KR20080097880A - Surface light and manufacturing method of the same - Google Patents

Surface light and manufacturing method of the same Download PDF

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Publication number
KR20080097880A
KR20080097880A KR1020070043284A KR20070043284A KR20080097880A KR 20080097880 A KR20080097880 A KR 20080097880A KR 1020070043284 A KR1020070043284 A KR 1020070043284A KR 20070043284 A KR20070043284 A KR 20070043284A KR 20080097880 A KR20080097880 A KR 20080097880A
Authority
KR
South Korea
Prior art keywords
light
light source
sheet
prism
liquid crystal
Prior art date
Application number
KR1020070043284A
Other languages
Korean (ko)
Inventor
김광수
Original Assignee
김광수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김광수 filed Critical 김광수
Priority to KR1020070043284A priority Critical patent/KR20080097880A/en
Publication of KR20080097880A publication Critical patent/KR20080097880A/en

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Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • G02B6/005—Means 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A surface light source device is provided to have light guide, scattering and diffusing, reflection, and light directivity characteristic at a work process, and improve the light emission efficiency and brightness, while implementing slim structure. An MOG(Multi Optical Generator) layer comprises light guide plate for guiding light to the vertical and horizontal prism, and diffuses, scatters, and reflects light. A reflector is located on the bottom of the light guide plate, reflects light to the prism. The MOG integrating surface light source comprises a film sheet(106) having a reflection plate, a horizontal/vertical prism sheet(102,103) formed on the MOG, light source composed of a plurality of line light source, of LEDs, and a protection film(101).

Description

Surface light source device and its manufacturing method {SURFACE LIGHT AND MANUFACTURING METHOD OF THE SAME}

1 is a structural diagram of a conventional back art unit,

2 is a structural diagram of an MOH integrated surface light source device according to the present invention;

3 is a plane light source generation key according to the optical waveguide and scattering and diffusion in an MGG (MOG) integrated surface light source device of the present invention,

4 is Bayer's disease in which light-scattering materials-liquid crystals, beads, and air bubbles are mixed in a heat and UV-curable polymer

Figure 5 is a density distribution before curing according to the combination of the thermosetting polymer or ultraviolet curable polymer and light scattering material.

6 is a density distribution diagram of light scattering material between polymers after curing between the reflective film sheet and the prism film sheet.

***** Explanation of symbols for the main parts of the drawing *****

101: protective film sheet 102: film sheet with a horizontal prism

103: film sheet with vertical prism 104: film sheet with diffusion layer

105: light guide plate 106: film sheet with reflection plate

107: line light source or LED (LED) point light source of the cold cathode tube fluorescent lamp (CCFL)

108: surface light source

109: MOG: Multi-Optical Generator

201 UV-curable or thermosetting polymer

202: liquid crystal droplets or liquid crystal layer 203: beads

204: air bubbles

205: Bayer bottle mixed with a liquid crystal in a polymer

206: Bayer bottle mixed with polymer beads

207: Bayer bottle mixed with air bubbles in polymer

The present invention relates to a lighting device of a light receiving type image display device, and more particularly, to a surface light source device used as a back light source of a light receiving display device such as a liquid crystal display device, and particularly, a light scattering material in a thermosetting polymer or an ultraviolet curing polymer. To make a multi-optical generator (MOG) to make optical waveguide, scattering, refraction, and diffusion. In addition, it is manufactured as an integral type of prism sheet-MOG layer-reflective sheet. Wave-scattering-refraction-reflection-diffusion-light propagation proceeds integrally and relates to a surface light source device for improving the brightness of the backlight unit.

In general, image display elements such as liquid crystal display elements, such as light receiving display elements, are themselves elements that form images by receiving light from the outside without emitting an image.

In order to solve such problems, the surface light source is installed on the back of the display device so that the image can be viewed by irradiating light. Recently, the surface light source device has been widely highlighted in advertisement lighting and signboard lighting.

1 shows a general structure diagram of a conventional surface light source device. In general, the planar light source device used for the backlight includes a light source lamp 107, a light guide plate (LGP) 105, a reflector sheet (RS) 106, a diffuser sheet (DS) 104, Prismatic sheet (PS) 102 and 103. The lamp is a light source for injecting light into the backlight unit, and mainly cold cathode fluorescent lamps (CCFL), LEDs (LEDs), or ELs (EL) are used.

