JP2007316257A - Electrochemical display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrochromic display device capable of preventing the deviation in an amount of deposition of metal in a display electrode. <P>SOLUTION: The electrochromic display device is equipped with back electrode sections 22B and 22F consisting of a first conductive member 28, display electrode sections 21B and 21F consisting of a second conductive member and corresponding to the back electrode sections 22B and 22F, and conductive diluents 24 arranged between the back electrode sections 22B and 22F and the display electrode sections 21B and 21F and dissolved with the metal, and includes display segment sections 20B and 20F depositing or dissolving the metal in the conductive diluents 24 for coloring or decoloring by implanting charges to the conductive diluents 24 between the display electrode sections 21B and 21F and the back electrode sections 22B and 22F. The back electrode sections 22B and 22F and the display electrode sections 21B and 21F corresponding to the back electrode sections 22B and 22F are formed in superposition over the entire part of the back electrode sections 22B and 22F. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrochromic display device.

  FIG. 9 is a cross-sectional view of a display panel provided with a display segment portion in a conventional general electrochromic display device. In addition, the electrochromic display device means that the electrolyte in the electrolytic solution is deposited by reduction or oxidation reaction by injecting a negative or positive charge into the electrolytic solution in which a metal such as bismuth (Bi) is dissolved as an electrolyte. It is a display device that uses the phenomenon of melting or melting. Here, a case of an electrochromic display device using bismuth (Bi) as a main raw material will be described as an example.

  As shown in FIG. 9, the display panel 100 of the electrochromic display device includes a conductive plate 103 having conductivity and made of a metal such as copper, and indium tin oxide on the surface facing the conductive substrate 103. A glass substrate 109 on which a transparent electrode 101 made of (ITO) or the like is formed is arranged in parallel, and an electrolytic solution 105 in which Bi is dissolved is filled between the transparent electrode 101 and the conductive substrate 103, and a sealing material 107. It is the structure sealed by. Further, by providing an insulating resist 111 on the surface of the transparent electrode 101 facing the conductive substrate 103, a part between the transparent electrode 101 and the conductive substrate 103 is insulated, The transparent electrode in this portion becomes the wiring electrode 101b. Here, a portion of the transparent electrode 101 that is exposed without being covered with the resist 111, that is, a portion where the opening 113 of the resist 111 and the conductive substrate 103 are opposed to each other is used as the display electrode portion 101a, and the conductive substrate. A display segment portion 115 is constituted by a portion of the portion 103 facing the display electrode portion 101a and the electrolytic solution 105 contained therebetween. Here, the electrochromic display device includes a plurality of display segment portions 115 in which openings 113 are formed in the resist 111 at a plurality of locations (not shown). In addition, the material shown here is an example and can be changed suitably. For example, the metal dissolved in the electrolytic solution is not limited to Bi, but may be silver (Ag) or the like. Various solutions such as odorous acid, hydrochloric acid, and iodic acid can be used as a solution for dissolving Bi. Furthermore, instead of the electrolytic solution 105 between the transparent electrode 101 and the conductive substrate 103, a wet cake sheet (see Non-Patent Document 1) holding the electrolytic solution 105 may be used.

  In the electrochromic display device as described above, when a negative charge is injected into the electrolytic solution 105, Bi ions in the electrolytic solution 105 are reduced and deposited on the transparent electrode 101, and the portion develops black color. Conversely, when a positive charge is injected from the transparent electrode 101 into the electrolytic solution 105, Bi deposited on the transparent electrode 101 is oxidized and dissolved in the electrolytic solution 105, and the portion is decolored. .

  Theoretically, the larger the area of the display segment portion 115, the larger the amount of deposited metal, so that more negative charges must be injected into the display segment portion 115. .

  Here, conventionally, a voltage pulse such as a rectangular wave voltage pulse, a triangular wave, or a sawtooth wave is applied to the transparent electrode 101 in order to inject charges into the display segment portion 115. For example, when a rectangular wave of constant voltage and constant time is applied to the transparent electrode 101, if the influence of the resistance of the wiring electrode 101b can be ignored, the resistance value in the display segment 115 during color development may be inversely proportional to the segment area. know.

