JP2008145683A - Manufacturing method for panel substrate with color filter, panel substrate with color filter and panel for information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a panel substrate with a color filter in which a color filter layer and a transparent resin layer to be a protective layer are formed on the surface of a panel substrate and are made smooth, to provide the panel substrate with the color filter manufactured by the manufacturing method and to provide a panel for information display manufactured by using the panel substrate with the color filter. <P>SOLUTION: In the manufacturing method for the panel substrate with the color filter used for the panel for information display performing display by driving a display medium, when a layered structure having the transparent resin layer 12, the color filter layer 11, a transparent substrate 2 and an electrode or a conductive member composed of a transparent conductive metal oxide or a transparent conductive polymer in this order from an outer side of the panel to be a viewer side is formed, a smoothing step for smoothing the surface of the color filter layer by polishing and the like is performed after a color filter layer forming step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention uses a method for manufacturing a panel substrate with a color filter used for an information display panel that displays by driving a display medium, a panel substrate with a color filter produced by the manufacturing method, and a panel substrate with a color filter. It is related with the information display panel comprised by this.

  In a color information display device such as a liquid crystal display device, there is a technique for performing color display by arranging a color filter with a black matrix on a device panel.

  As a conventional technique for arranging a color filter on a device panel of a color information display device such as a liquid crystal display device, a black matrix is first formed, and then a color material (color filter material) is formed by an ink jet method in an opening portion of the black matrix. ) To form a color filter substrate with a black matrix (see, for example, Patent Document 1).

JP 2003-227920 A

In an information display panel that displays information such as images in color by driving an electric field on a display medium (charged colored particles for display) sealed in an inter-substrate space, a conductive metal oxide or a conductive high electrode is formed on the substrate surface in contact with the display medium. Although it is preferable to have a configuration in which electrodes made of molecules or conductive members are arranged, a panel substrate with a color filter for an information display panel having such a configuration has not been provided so far.
In a display panel substrate with a color filter used in a conventional liquid crystal display device or the like, a color filter is provided on an electrode (metal or ITO), and an electrode (metal or ITO) and a display medium (in this case, liquid crystal) Because the display panel configuration is not in contact with each other, such a conventional display panel substrate with a color filter is electrically driven in a display medium (charged colored particles for display) sealed in the space between the substrates to color information such as images. It could not be used for an information display panel to be displayed.
In the information display panel, the reason why a configuration in which a conductive metal oxide or conductive polymer electrode (or conductive member) is arranged on the substrate surface in contact with the display medium is not known, but the above configuration is used. In this case, the degree of conductivity of the conductive metal oxide or conductive polymer electrode (or conductive member) and the properties (shape, roughness, etc.) of the inner surface of the substrate are different from those of the display medium (charged colored particles for display). It can be inferred that this is a suitable state in terms of adhesion and mobility.
If an electrode is provided on the color filter layer and the display panel substrate is configured so that the electrode and the display medium are in contact with each other, the color filter may be deformed when the electrode is formed, or the electrode may be formed during patterning. As a result, the display panel substrate with a color filter provided on the side where the electrodes are in contact with the display medium could not be obtained.
When a color filter layer is formed on the surface of the panel substrate opposite to the surface on which the electrodes are provided, it is necessary to form a protective layer on the color filter layer, but since the color filter layer is not smooth, the protective layer The smoothness of was not obtained.

The present invention eliminates the unevenness of the color filter layer when forming the transparent resin layer as the color filter layer and the protective layer on the panel substrate surface opposite to the surface on which the electrodes are provided. It is a first object of the present invention to provide a method for producing a panel substrate with a color filter in which a transparent resin layer is smoothed.
A second object of the present invention is to provide a panel substrate with a color filter in which a color filter layer and a transparent resin layer are smoothed by the above production method.
A third object of the present invention is to provide an information display panel constituted by using a panel substrate with a color filter obtained by smoothing the color filter layer and the transparent resin layer.

  In order to achieve the first object, a method for manufacturing a panel substrate with a color filter according to claim 1 of the present invention is a method for manufacturing a panel substrate with a color filter for use in an information display panel that performs display by driving a display medium. A laminated structure in which an electrode or a conductive member composed of a transparent resin layer, a color filter layer, a transparent substrate, a transparent conductive metal oxide or a transparent conductive polymer is arranged as an order from the outside of the panel on the observation side In forming the transparent resin layer, the transparent resin layer is formed after performing the smoothing step of smoothing the surface of the color filter layer by polishing after the color filter layer forming step.

  In order to achieve the first object, a method for manufacturing a panel substrate with a color filter according to claim 2 of the present invention is a method for manufacturing a panel substrate with a color filter for use in an information display panel that performs display by driving a display medium. A laminated structure in which an electrode or a conductive member composed of a transparent resin layer, a color filter layer, a transparent substrate, a transparent conductive metal oxide or a transparent conductive polymer is arranged as an order from the outside of the panel on the observation side After forming the color filter layer, the transparent resin layer 1 is formed on the surface of the color filter layer to smooth the surface of the transparent resin layer 1, and then the transparent resin layer 2 is further formed and smoothed. And performing a fluorinated resin layer forming step.

  In order to achieve the first object, a method for manufacturing a panel substrate with a color filter according to claim 3 of the present invention is a method for manufacturing a panel substrate with a color filter for use in an information display panel that performs display by driving a display medium. When forming a laminated structure that becomes a transparent resin layer, a color filter layer, a transparent metal oxide layer, a transparent substrate, an electrode, or a conductive member as an order from the outside of the panel on the observation side, the color filter layer A transparent resin layer is formed after performing a smoothing step of smoothing the surface of the color filter layer by polishing after the forming step.

  In order to achieve the first object, a method for manufacturing a panel substrate with a color filter according to claim 4 of the present invention is a method for manufacturing a panel substrate with a color filter for use in an information display panel that performs display by driving a display medium. When forming a laminated structure that becomes a transparent resin layer, a color filter layer, a transparent metal oxide layer, a transparent substrate, an electrode, or a conductive member as an order from the outside of the panel on the observation side, the color filter layer After the forming step, the transparent resin layer 1 is formed on the surface of the color filter layer to smooth the surface of the transparent resin layer 1, and then the transparent resin layer 2 is further formed to perform the smoothing resin layer forming step. Features.

  As a suitable example of the manufacturing method of the panel substrate with a color filter of the present invention, a smoothing process by polishing is used to form the transparent resin layer 1 and smooth the surface of the transparent resin layer, and further on the surface. The transparent resin layer 2 to be formed is made of the same material as the transparent resin layer 1, the transparent substrate is a transparent resin substrate, and the color filter layer is a black matrix color filter layer. is there.

  In order to achieve the second object, the panel substrate with a color filter of the present invention is produced by the method for producing a panel substrate with a color filter according to any one of claims 1 to 7. .

  In order to achieve the third object, an information display panel of the present invention is an information display panel composed of a panel substrate with a color filter according to claim 8 and another panel substrate, A cell corresponding to the number and arrangement position of the color filters is formed in the space between the two panel substrates, at least one type of display medium is enclosed in the cell, an electric field is applied to the display medium, and the display medium is formed. It is characterized by displaying information such as an image by moving it.

  As a preferred example of the information display panel of the present invention, the display medium is composed of at least one kind of particles and has optical reflectivity and chargeability.

  According to the method for manufacturing a panel substrate with a color filter according to the first aspect of the present invention, when a panel substrate with a color filter used for an information display panel that performs display by driving a display medium is produced, In order from the outside of the panel, a transparent resin layer, a color filter layer, a transparent substrate, an electrode or a conductive member made of a transparent conductive metal oxide or a transparent conductive polymer is formed. Since the transparent resin layer is formed after the smoothing step of smoothing the surface of the color filter layer by polishing after the filter layer forming step, the color filter layer and the panel substrate with a color filter in which the transparent resin layer is smoothed are formed. A manufacturing method can be provided.

  According to the method for manufacturing a panel substrate with a color filter according to the second aspect of the present invention, when producing a panel substrate with a color filter used for an information display panel for driving and displaying a display medium, In order from the outside of the panel, a transparent resin layer, a color filter layer, a transparent substrate, an electrode or a conductive member made of a transparent conductive metal oxide or a transparent conductive polymer is formed. After the filter layer forming step, the transparent resin layer 1 is formed on the surface of the color filter layer to smooth the surface of the transparent resin layer 1, and then the transparent resin layer 2 is further formed to perform the smoothed resin layer forming step. From the above, it is possible to provide a method for producing a panel substrate with a color filter in which the color filter layer and the transparent resin layer are smoothed.

