JP2011014068A - Bar code display medium - Google Patents

Abstract

When displaying a barcode using a plurality of electrodes, it is easy to form a wiring connected to the electrodes.
The identification information is expressed by alternately displaying white bars and black bars, the fixed area where the width of the bar is fixed irrespective of the identification information, and the width of the bar is the identification information. In a barcode display medium for displaying a barcode having a variable region that is variable according to the above, a plurality of strip electrodes 12 to 14 arranged in the bar alignment direction and displaying the bar are provided. Among the strip electrodes 12 to 14, a plurality of strip electrodes 12 for displaying white bars in the fixed region are connected to one wiring 15 b.
[Selection] Figure 2

Description

  The present invention relates to a bar code display medium for displaying a bar code, and more particularly to a display technique for a fixed area when displaying a bar code including a fixed area and a variable area.

  Conventionally, barcodes have been used to manage articles. This bar code represents the identification information in the white region by the width and interval of a plurality of black lines, and the identification information can be recognized by reading it with a bar code reader. Such a barcode is used by being directly printed on an article or printed on a label and attached to the article. For this reason, once printed barcodes cannot be changed. If barcodes are to be changed, the barcodes must be reprinted on the article or the label printed with the changed barcodes must be reapplied. Don't be.

  Therefore, a technique for displaying a barcode using an information display panel in which liquid crystal or a display medium is arranged between opposed electrodes and information is displayed by changing the state of the liquid crystal or the display medium using a potential applied to the electrode. (For example, refer to Patent Documents 1 and 2).

JP-A-64-41980 JP 2006-234911 A

  In the case of displaying a barcode using the information display panel as described above, in order to display the barcode, a plurality of electrodes having a width corresponding to the minimum width of the barcode are arranged side by side. Since a potential is selectively applied, wiring for applying a potential needs to be connected to each of the plurality of electrodes. However, the minimum width of a barcode is extremely narrow, and furthermore, depending on the type of barcode, the number of bars is extremely large, and it is difficult to arrange wiring connected to each of these electrodes. There is a problem of becoming. In particular, the wiring is generally formed by etching or screen printing using a conductive ink. However, in screen printing, the ink is thickly deposited, so it is difficult to form fine wiring. is there.

  Here, the barcode as described above is composed of a fixed area uniquely determined by its type and a variable area for identifying an article. Therefore, it is considered to solve the above-described problems by devising the display of the fixed area.

  The present invention has been made in view of the problems of the conventional techniques as described above, and facilitates the formation of wiring connected to electrodes when displaying a barcode using a plurality of electrodes. An object of the present invention is to provide a barcode display medium that can be used.

In order to achieve the above object, the present invention provides:
Identification information is expressed by alternately displaying a first bar having a first color and a second bar having a second color, and the widths of the first and second bars. Is a barcode display medium for displaying a barcode having a fixed area fixed regardless of the identification information and a variable area in which the width of the first and second bars is variable according to the identification information. And
A plurality of strip electrodes arranged side by side in the direction of arrangement of the first and second bars;
Wiring for applying a potential to the plurality of strip electrodes;
An information display means arranged to face the plurality of strip electrodes and displaying the first color or the second color according to the potential applied to the plurality of strip electrodes;
Among the plurality of strip electrodes, a plurality of strip electrodes for displaying the first bar in the fixed region are connected to one wiring.

  In the present invention configured as described above, the identification information is expressed by alternately displaying the first bar having the first color and the second bar having the second color. A barcode having a fixed area in which the width of the first and second bars is fixed regardless of the identification information, and a variable area in which the width of the first and second bars is variable according to the identification information. When displaying, the information display means uses the first color or the second color according to the potential applied via the wiring to the plurality of strip electrodes arranged in the direction in which the first and second bars are arranged. Is displayed, the barcode is displayed, but among the plurality of strip electrodes, the plurality of strip electrodes for displaying the first bar in the fixed region are connected to one wiring, Of the plurality of strip electrodes, the first bar in the fixed region In plurality of strip-like electrodes for Shimesuru, wiring connected is shared, whereby the number of wiring connected to the strip electrodes is reduced, wiring connected to the strip electrodes are easily formed.

