JPH07146516A - Screen device for multivision - Google Patents

Abstract

PURPOSE:To provide the structure of a screen frame having small width while considering the expansion and contraction of a screen and to improve the display quality of a picture on a multivision. CONSTITUTION:The screen item 2 is surrounded by recessed and projected frames 5 and 6 and constituted so that a screen edge may be exposed by the recessed part and it may be locked by the projected part. Material for locking the frames 5 and 6 is formed of the same material as the screen 2 or the frames 5 and 6 are pressed toward the center of the screen 2 by a spring so that space between the screen 2 and the frames 5 and 6 may be eliminated. Thus, joint width becomes 2.2mm and the display quality of the picture is improved in the core unit system multivision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core unit stacking type multi-vision screen device.

[0002]

2. Description of the Related Art A conventional multi-vision system having a large screen of 100 or 200 inches or more is a multi-vision system in which the core unit is piled up, and a light beam of an image projected from a projection tube is transferred to a lens assembly or a prism. A plurality of rear projection type televisions, each of which is reflected by a reflecting mirror or the like and projected on a transmissive screen, are arranged vertically and horizontally so that each screen is aligned so as to be located on the same plane.

And, the screen comrades next to each other are
Since the edges are connected to each other by being inserted into the groove of the frame of the predetermined screen, a plurality of the frames are exposed in a grid pattern in a large-screen screen device in which all the screens are combined. .

As a conventional technique of this type of screen device, for example, there is a projection image device and its assembling device described in JP-A-4-113789.

[0005]

However, in the above-mentioned conventional technique, the depth of the groove portion of the frame of the screen must be set larger than the insertion amount of the screen in consideration of expansion and contraction of each screen due to temperature or humidity. That is, since the depth of the groove of the frame must have a margin to absorb the amount of expansion of the screen, it is necessary to use a frame that is wide to some extent, and therefore, when viewing the screen. A part of the image is missing due to the frame,
There was a problem that the frame itself was an eyesore. In particular, when the number of individual screens is increased to make the screen larger, the number of frames increases, and when a high-definition image is displayed on the screen, the outline of the frame becomes clear, and a composite image is created by combining the images on each screen. Since a large number of the contact frames are exposed inside, it is unsightly, which has been a factor that hinders the improvement of the display quality of multivision.

The present invention has been made in view of the problems of the prior art, and an object thereof is to consider the expansion and contraction of the screen alone due to temperature or humidity and to determine the boundary of the screen alone from above, below, left and right. To provide a multi-vision screen device that can be fixed and integrated with adjacent frames to form a large screen and can use a single screen connection surface using a small frame that is stable and does not obstruct is there.

[0007]

In order to achieve the above-mentioned object, a multi-vision screen device according to the present invention has a groove portion of a frame for supporting and locking the outer periphery of a single screen item in a longitudinal direction of an outer edge portion of the single screen item. Intermittently,
In a state in which the frames are aligned vertically and horizontally so that the screen units of the core units are aligned on the same plane, the interrupted portions (the portions without the grooves) of the adjacent frames are the continuous portions (the grooves). The structure where the continuous part (the part with the groove) is engaged with the interrupted part (the part without the groove) so that the frame of the joint part of the screen unit can be seen continuously as a single plate in appearance. And there is no gap between the groove of the frame and the edge of the screen, and the frame moves in the expansion / contraction direction of the screen through a spring in a housing part made of a material having the same linear expansion coefficient as the screen. It is configured to be locked as much as possible.

The length of the wall forming the groove of the frame, which is located in front of the groove of the screen, is longer than the length of the wall of the rear surface of the groove of the screen, and an image is viewed through the screen. It is configured to be long when viewed.

Further, no gap is provided between the groove portion of the frame and the edge portion of the screen, and the frame is press-locked to the housing portion so as to be movable in the expansion / contraction direction of the screen through a spring.

[0010]

[Operation] When the core unit is assembled,
The non-grooved part of the adjacent frame of the single screen engages the grooved part of the frame, and the grooved part engages the non-grooved part so that the frame of the joint part of the screen unit can be seen as a single plate in appearance. Therefore, the width of the joint between the individual screens, that is, the width of the frame can be reduced. Further, no gap is provided between the groove portion of the frame and the edge portion of the screen, and the frame is movable in the expansion / contraction direction of the screen through a spring in a housing part made of a material having the same linear expansion coefficient as the screen. Since it is stopped, even if it contracts and expands due to temperature and humidity in the installation environment, the housing part also expands and contracts at the same time, so that thermal stress does not occur on the screen and the width of the frame can be made smaller at the same time.

