JP2004226735A - Electrochromic display and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrochromic display capable of reducing crosstalks while achieving cost reduction and high resolution. <P>SOLUTION: The spreading electric field to an adjacent electrode is prevented by providing a separator having a large number of through holes between upper and lower substrates and filling the through holes in the separator with an electrolyte. As a method for manufacturing the structure, a method for curing a resin material in a perforated state of the raw material of the separator, a photolithography method, a patterning method e.g. a screen printing method, an ink jet method, etc. and the like are used. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device, and more particularly to a display device that performs display with an electrochromic display element using an electrochemical oxidation-reduction reaction, and a method for manufacturing the same.
[0002]
[Prior art]
A representative example of an element that performs display using an electrochemical redox reaction is an electrochromic display element. A configuration of a general electrochromic display element is shown in FIG. As shown, a pair of substrates 901 on which a transparent electrode 902 is formed, an electrochromic material 103 formed on the transparent electrode of one substrate, and an electrolyte 106 are provided. As a method for displaying an arbitrary pattern on an electrochromic display element, a matrix driving method is used in which a plurality of striped transparent electrodes are formed on each of an upper substrate and a lower substrate, and the electrodes are arranged so as to face and intersect each other. It is common to use. By selecting one of the upper electrode and one of the lower electrodes and applying an appropriate voltage between them in the electrochromic device having such a configuration, the electrochromism phenomenon is applied only to the pixel portion where the selected electrodes intersect. Coloring and decoloring can be caused. Such a method is not limited to an electrochromic display element, but is also performed by a liquid crystal display element or the like, and is known as simple matrix driving. However, in the case of simple matrix driving, since the electric field also extends around the area to which the voltage is applied, other pixels in the vicinity of the target are colored / decolored (crosstalk) ). Conventionally, as a method for eliminating crosstalk in an electrochromic device, a switching device is connected to one of the pixels, and only a target pixel is electrically connected (active matrix driving). (For example, see Patent Document 1). In addition, a configuration is known in which an electrochromic solution is filled in a groove provided in a substrate so that an electric field does not spread outside a target pixel (see, for example, Patent Document 2).
[0003]
[Patent Document 1]
JP-A-56-165186 (2nd page, FIG. 2).
[0004]
[Patent Document 2]
JP-A-8-137712 (pages 3 and 4).
[0005]
[Problems to be solved by the invention]
However, there are several problems with the conventional methods. First, in the case of active matrix driving using a switching element as described in Patent Document 1, a switching element for driving a pixel must be provided for each pixel. There exists a subject that manufacturing cost increases. In addition, a region for forming the switching element has to be provided in the vicinity of the pixel, and there is a problem that an area that can be used for display is relatively reduced. On the other hand, as described in Patent Document 2, by forming an electrode inside a recess provided in a substrate, a method for forming a substrate shape so that an electric field does not spread other than the target pixel is achieved. Therefore, it is difficult to make the pixel small in order to obtain the above. In addition, since a photolithography technique often used as a patterning method is a technique for a flat substrate, it is difficult to apply the photolithography technique when forming an electrode in a recess, and a special patterning method is required. This can be a factor that increases manufacturing costs. The present invention provides an electrochromic display device that can be manufactured at low cost without generating crosstalk even with simple matrix driving, and a manufacturing method thereof.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the electrochromic display device of the present invention has the following configuration. That is, a substrate provided with an electrode, an electrochromic material layer formed on the electrode, and a counter substrate on which a counter electrode is formed, and the electrode and the counter electrode cross each other through the electrochromic material layer In the electrochromic display device constituting the pixel, an electrolyte is provided between the counter electrode and the electrochromic material layer in the pixel region, and the electrolyte is provided not to contact an adjacent electrode. Yes. Furthermore, this electrolyte is provided in a partial region of the pixel.
[0007]
The electrochromic display device of the present invention includes a substrate provided with an electrode, an electrochromic material layer formed on the electrode, a counter substrate on which a counter electrode is formed, a counter electrode, and an electrochromic material layer. The separator includes a separator in which a large number of fine through holes are formed, and an electrolyte filled in the through holes. Here, the diameter of the through hole is smaller than the width of the electrode and the counter electrode, and smaller than the distance between these electrodes. Alternatively, each of the through holes was arranged so as to contact only a single electrode and a single counter electrode.
