JPH05316454A - Projection display device - Google Patents

Abstract

PURPOSE:To make it easy to see the video of a projection display device and to improve its maintenance. CONSTITUTION:An axis 5 on the right/left sides of the projection unit 1 of the projection display device is inserted to the groove of a frame 8 having plural stages of grooves 9, 10 and 11 and fixed by a wingnut 6 to rotate/move the direction of the beam of the projection unit 1. Thus, the main beam of the projection unit is rotated to adjust it to the position of the eyes of a monitor to reduce the luminance change of the video to a large degree to make the video easy to see, to make the main beam rotatable in an assembled state and to make a screen exchangeable to improve maintenance to a large degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the mechanism, structure, and maintenance of a combination projection display device for reducing the change in image brightness of the combination projection display device.

[0002]

2. Description of the Related Art As an example of a device for reducing the brightness change of the screen of each screen of a conventional combination projection display device, there is a mechanism for rotating and installing the projection unit toward the viewer. In some cases, the main body is aligned with the turning position and a hole is formed in the wall of the storage of the projection display device, and the main beam is projected toward the viewer by screwing the hole and the projection unit. In another example, there is one in which the main body of the projection type display device is installed in a state of being vertically rotated. As in each of the above examples, the center of the main light flux of the projection display device is projected onto the center of the screen, and the viewer's eyes are positioned along the straight line extension of the projected light flux to reduce the change in brightness of the image. I was letting it. As an example of the device for rotating the main body of the projection type display device, there is a multi-projection, system, etc. issued by Pioneor Co., Ltd., catalog, July 1990.

[0003]

In the prior art described above, the projection unit housing main body is screwed directly into the hole while the position of the projection unit storage body is adjusted to the turning position by a human hand, so that a combination of a plurality of sets is formed. After the model projection display device is assembled, the unit body cannot be rotated unless it is disassembled into a single-projection display device, and a tool such as a screwdriver or spanner is required for the rotation and assembly work, which takes a lot of time and effort. There was a problem.

Further, according to the example of the multi-vision and system issued by the Pioneer Corporation catalog July 1990, it is not possible to add parts or use the same parts for inclining each projection display device. However, there has been a problem that the installation stability of the combination projection type display is spoiled, and the assembly requires a great deal of labor as described above.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection type display device which can easily rotate the projection unit even after assembly, reduce a decrease in image brightness, and have good maintainability.

[0006]

For the purpose of solving the above problems, a pair of axes are fixedly coupled substantially in the front and rear direction perpendicular to the left and right side surfaces of the projection unit, and the center of the main light beam comes to the center of the screen. The projection unit is a mechanical means such as a wing nut that can be detached by human hands so that the light flux of the lens of the projection unit can be detachably installed in multiple stages so that the center of the screen becomes the virtual rotation center. The shaft provided in the projection unit is combined with the groove of the frame having a plurality of sets of grooves and installed in the storage.

Further, the screen is tilted and fixed, and the screen itself is provided with a mechanism for attaching and detaching the screen.

Further, in order to use the space between the screen and the projection unit as a maintenance space, an internal member between the screen and the projection unit is deleted and a door is provided at the boundary with the outside.

[0009]

Since the light flux of the projection unit and the screen can be rotated around a multi-stage screen by a human hand, the main light flux of the projection unit is substantially concentrated on the viewer and the change in the brightness of the image of each screen is reduced. Also, by using the section between the screen and the projection unit, it can be rotated and installed / removed by loosening and tightening the wing nut, so the projection unit and screen can be manually rotated even after the combined projection display device is assembled. Easy to do.

