KR101040028B1 - Light guide panel of flat panel display manufactoring system and manufactoring method therefor - Google Patents

Abstract

PURPOSE: A light guide plate manufacturing system of a flat panel display device and manufacturing method thereof are provided to simplify the manufacturing process of a light guide plate and to minimize the secession of unhardened photocurable resin layer. CONSTITUTION: A transparent substrate(10) receives external light. A mask(20) has a groove and is installed in the front side of the transparent substrate. A fixing device arranges the mask on the transparent substrate. A photocurable resin application device forms a photocurable resin layer that spreads a photocurable resin on the groove of the mask. A stamper(40) has an optical pattern in order to form a light guide pattern. A lamp(50) is installed in the rear side of the transparent substrate.

Description

LIGHT GUIDE PANEL OF FLAT PANEL DISPLAY MANUFACTORING SYSTEM AND MANUFACTORING METHOD THEREFOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate manufacturing system and a manufacturing method of a flat panel display device, and more particularly, to a system and method for simplifying a manufacturing process of a large-area thin film light guide plate.

Among the flat panel display devices, the plasma display panel or the EL element emits light by itself to serve as a display device. However, since the liquid crystal display device uses a function of a liquid crystal substrate that blocks or transmits light, a separate light source is required. . Therefore, the liquid crystal display device is provided with a separate light distribution device in addition to the liquid crystal substrate.

As shown in FIG. 1, the light distribution apparatus has a structure in which the reflective sheet 11, the light guide plate 12, the diffusion sheet 13, the first and second prism sheets 14 and 15 are sequentially stacked, and the light guide plate ( The lamp 21 is provided in the side surface of 12, and the lamp housing 22 which surrounds the lamp 21 and the light guide plate side surface is comprised.

In addition, a panel of the display device is provided on the upper surface of the second prism sheet 15 to form a flat panel display device. If the display device developer manufactures the liquid crystal table market value using the light distribution device, the liquid crystal panel may be provided on the upper surface of the second prism sheet 15. However, in order to prevent damage to the prism sheet, it is preferable that the protective sheet 16 be provided between the second prism sheet 15 and the liquid crystal substrate.

The reflective sheet 11 is installed on the bottom of the light guide plate 12 to reflect all the light incident through the light guide plate 12 to the upper surface of the light guide plate 12, the light guide plate 12 is incident from the outside or by the lamp housing 22 Diffusion dots (12 ″ in FIG. 2C) are formed on the bottom of the substrate to scatter the reflected light, such as barium oxide or titanium oxide. That is, the diffusion dot formed on the bottom surface of the light guide plate scatters the light incident on the light guide plate so that more light is emitted to the top surface of the light guide plate.

As a method of forming the diffusion dot on the light guide plate, a screen printing method which is commonly used in a general patterning process is used.

The operation principle of the light distribution apparatus configured as described above is as follows.

When the fluorescent lamp 21 provided at one end surface of the light guide plate 12 emits light, the light generated by the fluorescent lamp 21 is reflected by the lamp housing 22 so that most of the light is incident on one side of the light guide plate 12. do. Since the material of the light guide plate 12 is transparent, light of the fluorescent lamp 21 incident through one side of the light guide plate 12 is transmitted to the other side of the light guide plate 12 by total reflection occurring at the top and bottom surfaces of the light guide plate 12. do.

Since light has a property of diffusing due to its inherent wave property, some of the light incident on the light guide plate 12 may propagate to the top and bottom surfaces of the light guide plate 12. Light propagated to the bottom surface of the light guide plate 12 is reflected by the reflection sheet 11 attached to the bottom surface of the light guide plate 12 and is emitted to the top surface of the light guide plate 12.

At this time, the light incident on the light guide plate 12 is scattered by the diffusion dot 12 ″ and proceeds to the upper surface of the light guide plate 12 and the other side of the light guide plate 12. As a result, most of the light incident through one side of the light guide plate 12 proceeds to the top surface of the light guide plate 12 by the reflective sheet 11 and the diffusion dot 12 ″ and is emitted.

Light emitted to the upper surface of the light guide plate 12 is uniformly spread by the diffusion sheet 13, and most of the light evenly spread is perpendicular to the upper surface of the light guide plate 12 by the first and second prism sheets 14 and 15. It proceeds by refraction in the direction.

A flat panel display device such as a liquid crystal display device displays an image using light traveling in a vertical direction of the upper surface of the light guide plate 12 through the above-described process.

