JP2715978B2 - Screen integrated projection display - Google Patents

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, and more particularly to a screen integrated projection type display device having a screen.

[0002]

2. Description of the Related Art This type of screen-integrated projection display device is ready to increase the size and weight of an image as compared with a direct-view CRT display, and is in widespread demand.

FIG. 5 shows an example of a conventional screen-integrated projection display device. FIG. 1A is a perspective view, and FIG. 1B is a sectional view thereof. In the conventional screen-integrated projection display device, the image projected from the image projection device 1 disposed in the housing 21 is reflected by the mirror 6 fixed on the rear side of the housing 21 via the lens 2. And projected on the transmission screen 15.

However, this conventional screen-integrated display device has a problem that the screen size cannot be changed because the projection distance between the lens 2 and the transmission screen 15 is fixed. In addition, the transmission screen 15
Has a problem that it is easily scratched because it is exposed to the outside of the housing 21 as a product. Further, the size of the housing 21 becomes large under the influence of the size of the transmissive screen 15, and there is a problem that it becomes an obstacle in a room when not in use.

To solve such a conventional problem, Japanese Utility Model Laid-Open Publication No. Sho 56-108669 discloses an openable and closable top plate having a screen mounted on an inner surface thereof, and a housing and a housing formed of a desk with the top plate. There has been proposed a video projector which includes a built-in CRT projection optical system, and wherein the screen is a reflection screen of the CRT projection optical system.
Japanese Patent Application Laid-Open No. 62-214785 discloses that a projector is pivotally supported in a storage section opened in front of furniture so that the projector can be turned upside down. Furniture with a projector that stores the projector in the furniture when not in use has been proposed.

[0006]

Problems to be Solved by the Invention
According to the inventions described in JP-A-8669 and JP-A-62-214785, when the projector is not used, the projection function is stored in the main body, and the projector can be used as a desk or other furniture. Sometimes the screen surface is not exposed to the outside, so the damage to the screen is minimized, but the distance between the projector and the screen remains fixed, and the size of the projected screen can be changed There was a problem that can not be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a screen-integrated projection display device capable of displaying screens of different sizes by one video projection device.

[0008]

In order to achieve the above object, a screen-integrated projection display device according to the present invention comprises a top plate which can be turned upside down with respect to a housing, and a reflection type screen provided on an inner surface of the top plate. And a transmissive screen that is housed in the housing and stands on the top plate surface, an image projection device arranged in the housing toward the transmissive screen at the time of standing, and at the time of standing the top plate And a reflector positioned on the optical path of the video projector and projecting an image of the video projector on the reflective screen.

In this case, the transmissive screen is pivotally supported on the housing so as to be rotatable and protrudes and retracts from the opening formed on the top plate on the top plate surface, and is attached to and detached from the opening. By providing a free lid, a screen-integrated projection display device can be configured.

In the above configuration, the reflection mirror may be pivotally supported to a free end side of the transmission screen.

Further, it is also possible to adopt a structure in which the reflecting mirror or the reflecting mirror and the reflecting screen can be fixed at an arbitrary angle.

[0012]

With the above structure, the screen-integrated projection type display device of the present invention can be used when the transmission type screen is used by standing the screen on the top plate and projecting the image by the image projection device from the back surface. At the same time, when using a reflective screen, the reflective screen is exposed by erecting the top plate, and the reflecting mirror is rotated to be positioned on the optical path of the image projection device and directed toward the reflective screen. The image can be projected on the reflection type screen. Therefore, according to the present invention, a small transmission type screen and a large reflection type screen can be properly used for one video projection device according to the application.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are cross-sectional views according to an embodiment of the screen-integrated projection display device of the present invention, in which FIG. 1A shows a use state of a small screen transmission screen, and FIG. 1B shows a large screen reflection screen. FIG.
(A), (b) is a perspective view corresponding to FIG. 1 (a), (b), respectively.

In these figures, the screen-integrated projection display device basically has large and small openings 20a and 20
b, a table-like main body having a top plate 8 pivotally supported on a top surface, a video projection device 1, a transmission screen 3 for a small screen, and a reflection screen 7 for a large screen.
It is provided with.

The transmission screen for small screen 3 is housed in the housing 20 and stands up on the top plate surface. That is, the transmission screen for small screen 3 is supported by the reinforcing frame 12 rotatably attached to the housing 20 via the shaft portion 4, and when not in use, FIG.
As shown in FIG. 1B, it is accommodated in the opening 20a of the housing 20 and stands up when used, as shown in FIG. The upright state of the small screen transmission screen 3 is as follows.
It is maintained by the fixing fitting 5.

The opening 20a is provided with a detachable lid 14 to protect the screen surface of the small screen transmission screen 3 when not in use. Video projection device 1
Are arranged with their lens surfaces 2 facing the small screen transmission type screen 3 when standing up.

On the other hand, a large-screen reflective screen 7 is provided on the inner surface of the top plate 8 which can be turned upside down.
Is rotatably supported by the shaft 9 with respect to the housing 20. The large-screen reflective screen 7 is installed in an upright state toward the front of the housing 20, so that the large-screen reflective screen 7 can be used. The top plate 8 is maintained in an upright state by the fixing bracket 10, and easily bends by bending the fixing bracket 10, so that the large screen reflective screen 7 is housed in the housing 20.

