JP2010145528A - Method for manufacturing color information display panel and color information display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a color information display panel, by which a color information display panel capable of sufficiently developing an effect of a light-shielding material and giving a sharp display image without an out-of-focus state can be obtained while eliminating number of processes for flattening a color filter, and to provide a color information display panel. <P>SOLUTION: In the method for manufacturing the color information display panel constituted so that at least color filters of three primary colors are arranged on a transparent substrate side of the information display panel capable of displaying a monochromatic image, a color filter substrate having such a laminate structure that a color filter film 13 wherein a rib-like light-shielding material 14 is formed at a transparent film substrate 11 and then primary color filters 12R, 12G, 12BL are formed on the surface where the light-shielding material is stuck onto the surface where a transparent electrode of a display side substrate 2 which is colorless and transparent and has the transparent electrode 6 formed thereon, is not formed, by disposing a colorless transparent adhesive 15 on the color filter face, so that the light-shielding material and the primary color filters are arranged in the same layer and outside the transparent substrate, is used. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a display medium via a color filter of each color disposed on a viewing side substrate of a monochrome display system display panel having a configuration in which two types of monochrome display media are sealed between two opposing substrates at least one of which is transparent. This relates to a color information display panel in which the monochrome information image displayed by the above is displayed in color.

  As an information display device that replaces a conventional liquid crystal display device (LCD), a display medium such as particles is used, and the visibility of seeing what is drawn on paper using the technology of visually recognizing with reflected light from the display medium Obtained information display devices have been proposed. Compared to LCDs, these technologies have advantages such as a wide viewing angle close to that of ordinary printed materials, low power consumption, and a memory function. Therefore, it is expected to be applied to portable terminal information display devices, electronic paper type information display devices, and the like. Recently, among the particle transfer methods (charged particle gas transfer method, charged particle liquid electrophoresis method, charged two-color particle rotation method, etc.), the charged particles are encapsulated in a microcapsule together with the dispersion as a dispersed particle. Charged particle in-liquid electrophoresis system configured between opposing substrates, and charged particle in-gas transfer system configured in a gas space between opposing substrates configured as a particle group containing charged particles Has been proposed.

  Among them, a space formed between two opposing substrates, at least one of which is transparent, is configured as a particle group including particles having at least an optical reflectance and a charging property, and has an optical reflectance and a charging characteristic. An information display panel for displaying information such as images by enclosing at least two different types of display media and applying an electric field to the display media to reversely display the display media is a memory that can remain displayed even when the power is turned off. Therefore, it is expected as a low power consumption display device.

  A color liquid crystal display in which a color filter is combined with a liquid crystal display (LCD) is known in order to perform color display in the various information display devices described above (see, for example, Patent Document 1). A color display combined with a filter is also known. In addition, a color information display panel having a configuration in which a color filter is formed on a display surface side substrate of an information display panel using a white display medium and a black display medium is also known (for example, Patent Documents 2 and 3). reference).

JP 2002-303716 A JP 2007-322782 A JP 2007-322784 A

  Among the conventional color information display panels, in the color type information display panel disclosed in Patent Document 1, a black light shielding material (black matrix), a white light shielding material (white matrix), and a display surface side substrate are provided. Since the planarizing layer was disposed after the color filters (R, G, B) were provided, and the transparent electrode (transparent conductive film) was formed thereon, there were problems in terms of productivity due to the man-hours required.

  Further, in the color type information display panel disclosed in Patent Documents 2 and 3, a color information display panel is obtained by forming color filters (R, G, B) outside the display surface side substrate. However, when a black light shielding material (black matrix) or a white light shielding material (white matrix) is provided, it is placed between the partition wall and the display surface side substrate and is located away from the color filter, so that the image is clear. There was a problem that the display image was blurred without being able to exhibit. Also in this case, it is necessary to arrange a protective film for protecting the formed color filter on the color filter, which is also a problem that requires a lot of man-hours.

  The object of the present invention is to eliminate the above-mentioned problems, eliminate the man-hours for flattening the color filter, and to provide a color information display panel that can sufficiently exhibit the effect of the light shielding material and obtain a clear display image without blurring. It is an object of the present invention to provide a method for producing a color information display panel and a color information display panel that can be obtained.

  According to a first aspect of the method for producing a color information display panel of the present invention, a white display medium and a black display medium are arranged in a space formed between two opposing substrates with electrodes at least one of which is transparent. A method for manufacturing a color information display panel having a configuration in which at least three primary color filters are arranged on the transparent substrate side of an information display panel for displaying an information image in black and white by moving a medium. For information display where a transparent electrode is formed by forming a color filter film with three primary color filters on the surface on which the light shielding material is formed and a colorless transparent adhesive on the color filter surface. The panel is attached to the surface of the transparent substrate on which the transparent electrode is not formed, and the shading material and the three primary color filters are on the same layer and placed outside the transparent substrate. Is characterized in that a color filter substrate and a laminated structure that.

  According to a second aspect of the method for producing a color information display panel of the present invention, a white display medium and a black display medium are disposed in a space formed between two opposing substrates with at least one transparent electrode. A method for manufacturing a color information display panel having a configuration in which at least three primary color filters are arranged on a transparent substrate side of an information display panel for displaying an information image in black and white by moving a medium, wherein the information image is displayed in black and white. After forming a rib-shaped light shielding material on a transparent film base material on the outer surface of the display surface side transparent substrate of the information display panel, a color filter film having a primary color filter formed on the surface on which the light shielding material is formed. , Laminated colorless transparent adhesive is placed on the color filter surface and the light shielding material and the three primary color filters are the same layer and placed outside the transparent substrate It is characterized in that the granulation.

