KR100997956B1 - One-body light guide panel and fabricating method thereof - Google Patents

Abstract

PURPOSE: An one-body light guide panel and a fabricating method thereof are provided to prevent a scratch which is generated in the space between components. CONSTITUTION: A light guide layer(112) has an optical pattern on a front side and a back side and makes the incident light from a light source diffused over an entire region. A first support layer(118) is laminated on the front side of the light guide layer through a high transmittance adhesive layer. An optical pattern is formed on the front side. A reflective layer(102) is laminated on the bottom of the light guide layer and reflects the light from the back side of the light guide layer to the direction of the light guide layer. A second support layer(106) is arranged between the light guiding layer and the reflective layer and is laminated on the back side of the light guide layer through the adhesive layer.

Description

Integrated light guide plate and manufacturing method thereof {ONE-BODY LIGHT GUIDE PANEL AND FABRICATING METHOD THEREOF}

The present invention relates to a light guide plate of a liquid crystal display device, and more particularly, to an integrated light guide plate capable of reducing the thickness of a backlight unit and a method of manufacturing the same.

In general, the liquid crystal display device has a trend that the application range is gradually widened due to the characteristics such as light weight, thin, low power consumption. In accordance with this trend, liquid crystal displays are used in various electronic devices such as office automation equipment, audio / video equipment, and the like.

Such a liquid crystal display device displays a desired image on the screen by adjusting the transmission amount of the light beam according to a signal applied to a plurality of control switches arranged in a matrix form, and is not a self-luminous display device. A separate light source is needed.

The backlight unit includes a direct type and an edge type according to the position of the light source. The direct backlight unit arranges a plurality of light sources directly below the liquid crystal display panel, and irradiates the liquid crystal display panel with light incident from the light sources through the diffusion plate and the plurality of optical sheets. On the other hand, the edge type backlight unit is configured to install a light source at the edge of the liquid crystal display device, and irradiate the liquid crystal display panel with light incident from the light source through the light guide plate and the plurality of optical sheets. Since the thickness is thinner than that of the direct type, it is widely used in electronic devices requiring thinning.

1 is a view showing a laminated structure of a light guide plate 4 and an optical sheet applied to a conventional edge type backlight unit.

Referring to FIG. 1, a plurality of optical sheets are disposed based on the light guide plate 4.

First, the light guide plate 4 converts light incident from a light source (or lamp) into surface light, and is uniformly distributed over the entire area of the light guide plate 4, and the reflecting plate 2 is disposed below the light guide plate 4 so that the light guide plate ( Reflect the light emitted to the back of 4).

On the other hand, the optical sheets include at least one diffusion sheet 6 and at least one prism sheet 8, 10. Such optical sheets scatter light incident from the light guide plate 4 so that the light is evenly distributed over the entire surface of the liquid crystal display panel. In addition, the optical sheets may refractor the scattered light to increase the surface brightness, and diffuse the light to widen the viewing angle.

Since the light guide plate 4 and the optical sheets are manufactured separately, the light guide plate 4 and the optical sheets are transported for assembling the liquid crystal display, and are sequentially stacked below the liquid crystal display panel as shown in FIG. 1.

Specifically, since the light guide plate 4 and each optical sheet are separate components, they are stacked at predetermined intervals, respectively.

In addition, when the thickness of the light guide plate 4 or the optical sheets is thinly manufactured, there is a problem that deformation occurs due to heat or external factors from the light source of the backlight unit. Thick manufacturing trend.

Accordingly, in the related art, the thickness of the backlight unit is thick, so that the liquid crystal display is generally thick, and the manufacturing process is complicated because the light guide plate and each optical sheet must be manufactured and transported separately and then laminated again. There is also a problem that the manufacturing cost is also high.

Furthermore, due to the laminated structure, since a predetermined distance is provided between the light guide plate and the respective sheets, friction occurs between the components due to pressure from the outside, so that there is a problem that scratches occur in the frictional portion.

In order to overcome the above problems, it is an object of the present invention to provide an integrated light guide plate and a method of manufacturing the same that can reduce the thickness of the backlight unit.

