WO2011129587A2 - Light-condensing film having superior anti-adhesion performance and superior moiré prevention effects, backlight unit comprising same, and display device comprising the backlight unit - Google Patents

Light-condensing film having superior anti-adhesion performance and superior moiré prevention effects, backlight unit comprising same, and display device comprising the backlight unit Download PDF

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Publication number
WO2011129587A2
WO2011129587A2 PCT/KR2011/002578 KR2011002578W WO2011129587A2 WO 2011129587 A2 WO2011129587 A2 WO 2011129587A2 KR 2011002578 W KR2011002578 W KR 2011002578W WO 2011129587 A2 WO2011129587 A2 WO 2011129587A2
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WO
WIPO (PCT)
Prior art keywords
lens structure
protrusion
protrusions
film
light
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PCT/KR2011/002578
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French (fr)
Korean (ko)
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WO2011129587A3 (en
Inventor
김경모
정수희
한상철
Original Assignee
주식회사 엘지화학
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Priority claimed from KR1020110033197A external-priority patent/KR101214648B1/en
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201180015254.5A priority Critical patent/CN102933989B/en
Priority to US13/634,807 priority patent/US9494727B2/en
Priority to JP2013504816A priority patent/JP5646728B2/en
Publication of WO2011129587A2 publication Critical patent/WO2011129587A2/en
Publication of WO2011129587A3 publication Critical patent/WO2011129587A3/en

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    • 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
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to a light collecting film, and a backlight unit and a display device including the same, and more particularly, to a light collecting film and a backlight and a display device including the same excellent in adhesion preventing and moiré prevention between the film.
  • a liquid crystal display injects a liquid crystal material between an upper substrate on which a common electrode and a color filter are formed, and a lower substrate on which a thin film transistor and a pixel electrode are formed.
  • a liquid crystal display injects a liquid crystal material between an upper substrate on which a common electrode and a color filter are formed, and a lower substrate on which a thin film transistor and a pixel electrode are formed.
  • the liquid crystal display is a light receiving element that does not emit light by itself
  • a backlight unit for supplying light is required.
  • the backlight unit includes a light source for supplying light, a diffusion plate or a light guide plate for converting a line light source or a point light source, and the like into a surface light source, and a plurality of optical films for improving light performance.
  • the optical film used in the backlight unit includes a condensing film that improves brightness by deflecting light in the front direction, a diffusion film that deflects defects on the back surface of the backlight, and a function of concealing the bright lines of the light source.
  • the light condensing film, the diffusion film, the protective film and the like are laminated to each other, there is a problem in that the laminated film is in close contact (blocking) causing surface defects.
  • 1 shows the wet-out phenomenon and the adhesion (blocking) phenomenon that appear when the protective film is laminated on the light collecting film.
  • a defect due to the film adhesion occurs, it is necessary to improve the quality of the display device because it is deteriorated.
  • a technique of forming protrusions at regular intervals on a peak portion of a light collecting film having a lenticular lens or a prism lens structure has been proposed.
  • the film can be prevented from adhering to each other, but there is a problem in that the moire due to the lens structure and the protrusion is severe and the image quality is degraded.
  • the irregularly formed protrusions may be partially improved such moire, it is technically very difficult to manufacture a mold formed with irregular protrusions on the lens structure.
  • a condensing film such as a lenticular lens or a prism is manufactured through a mold having an engraved surface shape, and the engraving is performed through a bite processing or the like. Therefore, in order to produce a light collecting film having irregularly arranged protrusions, it is necessary to irregularly control a frequency during bite processing, which is very difficult because mold processing is performed at a high speed rotation state.
  • the present invention is to solve the above problems, and provides a light collecting film, a backlight unit and a display device including the same that can perform film adhesion prevention and moire prevention at the same time.
  • the present invention in one aspect, includes a plurality of lens structures extending in one direction on one surface, formed on the lens structure, a plurality of protrusions arranged along the same direction as the extension direction of the lens structure
  • the first protrusion consisting of;
  • a second protrusion formed on the lens structure and including a plurality of protrusions arranged along a direction having a predetermined angle with respect to an extension direction of the lens structure.
  • the invention provides a light source; A light guide plate disposed at a side of the light source and controlling a path of light emitted from the light source; And it provides a backlight unit comprising a light collecting film of the present invention disposed on the light guide plate.
  • the invention provides a light source; A diffuser plate disposed above the light source and configured to diffuse light emitted from the light source; And it provides a backlight unit comprising a light collecting film of the present invention disposed on the diffusion plate.
  • the present invention provides a display device including the backlight unit.
  • the light collecting film of the present invention can prevent the adhesion of the film, and can prevent the occurrence of wet-out or surface defects, has an advantage of excellent moiré prevention effect, it is possible to implement excellent image quality.
  • the light collecting film of the present invention can realize a uniform product quality due to its simple manufacturing method and excellent productivity and excellent reproducibility.
  • 1 is a view showing the wet-out phenomenon and the adhesion (blocking) phenomenon when the protective film is laminated on the light collecting film.
  • FIG. 2 is a view showing an embodiment of a light collecting film of the present invention.
  • FIG. 3 is a diagram illustrating an embodiment of a backlight unit of the present invention.
  • FIG. 4 is a view showing another embodiment of the backlight unit of the present invention.
  • the present inventors have conducted research to develop a condensing film that can prevent adhesion between films without moiré, and as a result, the projections arranged in the same direction as the extending direction of the lens structure and the extending direction of the lens structure are arranged in an oblique direction.
  • the light condensing film of the present invention having the formed protrusions was developed.
  • FIG 1 shows an embodiment of the light collecting film of the present invention.
  • the light collecting film 1 of the present invention forms two projections 30 and 40 having different arrangement directions on the lens structure 20, thereby preventing moiré while effectively preventing adhesion between films. It is designed to be minimal.
  • the light condensing film of the present invention has a regular arrangement, so that it is not necessary to change the frequency during the film processing, so that the manufacturing is easy and the product reproducibility is excellent, so that the constant quality can be maintained. have.
  • the light collecting film 1 of the present invention includes a plurality of lens structures 20 extending in one direction on one surface thereof, and the first protrusions 30 having different arrangement directions on the lens structures 20. ) And the second protrusion 40.
  • the lens structure 20 is to improve the luminance of the visible range by deflecting the light emitted from the light source in a predetermined direction.
  • the lens structure 20 may be a prism lens, a lenticular lens, or a combination thereof extending in one direction.
  • the prism lens includes not only a lens having a triangular cross section, but a deformed prism in which the lens peak portion is deformed roundly.
  • the lenticular lens includes all lenses having a curved cross-sectional shape, and the cross-sectional lens may be hemispherical, hyperbolic, or parabolic.
  • the lens structure 20 is not limited thereto, but the pitch is preferably about 15 ⁇ m to 80 ⁇ m, the height is preferably 5 ⁇ m to 40 ⁇ m. If the pitch is less than 15 ⁇ m, the brightness decreases due to the increase of the valley portion of the film per unit area, and difficulty in manufacturing the mold occurs due to the limitation of the precision of the shape processing. In addition, when the pitch exceeds 100 ⁇ m, the possibility of moiré between the lens structure and the panel becomes very large. In addition, when the height of the lens structure is about 30 to 50% of the lens pitch, more specifically, when the 5 ⁇ m to 40 ⁇ m, it is possible to implement the desirable light collecting performance.
  • the first protrusion 30 and the second protrusion 40 are formed on the lens structure 20 to prevent the films from being in close contact by serving as spacers between the films.
  • the first protrusion 30 is formed of a plurality of protrusions 32 arranged along the extending direction of the lens structure
  • the second protrusion 40 is along a direction having a predetermined angle with respect to the extending direction of the lens structure. It consists of a plurality of protrusions 42 arranged.
  • the angle ⁇ between the extending direction of the lens structure and the protrusion arrangement direction of the second protrusion is preferably about 10 ° ⁇ ⁇ ⁇ 40 °, more preferably about 15 ° ⁇ ⁇ ⁇ 25 °. This is because the moiré reduction effect can be maximized when the ⁇ value is in the above range.
  • the protrusions 32 constituting the first protrusion part 30 are arranged to have a constant interval between adjacent protrusions, and more specifically, to satisfy the following equation (1). It is preferable.
  • Equation (1) P 1, x is an interval between adjacent protrusions of the first protrusion measured along the direction perpendicular to the extension direction of the lens structure, P 1, y is along the extension direction of the lens structure The distance between adjacent protrusions of the measured first protrusion, P L is the lens structure pitch, and n 1 is an integer of 1 or more.
  • n 1 is preferably about 3 to 7, more preferably about 4 to 6.
  • n 1 is 2 or less, the brightness of the light collecting film may be lowered, and when 8 or more, the adhesion performance may be significantly reduced.
  • the protrusions 42 constituting the second protrusion 40 are arranged such that the interval between neighboring protrusions is constant, and more specifically, the following equations (2) and equations It is preferable to arrange so as to satisfy (3).
  • P 2 and x are intervals between adjacent protrusions of the second protrusion measured along the direction perpendicular to the arrangement direction of the second protrusion, and P 1 and y are second.
  • the distance between adjacent protrusions of the second protrusion measured along the arrangement direction of the protrusion, P L is the lens structure pitch, n 2, y is an integer, n 2, x is n 2, the closest to y / tan ⁇ Is an integer, and ⁇ is an angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
  • the second projection is formed to satisfy the formula (4) 5 ⁇ n 2, y / sin ⁇ 18.