  Further, as a preferred example in the first and second inventions of the method for producing a color information display panel of the present invention, the light shielding material is a black light shielding material, a white light shielding material, or a black light shielding material. And a white light shielding material in combination, and a photolithographic material in which the light shielding material is laminated with a resist film having a predetermined color and a predetermined thickness, and then exposed and developed to form a predetermined rib shape. The three primary colors of the three primary color filters are red (R), green (G), blue (B), or cyan (C), magenta (M), yellow (Y) In addition to the three primary colors, a colorless transparent color (T) is provided as a color filter color.

  The color information display panel of the present invention is a color information display panel manufactured by the above-described method for manufacturing a color information display panel, wherein the display surface side transparent substrate has a thickness t1 of 25 μm to 200 μm, and An interval t0 is provided between the three primary color filter and the outer periphery of the pixel in the layer in which the three primary color filters and the light shielding material are arranged, and the interval t0 is perpendicular to the thickness t1 of the display surface side transparent substrate and the position where the interval is provided. A color filter having a smaller area than the pixel, which satisfies 0.3 × L ≧ t0 ≧ 0.02 × t1 in relation to the length L of the square dot pixel side corresponding to the correct position, is provided. It is what.

  As a preferred example of the color information display panel of the present invention, the white display medium is a white display medium configured as a particle group including white particles having charging properties, and the black display medium is the white particles. May be a black display medium configured as a particle group including black particles having different polar chargeability.

  According to the present invention, the color filter and the color filter on the surface on which the transparent substrate electrode (conductive film) on the observation side of the information display panel on which the transparent electrode for pixels or the transparent conductive film for pixels is formed are not formed. The color filter film on which the black or white light-shielding material is formed is bonded to the panel substrate (transparent substrate) on the viewing side of the information display panel using a colorless and transparent adhesive on the color filter surface. A color display information display panel using a color filter substrate having a laminated structure in the order of transparent electrode for pixel (transparent conductive film for pixel) / panel substrate / light shielding material and color filter / color filter film substrate Or the observation side panel substrate of the information display panel has a laminated structure configured in the same order as described above. Since the filter and the light-shielding material have the same layer structure, the effect of the light-shielding material can be fully exerted, and a color information display panel that can produce a clear display image without blurring and a color filter that is flat It can be obtained without the man-hours to do.

  In addition, according to the present invention, the thickness t1 of the display surface side substrate is 25 μm to 200 μm, preferably 25 μm to 100 μm, and the color filter is arranged so that there is a space between the color filter and the outer periphery of the pixel. As the film is bonded, a space t0 is provided between each color filter in the color filter layer and the outer periphery of the pixel, and the space t0 is perpendicular to the thickness t1 of the display surface side substrate and the position where the space is provided. Since a color filter having a smaller area than the pixel is formed and provided so that 0.3 × L ≧ t0 ≧ 0.02 × t1 in relation to the length L of the rectangular dot pixel side corresponding to the position. Even when viewed from an oblique direction, it is no longer possible to see the reflected light from the display medium in the adjacent pixel through the color filter, resulting in a problem of color mixing. No longer, with improved color display image quality.

  Further, according to the present invention, the color filter film in which the light shielding material and the color filter are formed on the same surface on the surface opposite to the surface on which the electrode of the display surface side transparent substrate on which the pixel electrode is formed is formed. Therefore, a configuration in which the distance between the light shielding material and the color filter is not separated can be easily achieved. The color filter and the light shielding material can be formed on the same film, and the process can be simplified compared to the conventional method, thereby improving productivity. In addition, after forming an information display panel structure capable of displaying black and white images, a color filter film in which a light-shielding material and a color filter are formed on the same surface is bonded to the outside of the display surface side transparent substrate. It can be used as a type information display panel.

  Furthermore, according to the present invention, the film substrate of the color filter film is configured to be the outermost layer of the color information display panel, and the color filter has a structure protected by the film, and the color filter is damaged. Disappears.

  First, as an example of the configuration of the information display panel to be provided with the color filter of the color information display panel of the present invention, an information display panel using a particle group containing chargeable particles as a display medium will be described. In the information display panel, an electric field is applied to a display medium sealed between two opposing substrates. Along with the applied electric field direction, the display medium is attracted by an electric field force or a Coulomb force, and the display medium is moved by a change in the electric field direction, whereby information such as an image is displayed. Therefore, it is necessary to design the information display panel so that the display medium can move uniformly and maintain the stability when the display information is rewritten or when the display information is continuously displayed. Here, as the force applied to the particles constituting the display medium, in addition to the force attracting each other by the Coulomb force between the particles, an electric mirror image force between the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.

  1A, 1B, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2A, 2B, 2A, 2B, 2A, 2B, 2A, 2A, A description will be given based on b).

  In the example shown in FIGS. 1A and 1B, a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium configured as a particle group including positively charged black particles 3Ba. 3B, in each cell formed by the partition walls 4, the electrode 5 provided on the substrate 1 (pixel electrode with TFT) and the electrode 6 provided on the substrate 2 (common electrode) face each other. The pixel electrode pair to be formed is moved vertically with respect to the substrates 1 and 2 in accordance with an electric field generated by applying a voltage. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 1A, or the black display medium 3B is visually recognized by the observer as shown in FIG. 1B. Are displayed in a matrix with black and white dots. A color information display panel can be obtained by associating pixels (dots) with cells and arranging the three primary color filters on the substrate 2 side corresponding to the cells. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 2A and 2B, a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium configured as a particle group including positively charged black particles 3Ba. 3B is a pixel electrode pair formed by crossing the line electrode 6 provided on the substrate 2 and the line electrode 5 provided on the substrate 1 so as to cross each other in each cell formed by the partition walls 4. The substrate is moved perpendicularly to the substrates 1 and 2 in accordance with an electric field generated by applying a voltage. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 2A, or the white display is displayed by the observer, or the black display medium 3B is visually recognized by the observer as shown in FIG. 2B. Are displayed in a matrix with black and white dots. A color information display panel can be obtained by associating pixels (dots) with cells and arranging the three primary color filters on the substrate 2 side corresponding to the cells. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted.