However, since the diffusion dot formed in the light guide plate of the light distribution device according to the conventional technique is manufactured by the screen printing method, the pattern of the mask and the pattern of the diffusion dot actually formed by the pattern may be different. That is, an error occurs between the pattern of the mask and the pattern of the diffusion dot actually printed.

In addition, the size of the diffusion dot manufactured by the screen printing method is composed of an opaque material of at least several hundred micrometers (㎛) to reduce the light utilization efficiency of the light guide plate and the light emitted to the emitting surface of the light guide plate is uneven. . In addition, as shown in FIG. 2, the central angle of the light emitted through the light guide plate is very large, about 70 to 80 °, as compared to the vertical direction of one surface of the light guide plate, thereby lowering the luminance at the front surface. In order to correct the problem, there is a problem in that at least one prism sheet having a high unit price must be used. In addition, a diffusion sheet must be added to equalize uneven light.

In addition, since the diffusion dot 12 '' formed in the conventional light guide plate is made of an opaque material, as shown in FIG. 2, a part of the light incident through the reflective sheet 11 is diffused into the dot 12 ''. Blocked by). As a result, a considerable amount of light emitted from the lamp 21 is lost, so that the luminance of the light distribution apparatus provided with the conventional light guide plate is lowered.

In addition, the injection-type light guide plate has a problem that it is difficult to precisely control the structure of the unevenness (12 '' ') formed on the surface and the manufacturing process is complicated.

However, the conventional light guide plate manufacturing method using a corrosion method, a printing method, etc. other than the injection-type light guide plate is difficult to form a fine light guide pattern, which is why the shape of the light guide pattern is reflected on the screen so that the transparent substrate has a thickness of 4 mm or less. There was this impossible problem.

Therefore, a manufacturing system for a large-area thin film type light guide plate having a simple manufacturing process and easily forming a photocurable resin layer having the same area as the light guide pattern and preventing the spread of the photocurable resin layer occurring at the outermost surface of the light guide pattern. And method needed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is composed of an optically transparent material and having an external light incident thereon, and having a predetermined sized groove on the front surface of the transparent substrate. Photocurable resin application apparatus which forms the mask provided, the fixing apparatus which arrange | positions the groove | channel of the said mask on the said transparent substrate, and the photocurable resin layer which apply | coats photocurable resin to the groove | channel of the said mask arrange | positioned by the said fixing apparatus. And a stamper having an optical pattern having a predetermined shape on one surface thereof so as to form a light guide pattern on the surface of the coated photocurable resin layer in succession simultaneously with the application of the photocurable resin layer, and provided on the rear surface of the transparent substrate. The photocurable water is continuously installed at the same time as the formation of the light guide pattern with the light scanned in the transmission housing. Providing a light guide plate manufacturing system of a flat panel display device including a lamp for curing a layer to form a light guide pattern on the surface of the photocurable resin layer by a stamper continuously and simultaneously with the application of the photocurable resin to the entire surface of the transparent substrate; Simultaneously with the formation of the light guide pattern, the photocurable resin layer having the light guide pattern is cured by exposing the back surface of the transparent substrate.

The present invention has been made to solve the above problems, and another object of the present invention is to provide a mask having a predetermined size groove on the front surface of the optical transparent substrate on the transparent substrate, and in the groove of the mask Applying the photocurable resin to form a photocurable resin layer, and simultaneously applying the photocurable resin layer to the surface of the photocurable resin layer by adhesion of a stamper having a predetermined optical pattern on one surface thereof. Forming a light guiding pattern, curing the photocurable resin layer on which the light guiding pattern is formed through the exposure of a lamp while forming the light guiding pattern, and completing the formation of the light guiding pattern on the surface of the photocurable resin layer A light guide plate manufacturing method of a flat panel display device comprising the step of separating the stamper to provide a view on the front surface of the transparent substrate A photocurable pattern is formed on the surface of the photocurable resin layer by the stamper continuously at the same time as the application of the resin, and simultaneously with the formation of the lightguide pattern, the photocurable resin layer on which the lightguide pattern is formed is exposed to the backside of the transparent substrate. It becomes hard.

