WO2018021774A1 - Module à feuilles optiques du type à empilement - Google Patents

Module à feuilles optiques du type à empilement Download PDF

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Publication number
WO2018021774A1
WO2018021774A1 PCT/KR2017/007938 KR2017007938W WO2018021774A1 WO 2018021774 A1 WO2018021774 A1 WO 2018021774A1 KR 2017007938 W KR2017007938 W KR 2017007938W WO 2018021774 A1 WO2018021774 A1 WO 2018021774A1
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WO
WIPO (PCT)
Prior art keywords
light
sheet
optical sheet
adhesive layer
module
Prior art date
Application number
PCT/KR2017/007938
Other languages
English (en)
Korean (ko)
Inventor
이동철
이태준
이우종
조성식
Original Assignee
주식회사 엘엠에스
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 주식회사 엘엠에스 filed Critical 주식회사 엘엠에스
Priority to CN201780042176.5A priority Critical patent/CN109477939A/zh
Publication of WO2018021774A1 publication Critical patent/WO2018021774A1/fr

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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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/34—Optical coupling means utilising prism or grating
    • 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

Definitions

  • the present invention relates to a bonded optical sheet module, and more particularly, the bonded optical sheet module and a backlight having the same disposed along the circumference between the light collecting sheet and the diffusion sheet to block the light lost to the outside at the same time bonding. It's about the unit.
  • liquid crystal display requires a backlight unit that provides uniform light to the entire screen, unlike a conventional CRT.
  • the conventional backlight unit has a lamp which is a line light source and a lamp reflector reflecting light of the lamp is disposed on one side of the light guide unit for converting light from the lamp into a surface light source, and a lower part of the light guide unit is provided for preventing leakage of light.
  • the reflective sheet is arranged. Then, a prism sheet having a plurality of triangular linear prisms is placed thereon to focus scattered light.
  • the backlight unit developed through this method has a problem in that the emitted light does not spread evenly throughout the light guide unit because a plurality of lamps, which are light sources, are disposed to be spaced apart from each other.
  • the central portion of the front direction of the display is bright and darkens toward the periphery. Therefore, the fall of the brightness
  • the present invention is to solve the problems as described above, the object of the present invention, in the backlight unit includes an adhesive layer applied to the outermost and bonded to each other along the circumference of the light collecting sheet and the diffusion sheet, a separate black ink to the adhesive layer It is to provide a bonded optical sheet module that can improve the light leakage effect by preventing the light emitted from the light source to leak through the circumference of the light collecting sheet and the diffusion sheet.
  • the present invention relates to a light collecting sheet having a unit condenser for condensing light transmitted from a lower part and transmitting to an upper part, a diffusion sheet laminated at a lower part of the light collecting sheet and diffusing light transmitted from a lower part to the light collecting sheet; It is provided on at least a portion along the circumference of the diffusion sheet and the light collecting sheet and includes an adhesive layer for bonding the diffusion sheet and the light collecting sheet to prevent peeling.
  • the adhesive layer may include a black ink therein to shield the light from being lost to the outside in the inner space between the light collecting sheet and the diffusion sheet.
  • the adhesive layer is provided in a first area of the periphery of the light collecting sheet and the diffusion sheet, the light source is located in the second area, the shielding portion including the black ink and the remaining portion other than the shielding portion is collected. It may include a bonding portion for bonding the sheet and the diffusion sheet.
  • junction part may have a predetermined pattern in the second area, and a plurality of junction parts may be spaced apart from each other.
  • the bonding portion may be formed so as to decrease the adhesion width in the direction away from the light source.
  • the bonding part may include at least a portion of the black ink to shield the light from going out in the internal space.
  • the adhesive layer may include a separate silica beads therein to prevent deformation from occurring due to temperature and humidity.