  According to the method for manufacturing a panel substrate with a color filter according to claim 3 of the present invention, when producing a panel substrate with a color filter used for an information display panel that displays by driving a display medium, the observation side When forming a laminated structure to be a transparent resin layer, a color filter layer, a transparent metal oxide layer, a transparent substrate, an electrode or a conductive member, the color filter layer is formed after the color filter layer forming step. Since the transparent resin layer is formed after the smoothing step of smoothing the surface of the layer by polishing, the color filter layer and the method for producing a panel substrate with a color filter in which the transparent resin layer is smoothed can be provided.

According to the method for manufacturing a panel substrate with a color filter according to the fourth aspect of the present invention, when a panel substrate with a color filter used for an information display panel that performs display by driving the display medium is produced, Is a manufacturing method of a panel substrate with a color filter used for an information display panel that displays by driving the transparent resin layer, the color filter layer, the transparent metal oxide layer, as an order from the outside of the panel on the observation side, When forming a laminated structure to be a transparent substrate, electrode or conductive member, after forming the transparent resin layer 1 on the surface of the color filter layer and smoothing the surface of the transparent resin layer 1 after the color filter layer forming step Further, since the transparent resin layer 2 is further formed to perform the smoothing resin layer forming step, the color filter obtained by smoothing the color filter layer and the transparent resin layer Method for manufacturing a can panel substrate can be provided.
At that time, in order to form the transparent resin layer 1 and smooth the surface of the transparent resin layer, a smoothing process by polishing is used, and the transparent resin layer 2 formed thereon is further separated from the transparent resin layer 1. It is preferable that they are made of the same material.

  According to the panel substrate with a color filter of the present invention, the color filter layer and the transparent resin layer are produced by the method for producing a panel substrate with a color filter according to any one of claims 1 to 7. It is possible to provide a panel substrate with a color filter that is smoothed.

  According to the information display panel of the present invention, an information display panel comprising the panel substrate with a color filter according to claim 7 and another panel substrate, the space between the two panel substrates A cell is formed in accordance with the number and arrangement position of the color filters, and at least one type of display medium is sealed in the cell, and an electric field is applied to the display medium, and the display medium is moved to move information such as an image. Since display is performed, an information display panel configured using a panel substrate with a color filter obtained by smoothing the color filter layer and the transparent resin layer can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, the configuration of an information display panel to which the panel substrate with a color filter obtained by the manufacturing method of the present invention is applied will be described. In the information display panel to which the panel substrate with a color filter obtained by the manufacturing method of the present invention is applied, an electric field is applied to the 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.

  FIG. 1A, FIG. 3B, FIG. 3A, FIG. 4A, FIG. 4A to FIG. 4D, and FIG. , (B) to FIG. 6 (a), (b) will be described.

  In the example shown in FIGS. 1A and 1B, a plurality of cells partitioned by a partition wall 4 are formed between a substrate 1 and a substrate 2 (panel substrate constituting a panel substrate with a color filter), and three cells are formed. 21-1, 21-2, and 21-3 constitute a display unit, and the cells 21-1 to 21-3 as display media include a white display medium 3W composed of a group of display white particles 3Wa and a display black. A black display medium 3B composed of a particle group of particles 3Ba is enclosed, a red color filter 22R is provided on the observer side substrate 2 in the first cell 21-1, and an observer side substrate in the second cell 21-2. 2 is provided with a green color filter 22G, and a blue color filter 22B is provided on the viewer side substrate 2 in the third cell 21-3 to perform color display. In this example, as shown in FIG. 1A, by moving the white display medium 3W in all of the first cell 21-1 to the third cell 21-3 to the viewer side, As shown in FIG. 1B, white display is performed, and the black display medium 3B is moved in all of the first cell 21-1 to the third cell 21-3 to the observer side, thereby allowing the observer to In contrast, black display is performed. Multi-color display is possible by moving the display medium. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted. The electrode is provided with a line electrode.

  In the example shown in FIGS. 2A and 2B, a plurality of cells partitioned by partition walls 4 are formed between the substrate 1 and the substrate 2 (panel substrate constituting the panel substrate with a color filter), and three cells are formed. 21-1, 21-2, and 21-3 constitute a display unit, and the cells 21-1 to 21-3 as display media include a white display medium 3W composed of a group of display white particles 3Wa and a display black. A black display medium 3B composed of a particle group of particles 3Ba is enclosed, a red color filter 22R is provided on the observer side substrate 2 in the first cell 21-1, and an observer side substrate in the second cell 21-2. 2 is provided with a green color filter 22G, and a blue color filter 22B is provided on the viewer side substrate 2 in the third cell 21-3 to perform color display. In this example, as shown in FIG. 2 (a), the white display medium 3W is moved in all of the first cell 21-1 to the third cell 21-3 toward the viewer side, thereby As shown in FIG. 2B, the white display is performed, and the black display medium 3B is moved to the observer side in all of the first cell 21-1 to the third cell 21-3. In contrast, black display is performed. Multi-color display is possible by moving the display medium. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted. The electrodes are provided with individual electrodes.

  In the example shown in FIGS. 3A and 3B, a plurality of cells partitioned by a partition wall 4 are formed between the substrate 1 and the substrate 2 (panel substrate constituting a panel substrate with a color filter), and three cells are formed. 21-1, 21-2, and 21-3 constitute a display unit, and the cells 21-1 to 21-3 as display media include a white display medium 3W composed of a group of display white particles 3Wa and a display black. A black display medium 3B composed of a particle group of particles 3Ba is enclosed, the individual electrode 6 is provided on the red color filter 22R provided on the observer-side substrate 2 in the first cell 21-1, and the second cell 21 is provided. -2 is provided with an individual electrode 6 on the green color filter 22G provided on the observer-side substrate 2 and individually on the blue color filter 22B provided on the observer-side substrate 2 in the third cell 21-3. Provide electrode 6 for color display To have. In this example, as shown in FIG. 3A, by moving the white display medium 3W in all of the first cell 21-1 to the third cell 21-3 to the viewer side, As shown in FIG. 3B, the white display is performed, and the black display medium 3B is moved in all of the first cell 21-1 to the third cell 21-3 to the observer side, so that the observer can In contrast, black display is performed. Multi-color display is possible by moving the display medium. In addition, in FIG. 3 (a), (b), the partition in front is abbreviate | omitted. Here, a black matrix 14 is provided between the partition wall 4 and the substrate 2.

  In the example shown in FIGS. 4A to 4D, a plurality of cells partitioned by a partition wall 4 are formed between the substrate 1 and the substrate 2 (panel substrate constituting a panel substrate with a color filter), and three cells are formed. 21-1, 21-2, and 21-3 constitute a display unit, and the cells 21-1 to 21-3 as display media include a white display medium 3W composed of a group of display white particles 3Wa and a display black. A black display medium 3B composed of a particle group of particles 3Ba is enclosed, a red color filter 22R is provided on the observer-side substrate 2 in the first cell 21-1, and the observer side in the second cell 21-2. A green color filter 22G is provided on the substrate 2 and a blue color filter 22B is provided on the viewer side substrate 2 in the third cell 21-3 to perform color display. In this example, first, as shown in FIGS. 4A and 4C, in each cell formed by the partition walls 4, the external electric field forming means 23 provided outside the substrate 1 (corresponding to the cell position). And an external electric field forming means 24 (arranged so as to correspond to the cell position) provided on the outside of the substrate 2 to generate an electric field corresponding to the cell position. Accordingly, the white display medium 3W and the black display medium 3B are moved perpendicularly to the substrates 1 and 2. Then, as shown in FIG. 4B, the white display medium 3W of all the cells is visually recognized by the observer, and white display is performed. As shown in FIG. 4D, the black display medium 3B of all the cells is displayed. It is shown that a black display is performed by making the viewer visually recognize. Multi-color display is possible by moving the display medium. In addition, in FIG. 4 (a)-(d), the partition in front is abbreviate | omitted. Although the conductive members 25 and 26 shown here are shown as conductive films, they may be arranged only in the cells.