  Next, an example of a method for manufacturing a color information display panel according to the present invention will be described with reference to FIGS. 3 (a) to 3 (c) to 6 (a) to 6 (c).

  FIGS. 3A to 3C are views for explaining an example of a method for manufacturing a color information display panel according to the first invention of the present invention. First, as shown in FIG. 3A, a rib-shaped black light shielding material (black matrix) is formed by a photolithographic method on a transparent film substrate 11 made of a colorless transparent film, and then a color filter 12R by various printing methods. (Red color filter), 12G (green color filter), and 12BL (blue color filter) are formed. The color filters 12R, 12G, and 12BL have a smaller area than the pixels, and a predetermined gap is provided between the color filters 12R, 12G, and 12BL and the rib-like black light shielding material 14. Thereby, the color filter film 13 in which the color filters 12R, 12G, and 12BL and the rib-like black light shielding material 14 are formed on one same surface of the transparent film substrate 11 is obtained. At the same time, as shown in FIG. 3B, a transparent substrate 2 on which a transparent electrode 6 serving as a pixel electrode is formed with a patterned transparent conductive film is prepared. Thereafter, as shown in FIG. 3C, a transparent adhesive 15 is disposed on the color filters 12R, 12G, 12BL and the rib-shaped black light shielding material 14 of the color filter film 13, and the color filter film 13 is placed on a transparent substrate. 2 is bonded to the surface opposite to the side where the transparent electrode 6 is provided. As the transparent film substrate 11, a transparent resin film or a transparent glass film can be used.

  In this example, the rib-shaped black light shielding material is disposed and formed between the pixels, and the color filter is formed to be smaller than the pixels. Further, as shown in FIG. 3C, the gap t0 between the color filter and the pixel corresponding area is relative to the thickness t1 (200 μm ≧ t1 ≧ 25 μm) of the transparent substrate and the length L of one side of the square pixel. 0.3 × L ≧ t0 ≧ 0.02 × t1. Here, the value of t0 is set to 0.3 × L or less because if it is larger than 0.3 × L, the coloring effect by the color filter with respect to the reflected light from the display medium becomes insufficient, and appropriate color light can be obtained. This is because there may not be. The reason why the value of t0 is 0.02 × t1 or more is that if it is less than 0.02 × t1, color mixing may be seen when viewed from an oblique angle of 45 degrees. In addition, although the example of the black light shielding material was shown, it can also be set as a white light shielding material.

  FIGS. 4A to 4C are diagrams for explaining another example of the method for manufacturing the color information display panel according to the second invention of the present invention. In the example illustrated in FIGS. 4A to 4C, the same members as those illustrated in FIGS. 3A to 3C are denoted by the same reference numerals, and description thereof is omitted. The example shown in FIGS. 4A to 4C is different from the example shown in FIGS. 3A to 3C in that a white light shielding material 16 is used instead of the black light shielding material 14, and a white light shielding material. 16 is not provided at all positions between the color filters 12R, 12G, and 12BL, and the white light shielding material 16 is formed only at both ends of the color filters 12R, 12G, and 12BL, and for information display that can perform monochrome display The color filter film is attached to the outside of the transparent substrate on the observation side of the panel. Other configurations, operations, and effects are the same as those shown in FIGS. 3 (a) to 3 (c). In addition, although the example of the white light shielding material was shown, it can also be set as a black light shielding material.

  FIGS. 5A to 5C are views for explaining an example of a method for manufacturing a color information display panel according to the first invention of the present invention. First, as shown in FIG. 5A, a rib-shaped black light shielding material (black matrix) is formed on a transparent film substrate 11 made of a colorless transparent film by a photolithography method, and then the color filter 12R ( A red color filter), 12G (green color filter), and 12BL (blue color filter) are formed in a stripe shape. The color filters 12R, 12G, and 12BL have a smaller area than the pixels, and a predetermined gap is provided between the color filters 12R, 12G, and 12BL and the rib-shaped black light shielding material 14 provided only on both sides. And the color filter film 13 which formed the color filters 12R, 12G, and 12BL and the rib-shaped black light-shielding material 14 of those both sides on the one surface of the transparent film base material 11 by predetermined spacing is obtained. At the same time, as shown in FIG. 5B, a transparent electrode 6 serving as a pixel electrode is formed of a patterned transparent conductive film, and a partition wall 17 for forming a cell for accommodating a display medium is formed at all positions between the transparent electrodes 6. The provided transparent substrate 2 is prepared. Then, as shown in FIG.5 (c), the transparent adhesive 15 was arrange | positioned on the color filters 12R, 12G, and 12BL of the color filter film 13, and the electrode 6 of the transparent substrate 2 was provided in this color filter film 13. Affix to the opposite surface. At this time, the rib-like black light shielding material 14 is located on both sides of the striped color filters 12R, 12G, and 12BL, but as shown in FIG. 5C, between the color filters and between each color filter and the rib-like black light shielding material. It is comprised so that a clearance gap may be provided between.

