KR20090092658A - United diffuser complex prism sheet and method of manufacture thereof - Google Patents

Abstract

A complex prism sheet for a backlight unit and a manufacturing method thereof are provided to prevent the inflow of foreign material by coupling a diffusion layer and a protection layer in the prism sheet. A complex prism sheet is comprised of a lower layer(120), a middle layer(130), an upper layer(150) and an air layer(170). A light diffusing structure is formed in a lower part of the lower layer. The middle layer is stacked in the upper side of the lower layer. The columnar prism shapes are formed in the upper side in parallel. The lower layer, the middle layer, and the upper layer are integrated. The air layer is formed between the valley of the prism shape of the middle layer and the lower side of the upper layer. The top of the prism shape of the middle layer and the lower side of the upper layer are bonded with adhesive.

Description

United diffuser complex prism sheet and method of manufacture thereof

The present invention relates to a composite prism sheet for a backlight unit in which a diffusion means is integrated and a method of manufacturing the same. More specifically, the present invention relates to a composite prism sheet for a backlight unit having a diffusion layer bonded to a prism sheet, and a method of manufacturing the same.

1 is a view showing the configuration of a conventional backlight unit.

As shown in FIG. 1, the conventional backlight unit includes a fluorescent lamp 1, which is a linear light source, and a lamp reflector 2 reflecting light from the fluorescent lamp 1, for converting light from the fluorescent lamp 1 into a surface light source. It is disposed on one side of the light guide plate 3, and a reflecting sheet 4 for preventing light leakage is disposed under the light guide plate 3. On the upper part of the light guide plate 3, there is a diffusion sheet 5 for uniformly diffusing light, and a prism sheet 6 having a plurality of triangular linear prisms 8 and 9, respectively, for condensing scattered light thereon. 7) lies. The two prism sheets 6 and 7 are arranged such that the linear prisms 8 and 9 are perpendicular to each other, so that light is collected in different directions, and the prism sheet 9 on the upper prism sheet 9 is caused by scratches or foreign matters. The protective sheet 10 is disposed to prevent defects such as nailing and the like, and each component is made of a backlight unit by assembling each other.

Conventional prism sheet has a prism-shaped irregularity on one side, and when assembling the backlight unit, defects caused by scratching the prism shape, foreign material defects caused by fine foreign matter being stuck in the prism shape valleys, and friction with the protective sheet Even if it is carefully assembled due to factors such as poor white spots caused by the occurrence of prism-shaped wounds, many assembly defects occur, resulting in low productivity, and in the case of defects, loss of material cost due to remanufacturing.

In addition, when assembling, there was a problem in that the diffusion sheet, the prism sheet, and the protective sheet were laminated separately in order.

The present invention is to solve the above problems, the present invention is to protect the prism shape from scratches, to prevent foreign matter from entering the prism-shaped bone portion when assembling the backlight unit, and to reduce the assembly time and at the same time assembling In order to simplify the operation and reduce the cost, a composite prism sheet and a method of manufacturing the composite prism sheet having a diffusion layer and a protective layer formed on the exterior of the prism sheet and a prism shape formed therein are integrated by combining various types of optical sheets. The purpose is to provide.

A prism sheet for a backlight unit, comprising: a lower layer portion; A middle layer portion laminated on an upper surface of the lower layer portion and having a plurality of columnar prism shapes formed in parallel to each other; A composite prism sheet is provided, including an upper layer portion stacked on an upper surface of the middle layer portion and having a structure for diffusing light on the upper surface, wherein the lower layer portion, the middle layer portion, and the upper layer portion are integrated.

According to the present invention, since the prism shape is formed inside the prism sheet and the diffusion layer and the protective layer are coupled to the prism sheet, the risk of defects due to scratching or foreign matter mixing during the backlight unit assembly can be greatly reduced. The workability is improved due to less friction of the white spots, and the productivity can be improved by greatly reducing the defective rate. Also, it is possible to reduce the assembly time by reducing the assembly time and simplify the assembly work by combining various kinds of optical sheets.

In addition, by integrating the diffusion means in the prism sheet, it is possible to reduce the assembly time and simplify the assembly work to reduce the cost.

1 is a view showing a conventional backlight unit.

2 is a perspective view of a composite prism sheet incorporating a diffusion means according to a first embodiment of the present invention.

3 is a bottom perspective view of a composite prism sheet in which diffusion means for limiting the size and density of the protrusions formed in the lower diffusion part of FIG. 2 is integrated.

4 is a perspective view of a composite prism sheet incorporating a diffusion means according to a second embodiment of the present invention.

