JP2009288522A - Panel for information display and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for uniformizing a filling amount of cells with particle groups as a display medium and inexpensively obtaining a panel for information display with high productivity. <P>SOLUTION: One transparent substrate 2 on which a barrier wall part 4-2-2 functioning to both secure a gap between substrates and partition the space between the substrates is formed, is laminated with the other substrate 1 on which a barrier wall part 4-2-1 exclusively for partitioning the space between substrates is formed, to obtain a panel structure; and the panel structure has a plurality of cells 7 partitioned by barrier walls 4-2, in which particles having an optical reflectance and capable of being electrically driven are disposed by using a mask 11 having a large opening regardless of the opening of cells. The barrier wall parts 4-2-1 and 4-2-2 formed on the substrates 1 and 2, respectively, exclusively for partitioning the space between the substrates are opposed to each other through a gap D1 or with particles 3Wa and 3Ba constituting the groups of particles 3W, 3B as a display medium and having an average particle diameter D0 partially interposed therebetween. The panel structure is configured to satisfy D0≤D1≤1.5×D0. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, at least one of the substrates is transparent, in order to partition the space between the substrates exclusively, one substrate formed with a partition wall portion that serves to secure a predetermined inter-substrate gap and partition the space between the substrates. In the multiple cells partitioned by the partition walls of the panel structure that is bonded to the other substrate on which the partition wall portion is formed with a predetermined inter-substrate gap, it has optical reflectivity and can be electrically driven The present invention relates to an information display panel in which a display medium configured as a particle group including various particles is disposed, and information such as an image is displayed by electrically driving the display medium, and a manufacturing method thereof.

  Conventionally, as a particle movement type information display panel that drives a group of particles containing electrically drivable particles as a display medium, the substrates constituting the panel are configured by partitioning and surrounded by the partition There is known an information display panel in which a group of particles containing charged particles is enclosed in a small room (cell) as a display medium, an electric field is applied to the display medium, and the display medium is moved to display information such as an image. It has been.

  Furthermore, as the above-mentioned information display panel of the charged particle movement system, the partition wall is provided on both of the substrates constituting the panel, and the height of the intersection part of the partition wall is made higher than the height of the other parts, An information display panel is also known in which a gap is formed in a part of a partition when a substrate constituting the panel is bonded (see, for example, Patent Document 1).

  Furthermore, in the particle filling process when manufacturing a charged particle movement type display panel that drives a group of particles containing chargeable particles as a display medium, a flat mask is placed on the panel substrate, and the particles are applied from above the panel substrate. It is also known that a method of dropping particles and arranging particles on a panel substrate corresponding to the mask opening is used.

  FIGS. 6A to 6E and FIGS. 7A to 7C are views for explaining an example of a method for manufacturing a conventional information display panel using a flat mask. A conventional method for manufacturing an information display panel will be described with reference to FIGS. 6A to 6E. First, as shown in FIG. 6A, a cell 57 is formed on a partition wall 54 formed on a panel substrate 51. A flat mask 62 having an opening 61 is placed on the first display medium particle group (in this example, a white display medium 53W which is a particle group including negatively charged white particles 53Wa) from above the mask 62. The white display medium 3 </ b> W is placed in the cell 57 on the panel substrate 51 that is partitioned by the partition wall 54, corresponding to the opening 61 of the mask 62. Next, as shown in FIG. 6B, the second display medium particle group (in this example, the black display medium 3B, which is a particle group including the positively charged black particles 53Ba) is dropped from above the mask 62. Then, it is arranged on the white display medium 53W that has already been arranged. Next, as shown in FIG. 6C, the mask 62 is removed, and an adhesive 63 for attaching the panel substrate is disposed on the partition wall 54. Finally, as shown in FIG. 6 (d), the other panel substrate 52 is bonded to the panel substrate 51 on which the adhesive 63 has been placed, and as shown in FIG. 6 (e), the information display panel Is making. In the example shown in FIGS. 7A to 7C, the above-described FIGS. 6A to 6E are placed in the cell 57 on one of the two substrates 51 on which the partition wall 54 is formed. After two types of display media 3W and 3B (particle groups) are arranged in the same manner as in FIG. 7 (FIG. 7A), an adhesive 63 is arranged on the top of the partition wall 54 on one of the substrates 51 (FIG. 7). 7 (b)) The tops of the partition walls 54 on the two substrates 51 and 52 are joined and bonded together to produce an information display panel (FIG. 7C).

