WO2013048058A2 - 편광필름의 색상 제어장치 및 제어방법 - Google Patents
편광필름의 색상 제어장치 및 제어방법 Download PDFInfo
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- WO2013048058A2 WO2013048058A2 PCT/KR2012/007509 KR2012007509W WO2013048058A2 WO 2013048058 A2 WO2013048058 A2 WO 2013048058A2 KR 2012007509 W KR2012007509 W KR 2012007509W WO 2013048058 A2 WO2013048058 A2 WO 2013048058A2
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G02B1/105—
Definitions
- the present invention relates to a color control device of a polarizing film, and more particularly, to control the color of a film ("polarizing film") exhibiting polarization characteristics by dyeing and then iodine and potassium to the base film by a continuous process
- a device comprising: a dyeing bath for immersing and washing a washed PVA film in an aqueous iodine solution and an aqueous potassium solution; Complementary tank for immersing and staining PVA film iodine and potassium-stained in an aqueous potassium solution; An element oven for drying a PVA film oriented with iodine and potassium; A four stage oven for drying the dried PVA film in an element oven; And polarized light based on information on the characteristics of the input data measured from the iodine and potassium concentration measuring device of the dye bath, the potassium concentration measuring device of the complementary color tank, and the temperature measuring device of the device oven and the four-stage oven and the characteristics of the PVA film to be put into the
- Polarizing sheet (Polarizing Sheet) or polarizing film (Polarizing Film) generally has a function of converting natural light into polarization, this polarization function is implemented by a material that is dyed to the polarizing plate.
- a liquid crystal display uses an iodine type polarizing film in which iodine is salted as a polarizing material.
- the iodine type polarizing film is produced by dyeing a polyvinyl alcohol (PVA) film using dichroic iodine or a dichroic dye, orientating it in a predetermined direction by a method such as uniaxial stretching, and used in LCDs and the like.
- PVA polyvinyl alcohol
- the unstretched PVA film is uniaxially stretched in an aqueous solution and then immersed in a solution containing iodine and potassium iodide, or the unstretched PVA film is immersed in a solution containing iodine and potassium iodide and then uniaxially stretched.
- the non-stretched PVA film is uniaxially stretched in a solution containing iodine and potassium iodide, or the unstretched PVA film is uniaxially stretched in a dry state and then immersed in a solution containing iodine and potassium iodide to prepare a polarizing film. .
- the PVA film having iodine adsorbed and oriented is post-treated by a method such as water washing or drying to obtain a polarizing film, and a polarizing plate is obtained by laminating a protective film on at least one side of the obtained polarizing film.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- the inventors of the present application have conducted in-depth studies on the characteristics of input data measured from the iodine and potassium concentration meter of a dye bath, the potassium concentration meter of a complementary color tank, and the temperature meter of a device oven and a four-stage oven, and the PVA film to be input into the continuous process.
- Polarizing film color control device to predict the color value of the polarizing film based on the information on the characteristics of the device, the central control unit for controlling the temperature of the element oven and the four-stage oven and the amount of the composition to be added to the dye bath and complementary bath
- the color value is predicted through the characteristics of the PVA film administered for the manufacture of the polarizing film, and accordingly the temperature and composition dosage of each device is adjusted in advance to reduce the material loss of the PVA film and the downtime of the production line. It has been found that it can be minimized and the present invention has been completed.