  In this example, the rib-like black light shielding material is disposed and formed so as to fill the gaps between the pixels, and the color filter is formed so as to be smaller than the pixels. Further, as shown in FIG. 5C, the gap t0 between the color filter and the pixel corresponding area is relative to the thickness t1 (200 μm ≧ t1 ≧ 25 μm) of the transparent substrate and the length L of one side of the square pixel. 0.3 × L ≧ t0 ≧ 0.02 × t1. Here, the value of t0 is set to 0.3 × L or less because if it is larger than 0.3 × L, the coloring effect by the color filter with respect to the reflected light from the display medium becomes insufficient, and appropriate color light can be obtained. This is because there may not be. The reason why the value of t0 is 0.02 × t1 or more is that if it is less than 0.02 × t1, color mixing may be seen when viewed from an oblique angle of 45 degrees. In addition, although the example of the black light shielding material was shown, it can also be set as a white light shielding material.

  FIGS. 6A to 6C are views for explaining another example of the method for manufacturing the color information display panel according to the second invention of the present invention. In the example shown in FIGS. 6A to 6C, the same members as those shown in FIGS. 5A to 5C are denoted by the same reference numerals, and the description thereof is omitted. 6 (a) to 6 (c) is different from the example shown in FIGS. 5 (a) to 5 (c) in that a white light shielding material 16 is used instead of the black light shielding material 14, and a rib-like white color is used. The point that the light shielding material 16 is formed at all positions between the dot-shaped color filters 12R, 12G, and 12BL, and the point that the color filter film is pasted on the outside of the observation side transparent substrate of the information display panel that can perform monochrome display. . Other configurations, operations, and effects are the same as those shown in FIGS. 5 (a) to 5 (c). Although the example of the white light shielding material was shown, it can also be a black light shielding material.

  Next, the color filters 12R, 12G, and 12BL are arranged outside the panel substrate 6 on the display surface side, and the black light shielding material 14 is arranged inside, so that the color filter and the black light shielding material are separated in the vertical direction of the panel substrate. The conventional example existing in different layers and the example of the present invention in which the color filters 12R, 12G, 12BL and the rib-shaped black light-shielding material 14 are arranged in the same layer outside the panel substrate 6 on the display surface side are slanted. The display status when viewed from above will be described in comparison. FIGS. 7A and 7B are views for explaining an example of a conventional color information display panel and an example of a color information display panel according to the present invention. FIG. 7 (a), which illustrates a problem when viewed obliquely in the conventional example, shows that the positional relationship between the black light shielding material 14 and the color filters 12R, 12G, and 12BL is not determined by the angle and is not clearly visible. On the other hand, it can be seen from FIG. 7 (b) that illustrates the oblique viewing in the example of the present invention, that the positional relationship between the black light shielding material 14 and the color filters 12R, 12G, and 12BL looks clear without being influenced by the angle.

  Next, an example of the panel configuration of the color information display panel manufactured by the above-described method for manufacturing a color information display panel of the present invention will be described.

  8 (a) to 8 (c), 9 (a) to 9 (c), 10 (a) and 10 (b), and 10 (a) and 10 (b) respectively show the color information display panel of the present invention. It is a figure for demonstrating an example of the panel structure of the color information display panel produced with a manufacturing method. In these drawings, the same members as those in the examples shown in FIGS. 1A, 1B to 7A, 7B are denoted by the same reference numerals, and the description thereof is omitted.

  In the example shown in FIGS. 8A to 8C, FIG. 8A shows a plane of one display unit in the color information display panel, and FIG. 8B shows the AA line in FIG. 8C shows a cross section taken along line BB in FIG. 8A. In this example, an example of one display unit in which the cell forming portion 4-2 for forming four cells is provided inside the inter-substrate gap securing portion 4-1 of the partition wall 4 is shown. One electrode pair formed by orthogonally intersecting the line electrodes 5, 6 is associated with the color filters 12R, 12G, 12BL and the transparent filter 12T on the color filter film 13. A partition wall 4 (inter-substrate gap securing portion 4-1 and cell forming portion 4-2) is formed on the back panel substrate 1 side having the line electrode 5, and at least the inter-substrate gap securing portion 4 of the partition wall 4. The display surface side panel substrate 2 and the adhesive 21 are joined together at -1. Further, the black light shielding material 14 is provided around one pixel constituted by four RGBT color filters corresponding to the pixel.

  In the example shown in FIGS. 9A to 9C, FIG. 9A shows a plane of one display unit in the color information display panel, and FIG. 9B shows the AA line in FIG. 9A. 9C shows a cross section taken along line BB in FIG. 9A. In this example, an example of one display unit in which the cell forming portion 4-2 for forming four cells is provided inside the inter-substrate gap securing portion 4-1 of the partition wall 4 is shown. One electrode pair formed by orthogonally intersecting the line electrodes 5 and 6 and the color filters 12R, 12G, and 12BL on the color filter film 13 are associated with each other. A partition wall 4 (inter-substrate gap securing portion 4-1 and cell forming portion 4-2) is formed on the display surface side panel substrate 2 side having the line electrode 6, and at least the inter-substrate gap securing portion of the partition wall 4. It is bonded to the back side panel substrate 1 with an adhesive 21 in 4-1. Further, the white light shielding member 16 is provided around one pixel composed of four color filters for each color of RGBT corresponding to the pixel pixel.