  In addition, a plurality of strip electrodes are formed on one surface of the base substrate, and a strip electrode for displaying the second bar in the fixed region includes a first wiring formed on the one surface of the base substrate, and a base When connected to each other by a second wiring formed on the other surface of the substrate and connected to the first wiring through a conduction hole formed in the base substrate, the fixed region is sandwiched between the variable regions. Even if the plurality of strip electrodes for displaying the second bar in the fixed region are connected to one wiring without affecting the wiring of the variable region. it can.

  Moreover, if it is set as the structure which has the transparent base material which is arrange | positioned on the opposite side to the some strip | belt-shaped electrode of an information display means, and the display area of the 2nd bar | burr in a fixed area is colored in the 2nd color, In FIG. 5, the strip electrode and the wiring for displaying the second bar are not required, the number of wirings connected to the strip electrode is further reduced, and the wiring connected to the strip electrode is easily formed.

  As described above, in the present invention, the identification information is expressed by alternately displaying the first bar having the first color and the second bar having the second color, A bar code having a fixed area where the width of the first and second bars is fixed regardless of the identification information and a variable area where the width of the first and second bars is variable according to the identification information is displayed. In the barcode display medium, a plurality of strip electrodes arranged in the arrangement direction of the first and second bars, a wiring for applying a potential to the plurality of strip electrodes, and the plurality of strip electrodes facing each other Display means for displaying the first color or the second color in accordance with the potential applied to the plurality of strip electrodes, and displaying the first bar in the fixed region among the plurality of strip electrodes A plurality of strip electrodes are connected to one wiring. Therefore, among the plurality of strip electrodes, in the plurality of strip electrodes for displaying the first bar in the fixed region, the wiring to be connected is shared, and thereby the number of wirings connected to the strip electrode Can be reduced, and a wiring connected to the strip electrode can be easily formed.

  In addition, a plurality of strip electrodes are formed on one surface of the base substrate, and a strip electrode for displaying the second bar in the fixed region includes a first wiring formed on the one surface of the base substrate, and a base In a structure in which the fixed region is formed on the other surface of the substrate and connected to each other by the second wiring connected to the first wiring through the conduction hole formed in the base substrate, the fixed region is the variable region. Even if it is sandwiched between the two, the strip electrodes for displaying the second bar in the fixed area are connected to one wiring in a connected state without affecting the wiring in the variable area. Can do.

  In addition, in the configuration having a transparent base material arranged on the opposite side to the plurality of strip electrodes of the information display means, the display area of the second bar in the fixed area is colored in the second color, The band-like electrode and the wiring for displaying the second bar in the fixed region are not necessary, the number of wirings connected to the band-like electrode is further reduced, and the wiring connected to the band-like electrode can be easily formed.

It is a figure which shows an example of the barcode displayed by the barcode display medium of this invention. It is a figure which shows the structure of the wiring electrode board | substrate used for 1st Embodiment of the barcode display medium of this invention, (a) is the figure seen from the surface, (b) is A- shown to (a). It is A 'sectional drawing. It is a figure which shows the structure of the barcode display medium using the wiring electrode board | substrate shown in FIG. 2, (a) is the figure seen from the surface, (b) is AA 'sectional drawing shown to (a), (C) is the A section enlarged view shown in (b). It is a figure for demonstrating the operation | movement at the time of displaying the barcode shown in FIG. 1 with the barcode display medium shown in FIG. It is a figure which shows the structure of the wiring electrode board | substrate used for 2nd Embodiment of the barcode display medium of this invention, (a) is the figure seen from the surface, (b) is A- shown to (a). A 'sectional drawing, (c) is BB' sectional drawing shown to (a). It is a figure which shows the structure of the wiring electrode board | substrate used for 3rd Embodiment of the barcode display medium of this invention, (a) is the figure seen from the surface, (b) is A- shown to (a). It is A 'sectional drawing. It is a figure which shows the structure of the barcode display medium using the wiring electrode board | substrate shown in FIG. 6, (a) is the figure seen from the surface, (b) is AA 'sectional drawing shown to (a). is there.

