WO2012124983A2 - Feuille de réseau de micro-lentilles et unité de rétroéclairage dotée de cette dernière - Google Patents

Feuille de réseau de micro-lentilles et unité de rétroéclairage dotée de cette dernière Download PDF

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Publication number
WO2012124983A2
WO2012124983A2 PCT/KR2012/001848 KR2012001848W WO2012124983A2 WO 2012124983 A2 WO2012124983 A2 WO 2012124983A2 KR 2012001848 W KR2012001848 W KR 2012001848W WO 2012124983 A2 WO2012124983 A2 WO 2012124983A2
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WO
WIPO (PCT)
Prior art keywords
lens
array sheet
array
microlens
micro
Prior art date
Application number
PCT/KR2012/001848
Other languages
English (en)
Korean (ko)
Other versions
WO2012124983A3 (fr
Inventor
김윤현
한상철
Original Assignee
주식회사 엘지화학
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
Priority claimed from KR1020120025766A external-priority patent/KR101265312B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201280011801.7A priority Critical patent/CN103430056B/zh
Priority to US14/000,839 priority patent/US8896925B2/en
Priority to JP2013558788A priority patent/JP2014510952A/ja
Publication of WO2012124983A2 publication Critical patent/WO2012124983A2/fr
Publication of WO2012124983A3 publication Critical patent/WO2012124983A3/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00278—Lenticular sheets
    • B29D11/00298—Producing lens arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0043—Inhomogeneous or irregular arrays, e.g. varying shape, size, height
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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

  • Micro lens array sheet and back light unit including the same
  • the present invention relates to a microlens array sheet which can be used in a backlight unit and a backlight unit including the same, and more particularly , a microlens having an arrangement of microlenses with improved moire and improved optical performance.
  • a liquid crystal display device is an electronic device that transmits various electrical information generated by various devices to visual information by using a change in liquid crystal transmittance depending on an applied voltage.
  • Liquid crystal displays have been attracting attention as an alternative means to overcome the shortcomings of CRTCCathode Ray Tubes, which have been widely used since they have advantages such as miniaturization, light weight, and low power consumption. It is a situation that is installed in all information processing equipment.
  • such a liquid crystal display device generally applies a voltage to a liquid crystal having a specific molecular arrangement to change it into another molecular arrangement, and the birefringence, light beneficiation, dichroism, and light scattering characteristics of the liquid crystal generated by the change of the molecular arrangement
  • Optical It is a display device that converts a change into a visual change and uses modulation of light by liquid crystal.
  • a liquid crystal display device which is a light-receiving element without a self-luminous source, requires a separate light source device capable of illuminating the entire screen of the device.
  • Such an illumination device for a liquid crystal display device is commonly referred to as a backlight unit.
  • the backlight unit is distinguished from the edge method and the direct method according to the manner in which the light emitting lamp is arranged.
  • the edge method is a method in which a light emitting lamp is disposed on an axis of a light guide plate for guiding light generated from a light emitting lamp.
  • the edge method is applied to a relatively small liquid crystal display such as a monitor for a desktop computer or a notebook and has good light uniformity and durability. This is excellent and is advantageous for thinning the device.
  • the direct method was developed to be used in a medium-to-large display device of 20 inches or more, and a method of directly illuminating the front of the liquid crystal panel by arranging a plurality of lamp light sources under the liquid crystal panel.
  • a linear light source such as a cold cathode fluorescent lamp (CCF ⁇ ) has been widely used in the light emitting lamp for a backlight unit.
  • CCF ⁇ cold cathode fluorescent lamp
  • color reproducibility is superior to CCFL, it is less environmentally friendly, thinner,
  • LEDs light emitting diodes
  • a conventional backlight unit includes a plurality of backlight units for the purpose of diffusing or condensing light generated from a light source, improving luminance, or reducing lamp mura.
  • Optical film is used together.
  • FIG. 1 illustrates a conventional direct backlight unit by way of example, and a plurality of light sources 2 are arranged on a reflector plate 1, and the upper part of the light source is used to uniform the brightness of the entire screen and serve as a support for the optical films.
  • the diffuser plate 3 is used.
  • One or more diffuser films 4 and 5 may be used to focus the light diffused by the diffuser plate 3 into the effective viewing range and to increase the uniformity of the screen brightness.
