JP2799827B2 - Multi-projection system - 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 unit and a multi-projection system for easily replacing a screen.

[0002]

2. Description of the Related Art Conventionally, when constructing a large-screen multi-projection system, three CRTs for RGB are used.
And a projection unit with a built-in LCD projector and so on.

One form of such a projection system is as shown in FIG. 1, in which a projection unit 1 having a cube-shaped cabinet 11 is provided in a projection unit 1.
A Fresnel lens 4 having a built-in projector unit (not shown) having three GB CRTs, a liquid crystal projector, and the like, and from which an image from the projector unit is fixed by a fixed frame 10 requiring a narrow image shielding width. And a lenticular sheet 5 on a screen 6.

[0004] These projection units 1
As shown in FIG. 2, a projector unit (not shown) is built in the rear part of the cabinet 11 made of aluminum, and the screen 6 is fitted into the opening 2 on the front side.

As shown in FIG. 3, the screen 6 of the projection unit 1 adjacent to the screen 6 is fixed between the stopper piece 3 fixed to the opening 2 and the fixed frame 10 as shown in FIG. Are clamped and fastened by fixing screws 9 so that the screen 6 can be removed by removing the fixing frame 10.

[0006]

However, such a cube-type cabinet 11 requires exterior parts, is heavy in weight, is inconvenient to carry, and has difficulty in maintenance and inspection of a stationary type.

[0007] In order to solve such a problem,
As shown in FIG. 4, there is a tower type cabinet 11 composed of a plurality of frames.

When a large screen is constructed, as shown in FIG.
Are stacked in a predetermined number, and the projector unit 20 is fitted from the back side of the cabinet 11.

Incidentally, in the case of the projection unit 1 having the cube-type cabinet 11 covering the above-mentioned exterior, when the projector unit 20 is fitted inside the cabinet 11, similarly to the case of the turret-type, the rear surface of the projector unit 20 is fitted. It is done from the side.

In such a projection system, when the projector unit 20 is fitted inside the cabinet 11, a predetermined optical path length with respect to the screen 6 is required. The projector unit 20 is generally fitted from the back side of the cabinet 11.

In the above-mentioned conventional projection unit 1, when the screen 6 is replaced,
The screen 6 can be removed by removing the fixing frame 10 fastened by the fixing screw 9.

However, since the conventional screen 6 has its upper, lower, left, and right edges fixed by the fixed frame 10, when forming a large-screen projection system, the image width of the adjacent projection unit 1 is reduced by the fixed frame 10.
Are simply summed up in width, which hinders the reduction of the image width, which is a problem in forming a large screen.

Further, since the four sides of the screen 6 are fixed by the fixing frame 10 fastened by the fixing screws 9, the number of the fixing screws 9 increases and the number of parts increases. Was.

Furthermore, when the fixed frame 10 is detached, it is necessary to remove all the fixed frames 10 fixing the four sides of the screen 6, so that there is a problem that the number of work steps is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and can reduce the image width when a large screen is formed, and at the same time, reduce the number of clasps on the screen fixed frame. Accordingly, it is an object to provide a projection unit and a multi-projection system capable of reducing the number of parts and simplifying a screen replacement operation.

[0016]

According to the first aspect of the present invention,
A projector unit for projecting an image provided on the rear side of the turret-type cabinet; a screen provided on the front side of the cabinet for receiving and diffusing a projected image from the projector unit; and the cabinet At least two or more types of fixing frames which are screwed to a screen mounting frame attached to the front of the device to fix the screen, and relative points at which one of the types of fixing frames can be removed from the same direction. A multi-projection system combining a plurality of projection units each having a play insertion hole formed in
The space portion of the kind fixed frame is formed such that the screw fixing this one kind of fixed frame to the screen mounting frame does not abut against another one kind of fixed frame of the adjacent projection unit. One of the fixed frames of one projection unit is adjacent to another one of the fixed frames of the projection unit adjacent to the projection unit;
By means of the loose insertion hole, the other fixing frame of the adjacent projection unit is loosened with a screw fixed to the screen mounting frame so that it can be removed in the same direction as one of the fixing frames. .

In the first aspect, one of the fixed frames is:
The two sides of the screen are fixed in a tangent state, and the other
The seed is characterized in that it has a width in consideration of a degree of expansion and contraction due to a change in temperature and humidity of the screen.

