JP2007122069A - Method of fabricating substrate for display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fabricate a color filter and a black matrix used for a liquid crystal display device etc., with high productivity. <P>SOLUTION: A first light-transmissive film is sent from a first roller, and a second light-transmissive film, having a transparent conductive film formed on its surface, is sent from a second roller; and the second light-transmissive film is bonded to the first light-transmissive film and ink is stuck on the second light-transmissive film by a printing roller to form the color filter. An ultraviolet-ray setting resin film is sent from a third roller and bonded on the second light-transmissive film, where the color filter is formed and the surface side of the first light-transmissive film where the second light-transmissive film is not bonded is irradiated with the light through the color filter as a mask, to expose the ultraviolet-ray setting resin film, thereby forming the black matrix on the second light-transmissive film. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The invention disclosed in this specification relates to a liquid crystal electro-optical device and a method for manufacturing a substrate constituting a light-emitting display such as a plasma display, an electroluminescence display, and a vacuum fluorescent display. For example, the present invention relates to a method for manufacturing a glass substrate constituting a liquid crystal electro-optical device.

  In a liquid crystal display that displays light by controlling transmission or non-transmission of light, or in a display device that utilizes a light emission phenomenon or a fluorescence phenomenon, if a color display is to be performed, a phosphor for emitting light of each color filter is provided. Needed. For example, a liquid crystal electro-optical device that performs color display usually requires three primary color filters.

  The liquid crystal electrical engineering apparatus has a configuration based on a configuration in which a liquid crystal is held between a pair of glass substrates. Generally, the color filter is disposed on a glass substrate on the inner surface (the surface side in contact with the liquid crystal) of the substrate on the display side.

  FIG. 9 shows a manufacturing process of a color filter used in a conventional color display type liquid crystal electro-optical device. First, a color resist film 12 is formed by applying a resist material mixed with a necessary pigment on the glass substrate 11 constituting the liquid crystal electro-optical device. (Fig. 9 (A))

  Next, a photomask 13 is arranged to selectively expose the color resist film 12 in a region where a color filter is to be provided. (Fig. 9 (B))

  Then, the color resist film 12 that has not been exposed is removed to leave the color filter 14 as shown in FIG. In general, three types of color filters, R (red), G (green), and B (blue) are required. Therefore, in general, the steps shown in FIGS. 9A to 9C are repeated three times to form a necessary color filter on the glass substrate 11.

  However, the color filter manufacturing method of the conventional example shown in FIG. 9 is such that the color filter is directly arranged on the glass substrate constituting the liquid crystal electro-optical device, and when the glass substrate is enlarged, the process is large. There is a problem of becoming. In particular, a spinner for applying a color resist and an exposure apparatus for exposing the color resist are large, resulting in an increase in cost.

  In an active matrix type liquid crystal display device or the like, a thin film transistor must be disposed in each pixel, and thus several photolithography processes are required. However, reducing the photolithography process as much as possible can reduce the production cost. Is important for reduction.

  A printing method is known as a technique for producing a color filter by a method that does not use a photolithography process as shown in FIG. However, when the glass substrate is enlarged, the complexity of forming the color filter directly on the large glass substrate is still a problem.

  Further, since the color filter itself is not an independent entity, there is a problem that there is no degree of freedom regarding its use. For example, when liquid crystal electro-optical devices having different sizes and specifications are manufactured (for example, there is no possibility that a liquid crystal television has one type of screen size), a color filter is used for each liquid crystal electro-optical device. It must be formed separately on a glass substrate. This causes an increase in production cost and is not preferable.

  The liquid crystal electro-optical device also needs to form antireflection means over the color filter. However, in addition to the process shown in FIG. An apparatus for forming the (antireflection film) must be made easy, resulting in an increase in production cost.

  Furthermore, in STN type liquid crystal electro-optical devices and the like, in addition to antireflection means, phase compensation means may be required for the purpose of preventing coloring, but in this case as well, a phase compensation film (phase compensation film) An apparatus is required to attach the film), resulting in an increase in production cost.

  An object of the invention disclosed in the present specification is to provide a technique capable of solving the above-described problems and manufacturing a color filter and a phosphor of a display device typified by a liquid crystal electro-optical device at low cost.

  Still another object of the present invention is that the color filter is not integrated as a single unit, but is integrated with an antireflection film or a phase compensation film, and further, is integrated with a black matrix and a transparent electrode. The object is to provide a technique for manufacturing without increasing the production cost.

One of the main inventions disclosed in this specification is:
A material colored in a plurality of colors is printed with a predetermined pattern on a long film having translucency by a printing method.

Other aspects of the invention are:
It is characterized in that a material colored in a plurality of colors is printed in a predetermined pattern by a printing method on a flexible and translucent long film.

  In the above structure, an organic resin film having flexibility can be used as the long film having translucency. In order to use this film as a color filter of a liquid crystal electro-optical device, it is necessary to have an optical characteristic of transmitting visible light. Specifically, PET (polyethylene terephthalate), PES (polystyrene sulfate), and PAR (polyacrylate) can be used.

