KR101152966B1 - Optical element and manufacturing method of the same - Google Patents

Abstract

PURPOSE: An optical member and a manufacturing method thereof are provided to increase brightness by not using polyethylene terephthalate(PET) between a diffusion plate and a refraction plate, thereby expanding a view angle and preventing a light leakage phenomenon of a liquid crystal display panel. CONSTITUTION: An optical member comprises a light guide plate(110), a diffusion plate(130), and a refraction plate(150). A plurality of prism parts is formed on the upper side of the refraction plate. The diffusion part is arranged on the lower part of the refraction plate. A plurality of diffusion units is formed on the upper or lower surface of the diffusion plate for diffusing light. The diffusion plate and the refraction plate are made of resin which has adhesive or bonding properties. The refraction plate and the diffusion plate are formed into one body.

Description

Optical member and its manufacturing method {OPTICAL ELEMENT AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to an optical member and a method for manufacturing the same, and more particularly, to an optical member and a method for manufacturing the same used in a liquid crystal display device.

In general, a liquid crystal display (LCD) is a representative display device widely used in various fields. Since the liquid crystal display is a non-light emitting device, a backlight unit for generating light is required.

Therefore, such a backlight unit is an important factor for determining the size and light efficiency of the liquid crystal display, and is composed of an assembly of various optical members.

In general, the backlight unit includes a light source, a light guide plate, a reflecting plate, a diffusion sheet, a prism sheet, and a protective sheet.

Light generated from the light source is directed to the diffusion sheet through the light guide plate, and light diffused by the diffusion sheet is directed to the liquid crystal display panel through the first and second prism sheets.

The diffusion sheet serves to provide uniform luminance over the entire area, and the prism sheet serves to improve luminance in a specific viewing angle range. The luminance improvement at this particular viewing angle may be realized by condensing by the prism structure.

Referring to the registration number 10-0898102, the structure of the optical member used in the conventional liquid crystal display device is described in detail.

However, in the conventional liquid crystal display device, since the diffusion sheet and the prism sheet are provided by simple contact, the diffusion sheet and the prism sheet may be misaligned when the liquid crystal display device is used for a long time.

Therefore, a light leakage phenomenon may occur in the liquid crystal display panel or the light may not be properly refracted to the liquid crystal display panel, resulting in a narrow viewing angle or a problem in that the screen cannot be viewed at a specific viewing angle.

In addition, the prism sheet itself is polyethylene terephthalate (PET), or when a plate of PET material is inserted between the prism sheet and the diffusion sheet, there is a problem that luminance is reduced by PET.

The present invention is to solve the above-mentioned problems of the prior art, an optical member formed of a diffusion plate for diffusing and refracting light and the refracting plate is composed of ultraviolet curable resin having adhesiveness, and the diffusion plate and the refracting plate are integrally manufactured and its manufacture To provide a method.

According to the present invention for achieving the above object, a plurality of prism portion is formed on the upper side, the refractive plate is provided with at least one; And a diffusion plate provided below the refractive plate and having a plurality of diffusion parts formed on at least one of an upper surface and a lower surface to diffuse light, wherein the refractive plate and the diffusion plate are made of a resin having adhesiveness. Is formed, the refractive plate and the diffusion plate provides an optical member formed integrally.

According to the present invention for achieving the above object, manufacturing a diffusion plate formed with a plurality of diffusion parts on at least one surface; Manufacturing a refractive plate having a plurality of prisms formed thereon; And integrating the diffusion plate and the refractive plate by adhering the diffusion plate, wherein the diffusion plate and the refractive plate are made of an ultraviolet curable resin.

According to the present invention, since the diffusion plate and the refraction plate for diffusing and refracting light are integrally formed with an adhesive UV curable resin, handling is facilitated, and since the PET is not used between the diffusion plate and the refraction plate, the luminance is increased and the liquid crystal is increased. It is possible to provide an optical member and a method of manufacturing the same, which have an effect of preventing light leakage from occurring in the display panel and extending a viewing angle.

