the fact that, as described above, the visual field of a human is generally about 50 degrees above a gaze line (a line of sight looking at a gaze point is referred to as tentatively) and about 70 degrees below. is there. As shown in FIG. 5, when the gazing line is a horizontal line, an appropriate viewing angle is a total of about 120 degrees, with an elevation angle θ _E = about 30 degrees and a depression angle θ _D = about 90 degrees.

On the other hand, the concave shape of the concave screen 10 is desirably a cylindrical shape as shown in a concave screen 10C in FIG. 5A, but a flat shape as shown in a concave screen 10N in FIG. 5B. The same effect can be obtained also on a surface having a shape in which a plurality of surfaces having different curvatures including are smoothly connected.

In the above, the significance of adopting the smooth concave shape is as follows. From the user's point of view, to realize the concave screen 10 having a concave shape, a flat screen composite type combining a plurality of flat screens is also conceivable. Distortion of the image becomes discontinuous, resulting in an unnatural moving image. In the present embodiment, since the concave screen 10 having a smooth concave shape is used, it is possible to display an image with a natural feeling in which the distortion, the movement, and the speed continuously change.

Hereinafter, the above and other features of the present invention will be specifically described with reference to the embodiments shown in the accompanying drawings.

First, a first embodiment, which is a basic embodiment of the display device according to the present invention, will be described with reference to FIGS. The first embodiment is a concave screen rear projection display device installed in a game center or the like. FIG. 6 is a side view of the concave screen rear projection display device shown with a perspective view of the inside, and FIG. 7 is an external perspective view, in which specific dimensions are shown in units of mm.
6 and 7, the bottom of the device housing 30 projects forward, and a concave screen 10 having a concave shape, which is a feature of the present embodiment, is provided from the upper front to the lower front. A projection tube 21, which is a part of the rear image projection device 20, and a lens unit 22 mounted on the projection tube 21 are installed in the upper front corner of the housing 30. A mirror 23 is provided in a lower corner of the inside of the housing 30 near the rear surface, facing the projection tube 21 and the lens unit 22. A circuit board 50 is mounted in a space surrounded by the mirror 23 and the back plate and bottom plate of the housing 30. Note that, as described later, the concave screen rear projection display device is provided with a speaker, an operation unit, a coin slot, and the like in addition to the above, but these are omitted in FIGS. 6 and 7. ing.

FIGS. 6 and 7 further exemplify main dimensions of the concave screen rear projection display device. According to this, the front width W of the device = 1116 mm, the bottom depth DF = 1269.3 mm, the top depth DHT =
675 mm, height H = 1344 mm, height HSC of the concave screen upper end HSC = 1344-390 = 954 mm, and the concave screen 10 has a cylindrical shape with a radius of curvature of 1000 mm. According to this dimensional system, the height H of the device
Is smaller than the height of an adult and compact in size. Further, the concave screen 10 is a position where even an adult in a standing posture can easily view the object if the eyes are dropped, and as shown in FIG. 2 and FIG. . In addition, the arrangement of the concave screen 10 is suitable for a human visual field even when sitting on a chair.

FIG. 8 is a block diagram of the control circuit. The display unit 20, the speaker 60, and the operation unit 70 described above are controlled by the control unit 50 including the storage unit 51 and the timer unit 52. The control unit 50 includes a power supply unit 40
When a predetermined amount of coins is inserted from the coin insertion slot 80 by the electric power supplied from the power supply, the operation state is set.
The speaker 60 is disposed in front of the housing 30 around the concave screen 10, for example, above the concave screen 10 so as to provide a user with a good sound effect together with the image. In addition, the control unit 50 and the power supply unit 40 are mounted inside the housing 30, for example, in a space surrounded by the mirror 23 and the back plate and the bottom plate of the housing 30, thereby improving the mounting efficiency of the housing 30. Let me. The operation unit 70 and the coin insertion slot 80 are separated from the housing 30 to form the user positioning device 20, and are provided at a predetermined position in front of the housing 30, for example, the most suitable image for the user. Place it where it gives the environment.

