KR20130025744A - Sheet for manufacturing light guide plate - Google Patents

Sheet for manufacturing light guide plate Download PDF

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Publication number
KR20130025744A
KR20130025744A KR1020110089247A KR20110089247A KR20130025744A KR 20130025744 A KR20130025744 A KR 20130025744A KR 1020110089247 A KR1020110089247 A KR 1020110089247A KR 20110089247 A KR20110089247 A KR 20110089247A KR 20130025744 A KR20130025744 A KR 20130025744A
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KR
South Korea
Prior art keywords
synthetic resin
sheet
light
guide plate
support sheet
Prior art date
Application number
KR1020110089247A
Other languages
Korean (ko)
Inventor
김정호
Original Assignee
(주)케이앤씨엘이디
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Application filed by (주)케이앤씨엘이디 filed Critical (주)케이앤씨엘이디
Priority to KR1020110089247A priority Critical patent/KR20130025744A/en
Publication of KR20130025744A publication Critical patent/KR20130025744A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means 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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)

Abstract

PURPOSE: A light guide plate manufacturing sheet including an adhering layer is provided to uniformly maintain the intensity of light emitted to a surface of a transparent plate by stably spreading the light from a support sheet to a transparent plate. CONSTITUTION: A light guide plate manufacturing sheet includes a support sheet(31), a diffusion layer(41), and an adhering layer(32). The support sheet refracts light emitted from a light source comprising transparent synthetic resin, opaque synthetic resin, or composed synthetic resin. The diffusion layer is formed as a v-shaped pattern on the support sheet and includes a plurality of diffusion beads which diffuse the refracted light to the transparent plate. The adhering layer is formed as the v-shaped pattern on the support sheet and adheres the diffusion layer to a rear surface of the transparent plate.

Description

Light guide plate manufacturing sheet {SHEET FOR MANUFACTURING LIGHT GUIDE PLATE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back light unit (BLU) applied to a liquid crystal display device, a general lighting device, or an advertisement lighting device. The present invention relates to a sheet for manufacturing a light guide plate which is attached and uniformly guides light sources incident from side and bottom surfaces upward.

In recent years, as the modern society enters the era of full-scale informatization, the display device field that visually expresses various electrical signal information has been rapidly developed, and in response to this, various kinds of flat panel display devices (FPD) have been developed. Has been introduced.

Examples of flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), field emission display devices (FEDs), and electroluminescent displays (Electro Luminescence Displays). Device, ELD), etc., which have excellent performances such as thinning, light weight, and low power consumption, are rapidly replacing the existing cathode ray tube (CRT).

Among such flat panel displays, liquid crystal displays are most actively used in fields such as notebooks, monitors, televisions, and portable terminals due to their excellent contrast ratio and high contrast ratio. Since the liquid crystal display device is a device for changing and displaying various electrical information generated by various devices by visual information using a change in the transmittance of the liquid crystal instead of a light emitting device, a separate light source is required.

Accordingly, a backlight unit having a light source is provided on the rear side of the liquid crystal display to irradiate light toward the front side of the liquid crystal panel, thereby realizing an image of distinguishable illuminance. In this case, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED) are used for the backlight unit as a light source for generating light. .

In general, the backlight unit is divided into a photometric method and a direct method according to the structure in which the light source is disposed. The former has a structure in which one or a pair of light sources are disposed on one side of the light guide plate, or two or two pairs of light sources. The light guide plate has a structure disposed on each of both side surfaces thereof. The latter direct method usually has a structure in which several light sources are disposed below the light guide plate.

1 is a view briefly illustrated to describe a general metering backlight unit.

Referring to FIG. 1, a general backlight unit 1 includes a reflective sheet 11, a light guide plate 12, a light source (cold cathode fluorescent lamp) 15, a diffusion sheet 13, and a prism sheet 14. The diffusion sheet 13 and the prism sheet 14 may be disposed at different positions depending on the configuration of the backlight unit 1.

Looking at the operating characteristics of the backlight unit 1, first, the light source incident on the light guide plate 12 from the lamp 15 is reflected from the reflecting dots (not shown) and each side of the light guide plate 12 is forward from the entire light guide plate 12 Will be emitted. As such, the light guide plate 12 acts as if it is a surface light source. The light source emitted forward from the light guide plate 12 is incident on the diffusion sheet 13 to be diffused, and is refracted by light rays having a distribution showing a peak in a substantially normal direction by a prism portion 14a formed on the surface of the prism sheet 14. After being emitted, it is emitted to the front liquid crystal panel (not shown).

Recently, in order to further improve illuminance, a liquid crystal display device has been developed and commercialized by using a light guide plate having a prism pattern shape on the front or rear surface of the light guide plate. One example is shown in FIG. 2 shows a backlight unit 2 according to the prior art.

Referring to FIG. 2, the backlight unit 2 according to the related art forms a light guide pattern 22a on the surface of the light guide plate 22, and the light source 25 on both sides (or one side) of the light guide plate 22. ), The diffusion sheet 23 is installed on the front surface of the light guide plate 22, and the reflective sheet 21 is installed on the rear surface of the light guide plate 22.