1 is a perspective view of an optical member according to a first embodiment of the present invention.
2 is a cross-sectional view of the optical member according to FIG. 1.
3A and 4D are perspective views illustrating various embodiments of the refractive plate according to the present invention.
5 and 12 are cross-sectional views showing various embodiments of the diffusion plate according to the present invention.
13 to 15 are flowcharts illustrating a manufacturing process of an optical member according to an exemplary embodiment of the present invention.
16 is a cross-sectional view showing a part of the manufacturing process of the diffusion plate according to the present invention.
17A and 17B are cross-sectional views illustrating a part of a manufacturing process of the refractive plate according to the present invention.
17C is a cross-sectional view illustrating an integration process of a diffusion plate and a refractive plate according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, it is not only "directly connected" but also "electrically or optically connected" with another element in the middle. Include. In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

First, prior to describing the present invention, the optical member according to the present invention may be applied to all light receiving display devices such as an electrophoretic display device as well as a liquid crystal display (LCD).

1 is a perspective view of an optical member according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the optical member according to Figure 1, Figures 3a and 4d is a perspective view showing various embodiments of the refractive plate according to the present invention 5 and 12 are cross-sectional views showing various embodiments of the diffusion plate according to the present invention.

First, referring to FIG. 1, an optical member according to the present invention includes a light guide plate 110, a diffusion plate 130, and a refractive plate 150, and the diffusion plate 130 and the refractive plate 150 are UV curable. It is made of a transparent resin, the diffusion plate 130 and the refractive plate 150 is integrally formed.

Here, the integrally formed means that the diffusion plate 130 and the refracting plate 150 are formed as one body so as not to be separated by an external force.

The light guide plate 110 is a component that converts light incident from the lamp 115 into uniform plane light, and is generally made of PMMA (polymethymethacrylate), which is an acrylic resin.

1 and 2, the lamp 115 is illustrated as being provided on the side surface of the light guide plate 110. The position of the lamp 115 may be provided at various positions without being limited thereto.

In particular, the lamp 115 is provided on the lower surface of the light guide plate 110 in a direct type, except in the case where the lamp 115 is provided in the present embodiment.

The lamp 115 mounted on the light guide plate 110 may include a Cold Cathode Fluorescent Lamp (CCFL), a Light Emitting Diode (LED), and an Electro Luminescent (EL).

1 and 2, although the light guide plate 110 appears to be provided in the present invention, the base plate (not shown) may be provided to facilitate handling when manufacturing the optical member without being limited to the light guide plate 110.

The diffusion plate 130a provided on the light guide plate diffuses light transmitted from the light source through the light guide plate 110 and transmits the light to the refractive plate 150.

In the present invention, the refractive plate 150 is made of a transparent UV curable resin while being tacky.

The refracting plate 150 serves to refract the light so that the light transmitted from the diffusion plate 130a is transmitted to the display panel, and a plurality of prisms capable of refracting the light on the second adhesive surface of the refracting plate 150. The part 155 is formed.

As illustrated in FIG. 1, a plurality of prism units 155 are formed along the z-axis length direction when referring to the coordinates illustrated in FIG. 1.

In one embodiment, the prism portion 155 is formed in a triangular cross section in the X-axis direction. However, the shape of the prism portion 155 need not be limited to a triangular shape, and may be formed in various shapes.

In addition, the surface of the prism portion 155 may include a fine concave-convex portion that can adjust the brightness or transmittance.

In view of the fact that the vertex angle of the conventional prism portion 155 is 90 degrees, the plurality of prism portions 155 preferably have a vertex angle smaller than 90 degrees, and more preferably have a vertex angle of 80 degrees or less. Can be designed.

However, since too small a peak angle is difficult to manufacture, the peak angles of the plurality of prism portions 155 are formed to be 30 ° or more.