Therefore, when a constant voltage is applied between the transparent electrode 101 and the conductive substrate 103 in the display segment portion 115 for a certain period of time, the magnitude of the current flowing between the transparent electrode 101 and the conductive substrate 103 in the display segment portion 115. Is proportional to the segment area, a predetermined charge amount substantially proportional to the segment area can be applied to the display segment portion 115 regardless of the area. Here, the amount of charge necessary for proper color development of the electrochromic display device is about 30 mC / cm ² when an electrolytic solution containing silver or bismuth as a main material is used.

On the other hand, the resistance value in the display segment portion 115 at the time of erasing is also inversely proportional to the segment area. It is known that the current decreases. At the time of erasing, in consideration of the change of the resistance value, a positive charge of substantially the same amount as the negative charge injected at the time of color development is injected into the display segment portion 115.
Annual Meeting of the Imaging Society of Japan (Japan Hard Copy 2004) June 4 TRACK1A-27 (electronic paper using organic-inorganic nanocomposites)

  The conventional electrochromic display device as described above has the following problems. In general, since ITO or the like as the transparent electrode 101 has a high resistivity, the individual display segment portions 115 that perform color development or decoloration have unevenness in the distribution of injected charges within the segments. Further, as in the conventional configuration described above, in the case where the conductive substrate 103 is a flat electrode made of a flat metal, the transparent segment 101 has a portion that is designated as the display segment 115. More negative or positive charges move from the electrolytic solution 105 toward the edge than near the center. For this reason, the edge portion repeats coloring and decoloring excessively compared with the central portion, and as a result, the metal deposited on the edge portion on the transparent electrode disappears from the transparent electrode 101. Inconveniences such as failure to occur.

  The present invention has been made in view of the above circumstances, and reduces the deviation of the amount of deposited metal between the vicinity of the center portion of the display electrode portion and the edge portion. Although it is possible to reduce metal precipitation, it is impossible to say that it is possible to prevent 100% of the amount of metal precipitation, so the expression has been changed to "reducing.") An object is to provide a display device.

  In order to achieve the above object, an electrochromic display device according to an aspect of the present invention corresponds to the back electrode portion including at least one back electrode portion made of a first conductive member and the second conductive member. At least one display electrode part, and an electrolyte solution in which a metal disposed between the back electrode part and the display electrode part is dissolved, the back electrode part and the display corresponding to the back electrode part The electrode part is overlapped over the entire back electrode part.

  According to the present invention, the size and shape of the back electrode portion are reduced to the size and shape of the display electrode portion, so that the metal between the vicinity of the center portion of the display electrode portion and the edge portion can be reduced. It is possible to provide an electrochromic display device capable of reducing the uneven deposition amount.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing the configuration of the electrochromic display device according to the first embodiment of the present invention. The electrochromic display device according to the first embodiment includes a segment type display panel 1, a plurality of constant current application circuits 2A, 2B, 2C,..., A segment profile memory 3, and a system interface 4. Yes. Here, the display panel 1 has a plurality of display segment portions 20A, 20B, 20C,. Here, the total number of the constant current application circuits 2A, 2B, 2C,... Is the same as the total number of the plurality of display segment portions 20A, 20B, 20C,. The plurality of display segment portions 20A, 20B, 20C,... And the constant current application circuits 2A, 2B, 2C,.

  In the electrochromic display device according to the first embodiment, the display segment portions 20A, 20B, 20C,... Of the display panel 1 are connected to the constant current application circuits 2A, 2B,. 2C,... Are driven by applying a constant current. Here, the segment profile memory 3 receives the address signal from the system interface 4 and corresponds the current value designation data stored in the address to any one of the display segment portions 20A, 20B, 20C,. To the constant current application circuits 2A, 2B, 2C,. The segment profile memory 3 is preferably a nonvolatile memory such as an EPROM or a flash ROM. By configuring the segment profile memory 3 with a non-volatile memory, the stored contents can be retained even when the circuit is powered off.