As shown in FIG. 2, the backlight unit 2 according to the related art forms a prism pattern, that is, a light induction pattern, on the light guide plate to improve the illuminance of the liquid crystal display. The light induction pattern 22a is a triangular (or V-shaped) three-dimensional pattern formed on the front or rear of the light guide plate 22 by an injection molding method, a laser processing method, or a machining method.

However, when the light guide pattern is formed on the light guide plate by using the processing method according to the related art, the following problems may occur. First, as the relatively expensive processing equipment is required, the initial investment cost for manufacturing the light guide plate is inevitably increased. Second, the injection molding method, laser processing method or machining methods are all difficult to secure the quality reliability of the product because the processing process is complicated.

As an example, a problem that may occur when the machining method is applied will be described.

First, the machining method uses a CNC (Coputerized Numerical Control) machine, in which case the light guide plate may be melted or deformed due to heat generated during the process. Accordingly, in order to apply the machining method, only polymethyl methacrylate (PMMA), which is heat resistant, that is, a material having heat resistance, may be used, and thus the materials to which the machining method may be applied are limited.

In addition, when the machining method is applied, foreign substances harmful to the human body such as dust may be generated during processing of the light guide plate due to the characteristics of the machining method, which may adversely affect the environment. In addition, due to the heat generated in the light guide plate processing process, the phenomena occur in the reflective sheet attached to the rear surface of the light guide plate, which may cause a dark phenomenon on the screen. In particular, as the size of the product increases, the dark phenomenon at the center of the light guide plate may be intensified.

In addition, when the machining method is applied, detailed process control is difficult due to the characteristics of the machining method, and thus there is a limit in controlling the depth, pitch, width, shape, and the like of the light induction pattern. For this reason, there is a limit in maximizing the efficiency when using various light sources.

In addition, in the case of applying the machining method, a CNC machining machine should be used as described above. Since the CNC machining machine is a relatively expensive product, not only the initial investment cost increases but also the processing time increases, resulting in delayed delivery of the product. This can happen.

[Reference 1] KR 10-0721009 B1, 2007. 05.

[Document 2] KR 20-0453058 Y1, 2011. 03. 29. 3, [0008] to [0010], drawing 1

Therefore, the present invention has been proposed to solve the problems according to the prior art, and has the following objects.

First, an object of the present invention is to provide a light guide plate manufacturing sheet capable of simplifying a work process while obtaining roughness characteristics equivalent to or higher than those of the conventional light guide plate.

Second, another object of the present invention is to provide a light guide plate manufacturing sheet which can easily adjust the size (depth, pitch, height) and shape of a light guide pattern according to the type of light source.

Third, the present invention has another object to provide a sheet for manufacturing a light guide plate that can increase the efficiency of the light source.

Fourth, another object of the present invention is to provide a light guide plate manufacturing sheet which can suppress repetition and prevent darkening occurring at the center of the screen to improve reproducibility and reliability.

Fifth, the present invention has another object to provide a sheet for manufacturing a light guide plate that can lower the initial investment cost compared to the existing in forming a light guide pattern on the light guide plate.

Sixth, the present invention has another object to provide a sheet for manufacturing a light guide plate that can use a variety of materials without limiting the material of the light guide plate in comparison with the prior art.

The present invention according to an aspect to achieve the above object is made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin combined with a transparent synthetic resin and opaque synthetic resin support sheet for refracting the light incident from the light source to the front, and A diffusion layer formed on the support sheet in a V pattern by a printing method, the diffusion layer including a plurality of diffusion beads for diffusing the light refracted from the support sheet into a transparent sheet positioned in front, and the same printing method as the diffusion layer. It is formed in a V-shaped pattern, to provide a light guide plate for manufacturing a sheet comprising an adhesive layer for bonding the back of the diffusion layer and the transparent plate to guide the light diffused through the diffusion plate.

In addition, the present invention according to another aspect for achieving the above object is made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin combined with a transparent synthetic resin and opaque synthetic resin and the support sheet for refracting the light incident from the light source to the front and A diffusion layer formed on a front surface of the support sheet, the diffusion layer including a plurality of diffusion beads for diffusing the light refracted from the support sheet into a transparent plate positioned in front of the support sheet; It is formed in a pattern, and provides a light guide plate manufacturing sheet comprising a pressure-sensitive adhesive layer for bonding the back of the diffusion layer and the transparent plate to guide the light diffused through the diffusion layer to the transparent plate.

In addition, the present invention according to another aspect for achieving the above object is made of any one selected from transparent synthetic resin, opaque synthetic resin, or a combination of transparent synthetic resin and opaque synthetic resin support sheet for refracting the light incident from the light source to the front And a pressure-sensitive adhesive layer formed on the front surface of the support sheet, the pressure-sensitive adhesive layer leading the light refracted through the support sheet to the front, and formed in a V-shaped pattern on the pressure-sensitive adhesive layer by printing. And providing a light guide plate manufacturing sheet including a diffusion layer including a plurality of diffusion beads for diffusing light induced from the adhesive layer into the transparent plates.

