JP3440611B2 - Portable screen - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen used for displaying an image enlarged and projected by a projection type display device or the like, and more particularly to a screen suitable for a portable screen of small size which is easy to carry. It relates to a support mechanism.

[0002]

2. Description of the Related Art FIG. 10 shows a commonly used self-supporting screen. As shown in this figure,
The screen 100 has a rectangular screen panel 102.
And a two-legged stand (support mechanism) 103 that supports this in a vertical state. Such a screen is generally large, and casters for movement are attached to both legs of the stand so that it can be moved to a desired place.

However, such a large screen has a limitation in its installation place and is inconvenient in that it cannot be put in a room having a narrow entrance.

For this reason, it has recently been considered to use a small screen of about 40 inches or 60 inches. Such a small screen can be easily carried and can be placed on a desk or the like to view the projected image.

[0005]

However, a stand (support mechanism) suitable for such a small screen has not been proposed. If you use a stand similar to a large screen, it will take up space, which is inconvenient to carry and cannot be placed on a desk or the like. Furthermore, in the case of a small screen,
It is desirable to reduce the weight of the screen panel because the portability is emphasized unlike the large size. But,
Generally, when the weight is reduced, the panel rigidity is reduced accordingly. Therefore, as a supporting mechanism for such a small screen having excellent portability, it is necessary to adopt a mechanism that is convenient for carrying and is also suitable when considering the panel strength.

An object of the present invention is to pay attention to such a point,
It is to propose a supporting mechanism suitable for a portable screen panel.

[0007]

A first screen of the present invention has a rectangular screen panel and a support mechanism for supporting the screen panel, and the screen panel is a panel. The main body plate, the rectangular frames arranged on the four peripheral edges of the panel main body plate, and the upper and lower frames of the rectangular frame on the back surface side of the panel main body plate are bridged in a direction substantially orthogonal to these. A configuration having at least two first and second reinforcing members is adopted. As the support mechanism , at least the support mechanism is
Also has one end attached to said first or second reinforcement member
Support member and legs attached to multiple ends of said support member
The leg member is provided with a length direction of the leg member near the center.
A long hole extending in the same direction is formed.
The screw that penetrates the hole should be screwed into the lower frame of the rectangular frame.
Therefore, it is fixed to the rectangular frame .

The second screen of the present invention has a rectangular shape.
Stand up the screen panel and this screen panel
And a supporting mechanism for supporting the
The structure includes at least one swivel leg and the screen pad.
Equipped with a bracket attached to the back of the flannel so that it can rotate freely
The swivel foot is fixed to the bracket.
The pivoting leg and the bracket are
The storage state that extends along the screen panel and the screen
A screen extending in a direction orthogonal to the lean panel
It is a structure that can be swung between the panel support state.

Further, the second screen of the present invention is
The bracket is used when the swivel leg is in the retracted state.
Velcro on the surface facing the screen panel
And a magic table equipped with the bracket.
The velcro that engages with the screen is the screen panel.
It is preferably provided on the back side of.

Furthermore, another screen of the present invention is
The support mechanism, together with the swivel leg, is used for the screen panel.
It is preferable to provide auxiliary legs for supporting the three points.

Furthermore, the first and second screens of the present invention
A structure with a polarizing plate attached on the reflective surface of the lean panel.
Preferably. For example, the liquid crystal projector
The image light is polarized like this, and the polarization component of the light is unidirectional.
If they are the same, the
Install a polarizing plate on the screen panel to block the polarized light.
Affix it to the surface. In this way, a bright room etc.
When viewing an image on the
Half the light that is incident on the lean (hereinafter referred to as "outside light")
You can cut off minutes. As a result of this, color is traditionally affected by the effects of ambient light.
The reproducibility becomes narrow and the contrast becomes low
That has been deteriorated can block half of the external light,
Wider reproducibility, better contrast, better image quality
Go up.