In addition, another object of the present invention is to provide an integrated light guide plate and a method of manufacturing the same, which can simplify the manufacturing process of the backlight unit and reduce the manufacturing cost.

In addition, another object of the present invention is to provide an integrated light guide plate capable of preventing scratches generated between the components of the backlight unit and a manufacturing method thereof.

In order to achieve the above object, the integrated light guide plate according to an embodiment of the present invention is formed with an optical pattern on at least one surface of the front and rear, the light guide layer to uniformly distribute the light incident from the light source to the entire area; A first support layer laminated on a front surface of the light guide layer through a high permeable adhesive layer applied to a rear surface, and having an optical pattern formed on the front surface thereof; A reflective layer laminated on the lower part of the light guide layer to reflect light emitted to the rear surface of the light guide layer toward the light guide layer; And a material disposed between the light guide layer and the reflective layer, laminated on the back surface of the light guide layer through a high permeable adhesive layer applied to the front surface, and laminated on the front surface of the reflective layer through a high permeable adhesive layer applied on the back surface. 2 and a support layer, wherein the first and second support layers are formed to a thickness of 50 ~ 188㎛, the reflective layer is formed to a thickness of 100 ~ 250㎛, the adhesive layer is a uniform front surface to a thickness of 10 ~ 100㎛ Applied or partially applied.

The optical pattern is formed by any one of a printing method, a V-cutting method, a laser scan method, and an imprinting method.

The optical pattern is a light collecting pattern or a diffusion pattern.

According to another embodiment of the present invention, an integrated light guide plate includes a light guide layer in which an optical film layer is laminated on at least one of a front surface and a rear surface thereof to uniformly distribute light incident from a light source to an entire area; A reflective layer laminated on the lower part of the light guide layer to reflect light emitted to the rear surface of the light guide layer toward the light guide layer; And a support layer disposed between the light guide layer and the reflective layer, laminated on the back surface of the light guide layer through a high permeable adhesive layer applied to the front surface, and laminated on the front surface of the reflective layer through a high permeable adhesive layer applied on the back surface. It includes, The optical film layer includes a light collecting pattern or a diffusion pattern, The optical film layer and the support layer is formed to a thickness of 50 ~ 188㎛, The reflective layer is formed to a thickness of 100 ~ 250㎛, The pressure-sensitive adhesive layer is uniformly coated or partially coated with a thickness of 10 to 100 µm.

The optical film layer is laminated on at least one of a front surface and a rear surface of the light guide layer through a highly transparent adhesive layer.

The integrated light guide plate further includes at least one additional optical film layer laminated on the front surface of the light guide layer through a high permeable adhesive layer applied to a rear surface thereof.

The optical film layer is laminated on the front surface of the light guide layer, and the integrated light guide plate further includes at least one additional optical film layer laminated on the front surface of the optical film layer through a high-transmissive adhesive layer applied to the rear surface.

The pressure-sensitive adhesive layer is formed of a UV curing type pressure-sensitive adhesive.

Method of manufacturing an integrated light guide plate according to an embodiment of the present invention comprises the steps of forming an optical pattern on at least one surface of the front and back of the light guide layer; Applying a high permeability adhesive layer to the back side of the first support layer; Laminating the back surface of the first support layer to the entire surface of the light guide layer by using an adhesive layer applied to the back surface of the first support layer; Forming an optical pattern on an entire surface of the first support layer; Applying a high permeability adhesive layer to the front and back surfaces of the second support layer, respectively; And laminating the front surface of the second support layer to the back surface of the light guide layer by using an adhesive layer applied to the front surface of the second support layer, and using the adhesive layer applied to the back surface of the second support layer to reflect the second layer. And laminating to the back surface of the support layer, wherein the first and second support layers are formed to a thickness of 50 to 188 μm, the reflective layer is formed to a thickness of 100 to 250 μm, and the adhesive layer is 10 to 100 μm. To the thickness of the front is uniformly applied or partially applied.

The optical pattern is formed by any one of a printing method, a V-cutting method, a laser scan method, and an imprinting method.