FIG. 9 shows an overall flow of the operation of the apparatus. When the power of the device is turned on (S01), the device enters a standby state and monitors the insertion of coins (S02).
Until a coin is inserted, a demonstration screen is displayed (S03). When a coin is inserted, the operation of the operation unit 70 is accepted, and the game is executed (S0).
4). When the game is out or the timer time has elapsed, the game is terminated, and if there is no power-off (S05), the demonstration screen is displayed again (S0).
3). When the power is turned off (S05), the device is turned off (S06).

FIG. 10 shows an optical relationship of a device layout as the rear projection device 20. The projection tube 21 and the lens unit 22 installed in the upper part of the apparatus and the projection tube 21 ′ and the lens unit 22 ′ indicated by broken lines have a mirror image relationship with each other with respect to the mirror 23. As is clear from FIG. 10, according to the apparatus layout according to the present embodiment, the position of the user's line of sight, the concave screen 10, and the projection tube 21 are optically placed in the best positional relationship,
Since the layout is compact, the required floor area of the device is small, and the dead space is small, a display device with a good space factor can be obtained.

As shown in FIG. 11, if the auxiliary projection tube 21A and the lens unit 22A are installed at the corner of the dead space near the upper back of the apparatus, the projection tube 21, the lens unit 22 and the The screen 1 passes through a path different from the image projection path of the mirror 23.
Since an auxiliary image such as a spot image can be superimposed and displayed directly on 0, various displays can be clearly performed without increasing the device size. The auxiliary projection tube 21A and the lens unit 22A are suitable for displaying a score display, guidance, or the like on the end side of the concave screen 10 that is out of focus.

As described above, according to the present embodiment, a rear image projection device including a projection tube 21 as a cathode ray tube image display device, a lens unit 22 and a mirror 23 is used as the rear image projection device 20. The lens unit 2
By arranging the projection tube 21 provided with 2 at the uppermost part of the display device and the mirror 23 at the lowermost corner, a compact display device having a small depth dimension can be obtained. Further, since the rear image projection device is used, the shadow of the user does not appear on a screen or the like, and spot display can be easily performed by the auxiliary rear image projection device.

The first embodiment described above is the most basic form, and the user's use position, that is, the user positioning device 100 is located in front of the concave screen 10 and outside the concave screen 10. Is the case. Hereinafter, more specific embodiments of the present invention will be described as examples in which the use position and posture of the user are different, and examples in which the present invention is applied to a racing game machine, a flying game machine, and a jogging game machine will be sequentially described. I do.

(Racing game machine) FIGS. 12 to 1
8 relates to an embodiment of a racing game machine. As shown in FIG. 12, according to the present embodiment, a driver seat device 100, which is a user positioning device, is disposed at the lower end 11 of the concave screen 10, and the side screens 1 are provided on both sides of the driver seat device 100.
1L and 11R are formed to extend. That is, in this embodiment, the center of the lower end of the concave screen 10 is cut out, and the driver seat device 100 is disposed in the cutout. Therefore, the user sits on the driver seat device 100 that has entered the concave screen 10.

FIGS. 13 and 14 are perspective side views of the racing game machine according to the present embodiment. Driver seat device 1
00 is the seat base 101 and the seat 10
2, upper operation display unit 103 and foot operation unit 104
It is composed of The seat 102 is provided with a chair driving device 107 shown in FIG. 18, and by moving the seat 102 over the seat base 101 via driving means (not shown), the operability of the user is improved. And the damage of the side screens 11L and 11R due to the user's sitting operation can be reduced. Of course, the movement of the seat 102 may be performed manually.

