JP2010145740A - Information display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information display panel capable of making a panel narrower in frame even when connection terminals of leading lines to connect electrodes of each panel substrate to a drive circuit side are brought together on one edge or two opposing edges of one panel substrate. <P>SOLUTION: The display panel has a structure formed by successively stacking and laminating a first substrate 12, a second substrate 11 and an L-shaped flexible cable 24 in such a manner that a transparent stripe electrode of the first substrate and a transparent stripe electrode of the second substrate are perpendicularly opposing to each other, at least two types of display media composed of particle groups containing chargeable particles are encapsulated in an information display screen area in the space between the first substrate and the second substrate, and a line electrode led from the stripe electrode of the first substrate is electrically connected to the L-shaped flexible cable; and the panel is configured to display information by moving the display media by an electric field generated by applying a voltage controlled by the drive circuit to an electrode pair composed of the opposing stripe electrodes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention seals two types of display media different in color and charging polarity, which are configured as a particle group including a chargeable particle, in a plurality of cells provided between an observation side panel substrate and a back side panel substrate. Then, these two types of display media are driven to be inverted by an electric field formed by applying a voltage to a counter electrode formed by opposing the electrodes provided on the two panel substrates to display information such as an image. The present invention relates to an information display panel.

  Conventionally, a display medium is encapsulated between a transparent front substrate and a back substrate that does not need to be transparent, a voltage is applied between electrodes provided on each substrate, and an electric field is applied to the display medium. In the information display panel for displaying information such as images by moving the first stripe electrode made of a transparent inorganic conductive film provided at least in the display area of the front substrate; provided in at least the display area of the back substrate A second stripe electrode made of a metal film and provided substantially orthogonally to the first stripe electrode; and made of a metal film provided outside the display area of the rear substrate and connected to the second stripe electrode And a first lead line made of a metal film and connected to the first stripe electrode and provided outside the display area of the rear substrate. Information display panel, wherein it is known to be (for example, see Patent Document 1).

  11A to 11C are diagrams for explaining an example of the conventional information display panel described above. First, as shown in FIG. 11A, an inorganic conductive film such as transparent indium tin oxide (ITO) is provided at a position corresponding to at least the information display screen region 52 of the observation side substrate 51 made of a transparent film substrate or the like. The first stripe electrode 53 made of is formed by patterning. Next, as shown in FIG. 11B, the second stripe electrode 55, the second lead line 56, and the first lead line 57 are all formed of a metal film on the back side substrate 54. Are formed by patterning.

  At this time, when the observation-side substrate 51 and the back-side substrate 54 are overlapped with each other at a position corresponding to at least the information display screen area 52 on the back-side substrate 54, the second stripe electrode 55 is the first stripe electrode. 53 is formed so as to be substantially orthogonal. Further, the second lead line 56 is connected to the second stripe electrode 55 at a position outside the information display screen area 52 on the back side substrate 54 and is connected to one end surface of the panel (TCP: Tape Carrier Package mounting portion). To be formed). Further, the first lead line 57 is connected to the end of the first stripe electrode 53 when the observation side substrate 51 and the back side substrate 54 are overlapped at a position outside the information display screen area 52 of the back side substrate 54. And the end portion of the first lead wire 57 are formed from one end surface of the panel so as to overlap vertically.

  Finally, as shown in FIG. 11 (c), an anisotropic conductive connecting material 58 (here an anisotropic conductive sealant) containing conductive particles and having anisotropic conductivity is disposed on the outer periphery of the information display screen region 52. So as to surround the information display screen area 52, and the end of the first stripe electrode 53 and the end of the first lead line 57 overlap each other (a part of the drawing is marked with a circle). In this state, the information display panel is obtained by bonding the observation side substrate 51 and the back side substrate 54 together. Here, the anisotropic conductive sealant is used to establish conduction, but an adhesive that bonds two substrates can also have the function.

JP 2007-322805 A

  In the conventional information display panel described above, the connection terminals of the lead lines for connecting the electrodes of each panel substrate to the drive circuit are gathered on one side of one panel substrate, and this connection terminal, the drive circuit, If the configuration is to be connected, a lead line is formed by bending the lead line of the other panel substrate to 90 degrees, and the area becomes a so-called frame that cannot display information, and the panel The area that can be used as a display screen was narrow on the entire surface.

  Also, a technology for directly mounting a driving IC chip (COG: mounting an IC chip on a glass substrate, COF: IC chip) when connecting the connection terminals collected on one side of one panel substrate and the driving circuit. Is mounted on a film substrate, COP: IC chip is mounted on a plastic substrate), or a flexible cable substrate on which the driving IC chip is TAB mounted is used, the driving IC chip or the driving IC chip is TAB. Since a plurality of mounted flexible cable substrates have to be connected in a row, the use of a panel substrate having one side longer than the arranged length also leads to an increase in the frame.

  The present invention solves the above-described problems, and the connection terminals of the lead lines for connecting the electrodes of each panel substrate to the drive circuit are collected on one side of one panel substrate or on two opposite sides. However, the present invention intends to provide an information display panel that can achieve a narrow frame of the panel.

  An information display panel according to the present invention includes a first substrate in which a transparent stripe electrode is formed in an information display screen area, and a line electrode drawn from the stripe electrode is formed in an area other than the information display screen area, A film-like second substrate in which stripe electrodes are formed in the display screen area and line electrodes drawn from the stripe electrodes are formed in areas other than the information display screen area, and line shapes for connection wiring to the drive circuit In a dot matrix type information display panel constituted by an L-shaped flexible cable having electrodes formed thereon, the transparent stripe electrode of the first substrate and the stripe electrode of the second substrate are orthogonally opposed, and At least a display medium configured as a group of particles containing chargeable particles in the information display screen area in the space between the first substrate and the second substrate. Two types of sealing are performed, and the line-shaped electrode drawn from the stripe electrode of the first substrate and the L-shaped flexible cable are electrically connected to each other, so that the first substrate, the second substrate, L As a structure in which the U-shaped flexible cables are stacked in order, information is imaged by moving the display medium with an electric field generated by applying a voltage controlled by a drive circuit to an electrode pair formed by opposing stripe electrodes. It is characterized by being configured to display.