[0008]
The method for manufacturing an electrochromic display device according to the present invention includes a step of forming an electrode on a first substrate, a step of forming an electrochromic material layer on the electrode, and a plurality of layers on the electrochromic material layer. A separator layer forming step of forming an insulating resin layer having fine through holes, an electrolyte filling step of filling the through holes with an electrolyte, a step of forming a counter electrode on the counter substrate, an electrode and a counter electrode Are arranged so as to face each other through the electrochromic material layer, and include a step of bringing the first substrate and the counter substrate into close contact so that the electrode and the counter electrode cross each other.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A schematic configuration of the electrochromic display device of the present invention is schematically shown in FIG. As shown in the figure, an electrode 102 is formed on a substrate 101, and an electrochromic material 103 is formed on the surface of the electrode 102. On the other hand, the counter substrate 108 provided with the counter electrode 107 is disposed to face the substrate 101 so that the electrode surface is on the inner side. Further, a separator 104 having a plurality of minute through holes 105 formed thereon is in close contact therewith. The through hole 105 of the separator 104 is filled with an electrolyte 106. The electrolyte 106 may be a liquid electrolyte, a gel electrolyte, or a solid electrolyte. On the separator 104, a counter substrate 108 on which a counter electrode 107 is formed is provided. A portion where the electrode 102 and the counter electrode 107 intersect functions as a display pixel. When attention is paid to a portion between the electrode forming one display pixel and the counter electrode, a portion where the electrolyte is provided and a portion where the electrolyte is not provided are mixed. That is, each electrolyte column is not formed across adjacent display pixels in one display pixel. Furthermore, the size of each through-hole 105 provided in the separator is smaller than the distance between the electrodes 102 and the counter electrode 107 or is arranged so as to contact only the single electrode 102 and the single counter electrode 107. The electrolyte 106 filled in the through hole 105 is in a state of being electrically insulated from other adjacent electrodes.
[0010]
Next, in the method for manufacturing an electrochromic display element according to the present invention, a step of forming a plurality of electrodes 102 on the first substrate 101, a step of forming an electrochromic material 103 on the electrodes 102, and an electrochromic material 103 A separator 104 forming step of forming an insulating resin layer having a plurality of fine through-holes 105 thereon, an electrolyte filling step of filling the fine through-holes 105 with an electrolyte 106, a resin layer and a plurality of counter electrodes 107 The method includes a step of closely attaching the second substrate 108 on which the electrode 102 and the counter electrode 107 are orthogonal to each other.
[0011]
Then, this separator forming step is a step of applying a liquid resin material and curing the resin material in a state where a jig having fine irregularities is pressed thereon, or a photolithographic method using a photosensitive material. Thus, it is formed by either a step of forming an array pattern of fine through-holes or a step of forming an array pattern of through-holes using a method such as screen printing or inkjet.
[0012]
In the second method for manufacturing an electrochromic display element according to the present invention, a step of forming a plurality of electrodes 102 on the first substrate 101, a step of forming an electrochromic material 103 on the electrodes 102, A separator bonding step for bonding a separator 104 having a large number of minute through-holes 105 on the chromic material 103, an electrolyte filling step for filling the minute through-holes 105 with an electrolyte 106, a separator 104 and a counter electrode 107 And a step of closely contacting the second substrate 108 on which the electrode 102 and the counter electrode 107 are orthogonal to each other.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
Example 1
A schematic configuration of the electrochromic display element of this example is schematically shown in FIG. A specific configuration of the electrochromic display element will be described with reference to FIG. As shown in the figure, an electrode 102 is formed on a substrate 101, and an electrochromic material 103 is formed on the surface of the electrode 102. Further, a separator 104 having a plurality of minute through holes 105 formed thereon is in close contact therewith. The through hole 105 of the separator 104 is filled with an electrolyte 106. The electrolyte 106 may be a liquid electrolyte, a gel electrolyte, or a solid electrolyte. On the separator 104, a counter substrate 108 on which a counter electrode 107 is formed is provided.
[0015]
In this embodiment, a glass substrate is used as the substrate 101, indium oxide-tin oxide (ITO) is used as the electrode material, and the electrodes are formed in stripes with minute intervals. This electrode is a low electrode. On the row electrode, a nickel oxide thin film is formed as the electrochromic material 103 only on the electrode. Sputtering and photolithography were used to form the nickel oxide thin film on the row electrode. In addition to the sputtering method, the nickel oxide thin film is directly formed by vacuum deposition, sol-gel method, screen printing method, ink jet method, etc. A method of forming a nickel nickel thin film by a method such as thermal oxidation after forming a thin film of metal nickel or nickel hydroxide by electroplating or the like can be used. In particular, in the case of a screen printing method, an ink jet method, an electroplating method, or the like, the patterning step by photolithography can be omitted.