JP 2006-23541 A

  In an information display panel using a particle group as a display medium, including a charged particle movement type information display panel that drives a particle group containing a chargeable particle as a display medium, the particle group having an average particle diameter of 1 to 20 μm Was filled in a larger cell, with a size of about 200 μm as the lower limit. When filling, a mask having an opening corresponding to the cell opening is used. When the cell opening is smaller than about 200 μm, for example, about 100 μm, the mask opening is also about 100 μm. In this case, the particles pass through the mask opening. There was a problem that the amount of particles filled in the cell became uneven and the amount of particles filled was uneven.

  That is, as shown in FIGS. 8A to 8D, the manufacturing process corresponding to FIGS. 6A to 6E is used, and when a mask 62 having a small mask opening is used, FIG. As shown, the filling amount of the white particles 53Wa as the first display medium particle group becomes non-uniform, and as shown in FIG. 8B, the black particles 53Ba as the next second display medium particle group are filled. As a result, the amount of adhesive becomes uneven, and as a result, the adhesive 63 is disposed on the partition wall 54 as shown in FIG. 8C, and the other substrate 52 is bonded as shown in FIG. 8D. In the obtained information display panel, the filling amount of the particle group serving as the display medium for each cell 57 becomes non-uniform. 9A to 9D also show the manufacturing processes corresponding to FIGS. 7A to 7C, respectively, when the mask 62 having a small mask opening is used, similarly, finally, In the obtained information display panel, the filling amount of the particle group serving as the display medium for each cell 57 becomes non-uniform.

  Moreover, even if the cell opening is 200 μm or more, for example, about 300 μm, it is problematic that preparing a mask having an opening that matches the cell opening results in an expensive mask due to the complexity of the mask manufacturing process. It was.

  An object of the present invention is to obtain an information display panel having a structure that can be manufactured without using the above-described problems by using a mask having a large opening irrespective of cell openings, and an information display panel having the structure with low productivity and low cost. The manufacturing method for this is intended to be provided.

  The information display panel according to the present invention has at least one transparent substrate, and is formed between one substrate on which a partition wall portion that serves to secure a predetermined inter-substrate gap and partition a space between the substrates is formed, and exclusively between the substrates In the plurality of cells partitioned by the partition wall of the panel structure, which is bonded to the other substrate on which the partition wall portion for partitioning the space is formed, with a predetermined inter-substrate gap, has optical reflectance, An information display panel in which a display medium configured as a particle group including electrically drivable particles is disposed, and information such as an image is displayed by electrically driving the display medium, on both the substrates The partition portions that are formed by dividing each other and exclusively partition the space between the substrates face each other with a gap D1, or partially sandwich particles constituting a particle group serving as a display medium having an average particle diameter of D0. so Be one countercurrent, this time, it is characterized in that satisfy D0 ≦ D1 ≦ 1.5 × D0.

  As a preferred example of the information display panel according to the present invention, a predetermined gap between the substrates and a space between the substrates are formed among the partition walls for dividing the space between the substrates. An adhesive layer having a thickness of 1 μm to D0 / 2 is formed on the partition wall portion for exclusively partitioning the space between the substrates formed on the substrate that is not the substrate on which the partition wall portion that also functions as a partition is formed. The gap D1 formed when the partition wall portions for partitioning the space between the substrates are arranged opposite to each other is located in the vicinity of the center in the inter-substrate gap, and the space between the substrates exclusively. The gap D1 formed when the partition wall portions for partitioning are arranged to face each other may be at a position close to the back side substrate in the inter-substrate gap.

