JP2011013254A - Information display medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display medium displaying two colors in accordance with a potential applied to an electrode, in which the cost for solid display is decreased when electrodes are formed by printing using a conductive paste.SOLUTION: The display medium includes an information display layer 20 that displays a black or a white color in accordance with a potential applied, and electrodes 12a to 12n and 13 for applying a potential to the information display layer 20. The information display layer 20 displays a color of black or white in accordance with a potential applied to the corresponding electrode in the regions opposing to the electrodes 12a to 12n and 13, includes a blurring region along the circumferences of the regions opposing to the electrodes 12a to 12n and 13, having a given width for displaying a color of black or white in accordance with the potential applied to the corresponding electrode, and displays a solid color of black or white in a solid display part 3. The electrode 13 disposed in the solid display part 3 is divided into a plurality of segments by grooves 14 having a width twice that of the blurring region.

Description

  The present invention relates to an information display medium that displays information by an electric potential applied to an electrode, and more particularly to a technique for reducing cost in an information display medium having a solid display area.

  Conventionally, as a display device for displaying information, a CRT display, a liquid crystal display, a plasma display, and the like are used. These are used in a television receiver to display a television image transmitted from a television station or a personal computer. It is possible to display information stored in a personal computer or information distributed via the Internet. Each of these display devices has advantages and disadvantages. For example, a CRT display has a wide viewing angle but a large depth size, and a liquid crystal display has a thin depth size but a narrow viewing angle, and a plasma display. Has a large viewing angle and a small depth size, but consumes a lot of power.

  In recent years, in addition to the display devices described above, an electronic display called electronic paper that displays digital information on a thin display medium such as paper has begun to spread. In electronic paper, a substance whose state changes depending on the potential applied to the two electrodes is interposed between two electrodes facing each other, and the state of the substance is changed by generating a potential difference between the two electrodes. Information is displayed using the change of the substance (see, for example, Patent Document 1). Since such electronic paper is thin like paper, it is easy to carry, consumes less power, has a wide viewing angle, and can rewrite information displayed by the potential applied to the electrodes. Since the display contents can be retained even when the power is turned off, further spread in the future is expected.

  11A and 11B are diagrams showing an example of the structure of a general electronic display, in which FIG. 11A is a front view, FIG. 11B is a cross-sectional view taken along line AA ′ shown in FIG. 11A, and FIG. (D) is the A section enlarged view shown in (b).

  As shown in FIG. 11, a general electronic display is configured such that an information display layer 720 for displaying information is sandwiched between a wiring electrode layer 710 and a transparent conductive film substrate 730.

  The transparent conductive film substrate 730 is configured by forming a transparent electrode (for example, ITO: Indium Tin Oxide) 732 on one surface of a transparent substrate 731 made of glass or the like, and the information display layer 720 includes a seal layer. A partition wall liquid 722 in which the chargeable particles 723 are dispersed is housed in a region surrounded by the partition wall 724 and the partition wall 721.

  The wiring electrode layer 710 displays on the base substrate 711 one color solidly on electrodes 712a to 712n to which a potential for displaying information on the information display unit 702 is applied and a solid display unit 703. The electrode 713 to which the potential is applied is formed, and further, wiring (not shown) for applying a potential to these electrodes 712a to 712n, 713 is formed.

  In the electronic display 701 configured as described above, when a potential is selectively applied to the electrodes 712a to 712n, 713, the chargeable particles 723 move by the Coulomb force in the liquid 722 in the partition wall, and the electrode 712a To 712n, 713 and the transparent electrode 732. The partition wall liquid 722 is colored with a dye or pigment, for example, black, and the chargeable particles 723 contain a light scattering component having a high refractive index. Therefore, when observed from the transparent conductive film substrate 730 side, the electrodes 712a to 712n , 713 side the area where the charged particles 723 are attracted appears black, and the area where the charged particles 723 are attracted toward the transparent electrode 732 appear white, and this black area and the white area The information will be expressed and visible. Note that in the solid display portion 703, the electrode for displaying black or white in the solid display portion 703 is formed by one electrode 713, so that it appears black when the charged particles 723 are attracted to the electrode 713 side, Further, when the charged particles 723 are attracted to the transparent electrode 732 side, the white color appears.