- the polarizing film color control apparatus as a device for controlling the color of the film (“polarizing film”) that exhibits polarization characteristics by dyeing and then iodine and potassium on the base film by a continuous process,
- a dyeing bath for immersing a washed PVA film in an aqueous solution of iodine and an aqueous potassium solution comprising: a dyeing tank having an iodine concentration meter and a potassium concentration meter for measuring the concentration of iodine and potassium;
- a complementary color bath in which a PVA film in which iodine and potassium are impregnated is immersed in an aqueous potassium solution and dyed comprising: a complementary color tank having a potassium concentration meter for measuring the concentration of potassium;
- An element oven for drying a PVA film oriented with iodine and potassium comprising: an element oven having an element oven temperature measuring device for measuring a temperature of the element oven;
- a four stage oven for drying a PVA film dried in an element oven comprising: a four stage oven having a four stage oven meter for measuring the temperature of the four stage oven;
- the polarizing film color control apparatus according to the present invention, among the factors affecting the color value of the polarizing film, the highest correlation of iodine and potassium concentration of the salt bath, potassium concentration of the complementary bath, and element oven and four-stage oven Based on the temperature data and the information on the characteristics of the PVA film introduced into the continuous process, the color value of the polarizing film is predicted in advance, and according to the predicted color value, the temperature, dye bath and complementary bath of the element oven and the four-stage oven By controlling the input amount of the composition to be added to, for example, compared to the conventional polarizing film color control method for manufacturing a polarizing film through the trial run during PVA film replacement, measuring the chromaticity, and then adjusting the input amount of the composition, etc. There is no consumption of PVA film for commissioning and no need to interrupt the production line, thus reducing the loss of PVA film and improving the line utilization.
- the polarizing film color control apparatus can predict the color value of the polarizing film in advance to adjust the temperature of the element oven and the four-stage oven and the amount of the composition to be added to the dye bath and the complementary color tank in the core of the polarizing film
- the quality of color values, which are optical properties, can be greatly improved.
- the element oven may be composed of two ovens, a first element oven and a second element oven.
- the four-stage oven may consist of four ovens, specifically four ovens are inclined inclined ovens, one-stage ovens, two-stage ovens, and three-stage ovens in parallel configuration. It may be configured as.
- the composition added to the dyeing bath may be made of iodine and potassium.
- the composition added to the complementary tank may be made of potassium.
- the polarizing film color control apparatus is made of a structure further comprising a composition supply device for replenishing the composition to be added to the dye bath and complementary color tank based on the color value prediction result of the central control unit Can be. Therefore, by the composition supply apparatus, the iodine and potassium as the composition can be automatically replenished in the dyeing bath and the complementary bath according to the color value prediction result of the PVA film.
- Color value prediction of the PVA film may be preferably achieved by a PVA film color value prediction model based on Partial Least Squares.
- the partial least-squares method means a method of processing a measurement result by making an appropriate sum of squares based on the measured value and finding a value that minimizes it.
- the PVA film color value prediction model based on Partial Least Squares is, for example, the temperature measured by the temperature meter of the element oven and the four-stage oven, and the concentration measured by the concentration meter of the dye bath and the complementary color bath. It may be a multiple regression model that predicts the color values of the PVA film.
- the PVA film color value prediction model may be configured as a function of the potassium concentration of the complementary bath, the iodine and potassium concentration of the dye bath, the temperature of the two-element oven, and the temperature of the four-stage oven.
- the color value prediction model of the PVA film may be configured by the following equation.
- Color value prediction model of PVA film ax 1 + bx 2 + cx 3 + dx 4 + ex 5 + fx 6 + gx 7 + hx 8 + ix 9 + h
- a, b, c, d, e, f, g, h, and i are regression coefficients derived by the partial least squares method
- h is a constant derived by the partial least squares method.
- the inventors of the present application perform a multiple regression model with nine main variables consisting of the potassium concentration in the complementary color bath, the iodine and potassium concentration in the dye bath, the temperature of two element ovens, and the temperature of four four-stage ovens.
- the correlation coefficient of 0.8037 the color value of the polarized film predicted from a given PVA film has an accuracy of 80% or more compared with the color value of the polarized film measured from such a PVA film could.
- the washing tank for washing the polyvinyl alcohol (PVA) film which is a base film, and the iodine and potassium salted by stretching the PVA film salted with iodine and potassium by the stretching roller It may further comprise a drawing bath for orienting.
- PVA polyvinyl alcohol
- a flush bath may be disposed in front of the dye bath and a draw bath may be disposed in front of the complementary bath.