The light guide plate is a component that converts the light incident from the lamp into uniform plane light, and mainly uses acrylic resin. The reflector is positioned below the light guide plate to reflect light scattered from the light guide plate to the light emitting surface of the backlight. Such a material is mainly used by coating a metal film on a polyester film. The diffuser plate is positioned on the light guide plate to diffuse and scatter light emitted from the light guide plate and the light guide plate. On top of this resin, a surface diffusion layer is applied. The prism plate increases brightness by using two vertical and horizontal prisms to have light directivity so that the light from the diffusion plate exits only in the front direction of the light exit surface.

In the conventional planar light source device configured as described above, most of them use a light guide plate. In order to scatter and reflect light on the light guide plate, scattering patterns, refractions, and reflection patterns may be printed or molded as dots or fine rough processing. It is used for injection molding, and it forms a surface diffusion layer directly on the light guide plate or a prism on the surface diffusion layer to reduce the number of sheets, improve the characteristics, reduce the thickness, and reduce the manufacturing cost and workability. Various studies are needed to make it good.

The present invention has been made in view of the problems of the conventional planar light source device as described above, the optical waveguide and scattering and diffusion, reflection, light directivity is made at once, all in one process, to increase the light emission rate and improve the luminous luminance To provide a device that minimizes the overall thickness of the backlight unit.

The first is to use a light scattering material (Fig. 3) to mix the liquid crystal 202 or the beads 203 or air bubbles 204 with the ultraviolet or thermosetting polymer 201 to use a material that causes light scattering. The material is integrated by lamination by printing or dispensing ejection between the plate or film sheet 103 on which the reflecting plate 106 is formed and the plate or film sheet 103 on which the prism 102 is formed. By curing, a surface light source device is provided that simultaneously provides optical waveguide, scattering, diffusion, reflection, and light directivity.

Hereinafter, with reference to the accompanying drawings will be described in detail the advantages, features and preferred embodiments of the present invention.

2 is a cross-sectional view of an MOH integrated surface light source device according to an embodiment of the present invention. The MOH integrated surface light source device includes a film sheet 106 having a reflecting plate, an mOH layer 109 formed thereon, vertical and horizontal prism sheets 103 and 102 formed on the MOH layer, and a protective film sheet 101. ) And a light source 107 composed of linear light sources such as CCFL or point light sources such as LED.

FIG. 3 is a cross-sectional view illustrating the surface light source generation basis due to the optical waveguide, scattering, and diffusion in the MOG integrated surface light source device according to the present invention.

Figure 4 shows Bayer disease forming the MOG layer used in the present invention. The MOG layer is formed by mixing (1) liquid crystal 202, (2) beads 203, or (3) air bubbles 204 with ultraviolet curable or thermosetting polymer 201. Bayer bottles 205, 206, and 207 represent a state in which a liquid crystal 202, a bead 203, or an air bubble 204 is mixed with an ultraviolet curable or thermosetting polymer 201.

Figure 5 shows the density distribution before curing according to the combination of the thermosetting polymer or ultraviolet curable polymer and the light scattering material, Figure 6 shows the density distribution of the light scattering material between the polymer after curing between the reflective film sheet and the prism film sheet It is. FIG. 6A shows a state of curing using a mixture of 99 w% of a polymeric material and 1 w% of a liquid crystal, and FIG. 6B shows a state of curing using a mixture of 50 w% of a polymeric material and 50 w% of a liquid crystal. FIG. 6C shows a state of curing using a mixture of 1 w% of polymeric material and 99 w% of liquid crystal.

The present invention has been made in view of the above-described problems and objectives of the conventional backlight unit, and is to form a multi-light generating layer (MOG) between a prism plate or sheet and a reflecting plate or sheet which are horizontal, vertical, or vertical-horizontal. An integrated backlight unit is provided.

In addition, the present invention is the optical waveguide, scattering, refraction diffusion by curing by mixing the (1) liquid crystal, (2) transparent beads of different refractive index, or (3) air bubbles in a transparent thermosetting or UV-curable polymer resin transparent It is to provide a layer made of this.

Furthermore, the size of the liquid crystal, the beads, and the air bubbles are to provide a layer having at least a thickness smaller than that of the MOH layer and having a uniform or different density distribution.

