JP2018163219A - Information display medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent display from being tainted when the medium is folded, without forming the medium made of an expensive structure.SOLUTION: The information display medium includes: a folding part 3 as a predetermined foldable region; a base material 10; a display electrode 21 formed on a surface of the base material 10; a transparent electrode 32 opposed to the surface of the base material 10 where the display electrode 21 is formed; and an information display layer 33 between the base material 10 and the transparent electrode 32, the information display layer variably displaying information by the difference in the potential between the display electrode 21 and the transparent electrode 32, the information display layer 33 having a region overlapping with the folding part 3 and the region having been removed in advance.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an information display medium that variably displays information, and more particularly to a technique that enables folding.

  Conventionally, as a display device for displaying information, a CRT display, a liquid crystal display, a plasma display, or the like is used. These can be used for television receivers to display television images transmitted from television stations, or to be used as personal computer displays to display information stored on personal computers or distributed via the Internet. Can be. In addition to the display device as described above, a thin and thin information display medium such as paper is widely used. Such an information display medium is configured by laminating an electrode substrate having a display electrode formed on one surface and a transparent substrate having a transparent electrode provided on the entire surface of the one surface via an information display layer. Thus, information is variably displayed on the information display layer by the potential difference between the display electrode and the transparent electrode.

  In recent years, as the information display medium as described above, there has been considered one that improves convenience by adopting a foldable configuration, and is disclosed in, for example, Patent Document 1. The information display medium disclosed in Patent Document 1 is an electronic paper in which a base layer, a display layer, and a protective layer are laminated in this order, and the thickness of the display layer is reduced only at the bent portion or the bent portion is used as a base. By constituting the display layer only from the layers, or by making the display layer hollow at the folded portions, the folded portions can be bent with reduced rigidity.

Japanese Patent No. 4287675

  However, in the technique disclosed in Patent Document 1, when the thickness of the display layer is reduced only in the bent portion, the microcapsule layer constituting the display layer is broken by being bent, and the microcapsule flows out of the partition wall to the outside. The display may become dirty. In addition, when the bent part is composed only of the base layer, or when the display layer is made hollow at the bent part, a plurality of display parts for displaying information are provided, so a controller for controlling the display of the display part However, there is a problem that a plurality of them are necessary and expensive.

  The present invention has been made in view of the problems of the conventional techniques as described above, and an information display medium that can avoid the occurrence of dirt on the display even when it is folded without an expensive configuration. The purpose is to provide.

In order to achieve the above object, the present invention provides:
An information display medium configured to be foldable with a predetermined region as a fold,
A base substrate;
A display electrode formed on one surface of the base substrate;
A transparent electrode disposed facing the surface of the base substrate on which the display electrode is formed;
An information display layer that is disposed between the base substrate and the transparent electrode and variably displays information according to a potential difference between the display electrode and the transparent electrode;
In the information display layer, a region overlapping the folded portion is removed in advance.

  In the present invention configured as described above, when the predetermined region is folded as a folding portion, the base substrate and the transparent electrode are folded around the folding portion, but the information display layer has a region overlapping the folding portion in advance. By being removed, a load due to being bent is not applied, so that the information display layer is not broken and the microcapsules and the like flow out to the outside so that the display is not soiled. Further, at this time, since each of the base substrate and the transparent electrode on which the display electrode is formed is not divided at the folding portion, it is not necessary to provide a plurality of controllers for controlling the display.

  In addition, if a half slit is formed in a region overlapping the folding portion of the base substrate, it can be easily folded by the half slit, and the half cut is formed on the surface opposite to the surface on which the display electrode is formed. If it is formed, the folded portion is easily recognized.

  According to the present invention, the display electrode is formed on one surface of the base substrate, the transparent electrode is disposed to face the surface of the base substrate on which the display electrode is formed, and between the display electrode and the transparent electrode. In a configuration in which an information display layer that variably displays information according to a potential difference is disposed between the base substrate and the transparent electrode, a region that overlaps with the folded portion of the information display layer is removed in advance, so that even when folded, information No load is applied to the display layer, and it is possible to prevent the display from being stained due to the destruction of the information display layer and the outflow of the microcapsules and the like. Further, at this time, each of the base substrate and the transparent electrode on which the display electrode is formed is configured not to be divided at the folding portion, so there is no need to provide a plurality of controllers for controlling the display. Therefore, it is possible to realize a configuration that prevents the display from being stained without using an expensive configuration.