  In addition, in the method for manufacturing an information display panel according to the present invention, at least one of the substrates is transparent, and one substrate on which a partition wall portion that serves to secure a predetermined inter-substrate gap and partition a space between the substrates is formed. And optically reflected in a plurality of cells partitioned by partition walls of a panel structure in which a partition portion for partitioning a space between the substrates is formed with a predetermined gap between the substrates. An information display panel having the above-described configuration, in which a display medium configured as a particle group including particles that can be electrically driven is disposed, and information such as an image is displayed by electrically driving the display medium The method includes: filling a display medium into a cell on a substrate formed with a partition wall portion that serves to secure a predetermined gap between the two substrates and partition a space between the substrates. On this board On the top of the partition wall part that serves to ensure the gap between the predetermined substrates formed and partition the space between the substrates and on the top of the partition wall part for partitioning the space between the substrates exclusively formed on the other substrate, An adhesive is disposed, and two substrates are bonded to form a panel structure.

  In the present invention, the partition wall portion for securing the gap between the substrates is provided on one substrate, and the partition wall portion for cell formation is arranged separately on both substrates so as to face each other with a gap D1 when the panel is formed. The mask opening can be made larger than 200 μm so that the top of the partition wall for securing the inter-substrate gap can be reliably masked, and the other partition walls for cell formation can be masked or not masked. An information display panel in which the particle groups to be arranged are accurately arranged in a cell having an opening smaller than 200 μm can be obtained at low cost.

  In particular, in an information display panel that performs color display using a white display medium, a black display medium, and three primary color filters, an area corresponding to at least three RGB color filters is set as one display unit. The size of the corresponding pixel (pixel) is required to be as small as possible in terms of high-definition color display. Even in such a case, the particle group can be arranged with high accuracy in a cell having an opening smaller than 200 μm. At the same time, the top of the partition for securing the gap between the substrates, which becomes the bonding part when bonding the substrates together at the mask part, can be reliably masked with a low-cost mask, so it is possible to prevent harmful effects due to particle adhesion to the bonding part and display performance An excellent information display panel can be obtained at low cost.

  First, a basic configuration of an information display panel of a charged particle movement type will be described as an example of an information display panel that is an object of the present invention. In the information display panel, an electric field is applied to a display medium configured as a particle group including a chargeable particle 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 stability when rewriting the display repeatedly or when displaying the display information continuously. 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.

  Hereinafter, an example of a charged particle movement type information display panel manufactured by using the manufacturing method of the present invention will be described with reference to FIGS. 1 (a) to (c) to FIGS. 3 (a) to (c).

  In the example shown in FIGS. 1A to 1C, two or more kinds of display media each including a particle group including particles having at least optical reflectance and chargeability, and having different optical reflectance and charging characteristics from each other. (Here, a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium 3B configured as a particle group including positively charged black particles 3Ba are shown). In each cell 7 formed by 4, a voltage is applied between a pair of pixel electrodes formed by an electrode 5 (line electrode) provided on the substrate 1 and an electrode 6 (line electrode) provided on the substrate 2 facing each other. The substrate is moved perpendicular to the substrates 1 and 2 in accordance with the electric field generated by the application. Then, as shown in FIG. 1A, the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 1B, the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted. The line electrodes 5 and 6 are pixels that are orthogonally opposed so as to form a dot electrode pair corresponding to each cell 7, and an RGB color filter is disposed corresponding to each pixel (in other words, each cell 7). Color display.