Meanwhile, in the optical member, a plurality of refractive plates 150 may be provided. In the present invention, two refractive plates 150 may be provided, and two refractive plates 150 may be arranged in a plurality of prism portions 155. It is provided to cross each other.

In the present invention, as described above, the refracting plate 150 and the diffusion plate 130a are adhered to each other to be integrally formed.

On the other hand, the refractive plate 150 and the diffusion plate 130a are made of UV curable resin, but the refractive plate 150 is made of UV curable resin having a higher refractive index than the diffusion plate 130a.

For example, in the present invention, the diffusion plate 130a is made of an ultraviolet curable resin having a refractive index of about 1.48, and the refractive plate 150 is made of an ultraviolet curable resin having a refractive index higher than that of the diffusion plate 130a.

Meanwhile, FIGS. 3A to 4D illustrate various embodiments of a refractive plate different from one embodiment of the present invention, which will be described below with reference to the accompanying drawings.

FIG. 3A is a refractive plate 150a having only a plurality of prism portions 155a and having a refractive groove 155a 'for refracting light once more on the upper ends of the plurality of prism portions 155a.

3B illustrates a refractive plate 150b having only a plurality of prism portions 155.

3C is a refractive plate 150c having only a plurality of prism portions 155 and having an auxiliary plate 140 adhered thereto.

3D is a refractive plate 150d having only a plurality of prismatic parts 155 and having a structure in which an adhesive resin 141 is coated thereon.

3E is a refractive plate 150e having a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and having an auxiliary plate 140 at a lower portion thereof.

3F has a structure similar to that of the refractive plate 150d shown in FIG. 3D, and includes a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and an adhesive resin 141 coated thereon. Refractive plate 150f having a structure.

3g is composed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and includes an auxiliary plate 140 at a lower portion thereof, and an adhesive resin 141 coated at a lower portion of the auxiliary plate 140. Refracting plate 150g.

3H is a refracting plate 150h having a plurality of prismatic parts 155 and having an auxiliary plate 140 at a lower portion thereof, and an adhesive resin 141 coated at a lower portion of the auxiliary plate 140. .

FIG. 3i is a refractive plate 150i having a plurality of prism portions 155 and a plurality of prism portions 155 at the lower portion thereof, and the plurality of prism portions 155 provided at the lower portion thereof It may be arranged in a direction crossing with the plurality of prism portion 155 provided.

In addition, the plurality of prism units provided below may include a plurality of prism units 155a having refractive grooves 155a 'formed at an upper end thereof.

3J is formed of a plurality of prism portions 155 in the upper portion and a plurality of prism portions 155 in the direction crossing the upper portion in the lower portion, as shown in FIG. The refractive plate 150j is provided with a structure.

FIG. 3K illustrates a refractive plate 150k having an upper structure including a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and a lower structure composed of a plurality of prism portions 155 in a direction crossing the upper portion.

In this case, the plurality of lower prism portions may be formed of a plurality of prism portions 155a having refractive grooves 155a 'formed at an upper end thereof.

3L illustrates an upper portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper portion thereof, a lower portion formed of a plurality of prism portions 155 arranged in a direction crossing the upper portion, and an auxiliary plate 140. Is a refractive plate 155l having a structure provided with adhesion.

3M is formed of a plurality of prism portions 155a having refractive grooves 155a 'formed at an upper end thereof, and an auxiliary plate 140 is attached to a lower portion of the plurality of prism portions 155a and a lower portion of the auxiliary plate 140. Refractive plate 150m having a structure in which a plurality of prism portions 155 arranged in a direction crossing the plurality of prism portions 155a in the upper portion, and the auxiliary plate 140 is provided below the plurality of prism portions 155 )to be.

FIG. 3N illustrates a refractive plate 155n having the same structure as that of FIG. 3M, wherein a plurality of prism portions 155a having a plurality of prism portions 155a ′ formed on top thereof are formed. )to be.

