WO2009017319A2 - Apparatus of fabricating optical sheet, method for fabricating optical sheet, and optical sheet fabricated using the same - Google Patents

Apparatus of fabricating optical sheet, method for fabricating optical sheet, and optical sheet fabricated using the same Download PDF

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Publication number
WO2009017319A2
WO2009017319A2 PCT/KR2008/004281 KR2008004281W WO2009017319A2 WO 2009017319 A2 WO2009017319 A2 WO 2009017319A2 KR 2008004281 W KR2008004281 W KR 2008004281W WO 2009017319 A2 WO2009017319 A2 WO 2009017319A2
Authority
WO
WIPO (PCT)
Prior art keywords
mold film
pattern
polymer resin
optical sheet
roll
Prior art date
Application number
PCT/KR2008/004281
Other languages
French (fr)
Other versions
WO2009017319A3 (en
Inventor
Seung Kyu Choi
Cheol Heung Ahn
Suk Jun Kim
Je Min Yeoun
Young Shin Choi
Chan Kyu Park
Ka Young Son
Hyun Ee Yang
Original Assignee
Shinwha Intertek Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinwha Intertek Corp. filed Critical Shinwha Intertek Corp.
Priority to CN2008800233305A priority Critical patent/CN101730620B/en
Publication of WO2009017319A2 publication Critical patent/WO2009017319A2/en
Publication of WO2009017319A3 publication Critical patent/WO2009017319A3/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00Producing flat articles, e.g. films or sheets
    • B29D7/01Films or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/148Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length characterised by the shape of the surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/18Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent

Definitions

  • the present invention is directed to an apparatus of fibricating an optical sheet, a method for fibricating an optical sheet, and an optical sheet ⁇ bricated using the same, and more particularly, to an apparatus of ⁇ bricating an optical sheet applied to a flat panel display, a method for fibricating an optical sheet, and an optical sheet fibricated using the same.
  • Optical sheets applied to flat panel displays have been fibricated using a typical extruding die mold.
  • a die mold is to be individually prepared whenever a shape of an intended pattern of the optical sheet is changed.
  • the present invention provides an apparatus of fibricating an optical sheet, which can easily embody an intended pattern and causes no characteristic degradation of the optical sheet.
  • the present invention also provides a method for fibricating an optical sheet, which can easily embody an intended pattern and causes no characteristic degradation.
  • the present invention also provides an optical sheet fibricated using the apparatus of fibricating the optical sheet.
  • polymer resin is completely transferred to a pattern of a mold film in a multi-step manner using a coating roll and a squeezing roll. Moreover, the polymer resin com- pressively intrudes to the inside of the pattern of the mold film. Therefore, a pattern configuration of the mold film is exactly transferred to the transparent member when iabricating the optical sheet. Thus, the optical sheet of high luminance can be fibricated.
  • FIG. 1 is a schematic construction view illustrating an apparatus of iabricating an optical sheet according to an embodiment of the present invention
  • FIGS. 2 through 4 are enlarged views of A, B and C in FIG. 1, respectively;
  • FIG. 5 is a flow chart sequentially illustrating a method for iabricating an optical sheet according to an embodiment of the present invention.
  • FIGS. 6 and 7 are perspective views illustrating an optical sheet according an embodiment of the present invention. Best Mode for Carrying Out the Invention
  • an apparatus of fibricating an optical sheet comprising: a master roll; a mold film including a pattern and rotated by contacting one side of the pattern with at least one portion of the master roll; at least one coating roll for supplying a polymer resin to the pattern of the mold film; at least one squeezing roll for pressing the polymer resin on a suriace of the pattern of the mold film to the inside of the pattern of the mold film to fill the inside of the pattern of the mold film with the polymer resin; a tension control roll for controlling a tension of the mold film to consistently control overall mold film; a uniting roll for uniting the mold film to a transparent member intended to be formed with the pattern of the polymer resin on the master roll; a hardening agent for hardening the pattern of the polymer resin; and a separation roll for separating the mold film from the transparent member formed with the pattern of the polymer resin.
  • the mold film may be shaped as a belt, for example.
  • the coating roll supplies the polymer resin to the pattern of the mold film in a multi-step manner.
  • the apparatus of iabricating the optical sheet further comprises a resin supply tub placed on a lower portion of the coating roll, and supplying the polymer resin to the coating roll, and the resin supply tub comprises a heating unit for maintaining the polymer resin at a constant temperature.
  • the apparatus of iabricating the optical sheet further comprises at least one nip roll placed on an upper portion of the coating roll by interposing the mold film, and supporting the mold film.
  • the apparatus of fibricating the optical sheet of further comprises a resin supply tub that is placed on a lower portion of the squeezing roll and supplies the polymer resin to the squeezing roll.
  • the squeezing roll allows the polymer resin to be filled in the inside of the pattern of the mold film in a multi-step manner.
  • the hardening agent is a thermosetting agent or an ultraviolet curing agent.
  • a method for iabricating an optical sheet comprising: supplying a polymer resin to a pattern of a mold film while rotating the mold film; compressively pressing the polymer resin placed on a surface of the pattern of the mold film to allow the polymer resin to be filled in an inside of the pattern of the mold film; controlling a tension of the mold film supplied with the polymer resin to consistently adjust overall mold film; uniting the mold film to a transparent member where the pattern of the polymer resin is intended to be formed; hardening the pattern of the polymer resin transferred onto the transparent member; and separating the mold film from the transparent film formed with the pattern of the polymer resin.
  • the polymer resin is supplied to the pattern of the mold film in a multi- step manner.
  • the method for fibricating the optical sheet comprises supporting the mold film when supplying the polymer resin.
  • the polymer resin is filled in the inside of the pattern of the mold film in a multi-step manner.
  • Spatially opposing words e.g., the bottom such as below, beneath, and lower versus the top such as above and upper, as used herein are intended to easily describe correlation between one component and the other components as illustrated in the drawings.
  • the spatially opposing words can be construed as terms to include any directions of the components when being used or operated in addition to a direction illustrated in the drawings. For example, if the components shown in the drawings are up-side-down, the components described as being below or beneath the other component can be placed above or upper the other component. Therefore, the illustrative word including the bottom may include both directions of the bottom and the top. The components may fice another direction so that the spatially opposing words can be construed according to the orientation.
  • FIG. 1 is a schematic construction view illustrating an apparatus of fibricating an optical sheet according to an embodiment of the present invention.
