JP3050201B2 - Projection display device - 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 display device used for displaying a large screen.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view showing the appearance of a conventional mirror-reflection integrated projection display device, and FIG. 10 is a sectional view showing the inside of the mirror-reflection integrated projection display device of FIG. 9 and 10, reference numeral 10 denotes a hollow housing constituting the main body of the projection display device, 11 denotes a front surface of the housing 10, 12 denotes an upper surface of the housing 10, 13 denotes a side surface of the housing 10, and 14 denotes a housing 10. Underside of the 1
5 is a back surface of the housing 10. 16 is the back surface 15 of the housing 10
Is a convex portion provided in the upper part of the shape and protruding in a concave shape. Reference numeral 1 denotes a screen for displaying an image from the reflection mirror 2 provided on the upper part of the front surface 11 of the housing 10, and 2 denotes an image from the projection device 3 provided on the inner surface of the convex portion 16 having a cross-shaped shape to the screen 1. The reflecting mirror 3 is a projection device provided inside the housing 1 for projecting an image.

[0003] As shown in FIG. 10, the mirror reflection-integrated projection display device reflects an image projected from a projection device 3 on a reflection mirror 2 and projects it on a screen 1. As described above, the mirror reflection-integrated projection display device reflects the image on the reflection mirror 2, so that the depth of the housing 10 (the housing 1
0 (the length of the side surface 13 with respect to the front surface 11) can be reduced, and the projection display device can be downsized.

FIG. 11 is a perspective view showing the appearance of a conventional multi-vision integrated projection display device, and FIG. 12 is a cross-sectional view showing the inside of one projection display device in the multi-vision integrated projection display device shown in FIG. is there. 11 and 12, reference numeral 20 denotes a multi-vision integrated projection display device;
0A to 20D are multi-vision integrated projection display devices 20
Is a projection display device. Note that the multi-vision integrated projection display device 20 shown in FIG. 11 includes four projection display devices 20A to 20D. 1 is a screen provided on the front of the projection display devices 20A to 20D,
Reference numeral 3 denotes a projection device that projects an image provided inside the projection display devices 20A to 20D.

As shown in FIG. 10, the multi-vision integrated projection display device 20 is configured by stacking a plurality of projection display devices 20A to 20D (four in FIG. 10), so that a plurality of screens are required. 1 can display an image and provide a large screen display.

However, the multi-vision integrated projection display device 20 requires the screens 1 to be adjacent to each other when the projection display devices 20A to 20D are stacked.
It is necessary to match the size of the front surface of the projection display devices 20A to 20D with the size of the screen 1. Accordingly, as shown in FIG. 12, one projection display device 20A to 20D
The image projected from the projection device 3 is configured to be directly projected on the screen 1.

As described above, the projection display devices 20A to 20D
Directly outputs the image projected from the projection device 3 (that is, FIG.
Since the image is projected on the screen 1 (without passing through the 0 reflection mirror 2), the depth of the housing of the projection display devices 20A to 20D needs to secure a projection distance determined by the size of the screen 1 and the specification of the lens of the projection device 3. For this reason, the length is longer than that of the mirror-reflection integrated projection display device.

The integrated type of the mirror-reflection integrated projection display device and the multi-vision integrated projection display device 20 means that the projection unit includes the projection device 3 for projecting an image and the screen 1 that projects the image. It means that the display unit is integrally formed in the housing.

As a prior art related to the present invention, there is Japanese Patent Application Laid-Open No. 5-158151.

[0010]

As described above, the conventional mirror-reflection integrated projection display device has the screen 1 provided on the upper portion of the front surface 11 of the housing 10 as described above. The multi-vision integrated display device 20 cannot be configured by stacking, and the mirror reflection integrated projection display device has the advantage of shortening the depth of the housing 10 to reduce the size of the device. There is a problem that the advantage of being able to provide a large screen display in the device 20 cannot be achieved at the same time.

The mirror-reflection integrated projection display device and the multi-vision integrated projection display device 20 include an integrated projection display device (that is, a projection device 3 for projecting an image and a screen 1 for projecting an image) in a housing. Since the projection display device is integrally configured, the projection display device must be disassembled in the event that any electrical trouble (such as a failure) occurs in such a projection display device. Maintenance work is troublesome. Further, when the projection display device is manufactured, it must be assembled integrally, and there is a problem that the productivity of the projection display device is reduced (or not improved).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a projection display device capable of providing a large-screen display while reducing the size of the device.

Another object of the present invention is to provide a projection display device which can easily perform maintenance work and improve the productivity of the device.

