JP2003298978A - Video projection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video projection system capable of providing a video image on a large-sized screen and allowing a viewer to comfortably view the video image in an attitude of lying on a bed or the like. <P>SOLUTION: The video projection system is provided with a bed 10, an image receiving means 30 placed above the bed 10, and a video image projection means 40 for projecting a video signal on the image receiving means 30 as light output. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video projection system for projecting video light onto a receiving means by a video projecting means.

[0002]

2. Description of the Related Art For example, in a hospital room or the like, a CRT (Cath) is installed on an installation table provided beside an inpatient bed.
ode-Ray Tube) is often placed on a television with a monitor or LCD monitor. However, when the TV is arranged in this way, the patient must lean on the TV or lean on the TV to watch the TV, and if such a posture is continued for a long time, the patient may be tired. was there. In order to improve this, for example, JP-A-11-33
In the technique disclosed in Japanese Patent No. 2922, a supporting arm whose shape can be changed is attached to a table provided so as to straddle a bed, and a liquid crystal television is rotatably attached to the other end of the supporting arm. ing. By doing so, the position of the liquid crystal television and the angle of the screen can be adjusted so that the patient can watch the television in a more comfortable posture.

[0003]

However, in the technique described in the above publication, since the supporting arm is attached to the table, the television is located above the table. For this reason, the table obstructed the patient's ability to watch TV while lying on his / her back in the bed, and the head of the pillow had to be raised by raising the position of the pillow. In addition, because the weight that can be supported by the support arm is limited, only a TV with a small screen can be installed compared with the case where the TV is placed on the installation table provided beside the bed. We couldn't provide the TV image on the large screen. An object of the present invention is to provide an image projection system that can provide an image on a large screen and can be easily viewed in a posture lying on a bed or the like.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 proposes a bed 10 and an image receiving means provided above the bed 10 as shown in FIGS. 1 to 4, for example. 30, 35, 82 and the image receiving means 30, 35,
The image projection system is provided with an image projection means 40 for projecting image light onto the light source 82.

Here, the bed means a bed or a floor surface on which bedding can be laid, and any bed can be used as long as a person can lie without laying the bed, for example, a bed, In addition to sofa beds, tatami mats and floors or mattresses laid on the upper surface of tatami mats and floors are also included. Further, as the image projection means, for example, a projector or a projector can be cited.

According to the first aspect of the present invention, since the image projection means magnifies and projects the image light onto the image receiving means provided above the bed, the image is projected on a large screen for a person lying on the bed. It becomes possible to provide a video that is played. Further, since the image receiving means is provided above the bed, the image can be easily viewed in the posture lying on the bed.

According to a second aspect of the invention, in the image projection system according to the first aspect, the image projection means 40 uses a light emitting diode as a light source.

According to the second aspect of the invention, since the image projecting means uses the light emitting diode as the light source, the power consumption is small and the power source is small. Further, a light emitting diode emits little heat when emitting light, as compared with a bubble lamp such as xenon or metal halide which has been conventionally used as a light source of such an image projecting means. Therefore, it is not necessary to consider that the bedding covers the light source portion and heat is stored in the bedding as in the conventional case, and it is possible to suitably arrange the bedding near the bed. Furthermore, since the heat generated during light emission is minimal, it is not necessary to equip the image projection means with a cooling fan as in the conventional case, and the device configuration can be simplified. Further, the rotation sound of the cooling fan does not become noise when the image light is projected onto the image receiving means. From the above, this image projection system can be particularly suitably used in hospitals, nursing homes, etc. where quietness is required.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described video projection system, for example, FIGS.
As shown in FIG. 1, the image receiving means screens 30 and 35 on which an image is projected, and the screens 30 and 35 are used as the bed 1.
And a support portion 20 that supports the end portion 13 on the side of the head portion 0 to the end portion 14 on the side of the foot portion so as to be movable and angle-adjustable.

According to the third aspect of the invention, the screen is supported by the supporting portion so as to be movable and angle-adjustable in the range from the head-side end to the foot-side end of the bed. The screen can be moved to a position where the image is more easily seen by a person lying on the floor. In addition, the screen has a simpler structure than a CRT monitor or a liquid crystal monitor, and the surface on which the image light is projected can be easily enlarged.

According to a fourth aspect of the present invention, in the image projection system according to the third aspect, for example, as shown in FIGS. 1 to 4, the image projection means 40 includes the screen 3
It is characterized in that the image light can be projected onto the screens 30 and 35 at any position of the front surface 30a side and the back surface 35b side of 0 and 35.