  As a preferred example of the information display panel of the present invention, means for electrically connecting the line-shaped electrode drawn from the stripe electrode of the first substrate and the L-shaped flexible cable is conductive particles. The number of line-shaped electrodes formed on the L-shaped flexible cable is in the middle of connection with the drive circuit side or on the drive circuit side. A plurality of the L-shaped flexible cables are arranged in accordance with the number of stripe electrodes formed on the transparent first substrate, and the number is equal to or less than the number of output side terminals of one driving IC arranged as a part of The thickness of the film-like second substrate is 25 μm to 200 μm, and the line-shaped electrode for connecting wiring to the drive circuit of the L-shaped flexible cable On one side of the panel from which the line-shaped electrode drawn out from the stripe electrode of the second substrate is drawn, or 1 of the panel from which the line-shaped electrode drawn out from the stripe electrode of the second substrate is drawn Has been pulled out to the side facing the side or to both sides facing the panel.

  According to the present invention, a first substrate on which a transparent stripe electrode is formed in an information display screen area and a line electrode drawn from the stripe electrode is formed in an area other than the information display screen area, and the information display screen area A film-like second substrate on which a stripe electrode is formed and a line electrode drawn from the stripe electrode is formed in an area other than the information display screen area, and a line electrode for connection wiring to the drive circuit is formed In the dot matrix type information display panel configured by the L-shaped flexible cable, the first stripe-shaped transparent electrode of the first substrate and the stripe electrode of the second substrate are orthogonally opposed to each other, and At least two types of display media configured as a group of particles containing chargeable particles are sealed in the information display screen area in the space between the substrate and the second substrate. In addition, the first electrode, the second substrate, and the L-shaped flexible cable are electrically connected to the line-shaped electrode drawn from the stripe electrode of the first substrate and the L-shaped flexible cable. Thus, the area occupied by the line-shaped electrode drawn from the stripe electrode to the area other than the information display screen area can be reduced, and the frame portion can be reduced.

  In addition, according to the present invention, the first substrate on which the transparent stripe electrode is formed in the information display screen region and the line electrode drawn from the stripe electrode is formed in the region other than the information display screen region, and the information display A film-like second substrate in which a stripe electrode is formed in the screen region and a line electrode drawn from the stripe electrode is formed in a region other than the information display screen region, and a line electrode for connection wiring to the drive circuit In the dot matrix type information display panel constituted by the L-shaped flexible cable formed with the transparent stripe electrode of the first substrate and the stripe electrode of the second substrate orthogonally opposed to each other, and At least two types of display media configured as a particle group including a chargeable particle in an information display screen area in a space between the first substrate and the second substrate. The first substrate, the second substrate, and the L-shape are sealed and electrically connected to the line-shaped electrode drawn from the stripe electrode of the first substrate and the L-shaped flexible cable. Since the flexible cable is stacked and bonded together in this order, the line electrode drawn from the stripe electrode of the first substrate, the flexible cable mounted with the driving IC chip, and the line electrode drawn from the stripe electrode of the second substrate And the driving IC chip-mounted flexible cable are arranged in two stages rather than arranged on one side on the same substrate, so that each connection portion can be arranged with overlap, and driving By shortening the length of the connection part on which the IC chip is mounted and reducing the length of the panel board to match it, It is possible to reduce the frame portion occupied by the other information display area are.

  First, the configuration of the information display panel that is the subject of the present invention will be described. In the information display panel which is an object of the present invention, 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 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.

  An example of an information display panel that is an object of the present invention will be described with reference to FIGS. In the example shown in FIGS. 1 (a) and 1 (b), at least two types of display media having different optical reflectivity and charging characteristics (here, configured as a particle group including particles having at least optical reflectivity and chargeability) 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 a particle group including the positively charged black particles 3Ba are shown). In the cell, the substrates 1 and 2 correspond to the electric field generated by applying a voltage to the pixel electrode pair formed by the stripe electrode 6 provided on the substrate 2 and the stripe electrode 5 provided on the substrate 1 crossing each other at right angles. And move vertically. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 1A, or the black display medium 3B is visually recognized by the observer as shown in FIG. 1B. Are displayed in a matrix with black and white dots. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted. Here, the partition walls are formed so that the cells correspond to the pixels, but the partition walls can be formed regardless of the position of the pixels.

  The information display panel according to the present invention is characterized in that a transparent stripe electrode is formed in the information display screen area based on the information display panel having the above-described configuration, and is drawn from the stripe electrode in an area other than the information display screen area. A film-like second substrate in which stripe electrodes are formed in a first substrate on which line-shaped electrodes are formed, and information display screen areas, and line-shaped electrodes drawn from the stripe electrodes are formed in areas other than the information display screen areas. In the dot matrix type information display panel composed of an L-shaped flexible cable on which a line electrode for connection wiring to a drive circuit is formed, a transparent stripe electrode of the first substrate and a second substrate In the information display screen area in the space between the first substrate and the second substrate so that the stripe electrodes are orthogonally opposed to each other. At least two types of display media configured as a particle group including a child are sealed, and the line-shaped electrode drawn out from the stripe electrode of the first substrate and the L-shaped flexible cable are electrically connected. In this structure, the first substrate, the second substrate, and the L-shaped flexible cable are stacked and bonded in this order, and a voltage controlled by the drive circuit is applied to the electrode pair formed by the opposed stripe electrodes. The display medium is configured to display information by moving the display medium with an electric field.