[0012]

[0013]

In the first portable screen of the present invention, since the four peripheral edges of the panel body plate are surrounded by a frame and a plurality of reinforcing members are vertically arranged between the upper and lower frames, the panel rigidity is improved. It is enough. Together with this, such a reinforcing member, or the portion of the lower frame to which it is connected,
Since the legs constituting the support mechanism are attached, even if a force is applied to such attachment portions, these portions will not be deformed or damaged. Therefore, it is possible to secure a panel rigidity that can withstand carrying and also a supporting mechanism can be configured to be strong by utilizing a reinforcing member for securing the panel rigidity. Furthermore, in general, the projection of a projection display device
The light should be slightly above, not perpendicular to the screen's reflective surface.
Incident in the direction. Therefore, the light reflected from the screen is slightly
Reflect upwards. As a result, they are facing the screen
For the observer, the upper side of the screen is dark and the lower side is
The image becomes brighter and has a difference in brightness. This lack
Panels in slots formed in the leg to eliminate points
Move the fixing position of the lower frame of the main body and the leg material arbitrarily,
Standing screen panel vertically to the installation surface
It can be adjusted to a slightly forward leaning posture.

In the second portable screen of the present invention, the legs constituting the support mechanism can be swung, so that the portable screen can be stored and kept out of the way when it is carried, and portability is improved.
Can be improved. Also, make sure that the swingable legs are fixed to the bracket.
And support the screen stably, and
The turning can be operated easily. Furthermore, the support mechanism is configured.
When the swivel leg is in the stowed position,
The back of the awn is fixed with Velcro
So, the swivel leg swivels carelessly when carrying the screen
It can be prevented from popping out. further,

In addition to this, the first and second embodiments of the present invention
For band screens, the surface of the screen panel
As it uses a structure with a polarizing plate attached, bright areas
Even in shops, it can block half of the outside light and has wide color reproducibility.
And the advantage of being able to realize high-contrast images
is there.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a portable screen which is an embodiment of the present invention. The portable screen 1 has a rectangular screen panel 2 and a support mechanism 3 for supporting the screen panel 2. The screen panel 2 is a rectangular panel body plate 21.
A rectangular frame 22 arranged at the four peripheral edges of the panel body plate 21, and between the upper frame 221 and the lower frame 222, which are the constituent elements of the rectangular frame 22, on the back surface side of the panel body plate 21. It is provided with stays 231 and 232 that are two reinforcing members bridged in a direction orthogonal to each other.

The support mechanism 3 has left and right legs 31 and 32 extending in a direction orthogonal to the screen panel. The legs 31 and 32 have the same structure, and the lower frame 222 is
And the horizontal leg member 33 attached to the lower surface of the
The support arm 34 extends obliquely from the rear end of the panel 3 toward the rear surface of the panel.

The screen panel 2 has a three-layer structure in which a reflection plate made of aluminum or the like is arranged on the front surface side, the front surface is covered with a protective film, and a support plate is attached to the rear surface side. Has become. Such a structure is a structure generally used in the past. The rectangular frame 22 is composed of upper and lower frames 221, 222 and side frames 223, 224 connecting both ends thereof vertically. For these frames, for example, an aluminum extruded product can be used. In this example, corner resins 225 are attached to the four corners to smoothly connect the joints of the frames.

The structure of the stays 231 and 232 will be described with reference to FIG. Since these have the same structure, only one stay 232 will be described. The stay 232 is a molded product made of aluminum or the like having a U-shaped cross section, and L-shaped brackets 233, 234 made of aluminum or the like are screwed to the left and right side surfaces at the upper end thereof. The stay 23 is connected through the pair of brackets 233 and 234.
The upper end of 2 is screwed to the lower surface of the upper frame 221.
Similarly, the lower end portion of the stay 232 is also screwed to the upper surface of the lower frame 222 by a pair of left and right L-shaped brackets 235 and 236. Here, at the height position below the middle of the stay 232 in the vertical direction, both side surfaces 232 of the stay 232 are located.
A shaft hole 232c of the arm connecting shaft is formed in a and 232b, and the arm connecting shaft 41 (see FIG. 5) is provided between them.
Are laid horizontally.

FIG. 3 shows the support arm 34. The support arm 34 is also a molded product made of aluminum or the like having a U-shaped cross section, and the above-mentioned arm connecting shaft 4 is provided on both side surfaces of its upper end.
A shaft hole 34a for rotatably receiving 1 is formed. Therefore, the support arm 34 is rotatably connected to the middle position of the stay 232 via the arm connecting shaft 41. The shaft hole 3 is also formed on both side surfaces of the lower end of the support arm 34.
4b is formed. A horizontal leg connecting shaft 42 (see FIG. 5) is bridged here.