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

  First, the barcode displayed by the barcode display medium of the present invention will be described.

  FIG. 1 is a diagram showing an example of a bar code displayed by the bar code display medium of the present invention, and shows what is called CODE 128. FIG.

  As shown in FIG. 1, the bar code in this example has first bars 4 having white as a first color and second bars 5 having black as a second color alternately arranged. The identification information is expressed by the width of the bars 4 and 5. Such a barcode 1 needs to be provided with a right margin, a left margin, a start code, and a stop code, which are represented by the widths of the bars 4 and 5 on both sides of the barcode 1, respectively. Further, in order to express the identification information 2 bits at a time, the expressed area is divided by bars 4 and 5. Since the information indicating the start code or stop code and the information for separating the area expressing the identification information are unambiguous regardless of the identification information to be expressed, the information is expressed. In the area, the widths of the bars 4 and 5 are fixed regardless of the identification information. That is, in the barcode 1 shown in FIG. 1, the fixed area 2 in which the widths of the bars 4 and 5 are fixed and the widths of the bars 4 and 5 are variable in accordance with the identification information regardless of the identification information to be expressed. It is composed of a variable area 3. Note that the variable area 3 also includes an area expressing a check digit.

(First embodiment)
2A and 2B are diagrams showing the configuration of the wiring electrode substrate used in the first embodiment of the barcode display medium of the present invention, where FIG. 2A is a diagram seen from the surface, and FIG. It is AA 'sectional drawing shown. The wiring electrode substrate 10 shown in FIG. 2 is used for a barcode display medium for displaying the barcode 1 shown in FIG.

  As shown in FIG. 2, the wiring electrode substrate in this embodiment has a plurality of strip electrodes 12 to 14 formed on one surface of the base substrate 11 side by side at a minute interval, and is connected to the strip electrode 12. 15a and 15b, wirings 16a to 16c connected to the strip electrode 13, and wiring 18 connected to the strip electrode 14 are formed. Further, each of the wirings 15b, 16a to 16c and 18 is connected to a connection terminal 17 for applying a potential to the strip electrodes 12 to 14 from the outside. Note that only a part of the band-shaped electrode 14, the wiring 18, and the connection terminal 17 is labeled, but all of the band-shaped electrodes arranged in the variable region 3 are the band-shaped electrode 14, and the band-shaped electrode 14. A wiring 18 is connected to each of them, and a connection terminal 17 is connected via the wiring 18.

  The strip electrode 12 is for displaying white in the fixed region 2, and the strip electrode 13 is for displaying black in the fixed region 2. Therefore, the widths of the strip electrodes 12 and 13 are substantially the same as the widths of the bars 4 and 5 in the fixed region 2 of the barcode 1 shown in FIG. The strip electrode 14 is for selectively displaying white or black according to the identification information expressed in the variable region 3. Therefore, the width is the minimum width of the bars 4 and 5 displayed in the variable area 3 of the barcode 1 shown in FIG. That is, these strip electrodes 12 to 14 are arranged side by side in the arrangement direction of the bars 4 and 5 shown in FIG.

  The plurality of strip electrodes 12 arranged in the fixed region 2 are connected to one wiring 15b in a state where they are connected to each other by the wiring 15a. As a result, the same potential is applied to the plurality of strip electrodes 12 arranged in the fixed region 2 by applying the potential via one connection terminal 17.

  In addition, the plurality of strip electrodes 13 arranged in the fixed region 2 are connected to the connection terminal 17 in a state of being connected to each other via the wirings 16a and 16b in the one arranged on both sides of the barcode 1, In the region sandwiched between the variable regions 3, they are individually connected to the connection terminals 17 via the wirings 16 c.

  3A and 3B are diagrams showing the configuration of a bar code display medium using the wiring electrode substrate 10 shown in FIG. 2, wherein FIG. 3A is a view seen from the surface, and FIG. A 'sectional drawing, (c) is the A section enlarged view shown in (b).