  Hereinafter, specific examples of the information display panel of the present invention will be described with reference to the drawings.

<About the first embodiment>
FIGS. 2A to 2C are views for explaining the first embodiment of the first substrate, the second substrate and the L-shaped flexible cable constituting the information display panel of the present invention. is there. The first embodiment shown in FIGS. 2A to 2C shows an example in which the connection on the drive circuit side is performed on the same side.

  First, in the first substrate (observation side substrate) 12 shown in FIG. 2A, a transparent stripe electrode (transparent conductive film) 16 is formed in an information display screen area (area surrounded by a dotted line in the figure), It is configured as a transparent substrate in which a line electrode (conductive film) 21 drawn from the stripe electrode 16 is formed in a region other than the information display screen region. Next, in the second substrate (back substrate) 11 shown in FIG. 2B, a stripe electrode (conductive film) 15 is formed in the information display screen region, and the stripe electrode 15 is formed in a region other than the information display screen region. It is configured as a film-like substrate on which a line-like electrode (conductive film) 22 drawn out from is formed. The line-shaped electrodes 22 collected corresponding to the number of connection terminals of the driving IC are connected to the flexible cable 23 on which one side of the panel is mounted with the driving IC connected to the external driving circuit side by TAB. Yes. The thickness of the second substrate 11 is preferably as thin as possible, and the thickness of the film-like second substrate 11 is preferably 25 μm to 200 μm. Next, the L-shaped flexible cable 24 shown in FIG. 2C is a flexible cable in which an L-shaped line electrode (conductive film) 25 for connection wiring to the drive circuit side is formed. Three L-shaped flexible cables are used according to the required number of driving ICs. The electrodes 25 are formed corresponding to the number of connection terminals of the driving IC, and are connected by the flexible cable 26 to the external drive circuit side on the same side as the side where the flexible cable 23 of the second substrate is arranged. Has been. In addition, it is preferable to mount the driving IC on the flexible cables 23 and 26 by TAB mounting or COF mounting.

  In this example, the line-shaped electrode 21 drawn from the stripe electrode 16 in an area other than the information display screen area of the first substrate 12 and an area other than the information display screen area of the L-shaped flexible cable 24 and the flexible cable 26. When the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 are overlapped, the tip portion 25 -A of the electrode 25 provided in the region opposite to the side connected to , And corresponding positions, preferably arranged so as to face each other and correspond to each other. In this example, the flexible cable 23 of the second substrate and the flexible cable 26 of the L-shaped flexible cable 24 (here, TCP: Tape Carrier Package) are used for the first substrate 12 and the second substrate. The left and right lengths of the L-shaped flexible cable 24 in the figure are adjusted so that the substrates 11 and the L-shaped flexible cable 24 are alternately arranged when they are overlapped. In this respect, since the flexible cable 23 and the flexible cable 26 are provided on different substrates, even if they overlap at the same position, it is possible to connect without problems by devising a connector that connects to the flexible cable. .

  FIGS. 3A and 3B are diagrams for explaining an example of the information display panel according to the present invention. FIG. 3A is a diagram of the information display panel viewed from the observation surface side. FIG. 3B is a diagram schematically showing a cross section along the line AA in FIG. In the example shown in FIGS. 3A and 3B, each component is displayed at a ratio of dimensions different from the actual dimensions so that the features of the information display panel of the present invention can be better understood. In particular, the structural members are omitted. In the example shown in FIGS. 3A and 3B, the first board 12, the second board 11, and the L-shaped flexible cable 24 shown in FIGS. A display panel is configured.

  In the example shown in FIGS. 3A and 3B, the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 are overlapped with each other at the outer periphery of the information display screen region. A frame-shaped sealing agent 32 is provided on the outer peripheral portion of the inter-substrate gap securing partition wall 31 between the substrate 12 and the second substrate 11. Further, the display medium arranged layer 33 between the first substrate 12 and the second substrate 11 is sealed with a display medium configured as a particle group including a chargeable particle. For information display of a dot matrix display method in which an electric field is applied from an electrode pair formed by opposing and intersecting the formed transparent stripe electrode 16 and the stripe electrode 15 formed on the second substrate 11 to perform dot matrix display by passive drive. It is a panel. Note that in the example shown in FIGS. 3A and 3B, the display medium is not shown as only the display medium arrangement layer 33 is shown. The enclosure of the inter-substrate gap securing partition 31, the frame-shaped sealing agent 32, and the display medium, and further the display medium, are all encapsulated in the same manner as the configuration and the encapsulating method of the conventionally known information display panel.

  The greatest feature of the information display panel of the present invention is that the line-shaped electrode drawn from the stripe electrode 16 to the region other than the information display screen region of the first substrate 12 in the example shown in FIGS. 21 and the tip 25-A of the electrode 25 provided in a region other than the information display screen region of the L-shaped flexible cable 24 and on the side opposite to the side connected to the flexible cable 26, On the outer side of the partition wall 31 for securing the gap and the frame-shaped sealant 32, electrical connection is made by an anisotropic conductive connecting material 34 such as an anisotropic conductive film (ACF) to conduct conduction between the substrates. It is the point that went. An anisotropic conductive film (ACF) is composed of an anisotropic conductive connecting material having a configuration in which conductive particles are contained in a non-conductive resin, and the electrical connection using this is the same as a conventionally known example. It is. An anisotropic conductive paste (ACP) may be used instead of the anisotropic conductive film (ACF).