Method of manufacturing an integrated light guide plate according to another embodiment of the present invention comprises the steps of laminating an optical film layer on at least one surface of the front and back of the light guide layer; Applying a high permeability adhesive layer to the front and back surfaces of the support layer, respectively; And laminating the entire surface of the support layer to the lower portion of the light guide layer by using the adhesive layer applied on the front surface of the support layer, and laminating the reflective layer on the back surface of the support layer by using the adhesive layer applied to the back surface of the support layer. It includes, the optical film layer and the support layer is formed to a thickness of 50 ~ 188㎛, the reflective layer is formed to a thickness of 100 ~ 250㎛, the adhesive layer is a uniform coating or part of the entire surface to a thickness of 10 ~ 100㎛ Is applied.

The step of laminating the optical film layer on at least one of the front side and the rear side of the light guide layer may include applying a high permeability adhesive layer on at least one of the front side and the rear side of the light guide layer; And laminating the optical film layer to the applied adhesive layer.

The front surface of the support layer is laminated to the back surface of the light guide layer.

The optical film layer is laminated on the rear surface of the light guide layer, and the front surface of the support layer is laminated on the rear surface of the optical film layer.

The method of manufacturing the integrated light guide plate may include applying a highly transparent adhesive layer to the rear surface of the additional optical film layer; And laminating a rear surface of the additional optical film layer to the front surface of the light guide layer using the applied adhesive layer.

The optical film layer is laminated on the front surface of the light guide layer, and the method of manufacturing the integrated light guide plate includes the steps of applying a highly transparent adhesive layer on the back of the additional optical film layer; And laminating the rear surface of the additional optical film layer to the front surface of the optical film layer using the applied adhesive layer.

The pressure-sensitive adhesive layer is formed of a UV curing type pressure-sensitive adhesive that is cured through UV irradiation.

According to the present invention, the reflective plate and the optical sheets are laminated on the light guide plate to be integrally formed, thereby reducing the overall thickness of the backlight unit.

In addition, according to the present invention, since the light guide plate is integrated with the optical sheet through a series of manufacturing processes, the manufacturing process is simplified and the manufacturing cost is also reduced.

In addition, according to the present invention, since the light guide plate and the optical sheets are integrally formed by sticking and laminating each other, there is an effect of preventing damage such as scratches caused by the spaces between the components as in the prior art.

1 is a view showing a laminated structure of a light guide plate and an optical sheet applied to a conventional edge type backlight unit;
2 is a cross-sectional view of an integrated light guide plate according to an embodiment of the present invention;
3 is a diagram illustrating a multilayer structure of a prism acid condensing pattern layer;
4A to 4G are views illustrating a method of manufacturing an integrated light guide plate according to one embodiment of the present invention;
5A to 5C are diagrams showing examples of adhesive layer coating shapes;
6 is a cross-sectional view of an integrated light guide plate according to another embodiment of the present invention; and
7A to 7I are views illustrating a method of manufacturing an integrated light guide plate according to another embodiment of the present invention.

Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 7I.

Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

2 is a cross-sectional view illustrating a laminated structure of an integrated light guide plate according to an embodiment of the present invention.

Referring to FIG. 2, the integrated light guide plate according to the exemplary embodiment may include a reflective layer 102, a third adhesive layer 104, a second support layer 106, a second adhesive layer 108, and a third optical pattern ( 110, the light guide layer 112, the first optical pattern 114, the first adhesive layer 116, the first support layer 118, and the second optical pattern 120 are sequentially stacked.

First, the reflective layer 102 is disposed at the lowermost portion of the integrated light guide plate to reflect light emitted from the light source and emitted to the rear surface of the light guide layer 112 from the light incident on the light guide layer 112. In other words, the reflective layer 102 is incident on the light guide layer 112 but is not emitted to the upper portion in the direction of the liquid crystal display panel. Minimize the role. Accordingly, the reflective layer 102 may be applied to any material as well as aluminum, as long as the material can reflect light.

The reflective layer 102 is laminated with the second support layer 106 through the third adhesive layer 104.