  • n 2, y is an integer
  • ⁇ means the angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
  • the diameter of the protrusions of the first and second protrusions is preferably about 0.1 to 0.6 times the diameter of the lens structure pitch (P L ).
  • the diameter of the projections is preferably about 5 to 30 ⁇ m, and most preferably about 12 ⁇ m. This is because when the diameter of the protrusion is less than 0.1 times the pitch of the lens structure, the adhesion preventing effect is insignificant, and when the diameter of the protrusion is more than 0.6 times, problems in formability and stability may occur.
  • the height of the protrusions of the first protrusion and the second protrusion is preferably about 0.1 to 1 times the diameter of the protrusion. If the height of the projections is less than 0.1 times the diameter of the projections, the effect of preventing adhesion is insignificant, and if it exceeds 1 times, there is a problem that molding is difficult. More specifically, the height of the projections is preferably 1 to 20 ⁇ m, preferably about 1.5 to 10 ⁇ m.
  • the light collecting film of the present invention as described above for example, the lens structure and the projection shape can be produced by injecting the curable resin into the mold engraved, and cured.
  • the shape of the lens structure may be engraved through a conventional method for forming a lens structure well known in the art, for example, mechanical cutting, photoresist reflow method, bead coating, laser etching, etc.
  • the shape of the protrusion may be engraved by a method of additionally processing the protrusion shape through a bite processing, a laser processing, or the like on a mold in which the lens structure shape is engraved.
  • the shape of the protrusion is preferably formed by laser processing.
  • laser processing is very precise, it is not only suitable for forming a fine structure such as the projection of the present invention, but also starts processing after touching the etching surface, so that even if a three-dimensional shape such as a lens structure is present on the mold surface, the depth from the curved surface may be increased. There is an advantage that can give a uniform secondary shape.
  • the optical system it is possible to adjust the etching shape, area and depth of the metal for each pulse, which enables free point processing and precisely forms protrusions at desired positions.
  • the light converging film of the present invention is not limited thereto, but for example, the first projection is first engraved in a mold in which the lens structure is engraved, and then the bite advancing direction or the laser advancing direction is changed to the second. After engraving the protrusion to form a mold, the curable resin may be injected and cured.
  • the light collecting film of the present invention manufactured by the above method is applied to the backlight unit, and exhibits an excellent adhesion preventing effect and a moiré preventing effect, and as a result, excellent image quality can be realized.
  • the light collecting film of the present invention can be used regardless of the type of backlight unit. That is, the edge type backlight having the light source positioned on the side of the display panel and the direct type backlight unit positioned on the bottom surface of the display panel may be used.
  • 3 and 4 illustrate embodiments of a backlight unit equipped with the light collecting film of the present invention.
  • the backlight unit of the present invention includes a light source 100; A light guide plate 200 disposed at a side of the light source and controlling a path of light emitted from the light source; And the light collecting film 1 of the present invention disposed on the light guide plate.
  • the backlight unit of the present invention as shown in Figure 4, the light source 100; A diffusion plate 300 disposed above the light source 100 and diffusing the light emitted from the light source; And the light collecting film 1 of the present invention disposed on the diffusion plate.
  • the backlight unit of the present invention may further include a diffusion film 400 for hiding the light source on the upper and / or lower portion of the light collecting film (1).
  • the light collecting film 1 may further include a protective film for protecting the lens structure.
  • the backlight unit of the present invention may include two or more light collecting films as necessary.
  • the backlight unit of the present invention can be usefully mounted to a display device such as a liquid crystal display device.
  • the first and second protrusions were engraved using a pulse laser, respectively.
  • the first protrusion is processed so that adjacent protrusions in the horizontal direction and the vertical direction are arranged along the extension direction of the lens structure with a spacing of 250 ⁇ m
  • the second protrusion is the alignment direction of the first protrusion (ie, the lens structure). It was processed so as to be aligned along the oblique direction inclined at 21 degrees with respect to the extension direction of ().
  • the spacing (P2, y) of the adjacent projections in the arrangement direction of the second projection portion was 418.56 ⁇ m
  • the spacing (P2, x) of the adjacent projections in the direction perpendicular to the arrangement direction was processed to be 428.46 ⁇ m.
  • a UV curable resin having a refractive index of 1.54 was added and cured to prepare a light collecting film.
  • the structure of the light collecting film prepared as above was as follows.
  • adjacent protrusions in the horizontal and vertical directions are spaced 200 ⁇ m using a pulse laser, and along the extension direction of the lens structure.
  • the protrusions were engraved to align.
  • a UV curable resin having a refractive index of 1.54 was added and cured to prepare a light collecting film.
  • the structure of the light collecting film prepared as above was as follows.
  • the cross-sectional shape of the lens structure a deformed prism having a curved surface ( curvature radius of 4 ⁇ m ) of the peak portion
  • the second projections are arranged along an oblique direction inclined by 5 ° with respect to the arrangement direction of the first projection (that is, the direction in which the lens structure extends), and the distance between adjacent projections in the arrangement direction of the second projection.
  • (P 2, y) is 573.69 ⁇ m
  • the spacing of adjacent protrusions in the direction perpendicular to the array direction (P 2, x) is condensed film in the same manner as in example 1 except that a processing such that the 551.10 ⁇ m Was prepared.
  • the second protrusions are arranged along an oblique direction inclined at 45 ° with respect to the alignment direction of the first protrusion (that is, the direction of extension of the lens structure), and the distance between adjacent protrusions in the alignment direction of the second protrusion.
  • (P 2, y) is 494.97 ⁇ m
  • the spacing of adjacent protrusions in the direction perpendicular to the array direction (P 2, x) is condensed film in the same manner as in example 1 except that a processing such that the 494.97 ⁇ m Was prepared.
  • the intervals P 2 and y of adjacent protrusions in the arrangement direction of the second protrusions are 139.52 ⁇ m, and the intervals P 2 and x of adjacent protrusions in the direction perpendicular to the alignment direction are 160.67 ⁇ m.
  • the light condensing film was manufactured by the method similar to Example 1.
  • the spacing P 2, y of adjacent protrusions in the arrangement direction of the second protrusion is 976.65 ⁇ m
  • the spacing P 2, x of adjacent protrusions in the direction perpendicular to the arrangement direction is 964.03 ⁇ m.
  • the light condensing film was manufactured by the method similar to Example 1.
  • Each of the light collecting films manufactured by Examples and Comparative Examples 1 to 7 was disposed to be orthogonal to each other on the light guide plate of the backlight unit.
  • orthogonal means that the extending directions of the lens structures of the light collecting film are arranged to be perpendicular to each other. Then, the LCD panel was put on it, and the moiré was observed by visual observation.
  • the LCD panel was used 26 inches, 32 inches and 37 inches FHD (full HD), respectively.
  • the pixels in the on state and the pixels in the off state alternately appear, such as a “white mode” and a check pattern in which all pixels are on.
  • “1 dot mod” “one-line vertical mode” in which adjacent pixel columns in the on state and pixel columns in the off state alternate, like a vertical stripe pattern.
  • 1 line vertical mode “ 1 line horizontal mode ”in which adjacent pixel rows in the on state and pixel rows in the off state appear alternately like a horizontal stripe pattern. In all four modes. The measurement results are shown in Table 1.
  • Each of the light collecting films manufactured by Examples and Comparative Examples 1 to 7 was disposed to be orthogonal to each other on the light guide plate of the backlight unit.
  • orthogonal means that the extending directions of the lens structures of the light collecting film are arranged to be perpendicular to each other.
  • luminance of the center position of the condensing film front surface was measured.
  • Topcon BM7 TM was used as the luminance measuring device, and when the luminance of the example was regarded as a reference (100%), it was represented as a relative luminance value of Comparative Examples 1-7. The measurement results are shown in Table 1.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to a light-condensing film comprising: a plurality of lens structures extending in one direction on one surface thereof; a first protrusion unit which includes a plurality of protrusions formed on the lens structures, and which is arranged in the same direction as the extending direction of the lens structures; and a second protrusion unit which includes a plurality of protrusions formed on the lens structures, and which is arranged in a direction having a predetermined angle with respect to the extending direction of the lens structures. The present invention also relates to a backlight unit comprising the film, and to a display device comprising the backlight unit.

Description

밀착 방지 성능 및 모아레 방지 효과가 우수한 집광 필름, 이를 포함하는 백라이트 유닛 및 디스플레이 장치 Condensing film excellent in adhesion prevention and moiré prevention effect, backlight unit and display device including the same
본 발명은 집광 필름 및 이를 포함하는 백라이트 유닛 및 디스플레이 장치에 관한 것으로, 보다 상세하게는 필름 간의 밀착 방지 성능 및 모아레 방지 성능이 우수한 집광 필름 및 이를 포함하는 백라이트 및 디스플레이 장치에 관한 것이다.The present invention relates to a light collecting film, and a backlight unit and a display device including the same, and more particularly, to a light collecting film and a backlight and a display device including the same excellent in adhesion preventing and moiré prevention between the film.
액정표시장치(Liquid Crystal Display, LCD)는 일반적으로 공통 전극과 색필터 등이 형성되어 있는 상부 기판과 박막 트랜지스터와 화소 전극 등이 형성되어 있는 하부 기판 사이에 액정 물질을 주입하고, 화소 전극과 공통 전극에 서로 다른 전위를 인가함으로써 전계를 형성하여 액정 분자들의 배열을 변경시키고, 이를 통해 빛의 투과율을 조절하여 화상을 표현하는 장치이다.In general, a liquid crystal display (LCD) injects a liquid crystal material between an upper substrate on which a common electrode and a color filter are formed, and a lower substrate on which a thin film transistor and a pixel electrode are formed. By applying different potentials to the electrodes to form an electric field to change the arrangement of the liquid crystal molecules, thereby adjusting the transmittance of light to express the image.