  According to the information display panel of the present invention described above, the line-shaped electrode 21 drawn from the stripe electrode 16 of the first substrate 12 and the tip 25-A of the electrode 25 of the L-shaped flexible cable 24 are different from each other. By connecting with the conductive conductive material 34, a driving voltage is applied to the stripe electrode 16 of the first substrate 12 through the electrode 25 of the L-shaped flexible cable 24, the anisotropic conductive conductive material 34, and the line electrode 21. Can be applied. In the present invention, since the above configuration can be configured only by the anisotropic conductive connecting material 34 provided in a region other than the information display screen region, a narrower frame can be achieved as compared with the conventional configuration. In addition, when the connection to the drive circuit side is performed on the same side, the flexible cable 23 and the flexible cable 26 can be formed on different surfaces, respectively, so that the flexible cable 23 and the flexible cable 26 are allowed to overlap. Can do.

<About the second embodiment>
FIGS. 4A to 4C are views for explaining a second embodiment of the first substrate, the second substrate and the L-shaped flexible cable constituting the information display panel of the present invention. is there. The second embodiment shown in FIGS. 4A to 4C shows an example in which the connection on the drive circuit side is performed on two opposite sides.

  First, in the first substrate (observation side substrate) 12 shown in FIG. 4A, a transparent stripe electrode (transparent conductive film) 16 is formed in an information display screen region (region surrounded by a dotted line in the drawing), It is configured as a transparent substrate in which a line electrode (conductive film) 21 drawn from the stripe electrode 16 is formed in a region other than the information display screen region. Next, in the second substrate (back substrate) 11 shown in FIG. 4B, a stripe electrode (conductive film) 15 is formed in the information display screen region, and the stripe electrode 15 is formed in a region other than the information display screen region. It is configured as a film-like substrate on which a line-like electrode (conductive film) 22 drawn out from is formed. The line-shaped electrodes 22 collected corresponding to the number of connection terminals of the driving IC are connected to a flexible cable 23 on which one side of the panel is mounted with the driving IC connected to the external driving circuit side. . The thickness of the second substrate 11 is preferably as thin as possible. Next, the L-shaped flexible cable 24 shown in FIG. 4C is an L-shaped flexible cable in which an L-shaped line electrode (conductive film) 25 for connection wiring to the drive circuit side is formed. Here, three pieces are used corresponding to the stripe electrodes of the first substrate. The electrode 25 is formed corresponding to the number of connection terminals of the driving IC, and is connected to the external drive circuit side and the plurality of flexible cables 26 on one side of the second substrate facing the side where the flexible cable 23 is disposed. Connected.

  In this example, the line-shaped electrode 21 drawn from the stripe electrode 16 in an area other than the information display screen area of the first substrate 12 and an area other than the information display screen area of the L-shaped flexible cable 24 and the flexible cable 26. When the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 are overlapped, the tip portion 25 -A of the electrode 25 provided in the region opposite to the side connected to , And corresponding positions, preferably arranged so as to face each other and correspond to each other.

  FIG. 5 is a diagram for explaining another example of the information display panel of the present invention. In the example shown in FIG. 5, in order to better understand the characteristics of the information display panel of the present invention, each component is displayed at a ratio of dimensions different from the actual dimensions, and the components are partially omitted. it's shown. In the example shown in FIG. 5, the information display panel is configured by superimposing the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 shown in FIGS. 4A to 4C in this order. Yes. In the example shown in FIG. 5 as well, the configuration and effect of the anisotropic conductive connecting member 34 using the L-shaped flexible cable 24, which is a feature of the information display panel of the present invention, is the same as that of the first embodiment described above. The same.

<About the third embodiment>
FIGS. 6A to 6C are views for explaining a third embodiment of the first substrate, the second substrate and the L-shaped flexible cable constituting the information display panel of the present invention. is there. The third embodiment shown in FIGS. 6A to 6C shows an example in which the connection on the drive circuit side is performed on two opposite sides.

  First, in the first substrate (observation side substrate) 12 shown in FIG. 6A, a transparent stripe electrode (transparent conductive film) 16 is formed in an information display screen area (area surrounded by a dotted line in the figure), It is configured as a transparent substrate in which a line electrode (conductive film) 21 drawn from the stripe electrode 16 is formed in a region other than the information display screen region. Next, in the second substrate (back substrate) 11 shown in FIG. 6B, a stripe electrode (conductive film) 15 is formed in the information display screen region, and the stripe electrode 15 is formed in a region other than the information display screen region. It is configured as a film-like substrate on which a line-like electrode (conductive film) 22 drawn out from is formed. The line-shaped electrodes 22 collected corresponding to the number of connection terminals of the driving IC are connected to the flexible cable 23 on which one side of the panel is mounted with the driving IC connected to the external driving circuit side by TAB. Yes. The thickness of the second substrate 11 is preferably as thin as possible. Next, the L-shaped flexible cable 24 shown in FIG. 6C is an L-shaped flexible cable in which an L-shaped line electrode (conductive film) 25 for connection wiring to the drive circuit side is formed. Here, three pieces are used corresponding to the stripe electrodes of the first substrate. The electrodes 25 are grouped for each region, and driving ICs connected to the external driving circuit side are TAB-mounted on the two sides of the side where the flexible cable 23 of the second substrate is disposed and the side opposite to the side. The plurality of flexible cables 26 are connected.

  In this example, the line-shaped electrode 21 drawn from the stripe electrode 16 in an area other than the information display screen area of the first substrate 12 and an area other than the information display screen area of the L-shaped flexible cable 24 and the flexible cable 26. When the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 are overlapped, the tip portion 25 -A of the electrode 25 provided in the region opposite to the side connected to , And corresponding positions, preferably arranged so as to face each other and correspond to each other.