  The above description is similarly applied to the case where the white display medium 3W including the particle group is replaced with the white display medium including the powder fluid and the black display medium 3B including the particle group is replaced with the black display medium including the powder fluid. be able to. The powder fluid will be described later.

  In the example shown in FIGS. 5A and 5B, a plurality of cells partitioned by partition walls 4 are formed between the substrate 1 and the substrate 2 (panel substrate constituting the panel substrate with a color filter), and the cell is used as a display medium. In addition, a microcapsule 9 in which a rotating ball 8 having two polarities in which white and black are separately applied and sealed with an insulating liquid is disposed inside, and a red color filter 22R on the viewer side substrate 2 is disposed. A green color filter 22G and a blue color filter 22B are provided to perform color display. In this example, the rotating ball 8 in the microcapsule 9 is rotationally driven according to the electric field generated by applying a voltage between the electrode 5 provided on the substrate 1 and the electrode 6 provided on the substrate 2, As shown in FIG. 5 (a), the white portions of all the rotating balls 8 are visually recognized by the observer to display white, and as shown in FIG. 5 (b), the black portions of all the rotating balls 8 are displayed by the observer. It is shown that a black display is performed. Multi-color display is possible by moving the display medium. In addition, in FIG. 5 (a), (b), the partition in front is abbreviate | omitted. Here, an individual electrode is provided as an electrode, and a black matrix 14 is provided between the partition wall 4 and the substrate 2.

In the example shown in FIGS. 6A and 6B, a plurality of cells partitioned by partition walls 4 are formed between the substrate 1 and the substrate 2 (panel substrate constituting a panel substrate with a color filter), and the cell is used as a display medium. In addition, a microcapsule 9 in which a white display medium 3W and a black display medium 3B are sealed together with an insulating liquid is disposed, and a red color filter 22R, a green color filter 22G, and a blue color filter 22B are disposed on the viewer side substrate 2. Is provided for color display. In this example, the display medium in the microcapsule 9 is moved in accordance with the electric field generated by applying a voltage between the electrode 5 provided on the substrate 1 and the electrode 6 provided on the substrate 2, and FIG. As shown in (a), the white display medium 3W in all the microcapsules is visually recognized by the observer to display white, and as shown in FIG. 6 (b), the black display medium 3B in all the microcapsules is displayed. It is shown that a black display is performed by making the viewer visually recognize. Multi-color display is possible by moving the display medium. In addition, in FIG. 7 (a), (b), the partition in front is abbreviate | omitted. Here, a line electrode is provided as an electrode, and a black matrix 14 is provided between the partition wall 4 and the substrate 2.
1 (a), (b) to FIG. 3 (a), (b), FIG. 4 (a) to (d), FIG. 5 (a), (b) to FIG. 6 (a), ( In b), the example in which the electrode and the conductive member are provided on the color filter has been described. However, as described above, it is very troublesome to form the electrode and the conductive member on the color filter.

  Hereinafter, a method for producing a panel substrate with a color filter of the present invention, a panel substrate with a color filter produced by the production method, and an information display panel produced using the panel substrate with a color filter are described in detail based on the drawings Explained.

7A to 7D are views for explaining an example of the method for producing the panel substrate with a color filter of the present invention. First, as shown in FIG. 7A, a transparent substrate with an ITO line electrode in which an ITO line electrode 6 is formed on one surface (lower surface in the illustrated example) of the substrate 2 that is a display surface side substrate is prepared. As the substrate 2, a substrate with a transparent electrode such as ITO can be used, a transparent glass substrate or a transparent resin substrate (transparent film substrate) can be used alone, or a transparent moisture-permeable barrier layer such as SiO ₂ can be used. A substrate with a (metal oxide layer) or a substrate with a transparent metal oxide layer such as ITO can be used. Next, as shown in FIG. 7B, three colors (light of light) are formed on the surface (upper surface in the drawing) opposite to the surface on which the ITO line electrode 6 is formed of the substrate 2 by an ink jet method, a photolithographic method, or a printing method. A color filter layer forming step for forming the color filter layer 11 composed of the color filters 11R, 11G, and 11B of the three primary colors (R, G, and B) is performed. At this time, irregularities as shown in the figure are formed on the surface of the color filter layer 11. Next, since the surface on which the color filter layer is formed becomes the observation side (outside of the panel) surface, the surface of the color filter layer 11 is polished (a polishing method such as CMP is used as shown in FIG. 7C). ) To perform a smoothing step. Then, as shown in FIG.7 (d), the transparent resin layer formation process which forms the transparent resin layer 12 used as a protective layer on the smoothed color filter layer 11 is performed. Thus, even when a very thin protective layer is provided, the unevenness of the base does not appear. Therefore, “line electrode 6, color filter layer 11, and transparent resin layer on both surfaces of substrate 2, respectively, shown in FIG. 12 is formed, and the color filter layer 11 and the transparent resin layer 12 are smoothed, so that a panel substrate with a color filter having a smooth outermost surface on the observation side of the panel is obtained.

FIGS. 8A to 8D are views for explaining another example of the method for producing the panel substrate with a color filter of the present invention. First, as shown in FIG. 8A, a transparent substrate with an ITO line electrode in which an ITO line electrode 6 is formed on one surface (lower surface in the illustrated example) of the substrate 2 that is a display surface side substrate is prepared. As the substrate 2, a substrate with a transparent electrode such as ITO can be used, a transparent glass substrate or a transparent resin substrate (transparent film substrate) can be used alone, or a transparent moisture-permeable barrier layer such as SiO ₂ can be used. A substrate with a (metal oxide layer) or a substrate with a transparent metal oxide layer such as ITO can be used. Next, as shown in FIG. 8B, three colors (light of light) are formed on the surface (upper surface in the drawing) opposite to the surface on which the ITO line electrode 6 is formed of the substrate 2 by an ink jet method, a photolithographic method, or a printing method. A color filter layer forming step for forming the color filter layer 11 composed of the color filters 11R, 11G, and 11B of the three primary colors (R, G, and B) is performed. At this time, irregularities as shown in the figure are formed on the surface of the color filter layer 11. Next, since the surface on which the color filter layer is formed becomes the observation side (outside of the panel) surface, the first transparent resin layer 16 (transparent) is formed on the surface of the color filter layer 11 as shown in FIG. A smoothing resin layer forming step of smoothing the surface of the transparent resin layer 16 by forming the resin layer 1) and filling the unevenness is performed. Here, it is preferable to use a transparent resin layer 1 having a low viscosity that is excellent in transparency and shape followability (easy to fill gaps such as irregularities). Thereafter, as shown in FIG. 8D, a transparent resin layer forming step of forming a transparent resin layer 12 (transparent resin layer 2) serving as a protective layer on the smoothed color filter layer 11 and transparent resin layer 16 I do. As the transparent resin layer 2, it is preferable to use a material excellent in transparency and scratch resistance.
As a result, even when a very thin protective layer is provided, the underlying unevenness does not appear. Therefore, “electrode 6, color filter layer 11, transparent resin layer 16 on both surfaces of substrate 2, respectively, shown in FIG. And a transparent resin layer 12 is formed, and a color filter layer 11, a transparent resin layer 16, and a panel substrate with a color filter obtained by smoothing the transparent resin layer 12 can be formed. A panel substrate with a filter is obtained.
After forming the first transparent resin layer 16 (transparent resin layer 1) on the surface of the color filter layer 11, polishing the surface of the transparent resin layer 16 is preferable because the surface of the transparent resin layer 16 can be made smoother. When the transparent resin layer 12 is provided on this, a transparent resin layer 2 made of a material different from that of the transparent resin layer 1 may be used. This is preferable because light scattering at the resin layer interface is reduced and an excellent display image quality is obtained.