  As shown in FIG. 3, the bar code display medium in the present embodiment has an information display layer 20 serving as information display means, a transparent substrate on the surface of the wiring electrode substrate 10 shown in FIG. A transparent conductive film substrate 30 that is a material is laminated. 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, and the information display layer 20 includes a partition wall 21 and a seal layer 24. The partition wall liquid 22 in which the chargeable particles 23 are dispersed is accommodated in a region surrounded by. The wiring electrode substrate 10, the information display layer 20, and the transparent conductive film substrate 30 are formed in the partition wall in which the transparent electrode 32 and the strip electrodes 12 to 14 are accommodated in the region surrounded by the partition wall 21 and the seal layer 24. The liquid 22 is stacked so as to face each other. 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 oppose the wiring electrode board | substrate 10, and the sealing layer 24 is laminated | stacked on the opened side.

  Further, the transparent conductive film substrate 30 is provided with a mask printing 33 of black or the like in a region not facing the strip electrodes 12 to 14, whereby the wirings 15 a, 15 b, and 16 a formed on the wiring electrode substrate 10. -16c and 18 are not visually recognized through the transparent conductive film substrate 30.

  Hereinafter, barcode display by the barcode display medium configured as described above will be described.

  FIG. 4 is a diagram for explaining an operation when the barcode shown in FIG. 1 is displayed on the barcode display medium shown in FIG.

  When the barcode shown in FIG. 1 is displayed by the barcode display medium shown in FIG. 3, for example, the transparent electrode 32 is set to the GND potential, and the strip-like electrodes 12 to 14 formed on the base substrate 11 are fixed. The strip electrode 12 for displaying the white bar 4 in the region 2 and the strip electrode 14 for displaying the white bar 4 according to the identification information to be expressed in the variable region 3 are set to a negative potential and fixed. The strip electrode 13 for displaying the black bar 5 in the region 2 and the strip electrode 14 for displaying the black bar 5 according to the identification information desired to be expressed in the variable region 3 are set to a positive potential. This is performed by selectively applying a positive potential or a negative potential to the connection terminals 17 connected to the strip electrodes 12 to 14 via the wirings 15b, 16a to 16c, and 18. At this time, a plurality of strip electrodes 12 for displaying white in the fixed region 2 of the barcode 1 are formed on the wiring electrode substrate 10, but the plurality of strip electrodes 12 are formed by the wiring 15 a as described above. Since they are connected to one wiring 15b while being connected to each other, the wiring to which the plurality of strip electrodes 12 are connected is shared, thereby reducing the number of wirings connected to the strip electrodes 12-14. The wiring connected to the strip electrodes 12 to 14 can be easily formed. As a result, the same potential is applied to the plurality of strip electrodes 12 arranged in the fixed region 2 by applying the potential via one connection terminal 17. For wiring formation, generally, screen printing using etching or conductive ink is used. However, in screen printing, it is difficult to form fine wiring because the ink is thickly deposited. is there. Therefore, when the wiring is formed by screen printing, as described above, the number of the wirings connected to the strip electrodes 12 to 14 is reduced, so that the effect of facilitating the formation of the wiring is easily obtained.

  As described above, when the transparent electrode 32 is set to the GND potential and the strip electrodes 12 to 14 are set to the positive potential or the negative potential, the in-partition liquid 22 accommodated in the region surrounded by the partition 21 is made of a dielectric substance. Since the chargeable particles 23 are charged at a negative potential, as shown in FIG. 4A, the chargeable particles 23 move in the partition wall liquid 22 by the Coulomb force to be set at a negative potential. In the region where the strip electrodes 12 and 14 are formed, the chargeable particles 23 are attracted to the transparent electrode 32 side, and in the region where the strip electrodes 13 and 14 having a positive potential are formed, the chargeable particles. 23 is drawn toward the strip electrodes 13 and 14 side.

  The partition wall liquid 22 is colored with a dye or pigment, and the chargeable particles 23 contain a light scattering component having a high refractive index. Therefore, the region where the chargeable particles 23 are attracted to the strip electrodes 13 and 14 is colored. In addition, the region where the chargeable particles 23 are attracted to the transparent electrode 32 side is white.