Japanese Patent No. 3680996

  In an information display medium such as the electronic display described above, one electrode is arranged in a solid display unit that displays one color in a solid color, and black or white is displayed according to the potential applied to the electrode. However, in recent years, the electrodes as described above are formed by printing using a conductive paste. In this case, as the size of the solid display portion increases, the size of the electrode to be formed increases. Therefore, there is a problem that the manufacturing cost increases.

  Here, in the information display medium as described above, when a potential is applied to the electrode, in the region of the information display layer facing the electrode, the chargeable particles are contained in the liquid in the partition according to the applied potential. One of the two colors will be displayed by moving the button, but in reality, the influence of the potential applied to the electrode also in the region along the outer periphery of the region facing the electrode of the information display layer In response to the potential applied to the electrode, the chargeable particles move in the liquid in the partition wall, and there is a bleed region where the same color as the region facing the electrode is displayed. This blur area has a certain width in the area along the outer periphery of the area facing the electrode of the information display layer. Therefore, it is considered to solve the above-described problems by using this blur area.

  The present invention has been made in view of the problems of the conventional techniques as described above, and is an information display medium that displays a first color or a second color according to a potential applied to an electrode. An object of the present invention is to provide an information display medium that can reduce the cost for solid display when the electrodes are formed by printing using a conductive paste.

In order to achieve the above object, the present invention provides:
An information display layer that displays a first color or a second color according to an applied potential, and an electrode disposed on one surface of the information display layer in order to apply a potential to the information display layer And the information display layer displays a color corresponding to the potential applied to the electrode among the first color and the second color in a region facing the electrode, and faces the electrode. A blur region having a certain width for displaying a color corresponding to a potential applied to the electrode among the first color and the second color is provided along an outer periphery of the region, and at least in a part of the region An information display medium that solidly displays the first color or the second color,
In the electrode, the solid display region is divided into a plurality of grooves each having a width that is approximately twice or less the width of the blur region.

  In the present invention configured as described above, the information display layer has a solid display region among the electrodes for applying a potential for displaying the first color or the second color on the information display layer. The groove is divided into a plurality of grooves having a width that is approximately twice or less the width of the bleed region. Since this blur area displays the color according to the potential applied to the electrode among the first color and the second color along the outer periphery of the area facing the electrode of the information display layer, Even in the portion of the information display layer facing the groove, a color corresponding to the potential applied to the electrode will be displayed. As a result, the solid display area is divided into a plurality by the groove. A color corresponding to the potential applied to the electrode is displayed.

  In this way, in the solid display area, solid display is possible without arranging the electrode over the entire area. Therefore, when the electrode is formed by printing using a conductive paste, the solid display is performed. Cost will be reduced.

Also, an information display layer that displays the first color or the second color according to the applied potential, and an electrode disposed on one surface of the information display layer for applying a potential to the information display layer The information display layer displays a color corresponding to the potential applied to the electrode among the first color and the second color in a region facing the electrode; A blur region having a certain width for displaying a color corresponding to a potential applied to the electrode among the first color and the second color is provided along an outer periphery of the facing region, and at least a part of the blur region is displayed. An information display medium for displaying the first color or the second color in a region,
The electrode has a hole in the solid display area, and the hole has a shape and a size so that a region facing the information display layer is substantially covered by the blur area.

  In the present invention configured as described above, the information display layer has a hole in the solid display region of the electrode for applying a potential for displaying the first color or the second color, and the hole However, the opposing area | region of an information display layer comprises the shape and magnitude | size which are substantially covered with the bleed area | region which an information display layer comprises. Since this blur area displays the color according to the potential applied to the electrode among the first color and the second color along the outer periphery of the area facing the electrode of the information display layer, Even in the portion of the information display layer facing the hole, a color corresponding to the potential applied to the electrode will be displayed. As a result, in the solid display region, the electrode having the hole in its entirety. A color corresponding to the electric potential applied to is displayed.

  In this way, in the solid display area, solid display is possible without arranging the electrode over the entire area. Therefore, when the electrode is formed by printing using a conductive paste, the solid display is performed. Cost will be reduced.