  • FIGS. 2 through 4 views are enlarged views of A, B and C in FIG. 1, respectively.
  • the apparatus of fibricating the optical sheet according to the embodiment of the present invention includes a master roll 1110, a mold film 1120, a coating roll 1130, a squeezing roll 1160, a tension control roll 1170, a uniting roll 1180, a hardening agent 1210, and a separation roll 122Q
  • the master roll 1110 is a rotatable cylindrical roll, which may be formed of a metal or an elastic material.
  • a structural steel such as a carbon steel or a tempering steel is included.
  • a heat-resistant silicon rubber or a fluoride rubber may be included.
  • the mold film 1120 as illustrated in FIG. 2 is placed around an outer periphery of the master roll 11 IQ A pattern is formed to one side of the mold film 1120, and the other side thereof has an even surface so that at least partially contacts the master roll 11 IQ
  • the mold film 1120 may include a pattern film 1124 on the transparent film 1122 as shown in FIG. 2, or may be integrally formed although not illustrated in the drawing.
  • an unillustrated friction unit may be further provided to the transparent film
  • the mold film 1120 may be shaped as a belt, for example.
  • a diameter of the belt-shaped mold film 1120 should be greater than that of the above-mentioned master roll H lQ
  • the mold film 1120 may have a hemispherically-formed pattern as illustrated in FIG.
  • the shape of the pattern is not specially restricted but may complement to the optical sheet according to a pattern intended to be formed.
  • the mold film 1120 should have a predetermined surface energy to receive polymer resin 1140 supplied to the inside of the pattern of the mold film 1120 using the coating roll 113Q
  • the suriace energy value is a physical property of the mold film 1120 relating to adhesiveness with the polymer resin 114Q That is, a predetermined suriace energy value is required so that the pattern of the mold film 1120 receives the polymer resin 1140 supplied from the coating roll 1130 and minimizes over- flown quantity to an outside of the pattern of the mold film 112Q
  • the suriace energy value of the mold film 1120 can be controlled relative to a kind of the polymer resin 1140, which can be selected from a range of, e.g., ⁇ bout 15 ⁇ 65dyne/cm.
  • the suriace energy value of the mold film 1120 may be about 30dyne/cm and higher.
  • the pattern film 1124 where the pattern of the mold film 1120 is formed may use silicon resin that satisfies the above-described suriace energy value.
  • the coating roll 1130 is separated from the master roll 1110, and supplies the polymer resin 1140 to the pattern of the mold film 1120 rotated together with the rotation of the master roll 11 IQ
  • At least one coating roll 1130 may be included to the apparatus of fibricating the optical sheet, and the number of the coating rolls 1130 can be adjusted by considering an occupying space of the apparatus of fib- ricating the optical sheet and a supply efficiency of the polymer resin 114Q
  • the coating roll 1130 retains the polymer resin 1140 of an objective quantity and again supplies the polymer resin 1140 to the pattern of the mold film 1120, a predetermined suriace hardness value is required. That is, it is required to retain the objective quantity of the polymer resin 1140 from a resin supply tub 1132 disposed to a lower portion of the coating roll 1130, and have the suriace hardness value within the range of supplying the sufficient quantity of the polymer resin 1140 to the inside of the pattern of the mold film 112Q [36]
  • the surface hardness of the coating roll 1140 can be adjusted relative to the kind of the polymer resin 1140 used herein and a material that constitutes the pattern of the mold film 1120, which can be selected within a range of about 10 ⁇ 90Gpa, for example.
  • the surface hardness value of the coating roll 1130 may be 10 ⁇ 20Gpa, for example.
  • the coating roll 1130 may be formed of silicon resin that satisfies the foregoing surface energy value.
  • the resin supply tub 1132 placed under the coating roll 1130 contains the polymer resin 1140 provides a site where the coating roll 1130 contacts the polymer resin 1140 to supply the coating roll 113Q
  • the resin supply tub 1132 may include a nozzle (not shown) that receives an externally-supplied resin solution to supply the resin solution to the surface of the coating roll 1130
  • the resin supply tub 1132 may include a heating unit (not shown) for making the polymer resin 1140 be maintained a liquid state having fluidity.
  • a solvent may be used to make the polymer resin 1140 have the fluidity.
  • a temperature of the resin supply tub 1132 may be changed according to the kind of the polymer resin 1140 contained within the resin supply tub 1132, which may be about 20 ⁇ 80°C, for example.
  • the polymer resin 1140 contained within the resin supply tub 1132 may be a thermosetting resin or an ultraviolet curing resin, which may be any one selected from the group consisting of polymethylmetacrykte resin, polycarbonate resin, polystylene resin, polyprophylene resin, polyethyleneterephthakte resin, polycarbonatevinyl resin, thermoplastic elastomer, silicon resin, fluoride resin and a copolymer of these materials.
  • the resin supply tub 1132 can further contain additives such as a light diffuser and an antistatic agent.
  • a nip roll 1150 is a rotatable cylindrical roll, which may be placed on an upper surface of the coating roll 1130 by interposing the mold film 112Q That is, the nip roll 1150 contacts the transparent film 1122 of the mold film 1120 on an opposite side of the coating roll 1130 contacting the pattern 1124 side of the mold film 1120, thereby supporting the mold film 1120 against the coating roll 1130 and prevent a slip of the mold film 112Q
  • the squeezing roll 1160 may be disposed to additionally provide the polymer resin 1140 to the pattern of the mold film 1120 supplied with the polymer resin 1140 by the coating roll 1130, and may press the mold film 1120 to contact the master roll 1110, so that the polymer resin 1140 placed on the suriace of the mold film 1120 to the inside of the mold film 1120 for completely filling the inside of the pattern of the mold film 1120 with the polymer resin 114Q
  • the apparatus of fibricating the optical sheet may include at least one squeezing roll
  • the number of the squeezing rolls 1160 can be adjusted in view of an occupying space of the apparatus of fibricating the optical sheet and the filling state of the polymer resin 114Q
  • the polymer resin 1140 may be filled in the inside of the pattern of the mold film 1120 using the squeezing roll 116Q
  • the squeezing roll 1160 should retain the objective quantity of the polymer resin 1140 and then fill the polymer resin 1140 in the pattern of the mold film 1120, a predetermined suriace hardness value is demanded. That is, it is required to retain the objective quantity of the polymer resin 1140 from the resin supply tub 1162 disposed under the squeezing roll 1160, and have the suriace hardness value within a range of supplying a sufficient quantity of the polymer resin 1140 into the pattern of the mold film 112Q
  • the suriace hardness of the squeezing roll 1160 may be adjusted relative to the kind of the polymer resin 1140 used herein and the material constituting the pattern of the mold film 1120, which may be selected from a range of about 10 ⁇ 90Gpa, for example.