FIG. 3O includes a plurality of prismatic parts 155a having refractive grooves 155a 'formed at an upper end thereof, and an adhesive resin 141 is coated on a lower portion thereof, and a plurality of upper prisms on a lower portion of the adhesive resin 141. The refraction plate 150o includes a plurality of prism portions 155 arranged in a direction crossing the portion 155a and has an auxiliary plate 140 disposed under the plurality of prism portions 155.

3p is provided with an auxiliary plate 140 at a lower portion formed of a plurality of prism portions 155, an adhesive resin 141 is coated on the auxiliary plate 140, and a lower portion of the adhesive resin 141 intersects with an upper portion. The refracting plate 150p is provided with an auxiliary plate 140 under the plurality of prism portions 155 in the direction.

3q is a plurality of adhesive resins 141 coated on a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and arranged in a direction crossing the upper portion of the lower portion of the adhesive resin 141. It is a refracting plate 150q having a structure consisting of two prism parts 155 and having an auxiliary plate 140 at the bottom thereof.

In FIG. 3R, an auxiliary plate 140 is provided at a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed thereon, and an adhesive resin 141 is coated on a lower portion of the auxiliary plate 140. The refracting plate 150r is provided with an auxiliary plate 140 under the plurality of prism parts 155 arranged in the direction crossing the upper part.

3S is composed of a plurality of prism portions 155 arranged in a direction intersecting a lower portion of the plurality of prism portions 155, and an auxiliary plate 140 is provided below the lower portion of the auxiliary plate 140. The refractive resin 141 is coated on the refractive plate 150s.

FIG. 3T includes a plurality of prism portions 155 arranged in a direction intersecting a lower portion of the plurality of prism portions 155. The lower portion thereof is a refractive plate 150t having a structure coated with an adhesive resin 141.

FIG. 3U includes a plurality of prism portions 155 in a direction intersecting a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and an auxiliary plate 140 is provided at a lower portion thereof. The refracting plate 150u is coated with an adhesive resin 141 under the auxiliary plate 140.

3V is provided with an auxiliary plate 140 at a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and a plurality of prism portions 155 in an intersecting direction under the auxiliary plate 140. The auxiliary plate 140 is provided at a lower portion of the bottom plate, and the refractive plate 150v has a structure in which an adhesive resin 141 is coated on the lower side of the auxiliary plate 140.

FIG. 3W is a structure similar to that of FIG. 3V, but has a refractive plate 150w having a plurality of prism portions 155 instead of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof.

3x illustrates an adhesive resin 141 coated on a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and a plurality of adhesive resins 141 arranged in a direction crossing the upper portion of the adhesive resin 141. The auxiliary plate 140 is provided at the lower portion of the two prism portions 155, and the refractive plate 150x has a structure in which the adhesive resin 141 is coated on the lower portion of the auxiliary plate 140.

3y is provided with an auxiliary plate 140 at a lower portion formed of a plurality of prism portions 155a having a refractive groove 155a 'formed at an upper end thereof, and an adhesive resin 141 is coated and adhered to a lower portion of the auxiliary plate 140. The resin plate 141 is provided with an auxiliary plate 140 at a lower portion formed of a plurality of prism portions 155 arranged in a direction crossing the upper portion, and a structure in which an adhesive resin 141 is coated on the lower portion of the auxiliary plate 140. Is the refracting plate 150y.

3z is provided with an auxiliary plate 140 under the plurality of prism portions 155, an adhesive resin 141 is coated on the lower portion of the auxiliary plate 140, and in a direction intersecting with an upper portion under the adhesive resin 141. The refracting plate 150z is formed of a plurality of prism portions 155 arranged thereon, and an auxiliary plate 140 is provided below the auxiliary prism portion 155, and an adhesive resin 141 is coated below the auxiliary plate 140.