  As described above, in the present invention, of the electrodes for applying the potential for displaying the first color or the second color on the information display layer, the solid display region is connected to the adjacent electrode in the information display layer. Since the structure is divided into a plurality of grooves each having a width that is approximately twice or less the width of the bleed region that displays the color corresponding to the applied potential, the electrode is formed even in the portion facing the groove of the information display layer. A color corresponding to the potential applied to the display will be displayed, so that it is possible to display a solid image without arranging the electrode over the entire area in the solid display region, and the electrode is made of a conductive paste. In the case of forming by printing, the cost for performing solid display can be reduced.

  In addition, the information display layer has a hole in a solid display region of an electrode to which a potential for displaying the first color or the second color is applied, and this hole has a region where the information display layer is opposed to the hole. In the information display layer, the information display layer has a shape and size that are substantially covered by a bleeding region that displays a color corresponding to the potential applied to the adjacent electrode. The color corresponding to the potential applied to the electrode is also displayed in the part facing the part, so that the solid display is possible without arranging the electrode over the whole in the solid display region. Thus, when the electrode is formed by printing using a conductive paste, the cost for performing solid display can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the information display medium of this invention, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c) is an internal structure. (D) is the A section enlarged view shown in (b). 2A and 2B are diagrams for explaining the operation of the electronic display shown in FIG. 1, where FIG. 1A is a cross-sectional view showing the movement of a chargeable particle in the vicinity of the electrode shown in FIG. 1, and FIG. FIG. 5C is a front view showing a blur area in the display layer, FIG. 5C is a cross-sectional view showing the state of the information display layer in the solid display portion shown in FIG. 1, and FIG. It is a surface view which shows how a display layer looks. It is a figure which shows how the information of the electronic display shown in FIG. 1 looks. It is a figure which shows 2nd Embodiment of the information display medium of this invention, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c) is an internal structure. (D) is the A section enlarged view shown in (b). 5A and 5B are diagrams for explaining the operation of the electronic display shown in FIG. 4, wherein FIG. 5A is a cross-sectional view showing the movement of the charged particles in the vicinity of the electrode shown in FIG. 4, and FIG. 5B is the information shown in FIG. FIG. 4C is a front view showing a blur area in the display layer, FIG. 4C is a cross-sectional view showing the state of the information display layer in the solid display unit shown in FIG. 4, and FIG. It is a surface view which shows how a display layer looks. It is a figure which shows how the information of the electronic display shown in FIG. 4 looks. It is a figure which shows 3rd Embodiment of the information display medium of this invention, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c) is an internal structure. (D) is the A section enlarged view shown in (b). 8A and 8B are diagrams for explaining the operation of the electronic display shown in FIG. 7, where FIG. 7A is a cross-sectional view showing the movement of the charged particles near the electrode shown in FIG. 7, and FIG. 7B is the information shown in FIG. 7. It is a surface view which shows the bleeding area in a display layer, and the appearance in a solid display part. It is a figure which shows how the information of the electronic display shown in FIG. 7 looks. It is a figure which shows other embodiment of the information display medium of this invention. It is a figure which shows an example of the structure of a general electronic display, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c) is a figure which shows an internal structure, (D) is the A section enlarged view shown in (b).

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1A and 1B are diagrams showing a first embodiment of an information display medium of the present invention, in which FIG. 1A is a front view, FIG. 1B is a cross-sectional view along AA ′ shown in FIG. Is a diagram showing the internal structure, (d) is an enlarged view of the portion A shown in (b).

  As shown in FIG. 1, the present embodiment is an electronic display 1 having an information display unit 2 that is a region for displaying information and a solid display unit 3 that is a region for displaying one color in a solid state. An information display layer 20 that displays black as the first color or white as the second color depending on the potential is sandwiched between the wiring electrode layer 10 and the transparent conductive film substrate 30.

  The transparent conductive film substrate 30 is configured by forming a transparent electrode (for example, ITO) 32 on one surface of a transparent substrate 31 made of glass or the like.