  • Condensing films used in such a back light unit include a prism film, a lenticular film or a micro lens array (MLA) sheet.
  • the microlens array sheet performs both a condensing function and a diffusing function, but as shown in FIG.
  • Moire phenomenon occurs due to geometric interference.
  • Moire refers to an interference pattern generated when two or more periodic patterns overlap, and when two optical films having similar light and dark patterns overlap, a new light and dark pattern is generated. This is the moiré phenomenon.
  • Moire avoids this because it forms an unnecessary pattern in the image implemented in LCD.
  • the luminance may be drastically reduced.
  • the brightness and the viewing angle are very important characteristics, which are known to be determined by the characteristics of the optical sheet constituting the backlight unit.
  • the hemispherical microlens array sheet has been widely used, but such a hemispherical microlens array sheet has a limitation in increasing the luminance, and when the viewing angle characteristic is improved, the luminance is relatively low. Therefore, there is a need for a micro lens array sheet having an array of micro lenses capable of improving moiré while minimizing a decrease in luminance.
  • one aspect of the present invention is to provide a micro lens array sheet with improved moiré while maintaining excellent brightness. Accordingly, another aspect of the present invention is to provide a micro lens array sheet having improved luminance and viewing angle made of a conic lens. Thus another aspect of the present invention includes the micro lens array sheet Moire is improved, and to provide a backlight unit with improved brightness and viewing angle.
  • a base portion and a plurality of micro lenses formed on one surface of the base portion, wherein the plurality of micro lenses have an irregular arrangement the distance between the center points of two adjacent micro lenses Standard deviation of the microlens array sheet is provided, in which one microlens is selected to have an average pitch p between adjacent microlenses at a center point of the selected microlens.
  • a backlight unit including the micro lens array sheet is provided.
  • the backlight unit may include two sheets of the micro lens array sheet.
  • the present invention by removing the microlens periodicity of the microlens array sheet, it is possible to prevent the moiré phenomenon and to minimize the decrease in luminance. In addition, it is possible to improve the characteristics of the brightness and viewing angle at the same time by using a micro lens array sheet made of a conic lens. Therefore, when used in a liquid crystal panel, it is possible to provide a high quality screen in which the contrast pattern caused by moiré is reduced.
  • FIG. 1 schematically illustrates a configuration of an exemplary known backlight unit.
  • FIG. 2 schematically shows the microlens placement of an exemplary known microlens array sheet in which the microlens has a Honeycomb arrangement, showing schematically the underside of the lens.
  • FIG. 3 schematically shows the microlens arrangement of an exemplary microlens array sheet of the present invention having a random arrangement within a constant displacement, showing schematically the underside of the lens
  • FIG. 4 shows the microlens array having the lens arrangement as described above.
  • FIG. 5 schematically shows a configuration of a backlight unit according to an embodiment of the present invention.
  • FIG. 6 illustrates a moiré phenomenon using LightTools of Optical Research Associates after stacking two light collecting films of Example 1 by rotating about 5 degrees.
  • FIG. 7 shows a moiré phenomenon measured using optical tools of Optical Research Associates after stacking two light collecting films of Example 2 by rotating about 5 degrees.
  • FIG. 8 shows the moiré phenomenon using LightTools of Optical Research Associates after stacking two light collecting films of Comparative Example 1 of the present invention by rotating about 5 degrees.
  • the present invention includes a base portion, and a plurality of micro lenses formed on one surface of the base portion, wherein the plurality of micro lenses have an irregular arrangement, and distances and standard deviations between two adjacent ones and the thickening points of the micro lenses.
  • the present invention relates to a microlens array sheet, in which one microlens is selected to have an average pitch P between adjacent microlenses at a center point of the selected microlens.
  • the present invention relates to a standard deviation of distances between centers of two adjacent micros in the arrangement of microlenses; a) selecting one microlens and an average pitch between adjacent microlenses at the center of the selected microlens.
  • the micro lenses satisfy the above range. It is more preferable to have an irregular arrangement at the same time. If the arrangement of the microlenses has a regular arrangement while satisfying the standard deviation of the present invention, the moiré phenomenon may occur due to the periodicity of the microlens arrangement.