  • the suriace hardness value of the squeezing roll 1160 may be about 10 ⁇ 20Gpa.
  • the squeezing roll 1160 may be formed of silicon resin that satisfies the above-described suriace energy value.
  • a heating unit (not shown) may also be provided.
  • the tension control roll 1170 is a rotatable cylindrical roll, which controls a tension of the mold film 112Q That is, the tension control roll 1170 consistently controls the mold film 1120 when the mold film 1120 encircling the master roll 1110 is loose or unbalanced left and right.
  • the tension control roll 1170 is spaced apart from the master roll 1110 to contact the transparent film 1122 side of the mold film 1120, and is movable up and down and left and right according to the state of the mold film 1120 for controlling the tension.
  • the uniting roll 1180 is a rotatable cylindrical roll for uniting the mold film 1120 to a transparent member 1190 to transfer the polymer resin 1140 within the mold film 1120 to the transparent member 1190 to which the pattern is intended to be formed.
  • the uniting roll 1180 is disposed on the master roll 1110 by interposing the mold film 1120 and the transparent member 1190, and presses the transparent member 1190 and the mold film 1120 from the transparent member 1190 side to transfer the polymer resin 1140 within the pattern of the mold film 1120 to the transparent member 119Q
  • the transparent member 1190 is supplied to the uniting roll 1180 from a separately provided unwinder roll 1182, and is formed of a film-like transparent material that can transmit light such as polycarbonate resin, polysulfone resin, poly- acrykte resin, polystylene resin, polyvinylchloride resin, polyvinyHcohol resin, poly- norbornene resin, polyester resin, for example.
  • the uniting roll 1180 applies a pressure at a predetermined force to unite the polymer resin 1140 within the pattern of the mold film 1120 with the transparent member 1190, thereby compressively pressing the polymer resin 1140 of the mold film 1120 and the transparent member 119Q
  • the compressive pressure of the uniting roll 1180 with respect to the master roll 1110 may be about l ⁇ 10kgf/cnf, for example.
  • the hardening agent 1210 hardens the polymer resin 1140 transferred onto the transparent member 1190 to prevent separation of the pattern formed of the polymer resin 1140 from the transparent member 119Q
  • the hardening agent 1210 may be a thermosetting agent or an ultraviolet curing agent, for example. This may be selected in view of the kind of the polymer resin 1140 used.
  • the polymer resin 1140 is hardened by the hardening agent 1210 so that the intended pattern composed of the polymer resin 1140 is formed on the transparent member 119Q
  • the polymer resin 1140 hardened by the hardening agent 1210 is attached on the transparent member 1190 as illustrated in FIG. 4.
  • the separation rolls 1220 are a pair of rotatable cylindrical rolls, which separate the mold film 1120 from the optical sheet including the transparent member 1190 attached with the pattern composed of the polymer resin that is hardened by the hardening agent 121Q
  • the apparatus of fibricating the optical sheet may further include a rewinder roll for winding the optical sheet separated using the separation rolls 122Q
  • FIG. 5 is a flow chart sequentially il- lustrating a method for iabricating an optical sheet according to an embodiment of the present invention.
  • a mold film 1120 encircling an outer periphery of the master roll 1110 and at least partially contacting the master roll 1110 is rotated to be supplied with a polymer resin 1140 from a coating roll 1130
  • the coating roll 1130 is rotated in a direction counter to that of the master roll 1110, and supplies the polymer resin 1140 provided from a resin supply tub 1132 placed under the coating roll 1130 to the pattern of the mold film 112Q
  • the polymer resin 1140 supplied to the pattern of the mold film 1120 may be supplied in a multi-step manner through at least one or two squeezing rolls 1160, for example, to fill up the pattern of the mold film 112Q
  • the quantity of blowholes liably included in the polymer resin 1140 can be minimized. Consequently, the quantity of the blowholes incurred within a completed optical sheet can be minimized to characteristics degradation of the optical sheet.
  • a temperature of a resin supply tub 1132 may be, e.g., about 20-80, so as to allow the polymer resin 1140 contained therein to maintain a predetermined viscosity of, e.g., 50 ⁇ 5,000cps.
  • a nip roll 1150 placed on an upper portion of the coating roll 1130 is rotated in a direction counter to that of the coating roll 1130 by interposing the mold film 1120 so as to support the mold film 1120 against the coating roll 1130 and prevent a slip of the mold film 112Q
  • the mold film 1120 supplied with the polymer resin 1140 is pressed to the master roll 1110 using the squeezing roll 1160, so that the polymer resin 1140 existing on a suriace of the mold film 1120 is compressively pressed to be filled in the pattern of the mold film 112Q
  • the squeezing roll 1170 is rotated in a direction counter to that of the master roll 1110, and then is supplied with the polymer resin 1140 from a resin supply tub 1162 placed on a lower portion of the squeezing roll 1160 By doing so, the polymer resin 1140 is additionally filled in the inside of the pattern of the mold film 112Q
  • the polymer resin 1140 filled in the pattern of the mold film 1120 may be supplied in a multi-step manner using at least one or, e.g., two squeezing rolls 116Q If the polymer resin 1140 is filled in the multi-step manner, the quantity of the blowholes liably included in the polymer resin 1140 can be minimized. Consequently, the quantity of the blowholes included in a completed optical sheet is minimized to prevent the characteristics degradation of the optical sheet.
  • a temperature of the resin supply tub 1162 may be, e.g., ⁇ bout 20 ⁇ 80°C, so as to allow the polymer resin 1140 contained therein to maintain a predetermined viscosity of, e.g., 50 ⁇ 5,000cps.
  • a tension control roll 1170 may be used to consistently adjust overall mold film 112Q At this time, the tension of the mold film 1120 can be controlled by moving a central axis of the rotation up and down and left to right while the tension control roll 1170 is rotated in the direction identical to that of the master roll 1110 in view of the state of the mold film 112Q
  • the mold film is united to a transparent member where the pattern of the polymer resin is intended to be formed (S4 of FIG. 5).
