KR101130169B1 - Methode of manufacturing light guide plate and the light guide plate - Google Patents

Methode of manufacturing light guide plate and the light guide plate Download PDF

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Publication number
KR101130169B1
KR101130169B1 KR1020110021648A KR20110021648A KR101130169B1 KR 101130169 B1 KR101130169 B1 KR 101130169B1 KR 1020110021648 A KR1020110021648 A KR 1020110021648A KR 20110021648 A KR20110021648 A KR 20110021648A KR 101130169 B1 KR101130169 B1 KR 101130169B1
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KR
South Korea
Prior art keywords
guide plate
light guide
incident
light
planarization layer
Prior art date
Application number
KR1020110021648A
Other languages
Korean (ko)
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KR20110103344A (en
Inventor
박철
Original Assignee
박철
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Publication date
Priority to KR1020100022187 priority Critical
Priority to KR20100022187 priority
Application filed by 박철 filed Critical 박철
Priority claimed from PCT/KR2011/001707 external-priority patent/WO2011112032A2/en
Publication of KR20110103344A publication Critical patent/KR20110103344A/en
Application granted granted Critical
Publication of KR101130169B1 publication Critical patent/KR101130169B1/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065Manufacturing aspects; Material aspects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00663Production of light guides
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055Reflecting element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side

Abstract

A method of manufacturing a light guide plate that provides a movement path of light incident from the outside may include applying a liquid leveling agent to the incident surface of the light guide plate body to which light is incident, and curing the liquid leveling agent to the incident surface of the light guide plate body. Forming a planarization layer.

Description

Light guide plate manufacturing method and light guide plate {METHODE OF MANUFACTURING LIGHT GUIDE PLATE AND THE LIGHT GUIDE PLATE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a light guide plate and a light guide plate, and more particularly, to a method for manufacturing a light guide plate having excellent light transmission efficiency and a light guide plate.

Recently, flat panel displays such as a liquid crystal display, a plasma display panel, and an organic light emitting diode are used in place of a cathode ray tube. Among the flat panel display devices described above, the liquid crystal display device includes a liquid crystal panel constituting a screen and a backlight unit for supplying light to the liquid crystal panel because it cannot generate light by itself. The light source unit of the backlight unit uses a line light source such as a lamp or a point light source such as a light emitting diode, and the point light source may be mounted on a substrate.

1 is an exploded perspective view of a general liquid crystal display device.

Referring to FIG. 1, a general liquid crystal display device 1 includes a liquid crystal panel 10 and a backlight unit 40. The liquid crystal panel 10 does not emit light by itself and receives light from the backlight unit 40 disposed behind the liquid crystal panel 10.

In more detail, the liquid crystal display device 1 includes a liquid crystal panel 10 for forming an image, a driver 20 for driving the liquid crystal panel 10, and a mold frame 30 for supporting the sides of the liquid crystal panel 10. The back cover unit 40, which supplies light to the rear surface of the liquid crystal panel 10, the lower cover 50 which accommodates the backlight unit 40, and the lower cover 50 are mutually coupled to the front surface of the liquid crystal panel 10. It includes a top cover 60 for covering.

The liquid crystal panel 10 is a liquid crystal injected between the thin film transistor substrate 11, the color filter substrate 12 disposed on the thin film transistor substrate 11, the thin film transistor substrate 11 and the color filter substrate 12. Include. The liquid crystal panel 10 is arranged in a matrix form of the liquid crystal cells forming a pixel unit, and forms an image by adjusting the light transmittance of the liquid crystal cells according to the image signal information transmitted from the driver 20.

The mold frame 30 is formed along the side of the liquid crystal panel 10, has a substantially rectangular shape, and supports the liquid crystal panel 10 spaced apart from the backlight unit 40.

The backlight unit 40 is positioned behind the liquid crystal panel 10 and includes an optical member 41, a light guide plate 45, a light source 46, and a reflective sheet 47.