A light guide plate manufacturing system of a flat panel display device according to an aspect of the present invention for achieving the above object,

A transparent substrate composed of an optically transparent material and receiving external light;

A mask having a groove having a predetermined predetermined size and installed on a front surface of the transparent substrate,

A fixing device for arranging the groove of the mask on the transparent substrate;

A photocurable resin coating device for forming a photocurable resin layer for applying a photocurable resin to a groove of the mask arranged by the fixing device;

A stamper having an optical pattern having a predetermined shape on one surface to form a light guiding pattern on the surface of the coated photocurable resin layer in succession simultaneously with the application of the photocurable resin layer;

And a lamp installed on the rear surface of the transparent substrate and installed in the light transmitting housing and continuously curing the photocurable resin layer simultaneously with the formation of the light guide pattern with the scanned light.

The size of the groove of the mask is characterized in that it is provided to match the area of the light guide pattern.

Preferably, the stamper may be provided with a roller having a predetermined size having the optical pattern formed on the outer circumferential surface.

Preferably, the system may be provided with a flat plate-shaped stamp having a predetermined optical pattern formed on a cylindrical roller surface.

The system first cures the photocurable resin layer at the same time as the light guide pattern is formed on the surface of the photocurable resin layer by the stamper with the light of the lamp, and the photocurable water at the time of separation of the stamper after completion of the light guide pattern. Characterized in that it is provided so as to pass through the stratum second.

Technical problem according to another aspect of the present invention

Installing a mask having a predetermined size of a groove on the front surface of the optical transparent substrate on the transparent substrate;

Applying a photocurable resin to the groove of the mask to form a photocurable resin layer;

Forming a light guiding pattern on the surface of the photocurable resin layer continuously at the same time as the application of the photocurable resin layer by adhesion of a stamper having an optical pattern having a predetermined shape on one surface;

Curing the photocurable resin layer on which the light guide pattern is formed through the exposure of a lamp while continuously forming the light guide pattern; And

And separating the stamper after completion of the formation of the light guide pattern on the surface of the photocurable resin layer.

The method is characterized in that the roller-shaped stamper is provided in close contact with the predetermined direction to form the light guide pattern.

The method may form the light guide pattern while bringing a flat stamper having an optical pattern formed on the surface of a cylindrical roller in close contact with each other and transporting it in a predetermined direction.

The method comprises forming a light guide pattern on the surface of the photocurable resin layer and simultaneously exposing light to the back surface of the transparent substrate to first cure the photocurable resin layer formed on the light guide pattern, and to separate the stamper to the light guide. After the formation of the pattern is completed, the light is exposed to the back surface of the transparent substrate is characterized in that it is provided to secondary curing the photocurable resin layer formed on the light guide pattern.

The method is characterized in that it is provided to match a predetermined size of the groove of the mask to the area of the light guide pattern.

According to the light guide plate manufacturing system and manufacturing method of the flat panel display device according to the present invention, the light guide pattern is formed on the surface of the photocurable resin layer by the stamper continuously and simultaneously with the application of the photocurable resin on the entire surface of the transparent substrate, Since the photocurable resin layer on which the light guide pattern is formed is cured by exposing to the back surface of the transparent substrate simultaneously with the formation, the photocurable resin coating and the formation and curing of the light guide pattern are performed in one process. The process is simplified, minimizing foreign matter falling on the photocurable resin on the surface of the transparent substrate in the uncured state, and the application of the photocurable resin that matches the area of the light guide pattern using the groove of the mask is easy, The effect that can reduce the defective rate, such as the bleeding of a photocurable resin, is obtained in the outermost surface.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that illustrate preferred embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

First, Figure 3 is a view showing the configuration of a manufacturing system of a flat light guide plate according to an embodiment of the present invention, as shown in this, the flat light guide plate manufacturing system according to the present invention, the coating of the photocurable resin on the entire transparent substrate And continuously forming a light guiding pattern on the surface of the photocurable resin layer and simultaneously exposing the back surface of the transparent substrate to form the light guiding pattern to cure the photocurable resin layer on which the light guiding pattern is formed. The transparent substrate 10, the mask 20, the photocurable resin coating apparatus 30, the stamper 40, and the lamp 50 are provided.

Here, the transparent substrate 10 is made of an optically transparent material and is provided to receive light from the outside, the mask 20 has a groove of a predetermined predetermined size and is installed on the front of the transparent substrate 10 do.

The size of the groove 21 of the mask 20 is provided to match the area of the light guide pattern.

Here, in order to exactly match the position of the groove 21 of the mask 20 with the area of the light guide pattern, the system changes the groove 21 of the mask 20 to the light guide pattern of the transparent substrate 10. It may further include a fixing device (not shown) arranged in the position to form.

