JPH05165103A - Projection type display device - Google Patents

Abstract

PURPOSE:To eliminate the need of installing a projection type display device main body on a ceiling, to prevent the device main body from coming into a visual field and also to eliminate the limit of a viewing position. CONSTITUTION:Light L emitted upward from a projection type display device main body 12 and having video information is allowed to reflect ahead on a mirror 14 arranged above, and the video by the reflection light L having the video information is displayed on a reflection system screen 24 arranged ahead. Thus, the need of installing the projection type display device main body 12 on the ceiling is eliminated, and a special construction is unnecessary. Also, the projection type display device main body 12 is arranged behind a viewer, so that it is prevented from coming into the visual field, and also the light L reflected on the mirror 14 and having the video information passes over the head of the viewer, so that the limit of the viewing position is eliminated and the viewer can view at the optimum viewing position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type display device capable of displaying an image of light having image information on a screen on a large screen.

[0002]

2. Description of the Related Art Conventionally, a front projection display device for projecting light having image information on a large reflective screen has been used at home or in a company. It is widely used in homes for watching movies, and in companies for meetings and education.

A conventional projection display apparatus, particularly a front projection display apparatus, includes a projection display apparatus main body which includes a projection tube and emits light having image information to the front side, and a light having the emitted image information. And a reflective screen for receiving and reproducing an image.

Of the front projection type display device thus constructed, the main body of the projection type display device is usually placed on a floor or a table for use.

[0005]

However, when the projection type display apparatus main body is used by placing it on the floor or on a table, the position of the viewer is limited, and in many cases, the optimum viewing position (for example, the screen When the size is 80 to 100 inches, there is a problem that it cannot be viewed at a position 2 to 3 m away from the front of the screen.

In order to avoid this, when trying to view from the rear of the projection type display device main body, there is a problem that the projection type display device main body is hard to see in the visual field together with the image displayed on the screen. Occur. Also,
For example, the main body of the projection display device occupies the central position of the room, which causes a problem that it becomes an obstacle.

Therefore, in order to solve these problems,
A method of mounting the main body of the projection display apparatus on the ceiling and using it is generally adopted.

However, the method of mounting the main body of the projection display device on the ceiling requires a special construction because the main body of the projection display device is relatively large and heavy. Due to problems such as the above, large-scale construction is required, and not only is it costly, but there is also the problem that after installation, it cannot be moved.

The present invention has been made in view of the above problems, and it is not necessary to mount the main body of the projection display apparatus on the ceiling, so that the main body of the projection display apparatus does not enter the field of view and the viewing is performed. An object of the present invention is to provide a projection type display device in which the restriction on the position is eliminated.

[0010]

The projection type display device of the present invention is, for example, as shown in FIGS. 1A and 1B, a projection type display device main body 12 which emits light L having image information upward, and a projection type display device main body 12 arranged above. And a mirror 14 which reflects the light L having the image information emitted upward and which is arranged in the front,
And a reflective screen 24 for displaying an image by the light L having the image information reflected by the mirror 14.

[0011]

According to the projection type display device of the present invention, the light L having the image information emitted upward from the main body 12 of the projection type display device.
Is reflected forward by the mirror 14 disposed above, and an image by the light L having the reflected image information is displayed on the reflective screen 24 disposed in front.

Therefore, it is not necessary to attach the projection display apparatus main body 12 to the ceiling, and no special work is required. Further, since the projection display apparatus main body 12 is arranged behind the viewer, it does not enter the visual field, and the light L having the image information reflected by the mirror 14 is above the viewer's head. Since it passes through, the restriction on the viewing position is abolished and it is possible to view at the optimum viewing position.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the projection type display device of the present invention will be described below with reference to the drawings.

FIG. 1A is a side view showing the internal structure of a room to which an embodiment of the projection display apparatus of the present invention is applied. Figure 1B
FIG. 1B is a plan view of FIG. 1A.

1A and 1B, the room is formed by a floor 1, a rear wall 2, a front wall 3, side walls 4,5 and a ceiling (not shown). A window 6 is formed in the side wall 4, and a door 7 is attached to the side wall 5. The area of floor 1 is about 3.6m ×
It is about 4.5m.

At the center of the floor 1, a table 10 and a sofa 11 (not shown) on which a viewer sits are arranged. A learning type infrared remote controller 21 (see FIG. 2) is placed on the table 10. The projection display apparatus main body 12 is placed in the center of the floor surface on the rear wall 2 side. A telescopic rod 13 is attached to the projection display apparatus main body 12, and a mirror 14 is attached to the tip portion of the rod 13, that is, above the projection display apparatus main body 12. The installation height of the mirror 14 is, for example, 1.8 m.