5 is a perspective view of a composite prism sheet incorporating a diffusion means according to a third embodiment of the present invention.

6 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fourth embodiment of the present invention.

7 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fifth embodiment of the present invention.

8 is a perspective view of a prism sheet incorporating a diffusion means and a protection means according to the sixth embodiment of the present invention.

9 is a perspective view of a prism sheet in which the diffusion means and the protection means according to the seventh embodiment of the present invention are integrated.

10 is a perspective view of a prism sheet incorporating a diffusion means and a protection means according to an eighth embodiment of the present invention.

11 is a perspective view of a composite prism sheet incorporating a diffusion means according to a ninth embodiment of the present invention.

12 is a perspective view of a composite prism sheet incorporating a diffusion means according to a tenth embodiment of the present invention.

13 is a perspective view of a composite prism sheet incorporating a diffusion means according to an eleventh embodiment of the present invention.

14 is a perspective view of a composite prism sheet incorporating a diffusion means according to a twelfth embodiment of the present invention.

15 is a perspective view of a composite prism sheet incorporating a diffusion means according to a thirteenth embodiment of the present invention.

16 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fourteenth embodiment of the present invention.

17 is a flowchart for explaining a method of manufacturing a composite prism sheet in which diffusion means according to the first and third embodiments of the present invention are integrated.

18 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the second and fourth embodiments of the present invention.

19 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the fifth and seventh embodiments of the present invention.

20 is a flowchart illustrating a method of manufacturing a composite prism sheet in which diffusion means according to sixth and eighth embodiments of the present invention are integrated.

21 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the ninth and tenth embodiments of the present invention.

FIG. 22 is a flowchart for explaining a method of manufacturing a composite prism sheet in which diffusion means according to Embodiments 11 and 12 of the present invention are integrated.

FIG. 23 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to embodiments 13 and 14 of the present invention.

24 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fifteenth embodiment of the present invention.

25 is a perspective view of a composite prism sheet incorporating a diffusion means according to a sixteenth embodiment of the present invention.

Fig. 26 is a perspective view of a composite prism sheet incorporating a diffusion means according to a seventeenth embodiment of the present invention.

27 is a perspective view of a composite prism sheet incorporating a diffusion means according to an eighteenth embodiment of the present invention.

FIG. 28 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to Embodiments 15 and 17 of the present invention.

<Description of Major Symbols in Drawing>

100: PC layer 110: PET layer

120: lower layer 130: middle layer

133: nipple area 136: bone area

137: vertex 140: second middle layer

150: upper layer 170: air layer

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the present invention.

2 is a perspective view of a composite prism sheet incorporating a diffusion means according to a first embodiment of the present invention.

As shown in FIG. 2, the composite prism sheet integrated with the diffusion means according to the first embodiment of the present invention includes a lower layer part 120, a middle layer part 130, an upper layer part 150, and an air layer 170.

The upper layer 150 is configured to uniformly diffuse light, the upper layer 150 is formed with a plurality of hemispherical protrusions for diffusing the light.

The height of the protrusions formed in the upper layer 150 is between 1 and 150 micrometers.

Limiting the density of the projections while limiting the height of the projections formed in the upper layer 150 to 1 to 50 micrometers, as shown in Figure 3, when the interval is formed in each of the projection period has a mat function that prevents sliding rather than diffusion function To have.

The lower layer portion 120 and the upper layer portion 150 is made of a synthetic resin such as polyethylene terephthalate (PET).

The middle layer 130 is composed of an ultraviolet curable or thermosetting acrylic resin.

On one surface of the middle layer 130, a plurality of polygonal pillar-like prisms having a pentagonal or triangular shape similar to a triangular prism or triangle for collecting light in the vertical direction of the upper and lower surfaces of the prism sheet in which the diffusion means and the protection means are integrated into a plurality of in parallel Formed.

The prism-shaped stem portion 133 of the middle layer 130 is bonded to each other by the lower surface and the fusion of the upper layer 150 to form an integral, the lower surface of the upper layer 150 and the bone portion of the prism shape ( Between the 136 is formed of an air layer 170.

The reason why the air layer 170 is formed is that the refractive index of air is 1, and the refractive index of other materials other than air is greater than 1, so that diffusion means are integrated when other materials other than air are filled by Snell's law. Since the light converging effect in the vertical direction of the upper and lower surfaces of the composite prism sheet is reduced, it is to obtain the maximum efficiency of the light converging effect.

The angle of the vertex angle 137 of the prism is formed between 60 degrees to 70 degrees or 80 degrees to 100 degrees to increase the light collection efficiency.