Here, when the image projection means projects the image light from the front side of the screen, it is preferable to use a screen which scatters the image light, and when the image light is projected from the rear side of the screen. It is preferable to use a transmissive type that transmits the light input from the back side and projects an image on the front side of the screen.

According to the invention described in claim 4, when the screen is provided above the bed, there is less restriction on the position where the image projection means is arranged.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a video projection system of the present invention will be described below with reference to the drawings. [First Embodiment] A first embodiment will be described with reference to FIG. The bed 10 (bed) shown in FIG. 1 is
It is provided in a hospital room and an inpatient 100 is lying on this bed 10. The bed 10 is a well-known bed, and the leg portion 11 standing from the floor surface 81 and the leg portion 11 are provided.
The lower table 12 supported by the table, on which the mattress 71 and the bedding 72 are placed, the headboard 13 (end portion on the head side) provided on the head 110 side of the patient 100, and the foot 1 of the patient 100.
Footboard 14 provided on the 20 side (end on the foot side)
It has and.

A screen 30 is attached to the upper end 14a of the footboard 14 via a support arm 20 (support portion). A clamp 22 is rotatably connected to the base end portion 21 of the support arm 20.
Thus, the support arm 20 can be detachably fixed to the footboard 14 by sandwiching the footboard 14. Further, the tip portion 23 of the support arm 20 is formed in a hinge shape, and the screen 30 is attached so that the angle can be adjusted.

Further, the support arm 20 is provided with a joint portion 24 substantially at the center of the base end portion 21 and the tip end portion 23, and the support arm 20 can be bent or extended at the joint portion 24. There is. That is, by rotating the base end portion 21 of the support arm 20 with respect to the clamp 22 and bending or extending the support arm 20 at the joint portion 24, the support arm 20 is moved to the screen 3.
0 is movable above the bed 10 within a range from the footboard 14 to the headboard 13.

The screen 30 attached to the tip portion 23 of the support arm 20 is formed in a rectangular panel shape and scatters image light projected from a projector 40 described later. The type of the screen 30 is not particularly limited, but for example, a bead screen in which beaded glass is sprayed on the surface, a white matte screen in which glass powder or shell powder is applied together with paint, and an aluminum thin film. An aluminum screen or the like, in which is deposited on a plastic board, can be cited. Also, since it is enough to scatter the projected image light,
For example, white paper or cloth may be used as the screen 30. The size of the image receiving surface of the screen 30 is appropriately about 15 inches to 30 inches, but is not particularly limited and may be determined according to the projection distance of the projector 40.

Further, a projector 40 is attached to the upper end 13a of the headboard 13 via a mounting metal fitting 50. The base end portion 51 of the mounting bracket 50 is formed in a clamp shape so that the head board 13 can be held. Further, the projector 40 is rotatably connected to the tip portion 52 of the mounting bracket 50. The mounting bracket 50 is detachable from the headboard 13, and the projector 40 is mounted on the mounting bracket 5.
It is removable from 0.

The projector 40 has a DVI input / output terminal (RG by digital signal) as an input / output terminal for video information.
Various input / output terminals such as dedicated terminals for B connection), RGB input / output terminals, video input / output terminals, S-video input / output terminals, serial input / output terminals as control terminals, wired input / output terminals, remote terminals, USB terminals, etc. Or it has a connection terminal.

The projector 40 projects the image information input from the input / output terminal or the connection terminal as image light on the screen 30. At this time, a light emitting diode (LED) is used as a light source.

The projector 40 has a trapezoidal correction circuit built therein. This trapezoidal correction circuit corrects the projected image light when the projector 40 has to project the image light obliquely onto the screen 30 so that the image projected on the screen 30 is not distorted. It is for. Furthermore, the projector 40
Has a built-in automatic focusing mechanism, which automatically adjusts the focus even when the position of the screen 30 changes and produces a sharp image.
It is designed to project to 0.

Further, the projector 40 is equipped with a remote controller or a wired controller (not shown). The patient 100 operates the remote controller or the wired controller while lying on the bed 10 to display the screen 30.
The image light can be projected onto the screen, and the distortion of the image projected on the screen 30 can be adjusted by the trapezoidal correction circuit.

According to the first embodiment, the bed 10
Since the image light is enlarged and projected by the projector 40 onto the screen 30 provided above, the image projected on a large screen can be provided to the patient 100 lying on the bed 10. Also, the screen 30
Since the patient is provided above the bed 10, the patient 100
The screen 30 in its natural state lying on the bed 10
You can see the image projected on.