  • the adhesive layer may be provided with a separate reflective coating on the bottom to recycle light lost to the outside in the internal space.
  • the backlight unit according to another aspect of the present invention includes the above-described optical sheet module.
  • FIG. 1 is an exploded perspective view showing the configuration of a backlight unit equipped with an optical sheet module according to an embodiment of the present invention
  • FIG. 2 is a side view of an optical sheet module in the backlight unit of FIG. 1;
  • FIG. 3 is a view showing a state in which an adhesive layer is applied in the optical sheet module of FIG.
  • FIG. 4 is a view showing a modified state of the adhesive layer in the optical sheet module of FIG.
  • FIG. 5 is a view showing the top and bottom cross-sectional shape of the adhesive layer in the optical sheet module of FIG.
  • FIG. 6 is a view showing a state in which a separate bead is further included inside the adhesive layer in the optical sheet module of FIG.
  • FIG. 7 is a view illustrating a state in which the separate reflective coating is further provided on the adhesive layer in the optical sheet module of FIG. 2.
  • An optical sheet module will be described by taking an example that is applied to a backlight unit of a flat panel liquid crystal display such as an LCD or an LED panel.
  • the present invention is not necessarily limited thereto, and may be used alone as an optical sheet, or may be a backlight unit applied to another apparatus other than the liquid crystal display device, or may change a characteristic and a path of light such as a lighting fixture. Any device may be used.
  • FIGS. 1 to 3 a schematic configuration of a backlight unit to which an optical sheet module according to an embodiment of the present invention is applied is as follows.
  • FIG. 1 is an exploded perspective view showing the configuration of a backlight unit with an optical sheet module according to an embodiment of the present invention
  • Figure 2 is a view showing the side of the optical sheet module in the backlight unit of Figure 1
  • Figure 3 is Figure 2
  • Figure is a view showing a state in which the adhesive layer is applied in the optical sheet module.
  • a back light unit (BLU) for providing light to the liquid crystal panel must be provided in constructing the liquid crystal display.
  • the backlight unit includes a light emitting unit 100, an adhesive layer 200, a diffusion sheet 300, and a light collecting sheet 400.
  • the light emitting unit 100 includes a light source 110, a reflector 120, and a light guide plate 130 in a configuration of transmitting light emitted from the light emitting unit 100 into a surface light source.
  • the light source 110 generally generates light at the side of the light guide plate 130 and transmits light to the light guide plate 130.
  • an LED Light Emitting Diode
  • CCFL Cold Cathode Fluorescent Lamp
  • the light source 110 may be composed of at least one or more, and may emit light toward the side of the light guide plate 130.
  • the light incident on the light guide plate 130 proceeds with total reflection inside the light guide plate 130, and the light incident on the surface of the light guide plate 130 at an angle of incidence smaller than the critical angle is transmitted without being totally reflected, and thus is emitted upward. .
  • the reflector 120 is provided below the light guide plate 130, and is configured to increase light efficiency by reflecting light emitted from the inside of the light guide plate 130 to the light guide plate 130.
  • the light emitting unit 100 is configured as described above, and the light emitted from the light source 110 is transmitted to the upper diffusion sheet 300 in the form of a surface light source by the light guide plate 130 and the reflector plate 120.
  • the diffusion sheet 300 is disposed on the light guide plate 130 to diffuse the light and to be evenly transferred to the light collecting sheet (400).
  • the diffusion sheet 300 is configured to uniformly diffuse the light transmitted to the upper portion through the light guide plate 130 and the reflecting plate 120 provided at the lower portion, and transmit the light to the light collecting sheet 400 positioned at the upper portion.
  • the diffusion sheet 300 has a non-uniform diffusion pattern is formed on the upper surface or the lower surface or formed on both sides, it serves to diffuse the light.
  • the diffusion pattern is formed in the form of a spherical protrusion of non-uniform size to diffuse the light.
  • the light collecting sheet 400 is arranged in the form of being laminated or bonded to the upper portion of the diffusion sheet 300 to collect the light transmitted and move to the top.