  • the average value (average pitch, P) of the distances between the adjacent lens center points is 10 / ffl -500 / iffl. If the average value is smaller than lOjum, it is difficult to manufacture the lens mold. If the average value is larger than 500im, the height of the lens increases, which increases the manufacturing cost due to the increase of the volume of the lens, the appearance of the lens is easily recognized, and the uniformity of the light distribution decreases. This can lower the appearance quality.
  • the microlenses of the present invention may be arranged using the triangles formed by connecting center points of three adjacent microlenses as basic array units A1 to A6.
  • LI, L2 and L3 represent the length of each side of the triangle which is the basic arrangement unit
  • ⁇ 1, ⁇ 2 and ⁇ 3 represent the angle of each inner angle of the triangle which is the basic arrangement unit.
  • the triangles formed by connecting the center points of the micro lenses are preferably formed to have different areas.
  • the area variation rate of the triangles that are the basic arrangement unit is 2 ⁇ 203 ⁇ 4 It is preferable and it is most preferable that it is 2 to 9%.
  • the ratio of the basic array units which are all basic array unit presentation triangles is less than 50%.
  • 2 shows a lens arrangement of a conventional micro lens array sheet. As shown in FIG. 2, it is common to form a conventional micro lens array sheet in a regular array such as a honeycomb array in which triangles formed by connecting center points of respective lenses form an equilateral triangle.
  • the microlens array sheet of the present invention can prevent the brightness from being lowered while reducing the moiré by modifying the basic array unit while basically maintaining the triangular array as described above.
  • the ratio of the arrangement unit which is an equilateral triangle among the said basic arrangement units is less than 50% of the whole.
  • the present invention more preferably does not include an array unit forming an equilateral triangle, and the array unit is represented by the following formula (1) or It is preferable to satisfy Formula (2), Most preferably, following Formula (1) and Formula (2) are satisfied simultaneously.
  • Equation (2) In this equation, LI, L2 and L3 are the lengths of the sides of the array unit, and ⁇ is the average pitch of the microlenses. In addition, in Equation (2), ⁇ 1, ⁇ 2 and ⁇ 3 are angles of the respective internal angles of the array unit.
  • the length of each side of the microlens array unit of the present invention is less than 80% or more than 120% of the average pitch ( ⁇ )
  • the angle of each cabinet angle of the array unit is 48 ° If it is less than or exceeds 72 ° , there is also a problem that the brightness is significantly lowered.
  • the shape of the micro lens that can be employed in the present invention is preferably selected from the group consisting of hemispheres, cones, conic and ellipses, but is not limited thereto, polypyramids, polygonal pyramids, other aspherical lenses, etc. It can be used in the lens arrangement of the invention.
  • the average diameter (D) of the microlenses is 90% to 126% of the average pitch, and when the diameter is less than 90% of the average pitch, the problem of low luminance increase even in a film having a general microlens arrangement is problematic. In addition, if it exceeds 126% of the pitch, it is meaningless to define a lens that protrudes by exceeding the diameter of the lens where the porosity may be zero within the random arrangement range proposed by the present invention. Further, the microlenses disposed on the substrate portion may have different diameters (D) of the bottom surface, but preferably microlenses having the same diameter are used.
  • the height of the microlenses is preferably 20% to 100 3/4> of the average pitch, and when the height is less than 20% of the average pitch, the luminance increase effect tends to be low even in a general microlens arrangement. 100% If it exceeds, it is not only easy to fabricate, but even the general microlens arrangement tends not to be excellent in brightness enhancement.
  • the height of the lenses may be different, it is easier to adjust the lens arrangement to improve the moiré while minimizing the brightness reduction when performing the limited random placement of the present invention using the same height microlenses.
  • the microlens of the present invention may be a conic-type lens, and the 'conic lens' includes all curved surfaces including a case in which the bottom surface of the lens is circular and the vertical cross section of the center of the lens is hyperbolic and parabolic. It means a conical lens having a triangular vertical cross section at the center of the lens, a hemispherical lens having a semicircular cross section, and an elliptical lens having an elliptical cross section.
  • the shape of the conic lens can be specified from the following equation (3), in which H is the height from the bottom of the conic lens to the imaginary vertex, r represents the radius of the curve and at the peak of the lens, k Denotes a conic constant.
  • H is the height from the bottom of the conic lens to the imaginary vertex
  • r represents the radius of the curve and at the peak of the lens
  • k Denotes a conic constant.