  In this embodiment, as shown in FIG. 1A and FIG. 1B, as shown in an example in which two partition walls constituting the cell forming partition wall portion are provided between the partition walls arranged as the partition gap securing substrate gap, The partition walls 4 are formed corresponding to (1) a plurality of cells 7 (in this example, 3 × 3 = 9 cells 7 as shown in FIG. 1C when the panel is viewed from above). A partition portion 4-1 for securing a gap between substrates for maintaining a gap between substrates of the information display panel, and (2) a partition portion for securing a gap between substrates. 4-1 is formed in a portion other than 4-1 and has a gap 8 or white particle 3 Wa between the substrates 1 and 2, and a cell-forming partition wall portion 4-2 for forming each cell 7 of the information display panel. It is composed. Further, in the present embodiment, the inter-substrate gap securing partition wall portion 4-1 is formed on the substrate 2 at a height corresponding to the desired inter-substrate gap, and the gap 8 for partitioning the other inter-substrate spaces into the cells 7 is formed. Alternatively, the height of both the partition walls 4-2-1 and 4-2-2 is adjusted so that the cell-forming partition wall part 4-2 having the white particles 3 Wa overlaps with both the substrates 1 and 2. The length is less than the height of the inter-substrate gap securing partition wall portion 4-1, and the distance between the inter-substrate gap securing partition wall portion 4-1 and the substrate 1 on the back side and the partition wall 4-2-1. The adhesive 9 is disposed on the top of the substrate, and the inter-substrate gap securing partition wall portion 4-1 and the other substrate 1 are bonded and bonded together. In this example, the white particles 3 </ b> W sandwiched between the partition 4-2-1 and the partition 4-2-2 constituting the cell forming partition part 4-2 are fixed by the adhesive 9. When the opposing gap 8 is D1 and the average particle diameter of the particle group constituting the display medium is D0, D0 ≦ D1 ≦ 1.5 × D0 is set, and the thickness of the adhesive layer to be arranged is 1 μm. When the position of the gap 8 is in the vicinity of the middle between the substrates, the panel substrate can be bonded without distortion, and the display rewrite performed by reversing the particle group is repeated while the particles are repeatedly displayed. Since it can suppress moving to an adjacent cell, it is preferable.

  In the example shown in FIGS. 2A to 2C, at least two types of display media, each of which includes particles having at least optical reflectance and chargeability, and have different optical reflectance and charging characteristics from each other. As described above, the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa and the black display medium 3B configured as the particles including the positively charged black particles 3Ba are shown between the substrates. In each cell 7 formed by 4, according to the electric field generated by applying a voltage between the electrode 5 (pixel electrode) provided on the substrate 1 and the electrode 6 (pixel electrode) provided on the substrate 2, Move perpendicular to the substrates 1 and 2. Then, as shown in FIG. 2 (a), the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 2 (b), the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted. In this case as well, as in FIG. 1 described above, color display can be achieved by combining color filters.

  In this embodiment, as shown in FIGS. 2A and 2B, an example in which two partition walls constituting a partition wall portion for cell formation are provided between partition walls arranged as partition wall portions for securing an inter-substrate gap, The partition wall 4 is formed corresponding to (1) a plurality of cells 7 (in this example, 3 × 3 = 9 cells 7 as shown in FIG. 2C when the panel is viewed from above). A partition portion 4-1 for securing a gap between substrates for maintaining a gap between substrates of the information display panel, and (2) a partition portion for securing a gap between substrates. 4-1 is formed in a portion other than 4-1 and has a gap 8 or white particle 3 Wa between the substrates 1 and 2, and a cell-forming partition wall portion 4-2 for forming each cell 7 of the information display panel. It is composed. Further, in the present embodiment, the inter-substrate gap securing partition wall portion 4-1 is formed on the substrate 2 at a height corresponding to the desired inter-substrate gap, and the gap 8 for partitioning the other inter-substrate spaces into the cells 7 is formed. Alternatively, the height of both the partition walls 4-2-1 and 4-2-2 is adjusted so that the cell-forming partition wall part 4-2 having the white particles 3 Wa overlaps with both the substrates 1 and 2. The length is less than the height of the inter-substrate gap securing partition wall portion 4-1, and the distance between the inter-substrate gap securing partition wall portion 4-1 and the substrate 1 on the back side and the partition wall 4-2-1. The adhesive 9 is disposed on the top of the substrate, and the inter-substrate gap securing partition wall portion 4-1 and the other substrate 1 are bonded and bonded together. In this example, the white particles 3 </ b> W sandwiched between the partition 4-2-1 and the partition 4-2-2 constituting the cell forming partition part 4-2 are fixed by the adhesive 9. When the opposing gap 8 is D1 and the average particle diameter of the particle group constituting the display medium is D0, D0 ≦ D1 ≦ 1.5 × D0 is set, and the thickness of the adhesive layer to be arranged is 1 μm. When the position of the gap 8 is in the vicinity of the middle between the substrates, the panel substrate can be bonded without distortion, and the display rewrite performed by reversing the particle group is repeated while the particles are repeatedly displayed. Since it can suppress moving to an adjacent cell, it is preferable.