The light from the light guide plate is diffused by the diffusing prism sheet, which is a composite of the prism sheet with the diffusion sheet, and is then focused again to satisfy the luminance and viewing angle in the backlight. In this case, the inconvenience of assembling the plurality of optical sheets can be eliminated, thereby improving the workability and productivity of the sheet assembly, thereby achieving cost reduction.

4 is a perspective view of a composite prism sheet incorporating a diffusion means according to a second embodiment of the present invention.

As shown in FIG. 4, the composite prism sheet integrated with the diffusion means according to the second embodiment of the present invention includes a lower layer part 120, a middle layer part 130, an upper layer part 150, and an air layer 170.

The lower layer part 120 is configured to uniformly diffuse light, and a plurality of hemispherical protrusions are formed on the lower part of the lower layer part 120 to diffuse the light.

The height of the projections formed in the lower layer is between 1-150 micrometers.

The lower layer portion 120 and the upper layer portion 150 is made of a synthetic resin such as polyethylene terephthalate (PET).

Since the middle layer 130 and the air layer 170 are the same as the configuration of the prism sheet in which the diffusion means according to the first embodiment of the present invention is integrated, a detailed description thereof will be omitted.

The angle of the vertex angle 137 of the prism is formed between 60 degrees to 70 degrees or 80 degrees to 100 degrees to increase the light collection efficiency.

The composite prism sheet incorporating the diffusion means according to the present invention may create a hemispherical groove in the upper layer portion 150 as shown in FIG. 5 (third embodiment), and the lower layer portion 120 as shown in FIG. 6. Hemispherical grooves may be created in the fourth embodiment.

7 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fifth embodiment of the present invention.

The composite prism sheet incorporating the diffusion means according to the fifth embodiment of the present invention includes a lower layer 120, an upper layer 150, and an air layer 170, as shown in FIG. 7.

The lower layer portion 120 is composed of a PC (polycarbonate), the upper surface of the lower layer portion 120 is a polygonal pillar shape or more of a pentagonal or triangular pillar or similar shape to collect light in the vertical direction of the upper and lower surfaces of the flat prism sheet The prism shape of is formed in plural in parallel, and a number of hemispherical protrusions for diffusing light are formed on the lower surface.

The height of the protrusions formed in the lower layer 120 is between 1 and 150 micrometers.

The lower layer 120 is limited to the density of the protrusions while limiting the height of the protrusions formed in the same manner as the lower layer 120 shown in FIG. 3 between 1 and 50 micrometers. It has a mat function to prevent it.

A small amount of adhesive is applied to the prism-shaped nipple 133 of the lower layer 120, and the prism-shaped nipple and the lower surface of the upper layer 150 are bonded to each other by an adhesive to form a single body. As the adhesive, a high transparency adhesive such as a SU-polymer, an acrylic polymer, or a polyester polymer of a silicon-urethane hybrid structure is used. In this case, when the adhesive is buried too much, the prism function may be weakened and staining may occur. Therefore, it is preferable to use a small amount to maintain adhesion to each other.

The angle of the vertex angle 137 of the prism is formed between 60 degrees to 70 degrees or 80 degrees to 100 degrees to increase the light collection efficiency.

Since the upper layer 150 and the air layer 170 are the same as the structure of the composite prism sheet in which the diffusion means according to the first embodiment of the present invention is integrated, a detailed description thereof will be omitted.

The composite prism sheet incorporating the diffusion means according to the fifth embodiment of the present invention may be implemented by removing the projections on the upper surface of the upper layer and generating the projections on the lower layer as shown in FIG. 8 (sixth embodiment).

The composite prism sheet incorporating the diffusion means according to the fifth embodiment of the present invention may be generated by replacing the projection of the upper layer part 150 with a hemispherical groove as shown in FIG. 9 (seventh embodiment).

The prism sheet incorporating the diffusion means according to the sixth embodiment of the present invention may be generated by replacing the projection of the lower layer portion 120 with a hemispherical groove as shown in FIG. 10 (eighth embodiment).

11 is a perspective view of a composite prism sheet incorporating a diffusion means according to a ninth embodiment of the present invention.

As shown in FIG. 11, the composite prism sheet incorporating the diffusion means according to the ninth embodiment of the present invention has a PET layer (base layer), a projection for diffusing light under the PET layer (base layer), and a vertical direction at the top. Prismatic shape for collecting light.

The PET layer 110 is composed of a PET film, and the acrylic resin layer is uniformly applied on the upper surface of the PET layer 110, and passed through a roll engraved with a prism shape, so as to shine in the vertical direction of the upper and lower surfaces of the flat prism sheet. In order to collect the triangular prism or the shape of a polygonal prism of a polygonal column or more of a pentagonal shape similar to a triangle, a plurality of hemispherical protrusions formed of acrylic resin and diffusing light are formed on the lower surface thereof.