[0016]
On the electrochromic material 103, a separator 104 having a large number of through holes 105 is formed in close contact, and the through holes 105 are filled with a 1 mol / l sodium hydroxide aqueous solution as an electrolyte 106. As a material for the separator 104, a material having electrical insulation and visible light transmission properties such as polyethylene terephthalate can be used. The through hole 105 included in the separator 104 is separated from the adjacent through hole by a partition wall, and has a structure that penetrates from the front surface to the back surface of the separator 105. Further, a counter substrate having a counter electrode 107 made of indium oxide-tin oxide (ITO) is in close contact with the side opposite to the substrate 101 of the separator 104. Here, the counter electrode 107 is a column electrode formed in a stripe shape with a minute interval, and glass is used as the material of the counter substrate 108. The direction of each substrate is such that the substrate 101 and the counter substrate 108 are aligned so that the row electrode and the column electrode are orthogonal to each other.
[0017]
Here, the size of the through hole 105 is smaller than the width of the row electrode and the column electrode, and it is desirable that a plurality of through holes 105 exist in the region of one row electrode and the column electrode. Furthermore, it is necessary that one through-hole 105 covers only a single row electrode or a single column electrode, not a plurality of row electrodes or a plurality of column electrodes. As a method for realizing such a structure, the arrangement pattern of the through holes 105 on the separator 104 is matched with the pattern of the row electrode and the column electrode, or the size of the through hole 105 is made smaller than the interval between the row electrode and the column electrode. A method such as keeping it is conceivable.
[0018]
In such a structure, when a predetermined voltage is applied to a specific single row electrode and a specific single column electrode, the penetration that is in contact with both the row electrode and the column electrode to which the voltage is applied An electric field is applied only to the electrolyte present in the hole 105, and a change in color tone from transparent to colored or from colored to transparent occurs due to an electrochemical reaction in the nickel oxide thin film on the low electrode to which a voltage is applied. Since the electrolyte in each through hole is insulated and segmented by the partition walls of the separator 104, the electric field does not spread to other portions adjacent to the electrode to which a voltage is applied, and crosstalk does not occur. By applying this to all the intersections between the row electrodes and the column electrodes, it is possible to form an arbitrary image pattern with high definition.
[0019]
In this embodiment, glass substrates are used as the substrates 101 and 108, but the structure of the present invention is not limited to this, and other materials can be used. Specifically, any material can be used as long as both the substrates 101 and 108 have electrical insulation and at least one of the substrates 101 and 108 transmits visible light. Similarly, as materials for the row electrode and the column electrode, materials other than indium oxide-tin oxide alloy are used as long as they have electrical conductivity and at least one of them has electrical conductivity. It is possible. In addition, although nickel oxide is used as the electrochromic material 103, even when an inorganic electrochromic material such as tungsten oxide, iridium oxide, cobalt oxide, Prussian blue, or an organic electrochromic material typified by a viologen compound is used. The same effect can be obtained.
[0020]
In this embodiment, the electrochromic material 103 is formed on the row electrode. However, the electrochromic material 103 may be formed on the column electrode. In addition to the aqueous solution, the electrolyte may be an organic liquid, a solid electrolyte, or a gel. An electrolyte (polyethylene oxide, polyacrylonitrile or the like impregnated with an electrolyte) may be used.
[0021]
(Example 2)
The structure of the electrochromic display element of this embodiment is schematically shown in FIG. The present embodiment is different from the first embodiment in that the electrochromic material 103 is formed so as to cover the entire substrate 101. Since other basic configurations are the same as those of the first embodiment, the details are omitted. As illustrated, an electrochromic material 103 is provided so as to cover the entire electrode 102 on the substrate 101. In this embodiment, since it is not necessary to pattern the electrochromic material 103 in accordance with the shape of the electrode 102, it can be manufactured at a lower cost than the first embodiment. A nickel oxide thin film is used as the electrochromic material 103. As a method of forming a nickel oxide thin film, a method of directly forming a nickel oxide thin film by a sputtering method, a vacuum deposition method, a sol-gel method, a screen printing method, an ink jet method or the like, or a metal nickel or nickel hydroxide by electroplating or the like There is a method of forming a nickel oxide thin film by a method such as thermal oxidation.