  Then, in the fixed region 2, since the widths of the strip electrodes 12, 13 are the same as the widths of the bars 4, 5 of the barcode 1 shown in FIG. When the transparent conductive film substrate 30 is viewed from the side opposite to the wiring electrode substrate 10 because the disposed region is white and the region where the strip electrode 13 is disposed is colored, FIG. As shown in FIG. 1B, the fixed area 2 of the barcode 1 shown in FIG. 1 is expressed, and the start code, the stop code, and the delimiter of the identification information are recognized in the fixed area 2.

  In the variable region 3, the width of the strip electrode 14 is the minimum width of the bars 4 and 5 displayed in the variable region 3 of the barcode 1 shown in FIG. When the width of the bar 5 displayed in black is the same as the width of the strip electrode 14, one strip electrode 14 has a positive potential and the strip electrode 14 adjacent to the strip electrode 14 has a negative potential. Further, when the width of the bar 5 displayed in black in the variable region 3 is twice the width of the strip electrode 14, the two adjacent strip electrodes 14 are set to a positive potential and the two strip electrodes 14 are used. If the strip electrode 14 adjacent to both sides of the electrode is set to a negative potential, and the width of the bar 5 displayed in black in the variable region 3 is three times the width of the strip electrode 14, three adjacent strip electrodes 14 is set to a positive potential Depending on the width of the bar 5 displayed in black in the variable region 3, the strip electrode 14 has a positive potential or a negative potential, such that the strip electrodes 14 adjacent to both sides of the three strip electrodes 14 have a negative potential. It is said. Similarly, when the width of the bar 4 displayed in white in the variable region 3 is the same as the width of the strip electrode 14, one strip electrode 14 is set to a negative potential and the strip adjacent to the strip electrode 14. When the electrode 14 has a positive potential and the width of the bar 4 displayed in white in the variable region 3 is twice the width of the strip electrode 14, the two adjacent strip electrodes 14 have a negative potential. And the adjacent strip electrodes 14 on both sides of the two strip electrodes 14 have a positive potential, and the width of the bar 4 displayed in white in the variable region 3 is three times the width of the strip electrodes 14. Is displayed in white in the variable region 3 so that the three adjacent strip electrodes 14 have a negative potential and the adjacent strip electrodes 14 on both sides of the three strip electrodes 14 have a positive potential. Bar 4 width Strip electrode 14 is a positive potential or negative potential depending. As a result, when the transparent conductive film substrate 30 is viewed from the side opposite to the wiring electrode substrate 10, as shown in FIG. 4B, the variable region 3 of the barcode 1 shown in FIG. 3, the identification information is recognized. At this time, since the plurality of strip electrodes 14 having the same potential according to the widths of the bars 4 and 5 in the variable region 3 are arranged at a minute interval, the adjacent strip electrodes 14 are the same. In the case where the potential is set to, the minute interval is not recognized, and when the two adjacent strip electrodes 14 have the same potential, the bars 4 and 5 that are twice as thick as the strip electrodes 14 are recognized, and the adjacent 3 When the two strip electrodes 14 are set to the same potential, the bars 4 and 5 that are three times as thick as the strip electrodes 14 are recognized.

  In this embodiment, among the strip electrodes 13 in the fixed region 2, the strip electrodes 13 on both sides of the barcode 1, that is, the strip electrodes 13 for expressing the start code and the stop code are formed by the wirings 16a and 16b. Although connected to the connection terminal 17 in a state of being connected to each other, the band-like electrode 13 for separating the region expressing the identification information in the variable region 3 is individually connected to the connection terminal 17 via the wiring 16c. Also, the strip electrode 13 for expressing the start code and the stop code may be individually connected to the connection terminal 17.

(Second Embodiment)
FIGS. 5A and 5B are diagrams showing the configuration of the wiring electrode substrate used in the second embodiment of the barcode display medium of the present invention. FIG. 5A is a diagram seen from the surface, and FIG. AA ′ sectional view shown, (c) is a BB ′ sectional view shown in (a). The wiring electrode substrate 110 shown in FIG. 5 is also used as a barcode display medium for displaying the barcode 1 shown in FIG.

  As shown in FIG. 5, the wiring electrode substrate in this embodiment is different from that shown in the first embodiment in that all the strip electrodes 13 for displaying the black bar 5 in the fixed region 2 are mutually connected. The only difference is that they are connected.