The length of the wall located on the rear surface of the groove of the screen is longer than the length of the wall located on the front surface of the groove of the screen when the image is viewed through the screen. Therefore, the joint between the adjacent screens is not visible because it is hidden by the wall located on the rear surface of the groove of the screen and becomes linear.

No gap is provided between the groove portion of the frame and the edge portion of the screen, and the frame is pressure-locked to the housing portion via a spring so as to be movable in the expansion / contraction direction of the screen. Even if it contracts and expands due to temperature and humidity, it expands and contracts more than the spring force, so no thermal stress is generated on the screen, and the width of the frame can be made smaller at the same time.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Here, FIG. 1 is an external view of a single core unit of a multi-vision core unit stacking system, which is a first embodiment, and FIG. 2 is a schematic view of a cross section taken along line AA of FIG. 3 shows a schematic view of a cut surface taken along the line BB of FIG. 1, FIG. 4 shows a schematic view of the cut surface taken along the line CC of FIG. 1, and FIG. 5 shows a line DD of FIG. 6 is a schematic view of a cut surface along the line, FIG. 6 is an external view of a multi-vision obtained by assembling the core unit of FIG. 1, FIG. 7 is an enlarged view of a portion E of FIG. FIG. 8 shows a schematic view of a cut surface taken along the line HH of FIG. 7, and FIG. 9 shows an enlarged view of an E portion of the cut surface taken along the line GG of FIG.

FIG. 10 is an application example of the first embodiment and shows an enlarged view of the portion E of FIG. 6 viewed from the direction of arrow F, which corresponds to FIG. 7 of the previous figure, and FIG. 11 shows i of FIG. -Shows a schematic view of a section along the line i.

In these figures, reference numeral 1 indicates a screen unit which is a unit component of a multi-vision screen, reference numeral 2 indicates a lenticular sheet of reference numeral 3 and reference numeral 4.
5 shows a screen made of Fresnel lens sheet of
Indicates an inner frame, 6 indicates an outer frame, reference numeral 11 indicates a projection unit including a lens, a cathode ray tube, a power supply unit, and the like, and reference numeral 12 indicates a storage rack for storing the projection unit 11.

Next, reference numeral 8 is a frame made of the same material as the screen 2 or the same expansion coefficient, the symbol s indicates the thickness dimension of the inner frame 5, and the symbol t indicates the thickness dimension of the outer frame 6. , The symbol x indicates the shrinkage allowance of the inner frame 5 and the frame 8 due to the temperature or humidity in the horizontal direction, the symbol y indicates the shrinkage allowance of the inner frame 5 and the frame 8 due to the temperature or humidity in the vertical direction, and the reference sign 15 indicates a step A screw and 16 are springs.

Reference numeral 21 is a side plate, reference numeral 22 is a top plate, reference character M is a locking width of the outer frame 6 for locking the screen 2 in the front direction, reference numeral 31 is a mechanical screw, and reference numeral 3 is shown.
2 indicates an inner frame having a bent portion, and symbol SO indicates an apparent width of the inner frame 32 having a bent portion.

In the multi-vision having the above-mentioned structure, one projection unit 1
It is composed of a set of 1 and one accommodating rack 3 (a set of one screen unit, one projection unit, and one accommodating rack is abbreviated as a core unit for simplification of description). The core units are horizontally and vertically aligned so that the front surfaces of the screens 2 are aligned so that the screen units 1 of the respective core units are aligned on the same plane, and are vertically and horizontally aligned to form one multi-vision. In the screen unit 1, the outer periphery of the screen 2 is locked by the locking width M of the outer frame 6 in the front part and the outer peripheral direction, and the rear part is fixed by being stopped by the edge part of the inner frame 5, and the inner frame 5 and the outer frame are fixed. 6 is connected by a detachable means such as a screw (not shown), and the inner frame 5 or the outer frame 6 is a stepped screw 15 and a spring 1.
6, the structure is fixed to the frame 8 so that the symbols x and y can be moved by the amount.

As a result, when the screen 2 expands and contracts due to changes in ambient temperature and humidity, the frame 8 is made of the same material as the screen 2 or a material having the same coefficient of thermal expansion.
Expands and contracts by the same amount as the screen 2. Therefore, even if the front surfaces of the screen units 1 are aligned and the screen units 1 are aligned in the same plane, the screen 2 and the outer frame are aligned. It is not necessary to provide a gap between the blocks 6 which prevents the expansion direction of the screen 2 from being blocked by the outer frame 6 and causes buckling deformation.

