JP3003399B2 - Combination projection display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a screen fixing device of a combination projection display device.

[0002]

2. Description of the Related Art In order to realize a large screen with a small depth, a conventional combination type projection display device reflects light rays of an image with an optical component such as a lens assembly or a prism, and further reflects the light rays with a reflecting mirror. A plurality of projection display units each configured to project an image on a screen are assembled vertically, horizontally, and horizontally with the front-rear direction of the screen being aligned.

An example of this type of apparatus is disclosed in, for example,
-88976 multi-plane multi-linear projector.

[0004]

In the above-mentioned prior art, the projection display devices are individually combined and the individual screens are connected side by side. Therefore, the width of the frame for fixing the screen is the same as that of the projection display device alone. Since the width of the frame is doubled and the engagement width of the frame is increased in anticipation of the thermal expansion of the screen, the width of the frame is further increased, and there is a problem that images, characters and the like on the screen are lost, making it difficult to see. Also, the appearance of high-definition broadcasting increases the sharpness of the screen, so that the frame fixing the screen is more conspicuous and makes it difficult to see the screen.

SUMMARY OF THE INVENTION An object of the present invention is to provide a combination projection display device in which the frame width of the projection display device is reduced in consideration of thermal expansion so that the screen can be easily viewed.

[0006]

In order to achieve the above-mentioned object, an elastic member is used to elastically deform the frame fixing the screen of the projection display device alone in the thermal expansion direction of the screen, and the amount of thermal expansion is reduced. The width of the screen locking the frame is reduced, the end face of the screen is fixed by the frame, and the outer shape of the frame is adjusted to the outer size of the projection display device alone at the lowest operating temperature.

[0007]

[Function] Since the external dimensions of the frame are adjusted to the external dimensions of the single unit of the front projection display device when the operating temperature is the lowest, the width of the frames does not change due to the thermal expansion of the screen, and the elastic members are used. Since the outer shape is changed, the width of the frame can be kept small.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of the appearance of a single projection type display device of a combination projection type display device according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is an exploded view of a portion for fixing the screen of FIGS.

In each of the figures, 1 denotes a projection display device alone, 2 denotes a lenticular sheet, 3 denotes a Fresnel lens sheet, 4 denotes left and right frames, 5 denotes upper and lower frames, 6 denotes set screws, 7
Denotes left and right frames, 8 denotes upper and lower frames, 9 denotes cover, 10
Denotes a frame fixing screw, W denotes a width dimension between outer sides of the left and right frames 4 when the lenticular sheet 2 and the Fresnel lens sheet 3 are fixed to the left and right frames 4, and H denotes an upper and lower frame of the lenticular sheet 2 and the Fresnel lens sheet 3. 5 shows the vertical dimension of the outside of each other, and the dimension S1 shows the width of the locking portion where the left and right frames 4 and the upper and lower frames 5 lock the four sides of the lenticular sheet 2 and the Fresnel lens sheet 3; The lenticular sheet 2 and the Fresnel lens sheet 3 are provided with fixed portions of the upper and lower frames 5 fixed by the frame fixing screws 10.
The length of the beam assuming a cantilever beam with the portion where it is locked as the free end, and t indicates the plate thickness.

In each of the figures, the screen of the projection type display device 1 is composed of a lenticular sheet 2 and a Fresnel lens sheet 3 which are overlapped with each other. The parts are also locked by upper and lower frames 5 having a U-shape, and the left and right frames 4 and the upper and lower frames 5 are made of an elastic member such as a metal spring material.
The left and right frames 4 are engaged with the left and right frames 7 with frame set screws 10, the left and right frames 7 are locked with the cover 9 with set screws 6, and the upper and lower frames 5 are engaged with the upper and lower frames 8 with frame set screws 10. The frame 8 is locked to the cover 9 by a set screw 6. As a result, the screen in which the lenticular sheet 2 and the Fresnel lens sheet 3 are overlapped is locked to the cover 9 via the left and right frames 4 and the upper and lower frames 5 made of elastic members. Further, the outer shape width W of the left and right frames 4 and the width W of the cover 9 are the same, the outer shape of the upper and lower frames 5 and the height H of the cover 9 are the same, and the frames 4 and 5 made of the elastic members are used as the lenticular sheet 2. And the Fresnel lens sheet 3 are pressurized, and the length l, the plate thickness t, and the thinned portions 4a and 5a in the figure are provided to set the pressing force of the left and right frames 4 and the upper and lower frames 5; Sheet 2 and Fresnel And the right and left frame 4 for locking Nzushito 3 to lock the width S1 of the upper and lower frame 5 in the longitudinal direction take minimal engagement amount.