4A illustrates an adhesive resin 141 coated on the lower portion of the prism portion 155, and a plurality of prism portions 155 arranged in a direction crossing the upper portion of the adhesive resin 141. The refractive plate 150a ′ having the adhesive resin 141 coated on the lower portion 155 is coated.

4B is provided with an auxiliary plate 140 under the plurality of prism portions 155, and an adhesive resin 141 is coated on the lower portion of the auxiliary plate 140, and a plurality of directions in a direction intersecting the upper portion under the adhesive resin 141. Four prism portions 155 are formed, and a refractive plate 150b 'having a structure in which an adhesive resin 141 is coated thereon.

In FIG. 4C, the adhesive resin 141 is coated on the lower portion of the plurality of prism portions 155a having the refractive grooves 155a 'formed thereon, and the plurality of prism portions 155 arranged in the direction crossing the upper portion thereof are disposed on the lower portion thereof. It is made of, the refractive plate 150c 'of the structure in which the adhesive resin 141 is coated on the lower portion of the prism portion 155.

FIG. 4D illustrates an auxiliary plate 140 under the plurality of prism portions 155a having the refractive grooves 155a 'formed thereon, and an adhesive resin 141 coated on the lower portion of the auxiliary plate 140. A plurality of prism portions 155 are arranged in a direction crossing the upper portion, and a refractive plate 150d 'having an adhesive resin 141 coated on the lower portions of the plurality of prism portions 155.

On the other hand, the diffusion plate 130a, like the refractive plate 150, the diffusion plate 130a is made of an ultraviolet curable resin that is tacky, transparent, and cured by ultraviolet (UV).

The term “adhesiveness” refers to a state in which the adhesive force is semi-permanently maintained due to stickiness, and is different from the adhesion and adhesion in which the adhesive force is present only during the process and is lost after completion.

However, the diffusion plate 130a may be formed of an adhesive resin in addition to the adhesive resin, and may be cured by an infrared ray (IR) or a heat dryer (Dryer) in addition to the ultraviolet ray.

The diffusion plate 130a includes a first adhesive surface 131 and a second adhesive surface 133 spaced apart from the first adhesive surface 131.

A plurality of diffusions spaced apart from each other such that light transmitted through the light guide plate 110 is diffused to the refractive plate 150 on either of the first adhesive surface 131 or the second adhesive surface 133 of the diffusion plate 130. A portion 135 is formed.

The plurality of diffusion parts 135 are formed in a hemispherical shape as shown in FIG. 5.

In addition, the plurality of diffusion parts 135 may be formed in various shapes such as an arc shape, a quadrangle, and an inverted triangle when viewed in cross section.

5 to 12 illustrate various embodiments of the diffusion plate, which will be briefly described with reference to the drawings.

5 is a structure corresponding to an embodiment of the present invention between two diffusion plates 130a having a diffusion part 135 formed on at least one of the first adhesive surface 131 or the second adhesive surface 133. The auxiliary plate 140 is a structure that is provided with adhesion.

FIG. 6 is a structure in which only a diffusion plate 130b having a diffusion part 135 formed on at least one of the first adhesive surface 131 and the second adhesive surface 133 is provided.

7 is a diffusion portion 135 formed on at least one of the first adhesive surface 131 or the second adhesive surface 133, the diffusion is formed with a diffuser or MLA (Micro lens array, 137) on the other side The plate 130c is provided.

FIG. 8 illustrates a bead 137 ′ having a diffusion portion 135 formed on at least one of the first adhesive surface 131 and the second adhesive surface 133 and a back coating on the other surface. ) Is provided with a diffusion plate (130d) for preventing the Moire Newton ring phenomenon.

FIG. 9 is a structure in which both of the first adhesive surface 131 or the second adhesive surface 133 are provided with a diffusion plate 130e having a diffusion part 135 formed therein.