  In addition, in the case where the half slit is formed in the region overlapping the folding part of the base substrate, it can be easily bent by the half slit, and the half cut is opposite to the surface on which the display electrode is formed. If it is formed on the surface, the folded portion can be easily recognized.

It is a figure which shows one Embodiment of the back electrode unit used for the information display medium of this invention, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c). Is a back view. It is a figure which shows one Embodiment of the information display medium of this invention using the back surface electrode unit shown in FIG. 1, (a) is a surface figure, (b) is the AA 'cross section shown to (a). FIG. 4C is a diagram showing a detailed structure of the information display layer. It is a figure for demonstrating the manufacturing method of the information display medium shown in FIG. It is sectional drawing which shows the state which bent the information display medium shown in FIG. It is a figure which shows other embodiment of the back electrode unit used for the information display medium of this invention, (a) is a surface figure, (b) is AA 'sectional drawing shown to (a), (c) ) Is a back view. It is a figure which shows other embodiment of the information display medium of this invention using the back surface electrode unit shown in FIG. 5, (a) is a surface figure, (b) is AA 'shown to (a). It is sectional drawing.

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

  1A and 1B are diagrams showing an embodiment of a back electrode unit used in an information display medium of the present invention. FIG. 1A is a front view, and FIG. 1B is a cross-sectional view taken along line AA ′ shown in FIG. (C) is a back view.

  As shown in FIG. 1, the back electrode unit in this embodiment includes two display electrode portions 1 a and 1 b arranged side by side, and a display electrode 21 and wiring 22 formed on one surface of the base substrate 10. Yes.

  In each of the display electrode portions 1a and 1b, seven display electrodes 21 are formed in a segment shape in accordance with information to be displayed using the display electrode portions 1a and 1b. Each of the display electrodes 21 is connected to a wiring 22 for applying a voltage by transmitting an electric signal to the display electrode 21. The display electrode 21 formed on the display electrode portions 1a and 1b is connected to the wiring 22 extending from the end on the display electrode portion 1a side in the arrangement direction of the display electrode portions 1a and 1b of the back electrode unit 1. Yes. Therefore, the wiring 22 connected to the display electrode 21 of the display electrode portion 1b is formed across the boundary between the display electrode portions 1a and 1b.

  The base substrate 10 is made of, for example, an insulating material such as a PET (polyethylene terephthalate) film or a PEN (polyethylene naphthalate) film, and is printed with a display electrode 21 and wiring by using a conductive paste mainly composed of silver or the like. 22 is formed. A half slit 13 is linearly formed at the boundary between the display electrode portions 1a and 1b on the surface of the base substrate 10 opposite to the surface on which the display electrodes 21 and the wirings 22 are formed.

  FIG. 2 is a diagram showing an embodiment of the information display medium of the present invention using the back electrode unit 1 shown in FIG. 1, wherein (a) is a front view and (b) is shown in (a). AA ′ sectional view, (c) is a diagram showing a detailed structure of the information display layer 33.

  As shown in FIG. 2, the information display medium in the present embodiment includes an information display layer 33, a transparent electrode on the surface of the base substrate 10 in which the display electrode 21 and the wiring 22 are formed in the back electrode unit 1 shown in FIG. 1. 32 and the transparent base material 31 are laminated in this order, and the information display layer 33 is adhered to the base base material 10 with an adhesive 40. Accordingly, the transparent electrode 32 is disposed to face the surface of the base substrate 10 on which the display electrode 21 is formed, and the information display layer 33 is disposed between the base substrate 10 and the transparent electrode 32. ing. And the area | region which overlaps with the half slit 13 turns into the folding part 3, and it can be bend | folded.