The optical member 41 is positioned on the rear surface of the liquid crystal panel 10 and includes a diffusion sheet 42, a prism sheet 43, and a protective sheet 44. The diffusion sheet 42 serves to diffuse the light from the light source unit 46 and supply the light to the liquid crystal panel 10. The prism sheet 43 collects light diffused from the diffusion sheet 42 in a direction perpendicular to the plane of the upper liquid crystal panel 10. The light passing through the prism sheet 43 proceeds almost vertically to provide a uniform luminance distribution. The protective sheet 44 protects the prism sheet 43 which is weak to scratches.

The light guide plate 45 which guides light to the back surface of the prism sheet 43 is disposed on the back surface of the prism sheet 43. The light guide plate 45 is disposed behind the liquid crystal panel 10, and evenly distributes the light supplied from the light source unit 46 toward the liquid crystal panel 10. The light source unit 46 is disposed on any one side of the light guide plate 45 provided in a substantially rectangular plate shape to supply light toward the light guide plate 45. The light source unit 46 includes a light emitting diode and a light emitting diode substrate on which the light emitting diode is mounted.

On the other hand, the light of the light source unit 46 incident through the side of the light guide plate 45 may not enter the light guide plate 45 completely when the side of the light guide plate 45 is not smooth, which may reduce the brightness of the liquid crystal panel. Can cause it.

The present invention provides a method of manufacturing a light guide plate having excellent light transmission efficiency and a light guide plate. In particular, the present invention provides a light guide plate and a method of manufacturing a light guide plate through which external light can be introduced without loss.

The present invention provides a light guide plate manufacturing method and a light guide plate capable of preventing light loss to the outside is reflected light without scattering even in the light guide plate.

According to an exemplary embodiment of the present invention, a method of manufacturing a light guide plate for controlling a movement path of light incident from the outside may include applying a liquid leveling agent to an incident surface of a light guide plate body, and curing the liquid leveling agent. Forming a planarization layer on an incident surface of the light guide plate body.

The light guide plate body may be made of a transparent substrate, for example, an acrylic resin, and the planarizing agent provided on the incident surface of the light guide plate body may use an ultraviolet curing agent or a thermal curing agent. Preferably, after the planarizing agent is cured, the planarizing agent may be provided as a material having light properties similar to the light guide plate body, such as light transmittance, light absorptivity, and light refractive index. The light guide plate body having an optically transparent incidence surface by the planarization layer can prevent light scattering or diffusion from occurring on the incidence surface, maintain a constant refractive index or reflectance of the incoming light, and provide light without loss. Can be introduced into.

In general, in the manufacturing process of the light guide plate body, fine indentations are formed on the incident surface by polishing or cutting, and the fine indentations may cause scattering of incident light. For example, the light guide plate body may be provided by cutting the light guide plate or through injection molding. In this manufacturing process, the surface of the light guide plate body may not be smooth. Specifically, when the light guide plate is cut to a size corresponding to the light guide plate body to provide the light guide plate body, minute unevenness may be formed on the polished surface of the light guide plate body. In addition, in the case of providing the light guide plate body through injection molding through a mold, unevenness may be formed in the light guide plate body in response to an incident hole of the mold for injecting the raw material of the light guide plate body into the mold. As described above, when the outer surface of the light guide plate main body on which the unevenness is formed is formed on the incident surface adjacent to the light source unit providing light, the unevenness formed on the outer surface of the light guide plate may induce diffused reflection of light incident from the outside.

The planarization layer may be formed on other side surfaces other than the incident surface, which functions together with the reflective layer to prevent light scattering from occurring on the reflective surface. The liquid leveling agent may be cured to form a planarization layer on the other side of the light guide plate body instead of the incident surface. A reflective layer may be provided on the planarization layer to allow true mirror reflection to occur.

The surface of the planarization layer can be formed in the shape of a lens to assist light condensing or refraction, and a reflection layer can be formed in the space between the light sources even in the incident surface under a condition that minimizes the influence on the light source. have.