[0018]

According to the projection unit of the present invention, the screen is fixed by at least two types of fixing frames provided on the front side of the tower type cabinet, and one of the fixing frames can be detached from another type of fixing tool. Since the loose insertion hole is formed at the relative point, when replacing the screen by removing the fixing frame, remove the fixing frame screws on the two sides of the screen of the adjacent projection unit through the loose insertion hole from inside the cabinet. Since the adjacent screen can be removed, the width of the medial portion of the fixed frame can be made extremely small, and the screen can be easily removed from the front surface.

One type of fixed frame fixes two sides of the screen in a tangent state, and the other type has a width in consideration of the degree of expansion and contraction due to changes in temperature and humidity of the screen. When a large screen is constructed, one type of fixed frame and another type are adjacent to each other, so that the image width of the adjacent fixed frame is determined by a combination of the narrow width and the wide width. Only the image width is reduced as a whole.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. 7 and 8 show a projection unit according to an embodiment of the multi-projection system of the present invention.

As shown in FIG. 1, a front frame 121 and a rear frame 131 composed of frames 120 and 130 are provided at the front and rear of the tower-type cabinet 110 of the projection unit 100. ing.

The front frame 121 and the rear frame 131 are connected by an upper frame 140 and a lower frame 150. A screen mounting frame 160 composed of frames 161a to 161d is mounted on the front frame 121.

The screen mounting frame 160 has holding frames 180a and 18 as one type of a fixed frame for holding the screen 170 on the screen mounting frame 160.
0b and another type of holding frame 180c, 18
0d is attached. The lower frame 150 has a table 2 on which the projector unit 200 is mounted.
10 is slidably disposed in the direction of the arrow.

The table 210 has left and right lower frames 1
The slide member 211 includes a slide member 211 that slides on the slide member 50 and a reinforcing member 212 that extends between the slide members 211. The shape of the slide member 211 is as shown in FIG. 9, and is engaged with the mounting portion 213 for mounting the projector unit 200, the contact portion 214 that contacts the lower frame 150, and the projection 151 of the lower frame 150. An engagement piece 215 and a mounting piece 216 for mounting a positioning member 217 for positioning the projector 200 are provided.

Here, the contact area with the lower frame 150 is reduced by narrowing the width of the contact portion 214, and the lubricating oil is provided between the upper surface of the lower frame 150 and the contact portion 214 of the slide member 211. Is applied, the dynamic frictional force of the sliding is reduced, so that the table 210 with the relatively heavy projector unit 200 mounted thereon is smoothly moved.

The positioning member 217 is provided with a screw-stopping piece 218 to be screwed to the projector section 200. For the table 210, the positioning member 21
7 are attached by screws 219, and by removing these screws 219, the positioning member 217 is removed.
Can be removed from the table 210. When it is necessary to remove the positioning member 217, the projector unit 200 is connected to the cabinet 110.
Is fitted from the front side, which will be described later.

Screen 170 of projector unit 200
The positioning of the optical path length with respect to is determined by the slide member 211 coming into contact with a stopper (not shown) provided on the lower frame 150.

The contact portion 214 of the slide member 211
As shown in FIG. 10, a long hole 220 for fine adjustment of the optical path length with respect to the screen 170 of the projector unit 200 is provided.
A screw hole (not shown) is also provided on the side, and the position for fine adjustment of the optical path length can be fixed by screwing.

FIG. 11 shows the screen mounting frame 1 described above.
FIG. 6 shows a connection structure of the frames 161a to 161d in FIG. 60, and screw insertion holes 162 and 163 are provided at ends of the frames 161a to 161d. At the end of each of the frames 161a to 161d, a corner fitting 16 is provided.
4 are interposed, and by attaching screws to the corner fittings 164 from the screw insertion holes 162 and 163, the ends of the frames 161a to 161d are fastened. I have. Similarly, each end of each frame of the cabinet 110 is fastened by the interposition of the corner fitting 164.

FIGS. 12 and 13 show the screen 1 described above.
14 shows the mounting structure of the screen mounting frame 160 in a state where the cabinets 110 are stacked as shown in FIG. 14, and FIG. Reference numeral 13 denotes a space between the left and right sides of the screen mounting frame 160, respectively. The screen 170 is composed of a lenticular sheet 171 and a Fresnel lens 172 disposed on the back side thereof.

The outer peripheral edge of the screen 170 is engaged with engaging portions 181a to 181d provided at the distal ends of the holding frames 180a to 180d holding the screen 170. Here, the holding frames 180a-
Height of the upright portion of the tip portion 182a~18 2 d of 180d is directly used as joint width. Details of the image width will be described later.