FIGS. 9A to 9H are views for explaining a method of arranging a color filter layer on a panel substrate with a black matrix in the method for manufacturing a panel substrate with a color filter of the present invention.
First, as shown in FIGS. 9A and 9B, the line electrode 6 is formed on one surface (lower surface in the illustrated example) of the substrate 2 which is the display surface side substrate, and on the other surface (the upper surface illustrated). A line electrode on which a black matrix 14 is formed and a transparent substrate 2 with a black matrix are prepared. As shown in FIGS. 9C and 9D, one surface of the substrate 2 which is a display surface side substrate (illustrated example) Then, the individual electrode 6 is formed on the lower surface and the transparent substrate 2 with the black matrix and the black matrix 14 formed on the other surface (the upper surface in the drawing) is prepared. At this time, the black matrix 14 functions as a bank for preventing diffusion of the color filter material outside the arrangement region. As the substrate 2, a substrate with a transparent electrode such as ITO can be used, a transparent glass substrate or a transparent resin substrate (transparent film substrate) can be used alone, or a transparent moisture-permeable barrier layer such as SiO ₂ can be used. A substrate with a (metal oxide layer) or a substrate with a transparent metal oxide layer such as ITO can be used. Next, as shown in FIGS. 9 (e), 9 (f), 9 (g), and 9 (h), three colors (three primary colors of light) are formed in the openings of the black matrix 14 by an inkjet method, a photolitho method, or a printing method. A color filter material placement step of placing a color filter material to be a color filter layer 11 composed of the color filters 11R, 11G, and 11B of R, G, and B), and then a smoothing step was performed on the color filter layer 11; Then, the transparent resin layer formation process which forms the transparent resin layer 12 used as a protective layer is performed.

FIGS. 10A to 10H are views for explaining another example of the method for producing the panel substrate with a color filter of the present invention. First, as shown in FIG. 10A, a transparent substrate with an ITO line electrode in which an ITO line electrode 6 is formed on one surface (the lower surface in the illustrated example) of the substrate 2 which is a display surface side substrate is prepared. As the substrate 2, a substrate with a transparent electrode such as ITO can be used, a transparent glass substrate or a transparent resin substrate (transparent film substrate) can be used alone, or a transparent moisture-permeable barrier layer such as SiO ₂ can be used. A substrate with a (metal oxide layer) or a substrate with a transparent metal oxide layer such as ITO can be used. Next, as shown in FIG. 10B, a black matrix material layer 14 is formed on the other surface (the upper surface in the drawing) of the substrate 2. Next, as shown in FIG. 10C, dry etching is performed through a mask 13 in which three color (R, G, B) color filter layer arrangement portions 13a are opened, and a black matrix material layer on the substrate 2 is formed. The structure of FIG. 10D from which the 14 color filter layer arrangement portions 13a are removed is formed. The remaining black matrix 14 functions as a bank for preventing diffusion of the color filter material outside the arrangement region.
The dry etching method is not particularly limited, but plasma etching or RIE (reactive ion etching) can be used, and oxygen RIE is preferably used as RIE.
As an example, in oxygen RIE, a substrate on which a black matrix material layer is formed is set between electrodes of an etching apparatus in an oxygen atmosphere, and plasma is generated by applying a voltage to the electrodes, and the generated plasma is applied to the substrate. Etching can be performed by vertically contacting the color filter layer arrangement portion 13 a of the black matrix material layer 14. Since oxygen RIE etches only organic matter, if there is a non-organic matter layer such as an electrode under the black matrix material layer, a desired portion of the black matrix material layer can be removed by dry etching with a high degree of freedom, Even when the black matrix material layer is directly under the resin substrate, by controlling the conditions, there is an advantage that only a desired portion of the black matrix material layer can be removed without etching the resin substrate. Therefore, it is particularly effective when oxygen RIE is used as a dry etching method. Since oxygen RIE etches and removes only organic matter, it is provided under an inorganic substrate such as glass or a black matrix material layer. It is possible to remove only a desired portion of the black matrix material layer made of an organic material without etching and removing the provided metal oxide layer such as a SiO ₂ film or an ITO film. Even in the case of a resin film substrate, if there is a SiO ₂ film or an ITO film provided on the substrate, it serves as a protective layer for the resin substrate, so that there is no fear of damaging the resin substrate. Since oxygen RIE removes only organic substances by etching, an organic pigment or an organic dye is used as a colorant to be blended in the black matrix material to be etched.

  Next, as shown in FIG. 10 (e), three color (R, G, B) colors are formed on the color filter layer arrangement portion 13a on the substrate 2 from which the black matrix material layer 14 has been removed by etching using an inkjet method. A color filter layer 11 composed of the filter layers 11R, 11G, and 11B is disposed and formed. At this time, the etched portion (the color filter layer arrangement portion 13a which is a portion for forming the color filter layers 11R, 11G, and 11B) is provided with hydrophilicity by introducing hydroxyl groups or oxygen atoms into the entire surface. A color filter material composed of water-based ink is firmly formed. Thus, a “panel substrate with a color filter in which the color filter layer 11 with the black matrix 14 is formed on the other surface of the substrate 2 on which the electrode 6 is formed on one surface” has the structure shown in FIG. . Next, since the surface on which the color filter layer is formed becomes the observation side (outside of the panel) surface, the surface of the color filter layer 11 is polished (a polishing method such as CMP is used as shown in FIG. 10G). ), And then a transparent resin layer forming step for forming a transparent resin layer 12 serving as a protective layer on the smoothed color filter layer 11 as shown in FIG. I do. As a result, even when a very thin protective layer is provided, the underlying unevenness does not appear. Therefore, a “black matrix is formed on the other surface of the substrate 2 on which the electrode 6 is formed, as shown in FIG. The color filter layer 11 with 14 is formed, and the color filter layer 11 with the black matrix and the panel substrate with color filter obtained by smoothing the transparent resin layer 12 can be formed. An attached panel substrate is obtained.

FIGS. 11A to 11H are views for explaining another example of the method for manufacturing the panel substrate with a color filter of the present invention. First, as shown in FIG. 11A, an ITO line electrode 6 is formed on one surface (lower surface in the illustrated example) of the substrate 2 which is a display surface side substrate, and a transparent SiO ₂ layer is formed on the other surface of the substrate 2. An ITO line electrode and a transparent substrate with a transparent oxide layer on which a transparent oxide layer 15 having a moisture barrier property such as the same is formed are prepared. Next, as shown in FIG. 11B, a black matrix material layer 14 is formed on the transparent oxide layer 15 formed on the substrate 2. Next, as shown in FIG. 11C, dry etching is performed through a mask 13 in which three color (R, G, B) color filter layer arrangement portions 13a are opened, so that the transparent oxide layer 15 of the substrate 2 is formed. The structure of FIG. 11D is formed by removing the color filter layer arrangement portion 13a of the black matrix material layer 14 formed above. The remaining black matrix 14 functions as a bank for preventing diffusion of the color filter material outside the arrangement region.
Thereafter, the color filter layer forming step, the smoothing step, and the transparent resin layer forming step are performed by performing the steps shown in FIGS. 11 (e) to (h) in the same manner as FIGS. . As a result, even when a very thin protective layer is provided, the underlying unevenness does not appear. Therefore, “transparent oxidation of the other surface of the substrate 2 on which the electrode 6 is formed on one surface” shown in FIG. A color filter layer 11 with a black matrix is formed on the material layer 15, and a panel substrate with a color filter in which the color filter layer 11 with the black matrix and the transparent resin layer 12 are smoothed ”can be formed. A panel substrate with a color filter having a smooth surface is obtained. Here, since the SiO ₂ layer or the like becomes a barrier for dry etching, the substrate surface is not damaged.