10 illustrates a diffusion plate 135 formed on at least one of the first adhesive surface 131 and the second adhesive surface 133, and the diffusion plate 130f having the auxiliary plate 140 adhered to the other surface. It is a structure provided.

FIG. 11 shows that the diffusion part 135 is formed on at least one of the first adhesive surface 131 or the second adhesive surface 133, and the auxiliary plate 140 is adhered to the other surface of the auxiliary adhesive layer 140. The other side is a structure provided with a diffusion plate (130g) is formed with a diffuser or MLA (137).

FIG. 12 is a structure similar to that of FIG. 11, wherein the diffusion part 135 is formed on at least one of the first adhesive surface 131 or the second adhesive surface 133, and the auxiliary plate 140 is adhered to the other surface. The other side of the auxiliary plate 140 has a structure in which a diffusion plate 130h having a bead 137 'is formed by back coating.

Meanwhile, the diffusion plate 130a may be manufactured using the mold 200 (see FIG. 16).

The mold 200 has a plurality of protrusions 210 spaced apart from each other on one side on which the resin 130 'is coated.

The plurality of protrusions 210 correspond to the plurality of diffusion parts 135 formed on either of the first adhesive surface 131 or the second adhesive surface 133 of the diffusion plate 130a, and in the present invention, X The cross section in the axial direction is formed into a hemisphere in the shape of a semicircle.

The sub plate 140 may be formed of an optical film such as polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), and the like, provided in the present invention between two diffusion plates 130a, but not provided. It may be.

On the other hand, as can be seen in the various embodiments described above, the lower surface of the refractive plate, the diffusion plate and the auxiliary plate may be coated with an adhesive or adhesive resin of 1 ~ 5㎛.

13 to 15 are flowcharts illustrating a manufacturing process of an optical member according to an embodiment of the present invention, FIG. 16 is a cross-sectional view illustrating a part of a manufacturing process of a diffusion plate according to the present invention, and FIGS. 17A and 17B Part of the manufacturing process of the refractive plate according to the present invention is a cross-sectional view, Figure 17c is a cross-sectional view showing the integration process of the diffusion plate and the refractive plate according to an embodiment of the present invention.

The manufacturing process of the optical member will be described based on one embodiment of the present invention.

Looking at the entire manufacturing process of the optical member with reference to Figure 13, first, the step (S305 step) of manufacturing the diffusion plate 130, the step of producing the refractive plate 150 (S310 step), and the diffusion plate 130 ) And the step (S315) of integrating the refracting plate 150, the step of preparing the light guide plate 110 (step S320), the integrated diffusion plate 130 and the refracting plate 150 and the light guide plate 110 It comprises a step of sticking (S325 step).

Each step is described in detail as follows.

Referring to FIG. 14, the manufacturing of the diffusion plate 130 may include coating an ultraviolet curable resin 130 ′ on the mold 200 (S405) and irradiating ultraviolet rays to the ultraviolet curable resin 130 ′. Thereby semi-curing the ultraviolet curable resin 130 '(step S410), and separating the semi-cured ultraviolet curable resin 130' from the mold 200 (step S415).

As shown in FIG. 16, protrusions 210 corresponding to the plurality of diffusion parts 135 to be formed on the diffusion plate 130 are formed to coat the resin on the protrusions.

The resin 130 ′ coated on the mold 200 uses an ultraviolet curable resin that is cured when irradiated with ultraviolet rays.

After the resin 130 'is coated on the mold 200, the resin 130' is irradiated with ultraviolet rays to semi-cur the resin 130 ', and then the ultraviolet curable resin 130' is separated from the mold 200. The diffusion plate 130a is produced.

And it is provided in the form as shown in Figure 5 using the produced diffusion plate (130a).

In particular, in the present invention, as shown in FIG. 5, two diffusion plates 130a are prepared, and the second adhesive surfaces 133 on which the plurality of diffusion parts 135 are not formed are faced to each other and then attached to each other.