The composite prism sheet integrated with the diffusion means according to the ninth embodiment of the present invention may be generated by replacing the projection of the PET layer 110 with a hemispherical groove as shown in FIG. 12 (the tenth embodiment).

13 is a perspective view of a composite prism sheet incorporating a diffusion means according to an eleventh embodiment of the present invention.

As shown in FIG. 13, the prism sheet integrated with the diffusing means according to the eleventh embodiment of the present invention has a PC layer 100, a projection for diffusing light in the lower portion of the PC layer 100, and a columnar shape in the upper portion. It is made of a prism shape.

The PC layer 100 is composed of a PC film, the upper surface of the PC layer 100 is formed with a prism shape made by passing through a roll engraved with a prism shape, collecting light in the vertical direction of the upper and lower surfaces of the flat prism sheet For example, a triangular prism or a triangular prism shape of a polygonal pillar or more similar to a triangular shape is formed in parallel, and a plurality of hemispherical protrusions are formed on the lower surface to pass light through a roll having a hemispherical groove.

The composite prism sheet incorporating the diffusion means according to the eleventh embodiment of the present invention may be generated by replacing the projection of the PC layer 100 with a hemispherical groove as shown in FIG. 14 (Twelfth Embodiment).

15 is a perspective view of a composite prism sheet incorporating a diffusion means according to a thirteenth embodiment of the present invention.

As shown in FIG. 15, the composite prism sheet incorporating the diffusion means according to the thirteenth embodiment of the present invention has a PET layer 110, a protrusion for diffusing light in the lower portion of the PET layer 110, and a columnar shape in the upper portion. The prism shape and the prism shape face are formed in a shape where a circular protrusion is attached.

The PET layer 110 is composed of a PET film, the upper surface of the PET layer 110 of the polygonal pillar shape or more of a pentagonal or triangular pillar or similar shape to collect light in the vertical direction of the upper and lower surfaces of the flat prism sheet The prism shape is formed in plural in parallel, and a plurality of hemispherical protrusions for diffusing light are formed on the lower surface, and the small and large spheres are formed on the surface of the prism shape by the first nozzle and the second nozzle to add the diffusion function. It is sprayed and cured by irradiating ultraviolet rays or applying heat.

The composite prism sheet incorporating the diffusion means according to the thirteenth embodiment of the present invention may be generated by replacing the projection of the PET layer 110 with a hemispherical groove as shown in FIG.

24 is a perspective view of a composite prism sheet incorporating a diffusion means according to a fifteenth embodiment of the present invention.

The composite prism sheet incorporating the diffusion means according to the fifteenth embodiment of the present invention has a lower layer 120, a middle layer 130, a second middle layer 140, an upper layer 150 and It consists of an air layer 170.

The upper layer 150 is configured to uniformly diffuse light, the upper layer 150 is formed with a plurality of hemispherical protrusions for diffusing the light.

The height of the protrusions formed in the upper layer 150 is between 1 and 150 micrometers.

Limiting the density of the projections while limiting the height of the projections formed in the upper layer 150 to 1 to 50 micrometers, as shown in Figure 3, when the interval is formed in each of the projection period has a mat function that prevents sliding rather than diffusion function To have.

The lower layer portion 120 and the upper layer portion 150 is made of a synthetic resin such as polyethylene terephthalate (PET).

The middle layer 130 and the second middle layer is composed of an ultraviolet curable or thermosetting acrylic resin.

On one surface of the middle layer 130, a plurality of polygonal pillar-like prisms having a pentagonal or triangular shape similar to a triangular prism or triangle for collecting light in the vertical direction of the upper and lower surfaces of the prism sheet in which the diffusion means and the protection means are integrated into a plurality of in parallel Formed.

The prism-shaped tip portion 133 of the middle layer portion 130 is bonded to each other by the lower surface and the fusion of the second middle layer portion 140 to form an integral, the lower surface of the second middle layer portion 150 and the Between the prism-shaped bone portions 136 is formed of an air layer 170.

The reason why the air layer 170 is formed is that the refractive index of air is 1, and the refractive index of other materials other than air is greater than 1, so that diffusion means are integrated when other materials other than air are filled by Snell's law. Since the light converging effect in the vertical direction of the upper and lower surfaces of the composite prism sheet is reduced, it is to obtain the maximum efficiency of the light converging effect.

The angle of the vertex angle 137 of the prism is formed between 60 degrees to 70 degrees or 80 degrees to 100 degrees to increase the light collection efficiency.