12A to 12H are diagrams for explaining another example of the method for manufacturing the panel substrate with a color filter of the present invention. First, as shown in FIG. 12A, a transparent substrate with an ITO line electrode in which an ITO line electrode 6 is formed on one surface (lower surface in the illustrated example) of the substrate 2 which is a display surface side substrate is prepared. As the substrate 2, a substrate with a transparent electrode such as ITO can be used, a transparent glass substrate or a transparent resin substrate (transparent film substrate) can be used alone, or a transparent moisture-permeable barrier layer such as SiO ₂ can be used. A substrate with a (metal oxide layer) or a substrate with a transparent metal oxide layer such as ITO can be used. Next, as shown in FIG. 12B, three colors (light of light) are formed on the surface opposite to the surface on which the ITO line electrode 6 is formed (upper surface in the drawing) of the substrate 2 by an ink jet method, a photolithographic method, or a printing method. A color filter layer forming step for forming the color filter layer 11 composed of the color filters 11R, 11G, and 11B of the three primary colors (R, G, and B) is performed. At this time, irregularities as shown in the figure are formed on the surface of the color filter layer 11. Next, as shown in FIG. 12C, the boundary portion of the color filter layer 11 formed on the substrate 2 is dry-etched through the mask 13 having the boundary portions 13b of the color filters 11R, 11G, and 11B opened. The structure of FIG. 12D from which 13b has been removed is formed.
Thereafter, as shown in FIG. 12E, the black matrix 14 is formed by the inkjet method on the color filter layer boundary portion 13b removed by etching. At this time, the etched portion (the portion forming the black matrix 14) is hydrophilically imparted by introducing hydroxyl groups or oxygen atoms over the entire surface, so that a black matrix material composed of water-based ink is firmly formed. 12 (f), “a panel substrate with a color filter in which the line electrode 6 is formed on one surface of the substrate 2 and the color filter layer 11 and the black matrix 14 are formed on the other surface of the substrate 2”. Can be formed. After that, the surface on which the color filter layer is formed becomes the observation side (outside of the panel) surface, so the surface of the color filter layer 11 with the black matrix is polished (polishing method such as CMP) as shown in FIG. The transparent resin layer 12 serving as a protective layer is then formed on the smoothed color filter layer 11 with a black matrix as shown in FIG. 12 (h). A transparent resin layer forming step is performed. As a result, even when a very thin protective layer is provided, the unevenness of the base does not appear. Therefore, “black on the other surface of the substrate 2 on which the line electrode 6 is formed on one surface” shown in FIG. The color filter layer 11 with the matrix is formed, and the color filter layer 11 with the black matrix and the panel substrate with the color filter obtained by smoothing the transparent resin layer 12 can be formed. An attached panel substrate is obtained.

FIGS. 13A to 13H are views for explaining another example of the method for manufacturing the panel substrate with a color filter of the present invention. First, as shown in FIG. 13A, a transparent conductive member layer 17 is formed on one surface (lower surface in the illustrated example) of the substrate 2 that is the display surface side substrate, and on the other surface (upper surface in the illustrated example). A transparent conductive member layer on which a moisture permeable barrier layer (metal oxide layer) 15 such as a transparent SiO ₂ layer is formed and a transparent substrate with a transparent oxide layer are prepared. Next, as shown in FIG. 13B, three colors (three primary colors of light; R, G, B) are formed on the transparent oxide layer 15 formed on the substrate 2 by an inkjet method, a photolithography method, or a printing method. A color filter layer forming step for forming the color filter layer 11 including the filters 11R, 11G, and 11B is performed. At this time, irregularities as shown in the figure are formed on the surface of the color filter layer 11.
Thereafter, by performing the steps shown in FIGS. 13C to 13H in the same manner as FIGS. 12C to 12H, the transparent conductive member layer 17 is formed on one surface shown in FIG. A transparent oxide layer 15 and a color filter layer 11 with a black matrix are formed on the other surface of the formed substrate 2 to form a panel substrate with a color filter in which the color filter layer 11 with a black matrix and the transparent resin layer 12 are smoothed. Thus, a panel substrate with a color filter having a smooth outermost surface on the observation side of the panel can be obtained. Here, since the SiO ₂ layer or the like becomes a barrier for dry etching, the substrate surface is not damaged.

  Next, the information display panel constituted by the panel substrate with a color filter of the present invention and another panel substrate produced by the method for producing a panel substrate with a color filter described above is shown in FIGS. This will be described with reference to FIGS. 17A, 17B, 18 and 19. FIG. Note that some of the following panel substrates with color filters are obtained by partially changing constituent members and display media with respect to the above-described manufacturing methods.

14A and 14B are views for explaining an example of a method for manufacturing an information display panel using the panel substrate with a color filter of the present invention.
First, “the line electrode 6, the color filter layer 11, and the transparent resin layer 12 are formed on both surfaces of the substrate 2, respectively, and the color filter layer 11 and the transparent resin layer 12 are manufactured by the manufacturing method of FIGS. A panel substrate with a color filter smoothed is prepared. Next, as shown in FIG. 14A, this panel substrate is attached with a line electrode 5 which is another substrate in which the white display medium 3W and the black display medium 3B are arranged in the cell formed by the partition walls 4. By bonding to the “substrate 1”, an information display panel shown in FIG. 14B is obtained.

FIGS. 15A and 15B are views for explaining another example of a method for manufacturing an information display panel using the panel substrate with a color filter of the present invention.
First, a color filter layer with a black matrix formed on the transparent oxide layer 15 on the other side of the substrate 2 on which the individual electrode 6 is formed on one side, produced according to the manufacturing method of FIGS. 11 is prepared, and the color filter layer 11 with black matrix and the panel substrate with color filter in which the transparent resin layer 12 is smoothed are prepared. Next, as shown in FIG. 15A, this panel substrate is provided with “individual electrode 5 which is another substrate in which the white display medium 3W and the black display medium 3B are arranged in the cell formed by the partition walls 4”. By attaching to the “substrate 1”, an information display panel shown in FIG.

16A and 16B are views for explaining another example of a method for manufacturing an information display panel using the panel substrate with a color filter of the present invention.
First, the “color filter layer 11 with a black matrix is formed on the transparent oxide layer 15 on the other surface of the substrate 2 on which the line electrode 6 is formed on one surface” produced by the manufacturing method of FIGS. A panel substrate with a color filter formed and smoothed with the color filter layer 11 with a black matrix and the transparent resin layer 12 is prepared. Next, as shown in FIG. 16A, the panel substrate is attached with the line electrode 5 which is another substrate in which the white display medium 3W and the black display medium 3B are arranged in the cell formed by the partition walls 4. By bonding to the “substrate 1”, an information display panel shown in FIG.

FIGS. 17A and 17B are views for explaining another example of a method for manufacturing an information display panel using the panel substrate with a color filter of the present invention.
First, “a transparent oxide layer 15 and a black matrix-attached color filter layer 11 on the other surface of the substrate 2 on which the transparent conductive member layer 17 is formed on one surface” produced by the manufacturing method of FIGS. Is prepared and a color filter layer 11 with a black matrix and a transparent resin layer 12 are smoothed to prepare a panel substrate with a color filter. Next, as shown in FIG. 17A, this panel substrate is “a transparent conductive member layer that is another substrate in which the white display medium 3W and the black display medium 3B are arranged in the cell formed by the partition walls 4”. The information display panel shown in FIG. 17B is obtained by bonding to the “substrate 17 with 17”.

FIG. 18 is a view for explaining another example of the information display panel using the panel substrate with the color filter of the present invention.
First, “prepared according to the manufacturing method of FIGS. 7A to 7D”, “the individual electrode 6, the color filter layer 11 and the transparent resin layer 12 are formed on both surfaces of the substrate 2, respectively, and the color filter layer 11 and the transparent resin are formed. A panel substrate with a color filter in which the layer 12 is smoothed is prepared. Next, as shown in FIG. 18, this panel substrate is “an individual electrode that is another substrate in which the white display medium 3 </ b> W and the black display medium 3 </ b> B are arranged together with the insulating liquid 18 in the cell formed by the partition walls 4. The information display panel shown in FIG. 18 is obtained by bonding to the “5 substrate 1”.

FIG. 19 is a view for explaining another example of the information display panel using the panel substrate with a color filter of the present invention.
First, “prepared according to the manufacturing method of FIGS. 7A to 7D”, “the individual electrode 6, the color filter layer 11 and the transparent resin layer 12 are formed on both surfaces of the substrate 2, respectively, and the color filter layer 11 and the transparent resin are formed. A panel substrate with a color filter in which the layer 12 is smoothed is prepared. Next, as shown in FIG. 19, the panel substrate was sealed with a white display medium 3 </ b> W and a black display medium 3 </ b> B together with the insulating liquid 18 as display media in all the cells formed by the partition walls 4. The information display panel shown in FIG. 19 is obtained by bonding the substrate 1 with the individual electrode 5 which is another substrate on which the microcapsules 19 are arranged.