At this time, between the two diffusion plate 130 is provided with a sub-plate 140 made of PET.

As described above, when the sub-plate 140 of PET material is provided between the two diffusion plates 130a, handling is facilitated during manufacturing of the optical member by using the diffusion plate 130a made of ultraviolet curable resin. You can get the effect to make your work easier.

Next, as shown in FIG. 15, the manufacturing of the refractive plate 150 may include: rotating the pattern mold 10 in which the plurality of protrusions 11 are formed (step S505), and working with the pattern mold 10. Injecting the ultraviolet curable resin between the plate (step S510), Passing the injected ultraviolet curable resin between the pattern mold 10 and the working plate (step S515), S505 to S510 Coating an ultraviolet curable resin on the upper part of the auxiliary mold 20 manufactured through the step (S520), and providing a release film 3 on the ultraviolet curable resin, and then irradiating and curing ultraviolet rays (S525). Is made of.

First, as shown in FIG. 17A, the pattern mold 10 on which the plurality of protrusions 11 are formed is spaced apart from the work plate 1 on the work plate 1, and at this time, the work plate 1 is rotated. UV curable resin is injected between and the pattern mold 10.

One side of the ultraviolet curable resin is formed in the same shape as the plurality of prism portions 155 by the plurality of protrusions 1 formed on the pattern mold 10 while passing between the working plate 1 and the pattern mold 10.

Thus, the ultraviolet curable resin passed between the work plate 1 and the pattern mold 10 is cured to produce an auxiliary mold 20 for forming the refractive plate 150.

Next, as shown in FIG. 17B, the UV curable resin is again coated on the auxiliary mold 20, the release film 3 is provided on the UV curable resin, and irradiated with UV light to cure the UV curable resin. Let's do it.

In this case, the ultraviolet curable resin is generally semi-cured, but may be completely cured.

The release film 3 has the effect of flattening the surface provided with the release film 3 when the ultraviolet curable resin coated on the auxiliary mold 20 is cured.

In addition, since the release film 3 is coated with a release material for preventing the resin from sticking to the adhesive, the adhesive film remains on the surface on which the release film was provided when the release film 3 was removed even when the UV curable resin was completely cured. The effect can be obtained.

When the diffusion plate 130a and the refracting plate 150 are completed through the above process, the diffusion plate 130 and the refracting plate 150 are adhered to each other to be integrated.

The process of integrating the diffusing plate 130 and the refracting plate 150 is diffused on the surface from which the release film 3 of the completed refracting plate 150 is removed on the auxiliary mold 20, as shown in FIG. 10. After the plate 130a is provided, it may be completely cured by irradiation with ultraviolet rays, or may be adhered by pressing.

Thereafter, the integrated diffusion plate 130a and the refracting plate 150 are separated from the auxiliary mold 20, wherein the adhesive force between the diffusion plate 130a and the refracting plate 150 is reduced to the refracting plate 150 and the auxiliary mold 20. It is superior to the adhesive force between) so that the refractive plate 150 can be easily separated from the auxiliary mold 20.

After the diffusion plate 130a and the refracting plate 150 are integrated, the light guide plate 110 or the base plate is prepared. In the present invention, the light guide plate 110 is prepared as shown in the drawing.

Then, the diffusion plate 130a and the refractive plate 150 integrated with the prepared light guide plate 110 are adhered to each other.

When the optical member is manufactured by adhering the diffusion plate 130a and the refractive plate 150 integrated with the light guide plate 110, the optical member is adhered by adhering the diffusion plate 130a and the refractive plate 150 integrated with the base plate. There is an advantage that the thickness of the optical member is manufactured thinner than when manufacturing.

Meanwhile, when manufacturing the optical member, the diffusion plate and the refraction plate may manufacture the optical member having various structures by applying the aforementioned various embodiments.

The optical member according to the present invention has adhesiveness in both the diffusion plate and the refracting plate, and is made of an ultraviolet curable resin that can transmit light, and the effect of being integrated by adhesiveness can be obtained.