이러한 액정표시장치는 스스로 발광하지 못하는 수광 소자이기 때문에, 광을 공급하기 위한 백라이트 유닛이 필요하다. 일반적으로 백라이트 유닛은 빛을 공급하는 광원과 선 광원 또는 점 광원 등을 면 광원으로 전환시키기 위한 확산판 또는 도광판 및 광 성능을 향상시키기 위한 다수의 광학 필름들로 이루어진다. 백라이트 유닛에 사용되는 광학 필름에는 빛을 정면 방향으로 편향시켜 휘도를 향상시키는 집광 필름, 백라이트 배면의 결함이나 광원의 휘선을 은폐하는 기능을 수향하는 확산 필름 및 외부 충격 등으로부터 광학 필름들을 보호하기 위한 보호 필름 등이 있다. Since the liquid crystal display is a light receiving element that does not emit light by itself, a backlight unit for supplying light is required. In general, the backlight unit includes a light source for supplying light, a diffusion plate or a light guide plate for converting a line light source or a point light source, and the like into a surface light source, and a plurality of optical films for improving light performance. The optical film used in the backlight unit includes a condensing film that improves brightness by deflecting light in the front direction, a diffusion film that deflects defects on the back surface of the backlight, and a function of concealing the bright lines of the light source. Protective films;
한편, 일반적으로 상기 집광 필름과 확산 필름, 보호 필름 등은 서로 적층되어 사용되는데, 적층된 필름끼리 밀착(블로킹)되면서 표면 결함을 유발한다는 문제점이 있다. 도 1에는 집광 필름 상에 보호 필름을 적층했을 때 나타나는 웨트-아웃 현상 및 밀착(블로킹) 현상이 나타나있다. 이러한 필름 밀착에 의한 결함이 발생할 경우, 표시장치의 화질이 저하되기 때문에 이를 개선할 필요가 있다. 필름 간 밀착 방지를 위해서 렌티큘러 렌즈나 프리즘 렌즈 구조물을 갖는 집광 필름의 피크(peak)부에 일정한 간격으로 돌기부를 형성하는 기술이 제안되었다. 그러나, 이 경우, 필름 밀착은 방지할 수 있으나, 렌즈 구조물과 돌기부에 의한 모아레가 심해져 화상 품질이 떨어진다는 문제점이 있다. 한편, 돌기부를 불규칙하게 형성할 경우 이러한 모아레가 일부 개선될 수 있으나, 렌즈 구조물 상에 불규칙한 돌기부가 형성된 금형을 제조하는 것을 기술적으로 매우 어렵다. 일반적으로 렌티큘러 렌즈나 프리즘과 같은 집광필름은 표면 형태가 음각된 금형을 통해 제조되며, 상기 음각은 바이트 가공 등을 통해 이루어진다. 따라서, 돌기부가 불규칙하게 배열된 집광 필름을 제조하기 위해서는, 바이트 가공 시에 주파수(frequency)를 불규칙하게 제어하여야 하는데, 금형 가공이 고속 회전 상태에서 이루어지기 때문에 이러한 제어가 매우 어렵다.On the other hand, in general, the light condensing film, the diffusion film, the protective film and the like are laminated to each other, there is a problem in that the laminated film is in close contact (blocking) causing surface defects. 1 shows the wet-out phenomenon and the adhesion (blocking) phenomenon that appear when the protective film is laminated on the light collecting film. When a defect due to the film adhesion occurs, it is necessary to improve the quality of the display device because it is deteriorated. In order to prevent adhesion between films, a technique of forming protrusions at regular intervals on a peak portion of a light collecting film having a lenticular lens or a prism lens structure has been proposed. However, in this case, the film can be prevented from adhering to each other, but there is a problem in that the moire due to the lens structure and the protrusion is severe and the image quality is degraded. On the other hand, when the irregularly formed protrusions may be partially improved such moire, it is technically very difficult to manufacture a mold formed with irregular protrusions on the lens structure. In general, a condensing film such as a lenticular lens or a prism is manufactured through a mold having an engraved surface shape, and the engraving is performed through a bite processing or the like. Therefore, in order to produce a light collecting film having irregularly arranged protrusions, it is necessary to irregularly control a frequency during bite processing, which is very difficult because mold processing is performed at a high speed rotation state.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 필름 밀착 방지와 모아레 방지를 동시에 수행할 수 있는 집광 필름, 이를 포함하는 백라이트 유닛 및 디스플레이 장치를 제공한다.The present invention is to solve the above problems, and provides a light collecting film, a backlight unit and a display device including the same that can perform film adhesion prevention and moire prevention at the same time.
이를 위해 본 발명은, 일 측면에서, 일면에 일 방향으로 연장된 다수의 렌즈 구조물을 포함하며, 상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향과 동일한 방향을 따라 배열되는 다수의 돌기들로 이루어진 제1돌기부; 및 상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향에 대하여 일정한 각도를 갖는 방향을 따라 배열되는 다수의 돌기들로 이루어진 제2돌기부를 포함하는 집광 필름을 제공한다.To this end, the present invention, in one aspect, includes a plurality of lens structures extending in one direction on one surface, formed on the lens structure, a plurality of protrusions arranged along the same direction as the extension direction of the lens structure The first protrusion consisting of; And a second protrusion formed on the lens structure and including a plurality of protrusions arranged along a direction having a predetermined angle with respect to an extension direction of the lens structure.
다른 측면에서, 본 발명은 광원; 상기 광원의 측면에 배치되며, 상기 광원으로부터 출사된 빛의 경로를 제어하는 도광판; 및 상기 도광판 상부에 배치되는 본 발명의 집광 필름을 포함하는 백라이트 유닛을 제공한다.In another aspect, the invention provides a light source; A light guide plate disposed at a side of the light source and controlling a path of light emitted from the light source; And it provides a backlight unit comprising a light collecting film of the present invention disposed on the light guide plate.
또 다른 측면에서, 본 발명은 광원; 상기 광원의 상부에 배치되며, 상기 광원으로부터 출사된 빛을 확산시키는 확산판; 및 상기 확산판 상부에 배치되는 본 발명의 집광 필름을 포함하는 백라이트 유닛을 제공한다.In another aspect, the invention provides a light source; A diffuser plate disposed above the light source and configured to diffuse light emitted from the light source; And it provides a backlight unit comprising a light collecting film of the present invention disposed on the diffusion plate.
또 다른 측면에서, 본 발명은 상기 백라이트 유닛을 포함하는 디스플레이 장치를 제공한다. In another aspect, the present invention provides a display device including the backlight unit.
본 발명의 집광 필름은 필름 밀착을 방지함으로써, 웨트-아웃이나 표면 결함이 발생하는 것을 억제할 수 있으며, 모아레 방지 효과가 우수하여, 우수한 화질을 구현할 수 있다는 장점이 있다.The light collecting film of the present invention can prevent the adhesion of the film, and can prevent the occurrence of wet-out or surface defects, has an advantage of excellent moiré prevention effect, it is possible to implement excellent image quality.
또한, 본 발명의 집광 필름은 제조 방법이 단순하여 생산성이 우수하고, 재현성이 우수하여 균일한 제품 품질을 구현할 수 있다. In addition, the light collecting film of the present invention can realize a uniform product quality due to its simple manufacturing method and excellent productivity and excellent reproducibility.
도 1은 집광 필름 상에 보호 필름을 적층했을 때 나타나는 웨트-아웃 현상 및 밀착(블로킹) 현상을 보여주는 도면이다.1 is a view showing the wet-out phenomenon and the adhesion (blocking) phenomenon when the protective film is laminated on the light collecting film.
도 2는 본 발명의 집광 필름의 일 실시예를 보여주는 도면이다.2 is a view showing an embodiment of a light collecting film of the present invention.
도 3은 본 발명의 백라이트 유닛의 일 실시예를 보여주는 도면이다.3 is a diagram illustrating an embodiment of a backlight unit of the present invention.
도 4는 본 발명의 백라이트 유닛의 다른 실시예를 보여주는 도면이다. 4 is a view showing another embodiment of the backlight unit of the present invention.
<부호의 설명><Description of the code>
1 : 집광필름1: condensing film
20 : 렌즈 구조물20: lens structure
30 : 제1돌기부30: first projection
40 : 제2돌기부40: second projection
100 : 광원100: light source
200 : 도광판200: light guide plate
300 : 확산판300: diffuser plate
400 : 확산필름400: diffusion film
이하, 첨부된 도면들을 참조하여 본 발명의 다양한 실시예를 설명하기로 한다. 다만, 첨부된 도면들은 본 발명의 다양한 실시예들을 설명하기 위한 예시에 불과한 것으로, 본 발명의 범위가 하기 도면에 의해 한정되는 것은 아니다. 또한, 본 발명에 대한 효과적인 설명을 위해, 각 도면의 크기 및 비율이 과장되게 표현될 수 있다. Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, the accompanying drawings are only examples for describing various embodiments of the present invention, and the scope of the present invention is not limited by the following drawings. In addition, in order to explain the present invention effectively, the size and ratio of each drawing may be exaggerated.