  It is also useful to use an analyzer used in a liquid crystal electro-optical device as the film. The analyzer has an optical characteristic of transmitting only light linearly polarized in a specific direction, and has an action of taking out a linearly polarized light component in a specific direction in the light transmitted through the liquid crystal. This analyzer is an element that constitutes a liquid crystal electro-optical device. By forming a color filter on the surface of the analyzer and having the analyzer also function as a color filter, the manufacturing cost of the liquid crystal electro-optical device is reduced. It greatly contributes to lowering. It is also possible to form a color filter on the surface of the polarizer instead of the analyzer of the liquid crystal electro-optical device.

Other aspects of the invention are:
A material colored in a predetermined color by a printing method is printed on a predetermined pattern on the film that is fed from a feed roller from which a long film having translucency is wound up,
The printed film is wound up by a receiving roller that winds up the printed film.

Other aspects of the invention are:
A delivery roller on which a long film having translucency is wound;
A receiving roller that winds up the film fed from the feeding roller, and a printing unit that prints a colored material on the film by a printing method between the feeding roller and the receiving roller;
It is characterized by having.

  As a specific example of the above configuration, the configuration shown in FIG. 2 can be given. In FIG. 2, after a long film (PET film) 100 having translucency is sent out from a feed roller 201 wound up and subjected to predetermined printing for forming a color filter, it is applied to a receiving roller 202. A wound configuration is shown. Further, printing means including plate cylinders 101 to 103 and pressure cylinders 104 to 106 is provided between the sending roller 201 and the receiving roller 202.

Further, other configurations of the invention disclosed in this specification are as follows:
A step of continuously printing a material colored in a plurality of colors on a surface of a translucent long film wound around a roller by a printing method in a predetermined pattern;
A step of continuously affixing an antireflection film wound around a roller to the front or back side of the long film;
It is characterized by having.

  As a specific example of the above process, a process shown in FIG. 5 can be exemplified. 5 includes a printing roller 502 to 504 and a pressing roller 592 to 594 on one surface of a PET (polyethylene terephthalate) film 500 which is a light-transmitting film wound around a roller 501. Color filters composed of the three primary colors RGB are continuously formed by a printing method. Thereafter, a configuration in which an antireflection film 516 is pasted on the color filter is shown.

  In the configuration shown in FIG. 5, the example in which the antireflection film is formed on the surface side where the color filter is formed is shown. However, the antireflection film is formed on the surface side opposite to the surface side where the color filter is formed. Also good. In the above configuration, a conductive transparent thin film functioning as a light shielding means such as a phase compensation film, a fluorescent film, a black matrix, or a pixel electrode may be formed instead of the antireflection film.

Other aspects of the invention are:
On the front or back side of the translucent long film wound around the roller,
・ Optical thin film with color filter function ・ Optical thin film with fluorescence function ・ Optical thin film with antireflection function ・ Optical thin film with phase compensation function ・ Optical thin film with light shielding function ・ Translucent thin film with conductivity ・ Adhesion It is characterized in that at least two or more films selected from translucent thin films having a function are continuously attached in one layer or multiple layers.

  In the above configuration, various optical thin films and translucent thin films can be combined according to the required functions. In addition, it is possible to select the order in which the films are laminated and the order in which the films are laminated on which side of the long film.

  A specific example of the above configuration is shown in FIG. In the configuration shown in FIG. 5, an optical thin film having a color filter function of RGB is formed on the surface of a PET film 500 which is a translucent long film by printing rollers 502 to 504 and pressing rollers 592 to 594. Is formed by a printing method, and a structure in which an antireflection film 516 wound around a roller 505 is attached thereon is described.

Other aspects of the invention are:
On the front or back side of the translucent film,
・ Optical thin film with color filter function ・ Optical thin film with fluorescence function ・ Optical thin film with antireflection function ・ Optical thin film with phase compensation function ・ Optical thin film with light shielding function ・ Translucent thin film with conductivity ・ Adhesion It is characterized in that at least two or more films selected from translucent thin films having a function are attached in one layer or multiple layers.

  An example of the configuration having the above configuration is an optical function unit for a display device obtained by the manufacturing process shown in FIG. The optical function means for a display device shown in FIG. 5 includes an optical thin film having a color filter function formed on a PET film 500 by printing rollers 502 to 504 and an optical thin film having an antireflection function composed of an antireflection film 516. It has a stacked configuration.

  Furthermore, examples of the structure having the above structure include optical function means for a display device obtained by a manufacturing process as shown in FIGS. 7 and 8. The optical function means includes a PET film, a color filter, and a black matrix. (BM) and a transparent conductive film are stacked.

Further, other configurations of the invention disclosed in this specification are as follows:
A step of printing a material colored in a plurality of colors on one surface of a long film having translucency with a predetermined pattern by a printing method;
A step of attaching an adhesive film to the other surface of the long film;
Cutting the long film into a predetermined length;
Bonding the long film and the translucent substrate through the adhesive film;
It is characterized by having.

Other aspects of the invention are:
Printing a material colored in a plurality of colors with a predetermined pattern on one surface of a translucent long film wound around the first roller by a printing method;
A process of attaching an adhesive film wound around a second roller to the other surface of the long film;
Cutting the long film into a predetermined length;
Bonding the long film and the translucent substrate through the adhesive film;
It is characterized by having.