20A to 20F are diagrams showing examples of arrangement of color filters and black matrices in the information display panel of the present invention.
In FIG. 20A, red (R), green (G), blue (B), and colorless (W) color filters are arranged in 2 × 2, and a black matrix (BM) is arranged at all boundaries. An example is shown.
In FIG. 20B, red (R), green (G), blue (B), and colorless (W) color filters are arranged in 2 × 2, and the illustrated boundary portion (portion corresponding to a display unit). Only the black matrix (BM) is shown as an example.
In FIG. 20C, red (R), green (G), and blue (B) color filters are arranged in a row, and a black matrix (BM) is provided only at the illustrated boundary (the portion corresponding to the display unit). An example of arrangement is shown.
FIG. 20D shows an example in which red (R), green (G), and blue (B) color filters are arranged in a row, and a black matrix (BM) is arranged at all boundaries.
FIG. 20E shows an example in which red (R), green (G), and blue (B) color filters are arranged in a row. In this example, no black matrix (BM) is arranged.
FIG. 20 (f) shows an example in which red (R), green (G), blue (B), and colorless (W) color filters are arranged in a row and a black matrix (BM) is arranged at all boundaries. Show.

  In the above, the black matrix 14 formed on the portion of the color filter layer 11 cut by dry etching may be provided only in a necessary portion, and may not be provided in all the portions. It does not have to be provided. From the viewpoint that the black matrix arrangement position can be freely set, after the color filter material is arranged, the boundary portion is dry-etched, and then the black matrix material is arranged at a necessary portion by an ink jet method.

  According to the method for manufacturing a panel substrate with a color filter of the present invention, when producing a panel substrate with a color filter to be used for an information display panel that performs display by driving a display medium, the outside of the panel serving as an observation side is used. In order, a transparent resin layer, a color filter layer, a transparent substrate, a laminated structure that becomes an electrode or a conductive member made of a transparent conductive metal oxide or a transparent conductive polymer, or a transparent resin layer, a color filter layer, a transparent metal When forming a laminated structure to be an oxide layer, a transparent substrate, an electrode or a conductive member, after the color filter layer forming step, after performing a smoothing step of smoothing the surface of the color filter layer by polishing, a transparent resin layer A method for manufacturing a panel substrate with a color filter that smoothes the color filter layer and transparent resin layer is provided. Rukoto can.

Further, according to the method for producing a panel substrate with a color filter of the present invention, when producing a panel substrate with a color filter used for an information display panel that displays by driving a display medium, the outside of the panel on the observation side As an order from, a transparent resin layer, a color filter layer, a transparent substrate, a laminated structure that becomes an electrode or a conductive member made of a transparent conductive metal oxide or a transparent conductive polymer, or a transparent resin layer, a color filter layer, When forming a laminated structure to be a transparent metal oxide layer, a transparent substrate, an electrode or a conductive member, a transparent resin layer 1 is formed on the surface of the color filter layer after the color filter layer forming step. After the surface is smoothed, the transparent resin layer 2 is further formed and the smoothing resin layer forming step is performed, so the color filter layer and the transparent resin layer are smoothed. Manufacturing method of the color filter with the panel substrate can be provided.
At that time, in order to form the transparent resin layer 1 and smooth the surface of the transparent resin layer, a smoothing process by polishing can be used. In this case, the transparent resin layer 2 formed thereon is further formed. The transparent resin layer 1 is preferably made of the same material.

Moreover, according to the panel substrate with a color filter of the present invention produced by the method for producing a panel substrate with a color filter of the present invention, the panel substrate with a color filter is obtained by smoothing the color filter layer and the transparent resin layer.

  Furthermore, according to the information display panel of the present invention, the information display panel includes the panel substrate with a color filter of the present invention and another panel substrate, and the space between the two panel substrates. A cell is formed in accordance with the number and arrangement position of the color filters, and at least one type of display medium is sealed in the cell, and an electric field is applied to the display medium, and the display medium is moved to move information such as an image. Since the information display panel performs display, the information display panel is configured using a panel substrate with a color filter in which the color filter layer and the transparent resin layer are smoothed.

  Hereafter, each member which comprises the panel substrate with a color filter of this invention and the information display panel using the same is demonstrated.

  As for the substrate, the substrate of the panel substrate with a color filter of the present invention provided on the display surface side is a transparent substrate from which the color of the display medium can be confirmed from the outside of the panel, and a material having high visible light transmittance and good heat resistance is used. Is preferred. The back side substrate of the information display panel may be a transparent substrate or an opaque substrate. Examples of the substrate include inorganic substrates such as glass and ceramics, polyethylene terephthalate (PET), polyethylene terephthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), and polyethersulfone (PES). Organic polymer substrates such as acrylic can be used. The thickness of the substrate is preferably from 2 to 5000 μm, more preferably from 5 to 2000 μm. If it is too thin, it will be difficult to maintain the strength and the spacing uniformity between the substrates, and if it is thicker than 5000 μm, it will be a thin information display panel. Is inconvenient.

  Examples of materials for forming electrodes and conductive members provided on the substrate include metals such as aluminum, silver, nickel, copper, and gold, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), conductive tin oxide, Examples include conductive metal oxides such as antimony tin oxide (ATO) and conductive zinc oxide, and conductive polymers such as polyaniline, polypyrrole, and polythiophene, which are appropriately selected and used. The electrode can be formed by patterning the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or by mixing a conductive agent with a solvent or synthetic resin binder. A method of applying and patterning is used. The electrodes and conductive members provided on the viewing side (display surface side) substrate need to be transparent, but the electrodes and conductive members provided on the back side substrate do not need to be transparent. In any case, the above-mentioned material that is conductive and capable of pattern formation can be suitably used. The thickness of the electrode and the conductive member is not particularly limited as long as the conductivity can be secured and the light transmittance is not hindered, and is preferably 3 to 1000 nm, preferably 5 to 400 nm. The materials and thicknesses of the electrodes and conductive members provided on the back side substrate are the same as those of the electrodes and conductive members provided on the display surface side substrate described above, but need not be transparent. In this case, the external voltage input may be superimposed with direct current or alternating current.

The shape of the partition provided on the substrate is appropriately set according to the type of display medium involved in display, the shape and arrangement of the electrodes to be arranged, and is not generally limited. However, the width of the partition is 2 to 100 μm, preferably 3 The height of the partition wall is adjusted to 10 to 100 μm, preferably 10 to 50 μm.
In forming the partition wall, a both-rib method in which ribs are formed on each of the opposing substrates 1 and 2 and then bonded, and a single-rib method in which ribs are formed only on one substrate are conceivable. In the present invention, any method is preferably used. A partition wall can also be provided on the panel substrate with a color filter of the present invention.
As shown in FIG. 21, the cells formed by the partition walls composed of these ribs are illustrated in a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape as viewed from the substrate plane direction. And a mesh shape. It is better to make the portion corresponding to the cross section of the partition wall visible from the display surface side (the area of the cell frame) as small as possible, and the display state becomes clearer.
Examples of the method for forming the partition include a mold transfer method, a screen printing method, a sand blast method, a photolithography method, and an additive method. Any of these methods can be suitably used for an information display panel mounted on the information display device of the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitably used.

  Next, the powder fluid used as the display medium in the present invention will be described. As for the name of the powder fluid used in the present invention, the present applicant has obtained the right of “Electronic Powder Fluid (registered trademark): Registration No. 4636931”.

  The “powder fluid” in the present invention is a substance in an intermediate state of both fluid and particle characteristics that exhibits fluidity by itself without borrowing the force of gas or liquid. For example, liquid crystal is defined as an intermediate phase between a liquid and a solid, and has fluidity that is a characteristic of liquid and anisotropy (optical properties) that is a characteristic of solid (Heibonsha: Encyclopedia) . On the other hand, the definition of particle is an object with a finite mass even if it is negligible, and is said to be affected by gravity (Maruzen: Physics Encyclopedia). Here, even in the case of particles, there are special states of gas-solid fluidized bed and liquid-solid fluids. When gas is flowed from the bottom plate to the particles, upward force is applied to the particles according to the velocity of the gas. Is a gas-solid fluidized bed that is in a state where it can easily flow when it balances with gravity, and it is also called a liquid-solid fluidized state that is fluidized by a fluid (ordinary) Company: Encyclopedia). As described above, the gas-solid fluidized bed body and the liquid-solid fluid are in a state of using a gas or liquid flow. In the present invention, it has been found that a substance in a state of fluidity can be produced specifically without borrowing the force of such gas and liquid, and this is defined as powder fluid.