- the polarizing film color control apparatus may further include a swelling tank for swelling the washed PVA film, and a cleaning tank for washing the dyed PVA film.
- the swelling tank may be disposed in front of the dyeing tank, and the washing tank may be disposed behind the dyeing tank.
- the present invention also provides a polarizing plate prepared by attaching a protective film to the upper and lower surfaces of the polarizing film produced by the polarizing film color control device, respectively.
- the protective film may be preferably triacetyl cellulose (TAC; Triacetyl Cellulose).
- TAC triacetyl cellulose
- the present invention also provides a polarizing film color control method for controlling the color of the polarizing film.
- the polarizing film color control method is a method of controlling the color of a film (“polarizing film") that exhibits polarization characteristics by dyeing and then iodine and potassium on a base film by a continuous process,
- the central control unit is based on the information on the characteristics of the input data measured from the iodine and potassium concentration meter of the dye bath, the potassium concentration meter of the complementary tank, and the temperature meter of the element oven and the four-stage oven and the characteristics of the PVA film introduced into the continuous process.
- a control step of predicting a color value of the polarizing film to control the amount of the composition and the amount of the composition to be added to the dyeing bath and the complementary bath of the element oven and the four-stage oven;
- the polarizing film color control method according to the present invention is added to the iodine and potassium concentration of the dyeing tank, the potassium concentration of the complementary tank, and the temperature data and continuous process of the element oven and four-stage oven that affects the color value of the polarizing film
- the color value of the polarizing film is predicted, thereby controlling the temperature of the element oven and the four-stage oven and the dosage of the composition to be added to the dye bath and the complementary tank, as described above.
- the loss of PVA film can be minimized.
- the PVA film may be dyed by immersing in a dyeing bath containing an aqueous solution of iodine and potassium at a temperature of 20 to 40 °C, PVA film in the drying step in the device oven and 4 conditions But can be dried in an oven.
- the aqueous solution of iodine may be an aqueous solution of 0.01 to 1% by weight and 0.01 to 10% by weight of iodine and potassium iodide, respectively.
- the polarizing film color control method the washing step of washing the polyvinyl alcohol (PVA) film which is the base film, and the iodine dyeing by stretching the PVA film iodine and potassium-dyed with a stretching roller;
- the drawing step of orienting the potassium may be further included.
- the drawing step is made of a first drawing step and a second drawing step according to the change of the rotational speed of the drawing roller, the draw ratio of the PVA film in the first drawing step is 1.5 to 3.0 times, Stretch ratio of the PVA film in the two stretching step may be 2.0 to 3.0 times.
- the PVA film that has undergone the second stretching step may have a total draw ratio of at least 3.5 times or more, and thus, a polarizing film having excellent optical characteristics may be manufactured.
- the polarizing film color control method may further include a swelling step of swelling the washed PVA film in the swelling tank, and a washing step of washing the dye-treated PVA film in the cleaning bath.
- FIG. 1 is a block diagram of a polarizing film color control apparatus according to an embodiment of the present invention.
- FIG. 2 is a flowchart of a polarizing film color control method according to another embodiment of the present invention.
- FIG. 3 is a block diagram of a polarizer color control device according to another embodiment of the present invention.
- FIG. 4 is a graph showing a correlation between a predicted color value and an measured color value according to another embodiment of the present invention.
- 5 is a graph showing the importance of statistical variables for nine main process variables.
- FIG. 1 is a schematic diagram of a polarizing film color control apparatus according to an embodiment of the present invention.
- the polarizing film color control apparatus 90 the dyeing bath 10 for immersing the washed PVA film in an aqueous solution of iodine and potassium, dyeing 10, the PVA film salted with iodine and potassium Complementary color tank 20 to be immersed in the aqueous potassium solution to dye, an element oven 30 for drying the PVA film oriented with iodine and potassium, a four-stage oven 40 for drying the PVA film dried in the element oven, the central control unit ( The composition supply device 50 supplementing the temperature of the element oven 30 and the four-stage oven 40 and the amount of the composition introduced into the dye bath 10 and the complementary color tank 20 based on the color value prediction result of 60. ), And a central control unit 60.