In addition, the present invention according to another aspect for achieving the above object is made of any one selected from transparent synthetic resin, opaque synthetic resin, or a combination of transparent synthetic resin and opaque synthetic resin support sheet for refracting the light incident from the light source to the front And a first diffusion layer formed on a front surface of the support sheet, the first diffusion layer including a plurality of diffusion beads diffusing the light refracted from the support sheet to a first transparent plate located in front of the support sheet. A first adhesive layer formed in a V-shaped pattern by a printing method and adhering the first diffusion layer and the rear surface of the first transparent plate to guide the light diffused through the first diffusion layer to the first transparent plate; A second transparent plate formed on a rear surface of the support sheet and positioned in front of the light refracted from the support sheet; A second diffusion layer including a plurality of diffusion beads to be diffused, and a V-shaped pattern formed on the second diffusion layer by a printing method, to guide light diffused through the second diffusion layer to the second transparent sheet; Provided is a light guide plate manufacturing sheet comprising a second adhesive layer for adhering a second diffusion layer and the entire surface of the second transparent plates.

In addition, the present invention according to another aspect for achieving the above object is made of any one selected from transparent synthetic resin, opaque synthetic resin, or a combination of transparent synthetic resin and opaque synthetic resin support sheet for refracting the light incident from the light source to the front And a diffusion layer formed on the support sheet in a V pattern by a printing method to diffuse light forward, and formed on the support sheet or on the diffusion layer in a V pattern by a printing method, and refracted from the support sheet. Provided is a light guide plate manufacturing sheet comprising a pressure-sensitive adhesive layer comprising a plurality of diffusion beads for diffusing the light to a transparent plate located in front.

In addition, the present invention according to another aspect for achieving the above object is made of any one selected from transparent synthetic resin, opaque synthetic resin, or a combination of transparent synthetic resin and opaque synthetic resin support sheet for refracting the light incident from the light source to the front And a pressure-sensitive adhesive layer formed on the support sheet in a V-shaped pattern by a printing method and including a plurality of diffusion beads for diffusing the light refracted from the support sheet into transparent plates positioned in front of the light guide plate. Provide a sheet.

As described above, according to the present invention, the following effects can be obtained.

First, according to the present invention, by providing a sheet for manufacturing a light guide plate including a pressure-sensitive adhesive layer (or diffusion layer) formed in a V-shaped pattern by a printing method on the support sheet to stably diffuse the light reflected from the support sheet to transparent plates The operation can be facilitated while maintaining the illuminance of light irradiated onto the surface of the transparent plate uniformly.

Second, according to the present invention, it is necessary to separately configure the diffusion sheet and the prism sheet included as essential components in the existing backlight unit by providing a light guide plate manufacturing sheet including an adhesive layer (or diffusion layer) containing diffusion beads. The thickness of the backlight unit can be reduced.

Third, according to the present invention, by providing a support sheet formed with a pressure-sensitive adhesive layer (or diffusion layer) having a V-shaped pattern by the printing method is easy to process compared to the injection or acrylic printing method according to the prior art to improve productivity and quality On the other hand, the investment cost can be reduced.

1 is a view for briefly explaining a general metering type backlight unit;
2 is a view for briefly explaining a backlight unit according to the prior art.
Figure 3 is a view showing for explaining a light guide plate manufacturing sheet according to a first embodiment of the present invention.
Figure 4 is a view showing for explaining a light guide plate manufacturing sheet according to a second embodiment of the present invention.
Figure 5 is a view showing for explaining a light guide plate manufacturing sheet according to a third embodiment of the present invention.
6 is a view for explaining a light guide plate manufacturing sheet according to a fourth embodiment of the present invention.
Figure 7 is a view showing for explaining a light guide plate manufacturing sheet according to a fifth embodiment of the present invention.
8 is a view showing for explaining a light guide plate manufacturing sheet according to a sixth embodiment of the present invention.
9 is a view for explaining a light guide plate manufacturing sheet according to a seventh embodiment of the present invention.
10 is a view for explaining a light guide plate manufacturing sheet according to the eighth embodiment of the present invention.
FIG. 11 is a view for explaining a light guide plate manufacturing sheet according to Embodiment 9 of the present invention; FIG.
12 is a view for explaining a light guide plate manufacturing sheet according to a tenth embodiment of the present invention.
FIG. 13 is a view for explaining a light guide plate manufacturing sheet according to Embodiment 11 of the present invention; FIG.
14 is a view for explaining a light guide plate manufacturing sheet according to a twelfth embodiment of the present invention.
FIG. 15 is a view for explaining a light guide plate manufacturing sheet according to Embodiment 13 of the present invention; FIG.
FIG. 16 is a view for explaining a light guide plate manufacturing sheet according to Embodiment 14 of the present invention; FIG.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

The embodiments herein are provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. And the present invention is only defined by the scope of the claims. Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

In addition, like reference numerals refer to like elements throughout the specification. Moreover, terms used herein (to be referred to) are intended to illustrate embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, the technical features of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

3 is a cross-sectional view illustrating a light guide plate manufacturing sheet according to Embodiment 1 of the present invention. (a) is a top view, (b) is sectional drawing which shows along the II 'line | wire, and (c) is sectional drawing which shows the state which the light guide plate manufacturing sheet shown to (b) adhered to the transparent plates.