  In the example shown in FIGS. 10A and 10B, FIG. 10A shows a plane of one display unit (portion surrounded by a broken line in the drawing) in the color information display panel, and FIG. The cross section which followed the AA in 10 (a) is shown. In this example, an example of one display unit in which the cell forming portion 4-2 for forming three rectangular cells is provided inside the inter-substrate gap securing portion 4-1 of the partition wall 4 is shown. One electrode pair formed by orthogonally intersecting the line electrodes 5 and 6 and the color filters 12R, 12G, and 12BL on the color filter film 13 are associated with each other. A partition wall 4 (inter-substrate gap securing portion 4-1 and cell forming portion 4-2) is formed on the back panel substrate 1 side having the line electrode 5, and at least the inter-substrate gap securing portion 4 of the partition wall 4. The display surface side panel substrate 2 and the adhesive 21 are joined together at -1. Further, the black light shielding material 14 and each color filter are formed in a stripe shape, and a gap of a predetermined interval t0 is formed between the color filter and the black light shielding material.

  In the example shown in FIGS. 11A and 11B, FIG. 11A shows a plane of one display unit (portion surrounded by a broken line in the drawing) in the color information display panel, and FIG. The cross section along the AA line in 11 (a) is shown. In this example, an example of one display unit in which the cell forming portion 4-2 for forming three rectangular cells is provided inside the inter-substrate gap securing portion 4-1 of the partition wall 4 is shown. One electrode pair formed by orthogonally intersecting the line electrodes 5 and 6 and the color filters 12R, 12G, and 12BL on the color filter film 13 are associated with each other. A partition wall 4 (inter-substrate gap securing portion 4-1 and cell forming portion 4-2) is formed on the back panel substrate 1 side having the line electrode 5, and at least the inter-substrate gap securing portion 4 of the partition wall 4. The display surface side panel substrate 2 and the adhesive 21 are joined together at -1. Further, the white light shielding material 16 and each color filter are formed in a stripe shape, and a gap of a predetermined interval t0 is formed between the color filter and the white light shielding material.

  Next, a preferred example of the panel configuration of the color information display panel manufactured by the above-described method for manufacturing a color information display panel of the present invention will be described.

  As preferred examples of the color information display panel which is the subject of the present invention, three color filters of R: red, G: green, B: blue, C: cyan, M: magenta, and Y: yellow Are arranged in each pixel, and these three pixels constitute a display unit pixel, or there are four pixels, one pixel (transparent filter) adjacent to the three pixels and no color filter arranged, and the display unit pixel. To form a 2 × 2 pixel array.

  In the color information display panel that is the subject of the present invention, the color filter layer is formed on the film substrate surface by using a flexographic printing method, an ink jet printing method, or a photolithography method, and the color filter layer is observed on the information display panel. The side transparent substrate is bonded to be in contact with the outside. As the transparent film substrate for forming the light shielding material and the color filter, a film-like glass sheet or a transparent resin sheet such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polymethyl methacrylate (PMMA) is preferably used.

  A dry film resist material is preferably used as a material for forming a light blocking material, a partition wall provided for securing a gap between substrates, or a partition wall dedicated for cell formation. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used. A dry film resist material of the same thickness as the color filter or slightly higher than the thickness of the light-shielding material to be formed in a rib shape is laminated on the film substrate, or the height of the partition wall part to be formed A dry film resist material having a combined thickness is laminated on the panel substrate, and patterned by a photolithography method using a photomask having a predetermined shape.

  The width of the partition wall portion for securing the gap between the panel substrates is in the range of 20 μm to 100 μm, the width of the partition wall portion dedicated for cell formation is in the range of 5 μm to 30 μm, and the width of the partition wall portion dedicated for cell formation is between the panel substrates. It is preferable to make it smaller than the width of the partition for securing the gap.

  As the electrode material of the electrodes arranged opposite to each other, as the transparent electrode provided on the transparent substrate side, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin Examples thereof include transparent conductive metal oxides such as oxide (ATO), conductive tin oxide, and conductive zinc oxide, and transparent conductive polymers such as polyaniline, polypyrrole, and polythiophene.

  As an electrode provided on the back substrate, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, conductive Conductive metal oxides such as zinc oxide, conductive polymers such as polyaniline, polypyrrole and polythiophene, metals such as gold, silver, copper, aluminum, nickel and chromium, and alloys based on these metals Can be mentioned. The electrode provided on the back side substrate may be transparent or may not be transparent.

  As a method for forming an electrode, a method of forming the above-described material into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, a method of laminating a metal foil (for example, rolled copper foil), A method in which a conductive agent is mixed with a solvent or a synthetic resin binder and applied. The above-mentioned material that can be patterned and is electrically conductive can be preferably used. The thickness of the display surface side electrode is preferably 0.01 to 10 μm, more preferably 0.05 to 5 μm, as long as conductivity can be secured and light transmittance is not hindered. Moreover, the thickness of a back side electrode should just ensure electroconductivity, 0.01-10 micrometers is preferable and 0.05-5 micrometers is more preferable.

  A transparent conductive material suitable as a display surface side electrode is less flexible than a metal material. When the display surface side electrode is a line electrode, it is preferably used in combination with a fine metal wire in order to prevent disconnection in the transparent electrode material. The width of the fine metal wire is preferably 1 μm to 10 μm because it does not hinder display visibility. Since the back side electrode does not need to consider light transmittance, the metal material having low electrical resistance and excellent flexibility is preferably used. The thickness of the back electrode is designed to be 0.01 to 10 μm from the viewpoint of electrical resistance, productivity, and cost.

  First, as shown below, a black display medium and a white display medium were produced, and color information display panels of Examples 1 to 8 and Comparative Examples 1 and 2 were produced and compared using them.