The light from the light guide plate is diffused by the diffusing prism sheet, which is a composite of the prism sheet with the diffusion sheet, and is then focused again to satisfy the luminance and viewing angle in the backlight. In this case, the inconvenience of assembling the plurality of optical sheets can be eliminated, thereby improving the workability and productivity of the sheet assembly, thereby achieving cost reduction.

25 is a perspective view of a composite prism sheet incorporating a diffusion means according to a sixteenth embodiment of the present invention.

As shown in FIG. 25, the composite prism sheet incorporating the diffusion means according to the sixteenth embodiment of the present invention may include a lower layer part 120, a middle layer part 130, a second middle layer part 140, an upper layer part 150, and the like. It consists of an air layer 170.

The lower layer part 120 is configured to uniformly diffuse light, and a plurality of hemispherical protrusions are formed on the lower part of the lower layer part 120 to diffuse the light.

The height of the projections formed in the lower layer is between 1-150 micrometers.

The lower layer portion 120 and the upper layer portion 150 is made of a synthetic resin such as polyethylene terephthalate (PET).

Since the middle layer 130, the second middle layer 140, and the air layer 170 are the same as the structure of the prism sheet in which the diffusion means according to the fifteenth embodiment of the present invention is integrated, a detailed description thereof will be omitted.

The angle of the vertex angle 137 of the prism is formed between 60 degrees to 70 degrees or 80 degrees to 100 degrees to increase the light collection efficiency.

The composite prism sheet incorporating the diffusion means according to the present invention may create a hemispherical groove in the upper layer portion 150 as shown in FIG. 26 (17th embodiment), and the lower layer portion 120 as shown in FIG. 27. Hemispherical grooves may be created in the eighteenth embodiment.

FIG. 17 is a flowchart for explaining a method of manufacturing a composite prism sheet in which diffusion means according to the first and third embodiments of the present invention are integrated.

The manufacturing method is

Passing the upper layer part 150 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves on the upper surface of the upper layer part 150, and cooling the plurality of hemispherical protrusions or grooves to harden completely. (S110);

A second step (S120) of applying a UV curable or heat curable acrylic resin in a predetermined thickness to a top surface of the lower layer part 120;

In step 2, the lower layer portion 120 coated with the acrylic resin on the upper surface is passed through a roll engraved with a prism shape to form a prism shape on the acrylic resin layer, and the acrylic resin layer having the prism shape is completely irradiated with ultraviolet rays or heat. Three steps (S130) to form a middle layer 130 by curing;

Step 4 (S140) of applying the adhesive to the prism-shaped nipple portion 133 of the middle layer 130 and the lower layer 120 and the upper layer 150 in close contact with each other so as to be in contact with each other;

It comprises a five step (S150) for drying the adhesive applied to the thickening portion 130.

18 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the second and fourth embodiments of the present invention.

The manufacturing method is

Passing the lower layer part 120 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves on the lower surface of the lower layer part 120, and cooling the plurality of hemispherical protrusions or grooves to harden completely. (S210);

A second step (S220) of applying a UV curable or heat curable acrylic resin in a predetermined thickness to a top surface of the lower layer 120;

In step 2, the lower layer portion 120 coated with the acrylic resin on the upper surface is passed through a roll engraved with a prism shape to form a prism shape on the acrylic resin layer, and the acrylic resin layer having the prism shape is completely irradiated with ultraviolet rays or heat. Three steps (S230) to harden to form the middle layer 130;

4 steps (S240) of applying the adhesive to the prism-shaped nipple portion 133 of the middle layer 130 and the lower layer portion 120 and the upper layer portion 150 in close contact with each other to abut the upper layer portion;

It comprises five steps (S250) for drying the adhesive applied to the thickening portion 130.

19 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the fifth and seventh embodiments of the present invention.

The manufacturing method is

A first step (S310) of forming a prism shape on the upper surface of the lower layer part 120 by passing the lower layer part 120 through a roll engraved with a prism shape, and cooling and completely curing the prism shape;

Passing the upper layer part 150 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves on the upper surface of the upper layer part 150, and cooling the plurality of hemispherical protrusions or grooves to harden completely. (S320);

3 steps (S330) of applying the adhesive to the prism-shaped nipple portion 133 of the lower layer 120 and bringing the lower layer 120 and the upper layer 150 into close contact with each other so as to be in contact with each other;

It comprises a four step (S340) for drying the adhesive applied to the lower layer portion 120.

20 is a flowchart illustrating a method of manufacturing a composite prism sheet in which diffusion means according to sixth and eighth embodiments of the present invention are integrated.