On the rear end side of the holding frames 180a to 180d, as shown in FIG. 15, a play insertion hole 183 having a diameter larger than the screw thread of the screw 240 corresponds to the holding frame 180b of the upper cabinet 110. 180d and the frames 161b, 161d. Play insertion hole 1
By inserting the shaft portion 231 of the driver 230 from 83, the holding frame 180a, 1
The screw 240 for fixing the 80c is loosened and can be removed from the front.

FIG. 16 is a view for explaining the above-mentioned image width. When the screen 170 is viewed from the front, the image width at the left end and the lower end is small, and the image width at the right end and the upper end is small. Has been enlarged. Thus, by increasing the media width at the right end and the upper end, deformation of the screen 170 due to thermal expansion can be absorbed.

That is, the lower end of the screen 170 is
The engaging portion 18 of the lower holding frame 180b is moved by its own weight.
1b, and the left end of the screen 170 is always in contact with the engaging portion 181d of the holding frame 180d, thereby reducing the media width of the holding frames 180b and 180d at the lower end and the left end. Can be.

On the other hand, at the upper end and right end of the screen 170, the holding frames 180a, 180c
By giving a little extra space to the tip 182a,
Although 182c is slightly wider than the media width of the holding frames 180b and 180d at the lower end and the left end of the screen 170, the media width when the projection units 100 are stacked in multiple stages is totally smaller.

Subsequently, a procedure for replacing the screen 170 in the multi-projection system having such a configuration will be described, and a method for fitting the projector unit 200 will also be described.

First, when forming a large screen, the cabinets 110 shown in FIG. 7 are stacked in multiple stages as shown in FIG. In this case, the screen 170 is previously mounted on the screen mounting frame 160 on the front side of the cabinet 110.

In this case, the load in the lower stage is such that the main body of the upper cabinet 110 including the projector section 200 is borne by the main body of the lower cabinet 110, and only the screen mounting frame 160 is attached to the lower screen mounting frame 160. The burden is shared and the load sharing is divided. This makes it difficult to remove the entire screen mounting frame 160 when stacked, and only the screen 170 is removed.

After stacking the cabinets 110 as necessary, the projector unit 200 is moved to the cabinet 1
10 is fitted inside. In this case, when there is a fitting space for the projector unit 200 on the back side of the cabinet 110, the table 210 is pulled out to the back side of the cabinet 110 as shown in FIG.

In this state, the projector unit 200 is lifted and placed on the table 210. Projector unit 2
At the time of mounting, the positioning is performed on the table 210 such that the front surface of the projector unit 200 comes into contact with the screw stopper 218 of the positioning member 217. After the projector unit 200 is placed, the table 210 is pushed into the cabinet 110 until it comes into contact with a stopper (not shown) of the lower frame 150.

At this time, lubricating oil is interposed between the upper surface of the lower frame 150 and the contact portion 214 of the slide member 211 of the table 210, and the width of the contact portion 214 is narrower, so that the lubricating oil contacts the lower frame 150. Since the area is reduced, the relatively heavy projector unit 20 is used.
The movement of the table 210 in a state where 0 is placed can be performed smoothly.

As shown in FIG. 10, in order to finely adjust the optical path length with respect to the screen 170 of the projector section 200, the table 2 is placed on the lower frame 150.
10 is shifted back and forth, and a screw (not shown) is screwed into the long hole 220 of the contact portion 214 of the slide member 211 in a state where an appropriate optical path length is obtained, and the table 210 is attached to the lower frame 15.
Fixed on 0.

On the other hand, when there is no space for fitting the projector section 200 on the back side of the cabinet 110, FIG.
The screen 170 is removed from the screen mounting frame 160 as shown in FIG.

When removing the screen 170,
Since the cabinet 110 is of a tower type, FIG.
As shown in FIG. 15, the projection units 100 can enter the inside of the cabinet 110 in a stacked state, and as shown in FIG. 15, holding frames at the upper end and the right end of the screen 170 to be replaced. Screen mounting frame 1 adjacent to 180a, 180c
The shaft portion 231 of the driver 230 is inserted into the play insertion hole 183 from the inside of the screwdriver 60, the screws 240 for fixing the holding frames 180 a and 180 c holding the screen 170 to be replaced are loosened, and the holding frames 180 a and 18 are loosened.
Then, the screen 170 is detached diagonally upward.