At the center of the floor on the front wall 3 side, an AV (audio
A visual rack 15 is arranged, and a 34-inch television receiver (hereinafter referred to as TV) 16 is placed on the AV rack 15. The AV rack 15 has a VTR, a control device, and the like (not shown) built therein.

Speakers 17 and 18 connected to the control device are arranged on the side walls 4 and 5 on the front wall 3 side, and a movable infrared receiver 19 (see FIG. 3) is mounted on the speaker 18.
Are arranged.

A screen stand 22 (see FIG. 4) is arranged between the speakers 17 and 18 and the AV rack 15. The screen stand 22 has a screen accommodating portion 23 in which a motor, an infrared ray receiving portion, and a control portion (not shown) are installed, and a reflective screen 24 accommodated in the screen accommodating portion 23 and pulled out when necessary. Is attached. The reflective screen 24
Is operated by the infrared remote controller 21 and is electrically operated by arrow D.
It is configured to move up and down.

Further, the arm 2 of the screen stand 22
By adjusting the length of 5, the distance from the front wall 3 to the reflective screen 24 can be adjusted. Further, the height of the floor surface of the reflective screen 24 can be adjusted by adjusting the length of the leg 27 fixed to the pedestal 26. The length of the arm 25 and the leg 27 can be adjusted electrically by the infrared remote controller 21.

A video signal line, an audio signal line, a control communication line from the TV 16 and the VTR (not shown) and the like, and an output line of the infrared receiver 19 are A
It is electrically connected to the control device (not shown) arranged in the V rack 15. This control device is also connected to the speakers 17 and 18 through an audio signal line.

The control device and the projection type display device main body 12 are electrically connected by a video signal line and a communication line. This connection may be made via a so-called home bus. By connecting in this manner, a viewer (not shown) can control not only the TV 16 and the like but also the projection display apparatus main body 12 by the infrared remote controller 21.

FIG. 5A is a front view showing a detailed structure of the projection type display apparatus main body 12 in the projection type display apparatus according to the present embodiment shown in FIG. 5B is a side view of FIG. 5A.

The projection type display device main body 12 is a caster 2
There is a projection tube housing 31 in a housing 30 to which 9 is attached. A zoom lens housing 34 is arranged on the upper surface of the projection tube housing 31. This zoom lens housing 34
The operation of the zoom lens (not shown) therein is controlled by the zoom motor 35. The zoom motor 35 is also controlled by the infrared remote controller 21 through the infrared receiver 19. Although FIG. 5 illustrates the single-tube type projection display device main body 12, the present invention is not limited to the single-tube type, and may be a three-tube type in which red, blue, and green single-color projection tubes are arranged in parallel. In the case of the three-tube type, three zoom lenses are attached.

A mirror shift-up mechanism section 36 is arranged at the bottom of the housing 30. A telescopic rod 13 is attached to the mirror shift-up mechanism portion 36, and a mirror 14 is attached to the tip end portion of the rod 13 through a mirror rotation mechanism portion 37 having a motor.

A double-sided lid 38 is attached to the upper surface of the housing 30 via a lid opening mechanism section (not shown). The lid opening mechanism section and the mirror shift-up mechanism section 36 (not shown)
The operation of the mirror rotation mechanism section 37 is controlled by the infrared remote controller 21 through the infrared receiver 19 described above.

Therefore, when the mirror shift-up command is issued from the infrared remote controller 21, the lid 38 is opened by the lid opening mechanism section, and then the rod 13 is erected in the arrow E direction by the mirror shift-up mechanism section 36.
Then, by extending the rod 13, the mirror 14 is taken out from the housing 30 and arranged above. The mirror 14 is moved by the operation of the mirror rotation mechanism 37 so that the arrow F
It can be rotated by a predetermined angle in any direction. When the projection display apparatus main body 12 is not used, the rod 13 is contracted so that the mirror 14 is housed in the housing 30.

It should be noted that the mirror 14 may not be integrated with the projection display apparatus main body 12 but may be constructed separately. Mirror 1
4 is mounted above the ceiling or the like, since the mirror 14 itself is relatively light and small, it is compared to mounting the projection display apparatus main body 12 on the ceiling as described in the section of the prior art. Because it is extremely easy.

FIG. 6 shows a state in which the front door 40 of the housing 30 is opened, and the housing 30 is constructed so that the projection tube accommodating portion 31 can be taken in and out. The projection tube housing 31
A projection lens 41 is fitted on the upper surface of the projection lens 41. When the projection tube housing 31 is housed inside the housing 30, the projection lens 41 and the zoom lens housing 3 described above are mounted.
The optical axis of the zoom lens (not shown) housed in the lens 4 is aligned. The optical axis is almost vertical.