[0014]

Projection display device according to the invention SUMMARY OF THE INVENTION The first aspect, the space portion of the rear side is formed by cutting obliquely downward of the upper surface, and the lower surface of the rear side so as to open
A hollow housing having an opening formed by notching, a screen for projecting an image provided on the front surface of the housing, and a space of a lower housing when the housings are stacked in a plurality of stages.
Can be attached to the opening of the upper case so that it fits into the part
Adjust the size of the image,
It is configured to include a projection unit capable of inverting and projecting an image, and a reflection mirror provided on the inner surface of the slope of the space and reflecting the image projected from the projection unit to a screen.

According to a second aspect of the present invention, there is provided a projection display device having a movable leg provided at a front end of a lower surface so as to be housed in a housing.

According to a third aspect of the present invention, in the projection display device, when a plurality of housings are stacked, a holding portion for holding a lower end of the upper housing is provided on a side surface of a space portion of the housing. It is provided.

[0017]

According to a fourth aspect of the present invention, there is provided the projection display device, wherein a handle is provided on an upper surface of the projection unit .

According to a fifth aspect of the present invention, there is provided the projection display device, wherein a mounting portion is provided for fitting the projection portion into the space of the housing when not in use.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a perspective view showing the appearance of a mirror reflection type projection display device according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view showing the inside of the projection display device of FIG. 1 and 2, reference numeral 30 denotes a hollow housing constituting the main body of the projection display apparatus, 31 denotes a front surface of the housing 30, 32 denotes an upper surface of the housing 30, and the upper surface 32 is a horizontal surface portion 32a and the horizontal surface 32a. The back surface 35a of the surface portion 32a is formed by cutting a diagonally downwardly U-shaped slope portion 32b (the slope portion 32b is formed by cutting the upper surface 32 side of the vertical surface of the back surface 35 into a U-shape). It is the same even if it is considered that the cutout is formed. The angle of the inclined surface 32b with respect to the horizontal surface 32a corresponds to the mounting angle of the reflection mirror 2 that reflects the image from the projection device 3 to the screen 1 on the front surface 31 of the housing 30. 33 is a side surface of the housing 30, 34 is a lower surface of the housing 30, and 35 is a back surface of the housing 30.

A holding portion 36 is formed on the left and right side surfaces 33 of the inclined portion 32b, and holds (supports) an end portion on the rear surface 35 side of the housing 30 of the upper projection display device when the projection display device is overlapped. (In other words, it is a portion remaining on the left and right side surfaces 33 when the horizontal surface portion 32a of the upper surface 32 is cut out in a U-shape to form the inclined surface portion 32b). The holding portion 36 shown in FIG. 1 is formed in a plate shape. However, the holding portion 36 is not limited to this, and may have any shape such as a rod shape as long as the holding portion 36 holds an end of the upper housing 30 on the back surface 35 side. But it doesn't matter. The slope 3
The space on the back surface 35 side of the upper surface 32 surrounded by the holding portion 36 and the 2b is called a space portion 39. 37 is a back surface 3 of the lower surface 34 of the housing 30
5 is a hollow protrusion protruding from the
At the lower part of the front surface 31 side, a notch surface portion 37a formed by notching is provided. Inside the protruding portion 37,
A projection device unit to be described later is incorporated. The notch 37a of the projection 37 is formed by cutting out the same angle as the slope 32b of the upper surface 32. Reference numeral 38 denotes a movable leg provided at an end of the lower surface 34 of the housing 30 on the front surface 31 side and configured to be housed in the housing 30.

Reference numeral 1 denotes a screen provided on the front surface 31 of the housing 30 for displaying an image from the reflection mirror 2, and 2 denotes a slope 3
A reflection mirror 3 provided on the inner surface of 2b and reflecting the image from the projection device 3 to the screen 1 is a projection device for projecting an image provided inside the projection 37. As shown in FIG. 2, an image projected from the projection device 3 incorporated in the projection 37 is reflected on the reflection mirror 2 provided on the inner surface of the slope 32 b and is projected on the screen 1.

FIG. 3 is an enlarged perspective view showing the inside of the protrusion. In FIG. 3, reference numeral 3 denotes the above-described projection device provided inside the protruding portion 37, reference numeral 4 denotes an electric circuit unit for controlling the operation of the projection device 3 and the like, and reference numeral 5 denotes a power supply unit for supplying power to the projection device 3. The projection device 3, the electric circuit unit 4 and the power supply unit 5 constitute a projection device unit. 37a is the above-mentioned cutout surface portion.