  In particular, the current values of the currents applied to the display segment portions 20A, 20B, 20C,... By the constant current application circuits 2A, 2B, 2C,... Are the values stored in the segment profile memory 3. Based on this, the current value is set in proportion to the area of each of the display segment portions 20A, 20B, 20C,.

  The system interface 4 receives a signal corresponding to display or non-display of the display panel 1 from a CPU (not shown), and supplies pulse width designation data to the constant current application circuits 2A, 2B, 2C,. And an address signal corresponding to an address in which current value designation data corresponding to a display segment portion to be colored or erased is stored is output to the segment profile memory 3.

  The display panel 1 includes display electrode portions 21A, 21B, 21C,... And back electrode portions 22A, 22B, 22C,... Included in a plurality of display segment portions 20A, 20B, 20C,. For example, they are arranged as shown in FIG. Here, in FIG. 2, in order to clearly show the planar size and shape of the display electrode portion and the back electrode portion, only the display electrode portion and the back electrode portion described above are shown in the configuration of the display panel 1. The description of wiring electrodes described later connected to the individual display segment portions and the insulating films described later formed on the wiring electrodes is omitted.

  Hereinafter, with reference to FIG. 2, a configuration that is unique to the electrochromic display device according to the first embodiment and is essential to solve the above-described problem will be described.

  First, as shown in FIG. 2, the display panel 1 of the electrochromic display device according to the first embodiment includes eight display segment portions 20A to 20G for displaying display patterns such as alphabets and numbers. It is arranged in a letter shape. The display segment portions 20A to 20G are light-transmitting and conductive conductive films (second conductive members) made of indium tin oxide (ITO) or the like formed on the entire surface of a glass substrate 26 described later. Display electrode portions 21A to 21G (parts indicated by broken lines in FIG. 2) formed by patterning the substrate by etching or the like, and a flat conductive substrate (first conductive member) made of a conductive metal such as copper And back electrode portions 22A to 22G (portions indicated by solid lines in FIG. 2) formed as electrodes corresponding to the display electrode portions 21A to 21G.

  As shown in FIG. 2, in the display segment portions 20A to 20G in the electrochromic display device according to the first embodiment, the back electrode portions 22A to 22G and the display electrode portions 21A to 21G corresponding to the back electrode portions 22A to 22G, respectively. However, the back electrode portions 22A to 22G are overlapped over the entire surface, and the sizes of the back electrode portions 22A to 22G are smaller than the display electrode portions 21A to 21G. Further, the shapes of the back electrode portions 22A to 22G are similar to the shapes of the display electrode portions 21A to 21G, respectively.

  Hereinafter, with reference to FIG. 3, a wiring example of the display electrode portions 21A to 21G in the electrochromic display device according to the first embodiment will be described.

  As shown in FIG. 3, the strip-shaped portions respectively connected to the display electrode portions 21 </ b> A to 21 </ b> G provided in an 8-character shape are the wiring electrode portions 10 </ b> A to 10 </ b> G. In the electrochromic display device according to the first embodiment, the wiring electrode portions 10A to 10G are formed by patterning the same conductive film as the display electrode portions 21A to 21G.

  The display electrode portions 21A to 21G are connected to driving drivers (not shown) for driving the display electrode portions 21A to 21G provided outside the display panel by the wiring electrode portions 10A to 10G, respectively. .

  Hereinafter, with reference to FIG. 4 showing a cross-sectional view of the display panel of the electrochromic display device in the IV-IV line shown in FIG. 3, the configuration of the display segment portion of the electrochromic display device according to the first embodiment Will be explained.

  First, as shown in FIG. 4, in the electrochromic display device according to the first embodiment, a glass substrate 26 and a flat conductive substrate (first conductive member) made of a conductive metal such as copper. 28) are arranged in parallel.