Referring to FIG. 3, the light guide plate manufacturing sheet according to Embodiment 1 of the present invention may include a support sheet 31 and an adhesive layer 32 formed on the support sheet 31 and including diffusion beads 32a therein. ).

The support sheet 31 may be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin combined with a transparent synthetic resin and an opaque synthetic resin. Opaque synthetic resin means a synthetic resin that becomes white due to the mixing of white pigments or dispersion of microbubbles. For example, the support sheet 31 may include polyethylene terephthalate (PET), polyethylene naphthalate, acrylic resin, polycarbonate, polystyrene, polyolefin, cellulose acetate, polyvinyl chloride, and the like, but is not particularly limited thereto. The support sheet 31 may be formed with a coating layer of a hard surface using a large amount of an organic filler or an inorganic filler in order to increase the reflectance on the surface (single side or both sides) to improve roughness.

The thickness of the support sheet 31 is preferably, for example, 20 to 300 μm, but is not limited thereto. When the thickness of the support sheet 31 is less than 20 μm, the reflectance of the support sheet 31 itself may be insufficient to reduce the roughness. Gravure coating method and SILK printing method are difficult to apply, and the thickness of the backlight unit may increase, which may hinder the thinning of the liquid crystal display device.

As the white pigment of the support sheet 31, for example, titanium oxide, silicon oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate, aluminum oxide or the like can be used. However, the present invention is not limited thereto. Among them, it is most preferable to use titanium oxide which is excellent in concealability improvement effect. As for the average particle diameter of a white pigment, 0.05 micrometer-100 micrometers are preferable, and 0.05 micrometer-15 micrometers are the most preferable. If the average particle diameter of the white pigment is less than 0.05㎛ may cause a problem that can not give sufficient reflectivity and concealment to the light guide plate manufacturing sheet, if the average particle diameter of the white pigment exceeds 100㎛ reflectance and concealability of the reflective sheet There is a fear of this unevenness.

The adhesive layer 32 is formed by a printing method as shown in FIG. 3A, but is printed in a plurality of 'V' pattern patterns crossing the support sheet 31 in the longitudinal direction or the width direction. The adhesive layer 32 is attached to the rear of the transparent plate 33 as shown in Figure 3 (c) serves to attach the support sheet 31 to the rear of the transparent plate (33). The adhesive layer 32 is formed in a triangular pattern as shown in (b) of FIG. 3, and thus has an overall 'V' pattern shape as shown in (a) of FIG. 3.

The adhesive layer 32 having such a structure guides the light reflected from the support sheet 31 to the transparent plate 33. In addition, a plurality of diffusion beads 32a are included in the adhesive layer 32 to diffuse light reflected from the support sheet 31 into the transparent plate 33. The diffusion beads 32a may be mixed and printed together when the adhesive layer 32 is printed on the support sheet 31. The diffusion beads 32a are distributed in the adhesive layer 32 through a stirring process, and are uniformly distributed in the adhesive layer 32 to reflect or scatter incident light upwards.

Example 2

4 is a view for explaining a light guide plate manufacturing sheet according to a second embodiment of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

As shown in FIG. 4, unlike the first embodiment, the light guide plate manufacturing sheet according to Embodiment 2 has a structure in which a diffusion layer 41 is formed between the support sheet 31 and the adhesive layer 32.

The diffusion layer 41 may be formed in various pattern shapes to guide the light reflected from the support sheet 31 to the transparent plate 33 by using a silk screen printing method. The pattern shape may be formed in a circle, oval or polygon (square, hexagon, rhombus, etc.), the shape is not limited.

The diffusion layers 41 are uniformly distributed in the support sheet 31, and the sizes of the diffusion layers 41 may be the same as or different from each other in the support sheet 31. Preferably, the diffusion layer 41 may be formed to increase in size toward the center portion in the width direction of the support sheet 31 in order to improve uniformity of roughness. In this case, the width direction of the support sheet 31 refers to a direction in which the two light sources face each other when two light sources (for example, lamps) are installed to face each other on both sides of the light metering backlight unit. Therefore, the width direction of the support sheet 31 may be interpreted differently depending on the position where the light source is installed. That is, the diffusion layer 41 may improve the uniformity of illuminance by increasing the size or density of the diffusion layer 41 from the outer portion of the support sheet 31 corresponding to the direction in which the light source is installed to the center portion at a constant ratio. Here, the light source is applied to all existing light sources such as white LED, RGB LED, CCFL.