  • the light collecting sheet 400 may be formed in the form of a single prism sheet, or may be formed in the form of a plurality of laminated prismatic sheet.
  • the light condensing sheet 400 configured as described above collects light by refracting the light transmitted through the diffusion sheet upward.
  • the light condensing sheet 400 includes a plurality of unit condensers having a regular prism shape, and includes the upper optical sheet 410 and the lower optical sheet 420.
  • the upper optical sheet 410 is largely composed of a first base film 414 and a first structured pattern 412.
  • a light transmissive film is generally used to easily transmit light incident from the bottom.
  • An upper surface of the first base film 414 is formed such that the first structured pattern 412 for refracting and condensing incident light is integrated with the first base film 414.
  • the first structured pattern 412 is configured such that a plurality of unit condensers are formed on the surface of the first base film 414 continuously and protrude in an upward direction to form a plurality of unit condensers having an inclined surface having a smaller cross sectional area toward the top. do.
  • the unit condenser refracts and condenses the light transmitted through the first base film 414 and transmits the light to the upper portion.
  • the first structured pattern 412 includes a plurality of prismatic shapes formed so that upper and lower end surfaces of a triangular shape extend in one direction.
  • the lower optical sheet 420 may be formed similarly to the upper optical sheet 410 described above, and the second base film 424 and the second structured pattern 422 are largely formed.
  • the second structured pattern 422 is formed on the lower surface of the upper optical sheet 410 and is formed on an upper surface of the second base film 424.
  • the second base film 424 transmits the light transmitted from the diffusion sheet 300 disposed below and to the upper side, and at the same time, the second structured pattern ( 422 is formed.
  • the second structured pattern 422 is formed to have a smaller cross sectional area toward the top, and the second structured pattern 422 refracts and condenses the light transmitted from the diffusion sheet 300 to the top. .
  • the second structured pattern 422 includes a plurality of unit condensers having an inclined surface on an upper surface of the second base film 424 and formed to have a small cross-sectional area in an upward direction.
  • the first structured pattern 412 and the second structured pattern 422 are each formed by repeatedly providing the unit condenser continuously.
  • first structured pattern 412 and the second structured pattern 422 may be composed of the unit condensers having the same shape and size as shown, or may be formed to have different shapes or sizes. It may be.
  • the light condensing sheet 400 includes the upper optical sheet 410 and the lower optical sheet 420, and the upper optical sheet 410 and the lower optical sheet 420 are arranged to cross each other. do.
  • the upper optical sheet 410 and the lower optical sheet 420 may be stacked or bonded to each other.
  • the light collecting sheet 400 may be formed to have an inverted prism shape so that the unit light collecting body is provided on a lower surface thereof to condense light through total internal reflection of light.
  • the adhesive layer 200 is provided at least in part along the circumference of the diffusion sheet 300 and the light collecting sheet 400 and the peeling occurs by bonding the diffusion sheet 300 and the light collecting sheet 400. To prevent them.
  • the adhesive layer 200 as shown in Figures 2 and 3 is configured to bond between the diffusion sheet 300 and the light collecting sheet 400, it is applied to the outermost along the circumference do.
  • the diffusion sheet 300 and the light collecting sheet 400 are adhered to each other by the adhesive layer 200 applied as described above, and then, through the punching operation, the diffusion sheet 300, the light collecting sheet 400, and the adhesive layer ( A part of 200) will be removed.
  • the adhesive layer 200 is removed after leaving only a minimum area for bonding the diffusion sheet 300 and the light collecting sheet 400.
  • the adhesive layer 200 includes a separate black ink (not shown), which is leaked to the outside in the internal space (S) between the light collecting sheet 400 and the diffusion sheet 300 is lost. Configured to shield.
  • the adhesive layer 200 may include at least a portion of the black ink, and thus may serve as a light shielding tape to shield occurrence of light leakage.