[0010]

The details of one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the external appearance of a projection unit of a constant installation type projection display device (hereinafter, the constant installation type projection display device is abbreviated as a fixed display device) of one embodiment of the present invention. 2 is a schematic view seen from the arrow direction (a) in FIG. 1, showing a state where the main light flux of the projection unit is horizontal with the screen center, and FIG. 3 is seen from the arrow direction (a) in FIG. The schematic diagram shows a state in which the main light flux of the projection unit is tilted downward through the center of the screen, and FIG. 4 is a schematic view seen from the arrow direction (a) in FIG. FIG. 5 shows a state of passing through the center and further tilting downward, FIG. 5 shows a schematic view of the cross section taken along the line AA of FIG. 1 as seen from the front, and FIG. 6 shows a stationary display having the projection unit of FIG. A combination projection display device that is assembled from the device Shows a schematic representation of the observed cross-section.

In each drawing, 1 is a projection unit, 2 is a projection lens group, 3 is a housing, 4 is a storage box, 5 is an axis,
6 is a wing nut, 7 is a handle, 8 is a frame, 9 is a first groove, 10 is a second groove, 11 is a third groove, 12 is a screw,
13 is a screen, 14 is a Fresnel lens sheet, 15
Is a lenticular sheet, 16 is a screen framework, 17
Indicates the center of the screen, 18 indicates a set of storages, 19 indicates a moving table, 20 indicates a leveler, 21 indicates casters, 22 indicates a floor, and 23 indicates a door.

In each figure, the projection unit 1 includes a projection lens group 2, a housing 3, other electronic parts, electric parts,
It is composed of mechanical parts (not shown), and a pair of shafts 5 are fixedly engaged with both side surfaces of the housing 3, and wing nuts which are engaged with the mechanical screws are attached to the shafts 5, and both side surfaces of the housing 3 are provided. When the pair of handles 7 are fixedly combined and the handles 7 are lifted by a human hand, the projection unit 1 is lifted in the same manner, while the frame 8 is a first groove 9 which is horizontal and has a horizontal direction as a longitudinal direction. Then, the projection unit 1 is tilted so that the center of the light flux of the projection lens set 2 passes through the center of the screen 13 and reaches the position of the human eyes of the viewer linearly. It is provided with a second groove to be fitted to the shaft 5 and a third groove to be fitted to the pair of shafts 5 in a state where the projection unit 1 is further tilted, and is fixed to the storage case 4 with a screw 12. It is based on.

Next, a screen set 16 and a storage set 18
The combination will be described.

The screens 13 are combined to the left, right, top and bottom to form a set 16 of screens, the projection units 1 are housed in the respective storage boxes 4, and the projection units 1 and the storage boxes 4 are assembled to form a storage box. As shown in FIG. 6, a set 18 is a set 18 and a screen set 16 is a storage set 1
A space for maintenance is provided in the middle of 8, and a door 23 is provided so that a person can enter this space.

Next, the operation of reducing the change in the brightness of the image and the ease of maintenance of the combination type display device in which the set 16 of screens and the set 18 of storages configured as described above are combined will be described in detail with reference to the drawings. ..

As shown in the drawing, the wing nut 6 is manually loosened and the handle 7 is lifted, and the shaft 5 is brought into contact with any groove, that is, the first groove 9 to the second groove and the third groove. Next, it is understood that the projection unit 1 can be assembled in the storage case 4 in the state shown in FIGS. 2 to 3 and 4 by manually tightening the wing nut 6, and as shown in FIG. The projection unit 1 shown in
When the projection unit shown in FIG. 3 is assembled in the second stage and the projection unit 1 shown in FIG. 4 is assembled in the third stage, the main light flux of each projection unit 1 passes through the center of each screen 13 and Since the light is condensed substantially at the eye level, the change in the brightness of the image on the screen 13 is reduced and it is easy to see, and as shown in FIG.
A person can enter through the door 23 using the space of the set 18 and the projection unit 1 can be rotated as shown in FIGS.