Therefore, the handling of the diffusion plate and the refraction plate is easy, and the PET is not used between the diffusion plate and the refraction plate to increase the luminance to prevent the light leakage phenomenon of the liquid crystal display panel and to extend the viewing angle.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

110: light guide plate 115: lamp
130a: diffusion plate
131: first adhesive surface 133: second adhesive surface
135: diffusion
150: refractive plate 151: first side
155: Prism part

Claims (16)

In the optical member,
A plurality of prismatic parts formed on the upper side and having at least one refractive plate; And
A diffusion plate provided below the refracting plate and having a plurality of diffusion parts formed on at least one of an upper side and a lower side to diffuse light;
The refractive plate and the diffusion plate is formed of a resin having an adhesive or adhesive,
The refractive plate and the diffusion plate are integrally formed;
When the refractive plate is provided with a plurality, the optical member is provided with the plurality of prismatic crosses. The method of claim 1,
The resin is an optical member consisting of at least one of ultraviolet curable resin, infrared curable resin and thermosetting resin. The method of claim 1,
The refractive plate has a higher refractive index than the diffusion plate. The method of claim 1,
The diffusion plate has a plurality of diffusion portions are formed on any one of the upper side and the lower side, the optical member is formed with a plurality of diffusion holes on the other side of the upper side and the lower side. The method of claim 1,
The diffusion plate is provided with the plurality of diffusion parts on at least one surface, the optical member is provided with two diffusion plates are adhered to any one surface of the diffusion plate facing each other. The method of claim 5, wherein
The optical member further comprises a sub-plate for handling between the two diffusion plates. The method according to claim 6,
The sub plate is an optical member made of any one of polyethylene terephthalate (PET), polycarbonate (PC) and polyethylene (PE). The method of claim 1,
The plurality of diffusion parts are formed concave. The method of claim 1,
The optical member further comprises a light guide plate or a base plate below the diffusion plate. The method of claim 9,
The light guide plate further includes a lamp,
The lamp is provided with at least one of a cold cathode fluorescent lamp (CCFL), a light emitting diode (LED) and an organic electroluminescence (EL). In the optical member manufacturing method,
A) manufacturing a diffusion plate having a plurality of diffusions formed on at least one side;
B) manufacturing a refractive plate formed with a plurality of prisms on the upper side; And
C) adhering and integrating the diffusion plate and the refracting plate,
The diffusion plate and the refractive plate is made of a resin having an adhesive,
Step B) is
B-1) rotating the pattern mold formed with a plurality of protrusions corresponding to the plurality of prism portion;
B-2) injecting ultraviolet curable resin between the rotating pattern mold and the working plate; And
B-3) the injected UV curable resin passes between the rotating pattern pattern and the working plate;
B-4) coating an ultraviolet curable resin on top of the auxiliary mold using the ultraviolet curable resin passed between the pattern mold and the working plate as an auxiliary mold; And
B-5) an optical member manufacturing method comprising the step of providing a release film on the upper side of the ultraviolet curable resin and irradiating with ultraviolet rays to cure. The method of claim 11,
After step C),
D) preparing a light guide plate or base plate; And
E) further comprising the step of adhering the integrated diffusion plate and the refracting plate with the light guide plate or the base plate. The method of claim 11,
Step A) is
A-1) coating a UV curable resin on a mold formed to correspond to the plurality of diffusions;
A-2) semi-curing the ultraviolet curable resin by irradiating the ultraviolet curable transparent resin with ultraviolet rays; And
A-3) The optical member manufacturing method comprising the step of separating the semi-cured ultraviolet curable resin from the mold. The method of claim 13,
And a plurality of protrusions corresponding to the plurality of diffusions are formed at one side of the mold. delete The method of claim 11,
One side of the refractive plate is an optical member manufacturing method that is formed flat by the release film.

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