  In the example shown in FIGS. 3A to 3C, two or more kinds of display media each including a particle group including particles having at least optical reflectance and chargeability, and having different optical reflectance and charging characteristics from each other. (Here, a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium 3B configured as a particle group including positively charged black particles 3Ba are shown). In each cell 7 formed by 4, a voltage is applied between a pair of pixel electrodes formed by an electrode 5 (line electrode) provided on the substrate 1 and an electrode 6 (line electrode) provided on the substrate 2 facing each other. The substrate is moved perpendicular to the substrates 1 and 2 in accordance with the electric field generated by the application. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 3A, or white dot display is performed, or the black display medium 3B is visually recognized by the observer as shown in FIG. Black dots are displayed. In addition, in FIG. 4 (a), (b), the partition in front is abbreviate | omitted.

  In this embodiment, as shown in FIGS. 3A and 3B, two partition walls constituting the cell forming partition wall portion are provided between the partition walls disposed as the inter-substrate gap securing partition wall portion. The partition walls 4 are formed corresponding to (1) a plurality of cells 7 (in this example, 3 × 3 = 9 cells 7 as shown in FIG. 3C when the panel is viewed from above). A partition portion 4-1 for securing a gap between substrates for maintaining a gap between substrates of the information display panel, and (2) a partition portion for securing a gap between substrates. 4-1 is formed in a portion other than 4-1 and has a gap 8 or white particle 3 Wa between the substrates 1 and 2, and a cell-forming partition wall portion 4-2 for forming each cell 7 of the information display panel. It is composed. Further, in the present embodiment, the inter-substrate gap securing partition wall portion 4-1 is formed on the substrate 2 at a height corresponding to the desired inter-substrate gap, and the gap 8 for partitioning the other inter-substrate spaces into the cells 7 is formed. Alternatively, the height of both the partition walls 4-2-1 and 4-2-2 is adjusted so that the cell-forming partition wall part 4-2 having the white particles 3 Wa overlaps with both the substrates 1 and 2. The length is less than the height of the inter-substrate gap securing partition wall portion 4-1, so that the inter-substrate gap securing partition wall portion 4-1 and the rear substrate 1 and the partition wall 4-2 are formed. 1 and the partition wall 4-2, the adhesive 9 is disposed, and the partition wall portion 4-1 for securing the inter-substrate gap and the other substrate 1 are bonded and bonded together. In this example, the white particles 3 </ b> W sandwiched between the partition 4-2-1 and the partition 4-2-2 constituting the cell forming partition part 4-2 are fixed by the adhesive 9. In this example, the height of the partition 4-2-1 and 4-2-2 constituting the opposing cell-forming partition part 4-2 is the same as that of the partition 4-2-1 provided on the substrate 1 on the back side. The gap 8 is shortened so that the gap 8 is located near the center near the back side of the panel. By doing in this way, even when a particle is sandwiched and fixed in the gap 8, it is difficult to see the trapped particle from the display surface side, which is preferable in terms of display properties.

  Next, an example of the manufacturing method of the information display panel of this invention is demonstrated based on Fig.4 (a)-(e) and Fig.5 (a)-(c).