Example 3

5 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 3 of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

As shown in Figure 5, the light guide plate manufacturing sheet according to Example 3 of the present invention has a structure similar to Example 2. However, the diffusion beads 51a have a structure included in the diffusion layer 51.

The diffusion layer 51 may be formed of an acrylic resin, and in this case, the diffusion beads 51a may use acrylic beads. The diffusion beads 51a are distributed in the diffusion layer 51 through a stirring process. The diffusion beads 51a are evenly distributed in the diffusion layer 51 to reflect or scatter incident light upwards. The acrylic beads used as the diffusion beads 51a include homopolymers of alkyl acrylic esters and / or alkyl methacrylic esters and these and (meth) acrylonitrile, (meth) acrylamide, methyl (meth) acrylate and / or Beads consisting of copolymer resins such as N-methylol (meth) acrylamide can be used.

Example 4

6 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 4 of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

As shown in Figure 6, the light guide plate manufacturing sheet according to the fourth embodiment of the present invention has a structure complementing the light guide plate manufacturing sheet according to Example 3, the light guide plate manufacturing sheet according to Example 3 is a silk-screen printing method Alternatively, the gravure printing method has an advantage of easy operation, but since the diffusion layer 51 and the adhesive layer 52 are formed in a pattern structure, the diffusion layer 51 and the adhesive layer 52 may be mutually separated during silkscreen printing or gravure annealing. In some cases, a shift may occur without overlapping, and in this case, induction of light to the transparent plate 33 may not be properly performed, which may cause a problem that illuminance reliability of the backlight unit is deteriorated.

Accordingly, the light guide plate manufacturing sheet according to the fourth embodiment of the present invention has a roll coating method (gravure coating method) and a silkscreen printing method on the front surface of the support sheet 31 as shown in FIG. To form. That is, as in Example 3, the diffusion layer 61 is formed on the entire surface of the support sheet 31 in a non-patterned film form, and then the inkjet adhesive layer 32 made of an acrylic solvent-type adhesive or a silicone adhesive is formed on the inkjet. Or by using a printing method to form a pattern shape. As illustrated in FIG. 6B, the adhesive layer 32 is bonded to the rear surface of the transparent plate 33 from which the release paper (not shown) is removed, thereby adhering the light guide plate manufacturing sheet to the transparent plate 33.

In the light guide plate manufacturing sheet according to Embodiment 4 of the present invention, the diffusion layer 61 is changed from a pattern structure to a coating structure, thereby preventing the diffusion layer and the adhesion layer that may be generated in Example 3 from slipping, thereby improving the illuminance reliability of the backlight unit. The fall can be prevented.

Example 5

7 is a view for explaining a light guide plate manufacturing sheet according to a fifth embodiment of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

As shown in Figure 7, the light guide plate manufacturing sheet according to the fifth embodiment of the present invention has a structure similar to the fourth embodiment. However, the diffusion beads 71a have a structure included in the diffusion layer 71. That is, the diffusion layer 71 in which the diffusion beads 71a are agitated is formed on the support sheet 31, and the adhesion layer 72 has a single structure having a triangular pattern and the entire structure has a 'V' pattern on the diffusion layer 71. ) Is formed. The diffusion layer 71 is attached to the rear surface of the transparent plate 33 by the adhesive layer 72.

Example 6

8 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 6 of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

Referring to FIG. 8, unlike the light guide plate manufacturing sheet according to Embodiments 1 to 5, the sheet for manufacturing the light guide plate according to Embodiment 6 does not include diffusion beads, and the adhesive layer 82 and the support sheet ( 31, only the diffusion layer 81 is interposed therebetween. At this time, the diffusion layer 81 may be formed in a hemispherical, elliptical, rhombus, the shape is not limited.

The light guide plate manufacturing sheet of the present invention is formed to a thickness of 20㎛ ~ 350㎛, this sheet comprises a support sheet 31, the diffusion layer 81 and the adhesive layer 82. Such a light guide plate manufacturing sheet may be made of a structure in which a transparent synthetic resin, an opaque synthetic resin, or a transparent synthetic resin and an opaque synthetic resin are combined. That is, the support sheet 31 may be made of a combination of transparent synthetic resin, opaque synthetic resin or transparent synthetic resin and opaque synthetic resin. In the case of an opaque synthetic resin, for example, it may be composed of a pigment such as white, silver, gold, gray, and the like, and may be formed of a synthetic resin having white, silver, gold, or gray color.

Example 7

9 is a view for explaining a light guide plate manufacturing sheet according to a seventh embodiment of the present invention. (a) is sectional drawing, (b) is a figure which shows the state to which the light-guide plate manufacture sheet | seat was attached to the transparent plates.

9, the light guide plate manufacturing sheet according to Embodiment 7 of the present invention has a structure similar to that of Example 6. However, it has a structure in which the diffusion bead 92a is included in the adhesive layer 92.