  • the polymer resin 1140 filling up to substantially 100% in the pattern of the mold film 1120 is united to the transparent member 119Q
  • the transparent member 1190 is successively supplied to a uniting roll 1180 through an unwind roll 1182.
  • the uniting roll 1180 presses the transparent member 1190 and the mold film
  • the transparent member 1190 and the mold film 1120 are united to transfer the polymer resin 1140 in the pattern of the mold film 1120 to the transparent member 119Q
  • the pattern of the polymer resin 1140 transferred onto the transparent member 1190 is hardened while passing through the uniting roll 1180 and the master roll 1110 to prevent the separation of the pattern of the polymer resin 1140 from the transparent member 1190
  • a hardening agent 1210 for hardening the polymer resin 1140 an ultraviolet curing agent or a thermosetting agent may be used, for example.
  • the suitable hardening agent 1210 is selected according to a kind of the polymer resin 114Q By performed the hardening, the polymer resin 1140 is attached on the transparent member 1190 as a predetermined pattern.
  • the transparent member including a hardened polymer resin pattern is separated from the mold film (S6 of FIG. 5).
  • optical sheet completed using the method as described above is wound by a rewinder roll (not shown), and is subjected to processing of a general optical sheet.
  • the optical sheet including the pattern P formed of the polymer resin and the transparent member B may be a diffusion sheet, a prism sheet, etc., applicable to a backlight assembly of a flat panel display such as a liquid crystal display, for example.
  • An apparatus of iabricating an optical sheet, a method for iabricating an optical sheet, and an optical sheet using the same according to the present invention can be applied to technical fields of a liquid crystal display, a backlight assembly used in the liquid crystal display, and an optical sheet used in the backlight assembly.

Abstract

Provided are an apparatus of fabricating an optical sheet, a method for fabricating an optical sheet, and an optical sheet fabricated using the same. The apparatus of fabricating the optical sheet includes a master roll, and a mold film including a pattern and rotated by contacting one side of the pattern with at least one portion of the master roll. Also included are at least one coating roll for supplying a polymer resin to the pattern of the mold film, at least one squeezing roll for pressing the polymer resin on a surface of the pattern of the mold film to the inside of the pattern of the mold film to fill the inside of the pattern of the mold film with the polymer resin, a tension control roll for controlling a tension of the mold film to consistently control overall mold film, a uniting roll for uniting the mold film to a transparent member intended to be formed with the pattern of the polymer resin on the master roll, a hardening agent for hardening the pattern of the polymer resin, and a separation roll for separating the mold film from the transparent member formed with the pattern of the polymer resin.

Description

Description
APPARATUS OF FABRICATING OPTICAL SHEET, METHOD
FOR FABRICATING OPTICAL SHEET, AND OPTICAL SHEET
FABRICATED USING THE SAME
Technical Field
[1] The present invention is directed to an apparatus of fibricating an optical sheet, a method for fibricating an optical sheet, and an optical sheet βbricated using the same, and more particularly, to an apparatus of βbricating an optical sheet applied to a flat panel display, a method for fibricating an optical sheet, and an optical sheet fibricated using the same. Background Art
[2] Optical sheets applied to flat panel displays have been fibricated using a typical extruding die mold. When an optical sheet is fibricated using the extruding die mold, a die mold is to be individually prepared whenever a shape of an intended pattern of the optical sheet is changed. Also, as the trend of thinning down the flat panel display continues, it is difficult to make a surface of the thinned-down optical sheet have an even thickness, and to control blowholes produced within the optical sheet while being fibricated using the extrusion die mold. Therefore, the optical sheet βbricated using the extruding die mold has a problem of characteristics degradation of the optical sheet.
Disclosure of Invention Technical Problem
[3] The present invention provides an apparatus of fibricating an optical sheet, which can easily embody an intended pattern and causes no characteristic degradation of the optical sheet.
[4] The present invention also provides a method for fibricating an optical sheet, which can easily embody an intended pattern and causes no characteristic degradation.
[5] The present invention also provides an optical sheet fibricated using the apparatus of fibricating the optical sheet.
Advantageous Effects
[6] According to an apparatus of fibricating an optical sheet of the present invention, polymer resin is completely transferred to a pattern of a mold film in a multi-step manner using a coating roll and a squeezing roll. Moreover, the polymer resin com- pressively intrudes to the inside of the pattern of the mold film. Therefore, a pattern configuration of the mold film is exactly transferred to the transparent member when iabricating the optical sheet. Thus, the optical sheet of high luminance can be fibricated.
Brief Description of the Drawings
[7] FIG. 1 is a schematic construction view illustrating an apparatus of iabricating an optical sheet according to an embodiment of the present invention;
[8] FIGS. 2 through 4 are enlarged views of A, B and C in FIG. 1, respectively;
[9] FIG. 5 is a flow chart sequentially illustrating a method for iabricating an optical sheet according to an embodiment of the present invention; and
[10] FIGS. 6 and 7 are perspective views illustrating an optical sheet according an embodiment of the present invention. Best Mode for Carrying Out the Invention
[11] According to an embodiment of the present invention, there is provided an apparatus of fibricating an optical sheet comprising: a master roll; a mold film including a pattern and rotated by contacting one side of the pattern with at least one portion of the master roll; at least one coating roll for supplying a polymer resin to the pattern of the mold film; at least one squeezing roll for pressing the polymer resin on a suriace of the pattern of the mold film to the inside of the pattern of the mold film to fill the inside of the pattern of the mold film with the polymer resin; a tension control roll for controlling a tension of the mold film to consistently control overall mold film; a uniting roll for uniting the mold film to a transparent member intended to be formed with the pattern of the polymer resin on the master roll; a hardening agent for hardening the pattern of the polymer resin; and a separation roll for separating the mold film from the transparent member formed with the pattern of the polymer resin.
[12] At this time, the mold film may be shaped as a belt, for example.
[13] Also, the coating roll supplies the polymer resin to the pattern of the mold film in a multi-step manner.
[14] The apparatus of iabricating the optical sheet further comprises a resin supply tub placed on a lower portion of the coating roll, and supplying the polymer resin to the coating roll, and the resin supply tub comprises a heating unit for maintaining the polymer resin at a constant temperature.