The manufacturing method is

The lower layer portion 120 is formed with a hemispherical groove or protrusion on the lower roll, and the upper roll passes through a roll engraved with a prism shape, and a plurality of hemispherical protrusions or grooves are formed on the lower surface of the lower layer 120 to form a prism shape. A first step (S410) of completely curing the hemispherical protrusion or groove and prism shape by cooling;

Applying an adhesive to the prismatic stem portion 133 of the lower layer portion 120 and adhering the lower layer portion 120 and the upper layer portion 150 to be in close contact with the upper layer portion (S420);

It comprises three steps (S430) for drying the adhesive applied to the lower layer portion 120.

21 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to the ninth and tenth embodiments of the present invention.

The manufacturing method is

A first step (S510) of applying a first flow resin in a predetermined thickness to a lower surface of the PET layer 110;

Passing the PET layer 110 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves in the first flow resin layer in a fluid state, and irradiate ultraviolet rays or heat to the first flow resin layer Two steps (S520) to cure;

Three steps (S530) of applying a second flow resin in a predetermined thickness on the upper surface of the PET layer 110;

Passing the PET layer 110 through a roll engraved with a prism shape to form a prism shape in the second flow resin layer, and irradiating ultraviolet rays or applying heat to the second flow resin layer (S540). .

FIG. 22 is a flowchart for explaining a method of manufacturing a composite prism sheet in which diffusion means according to Embodiments 11 and 12 of the present invention are integrated.

The manufacturing method is

The PC layer (base plate) is engraved with a number of hemispherical grooves or projections on the lower roll, and passes through a roll engraved with a prism shape on the upper roll to form a number of hemispherical protrusions or grooves on the lower surface of the lower layer 120 to form a prism shape on the upper surface. , One step (S610) to cool the hemispherical protrusions or grooves and prisms completely cured.

FIG. 23 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to embodiments 13 and 14 of the present invention.

The manufacturing method is

A first step (S710) of applying a first flow resin in a predetermined thickness to a lower surface of the PET layer 110; Passing the PET layer 110 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves in the first flow resin layer in a fluid state, and irradiate ultraviolet rays or heat to the first flow resin layer Two steps (S720) to cure; 3 steps (S730) of applying a second flow resin in a predetermined thickness on the upper surface of the PET layer 110; Passing the PET layer 110 through a roll engraved with a prism shape to form a prism shape in the second flow resin layer, and curing the second flow resin layer by irradiating ultraviolet rays or applying heat to the second flow resin layer (S740); A fifth step (S750) of spraying a large sphere made of an acrylic resin on the prism surface through the first nozzle and irradiating ultraviolet rays or applying heat; It comprises a sixth step (S760) for spraying a small spherical sphere made of acrylic resin to the prism surface through the second nozzle and irradiated with ultraviolet rays or heat.

FIG. 28 is a flowchart for explaining a method of manufacturing a composite prism sheet incorporating diffusion means according to Embodiments 15 and 17 of the present invention.

The manufacturing method first passes the upper layer portion 150 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves on the upper surface of the upper layer portion 150, and by cooling the plurality of hemispherical protrusions or grooves One step (S810) to completely cure; Step 2 (S820) of applying a predetermined thickness of the ultraviolet curable or thermosetting first acrylic resin in a fluid state on the upper surface of the lower layer portion 120; In step 2, the lower layer portion 120 coated with the acrylic resin on the upper surface is passed through a roll engraved with a prism shape to form a prism shape on the first acrylic resin layer, and the first acrylic having the prism shape by irradiating ultraviolet rays or applying heat. Three steps (S830) of completely curing the resin layer to form the middle layer part 130; Applying a second acrylic resin on the lower surface of the upper layer and contacting the lower layer 120 and the upper layer 150 to each other such that the upper layer and the prism shape contact each other (S840);

And a fifth step (S850) of forming a second middle layer by curing ultraviolet rays or applying heat to the second flow resin layer in the flow state.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. You will understand that. Accordingly, the embodiments described above are exemplary in all respects and not restrictive.