The screen composed of the lenticular sheet 2 and the Fresnel lens sheet 3 of the projection type display device 1 having the above-described structure, even if expanded in the plane direction due to the temperature change of the use environment, has the left and right frames 4 and the upper and lower frames 5. The range of l can be expanded to reach the gap between the left and right frames 7 or the upper and lower frames 8 due to elastic deformation.

Therefore, the width dimension S1 of the locking portion between the left and right frames 4 and the upper and lower frames 5 does not have to take into account the thermal expansion of the lenticular sheet 2 and the Fresnel lens sheet 3. The lenticular sheet 2 and the Fresnel lens sheet 3,
The width in the expansion direction is approximately 800 mm and the operating temperature changes 50
℃, thermal expansion coefficient 8 × 10 ~ ⁵ , the expansion amount is about 3.
5 mm, and the S1 is usually 5 mm and the expansion amount is 3.
5 mm is omitted because the left and right frames 4 and the upper and lower frames 5 can be elastically deformed and bent, and S1 is 5 mm to 3.5 mm.
As a result, S1 = 1.5 mm, so that S1 can be reduced to a size of 1/3 or less.

Next, an example of a combination projection display device obtained by combining the projection display devices 1 described above will be described in detail with reference to the drawings.

FIG. 4 is a schematic view of an external appearance of a combined projection display device obtained by combining the projection display devices 1 according to one embodiment of the present invention, and FIG. 5 is a BB line of FIG. 6 is a schematic view of a cross section taken along line CC of FIG.

In each of the drawings, the same reference numerals are given to the same components as those in the previous drawings.
Indicates bolts, 14 indicates connection fittings, and (b) and (c) in the drawings indicate the directions of thermal expansion of the lenticular sheet 2 and the Fresnel lens sheet 3.

In each of the figures, the projection type display device 1 has a front surface of the lenticular sheet 2, the left and right frames 4, the upper and lower frames 5, or the left and right frames 7, 8, which are in contact with each other, and a connection fitting 14 with a bolt 13. Projection-type display device 1 separately locked via
Is installed on the floor 11 via the legs 12.

The width 2S1 of the adjacent left and right frames 4 of the combined projection type display device having the above-mentioned structure is indicated by an arrow (b) in the figure due to thermal expansion of the lenticular sheet 2 and the Fresnel lens sheet 3 as shown in FIG. Left and right frame 4 even if expanded in the direction
In the projection type display device separately 1 described above only the 2S1 dimension no change in may be locking the lenticular sheet 2 and the Fresnel lens sheet 3 in size, not containing the thermal expansion amount itself is moved in the arrow (b) direction The width is 2S1 which is twice as large as the width S1 of the left and right frames 4 and the locking portion, so that a size less than 1/3 of the conventional one can be realized.
1 also, as shown in FIG. 6, the projection display device separately 1 described above
In this case, the width of the locking portion with the upper and lower frames 5 is 2S1 which is twice as large as the width of the locking portion with the upper and lower frames 5, and a size of 1/3 or less of the conventional size can be realized.

Next, an applied embodiment of the combination projection display apparatus according to one embodiment of the present invention will be described with reference to FIGS.

FIGS. 7 to 9 show application examples of the left and right frames 4, the upper and lower frames 5, the right and left frames 7, and the upper and lower frames 8 of the combination projection display apparatus according to one embodiment of the present invention. In each of the corresponding drawings, the same reference numerals are given to the same components as those in the previous drawings, and the other 15 is an outer frame, 16
Is a set screw, 17 is an inner frame, symbol S2 is a width dimension of a locking portion of an outer frame 15 for locking the lenticular sheet 2 and Fresnel lens sheet 3, 18 is a left and right upper and lower frame,
19 is an outer frame, 20 is a set screw, 21 is a spacer,
22 is a spring, 23 is a cover, 24 is a transparent frame, 25
Denotes a set screw, 26 denotes a frame, 27 denotes a set screw, 28 denotes a spacer, and 29 denotes a cover.