  The information display layer 33, the transparent electrode 33, and the transparent base material 31 constitute the electronic paper part 30 and are stacked over the display electrode parts 1a and 1b shown in FIG. In other words, in the area overlapping the folding part 3, the information display layer 33 and the adhesive 40 are removed in advance from the electronic paper part 30.

  As shown in FIG. 2C, the information display layer 33 is configured such that the partition wall liquid 33b in which the microcapsules 33a are dispersed is accommodated in a region surrounded by the partition wall 33c.

  In the information display medium 2 configured as described above, a predetermined voltage is applied to the transparent electrode 32 by a controller (not shown) that is connected to the transparent electrode 32 and connected to the display electrode 21 via the wiring 22. In the applied state, two types of voltages are selectively applied to the display electrode 21 according to the information to be displayed, so that the potential due to the potential difference between the transparent electrode 32 and the display electrode 21 is applied to the information display layer 33. Is granted. Then, the microcapsule 33a moves in the partition wall liquid 33b to the transparent electrode 32 side or the display electrode 21 side according to the applied potential, and the partition wall liquid 33b is colored with a dye or pigment. Since 33a contains a light scattering component having a high refractive index, a region where the microcapsule 33a has moved to the transparent electrode 32 side and a region where the microcapsule 33a has moved to the display electrode 21 side are visible from the transparent substrate 31 side. Accordingly, the colors “00” to “99” are displayed.

  Below, the manufacturing method of the information display medium 2 comprised as mentioned above is demonstrated.

  FIG. 3 is a diagram for explaining a method of manufacturing the information display medium 2 shown in FIG.

  When the information display medium 2 shown in FIG. 2 is manufactured, first, the display electrodes 21 and the wirings 22 are formed on the base substrate 10 by printing using a conductive paste (FIG. 3A).

  Next, the half slit 13 is formed in the area | region used as the folding part 3 among the surfaces on the opposite side to the display electrode 21 and the wiring 22 of the base base material 10, and the back electrode unit 1 shown in FIG. FIG. 3 (b)).

  Further, the adhesive 40 is applied to the entire surface of the electronic paper unit 30 including the transparent base material 31, the transparent electrode 32, and the information display layer 33 on the information display layer 33 side (FIG. 3C).

  Next, only the information display layer 33 in the adhesive 40 and the electronic paper unit 30 is irradiated by irradiating the region to be the folded portion 3 with laser light from the surface of the electronic paper unit 30 on which the adhesive 40 is applied. Is removed linearly (FIG. 3D). In addition, since a part of the information display layer 33 is removed by irradiating the laser beam, the microcapsule 33a and the liquid 33b in the partition wall flow out from a part of the information display layer 33 that is in contact with the removed part. There is nothing.

  Thereafter, the display electrode 21 and the wiring 22 are formed on one surface and the display electrode 21 and the wiring 22 of the back electrode unit 1 are formed on the other surface. The electronic paper part 30 from which the adhesive 40 has been applied and the adhesive 40 and a part of the information display layer 33 have been removed is the laminated surface, and the adhesive 40 and the information display are displayed. The layer 33 is laminated so that the region from which the layer 33 is removed overlaps the half slit 13, and these are bonded by the adhesive 40 to complete the information display medium 2 shown in FIG. 2 (FIG. 3E).

  In addition, the timing which forms the half slit 13 in the base base material 10 is not restricted to after the display electrode 21 and the wiring 22 are formed in the base base material 10 as described above, but the display electrode 21 and the wiring in the base base material 10. It may be before 22 is formed, or may be after the electronic paper portion 30 is bonded to the back electrode unit 1 by the adhesive 40. Further, the half cut 13 may be formed on the same surface as the display electrode 21 and the wiring 22 instead of the surface of the base substrate 10 opposite to the display electrode 21 and the wiring 22.

  Below, the effect | action at the time of bending the information display medium 2 mentioned above is demonstrated.

  4 is a cross-sectional view showing a state in which the information display medium 2 shown in FIG. 2 is bent.