Other aspects of the invention are:
A first roller around which a long film having translucency is wound;
Means for printing a material colored in a plurality of colors on one surface of the light-transmitting film with a predetermined pattern by a printing method;
A second roller around which an adhesive film is wound;
Means for attaching an adhesive film wound around a second roller to the other surface of the long film;
Means for cutting the long film into a predetermined length;
Means for bonding the long film and the translucent substrate through the adhesive film;
It is characterized by having.

  FIG. 6 shows a specific configuration of the above invention. In the configuration shown in FIG. 6, an optical thin film having a color filter function of RGB is formed on the surface of a PET film 600 that is a translucent long film by printing rollers 602 to 604 and pressing rollers 692 to 694. Is formed by a printing method. Thereafter, the protective film 616 wound around the roller 605 is attached to the surface of the PET film 600, and at the same time, the adhesive film 609 wound up to the roller 605 is attached to the back surface thereof. Further, the PET film 600 is cut into a predetermined length by the cutter 610 and attached to the glass substrate 613.

  By employing the invention disclosed in this specification, a color filter can be formed as a component independent of a glass substrate by continuously forming a color filter on a translucent and reversible film. Therefore, the degree of freedom for use increases. Further, the color filter itself can be mass-produced with high productivity.

  Further, for example, for a liquid crystal display device, a composite color filter having an antireflection function and a phase compensation function can be obtained at a low production cost. In particular, it is necessary to produce a configuration that combines various optical functions required for display devices typified by color filter function, fluorescence function, antireflection function and phase compensation function, using continuous production means. The means having the optical function can be obtained with high productivity. In addition, a substrate having a color filter, a black matrix, and a transparent electrode can be obtained at a low production cost. This improves the productivity of the display device itself such as a liquid crystal panel and also keeps the production cost low.

  The present embodiment shows a technique for continuously forming a color filter on a resin film serving as a substrate. FIG. 1 shows a color filter manufacturing apparatus shown in this embodiment.

  In this embodiment, an example in which RGB color filters are continuously formed on a PET (polyethylene terephthalate) film by a relief printing method is shown. In this embodiment, three sets of cylindrical plate cylinders are prepared, and R (red), G (green), and B (blue) color filters are formed on the PET film by the relief printing method.

  In the configuration shown in FIG. 1, a predetermined pattern is formed for each of R (red), G (green), and B (blue) in order to form a color filter of three primary colors of RGB on the surface of the PET film 100 as a substrate. Plate cylinders 101 to 103 for printing and pressure cylinders 104 to 106 are provided, respectively. Further, ink rollers 107 to 109 for supplying ink to the plate cylinders 101 to 103 are provided in contact with the plate cylinders 101 to 103, respectively.

  By transferring the PET film 100 between the plate cylinders 101 to 103 and the pressure cylinders 104 to 106, an R color filter, a G color filter, and a B color filter are sequentially printed on the surface of the PET film 100. Formed by law.

  FIG. 1B is an explanatory diagram of the printing process of the R color filter, and is an enlarged view of a contact portion between the plate cylinder 101 and the ink roller 107. The G and B plate cylinders 102 and 103 and the ink rollers 108 and 109 have the same configuration, and only the type of ink is different. As the ink, an organic resin material containing a pigment for forming color filters for R, G, and B is used. As such an organic resin material, various resist materials, resin materials such as polyimide, and other acrylic resins can be used.

  As shown in FIG. 1B, the plate cylinder 101 is formed with a plate image 111 (a convex portion for performing printing). Ink 112 for forming a color filter adheres to the surface of the ink roller 107. When the ink roller 107 and the plate cylinder 101 come into contact with each other, the ink 112 is applied to the plate image 111 on the surface of the plate cylinder 101. The ink roller 107 and the plate cylinder 101 adhere to each other and rotate in opposite directions, whereby the ink 112 is sequentially supplied to the surface of the plate image 104.

  The ink 112 adhering to the surface of the plate image 111 is transferred to the surface of the PET film 100 as the base by the pressure applied by the plate cylinder 101 and the pressure cylinder 103, and the plate cylinder 101 and the pressure cylinder 103 are mutually connected. By rotating in the reverse direction, the PET film 100 is continuously transferred, and the ink 112 is sequentially transferred onto the surface of the PET film 100 in a pattern according to the image pattern of the printing plate 111 to form a color filter. The

  Since the same image pattern is printed each time the plate cylinder 101 rotates, the same image pattern is continuously printed at a predetermined interval on the surface of the PET film 100 as a base. .

  The G and B plate cylinders 105 and 106 and the ink rollers 108 and 109 operate in the same manner. Therefore, when the PET film 100 is transferred, the RGB color filter pattern is continuously printed on the surface of the PET film 100 at predetermined positions.

  Note that the pattern of the color filter can be changed by replacing the plate cylinders 101 to 103 or the plate images arranged on the surfaces of the plate cylinders 101 to 103 and adjusting the distance between the plate cylinders 101 to 103. . Further, the width of the PET film 100 and the dimensions of the plate cylinders 101 to 103 and the pressure cylinders 104 to 106 can be arbitrarily set. Thereby, the dimension of a color filter can be changed suitably.