According to an exemplary embodiment of the present invention, the light guide plate for controlling the movement path of the light incident from the outside includes a planarization layer formed on the incident surface of the light guide plate body, the planarization layer is applied to the liquid leveling agent on the incident surface It is characterized by being provided by curing.

The method of manufacturing the light guide plate and the light guide plate of the present invention are excellent in light transmission efficiency, in particular, by providing a flattening layer on the incident surface of the light guide plate main body to have a smooth surface by the flattening layer, thereby refraction of the light flowing through the incident surface In addition, the reflectance can be constant, and the diffuse reflection of light on the incident surface can be reduced, so that the light can be introduced into the inside without loss of light.

The method of manufacturing the light guide plate and the light guide plate of the present invention are introduced into the light guide plate with little loss of light from the light source, so that the power efficiency is excellent, and light loss is small when the light is introduced into the light guide plate, which is advantageous for the enlargement of the liquid crystal panel.

1 is an exploded perspective view of a general liquid crystal display device.
2 and 3 are views for explaining a light guide plate manufacturing method according to an embodiment of the present invention.
4 is a cross-sectional view for comparing the before and after forming the planarization layer on the incident surface of the light guide plate body.
5 is a cross-sectional view for describing a light guide plate according to an exemplary embodiment of the present invention.
6 to 8 are views for explaining the manufacturing process of the light guide plate of FIG.
9 is a perspective view illustrating a light guide plate according to an exemplary embodiment of the present invention.
10 is a cross-sectional view for comparing the conventional reflective structure with the reflective structure in the light guide plate of this embodiment.
11 is a plan view illustrating a light guide plate according to an exemplary embodiment of the present invention.
12 is a plan view illustrating a light guide plate according to an exemplary embodiment of the present invention.
13 is a perspective view illustrating a light guide plate according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by quoting contents described in other drawings under such a rule, and the contents repeated or deemed apparent to those skilled in the art may be omitted.

2 and 3 are views for explaining a light guide plate manufacturing method according to an embodiment of the present invention, Figure 4 is a cross-sectional view for comparing before and after forming a planarization layer on the incident surface of the light guide plate body.

For reference, FIG. 2 may describe a manufacturing process of the light guide plate body, and FIG. 3 may describe a process of applying and curing the planarizing agent on the light guide plate body.

2 to 4, the light guide plate 100 includes a light guide plate body 110 and a planarization layer 120. The light guide plate body 110 is provided by cutting the plate-shaped light guide plate 101 to a size corresponding to the light guide plate body 110. For example, a light guide plate body that can be used for a large-size liquid crystal display device of 42 inches or more may be provided by cutting one or two light guide plates in general. In this embodiment, as shown in FIG. The light guide plate body 110 formed by cutting two pieces 101 may be used as a component of the liquid crystal display device. In some cases, the light guide plate may be cut to the size of the light guide plate body having a desired size. For example, the light guide plate may be cut to have an arrangement of 2 * 2, 2 * 3, etc., to provide a larger number of light guide plate bodies. .

The cutting of the light guide plate main body 110 may use a general cutting tool, laser cutting, or diamond cutting. As can be seen from the enlarged part of FIG. 2, unevenness remains on the cutting surface 112 of the light guide plate main body 110. Such unevenness may be removed through a separate polishing process, but even fine grinding may not completely block scattering of light because fine unevenness remains.

Therefore, in the present invention, a separate planarization layer 120 may be formed on the cutting surface 112 on which the unevenness is formed so that the light guide plate 100 may have an optically transparent surface. Since it is possible to virtually eliminate the separate polishing process for removing the unevenness of the cutting surface 112 or to reduce the burden on the polishing process.