[15] The apparatus of iabricating the optical sheet further comprises at least one nip roll placed on an upper portion of the coating roll by interposing the mold film, and supporting the mold film.
[16] Furthermore, the apparatus of fibricating the optical sheet of further comprises a resin supply tub that is placed on a lower portion of the squeezing roll and supplies the polymer resin to the squeezing roll. The squeezing roll allows the polymer resin to be filled in the inside of the pattern of the mold film in a multi-step manner.
[17] Also, the hardening agent is a thermosetting agent or an ultraviolet curing agent.
[18] According to another embodiment of the present invention, there is provided a method for iabricating an optical sheet comprising: supplying a polymer resin to a pattern of a mold film while rotating the mold film; compressively pressing the polymer resin placed on a surface of the pattern of the mold film to allow the polymer resin to be filled in an inside of the pattern of the mold film; controlling a tension of the mold film supplied with the polymer resin to consistently adjust overall mold film; uniting the mold film to a transparent member where the pattern of the polymer resin is intended to be formed; hardening the pattern of the polymer resin transferred onto the transparent member; and separating the mold film from the transparent film formed with the pattern of the polymer resin.
[19] At this time, the polymer resin is supplied to the pattern of the mold film in a multi- step manner.
[20] Furthermore, the method for fibricating the optical sheet comprises supporting the mold film when supplying the polymer resin.
[21] In the method for iabricating the optical sheet, the polymer resin is filled in the inside of the pattern of the mold film in a multi-step manner.
[22] According to another embodiment of the present invention, there is provided an optical sheet iabricated using the above-described apparatus of iabricating the optical sheet. Mode for the Invention
[23] Embodiments of the present invention are described in detail in the detailed description and the accompanying drawings. The advantages and features of the present invention and a method of realizing the present invention will be clarified with reference to embodiments which will now be described more fully with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Therefore, in embodiments, detailed description of well-known processing, well-known device structures, and well-known techniques will not be provided to inhibit unclear understanding of the present invention. The present invention is defined by definitions recited in the claims only. In the specification, like reference numerals in the drawings denote like elements.
[24] Spatially opposing words, e.g., the bottom such as below, beneath, and lower versus the top such as above and upper, as used herein are intended to easily describe correlation between one component and the other components as illustrated in the drawings. The spatially opposing words can be construed as terms to include any directions of the components when being used or operated in addition to a direction illustrated in the drawings. For example, if the components shown in the drawings are up-side-down, the components described as being below or beneath the other component can be placed above or upper the other component. Therefore, the illustrative word including the bottom may include both directions of the bottom and the top. The components may fice another direction so that the spatially opposing words can be construed according to the orientation.
[25] Hereinafter, an apparatus of fibricating an optical sheet according to an embodiment of the present invention will be described with reference to FIGS. 1 through 4. FIG. 1 is a schematic construction view illustrating an apparatus of fibricating an optical sheet according to an embodiment of the present invention. FIGS. 2 through 4 views are enlarged views of A, B and C in FIG. 1, respectively.
[26] As illustrated in FIG. 1, the apparatus of fibricating the optical sheet according to the embodiment of the present invention includes a master roll 1110, a mold film 1120, a coating roll 1130, a squeezing roll 1160, a tension control roll 1170, a uniting roll 1180, a hardening agent 1210, and a separation roll 122Q
[27] The master roll 1110 is a rotatable cylindrical roll, which may be formed of a metal or an elastic material. When the master roll 1110 is formed of a metal, a structural steel such as a carbon steel or a tempering steel is included. In case of an elastic material, a heat-resistant silicon rubber or a fluoride rubber may be included.
[28] The mold film 1120 as illustrated in FIG. 2 is placed around an outer periphery of the master roll 11 IQ A pattern is formed to one side of the mold film 1120, and the other side thereof has an even surface so that at least partially contacts the master roll 11 IQ
[29] The mold film 1120 may include a pattern film 1124 on the transparent film 1122 as shown in FIG. 2, or may be integrally formed although not illustrated in the drawing.
[30] Also, an unillustrated friction unit may be further provided to the transparent film
1120 side contacting the mold film 1120 and the master roll 11 IQ Thus, a frictional force between the master roll 1110 and the mold film 1120 is increased to prevent idling between the master roll 1110 and the mold film 112Q
[31] Furthermore, the mold film 1120 may be shaped as a belt, for example. A diameter of the belt-shaped mold film 1120 should be greater than that of the above-mentioned master roll H lQ
[32] The mold film 1120 may have a hemispherically-formed pattern as illustrated in FIG.
2, or may be shaped as a triangular prism that is not illustrated herein. The shape of the pattern is not specially restricted but may complement to the optical sheet according to a pattern intended to be formed.
[33] Also, the mold film 1120 should have a predetermined surface energy to receive polymer resin 1140 supplied to the inside of the pattern of the mold film 1120 using the coating roll 113Q The suriace energy value is a physical property of the mold film 1120 relating to adhesiveness with the polymer resin 114Q That is, a predetermined suriace energy value is required so that the pattern of the mold film 1120 receives the polymer resin 1140 supplied from the coating roll 1130 and minimizes over- flown quantity to an outside of the pattern of the mold film 112Q The suriace energy value of the mold film 1120 can be controlled relative to a kind of the polymer resin 1140, which can be selected from a range of, e.g., εbout 15~65dyne/cm. For example, if the polymer resin 1140 is a fluoride resin, the suriace energy value of the mold film 1120 may be about 30dyne/cm and higher. The pattern film 1124 where the pattern of the mold film 1120 is formed may use silicon resin that satisfies the above-described suriace energy value.
[34] Referring to FIG. 1, the coating roll 1130 is separated from the master roll 1110, and supplies the polymer resin 1140 to the pattern of the mold film 1120 rotated together with the rotation of the master roll 11 IQ At least one coating roll 1130 may be included to the apparatus of fibricating the optical sheet, and the number of the coating rolls 1130 can be adjusted by considering an occupying space of the apparatus of fib- ricating the optical sheet and a supply efficiency of the polymer resin 114Q
[35] Furthermore, since the coating roll 1130 retains the polymer resin 1140 of an objective quantity and again supplies the polymer resin 1140 to the pattern of the mold film 1120, a predetermined suriace hardness value is required. That is, it is required to retain the objective quantity of the polymer resin 1140 from a resin supply tub 1132 disposed to a lower portion of the coating roll 1130, and have the suriace hardness value within the range of supplying the sufficient quantity of the polymer resin 1140 to the inside of the pattern of the mold film 112Q [36] The surface hardness of the coating roll 1140 can be adjusted relative to the kind of the polymer resin 1140 used herein and a material that constitutes the pattern of the mold film 1120, which can be selected within a range of about 10~90Gpa, for example.