In FIG. 14, the driver seat device 100 is provided with another device for giving a sense of realism. The foot operation unit 104 has a function of an operation device of a display image and a role as an operation device of a blowing mechanism 106 of variable wind speed and air volume, and operates the foot operation unit 104 to quickly operate the display image. The air volume is increased or decreased according to the speed. The chair driving device 107 also operates to vibrate the seat 102 at the time of a collision via a driving unit (not shown). Further, the driver seat device 100 includes a speaker 105 for obtaining an acoustic effect.

Next, the operation flow will be described with reference to the operation flow of the racing game shown in FIGS. 13, 14 and 15 and the use state diagram of FIGS. 16 and 17.

First, in FIG. 13, before the game starts,
The seat 102 is pulled out from a position behind the seat base 101 (right side in the drawing), that is, from the screen 10 displaying the demonstration screen. Prior to the start of the game,
The chair swing device 107 is driven by sitting on the extracted seat 102 and inserting coins. The chair swinging device 107 moves the seat 102 on the seat base 101 to a predetermined position as shown in FIG. And game O in this state
The state becomes the N state.

While the chair driving device 107 is moving, guidance may be displayed on the concave screen 10 or guidance may be generated by the speaker 106 in consideration of safety.

In FIG. 15, when the racing game starts (S11), the display on the concave screen 10 is
For example, as shown in FIGS. 16 and 17 according to the progress of the game. The game proceeds by the user operating the upper operation display unit 103 and the foot operation unit 104 in accordance with the progress of the display on the screen 10 (S12).
At this time, as shown in FIG. 14, the blowing device is driven by the foot operation unit 104 to give a sense of realism. Also, on the screen, when the car that the user is driving collides with another car or a wall (S
13) While expressing the collision on the screen, the chair driving device 107 is driven to swing the seat 104 according to the size of the collision, and control such as reducing the speed is performed.
A sense of realism is given (S14). In addition, every time a predetermined check point can be passed (S15), the remaining time is increased and a score is added (S16) each time.

FIG. 16 shows an example of the screen display of the concave screen 10 during the progress of the game. At the top of the screen, the selected game, the current ranking, and the remaining time are displayed. A bird's-eye view video of the course is shown from the center to the bottom of the screen. The image projected on the concave screen 10 has the functions and effects described with reference to FIGS. FIG. 17 shows another example of the screen display during the progress of the game.
FIG. 3 is a perspective view showing a game situation when the auxiliary spot display described in FIG. 1 is used together. Concave screen 1 in FIG.
0, each time the game is run, surrounded by a dashed line,
In addition, the display portions requiring a certain degree of definition, that is, the score table SC, the console panel CP, etc., can be easily and legibly read by the user, independently of the main screen display, in a stable and clear manner. Can be provided with a simple display.

When the game time is over (S17), a display indicating the end of the game and a score are displayed on the screen (S18),
When the display time has elapsed (S19), the game ends (S20). In FIG. 13, the game is ended, and the seat 102 is the seat base 10.
Then, the user moves to a position behind (right side on the drawing) 1 and displays a demonstration screen from the guidance display.

FIG. 18 is a circuit block diagram of the control device of the racing game machine shown in FIG. 17. In contrast to the configuration of the basic system shown in FIG. 8, the sub display device 21A for spot display shown in FIG. Further, a blower 106 for increasing the sense of speed and a sense of running shown in FIG. 14 and a chair swinging device 107 are additionally provided.

According to this embodiment, the concave screen 1
A racing game machine is provided in which the end near the user 0 is located behind the tip of the user positioning device 100. As a result, the concave screen 10 is positioned around the user's feet, and the sense of presence, unity, and power are significantly increased. In particular, the user positioning device 10
0 is closer to the concave screen 10 and positioned so as to be located in the space immediately before the concave screen 10.
The image of the user's body overlaps with the image, and the sense of presence is further increased.