  As shown in FIG. 2, the PET film 100 is wound up to a length required for the delivery roller 201, and the PET film 100 delivered from the delivery roller 201 has an RGB color filter pattern on its surface. After sequentially printing and forming an RGB color filter, it is wound around the receiving roller 202. The PET film 100 on which the color filter is printed may be cut into a required size and used. Note that the pair of rollers 203 is for allowing the PET film 100 to be transferred at a constant speed.

  The color filter manufacturing method of this embodiment is different from the color filter manufacturing method for each glass substrate, and can easily change the size and pattern of the color filter. .

  In this example, a color filter is formed on a PET film by using an intaglio printing method. In this embodiment, as shown in FIG. 2, a color filter is continuously formed on a ribbon-like (tape-like) substrate. FIG. 3 shows a schematic configuration of the present embodiment. 3A is a schematic configuration diagram of the entire apparatus, and FIG. 3B is an enlarged view of a portion where printing is performed. In this embodiment, a PET film 300 is used as a substrate on which a color filter is formed.

  In FIG. 3A, three sets of configurations for performing printing are shown. This indicates that a configuration for performing printing is provided corresponding to each of RGB. In order to form color filters of the three primary colors of RGB, plate cylinders 301 to 303 and pressure cylinders 304 to 306 are provided in contact with each other for each of R (red), G (green), and B (blue). ing. Furthermore, the plate cylinders 301 to 303 are provided with ink tanks 307 to 309 for supplying ink to the plate cylinders 301 to 303, and doctor blades 310 to 312 for removing excess ink, respectively. The ink tanks 307 to 309 are filled with inks 307R, 308G, and 309B for forming R, G, and B color filters. For the inks 307R, 308G, and 309B, organic resin materials containing pigments can be used. For example, various resist materials, resin materials such as polyimide, and other organic resin materials such as acrylic resins can be used.

  FIG. 3B is an explanatory diagram of the printing process of the R color filter, and is an enlarged view of a contact portion between the plate cylinder 301 and the pressure roller 304. The G and B plate cylinders 302 and 303 and the pressure rollers 305 and 306 have the same configuration.

  Here, the process of forming the leftmost R (red) color filter will be described with reference to FIG. As shown in FIG. 3B, a plate image 321 (configured as a recess into which ink enters) is formed on the surface of the R plate cylinder 301. As the plate cylinder 303 rotates, the ink 307R in the ink tank 307 adheres to the surface of the plate cylinder 301, and the ink 307R enters the recess 321a of the plate image 321.

  As the plate cylinder 301 rotates, the ink 307R adhering to the surface of the plate cylinder 301 is sequentially scraped off by the doctor blade 308 and remains only in the concave portion 321a of the plate image 321. The ink 307 </ b> R that has entered the concave portion 321 a of the plate image 321 is printed as an image pattern 322 on the surface of the PET film 302 by the pressure applied by the pressure cylinder 301.

  By rotating the plate cylinder 301 and the pressure cylinder 304 in opposite directions as indicated by arrows, the PET film 300 is transferred from the left side to the right side, and the image pattern 322 is sequentially printed, and the plate cylinder 301 is moved. By rotating once, an R color filter is formed.

  The G and B plate cylinders 302 and 303 and the pressure rollers 305 and 306 operate in the same manner. After the R color filter is printed, the G color filter and the B color filter are printed sequentially. The

  Note that the pattern of the color filter can be changed by replacing the plate cylinders 301 to 303 or the plate images arranged on the surfaces of the plate cylinders 301 to 303 or adjusting the interval between the plate cylinders 301 to 303. . Further, the width of the PET film 300 and the dimensions of the plate cylinders 301 to 303 and the pressure cylinders 304 to 306 can be arbitrarily set. Thereby, the dimension of a color filter can be changed suitably.

  As described above, the color filter manufacturing method of this embodiment is different from the color filter manufacturing method for each glass substrate, and the size and pattern of the color filter can be easily changed. Therefore, the color filter is highly versatile and used for a wide range of applications. be able to.

  This embodiment shows an example in which a photosensitive acrylic resin is used as an ink material in the configuration shown in Embodiment 1 or Embodiment 2. In the configuration shown in Example 1 or Example 2, when a photosensitive material is used as the ink, it is necessary to irradiate light including a wavelength necessary for fixing printing. For example, when a UV curable resin material is used, it is necessary to fix the print pattern by irradiating with UV light after printing.

  FIG. 4 is a configuration diagram of a color filter manufacturing apparatus according to this embodiment. Although not shown, a color filter printing unit as shown in FIG. 1 or 3 is provided on the left side of the drawing. In this printing means, a film-like substrate 403 on which a pattern is printed with photosensitive ink is transferred in the direction of the arrow, and light 406 including a required wavelength is irradiated from a light source 404 to adhere to a predetermined pattern. The ink thus fixed is fixed to form a color filter. The substrate 403 on which the color filter is formed is sequentially wound around the winding roller 405.

  In this embodiment, an example in which ink is fixed by light irradiation has been shown. However, when using ink that is fixed by applying heat, an appropriate heating means may be provided.