Further, as shown in FIGS. 7, 8 and 9, the outer frame 6 of the screen unit 1 is formed by the edges of the outer frame 6 and the inner frame 5 that support and lock the outer periphery of the single screen 2. The grooves are discontinuously scattered in the longitudinal direction of the outer edge of the screen 2 alone, and the outer frame 6 is aligned vertically and horizontally so that the screen units 1 of the core units are aligned on the same plane. In the state, the intermittent portion of the adjacent outer frames 6 (that is, the portion without the groove formed by the edges of the outer frame 6 and the inner frame 5) is the continuous portion of the frame (that is, the edge of the outer frame 6 and the inner frame 5). A continuous portion of the adjacent outer frame (that is, a portion having a groove formed by the edges of the outer frame 6 and the inner frame 5) is formed in the interrupted portion (that is, the outer frame 6 and the inner portion). The joint portion of the screen unit 1 that engages with the grooveless portion formed at the edge of the frame 5). The outer frame 6 to look like a single plate appearance was shortened width of the seam portion of the screen unit 1.

Next, the screen unit 1 having the above structure
The fact that the width of the joint portion, that is, the width of the non-video band composed of the outer frame 6 and the inner frame 5 can be reduced, will be described below with specific numerical values.

In order to simplify the description below, the width of the joint portion of the screen unit 1, that is, the non-video tinge consisting of the outer frame 6 and the inner frame 5 is referred to as joint, and the width is referred to as joint width.

The inner frame 5 and the outer frame 6 are made of a metal material such as a steel plate in order to reduce joints as much as possible and in consideration of rigidity and strength during transportation, assembly and installation. It is possible to select 6 mm and the outer frame thickness t = 0.6 mm, and it is not necessary to provide a gap between the screen 2 and the outer frame 6 in consideration of expansion and contraction of the screen 2 due to changes in temperature and humidity.
Since it suffices if the screen 2 does not come off the outer frame 6, it is possible to select the locking width m of the outer frame 6 of 0.8 mm.

As shown in FIGS. 7 and 8, the joint width is t + 2 × M.
And substituting the above values into this formula, 0.6 + 2 × 0.
8 = 2.2, while the value of t + 2 × s is 0.6 + 2.
Since 0 × 0.6 = 1.8 mm, it can be seen that the joint width can be 2.2 mm.

In the first embodiment of the present invention, the joint width is intermittently 2.2 mm and 1.8 mm as shown in FIG. 7, but the outer frame 6 is locked as an application of the first embodiment. As shown in FIGS. 10 and 11, as an example in which the width is not shown intermittently, that is, the joint width is always made constant, the apparent width SO of the inner frame 32 having the bent portion is set to be the same as that of the outer frame 6. The width of the joint in this case may be selected to be slightly larger than the stop width m. Referring to FIGS. 10 and 11, the width of the joint is t +
2 SO, and s = 0.6 under the condition of SO> s, SO = 1.0 and t = 0.6 are selected and substituted into the above formula,
0.6 + 2.0 × 1.0 = 2.6, and the width of the joint in this case is 2.6 mm.

Next, a second embodiment of the present invention will be described below with reference to FIGS.

FIG. 12 is a perspective view showing the outer appearance of the screen unit according to the second embodiment of the present invention, FIG. 13 is an enlarged view of portion j of FIG. 12, and FIG. 14 is taken along the line KK of FIG. The schematic diagram of a cut surface is shown.

In these figures, the same elements as those in the previous figures are designated by the same reference numerals and symbols, and other reference numerals 101 are a screen unit, reference numeral 102 is a horizontal frame, 103 is a vertical frame, 104 is a frame, and 105 is a stepped screw. , 106 is a spring,
107 is a light-shielding rubber, and 113 is a tape.

The symbol L indicates the plate thickness of the horizontal frame 102 or the vertical frame 103, the symbol Q indicates the thickness of the tape, and the symbol R indicates the locking width of the screen 2 of the horizontal frame 102 or the vertical frame 103. A symbol T indicates a horizontal frame 102 and a vertical frame 103 of the light shielding rubber 107.
External dimensions when fixed to.