(Black display medium: black particles)
100 parts by weight of a polymethylpentene polymer (TPX-R18; manufactured by Mitsui Chemicals), 5 parts by weight of carbon black (special black 4: manufactured by Degussa) as a colorant, and titanium dioxide (Taipaque CR-90: Ishihara Sangyo) 90 parts by weight) and 3 parts by weight of a nigrosine compound (Bontron N07: manufactured by Orient Chemical Co., Ltd.) as a positively charged charge control agent are melt-kneaded by a twin-screw kneader, and a jet mill (Lab Jet Mill IDS-LJ type) : Nippon Pneumatic Co., Ltd.), finely pulverized, classified using a classifier (MDS-2: Nihon Numatic Industrial), and using a melt spheronizer (MR-10: Nihon Numatic Kogyo) Thus, a positively charged black particle group having an average particle diameter of 9.2 μm was obtained.

(White display medium: white particles)
100 parts by weight of polymethylpentene polymer (TPX-R18; manufactured by Mitsui Chemicals), 100 parts by weight of titanium dioxide (Taipaque CR-90: manufactured by Ishihara Sangyo Co., Ltd.) as a colorant, and phenol-based condensation as a negatively charged charge control agent 5 parts by weight of the product (Bontron E89: manufactured by Orient Chemical Co., Ltd.) was melt-kneaded with a twin-screw kneader and finely pulverized with a jet mill (Lab Jet Mill IDS-LJ type: Nippon Pneumatic Co., Ltd.). Classification using MDS-2: Nihon Numatic Kogyo Co., Ltd., and melt spheronization using a melt spheronization device (MR-10: Nihon Numatic Kogyo Co., Ltd.), and negative charging with an average particle size of 9.5 μm A white particle group was obtained.

<Example 1>
A 2 μm thick black resist film containing carbon black is laminated on a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, and then exposed and developed using a photolithographic method to form a 30 μm wide rib. A black light shielding material (black matrix) arranged in a lattice shape so as to surround was formed. Next, a color filter film in which an RGB three-primary color filter is formed at a predetermined position between black light shielding materials with a smaller area size (80 μm × 280 μm) than a one-pixel pixel size (100 μm × 300 μm) at a predetermined position between black light-shielding materials. Prepared. A cell that contains a transparent acrylic resin and a silane coupling agent on the surface of the color filter of this color filter film, and a transparent pixel electrode is patterned on one surface to store the display medium A black transparent material, a color filter, and a pixel are aligned and bonded to the other surface of a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm on which a partition wall for forming a film is formed. A color information display panel was prepared using a color filter substrate.

<Example 2>
A transparent pixel electrode is patterned on one surface, and a partition wall for forming a cell for housing a display medium is formed. A colorless transparent polyethylene terephthalate film substrate having a thickness of 25 μm is used, and the same method as in Example 1 is used. Thus, a color information display panel was produced.

<Example 3>
The color filter and black light shielding material are 80 μm wide stripes and 30 μm wide stripes, respectively. For one display unit pixel size (300 μm × 300 μm), the striped black light shielding material is between the color filter and the gap between the color filters. Other than using a colorless and transparent polyethylene terephthalate film substrate having a thickness of 200 μm in which a transparent pixel electrode is patterned on one surface and a partition wall for forming a cell for accommodating a display medium is formed. A color information display panel was prepared in the same manner as in Example 1.

<Example 4>
Using a photolithographic method in which a 5 μm thick white resist film containing titanium oxide with a particle size of about 250 nm is laminated on a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, and then exposed and developed, the width is 30 μm. A white light-shielding material (white matrix) in which the ribs were arranged in a grid so as to surround the pixels was formed. Next, a color filter film in which an RGB three primary color color filter is formed at a predetermined position between white light-shielding materials with a smaller area size (90 μm × 290 μm) than a one-pixel pixel size (100 μm × 300 μm) by an inkjet method. Prepared. A cell that contains a transparent acrylic resin and a silane coupling agent on the surface of the color filter of this color filter film, and a transparent pixel electrode is patterned on one surface to store the display medium A white transparent material, a color filter, and a pixel are aligned and bonded to the other surface of a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm on which a partition wall for forming a film is formed. A color information display panel was prepared using a color filter substrate.

<Example 5>
A 2 μm thick black resist film mixed with carbon black is laminated on a colorless and transparent polyethylene terephthalate film substrate with a thickness of 100 μm, and then a 30 μm wide rib is formed using a photolithographic method in which exposure and development are performed. A black light shielding material (black matrix) arranged in a stripe shape so as to sandwich the display unit pixel was formed. Next, a striped color filter with a stripe width of 80 μm and RGB three primary colors is formed at a thickness of 2 μm at a predetermined position between the striped black light shielding materials so as to have an area smaller than one pixel size (100 μm × 300 μm) by the flexo method. A color filter film was prepared. As the flexographic ink, an RGB resin in which RGB color pigments are dispersed in an acrylic resin containing a photocuring agent was used. A cell that contains a transparent acrylic resin and a silane coupling agent on the surface of the color filter of this color filter film, and a transparent pixel electrode is patterned on one surface to store the display medium A black transparent material, a color filter, and a pixel are aligned and bonded to the other surface of a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm on which a partition wall for forming a film is formed. A color information display panel was prepared using a color filter substrate.

<Example 6>
A 2 μm thick black resist film mixed with carbon black is laminated on a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, and then exposed to and developed with a photolithographic method, a rib having a width of 30 μm is 2 A black shading material (black matrix) arranged in a grid so as to surround 4 pixels arranged in × 2 was formed. Next, a 2 × 2 array of RGB primary color filters is arranged at predetermined positions between the black light-shielding materials in a stripe shape (80 μm × 80 μm) so as to have an area smaller than the pixel size (100 μm × 100 μm) by the inkjet method. A color filter film formed in the above was prepared. On the color filter surface of the color filter film where nothing is placed in the part that becomes a colorless and transparent color filter, an adhesive containing a transparent acrylic resin and a silane coupling agent is placed. A transparent pixel electrode is patterned on the surface of the surface, and a partition for forming a cell for accommodating a display medium is formed. On the other surface of the colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, a black light shielding material, A color information display panel was produced using a color filter substrate produced by bonding the color filter and the pixel while aligning them.