A core unit type projection wheel type display apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 7 is a perspective view showing the outer appearance of a core unit type projection display device (hereinafter, a core unit type projection display device is abbreviated as a core unit) of one embodiment of the present invention.
8 is a schematic view seen from the arrow direction (e) of FIG. 7, showing a state where the main light flux of the projection unit 1 is horizontal to the screen center, and FIG. 9 is a schematic view seen from the arrow direction (e) of FIG. FIG. 10 shows a state in which the main light flux of the projection unit 1 is tilted upward with respect to the center of the screen. FIG. 10 is a schematic view seen from the arrow direction (e) of FIG. 11 shows a state of being further tilted upward, FIG. 11 is a schematic view of the cross section taken along the line BB of FIG. 7 as seen from the front, and FIG. 12 is an assembly of the projection display device with the core unit of FIG. 1 shows a schematic view of a cross section of a combined projection display device as viewed from the side.

In each of the drawings, the same parts as those in the previous drawings are designated by the same reference numerals, 31 is a storage case, 32 is a frame 33 is a first groove, 34 is a second groove, 35 is a third groove, and 36. Is a screw, 37 is a screen, 38 is a roller, 39 is a support base,
40 is a screen frame, 41 is the center of the screen,
42 is a set of storages, 43 is a moving base, 44 is a leveler, 4
5 is a caster and 46 is a floor.

In each drawing, the projection unit 1 includes a projection lens group 2, a housing 3, and other components, electronic parts, electric parts,
It is composed of mechanical parts (not shown), and a pair of shafts 5 are fixedly engaged with both side surfaces of the housing 3, and wing nuts which are engaged with the mechanical screws are attached to the shafts 5, and both side surfaces of the housing 3 are provided. When the pair of handles 7 are fixedly combined and the handles 7 are lifted by a human hand, the projection unit 1 is lifted up in the same manner, while the frame 32 has a horizontal first groove 33 whose longitudinal direction is the horizontal direction. Then, the projection unit 1 is tilted so that the center of the light flux of the projection lens set 2 passes through the center of the screen 37 and reaches the position of human eyes in a straight line. A second groove 34 to be combined and a third groove 35 to be combined with the pair of shafts 5 in a state where the projection unit 1 is further inclined are provided, and are fixed to the storage 31 with screws 36. Being organized.

Next, a screen set 40 and a storage set 42
The combination will be described.

The screens 37 are combined to the left, right, top and bottom to form a set 40 of screens, the projection units 1 are housed in the respective storage boxes 31, and the projection units 1 and the storage boxes 31 are assembled to form a storage box. Set 42
As shown in FIG. 6, a space for maintenance is provided on the rear surface of the set 40 of screens and the set 42 of storage, and a person can enter this space.

Next, the operation of reducing the change in the brightness of each image and the ease of maintenance of the combination type display device in which the projection type display device having the above structure is combined will be described in detail with reference to the drawings.

As shown in the drawing, the wing nut 6 is manually loosened and moved by the roller 38, the handle 7 is lifted, and any groove, that is, the first groove 33 to the second groove, the third groove 34,
It is understood that the projection unit 1 can be assembled in the storage case 31 in the state shown in FIGS. 8 to 9 and 10 by manually tightening the wing nut 6 with the shaft 5 abutting 35, as shown in FIG. As a combination projection display device, the projection unit 1 shown in FIG. 8 is at the first stage, the projection unit 1 shown in FIG. 9 is at the second stage, and the projection unit 1 shown in FIG. 10 is at the third stage. When assembled, the main light flux of each projection unit 1 passes through the center of each screen 41 and is substantially condensed at the level of human eyes, so that the image on the screen 37 is easy to see, and as shown in FIG. A person enters in the space of the set 40 of screens and the set 42 of storages in the state of the die display device, and the projection unit 1 is moved from the state shown in FIGS.
You can also see that it can be rotated like. It can also be seen that it can be rotated as shown in FIG.

In order to simplify the explanation, there is a stationary display device core unit, but the core unit is arranged so that the main light flux of the projection unit 1 is received vertically by the screen surface of the combination projection display device from the bottom. Alternatively, the structure of the inclined screen at the third stage will be described with reference to the drawings.