  FIG. 7 is a view for explaining still another example of the information display panel of the present invention. In the example shown in FIG. 7, in order to better understand the characteristics of the information display panel of the present invention, each component is displayed at a ratio of dimensions different from the actual dimensions, and the components are partially omitted. it's shown. In the example shown in FIG. 7, the information display panel is configured by superimposing the first substrate 12, the second substrate 11, and the L-shaped flexible cable 24 shown in FIGS. 6A to 6C in this order. Yes. In the example shown in FIG. 7 as well, the configuration and effect of the anisotropic conductive connecting member 34 using the L-shaped flexible cable 24, which is a feature of the information display panel of the present invention, are the same as the example of the first embodiment described above. The same.

<Fourth embodiment>
FIGS. 8A and 8B are views for explaining a fourth embodiment of the first substrate, the second substrate and the L-shaped flexible cable constituting the information display panel of the present invention, respectively. is there. FIG. 8A shows an L-shaped flexible cable 24, and FIG. 8B shows an information display panel configured by superposing the first substrate 12 and the second substrate 11. FIG. The L-shaped flexible cable 24 of this example is four L-shaped flexible cables 24-1 to 24-4, and the flexible cables 26-1 to 26-4 on the side opposite to the anisotropic conductive connecting material (ACF) 34. As for the terminal part of the electrode 25 (not shown in the figure) connected to, the flexible cables 24-1 and 24-2 and the flexible cables 24-3 and 24-4 overlap each other. These are provided on one side on the short side of the panel and on the side facing the side where the flexible cables 23-1, 23-2 provided on the second substrate 11 are formed.

  FIGS. 9A and 9B are diagrams schematically showing end faces of the information display panel viewed from the A side and the B side in FIG. 8B, respectively. In the example shown in FIG. 9A viewed from the A side, the four driving IC-mounted flexible cables 26-1 to 26-4 mounted on the L-shaped flexible cables 24-1 to 24-4 are flexible cables. 26-1 and 26-2, and flexible cables 26-3 and 26-4 are arranged so as to overlap each other. In the example shown in FIG. 9B viewed from the B side, two driving IC-mounted flexible cables 23-1 and 23-2 mounted on the short side of the second substrate 11 are arranged in parallel. Yes.

  FIGS. 10A to 10C are diagrams for explaining other arrangement examples of the flexible cable at the end of the information display panel of the present invention other than the examples shown in FIGS. 9A and 9B, respectively. FIG. In the example shown in FIG. 10A, the flexible cables 23-1 to 23-4 and the flexible cables 26-1 to 26-3 are alternately arranged in two stages. In the example shown in FIG. 10A, the flexible cable (also referred to as TCP) that controls the driving IC is arranged in two stages, so that the width is not taken. In the example shown in FIG. 10 (b), the flexible cables 23-1 to 23-4 and the flexible cables 26-1 to 26-3 are arranged in parallel on the same side on the same surface, and arranged in two stages. ing. In the example shown in FIG. 10C, the flexible cables 23-1 to 23-4 and the flexible cable 26-3 are arranged in parallel on the same side so that the driving ICs mounted on the TCP alternately overlap. Yes.

  Next, each structural member which comprises the information display panel of this invention is demonstrated.

  The pixel formed by the counter electrode pair and the cell in which at least two kinds of display media are combined can be made to correspond or can not be made to correspond to each other. When performing color display by combining the three primary color filter and white display medium or black display medium, or when performing color display by combining the three primary color display medium and black display medium or the three primary color display medium and white display medium, It is preferable to associate the pixel with the cell.

  A cell can be formed by providing a partition between opposing substrates on which a display medium is arranged, or a cell can be formed as a microcapsule in which the display medium is sealed. In addition, an inter-substrate gap securing partition provided to secure the counter-substrate gap, and a cell-forming partition that functions to suppress movement of particles as a display medium in a direction parallel to the panel substrate are provided. In this case, the width of the inter-substrate gap securing partition wall is preferably in the range of 20 μm to 100 μm, and the width of the cell forming partition wall is preferably as narrow as possible in the range of 5 μm to 30 μm. Furthermore, the partition walls for cell formation may be lower than the height of the partition walls for securing the gap between the substrates, and the range that does not impair the function of suppressing the movement of particles as a display medium in a direction parallel to the panel substrate. To do. The cell-forming partition may be formed at the opposing position of both panel substrates, and may be configured to face each other when the substrates are overlapped. In this case, the opposing portion of the partition may or may not be bonded. Good.

  The arrangement of partition walls (partitions for securing the gap between panel substrates) and partition walls (partitions for cell formation) for partitioning the inter-substrate space into small chambers are arranged in a lattice, honeycomb, It can be reticulated. The cross-sectional shape of the cell may be any polygon such as a quadrangle, a triangle, a hexagon, a staircase octagon, a circle, an ellipse, a racetrack, or a combination of a plurality of shapes. From the viewpoint of increasing the aperture ratio of the display portion, a polygon such as a quadrangle, a hexagon, or a staircase octagon is preferable, and a shape having a curve is preferable from the viewpoint that particles constituting the display medium can be easily moved. In addition, when the pixels arranged in a matrix and the cells are made to correspond to each other, it is preferable that the partition walls are formed in a lattice shape and the cell shape is a square or a staircase octagon. From the above viewpoint, a rounded polygon such as a square with rounded corners or a stepped octagon with rounded corners is preferably used.

  A dry film resist material is suitably used as a partition material provided for securing a gap between substrates, a partition provided at a boundary between display areas for securing a gap between substrates and displaying an information image in different display colors, and a partition dedicated for cell formation. It is done. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used.

  A dry film resist material having a thickness corresponding to the height of the partition wall to be formed is laminated on the panel substrate, and patterned by a photolithography method using a photomask having a predetermined shape.