Further, the screen 30 includes the support arm 20.
As a result, it is possible to move to a desired position in the range from the headboard 13 to the hood board 14 above the bed 10, and the angle can be adjusted. Therefore, patient 1
00 can move the screen 30 to a position where the image can be seen more easily. Further, even if the weight that the support arm 20 can support is limited, since the screen 30 is formed in a rectangular panel shape, the conventional CR is used.
The configuration is simpler than that of a T monitor, a liquid crystal monitor, or the like, and the area for receiving image light can be easily expanded.

Further, since the projector 40 uses a light emitting diode as a light source, it saves electric power and the power source can be downsized. In addition, a light emitting diode emits little heat when emitting light as compared with a bubble lamp such as xenon or metal halide which has been conventionally used as a light source of the projector 40. Therefore, even if the projector 40 is attached to the bed 10, there is little need to consider that the bedding 72 covers the light source portion of the projector 40 and heat is stored in the bedding 72 as in the conventional case. Further, since the light emitting diode generates little heat when emitting light, it is not necessary to provide the projector 40 with a cooling fan as in the conventional case, and the device configuration of the projector 40 can be simplified. Further, when the image light is projected on the screen 30, the rotating sound of the cooling fan does not become a noise, and the quietness is not impaired even in a hospital room equipped with the bed 10.

Further, since the projector 40 has a trapezoidal correction circuit built-in, even if the projector 40 cannot be arranged so as to project an image in parallel with the screen 30,
Images can be corrected by this trapezoidal correction circuit.

Further, the screen 30 is attached to the footboard 14
The support arm 20 to be attached to the headboard 13 and the mounting bracket 50 to attach the projector 40 to the headboard 13 are detachable, so that they can be detached from the bed 10 and put away when necessary.

The present invention is not limited to the above-mentioned first embodiment, and it is needless to say that the present invention can be appropriately modified without departing from the gist of the present invention. For example, the projector 40 is mounted on the headboard via the mounting bracket 50, but the invention is not limited to this. For example, the projector 40 may be mounted on a shelf or a table or a floor 82 provided near the bed 10. Then, the image light may be projected on the screen 30. Further, the projector 40 may be attached to the support arm 20 as described later.

The shape of the support arm 20 is not particularly limited, and the screen 30 is movable above the bed 10 within the range from the headboard 13 to the footboard 14 and the angle of the screen 30 is adjustable. Anything can be used as long as the support arm 20 is supported on the floor 82. For example, the support arm 20 can be a stand type that can be placed on the floor 82. Also, the screen 30
May be provided above the bed 10 so as to be suspended from the ceiling surface 82. Further, the screen 30 is not limited to the panel-like one, and may be a cloth-like one or a sheet-like one. Further, the screen 30 may not be particularly provided, and the image light may be projected onto the ceiling surface 82 or the like as described later.

Further, the bed 10 is not limited to one provided in a hospital room, and it goes without saying that it may be provided in a home or the like in addition to a nursing facility, an accommodation facility, or the like. Also, instead of bed 10, sofa bed or floor 8
It may be bedclothes or the like placed on the upper surface of 2, a tatami mat, or the like, and a screen 30 is provided above them, and the screen 3
The image light may be projected from the projector 40 to 0.

[Modification 1] Next, Modification 1 according to the first embodiment will be described with reference to FIG. In the modified example 1, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. A support arm 20 is attached to the upper end 13a of the headboard 13 of the bed 10 so as to support the screen 30 above the bed 10 so as to be movable and angle-adjustable. The projector 40 is rotatably suspended from the support arm 20 via a suspending metal fitting 55 between the joint portion 24 and the tip end portion 23 of the support arm 20, and projects image light on the screen 30. Is configured.

According to the first modification, since the screen 30 and the projector 40 are attached to the headboard 13 via the support arm 20, the screen 30 can be mounted even when the bed 10 is not equipped with the footboard 14. It can be attached to the bed 10.

[Modification 2] Next, Modification 2 according to the first embodiment will be described with reference to FIG. In the second modification, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In Modification 2, the projector 40 includes the upper end 13 of the headboard 13.
It is detachably attached to a through a mounting bracket 50. Then, the projector 40 is mounted on the ceiling surface 82 of the hospital room.
The image light is projected toward. That is, modification 2
In the above, the ceiling surface 82 functions as an image receiving unit on which image light is projected from the projector 40.

According to the second modification, since the image is projected on the ceiling surface 82, it is not necessary to provide the screen 30, and the cost for the screen 30 can be reduced. Further, since the image light is projected on the ceiling surface 82, the patient 100 can comfortably view the image in a natural state with the back lying on the bed 10. Modification 2
In the above, the screen 30 may be provided on the ceiling surface 82 so that the surface on which the image light is projected faces the bed 10.