<Example 7>
Using a photolithographic method in which a 5 μm thick white resist film containing titanium oxide with a particle size of about 250 nm is laminated on a colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, and then exposed and developed, the width is 30 μm. A white light-shielding material (white matrix) in which the ribs were arranged in a grid so as to surround 4 pixels arranged in 2 × 2 was formed. Next, an RGB three primary color color filter having a size of 3 μm and a small area size (90 μm × 90 μm) smaller than a pixel size (100 μm × 100 μm) and a thickness of 3 μm is arranged in a 2 × 2 array by a inkjet method. A formed color filter film was prepared. On the color filter surface of the color filter film where nothing is placed in the part that becomes a colorless and transparent color filter, an adhesive containing a transparent acrylic resin and a silane coupling agent is placed. A transparent pixel electrode is patterned on the surface of the substrate, and a partition for forming a cell for accommodating a display medium is formed. On the other surface of the colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm, a white light shielding material, A color information display panel was produced using a color filter substrate produced by bonding the color filter and the pixel while aligning them.

<Example 8>
A 2 μm thick black resist film mixed with carbon black is laminated on a colorless and transparent polyethylene terephthalate film substrate with a thickness of 100 μm, and then a 30 μm wide rib is formed using a photolithographic method in which exposure and development are performed. A black light shielding material (black matrix) arranged in a stripe shape so as to sandwich pixel pixels was formed. Next, an RGB tri-primary color filter with a stripe width of 80 μm and a thickness of 2 μm is formed at a predetermined position between the black light-shielding materials so that the area size is smaller than one pixel pixel size (100 μm × 300 μm) by the flexo method. A prepared color filter film was prepared. As the flexographic ink, an RGB resin in which RGB color pigments are dispersed in an acrylic resin containing a photocuring agent was used. On the surface of the color filter of this color filter film, a thick adhesive which is a display surface side substrate of an information display panel that can perform black and white display by placing an adhesive containing a transparent acrylic resin and a silane coupling agent. A color information display panel was prepared by adhering the black light-shielding material, the color filter, and the pixels to the surface of the colorless and transparent polyethylene terephthalate film substrate having a thickness of 100 μm while aligning the pixels.

<Comparative Example 1>
Using a photolithographic method in which a black resist film with a thickness of 2 μm containing carbon black is laminated on one side of a colorless and transparent glass substrate with a thickness of 700 μm, and then exposing and developing, a rib with a width of 30 μm is formed into a pixel. After forming a black shading material (black matrix) arranged in a grid pattern so as to surround each color filter after forming each color filter in the area surrounded by the grid-like black shading material ribs, flatten the surface of the color filter and the black shading material Then, a transparent pixel electrode is patterned thereon, and a partition wall for forming a cell for accommodating a display medium is formed to obtain a color filter substrate. The color filter was formed by sequentially arranging RGB color primary color filter inks at predetermined positions at the same size (100 μm × 300 μm) as the one-pixel pixel size (100 μm × 300 μm) by an inkjet method. A color information display panel was produced using this color filter substrate.

<Comparative example 2>
A photolithographic method in which a white resist film having a thickness of 5 μm mixed with titanium oxide having a particle diameter of about 250 nm is laminated on a surface of a colorless transparent glass substrate with a thickness of 700 μm patterned on a transparent pixel electrode, and then exposed and developed. After forming a white light shielding material (white matrix) in which ribs with a width of 30 μm are arranged in a grid so as to surround the pixels, a partition wall for forming a cell for storing a display medium is formed thereon. An information display panel capable of displaying a black and white image was produced as a transparent glass substrate on the observation side. Next, an RGB three-primary color filter of the same size (100 μm × 300 μm) as the size of one pixel pixel (100 μm × 300 μm) by an inkjet method and having a thickness of 2 μm at a predetermined position outside the observation side substrate of the information display panel. Was formed in alignment with the pixels. After polishing and flattening the surface of this color filter, an adhesive containing a transparent acrylic resin and a silane coupling agent is placed, and a polyethylene terephthalate transparent film with a thickness of 100 μm is laminated for protection. A color information display panel was produced.

  With respect to the color information display panels of Examples 1 to 8 and Comparative Examples 1 and 2, the alignment of the color filter and the pixels is easily evaluated, and the state of the image when the test pattern is displayed is visually evaluated. did. Evaluation was performed from the front and from two directions from 45 degrees. The results are shown in Table 1 below.

  From the results of Table 1, the production of the color information display panel according to Comparative Example 1 takes man-hours to flatten the color filter, and the color information display panels according to Examples 1 to 8 and Comparative Example 2 It was found that the alignment of the color filter film can easily obtain a good state. The display state of the test pattern image is good in the color information display panels according to Examples 1 to 8 and Comparative Example 1, whereas the color information display panel according to Comparative Example 2 has a color filter, a pixel, It can be seen that the alignment is difficult and time is required, and the display state of the test pattern image is not good.