(Flying Game Machine) FIG. 19 and FIG.
A perspective view showing a state of a flight and landing game in which a user rides on a user positioning device 100 capable of moving above the concave screen 10 and competes for landing time and accuracy, aiming at a landing target TG, and It is a side view. Seat seat 10 of user positioning device 100
2 may be supported and moved by an arm 110 as shown in FIG. 20, and the user positioning device 100 may be suspended and supported by a support member 120 as shown in the embodiment of FIG. You may make it. Which of the user positioning devices 100 shown in FIG. 20 and FIG. 21 is adopted depends on the type of the game and the like.

The display device provided with the concave screen 10 has the same basic form as that of the first embodiment (see FIG. 6), but the second embodiment (see FIG. 12).
The operation and effect of the present invention can be obtained. Moreover, according to this embodiment, the concave screen 10 can be arranged below the lower limb while simplifying the structure of the display device, so that a more realistic feeling can be provided.

Further, the user positioning device 100 of this embodiment is similar to that of the second embodiment (FIG. 12).
Similarly to FIG. 18), an upper operation display unit 103 and a chair driving device 107 shown in FIG. 18 are provided. The chair driving device 107 is connected to the seat 10 via a support member 120.
2 is moved out of the concave screen 10 to get on and off the user, and at the start of the game, the seat 102 is moved on the concave screen 10 to improve the getting on and off of the user and the operability. In addition, the damage of the concave screen 10 due to the user's sitting operation is reduced. Further, based on the operation of the upper operation display unit 103,
By driving the chair driving device 107 to move the seat 104 up and down, left and right, up and down, and tilt, a more realistic feeling can be obtained. A similar effect can be obtained by providing the seat 102 on the concave screen 10 movably with a ramp used when a user gets on and off the vehicle.

According to this embodiment, since the continuous concave screen 10 is formed from the front of the user to the lower limbs, the background in which the user is floating and the user's attention is directed downward from the front. A good rear image projection device is provided for assumed video software, for example, a flying game machine or an underwater game machine.

(Jogging game machine) FIGS. 22 and 2
3 is a perspective view and a side view of a jogging game machine embodying the present invention. This embodiment includes a belt-driven walking device 100 as a user positioning device,
On both sides thereof, a concave screen 10 is provided extending like the racing machine. Other structures are the same as those of the above-mentioned racing machine, and the description is omitted.

Various methods can be used for using the jogging game machine.
00 is jogged, or the speed of walking is detected by a detecting device (not shown) to control the speed of the image on the concave screen 10 or a pre-programmed image and a corresponding driving device (not shown) The simulation may be performed with the walking device 100 provided.

People who perform jogging or walking tend to look down from the front. In particular, if the degree of fatigue increases, the line of sight tends to face downward. In this embodiment, since the concave scoone 10 capable of supplying a moving image to the position of the user's eyes is provided, an extremely realistic realization experience can be obtained. In addition, this embodiment is not merely a game machine, and is used when walking training for a disabled person or an elderly person. It can be expected that training will last longer. Further, for example, while projecting a course image of a marathon, the rotation of the walking device 100 is increased in accordance with the slope of the course, and the like, which is suitable for sports training and the like. In this embodiment, such a wide field of application can be expected.

In the embodiment described above, a case where a large screen which is about the same size as the user or larger is used. As described with reference to FIG. 4, according to the principle of this embodiment,
Even a small screen located near the user,
If the same viewing angle can be secured, an image having the same content as a large screen can be provided. This embodiment will be described with reference to FIGS.

FIG. 24 is a schematic sectional view showing a desk type embodiment. In this embodiment, a concave screen rear projection display device having the same structure as that of the first embodiment is provided at the position of the table surface. In this embodiment, a chair 100 is set as a user positioning device, and the position and size of the concave screen 10 are set according to the eyes of a user sitting on the chair 100. Further, according to this embodiment, since the rear image projection device 20 is disposed above the housing 30, the projection below the concave screen 10 has the same positional relationship as that of the table, and the knee or the shoe is located below the projection. Since a sufficient space for inserting the tip can be obtained, the user can approach the concave screen 10 and position the eyes in the concave screen 10.