본 발명자들은 모아레 현상 없이 필름 간 밀착을 방지할 수 있는 집광 필름을 개발하기 위해 연구를 거듭한 결과, 렌즈 구조물의 연장 방향과 동일한 방향으로 배열된 돌기부와 렌즈 구조물의 연장 방향에 대하여 사선 방향으로 배열된 돌기부를 갖는 본 발명의 집광 필름을 개발하였다.The present inventors have conducted research to develop a condensing film that can prevent adhesion between films without moiré, and as a result, the projections arranged in the same direction as the extending direction of the lens structure and the extending direction of the lens structure are arranged in an oblique direction. The light condensing film of the present invention having the formed protrusions was developed.
도 1에는 본 발명의 집광 필름의 일 실시예가 도시되어 있다.1 shows an embodiment of the light collecting film of the present invention.
도 1에 도시된 바와 같이, 본 발명의 집광 필름(1)은 배열 방향이 다른 2개의 돌기부(30, 40)를 렌즈 구조물(20)의 상부에 형성함으로써, 필름 간 밀착을 효과적으로 방지하면서도 모아레를 최소할 수 있도록 설계되었다. 또한, 본 발명의 집광 필름은 각각의 돌기부들이 규칙적인 배열을 갖기 때문에, 필름용 금형 가공 시에 주파수(frequency)를 변화시킬 필요가 없어 제조가 용이하고, 제품 재현성이 우수하여 일정한 품질을 유지할 수 있다.As shown in FIG. 1, the light collecting film 1 of the present invention forms two projections 30 and 40 having different arrangement directions on the lens structure 20, thereby preventing moiré while effectively preventing adhesion between films. It is designed to be minimal. In addition, the light condensing film of the present invention has a regular arrangement, so that it is not necessary to change the frequency during the film processing, so that the manufacturing is easy and the product reproducibility is excellent, so that the constant quality can be maintained. have.
보다 구체적으로는, 본 발명의 집광 필름(1)은 일면에 일 방향으로 연장된 다수의 렌즈 구조물(20)을 포함하며, 상기 렌즈 구조물(20) 위에 서로 다른 배열 방향을 갖는 제1돌기부(30) 및 제2돌기부(40)를 포함한다.More specifically, the light collecting film 1 of the present invention includes a plurality of lens structures 20 extending in one direction on one surface thereof, and the first protrusions 30 having different arrangement directions on the lens structures 20. ) And the second protrusion 40.
상기 렌즈 구조물(20)은 광원에서 출사된 빛을 일정한 방향으로 편향시켜 가시청 범위의 휘도를 향상시키기 위한 것으로, 예를 들면, 일 방향으로 연장된 프리즘 렌즈, 렌티큘러 렌즈 또는 이들의 조합일 수 있다. 한편, 상기 프리즘 렌즈에는 단면이 삼각형상인 렌즈뿐 아니라, 렌즈 피크 부분이 둥글게 변형된 변형 프리즘이 포함된다. 또한, 상기 렌티큘러 렌즈는 단면 형상이 곡선 형상인 렌즈를 모두 포함하는 것으로, 그 단면은 반구형, 쌍곡선형, 포물선 형일 수 있다.The lens structure 20 is to improve the luminance of the visible range by deflecting the light emitted from the light source in a predetermined direction. For example, the lens structure 20 may be a prism lens, a lenticular lens, or a combination thereof extending in one direction. . Meanwhile, the prism lens includes not only a lens having a triangular cross section, but a deformed prism in which the lens peak portion is deformed roundly. In addition, the lenticular lens includes all lenses having a curved cross-sectional shape, and the cross-sectional lens may be hemispherical, hyperbolic, or parabolic.
한편, 상기 렌즈 구조물(20)은, 이로써 한정되는 것은 아니나, 그 피치가 15㎛ 내지 80㎛ 정도이고, 높이가 5㎛ 내지 40㎛ 정도인 것이 바람직하다. 피치가 15㎛ 미만인 경우에는, 단위면적당 필름의 골 부분의 증가로 인하여 휘도 저하가 심해지며, 형상가공의 정밀도의 한계로 인해서 금형 제작에 어려움이 발생된다. 또한 피치가 100㎛를 초과하는 경우에는 렌즈구조물과 패널간의 모아레 발생 가능성이 매우 커지게 된다. 또한, 렌즈구조물의 높이가 렌즈 피치의 30 ~ 50% 정도일 때, 보다 구체적으로는, 5㎛ 내지 40㎛일 때, 바람직한 집광 성능을 구현할 수 있다.On the other hand, the lens structure 20 is not limited thereto, but the pitch is preferably about 15㎛ to 80㎛, the height is preferably 5㎛ to 40㎛. If the pitch is less than 15 μm, the brightness decreases due to the increase of the valley portion of the film per unit area, and difficulty in manufacturing the mold occurs due to the limitation of the precision of the shape processing. In addition, when the pitch exceeds 100 μm, the possibility of moiré between the lens structure and the panel becomes very large. In addition, when the height of the lens structure is about 30 to 50% of the lens pitch, more specifically, when the 5㎛ to 40㎛, it is possible to implement the desirable light collecting performance.
한편, 상기 제1돌기부(30) 및 제2돌기부(40)는 렌즈 구조물(20) 상부에 형성되어, 필름들 사이에서 스페이서 역할을 수행하여 필름들이 밀착되는 것을 방지하기 위한 것으로, 본 발명에 있어서는, 상기 제1돌기부(30)는 렌즈 구조물의 연장 방향을 따라 배열되는 다수의 돌기들(32)로 이루어지고, 제2돌기부(40)는 렌즈 구조물의 연장 방향에 대하여 일정한 각도를 갖는 방향을 따라 배열되는 다수의 돌기들(42)로 이루어진다.Meanwhile, the first protrusion 30 and the second protrusion 40 are formed on the lens structure 20 to prevent the films from being in close contact by serving as spacers between the films. The first protrusion 30 is formed of a plurality of protrusions 32 arranged along the extending direction of the lens structure, and the second protrusion 40 is along a direction having a predetermined angle with respect to the extending direction of the lens structure. It consists of a plurality of protrusions 42 arranged.
이와 같이, 배열 방향이 상이한 2개의 돌기부를 구비할 경우, 돌기부의 규칙성이 완화될 뿐 아니라, 각각의 돌기부에 의해 발생되는 간섭 패턴들이 겹쳐지면서 상쇄되어 모아레가 감소하는 효과가 발생한다. As described above, when the two projections having different arrangement directions are provided, not only the regularity of the projections is alleviated, but the interference patterns generated by the projections are overlapped and canceled so that the moiré is reduced.
이때, 상기 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도 θ는 10°≤θ≤40°정도인 것이 바람직하며, 더 바람직하게는 15°≤θ≤25°정도이다. θ 값이 상기 범위에 있을 때, 모아레 감소 효과가 극대화될 수 있기 때문이다.In this case, the angle θ between the extending direction of the lens structure and the protrusion arrangement direction of the second protrusion is preferably about 10 ° ≦ θ ≦ 40 °, more preferably about 15 ° ≦ θ ≦ 25 °. This is because the moiré reduction effect can be maximized when the θ value is in the above range.
본 발명에 있어서, 상기 제1돌기부(30)를 구성하는 돌기(32)들은 인접한 돌기들 사이의 간격이 일정하도록 배열되는 것이 바람직하며, 보다 구체적으로는, 하기 식 (1)을 만족하도록 배열되는 것이 바람직하다.In the present invention, it is preferable that the protrusions 32 constituting the first protrusion part 30 are arranged to have a constant interval between adjacent protrusions, and more specifically, to satisfy the following equation (1). It is preferable.
식 (1): P1,x = P1,y = n1×PL Equation (1): P 1, x = P 1, y = n 1 × P L
상기 식 (1)에서, P1, x는 렌즈 구조물의 연장 방향에 대해 수직한 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이며, P1, y는 렌즈 구조물의 연장 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이고, PL은 렌즈 구조물 피치이며, n1은 1 이상의 정수이다. In Equation (1), P 1, x is an interval between adjacent protrusions of the first protrusion measured along the direction perpendicular to the extension direction of the lens structure, P 1, y is along the extension direction of the lens structure The distance between adjacent protrusions of the measured first protrusion, P L is the lens structure pitch, and n 1 is an integer of 1 or more.
특히, 상기 n1은 3 내지 7 정도인 것이 바람직하며, 더 바람직하게는 4 내지 6 정도인 것이 좋다. n1이 2 이하인 경우에는 집광 필름의 휘도가 저하될 수 있으며, 8 이상인 경우에는 밀착 성능이 현저히 감소할 수 있기 때문이다.In particular, the n 1 is preferably about 3 to 7, more preferably about 4 to 6. When n 1 is 2 or less, the brightness of the light collecting film may be lowered, and when 8 or more, the adhesion performance may be significantly reduced.
또한, 본 발명에 있어서, 상기 제2돌기부(40)를 구성하는 돌기(42)들은 이웃한 돌기들 사이의 간격이 일정하도록 배열되는 것이 바람직하며, 보다 구체적으로는, 하기 식 (2) 및 식 (3)을 만족하도록 배열되는 것이 바람직하다.In addition, in the present invention, it is preferable that the protrusions 42 constituting the second protrusion 40 are arranged such that the interval between neighboring protrusions is constant, and more specifically, the following equations (2) and equations It is preferable to arrange so as to satisfy (3).