Claims (27)

In the prism sheet for a backlight unit, Lower layer; A middle layer portion laminated on an upper surface of the lower layer portion and having a plurality of columnar prism shapes formed in parallel to each other; It is laminated on the upper surface of the middle layer portion and includes an upper layer portion formed with a structure for diffusing light on the upper surface, And said lower layer, middle layer and upper layer are integral. In the prism sheet for a backlight unit, A lower layer portion having a structure for diffusing light on a lower surface thereof; A middle layer portion laminated on an upper surface of the lower layer portion and having a plurality of columnar prism shapes formed in parallel to each other; An upper layer part laminated on an upper surface of the middle layer part, And said lower layer, middle layer and upper layer are integral. The method according to claim 1 or 2, An air layer is formed between the lower surface of the upper layer and the prism-shaped bone portion of the middle layer, and the prism-shaped nipple of the middle layer and the lower surface of the upper layer are bonded by an adhesive. In the prism sheet for a backlight unit, A lower layer portion having a plurality of columnar prism shapes formed in parallel with each other on an upper surface thereof; An upper layer portion formed on the upper surface of the lower layer portion and having a structure for diffusing light on the upper surface; The lower prism sheet and the upper layer portion are integral, characterized in that the composite prism sheet. In the prism sheet for a backlight unit, A lower layer portion having a structure for diffusing light on a lower surface thereof and having a plurality of columnar prism shapes formed on the upper surface in parallel with each other; An upper layer part laminated on an upper surface of the lower layer part, The lower prism sheet and the upper layer portion are integral, characterized in that the composite prism sheet. The method according to claim 4 or 5, An air layer is formed between the lower surface of the upper layer and the prism-shaped valleys of the lower layer, and the prismatic stem of the lower layer and the lower surface of the upper layer are bonded by an adhesive. In the prism sheet for a backlight unit, A composite prism sheet comprising a structure for diffusing light on a lower surface thereof and a plurality of columnar prism shapes formed on the upper surface in parallel to each other. The method according to claim 7, A composite prism sheet, characterized in that a plurality of diffusion means is further formed on the inclined surface of the prism shape. The method according to claim 8, The diffusion means is a spherical protrusion, the composite prism sheet, characterized in that consisting of two large and small. In the prism sheet for a backlight unit, Lower layer; A middle layer portion laminated on an upper surface of the lower layer portion and having a plurality of columnar prism shapes formed in parallel to each other; A second middle layer part laminated on an upper surface of the middle layer part; An upper layer part laminated on an upper surface of the second middle layer part and having a structure for diffusing light thereon; The lower prism sheet, the middle layer, the second intermediate layer and the upper layer portion is a composite prism sheet, characterized in that unitary. In the prism sheet for a backlight unit, A lower layer portion having a structure for diffusing light on a lower surface thereof; A middle layer portion laminated on an upper surface of the lower layer portion and having a plurality of columnar prism shapes formed in parallel to each other; A second middle layer part laminated on an upper surface of the middle layer part; An upper layer part laminated on an upper surface of the second middle layer part, The lower prism sheet, the middle layer, the second intermediate layer and the upper layer portion is a composite prism sheet, characterized in that unitary. The method according to claim 10 or 11, An air layer is formed between the lower surface of the second middle layer portion and the prism-shaped bone portion of the middle layer portion, and the middle layer portion and the second middle layer portion are integrated with each other by fusion welding. The method according to any one of claims 1, 2, 4, 5, 7, 10, 11, The light diffusing structure is a composite prism sheet, characterized in that a plurality of hemispherical protrusions or a plurality of hemispherical grooves. The method according to any one of claims 1, 2, 4, 5, 10, 11, The vertex angle of the prism shape is a composite prism sheet integrated with a diffusion means, characterized in that 60 to 70 degrees or 80 to 100 degrees. The method according to claim 3, The adhesive is a composite prism sheet, characterized in that any one of a SU-polymer, an acrylic polymer, a polyester polymer of a silicon-urethane hybrid structure. The method according to claim 6, The adhesive is a composite prism sheet, characterized in that any one of a SU-polymer, an acrylic polymer, a polyester polymer of a silicon-urethane hybrid structure. The method according to claim 10 or 11, The upper layer portion and the lower layer portion is made of PET, the middle layer, the second middle layer portion is a prism sheet integrated with a diffusion means, characterized in that composed of an ultraviolet curable or thermosetting acrylic resin. In the method of manufacturing a composite prism sheet, When the lower layer portion 120 is passed through a roll engraved with a plurality of hemispherical grooves or protrusions, a first step of forming a plurality of hemispherical protrusions or grooves, and then cooling and curing the lower layer portion 120; Applying a flow resin in a predetermined thickness to an upper surface of the lower layer part 120; Passing the lower layer part 120 through a roll having a prism shape to form a prism shape in the flow