KR102410717B1 - Plate capable of writing and screen fucntions - Google Patents

Abstract

In the writing and screen combination plate comprising an anti-reflection layer, a screen layer and a support layer, the anti-reflection layer includes a transparent film, a water-repellent coating layer formed on the front surface of the transparent film, and a bead scattering layer formed on the surface of the water-repellent coating layer, wherein the screen layer includes It includes a screen film and a polymer liquid crystal dispersion layer formed on the front surface of the screen film, and a transparent substrate for resisting pen pressure applied to the front surface of the anti-reflective layer may be interposed between the anti-reflective layer and the screen layer.

Description

Plate for writing and screen use {PLATE CAPABLE OF WRITING AND SCREEN FUCNTIONS}

The present invention relates to a plate, screen or blackboard capable of providing writing and screen functions.

As the beam projector is used in meetings and lectures, a screen or blackboard that can provide writing and screen functions at the same time is being developed.

Korean Patent Registration No. 10-1237314 relates to a "multifunctional sheet for screen and writing", wherein the multifunctional sheet includes a matte coating layer, a transparent PET layer, a color coating layer, a first adhesive layer, a foam layer, a second adhesive layer, and a release film layer. etc., and the matte coating layer is made of methacrylate resin (PMMA), polycarbonate (PC), polypropylene foamed resin (PP) or acrylonitrile butadiene styrene (ABS)-based synthetic resin. By sequentially stacking a cured coating layer and a wax composition coating layer, anti-reflection function and strong surface treatment are provided.

Korean Patent Application Laid-Open No. 10-2015-0116327 relates to "a non-reflecting screen combined with a blackboard and a method for manufacturing the same", wherein the screen has an anti-reflection concave-convex surface on its front surface, and a void layer, a screen layer, and a support layer are sequentially formed on the rear surface of the screen. Accordingly, a screen having an anti-reflection function and flexibility is provided.

However, in the conventional simple stacked structure, a double image is formed on the screen and a disadvantage that a comfortable and clear screen cannot be provided may occur.

In addition, even in forming the anti-reflective coating layer, there is a problem that the writing feeling and erasability of the board marker may be deteriorated because irregularities are formed on the surface.

The present invention provides a special writing and screen combination plate to provide a comfortable and clear screen without forming a double image even when using a screen despite forming a multi-layered structure for writing and screen functions.

The present invention provides a writing feeling of a general whiteboard even when an anti-reflection layer is formed on the outermost surface to prevent glare on the surface, and provides a writing and screen combination plate having excellent erasability.

According to an exemplary embodiment of the present invention, in the writing and screen combination plate including an anti-reflective layer that can be converted to a beam projector screen, a screen layer and a support layer, the anti-reflective layer is a transparent film, water repellent formed on the front surface of the transparent film A bead scattering layer formed on the surface of the coating layer and the water repellent coating layer, wherein the screen layer includes a screen film and a polymer liquid crystal dispersion layer formed on the front surface of the screen film, and between the anti-reflective layer and the screen layer, applied to the front surface of the anti-reflective layer A transparent substrate for resisting the pen pressure may be interposed.

The first adhesive layer may be formed on the rear surface of the anti-reflective layer to be detachably attached to the transparent substrate, and if the surface of the anti-reflective layer is damaged or irreparably contaminated, it is also possible to replace the anti-reflective layer. To this end, the adhesive force of the first adhesive layer may be in the range of 10 to 20 g/inch.

A second adhesive layer may also be formed on the rear surface of the screen layer, and the adhesive strength of the second adhesive layer may be preferably formed in a range of about 30 to 40 g/inch, which is higher than that of the first adhesive layer.

A magnetic layer such as an iron plate may be interposed between the screen layer and the support layer to enable attachment of teaching aids using magnets.

The bead scattering layer of the anti-reflective layer may be formed using glass beads, and in this case, the contact angle of the anti-reflective layer on which the glass beads are formed may preferably be about 0 to 5 degrees.

The water-repellent coating layer may include a primer coating layer having a thickness of about 5 to 10 μm.

The screen layer may further include a silver layer interposed between the screen film and the polymer liquid crystal dispersion layer, and a necessary color may be further added to the silver layer if necessary.

The polymer liquid crystal dispersion layer of the screen layer may be formed to a thickness of about 5 to 15 μm, and the polymer used for the polymer liquid crystal dispersion layer of the screen layer may use a silicone acrylate series.

The writing and screen combination plate of the present invention can provide a comfortable and clear screen without forming a double image even when the screen is used, and provides excellent writing feeling and good erasability.

In addition, by forming a water-repellent coating layer and a glass bead layer, it is possible to diffusely reflect and diffuse a part of ambient light and sunlight to effectively prevent attenuation of projection light due to ambient light.

In particular, in the present invention, the projection light having a normal projection distance and a short throw distance is primarily scattered by the polymer liquid crystal dispersion layer, and the scattered light is also backscattered in the liquid crystal dispersion layer so that it can be evenly distributed over the entire screen.