The second support layer 106 supports the entire surface of the reflective layer 102 and prevents the reflective layer 102 from being deformed. The second support layer 106 may be formed of a transparent material such as polyethylene terephthalate (PET) or polycarbonate (PC). .

The other side of the second support layer 106 is laminated with the light guide layer 112 through the second adhesive layer 108.

In this case, the light guide layer 112 may include a third optical pattern 110 and a first optical pattern 114 on the rear surface and the upper front surface facing the second support layer 106, respectively.

The optical pattern may be a light collecting pattern or a diffusion pattern. In the case of the light collecting pattern, the light path is focused on the front of the display surface by bending the light propagation path in a direction perpendicular to the display surface.In the case of the diffusion pattern, the luminance difference is increased in all areas of the display surface by scattering incident light. Do not let me.

The second support layer 106 described above simultaneously performs a role of separating the third optical pattern 110 and the reflective layer 102 formed on the rear surface of the light guide layer 112, and not only the reflective layer 102 but also the entire integrated light guide plate. By supporting the above, deformation such as warpage of the integrated light guide plate due to external factors and mutual deformation due to material differences between the attached light guide layer 112 and the reflective layer 102 are prevented.

On the other hand, the second support layer 106 is not an essential configuration, and when the second support layer 106 is not disposed, the third adhesive layer 104 and the second adhesive layer 108 in the laminated configuration of FIG. Of course, none of them are deleted together.

A light source is disposed on at least one side of the light guide layer 112, and the light guide layer 112 uniformly distributes the light incident from the light source in the entire region of the light guide layer 112. That is, the light guide layer 112 allows light incident from the light source to be uniformly incident on the liquid crystal display panel.

Although the back surface of the light guide layer 112 is illustrated as an example in FIG. 2, various shapes and modifications are possible, such as forming the back surface obliquely to increase the function of the light guide layer 112.

The front surface of the light guide layer 112 on which the first optical pattern 114 is formed is laminated with the first support layer 118 through the first adhesive layer 116.

Like the second support layer 106, the first support layer 118 is formed of a transparent material, and a second optical pattern 120 is formed on the entire surface of the first support layer 118.

As described above, the optical patterns 110, 114, and 120 may be formed as a condensing pattern or a diffusion pattern, and in FIG. 2, three optical patterns 110, 114, and 120 are formed. In the present invention, at least one optical pattern may be formed.

In an embodiment, when only the third optical pattern 110 is to be disposed, the first optical pattern 114, the first adhesive layer 116, the first support layer 118, and the second optical pattern 120 may be formed. The configuration can be omitted.

Meanwhile, in another embodiment, when only the first and third optical patterns 114 and 110 are to be disposed, the first adhesive layer 116, the first support layer 118, and the second optical pattern 120 may be configured. May be omitted.

In another embodiment, when only the first optical pattern 114 is to be disposed, the third optical pattern 110, the first adhesive layer 116, the first support layer 118, and the second optical pattern 120 are disposed. The configuration of may be omitted.

That is, in the present invention, all three optical patterns 110, 114, and 120 do not necessarily have to be formed as shown in FIG. 2, but at least one condensing pattern and at least one It is preferable to include a diffusion pattern.

The light converging pattern may be any shape as long as it has a light converging effect such as a prism acid shape or a lenticular shape. The light diffusing pattern may be any shape as long as it has a light diffusing effect such as a bead shape.

3 is a diagram illustrating an example in which a light collecting pattern of a prism acid shape is configured in a multilayer.

In the case of Figure 3, in order to maximize the light collection effect, it is preferable to arrange so that the longitudinal direction of the prism acid perpendicular to each other.

Meanwhile, although not shown in the drawings, at least one layer configuration may be further added to the top of the integrated LGP to improve the performance of the backlight unit, such as a brightness enhancement layer.

4A to 4G are views illustrating a process of manufacturing an integrated light guide plate according to one embodiment of the present invention, and specifically, a method of manufacturing the integrated light guide plate shown in FIG. 2.

First, referring to FIG. 4A, a first optical pattern 114 is formed on the light guide layer 112.