  In the barcode 1 shown in FIG. 1, a part of the fixed area 2 is sandwiched between the variable areas 3. Therefore, in order to display such a bar code 1, the strip electrodes 12 for displaying white in the fixed region 2 are connected to each other by the wiring 15a as shown in the first embodiment. Although it can be connected to one wiring 15b, the band-like electrode 13 for displaying black in the fixed region 2 cannot be connected to one wiring because the variable region 3 is disposed between them.

  In the base substrate 11 in this embodiment, a through hole 19 serving as a conduction hole is formed. The through holes 19 are formed on the first wirings 16 a and 16 b that connect the strip electrodes 13 disposed in the region of the strip electrode 13 that is not sandwiched between the variable regions 3 on the surface of the base substrate 11, respectively. Four are formed on the first wiring 16c extending from the strip electrode 14 disposed in the region sandwiched between the variable regions 3, and these four are formed by the second wiring 16d formed on the back surface of the base substrate 11. Two through holes 19 are connected to each other.

  Thereby, the strip electrode 13 for displaying black in the fixed region 2 is formed on the wirings 16 a to 16 c formed on the surface of the base substrate 11 and the back surface of the base substrate 11, via the through hole 19. In the barcode 1 which is connected to each other by the wiring 16d connected to the wirings 16a to 16c and a part of the fixed region 2 is sandwiched between the variable regions 3 as shown in FIG. While the band-like electrodes 12 for displaying white color in the region 2 are connected to one wiring 15b while being connected to each other by the wiring 15a, the band-like electrode 13 for displaying black in the fixed region 2 is also connected to one wiring. Can be connected. Thereby, even when the strip-shaped electrode 13 for displaying black is sandwiched between the variable regions 3, the number of wirings connected to the strip-shaped electrodes 12-14 is reduced and the strip-shaped electrodes 12-14 are connected. This makes it easy to form the wiring.

  In the wiring electrode substrate 110 configured as described above, the information display layer 20 and the transparent conductive film substrate 30 are stacked, and the strip electrodes 12 to 14 are set to a positive potential or the like, as in the first embodiment. By making the potential negative, the bar code 1 shown in FIG. 1 is displayed.

(Third embodiment)
6A and 6B are diagrams showing a configuration of a wiring electrode substrate used in the third embodiment of the barcode display medium of the present invention, where FIG. 6A is a diagram seen from the surface, and FIG. It is AA 'sectional drawing shown. Note that the wiring electrode substrate 210 shown in FIG. 6 is also used as a barcode display medium for displaying the barcode 1 shown in FIG.

  As shown in FIG. 6, the wiring electrode substrate in this embodiment is provided with a strip-like electrode 13 for displaying the black bar 5 in the fixed region 2 with respect to that shown in the first embodiment. Only the difference is not. That is, the wiring electrode substrate 210 in this embodiment is not provided with the belt-like electrode 13 corresponding to the black bar 5 in the fixed region 2 of the barcode 1 shown in FIG.

  7A and 7B are diagrams showing a configuration of a barcode display medium using the wiring electrode substrate 210 shown in FIG. 6, where FIG. 7A is a view seen from the surface, and FIG. 7B is a view of A− shown in FIG. It is A 'sectional drawing.

  As shown in FIG. 7, the bar code display medium in this embodiment is formed on the wiring electrode substrate 210 shown in FIG. 6 and the information display layer 20 and the transparent conductive film substrate in the same manner as shown in the first embodiment. In the transparent conductive film substrate 30, in the region facing the region where the strip electrode 13 is disposed in the first embodiment, that is, in the wiring electrode substrate 210 shown in FIG. A black mask printing 34 by the bar 5 shown in FIG. 1 is applied to a region facing the region where the strip electrode 13 is not disposed. Thereby, in the barcode display medium in this embodiment, the display area of the bar 5 in the fixed area 2 of the barcode 1 shown in FIG.