  An example of the manufacturing method will be described in accordance with the example shown in FIGS. 4A to 4E. First, before the steps of FIGS. 4A to 4E are performed, a particle group serving as a display medium is filled. A cell forming partition wall portion 4-2 and an inter-substrate gap securing partition wall portion 4-1 are formed on the other substrate. The cell forming partition wall portion 4-2 is configured such that a facing gap 8 is formed between the tops of the partition walls 4-2-1 and 4-2-2 when facing each other. Next, as shown in FIG. 4A, an example is shown in FIG. 5A on a panel substrate 2 having a partition wall 4-2-2 and a partition portion 4-1 for securing an inter-substrate gap higher than that. As shown in FIG. 5C, a mask 11 having an opening 12 having a structure for masking the top portion of the inter-substrate gap securing partition is disposed as shown in FIG. The first display medium (in this example, the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa) is dropped, and the partition 4-2-2 corresponding to the opening 12 of the mask 11 and The white display medium 3W is disposed in the cell 7 on the panel substrate 2 partitioned by the partition wall portion 4-1 for securing the inter-substrate gap. Subsequently, as shown in FIG. 4B, the second display medium (in this example, the black display medium 3B configured as a particle group including the positively charged black particles 3Ba) is dropped from above the mask 11, It arrange | positions on the white display medium 3W already arrange | positioned.

  In filling the particle group constituting the display medium, since there is no mask portion of the mask 11 on the opening of the cell 7, the particle group is uniformly filled in the cell 7, and the variation for each cell 7 varies. Absent. In particular, the above effect is enhanced when there is not much difference between the particle diameter and the cell opening such that the maximum diagonal distance of the opening of the cell 7 is about 100 μm. Further, as shown in FIG. 4 (b), even when particles are adhered on the partition wall 4-2-2 constituting the cell-forming partition wall portion 4-2, as described later, an adhesive is used at the time of bonding the panels. Can be bonded together with a predetermined gap between the substrates.

  Next, as shown in FIG. 4C, the mask 11 is removed, and the adhesive 9 for laminating the panel substrates is disposed on the inter-substrate gap securing partition wall portion 4-1. Then, as shown in FIG. 4D, the adhesive 9 is also thickened on the top of the cell 4-2-1 that constitutes the cell forming partition part 4-2 on the substrate 1 side that is not filled with the display medium. Even if the black particles 3Ba remain on the partition wall 4-2-2, the substrates 1 and 2 are bonded together in the state of 1 μm to D0 / 2. As a result, as shown in FIG. 4E, there is a partial state in which particles are sandwiched between the barrier ribs 4-2-1 and 4-2-2 constituting the barrier rib portion 4-2 for cell formation. Thus, an information display panel having a cell-forming partition wall portion 4-2 having a gap 8 is produced. A gap 8 of D0 ≦ D1 ≦ 1.5 × D0 (D1 is a gap interval and D0 is an average particle diameter) is formed in a portion where no particles remain on the partition wall 4-2-2.

  Hereinafter, materials and the like of each member constituting the information display panel of the present invention will be described in more detail.

A panel arranged on the top of the partition for securing the gap between substrates formed on one panel substrate and on the top of the partition for forming a cell formed on the panel substrate on which the partition for securing the gap between the other substrates is not formed. The substrate bonding adhesive is disposed on the top of each partition wall with a thickness in the range of 1 μm to D0 / 2 (D0 is the average particle diameter of the particle group used as the display medium).
As the adhesive, an acrylic adhesive mainly composed of an acrylic resin, a methacrylic resin or a mixture thereof, or an epoxy adhesive mainly composed of an epoxy resin is suitable, but other general-purpose adhesives are used. You can also.
The adhesive disposed on the top of the partition for securing the gap between the substrates preferably has excellent bonding strength in order to hold the bonded portion of the bonded panel structure, and the thickness as the adhesive layer to be disposed is as described above. It is not necessary to limit to 1 μm to D0 / 2, and the adhesive is disposed with an appropriate thickness considering the bonding strength.

  A dry film resist is suitably used as a material for forming the inter-substrate gap securing partition 4-1 and the cell forming partition 4-2. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used.