Here, the first optical pattern 114 is formed on the surface of the light guide layer 112 by a printing method, a V-cutting method, a laser scan method, or an imprinting method.

The printing method is a method in which a special ink is applied to the surface of the light guide layer 112 in a pattern form by using a mask having a predetermined pattern, and the V-cutting method is a V-shaped scratch on the surface of the light guide layer 112. Forming a pattern to form a pattern, the laser scanning method is a method of forming a pattern on the light guide layer 112 by irradiating a laser.

Meanwhile, in the imprinting method, a resin is coated on the surface of the light guide layer 112, a stamper composed of a mold or a soft mold is laminated on the coated resin to cure the resin, and then the stamper is removed again. This is a method of forming a pattern.

That is, an optical pattern is completed by forming a stamper shape such as an intaglio or an embossed pattern in the resin.

In this case, the resin may be a UV curing resin using acrylic, silicone, or the like, or a thermosetting resin using acrylic, silicone, epoxy, or the like. In the case of using a UV curing resin, a UV curing method is used to cure the resin after stamper lamination, and a thermal curing method is used when a thermosetting resin is used.

In the imprinting method, the light diffusion effect can be increased by directly injecting beads or the like into the resin.

Next, as shown in FIG. 4B, a first adhesive layer 116 is coated on the first support layer 118.

Here, the thickness of the second support layer 106, which will be described later, including the first support layer 118, is preferably formed to a thickness of 50 ~ 188㎛ to maintain the support performance to a minimum thickness.

The first adhesive layer 116 is formed of a high-transmissive optical pressure-sensitive adhesive material such as acryl-based so as not to interfere with the path of the light, it is preferably formed of a heat-resistant material to withstand the heat generated from the light source.

In one embodiment, the first adhesive layer 116 may be formed of a general adhesive or a UV curing type adhesive.

The first adhesive layer 116 is uniformly applied to the entire surface of the first support layer 118 as shown in FIG. 5A or partially only at the outer portion on the first support layer 118 as shown in FIGS. 5B and 5C. It may be applied or partially applied in the form of a mesh.

When the first adhesive layer 116 is partially coated as shown in FIGS. 5B and 5C, an air layer is formed between the layers on which the first adhesive layer 116 is not applied, thereby causing a refractive effect due to the first adhesive layer 116. Attenuation can be prevented.

The first adhesive layer 116 is preferably formed to a thickness of 10 ~ 100㎛ to minimize the overall thickness while maintaining the adhesive tension.

On the other hand, a release paper for adsorbing foreign matters may be attached on the first adhesive layer 116 before the next lamination.

The configuration and shape of the first adhesive layer 116 can be similarly applied to the second and third adhesive layers 108 and 104 formed thereafter.

The light guide layer 112 and the first support layer 118 prepared through this process are laminated through the first adhesive layer 116 as shown in FIG. 4C.

In the case where the release paper is attached to the first adhesive layer 116, the release paper removing process should be accompanied before the process of FIG. 4C.

In this case, when the first adhesive layer 116 is of the UV curing type, the light guide layer 112 and the first support layer 118 are laminated with the first adhesive layer 116 interposed therebetween, and then irradiated with UV to cure. The process proceeds, and the same is true in the second and third adhesive layer (108, 104) forming step to be carried out later.

Next, as shown in FIG. 4D, a second optical pattern 120 is formed on the entire surface of the first support layer 118 laminated with the light guide layer 112, and a third optical surface is formed on the rear surface of the light guide layer 112. The pattern 110 is formed.

Here, the second and third optical patterns 120 and 110 are formed through the same process as the above-described first optical pattern 114, and in the case of forming the third optical pattern 110, another structure is formed on the rear surface thereof. This may be done in any process before this is added.

Meanwhile, as shown in FIG. 4E, a second support layer 106 coated with a second adhesive layer 108 and a third adhesive layer 104 is provided on the front and back surfaces thereof, respectively, and the second adhesive layer 108 is provided. As shown in FIG. 4F, the second support layer 106 and the configuration of FIG. 4D are laminated.