Similar to the first embodiment, the screen 2 of the screen unit having the above-described structure has the adjacent horizontal frames 102 or the vertical frames in a state where the screens 2 are aligned so as to be positioned on the same plane and are vertically and horizontally aligned. The part of the frame 103 having no frame and the adjacent part of the horizontal frame 102 or the part having the frame of the vertical frame 103 are engaged with each other, and the horizontal frame 1 at the joint portion of the screen 2 is engaged.
02 or vertical frame 103 so that it looks like a single plate,
The width of the joint portion of the screen 2 is shortened, and the core units are arranged so that the entire surfaces of the screen 2 are aligned in the horizontal and vertical directions as in the first embodiment so that the core units 101 are located on the same plane. In this state, multi-vision is formed by arranging the core units vertically and horizontally, and the core units are aligned horizontally and vertically so that the front faces of the screens 2 are aligned so that the screen units 101 of the respective core units are located on the same plane. Are aligned vertically and horizontally to form one multi-vision, and the screen unit 101
The horizontal frame 102 and the vertical frame 103 lock the outer periphery of the screen 2 with the locking width R in the front part and the outer peripheral direction, and the rear part frame 104.
The horizontal frame 102 and the vertical frame 103 are fixed to the frame 104 by a stepped screw 105 and a spring 106 so as to be movable by the amounts of the symbols x and y.

As a result, when the screen 2 expands and contracts due to changes in ambient temperature and humidity, the screen 2, the horizontal frame 102, and the vertical frame 103 expand and contract by the spring 106. It is not necessary to provide a gap between the frames 103 in consideration of expansion and contraction of the screen 2 due to changes in temperature and humidity.

A light-shielding tape 113 is attached to the corners of the screen 2 or the entire outer circumference thereof, and the screen 2 expands due to the ambient temperature and humidity, so that the horizontal frame 102 and the vertical frame 103 are formed.
The image light of the projection unit 11 is prevented from leaking to the outside by being exposed from the corners where the lines intersect with each other and impairing the appearance.

When assembled as a multi-vision, the light shielding rubber 107 surrounding the outer periphery of the screen unit 101 prevents external light from leaking from the rear surface or the top surface between the core units or between the screen units 101.
Elastically deforms to prevent gaps.

Also in the second embodiment, as in the first embodiment, the joint width is expressed by the following formula: L + 2 × RL (plate thickness of the horizontal frame 102 or the vertical frame 103) = 0.6 R (horizontal frame) 102 or vertical frame 103 locking width of the screen 2) = 0.6 is substituted into the above equation, 0.6 + 2.0 ×
Since 0.6 = 1.8, it can be seen that the joint width is 1.8 mm.

Next, a third embodiment of the present invention will be described below with reference to FIGS.

FIG. 15 is a perspective view of the appearance of a screen unit according to a third embodiment of the present invention, and FIG. 16 is a front view of the screen unit shown in FIG. FIG. 17 is a front view showing the upper and lower boundaries of each screen unit in this state, and FIG. 17 is a schematic view of a cross section taken along line U-U of FIG.

In these figures, reference numeral 201 is a screen unit, reference numeral 202 is an upper frame, 203 is a lower frame, and 204.
Is a left frame, 205 is a right frame, 206 is a screen end surface, reference numeral 212 is an upper frame convex surface, 222 is an upper frame concave surface, and reference numeral 21
3 is a lower frame convex surface, 223 is a lower frame concave surface, reference numeral 214 is a left frame convex surface, 224 is a left frame concave surface, reference numeral 215 is a right frame convex surface, 225 is a right frame concave surface, and reference numeral 218 is a frame 219. Is a stepped screw, 231 is a lenticular sheet, 232 is a Fresnel lens sheet, and 236 is a spring.

In the screen unit having the above structure, the end face 206 of the screen 201 made of the lenticular sheet 231 and the Fresnel lens sheet 232 is intermittently locked by the upper frame 202, the lower frame 203, the left frame 204, and the right frame 205 without a gap. As shown in FIG. 16, at the boundary between vertically adjacent screen units, the convex surface 212 of the upper frame 202 and the lower frame concave surface 223 of the lower frame 203 are the left frame 204 and the concave surface 22 of the upper frame 202.
2 and the lower frame convex surface 213 of the lower frame 203 are engaged with each other, and the boundary between the screen units adjacent to each other on the left and right as shown in FIG. 16 is the left frame convex surface 214 of the left frame 204 and the right frame concave surface 22 of the right frame 205.
5, the left frame concave surface 224 of the left frame 204 and the right frame convex surface 215 of the right frame 205 engage with each other to reduce the width of the joint.

