KR101318231B1 - light reflection plate - Google Patents

Abstract

The present invention relates to a light reflection plate that can be used for various purposes, and more particularly, to a high quality light reflection plate that can improve the illuminance and brightness of light irradiated in a structure in which a reflection sheet is formed on an upper surface thereof, and can be manufactured inexpensively and thinly.
The main configuration of the present invention for achieving the object of the present invention, the reflective sheet 5 of the transparent or semi-transparent material, the light guide plate (1) formed on the lower portion of the reflective sheet, formed on the light guide plate (1) and the light is lower It characterized in that it comprises a reflective sheet 10 to prevent leakage to reflect the light to the upper portion, characterized in that to form a dot sheet (3) having a dot (2) on the reflective sheet (10) The dot 2 is characterized in that it comprises an adhesive, the dot 2 is characterized in that it comprises a pigment, the adhesive layer 6 made of an adhesive between the light guide plate 1 and the reflective sheet 5 It is characterized in that to form an integrally attached to the upper and lower surfaces of the reflective sheet (5) and the light guide plate (1) to selectively adjust the brightness of the reflected light by further forming a light control sheet (30). The reflection sheet 5 and the The upper and lower surfaces of the light plate 1 are selectively formed with colored dots 31 to adjust the brightness of the reflected light, and the bottom adhesive layer 8 is formed on the bottom surface of the light guide plate 1 or bead. It is characterized in that it comprises any one of forming a contact bead 33 consisting of, wherein the dot formed on the dot sheet 3 and the light control sheet 30 is optionally high density according to the density to form the dot The light guide plate is characterized in that it is formed by dividing into the collecting portion 11 and the low-density portion 12, the light guide plate is a lens-shaped light guide plate to form a concave groove 50 concave on the lower surface, the conical groove 50 of the light guide plate Below) further comprises a light source including an LED.

Description

Light reflection plate

The present invention relates to a light reflecting plate that can be used for various purposes, and particularly includes a high brightness reflecting sheet (either a reflecting sheet or a high degree of reflecting sheet, but preferably a high brightness reflecting sheet is used on the upper surface. Improves the illuminance and brightness of the irradiated light and its uniformity in the structure formed by using the terminology of the sheet), and in the case of non-irradiation, the high-brightness reflective sheet reflects external lights such as a vehicle at low cost, making it possible to make it thin and inexpensive. It is about high quality light reflector

[Document 1] Patent Application No. 10-1997-0701559

[Document 2] Patent Application No. 10-1998-30306

There are various types of light reflectors reflecting the irradiated light.

For example, a delineator that is installed on a road and reflects the lights of a vehicle traveling at night to guide the safe driving of the vehicle has a reflector formed under the cover.

Such a conventional reflector has a disadvantage in that its structure is complicated and its light reflection efficiency is not very good, its manufacturing cost is high, and its thickness and volume are also large.

In addition, the reflector has to be manufactured differently according to the manufacturing specifications according to the use purpose such as the delineator.

The present invention has been invented in view of the above points, and the reflector structure is simple and easy to manufacture, and the light reflecting efficiency, that is, the illuminance and brightness and its uniformity is excellent, the manufacturing cost is low, and the thickness and volume of the reflector is small. In addition, it is an object of the present invention to provide a light reflector excellent in general purpose that only needs to be cut to a certain size according to the intended use.

In addition, it is an object of the present invention to provide a light reflector that can reflect the color of the reflection plate itself without using a color means for producing a separate color reflected light to produce the color as needed.

