KR102471470B1 - Method for manufacturing a screen having a homogeneous surface and a screen manufactured through the method - Google Patents

Abstract

The present invention provides a screen, which comprises a bead, a base sheet on which the bead is applied, and a binder having a resin adhesive as a component and allowing the bead to be tightly fixed on the base sheet. The bead may be discharged as fine particles of a uniform size from the top of the base sheet and applied in a certain amount on the base sheet.

Description

Method for manufacturing a screen having an even surface and a screen manufactured through the method

The present invention relates to a screen for projection, and more particularly, to a method for manufacturing a screen having an even surface with improved sharpness by uniformly applying beads to the surface, and a screen manufactured thereby.

An image projector system, such as a conventional projector television or video projector, is an image display system in which a projector generates an image and reflects the image on a mirror to enlarge and project it on a screen. Due to its advantages, the demand for it is increasing day by day.

This imaging system has a front reflection screen called the front type and a rear projection screen called the rear type according to the method of enlarging and projecting the image on the screen. Accordingly, light is projected forward to form an image on the surface of the screen and perceived by an observer positioned in front of the screen.

In general, a front projector screen is a display panel that implements an image screen using the optical technology of a beam projector, and is made of white or gray resin or paper. can recognize this.

In manufacturing a screen for receiving an image projected from a projector, aluminum powder is distributed and coated on the surface of the screen to increase brightness to induce light diffusion and light reflection on the surface, or a fine particle diffusion agent acting as a light diffusion agent is used. A light diffusing layer made by dispersing in a transparent resin layer may be laminated on a light reflecting layer for use.

In addition, since then, in order to solve the above-mentioned disadvantages and problems of the conventional screen, the development of a projection screen using a retroreflective film on which glass beads are deposited has been promoted, but this also failed to produce a high-quality product due to insufficiency of technology. Accordingly, a projection screen in which irregularities are formed on the surface of the light diffusion layer without using a retroreflective film has been proposed (International Application No.: PCT/JP 92/00715). This is to fix glass fibers to the surface of the light absorbing layer, which is a dark-colored plastic sheet, fix a base sheet of white opaque plastic thereon, and form a light diffusion layer of translucent and flexible plastic thereon. Concavo-convex surfaces are formed on the surface of the diffusion layer to imitate the action of glass beads of conventional projection screens.

On the other hand, the last projection screen proposed to solve the disadvantages of the projection screen having poor durability of glass beads and a metal reflective layer is also not very good in diffusivity and reflectance of light compared to the unit cost of manufacturing, and has a clear picture quality from the side. Problems such as not being able to watch and the video being somewhat dark were found. Considering this, it is thought that it is possible to reach the conclusion that it is most desirable to manufacture a projection screen that satisfies economic feasibility and functionality using a retroreflective film. There is a demand for a method for manufacturing a screen with significantly improved glass bead detachment and uniform distribution of glass beads on the surface and improved clarity, and a screen using the same.

The present invention has been made to solve the above-described problems of the prior art, and only beads of the same size are applied to the base sheet by applying a binder to the surface of the base sheet and adjusting the size of the beads discharged from the chamber in which the beads are accommodated. It has the purpose of providing a screen with improved sharpness due to the adhesiveness and beads to which the beads are attached to the screen.

According to the present invention for achieving the above object, a bead, a base sheet to which the bead is applied, and a resin adhesive as components, and a binder for tightly fixing the bead on the base sheet, wherein the bead It is discharged as fine particles of equal size from the top of the base sheet, and a certain amount may be applied on the base sheet.

The binder may be a resin adhesive in which a crosslinking agent of a polyisocyanate compound is dissolved in an organic solvent and mixed with a transparent polyurethane resin.

In addition, the binder may be applied to the base sheet to a thickness of 0.1 mm to 0.04 mm.

And it may include a chamber provided on top of the base sheet, accommodating the beads therein, and having a plurality of holes formed therein to adjust the size of the beads discharged to the base sheet.

In addition, the chamber has a receiving space in which the bead is accommodated, a first basket having a plurality of first holes formed therein, and a shape surrounding the first basket, and a lower portion corresponding to the first hole A second basket having a plurality of second holes may be included, and the beads may pass through both the first hole and the second hole and be discharged to the base sheet.

Also, any one of the first basket and the second basket may be formed to be movable, so that the first hole and the second hole may be displaced from each other.

In addition, the first basket may be coupled with a hydraulic cylinder to enable position movement inside the second basket.