By such an operation, the screen 170
Frame 180 located at the upper end and right end of the frame
By removing a and 180c, the screen 170 can be removed from the front side of the cabinet 110.

After the screen 170 is removed, FIG.
The table 210 is pulled out to the front side of the cabinet 110 as shown in FIG. Table 210 for cabinet 11
When the table 210 is pulled out to the front side, a stopper (not shown) on the lower frame 150 that prevents the table 210 from moving to the front side is removed. When the table 210 is pulled out to the front side of the cabinet 110, the positioning member 217 is removed from the table 210 in advance. As described above, the positioning member 217 can be easily removed by extracting the screw 219 as described above.

After the table 210 is pulled out to the front side of the cabinet 110, the projector unit 200 is placed on the table 210, and as shown in FIGS. 20 and 21, the table 210 is pushed into the back side of the cabinet 110. By mounting the positioning member 217 and mounting the screen 170 in a reverse process to the removal of the screen 170, and further fixing the position of the table 210 to a predetermined position (a position where an appropriate optical path length is obtained for the screen 170), The assembly of the unit 200 is completed.

On the other hand, when the screen 170 is mounted on the screen mounting frame 160, the engaging recesses 1 of the holding frames 180b and 180d located at the lower end and the left end are used.
After the lower end and the left end of the screen 170 are engaged with 81b and 181d, the holding frames 180a and 180c are mounted on the upper end and the right end of the screen 170, and enter the inside of the cabinet 110 as described above. The shaft portion 231 of the driver 230 is inserted into the loose insertion hole 183 from inside the screen mounting frame 160 adjacent to the holding frames 180a and 180c at the upper end portion and the right end portion of the screen 170 to be screwed, and the screw 240 is tightened to fix the holding frame 180a. The screen 170 is fixed via 180c.

As described above, in this embodiment, the screen 1
The lower end of the lower holding frame 180 is moved by its own weight.
b is always in contact with the engagement recess 181b of the screen 1b.
70 is provided on the engaging recess 18 of the holding frame 180d.
1d, the width of the media of the holding frames 180b and 180d at the lower end and the left end can be reduced. Considering the degree of expansion and contraction of 170, the width was made slightly wider than the lower end and the left end by giving some margin.

Therefore, when forming a large screen, the media width of the holding frames 180a to 180d of the screen mounting frame 160 of the adjacent projection unit 100 is determined by a combination of the narrow width and the wide width. The image width is reduced as a whole by the amount.

Further, when the screen 170 is detached from the screen mounting frame 160, it becomes possible by removing at least two of the four sides of the screen, namely, the holding frames 180a and 180c on the upper end and the right end. And the holding frame 180 on the right end side
a, 180c side may be fixed with screws 240,
Not only can the number of screws 240 be reduced,
Upper and right end side holding frames 180a, 180c
The screen 170 can be replaced by the attachment and detachment of
Work man-hours can be simplified.

In this embodiment, the case where the holding frames 180a to 180d, which are the fixed frames, are of four types, up, down, left and right, has been described.
The left and upper and the right and upper may each be one type, for a total of two types. At that time, a play insertion hole is provided in one of the upper and lower or left and right facing fixed frames.

Further, in this embodiment, the case where the narrow medial portion is set to the left and lower portions is described. However, the present invention is not limited to this, and the narrow medial portion may be set to the right and lower portions. Further, in the present embodiment, as shown in FIGS. 12, 13, and 15, for example, the frames 161a to 161d of the screen mounting frame 160 have a thickness, so that the distal ends 182a of the holding frames 180a to 180d forming the medial portion. 182d, the projection light from the projector unit 200 is seen to be blocked. However, this is thick for convenience of explanation, and in fact, the frames 161a to The thickness of 161d is formed so as not to be affected.

[0054]

As described above, according to the projection unit and the multi-projection system of the present invention, the screen is fixed by at least two or more types of fixing frames provided on the front side of the tower type cabinet. In one type, a loose insertion hole is formed at a relative point where the other one of the fixing devices can be removed. Therefore, when the screen is replaced by removing the fixing frame, the loose insertion hole is formed adjacent to the inside of the cabinet through the loose insertion hole. Since the adjacent screens can be removed by removing the fixing frame screws on the two sides of the screen of the projection unit, the width of the image portion of the fixing frame can be made extremely small, and the screen can be easily removed from the front surface.