[37] If the polymer resin 1140 is polymethylmethacrylate resin and the pattern of the mold film 1120 is formed of polymethylmethacrylate resin, the surface hardness value of the coating roll 1130 may be 10~20Gpa, for example. The coating roll 1130 may be formed of silicon resin that satisfies the foregoing surface energy value.
[38] The resin supply tub 1132 placed under the coating roll 1130 contains the polymer resin 1140 provides a site where the coating roll 1130 contacts the polymer resin 1140 to supply the coating roll 113Q According to another embodiment of the present invention, the resin supply tub 1132 may include a nozzle (not shown) that receives an externally-supplied resin solution to supply the resin solution to the surface of the coating roll 1130
[39] The resin supply tub 1132 may include a heating unit (not shown) for making the polymer resin 1140 be maintained a liquid state having fluidity. A solvent may be used to make the polymer resin 1140 have the fluidity. A temperature of the resin supply tub 1132 may be changed according to the kind of the polymer resin 1140 contained within the resin supply tub 1132, which may be about 20~80°C, for example.
[40] The polymer resin 1140 contained within the resin supply tub 1132 may be a thermosetting resin or an ultraviolet curing resin, which may be any one selected from the group consisting of polymethylmetacrykte resin, polycarbonate resin, polystylene resin, polyprophylene resin, polyethyleneterephthakte resin, polycarbonatevinyl resin, thermoplastic elastomer, silicon resin, fluoride resin and a copolymer of these materials. Besides the polymer resin 1140, the resin supply tub 1132 can further contain additives such as a light diffuser and an antistatic agent.
[41] A nip roll 1150 is a rotatable cylindrical roll, which may be placed on an upper surface of the coating roll 1130 by interposing the mold film 112Q That is, the nip roll 1150 contacts the transparent film 1122 of the mold film 1120 on an opposite side of the coating roll 1130 contacting the pattern 1124 side of the mold film 1120, thereby supporting the mold film 1120 against the coating roll 1130 and prevent a slip of the mold film 112Q
[42] Also, the squeezing roll 1160 may be disposed to additionally provide the polymer resin 1140 to the pattern of the mold film 1120 supplied with the polymer resin 1140 by the coating roll 1130, and may press the mold film 1120 to contact the master roll 1110, so that the polymer resin 1140 placed on the suriace of the mold film 1120 to the inside of the mold film 1120 for completely filling the inside of the pattern of the mold film 1120 with the polymer resin 114Q
[43] The apparatus of fibricating the optical sheet may include at least one squeezing roll
1160, and the number of the squeezing rolls 1160 can be adjusted in view of an occupying space of the apparatus of fibricating the optical sheet and the filling state of the polymer resin 114Q
[44] As illustrated in FIG. 3, the polymer resin 1140 may be filled in the inside of the pattern of the mold film 1120 using the squeezing roll 116Q
[45] Moreover, since the squeezing roll 1160 should retain the objective quantity of the polymer resin 1140 and then fill the polymer resin 1140 in the pattern of the mold film 1120, a predetermined suriace hardness value is demanded. That is, it is required to retain the objective quantity of the polymer resin 1140 from the resin supply tub 1162 disposed under the squeezing roll 1160, and have the suriace hardness value within a range of supplying a sufficient quantity of the polymer resin 1140 into the pattern of the mold film 112Q
[46] The suriace hardness of the squeezing roll 1160 may be adjusted relative to the kind of the polymer resin 1140 used herein and the material constituting the pattern of the mold film 1120, which may be selected from a range of about 10~90Gpa, for example.
[47] If the polymer resin 1140 is polymethylmethacrylate resin and the pattern of the mold film 1120 is formed of polymethylmethacrylate, the suriace hardness value of the squeezing roll 1160 may be about 10~20Gpa. The squeezing roll 1160 may be formed of silicon resin that satisfies the above-described suriace energy value.
[48] The resin supply tub 1162 under the squeezing roll 1160 retains the polymer resin
1140 to provide the site where the squeezing roll 1160 contacts the polymer resin 1140, thereby filling the polymer resin 1140 in the inside of the pattern of the mold film 112Q A heating unit (not shown) may also be provided.
[49] The tension control roll 1170 is a rotatable cylindrical roll, which controls a tension of the mold film 112Q That is, the tension control roll 1170 consistently controls the mold film 1120 when the mold film 1120 encircling the master roll 1110 is loose or unbalanced left and right. The tension control roll 1170 is spaced apart from the master roll 1110 to contact the transparent film 1122 side of the mold film 1120, and is movable up and down and left and right according to the state of the mold film 1120 for controlling the tension.
[50] The uniting roll 1180 is a rotatable cylindrical roll for uniting the mold film 1120 to a transparent member 1190 to transfer the polymer resin 1140 within the mold film 1120 to the transparent member 1190 to which the pattern is intended to be formed.
[51] The uniting roll 1180 is disposed on the master roll 1110 by interposing the mold film 1120 and the transparent member 1190, and presses the transparent member 1190 and the mold film 1120 from the transparent member 1190 side to transfer the polymer resin 1140 within the pattern of the mold film 1120 to the transparent member 119Q
[52] At this time, the transparent member 1190 is supplied to the uniting roll 1180 from a separately provided unwinder roll 1182, and is formed of a film-like transparent material that can transmit light such as polycarbonate resin, polysulfone resin, poly- acrykte resin, polystylene resin, polyvinylchloride resin, polyvinyHcohol resin, poly- norbornene resin, polyester resin, for example.
[53] The uniting roll 1180 applies a pressure at a predetermined force to unite the polymer resin 1140 within the pattern of the mold film 1120 with the transparent member 1190, thereby compressively pressing the polymer resin 1140 of the mold film 1120 and the transparent member 119Q At this time, the compressive pressure of the uniting roll 1180 with respect to the master roll 1110 may be about l~10kgf/cnf, for example.
[54] The hardening agent 1210 hardens the polymer resin 1140 transferred onto the transparent member 1190 to prevent separation of the pattern formed of the polymer resin 1140 from the transparent member 119Q The hardening agent 1210 may be a thermosetting agent or an ultraviolet curing agent, for example. This may be selected in view of the kind of the polymer resin 1140 used.