Further, the photocurable resin coating device 30 applies a photocurable resin to the groove 21 of the mask 20 arranged on the transparent substrate 10 by a fixing device to apply the photocurable resin layer 23 to the photocurable resin layer 23. It is provided to form.

The stamper 40 has an optical pattern having a predetermined shape on one surface to form the light guide pattern 25 on the surface of the applied photocurable resin layer 23 at the same time as the application of the photocurable resin layer 23. (41).

Here, as an example, the stamper 40 is provided in a roller shape in which an optical pattern 23 having a predetermined shape is formed on one surface thereof. Here, the roller of the stamp is provided in a circular shape having a diameter of a predetermined predetermined size.

In addition, it will be apparent to those skilled in the art that the system may include a stamp 40 having a predetermined optical pattern formed on a cylindrical roller surface in a flat plate shape.

In addition, the lamp 50 is provided on the rear surface of the transparent substrate 10 and is provided in the light transmitting housing so as to cure the photocurable resin layer 23 by exposure.

In this case, the lamp 50 is cured in the first step of the photocurable resin layer 23 in a continuous manner simultaneously with the formation of the light guide pattern 25 on the surface of the photocurable resin layer 23 by the stamper 40. After completion of the pattern 25, the photocurable resin layer 23 is exposed to secondary curing at the time of separation of the stamper 40.

On the other hand, according to the configuration of the present invention, the manufacturing process of the light guide plate according to the embodiment of the present invention to perform the application of the photocurable resin, the formation and exposure of the light guide pattern in one process.

First, the mask 20 is provided on the transparent substrate 10, and the photocurable resin is applied to the groove 21 of the mask 20 by moving the photocurable resin coating device 30 in a predetermined direction to thereby photocurable. The resin layer 23 is formed.

The stamper 40 is formed at the same time as the photocurable resin layer 23 and continuously adheres to the surface of the photocurable resin layer 23, and then the same as the conveyance direction of the photocurable resin layer coating device 30. Direction and thus the light guide pattern 25 is formed on the surface of the photocurable resin layer 23 by the optical pattern 41 of the stamper 40.

At this time, the light emitted from the lamp 50 on the rear surface of the transparent substrate 10 is continuously exposed to the light-transmitting housing at the same time as the light guide pattern is formed, and the photocurable resin layer 23 is first cured.

After the formation of the light guide pattern 25 is completed, the photocurable resin layer 23 is secondly cured by the light of the lamp 50 when the stamper 40 is removed.

In the flat panel display device manufactured by the manufacturing process as described above, the light emitted from the fluorescent lamp (not shown) is incident through the light incident surface of the light guide plate and guided away from the lamp along the light guide plate, followed by the photocurable resin layer. When the incident angle of the light incident on the light guide pattern 21 of (13) is smaller than the total reflection critical angle, the light is refracted and transmitted and reflected by the reflection sheet (not shown). Then, the light reflected by the reflective sheet is re-entered into the light guide plate to be guided along the light guide plate or emitted to the light exit surface.

The light guide pattern 25 serves to deflect the traveling direction of the light so that the path of the light is directed in the vertical direction of the light exit surface, and finally the exit angle of the light exiting the light exit plane is within a predetermined angle in the vertical direction. Condensing to be within the range of.

In addition, since the photocurable resin layer 23 is made of an optically transparent material, there is no light blocked or lost by the light guide pattern 25, so that the luminance of the photocurable resin layer 23 is improved by 50% or more.

According to the present invention, the light guide pattern is formed on the surface of the photocurable resin layer by the stamper continuously and simultaneously with the application of the photocurable resin to the entire surface of the transparent substrate, and simultaneously with the back surface of the transparent substrate continuously with the formation of the light guide pattern. As the photocurable resin layer on which the light guide pattern is formed by exposure is cured, application of the photocurable resin and formation and curing of the light guide pattern are performed in one step. Accordingly, the manufacturing process of the large-area thin film light guide plate is simplified, minimizing foreign matter falling on the photocurable resin on the surface of the transparent substrate in the uncured state, and the photocurable resin that matches the area of the light guide pattern using the groove of the mask. It is easy to apply and the defect rate such as bleeding of the photocurable resin on the outermost surface of the light guide pattern is reduced.