  The information display medium 2 configured as described above can be bent around the folding portion 3. And since the information by the change of the state of the information display layer 33 is visually recognized from the transparent base material 31 side, as shown in FIG. 4, the transparent base material 31 becomes an outer side centering on the folding part 3. As shown in FIG. Can be folded. In that case, since the half slit 13 is formed in the area | region which overlaps with the folding part 3 of the base base material 10, while being able to recognize the folding part 3 easily, it can be easily bent by the half slit 13.

  When the information display medium 2 is folded around the folding part 3, the base substrate 10, the transparent substrate 31 and the transparent electrode 32 are folded around the folding part 3, but the information display layer 33 is an area overlapping the folding part 3. Is removed in advance, so that a load due to bending is not applied. Thereby, the partition 33c of the information display layer 33 is not broken and the microcapsule 33a and the liquid 33b in the partition do not flow to the outside, and the display is prevented from getting dirty.

  Further, the base substrate 10 is not divided at the folding portion 3, and the display electrodes 21 formed on the base substrate 10 are all display electrodes in the arrangement direction of the display electrode portions 1 a and 1 b of the back electrode unit 1. The wiring 22 extends from and is connected to the end portion on the side of the portion 1a, and the transparent electrode 33 is laminated over the display electrode portions 1a and 1b. In this state, two types of voltages are selectively applied to the display electrode 21 according to information to be displayed, whereby the potential difference between the transparent electrode 32 and the display electrode 21 is applied to the information display layer 33. Therefore, it is not necessary to provide a plurality of controllers for controlling display, and the above-described high cost can be obtained without an expensive configuration.

(Other embodiments)
5A and 5B are diagrams showing another embodiment of the back electrode unit used in the information display medium of the present invention, where FIG. 5A is a front view, and FIG. 5B is a cross-sectional view taken along line AA ′ shown in FIG. FIG. 4C is a rear view. FIG. 6 is a view showing another embodiment of the information display medium of the present invention using the back electrode unit 101 shown in FIG. 5, wherein (a) is a front view and (b) is shown in (a). It is AA 'sectional drawing.

  As shown in FIGS. 5 and 6, the back electrode unit and the information display medium using the back electrode unit in this embodiment are half in the region of the folding portion 103 of the base substrate 10 as shown in FIGS. 1 and 2. The slit 13 is not formed, but instead, a fold support line 113 indicating the fold portion 103 is displayed on the surface of the base substrate 10 opposite to the display electrode 21 and the wiring 22. It is.

  The information display medium 102 configured as described above can recognize the folded portion 103 by the folding support line 113, and the transparent base material 31 is centered on the folded portion 103, as shown in FIG. 2. Can be folded to the outside. Since the area where the information display layer 33 overlaps the folding part 103 is removed in advance, the load due to the bending is not applied to the information display layer 33, and a predetermined voltage is applied to the transparent electrode 32 by one controller. In the state where the voltage is applied, two kinds of voltages are selectively applied to the display electrode 21 according to the information to be displayed, thereby causing a potential difference between the transparent electrode 32 and the display electrode 21 on the information display layer 33. A potential is applied.

DESCRIPTION OF SYMBOLS 1,101 Back electrode unit 2,102 Information display medium 3,103 Folding part 1a, 1b Display electrode part 10 Base base material 13 Half slit 21 Display electrode 22 Wiring 30 Electronic paper part 31 Transparent base material 32 Transparent electrode 33 Information display layer 33a Microcapsule 33b Liquid in partition wall 33c Partition wall 40 Adhesive 113 Folding support line

Claims (2)

An information display medium configured to be foldable with a predetermined region as a fold,
A base substrate;
A display electrode formed on one surface of the base substrate;
A transparent electrode disposed facing the surface of the base substrate on which the display electrode is formed;
An information display layer that is disposed between the base substrate and the transparent electrode and variably displays information according to a potential difference between the display electrode and the transparent electrode;
The information display medium is an information display medium in which a region overlapping with the folded portion is removed in advance. The information display medium according to claim 1,
The base substrate is an information display medium in which a half slit is formed in a region overlapping the folding portion.

Images