  That is, the pulverulent fluid in the present invention is in an intermediate state having both the characteristics of particles and liquid, as in the definition of liquid crystal (liquid and solid intermediate phase), and is the characteristic of the above-mentioned particles. It is a substance that is extremely unaffected and exhibits a unique state with high fluidity. Such a substance can be obtained in an aerosol state, that is, a dispersion system in which a solid or liquid substance is stably suspended as a dispersoid in a gas, and the solid substance is used as a dispersoid in the present invention.

The information display panel of the present invention encloses a powder fluid exhibiting high fluidity in an aerosol state in which solid particles are stably suspended as a dispersoid, for example, in a gas between opposing substrates, at least one of which is transparent. Yes, such pulverulent fluid is so fluid that it cannot measure the angle of repose, which is an index indicating the fluidity of the powder, and it can be easily and stably moved by Coulomb force with a small electric field. Can do.
As described above, the pulverized fluid used in the present invention is a substance in the intermediate state of both fluid and particle characteristics that exhibits fluidity by itself without borrowing the force of gas or liquid. This powder fluid can be made into an aerosol state in particular, and in an information display panel, a solid substance is used as a display medium in a state where it floats relatively stably as a dispersoid in gas.

Next, display colored particles (hereinafter also referred to as particles) constituting a display medium in an information display panel using the panel substrate with a color filter of the present invention will be described. The colored particles for display are composed of the colored particles for display as they are to form a display medium, or are combined with other particles to form a display medium. Or used.
The particles can contain a charge control agent, a colorant, an inorganic additive, and the like, if necessary, in the resin as the main component, as in the conventional case. Examples of resins, charge control agents, colorants, and other additives will be given below.

  Examples of the resin include urethane resin, urea resin, acrylic resin, polyester resin, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, acrylic fluororesin, silicone resin, acrylic silicone resin, epoxy resin, polystyrene resin, styrene Acrylic resin, polyolefin resin, butyral resin, vinylidene chloride resin, melamine resin, phenol resin, fluororesin, polycarbonate resin, polysulfone resin, polyether resin, polyamide resin and the like can be mentioned, and two or more kinds can be mixed. In particular, acrylic urethane resin, acrylic silicone resin, acrylic fluororesin, acrylic urethane silicone resin, acrylic urethane fluororesin, fluororesin, and silicone resin are suitable from the viewpoint of controlling the adhesive force with the substrate.

  The charge control agent is not particularly limited. Examples of the negative charge control agent include salicylic acid metal complexes, metal-containing azo dyes, metal-containing oil-soluble dyes (including metal ions and metal atoms), and quaternary ammonium salt systems. Examples thereof include compounds, calixarene compounds, boron-containing compounds (benzyl acid boron complexes), and nitroimidazole derivatives. Examples of the positive charge control agent include nigrosine dyes, triphenylmethane compounds, quaternary ammonium salt compounds, polyamine resins, imidazole derivatives, and the like. In addition, metal oxides such as ultrafine silica, ultrafine titanium oxide, ultrafine alumina, nitrogen-containing cyclic compounds such as pyridine and derivatives and salts thereof, various organic pigments, resins containing fluorine, chlorine, nitrogen, etc. are also charged. It can also be used as a control agent.

  As the colorant, various organic or inorganic pigments and dyes as exemplified below can be used.

Examples of the black colorant include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon and the like.
Examples of blue colorants include C.I. I. Pigment blue 15: 3, C.I. I. Pigment Blue 15, Bituminous Blue, Cobalt Blue, Alkaline Blue Lake, Victoria Blue Lake, Phthalocyanine Blue, Metal-free Phthalocyanine Blue, Phthalocyanine Blue Partial Chlorides, Fast Sky Blue, Indanthrene Blue BC, and the like.
Examples of red colorants include bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, resol red, pyrazolone red, watching red, calcium salt, lake red D, brilliant carmine 6B, eosin lake, rhodamine lake B, Alizarin Lake, Brilliant Carmine 3B, C.I. I. Pigment Red 2 etc.

Yellow colorants include chrome yellow, zinc yellow, cadmium yellow, yellow iron oxide, mineral first yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Quinoline Yellow Lake, Permanent Yellow NCG, Tartrazine Lake, C.I. I. Pigment Yellow 12 etc.
Examples of green colorants include chrome green, chromium oxide, pigment green B, C.I. I. Pigment Green 7, Malachite Green Lake, Final Yellow Green G, etc.
Examples of the orange colorant include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, indanthrene brilliant orange RK, benzidine orange G, indanthrene brilliant orange GK, C.I. I. Pigment Orange 31 etc.
Examples of purple colorants include manganese purple, first violet B, and methyl violet lake.
Examples of white colorants include zinc white, titanium oxide, antimony white, and zinc sulfide.

  Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white. Examples of various dyes such as basic, acidic, disperse, and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.

Examples of inorganic additives include titanium oxide, zinc white, zinc sulfide, antimony oxide, calcium carbonate, lead white, talc, silica, calcium silicate, alumina white, cadmium yellow, cadmium red, cadmium orange, titanium yellow, Examples include bitumen, ultramarine blue, cobalt blue, cobalt green, cobalt violet, iron oxide, carbon black, manganese ferrite black, cobalt ferrite black, copper powder, and aluminum powder.
These pigments and inorganic additives can be used alone or in combination. In addition, white particles for display and black particles for display constituting the display medium used in the present invention can be produced by combining a plurality of the above-described additives. Among these, white pigments such as titanium oxide are preferably used for the display white particles, and black pigments such as carbon black are preferably used for the display black particles.
Colored particles for display having a desired color can be produced by blending the colorant. In the present invention, display white particles and display black particles are prepared and used.

  Further, the colored particles for display (hereinafter, also referred to as particles) used in the present invention have an average particle diameter d (0.5) in the range of 1 to 20 μm and are preferably uniform. If the average particle diameter d (0.5) is larger than this range, the display is not clear. If the average particle diameter d (0.5) is smaller than this range, the cohesive force between the particles becomes too large, which hinders movement as a display medium.

Furthermore, in the present invention, regarding the particle size distribution of each particle, the particle size distribution Span represented by the following formula is less than 5, preferably less than 3.
Span = (d (0.9) −d (0.1)) / d (0.5)
(However, d (0.5) is a numerical value expressing the particle diameter in μm that 50% of the particles are larger than this and 50% is smaller than this, and d (0.1) is a particle in which the ratio of the smaller particles is 10%. (Numerical value expressed in μm, and d (0.9) is a numerical value expressed in μm for a particle diameter of 90% or less.)
By keeping Span within a range of 5 or less, the size of each particle is uniform, and movement as a uniform display medium becomes possible.

  Furthermore, regarding the correlation between the particles, the ratio of d (0.5) of the particles having the minimum diameter to d (0.5) of the particles having the maximum diameter among the used particles is set to 50 or less, preferably 10 or less. It is essential. Even if the particle size distribution Span is reduced, particles with different charging characteristics move in opposite directions, so that the particle size is close to each other and each particle can be easily moved in the opposite direction by the equivalent amount. This is within this range.

The particle size distribution and the particle size can be obtained from a laser diffraction / scattering method or the like. When laser light is irradiated onto particles to be measured, a light intensity distribution pattern of diffracted / scattered light is spatially generated, and this light intensity pattern has a corresponding relationship with the particle diameter, so that the particle diameter and particle diameter distribution can be measured. .
Here, the particle size and particle size distribution in the present invention are obtained from a volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, particles are introduced into a nitrogen stream, and the attached analysis software (software based on volume-based distribution using Mie theory) The diameter and particle size distribution can be measured.

Furthermore, when applying a display medium such as a particle group composed of colored particles for display or a powdered fluid to an information display panel that is driven in a gas medium space, the management of gas in the space surrounding the display medium between the substrates is possible. It is important and contributes to improved display stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, and preferably 50% RH or less for the humidity of the gas in the gap.
This gap portion is shown in FIGS. 1A, 1B, 2A, 2B, 3A, 3B, 4A to 4D, and 14B. 15 (b), FIG. 16 (b), and FIG. 17 (b), electrodes 5 and 6 (when electrodes are provided inside the substrate) from the portion sandwiched between the opposing substrate 1 and substrate 2; A gas portion in contact with a so-called display medium excluding an occupied portion of the display medium 3, an occupied portion of the partition wall 4 (when a partition wall is provided), and a seal portion of the information display panel is meant.
The gas in the gap is not limited as long as it is in the humidity region described above, but dry air, dry nitrogen, dry argon, dry helium, dry carbon dioxide, dry methane, and the like are preferable. This gas needs to be sealed in the information display panel so that the humidity is maintained. For example, the display medium is sealed and the information display panel is assembled in a predetermined humidity environment. It is important to apply a sealing material and a sealing method that prevent moisture from entering from the outside.