The adhesive layer 92 may be formed at a height of 5 μm to 500 μm, thereby improving brightness and uniformity of light. The rear surface of the transparent plate 33 is attached to the front surface of the adhesive layer 92. As described above, the transparent plate 33 has a sheet for manufacturing a light guide plate, and functions as a light guide plate which is a medium for transmitting a light source to the upper side, that is, the front in which the liquid crystal panel is positioned. As the material, acrylic, PMMA (Polymethylmethacrylate), Polycarbonate (PC), glass (glass), polyethylene terephthalate (PET), polyethylene (PE) and the like.

Example 8

10 is a view for explaining a light guide plate manufacturing sheet according to the eighth embodiment of the present invention.

Referring to Figure 10, the light guide plate manufacturing sheet according to the eighth embodiment of the present invention has a configuration similar to the first embodiment. However, the eighth embodiment provides a method for irradiating light to the liquid crystal panel using one light source when two liquid crystal panels are installed, one each at the top and the bottom.

The light guide plate manufacturing sheet according to the eighth embodiment of the present invention has a structure in which the adhesive layers 102 and 103 are combined in a vertically symmetrical structure with respect to the support sheet 31. That is, the first adhesive layer 102 including the diffusion beads 102a is formed on the front surface of the support sheet 31, and the first transparent plates 33a are attached to the upper surface of the first adhesive layer 102. The second adhesive layer 103 including the diffusion beads 103a is formed on the rear surface of the support sheet 31, and the front surface of the second transparent plate 33b is adhered to the upper surface of the second adhesive layer 103. .

In the light guide plate manufacturing sheet structure according to the eighth embodiment, the light source is between the first transparent plate 33a and the second transparent plate 33b, preferably the first transparent plate 33a, the light guide plate manufacturing sheet and the second. In the case of the metering method located on one side (or both sides) of the transparent plate 33b, the light emitted from the light source is the first and second transparent plate 33a, respectively located on the upper and lower sides of the support sheet 31, 33b) is emitted to each liquid crystal panel. Through this, it is possible to emit uniform light to the liquid crystal panel symmetrically installed in the upper and lower portions by using one light source can improve the efficiency.

Example 9

FIG. 11 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 9 of the present invention.

Referring to FIG. 11, the light guide plate manufacturing sheet according to Embodiment 9 of the present invention has a structure in which an adhesive layer (or diffusion layer) 111 is formed in a V-shaped pattern on a support sheet 31. The adhesive layer 111 has a structure arranged in the longitudinal direction (Y-axis direction) in the same figure. As described above, the adhesive layer 111 may include the diffusion beads described in the above embodiments, and as described above, the adhesive layer 111 may be formed in a triangular structure in a single structure.

The adhesive layer 111 is densely formed by narrowing the spaced distance of the 'V' pattern toward the direction away from the light source (see arrow), for the purpose of improving illuminance uniformity of the backlight unit. In general, when the light source is installed in one side in the longitudinal direction in the drawing shown in FIG. 11, the illuminance of the side farther from the side closer to the light source is relatively lower. That is, the farther away from the light source, the lower the illuminance, and thus the illuminance uniformity of the backlight unit is inevitably lowered as a whole. Therefore, in the ninth embodiment of the present invention, the distance between the 'V' pattern of the adhesive layer 111 is further narrowed away from the light source, thereby densely producing the pattern density from the far side from the light source.

Example 10

12 is a view illustrating a light guide plate manufacturing sheet according to a tenth embodiment of the present invention.

Referring to Figure 12, the light guide plate manufacturing sheet according to Example 10 of the present invention has a structure similar to Example 9. However, unlike Example 9, the adhesive layers (or diffusion layers) 121 and 122 in the same drawing have a structure arranged in both the vertical direction and the horizontal direction. At this time, the adhesive layers 122 arranged in the horizontal direction are arranged at equal intervals, and the adhesive layers 121 arranged in the vertical direction are arranged at intervals narrowing toward the direction away from the light source.

Example 11

FIG. 13 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 11 of the present invention.

Referring to Figure 13, the light guide plate manufacturing sheet according to Example 11 of the present invention has a structure similar to Example 10. That is, in the same figure, the adhesive layers (or diffusion layers) 131 and 132 have a structure arranged in both the longitudinal direction and the transverse direction. However, unlike Example 10, the gap between the adhesive layers 131 arranged in the vertical direction toward the center portion becomes narrower, thus showing a denser pattern density than the outer portion at the center portion. The reason is that when the light sources are installed on both sides as in the same figure, the illuminance of the light source is relatively lowered in the central portion.

Example 12

14 is a view for explaining a light guide plate manufacturing sheet according to a twelfth embodiment of the present invention.

Referring to Figure 14, the light guide plate manufacturing sheet according to Example 12 of the present invention has a structure similar to Example 11. That is, in the same figure, the adhesive layers (or diffusion layers) 141 and 142 have a structure arranged in both the longitudinal direction and the transverse direction. However, in the twelfth embodiment, unlike the eleventh embodiment, the adhesive layer 141 disposed in the vertical direction as well as the adhesive layer 142 disposed in the horizontal direction are also formed to have a denser pattern at the center portion than the outer portion. Through this, it is possible to improve the illuminance uniformity in the structure in which the light sources are installed on each of the four sides.