  After laminating a dry film resist having a thickness corresponding to the desired partition wall height on the substrate on which the inter-substrate gap securing partition part 4-1 and the cell formation partition part 4-2 are formed, unnecessary portions are formed by photolithography. A partition wall portion is formed by removing. The partition wall portion 4-1 for securing the inter-substrate gap and the partition wall portion 4-2 for cell formation are laminated with the same dry film resist, and both the partition walls 4-2-1 and 4-2-2 are formed with the same material configuration. The barrier ribs 4 may be formed by using different dry film resists to form the respective barrier rib portions, or to form the barrier rib portions 4-2 for forming cells facing both panel substrates. 2-1 and 4-2-2 can also be formed using different dry film resists. When the cells and the pixels are associated with each other, the cell arrangement is a lattice matrix arrangement.

  The cell arrangement composed of the inter-substrate gap securing partition part 4-1 and the cell-forming partition part 4-2 provided for securing the inter-substrate gap includes a lattice shape, a honeycomb shape, a mesh shape, and the like. The cross-sectional shape of the cell may be a polygon such as a quadrangle, a triangle, or a hexagon, a circle, an ellipse, a racetrack, or the like, or a combination of a plurality of shapes. From the point that the aperture ratio of the display unit can be increased, a quadrangle or hexagon is preferable, and from the point that particles constituting the display medium can be easily moved, a shape having a curve is preferable. From the two points, a square with rounded corners and a hexagon with each round are preferably used.

  As the mask 11, a metal mask using a metal such as stainless steel (SUS304, etc.), aluminum, iron, copper, etc., a resin mask using a general-purpose plastic, a laminated mask combining a metal and a resin, or the like is used. . An insulating member is provided on a part of the metal mask to form a conductive metal mask having a partially insulating portion, or a conductive mask is provided on a part of a resin mask to form a conductive mask having a partially conductive member. Can be.

  When an electrode is provided on the substrate, as an electrode material of the electrode disposed to face the transparent electrode provided on the transparent substrate side, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum doped Examples thereof include transparent conductive metal oxides such as zinc oxide (AZO), antimony tin 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 side, 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 also be suitably used. The display surface side electrode thickness is preferably 0.01 to 10 [mu] m, more preferably 0.05 to 5 [mu] m, as long as electrical conductivity can be secured and light transmittance is not hindered. Moreover, the back side electrode thickness should just ensure electroconductivity, 0.01-10 micrometers is preferable and 0.05-5 micrometers is more preferable.

  Since a transparent conductive material suitable as a display surface side electrode is less flexible than a metal material, it is preferably used in combination with a thin 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 display visibility is not hindered. 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.

  The information display panel 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 and a handy terminal, an electronic paper such as an electronic book and an electronic newspaper. , Billboards such as signboards, posters, blackboards (whiteboards), electronic desk calculators, display units for home appliances, automotive products, card display units such as point cards, IC cards, electronic advertisements, information boards, electronic POPs (Point Of) Presence, Point Of Purchase advertising), electronic price tag, electronic shelf label, electronic score, display part of RF-ID equipment, as well as other electronic equipment display parts such as POS terminals, car navigation devices, watches, etc. Can be electrically driven using a display unit (rewritable paper) that rewrites the display by connecting to external rewriting means, external electric field forming means, etc. It is also suitably used as a display unit (rewritable paper) that performs display rewriting by electrically driving a display medium configured as a particle group including active particles.

  For the display medium used in the information display panel of the present invention, the electric drive such as the particle group including the chargeable particle, the particle group including the conductive particle, the particle group including the semiconductor particle, which has been described so far, can be performed. Particle groups containing possible particles can be used. As for the driving method of the information display panel of the present invention, a simple matrix driving method and a static driving method which do not use a switching element in the panel itself, a three-terminal switching element represented by a thin film transistor (TFT) or a thin film diode (TFD). An active matrix driving method using a two-terminal switching element represented by, and various types of driving methods can be applied.