On the other hand, FIG. 4 shows a horizontal leg member 33. As shown in this figure, the horizontal leg member 33 can be formed using, for example, a stripped aluminum material. At the rear end of the horizontal leg member 33, there is formed a shaft hole 33a through which the horizontal leg connecting shaft 42 is rotatably passed. Therefore, the rear end of the horizontal leg member 33 is in a rotatable state, and the connecting shaft 42 is rotatably supported. Is connected to the lower end of the support arm 34 via. A long hole 33b extending in the front-rear direction is formed in the upper and lower surfaces of the horizontal leg member 33 at a middle position in the front-rear direction. Here, the horizontal leg fixing screw 5 is inserted from below. Here, on the lower surface of the lower frame 222 of the screen panel, the horizontal leg fixing screw 5 is attached to the portion where the horizontal leg member 33 is located.
Screw holes 51 (see FIG. 5) are formed.

FIG. 5 shows the mounting state of the leg 32. As shown in this drawing, the upper end of the support arm of the leg 32 is rotatably connected to the stay 232 via the arm connecting shaft 41, and the lower end of the support arm is horizontal via the horizontal leg connecting shaft 42. It is rotatably connected to the rear end of the leg member 33. Therefore, the horizontal leg member 33 can be fixed to the lower surface of the lower frame 222 by screwing the fixing screw 5 at an appropriate position in the long hole 33b formed in the horizontal leg member 33.

Here, in this example, as shown in FIG. 6, when the fixing screw 5 is fastened at the front end position of the elongated hole 33b, the screen panel 2 stands upright with respect to the horizontal leg member 33. It is designed to be installed in a posture. However, when fastened at the rear end position of the elongated hole 33b, the front end is slightly inclined. As described above, the support mechanism 3 of the present example has a posture adjusting function that can tilt the screen panel 2 from the upright posture to the forward leaning posture by shifting the fastening position of the fixing screw 5 back and forth.

In the screen 1 of the present embodiment constructed as described above, the two legs 31 and 32 thereof are respectively provided with two stays 231 and 23 for reinforcing the panel body plate 21.
2 and the lower frame 222 at the mounting positions of these stays. Therefore, the rigidity of the panel body plate 21, particularly the out-of-plane rigidity can be secured by the two stays, and a panel having rigidity that can be carried can be realized. At the same time, since the reinforcing stays are used as the leg mounting portions, it is possible to realize a supporting mechanism having high strength.

Further, the support mechanism 3 of the present embodiment can adjust the posture of the screen panel so that it is in a forward tilted posture which is slightly tilted forward from the vertical state. Therefore,
As shown in FIG. 6, the screen panel 21 can always be adjusted to an appropriate posture with respect to the upward projection light L from the projection display apparatus P. Therefore, it is possible to avoid the occurrence of a contrast difference in which the upper portion of the screen becomes dark and the lower portion becomes bright.

In this example, two stays 23
Although 1, 232 are attached, three or more stays may be attached. Also, three or more legs 31 and 32 may be attached.

Further, the screen panel 2 of this example has a reflection plate made of aluminum or the like arranged on the front surface side thereof, the front surface thereof being covered with a protective film, and a support plate attached to the rear surface side thereof. It has a layered structure. In addition to this configuration,
A four-layer structure having a polarizing plate attached to the front surface can be used. For example, when the image light is polarized like a liquid crystal projector and the polarization components of the light are unified in one direction, the polarization component should be polarized to block the polarization component perpendicular to the polarization component of the projection device. A configuration in which the plate is attached to the screen panel surface can be adopted.

With this arrangement, when an image is viewed in a bright room or the like, it is possible to block half of the external light incident on the screen from a part other than the projection device. As a result, although the color reproducibility has been narrowed due to the influence of external light or the image quality has deteriorated due to low contrast in the past, half the external light can be blocked, resulting in wider color reproducibility and better contrast. Also improves and the image quality improves.

(Second Embodiment) FIGS. 7 and 8 show another example of a support mechanism for a portable screen. The screen 70 of this example is characterized in that a support mechanism 72 that supports the rectangular screen panel 71 includes a pair of swivel horizontal legs 73 on the left and right of the lower surface of the screen panel 71. FIG. 7 (a) shows a case where the horizontal leg 73 is turned to be in a panel installation state.
(B) shows a case where they are swung and housed under the panel.

FIG. 8 shows such a swing type horizontal leg 73.
The swivel mechanism is shown. As shown in this figure, a bracket 74 is pivotally connected to the lower end of the back surface of the screen panel 71 by a pair of upper and lower hinges 75,
A horizontal leg 73 is horizontally fixed to the lower end of the bracket 74. Furthermore, a velcro tape (product name) 76 is attached to the back surface of the screen panel 71. Also on the bracket 74 side, a magic tape 77 is attached to a position just hitting the magic tape 76. Therefore, the horizontal leg 73 is shown in FIG.
In the storage state as shown in (4), these magic tapes 76 and 77 are engaged with each other, and the horizontal leg 73 is fixed to the panel side so as not to rotate.