  • the shape of a curved lens is expressed as a function of the curve at the vertex of the lens as the radius (r) and the conic constant (k) as variables.
  • the koenic constant k determines the shape of the lens.
  • the conic constant (k) of the conic lens is -3 to -1, more preferably -2.8 to -1.5.
  • curd at the said Konak lens vertex is 0.2%-26% of the said average pitch P, More preferably, it is 20%. If it is less than 0.2%, it may be defective or vulnerable to scratch at the time of mass production of the product, there may be problems such as bubble generation and production time delay, and if it exceeds 26%, there is a problem in light collection efficiency.
  • An arrangement of exemplary microlenses of the present invention is shown in FIGS. 3 and 4, FIG.
  • FIG. 3 is an illustration of an arrangement of microlenses caused by a bottom surface
  • FIG. 4 of the present invention in which microlenses are arranged in accordance with the present invention.
  • a perspective view of an exemplary micro lens array sheet is shown.
  • Methods for producing a microlens array sheet using a mold are well known in the art, and those skilled in the art will be able to manufacture the microlens array sheet of the present invention with reference to the description herein and the prior art.
  • the microlens array sheet of the present invention is formed between a mold and a plate-shaped mold and a base portion of which the lens shape of the present invention is engraved on the light exit surface after forming a base portion by extruding a thermoplastic resin or the like into a film form.
  • the microlens array sheet of the present invention can be produced by injecting a curable resin into a desired pattern on the light exit surface of the film and irradiating ultraviolet rays or heat to the film on which the pattern is formed.
  • the conic lens of the present invention can be formed by placing a cured resin solution in a mold having a conic lens shape engraved on the substrate and then curing the ah, a method of arranging asymmetric beads, a mask using a laser It may be formed by an etching method and a direct processing method, a manufacturing method using photolithography, and the like.
  • the curable resin usable in the present invention may include a urethane acrylate, epoxy acrylate, ester acrylate or a radical-generating monomer, and these may be used alone or in combination, but is not limited thereto. .
  • Using a mold in which various shapes are engraved lenses having various shapes, heights, and pitches can be formed.
  • the lens shape of the light exit surface in the mold is known in the art, such as conventional mold manufacturing methods, such as mechanical cutting, photoresist reflow method, photoresist laser exposure method, bead coating, laser etching, etc. Through way etc. You can get it.
  • the mold may be a flat plate, a caterpillar or a drum-type mold, and may be made of a hard material such as metal or ceramic such as nickel or chromium or a soft material such as polymer or silica coated polymer film.
  • the present invention relates to a backlight unit including the micro lens array sheet.
  • the backlight unit includes a light source and at least one micro lens array sheet on the light source.
  • the microlens array sheet that can be used in the backlight unit of the present invention is as described above, and the microlens array sheet of the present invention is disposed between the light source unit and the liquid crystal panel and used for the liquid crystal display display.
  • the microlens array sheet is preferably laminated between the light guide plate and the liquid crystal panel when applied to the edge type backlight, and is disposed between the light source and the liquid crystal panel when applied to the direct type backlight, preferably on the diffuser plate. do.
  • a reflector having excellent reflectance under the light source.
  • the position referred to as the lower portion of the light source is understood to refer to the lower portion of the light guide plate more clearly in the case of the edge type backlight.
  • the backlight unit of the present invention in addition to the above-described micro lens array sheet Additional optical films may be included, and the additional optical film may be any optical film known in the art, such as a diffusion film or a condensing film, and may be appropriately added and configured as necessary.
  • the backlight unit of the present invention may preferably include two micro lens array sheets of the present invention.
  • a light condensing film in which microlenses were two-dimensionally arranged was formed such that the standard deviation of the distances between the two was 2.3 and the area variation rate of the triangles, which were the basic arrangement units, was 4.5%.
  • Example 1 Except that the microlenses were two-dimensionally arranged in Example 1 so that the standard deviation of the distances between the center points of two adjacent lenses was 9.2 / and the area variation rate of the triangles which were the basic arrangement units satisfies 18.5%. The conditions similarly formed the condensing film. Comparative Example 1
  • Example 2 a condensing film was formed by regularly arranging conic lenses in two dimensions. Comparative Example 2
  • Example 1 and 2 The other conditions are the same except that the microlenses are two-dimensionally arranged so that the standard deviation of the distances between the center points of two adjacent lenses in Example 1 is 0.6 and the area variation rate of the triangles, which is the basic arrangement unit, is satisfied.