In FIGS. 7 and 8, the outer frame 15 and the left and right upper and lower frames 18 correspond to the left and right frames 4 and the upper and lower frames 5 in FIG. 2. The outer frame 15 in FIG. The frame 18 is made of a material close to a rigid body, and the left, right, upper and lower frames are formed by a spring 22 on the lenticular sheet 2 and the Fresnel lens sheet 3.
It can be seen that the same effect as the embodiment of FIG. 2 can be obtained by moving due to the thermal expansion of FIG. 2, and FIG. 9 also shows the same effect as the embodiment of FIG. 2 by locking the transparent frame 24 to the frame 26 made of an elastic member. It can be seen that the effect can be obtained.

[0022]

According to the present invention, the width of the frame for partitioning and fixing each screen of the combination projection type display device is set to one of that of the conventional device.
Since it can be reduced to / 3 or less, there is an effect that the screen becomes much easier to see.

Also, there is a remarkable effect that the screen is more visible as the image is more clearly displayed such as a high-definition image.

[Brief description of the drawings]

FIG. 1 is a perspective view of the appearance of a single projection display device according to an embodiment of the present invention.

FIG. 2 shows a schematic view of a section along the line AA of FIG. 1;

FIG. 3 is an exploded view of the screen fixing part of FIGS. 1 and 2 showing a main part of the present invention.

FIG. 4 is a schematic front view of an external appearance of a combination projection display device according to an embodiment of the present invention.

5 shows a schematic view of a section along the line BB in FIG. 4;

6 shows a schematic view of a section along the line AA in FIG. 4;

FIG. 7 shows a schematic diagram of a section along the line AA of FIG. 1 showing an application example of the invention.

FIG. 8 also shows a schematic view of a section.

FIG. 9 also shows a schematic view of a section.

[Description of Signs] 1 … Projection-type display device alone 2… Lenticular sheet
3 ... Fresnel lens sea, 4 ... left and right frame, 5 ... upper and lower frame, 6
... Set screw, 7 ... Left and right frame, 8 ... Top and bottom frame, 9
... cover, 10 ... frame screw, 11 ... floor, 12 ... leg, 1
3 ... bolt, 14 ... connecting bracket, 15 ... outer frame, 16 ... set screw, 17 ... inner frame, 18 ... left and right upper and lower frame, 19 ... outer frame, 20 ... set screw, 21 ... spacer, 22 ... spring, 23 ... Cover, 24 ... Transparent frame, 25 ... Set screw, 26 ... Frame, 27 ... Set screw, 28 ... Spacer, 29
…cover.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-103436 (JP, U) JP-A 1-55784 (JP, U) JP-A 4-16444 (JP, U) JP 2-U 19799 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 21/56, 21/62 H04N 5/74

Claims (4)

(57) [Claims] 1. A combination projection display device comprising a plurality of projection display devices each having a cathode ray tube, a lens, and a screen, wherein a support frame for supporting the screen is provided. The left and right frames for locking the outer edge portion and the upper and lower frames for locking the upper and lower outer edge portions of the screen are each formed of a cantilevered elastic material having a concave screen locking portion at a tip end thereof, Is thicker due to the left and right frames and the upper and lower frames
The elastic restoring force of the elastic material in both the
A combination projection display device characterized in that it is supported in a pressurized state . 2. A combined projection display device comprising a plurality of projection display devices each having a cathode ray tube, a lens, and a screen, comprising: a support frame for supporting the screen; The left and right frames for locking the outer edge and the upper and lower frames for locking the upper and lower outer edges of the screen each have a concave screen locking portion at the distal end, and the other end is on the fixed body side.
A fixed elastic material The formed support frame, an elastic member disposed between said support frame and the fixed body (2
2) and wherein the screen is thickened by the left and right frames and the upper and lower frames.
The elastic restoring force of the elastic material in both the
A combination projection type display characterized in that the left and right frames and the upper and lower frames are supported on the fixed body side by the elastic restoring force of the elastic member (22) while being supported in a pressurized state. apparatus. 3. The combination projection display according to claim 1, wherein said left and right frames and said upper and lower frames are made of a transparent material. 4. The left and right frames and the upper and lower frames are plate-like members.
3. The combination projection display device according to claim 1, wherein a hole is provided in a plane portion between the portion supported by the fixed body and the screen locking portion.