The main configuration of the present invention for achieving the object of the present invention, the high brightness reflective sheet 5 of the transparent or translucent material, the light guide plate (1) formed on the lower portion of the reflective sheet, and formed under the light guide plate (1) It characterized in that it comprises a reflective sheet 10 to prevent leakage to the lower portion and reflecting the light to the upper portion, characterized in that the dot sheet 3 having a dot (2) formed on the reflective sheet (10) The dot (2) is characterized in that it comprises an adhesive, the dot (2) is characterized in that it comprises a pigment, the adhesive layer made of an adhesive between the light guide plate (1) and the reflective sheet (5) (6) is formed and attached integrally, and on the upper and lower surfaces of the reflective sheet (5) and the light guide plate (1), an additional light control sheet (30) is selectively formed to adjust the brightness of the reflected light. Characterized in that the reflection Color dots 31 are selectively formed on the upper and lower surfaces of the sheet 5 and the light guide plate 1 to adjust the brightness of the reflected light, and the bottom adhesive layer 8 is formed on the bottom surface of the light guide plate 1. Or forming an adhesive bead 33 made of beads, wherein the dots formed on the dot sheet 3 and the light control sheet 30 are selectively formed. Characterized in that it is formed by dividing the high-density portion 11 and the low-density portion 12 according to the density to be, wherein the light guide plate is characterized in that the lens-shaped light guide plate to form a concave groove 50 concave on the lower surface. Under the conical groove 50 of the characterized in that to form a light source further comprising an LED

Additional features other than the above will be further described below with reference to the accompanying drawings.

According to the present invention, the reflector structure is simple, the light reflecting efficiency, that is, the illuminance and brightness and its uniformity is very good, the manufacturing cost is low, the thickness and volume of the reflector is small, it is only used to cut to a certain size according to the intended use It is possible to provide a light reflector with excellent general purpose.

For example, it can be applied to all road safety products including delineators, and all reflector products that need light reflection.

For example, when the present invention is used as a delegate, it is possible to solve the inconvenience that an afterimage remains in the eyes due to the irradiation of light of a delineator such as a conventional point light source due to the overall uniform brightness.

In addition, in the case of using the lens type light guide plate according to an embodiment of the present invention, the brightness is further improved, thereby reducing the number of use of light sources such as LEDs.

In addition, the reflector itself can be produced in color as needed, it can provide a light reflector capable of emitting color reflected light without using a color means for emitting a separate color reflected light.

1 is an exemplary diagram for explaining an embodiment of the present invention.
2 is a view for explaining a dense state of dots 2 formed on the dot sheet 3 and the like.
3 is another embodiment of the present invention
4 is a view for explaining the cohesive bead 33 formed on the bottom of the light guide plate.
5 is another configuration example of the light guide plate used in the present invention;
6 is another embodiment of the present invention

1 shows an embodiment according to the present invention.

As shown in the figure, the present invention provides a dot sheet 3 having dots 2 formed on a bottom surface of a light guide plate 1 made of a resin material such as glass or acryl, and a reflective sheet 5 on the light guide plate 1. Install

The dot sheet 3 has a structure in which dots or colored dots are formed on the sheet surface, and dots are printed by a printing method. The use of colored dots eliminates the need for installation by adding a separate color light guide plate or a separate color effect means for emitting color, which makes the manufacturing process very simple and inexpensive.

The dot sheet 2 produces a pattern by printing a dot or a color dot using a gravure printing method, so the production speed is very fast, the manufacturing cost is low, and no additional processing is required for the light guide plate. The dot pattern is printed by adjusting the formation position and the spacing of the grooves formed on the surface of the printing roll during gravure printing.

When grooves are densely formed on the surface of the printing roll, the dots 2 are densely formed on the surface of the dot sheet 3. Therefore, since a desired pattern and density are based on the pattern formed on the printing roll surface which consists of copper plates, grooves may be processed and formed in a printing roll in a desired pattern.

The dot printing material accommodated in the groove of the printing roll is made of a material in which a diffusion agent (diffusion bead) and an adhesive are mixed, so that the dot 2 can be formed on the dot sheet 3 and the dot 2 can be stably formed.