  The color information display panel to be manufactured according to the present invention includes a notebook computer, an electronic notebook, a portable information device called PDA (Personal Digital Assistants), a display unit of a mobile device such as a mobile phone, a handy terminal, an electronic book, an electronic book Electronic paper such as newspapers and electronic manuals (electronic instruction manuals), signboards, posters, bulletin boards such as blackboards and whiteboards, electronic desk calculators, home appliances, display parts for automobiles, card displays such as point cards and IC cards Department, electronic advertisement, information board, electronic POP (Point Of Presence, Point Of Purchase advertising), electronic price tag, electronic shelf label, electronic score, display part of RF-ID equipment, POS terminal, car navigation device, clock, etc. In addition to being suitably used as a color information display panel constituting the display unit of various electronic devices, an external display rewriting device It is also suitably used for a color information display panel (so-called rewritable paper) that performs display rewriting by connecting to a device.

(A), (b) is a figure which shows an example of the information display panel which can display the monochrome image used as the manufacture object of this invention, respectively. (A), (b) is a figure which shows the other example of the information display panel which can display the monochrome image which becomes the manufacture object of this invention, respectively. (A)-(c) is a figure for demonstrating an example of the manufacturing method of the panel for a color information display which concerns on 1st invention of this invention, respectively. (A)-(c) is a figure for demonstrating an example of the manufacturing method of the panel for a color information display which concerns on 2nd invention of this invention, respectively. (A)-(c) is a figure for demonstrating the other example of the manufacturing method of the panel for color information displays which concerns on 1st invention of this invention, respectively. (A)-(c) is a figure for demonstrating the other example of the manufacturing method of the panel for a color information display which concerns on 2nd invention of this invention, respectively. (A), (b) is a figure for contrasting and explaining an example of the color information display panel of a prior art example, and an example of the color information display panel of the example of this invention, respectively. (A)-(c) is a figure for demonstrating an example of the panel structure of the color information display panel produced with the manufacturing method of the color information display panel of this invention, respectively. (A)-(c) is a figure for demonstrating the other example of the panel structure of the color information display panel produced with the manufacturing method of the color information display panel of this invention, respectively. (A), (b) is a figure for demonstrating the further another example of the panel structure of the color information display panel produced with the manufacturing method of the color information display panel of this invention, respectively. (A), (b) is a figure for demonstrating the further another example of the panel structure of the color information display panel produced with the manufacturing method of the color information display panel of this invention, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Substrate 3W White display medium 3Wa Negatively charged white particle 3B Black display medium 3Ba Positively charged black particle 4 Partition 4-1 Part for ensuring gap between substrates 4-2 Part for cell formation 5, 6 Electrode 11 Transparent film base Material 12R Red color filter 12G Green color filter 12BL Blue color filter 13 Color filter film 14 Ribbed black shading material 15 Transparent adhesive 16 Ribbed white shading material 17 Bulkhead 21 Adhesive

Claims (8)

  An information display panel in which a white display medium and a black display medium are arranged in a space formed between two opposing substrates with at least one transparent electrode, and the display medium is moved to display an information image in black and white A method for manufacturing a color information display panel having a configuration in which at least three primary color filters are arranged on a transparent substrate side, and after forming a rib-shaped light shielding material on a transparent film substrate, the three primary colors are formed on the surface on which the light shielding material is formed. Place the color filter film with the color filter on the surface of the transparent substrate of the information display panel on which the transparent electrode is not formed by placing a colorless and transparent adhesive on the color filter surface. In addition, the use of a color filter substrate having a laminated structure in which the light shielding material and the three primary color filters are the same layer and are arranged outside the transparent substrate is used. Color information method of manufacturing a display panel to.   An information display panel in which a white display medium and a black display medium are arranged in a space formed between two opposing substrates with at least one transparent electrode, and the display medium is moved to display an information image in black and white A method for manufacturing a color information display panel having a configuration in which at least three primary color filters are arranged on a transparent substrate side, wherein a transparent image is formed on the outer surface of the display surface side transparent substrate of the information display panel for displaying information images in black and white. After forming a rib-shaped light-shielding material on a simple film substrate, a color filter film in which three primary color filters are formed on the surface on which the light-shielding material is formed, and a colorless transparent adhesive is placed on the color filter surface and bonded together. Manufacture of a color information display panel, characterized in that the light shielding material and the three primary color filters have the same layer and are arranged on the outside of the transparent substrate. Law.   2. The light shielding material according to claim 1, wherein the light shielding material is a black light shielding material, a white light shielding material, or a light shielding material obtained by combining a black light shielding material and a white light shielding material. Or a method for producing a color information display panel as described in 2 above.   4. The light-shielding material is formed by a photolithographic method in which a resist film having a predetermined color and a predetermined thickness is laminated, exposed and developed to form a predetermined rib shape. A method for producing a color information display panel as described in 1. above.   Any of the three primary colors of the three primary color filters is red (R), green (G), blue (B), or cyan (C), magenta (M), yellow (Y). The method for manufacturing a color information display panel according to claim 1, wherein the color information display panel is a color information display panel.   6. The method for producing a color information display panel according to claim 1, wherein a colorless transparent color (T) is provided as a color filter color in addition to the three primary colors.   A color information display panel manufactured by the method for manufacturing a color information display panel according to any one of claims 1 to 6, wherein the display surface side transparent substrate has a thickness t1 of 25 µm to 200 µm, and A space t0 is provided between the three primary color filters and the pixel outer periphery in the layer where the three primary color filters and the light shielding material are arranged, and the space t0 is perpendicular to the thickness t1 of the display surface side substrate and the position where the space is provided. A color filter having a smaller area than the pixel, which satisfies 0.3 × L ≧ t0 ≧ 0.02 × t1 in relation to the length L of the square dot pixel side corresponding to the correct position, is provided. Color information display panel.   The white display medium is a white display medium configured as a particle group including white particles having charging properties, and the black display medium is a particle group including black particles having charging properties different from those of the white particles. 8. The color information display panel according to claim 7, wherein the color information display panel is a black display medium configured.

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