Finally, as shown in FIG. 4G, the reflective layer 102 is laminated to the second support layer 106 through the third adhesive layer 104, thereby completing an integrated light guide plate according to an exemplary embodiment.

Reflective layer 102 is preferably formed to a thickness of 100 ~ 250㎛ in order to reduce the overall thickness while maintaining the reflection performance.

Thereafter, if necessary, a separate layer may be additionally configured on the top of the integrated light guide plate through an adhesive layer to improve the performance of the backlight unit.

4A to 4G illustrate the manufacturing method according to the configuration of the integrated light guide plate shown in FIG. 2, but as described above, when there is a configuration omitted from the integrated light guide plate of FIG. The step is also omitted.

6 is a cross-sectional view illustrating a laminated structure of an integrated light guide plate according to another exemplary embodiment of the present invention.

Referring to FIG. 6, an integrated light guide plate according to another embodiment of the present invention may include a reflective layer 202, a fifth adhesive layer 205, a support layer 206, a fourth adhesive layer 208, and a third optical film layer 210. ), The third adhesive layer 211, the light guide layer 212, the first adhesive layer 213, the first optical film layer 214, the second adhesive layer 216, and the second optical film layer 220. This is laminated | stacked sequentially.

Accordingly, the configuration and shape of the adhesive layers 204, 208, 211, 213, and 216, as well as the reflective layer 202, the support layer 206, and the light guide layer 212 illustrated in the embodiment of FIG. 6, are illustrated in FIG. 2. Since the same as described through the example, a detailed description thereof will be omitted.

In another embodiment of the present disclosure, the first front film and the bottom back surface of the light guide layer 212 may be formed by the first optical film layer 214 and the first adhesive layer 213 and the third adhesive layer 211, respectively. The third optical film layer 210 is laminated.

The optical film is a film including a light collecting pattern or a diffusion pattern, and is formed of a transparent material such as PET or PC so that light can pass therethrough.

As described in the embodiment of the present invention, the support layer 206 does not necessarily need to be disposed, and in this case, any one of the fourth adhesive layer 208 and the fifth adhesive layer 204 may be deleted. Do.

The entire surface of the light guide layer 212 on which the first optical film layer 214 is formed is laminated with the second optical film layer 220 through the second adhesive layer 216.

As described above, the optical film layers 210, 212, and 220 are configured to have a light converging pattern or a diffusion pattern, and in FIG. 6, three optical film layers 210, 212, and 220 are disposed. In the present invention, at least one optical film layer may be disposed.

In one embodiment, when only the third optical film layer 210 is to be disposed, the first adhesive layer 213, the first optical film layer 214, the second adhesive layer 216, and the second optical film layer The configuration of 220 can be omitted.

In another embodiment, when only the first and third optical film layers 214 and 210 are to be disposed, the configuration of the second adhesive layer 216 and the second optical film layer 220 may be omitted.

In another embodiment, when only the first optical film layer 214 is to be disposed, the configuration of the third optical film layer 210, the second adhesive layer 216, and the second optical film layer 220 are omitted. Can be.

That is, in the present invention, all three optical film layers 210, 212, and 220 do not necessarily need to be arranged as shown in FIG. It is preferable to include one diffusion film layer.

In addition, although not shown in the drawings, in another embodiment of the present invention, at least one additional layer configuration may be added to the top of the integrated LGP to improve the performance of the backlight unit, such as a brightness enhancement layer. Can be.

7A to 7I are views illustrating a process of manufacturing an integrated light guide plate according to another embodiment of the present invention, and specifically, a method of manufacturing the integrated light guide plate shown in FIG. 6.

First, referring to FIG. 7A, a first adhesive layer 213 is coated on the light guide layer 212.

In addition to the first adhesive layer 213, all the adhesive layers of the integrated light guide plate according to another embodiment of the present invention are also applied to the adhesive layer characteristics as described in the embodiment of the present invention.

Subsequently, the first optical film layer 214 is laminated on the first adhesive layer 213 as shown in FIG. 7B, and the second adhesion on the first optical film layer 214 as shown in FIG. 7C. Layer 213 is applied.