식 (2): P2, x = (n2, x ×PL) / cosθEquation (2): P 2, x = (n 2, x × P L ) / cosθ
식 (3): P2, y= (n2, y ×PL) / sinθEquation (3): P 2, y = (n 2, y × P L ) / sinθ
상기 식 (2) 및 식 (3)에서, P2, x는 제2돌기부의 배열 방향에 수직한 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이며, P1, y는 제2돌기부의 배열 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이고, PL은 렌즈 구조물 피치이며, n2, y는 정수이며, n2, x는 n2, y/tanθ에 가장 가까운 정수이며, θ는 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도이다.In the above formulas (2) and (3), P 2 and x are intervals between adjacent protrusions of the second protrusion measured along the direction perpendicular to the arrangement direction of the second protrusion, and P 1 and y are second. The distance between adjacent protrusions of the second protrusion measured along the arrangement direction of the protrusion, P L is the lens structure pitch, n 2, y is an integer, n 2, x is n 2, the closest to y / tanθ Is an integer, and θ is an angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
한편, 상기 제2돌기부는 식 (4) 5≤ n2, y/sinθ≤18을 만족하도록 형성되는 것이 더욱 바람직하다. 이때, 상기 식 (4)에서, n2, y는 정수이며, θ는 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도를 의미한다.On the other hand, it is more preferable that the second projection is formed to satisfy the formula (4) 5≤n 2, y / sinθ≤18. At this time, in the formula (4), n 2, y is an integer, θ means the angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
한편, 본 발명에 있어서, 상기 제1돌기부 및 제2돌기부의 돌기들은 그 직경이 렌즈 구조물 피치(PL)의 0.1 내지 0.6배 정도인 것이 바람직하다. 예를 들어, 렌즈 구조물의 피치가 50㎛ 정도라면, 돌기의 직경은 5 ~ 30㎛ 정도인 것이 바람직하며, 가장 바람직하게는 약 12㎛ 정도인 것이 좋다. 돌기의 직경이 렌즈 구조물 피치의 0.1배 미만인 경우에는 밀착 방지 효과가 미미하고, 0.6 배를 초과할 경우에는 성형성 및 안정성에 문제가 발생할 수 있기 때문이다.On the other hand, in the present invention, the diameter of the protrusions of the first and second protrusions is preferably about 0.1 to 0.6 times the diameter of the lens structure pitch (P L ). For example, if the pitch of the lens structure is about 50 μm, the diameter of the projections is preferably about 5 to 30 μm, and most preferably about 12 μm. This is because when the diameter of the protrusion is less than 0.1 times the pitch of the lens structure, the adhesion preventing effect is insignificant, and when the diameter of the protrusion is more than 0.6 times, problems in formability and stability may occur.
또한, 본 발명에 있어서, 상기 제1돌기부 및 제2돌기부의 돌기들의 높이는 돌기 직경의 0.1 내지 1배 정도인 것이 바람직하다. 돌기의 높이가 돌기 직경의 0.1배 미만인 경우에는 밀착 방지 효과가 미미하며, 1배를 초과할 경우에는 성형이 어렵다는 문제점이 있기 때문이다. 보다 구체적으로는, 상기 돌기의 높이는 1 내지 20㎛, 바람직하게는 1.5 내지 10㎛ 정도인 것이 바람직하다. In addition, in the present invention, the height of the protrusions of the first protrusion and the second protrusion is preferably about 0.1 to 1 times the diameter of the protrusion. If the height of the projections is less than 0.1 times the diameter of the projections, the effect of preventing adhesion is insignificant, and if it exceeds 1 times, there is a problem that molding is difficult. More specifically, the height of the projections is preferably 1 to 20 µm, preferably about 1.5 to 10 µm.
한편, 상기와 같은 본 발명의 집광 필름은 예를 들면, 렌즈 구조물 및 돌기 형상이 음각된 금형에 경화성 수지를 주입하고, 경화시킴으로써 제조될 수 있다. 이때, 상기 렌즈 구조물의 형상은 당해 기술 분야에 잘 알려진 종래의 렌즈 구조물 형성 방법, 예를 들면, 기계적 절삭, 포토레지스트 리플로우 방식, 비드 코팅, 레이저 식각 등의 방법 등을 통해 음각될 수 있으며, 상기 돌기부의 형상은 렌즈 구조물 형상이 음각된 금형 상에 바이트 가공, 레이저 가공 등을 통해 돌기 형상을 덧 가공하는 방법으로 음각될 수 있다. 특히 상기 돌기부의 형상은 레이저 가공을 통해 형성하는 것이 바람직하다. 레이저 가공은 매우 정밀하기 때문에 본 발명의 돌기와 같은 미세한 구조물을 형성하기에 적합할 뿐 아니라, 식각면에 닿은 후부터 가공을 시작하기 때문에, 금형 면에 렌즈 구조물과 같은 입체적 형상이 존재하더라도 굴곡면으로부터 깊이가 고른 이차 형상을 부여할 수 있다는 장점이 있다. 또한, 광학계를 조절하면 매 펄스당 금속의 식각 형상, 면적 및 깊이를 조절할 수 있어 자유로운 점가공이 가능할 뿐 아니라, 원하는 위치에 정확하게 돌기를 형성할 수 있다.On the other hand, the light collecting film of the present invention as described above, for example, the lens structure and the projection shape can be produced by injecting the curable resin into the mold engraved, and cured. In this case, the shape of the lens structure may be engraved through a conventional method for forming a lens structure well known in the art, for example, mechanical cutting, photoresist reflow method, bead coating, laser etching, etc. The shape of the protrusion may be engraved by a method of additionally processing the protrusion shape through a bite processing, a laser processing, or the like on a mold in which the lens structure shape is engraved. In particular, the shape of the protrusion is preferably formed by laser processing. Since laser processing is very precise, it is not only suitable for forming a fine structure such as the projection of the present invention, but also starts processing after touching the etching surface, so that even if a three-dimensional shape such as a lens structure is present on the mold surface, the depth from the curved surface may be increased. There is an advantage that can give a uniform secondary shape. In addition, by adjusting the optical system, it is possible to adjust the etching shape, area and depth of the metal for each pulse, which enables free point processing and precisely forms protrusions at desired positions.
보다 구체적으로는, 본 발명의 집광 필름은, 이로써 한정되는 것은 아니나, 예를 들면, 렌즈 구조물이 음각된 금형에 먼저 제1돌기부를 음각한 후, 바이트 진행 방향 또는 레이저 진행 방향을 변경하여 제2돌기부를 음각하여 금형을 형성한 후, 경화성 수지를 주입, 경화시키는 방법으로 제조될 수 있다. More specifically, the light converging film of the present invention is not limited thereto, but for example, the first projection is first engraved in a mold in which the lens structure is engraved, and then the bite advancing direction or the laser advancing direction is changed to the second. After engraving the protrusion to form a mold, the curable resin may be injected and cured.
상기와 같은 방법으로 제조된 본 발명의 집광 필름은 백라이트 유닛에 적용되어, 우수한 밀착 방지 효과 및 모아레 방지 효과를 나타내며, 그 결과 우수한 화질을 구현할 수 있도록 해준다.The light collecting film of the present invention manufactured by the above method is applied to the backlight unit, and exhibits an excellent adhesion preventing effect and a moiré preventing effect, and as a result, excellent image quality can be realized.
본 발명의 집광 필름은 백라이트 유닛의 종류와 무관하게 사용될 수 있다. 즉, 광원이 디스플레이 패널의 측면에 위치하는 엣지형 백라이트와 광원이 디스플레이 패널의 하면에 위치하는 직하형 백라이트 유닛에 모두 사용될 수 있다. The light collecting film of the present invention can be used regardless of the type of backlight unit. That is, the edge type backlight having the light source positioned on the side of the display panel and the direct type backlight unit positioned on the bottom surface of the display panel may be used.
도 3 및 도 4에는 본 발명의 집광 필름을 장착한 백라이트 유닛의 실시예들이 기재되어 있다.3 and 4 illustrate embodiments of a backlight unit equipped with the light collecting film of the present invention.
도 3에 도시된 바와 같이, 본 발명의 백라이트 유닛은 광원(100); 상기 광원의 측면에 배치되며, 상기 광원으로부터 출사된 빛의 경로를 제어하는 도광판(200); 및 상기 도광판 상부에 배치되는 본 발명의 상기 집광 필름(1)을 포함한다. As shown in FIG. 3, the backlight unit of the present invention includes a light source 100; A light guide plate 200 disposed at a side of the light source and controlling a path of light emitted from the light source; And the light collecting film 1 of the present invention disposed on the light guide plate.
또한, 본 발명의 백라이트 유닛은, 도 4에 도시된 바와 같이, 광원(100); 상기 광원(100)의 상부에 배치되며, 상기 광원으로부터 출사된 빛을 확산시키는 확산판(300); 및 상기 확산판 상부에 배치되는 본 발명의 상기 집광 필름(1)을 포함한다.In addition, the backlight unit of the present invention, as shown in Figure 4, the light source 100; A diffusion plate 300 disposed above the light source 100 and diffusing the light emitted from the light source; And the light collecting film 1 of the present invention disposed on the diffusion plate.
한편, 상기한 본 발명의 백라이트 유닛은 집광 필름(1)의 상부 및/또는 하부에 광원 은폐 등을 위한 확산 필름(400)을 추가로 포함할 수 있다. 또한, 도시되지는 않았으나, 상기 집광 필름(1) 상부에 렌즈 구조물을 보호하기 위한 보호 필름을 추가로 포함할 수도 있다. On the other hand, the backlight unit of the present invention may further include a diffusion film 400 for hiding the light source on the upper and / or lower portion of the light collecting film (1). In addition, although not shown, the light collecting film 1 may further include a protective film for protecting the lens structure.
또한, 도 3 및 도 4에는 집광 필름이 1개 사용된 것으로 도시되어 있으나, 본 발명의 백라이트 유닛의 경우, 필요에 따라, 2 이상의 집광 필름을 포함할 수 있다.In addition, although one light collecting film is used in FIGS. 3 and 4, the backlight unit of the present invention may include two or more light collecting films as necessary.