Furthermore, a plate on which the reflecting plate 106 is formed, including a plate or film sheet 103 including one prism 102 in a vertical or horizontal component, and a material that is light guided and scattered and diffused. And forming a light guide plate in which the film sheet 103 is integrated, and adjusting the size and density of the liquid crystal 202 or the bead 203 or the air bubble 204 to the ultraviolet light curable or thermosetting polymer 201 according to the brightness of the light and scattering light. By adjusting the thickness of the materials (Fig. 3) to control the degree of scattering and diffusion, the size of the liquid crystal 202, the beads 203, and the air bubbles range from 0.1 micrometers to 100 micrometers, in particular liquid crystals. Silver is within ± 20% error of 1 micrometer, beads are from 1 micrometer to 50 micrometers, air bubbles are from 1 micrometer to 50 micrometers, and density is 1% compared to polymer 201. In the range of 99%, especially in the range of 20% to 80%, the thickness of the light-generating layer is in the range of 5 micrometers to 100 micrometers, in particular in the range of 20-30 micrometers ± 50%. Adjust the product according to the characteristics of the product.

There is provided a surface light source device in which a light scattering material is positioned between a plate and a film sheet on which a reflective film is formed and a plate and film sheet on which a prism is formed to simultaneously generate a waveguide, scattering, diffusion, and reflection.

According to the surface light source device of the present invention configured as described above, the transparent heat and UV-curable polymer resin is composed of a resin layer in which liquid crystal, transparent beads, and air bubbles are mixed. Scattering, refraction, and diffusion are formed.

Therefore, the above-mentioned multi-light generation is formed, and the scattered light dispersed therein is re-incident to the multi-light generation layer by the reflecting plate installed below and diffused to the upper surface.

In addition, the light diffused to the upper surface is formed as a surface light source having a light directivity by the prism sheet installed on the top, according to the series of such backlight unit according to the present invention, when using this product, the manufacturing process is simplified and corresponds to small to large It is possible to make products at low cost and to adjust the brightness according to the characteristics of the product.

While preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only, and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. You must lose.

Claims (5)

A surface light source device for forming a multi-light generating layer between a reflecting plate and a sheet, and a prism plate and a sheet, wherein the liquid crystal, transparent beads, and air bubbles are mixed with heat and UV-curable polymer resin and cured. The method of claim 1, Thermal and UV-curable polymer resin is transparent, in order to generate a multi-light generation, a multi-light generation layer, characterized in that the cured by mixing a liquid crystal, a transparent bead, air bubbles having different refractive index. The method according to claim 1 or 2, The size of the liquid crystal, the transparent beads, and the air bubbles mixed in the multi-light generating layer are distributed in the same or different particle size sizes below the thickness of the layer. The method according to claim 1 or 2, And the multi-light generating layer covers the entire area of the surface light source device. The method according to claim 1 or 2, And said poly light generating layer is applied to one surface of a reflecting plate or sheet, or one surface of a prism plate or sheet, or is applied between said reflecting plate or sheet and a prism plate or sheet and cured.
KR1020070043284A 2007-05-03 2007-05-03 Surface light and manufacturing method of the same KR20080097880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070043284A KR20080097880A (en) 2007-05-03 2007-05-03 Surface light and manufacturing method of the same

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Application Number Priority Date Filing Date Title
KR1020070043284A KR20080097880A (en) 2007-05-03 2007-05-03 Surface light and manufacturing method of the same

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KR20080097880A true KR20080097880A (en) 2008-11-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102411163A (en) * 2010-07-23 2012-04-11 颖台科技股份有限公司 Light-guide apparatus, and backlight module and LCD device having same
CN108598092A (en) * 2018-05-14 2018-09-28 昆山龙腾光电有限公司 Manufacturing method of array base plate and array substrate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102411163A (en) * 2010-07-23 2012-04-11 颖台科技股份有限公司 Light-guide apparatus, and backlight module and LCD device having same
KR101222165B1 (en) * 2010-07-23 2013-01-14 엔타이어 테크놀로지 캄파니 리미티드 light-guide apparatus and backlight module comprising the same and liquid crystal display comprising the same
CN108598092A (en) * 2018-05-14 2018-09-28 昆山龙腾光电有限公司 Manufacturing method of array base plate and array substrate

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