In the drawing, reference numeral 6 denotes a reflecting mirror, which is a reinforcing plate 11.
Mounted on The reinforcing plate 11 is rotatably supported at the tip of a reinforcing frame 12 that supports the transmission screen 3 for small screen. The reflecting mirror 6 is located on the optical path of the image projection device 1 when the top plate 8 stands, and reflects and projects the image of the image projection device on the large-screen reflective screen 7. Further, on both sides of the reflecting mirror 6, fan-shaped support members 13 fixed to the reinforcing frame 12 are located. The fan-shaped support member 13 has a groove 13a formed circumferentially around a joint between the reinforcing plate 11 and the reinforcing frame 12, and the reinforcing plate 11, that is, the reflecting mirror 6 can be arbitrarily formed along the groove 13a. It is fixed to the position with screws or the like (not shown). Therefore, the reflecting mirror 6
Is capable of adjusting the angle within the range of the groove 13a,
The image can be aligned with the large-screen reflective screen 7.

Next, a procedure for using the screen-integrated projection display device having the above-described configuration will be described. 3A and 3B are a cross-sectional view and a perspective view, respectively, when the screen-integrated projection display device is not used. First, when viewing an image on a small screen, the lid 14 is removed from the unused state shown in FIG. 3, the reinforcing frame 12 is lifted, and the small screen transmission screen 3 is fixed with the fixing bracket 5. In this state, an image is projected from the image projection device 1 via the lens surface 2 onto the transmission screen 3 for small screen.

In order to view an image on a large screen, the top plate 8 is opened from the unused state shown in FIG. 3 and is fixed upright with the fixing bracket 10, and the reinforcing plate 11 to which the reflecting mirror 6 is attached is attached. The angle of the reflecting mirror 6 is adjusted by rotating, and the supporting bracket 13 is adjusted.
Fix with. In this state, the image projection device 1 moves the lens surface 2
Is reflected by the reflecting mirror 6 and is projected on the large-screen reflective screen 7.

On the other hand, the screen-integrated projection display device of the present invention can be used as a desk with the lid 14 and the top plate 8 closed when the display device is not used, as shown in FIG. It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist. For example, as shown in FIGS. 4A and 4B, a groove 10a is formed in the fixing bracket 10, a plurality of cuts 10b are provided on the side of the groove 10a, and the head has a groove 10a.
a hook 20 whose diameter is larger than the width of a and whose shaft penetrates the groove 10a
a can protrude from the housing 20 to change the fixing position of the hook 20a so that the standing angle of the top plate 8 can be adjusted. By doing so, it is possible to make appropriate adjustments in relation to the angle between the top plate 8 and the reflecting mirror 6, and it is possible to set the large-screen reflective screen 7 to an arbitrary angle.

[0022]

As described above, the screen-integrated projection display device according to the present invention has a transmission screen for a small screen and a reflection screen for a large screen, so that it is used for a computer display, a game, a movie, and a conference monitor. The screen size can be selected and used according to the purpose.

[Brief description of the drawings]

1A and 1B are cross-sectional views according to an embodiment of the screen-integrated projection display device of the present invention, wherein FIG. 1A is a use state of a small screen transmission screen, and FIG. 1B is a use state of a large screen reflection screen. Are respectively shown.

FIGS. 2A and 2B are perspective views corresponding to FIG. 1, wherein FIG. 2A shows a use state of a small screen transmission screen, and FIG. 2B shows a use state of a large screen reflection screen.

FIGS. 3A and 3B are views showing a state where the screen-integrated projection display device is not used, in which FIG. 3A is a cross-sectional view and FIG. 3B is a perspective view.

FIG. 4A is a diagram showing a use state of another embodiment of the present invention, and FIG. 4B is an enlarged view of a main part thereof.

5A and 5B are views showing a conventional screen-integrated projection display device, in which FIG. 5A is a perspective view and FIG. 5B is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image projection apparatus 2 Lens 3 Transmission screen for small screens 4, 9 Axles 5, 10 Fixing brackets 6 Reflector 7 Reflection screen for large screens 8 Top plate 11 Reinforcement plate 12 Reinforcement frame 13 Support bracket 14 Cover 15 Transmission Type screen 20, 21 housing

Claims (5)

(57) [Claims] 1. A top plate that can be turned upside down with respect to a housing, a reflective screen provided on an inner surface of the top plate, and a transmissive screen that is housed in the housing and stands on the top plate surface. An image projection device arranged in the housing toward the transmissive screen at the time of standing, and at the time of erecting the top plate, the image projection device is located on an optical path of the image projection device and is positioned on the reflective screen. A screen-integrated projection display device, comprising: a reflecting mirror for projecting an image. 2. The transmissive screen is pivotally supported on the housing so as to be rotatable with respect to the housing, and protrudes and retracts from an opening formed on the top plate on the top plate surface, and is detachably attached to the opening. The screen-integrated projection display device according to claim 1, further comprising a lid. 3. The screen-integrated projection display device according to claim 2, wherein said reflecting mirror is pivotally supported to a free end side of said transmission screen. 4. The display unit with an integral screen according to claim 3, wherein said reflecting mirror is fixed at an arbitrary angle. 5. The screen-integrated projection display device according to claim 4, wherein the reflection type screen is fixed at an arbitrary angle.