  The present embodiment is an example in which an analyzer used for a liquid crystal display device is used as a substrate in the configuration shown in the first or second embodiment. The analyzer has a function of linearly polarizing incident light in a specific direction, and is disposed on the display side of the liquid crystal display device. In the case where a color filter is formed on the surface of the analyzer, it is possible to reduce the number of components and manufacturing steps in manufacturing a liquid crystal display device, so that the manufacturing cost can be significantly reduced.

  In this example, a color filter printed on a PET (polyethylene terephthalate) film, which is a light-transmitting film (meaning that it transmits at least visible light), is attached to a glass substrate, and the PET film as a substrate. An example of obtaining a configuration in which a color filter is formed is shown.

  FIG. 5 is a schematic configuration diagram of a color filter manufacturing apparatus according to this embodiment, and reference numeral 501 denotes a roller on which a PET film 500 is wound. A necessary amount of the PET film 500 is wound around a roller 501. The PET film 500 wound around the roller 501 is sequentially transferred to the right side by rotating the roller 501 in the direction of the arrow.

  When the PET film 500 passes through printing rollers 502 to 504 and pressure rollers 592 to 594 for printing RGB color filters, a color filter of three primary colors is formed on the PET film 500.

  In order to print the color filter, for example, a relief printing method can be adopted as in the first embodiment. A relief printing plate image may be formed on the surfaces of the printing rollers 502 to 504 as shown in FIG. Here, a mechanism for printing an R (red) color filter will be described. An ink material for printing an R (red) color filter is attached to the plate image on the printing roller 502, and pressure is applied to the PET film 500 between the printing roller 502 and the pressure roller 592. An R (red) color filter is formed on the surface of the PET film 500. Similarly, the printing roller 503 and the pressure roller 593 form a G (green) color filter, and the printing roller 504 and the pressure roller 594 form a B (blue) color filter.

  Here, an example of the relief printing method has been shown, but an intaglio printing method as in the second embodiment can also be adopted. In this case, the printing rollers 502 to 504 are configured as shown in FIG. do it. The pattern of the color filter can be changed by replacing the printing rollers 502 to 504 on which the plate images are formed or the plate images arranged on the surfaces of the printing rollers 502 to 504.

  The anti-reflection film 516 wound around the roller 505 is attached to the surface of the PET film 500 on which the RGB color filter is printed by the pressure applied by the rollers 507 and 508, and at the same time, the back surface is wound around the roller 506. The adhered adhesive film 509 is attached. Then, the surface protective film 524 wound around the roller 521 is attached onto the antireflection film 516 by the pressure applied by the rollers 522 and 523. The surface protective film 524 has a function for flattening the surface of the PET film 500 on which the unevenness is formed by printing a color filter. In this way, a PET film 500 on which a color filter is formed is obtained. The order in which the antireflection film 516 and the surface protection film 524 are formed may be reversed.

  Finally, the PET film 500 is cut into a predetermined size by the cutter 510. In this way, a color filter having the required dimensions and pattern formed on the PET film can be produced.

  The color filter obtained in this example is formed on the PET film 500, and an adhesive layer of the adhesive film 509 is formed on the back surface (the surface opposite to the surface on which the color filter is formed). It can be used as a color filter by adhering to a glass substrate as it is. As the adhesive film 509, a film that exhibits an adhesive effect by heating and pressing may be used. In this case, the PET film 500 can be fixed to the glass substrate by pressing the PET film 500 on which the color filter is formed on the surface of the glass substrate while heating.

  In the manufacturing process shown in this embodiment, the necessary color filter pattern is obtained by replacing the printing rollers 502 to 504 or by replacing the plate images formed on the surfaces of the printing rollers 502 to 504. Can do. Further, the size of the color filter can be easily controlled by changing the width of the PET film 500 and the cutting timing of the cutter 510.

  By adopting the configuration shown in this embodiment, a color filter matched to the size of the glass substrate can be continuously produced with high productivity.

  In this embodiment, a configuration in which an antireflection film is further formed on the color filter is shown. Further, a second antireflection film may be formed on the surface of the PET film on which the antireflection film is formed and on the opposite surface. In this case, an adhesive layer is formed on the second antireflection film.

  In this embodiment, an example of producing a color filter for a liquid crystal electro-optical device has been shown. However, a phosphor for a plasma display device or an electroluminescence display device can also be produced. In this case, an ink material for producing a fluorescent material may be used instead of the ink material for printing the color filter.

  In Example 5, after the color filter was printed on the PET film, up to the step of cutting the PET film was explained. In this example, the PET film was cut and pasted on the glass substrate, and the color filter was cut. The process of obtaining the glass substrate in which is formed is shown.

  FIG. 6 shows an outline of a manufacturing process of a glass substrate with a color filter shown in this example. Reference numeral 601 denotes a roller around which the PET film 600 is wound. The PET film 600 wound around the roller 601 is transferred between the printing rollers 602 to 604 of the RGB color filter and the pressure rollers 692 to 694 by rotating the roller 601 in the direction of the arrow. .