- the PVA film becomes a polarizing film through the dye bath 10, the complementary color tank 20, the element oven 30, and the four-stage oven 40 sequentially.
- the dye bath 10 is provided with an iodine concentration meter 12 and a potassium concentration meter 14 for measuring the concentrations of iodine and potassium (C12, C14), and the concentration of potassium (C22) in the complementary tank 20.
- Potassium concentration measuring instrument 22 for measuring is provided.
- an element oven 30 consisting of two ovens and a four-stage oven 40 consisting of four ovens are provided for measuring oven temperatures T32, T34, T42, T44, T46 and T48.
- Device oven temperature meters 32, 34 and four four-stage oven meters 42, 44, 46, 48 are installed.
- the central control unit 60 controls the iodine and potassium concentration meter 12.14 of the dye bath 10, the potassium concentration meter 22 of the complementary tank 20, and the element oven 30 and the four-stage oven 40.
- Device oven is predicted based on the characteristics of the input data measured from the temperature measuring devices (32, 34, 42, 44, 46, 48) and the characteristics of the PVA film input to the continuous process.
- the temperature of the 30 and the four-stage ovens 40 and the amount of the composition to be added to the dye bath 10 and the complementary color tank 20 are controlled.
- composition to be added to the dye bath 10 is iodine and potassium
- composition to be added to the complementary tank 20 is potassium
- Color value prediction of PVA films is achieved by multiple regression analysis, which is a PVA film color value model based on partial least squares.
- FIG. 2 is a flowchart schematically showing a polarizing film color control method according to another embodiment of the present invention.
- the washed PVA film is immersed and dyed in a salt bath (10) containing an aqueous solution of iodine and potassium, and the concentration of iodine and potassium in the salt bath (10) is measured by an iodine concentration meter (12) and a potassium concentration meter (14).
- Control step 900 for controlling the temperature of the oven 30 and the four-stage oven 40 and the amount of the composition to be added to the dye bath 10 and the complementary tank 20;
- the PVA film is immersed and dyed in a dyeing bath (10) containing iodine and potassium aqueous solution at a temperature of 20 to 40 °C, the PVA film is 40 in 1 drying step (700) and 2 drying step (800) It is dried in the element oven 30 and the four-stage oven 40 under the condition of the temperature of 60 °C.
- FIG. 3 is a schematic diagram of a polarizer color control device according to another embodiment of the present invention.
- the polarizer 108 may include triacetyl cellulose (TAC) on the upper and lower surfaces of the polarizing film 102 drawn by the polarizing film color controller 90 of FIG. 1, respectively; It is prepared by attaching the protective film (104, 106) consisting of Triacetyl Cellulose). TACs drawn from the TAC1 winder 82 and the TAC2 winder 84 are attached to the top and bottom surfaces of the PVA film via the TAC ovens 86 and 88, respectively.
- TAC triacetyl cellulose
- the stretching step 500 includes a first drawing step by the first drawing bath and a second drawing step by the second drawing bath according to the change of the rotational speed of the drawing roller, and drawing of the PVA film in the first drawing step.
- the magnification is 1.5 to 3.0 times
- the draw ratio of the PVA film in the second stretching step is 2.0 to 3.0 times.
- the polarizing film color control device 92 is a washing tank 51 for washing the PVA film drawn out from the polyvinyl alcohol (PVA) unwinder 70 which is a base film, and a swelling tank for swelling the washed PVA film ( 53), a dyeing bath 55 in which the washed PVA film is dipped in an aqueous solution of iodine and an aqueous solution of potassium, and dyeing (55)
- a complementary color tank 56 for immersing and dyeing a PVA film impregnated with iodine and potassium in an aqueous solution of potassium, a cleaning tank 54 for cleaning the salted PVA film, and a device for drying the PVA film oriented with iodine and potassium Oven 57 is included.