Next, the assembling operation of the multi-vision projection display device by stacking the projection display devices will be described. 4 is a perspective view showing a state in which a multi-vision projection display device is constructed by stacking the projection display devices of FIGS. 1 and 2 in two stages, and FIG. 5 shows the inside of the multi-vision projection display device of FIG. It is sectional drawing. It should be noted that the reference numeral of each part of the upper projection display device is denoted by A, and the reference numeral of each component of the lower projection display device is denoted by B. As shown in FIGS. 4 and 5, when the projection display devices are stacked in two stages, the projection 37A of the housing 30A of the upper projection display device is connected to the rear surface 35B of the upper surface 32B of the housing 30B of the lower projection display device. It fits into the space 39B formed on the side. At this time, the cutout surface 37Aa of the protruding portion 37A of the upper housing 30A abuts on the slope 32Bb of the lower housing 30B, and the lower surface 34A of the upper housing 30A and the horizontal surface 32Aa of the lower housing 30B and The holding section 36A comes into contact with the upper housing 30A and is held by the lower housing 30B. At this time, the movable leg 38A of the upper projection display device is housed inside the upper projection display device.

In this state, since the lower surface 34A of the upper housing 30A and the upper surface 32B of the lower housing 30B are in contact with each other, the screens provided on the front surfaces 31A and 31B of the upper and lower housings 30A and 30B. 1 are adjacent to each other, and can constitute a multi-vision projection display device.

As described above, according to the first embodiment, the projecting portion 37A provided on the lower surface 34A of the housing 30A of the upper projection display device is different from the housing 30A of the lower projection display device.
A space 39 formed on the back surface 35B side of the upper surface 32B of B
Since it is configured so as to fit into B, a multi-vision projection display device can be configured by stacking a plurality of mirror reflection type projection display devices (the screen 1 can be adjacent to each other), and as a result, It is possible to reduce the size of the device by shortening the depth of the housing 30 of the mirror reflection type projection display device, and at the same time, it is possible to configure a multi-vision projection display device and provide a large screen display. In addition, since the movable legs 38 are configured to be housed in the housing 30, the screen 1 can be adjacent to the mirror reflection type projection display device even if a plurality of mirror reflection type projection display devices are stacked, and the mirror reflection type projection display device can be provided. The device can stand alone. Further, since the holding portions 36 are provided on the left and right side surfaces 33 of the space portion 39, the projection display device at the upper stage can be stably held.

Embodiment 2 FIG. FIG. 6 is a rear perspective view showing a mirror reflection type projection display apparatus according to Embodiment 2 of the present invention. In the figure, 4
0 is the housing of the projection display device, 41 is the front surface of the housing 40, 42
Is an upper surface of the housing 40. The upper surface 42 has a horizontal surface portion 42a and an inclined surface portion 42b, similarly to the housing 30 shown in FIG.
Consists of 43 is a side surface of the housing 40, 44 is the housing 4
0 is the lower surface. Although not shown in FIG. 6, the lower surface 44 side of the lower surface 44 (the lower side of the slope 42 b) is open for guiding an image from the projection device 3. 45 is a back surface of the housing 40. 46 is a holding part for holding the housing 40 of the upper projection display device, and 47 is a space formed on the back surface 45 side of the upper surface 42. Reference numeral 48 denotes a projection device unit insertion portion formed by cutting the lower surface 44 of the housing 40 so that the rear surface 45 side is opened. Reference numeral 49 denotes a rail provided on a side surface (the side surface 43 side) inside the projection device unit insertion portion 48. In FIG. 6, the movable legs shown in FIG. 1 are not provided, but are omitted in the drawing, and are also provided at the end of the lower surface 44 of the housing 40 in FIG. Movable legs are provided. In addition, the screen 1, the reflection mirror 2,
The housing 40 and the rail 49 constitute a projection display unit of the projection display device.

Reference numeral 50 denotes a projection device unit accommodating portion for accommodating the projection device units (the projection device 3, the electric circuit section 4, and the power supply section 5). This projection device unit housing section 5
Numeral 0 corresponds to the projection 37 of the housing 30 of the projection display device shown in FIG.
A projection hole 50b for guiding an image from the projection device 3 to the reflection mirror 2 is provided on the upper surface. Reference numeral 51 denotes a rail provided on the side surface of the upper surface of the projection device unit accommodating portion 50. The rail 51 slides on a rail 49 provided on the inner side surface of the projection device unit insertion portion. 5
Reference numeral 2 denotes a screw for attaching and fixing the rail 49 and the rail 52. 53 is a guide pin for positioning in the left-right direction,
Reference numeral 54 denotes a handle for the user to hold the projection device unit housing section 50. Note that the projection device unit, the projection device unit accommodating portion 50, the rail 51, the screw 52, the guide pin 53, and the handle 54 constitute a projection portion of the projection display device.