  At this time, an R (red) color filter is formed on the PET film 600 by passing between the printing roller 602 for printing the R (red) color filter and the pressure roller 692. The G (green) color filter is formed by passing between the printing roller 603 for printing the G (green) color filter and the pressure roller 693. Further, the B (blue) color filter is formed by passing between the printing roller 604 for printing the B (blue) color filter and the pressure roller 694. In this manner, three primary color (RGB) color filters are formed on the PET film 600.

  In order to print the color filter, a relief printing method can be adopted as in the first embodiment. In this case, as shown in FIG. 1B, the relief printing is applied to the surface of the printing rollers 602 to 604. A plate image may be formed. Here, for example, a mechanism for printing an R (red) color filter will be described. An ink material for printing an R (red) color filter is attached to the surface of the printing roller 602 of the printing roller 602, and pressure is applied by the printing roller 602 and the pressure roller 692, and the PET film 600 An R color filter is formed on the surface.

  The G and B printing rollers 603 and 604 and the pressure rollers 693 and 694 operate in the same manner, and the G color filter and the B color filter are sequentially printed.

  Here, an example of the relief printing method has been shown, but an intaglio printing method as in the second embodiment can also be adopted. In this case, the printing rollers 602 to 604 are configured as shown in FIG. do it. The pattern of the color filter can be changed by replacing the printing rollers 602 to 604 on which the plate image is formed or the plate images arranged on the surfaces of the printing rollers 602 to 604.

  By pressing the pressure rollers 607 and 608, the surface protective film 616 taken up by the roller 605 is stuck on the surface on which the color filter is printed on the PET film 600, and at the same time, it is wound around the roller 606 on the back surface thereof. The taken adhesive film 609 is attached. The surface protective film 616 has a function of flattening the surface of the PET film 600 on which unevenness is formed by forming a color filter. Thus, a PET film 600 having a color filter formed on one surface and an adhesive layer on the other surface can be obtained.

  Next, the PET film is cut into a predetermined length by the cutter 610. Since the color filter is printed on the surface of the PER film 600 at predetermined intervals, the PET film 600 may be cut at predetermined time intervals. The cut PET film 611 is placed on a glass substrate 613 disposed on the elevator 612. At this time, it is necessary to align the cut PET film 611 and the glass substrate 613 with required accuracy.

  Since the PET film 611 on which the color filter is formed is continuously produced one by one at a predetermined time interval, the glass substrate 613 is transferred one by one by the elevator 612 in accordance with this time, so that the PET film 611 is transferred. Can be continuously placed on the glass substrate 613.

  In this state, the PET film 611 is merely placed on the glass substrate 613, and is not in a fixed state. Therefore, the PET film 611 and the glass substrate 613 are heated and pressurized by the rollers 614 and 615, and the PET film 611 is adhered and fixed on the glass substrate 613 by the action of the adhesive film 609 on the back surface of the PET film 611. To do. Thus, a color filter formed on the glass substrate and having a predetermined RGB pattern can be obtained.

  In the manufacturing process shown in the present embodiment, it is necessary to replace the rollers 602 to 604, replace the plate image formed on the surface of the rollers 602 to 604, and further adjust the interval between the rollers. A color filter pattern can be obtained. Further, the size of the color filter can be easily controlled by changing the width of the PET film 600 and the cutting timing of the cutter 610.

  Therefore, by adopting the configuration shown in this embodiment, a color filter that matches the size of the glass substrate can be produced continuously with high productivity. Note that a quartz substrate or a resin substrate may be used instead of the glass substrate.

  In this embodiment, an example of producing a color filter for a liquid crystal electro-optical device has been shown. However, when producing a substrate for a plasma display device or an electroluminescent display device, instead of printing the material constituting the color filter of the present embodiment, printing is performed using a fluorescent material as an ink, and a required pattern is obtained. A fluorescent material may be formed. In this case, the ink raw material printed by the printing rollers 602 to 604 may be a fluorescent material or a material containing the fluorescent material.

  In Examples 1 to 6, PET (polyethylene terephthalate) was used as the light-transmitting film substrate, but other light-transmitting materials may be used. Generally, it is preferable to use a resin material from the viewpoint of cost and handling. For example, PES (polyethylene sulfate) or PER (polyacrylate) can be used. Since a PET film is easily colored with transmitted light, it is preferable to use a PES film or a PER film.

  This embodiment relates to a configuration in which a color filter, a transparent conductive film, and a black matrix are integrated. FIG. 7 is a schematic configuration diagram of the manufacturing apparatus of this example, and the manufacturing process of the color filter is also shown. As shown in FIG. 7, a long film 702 having translucency serving as a base of a color filter is sent out from a roller 701, and a transparent conductive film, a color filter, and a black matrix (hereinafter, referred to as a black matrix) Abbreviated as BM).

  As the long film 702, it is appropriate to use PES (polyethylene sulfate). In addition, it is appropriate to use PES (polyethylene sulfate) for other light-transmitting films shown in this embodiment. PAR (polyacrylate) can also be used.

  First, on the long film 702 sent out from the roller 701, a long translucent film 704 wound around the roller 703 (in this state, a long film shape) is a pressure roller. It is attached by pressurization by 705 and 706. Note that, similarly to the long film 702, the material of the translucent film 704 may be PES.