The light guide plate body 110 may be slidably moved between the support portions 103 while the light guide plate body 110 is supported by both surfaces of the light guide plate body 110 using the support portion 103. In this case, a coating apparatus, for example, an inkjet 104 is disposed on the cutting surface 112 of the light guide plate body 110 corresponding to the incident surface of the light guide plate 100, and the cutting surface 112 is disposed through the ink jet 104. Apply a leveling agent to the phase. Thereafter, the planarizing agent applied on the cutting surface 112 may be cured by irradiating the planarizing agent with ultraviolet rays through the ultraviolet ray emitter 105 which may irradiate ultraviolet rays again. The inkjet 104 may apply a flattening agent, which is a transparent resin, in a fine droplet state, so that the applied flattening agent may have a smooth surface. Similar to the method of applying the leveling agent using the inkjet 104, it is also possible to apply the leveling agent to the cut surface by any one of spraying, silkscreen printing, and dispensing.

After applying the planarizer, the planarization process may be further performed by using a film or a roller to further planarize the layer formed of the planarizer. Although the roller may directly contact the cutting surface 112 to which the flattening agent is applied, the film may pass through the second planarization process as the film passes between the roller and the cutting surface 112.

Referring to FIG. 4, the left side is a cross section of the light guide plate body 110 before the planarization layer 120 is formed on the basis of the reference line L, and the right side is a planarization layer on the cutting surface 112 of the light guide plate body 110. It is a cross section of the light guide plate 100 after 120 is provided.

As shown in FIG. 4, the cutting surface 112 of the light guide plate body 110 may be cut at a portion A, so that the light guide plate 101 may be cut to a size corresponding to the light guide plate 100. When provided, fine irregularities are formed on the cutting surface 112 of the light guide plate body 110, and the irregularities may induce diffused reflection of light incident from the outside. On the other hand, as can be seen in the portion B, the planarization layer 120 is formed on the cutting surface 112 of the light guide plate body 110 according to the present invention, the light incident through the planarization layer 120 is smooth surface Diffuse reflection is minimized.

Here, the planarization layer 120 may be formed by applying a transparent liquid leveling agent to the cutting surface 112 through a general coating or spraying process in addition to the inkjet printing method, and curing the same. Can be used. As described above, the applied planarizing agent is provided with a material having light properties such as light transmittance, light absorption rate, and light refractive index similar to that of the light guide plate body 110 after curing by exposure to ultraviolet rays or heat. Therefore, the light guide plate 100 having a smooth light incident surface by the planarization layer 120 may maintain a constant refractive index or reflectance of light flowing through the incident surface, and may be a planarization layer having a smooth surface on the cutting surface 112. Light incident through the 120 may be diffused into the light guide plate 100 by minimizing diffuse reflection on the incident surface of the planarization layer 120 disposed on the cutting surface 112.

5 is a cross-sectional view for describing a light guide plate according to an embodiment of the present invention, and FIGS. 6 to 8 are views for explaining a manufacturing process of the light guide plate of FIG. 5.

Referring to FIG. 5, the light guide plate 200 may have a different thickness as it moves away from the light source unit 230 that provides light to the light guide plate 200. The light guide plate 200 described above may be provided through injection molding using a mold since the thickness of the light guide plate 200 is not easy to use the light guide plate as in the previous embodiment.

As shown in FIG. 6, the upper mold 205 and the lower mold 203 are stacked and disposed, and the liquid resin for the light guide plate body 210 is introduced through the entrance hole 204 and cured thereto. The light guide plate body 210 may be provided as shown in FIG. Meanwhile, the portion 214 protruding by the incident hole 204 may be cut as shown in FIG. 8, and the unevenness is formed on a surface on which the protruding portion 214 is cut. Such unevenness may induce diffuse reflection of light incident from the light source unit 230 disposed on the side of the light guide plate body 210.