  • Condensing film was formed.
  • each of the light collecting films were rotated about 5 degrees from each other in lamination on the backlight, and the center luminance value and the moire characteristics of the light were measured by a ray-tracing program (Ray).
  • the simulation was performed using a tracing program, LightTools of Optical Research Associates.
  • the luminance measurement results were shown in the following [Table 1], and the moire characteristics of Example 1 and Example 2 were the same as those of [Fig.
  • the luminance of the lens array method is higher than that of the lens array method having a regular array. It can be seen that there is an effect that the moiré phenomenon is remarkably improved while reducing the decrease.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention se rapporte à une feuille de réseau de micro-lentilles qui présente une meilleure performance optique, ainsi qu'à une unité de rétroéclairage dotée de cette feuille de réseau de micro-lentilles et, de façon plus précise, à une feuille de réseau de micro-lentilles et à une unité de rétroéclairage dotée de cette dernière, la feuille de réseau de micro-lentilles comprenant : une partie de base ; et une pluralité de micro-lentilles formées sur une surface de la partie de base, la pluralité de micro-lentilles présentant un réseau irrégulier et l'écart-type de la distance entre les points intermédiaires de deux micro-lentilles adjacentes l'une par rapport à l'autre variant entre 2 et 20 % du pas moyen (p) entre les micro-lentilles adjacentes par rapport au point intermédiaire d'une micro-lentille sélectionnée après la sélection d'une des micro-lentilles.
PCT/KR2012/001848 2011-03-15 2012-03-14 Feuille de réseau de micro-lentilles et unité de rétroéclairage dotée de cette dernière WO2012124983A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201280011801.7A CN103430056B (zh) 2011-03-15 2012-03-14 微透镜阵列片以及包括所述微透镜阵列片的背光单元
US14/000,839 US8896925B2 (en) 2011-03-15 2012-03-14 Micro-lens array sheet and backlight unit comprising the same
JP2013558788A JP2014510952A (ja) 2011-03-15 2012-03-14 マイクロレンズアレイシート及びこれを含むバックライトユニット

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20110022910 2011-03-15
KR10-2011-0022910 2011-03-15
KR1020120025766A KR101265312B1 (ko) 2011-03-15 2012-03-13 마이크로 렌즈 어레이 시트 및 이를 포함하는 백라이트 유닛
KR10-2012-0025766 2012-03-13

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WO2012124983A2 true WO2012124983A2 (fr) 2012-09-20
WO2012124983A3 WO2012124983A3 (fr) 2012-12-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104241543A (zh) * 2013-06-05 2014-12-24 环球展览公司 发光装置及其制造方法
CN106461815A (zh) * 2014-05-27 2017-02-22 纳卢克斯株式会社 微透镜阵列及包括微透镜阵列的光学系统
US20230258314A1 (en) * 2022-02-17 2023-08-17 Daicel Corporation Microlens Array, Diffuser Plate, and Illumination Apparatus

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KR20090126531A (ko) * 2008-06-04 2009-12-09 삼성전자주식회사 광학 필름, 상기 광학 필름을 구비한 백라이트 유닛, 및상기 백라이트 유닛을 구비한 ｌｃｄ 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3251150B2 (ja) * 1994-12-29 2002-01-28 日本板硝子株式会社 平板マイクロレンズアレイおよびその製造方法
KR20080094053A (ko) * 2001-06-01 2008-10-22 도판 인사츠 가부시키가이샤 마이크로렌즈 시트, 프로젝션 스크린 및 표시 장치
KR100917975B1 (ko) * 2007-06-23 2009-09-17 미래나노텍(주) 광학 시트
KR20090126531A (ko) * 2008-06-04 2009-12-09 삼성전자주식회사 광학 필름, 상기 광학 필름을 구비한 백라이트 유닛, 및상기 백라이트 유닛을 구비한 ｌｃｄ 장치

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104241543A (zh) * 2013-06-05 2014-12-24 环球展览公司 发光装置及其制造方法
CN104241543B (zh) * 2013-06-05 2019-02-15 环球展览公司 发光装置及其制造方法
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