  A transparent conductive film is formed on the surface of the translucent film 704 by a sputtering method. Further, an adhesive layer showing an adhesive function is formed on the back surface of the translucent film 704 by applying pressure. For this reason, by applying pressure with the rollers 705 and 706, the translucent film 704 is pressure-bonded onto the long film 702 as a base by the action of the adhesive layer.

  Next, an RGB color filter is formed by a printing method by a roller group 707 corresponding to the three colors RGB.

  A resin film 709 for forming a BM (black matrix) wound around a roller 708 is formed on the surface of the film 702 on which the RGB color filter is formed (in this state, a long film shape is exhibited). Is pasted). On the back surface of the resin film 709, an adhesive layer that exhibits an adhesive action when pressed is formed. For this reason, the resin film 709 for forming BM is adhered to the surface of the color filter by the action of the adhesive layer by the pressure applied by the rollers 710 and 711.

  Next, ultraviolet light for exposure from the exposure device 712 is irradiated, and the resin film 709 at a portion where the ultraviolet light is not blocked by the color filter is exposed and cured.

  For this reason, the resin film 709 for forming the BM needs to be a resin material having an ultraviolet curing property and functioning as a BM and having a light shielding property. Further, the ultraviolet ray for exposure has a wavelength region that transmits both the film 702 and the translucent film 704 that serve as a base, and is shielded by a wavelength region that does not transmit the color filter, or more than a required ratio by the color filter. At the same time, it is necessary to use a resin film 709 that is exposed to ultraviolet rays in such a wavelength region.

  Then, the rollers 713 and 714 remove the BM material not exposed to ultraviolet rays. Unnecessary BM material adhering to the roller 713 is removed by the doctor blade 715. It is important to determine the BM material and the material constituting the surface of the roller 713 so that the unexposed BM material can be removed by the roller 713.

  In this way, a BM (black matrix) is formed around the color filter. That is, a black matrix is formed in a region where no color filter is formed.

  Further, a protective resin film 717 wound around the roller 716 and a resin film 719 for bonding to the substrate wound around the roller 718 are placed on the front and back surfaces of the film 702 by rollers 720 and 721, respectively. A film in which the transparent conductive film, the color filter, and the BM are integrated can be obtained by pressure bonding.

  Further, if necessary, the film 702 in which the transparent conductive film, the color filter, and the BM are integrated is cut into an appropriate size by a cutter 722 and attached to a substrate 723 made of light-transmitting glass or resin. In addition, a translucent substrate in which a transparent conductive film, a color filter, and BM are sequentially laminated is manufactured.

  Each of the above steps proceeds continuously using the long film 702 as a base by rotating the rollers shown in FIG. 7 at a predetermined speed.

  The present embodiment is characterized in that after the color filter is formed, a film with a transparent conductive film is attached on the color filter.

  FIG. 8 is a block diagram of the color filter manufacturing apparatus of this embodiment, and the manufacturing process is also shown. As shown in FIG. 8, an RGB color filter is formed on a long film 802 serving as a base by a printing method using a roller group 803. Thereafter, a film 805 with a transparent conductive film wound around the roller 804 is pressed onto the color filter by the rollers 806 and 807.

  Next, a BM material 809 for forming the BM wound around the roller 808 (in this state, a long film shape) is transferred to the film 805 with a transparent conductive film by the rollers 810 and 811. Crimped on top.

  Further, the exposure unit 812 irradiates ultraviolet rays so that the BM material 809 in a region where no color filter exists is exposed and cured. Then, pressure is applied by the rollers 813 and 814, and the non-photosensitive BM material is attached to the surface of the roller 813, and the excess BM material 809 is removed. Unnecessary BM material 809 adhering to the roller 813 is removed by the doctor blade 815.

  The protective film 817 wound around the roller 816 and the adhesive film 819 wound around the roller 818 are pressure-bonded by the rollers 820 and 821. Further, if necessary, the film 802 in which the transparent conductive film, the color filter, and the BM are integrated is cut to an appropriate size and attached to a transparent glass, resin, or other substrate so that the film is transparent. A light-transmitting substrate in which a conductive film, a color filter, and BM are sequentially stacked is manufactured.

1 is a schematic configuration diagram of a color filter manufacturing apparatus using a relief printing method shown in Example 1. FIG. 1 is a schematic configuration diagram of a substrate transport system of a color filter manufacturing apparatus using a relief printing method shown in Example 1. FIG. FIG. 5 is a schematic configuration diagram of a color filter manufacturing apparatus using an intaglio printing method shown in Example 2; 6 is a schematic configuration diagram of a color filter manufacturing apparatus that fixes printing by light irradiation shown in Example 3. FIG. 6 is a configuration diagram of a color filter manufacturing apparatus according to Embodiment 5. FIG. 6 is a configuration diagram of a color filter manufacturing apparatus according to Embodiment 6. FIG. FIG. 10 is a configuration diagram of a color filter manufacturing apparatus according to Example 7 and a cross-sectional view of the filter for each manufacturing process. FIG. 10 is a configuration diagram of a color filter manufacturing apparatus according to an eighth embodiment and a cross-sectional view of a filter for each manufacturing process. It is a manufacturing process figure of the color filter in a prior art.