  The width of the partition wall portion for securing the inter-substrate gap is in the range of 20 μm to 100 μm, the width of the partition wall portion for forming the cell is in the range of 5 to 30 μm, and the width of the partition wall portion for forming the cell is secured to the gap between the substrates. It is preferable to make it smaller than the width of the partition wall portion for increasing the aperture ratio of the display portion.

  Among the conductive materials that are used as electrodes by patterning the conductive film, a transparent conductive film is obtained on the transparent first substrate that is the observation side substrate. Indium tin oxide (ITO), indium oxide, zinc-doped indium oxide ( Transparent conductive metal oxides such as IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, and conductive zinc oxide, and transparent conductive polymers such as polyaniline, polypyrrole, and polythiophene Is used.

  Of the conductive material used as an electrode by patterning the conductive film, the second substrate and the L-shaped flexible cable that are not arranged on the observation side include indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), Conductive metal oxides such as aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide and conductive zinc oxide, conductive polymers such as polyaniline, polypyrrole and polythiophene, gold, silver A metal such as copper, aluminum, nickel, or chromium, or an alloy containing these metals as a main component is used. The conductive film used as these electrodes may be transparent or may not be transparent.

  As a method for forming a conductive film as an electrode, a thin film or a metal foil (for example, rolled copper) may be used for the above-described materials by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, plating, or the like. A method of laminating a foil) and a method of applying a conductive agent mixed with a solvent or a synthetic resin binder. The above-mentioned material that can be patterned and is electrically conductive can be preferably used. In addition, the thickness of the transparent electrode on the observation side is preferably 0.01 to 10 μm, more preferably 0.05 to 5 μm, as long as conductivity can be secured and light transmittance is not hindered. The thickness of the electrode that is not on the observation side is only required to ensure conductivity, and is set in the range of 0.01 to 10 μm.

  A transparent conductive material suitable as an electrode provided on the observation side substrate (transparent first substrate) is less flexible than a metal material. In addition to the stripe electrode provided in the information display screen region, when the observation side electrode is a line electrode, 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 it does not hinder display visibility. Since the electrodes provided on the back side substrate (second substrate) and the L-shaped flexible cable do not need to consider light transmittance, the metal material having low electrical resistance and excellent flexibility is preferably used.

  The first substrate must be transparent, and ester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), olefin resins such as polyethylene (PE) and polypropylene (PP), polymethyl methacrylate ( A transparent polymer film or a transparent polymer sheet such as an acrylic resin such as PMMA), polycarbonate (PC), polyethersulfone (PES), or polyimide (PI) can be used. Moreover, a glass sheet can also be used.

  Since the second substrate does not require transparency, it is possible to use a polymer film or a polymer sheet made of the same material as described above and not transparent, and films made of various other materials can be used. Since the first substrate and the L-shaped flexible cable are connected using an anisotropic conductive connecting material, the distance between the first substrate and the L-shaped flexible cable is preferably shorter. It is desirable that the second substrate disposed between the L-shaped flexible cable is thin. Therefore, a film-like substrate having a thickness of 25 μm to 200 μm is suitable as the second substrate. If the thickness of the second substrate exceeds 200 μm, a problem may occur in the conduction between the substrates using the anisotropic conductive connecting material for the above reasons. If the thickness of the second substrate is less than 25 μm, the panel is manufactured. There is an inconvenience that makes it difficult to handle.

  Since the L-shaped flexible cable does not require transparency, a wide selection of materials can be suitably used, and the same materials as those used for the first substrate and the second substrate can be used. When a part of the L-shaped flexible cables is overlapped in accordance with the panel size, it is preferable to use a polymer film that does not take a thickness even when overlapped. A film-shaped substrate having a thickness of 25 μm to 200 μm is suitable as the L-shaped flexible cable when a part of the L-shaped flexible cables is used in an overlapping manner. If the thickness of the L-shaped flexible cable exceeds 200 μm, the stacked thickness will increase for the above reasons, and problems may occur in the connection part where conduction between substrates is performed using anisotropic conductive connection material. If the thickness of the mold flexible cable is less than 25 μm, there is a disadvantage that it is difficult to handle at the time of manufacturing the panel.

  Conductive connection materials include anisotropic conductive films (ACF) in which conductive particles are dispersed in a non-conductive thermosetting resin and formed into a film, or non-conductive without forming into a film. An anisotropic conductive paste (ACP) in which conductive particles are dispersed in a conductive thermosetting resin to form a paste is preferably used. As the conductive particles, a spherical resin having an average particle diameter of about 3 to 5 μm with nickel or gold plated, or a spherical resin having an average particle diameter of about 3 to 5 μm coated with a conductive material is used. It is done. In addition, when producing bumps on the connection parts of the first substrate or the L-shaped flexible cable, a non-conductive film (NCF) containing no conductive particles or a non-conductive paste (Non Conductive) Paste: NCP) can also be used.

  Hereinafter, an actual example will be described. In Examples 1 to 6 below, the electrodes patterned in the L-shaped stripe formed on the L-shaped flexible cable are all connected to the drive circuit side provided on the L-shaped flexible cable with the same one side. In addition, a display panel having the structure shown in FIG. 3 is formed on the same side as the connection terminal portion on the drive circuit side provided on the second substrate.

<Example 1>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent polyethylene terephthalate (PET) resin substrate having a thickness of 125 μm was produced as a first substrate. PET having a thickness of 125 μm in which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction perpendicular to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 125 μm A substrate (second substrate) was produced. The electrode of the second substrate is a flexible cable (TCP) on which a driver IC (driving IC) is mounted using an anisotropic conductive film (ACF) containing conductive particles having a diameter of 5 μm at the outer portion of the information display screen area. Also electrically connected). By etching a polyimide film laminated with a copper foil as an L-shaped flexible cable, a copper electrode patterned into an L-shaped stripe according to an L-shaped film having a thickness of 125 μm was produced. Three L-shaped flexible cables are used so that the number of electrode lines of the first substrate can be matched with the driver IC mounted on the flexible cable, and the electrodes of the first substrate and the three L-shaped flexible cables are used. The cable was electrically connected using the same ACF as described above outside the information display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. A TCP with a driver IC connected to the second substrate and the L-shaped flexible cable was connected to the drive circuit side using a connector, and a test image was displayed on the information display panel. As a result, both vertical and horizontal display could be performed satisfactorily without disconnection or leakage.