On the second adhesive layer 213, the second optical film layer 220 is laminated as shown in FIG. 7D, thereby completing the upper part of the integrated light guide plate.

Next, as illustrated in FIG. 7E, a third adhesive layer 211 is applied to the rear surface of the light guide layer 212, and a third optical film is disposed on the rear surface of the third adhesive layer 211 as illustrated in FIG. 7F. Layer 210 is laminated.

Here, the optical film layers 214, 220, 210 are preferably formed to a thickness of 50 ~ 188㎛ to maintain the function of condensing or diffusion to a minimum thickness.

Meanwhile, as illustrated in FIG. 7G, a support layer 206 coated with a fourth adhesive layer 208 and a fifth adhesive layer 204 is provided on the front and rear surfaces thereof, respectively, and is illustrated through the fourth adhesive layer 208. As shown in 7h, the support layer 206 and the configuration up to FIG. 7f are laminated.

Finally, as shown in FIG. 7I, the reflective layer 202 is laminated to the support layer 206 through the fifth adhesive layer 204 to complete the integrated light guide plate according to the exemplary embodiment.

Thereafter, if necessary, a separate layer may be additionally configured on the top of the integrated light guide plate through an adhesive layer to improve the performance of the backlight unit.

7A to 7I, the manufacturing method of the integrated light guide plate illustrated in FIG. 6 has been described. However, when there is a configuration omitted from the integrated light guide plate of FIG. The step is also omitted.

The integrated light guide plate of the present invention as described above may be applied to not only a liquid crystal display device but also a backlight unit of various display devices requiring a backlight, and may be applied to a backlight unit for illumination in addition to the display device.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

2: reflector 4: light guide plate
6: diffuser plate 8, 10: prism sheet
102, 202: reflective layer
104, 108, 116, 204, 208, 211, 213, 216: adhesive layer
106, 118, 206: support layer 110, 114, 120: optical pattern
112, 212: light guide layer 210, 214, 216: optical film layer

Claims (17)