한편, 상기한 본 발명의 백라이트 유닛은 액정표시장치와 같은 디스플레이 장치에 장착되어 유용하게 사용될 수 있다. On the other hand, the backlight unit of the present invention can be usefully mounted to a display device such as a liquid crystal display device.
이하, 구체적인 실시예를 통해 본 발명의 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to specific examples.
실시예 1Example 1
롤형 금형에 피크가 곡면인 프리즘 렌즈 형상을 가진 다이아몬드 바이트로 렌즈 구조물을 음각한 후, 펄스 레이저를 이용하여, 제1돌기부와 제2돌기부를 각각 음각하였다. 이때, 상기 제1돌기부는 수평 방향 및 수직 방향의 인접 돌기들이 250㎛의 간격을 가지고, 렌즈 구조물의 연장 방향을 따라 배열되도록 가공하였으며, 제2돌기부는 제1돌기부의 배열 방향(즉, 렌즈 구조물의 연장 방향)에 대하여 21°기울어진 사선 방향을 따라 배열되도록 가공하였다. 이때, 상기 제2돌기부의 배열 방향에 있어서 인접 돌기들의 간격(P2,y)이 418.56 ㎛, 배열 방향에 수직한 방향에 있어서 인접 돌기들의 간격(P2,x)은 428.46㎛이 되도록 가공하였다.After the lens structure was engraved with a diamond bite having a prism lens shape having a curved peak in a roll-shaped mold, the first and second protrusions were engraved using a pulse laser, respectively. In this case, the first protrusion is processed so that adjacent protrusions in the horizontal direction and the vertical direction are arranged along the extension direction of the lens structure with a spacing of 250 μm, and the second protrusion is the alignment direction of the first protrusion (ie, the lens structure). It was processed so as to be aligned along the oblique direction inclined at 21 degrees with respect to the extension direction of (). At this time, the spacing (P2, y) of the adjacent projections in the arrangement direction of the second projection portion was 418.56㎛, the spacing (P2, x) of the adjacent projections in the direction perpendicular to the arrangement direction was processed to be 428.46㎛.
상기와 같이 제조된 금형 PET 기재 사이에 굴절율이 1.54인 UV 경화형 수지 투입하고 경화시켜 집광 필름을 제조하였다.Between the mold PET substrate prepared as described above, a UV curable resin having a refractive index of 1.54 was added and cured to prepare a light collecting film.
상기와 같이 제조된 집광 필름의 구조는 다음과 같았다.The structure of the light collecting film prepared as above was as follows.
(1) 렌즈 구조물의 단면 형상 : 피크(peak) 부분의 곡면(곡률 반경: 4㎛)인 변형 프리즘(1) Cross-sectional shape of lens structure: deformed prism of curved surface (curvature radius: 4㎛) of peak part
(2) 렌즈 구조물 피치(PL): 50㎛(2) lens structure pitch (PL): 50 mu m
(3) 제1돌기부의 인접 돌기들 사이의 간격(P1,x = P1, y): 250㎛(3) spacing between adjacent protrusions of the first protrusion (P 1, x = P 1, y ): 250 μm
(4) 제1돌기부의 돌기들의 직경: 12 ㎛(4) Diameter of the projections of the first projection portion: 12 ㎛
(5) 제1돌기부의 돌기들의 높이: 6 ㎛ (5) Height of the projections of the first projection portion: 6 ㎛
(6) 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향간의 각도(θ): 21°(6) Angle (θ) between the extension direction of the lens structure and the projection arrangement direction of the second projection: 21 °
(7) 제2돌기부의 배열 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격 (P2, y): 418.56 ㎛(7) spacing between adjacent protrusions of the second protrusion measured along the arrangement direction of the second protrusion (P 2, y ): 418.56 μm
(8) 제2돌기부의 배열 방향에 수직한 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격 (P2, x): 428.46 ㎛(8) Spacing (P 2, x ) between adjacent protrusions of the second protrusion measured along the direction perpendicular to the direction in which the second protrusion is arranged: 428.46 μm
(9) 제2돌기부의 돌기들의 직경: 12 ㎛ (9) Diameter of the projections of the second projection: 12 μm
(10) 제2돌기부의 돌기들의 높이: 6 ㎛ (10) Height of the projections of the second projection: 6 μm
비교예 1Comparative Example 1
롤형 금형에 피크가 곡면인 프리즘 렌즈 형상을 가진 다이아몬드 바이트로 렌즈 구조물을 음각한 후, 펄스 레이저를 이용하여 수평 방향 및 수직 방향의 인접 돌기들이 200㎛의 간격을 가지고, 렌즈 구조물의 연장 방향을 따라 배열되도록 돌기부를 음각하였다. After engraving the lens structure with a diamond bite having a prism lens shape having a curved peak in a roll-shaped mold, adjacent protrusions in the horizontal and vertical directions are spaced 200 μm using a pulse laser, and along the extension direction of the lens structure. The protrusions were engraved to align.
상기와 같이 제조된 금형 PET 기재 사이에 굴절율이 1.54인 UV 경화형 수지 투입하고 경화시켜 집광 필름을 제조하였다.Between the mold PET substrate prepared as described above, a UV curable resin having a refractive index of 1.54 was added and cured to prepare a light collecting film.
상기와 같이 제조된 집광 필름의 구조는 다음과 같았다.The structure of the light collecting film prepared as above was as follows.
(1) 렌즈 구조물의 단면 형상: 피크(peak) 부분의 곡면(곡률 반경 4㎛)인 변형 프리즘(1) the cross-sectional shape of the lens structure: a deformed prism having a curved surface ( curvature radius of 4 μm ) of the peak portion
(2) 렌즈 구조물 피치(PL): 50㎛(2) lens structure pitch (PL): 50 mu m
(3) 돌기부의 인접 돌기들 사이의 간격: 200㎛(3) spacing between adjacent protrusions of the protrusion: 200 μm
(4) 돌기부의 돌기들의 직경: 12㎛(4) diameter of the projections of the projections: 12㎛
(5) 돌기부의 돌기들의 높이: 6㎛(5) the height of the projections of the projections: 6㎛
비교예 2Comparative Example 2
금형 제조 시에 제2돌기부를 제1돌기부의 배열 방향(즉, 렌즈 구조물의 연장 방향)에 대하여 5°기울어진 사선 방향을 따라 배열되도록 하고, 상기 제2돌기부의 배열 방향에 있어서 인접 돌기들의 간격(P2, y)이 573.69㎛, 배열 방향에 수직한 방향에 있어서 인접 돌기들의 간격(P2, x)은 551.10㎛이 되도록 가공한 점을 제외하고는, 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.At the time of manufacture of the mold, the second projections are arranged along an oblique direction inclined by 5 ° with respect to the arrangement direction of the first projection (that is, the direction in which the lens structure extends), and the distance between adjacent projections in the arrangement direction of the second projection. (P 2, y) is 573.69㎛, the spacing of adjacent protrusions in the direction perpendicular to the array direction (P 2, x) is condensed film in the same manner as in example 1 except that a processing such that the 551.10㎛ Was prepared.
비교예 3Comparative Example 3
금형 제조 시에 제2돌기부를 제1돌기부의 배열 방향(즉, 렌즈 구조물의 연장 방향)에 대하여 45°기울어진 사선 방향을 따라 배열되도록 하고, 상기 제2돌기부의 배열 방향에 있어서 인접 돌기들의 간격(P2, y)이 494.97㎛, 배열 방향에 수직한 방향에 있어서 인접 돌기들의 간격(P2, x)은 494.97㎛이 되도록 가공한 점을 제외하고는, 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.At the time of manufacture of the mold, the second protrusions are arranged along an oblique direction inclined at 45 ° with respect to the alignment direction of the first protrusion (that is, the direction of extension of the lens structure), and the distance between adjacent protrusions in the alignment direction of the second protrusion. (P 2, y) is 494.97㎛, the spacing of adjacent protrusions in the direction perpendicular to the array direction (P 2, x) is condensed film in the same manner as in example 1 except that a processing such that the 494.97㎛ Was prepared.
비교예 4Comparative Example 4
금형 제조 시에 제1돌기부를 인접 돌기들 사이의 간격을 100㎛(즉, n1=2)이 되도록 가공한 점을 제외하는 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.A light collecting film was manufactured in the same manner as in Example 1, except that the first protrusions were processed to have a spacing between adjacent protrusions of 100 μm (ie, n 1 = 2).
비교예 5Comparative Example 5
금형 제조 시에 제1돌기부를 인접 돌기들 사이의 간격을 500㎛(즉, n1=10)이 되도록 가공한 점을 제외하는 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.A light condensing film was manufactured in the same manner as in Example 1, except that the first projections were processed so that the interval between the adjacent projections was 500 μm (ie, n 1 = 10).
비교예6Comparative Example 6
금형 제조 시에, 제2돌기부의 배열 방향에 있어서 인접 돌기들의 간격(P2, y)이 139.52㎛, 배열 방향에 수직한 방향에 있어서 인접 돌기들의 간격(P2, x)은 160.67㎛이 되도록 가공한 점을 제외하고는, 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.In manufacturing the mold, the intervals P 2 and y of adjacent protrusions in the arrangement direction of the second protrusions are 139.52 μm, and the intervals P 2 and x of adjacent protrusions in the direction perpendicular to the alignment direction are 160.67 μm. Except for the point of processing, the light condensing film was manufactured by the method similar to Example 1.