  In the information display layer 20, the partition wall liquid 22 colored in black with a dye or pigment is accommodated in a region surrounded by the partition wall 21 and the seal layer 24, and the partition wall liquid 22 has a high refractive index. The chargeable particles 23 containing the light scattering component are dispersed. The partition wall 21 includes a bottom portion, a side portion that is an outer peripheral portion of the information display layer 20, and a wall portion that divides the region surrounded by the side portion into a plurality of regions, and is on the side opposite to the bottom portion. The surface is open. And it laminates | stacks so that the bottom part side may become the wiring electrode layer 10, and the sealing layer 24 is laminated | stacked on the opened side. As the partition wall 21, for example, one having a thickness of about 20 μm is used, and the shape of the region surrounded by the partition wall 21 may be a square having a side of about 130 μm or a honeycomb shape.

  The wiring electrode layer 10 has a solid display of black or white on the base substrate 11 and electrodes 12a to 12n to which a potential for displaying information on the information display unit 2 is applied and a solid display unit 3. The electrode 13 to which the potential is applied is formed, and further, wiring (not shown) for applying a potential to these electrodes 12a to 12n, 13 is formed. The electrodes 12 a to 12 n and 13 are formed in a pattern corresponding to information displayed on the information display unit 2. In this embodiment, numbers are displayed using the electrodes 12a to 12n and 13, and a display unit including seven segments by the electrodes 12a to 12g, and a display unit including seven segments by the electrodes 12h to 12n, and It is possible to display a number from “0” to “99” depending on the applied state of potential to these electrodes 12a to 12n and the electrode 13 formed around the electrodes 12a to 12n and serving as the background of the numbers. it can.

  In addition, the electrode 13 is divided into a plurality of lines by a linear groove 14, and the divided electrodes 13 are connected to each other by wiring (not shown) formed on the base substrate 11. In the present embodiment, for simplicity of explanation, only the left side of the information display unit 2 in the figure of the electrode 13 is divided by the groove 14, but information is displayed on the information display unit 2. Grooves 14 may be formed in the upper and lower regions in the drawing, and in the seven segments, and the electrode 13 may be divided into a plurality of portions.

  Below, operation | movement of the electronic display 1 comprised as mentioned above is demonstrated.

  2 is a diagram for explaining the operation of the electronic display 1 shown in FIG. 1. FIG. 2A is a sectional view showing the movement of the chargeable particles 23 in the vicinity of the electrode 13 shown in FIG. 1 is a surface view showing a bleeding region in the information display layer 20 shown in FIG. 1, FIG. 3C is a cross-sectional view showing a state of the information display layer 20 in the solid display unit 3 shown in FIG. 1, and FIG. It is a surface view which shows how the information display layer 20 in the solid display part 3 in the state shown in FIG.

  In the electronic display 1 shown in FIG. 1, when a potential is selectively applied to the electrodes 12 a to 12 n and 13, the chargeable particles 23 move by the Coulomb force in the liquid 22 in the partition wall, and the electrodes 12 a to 12 n, 13 and the transparent electrode 32 are drawn toward one side. Since the partition wall liquid 22 is colored black with a dye or pigment, and the chargeable particles 23 contain a light scattering component having a high refractive index, when viewed from the transparent conductive film substrate 30 side, the electrodes 12a to 12n, The area where the charged particles 23 are attracted to the 13 side appears black, and the area where the charged particles 23 are attracted to the transparent electrode 32 appears white. The information becomes visible.

  Here, in the electronic display 1 shown in FIG. 1, for example, when a positive potential is applied to the electrodes 12 a to 12 n and 13, in the region facing the electrodes 12 a to 12 n and 13 of the information display layer 20, Although the chargeable particles 23 are attracted toward the electrodes 12a to 12n and 13 side, as shown in FIG. 2A, a region adjacent to the region facing the electrodes 12a to 12n and 13, that is, the electrodes 12a to 12n. , 13 is also affected by the potential applied to the electrodes 12a-12n, 13 in the region along the outer periphery of the region facing the electrodes 13, 13 so that the chargeable particles 23 are attracted to the electrodes 12a-12n, 13 side by a certain width. To go.