As described above, in this embodiment, the swing-type horizontal leg 73 is attached to the lower end of the screen panel 71. Therefore, the screen panel can be installed without using a stand such as a tripod. Also, since it is a swivel type, it can be put in a stored state so as not to get in the way when carrying it.

Here, also in the support mechanism having the turning type horizontal leg as in this example, an adjusting function for tilting the screen panel forward can be provided. For example, horizontal leg 7
Although 3 is fixed to the lower end of the bracket 74, instead of this, the horizontal leg 73 may be fixed to the bracket 74 in the horizontal state and in a state slightly inclined from the horizontal. As such a mechanism, for example, the horizontal leg 73 may be attached to the bracket so as to be vertically pivotable, and a fastening screw or the like for fixing the horizontal leg 73 to the bracket side in an arbitrary inclined posture may be arranged.

In this example, the two horizontal legs have a structure capable of turning. Instead of this, for example, only one leg can be turned, and the other leg simply protrudes downward from the lower end of the screen panel.
The support mechanism may have a three-point support structure.

Also in this example, if a polarizing plate is attached to the surface of the screen panel, the same effect as described in Example 1 can be obtained.

(Embodiment 3) FIG. 9 shows still another example of the screen panel support mechanism. The support mechanism 92 shown in this figure is of a type in which the screen panel 91 is suspended. That is, the support mechanism 92 includes the support rod 93.
And a clamp mechanism 94 attached to the lower end and a panel engaging portion 95 formed on the upper end of the support rod. The clamp mechanism 94 is a U-shaped bracket 941.
And a fastening screw 942 that approaches and separates from the one side wall 941a, and can be clamped and fixed to the end of the top plate 201 of the desk 200 or the like. This clamp mechanism 9
4, the support rod 93 is fixed in a state of standing upright with respect to the top plate 201. The panel engaging portion 95 at the upper end of the support rod 93 includes a horizontal portion 951 and a vertical portion 952 bent upward at a right angle from the tip thereof.
As shown in FIG. 9B, on the screen panel 91 side, an upper frame 911 thereof has a U-shape with a lower opening. Therefore, if the screen panel 91 is attached so that the vertical portion 952 of the panel engaging portion at the upper end of the upstanding support rod 93 fits into the groove of the screen panel upper frame 911, the screen panel is attached to the support rod 93. 91 can be suspended and supported.

Of course, the number of support rods 93 may be two or more instead of one. Alternatively, a plate-shaped member may be used instead of the rod-shaped member to widen the width of the portion where the screen panel 91 is suspended.

Furthermore, if an adjusting mechanism capable of adjusting the interval between the lower end portion of the suspended screen panel 91 and the lower portion of the support rod 92 is attached, the screen panel 91 can be slightly moved from the vertical state. It can be adjusted to a leaning posture.

In this example, the upper frame of the screen panel is used to suspend the screen panel. Alternatively, the screen panel may be suspended from the support bar by using a ring, a string, or the like.

As described above, in the screen panel supporting mechanism of this embodiment, the screen panel can be installed on the desk without installing a stand such as a tripod on the tabletop of the desk. Therefore, it can be easily installed on such a desk or table without taking up an installation place.

Also in this example, if the structure in which the polarizing plate is attached to the surface of the screen panel is adopted, the same effect as described in Example 1 can be obtained.

[0042]

As described above, in the portable screen of the present invention, the four peripheral edges of the panel body plate are surrounded by a frame, and a plurality of reinforcing members are vertically arranged between the upper and lower frames. Therefore, the panel rigidity is sufficient to withstand carrying. At the same time, since the legs constituting the support mechanism are attached to such a reinforcing member or the lower frame portion to which it is connected, even if a force acts on such an attaching portion, These parts will not be deformed or damaged. Therefore, a high-strength screen suitable for carrying can be realized.

Further, in the portable screen of the present invention, since the legs constituting the support mechanism can be swung, the portable screen can be kept out of the way when being carried, and the portability can be improved. You can

Further, in the portable screen of the present invention, since the support mechanism is attached to the end of the top plate of the desk or the like and the screen panel is hung from the upper end thereof, it is possible to place it on the desk or the like. You can easily install the screen without removing the screen.