비교예 7Comparative Example 7
금형 제조 시에, 제2돌기부의 배열 방향에 있어서 인접 돌기들의 간격(P2, y)이 976.65㎛, 배열 방향에 수직한 방향에 있어서 인접 돌기들의 간격(P2, x)은 964.03㎛이 되도록 가공한 점을 제외하고는, 실시예 1과 동일한 방법으로 집광 필름을 제조하였다.In manufacturing the mold, the spacing P 2, y of adjacent protrusions in the arrangement direction of the second protrusion is 976.65 μm, and the spacing P 2, x of adjacent protrusions in the direction perpendicular to the arrangement direction is 964.03 μm. Except for the point of processing, the light condensing film was manufactured by the method similar to Example 1.
실험예 1 -밀착 방지 효과 측정 Experimental Example 1-Measurement of adhesion prevention effect
상기 실시예 및 비교예 1 ~7에 의해 제조된 집광 필름 위에 PET 필름을 적층한 후, 그 위에 5kgf/cm2의 하중 추를 올려 놓고, 온도 85°C, 습도 95% 조건 하에서 24시간 동안 방치하였다. 24시간이 경과한 뒤, 집광필름과 PET 필름의 밀착여부를 육안 관찰하였다. 관찰 결과는 표 1에 나타내었으며, 밀착이 발생한 경우를 ×, 밀착이 발생하지 않은 경우를 ○로 표시하였다.After laminating the PET film on the light collecting film prepared by Examples and Comparative Examples 1 to 7, and placing a load weight of 5kgf / cm 2 thereon, and left for 24 hours under a temperature of 85 ° C, 95% humidity conditions It was. After 24 hours, the adhesion between the light collecting film and the PET film was visually observed. The observation result is shown in Table 1, and the case where adhesion generate | occur | produced and the case where adhesion | attachment did not arise are represented by (circle).
실험예 2- 모아레 방지 효과 측정Experimental Example 2- Moiré prevention effect measurement
상기 실시예 및 비교예 1 ~7에 의해 제조된 각각의 집광 필름들을 백라이트 유닛의 도광판 위에 2장씩 서로 직교하도록 배치하였다. 여기서 직교란 집광 필름의 렌즈 구조물의 연장 방향이 서로 수직이 되도록 배치하는 것을 의미한다. 그런 다음 그 위에 LCD 패널을 상치한 뒤 육안 관찰을 통해 모아레 발생여부를 관찰하였다. Each of the light collecting films manufactured by Examples and Comparative Examples 1 to 7 was disposed to be orthogonal to each other on the light guide plate of the backlight unit. Here, orthogonal means that the extending directions of the lens structures of the light collecting film are arranged to be perpendicular to each other. Then, the LCD panel was put on it, and the moiré was observed by visual observation.
이때, 상기 LCD 패널로는 26인치, 32인치 및 37인치 FHD(full HD)를 각각 사용하였다.At this time, the LCD panel was used 26 inches, 32 inches and 37 inches FHD (full HD), respectively.
또한, 모아레 발생 여부는 모든 픽셀(pixel)이 On 상태인 “화이트 모드(white mode)”, 체크(check) 패턴과 같이 On 상태의 픽셀(pixel)와 Off 상태의 픽셀(pixel)들이 교대로 나타나는 “1 도트 모드(1 dot mod)”, 세로 방향 스트라이프 패턴처럼 인접한 On 상태의 픽셀(pixel) 열(column)과 Off 상태의 픽셀(pixel) 열(column)이 교대로 나타나는 “1 라인 수직 모드(1 line vertical mode)”, 가로 방향 스트라이프 패턴처럼 인접한 On 상태의 픽셀(pixel) 행(raw)과 Off 상태의 픽셀(pixel) 행(raw)이 교대로 나타나는 “1 라인 수평 모드(1 line horizontal mode)”의 총 4가지 모드에서 측정하였다. 측정 결과는 표 1에 나타내었다.In addition, whether moiré occurs or not, the pixels in the on state and the pixels in the off state alternately appear, such as a “white mode” and a check pattern in which all pixels are on. “1 dot mod”, “one-line vertical mode” in which adjacent pixel columns in the on state and pixel columns in the off state alternate, like a vertical stripe pattern. 1 line vertical mode ”,“ 1 line horizontal mode ”in which adjacent pixel rows in the on state and pixel rows in the off state appear alternately like a horizontal stripe pattern. In all four modes. The measurement results are shown in Table 1.
실험예 3 - 휘도 측정Experimental Example 3-Luminance Measurement
상기 실시예 및 비교예 1 ~7에 의해 제조된 각각의 집광 필름들을 백라이트 유닛의 도광판 위에 2장씩 서로 직교하도록 배치하였다. 여기서 직교란 집광 필름의 렌즈 구조물의 연장 방향이 서로 수직이 되도록 배치하는 것을 의미한다. 그런 다음, 집광 필름 정면의 중심 위치의 휘도를 측정하였다. 휘도 측정기기로는 Topcon社의 BM7TM을 사용하였으며, 실시예의 휘도를 기준(100%)으로 보았을 때, 비교예 1 ~ 7의 상대적인 휘도값으로 나타내었다. 측정 결과는 표 1에 나타내었다.Each of the light collecting films manufactured by Examples and Comparative Examples 1 to 7 was disposed to be orthogonal to each other on the light guide plate of the backlight unit. Here, orthogonal means that the extending directions of the lens structures of the light collecting film are arranged to be perpendicular to each other. Then, the brightness | luminance of the center position of the condensing film front surface was measured. Topcon BM7 TM was used as the luminance measuring device, and when the luminance of the example was regarded as a reference (100%), it was represented as a relative luminance value of Comparative Examples 1-7. The measurement results are shown in Table 1.
표 1
구분 휘도 비교 (%) 밀착 관찰 모아레 관찰
실시예 100 ○ 관찰 안됨
비교예1 100 ○ 1 도트 모드, 32/37” FHD에서 모아레 발생
비교예2 100 ○ 1 라인 수직 모드, 32/37" FHD에서 모아레 발생
비교예3 100 ○ 1 도트 모드, 26/32" FHD에서 모아레 발생
비교예4 95 ○ 1 도트 모드, 32/37" FHD에서 모아레 발생
비교예5 101 × 관찰 안됨
비교예6 98 ○ 관찰 안됨
비교예7 100 ○ 1 도트 모드, 32" FHD에서 모아레 발생
Table 1
division Luminance Comparison (%) Close observation Moiré observation
EXAMPLE 100 ○ Not observed
Comparative Example 1 100 ○ Moiré in 1 dot mode, 32/37 ”FHD
Comparative Example 2 100 ○ 1 line vertical mode, moiré at 32/37 "FHD
Comparative Example 3 100 ○ Moiré in 1 dot mode, 26/32 "FHD
Comparative Example 4 95 ○ Moiré in 1 dot mode, 32/37 "FHD
Comparative Example 5 101 × Not observed
Comparative Example 6 98 ○ Not observed
Comparative Example 7 100 ○ 1 dot mode, moiré at 32 "FHD

Claims (15)

  1. 일면에 일 방향으로 연장된 다수의 렌즈 구조물을 포함하며,It includes a plurality of lens structures extending in one direction on one side,
    상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향과 동일한 방향을 따라 배열되는 다수의 돌기들로 이루어진 제1돌기부; 및A first protrusion formed on an upper portion of the lens structure and formed of a plurality of protrusions arranged along the same direction as an extension direction of the lens structure; And
    상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향에 대하여 일정한 각도를 갖는 방향을 따라 배열되는 다수의 돌기들로 이루어진 제2돌기부를 포함하는 집광 필름.And a second protrusion formed on the lens structure, the second protrusion having a plurality of protrusions arranged along a direction having a predetermined angle with respect to an extension direction of the lens structure.
  2. 제1항에 있어서,The method of claim 1,
    상기 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도를 θ라 할 때, 10°≤θ≤40°인 집광 필름.A light converging film having an angle of 10 ° ≦ θ ≦ 40 ° when an angle between the extension direction of the lens structure and the projection arrangement direction of the second protrusion is θ.
  3. 제1항에 있어서,The method of claim 1,
    상기 제1돌기부는 하기 식 (1)을 만족하도록 형성되는 집광 필름.The first projection is a light collecting film is formed to satisfy the following formula (1).
    식 (1)Formula (1)
    P1,x = P1,y = n1×PL P 1, x = P 1, y = n 1 × P L
    상기 식 (1)에서, In the above formula (1),
    P1, x는 렌즈 구조물의 연장 방향에 대해 수직한 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이며,P 1, x is the distance between adjacent protrusions of the first protrusion measured along the direction perpendicular to the direction of extension of the lens structure,
    P1, y는 렌즈 구조물의 연장 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이고,P 1, y is the interval between adjacent protrusions of the first protrusion measured along the extension direction of the lens structure,
    PL은 렌즈 구조물 피치이며,P L is the lens structure pitch,
    n1은 정수임.n 1 is an integer.
  4. 제3항에 있어서,The method of claim 3,
    상기 n1은 3 내지 7인 집광 필름.The n 1 is a light collecting film of 3 to 7.
  5. 제1항에 있어서,The method of claim 1,
    상기 제2돌기부는 하기 식 (2) 및 식 (3)을 만족하도록 형성되는 집광 필름.The second projecting portion is a light collecting film formed to satisfy the following formulas (2) and (3).