<Example 2>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent PET resin substrate having a thickness of 125 μm was produced as a first substrate. PET having a thickness of 125 μm in which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction perpendicular to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 125 μm A substrate (second substrate) was produced. The electrode of the second substrate was electrically connected to the TCP on which the driver IC was mounted using ACF in the outer portion of the information display screen area. As an L-shaped flexible cable, an aluminum electrode formed in a stripe shape in accordance with an L-shaped transparent PET film having a thickness of 125 μm was prepared. As this L-shaped flexible cable, three sheets are used so that the number of electrode lines of the first substrate can be matched with the driver IC mounted on the flexible cable, and the electrodes of the first substrate and the three L-shaped cables are used. The flexible cable was electrically connected using an ACF outside the information display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. A TCP with a driver IC connected to the second substrate and the L-shaped flexible cable was connected to the drive circuit side using a connector, and a test image was displayed on the information display panel. As a result, both vertical and horizontal display could be performed satisfactorily without disconnection or leakage. The same ACF as in Example 1 was used.

<Example 3>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent PET resin substrate having a thickness of 250 μm was prepared as a first substrate. PET having a thickness of 200 μm on which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction perpendicular to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 250 μm A substrate (second substrate) was produced. The electrode on the second substrate was electrically connected to the TCP on which the driver IC was mounted using the same ACF as in Example 1 at the outer portion of the information display screen area. As an L-shaped flexible cable, a copper electrode laminated in a copper foil patterned with a stripe shape was prepared by etching a polyimide film having a thickness of 50 μm. In this L-shaped flexible cable, two sheets are used so that the number of electrode lines of the first substrate can be matched with the driver IC. The first substrate electrode and the two L-shaped flexible cables are information Electrical connection was made using the same ACF as described above outside the display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. A TCP with a driver IC connected to the second substrate and the L-shaped flexible cable was connected to the drive circuit side using a connector, and a test image was displayed on the information display panel. As a result, both vertical and horizontal display could be performed satisfactorily without disconnection or leakage. The same ACF as in Example 1 was used.

<Example 4>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent PET resin substrate having a thickness of 250 μm was prepared as a first substrate. PET having a thickness of 25 μm on which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction orthogonal to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 250 μm A substrate (second substrate) was produced. The electrode on the second substrate was electrically connected to the TCP on which the driver IC was mounted using the same ACF as in Example 1 at the outer portion of the information display screen area. As an L-shaped flexible cable, a copper electrode laminated in a copper foil patterned with a stripe shape was prepared by etching a polyimide film having a thickness of 50 μm. In this L-shaped flexible cable, four sheets are used so that the number of electrode lines of the first substrate can be matched with the driver IC mounted on the flexible cable. The first substrate electrode and the four L-shaped cables are used. The flexible cable was electrically connected using the same ACF as described above outside the information display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. A TCP with a driver IC connected to the second substrate and the L-shaped flexible cable was connected to the drive circuit side using a connector, and a test image was displayed on the information display panel. As a result, both vertical and horizontal display could be performed satisfactorily without disconnection or leakage. The same ACF as in Example 1 was used.

<Example 5>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent PET resin substrate having a thickness of 250 μm was prepared as a first substrate. PET having a thickness of 250 μm on which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction perpendicular to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 250 μm A substrate (second substrate) was produced. The electrode of the second substrate was electrically connected to the TCP on which the driver IC was mounted using ACF in the outer portion of the information display screen area. As an L-shaped flexible cable, an aluminum electrode formed in a stripe shape in accordance with a 250 μm L-shaped transparent PET film was prepared. As this L-shaped flexible cable, three sheets are used so that the number of electrode lines of the first substrate can be matched with the driver IC mounted on the flexible cable, and the electrodes of the first substrate and the three L-shaped cables are used. The flexible cable was electrically connected using an ACF outside the information display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. A TCP with a driver IC connected to the second substrate and the L-shaped flexible cable was connected to the drive circuit side using a connector, and a test image was displayed on the information display panel. The same ACF as in Example 1 was used. There are some lines that do not work on this panel. When the panel with this defect was observed in detail, one of the ACF connections between the electrode on the first substrate and the aluminum electrode on the L-shaped flexible cable was found. Connection failure was found in the part. The cause was that the L-shaped flexible cable was bent and ACF connection was made, but since the film of this L-shaped flexible cable was a PET film of 250 μm, the elastic return force worked strongly on the ACF connection. It is done.