It is to be noted that the structure of the present embodiment may be formed on a table surface as a structure similar to that of the first embodiment in which the structure of the present embodiment is reduced in size. This provides a very compact portable concave screen rear projection display device. Further, the same operation and effect as described above can be obtained with a structure in which the rear image projection device 20 is arranged at the lower rear part of the housing 30, and the height of the device can be reduced according to this structure. Further, the user positioning device 100
The same effect can be obtained by adopting a size and a structure that can be performed in a standing posture.

FIG. 25 is a schematic sectional view showing an embodiment of a motorcycle type. In this embodiment, a concave screen rear projection type display device having the same structure as that of the first embodiment is provided at the position of the hood surface of the motorcycle. In this embodiment, a motorcycle 100 is set as a user positioning device, and the motorcycle 100
The position and size of the concave screen 10 are set in accordance with the eyes of the user sitting on the seat. In other words, in this embodiment, the motorcycle 100 itself (including a forged vehicle)
In addition, the concave screen 10 is arranged in accordance with the user's eyes. Therefore, in this embodiment, the operating device is also provided in accordance with the motorcycle 100. In addition, a drive unit is provided on the base of the motorcycle 100 (not shown) so that the motorcycle 100 is tilted or vibrated in accordance with the driving operation. In addition, air may be blown in accordance with the speed.

As described above, according to this embodiment, since the concave screen rear projection display device is provided according to the eyes of the user of the actual object to be experienced, the sense of reality can be further improved.

In each of the embodiments shown in FIGS. 24 and 25 described above, the concave screen 10 is located close to the face of the user, and the face of the user is slightly ahead of the lower end of the concave screen 10. It is located on both sides of the face on both sides of the lower edge of the screen. As a result, it is possible to see an image similar to actual vision, which is a feature of the present embodiment.

[0065]

As described above, according to the present invention,
By combining a concave screen with a concave shape that is smooth when viewed from the front (user) and a rear image projection device,
A display device that can display an image with a high sense of reality that matches the visual field characteristics of a human can be obtained.

Since a concave screen is used,
Images that are wider than the viewing angle of the user can be displayed,
There is an advantage that realism is great.

Further, since the rear image projection device is used, there is no possibility that the shadow of the user is reflected on the screen.

Further, it is easy to display a superimposed image by a plurality of rear image projection devices.

Furthermore, since the above-mentioned rear image projection device can be an ordinary one for a flat screen, an inexpensive and simple configuration display device can be obtained.

[Brief description of the drawings]

FIG. 1 is a characteristic curve diagram showing a human visual acuity characteristic and an image display device focus characteristic according to the present invention.

FIG. 2 is a curve diagram showing a human visual field range.

FIG. 3 is a side view (a) and a front view (b) illustrating the principle of the present invention.

FIG. 4 is an explanatory diagram of a relationship between a concave screen and a viewing angle in the present invention.

5A and 5B are a side view of a cylindrical concave screen and a side view of a non-cylindrical concave screen according to the present invention.

FIG. 6 is an internal perspective side view of the first embodiment.

FIG. 7 is a perspective view of the first embodiment.

FIG. 8 is a block diagram showing a circuit block configuration according to the first embodiment;

FIG. 9 is a flowchart showing the overall operation of the first embodiment.

FIG. 10 is an explanatory diagram of an optical relationship between components in the first embodiment.

FIG. 11 is an explanatory diagram of the optical relationship of each component of the example in which the auxiliary rear image projection device is used in the first embodiment.

FIG. 12 is a perspective view of an embodiment applied to a racing game machine.

FIG. 13 is a side view of the example of the embodiment in FIG. 12;

FIG. 14 is a side view of another example of the embodiment of FIG. 12;

FIG. 15 is a flowchart showing the operation of the embodiment applied to a racing game machine.

FIG. 16 is a front view showing an example of a screen display in the embodiment applied to a racing game machine.

FIG. 17 is a perspective view showing another example of the screen display in the embodiment applied to the racing game machine.