Explanation of symbols

100 PET film (film-like substrate)
101-103 Plate cylinder 104-106 Pressure cylinder 107-109 Ink roller 111 Plate image 112 Ink 300 PET film (film-like substrate)
301 to 303 Plate cylinder 304 to 306 Pressurizing cylinder 307 to 309 Ink tank 310 to 312 Doctor blade 321 Plate image

Claims (10)

The first translucent film is sent out from the first roller,
From the second roller, a second translucent film having a transparent conductive film formed on the surface thereof is sent out, and the second translucent film is bonded onto the first translucent film,
A color filter is formed by adhering ink onto the second translucent film by a printing roller;
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film on which the color filter is formed,
The ultraviolet curable resin film is exposed to light by irradiating light using the color filter as a mask from the side of the first translucent film to which the second translucent film is not bonded. A method for manufacturing a substrate for a display device, comprising: forming a black matrix on the translucent film 2. The first translucent film is sent out from the first roller,
From the second roller, a second translucent film having a transparent conductive film formed on the surface thereof is sent out, and the second translucent film is bonded onto the first translucent film,
A color filter is formed by adhering ink onto the second translucent film by a printing roller;
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film on which the color filter is formed,
By irradiating light using the color filter as a mask from the surface side of the first translucent film to which the second translucent film is not bonded, the ultraviolet curable resin film is exposed,
A method for producing a substrate for a display device, wherein a black matrix is formed on the second translucent film by removing the ultraviolet curable resin film on the color filter by a fourth roller. The first translucent film is sent out from the first roller,
From the second roller, a second translucent film having a transparent conductive film formed on the surface thereof is sent out, and the second translucent film is bonded onto the first translucent film,
A color filter is formed by adhering ink onto the second translucent film by a printing roller;
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film on which the color filter is formed,
By irradiating light using the color filter as a mask from the surface side of the first translucent film to which the second translucent film is not bonded, the ultraviolet curable resin film is exposed,
A black matrix is formed on the second translucent film by removing the ultraviolet curable resin film on the color filter by a fourth roller,
From the fifth roller, an adhesive resin film is sent out, and the adhesive resin film is adhered to the surface of the first light transmissive film to which the second light transmissive film is not bonded. A method for manufacturing a substrate for a display device. From the first roller, the first transparent film having flexibility is sent out,
A color filter is formed on the first translucent film by attaching ink to the first translucent film by a printing roller;
A second translucent film having a transparent conductive film formed on the surface thereof is sent out from the second roller, and the second translucent film is formed on the surface of the first translucent film on which the color filter is formed. Adhesive film,
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film,
By irradiating light from the surface side of the first light transmissive film where the color filter is not formed, the ultraviolet curable resin film is exposed to form a black matrix on the second light transmissive film. A manufacturing method of a substrate for a display device, which is characterized in that it is formed. From the first roller, the first transparent film having flexibility is sent out,
A color filter is formed on the first translucent film by attaching ink to the first translucent film by a printing roller;
A second translucent film having a transparent conductive film formed on the surface thereof is sent out from the second roller, and the second translucent film is formed on the surface of the first translucent film on which the color filter is formed. Adhesive film,
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film,
By irradiating light from the side of the first translucent film where the color filter is not formed, the ultraviolet curable resin film is exposed,
A method for producing a substrate for a display device, wherein a black matrix is formed on the second translucent film by removing the ultraviolet curable resin film on the color filter by a fourth roller. From the first roller, the first transparent film having flexibility is sent out,
A color filter is formed on the first translucent film by attaching ink to the first translucent film by a printing roller;
A second translucent film having a transparent conductive film formed on the surface thereof is sent out from the second roller, and the second translucent film is formed on the surface of the first translucent film on which the color filter is formed. Adhesive film,
From the third roller, the ultraviolet curable resin film is sent out, and the ultraviolet curable resin film is adhered onto the second light transmissive film,
By irradiating light from the side of the first translucent film where the color filter is not formed, the ultraviolet curable resin film is exposed,
A black matrix is formed on the second translucent film by removing the ultraviolet curable resin film on the color filter by a fourth roller,
An adhesive resin film is sent out from a fifth roller, and the adhesive resin film is adhered to a surface of the first translucent film on which the color filter is not formed. Method for manufacturing a substrate. In claim 3 or claim 6,
The first translucent film and the second translucent film are cut to a predetermined size after the color filter and the black matrix are formed,
The method for manufacturing a substrate for a display device, wherein the cut film is adhered to the substrate by the adhesive resin film. In any one of Claims 1 thru | or 7,
A method of manufacturing a substrate for a display device, comprising forming a protective resin film on the color filter and the black matrix. In any one of Claims 1 thru | or 8,
The method for manufacturing a substrate for a display device, wherein the first light-transmitting film has a function of polarizing natural light passing therethrough into linearly polarized light. In any one of Claims 1 thru | or 9,
The method for manufacturing a substrate for a display device, wherein the first light-transmitting film is polyethylene sulfate or polyacrylate.

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