However, the light guide plate 200 according to the present invention forms a planarization layer 220 on the incident surface 212 of the light guide plate body 210, thereby making the refractive index or reflectance of the light incident through the incident surface 212 constant. The diffuse reflection of light on the incident surface 212 can be reduced. Accordingly, the light transmission efficiency is excellent from the light source unit 230 to the inside of the light guide plate body 210, and the light flowing from the light source is introduced into the light guide plate with a small loss, thereby providing excellent power efficiency and less light loss introduced into the light guide plate. The panel can be enlarged. For reference, after the protruding portion 214 is removed, the above-described planarization layer 220 may be formed after the process of polishing the surface from which the protruding portion 214 is cut off, and in fact, the planarizing layer 120 may be formed. In this embodiment, since the light guide plate 200 has a smooth incident surface, a separate polishing process may be omitted.

9 is a perspective view illustrating a light guide plate according to an exemplary embodiment of the present invention, and FIG. 10 is a cross-sectional view for comparing a conventional reflective structure with a reflective structure in the light guide plate of the present embodiment.

9 and 10, the light guide plate includes a light guide plate body 310, a planarization layer 320 formed on four surfaces, and a reflective layer 330 formed on three other surfaces except the incident surface.

The light guide plate body 310 may be provided in a rectangular thin plate shape and may be formed by cutting the light guide plate or by a separate injection process. An incident surface is provided corresponding to the position of the light source 50 in the light guide plate. The incident surface and the other three surfaces are provided with the transparent planarization layer 320 using the UV curing agent, and the reflective layer 330 is provided on the surfaces of the other three surfaces except the incident surface.

By forming a separate flattening layer 320 on the cut surface on which the unevenness is formed, the light guide plate may have an optically transparent surface. In the present invention, since the separate flattening layer 320 is provided, the unevenness of the cut surface is virtually eliminated. A separate polishing process may be omitted or the burden on the polishing process may be reduced.

As can be seen by comparing the A-A 'cross-section and the B-B' cross-section, the reflective layer 330 is formed on the surface of the other side except the incident surface, the reflective layer 330 is mirror printing or metal deposition, film adhesion It may be formed through, and the like, in addition to this may be provided with a variety of methods for other mirror processing. For example, contacting the metal housing to the outer surface of the planarization layer 320 may be broadly understood as one of forming the reflective layer 330.

At the incident surface, light may be introduced through the planarization layer 320 without scattering or diffuse reflection, and the overall efficiency of the light may be improved by 5 to 10%. In addition, it is possible to prevent diffuse reflection or scattering of light on the reflective surface.

Referring to FIG. 10A, it can be seen that the reflective film 30 is directly attached to the light guide plate body 10 having fine unevenness. Light reflected from the inside of the light guide plate body 10 through total reflection may be primarily scattered by fine unevenness of the side surface, and may be reflected by the reflective film 30 as it is, and may be secondarily scattered by fine unevenness. have. Through this, the angle of incidence of light in the light guide plate body may be close to the vertical, and these lights may be forced to flow out.

However, as shown in (b), when the planarization layer 320 and the reflective layer 330 are formed on the side to be reflected, scattering due to fine unevenness can be suppressed as much as possible on the side to be reflected. Light reflected from the inside of the LGP body 310 through total reflection may pass through the boundary of the side body 310 and the planarization layer 320 without scattering, and may be reflected from the reflective layer 330 and pass through the boundary without scattering again. There is a number.

The reflected light without loss of light may be scattered in the scattering pattern intended by the light guide plate 310, and may improve overall brightness of the liquid crystal display.

11 is a plan view illustrating a light guide plate according to an exemplary embodiment of the present invention.

Referring to FIG. 11, the light guide plate includes a light guide plate body 410, a planarization layer 420 formed on four surfaces, and a reflective layer 430 intermittently formed between the planarization layer 420.

The light guide plate body 410 is provided in a rectangular thin plate shape, and may be formed by cutting the light guide plate or by a separate injection process. In the LGP, the light sources 50 may be provided to face each other at both sides of the LGP body 410, and the incident surfaces may be provided at opposite sides.