Accordingly, the writing and screen combination plate of the present invention provides a comfortable viewing environment for lecturers and viewers, and reduces light loss significantly to improve luminance compared to general screen boards and provide a brighter and clearer screen.

In addition, in the writing and screen combination plate of the present invention, the anti-reflection layer is designed so that the entire surface can be replaced in case of surface scratches or damage, so that the screen board can be used for a long time at a minimum cost.

By exposing the surface of the water-repellent coating layer between the glass beads, the ink is trapped between the beads on the water-repellent coating layer, improving the writing of the ink, and facilitating separation between the water-repellent coating layer and the ink to improve erasability. By forming a contact angle of about 0 to 5 degrees on the surface of the anti-reflection layer, the ink does not form and spreads well so that it can be written.

1 is a view for explaining a plate for writing and screen combination according to an embodiment of the present invention.
FIG. 2 is a view for explaining an anti-reflection layer, a transparent substrate, and a screen layer of FIG. 1 .
FIG. 3 is a view for explaining a scattering process in the screen layer of FIG. 1 .
4 is a view for explaining a plate for writing and screen combination according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, the same numbers in the present description refer to substantially the same elements, and may be described by citing the contents described in other drawings under these rules, and the contents determined to be obvious to those skilled in the art or repeated may be omitted.

FIG. 1 is a view for explaining a plate combining writing and screen according to an embodiment of the present invention, FIG. 2 is a view for explaining an anti-reflection layer, a transparent substrate, and a screen layer of FIG. 1 , and FIG. 3 is a diagram of FIG. It is a view for explaining a scattering process in the screen layer, and FIG. 4 is a view for explaining a plate combining writing and screen according to an embodiment of the present invention.

1 to 4 , the writing and screen combination plate 100 according to the present embodiment can be used for a blackboard, a screen, etc., and includes an anti-reflection layer 110 , a screen layer 120 and a support layer 130 . can do.

The anti-reflection layer 110 is located on the frontmost side of the plate 100, and writing may be possible using a macaboard pen, chalk pen, etc. on the outer surface, and the screen layer 120 on the rear surface of the anti-reflection layer 110 ) is located so that light from the beam projection can be focused.

According to this embodiment, the anti-reflection layer 110 is a transparent film 112 made of PET, etc., a water-repellent coating layer 116 formed on the front surface of the transparent film 112, and a bead scattering layer formed on the surface of the water-repellent coating layer 116 ( 114 , the screen layer 120 may include a screen film 122 and a polymer liquid crystal dispersion layer 124 formed on the front surface of the screen film 122 .

In addition, a transparent substrate 140 made of a material such as PC for resisting pen pressure applied from the front surface of the anti-reflective layer 110 may be interposed between the anti-reflective layer 110 and the screen layer 120 .

Accordingly, even when pen pressure is applied to the front surface of the anti-reflection layer 110 by a pen or the like, the surface of the screen layer 120 can be easily protected.

Referring to FIG. 2 , the first adhesive layer 118 may be formed on the rear surface of the anti-reflective layer 110 , and the transparent film 112 of the anti-reflective layer 110 via the first adhesive layer 118 is a transparent substrate. It may be detachably attached to 140 . If the surface of the anti-reflective layer 110 is damaged or irreparably contaminated, the life of the blackboard to which the plate 100 is applied may be further increased by replacing the anti-reflective layer 110 .

The adhesive force of the first adhesive layer 118 may be in the range of about 10 to 20 g/inch, and, as will be described later, a relatively small adhesive force compared to the adhesive force of the second adhesive layer 128 of the screen layer 120 . It is desirable to keep In this case, the adhesive force of the second adhesive layer may be preferably formed in a range of about 30 to 40 g/inch higher than that of the first adhesive layer.

A magnetic material layer 150 such as an iron plate may be interposed between the screen layer 120 and the support layer 130 to enable attachment of a teaching aid using a magnet. As the magnetic layer 150, an iron plate having a thickness of about 1 mm may be used, and an object such as a magnet may be easily attached and the weight of the entire plate may be reduced by using a thin material.

The bead scattering layer 114 of the anti-reflection layer 110 may be formed using glass beads, and the glass beads may be dispersed and distributed on the surface of the water repellent coating layer 116 . Glass beads can be mixed with a resin such as silicone that forms the water-repellent coating layer, and the glass beads 114 are evenly distributed on the surface of the water-repellent coating layer 116 while curing the water-repellent coating layer 116 using ultraviolet rays or heat. can

At this time, by exposing the surface of the water-repellent coating layer 116 between the glass beads 114 , the ink can be trapped between the glass beads 114 , and an anti-reflection layer with excellent eraseability of the board marker can be formed.

The surface contact angle of the anti-reflective layer 110 on which the glass beads are formed may be preferably about 0 to 5 degrees. The water-repellent coating layer 116 on which the bead scattering layer 114 is formed may be formed using a primer coating layer having a thickness of about 5 to 10 μm.

The screen layer may include a screen film 122 and a polymer liquid crystal dispersion layer 124 . The polymer liquid crystal dispersion layer 124 of the screen layer 120 may be formed to a thickness of about 5 to 15 μm, and the polymer used for the polymer liquid crystal dispersion layer 124 may use a silicone acrylate series.