With the above-described structure, when a viewer (not shown) sitting on the sofa 11 turns on the power of the projection type display apparatus main body 12 by the infrared remote control 21, the mirror 14 is moved to the projection type display apparatus main body 12. Is automatically raised in the direction of arrow G from. In this case, the position and the tilt angle of the mirror 14 are automatically set to the predetermined position and the tilt angle which are designated in advance. On the other hand, the reflective screen 24 is automatically lowered from the screen accommodating portion 23 and brought into the state of FIG. 1A.

In this state, the projection display apparatus main body 1
Light L having image information is emitted upward from the second projection tube housing 31. The light L having the image information is reflected by the mirror 14 which is tilted upward by a predetermined angle and is turned to the front.

The light L having the image information reflected and changed in direction by the mirror 14 is projected onto the reflection type screen 24 over the viewer's head (not shown), and the image projected on the reflection type screen 24. Light L with information
Image is displayed. In this embodiment, the size of the video display screen is 100 inches.

In addition, when the optical path length from the projection type display device main body 12 to the reflective screen 24 is changed, such as when the reflective screen 24 is moved, the infrared remote control 21 stores the zoom lens in the zoom lens housing portion 34. You can change the magnification of the zoom lens. Also, the focus position by a focus lens (not shown) can be changed electrically.

As described above, according to the above-described embodiment, the light L having the image information emitted upward from the projection type display device main body 12 is reflected forward by the mirror 14 arranged above through the rod 13. The image by the light L having the reflected image information is displayed on the reflective screen 24 arranged in front.

Therefore, it is not necessary to mount the projection display apparatus main body 12 on the ceiling, and the construction cost for that purpose does not occur. Further, since the projection display apparatus main body 12 can be moved by the casters 29, it is easy to change the layout of the projection display apparatus. Further, since the projection display apparatus main body 12 is arranged behind the viewer, it does not enter the visual field, and the light L having the image information reflected by the mirror 14 is above the viewer's head. Since it passes through, the restriction on the viewing position is abolished and it is possible to view at the optimum viewing position. Moreover, since the projection display apparatus main body 12 can be arranged near the wall surface instead of in the center of the room, the floor space can be effectively used. Since the restriction on the viewing position can be removed, the number of viewers can be increased. The viewer can watch the movie while sitting, standing or walking.

In the above-mentioned embodiment, an example in which it is installed in a room at home has been described, but the invention is not limited to this, and it can be installed in a school, a company, or even an aircraft. .. When installed in an aircraft, a liquid crystal display device can be used instead of the projection tube housed in the projection display device body 12 to further reduce the size and weight.

Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

[0038]

As described above, according to the projection display device of the present invention, the light having the image information emitted upward from the main body of the projection display device is reflected forward by the mirror arranged above. Thus, the image by the light having the reflected image information is displayed on the reflection type screen arranged in the front.

Therefore, it is not necessary to mount the main body of the projection display apparatus on the ceiling, and no special work is required.
Further, since the projection display apparatus main body is arranged behind the viewer, it does not enter the visual field. Further, since the light having the image information reflected by the mirror passes above the viewer's head, there is an effect that the restriction of the viewing position is removed and the viewer can watch at the optimum viewing position.

[Brief description of drawings]

FIG. 1A is a diagram showing a side surface configuration of a room in which an embodiment of a projection display apparatus according to the present invention is installed. B is a diagram showing a planar configuration of the room shown in A.

FIG. 2 is a perspective view showing an external configuration of an infrared remote controller that constitutes the projection display apparatus according to the present embodiment.

FIG. 3 is a perspective view showing an external configuration of an infrared light receiver that constitutes the projection display apparatus according to the present embodiment.

FIG. 4 is a perspective view showing an external configuration of a screen stand that constitutes the projection display apparatus according to the present embodiment.

FIG. 5A is a diagram showing a front configuration of a main body of the projection display apparatus of the projection display apparatus according to the present embodiment. B is A
FIG. 3 is a diagram showing a side surface configuration of the projection display apparatus main body shown in FIG.

6 is a perspective view showing a configuration of a housing and a projection tube accommodating portion of the projection display apparatus main body shown in FIG.

[Explanation of symbols]

 12 Projection Display Device Main Body 14 Mirror 24 Reflective Screen L Light with Image Information

Claims (1)

[Claims] 1. A projection display apparatus main body which emits light having image information upward, a mirror which is arranged above and reflects forward the light having image information emitted above said front, and a mirror which is arranged forward. And a reflective screen for displaying an image by light having image information reflected by the mirror.