The specific joint width is t + 2 from FIGS.
It is represented by W, and its value is t = 0.6 similarly to the first and second implementations.
Substituting W = 0.6, we get 0.6 + 2 × 0.6 = 1.8 1.8 mm.

[0041]

As described above, according to the present invention, the width of the non-image band, that is, the joint width, which divides the single multi-vision screen of the core unit stacking type, is 2.2 mm.
Since it can be realized with a short length (the joint width on one side is 1.1 mm), the display quality of a multi-vision image is significantly improved.

Since the screen is not deformed by the ambient temperature or humidity, it has the effects of improving the design value of the screen and improving the appearance of the image without causing distortion in the image due to the deformation.

[Brief description of drawings]

FIG. 1 is an external view of a single core unit of a multi-vision multi-vision core unit as a first embodiment.

FIG. 2 is a schematic view of a cross section taken along the line AA of FIG.

FIG. 3 is a schematic view of a cross section taken along the line BB of FIG.

FIG. 4 is a schematic view of a cross section taken along the line CC of FIG.

5 is a schematic view of a cross section taken along line D-D in FIG. 1. FIG.

6 is an external view of a multi-vision system in which the core unit of FIG. 1 is assembled.

7 is an enlarged view of part E of FIG. 6 viewed from the direction of arrow F. FIG.

FIG. 8 is a schematic view of a cross section taken along line HH of FIG.

9 is an enlarged view of an E portion of a cut surface taken along the line GG in FIG. 6 as viewed from the arrow F direction.

FIG. 10 is an enlarged view of part E of FIG. 6 viewed from the direction of arrow F in an application example of the first embodiment.

11 is a schematic view of a cross section taken along line ii of FIG.

FIG. 12 is a perspective view of the appearance of a screen unit according to a second embodiment of the present invention.

FIG. 13 is an enlarged view of a portion j in FIG.

FIG. 14 is a schematic view of a cross section taken along line KK of FIG.

FIG. 15 is a perspective view of the appearance of a screen unit according to a third embodiment of the invention.

16 is a front view showing the upper and lower boundaries of each screen unit in the state where the screen units shown in FIG. 15 are aligned so that their front surfaces are located on the same plane and are aligned vertically and horizontally.

FIG. 17 is a schematic view of a cross section taken along line U-U in FIG. 16.

[Explanation of symbols]

1 ... Screen unit, 2 ... Screen, 3 ... Lenticular sheet, 4 ... Fresnel lens sheet, 5 ... Inner frame,
6 ... Outer frame, 8 ... Frame, 15 ... Stepped screw, 16 ... Spring, 32 ... Inner frame having bent portions, 101 ... Screen, 102 ... Horizontal frame, 103 ... Vertical frame, 104 ... Frame,
105 ... Stepped screw, 106 ... Spring, 107 ... Light shielding rubber, 113 ... Tape.

Claims (2)

[Claims] 1. A projection unit having a projection unit made of a projection type cathode ray tube, and an optical means such as a reflecting mirror or a lens for guiding the projection light from the projection unit to a screen, and the projection light of the projection unit. A set of a screen unit consisting of a screen for displaying the projection unit and a storage rack equipped with means for locking the projection unit or the screen unit to a localization value (the projection unit, the screen unit and the storage rack will be referred to as a core unit hereinafter). ) In the multi-vision to form a large screen by aligning the front of the screen unit and aligning each screen unit in the same plane so that each screen unit is aligned in the same plane, the outer periphery of the four sides of the screen, Each of the screens has an intermittent groove whose longitudinal direction is the outer edge of the screen, that is, there is no grooved portion. The parts are scattered, the part with the groove forms the outside of the screen frame, and the part without the part has the outer peripheral edge of the screen exposed, and is inserted into the groove of the formed screen frame (hereinafter referred to as the frame), In a state where the screen units of the core unit are aligned so as to be located on the same plane and are vertically and horizontally aligned, the interrupted portions (the portions without the grooves) of the adjacent frames are the continuous portions (the grooves). The continuous part (the part with the groove) is engaged with the interrupted part (the part without the groove) so that the frame of the joint part of the screen unit can be seen continuously as a single plate in appearance. This is a multi-vision screen device. 2. The center direction of the screen located on the rear surface of the groove of the screen according to the length of the wall extending in the center direction of the screen located in front of the groove of the screen forming the groove of the frame. A multi-vision screen device, characterized in that the length of the wall extending to the longer side is longer when the image of the projection unit is viewed through the screen.