The printing material may be a mixture of diffusion beads and pressure-sensitive adhesives, but in some cases, diffusion beads and pressure-sensitive adhesives may be used. In this case, after printing the diffusion beads, the pressure-sensitive adhesive layer is formed thereon by printing or the like. You may

Diffusion beads are acrylic beads and homopolymers of alkyl acrylate esters and / or alkyl methacrylate esters and these and (meth) acrylonitrile, (meth) acrylamide, methyl (meth) acrylate and / or N-methylol ( Beads made of copolymer resins such as meta) acrylamide can be used.

In order for the adhesive to adhere the dot sheet 3 to the light guide plate 1, a pressure-sensitive adhesive material, such as transparent or translucent, is used as a material added to give the adhesiveness.

Conventionally, since the light guide plate is processed to give a light diffusion effect, the light guide plate is difficult to process, requires a high processing cost, and takes a long time to manufacture. In addition, the conventional light guide plate has a disadvantage in that it takes a lot of time and processes in the machining process and post-treatment process because the cutting oil is used for the surface processing.

The dot sheet 3 used in the present invention has an effect of removing the moiré phenomenon and improving the illuminance and brightness by giving light diffusion effect by itself.

The light guide plate 1 to which the dot sheet 3 is attached is made of, for example, an acrylic material, and may have grooves having a shape such as a concave lens concave on the upper and lower surfaces.

On the other hand, the dot (2) can also be configured in color as described above, wherein the color pigment (dye) to be added to the dot material is an acrylic bead which is the above-mentioned diffusion bead material, alkyl acrylate ester and / or alkyl methacrylate A pigment is mixed with a bead made of a homopolymer of an ester and copolymer resins such as (meth) acrylonitrile, (meth) acrylamide, methyl (meth) acrylate and / or N-methylol (meth) acrylamide. do

Alternatively, it may be mixed with an adhesive material. Alternatively, the pressure-sensitive adhesive material, the diffusion bead material (diffusing agent), and the pigment (dye) may be mixed at a time. Pigments use dye inks or pigment inks. Pigments may use powdered pigments or may be used with solvents.

The solvent is mixed (diluted) with the pigment and then evaporated after dot formation. Preferably, organic solvents are used, for example, benzene, methyl ethyl ketone, toluene, methylene chloride, trichloroethylene, isobutyl ketone, xylene, ethyl alcohol, gasoline, etc. Use chemicals that have carbon (C) and hydrogen (H) in the chemical structure and have solvent properties.

In this way, when the color is given to the dot 2, it is possible to irradiate light having a color by itself, so that it is not necessary to use an LED that emits a color for a separate color, or use any other apparatus or colored panel.

Therefore, it is possible to manufacture the colored light reflector and the like at a very low cost. In addition, when the dot sheet 3 having the colored dot 2 according to the present invention is attached to the light guide plate and used together in a structure irradiating light by an LED or other light source, the color light guide plate can be easily manufactured at low cost.

In FIG. 1, the reflective sheet 5 transmits and reflects light.

The reflective sheet 5 uses commercially available products of LG, 3M company, for example. The reflective sheet 5 is made of, for example, a polyester material and is a white or colored transparent or translucent material. Reflective sheet reflects the external light and transmits the light downward, reflects from the reflective sheet 10 formed at the bottom, and emits uniform brightness and illuminance by the configuration of the light guide plate 1 and the like.

An adhesive layer 6 containing an adhesive may be formed between the reflective sheet 5 and the light guide plate 1 as needed to be integrally mounted.

In addition, the adhesion between the dot sheet 3 and the light guide plate 1 may include adhesion of the dot 2 material with an adhesive, but may also be formed by forming a separate bottom adhesive layer 8.

The bottom adhesive layer 8 may refract light to help ensure uniform brightness and illuminance. The bottom adhesive layer 8 may be configured in a printed form without forming a layer. That is, for example, the bottom surface of the light guide plate 1 may be printed by printing or dot material may be formed on the light guide plate 1 by printing. It can also be bonded in other forms.