The transparent planarization layer 420 using the UV curing agent may be provided on the incident surface on both sides and the other two surfaces, and the reflective layer 430 on the surface of the planarization layer 420 without disturbing the light propagation from the light source 50. ) May be provided.

By forming a separate flattening layer 420 on the cut surface on which the unevenness is formed, the light guide plate may have an optically transparent surface. In the present invention, since the separate flattening layer 420 is provided, the unevenness of the cut surface is virtually eliminated. A separate polishing process may be omitted or the burden on the polishing process may be reduced.

Since light may also be emitted from the incident surface, the reflective layer 430 may be formed on the other side except the incident surface, and the reflective layer 430 may be discontinuously corresponding to the space between the light sources 50 even on the incident surface. It can be formed. Accordingly, the reflective layer 430 may minimize the loss of light that may leak to the outside even at the incident surface.

12 is a plan view illustrating a light guide plate according to an exemplary embodiment of the present invention.

Referring to FIG. 12, the light guide plate includes a light guide plate body 510 and a planarization pattern 520 formed on an incident surface.

The light guide plate body 510 may be provided in a rectangular thin plate shape and may be formed by cutting the light guide plate or through a separate injection process. In the LGP, the light source 50 may be provided to correspond to the incident surface of the LGP body 510.

However, the planarization pattern 520 may not be formed on the entire incident surface, but may be partially formed corresponding to the position of the light source 50. The planarization pattern 520 may be provided in a partially separated form by intermittently spraying and curing the planarizing agent.

An optically transparent surface may be formed only on a portion where the flattening pattern 520 is formed on the cut surface on which the unevenness is formed, and in fact, a separate polishing process for removing the unevenness of the cut surface may be omitted or the burden on the polishing process may be reduced. have.

13 is a perspective view illustrating a light guide plate according to an embodiment of the present invention.

Referring to FIG. 13, the light guide plate includes a light guide plate body 610 and a planarization layer 620 formed on an incident surface.

The light guide plate body 610 may be provided in a rectangular thin plate shape, and may be formed by cutting the light guide plate or through a separate injection process. In the LGP, the light source may be provided to correspond to the incident surface of the LGP body 610.

However, the planarization layer 620 may be formed in whole or in part on the incident surface, and the surface of the planarization layer 620 is curved to have lens characteristics. The planarization layer 620 may be optically transparent on the incident surface on which the uneven surface is formed, and may form a surface for condensing or redirecting.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

100: Light guide plate 110: Light guide plate body
112: cutting surface 120: leveling layer

Claims (17)