In the information display panel using the panel substrate with a color filter of the present invention, the distance between the substrate and the substrate is not limited as long as the display medium can be moved and the contrast can be maintained, but is usually adjusted to 10 to 500 μm, preferably 10 to 200 μm. The
The volume occupation ratio of the display medium in the gas space between the opposing substrates is preferably 5 to 70%, more preferably 5 to 60%. When it exceeds 70%, the movement as a display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.
The information display panel to which the panel substrate with a color filter of the present invention is applied is not limited to the above, and can be applied to an information display panel such as a liquid crystal system, an electrophoresis system, and a rotating ball system.

Information display panels using a panel substrate with a color filter manufactured by the manufacturing method of the present invention are mobile devices such as notebook computers, electronic notebooks, portable information devices called PDA (Personal Digital Assistants), mobile phones, handy terminals and the like. Display section of equipment, electronic paper such as electronic books, electronic newspapers, electronic manuals (electronic instruction manuals), signboards, posters, bulletin boards such as blackboards and whiteboards, display sections for electronic desk calculators, home appliances, automobile supplies, In addition to point card, IC card and other card display units, electronic advertisements, information boards, electronic POPs (Point Of Presence, Point Of Purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, RF-ID device display units, It is suitably used for display units of various electronic devices such as POS terminals, car navigation devices, and watches.
The information display panel driving method according to the present invention includes a simple matrix driving method and a static driving method that do not use a switching element in the panel itself, and a three-terminal switching device or a thin film diode represented by a thin film transistor (TFT). An active matrix driving method using a two-terminal switching element represented by (TFD), an external electric field driving method in a display panel (so-called rewritable paper) of a type that does not have a driving circuit using an external electric field forming means, etc. A driving method corresponding to various types of display panels can be used.

(A), (b) is a figure which shows the fundamental structure of the information display panel of this invention. (A), (b) is a figure which shows the fundamental structure of the information display panel of this invention. (A), (b) is a figure which shows the fundamental structure of the information display panel of this invention. (A)-(d) is a figure which shows the principle structure of the information display panel of this invention. (A), (b) is a figure which shows the fundamental structure of the information display panel of this invention. (A), (b) is a figure which shows the fundamental structure of the information display panel of this invention. (A)-(d) is a figure for demonstrating an example of the manufacturing method of the panel substrate with a color filter of this invention. (A)-(d) is a figure for demonstrating the other example of the manufacturing method of the panel board | substrate with a color filter of this invention. (A)-(h) is a figure for demonstrating the method to arrange | position a color filter layer to a panel substrate with a black matrix among the manufacturing methods of the panel substrate with a color filter of this invention. (A)-(h) is a figure for demonstrating the other example of the manufacturing method of the panel board | substrate with a color filter of this invention. (A)-(h) is a figure for demonstrating the other example of the manufacturing method of the panel board | substrate with a color filter of this invention. (A)-(h) is a figure for demonstrating the other example of the manufacturing method of the panel board | substrate with a color filter of this invention. (A)-(h) is a figure for demonstrating the other example of the manufacturing method of the panel board | substrate with a color filter of this invention. (A), (b) is a figure for demonstrating an example of the preparation methods of the information display panel using the panel substrate with a color filter of this invention. (A), (b) is a figure for demonstrating the other example of the preparation methods of the panel for information displays using the panel substrate with a color filter of this invention. (A), (b) is a figure for demonstrating the other example of the preparation methods of the panel for information displays using the panel substrate with a color filter of this invention. (A), (b) is a figure for demonstrating the other example of the preparation methods of the panel for information displays using the panel substrate with a color filter of this invention. It is a figure for demonstrating the other example of the information display panel using the panel board | substrate with a color filter of this invention. It is a figure for demonstrating the other example of the information display panel using the panel board | substrate with a color filter of this invention. (A)-(f) is a figure which shows the example of arrangement | positioning of the color filter and black matrix in the information display panel of this invention. It is a figure which shows an example of the shape of the partition in the information display panel used as the object of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Back side board | substrate 2 Display side transparent substrate 3 Display medium (particle group, powder fluid)
3W White display medium 3B Black display medium 3Wa White particles for display 3Ba Black particles for display 4 Partition 5 Electrode 6 Transparent electrode 8 Rotating ball 9 Microcapsule 11, 11R, 11G, 11B Color filter 12 Transparent resin layer (protective layer)
13 Mask 13a Color filter placement part 13b Boundary part (color mixing part)
14 Black matrix (or black matrix material layer)
15 Transparent oxide layer (moisture permeable barrier layer)
16 Transparent resin layer (protective layer)
17 transparent conductive member layer 18 insulating liquid 19 microcapsule 21-1, 21-2, 21-3 cell 22R, 22G, 22B color filter 23, 24 external electric field forming means 25, 26 conductive member

Claims (10)

A method of manufacturing a panel substrate with a color filter for use in an information display panel that displays by driving a display medium,
When forming a laminated structure to be an electrode or conductive member made of a transparent resin layer, a color filter layer, a transparent substrate, a transparent conductive metal oxide or a transparent conductive polymer, in order from the outside of the panel on the observation side A method for producing a panel substrate with a color filter, comprising forming a transparent resin layer after performing a smoothing step of smoothing the surface of the color filter layer by polishing after the color filter layer forming step. A method of manufacturing a panel substrate with a color filter for use in an information display panel that displays by driving a display medium,
When forming a laminated structure to be an electrode or conductive member made of a transparent resin layer, a color filter layer, a transparent substrate, a transparent conductive metal oxide or a transparent conductive polymer, in order from the outside of the panel on the observation side After the color filter layer forming step, the transparent resin layer 1 is formed on the surface of the color filter layer to smooth the surface of the transparent resin layer 1, and then the transparent resin layer 2 is further formed and the smoothed resin layer forming step A method for producing a panel substrate with a color filter, comprising: A method of manufacturing a panel substrate with a color filter for use in an information display panel that displays by driving a display medium,
As an order from the outside of the panel on the observation side, when forming a laminated structure to be a transparent resin layer, a color filter layer, a transparent metal oxide layer, a transparent substrate, an electrode or a conductive member, after the color filter layer forming step, A method for producing a panel substrate with a color filter, comprising forming a transparent resin layer after performing a smoothing step of smoothing the surface of the color filter layer by polishing. A method of manufacturing a panel substrate with a color filter for use in an information display panel that displays by driving a display medium,
As an order from the outside of the panel on the observation side, when forming a laminated structure to be a transparent resin layer, a color filter layer, a transparent metal oxide layer, a transparent substrate, an electrode or a conductive member, after the color filter layer forming step, A color filter comprising: forming a transparent resin layer 1 on a surface of a color filter layer to smooth the surface of the transparent resin layer 1; and further forming a transparent resin layer 2 to perform a smoothing resin layer forming step. A method for manufacturing a panel substrate.   In order to form the transparent resin layer 1 and smooth the surface of the transparent resin layer, a smoothing process by polishing is used, and the transparent resin layer 2 formed thereon is made of the same material as the transparent resin layer 1. The method for producing a panel substrate with a color filter according to claim 2 or 4, wherein the method is a product.   The method for producing a panel substrate with a color filter according to claim 3, wherein the transparent substrate is a transparent resin substrate.   The method for producing a panel substrate with a color filter according to any one of claims 1 to 6, wherein the color filter layer is a black matrix color filter layer.   A panel substrate with a color filter constituting an information display panel produced by the method for producing a panel substrate with a color filter according to any one of claims 1 to 7.   An information display panel comprising the panel substrate with a color filter according to claim 8 and another panel substrate, wherein the cells are arranged in the space between the two panel substrates in accordance with the number and arrangement positions of the color filters. An information display panel characterized by forming at least one type of display medium in the cell, applying an electric field to the display medium, and moving the display medium to display information such as an image .   The information display panel according to claim 9, wherein the display medium is made of at least one kind of particles and has optical reflectivity and chargeability.

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