In the projection display device described in the first embodiment, the screen 1, the reflection mirror 2, and the projection device unit are provided integrally in the housing 30, but in the second embodiment, an image is displayed. The projection display unit that projects and displays the image is separated from the projection unit that projects the image. That is, in the first embodiment, the projecting portion 37 containing the projection device unit is formed integrally with the housing 30, but in the second embodiment, the projection device unit housing portion 50 ( (Corresponding to the protruding portion 37) so as to be attachable to the housing 40.

Next, the operation of attaching the projection unit to the projection display unit will be described. First, the user holds the handle 54 on the upper surface of the projection device unit 50 (or holds the housing 40), and places the projection device unit housing portion on the rail 49 provided in the projection device unit insertion portion 48 of the housing 40. 50
The rail 51 provided on the upper surface of the projection device is placed, and the projection device unit accommodating portion 50 is slid (slid) and pushed in. The provision of the handle 54 allows the projection device unit housing 50 to be easily slid. Thereafter, the projection device unit housing portion 50 is positioned in the left-right direction by the guide pins 53, and the screws 52 are used.
Presses the rail 49 and the rail 51 together. As described above, the projection device unit housing section 50 is fixed to the housing 40, and the projection section is attached to the projection display section.

As described above, according to the second embodiment, the projection unit is separated from the projection display unit so that the projection unit can be attached to the projection unit. Is generated, the projection unit can be taken out by sliding it from the rear surface, and maintenance work of the projection display device can be easily performed. In particular, even when a plurality of projection display devices are stacked and used as a multi-vision projection display device, there is no need to dismantle the stacked projection display devices, and the effect is large. In addition, since assembly and electrical adjustment can be performed by the projection unit alone, it is possible to reduce the assembly work space and improve productivity when producing a projection display device.

It is also possible to use the projection unit without attaching it to the projection display unit. FIG. 7 is a diagram showing a case where such a projection unit is used without being attached to the projection display unit. As shown in FIG. 7, an image projected from the projection unit is displayed on another screen 7 (screen 1 provided on the projection display unit).
Rather than a screen that the user is confident about)
Can also be displayed. Therefore, projection onto the screen 7 in a size suitable for the purpose of the user is also possible.
Also, if the projection unit has a function to reverse the image,
Not only a rear projection type (a type in which the projection unit projects on the screen 7 from the side opposite to the side on which the user views the screen 7), but also a front projection type (a screen from the same side as the user viewing the screen 7 with the projection unit) 7 can be selected, and the possibility of using the apparatus can be expanded. As a result, the projection unit alone can be commercialized and sold.

Embodiment 3 FIG. 8 is a rear perspective view showing a mirror reflection type projection display apparatus according to Embodiment 3 of the present invention. Note that, in FIG. 8, the portions denoted by the same reference numerals as those in FIG. 6 are the same or corresponding portions, and redundant description will be omitted. In the drawing, reference numeral 60 denotes a mounting bracket (mounting unit) for mounting the projection device unit housing unit 50 (projection unit) and the housing 40 (projection display unit), and 61 denotes a screw (mounting unit) for fixing the mounting bracket 60. is there.

As shown in FIG. 8, when the projection display device is not used, the projection device
The projection device unit accommodating portion 50 is fitted into the space portion 47 of the projection device 0 (configured to be capable of being fitted as described above).
And the housing 40 are fixed from the rear surface 45 side with the screws 61 via the mounting bracket 60, whereby the projection display device can be downsized. Therefore, when transporting the device, the packaging size can be reduced, and the transportation cost can be reduced.