[55] The polymer resin 1140 is hardened by the hardening agent 1210 so that the intended pattern composed of the polymer resin 1140 is formed on the transparent member 119Q The polymer resin 1140 hardened by the hardening agent 1210 is attached on the transparent member 1190 as illustrated in FIG. 4.
[56] The separation rolls 1220 are a pair of rotatable cylindrical rolls, which separate the mold film 1120 from the optical sheet including the transparent member 1190 attached with the pattern composed of the polymer resin that is hardened by the hardening agent 121Q
[57] Although unillustrated, the apparatus of fibricating the optical sheet may further include a rewinder roll for winding the optical sheet separated using the separation rolls 122Q
[58] Now, a method for iabricating an optical sheet using the apparatus of fibricating the optical sheet according to the above embodiment of the present invention will be described with reference to FIGS. 1 through 5. FIG. 5 is a flow chart sequentially il- lustrating a method for iabricating an optical sheet according to an embodiment of the present invention.
[59] First, polymer resin is supplied to a pattern of a mold film (S 1 of FIG. 5).
[60] As illustrated in FIG. 1, when a master roll 1110 is rotated, a mold film 1120 encircling an outer periphery of the master roll 1110 and at least partially contacting the master roll 1110 is rotated to be supplied with a polymer resin 1140 from a coating roll 1130
[61] At this time, the coating roll 1130 is rotated in a direction counter to that of the master roll 1110, and supplies the polymer resin 1140 provided from a resin supply tub 1132 placed under the coating roll 1130 to the pattern of the mold film 112Q
[62] The polymer resin 1140 supplied to the pattern of the mold film 1120 may be supplied in a multi-step manner through at least one or two squeezing rolls 1160, for example, to fill up the pattern of the mold film 112Q When the polymer resin 1140 is supplied in the multi-step manner, the quantity of blowholes liably included in the polymer resin 1140 can be minimized. Consequently, the quantity of the blowholes incurred within a completed optical sheet can be minimized to characteristics degradation of the optical sheet.
[63] At this time, a temperature of a resin supply tub 1132 may be, e.g., about 20-80, so as to allow the polymer resin 1140 contained therein to maintain a predetermined viscosity of, e.g., 50~5,000cps.
[64] Moreover, a nip roll 1150 placed on an upper portion of the coating roll 1130 is rotated in a direction counter to that of the coating roll 1130 by interposing the mold film 1120 so as to support the mold film 1120 against the coating roll 1130 and prevent a slip of the mold film 112Q
[65] Thereafter, the polymer resin is filled in the inside of the pattern of the mold film (S2 of FIG. 5).
[66] The mold film 1120 supplied with the polymer resin 1140 is pressed to the master roll 1110 using the squeezing roll 1160, so that the polymer resin 1140 existing on a suriace of the mold film 1120 is compressively pressed to be filled in the pattern of the mold film 112Q The squeezing roll 1170 is rotated in a direction counter to that of the master roll 1110, and then is supplied with the polymer resin 1140 from a resin supply tub 1162 placed on a lower portion of the squeezing roll 1160 By doing so, the polymer resin 1140 is additionally filled in the inside of the pattern of the mold film 112Q
[67] The polymer resin 1140 filled in the pattern of the mold film 1120 may be supplied in a multi-step manner using at least one or, e.g., two squeezing rolls 116Q If the polymer resin 1140 is filled in the multi-step manner, the quantity of the blowholes liably included in the polymer resin 1140 can be minimized. Consequently, the quantity of the blowholes included in a completed optical sheet is minimized to prevent the characteristics degradation of the optical sheet.
[68] At this time, a temperature of the resin supply tub 1162 may be, e.g., εbout 20~80°C, so as to allow the polymer resin 1140 contained therein to maintain a predetermined viscosity of, e.g., 50~5,000cps.
[69] Then, a tension of the mold film is controlled to consistently adjust overall mold film
(S3 of FIG. 5).
[70] Under the state that the polymer resin 1140 is filled in the pattern of the mold film
1120, a tension control roll 1170 may be used to consistently adjust overall mold film 112Q At this time, the tension of the mold film 1120 can be controlled by moving a central axis of the rotation up and down and left to right while the tension control roll 1170 is rotated in the direction identical to that of the master roll 1110 in view of the state of the mold film 112Q
[71] Thereafter, the mold film is united to a transparent member where the pattern of the polymer resin is intended to be formed (S4 of FIG. 5).
[72] The polymer resin 1140 filling up to substantially 100% in the pattern of the mold film 1120 is united to the transparent member 119Q The transparent member 1190 is successively supplied to a uniting roll 1180 through an unwind roll 1182.
[73] Then, the uniting roll 1180 presses the transparent member 1190 and the mold film
1120 at a predetermined pressure of, e.g., l~10kgf/cnf while the master roll 1110 and the uniting roll 1180 are rotated in the directions counter to each other by interposing the mold film 1120 and the transparent member 1190 By doing so, the transparent member 1190 and the mold film 1120 are united to transfer the polymer resin 1140 in the pattern of the mold film 1120 to the transparent member 119Q
[74] Subsequently, the polymer resin pattern transferred on the transparent member is hardened (S5 of FIG. 5).
[75] The pattern of the polymer resin 1140 transferred onto the transparent member 1190 is hardened while passing through the uniting roll 1180 and the master roll 1110 to prevent the separation of the pattern of the polymer resin 1140 from the transparent member 1190 As a hardening agent 1210 for hardening the polymer resin 1140, an ultraviolet curing agent or a thermosetting agent may be used, for example. Moreover, the suitable hardening agent 1210 is selected according to a kind of the polymer resin 114Q By performed the hardening, the polymer resin 1140 is attached on the transparent member 1190 as a predetermined pattern.
[76] Thereafter, the transparent member including a hardened polymer resin pattern is separated from the mold film (S6 of FIG. 5).
[77] The hardened polymer resin (1142 of FIG. 4) as the predetermined pattern on the transparent member 1190 is passed through a pair of separation rolls 1220, thereby being separated from the mold film 112Q
[78] An optical sheet completed using the method as described above is wound by a rewinder roll (not shown), and is subjected to processing of a general optical sheet. As illustrated in FIGS. 6 and 7, the optical sheet including the pattern P formed of the polymer resin and the transparent member B and may be a diffusion sheet, a prism sheet, etc., applicable to a backlight assembly of a flat panel display such as a liquid crystal display, for example.