Example 13

FIG. 15 is a view illustrating a light guide plate manufacturing sheet according to Embodiment 13 of the present invention.

Referring to FIG. 15, the light guide plate manufacturing sheet according to Embodiment 13 of the present invention includes an adhesive layer (or diffusion layer) 151, and the adhesive layer 151 is extended in an oblique line structure and disposed in a horizontal direction. As a whole, the neighboring ones intersect each other and have a structure arranged to have an 'X' shape.

Example 14

FIG. 16 is a diagram for explaining a light guide plate manufacturing sheet according to Embodiment 14 of the present invention.

Referring to FIG. 16, the light guide plate manufacturing sheet according to Embodiment 14 of the present invention has a structure in which Example 9 and Example 13 are combined. That is, the adhesive layers (or diffusion layers) 161 and 162 are included, and the adhesive layers 161 have horizontal line structures extending in the horizontal direction, and they are disposed in the vertical direction. The adhesive layer 162 has a diagonal line structure and is disposed in a horizontal direction, and has a structure in which neighboring ones cross each other and have an 'X' shape.

On the other hand, the pattern shape of the pressure-sensitive adhesive layer (or diffusion layer) described in Examples 1 to 14 is generally V-shaped, the density of these patterns, that is, the pressure-sensitive adhesive layer in the region disposed adjacent to the light source It is denser and densely increases toward the center and is densely arranged in the center. Of course, even in the case where the light source is applied in one, two, four, multiple, or circular shapes, the pattern density of the adhesive layer is formed at the same pattern density in all areas of the transparent plate, or in the region close to the light source. It is dense and increases in density toward the center, and can be arranged in the center. Here, the roughness means that the number of patterns is small, and the roughness means that the number of patterns is large.

In addition, the pattern size (diameter) of the adhesion layer (or the diffusion layer) described in Examples 1 to 14 may be formed to 0.02mm ~ 5mm, it may vary depending on the size of each product. For example, a pattern having a minimum size of the pattern, that is, a size of 0.002 mm is disposed in an area close to the light source, and gradually increases in size toward the center, thereby placing a pattern having a maximum size of 5 mm in the center. Of course, even in the case where the light source is applied in one side, two sides, four sides, or multiple sides, the pattern size of the diffusion layer or the adhesive layer is the smallest in the region close to the light source, and gradually increases in size toward the center portion. Places the largest size pattern.

As described above, although the technical spirit of the present invention has been described in detail in the preferred embodiments, it should be noted that these embodiments are for the purpose of description and not of limitation. As such, each embodiment may be independent or a combination thereof. Therefore, those skilled in the art will understand that various embodiments are possible through the combination of embodiments within the scope of the technical idea of the present invention.

31: support sheet
32, 52, 72, 82, 92, 102, 103, 111, 121, 122, 131, 132, 141, 142, 151, 161, 162: adhesive layer
32a, 51a, 71a, 102a, 103a: diffusion beads
51, 61, 71, 81: diffusion layer
33, 33a, 33b: transparent plate

Claims (16)