One type of fixed frame fixes two sides of the screen in a tangent state, and the other type has a width in consideration of the degree of expansion and contraction due to changes in the temperature and humidity of the screen. When a large screen is constructed, one type of fixed frame and another type are adjacent to each other, so that the image width of the adjacent fixed frame is determined by a combination of the narrow width and the wide width. Only the image width is reduced as a whole. Therefore, the image width when a large screen is formed can be reduced, and the number of fixed parts of the screen can be reduced, so that the number of parts can be reduced and the screen replacement operation can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a configuration of a conventional multi-projection TV.

FIG. 2 is a perspective view showing a cube-type projection unit of the multi-projection TV of FIG. 1;

FIG. 3 is a view showing a fixing structure of a screen of the projection unit of FIG. 2;

FIG. 4 is a perspective view showing a conventional tower type projection unit.

FIG. 5 is a perspective view for explaining a procedure of assembling the multi-projection TV of FIG. 4;

6 is a perspective view for explaining a method of fitting a projector unit inside a cabinet of the projection unit in FIG.

FIG. 7 is a perspective view showing a projection unit according to an embodiment of the multi-projection system of the present invention.

8 is a perspective view showing the projection unit in a state where the projector unit of FIG. 7 is removed.

FIG. 9 is a sectional view showing a slide member of the table of FIG. 7;

FIG. 10 is a plan view showing a slide member of the table of FIG. 7;

FIG. 11 is a perspective view showing a connection structure of respective frames constituting the cabinet of FIG. 7;

FIG. 12 is a sectional view showing a mounting structure of the screen of FIG. 7;

FIG. 13 is a sectional view showing a structure for mounting the screen of FIG. 7;

FIG. 14 is a perspective view showing a state where the projection units of FIG. 7 are stacked.

15 is a cross-sectional view for explaining removal of a screen in a state where the projection units of FIG. 7 are stacked.

FIG. 16 is a front view for explaining a media width of the projection unit in FIG. 7;

FIG. 17 is a perspective view for explaining a method of fitting the projector unit from the rear side of the cabinet of the projection unit in FIG. 7;

18 is a perspective view for explaining a method of fitting the projector unit from the front side of the cabinet of the projection unit in FIG. 7;

19 is a perspective view for explaining a method of fitting the projector unit from the front side of the cabinet of the projection unit in FIG. 7;

20 is a perspective view for explaining a method of fitting the projector unit from the front side of the cabinet of the projection unit in FIG. 7;

21 is a perspective view for explaining a method of fitting the projector unit from the front side of the cabinet of the projection unit in FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 projection unit 110 cabinet 160 screen mounting frame 170 screen 180 holding frame 200 projector unit 210 table 211 slide member 217 positioning member

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Saori Kishida 4-15-5 Omori Nishi, Ota-ku, Tokyo Inside Pioneer Corporation Omori Plant (72) Inventor Yasushi Ichihara 4--15 Omori Nishi, Ota-ku, Tokyo No. 5 Inside the Omori Plant of Pioneer Corporation (72) Inventor Jun Iizuka 4-15-5 Omori Nishi, Ota-ku, Tokyo Examiner of the Omori Plant Pioneer Corporation Kiyoshi Shigemasa (56) References 130495 (JP, A) JP-A-6-130494 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03B 21/10

Claims (2)

(57) [Claims] 1. A projector unit provided on the rear side of a turret type cabinet for projecting an image, and provided on a front side of the cabinet and receiving and diffusing a projected image from the projector unit. A screen and a screen mounting mounted in front of the cabinet
At least two or more types of fixing frames that are fixed to the screen by screws to the frame, and the other one of the fixing frames in one of the fixing frames is in the same direction.
Combination of multiple projection units with loose insertion holes formed at relative points that can be removed from
In the multi-projection system , the space of the one type of fixed frame is formed by screening the one type of fixed frame.
A screw that is screwed to the lean mounting frame is adjacent
Abuts one of the other fixed frames of the projection unit
Is formed to a degree that is not so large . One of the fixed frames of one projection unit
Projection adjacent to the projection unit
Adjacent to another type of unit fixing frame,
Another type of fixing of the adjacent projection unit
Loosen the screws fixing the frame to the screen mounting frame.
A multi- projection system characterized in that it can be removed from the same direction as one of the fixed frames . 2. The method according to claim 1, wherein one of the fixed frames is
The two sides of the screen are fixed in a tangent state, and the other
Species are the degree of expansion and contraction due to changes in temperature and humidity
Multi-projection system characterized in that the width is taken into account .