[79] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. Industrial Applicability
[80] An apparatus of iabricating an optical sheet, a method for iabricating an optical sheet, and an optical sheet using the same according to the present invention can be applied to technical fields of a liquid crystal display, a backlight assembly used in the liquid crystal display, and an optical sheet used in the backlight assembly.

Claims

Claims
[1] An apparatus of fibricating an optical sheet comprising: a master roll; a mold film including a pattern and rotated by contacting one side of the pattern with at least one portion of the master roll; at least one coating roll for supplying a polymer resin to the pattern of the mold film; at least one squeezing roll for pressing the polymer resin on a surlace of the pattern of the mold film to the inside of the pattern of the mold film to fill the inside of the pattern of the mold film with the polymer resin; a tension control roll for controlling a tension of the mold film to consistently control overall mold film; a uniting roll for uniting the mold film to a transparent member intended to be formed with the pattern of the polymer resin on the master roll; a hardening agent for hardening the pattern of the polymer resin; and a separation roll for separating the mold film from the transparent member formed with the pattern of the polymer resin. [2] The apparatus of fibricating the optical sheet of claim 1, wherein the mold film is shaped as a belt. [3] The apparatus of fibricating the optical sheet of claim 1, wherein the coating roll supplies the polymer resin to the pattern of the mold film in a multi-step manner. [4] The apparatus of fibricating the optical sheet of claim 1, further comprising a resin supply tub placed on a lower portion of the coating roll, and supplying the polymer resin to the coating roll. [5] The apparatus of fibricating the optical sheet of claim 4, wherein the resin supply tub comprises a heating unit for maintaining the polymer resin at a constant temperature. [6] The apparatus of fibricating the optical sheet of claim 1, further comprising at least one nip roll placed on an upper portion of the coating roll by interposing the mold film, and supporting the mold film. [7] The apparatus of fibricating the optical sheet of claim 1, further comprising a resin supply tub placed on a lower portion of the squeezing roll, and supplying the polymer resin to the squeezing roll. [8] The apparatus of fibricating the optical sheet of claim 1, wherein the squeezing roll allows the polymer resin to be filled in the inside of the pattern of the mold film in a multi-step manner. [9] The apparatus of iabricating the optical sheet of claim 1, wherein the hardening agent is a thermosetting agent or an ultraviolet curing agent. [10] A method for iabricating an optical sheet comprising: supplying a polymer resin to a pattern of a mold film while rotating the mold film; compressively pressing the polymer resin placed on a suriace of the pattern of the mold film to allow the polymer resin to be filled in an inside of the pattern of the mold film; controlling a tension of the mold film supplied with the polymer resin to consistently adjust overall mold film; uniting the mold film to a transparent member where the pattern of the polymer resin is intended to be formed; hardening the pattern of the polymer resin transferred onto the transparent member; and separating the mold film from the transparent film formed with the pattern of the polymer resin. [11] The method for iabricating the optical sheet of claim 10, wherein the polymer resin is supplied to the pattern of the mold film in a multi-step manner. [12] The method for iabricating the optical sheet of claim 10, further comprising supporting the mold film when supplying the polymer resin. [13] The method for iabricating the optical sheet of claim 1, wherein the polymer resin is filled in the inside of the pattern of the mold film in a multi-step manner. [14] An optical sheet fibricated using the apparatus of iabricating the optical sheet according to any one of claims 1 through 13.
PCT/KR2008/004281 2007-07-31 2008-07-22 Apparatus of fabricating optical sheet, method for fabricating optical sheet, and optical sheet fabricated using the same WO2009017319A2 (en)

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KR101362865B1 (en) * 2010-10-15 2014-02-14 제일모직주식회사 Apparatus for Optical Sheet and Method for Preparing the Optical Sheet Using the Apparatus
KR101351616B1 (en) * 2010-11-02 2014-01-15 제일모직주식회사 Apparatus for Optical Sheet and Method for Preparing the Optical Sheet Using the Apparatus
CN102463668A (en) * 2010-11-02 2012-05-23 第一毛织株式会社 Apparatus for optical sheet and method for preparing the optical sheet using the apparatus
KR102311562B1 (en) * 2014-03-20 2021-10-12 미래나노텍(주) Micropattern fabricating device
KR101950925B1 (en) 2017-09-08 2019-02-22 (주)아이링고 Dowel assembly blocks that are easy to assemble and prevent wear
KR102077933B1 (en) * 2018-08-09 2020-02-14 강성국 Method of forming color or patterns on films using ultraviolet and forming apparatus operated by the same
CN115055327A (en) * 2022-07-13 2022-09-16 凯鑫森(上海)功能性薄膜产业股份有限公司 Anti-scraping wire-drawing film and device, preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5003915A (en) * 1988-04-18 1991-04-02 American Bank Note Holographics, Inc. Apparatus for printing and for forming a hologram on sheet material
US5468542A (en) * 1985-12-23 1995-11-21 General Electric Company Method for production of a coated substrate with controlled surface characteristics
KR20050005286A (en) * 2003-07-01 2005-01-13 주식회사 엘지에스 Apparatus of manufacturing optical film and method thereof
KR20050089286A (en) * 2004-03-04 2005-09-08 미래나노텍(주) Apparatus, method and forming mold for producing optical material having minute shape

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100822247B1 (en) * 2002-04-01 2008-04-16 닛토덴코 가부시키가이샤 Optical film and display system
CN100454094C (en) * 2003-12-17 2009-01-21 统宝光电股份有限公司 Optical membrane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5468542A (en) * 1985-12-23 1995-11-21 General Electric Company Method for production of a coated substrate with controlled surface characteristics
US5003915A (en) * 1988-04-18 1991-04-02 American Bank Note Holographics, Inc. Apparatus for printing and for forming a hologram on sheet material
KR20050005286A (en) * 2003-07-01 2005-01-13 주식회사 엘지에스 Apparatus of manufacturing optical film and method thereof
KR20050089286A (en) * 2004-03-04 2005-09-08 미래나노텍(주) Apparatus, method and forming mold for producing optical material having minute shape

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WO2009017319A3 (en) 2009-04-02
KR100887340B1 (en) 2009-03-06

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