  Therefore, when the electronic display 1 is observed from the transparent conductive film substrate 30 side, the region facing the electrodes 12a to 12n, 13 becomes black as a colored display region 41 colored black as shown in FIG. In addition, in the region adjacent to the region facing the electrodes 12a to 12n, 13, the bleed region 42 having a constant width W appears to be the same black as the colored display region 41. Thereby, in the information display layer 20, the color according to the electric potential applied to the electrode is displayed among black and white in the area | region which opposes electrode 12a-12n, 13, and electrode 12a-12n, 13 is displayed. In the region adjacent to the region opposite to, the blur region 42 having a certain width for displaying a color corresponding to the potential applied to the electrode among black and white is provided. The bleeding area 42 is applied to the thickness of the information display layer 20, the thickness of the partition wall 21, the size of the space partitioned by the partition wall 21, the size of the chargeable particles 23, and the electrodes 12 a to 12 n and 13. The width is determined by the magnitude of the potential.

  Therefore, in the present embodiment, the width of the groove 14 that divides the electrode 13 disposed in the solid display unit 3 into a plurality is set to be twice the width W of the bleeding region 42. Then, as shown in FIG. 2C, when a positive potential is applied to the electrode 13, the chargeable particles 23 are attracted toward the electrode 13 in a region facing the electrode 13 of the information display layer 20, and the groove Also in the region facing 14, the chargeable particles 23 are attracted to the electrode 13 side.

  Accordingly, as shown in FIG. 2D, in the solid display unit 3, the region facing the groove 14 is covered with the bleeding region 42 of the information display layer 20, and the electrode divided into a plurality by the groove 14. The region facing 13 and the region facing the groove 14 appear to be the same black color as the colored display region 41 and the bleeding region 42, respectively. In the bleed region 42, there are cases where the chargeable particles 23 are attracted to the electrode side 13 side but do not contact the bottom of the partition wall 21, but also in this region, the chargeable particles 23 are attracted to the electrode side 13 side. Thus, the same black color as that of the colored display area 41 appears.

  FIG. 3 is a diagram showing how the information on the electronic display 1 shown in FIG. 1 is seen.

  As described above, in the electronic display 1 shown in FIG. 1, the electrode 13 arranged in the solid display unit 3 is divided into a plurality of grooves 14, but in the region facing the groove 14 of the information display layer 20. Since the color corresponding to the potential applied to the electrode 13 is displayed by the action of the blur region 42 of the information display layer 20, as shown in FIG. 3, the information display unit 2 applies the voltage to the electrodes 12a to 12n. The information 2a is displayed by displaying a color corresponding to the applied potential, and the solid display 3a is displayed with a solid display 3a whose entire surface is black. In the case shown in FIG. 3, when a negative potential is applied to all of the electrodes 12a to 12n, the chargeable particles 23 are attracted to the transparent electrode 32 side, and information "88" is displayed in white. .

  As a result, the solid display 3a can be displayed in one black color without disposing the electrode over the entire surface of the solid display portion 3 that performs the solid display 3a, and the electrode is formed by printing using the conductive paste. In this case, the cost for performing the solid display 3a can be reduced. The width of the divided electrode 13 may be set to 56 to 112 μm, for example, and the width of the groove 14 may be set to 30 to 43 μm, for example. However, in order to obtain the effect as described above, the width of the groove 14 needs to be not more than twice the width of the bleeding area 42. However, when actually observed with the naked eye, the color is solidly displayed with one color. Since the color difference in the region is difficult to recognize depending on the surrounding color, the width of the groove 14 may be slightly larger than twice the width of the bleeding region 42, including this. In the present application, the width of the groove 14 is defined to be approximately twice or less the width of the bleeding region 42.

(Second Embodiment)
4A and 4B are diagrams showing a second embodiment of the information display medium of the present invention, where FIG. 4A is a front view, FIG. 4B is a cross-sectional view taken along line AA ′ shown in FIG. Is a diagram showing the internal structure, (d) is an enlarged view of the portion A shown in (b).

  In this embodiment, as shown in FIG. 4, grooves 114 provided in the solid display unit 103 are formed in a grid pattern with respect to the one shown in FIG. 1, and thereby the electrodes 113 arranged in the solid display unit 103. Is different only in that it is divided into a plurality of matrix shapes.

  The operation of the electronic display 101 configured as described above will be described below.