  • the adhesive layer 200 is provided in the first area (A) which is the side of the light source 110 is located around the light collecting sheet 400 and the diffusion sheet 300 and the Bonding portion 220 provided in the shielding portion 210 including the black ink and the second region (B) except for the shielding portion 210 to bond the light collecting sheet 400 and the diffusion sheet 300 ).
  • the shielding portion 210 is provided in the first region A adjacent to the light source 110 as shown, and includes the black ink, thereby serving as a light shielding tape in addition to the adhesive function. That is, it is possible to reduce the variation in the intensity of the light generated due to the portion or the gap that the light of the plurality of light sources 110 does not reach.
  • the bonding portion 220 is provided on the second area (B), it is bonded to prevent the separation of the light collecting sheet 400 and the diffusion sheet (300).
  • the junction 220 may include the black ink described above, or alternatively, may be composed of only an adhesive.
  • the adhesive layer 200 includes the shielding portion 210 and the bonding portion 220, and stably bonds the light collecting sheet 400 and the diffusion sheet 300 to the outside of the outermost portion. The improvement can be prevented from occurring.
  • the adhesive layer 200 includes a black ink
  • the light emitted from the light emitting unit 100 may be prevented from leaking out of the internal space S, thereby reducing the variation in the intensity of light.
  • FIG. 4 is a view illustrating a modified state of the adhesive layer 200 in the optical sheet module of FIG. 2, and FIG. 5 is a top and bottom cross-sectional view of the adhesive layer 200 in the optical sheet module of FIG. 4.
  • the junction part 220 is not applied to the entire second area B, but a plurality of them have a predetermined pattern and are spaced apart from each other.
  • the plurality of bonding parts 220 are disposed to be spaced apart from each other in the second area B, so that only a part of the bonding part 220 is not applied to the upper surface of the circumferential part of the diffusion sheet 300 so that light transmitted from the lower part is more stably. Can spread.
  • the junction 220 may be configured to have a vertical cross-sectional shape of various forms, as shown in Figure 5, it may be formed differently the size and spacing interval of the junction 220 according to the characteristics.
  • junction 220 may be formed to have a smaller adhesive width toward the direction away from the light source 110.
  • junction portion 222 may be formed in the shape of the junction portion 220 in various forms as shown in Figure 5, the area bonded to the lower portion of the light collecting sheet 400 of the upper according to the cross-sectional shape of the junction portion 220 This changes, and thus the luminance changes.
  • the area bonded to the lower optical sheet 420 at the upper part is large, and thus the adhesive force is increased, but the light loss depends on the adhesion area. Can be generated so that the brightness can be reduced.
  • the overall brightness and the adhesive force with the lower optical sheet 420 may be adjusted according to the cross-sectional shape in the vertical direction of the junction 220.
  • FIG. 6 is a view illustrating a state in which an additional bead 230 is further included inside the adhesive layer 200 in the optical sheet module of FIG. 2
  • FIG. 7 is a separate reflection on the adhesive layer 200 in the optical sheet module of FIG. 2.
  • the adhesive layer 200 according to the present invention may further include separate silica beads 230 as well as the adhesive and the black ink.
  • the bonding force of the adhesive layer 200 itself may be increased to minimize deformation of the light collecting sheet 400 and the diffusion sheet 300.
  • the adhesive layer 200 may prevent the deformation by supporting it.
  • the adhesive layer 200 may include the bead 230 together with the black ink, and the bonding part 220 may be configured to include only the bead 230 without the black ink. It may be.
  • a separate reflection coating 240 may be further included in the adhesive layer 200 instead of the silica beads 230.
  • the adhesive layer 200 is provided with a separate reflection coating 240 at the bottom, thereby reflecting the light leaking out from the internal space (S).
  • the reflective coating 240 recycles the light lost at the outermost sides of the diffusion sheet 300 and the light collecting sheet 400 and transfers the light back to the internal space S, thereby increasing the overall brightness.
  • the reflective coating 240 is made of silver (Ag), and various materials may be applied thereto.
  • the adhesive layer 200 may be configured to include black ink at least in part, and unlike the shielding part 210, the bonding part 220 may not be configured to include the black ink.