For example, as shown in FIG. 4, bead-shaped or dot-shaped adhesive beads 33 may be formed to be bonded to, for example, the dot sheet 3. This adhesive bead 33 can also be printed on the light guide plate 1 by adjusting its density. In addition, the adhesive beads 33 may be formed in a pattern, or may be partially formed on the bottom surface of the light guide plate 1 by printing or the like. The adhesive bead 33 may also be made of a transparent or semi-transparent material containing a pigment, and thus may also function to control the amount of light transmitted. When pigment is included, it gives off color and light transmittance, so it can be used selectively or partially when brightness is needed as needed.

FIG. 2: shows the density of the dot 2 formed in the surface of the dot sheet 3 in plan view. As shown in the drawing, the dots formed of the dots 2 may be arranged in such a way that the dense dense portions 11 that are dense and the low dense portions 12 that are opposite to each other may be arranged as necessary.

The higher density portion 11, the greater the scattering of light, the higher the luminance. For example, when light is irradiated at the central portion of the dot sheet 3, when the dot 2 is formed at the central portion of the high density portion 11, the density of the dots 2 is densely formed, the luminance and illuminance may be reduced due to light diffusion and scattering. I can raise it. On the contrary, in the case of a portion directly exposed to light, even if such a dot 2 is formed at a low density, sufficient luminance can be exhibited. The density of such dots 2 can be appropriately arranged on the dot sheet 3 plane as needed.

In FIG. 1, a reflective sheet 10 made of a material such as PE or PC may be further formed on the bottom of the dot sheet 3.

Reflective sheet 10 is made of a material that is not transmitted through the illumination light. In other words, it is to prevent light from leaking to the bottom and to reflect it to the top to increase the illuminance of the light toward the upper surface. The dot sheet 3 and the reflective sheet 10 may be provided with only one option or both. Installation of the dot sheet 3 is more effective in increasing the illuminance and brightness of the light and the uniformity of the light.

In addition, as shown in FIG. 1, the light adjusting sheet 30 may be further provided at upper and lower positions of the reflective sheet 5 or at upper and lower positions of the light guide plate 1.

The light control sheet 30 is formed of a colored translucent material or transparent material. The light control sheet 30 is a sheet for adjusting the light transmission amount, the material is a transparent material or a translucent material, and the dot 31 is formed by printing a dot material in the form of beads on the sheet surface. The dot material is made of, for example, transparent or translucent or colored acrylic beads, and any other opaque or translucent material may be used.

It can also be produced, for example, by printing dots with colored pigments or with colored translucent materials. Then, the dot 31 has an effect of blocking the degree of light transmission to some extent, so that it is necessary when the light is to be darker or partially irradiated with less light as necessary.

For example, this dot 31 can also be formed of the high density part 11 and the low density part 12 as in the example of FIG.

Alternatively, instead of making and installing the light control sheet 30 separately, the dots 31 may be selectively or entirely printed on the reflective sheet 5 or the light guide plate 1 by screen printing or the like.

3 is another embodiment of the present invention.

In the present embodiment, the light guide plate 1 is formed of a lens type light guide plate 1.

As shown in FIG. 5, the lenticular light guide plate 1 is processed into a concave side working blade 138 of the end mill 133 to form convex portions 135 which are convex to the left and right of the horizontal surface portion 130. It is because it is preferable to have a thickness in a slightly convex shape because the peripheral area narrowed by the formation of the conical groove 50 and the horizontal surface portion 130 of 1) tends to be fragile. Another reason is that the brightness can be improved by bringing the convex lens effect and the light dispersion effect like the lens.