FIG. 13 is a perspective view showing the appearance of a single core unit of the combination type projection display apparatus according to one embodiment of the present invention, and FIGS. 14, 15, and 16 are taken along the line CC of FIG. FIG. 17 is a schematic view of a step, and FIG. 17 is a schematic cross-sectional view of the combination projection display device as seen from the lateral direction.

In each drawing, the same parts as those in the previous drawings are designated by the same reference numerals, and the others 51 are upper frames, 52 are lower frames, and 53.
Is a side frame, 54 is an upper frame plate, 55 is a side frame plate, 56 is a screen frame, 57 is a frame and female screw,
58 is a lower frame plate, 59 is a second stage plate, 60
Indicates the third plate.

In each drawing, the upper frame 51 is the upper frame plate 5.
8, the other end is fixed with a screw (not shown) with the end 52a fixing the upper side of the screen 37 as a free end, and the upper frame plate 54 is fixed to the screen frame frame 56 with a frame and a female screw 57. The screen frame frame 56 is fixed to the storage box 31 with screws (not shown), and the lower frame 52 has the end portion 52a fixing the lower side of the screen 37 to the lower frame plate 58 as a free end. , The other end is fixed with a screw (not shown), the lower frame plate 58 is fixedly coupled to the screen frame frame 56 with a frame and female screw 57, and the screen frame frame 56 is screwed to the storage 31 (not shown). ), The side frame 53 is a side plate 55.
End 5 fixing the left or right side of the screen 37
3a is a free end and the other end is fixed by a screw (not shown), and the side frame plate 55 is fixedly coupled to the screen frame frame 56 by a frame and female screw 57. The upper frame 51, the lower frame 52, and the side frame 53 are made of an elastic material such as spring steel, and are fixed to the upper frame plate 54, the lower frame plate 58, and the side frame plate 55 by screws (not shown). At the same time, they are independently attached to and detached from the screen frame 56 by a frame and female screws 57.

The second-stage inclined plate 59 incorporated in the second stage of the combined projection type display device having the above-described structure is substantially 3 in the front-back direction of the screen 37. And the screen 37 is combined with the side surface frame 53, and the third-stage tilt plate 60 incorporated in the third step has a tilt of about 7 ° and the screen 37 is combined on the side surface.
5, the holding angle of the screen 37 can be changed to 0 °, 3 °, and 7 ° by attaching and detaching the frame setscrews 57 to the second-stage inclined plate 59 and the third-stage inclined plate 60, respectively. It can be seen that the main light flux projected from each projection unit 1 of the combination projection display device formed by combining the above is condensed at the position of the eyes of the viewer.

Next, a method of exchanging the screen when the combined projection display apparatus is installed and assembled will be described with reference to the drawings.

FIG. 18 is a perspective view of the appearance of a portion of the core unit of the present invention which fixes the screen, and FIGS. 19 and 20 are exploded views when the screen 37 of FIG. 18 is removed. 21 is an external perspective view showing a method of replacing the screen 37 after the installation of the combined projection display apparatus in which the core unit of FIG. 18 is assembled.

In each of the drawings, the same parts as the ones previously mentioned are designated by the same reference numerals, others 69 are fixed frame frames, 70 is a right side plate, and 71 is a right side plate 70.
A counterbore hole provided on the inner frame 72, an inner frame right 72, a screw hole 74 provided on the right inner frame 72, an inner frame left 74, and an inner frame left 7
4 is a bevel hole, 76 is a shirred noodle plate, and 77 is a screw hole.

In each drawing, the upper frame 51 and the lower frame 52 are fixed to the frame fixing frame 69, the side frame 53 is fixed to the right side plate 70 or the left side plate 76, and the right side plate 70 is countersunk. The left side plate 7 is provided with a hole 71 and is detachably fixed to the screen frame frame 56 through the inner frame right 72 by the frame and female screw 57.
6 is detachably fixed to the screen frame 56 by a frame fixing screw 57 through the inner frame left 74.