resin layer, and curing the flow resin layer by irradiating ultraviolet rays or applying heat to the flow resin layer; Applying an adhesive to the prism-shaped nipple and bringing the lower layer and the upper layer into close contact with one surface of the prism-shaped nipple and the upper layer 150; And Composite prism sheet manufacturing method comprising the step of drying the adhesive. In the method of manufacturing a composite prism sheet, A first step of forming a plurality of hemispherical protrusions or grooves on the upper surface by passing the upper layer part 150 through a roll engraved with a plurality of hemispherical grooves or protrusions, and then cooling and curing the upper layer part 150; Applying a flow resin in a predetermined thickness to an upper surface of the lower layer part 120; Passing the lower layer part 120 through a roll having a prism shape to form a prism shape in the flow resin layer, and curing the flow resin layer by irradiating ultraviolet rays or applying heat to the flow resin layer; Applying an adhesive to the prism-shaped nipple and bringing the lower layer 120 and the upper layer 150 into close contact with one surface of the prism-shaped nipple and the upper layer 150; And Composite prism sheet manufacturing method comprising the step of drying the adhesive. In the method of manufacturing a composite prism sheet, The lower layer portion 120 is engraved with a prism shape on the upper roll, and passed through a roll engraved with a plurality of hemispherical grooves or protrusions on the lower roll to form a prism shape on the upper surface, and a plurality of hemispherical protrusions or grooves on the lower surface, and then the lower layer portion. Cooling and curing step 120; Applying an adhesive to the prism-shaped nipple and bringing the lower layer 120 and the upper layer 150 into close contact with one surface of the prism-shaped nipple and the upper layer 150; And Composite prism sheet manufacturing method comprising the three steps of drying the adhesive. In the method of manufacturing a composite prism sheet, Passing the lower layer portion 120 through a roll engraved with a prism shape to form a prism shape on the upper surface, and then cooling and curing the lower layer portion 120; Passing the upper layer part 150 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves on the upper surface, and then cooling and curing the upper layer part 150; Applying an adhesive to the prism-shaped nipple and bringing the lower layer 120 and the upper layer 150 into close contact with one surface of the prism-shaped nipple and the upper layer 150; And Composite prism sheet manufacturing method comprising the step of drying the adhesive. In the method of manufacturing a composite prism sheet, Applying a first flow resin in a predetermined thickness to a top surface of the PET layer 110; Passing the PET layer 110 through a roll engraved with a plurality of hemispherical grooves or protrusions to form a plurality of hemispherical protrusions or grooves in the first flow resin layer in a fluid state, and irradiate ultraviolet rays or heat to the first flow resin layer Two steps of curing; Applying a second flow resin in a predetermined thickness to a top surface of the PET layer 110; Passing the PET layer 110 through a prism-shaped roll to form a prism shape in the second flow resin layer, and irradiating ultraviolet rays or applying heat to the second flow resin layer, characterized in that it comprises four steps. Method of manufacturing a composite prism sheet. In the method of manufacturing a composite prism sheet, The PC layer 100 is passed through a roll engraved with a plurality of hemispherical grooves or protrusions on the lower roll and a prism shape on the upper roll, the lower surface of the lower layer 120 has a plurality of hemispherical protrusions or grooves on the upper surface of the prism shape. Forming, and cooling the hard hemispherical protrusions or grooves and prism shape comprising a step of producing a composite prism sheet. The method according to claim 22 or 23, And forming a diffusion means on the inclined surface of the prism shape. The method of claim 24, Forming the diffusion means, A step of injecting the flow resin onto the prism-shaped inclined surface through the first nozzle and curing the flow resin by irradiating ultraviolet rays or applying heat; It is made of step b for spraying the flow resin on the prism-shaped slope through the second nozzle and curing the flow resin by irradiating ultraviolet rays or applying heat. And the first nozzle and the second nozzle are different in size from each other. The method of claim 24, Forming the diffusion means, A method of manufacturing a composite prism sheet, characterized in that a spherical diffusion means is formed by spraying a flow resin through a spray nozzle consisting of a large nozzle hole and a small nozzle hole. In the method of manufacturing a composite prism sheet, Passing the lower layer portion 120 through a roll engraved with a plurality of hemispherical grooves or protrusions, and then forming a plurality of hemispherical protrusions or grooves, and then cooling and curing the lower layer portion 120; 2 steps of applying a first flow resin in a predetermined thickness to the upper surface of the lower layer portion 120; Passing the lower layer part 12 through a roll engraved with a prism shape to form a prism shape in the first flow resin layer, and curing the first flow resin layer by irradiating ultraviolet rays or applying heat to the first flow resin layer; Applying a second flow resin in a flow state to a lower surface of the upper layer part (150) and bringing the lower layer part (120) into close contact with the upper layer part (150) such that the top of the prism shape and the second flow resin layer overlap each other; And And irradiating ultraviolet rays or applying heat to the second flow resin layer in the flow state to form a second middle layer portion. 5.