  On the surface of the glass substrate (second insulating member) 26 facing the conductive substrate 28, transparent electrodes such as indium tin oxide (ITO) are provided on the display electrode portions 21B and 21F and the wiring electrode portions 10G and 10G. Are formed in a predetermined pattern. Further, on the glass substrate 26 between the display electrode portion 21B and the wiring electrode portion 10G, on the glass substrate 26 between the display electrode portion 21F and the wiring electrode portion 10G, and display electrode portions 21B and 21F. A resist (second insulating film) 23a having openings 231 and 231 and having insulating properties is provided on the glass substrate 26 and on the wiring electrode portions 10G and 10G in between. .

  Here, of the conductive film formed and patterned on the glass substrate, the portions exposed by the openings 231 and 231 are the display electrode portions 21B and 21F. The display electrode portions 21B and 21F are connected to the wiring electrode portions 10B and 10F, respectively, as shown in FIG. 3, and the wiring electrode portions 10B and 10F are connected to the wiring electrode portions 10B and 10F, respectively. The constant current application circuits 2B and 2F are connected to the wiring electrode portions 10B and 10F, respectively, and a constant current is applied. The other display electrode portions 21A, 21C, 21D, 21E, and 21G have the same configuration as the display electrode portions 21B and 21F described above.

  In addition, the conductive substrate 28 is provided with openings 232, 232,... At one or two or more locations (two locations in FIG. 4) on the surface facing the glass substrate 26, and has an insulating property ( (First insulating film) 23b is provided. Here, portions of the conductive substrate 28 exposed by the openings 232 and 232 serve as back electrode portions 22B and 22F. The back electrode portions 22B and 22F are connected to a grounding circuit (not shown) connected to the conductive substrate 28 via the conductive substrate 28, and the potential is set to the ground potential. ing. The other back electrode portions 22A, 22C, 22D, 22E, and 22G have the same configuration as the back electrode portions 22B and 22F described above.

  Further, an electrolytic solution 24 in which a metal is dissolved is held between the display electrode portions 21B and 21F and the back electrode portions 22B and 22F, and the held electrolytic solution 24 is in the display panel 1. The glass substrate 26 and the conductive substrate 28 are sealed with a sealing material 25. Here, bismuth (Bi), silver (Ag), or the like is suitable as the metal to be dissolved in the electrolytic solution 24. Moreover, as a liquid for dissolving Bi, various things, such as a odorous acid, hydrochloric acid, an iodic acid, can be used, for example. Furthermore, instead of holding the electrolytic solution 24 as it is, a wet cake sheet 241 holding the electrolytic solution 24 may be provided. In addition, the material shown above is an example and it is needless to say that it can be appropriately changed according to the implementation conditions.

  In the display segment portion of the electrochromic display device according to the first embodiment, the back electrode portions 22A to 22G and the corresponding display electrode portions 21A to 21G correspond to the back electrode portions 22A to 22G, respectively. The back electrode portions 22A to 22G are similar in size and shape to the corresponding display electrode portions 21A to 21G. Here, the broken lines in FIG. 4 indicate the difference in size between the back electrode portions 22B and 22F and the display electrode portions 21B and 21F.

  Here, the principle of coloring and decoloring of the electrochromic display device according to the first embodiment will be described. When negative charges are injected into the display segment portions 20A to 20G having the above-described configuration by applying a voltage between the display electrode portions 21A to 21G and the corresponding back electrode portions 22A to 22G, Bi ions in the electrolytic solution 24 are reduced and deposited on the display electrode portions 21A to 21G. As a result, the display segment portion is colored black. Conversely, when positive charges are injected into the display segment parts 20A to 20G, Bi deposited on the display electrode parts 21A to 21G is oxidized and dissolved in the electrolyte. As a result, the display segment portion that has been colored black is erased. The constant current application circuits 2A, 2B, 2C,... Are provided in the same number as the number of display segment portions corresponding to each of the plurality of display segment portions constituting the display panel 1. By applying a current, a negative or positive charge for injecting or decoloring the display segment portion is injected.