- 5 is a graph schematically showing the importance of statistical variables for nine main process variables.
- statistical variables include potassium concentration in the complementary tank, iodine concentration in the salt bath, temperature of the inclined oven, potassium concentration in the salt bath, three stage temperature in the three stage oven, one stage temperature in the three stage oven, and temperature of the element oven 2.
- the temperature of the element oven 1, the temperature of the two-stage oven three stages can be seen to be important.
- bar graph represents the mean value of the variable
- solid line represents the deviation of the variable
- the polarizing film color control apparatus is characterized in the continuous process and the characteristics of the input data measured from the iodine and potassium concentration meter of the dye bath, the potassium concentration meter of the complementary tank, and the temperature measuring device of the element oven and four-stage oven Predicting the color value of the polarizing film on the basis of the information on the characteristics of the PVA film to be added to, to include a central control unit for controlling the temperature of the element oven and the four-stage oven and the amount of the composition to be added to the dye bath and complementary bath
- the material value of the PVA film is lost and produced by predicting the color value through the characteristics of the PVA film administered for the manufacturing of the polarizing film, and adjusting the temperature and composition dosage of each device accordingly. Minimize line downtime and greatly improve the color quality of polarizing films.
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Abstract
Description
Claims (16)
- 연속공정에 의해 기재필름에 요오드와 칼륨을 염착한 후 배향하여 편광 특성을 발휘하는 필름("편광필름")의 색상을 제어하는 장치로서,수세한 PVA 필름을 요오드 수용액과 칼륨 수용액에 침지하여 염색하는 염착조로서, 요오드와 칼륨의 농도를 측정하기 위한 요오드 농도 측정기와 칼륨 농도 측정기를 구비하고 있는 염착조;요오드와 칼륨이 염착된 PVA 필름을 칼륨 수용액에 침지하여 염색하는 보색조로서, 칼륨의 농도를 측정하기 위한 칼륨 농도 측정기를 구비하고 있는 보색조;요오드와 칼륨이 배향된 PVA 필름을 건조하는 소자 오븐으로서, 소자 오븐의 온도를 측정하기 위한 소자 오븐 온도 측정기를 구비하고 있는 소자 오븐;소자 오븐에서 건조된 PVA 필름을 건조하는 4단 오븐으로서, 4단 오븐의 온도를 측정하기 위한 4단 오븐 측정기를 구비하고 있는 4단 오븐; 및상기 염착조의 요오드와 칼륨 농도 측정기, 보색조의 칼륨 농도 측정기, 및 소자 오븐과 4단 오븐의 온도 측정기로부터 측정된 입력 데이터의 특성과 연속공정에 투입되는 PVA 필름의 특성에 대한 정보를 바탕으로 편광필름의 색상값을 예측하여, 소자 오븐 및 4단 오븐의 온도와 염착조 및 보색조에 투입되는 조성물의 투입량을 제어하는 중앙 제어부;를 포함하는 구성으로 이루어진 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 소자 오븐은 2개의 오븐으로 구성되어 있는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 4단 오븐은 4개의 오븐으로 구성되어 있는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 염착조에 투입되는 조성물은 요오드 및 칼륨인 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 보색조에 투입되는 조성물은 칼륨인 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 중앙 제어부의 색상값 예측 결과를 바탕으로 염착조와 보색조에 투입되는 조성물을 보충하기 위한 조성물 공급장치를 더 포함하는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 상기 색상값 예측은 부분 최소 자승법(Partial Least Squares) 기반의 PVA 필름 색상값 예측 모델에 의해 달성되는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 7 항에 있어서, 상기 PVA 필름 색상값 예측 모델은 보색조의 칼륨 농도, 염착조의 요오드 및 칼륨 농도, 2개로 구성된 소자 오븐의 온도, 및 4개로 구성된 4단 오븐의 함수로 구성되어 있는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 8 항에 있어서, 상기 PVA 필름 색상값 예측 모델(y)은 하기 식 1로 구성되는 것을 특징으로 하는 편광필름 색상 제어장치:y = ax1 + bx2 + cx3 + dx4 + ex5 + fx6 + gx7 + hx8 + ix9 + h (1)상기 식에서, x1은 보색조의 칼륨 농도, x2는 염착조의 요오드 농도, x3은 염착조의 칼륨 농도, x4는 경사오븐의 온도, x5는 1단 오븐의 온도, x6은 2단 오븐의 온도, x7은 3단 오븐의 온도, x8은 소자 오븐 1의 온도, x9는 소자 오븐 2의 온도이고, a, b, c, d, e, f, g, h, i의 회귀계수와 상수 h는 부분 최소 자승법에 의해 산출된다.