  1. In the manufacturing method of the light guide plate for controlling the movement path of the light incident from the outside,
    Applying a liquid leveling agent to the incident surface of the light guide plate body; And
    Curing the liquid leveling agent to form a planarization layer on an incident surface of the light guide plate body;
    Method of manufacturing a light guide plate comprising a.
  2. The method of claim 1,
    The planarizer is a method of manufacturing a light guide plate, characterized in that it comprises an ultraviolet curing agent or a thermal curing agent.
  3. The method of claim 1,
    The planarization layer is a manufacturing method of the light guide plate, characterized in that provided with a material having the optical characteristics of the light guide plate.
  4. The method of claim 1,
    The light guide plate body is provided by cutting a light guide plate for the light guide plate body to a size corresponding to the light guide plate body, wherein the liquid leveling agent is applied to the polished or unpolished cutting surface of the light guide plate body formed by cutting Method for manufacturing a light guide plate characterized in that.
  5. The method of claim 1,
    Applying a liquid leveling agent to at least one side of the light guide plate body other than the incident surface to form the planarization layer on at least two side surfaces of the light guide plate body, the planarization formed on the side of the planarization layer other than the incident surface A method of manufacturing a light guide plate, wherein a reflective layer is formed on the layer.
  6. The method of claim 5,
    The reflective layer is a light guide plate manufacturing method, characterized in that provided through the mirror surface treatment of deposition, printing, or film adhesion.
  7. The method of claim 1,
    The light guide plate body is provided using an injection,
    Concavities and convexities are formed in correspondence with incident holes of the mold into which the raw material of the light guide plate body is injected into the mold for injection.
    And the planarizing agent is provided on a polished or unpolished surface of the light guide plate body corresponding to the incident hole.
  8. The method of claim 1,
    The liquid leveling agent is a method of manufacturing a light guide plate, characterized in that formed by ink jet, spray, silkscreen printing or dispensing (dispensing).
  9. The method of claim 1,
    And forming a bend on the surface of the planarization layer to have lens characteristics.
  10. In the light guide plate for controlling the movement path of light incident from the outside,
    And a planarization layer formed on an incident surface of the light guide plate body, wherein the planarization layer is provided by applying and curing a liquid leveling agent on the incident surface.
  11. The method of claim 10,
    The planarizing agent includes a light guide plate comprising an ultraviolet curing agent or a thermal curing agent.
  12. The method of claim 10,
    And a reflecting layer formed on the planarization layer formed on at least one side surface of the light guide plate body other than the incident surface.
  13. The method of claim 12,
    The reflective layer is provided through a mirror surface treatment of deposition, printing, or film adhesion.
  14. The method of claim 10,
    The flattening layer is formed on all or part of the incident surface corresponding to the position of the light source.
  15. The method of claim 10,
    A light guide plate, characterized in that the reflective layer is formed corresponding to the position between the light source in the planarization layer on the incident surface.
  16. 16. The method of claim 15,
    The incidence surface is formed on two or more side surfaces of the light guide plate body.
  17. The method of claim 10,
    The light guide plate, characterized in that the curved surface is formed so that the planarization layer has a lens characteristic.
KR1020110021648A 2010-03-12 2011-03-11 Methode of manufacturing light guide plate and the light guide plate KR101130169B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020100022187 2010-03-12
KR20100022187 2010-03-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/001707 WO2011112032A2 (en) 2010-03-12 2011-03-11 Method for manufacturing a light guide plate, and light guide plate

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KR20110103344A KR20110103344A (en) 2011-09-20
KR101130169B1 true KR101130169B1 (en) 2012-03-28

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KR101299734B1 (en) * 2012-04-25 2013-08-26 티에스티아이이엔지 주식회사 Apparatus and method for processing a serration pattern
KR101240358B1 (en) * 2012-08-27 2013-03-11 레이젠 주식회사 Light guide plate producting method having light scattering scratch line
KR102093335B1 (en) * 2013-03-12 2020-03-26 삼성디스플레이 주식회사 Coating device, method of manufacturing display substrate using the same and display substrate manufactured using the same

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JP2004082437A (en) 2002-08-26 2004-03-18 Meiki Co Ltd Apparatus for molding light guiding plate and method for molding light guiding plate
JP2006133801A (en) 2006-01-10 2006-05-25 Enplas Corp Light guide plate for face light source device, face light source device, and liquid crystal display
KR20060096198A (en) * 2005-03-03 2006-09-11 태산엘시디 주식회사 Producing method of light guide plate using uv curing method
JP2007213035A (en) 2005-01-31 2007-08-23 Toppan Printing Co Ltd Optical sheet, and backlight unit and display using same

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JP2004082437A (en) 2002-08-26 2004-03-18 Meiki Co Ltd Apparatus for molding light guiding plate and method for molding light guiding plate
JP2007213035A (en) 2005-01-31 2007-08-23 Toppan Printing Co Ltd Optical sheet, and backlight unit and display using same
KR20060096198A (en) * 2005-03-03 2006-09-11 태산엘시디 주식회사 Producing method of light guide plate using uv curing method
JP2006133801A (en) 2006-01-10 2006-05-25 Enplas Corp Light guide plate for face light source device, face light source device, and liquid crystal display

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