An optical pattern formed on at least one of a front surface and a rear surface of the light guide layer to uniformly distribute the light incident from the light source to the entire area;
A first support layer laminated on a front surface of the light guide layer through a high permeable adhesive layer applied to a rear surface, and having an optical pattern formed on the front surface thereof;
A reflective layer laminated on the lower part of the light guide layer to reflect light emitted to the rear surface of the light guide layer toward the light guide layer; And
A second layer disposed between the light guide layer and the reflective layer, laminated on the back surface of the light guide layer through a high permeable adhesive layer applied to the front surface, and laminated on the front surface of the reflective layer through a high permeable adhesive layer applied to the rear surface; Support layer
Including,
The first and second support layer is formed to a thickness of 50 ~ 188㎛,
The reflective layer is formed to a thickness of 100 ~ 250㎛,
The pressure-sensitive adhesive layer is an integrated light guide plate, characterized in that the entire uniform coating or partial coating to a thickness of 10 ~ 100㎛.
The method of claim 1,
And the optical pattern is formed by any one of a printing method, a V-cutting method, a laser scanning method, and an imprinting method.
The method of claim 1,
And the optical pattern is a light collecting pattern or a diffusion pattern.
An optical film layer laminated on at least one of a front surface and a back surface to uniformly distribute the light incident from the light source to the entire region;
A reflective layer laminated on the lower part of the light guide layer to reflect light emitted to the rear surface of the light guide layer toward the light guide layer; And
A support layer disposed between the light guide layer and the reflective layer, laminated on the back surface of the light guide layer through a high permeable adhesive layer applied to the front surface, and laminated on the front side of the reflective layer through a high permeable adhesive layer applied on the back surface;
Including,
The optical film layer includes a light collecting pattern or a diffusion pattern,
The optical film layer and the support layer is formed to a thickness of 50 ~ 188㎛,
The reflective layer is formed to a thickness of 100 ~ 250㎛,
The pressure-sensitive adhesive layer is an integrated light guide plate, characterized in that the entire uniform coating or partial coating to a thickness of 10 ~ 100㎛.
The method of claim 4, wherein
And the optical film layer is laminated on at least one of a front surface and a rear surface of the light guide layer through a highly transparent adhesive layer.
The method of claim 4, wherein
An integrated light guide plate further comprising at least one additional optical film layer laminated on the front surface of the light guide layer through a high permeable adhesive layer applied to the rear surface.
The method of claim 4, wherein
The optical film layer is laminated on the front surface of the light guide layer,
The integrated light guide plate further comprises at least one additional optical film layer laminated on the front surface of the optical film layer through a high permeable adhesive layer applied to the back.
The method according to any one of claims 1 to 7,
The pressure-sensitive adhesive layer is an integral light guide plate, characterized in that formed with a UV curing adhesive.
Forming an optical pattern on at least one of a front surface and a rear surface of the light guide layer;
Applying a high permeability adhesive layer to the back side of the first support layer;
Laminating the back surface of the first support layer to the entire surface of the light guide layer by using an adhesive layer applied to the back surface of the first support layer;
Forming an optical pattern on an entire surface of the first support layer;
Applying a high permeability adhesive layer to the front and back surfaces of the second support layer, respectively; And
The front surface of the second support layer is laminated on the back surface of the light guide layer by using an adhesive layer applied on the front surface of the second support layer, and the reflective layer is coated on the back surface of the second support layer by the second support layer. Step of laminating to the back of the
Including,
The first and second support layer is formed to a thickness of 50 ~ 188㎛,
The reflective layer is formed to a thickness of 100 ~ 250㎛,
The pressure-sensitive adhesive layer is a method of manufacturing an integrated light guide plate, characterized in that the front uniform coating or partial coating to a thickness of 10 ~ 100㎛.
10. The method of claim 9,
The optical pattern is a method of manufacturing an integrated light guide plate, characterized in that formed by any one of a printing method, V-cutting method, laser scanning method, and imprinting method.
Laminating an optical film layer on at least one of a front side and a back side of the light guide layer;
Applying a high permeability adhesive layer to the front and back surfaces of the support layer, respectively; And
Laminating the entire surface of the support layer to the lower portion of the light guide layer using the adhesive layer applied to the entire surface of the support layer, and laminating the reflective layer to the back surface of the support layer using the adhesive layer applied to the back surface of the support layer.
Including,
The optical film layer and the support layer is formed to a thickness of 50 ~ 188㎛,
The reflective layer is formed to a thickness of 100 ~ 250㎛,
The pressure-sensitive adhesive layer is a method of manufacturing an integrated light guide plate, characterized in that the front uniform coating or partial coating to a thickness of 10 ~ 100㎛.
The method of claim 11,
The step of laminating the optical film layer on at least one of the front surface and the rear surface of the light guide layer,
Applying a high permeability adhesive layer to at least one of a front surface and a rear surface of the light guide layer; And
Laminating the optical film layer to the coated adhesive layer
Method of manufacturing an integrated light guide plate comprising a.
The method of claim 11,
And a front surface of the support layer is laminated on the rear surface of the light guide layer.
The method of claim 11,
The optical film layer is laminated on the back surface of the light guide layer,
The front surface of the support layer is laminated to the back surface of the optical film layer manufacturing method of the integrated light guide plate.
The method of claim 11,
Applying a high permeability adhesive layer to the back side of the additional optical film layer; And
Laminating the back surface of the additional optical film layer to the front surface of the light guide layer using the applied adhesive layer;
Method of manufacturing an integrated light guide plate further comprising.
The method of claim 11,
The optical film layer is laminated on the front surface of the light guide layer,
Applying a high permeability adhesive layer to the back side of the additional optical film layer; And
Laminating the back surface of the additional optical film layer to the front surface of the optical film layer by using the applied adhesive layer
Method of manufacturing an integrated light guide plate further comprising.
The method according to any one of claims 9 to 16,
The pressure-sensitive adhesive layer is a method of manufacturing an integrated light guide plate, characterized in that formed with a UV curing type pressure-sensitive adhesive that is cured by UV irradiation.

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