As such, those skilled in the art to which the present invention pertains may understand that the present invention may be embodied in other specific forms without changing to the technical concept or essential features of the present invention. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive. The scope of the invention is indicated by the following claims rather than the above description, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the invention. .

A photocurable pattern is formed on the surface of the photocurable resin layer continuously and simultaneously with the application of the photocurable resin on the entire surface of the transparent substrate. By curing, application of the photocurable resin, formation and curing of the light guide pattern are carried out in one process, which simplifies the manufacturing process of the large-area thin film light guide plate, and in the uncured state, foreign matter is deposited on the surface of the transparent substrate. It is easy to apply the photocurable resin that matches the area of the light guide pattern using the groove of the mask, and it is very effective in reducing the defective rate such as the spread of the photocurable resin on the outermost surface of the light guide pattern. It can bring great advances, and there is a good possibility of the market or sales of the flat panel display applied. Since the degree to which shall be explicitly carried in reality the invention there is industrial applicability.

1 is a view showing the configuration of a general light distribution apparatus.

2 is a view illustrating a process of emitting light in a conventional light distribution apparatus.

3 is a diagram illustrating a manufacturing system of a light guide plate according to the present invention.

<Explanation of symbols for main drawings>

10: transparent substrate 20: mask

21: groove 23: photo-curable resin layer

25 light guide pattern 30 photocurable resin layer

40: stamper 41: optical pattern

50: lamp

Claims (10)

A transparent substrate made of an optically transparent material and receiving external light; A mask having a groove having a predetermined predetermined size and installed on a front surface of the transparent substrate, A fixing device for arranging the groove of the mask on the transparent substrate on which the light guide pattern is to be formed; A photocurable resin coating device for forming a photocurable resin layer for applying a photocurable resin to a groove of the mask arranged by the fixing device; A stamper having an optical pattern having a predetermined shape on one surface to form a light guiding pattern on the surface of the coated photocurable resin layer in succession simultaneously with the application of the photocurable resin layer; The light guide plate of the flat panel display device, characterized in that it comprises a lamp which is provided on the back of the transparent substrate and installed in the housing for light transmission and the light is cured in succession simultaneously with the formation of the light guide pattern. Manufacturing system. The light guide plate manufacturing system of claim 1, wherein a size of a groove of the mask corresponds to an area of the light guide pattern. The light guide plate manufacturing system of claim 1, wherein the stamper comprises a roller having a predetermined size having the optical pattern formed on an outer circumferential surface thereof. The system of claim 1, wherein the system is A light guide plate manufacturing system of a flat panel display device, characterized in that a flat plate is provided with a stamp having a predetermined optical pattern formed on a cylindrical roller surface. The system of claim 1, wherein the system is Primary curing of the photocurable resin layer is carried out simultaneously with the formation of the light guide pattern on the surface of the photocurable resin layer by the stamper by the light of the lamp, And a second step of curing the photocurable resin layer at the time of separating the stamper after completion of the light guide pattern. Installing a mask having a predetermined size of a groove on the front surface of the optical transparent substrate on the transparent substrate; Applying a photocurable resin to the groove of the mask to form a photocurable resin layer; Forming a light guiding pattern on the surface of the photocurable resin layer continuously at the same time as the application of the photocurable resin layer by adhesion of a stamper having an optical pattern having a predetermined shape on one surface; Curing the photocurable resin layer on which the light guide pattern is formed through the exposure of a lamp while continuously forming the light guide pattern; And And separating the stamper after completion of formation of the light guide pattern on the surface of the photocurable resin layer. The method according to claim 6, wherein the method, A method of manufacturing a light guide plate of a flat panel display device, comprising: forming a light guide pattern by transferring a roller-shaped stamper in a predetermined direction. The method according to claim 6, wherein the method, And a flat stamper having the optical pattern formed on the surface of the cylindrical roller to be in close contact with each other to form the light guide pattern. The method according to claim 6, wherein the method, In the process of forming the light guiding pattern on the surface of the photocurable resin layer, the light is exposed on the back surface of the transparent substrate to cure the photocurable resin layer formed on the light guiding pattern continuously simultaneously with the formation of the light guiding pattern, After the formation of the light guide pattern by separating the stamper is completed, the light guide plate manufacturing method of the flat panel display device characterized in that it is provided to expose the light on the back surface of the transparent substrate to the secondary cured photocurable resin layer formed on the light guide pattern. . The method of claim 6, wherein the method And a predetermined size of a groove of the mask to match an area of the light guide pattern.

Images