The method may include disposing a base sheet, applying a binder to the base sheet, adjusting a size of a bead discharged to the base sheet, and attaching the bead to the base sheet.

In addition, the step of adjusting the size may further include preparing a chamber in which the bead is accommodated, adjusting the size of a hole in the lower portion of the chamber, and discharging the bead through the hole by shaking the chamber. have.

And drying the beads sprinkled on the base sheet so that they are adhered by the binder may be further included.

The method may further include moving the base sheet to remove beads not adhered to the binder from the base sheet.

According to the present invention, there is an advantage in that beads of a uniform size can be applied to the surface of the screen, and as a result, light reflected from the screen is constant, so that clear images can be viewed.

1 is a view showing a method for manufacturing a screen having an even surface according to an embodiment of the present invention and an overall appearance of a screen manufactured through the method;
2 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a screen in which beads are evenly applied in a portion A of the screen manufactured through the method;
3 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a screen having uneven beads in a portion A of the screen manufactured through the method;
4 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a screen including a base sheet, a binder, and beads in the screen manufactured through the method;
5 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a chamber in the screen manufactured through the method;
6 is a view for explaining a method of manufacturing a screen having an even surface according to an embodiment of the present invention and a state in which a chamber moves laterally and beads in an internal space are discharged without congestion in the screen manufactured through the method ;
7 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a state in which a first basket is moved and coupled hydraulically in the screen manufactured through the method;
8 is a view for explaining a method for manufacturing a screen having an even surface according to a second embodiment of the present invention and a state in which a first basket is moved and coupled in a screw manner in the screen manufactured through the method;
9 is a method for manufacturing a screen having an even surface according to an embodiment of the present invention, and in the screen manufactured through the method, the position of the first basket and the second basket is moved and discharged through the first hole and the second hole. A drawing for explaining adjusting the amount of beads to be;
10 is a method for manufacturing a screen having an even surface according to a third embodiment of the present invention, and in the screen manufactured through the method, a plurality of baskets are formed in a stacked form in a chamber so that the size of beads moving downward is gradually reduced. A drawing for explaining how to form a hole;
11 is a flow chart illustrating a method of manufacturing a screen having an even surface and a method of manufacturing a screen manufactured through the method according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numeral are used for the same configuration, and additional description thereof will be omitted.

1 is a view showing a method for manufacturing a screen having an even surface according to an embodiment of the present invention and the overall appearance of a screen manufactured through the method, and FIG. 2 is a screen having an even surface according to an embodiment of the present invention. It is a view for explaining a method of manufacturing and a screen to which beads are evenly applied in part A of the screen manufactured through the method, and FIG. 3 is a method for manufacturing a screen having an even surface according to an embodiment of the present invention and this 4 is a view for explaining a screen in which beads are not uniform in part A of the screen manufactured through, and FIG. 4 is a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a base sheet in the screen manufactured through the method And, it is a drawing for explaining a screen including a binder and a bead.

As shown in FIG. 1, the method for manufacturing an even screen according to the present invention and the screen manufactured through the method have beads evenly applied to the surface, so that the angle of reflection of the incident light is formed at a constant rate, so that clear picture quality can be realized. have a purpose to

A shown in FIG. 1 is an area for checking whether the bead 300 is homogeneous in some of the letters displayed on the screen 10, and will be described through FIGS. 2 and 3.

2 and 3 are extreme views of the character C being displayed on the screen.

FIG. 2 shows the application of beads 300 on the base sheet 100, and FIG. 3 shows the application of beads 300 having different sizes on the base sheet 100. to be.

When comparing FIGS. 2 and 3 , when the beads 300 are formed in different sizes, the sharpness of the text C or image quality displayed through the screen 10 may differ.

Therefore, a clearer picture quality can be seen on the screen 10 to which the uniform beads 300 are applied.

As shown in FIG. 2, since beads 300 of equal size are applied, a certain amount of beads 300 are applied at regular intervals on the base sheet 100, so that the letter C, which is expressed as have.

However, when the beads 300 of different sizes are applied as shown in FIG. 3, the letter C may not be displayed uniformly, and thus the sharpness may decrease.

Components of the present invention for constituting a screen to which such equally sized beads 300 are applied include a bead 300, a base sheet 100, and a binder 200, and the beads 300 are the base From the top of the sheet 100, uniformly sized particulates may be discharged and a certain amount may be applied on the base sheet.

Here, the bead 300 is a micro-sized sphere or elliptical cube, and the diameter of the bead 300 may be formed to be 0.01 mm to 0.1 mm.