A method of replacing the screen 37 after the installation of the combination type projection display device, which is a combination of the projection type display devices having the above-described configurations, will be described with reference to the drawings.

Remove the frame set screw 57 with a coin, remove the right side plate 70 and the side frame 53, and move the screen 3 to the right.
7 is pulled out and the screen 37 is replaced.

Further, for the screen 37 of the core unit on the right side, the set screw 57 is removed with a coin, the frame fixing screw 57 is removed with a coin from the bevel hole 75 provided in the inner frame left 74, and the right side plate 70 is removed. Slide 37 to the right to remove and replace.

In the example on the right above, the left and right side frames 53 and the left and right side plates 70, 75 are removed, and the core unit screen 37 located in the center is attached and detached.
Application examples of the present invention include those in which the upper frame 51 and the lower frame 52, or the upper frame plate 54 and the lower frame plate 58 are detachable with mechanical screws.

[0039]

According to the present invention, the projection unit 1 is arranged so that the main light flux of the projection unit 1 passes through the center of the screen 13.
With the screen center 17 as a virtual rotation center, the rotation system can be stopped with respect to the storage case 4, so that the main light flux of each projection unit 1 configured as a combination projection display device is positioned at the position of the viewer's eyes. The effect is that the change in the brightness of the image can be greatly reduced and the image can be easily viewed.

Further, since a person can enter the space of the set of screens 16 and the set of storages in the state of the combination type projection type display device to change the luminous flux direction of the projection unit 1 and the exchange of the screens can be easily performed. Has the effect of improving maintainability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of a projection unit that is always installed according to an embodiment of the present invention.

FIG. 2 shows a schematic view of FIG. 1 as seen from the direction of arrow (a).

FIG. 3 shows a schematic view of FIG. 1 as seen from the direction of arrow (a).

FIG. 4 shows a schematic view of FIG. 1 as viewed in the direction of arrow (a).

5 shows a schematic view of a section along the line AA in FIG.

FIG. 6 is a cross-sectional view of a combination projection display device that is a combination of the projection units of FIG.

FIG. 7 is a perspective view showing the outer appearance of a core unit according to an embodiment of the present invention.

FIG. 8 shows a schematic view seen from the arrow direction (b) of FIG. 7.

FIG. 9 shows a schematic view seen from the arrow direction (b) of FIG. 7.

FIG. 10 shows a schematic view seen from the arrow direction (b) of FIG. 7.

FIG. 11 shows a schematic view of a cross section along line BB in FIG. 7.

FIG. 12 is a cross-sectional view of a combination type projection display device formed by combining the core units of FIG.

FIG. 13 is a perspective view showing the external appearance of a single unit of a core unit type projection display device having a tilted screen according to an embodiment of the present invention.

FIG. 14 shows a schematic view of a section along the line CC of FIG.

FIG. 15 shows a schematic diagram of a cross-section along the line CC of FIG.

FIG. 16 shows a schematic view of a section along the line CC of FIG.

FIG. 17 shows a schematic view of a section along the line DD of FIG.

FIG. 18 is a perspective view showing the external appearance of the portion of the core unit of one embodiment of the present invention to which the screen is fixed.

FIG. 19 shows an exploded view of the screen shown in FIG. 18 when it is removed.

20 shows an exploded view of the screen shown in FIG. 18 when it is removed.

FIG. 21 is a perspective view showing a method of replacing the screen of the combination projection display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Projection unit, 2 ... Projection lens group, 3 ... Housing, 4 ... Storage box, 5 ... Shaft, 6 ... Wing nut, 7 ... Handle, 8, 32 ... Support stand, 9, 33 ... First groove, 10 , 34 ... Second groove, 11, 35 ... Third groove, 12, 36 ... Screw, 13, 37 ... Screen, 16, 40 ... Screen set, 17, 41 ... Screen center, 18 ... Storage set , 23 ... Door, 38 ... Roller, 39 ... Supporting base, 51 ... Upper frame, 52 ... Lower frame, 53 ... Side frame, 54 ... Upper frame plate, 55 ... Side frame plate, 56 ... Screen frame frame, 57 ... Frame Female screws, 58 ... Lower frame plate, 59 ... Second side plate, 60 ... Third side plate, 69 ... Frame fixing frame, 70 ... Right side plate, 71 ... Counterbore hole, 72 ... Inside Frame right, 73 ... Screw hole, 74 ... Inner frame Left, 75 ... Screw hole, 76 ... Left side plate, 77 ... Screw hole.