  FIG. 5 is a diagram for explaining the operation of the electronic display 101 shown in FIG. 4, (a) is a cross-sectional view showing the movement of the chargeable particles 123 in the vicinity of the electrode 113 shown in FIG. 4, and (b). 4 is a surface view showing a bleeding area in the information display layer 120 shown in FIG. 4, FIG. 4C is a cross-sectional view showing a state of the information display layer 120 in the solid display unit 103 shown in FIG. 4, and FIG. It is a surface view which shows how the information display layer 120 in the solid display part 103 in the state shown in FIG.

  In the electronic display 101 shown in FIG. 4, for example, when a positive potential is applied to the electrodes 112a to 112n and 113, the electrodes 112a to 112n and 113 of the information display layer 120 are applied to the electrodes 112a to 112n and 113, as shown in FIG. In the facing region, the chargeable particles 123 are attracted toward the electrodes 112a to 112n and 113, but as shown in FIG. 5A, the region along the outer periphery of the region facing the electrodes 112a to 112n and 113 In FIG. 5, the charged particles 123 are attracted toward the electrodes 112 a to 112 n and 113 by a certain width under the influence of the potential applied to the electrodes 112 a to 112 n and 113.

  Therefore, when the electronic display 101 is observed from the transparent conductive film substrate 130 side, as shown in FIG. 5B, the regions facing the electrodes 112a to 112n, 113 become black as colored display regions 141 that are colored black. In addition, in the region along the outer periphery of the region facing the electrodes 112a to 112n, 113, the bleed region 142 having a constant width W appears to be the same black as the colored display region 141. Thereby, in the information display layer 120, a color corresponding to the potential applied to the electrode is displayed among black and white in a region facing the electrodes 112a to 112n, 113, and the electrodes 112a to 112n, 113 are displayed. In the region along the outer periphery of the region opposite to, there is a bleed region 142 having a certain width for displaying a color corresponding to the potential applied to the electrode among black and white.

  Therefore, also in this embodiment, the width of the groove 114 that divides the electrode 113 arranged in the solid display portion 103 into a plurality of portions is set to be twice the width W of the bleeding region 142. Then, as shown in FIG. 5C, when a positive potential is applied to the electrode 113, the chargeable particles 123 are attracted to the electrode 113 side in the region facing the electrode 113 of the information display layer 120, and the groove The chargeable particles 123 are also attracted to the electrode 113 side in the region facing 114.

  Accordingly, as shown in FIG. 5D, in the solid display unit 103, the region facing the groove 114 is covered by the bleeding region 142 of the information display layer 120, and the electrode divided into a plurality by the groove 114 is formed. The region facing 113 and the region facing the groove 114 appear to be the same black color as the colored display region 141 and the bleeding region 142, respectively.

  FIG. 6 is a diagram illustrating how the information on the electronic display 101 illustrated in FIG. 4 is seen.

  As described above, in the electronic display 101 shown in FIG. 4, although the electrode 113 arranged in the solid display unit 103 is divided into a plurality of grooves 114, in the region facing the groove 114 of the information display layer 120. Since the color corresponding to the potential applied to the electrode 113 is displayed by the action of the blur region 142 of the information display layer 120, the information display unit 102 applies the voltage to the electrodes 112a to 112n as shown in FIG. The information 102a is displayed by displaying a color corresponding to the applied potential, and the solid display 103a displays a solid display 103a whose entire surface is black.

  As a result, the solid display 103a can be displayed in one black color without disposing the electrode over the entire surface of the solid display portion 103 that performs the solid display 103a, and the electrode is formed by printing using a conductive paste. In this case, the cost for performing the solid display 103a can be reduced.

(Third embodiment)
7A and 7B are views showing a third embodiment of the information display medium of the present invention, where FIG. 7A is a surface view, FIG. 7B is a cross-sectional view along AA ′ shown in FIG. Is a diagram showing the internal structure, (d) is an enlarged view of the portion A shown in (b).

  In this embodiment, as shown in FIG. 7, a plurality of circular holes 214 having the same diameter are formed in a matrix on the electrode 213 arranged in the solid display portion 203 as compared with that shown in FIG. 1. Only the difference is.

  Hereinafter, the operation of the electronic display 201 configured as described above will be described.

  FIG. 8 is a diagram for explaining the operation of the electronic display 201 shown in FIG. 7. FIG. 8A is a cross-sectional view showing the movement of the charged particles 223 in the vicinity of the electrode 213 shown in FIG. FIG. 8 is a surface view showing a bleeding region in the information display layer 220 shown in FIG. 7 and how the solid display unit 203 looks.