  Since the electrochromic display device according to the first embodiment is configured as described above, among the charges in the electrolytic solution 24, the charges existing outside the back electrodes 22A to 22G in FIG. Since it is possible to suppress the movement of the charges to the display electrode portions 21A to 21G or the opposite direction, it is possible to suppress the movement between the vicinity of each central portion of the display electrode portions 21A to 21G and each edge portion. The deviation of the amount of deposited metal can be reduced.

  As described above, according to the electrochromic display device according to the first embodiment, the electrochromic display device that can reduce the deviation of the amount of deposited metal between the vicinity of the center portion and the edge portion of the display electrode. As a result, it is possible to suppress the occurrence of a problem that the metal deposited on the portion corresponding to the edge portion of the electrolysis solution cannot be completely removed.

  In the electrochromic display device according to the first embodiment as described above, the shape, number, and arrangement of the display segment portions as shown in FIG. Of course, it can be appropriately changed according to the required specifications.

  Also in the electrochromic display device according to the modification described below, the above-described effects of the present invention can be obtained in the same manner.

[Modification]
Hereinafter, modifications of the electrochromic display device according to the first embodiment will be described.

  FIG. 5 is a plan view showing an arrangement configuration example of the back electrode portions 221A to 221G of the display segment portions 20A to 20G in the electrochromic display device according to this modification. As shown in FIG. 5, in this modification, the back electrode portions 221A to 221G are arranged in an eight-character shape. FIG. 6 is a cross-sectional view taken along the line VI-VI shown in FIG. 5 in the display panel 101 of the electrochromic display device according to this modification. Here, for convenience of explanation, components that are the same as those in the first embodiment are given the same reference numerals in principle, and descriptions of these common components are omitted as appropriate.

  The electrochromic display device according to this modified example has one or more back electrode portions (in FIG. 6) made of copper on an insulating substrate (first insulating member) 29 made of an insulating material such as glass or ceramic. Back electrode portions 221B and 221F) are formed. Similarly to the first embodiment described above, the back electrode portions 221A to 221G and the display electrode portions 21A to 21G corresponding to the back electrode portions 221A to 221G overlap each other over the entire back electrode portions 221A to 221G, In addition, the size of each of the back electrode portions 221A to 221G is formed smaller than that of the display electrode portions 21A to 21G. Further, the shapes of the back electrode portions 221A to 221G are similar to the display electrode portions 21A to 21G, respectively. The back electrode portions 221A to 221G are formed by patterning a conductive conductive film (first conductive member) made of copper formed on the entire surface of the insulating substrate 29 by etching or the like. At this time, as shown in FIG. 5, the back electrodes 221A to 221G are electrically connected to each other by back electrode wiring electrodes 281 formed simultaneously with the back electrode portions 221A to 221G.

  The back electrode portions 221A to 221G are connected to a grounding circuit (not shown) by wiring electrodes 281 and the potential thereof is set to the ground potential.

  The electrochromic display device according to this modification is configured as described above, so that the vicinity of each central portion and each edge portion of the display electrode portions 21A to 21G are the same as the electrochromic display device according to the first embodiment described above. The deviation of the amount of deposited metal between the two can be reduced.

[Second Embodiment]
Hereinafter, an electrochromic display device according to a second embodiment of the present invention will be described.

  FIG. 7 is a plan view showing an arrangement configuration example of the back electrode portions 222A to 222G of the display segment portions 30A to 30G in the electrochromic display device according to the second embodiment. FIG. 8 is a cross-sectional view taken along line VIII-VIII shown in FIG. 7 in the display panel 102 of the electrochromic display device according to the second embodiment.