A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined;
A diffusion layer formed on the support sheet in a V-shaped pattern by a printing method and including a plurality of diffusion beads for diffusing the light refracted from the support sheet into a transparent plate located in front; And
A pressure-sensitive adhesive layer formed in a V pattern by the same printing method as the diffusion layer and adhering the diffusion layer and the rear surface of the transparent plate to guide light diffused through the diffusion layer to the transparent plate.
Light guide plate production sheet comprising a.
A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined;
A diffusion layer formed on a front surface of the support sheet, the diffusion layer including a plurality of diffusion beads for diffusing the light refracted from the support sheet to a transparent plate located in front; And
A pressure-sensitive adhesive layer formed on the diffusion layer in a V-shaped pattern by a printing method and adhering the diffusion layer and the rear surface of the transparent plate to guide light diffused through the diffusion layer to the transparent plate.
Light guide plate production sheet comprising a.
A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined;
A pressure-sensitive adhesive layer formed on the front surface of the support sheet and inducing light refracted through the support sheet to the front; And
A diffusion layer formed on the adhesive layer by a printing method in a V-shaped pattern, the diffusion layer including a plurality of diffusion beads adhered to the rear surface of the transparent plate to diffuse the light induced from the adhesive layer into the transparent plate.
Light guide plate production sheet comprising a.
A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined to refract light incident from a light source to the front;
A first diffusion layer formed on a front surface of the support sheet and including a plurality of diffusion beads for diffusing the light refracted from the support sheet into a first transparent plate located in front; And
A V-shaped pattern is formed on the first diffusion layer by a printing method, and the back surface of the first diffusion layer and the first transparent plate are adhered to guide the light diffused through the first diffusion layer to the first transparent plate. A first adhesive layer;
A second diffusion layer formed on a rear surface of the support sheet and including a plurality of diffusion beads for diffusing the light refracted from the support sheet into a second transparent plate located in front; And
A V-shaped pattern is formed on the second diffusion layer by a printing method, and the front surface of the second diffusion layer and the second transparent plate are adhered to guide the light diffused through the second diffusion layer to the second transparent plate. 2nd adhesive layer
Light guide plate production sheet comprising a.
A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined to refract light incident from a light source to the front;
A diffusion layer formed on the support sheet in a V pattern by a printing method to diffuse light forward; And
A pressure-sensitive adhesive layer formed on the support sheet or the diffusion layer in a V-shaped pattern by a printing method, and comprising a plurality of diffusion beads for diffusing the light refracted from the support sheet into a transparent plate located in front of the support sheet.
Light guide plate production sheet comprising a.
A support sheet configured to be made of any one selected from a transparent synthetic resin, an opaque synthetic resin, or a synthetic resin in which a transparent synthetic resin and an opaque synthetic resin are combined to refract light incident from a light source to the front; And
A pressure-sensitive adhesive layer formed on the support sheet in a V-shaped pattern by a printing method and comprising a plurality of diffusion beads for diffusing the light refracted from the support sheet into a transparent plate positioned in front of the support sheet.
Light guide plate production sheet comprising a.
7. The method according to any one of claims 1 to 6,
The diffusion beads,
Light guide plate manufacturing sheet that increases in density from the outer portion to the center portion in the width direction of the support sheet.
7. The method according to any one of claims 1 to 6,
The diffusion beads,
Light guide plate production sheet made of acrylic beads.
7. The method according to any one of claims 1 to 6,
The support sheet,
Light guide plate manufacturing sheet formed in the thickness of 20 micrometers-350 micrometers.
The method according to any one of claims 1, 2, 3, 5 or 6,
The transparent plate,
A sheet for manufacturing a light guide plate made of any one selected from acryl, polymethylmethacrylate (PMMA), polycarbonate (PC), glass, polyethylene terephthalate (PET) or polyethylene (PE).
The method according to any one of claims 1, 3 or 5,
The diffusion layer or the adhesive layer,
Light guide plate manufacturing sheet formed by a triangle.
The method according to any one of claims 1, 2, 3, 5 or 6,
The diffusion layer or the adhesive layer,
The density of the light guide plate in the region adjacent to the light source, the density increases gradually toward the center portion of the transparent plate sheet is disposed in the center of the transparent plate sheet densely arranged.
The method according to any one of claims 1, 2, 3, 5 or 6,
The diffusion layer or the adhesive layer,
It is formed to have a size in the range of 0.02mm ~ 5mm, the size is relatively small in the area adjacent to the light source, and gradually increases in size toward the center of the transparent plate, so that the pattern of a relatively large size in the center of the transparent plate Light guide plate manufacturing sheet arranged.
The method according to any one of claims 1, 2, 3, 5 or 6,
The diffusion layer or the adhesive layer,
Sheet for manufacturing a light guide plate formed to a height of 0.002mm ~ 5mm.
The method according to any one of claims 1, 2, 3, 5 or 6,
The diffusion layer or the adhesive layer,
A light guide plate manufacturing sheet formed with the same pattern density in all areas of the transparent plate.
7. The method according to any one of claims 1 to 6,
The light source is
A sheet for manufacturing a light guide plate which is disposed in one, two, four, multi-faceted or circular shape to provide the light.
KR1020110089247A 2011-09-02 2011-09-02 Sheet for manufacturing light guide plate KR20130025744A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101492583B1 (en) * 2014-02-12 2015-02-11 (주) 에스지앤테크 Light emitting type sidewalk block
CN104483728A (en) * 2014-11-21 2015-04-01 常州市诺金精密机械有限公司 Multifunctional multi-layer diffusion plate
KR20150094486A (en) * 2014-08-07 2015-08-19 주식회사스마트엘이디 Unions comprising sheet for light guide plate and release apparatus
WO2016167487A1 (en) * 2015-04-13 2016-10-20 주식회사 엘엠에스 Reflection-sheet structure having total reflection structure, and backlight unit having same
CN109786801A (en) * 2018-08-26 2019-05-21 熵零技术逻辑工程院集团股份有限公司 A kind of chemical energy electric energy conversion method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101492583B1 (en) * 2014-02-12 2015-02-11 (주) 에스지앤테크 Light emitting type sidewalk block
KR20150094486A (en) * 2014-08-07 2015-08-19 주식회사스마트엘이디 Unions comprising sheet for light guide plate and release apparatus
WO2016021760A1 (en) * 2014-08-07 2016-02-11 주식회사스마트엘이디 Sheet assembly for light guide plate
CN104483728A (en) * 2014-11-21 2015-04-01 常州市诺金精密机械有限公司 Multifunctional multi-layer diffusion plate
WO2016167487A1 (en) * 2015-04-13 2016-10-20 주식회사 엘엠에스 Reflection-sheet structure having total reflection structure, and backlight unit having same
CN109786801A (en) * 2018-08-26 2019-05-21 熵零技术逻辑工程院集团股份有限公司 A kind of chemical energy electric energy conversion method

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