  In the electronic display 201 shown in FIG. 7, for example, when a positive potential is applied to the electrodes 212a to 212n and 213, the electrodes 212a to 212n and 213 of the information display layer 220 are applied to the electrodes 212a to 212n and 213, as shown in FIG. In the facing region, the chargeable particles 223 are attracted toward the electrodes 212a to 212n and 213, but as shown in FIG. 8A, the region along the outer periphery of the region facing the electrodes 212a to 212n and 213. In FIG. 5, the charged particles 223 are attracted toward the electrodes 212 a to 212 n and 213 by a certain width W under the influence of the potential applied to the electrodes 212 a to 212 n and 213.

  Therefore, when the electronic display 201 is observed from the transparent conductive film substrate 230 side, the region facing the electrodes 212a to 212n and 213 appears to be colored black and is along the outer periphery of the region facing the electrodes 212a to 212n and 213. Also in the area, the area becomes a bleed area having a constant width W and appears black. Thereby, in the information display layer 220, a color corresponding to the potential applied to the electrode is displayed among black and white in a region facing the electrodes 212a to 212n and 213, and the electrodes 212a to 212n and 213 are displayed. In the region along the outer periphery of the region opposite to, there is a blur region having a certain width for displaying a color corresponding to the potential applied to the electrode among black and white.

  Therefore, in this embodiment, as shown in FIG. 8B, the maximum diameter of the hole 214 formed in the electrode 213 arranged in the solid display unit 203 is set to be twice the width W of the bleeding region 242. .

  Then, when a positive potential is applied to the electrode 213, the chargeable particles 223 are attracted to the electrode 213 side in the region facing the electrode 213 of the information display layer 220, and also in the region facing the hole 214. The particles 223 are attracted to the electrode 213 side, and, as shown in FIG. 8B, in the solid display unit 203, the region facing the hole 214 is formed by the blur region 242 of the information display layer 220. The region facing the electrode 213 disposed in the solid display portion 203 and the region facing the hole 214 formed in the electrode 213 are the same black as the colored display region 241 and the bleeding region 242 respectively. Become visible.

  FIG. 9 is a diagram showing how the information on the electronic display 201 shown in FIG. 7 is seen.

  As described above, in the electronic display 201 shown in FIG. 7, although the plurality of holes 214 are formed in the electrode 213 arranged in the solid display unit 203, the region facing the hole 214 of the information display layer 220. In FIG. 9, since the color corresponding to the potential applied to the electrode 213 is displayed by the action of the bleeding region 242 included in the information display layer 220, the information display unit 202 has electrodes 212a to 212n as shown in FIG. The information 202a is displayed by displaying a color corresponding to the potential applied to the solid, and the solid display 203a is displayed on the solid display unit 203 so that the entire surface is black.

  As a result, the solid display 203a can be displayed in one black color without disposing the electrode over the entire surface of the solid display portion 203 that performs the solid display 203a, and the electrode is formed by printing using a conductive paste. In this case, the cost for performing the solid display 203a can be reduced. Even in the size of the hole 214 in this embodiment, in order to obtain the above-described effect, it is necessary to make the maximum diameter not more than twice the width of the bleeding region 242. When observed, in a region that is solidly displayed by one color, it is difficult to recognize a difference in color depending on the surrounding color. Therefore, the maximum diameter of the hole 214 is slightly larger than twice the width of the bleeding region 242. In this application, including this, the diameter of the hole 214 is defined as approximately twice or less the width of the bleeding region 242.

(Other embodiments)
FIG. 10 is a diagram showing another embodiment of the information display medium of the present invention, and shows the configuration of a solid display unit.

  In the example shown in FIG. 1, the electrode 13 arranged on the solid display unit 3 is divided into a plurality of parts by the linear groove 14. However, as shown in FIG. 10A, the electrode 13 is arranged on the solid display unit. It is also conceivable that the electrode 313 is divided into a plurality of curved grooves 314.

  Further, as shown in FIG. 10 (b), the groove 414 for dividing the electrode 413 arranged in the solid display portion is cut off, and the electrode is not completely divided. In the present application including such a state, it is defined that the electrode is divided into a plurality of parts by the groove.