    식 (2) : P2, x = (n2, x ×PL) / cosθEquation (2): P 2, x = (n 2, x × P L ) / cosθ
    식 (3) : P2, y= (n2, y ×PL) / sinθEquation (3): P 2, y = (n 2, y × P L ) / sinθ
    상기 식 (2) 및 식 (3)에서,In formulas (2) and (3),
    P2, x는 제2돌기부의 배열 방향에 수직한 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이며,P 2, x is the spacing between adjacent protrusions of the second protrusion measured along the direction perpendicular to the arrangement direction of the second protrusion,
    P2, y는 제2돌기부의 배열 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이고,P 2 and y are intervals between adjacent protrusions of the second protrusion measured along the arrangement direction of the second protrusion,
    PL은 렌즈 구조물 피치이며,P L is the lens structure pitch,
    n2, y는 정수이며, n2, x는 n2, y/tanθ에 가장 가까운 정수이며,n 2, y is an integer, n 2, x is an integer closest to n 2, y / tanθ,
    θ는 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도임.θ is the angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
  6. 제5항에 있어서,The method of claim 5,
    상기 제2돌기부는 식 (4) 5≤ n2, y/sinθ≤18을 만족하도록 형성되는 집광 필름.The second projecting portion is formed to satisfy the formula (4) 5≤n 2, y / sinθ≤18.
    상기 식 (4)에서, n2, y는 정수이며, θ는 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배치 방향 사이의 각도임.In the formula (4), n 2, y are integers, and θ is the angle between the extending direction of the lens structure and the projection arrangement direction of the second projection.
  7. 제1항에 있어서,The method of claim 1,
    상기 제1돌기부는 하기 식 (1)을 만족시키도록 형성되고, The first protrusion is formed to satisfy the following formula (1),
    상기 제2돌기부는 하기 식 (2) 및 식 (3)을 만족하도록 형성되는 집광 필름.The second projecting portion is a light collecting film formed to satisfy the following formulas (2) and (3).
    식 (1) : P1,x = P1,y = n1×PL Equation (1): P 1, x = P 1, y = n 1 × P L
    상기 식 (1)에서, In the above formula (1),
    P1, x는 렌즈 구조물의 연장 방향에 대해 수직한 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이며,P 1, x is the distance between adjacent protrusions of the first protrusion measured along the direction perpendicular to the direction of extension of the lens structure,
    P1, y는 렌즈 구조물의 연장 방향을 따라 측정한 제1돌기부의 인접 돌기들 사이의 간격이고,P 1, y is the interval between adjacent protrusions of the first protrusion measured along the extension direction of the lens structure,
    PL은 렌즈 구조물 피치이며,P L is the lens structure pitch,
    n1은 정수임.n 1 is an integer.
    식 (2) : P2, x = (n2, x ×PL) / cosθEquation (2): P 2, x = (n 2, x × P L ) / cosθ
    식 (3) : P2, y= (n2, y ×PL) / sinθEquation (3): P 2, y = (n 2, y × P L ) / sinθ
    상기 식 (2) 및 식 (3)에서,In formulas (2) and (3),
    P2, x는 제2돌기부의 배열 방향에 수직한 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이며,P 2, x is the spacing between adjacent protrusions of the second protrusion measured along the direction perpendicular to the arrangement direction of the second protrusion,
    P1, y는 제2돌기부의 배열 방향을 따라 측정한 제2돌기부의 인접 돌기들 사이의 간격이고,P 1 and y are intervals between adjacent protrusions of the second protrusion measured along the arrangement direction of the second protrusion,
    PL은 렌즈 구조물 피치이며,P L is the lens structure pitch,
    n2, y는 정수이며, n2, x는 n2, y/tanθ에 가장 가까운 정수이며,n 2, y is an integer, n 2, x is an integer closest to n 2, y / tanθ,
    θ는 렌즈 구조물의 연장 방향과 제2돌기부의 돌기 배열 방향 사이의 각도임.θ is the angle between the extension direction of the lens structure and the projection arrangement direction of the second projection.
  8. 제1항에 있어서,The method of claim 1,
    상기 제1돌기부 및 제2돌기부의 돌기들은 그 직경이 렌즈 구조물 피치의 0.1 내지 0.6배인 집광 필름.Condensing film of the projections of the first and second projections is 0.1 to 0.6 times the diameter of the lens structure pitch.
  9. 제1항에 있어서,The method of claim 1,
    상기 제1돌기부 및 제2돌기부의 돌기들은 그 높이가 돌기 직경의 0.1 내지 1배인 집광 필름.The condensing film of the protrusions of the first and second protrusions has a height of 0.1 to 1 times the diameter of the protrusion.
  10. 제9항에 있어서, The method of claim 9,
    상기 제1돌기부 및 제2돌기부의 돌기들은 그 높이가 1 내지 20㎛인 집광 필름.Condensing film of the protrusions of the first and second protrusions 1 to 20㎛ height.
  11. 광원;Light source;
    상기 광원의 측면에 배치되며, 상기 광원으로부터 출사된 빛의 경로를 제어하는 도광판; 및A light guide plate disposed at a side of the light source and controlling a path of light emitted from the light source; And
    상기 도광판 상부에 배치되며,일면에 일 방향으로 연장된 다수의 렌즈 구조물을 포함하고, 상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향과 동일한 방향을 따라 배열되는 다수의 돌기들로 이루어진 제1돌기부; 및 상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향에 대하여 일정한 각도를 갖는 방향을 따라 배열되는 다수의 돌기들로 이루어진 제2돌기부를 포함하는 집광 필름을 포함하는 백라이트 유닛.It is disposed on the light guide plate, and includes a plurality of lens structures extending in one direction on one surface, formed on the lens structure, consisting of a plurality of protrusions arranged in the same direction as the extension direction of the lens structure First projections; And a condensing film formed on an upper portion of the lens structure, the condensing film including a plurality of protrusions formed along a direction having a predetermined angle with respect to an extension direction of the lens structure.
  12. 제11항에 있어서,The method of claim 11,
    상기 백라이트 유닛은 확산 필름 및 보호 필름 중 적어도 하나 이상을 추가로 포함하는 백라이트 유닛.The backlight unit further includes at least one or more of a diffusion film and a protective film.
  13. 광원;Light source;
    상기 광원의 상부에 배치되며, 상기 광원으로부터 출사된 빛을 확산시키는 확산판; 및A diffusion plate disposed on the light source and diffusing the light emitted from the light source; And
    상기 확산판 상부에 배치되며, 일면에 일 방향으로 연장된 다수의 렌즈 구조물을 포함하고, 상기 렌즈 구조물의 상부에 형성되며 상기 렌즈 구조물의 연장 방향과 동일한 방향을 따라 배열되는 다수의 돌기들로 이루어진 제1돌기부; 및 상기 렌즈 구조물의 상부에 형성되며, 상기 렌즈 구조물의 연장 방향에 대하여 일정한 각도를 갖는 방향을 따라 배열되는 다수의 돌기들로 이루어진 제2돌기부를 포함하는 집광 필름을 포함하는 백라이트 유닛.A plurality of lens structures disposed on the diffusion plate and including a plurality of lens structures extending in one direction on one surface thereof, and formed on an upper portion of the lens structure and arranged along the same direction as an extension direction of the lens structure; First projections; And a condensing film formed on an upper portion of the lens structure, the condensing film including a plurality of protrusions formed along a direction having a predetermined angle with respect to an extension direction of the lens structure.
  14. 제13항에 있어서,The method of claim 13,
    상기 백라이트 유닛은 확산 필름 및 보호 필름 중 적어도 하나 이상을 추가로 포함하는 백라이트 유닛.The backlight unit further includes at least one or more of a diffusion film and a protective film.
  15. 청구항 11 내지 청구항 14 중 어느 한 항의 백라이트 유닛을 포함하는 디스플레이 장치.A display device comprising the backlight unit of claim 11.
PCT/KR2011/002578 2010-04-13 2011-04-12 Light-condensing film having superior anti-adhesion performance and superior moiré prevention effects, backlight unit comprising same, and display device comprising the backlight unit WO2011129587A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201180015254.5A CN102933989B (en) 2010-04-13 2011-04-12 Light-condensing film, backlight unit comprising same, and display device comprising the backlight unit
US13/634,807 US9494727B2 (en) 2010-04-13 2011-04-12 Light-condensing film having superior anti-adhesion performance and superior moiré prevention effects, backlight unit comprising same, and display device comprising the backlight unit
JP2013504816A JP5646728B2 (en) 2010-04-13 2011-04-12 Condensing film excellent in adhesion preventing performance and moire preventing effect, backlight unit including the same, display device, and manufacturing method of condensing film

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20100033849 2010-04-13
KR10-2010-0033849 2010-04-13
KR10-2011-0033197 2011-04-11
KR1020110033197A KR101214648B1 (en) 2010-04-13 2011-04-11 Condensing film having excellent prevention property of blocking and moire, backlight unit and display device comprising the same

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100697613B1 (en) * 2006-06-22 2007-03-22 주식회사 엘지에스 Optical film and planar lighting source apparatus using the same
KR100840572B1 (en) * 2007-03-14 2008-06-23 엘지전자 주식회사 Lens sheet, backlight unit and liquid crystal display device using the same
KR20090094777A (en) * 2008-03-03 2009-09-08 주식회사 엘지화학 Optical film and manufacturing process thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100697613B1 (en) * 2006-06-22 2007-03-22 주식회사 엘지에스 Optical film and planar lighting source apparatus using the same
KR100840572B1 (en) * 2007-03-14 2008-06-23 엘지전자 주식회사 Lens sheet, backlight unit and liquid crystal display device using the same
KR20090094777A (en) * 2008-03-03 2009-09-08 주식회사 엘지화학 Optical film and manufacturing process thereof

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