FIG. 18 is a block diagram showing a circuit block configuration of an embodiment applied to a racing game machine.

FIG. 19 is a perspective view of an embodiment applied to a flying game machine.

FIG. 20 is a side view of FIG. 19;

FIG. 21 is a side view of another example of the embodiment applied to a flying game machine.

FIG. 22 is a perspective view of an embodiment applied to a jogging game machine.

FIG. 23 is a side view of FIG. 22.

FIG. 24 is a side view showing a desk-type embodiment of the display device according to the present invention.

FIG. 25 is a side view showing an embodiment of a motorcycle of the display device according to the present invention.

[Explanation of symbols]

10: concave screen, 11: lower end of screen, 11
L, R: extending portion on both sides of lower end of screen, 20: rear image projection device, 21: cathode ray tube, 22: lens unit, 23
... mirror, 30 ... housing, 100 ... user positioning device

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takeshi Hoshino 1-280 Higashi Koigakubo, Kokubunji-shi, Tokyo Inside the Hitachi, Ltd.Design Research Laboratory (72) Koichi Umezawa 1-280 Higashi Koigabo, Kokubunji-shi, Tokyo (72) Inventor Tatsuo Murai 1-280 Higashi Koigakubo, Kokubunji-shi, Tokyo, Japan Inside Hitachi, Ltd.Design Research Laboratories (72) Ryoji Ito 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Japan (72) Inventor Shoji Uchiyama 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa

Claims (11)

[Claims] 1. A concave screen rear projection display device comprising: a concave screen having a smooth concave shape as viewed from the front side; and a rear image projecting device for projecting an image on the back of the concave screen. 2. A concave screen rear projection type display device comprising: a concave screen having a smooth concave shape when viewed from the front side; and a rear image projecting device for projecting an image on the back of the concave screen. The rear projection type display device having a concave screen, wherein the projection device has an optical configuration for performing normal screen display on the non-concave screen. 3. A concave screen rear projection display device comprising: a concave screen having a smooth concave shape as viewed from the front side; and a rear image projecting device for projecting an image on the back of the concave screen. The projection device comprises a cathode ray tube image display device and a lens unit mounted on the cathode ray tube image display device, wherein the rear projection type display device has a concave screen. 4. A concave screen rear projection display device comprising: a concave screen having a smooth concave shape as viewed from the front side; and a rear image projecting device for projecting an image on the back of the concave screen. The projection apparatus comprises a cathode ray tube image display device, a lens unit mounted on the cathode ray tube image display device, and a mirror positioned between the lens unit and the concave screen. Display device. 5. The rear projection type display device according to claim 1, wherein the surface shape of the concave screen is a columnar shape. 6. The rear projection type display device according to claim 1, further comprising a user positioning device in front of the concave screen. 7. A user positioning device is provided at the front center of the concave screen, and ends of the concave screen extend on both sides of the user positioning device. The concave screen rear projection type display device as described in the above. 8. A user positioning device is provided in front of the concave screen, and a viewing angle facing the concave screen from a position of a user's eyes determined by the user positioning device is in a range of approximately 45 degrees to 120 degrees. 5. The concave screen rear projection display device according to claim 1, wherein: 9. A user positioning device in front of the concave screen, wherein a viewing angle facing the concave screen from a position of a user's eyes determined by the user positioning device is approximately 120 degrees. The concave screen rear projection display device according to claim 1. 10. The concave screen has a columnar shape, is provided with a user positioning device in front of the concave screen, and faces the concave screen from the position of the user's eyes determined by the user positioning device. 5. The rear projection type display device according to claim 1, wherein a viewing angle is in a range of approximately 45 degrees to 120 degrees. 11. The concave screen has a columnar shape, a user positioning device is provided in front of the concave screen, and the concave screen faces the user from the position of the user's eyes determined by the user positioning device. 5. The concave screen rear projection display device according to claim 1, wherein a viewing angle is approximately 120 degrees.