In addition, the conical groove 50 formed on the lower surface of the lens-shaped light guide plate 1 is also made by processing by the end mill 33 in the same manner. In the center of the position of the conical groove 50 formed on the lower surface of the lens-shaped light guide plate 1, to form a conical groove surface 150 made of a conical shape, the outer circumference to form a stepped section 151 having a stepped end in cross section To this end, the conical groove 50 formed on the lower surface is processed into an end mill 133, the end mill 133 has a corresponding shape that can be processed into the shape of the conical groove surface 150 and the stepped portion 151 To have

As described above, when the direct processing molding is performed on the lenticular light guide plate 1 by the end mill 133, the groove is formed on the upper surface of the lenticular light guide plate 1 in one process, so the processing is very easy and the production speed is increased. Can greatly increase

Therefore, expensive injection mold equipment for injection molding is unnecessary as in the prior art, and secondary processing of concave grooves after injection molding is unnecessary.

In the case of using the lens-shaped light guide plate of FIG. 5, a light source 20 including an LED or the like may be provided on the bottom thereof.

The conical groove 50 of the light guide plate 1 is a groove formed to accommodate the light source 20 and reduce the thickness of the entire product.

Thus, when the light source 20, for example, an LED is provided, it can be made into the structure which light-emits in a light reflection board itself. It can be used as a light reflector for various advertisements requiring lighting and other promotional purposes.

6 is another embodiment of the present invention.

In the present exemplary embodiment, the reflective sheets 5 and 10 are installed on the upper and the bottom of the lenticular light guide plate 1, and the light source 20 including the LED is installed in the conical groove 50 formed concavely in the lower part of the light guide plate. Configured. According to such a structure, the light scattering plate can increase the efficiency of light diffusion, dispersion, and uniformity and increase the light reflection efficiency by the light irradiation by the LED.

Thus, compared with other products that use the same number of LEDs, the illumination and brightness can be further increased, and the number of LEDs can be reduced, thereby increasing power saving efficiency.

1 LGP 2 dots
3 Dot Sheet 5 Reflective Sheet
6 Adhesive Layer 8 Bottom Adhesive Layer
10 Reflective sheet 11 High density
12 Low Density 20 Light Source
30 Light Control Sheet 33 Adhesive Beads
50 conical grooves

Claims (12)

High brightness reflective sheet 5 made of any one of a transparent or translucent material,
A light guide plate 1 formed under the high-brightness reflective sheet 5,
It is formed on the lower part of the light guide plate 1 and includes a reflective sheet 10 which prevents light from leaking downward and reflects light upward.
The dot sheet 3 is integrally formed on the reflective sheet 10, or a dot sheet 3 having dots is formed on the reflective sheet.
Upper and lower surfaces of the reflective sheet 5 and the light guide plate 1 are selectively formed to further control the brightness of the reflected light by further forming a light adjusting sheet 30.
Dots formed on the dot sheet 3 and the light control sheet 30 are selectively formed into a high density portion 11 and a low density portion 12 according to the density of forming the dot. Reflector delete The method of claim 1,
The light reflector, characterized in that the dot (2) comprises an adhesive The method of claim 1,
Light reflecting plate, characterized in that the dot (2) comprises a pigment The method of claim 1,
The light reflection plate, characterized in that the adhesive layer 6 made of an adhesive is formed between the light guide plate 1 and the reflective sheet 5 and integrally attached thereto. delete The method of claim 1,
The light reflection plate, characterized in that the upper and lower surfaces of the reflective sheet 5 and the light guide plate 1 are selectively formed to control the brightness of the reflected light by selectively forming colored dots 31. The method of claim 1,
The light reflection plate, characterized in that the bottom surface of the light guide plate (1) is formed by any one of forming a bottom adhesive layer 8 or an adhesive bead 33 made of beads. delete The method according to any one of claims 1, 3, 4, 5, 7, and 8,
The light guide plate is a light reflection plate, characterized in that the lens type light guide plate to form a concave groove 50 in the lower surface.
11. The method of claim 10,
The light reflection plate further comprises a light source including an LED under the conical groove 50 of the light guide plate. The method of claim 1,
Dots formed on the dot sheet 3 and the light control sheet are selectively, the light reflection plate composed of a regular interval of the density for forming the dot as a whole

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