Further, in the portable screen of the present invention, as a support mechanism thereof, the screen panel posture is adjustable so that the screen panel is slightly tilted forward from the posture standing vertically to the installation surface. Equipped with an adjustment mechanism. Therefore, even when the projection light enters slightly upward, not perpendicularly to the screen reflection surface, as in the projection display device, it is possible to obtain an image in which there is no difference in brightness between the upper and lower sides of the screen.

In addition to this, the portable screen of the present invention employs a construction in which a polarizing plate is attached to the surface of the screen panel, so that half of the outside light can be blocked even in a bright room. There is an advantage that an image with wide color reproducibility and high contrast can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing a screen according to a first embodiment of the present invention, in which (a) is a front view thereof, (b) is a side view thereof, and (c).
Is a rear view thereof.

FIG. 2 is a view showing a stay of the screen of FIG . 1 taken out.
Where (a) is its top view, (b) is its front view, and (c) is its top view.
FIG.

3A and 3B are views showing a support arm forming legs for supporting the screen of FIG. 1, taken out, in which FIG. 3A is a front view thereof, and FIG. 3B is a side view thereof.

4A and 4B are views showing a horizontal leg that constitutes a leg for supporting the screen of FIG. 1, taken out, in which FIG. 4A is a side view thereof, and FIG. 4B is a plan view thereof.

5 is an explanatory view for explaining attachment of legs for supporting the screen of FIG. 1. FIG.

6 is an explanatory diagram for explaining a screen panel posture adjusting function in the screen support mechanism of FIG. 1. FIG.

7A and 7B are views showing a screen according to a second embodiment of the present invention, in which FIG. 7A is a perspective view showing an installed state thereof, and FIG. 7B is a perspective view showing a state in which a turning leg is housed.

8 (a) is a rear view of the screen of FIG.
(B) is a partially enlarged view showing an enlarged portion of the turning leg.

9A and 9B are views showing a support mechanism of a screen according to a third embodiment of the present invention, FIG. 9A is a schematic side view thereof, and FIG. 9B is a partial configuration view showing a part thereof.

FIG. 10 is a configuration diagram showing a conventional screen.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 21/56-21/64

Claims (7)

(57) [Claims] 1. A screen for displaying a magnified projection image, comprising a rectangular screen panel and a support mechanism for supporting the screen panel, wherein the screen panel is a panel body plate and the panel body. At least two, which are bridged in a direction substantially orthogonal to the rectangular frames arranged on the four peripheral edges of the plate and between the upper frame and the lower frame of the rectangular frame on the back surface side of the panel body plate.
A first reinforcing member and a second reinforcing member, and the supporting mechanism includes at least the first or second reinforcing member.
A support member having one end attached to the member, and the support member
A leg member attached to the multi-end of the leg member, and the leg member extends in the length direction of the leg member near the center.
A long hole is formed, and the leg member has a screw penetrating the long hole,
It is fixed to the rectangular frame by screwing it onto the lower frame.
Portable screen, characterized in that that. 2. The portable screen according to claim 1, wherein a polarizing plate is attached on the reflecting surface of the screen panel. 3. A screen for displaying a magnified projection image has a rectangular screen panel and a support mechanism for supporting the screen panel in an upright state, and the support mechanism has at least one swivel. Expression leg and the
Bra mounted on the back side of the clean panel so that it can swing freely
Comprises a socket, legs of the swivel is fixed to the bracket, the leg and the bracket of the swivel includes a storage state extending along the screen panel, said screen panel
Portable screen, characterized in that between the screen panel support state extending orthogonal directions is pivotable against Le. 4. The method according to claim 3, In the bracket, the swivel leg is in a stored state.
On the surface facing the screen panel,
Equipped with Engages with Velcro provided on the bracket
Velcro tape is provided on the back side of the screen panel.
A portable screen characterized by being 5. The method according to claim 3 or 4, The support mechanism includes the swivel leg and the screen.
Characterized by having auxiliary legs for supporting the panel at three points
Portable screen. 6. The screen panel posture adjustment according to claim 3 , wherein the support mechanism is capable of adjusting the screen panel so that the screen panel is in a posture in which the screen panel is vertically erected with respect to an installation surface and slightly inclined forward. A portable screen having a mechanism. 7. The portable screen according to claim 3 , wherein a polarizing plate is attached on the reflective surface of the screen panel.