In addition, the binder 200 has a resin adhesive as a component and allows the bead 300 to be tightly fixed on the base sheet 100, and can be applied to the base sheet 100 at a thickness of 0.1 mm to 0.4 mm. .

The binder 200 may be a resin adhesive in which a crosslinking agent of a polyisocyanate compound is dissolved in an organic solvent and mixed with a transparent polyurethane resin.

At this time, heat should be applied to the base sheet 100 to maintain a predetermined temperature, and the bead 300 may be applied in a heated state.

The method of applying the binder 200 does not depend on a spray method, a roll method, or a printing method, such as spraying or spraying, and may be repeatedly performed several times rather than applying at once.

The predetermined heating temperature as described above may be 90 ° C to 110 ° C, and if the heating temperature is 80 ° C or less, the viscosity is low, and the beads 300 may not be impregnated to a sufficient depth, resulting in loss of adhesive strength.

Conversely, when the temperature is higher than 180° C., the binder 200 is almost liquefied, and the degree of impregnation of the beads 300 becomes severe, so that the beads 300 are held under the binder 200, so that the reflective function cannot be exhibited.

In addition, it is preferable that the thickness of the binder 200 is determined within a thickness range of 0.1 mm to 0.4 mm as described above.

If the binder 200 is applied to a thickness of 0.1 mm or less, considering that the diameter of the bead 300 is 0.01 mm to 0.1 mm, the bead 300 cannot be immersed to a sufficient depth, and the adhesive leather deteriorates, and even if it is bonded, the adhesive layer is thin. A significant difference occurs in the height of each bead 300 fixed to the base sheet 100, and a problem in that the surface of the base sheet 100 becomes uneven may occur.

After spraying and heating the beads 300 on the binder 200, the binder 200 may be dried at a predetermined temperature by using a hot air machine. In order to strengthen the fixing force of the bead 300 described above and increase the degree of curvature of the surface, it would be preferable to heat at 100 ° C. for 30 minutes or more.

After drying, it can be aged for one week or more at a temperature of 40 ° C.

Even if it is dried using hot air for 30 minutes or more at a temperature of 100 ° C, aging time is required to completely dry down to the adhesive layer.

Meanwhile, a separate chamber 1000 may be provided so that the beads 300 are evenly applied on the base sheet 100 .

The chamber 1000 will be described with reference to FIGS. 5 to 10 .

5 is a view for explaining a method for manufacturing a screen having an even surface according to an embodiment of the present invention and a chamber in a screen manufactured through the method, and FIG. 6 is a view for explaining a screen having an even surface according to an embodiment of the present invention A view for explaining a method of manufacturing a screen and a state in which a chamber moves laterally in a screen manufactured through the method and beads in an internal space are discharged without congestion, and FIG. 7 is a surface according to an embodiment of the present invention It is a view for explaining a method of manufacturing an even screen and how the first basket is moved and hydraulically coupled in the screen manufactured through this, and FIG. 8 is a screen with an even surface according to a second embodiment of the present invention It is a view for explaining a method of manufacturing and a state in which the first basket is moved in a screen manufactured through this and coupled by a screw method, and FIG. 9 is a method for manufacturing a screen having an even surface according to an embodiment of the present invention. It is a view for explaining the method and the position of the first basket with the second basket in the screen manufactured through this movement and adjusting the amount of beads discharged through the first hole and the second hole, FIG. 10 is the present invention. A method for manufacturing a screen having an even surface according to the third embodiment of the method, and in the screen manufactured through the method, a plurality of baskets are formed in a stacked form in a chamber to form holes so that the size of beads moving downward is gradually reduced. It is a drawing for explaining.

The chamber 1000 may be disposed above the base sheet 100, accommodate the bead 300 in the inner space 1220, and have a plurality of holes 1240 and 1440 formed on its lower surface.

When the base sheet 100 is moved in one direction at the bottom of the chamber 1000, a certain amount of beads 300 may be discharged according to the moving time.

Accordingly, an equal amount of beads 300 may be applied to the base sheet 100 .

Subsequently, the chamber 1000 may be formed to be shaken by an external force.

The chamber 1000 may be vibrated at a preset cycle to facilitate discharge of the beads 300 accommodated in the inner spaces 1220 and 1420 through the holes 1240 and 1440 .