Second Embodiment Next, a second embodiment of the image projection system of the present invention will be described with reference to FIG. A screen 35 is attached to the upper end 14 a of the footboard 14 of the bed 10 via the support arm 20 to the tip portion 23 of the support arm 20. Then, between the tip end portion 23 of the support arm 20 and the joint portion 24, the projector 40 is rotatably hung on the support arm 20 so that the projector 40 is arranged on the back surface 35b side of the screen 35 via a hanging metal fitting 55. It has been lowered.

The screen 35 is the back surface 3 of the screen 35.
The projector 40 is a transmissive type that transmits the light incident from the 5b side and projects an image on the front surface 35a of the screen 35, and the projector 40 projects the image light on the screen 35 from the back surface 35b side of the screen 35.

According to the second embodiment, even if the projector 40 cannot be mounted on the headboard 13 via the mounting bracket 50, the footboard is supported by the support arm 20 together with the transmissive screen 35. It can be attached to 14. That is, according to the first embodiment and the second embodiment, with respect to the screens 30 and 35 provided above the bed 10, from the front surface 30a side of the screen 30, the back surface 3 of the screen 35 is formed.
Image light can also be projected from the 5b side. Therefore,
The projector 40 and the screen 30 can be appropriately arranged depending on the place where the screen 30 or the transmissive screen 35 is arranged.

The present invention is not limited to the second embodiment described above, and it is needless to say that the present invention can be appropriately modified without departing from the spirit of the present invention. For example,
The projector 1 is attached to the bed 1 via the hanging metal fitting 55.
Although it is hung from the support arm 20 attached to 0, the present invention is not limited to this. The projector 40 may be arranged in any position as long as it can project the image light from the back surface 35b side of the transmissive screen 35. For example, a table, a shelf or a floor surface 81 provided near the bed 10 can be used. It may be placed directly on the.

Although the transmissive screen 35 is attached to the bed 10 via the support arm 20, the present invention is not limited to this. The support arm 20 may be a stand type that is placed on the floor, and a transmissive screen 35 may be supported above the bed 10 so as to be movable and angle adjustable. Further, the ceiling surface 82 hangs the transparent screen 35 so that the bed 1
It may be provided above 0.

[0040]

According to the first aspect of the present invention, the image projection means magnifies and projects the image light to the image receiving means provided above the bed, so that a large screen is displayed for a person lying on the bed. It becomes possible to provide the image projected on. Further, since the image receiving means is provided above the bed, the image can be easily viewed in the posture lying on the bed.

According to the second aspect of the invention, the same effect as that of the first aspect can be obtained, and since the image projecting means uses the light emitting diode as the light source, the power saving and the power source can be small. . In addition, compared to conventional bubble lamps such as xenon and metal halide, the light emitting diode generates little heat when emitting light, and it is easy to place this image projection means near the bed, and when projecting image light. There is no noise. Therefore, this image projection system can be suitably used in hospitals, nursing facilities, etc. where quietness is required.

According to the third aspect of the invention, the same effect as that of the first or second aspect can be obtained, and the screen is supported by the supporting portion from the head end to the foot end. Since it is supported so as to be movable and angle-adjustable within the range of the part, the screen can be moved to a position where a person lying on the bed can easily see the image. Also,
The screen has a simpler structure than a CRT type monitor or a liquid crystal type monitor, and the surface on which the image light is projected can be easily enlarged.

According to the invention described in claim 4, not only the same effect as in claim 3 can be obtained, but also when the screen is provided above the bed, there is a restriction on the position of the image projection means. Less.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a video projection system according to a first embodiment of the invention.

FIG. 2 is a schematic diagram showing a modified example 1 of the image projection system according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram showing a second modification of the image projection system according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing a video projection system according to a second embodiment of the invention.

[Explanation of symbols] 1 Video projection system 10 sleeper 12 Head end (headboard) 13 Foot side end (foot board) 20 Support (support arm) 30 Image receiving means (screen) 30a front (of screen) 35 image receiving means (transmissive screen) 35b (transparent screen) back 40 Image projection means (projector) 82 Image receiving means (ceiling surface)

Claims (4)

[Claims] 1. An image projection system comprising: a bed; an image receiving means provided above the bed; and an image projection means for projecting image light onto the image receiving means. 2. The image projection system according to claim 1, wherein the image projection unit uses a light emitting diode as a light source. 3. The image projection system according to claim 1, wherein the image receiving unit has a screen on which an image is projected and a range of the screen from an end on the head side to an end on the foot side of the bed. The image projection system according to claim 1, further comprising: a support portion that supports the movable portion and the angle of the movable portion. 4. The image projection system according to claim 3, wherein the image projection unit can project image light onto the screen at any position on the front side and the back side of the screen. Video projection system.