[0035]

As is evident from the foregoing description, according to the first aspect of the invention, the space portion formed by cutting the back side of the top obliquely downwards, and by cutting the lower surface of the rear side so as to open the form
A hollow housing having an opening formed therein, a screen provided on the front of the housing for projecting an image, and a plurality of housings.
When stacked, it fits into the space of the lower case
So that it can be attached to the opening of the upper case.
You can also adjust the image size and flip the image
Since it is configured to include a projection unit capable of projecting an image and a reflection mirror provided on the inner surface of the slope of the space and reflecting the image projected from the projection unit to the screen, such a mirror reflection type When a plurality of projection display devices are stacked, the screens 1 can be adjacent to each other, and a multi-vision projection display device can be configured. As a result, it is possible to reduce the size of the projection display device by reducing the depth of the housing thereof, and to provide a large-screen display. Also configure the projection unit
Some electrical trouble has occurred in the projector unit
In this case, slide the projector out from the back to remove it.
Maintenance work on the projection display device.
There is an effect that can be done. Also, assembling and power
Produce projection display devices because they can be adjusted
In order to reduce assembly work space and improve productivity
There is also an effect that can be done. In addition, install the projection unit on the housing.
It is possible to use without attaching
Projection onto a screen in a size suitable for
Select the front projection type or rear projection type.
You can also make choices and expand the possibilities of use. The result
As a result, the projection unit alone can be commercialized and sold.
There is also.

According to the second aspect of the present invention, since the movable legs configured to be housed inside the housing are provided at the front end of the lower surface, a plurality of projection display devices can be stacked. In addition, there is an effect that the projection display device alone can be stably stood.

According to the third aspect of the present invention, when a plurality of housings are stacked, a holding portion for holding the lower end of the upper housing is provided on the side surface of the space of the housing. Therefore, there is an effect that the projection display device in the upper stage can be stably held.

[0038]

[0039] Furthermore, according to the fourth aspect of the present invention, projection
Since the handle is provided on the upper surface of the projection unit , there is an effect that the projection unit can be easily attached to the housing.

Further, according to the fifth aspect of the present invention, since the mounting portion is provided for fitting the projection portion into the space of the housing when not in use, the projection display device can be downsized. As a result, when transporting the device, there is an effect that the packing size can be reduced and the transport cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a mirror reflection type projection display device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the inside of the projection display device of FIG.

FIG. 3 is an enlarged perspective view showing the inside of a protrusion.

FIG. 4 is a perspective view showing a state in which the projection display devices of FIGS. 1 and 2 are stacked in two stages to form a multi-vision projection display device.

5 is a cross-sectional view showing the inside of the two-stage stacked multi-vision projection display device of FIG.

FIG. 6 is a rear perspective view showing a mirror reflection type projection display device according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating a case where the projection unit is used without being attached to the projection display unit.

FIG. 8 is a rear perspective view showing a mirror reflection type projection display device according to Embodiment 3 of the present invention.

FIG. 9 is a perspective view showing the appearance of a conventional mirror-reflection integrated projection display device.

FIG. 10 is a cross-sectional view showing the inside of the mirror reflection-integrated projection display device of FIG. 9;

FIG. 11 is a perspective view showing the appearance of a conventional multi-vision integrated projection display device.

12 is a cross-sectional view showing the inside of one projection display device in the multi-vision integrated projection display device shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 screen 2 reflection mirror 3 projection device (projection device unit) 4 electric circuit unit (projection device unit) 5 power supply unit (projection device unit) 30, 40 housing 31, 41 front surface 32, 42 top surface 33, 43 side surface 34, 44 Lower surface 35, 45 Back surface 36, 46 Holder 37 Projection 38 Movable leg 39, 47 Space 50 Projector unit housing 54 Handle 60 Mounting bracket (mounting) 61 Screw (mounting)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 21/00 G03B 21/10 G03B 21/28 H04N 5/74

Claims (5)

(57) [Claims] 1. A cut space the rear side is formed by cutting obliquely downward of the upper surface, and the lower surface of the rear side so as to open
A hollow housing having an opening formed by cutting, provided on the front surface of the housing, and a screen for projecting images, the
When a plurality of housings are stacked, the lower housing
The opening of the upper casing so as to fit into the space.
Adjust the size of the image that is configured to be attached to the
A projection unit capable of inverting the image and projecting the image again ,
A projection display device, comprising: a reflection mirror provided on an inner surface of a slope portion of the space portion, for reflecting an image projected from the projection portion to the screen. 2. The projection display device according to claim 1, wherein a movable leg configured to be housed inside the housing is provided at a front end of the lower surface. 3. A case where a plurality of housings are stacked, a holding portion for holding an end portion on a lower surface side of the upper housing is provided on a side surface of a space portion of the housing. The projection display device according to claim 1. And a handle provided on an upper surface of the projection unit.
The projection display device according to any one of claims 1 to 3, characterized in that: 5. The projection unit is fitted into a space of the housing when not in use.
Claims characterized by providing a mounting portion for mounting
The projection display device according to any one of claims 1 to 4 .