This means that either a cylinder or a magnet is mounted on the chamber 1000 so that the chamber 1000 can move repeatedly in a section. If the chamber 1000 can move repeatedly, the configuration used can be freely selected by the user. It is possible, and the scope of rights is not limited by this.

Specifically, the chamber 1000 facilitates the discharge of the beads 300 accommodated therein through the holes 1240 and 1440 by repeatedly and quickly moving the section, and the beads 300 irregularly accommodated in the inner spaces 1220 and 1420. ) may be formed to be easily discharged to the base sheet 100 through the holes 1240 and 1440.

Here, the chamber 1000 has a first basket 1200 in which an accommodation space 1220 is formed and a plurality of first holes 1240 are formed in the lower portion and a shape surrounding the first basket 1200, and has a lower portion. It includes a second basket 1400 in which a second hole 1440 corresponding to the first hole 1240 is formed, and the bead 300 passes through both the first hole 1240 and the second hole 1440 to form a base. It can be discharged to the sheet 100.

Here, the first hole 1240 and the second hole 1440 are formed to correspond to the shape of the bead 300 and may have a diameter of 0.02 mm to 3 mm.

This has the purpose of controlling the amount of beads 300 discharged through the first hole 1240 and the second hole 1440 as well as allowing only beads 300 of equal size to be discharged.

As shown in FIG. 5, the chamber 1000 has a first basket 1200 and a side surface and a second basket 1400 at a predetermined interval, and has a first hole 1240 and a second hole ( 1440) are formed to be in communication with each other in the same size, and it can be confirmed that the bead 300 is loaded inside the receiving space 122.

As shown in FIG. 6, the bead 300 continuously passing through the first hole 1240 and the second hole 1440 is formed so that the base sheet 100 also falls due to the repeated shaking of the chamber 1000. can

On the other hand, at least one of the first basket 1200 and the second basket 1400 may be provided to be capable of positional movement at a predetermined interval toward the side.

In FIG. 7 , it can be seen that the first basket 1200 is formed to be movable in a lateral direction on the second basket 1400 .

As the position of the first basket 1200 is moved to the side, the position of the first hole 1240 and the second hole 1440 may be shifted from each other, and the communicating passage may be narrowed.

Therefore, only the beads 300 corresponding to the size of the passage formed when the first hole 1240 and the second hole 1440 are misaligned pass through the first hole 1240 and the second hole 1440 to form the base sheet 100 ) can be released.

Specific embodiments will be described with reference to FIGS. 8 and 9 .

FIG. 8 is a view of the hydraulic cylinder 3000 mounted on the side of the first basket 1200 so that the position on the second basket 1400 is moved in the lateral direction.

As shown, while the position of the first basket 1200 is moved, the position where the first hole 1240 and the second hole 1440 are shifted can be adjusted, and it is possible to move at a predetermined interval according to the user's control rather than a fixed interval. Thus, it is possible to ensure that only beads having a desired size are discharged.

In addition, the chamber 1000 is formed to vibrate by repeating the section, so that the bead 300 on the accommodation space 122 can pass through the narrowed passage without any problem.

8 shows that the hydraulic cylinders 3000 are formed on both sides of the first basket 1200, but this is only a part of the embodiment, and the hydraulic cylinders 3000 may be formed only on either side.

Meanwhile, according to the second embodiment of the present invention, the screw bar 4000 may be formed on the side of the first basket 1200.

The screw bar 4000 is formed long and has threads formed along the circumference.

Accordingly, as the screw bar 4000 rotates, the position of the first basket 1200 in the lateral direction can be precisely adjusted.

Also, the screw bar 4000 may have a handle formed at an end protruding outward from the second basket 1400 so that a user can rotate the screw bar 4000 from the outside.

However, the screw bar 4000 may be externally connected to a separate motor so that the screw bar 4000 is rotated by the operation of the motor.

In this embodiment, the screw bar 4000 is shown as being formed on either side of the first basket 1200, but may be formed on both sides, and the scope of rights is limited according to the number of screw bars 4000 It is not.

As the position of the first basket 1200 is moved in this way, if the size of the holes 1240 and 1440 can be adjusted as in the first case, only the beads 300 of a certain size are discharged through the holes 1240 and 1440 to form a base sheet ( 100), the beads 300 may be applied homogeneously.

Meanwhile, a plurality of baskets may be formed in the chamber 1000 in the vertical direction.

As shown in FIG. 10, the holes 1240 and 1440 are in communication with each other at the upper part and the first basket 1200 is not moved, and the first basket 1200 is moved at the lower part so that the first hole ( 1240) and the second hole 1440 are displaced from each other, so that when the passage narrows, the beads 300 are relatively small and only those corresponding to the passage pass through.