  In the electrochromic display device according to the second embodiment, as shown in FIG. 8, the electrode portion for display is made of indium tin oxide (ITO) or the like formed on the entire surface of the glass substrate 26. Each part of the conductive film (second conductive member) 31 having translucency and conductivity is used. An insulating substrate 29 is disposed opposite to the glass substrate 26, has openings 233, 233,... On the surface of the conductive film 31 facing the insulating substrate, and has an insulating property 23c (first resist). A second insulating film) is provided. Here, portions of the conductive film 31 formed on the glass substrate that are exposed by the openings 233, 233,... Are display electrode portions 31A to 31G, respectively. The display electrode portions 31B and 31F are connected to a grounding circuit (not shown) connected to the conductive film 31 through the conductive film 31, and the potential thereof is set to the ground potential. .

  As shown in FIG. 7, each of the back electrode portions 222A to 222G is driven by a driver (non-driver) for driving the back electrode wiring electrodes 282A to 282G simultaneously with the back electrode portions 222A to 222G. And can be driven individually.

  Here, as in the first embodiment, the back electrode portions 222A to 222G and the display electrode portions 31A to 31G corresponding to the back electrode portions 222A to 222G extend over the entire back electrode portions 222A to 222G. In addition, the back electrode portions 222A to 222G are formed to be smaller than the display electrode portions 31A to 31G. Further, the shapes of the back electrode portions 222A to 222G are similar to the display electrode portions 31A to 31G, respectively. The broken lines in FIG. 6 indicate the difference in size between the back electrode portions 222B and 222F and the display electrode portions 31B and 31F. With this configuration, it is possible to reduce the uneven deposition amount of metal between the vicinity of each central portion and each edge portion of the display electrode portions 31A to 31G.

  The electrochromic display device according to the second embodiment includes a display segment having the above-described configuration by applying a voltage between the display electrode portions 31A to 31G and the corresponding back electrode portions 222A to 222G. When negative charges are injected into the parts 30A to 30G, Bi ions in the electrolytic solution 24 are reduced and deposited on the display electrode parts 21A to 21G. As a result, the display segment portion is colored black. Conversely, when positive charges are injected into the display segment parts 20A to 20G, Bi deposited on the display electrode parts 21A to 21G is oxidized and dissolved in the electrolyte. As a result, the display segment portion that has developed black color is erased.

  As described above, according to the second embodiment, in addition to the same effects as the electrochromic display device according to the first embodiment, an electrochromic display device having the following effects can be provided. .

  That is, according to the electrochromic display device according to the second embodiment, a part of the conductive film 31 formed on the entire surface of the glass substrate 26 is used as the display electrode portions 31A to 31G, so that it can be compared with the conventional case. Further, the resistance of the wiring electrode portions 10A to 10G connected to the display electrode portions 31A to 31G made of a conductive film having a high resistivity such as ITO can be greatly reduced, and the power consumption for driving can be reduced. Can be reduced.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention.

  For example, in the electrochromic display device according to each of the above-described embodiments, the back electrode part constituting each display segment part and each display electrode part corresponding to each overlap each other over the entire back electrode part. In addition, the size of each back electrode portion is formed smaller than that of the display electrode portion, and the shape of the back electrode portion is similar to each display electrode portion. However, the configuration is not limited to the above-described configuration, and each back electrode portion may be overlapped with each corresponding display electrode portion, and the size and shape of each back electrode portion are the same as the size of each corresponding display electrode portion. It is good also as a shape. Also in this case, it is possible to reduce the deviation of the amount of deposited metal between the vicinity of each central portion of each display electrode portion and each edge portion, as compared with the conventional case.

  Further, in each of the above-described embodiments, the shape of each back electrode portion is similar to the shape of each display electrode portion corresponding thereto, but the overlap between each back electrode portion and each display electrode portion corresponding thereto. In the case where the above-described conditions regarding the configuration to be performed and the size of each back electrode part are satisfied, their shapes do not necessarily have to be similar to each other.