  In the barcode display medium configured as described above, the strip electrode 12 is set to a minus potential, and the strip electrode 14 is set to a plus potential or a minus potential according to identification information to be expressed. Then, the color seen from the transparent conductive film substrate 30 side of the information display layer 20 is controlled and the region facing the strip electrode 12 seems to be a white bar 4 as in the first embodiment. Thus, the region facing the strip electrode 14 can be seen as the arrangement of the bars 4 and 5 according to the identification information. And in the display area of the bar 5 of the fixed area 2, the color visible from the transparent conductive film substrate 30 side of the information display layer 20 does not change as the color of the base substrate 11 because no strip electrode is arranged. The black color by the mask printing 34 of the transparent conductive film substrate 30 is visible, whereby the barcode 1 shown in FIG. 1 is recognized.

  Thus, in this embodiment, the strip electrode 13 corresponding to the black bar 5 is not arranged in the fixed region 2 of the barcode 1 shown in FIG. 34, the band-like electrode and the wiring for displaying the bar 5 in the fixed region 2 are not required, the number of wirings connected to the band-like electrode is further reduced, and the wiring connected to the band-like electrode is formed. Can be easier.

  Note that the colors of the bars 4 and 5 in the above-described three embodiments may be reversed, and are not limited to the above-described white and black, and are two colors that can be read by a barcode reader. If it is. However, since the reading of the bar code 1 by the bar code reader requires very accurate white reading due to the reflection of light or the like, the reading in the fixed region 2 as shown in the above-described three embodiments. By displaying white using the information display layer 20 that is the same display means as the variable area 3 instead of printing, the color of the bar that is white among the bars 4 and 5 constituting the barcode 1 is fixed. 2 and the variable area 3 are unified, whereby the information expressed by the barcode 1 can be accurately recognized.

  The barcode displayed on the barcode display medium of the present invention is not limited to CODE128 as shown in FIG. 1, but has a fixed area and a variable area such as JAN, ITF, CODE39, NW-7, etc. If so, it can be applied.

  Further, as described above, the bar code display medium of the present invention is not limited to the vertical electrophoretic method in which the display is switched by the chargeable particles 23 dispersed in the partition wall liquid 22 being moved by the potential difference generated on the front and back sides. First, a cholesteric liquid crystal system that performs display using two different molecular orientations due to phase transition between the electrodes arranged on the front and back sides, and electro that develops an organic dye by reversibly oxidizing / reducing it. Any display can be applied as long as the display is switched by voltage application, such as a chromic system, an electronic powder, or EL (Electro Luminescence).

1 Bar code 2 Fixed area 3 Variable area 4, 5 Bar 10, 110, 210 Wiring electrode substrate 11 Base substrate 12-14 Strip electrodes 15a, 15b, 16a-16c, 16c, 18 Wiring 17 Connection terminal 19 Through hole 20 Information display Layer 21 Partition 22 Liquid in partition 23 Chargeable particle 24 Seal layer 30 Transparent conductive film substrate 31 Transparent substrate 32 Transparent electrode 33, 34 Mask printing

Claims (3)

Identification information is expressed by alternately displaying a first bar having a first color and a second bar having a second color, and the widths of the first and second bars. Is a barcode display medium for displaying a barcode having a fixed area fixed regardless of the identification information and a variable area in which the width of the first and second bars is variable according to the identification information. And
A plurality of strip electrodes arranged side by side in the direction of arrangement of the first and second bars;
Wiring for applying a potential to the plurality of strip electrodes;
An information display means arranged to face the plurality of strip electrodes and displaying the first color or the second color according to the potential applied to the plurality of strip electrodes;
A barcode display medium in which, among the plurality of strip electrodes, a plurality of strip electrodes for displaying the first bar in the fixed region are connected to one wiring. The barcode display medium according to claim 1,
The plurality of strip electrodes are formed on one surface of a base substrate,
A strip electrode for displaying the second bar in the fixed region is formed on a first wiring formed on one surface of the base substrate and on the other surface of the base substrate. A barcode display medium connected to each other by a second wiring connected to the first wiring through a formed conduction hole. The barcode display medium according to claim 1,
A bar code display medium having a transparent base material disposed on the opposite side of the plurality of strip electrodes of the information display means and in which the display area of the second bar in the fixed area is colored in the second color .

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