(A)-(c) is a figure which shows the structure of an example of the information display panel of this invention, respectively. (A)-(c) is a figure which shows the structure of the other example of the information display panel of this invention, respectively. (A)-(c) is a figure which shows the structure of the further another example of the information display panel of this invention, respectively. (A)-(e) is a figure for demonstrating an example of the manufacturing method of the information display panel of this invention, respectively. (A)-(c) is a figure for demonstrating the relationship between the mask suitably used when manufacturing the information display panel of this invention, and a partition, respectively. (A)-(e) is a figure for demonstrating an example of the method of manufacturing the conventional information display panel using the conventional flat mask. (A)-(c) is a figure for demonstrating the other example of the method of manufacturing the conventional information display panel, respectively using the conventional flat mask. (A)-(d) is a figure for demonstrating the problem in the manufacturing method of the conventional information display panel shown to Fig.6 (a)-(e), respectively. (A)-(d) is a figure for demonstrating the problem in the manufacturing method of the conventional information display panel shown to Fig.7 (a)-(c), respectively.

Explanation of symbols

1, 2 substrate 3W white display medium (white particles)
3Wa White particles 3B Black display medium (Black particles group)
3Ba Black particles 4-1 Separation part for securing gap between substrates 4-2 Separation part for cell formation 4-2-1, 4-2-2 Part constituting cell formation partition part 5, 6 Electrode 7 Cell 9 Adhesive 11 Mask 12 Mask opening

Claims (5)

At least one of the substrates is transparent, and the partition wall portion for partitioning the space between the substrates is provided with one substrate formed with a partition wall portion that serves to ensure a predetermined gap between the substrates and partition the space between the substrates. A plurality of cells partitioned by partition walls of a panel structure in which the other substrate formed is bonded with a predetermined inter-substrate gap, and containing electrically reflective particles having optical reflectivity. An information display panel that arranges a display medium configured as a particle group and electrically drives the display medium to display information such as an image,
Particles that are formed separately on both the substrates and that form a group of particles that are used as a display medium having a gap D1 opposed to each other with a gap D1 exclusively for partitioning the space between the substrates. Is an information display panel characterized by satisfying D0 ≦ D1 ≦ 1.5 × D0.   Formed separately on both of the substrates, a partition portion that exclusively serves to partition the space between the substrates and to partition the space between the substrates among the partition portions for partitioning the space between the substrates exclusively. 2. An adhesive layer having a thickness of 1 μm to D0 / 2 is formed in a partition wall portion for partitioning a space between the substrates exclusively formed on the substrate that is not the formed substrate. 2. The information display panel according to 1.   3. The gap D <b> 1 formed when the partition wall portions for partitioning the space between the substrates are arranged opposite to each other are located in the vicinity of the center in the inter-substrate gap. 4. Information display panel.   3. The gap D <b> 1 formed when the partition wall portions for partitioning the space between the substrates are disposed so as to face each other is in a position close to the back side substrate in the inter-substrate gap. The information display panel described. At least one of the substrates is transparent, and the partition wall portion for partitioning the space between the substrates is provided with one substrate formed with a partition wall portion that serves to ensure a predetermined gap between the substrates and partition the space between the substrates. A plurality of cells partitioned by partition walls of a panel structure in which the other substrate formed is bonded with a predetermined inter-substrate gap, and containing electrically reflective particles having optical reflectivity. A method of manufacturing an information display panel in which a display medium configured as a particle group is arranged and the display medium is electrically driven to display information such as an image,
A display medium is filled in a cell on a substrate formed with a partition wall portion that serves to secure a predetermined gap between the two substrates and to partition a space between the substrates, and is formed on the substrate. Adhesive is applied to the top of the partition wall portion that serves to ensure a predetermined gap between the substrates and partition the space between the substrates, and to the top of the partition wall portion for exclusively partitioning the space between the substrates formed on the other substrate. The method for manufacturing an information display panel according to any one of claims 1 to 4, wherein the panel is formed by arranging and bonding two substrates together.

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