  Moreover, as shown in FIG.10 (c), it is also considered that the electrode 513 arrange | positioned at a solid display part is divided | segmented into plurality by the some groove | channel 514 formed in the periphery.

  That is, the plurality of grooves 14 as shown in FIG. 1 may be formed so as to extend in the same direction, or may be formed in different directions.

  Further, in the case shown in FIG. 7, a plurality of circular holes 214 having the same diameter are formed in a matrix on the electrode 213 arranged in the solid display portion 203, but in FIG. As shown, it is also conceivable that a plurality of square holes 614 having the same shape are formed in a matrix on the electrode 613 arranged in the solid display portion. In addition, the hole is not limited to a square, but may be a polygon such as a triangle or a rectangle, or a hole formed of an irregular curve such as a gourd shape. However, in any case, the hole portion needs to have a shape and a size so that the facing region of the information display layer is covered by the bleeding region. As described above, when actually observing with the naked eye, in a region that is solidly displayed with one color, it is difficult to recognize a slight color difference in the solid display portion due to the surrounding color. In this application, including a part that may not be covered by the bleed area, the hole is defined as a shape and size that is substantially covered by the bleed area in the area where the information display layer faces. .

  In the example shown in FIG. 7, a plurality of circular holes 214 having the same diameter are formed in a matrix on the electrode 213 arranged on the solid display unit 203, but the holes 214 are formed in a matrix. It is not necessary to be formed, and one hole 214 may be formed. The plurality of holes 214 are not limited to the same size.

  Further, in the above-described embodiment, the case where the solid display portions 3, 103, 203 are displayed in black by applying a positive potential to the electrodes 13, 113, 213 has been described as an example. Even when the solid display portions 3, 103, 203 are displayed in white by applying a negative potential to the electrodes 13, 113, 213, the solid display portions 3, 103, The whole 203 appears white. The two colors displayed on the electronic displays 1, 101, 201 are not limited to the above-described white and black, and the information 2a, 102a, 202a displayed on the information display units 2, 102, 202 can be identified. Any color is acceptable.

DESCRIPTION OF SYMBOLS 1,101,201 Electronic display 2,102,202 Information display part 2a, 102a, 202a Information 3,103,203 Solid display part 3a, 103a, 203a Solid display 10,110,210 Wiring electrode layer 11,111,211 Base Substrate 12a-12n, 13, 112a-112n, 113, 212a-212n, 213, 313, 413, 513, 613 Electrode 14, 114, 314, 414, 514 Groove 20, 120, 220 Information display layer 21, 121, 221 Partitions 22, 122, 222 Liquids in partitions 23, 123, 223 Chargeable particles 24, 124, 224 Seal layers 30, 130, 230 Transparent conductive film substrates 31, 131, 231 Transparent substrates 32, 132, 232 Transparent electrodes 41, 141 , 241 Colored display area 42, 142, 24 Bleeding area 214,614 holes

Claims (2)

An information display layer that displays a first color or a second color according to an applied potential, and an electrode disposed on one surface of the information display layer in order to apply a potential to the information display layer And the information display layer displays a color corresponding to the potential applied to the electrode among the first color and the second color in a region facing the electrode, and faces the electrode. A blur region having a certain width for displaying a color corresponding to a potential applied to the electrode among the first color and the second color is provided along an outer periphery of the region, and at least in a part of the region An information display medium that solidly displays the first color or the second color,
The electrode is an information display medium in which the solid display region is divided into a plurality of grooves each having a width that is approximately twice or less the width of the blur region. An information display layer that displays a first color or a second color according to an applied potential, and an electrode disposed on one surface of the information display layer in order to apply a potential to the information display layer And the information display layer displays a color corresponding to the potential applied to the electrode among the first color and the second color in a region facing the electrode, and faces the electrode. A blur region having a certain width for displaying a color corresponding to a potential applied to the electrode among the first color and the second color is provided along an outer periphery of the region, and at least in a part of the region An information display medium that solidly displays the first color or the second color,
The electrode has a hole in the solid display area, and the hole has a shape and a size in which a facing area of the information display layer is substantially covered by the blur area.

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