- 제 1 항에 있어서, 기재필름인 폴리비닐알콜(PVA) 필름을 수세하는 수세조, 및 요오드와 칼륨이 염착된 PVA 필름을 연신롤러에 의해 연신하여 염착된 요오드와 칼륨을 배향시키는 연신조를 추가로 포함하는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 있어서, 수세한 PVA 필름을 팽윤시키는 팽윤조, 및 염착된 PVA 필름을 세정하는 세정조를 추가로 포함하는 것을 특징으로 하는 편광필름 색상 제어장치.
- 제 1 항에 따른 제어장치에 의해 제조된 편광필름의 상면과 하면에 각각 보호필름을 부착하여 제조된 것을 특징으로 하는 편광판.
- 제 12 항에 있어서, 상기 보호필름은 트리아세틸 셀룰로오스(TAC; Triacetyl Cellulose)인 것을 특징으로 하는 편광판.
- 연속공정에 의해 기재필름에 요오드와 칼륨을 염착한 후 배향하여 편광 특성을 발휘하는 필름("편광필름")의 색상을 제어하는 방법으로서,수세한 PVA 필름을 요오드 수용액과 칼륨 수용액이 담긴 염착조에 침지하여 염색하고, 요오드 농도 측정기와 칼륨 농도 측정기가 염착조의 요오드와 칼륨의 농도를 측정하는 염착단계;요오드와 칼륨이 염착된 PVA 필름을 칼륨 수용액이 담긴 보색조에 침지하여 염색하고, 칼륨 농도 측정기가 보색조의 칼륨의 농도를 측정하는 보색단계;요오드와 칼륨이 배향된 PVA 필름을 소자 오븐에서 건조하고 소자 오븐 온도 측정기가 소자 오븐의 온도를 측정하는 제 1 건조단계;소자 오븐에서 건조된 PVA 필름을 4단 오븐에서 건조하고 4단 오븐 측정기가 4단 오븐의 온도를 측정하는 제 2 건조단계; 및중앙 제어부가 상기 염착조의 요오드와 칼륨 농도 측정기, 보색조의 칼륨 농도 측정기, 및 소자 오븐과 4단 오븐의 온도 측정기로부터 측정된 입력 데이터의 특성과 연속공정에 투입되는 PVA 필름의 특성에 대한 정보를 바탕으로 편광필름의 색상값을 예측하여, 소자 오븐 및 4단 오븐의 온도와 염착조 및 보색조에 투입되는 조성물의 투입량을 제어하는 제어단계;로 구성된 것을 특징으로 하는 편광필름 색상 제어방법.
- 제 14 항에 있어서, 상기 제어방법은 기재필름인 폴리비닐알콜(PVA) 필름을 수세하는 수세단계, 및 요오드와 칼륨이 염착된 PVA 필름을 연신롤러에 의해 연신하여 염착된 요오드와 칼륨을 배향시키는 연신단계를 추가로 포함하는 것을 특징으로 하는 편광필름 제조방법.
- 제 14 항에 있어서, 상기 제어방법은 수세한 PVA 필름을 팽윤조에서 팽윤시키는 팽윤단계, 및 염착된 PVA 필름을 세정조에서 세정하는 세정단계를 추가로 포함하는 것을 특징으로 하는 편광필름 제조방법.
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