Accordingly, a plurality of baskets 1200 and 1400 are formed in a vertical direction, and the size of the beads 300 passing through the holes 1240 and 1440 can be adjusted to be smaller as they descend from the top to the bottom.

As shown, the large bead 300a, the middle bead 300b, and the small bead 300c are in complete communication with the first hole 1240 and the second hole 1440 at the top, so that the middle bead 300b and the small bead 300b passing through them Bead 300c may be passed through.

In addition, when the first hole 1240 and the second hole 1440 are displaced from each other and the passage is narrowed, only small beads 300c remain in the passage through which the beads 300 pass through to determine the size of the beads 300. You will be able to do it.

The screen 10 manufactured through the configuration as described above includes the step of disposing the base sheet 100 (S1), the step of applying the binder 200 to the base sheet 100 (S2), and the base sheet 100. A screen may be manufactured through the step of adjusting the size of the discharged beads 300 (S3) and the step of attaching the beads 300 to the base sheet 100 (S4).

11 is a flow chart illustrating a method of manufacturing a screen having an even surface and a method of manufacturing a screen manufactured through the method according to an embodiment of the present invention.

Here, the step of adjusting the size is a process of preparing the chamber 1000 in which the bead 300 is accommodated, a process of adjusting the size of the holes 1240 and 1440 at the bottom of the chamber 1000, and a process of shaking the chamber 1000 to make the hole 1240 , 1440) may further include a process of discharging the beads 300.

A step of drying so that the beads 300 sprayed on the base sheet 100 are adhered by the binder 200 may be further included, and the beads 300 that are not adhered to the binder 200 may be removed by moving the base sheet 100. A step of removing from the base sheet 100 may be further included.

As described above, the preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope in addition to the above-described embodiments is a matter of ordinary knowledge in the art. It is self-evident to them. Therefore, the embodiments described above are to be regarded as illustrative rather than restrictive, and thus the present invention is not limited to the above description, but may vary within the scope of the appended claims and their equivalents.

10: screen
20: Projector
100: base sheet
200: binder
300: bead
1000: chamber
1200: first basket
1220: receiving space
1240: 1st hole
1400: second basket
1420: inner space
1440: 2nd hall
3000: Cylinder
4000: screw bar

Claims (12)

bead;
a base sheet on which the beads are applied; and
A binder containing a resin adhesive as a component and tightly fixing the bead on the base sheet,
The beads are discharged as fine particles of equal size from the top of the base sheet and applied in a certain amount on the base sheet,
Further comprising a chamber provided on top of the base sheet, accommodating the beads therein, and having a plurality of holes formed therein to adjust the size of the beads discharged to the base sheet,
The chamber has a receiving space in which the bead is accommodated, a first basket having a plurality of first holes formed therein, and a shape surrounding the first basket, and a first basket corresponding to the first hole at the lower portion. A second basket having a plurality of two holes, characterized in that the beads pass through both the first hole and the second hole and are discharged to the base sheet.
screen. According to claim 1,
The binder,
Characterized in that it is a resin adhesive in which a crosslinking agent of a polyisocyanate compound is dissolved in an organic solvent and mixed with a transparent polyurethane resin resin,
screen. According to claim 1,
Characterized in that the binder is applied to the base sheet to a thickness of 0.1 mm to 0.04 mm,
screen. delete delete According to claim 1,
Characterized in that either the first basket or the second basket is formed to be movable, and the first hole and the second hole are displaced.
screen. According to claim 6,
Characterized in that the first basket is coupled to a hydraulic cylinder to enable position movement inside the second basket,
screen. delete placing a base sheet;
applying a binder to the base sheet;
adjusting the size of beads discharged to the base sheet; and
attaching the bead to the base sheet;
including,
The step of adjusting the size is,
preparing a chamber in which the beads are accommodated;
adjusting the size of the hole in the lower part of the chamber; and
Characterized in that it further comprises a process of shaking the chamber and discharging the bead through the hole,
A method of manufacturing a screen with an even surface. delete According to claim 9,
Characterized in that it further comprises the step of drying so that the beads sprinkled on the base sheet are adhered by the binder,
A method of manufacturing a screen with an even surface. According to claim 9,
Characterized in that it further comprises the step of moving the base sheet to remove beads that are not adhered to the binder from the base sheet.
A method of manufacturing a screen with an even surface.

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