  Further, in each of the above-described embodiments, instead of holding an electrolytic solution in which a metal is dissolved as an electrolyte between the display electrode portion and the back electrode portion, an electric field solution in which a viologen compound is dissolved as an electrolyte is held. May be. In this case as well, as in the above-described embodiments, display can be performed by injecting a charge into the electrolysis solution to deposit a dye on a predetermined electrode portion by a reduction oxidation reaction.

  Furthermore, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be extracted as an invention.

1 is a block diagram showing a configuration of an electrochromic display device according to a first embodiment of the present invention. The figure which shows the example of arrangement | positioning structure of the display segment part in the electrochromic display device which concerns on 1st Embodiment of this invention. The top view which shows the example of arrangement configuration of the display electrode part of the display segment part in the electrochromic display device which concerns on 1st Embodiment of this invention. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. The top view which shows the example of arrangement | positioning structure of the back electrode part of the display segment part in the electrochromic display device which concerns on the modification of 1st Embodiment of this invention. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5. The top view which shows the example of arrangement | positioning structure of the back electrode part of the display segment part in the electrochromic display device which concerns on 2nd Embodiment of this invention. FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7. Sectional drawing of the display panel in the conventional common electrochromic display device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,101,102 ... Display panel, 3 ... Segment profile memory, 4 ... System interface, 10, 10A-10G ... Wiring electrode part, 20A-20G, 201A-201G, 30A-30G ... Display segment part, 21A-21G, 31A to 31G ... display electrode part, 22A to 22G, 221A to 221G, 222A to 222G ... back electrode part, 23a, 23c ... resist (second insulating film), 23b ... resist (first insulating film), 231, 233 ... opening (second opening), 232 ... opening (first opening), 24 ... electrolyte, 25 ... sealing material, 26 ... glass substrate (second insulating member), 28 ... conductive Conductive substrate (first conductive member), 28A to 28G, 281, 282A to 282G ... wiring electrode part, 29 ... insulating substrate (first insulating part) ), 31 ... conductive film (second conductive member).

Claims (9)

At least one back electrode portion made of the first conductive member;
At least one display electrode portion made of a second conductive member and corresponding to the back electrode portion;
An electrolyte solution in which an electrolyte disposed between the back electrode portion and the display electrode portion is dissolved;
The electrochromic display device, wherein the back electrode portion and the display electrode portion corresponding to the back electrode portion are overlapped over the entire back electrode portion. The electrochromic display device according to claim 1.
The size of the at least one back electrode part is the same as or smaller than that of the at least one display electrode part corresponding to the at least one back electrode part. The electrochromic display device according to claim 1.
The shape of the at least one back electrode part is similar to the shape of the at least one display electrode part corresponding to the at least one back electrode part. The electrochromic display device according to claim 1.
A first insulating film having a first opening in each of the first conductive member facing the at least one display electrode portion is formed on the first conductive member;
The at least one back electrode portion corresponding to the at least one display electrode portion includes a portion corresponding to the one first opening in the first conductive member. The electrochromic display device according to claim 1.
Furthermore, a first insulating member having insulating properties is provided,
The first conductive member is formed on a surface facing the back electrode portion on the first insulating member. The electrochromic display device according to claim 1.
A second insulating film having one second opening at a portion facing the at least one back electrode portion in the second conductive member is formed on the second conductive member;
The at least one surface electrode portion corresponding to the at least one back electrode portion includes a portion corresponding to the one second opening in the second conductive member. The electrochromic display device according to claim 6,
A plurality of the display electrode portions are provided, and the plurality of display electrode portions are connected to each other. The electrochromic display device according to claim 6,
Furthermore, a second insulating member having insulating properties is provided,
The second conductive member is formed on a solid surface on a surface facing the back electrode portion on the second insulating member. The electrochromic display device according to claim 1.
By applying a voltage between the at least one back electrode part and the display electrode part corresponding to the at least one back electrode part to inject electric charge into the electrolyte solution, the electrolyte in the electrolyte solution It is characterized by precipitation or dissolution.

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