A silver layer 126 using silver powder or the like may be further formed between the screen film 122 and the polymer liquid crystal dispersion layer 124 . In addition to simple silver, a necessary color may be added to the silver layer 126 as needed.

The screen layer 120 may provide a high-brightness screen function by using the silver layer 126. In addition, the screen film 122 may be provided with various materials such as a general brightness screen, a fabric screen fabric, and an ultra-short focus CLR fabric. have.

In this way, when the screen film 122 is formed of a fabric, etc., the pen pressure of the anti-reflective layer 110 may be directly applied to the polymer liquid crystal dispersion layer 124 , and the pen pressure from the anti-reflective layer 110 to the transparent substrate 140 . By blocking the screen layer 120 can be prevented from being directly damaged.

Referring to FIG. 3 , the polymer liquid crystal dispersion layer 124 of the screen layer 120 may be formed by coating and curing a coating solution in which molecular liquid crystal is dispersed in a wet coating method.

When the liquid in which the liquid crystal is dispersed in the polymer is cured, the liquid crystals can be evenly dispersed in the polymer network layer in the form of droplets. When light enters from the front surface, the light may be scattered or refracted depending on the intrinsic direction of the polymer liquid crystal droplet, and may be diffused overall through this process.

When the projection light is diffused as shown in FIG. 3 , the projection hot spot, which is a conventional problem, disappears, so that a user can provide a comfortable screen without glare. In addition, the light scattered from the polymer liquid crystal dispersion layer 124 is retroreflected by the densely dispersed liquid crystal droplets and enters the screen fabric again to provide a high-brightness screen as a result without loss of light.

In addition, due to the even scattering effect of the polymer liquid crystal dispersion layer 124 , light does not move in a specific direction but is scattered in all directions, so that the image on the plate 100 can be viewed from a fairly wide viewing angle.

As the polymer liquid crystal used for the polymer liquid crystal dispersion layer 124, a nematic-based liquid crystal may be used, and a polymer liquid crystal having an average size of about 0.8 to 1.2 μm in the size of liquid crystal droplets may be used, and the liquid crystal refractive index anisotropy is about It is also possible to suppress the generation of light scattered to the front by using a liquid crystal of 0.2 or less.

The support layer 130 may use a material such as wood or honeycomb as a finishing material, and may be expected to finish the rear surface of the plate 100 and support the magnetic layer 150 . It may be preferable that the material of the support layer 130 is hard and has no warpage, and various materials or structures may be used for this purpose.

Referring to FIG. 4 , a molding 160 and the like may be further added to the plate 100 to configure a blackboard or the like. The molding 160 may use various shapes and materials, and the blackboard together with the molding 160 may be provided as a separate support structure or may be attached to a wall surface.

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

100: plate 110: anti-reflective layer
120: screen layer 124: polymer liquid crystal dispersion layer
130: support layer 140: transparent substrate
150: magnetic layer

Claims (12)

In the writing and screen combined plate comprising an anti-reflective layer, a screen layer and a support layer,
The anti-reflection layer includes a transparent film, a water-repellent coating layer formed on the front surface of the transparent film, and a bead scattering layer formed on the surface of the water-repellent coating layer,
The screen layer includes a screen film, and a polymer liquid crystal dispersion layer formed on the front surface of the screen film,
A transparent substrate is interposed between the anti-reflective layer and the screen layer to resist pen pressure applied to the entire surface of the anti-reflective layer,
A first adhesive layer is formed on the rear surface of the anti-reflective layer and is detachably attached to the transparent substrate, and the first adhesive layer and the transparent substrate are attached without a gap,
The bead scattering layer of the anti-reflection layer is formed using glass beads, the glass beads are dispersed and distributed on the surface of the water-repellent coating layer, and the writing characterized in that it is exposed on the surface of the water-repellent coating layer between the glass beads; A plate for both screens. delete According to claim 1,
The first adhesive layer has an adhesive force in the range of 10 to 20 g/inch. 4. The method of claim 3,
A second adhesive layer is formed on the rear surface of the screen layer, and the adhesive force of the second adhesive layer is 30 to 40 g/inch, which is higher than that of the first adhesive layer. According to claim 1,
A writing and screen combination plate, characterized in that a magnetic layer is interposed between the screen layer and the support layer. delete According to claim 1,
The writing and screen combined plate, characterized in that the contact angle on the surface of the anti-reflective layer is 0 ~ 5 degrees. According to claim 1,
The water-repellent coating layer is a plate for writing and screen use, characterized in that it comprises a primer coating layer with a thickness of 5 to 10㎛. delete According to claim 1,
The screen layer further comprises a silver layer interposed between the screen film and the polymer liquid crystal dispersion layer. According to claim 1,
The writing and screen combination plate, characterized in that the polymer liquid crystal dispersion layer of the screen layer is formed to a thickness of 5 to 15㎛. According to claim 1,
The polymer used in the polymer liquid crystal dispersion layer of the screen layer is a writing board and screen combination plate, characterized in that it uses a silicone acrylate series.

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