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

Abstract

La présente invention concerne un module de feuille optique qui est stratifié sur une unité électroluminescente comprenant une source de lumière disposée sur un côté du périmètre de celle-ci et une partie de guidage de lumière pour transmettre vers le haut la lumière émise à partir de la source de lumière, et fournit un module de feuille optique comprenant : une feuille de collecte de lumière ayant une unité de collecteur de lumière formée sur une surface de celle-ci, l'unité de collecte de lumière collectant la lumière transmise par le dessous et transmettant la lumière collectée vers le haut; une feuille de diffusion, stratifiée au-dessous de la feuille de collecte de lumière, pour diffuser la lumière transmise depuis le dessous dans la feuille de collecte de lumière; et une couche adhésive, disposée au moins sur une partie d'un périmètre entre la feuille de diffusion et la feuille de collecte de lumière, pour lier la feuille de diffusion et la feuille de collecte de lumière pour empêcher la délamination de celle-ci, la couche adhésive comprenant une encre noire pour bloquer la fuite de la lumière d'un espace interne entre la feuille de collecte de lumière et la feuille de diffusion vers l'extérieur.
PCT/KR2017/007938 2016-07-26 2017-07-24 Module à feuilles optiques du type à empilement WO2018021774A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780042176.5A CN109477939A (zh) 2016-07-26 2017-07-24 接合型光学片模块

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0095013 2016-07-26
KR1020160095013A KR20180012137A (ko) 2016-07-26 2016-07-26 접합형 광학시트 모듈

Publications (1)

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WO2018021774A1 true WO2018021774A1 (fr) 2018-02-01

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CN (1) CN109477939A (fr)
WO (1) WO2018021774A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102221196B1 (ko) 2018-11-16 2021-03-03 주식회사 엘엠에스 차폐 성능이 향상된 확산 시트 및 이를 포함하는 백라이트 유닛
KR102513442B1 (ko) * 2020-11-06 2023-03-24 주식회사 엘엠에스 광학 필름 및 이를 포함하는 백라이트 유닛

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09288215A (ja) * 1996-02-20 1997-11-04 Nissha Printing Co Ltd 面発光装置
JP2004231736A (ja) * 2003-01-29 2004-08-19 Dainippon Ink & Chem Inc 反射・遮光性粘着テープ
JP2007173031A (ja) * 2005-12-22 2007-07-05 Dainippon Printing Co Ltd 光制御シート、面光源装置
JP2009116014A (ja) * 2007-11-06 2009-05-28 Toppan Printing Co Ltd レンズシート、ディスプレイ用光学シートおよびそれを用いたバックライトユニット、ディスプレイ装置
KR20130077708A (ko) * 2011-12-29 2013-07-09 제일모직주식회사 프리즘 시트, 이를 포함하는 백라이트 유닛 및 이를 포함하는 광학 표시 장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090014497A (ko) * 2007-08-06 2009-02-11 엘지이노텍 주식회사 백라이트 유닛 및 그 제조방법 그리고 디스플레이 장치
KR20130005330A (ko) * 2011-07-06 2013-01-16 글로텍 주식회사 광학시트 및 그 제조방법, 광학시트를 이용한 액정표시장치
CN205374937U (zh) * 2015-12-30 2016-07-06 中新科技集团股份有限公司 一种新型的液晶显示背光模组

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09288215A (ja) * 1996-02-20 1997-11-04 Nissha Printing Co Ltd 面発光装置
JP2004231736A (ja) * 2003-01-29 2004-08-19 Dainippon Ink & Chem Inc 反射・遮光性粘着テープ
JP2007173031A (ja) * 2005-12-22 2007-07-05 Dainippon Printing Co Ltd 光制御シート、面光源装置
JP2009116014A (ja) * 2007-11-06 2009-05-28 Toppan Printing Co Ltd レンズシート、ディスプレイ用光学シートおよびそれを用いたバックライトユニット、ディスプレイ装置
KR20130077708A (ko) * 2011-12-29 2013-07-09 제일모직주식회사 프리즘 시트, 이를 포함하는 백라이트 유닛 및 이를 포함하는 광학 표시 장치

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Publication number Publication date
CN109477939A (zh) 2019-03-15
KR20180012137A (ko) 2018-02-05

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