Claims (7)

[Claims] 1. A projection type display device comprising at least a projection unit and a screen, or a combination type projection display device constituted by combining a plurality of the projection type display devices individually in the vertical and horizontal directions, wherein the projection unit projects onto the screen. The projection unit passes through the center of the screen so that the projection unit can be rotated in multiple stages with the center of the screen as a virtual center of rotation so as to match the height of human eyes. The projection including the axis and the handle for lifting the projection unit, or the roller for moving the projection unit on the lower surface is provided, and the frame having a plurality of grooves for systematically supporting the axis or the projection or the handle is projected. A projection display device characterized in that it is fixedly engaged with a storage case for storing the unit. 2. The projection display device according to claim 1, wherein a wing nut or a mechanical screw is used for the system of the groove of the frame and the shaft or the projection. 3. The projection type display device according to claim 1, wherein a combination of a plurality of single projection type display devices is combined vertically and horizontally to form a combination of storage units for accommodating respective projection units of the combination type projection display device. And a pair of screens formed by combining the respective screens, a member for coupling the pair of projection units and the pair of screens is provided only on the outer frame and outer periphery of the combination projection display device, and the pair of projection units and the above A projection display device characterized in that a space is provided in the middle of a set of screens. 4. The projection display device according to claim 3, wherein the combination projection display device, the outer frame or the outer periphery of the projection unit set and the screen set are connected to a member for connecting the projection unit set and the screen set. A projection display device characterized in that a door reaching a space in the middle of the group is provided. 5. A projection type display device comprising at least a projection unit and a screen, or a combination type projection type display device constituted by combining a plurality of the projection type display device single parts vertically and horizontally, the left and right sides of the screen of the projection type display device. The side plate on the right side (left side) of the side frame plate fixing the side of the projection frame through the side frame is attached to the projection display device from the outside of the projection display device or to a frame frame provided in the projection display device with a mechanical screw. , Or the fastener is detachably fixed, and the left (right) side plate is detachably fixed to the projection display device or the frame frame provided in the projection display device from the inside with mechanical screws or fasteners. A projection display device characterized by the following. 6. A combination-type projection display device formed by assembling the projection-type display device according to claim 1 or 5, wherein the left and right side plates of the projection-type display device located at the lowermost stage, that is, the first-side side plates. Is formed by forming a vertical line on the front surface of the screen through a side frame so that the surface of the screen becomes vertical, and can be attached to and detached from the projection display device or a frame frame provided in the projection display device with a mechanical screw or a fastener. The right and left side plates of the projection display device, which are fixed to the second stage from the bottom, that is, the second side plate is the lower side of the screen or the lower frame is the upper side of the first stage screen. Alternatively, a projection display device or a projection display device may be provided in which the front surface of the second-stage side plate is formed so as to be in contact with the upper side of the upper frame and the upper side is inclined toward you, and the front surface is inclined. The frame is detachably fixed to the frame with mechanical screws or fasteners, and the side plate of the third step is also brought into contact with the upper side or the upper frame of the second step screen so that the upper side is inclined further toward you. A projection display device characterized in that the front surface of the third side plate is further inclined so that the light flux from the projection unit is vertically projected onto the center of the surface of each screen. 7. The apparatus according to claim 1 or 5, wherein the upper frame,
A projection display device characterized in that an elastic body made of a spring material is used for the lower frame, the side frame, the frame, the upper plate, the side plate, and the lower plate.