<Example 6>
A transparent electrode-formed film using ITO (tin-doped indium oxide) formed in a stripe shape on a transparent PET resin substrate having a thickness of 125 μm was produced as a first substrate. PET having a thickness of 125 μm in which electrodes made of ITO (tin-doped indium oxide) are formed in a stripe shape in a direction perpendicular to the stripe-shaped electrode formed on a transparent PET resin substrate (first substrate) having a thickness of 125 μm A substrate (second substrate) was produced. The electrode of the second substrate uses an anisotropic conductive film (ACF) containing conductive particles having a diameter of 5 μm at the outer portion of the information display screen area, and is electrically connected to a flexible cable (also referred to as TCP) on which a driver IC is mounted. Connected. As an L-shaped flexible cable, a 75 μm-thick polyimide film laminated with a copper foil was etched to prepare a copper electrode patterned in an L-shaped stripe according to the L-shaped film. In this L-shaped flexible cable, three pieces are used so that the number of electrode lines of the first board can be matched with the driver IC mounted on the flexible cable, and the electrodes on the first board and the three L-shaped pieces are used. The flexible cable was electrically connected using the same ACF as described above outside the information display screen area. In addition, at the tip of the part on the opposite side of the part connected to the first substrate of the electrode produced on the L-shaped flexible cable, the TCP and the driver IC are mounted using the same ACF as described above. Connected to. Here, the driver mounting side of the L-shaped flexible cable is set to a side 180 degrees different from the case of the first embodiment, and a TCP with a driver IC connected to the second board and the L-shaped flexible cable is connected to the driving circuit side. And a test image was displayed on the information display panel. As a result, both vertical and horizontal display could be performed satisfactorily without disconnection or leakage.

  Information display panels subject to the present invention include display devices for mobile devices such as notebook computers, PDAs, mobile phones, handy terminals, electronic papers such as electronic books, electronic newspapers, and electronic manuals (instruction manuals), signboards, Poster, blackboard and other bulletin boards, calculators, home appliances, automotive parts display, point card, IC card display, electronic advertising, electronic point of purchase (POP), electronic price tag, electronic It is suitably used as a display unit (so-called rewritable paper) that performs display rewriting by connecting to a shelf label, electronic score, display unit of an RF-ID device, or external display rewriting means.

(A), (b) is a figure for demonstrating an example of the information display panel used as the object of this invention, respectively. (A)-(c) is a figure for demonstrating 1st Embodiment of the 1st board | substrate which comprises the information display panel of this invention, a 2nd board | substrate, and an L-shaped flexible cable, respectively. (A), (b) is a figure for demonstrating an example of the information display panel of this invention, respectively. (A)-(c) is a figure for demonstrating 2nd Embodiment of the 1st board | substrate which comprises the information display panel of this invention, a 2nd board | substrate, and an L-shaped flexible cable, respectively. It is a figure for demonstrating the other example of the information display panel of this invention. (A)-(c) is a figure for demonstrating 3rd Embodiment of the 1st board | substrate which comprises the information display panel of this invention, a 2nd board | substrate, and an L-shaped flexible cable, respectively. It is a figure for demonstrating the further another example of the information display panel of this invention. (A), (b) is a figure for demonstrating 4th Embodiment of the 1st board | substrate which comprises the information display panel of this invention, a 2nd board | substrate, and an L-shaped flexible cable, respectively. (A), (b) is a figure which shows typically the end surface of the information display panel seen from the A side and B side, respectively in FIG.8 (b). (A)-(c) is a figure for demonstrating the other example of arrangement | positioning of the flexible cable in the edge part of the information display panel of this invention other than the example shown to Fig.9 (a), (b), respectively. It is. (A)-(c) is a figure for demonstrating an example of the conventional information display panel, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Substrate 3W White display medium 3Wa White negatively charged particle 3B Black display medium 3Ba Black positively charged particle 4 Partition 5, 6 Electrode 11 Second substrate 12 First substrate 15, 16 Striped electrode 21, 22 lines Electrode 23, 23-1, 23-2, 23-3, 23-4 flexible cable 24, 24-1, 24-2, 24-3, 24-4 L-shaped flexible cable 26, 26-1, 26 -2, 26-3, 26-4 Flexible cable 25 Electrode 25-A Tip 31 Separating gap between substrates 32 Frame sealant 33 Display medium arrangement layer 34 Anisotropic conductive connecting material

Claims (5)

  A first substrate having a transparent stripe electrode formed in the information display screen area and a line electrode drawn from the stripe electrode in an area other than the information display screen area, and a stripe electrode formed in the information display screen area A film-shaped second substrate in which line-shaped electrodes drawn from the stripe electrodes are formed in areas other than the information display screen area, and an L-shaped flexible film in which line-shaped electrodes for connection wiring to the drive circuit are formed In a dot matrix type information display panel configured by a cable, the first substrate and the second substrate are formed such that the transparent stripe electrode of the first substrate and the stripe electrode of the second substrate are orthogonally opposed to each other. And at least two types of display media configured as a particle group including a chargeable particle are sealed in an information display screen area in a space opposite to The line-shaped electrode drawn from the stripe electrode of the substrate and the L-shaped flexible cable are electrically connected, and the first substrate, the second substrate, and the L-shaped flexible cable are stacked in this order. In the above structure, the display medium is moved to display an image of information by an electric field generated by applying a voltage controlled by a drive circuit to an electrode pair formed by opposing stripe electrodes. An information display panel.   An anisotropic conductive connection in which the means for electrically connecting the line-shaped electrode drawn from the stripe electrode of the first substrate and the L-shaped flexible cable includes conductive particles contained in a non-conductive resin The information display panel according to claim 1, wherein the information display panel is a material.   The number of line-shaped electrodes formed on the L-shaped flexible cable is within the number of output-side terminals of one driving IC arranged in the middle of connection to the driving circuit side or as part of the driving circuit side. 3. The information display device according to claim 1, wherein a plurality of the L-shaped flexible cables are used in accordance with the number of stripe electrodes formed on the transparent first substrate. panel.   4. The information display panel according to claim 1, wherein a thickness of the film-like second substrate is 25 μm to 200 μm. 5.   A line-like electrode for connection wiring to the drive circuit of the L-shaped flexible cable is connected to one side of the panel from which the line-like electrode drawn from the stripe electrode of the second substrate is drawn, or the second electrode The line-like electrode drawn out from the stripe electrode of the substrate is drawn out to a side opposite to one side of the panel from which the line-like electrode is drawn out, or to both opposite sides of the panel. The information display panel according to item 1.

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