[0022]
A separator 104 having a large number of through-holes 105 formed on the electrochromic material 103 is in close contact therewith, and the through-hole 105 is filled with an electrolyte 106.
[0023]
(Example 3)
In this embodiment mode, an example in which color display is performed using the electrochromic display element of the present invention will be described. FIG. 3 is a schematic diagram showing the structure of the electrochromic display element for color display of the present invention. A glass substrate is used as the first substrate 101, and a color filter 301 is formed on which a light transmitting material of red (R), green (G), and blue (B) is arranged in a stripe shape. Has been. Furthermore, on each stripe of the color filter 301, an electrode (electrode 102) is formed of indium oxide-tin oxide (ITO). On the electrode 102, a nickel oxide thin film is formed as the electrochromic material 103 only on the electrode. As a method for forming the nickel oxide thin film on the electrode 102, the methods described in Example 1 and Example 2 can be used. Further, the nickel oxide thin film may be formed on the entire first substrate 101 as shown in the second embodiment.
[0024]
A separator 104 having a large number of through-holes 105 is formed in close contact with the electrochromic material 103, and the through-hole 105 is filled with a 1 mol / l sodium hydroxide aqueous solution as the electrolyte 106. As a material for the separator 104, a material having electrical insulation and visible light transmission properties such as polyethylene terephthalate can be used. The through-hole 105 included in the separator 104 is separated from the adjacent through-hole 105 by a partition wall, and is configured to penetrate from the front surface to the back surface of the separator 105. Further, on the opposite side of the first substrate 101 of the separator 104, a second glass substrate 108 in which a plurality of indium oxide-tin oxide (ITO) electrodes (counter electrode 107) are formed in a stripe shape with a minute interval. Are closely attached. At this time, the first substrate 101 and the second substrate 108 are aligned in a direction in which the electrode 102 and the counter electrode 107 are orthogonal to each other.
[0025]
The size and arrangement of the through holes 105 must satisfy the conditions described in the first and second embodiments also in the present embodiment.
[0026]
Further, a back plate 302 is installed on the back surface of the second substrate 108. The back plate 302 includes either a reflection plate that reflects light or a backlight that emits white light, but is not essential for the configuration of the electrochromic display element of the present invention. Further, the second substrate 108 may include the function of the back plate 302.
[0027]
In such a structure, when a predetermined voltage is applied to the specific single electrode 102 and the specific single counter electrode 107, the through-hole that is in contact with both the electrode 102 to which the voltage is applied and the counter electrode 107 is applied. An electric field is applied only to the electrolyte 106 existing in the hole 105, and the nickel oxide thin film on the electrode 102 to which a voltage is applied changes from transparent to colored or changes in color from colored to transparent due to an electrochemical reaction.
[0028]
When the back plate 302 is a reflecting plate, the light incident from the first substrate 101 side reaches the nickel oxide thin film through the color filter 301. When the nickel oxide thin film is in a transparent state, the light of any color of RGB passes through the color filter 301 as it is, passes through the nickel oxide thin film, is reflected by the back plate 302, and is outside the first substrate 101. Return to (ON state). However, when the nickel oxide thin film is in a colored state, the nickel oxide thin film has a color close to black in the colored state, so that light in that portion is absorbed by the nickel oxide thin film, and the light of that color is the first color. It does not return to the outside of one substrate 101 (OFF state). As described above, by changing the ON / OFF state of RGB for each pixel, an arbitrary color pattern can be displayed.
[0029]
Similarly, when the back plate 302 is a backlight, when the nickel oxide thin film is in a transmissive state, the light emitted from the backlight goes out of the first substrate 101 through the nickel oxide thin film and the color filter 302 (ON state). ) When the nickel oxide thin film is in a colored state, the light in that portion does not go outside the first substrate 101 (OFF state). Therefore, as in the case where the back plate 302 is a reflecting plate, it is possible to change the ON / OFF state of RGB for each pixel, and an arbitrary color pattern can be displayed.
[0030]
In the configuration using such a color filter, when crosstalk occurs, the color blurs or blurs. However, in the electrochromic display element of this example, the nickel oxide thin film is segmented by the partition walls of the separator 104. Therefore, the electric field does not spread to other portions adjacent to the electrode to which the voltage is applied, and crosstalk does not occur. Therefore, such a problem does not occur.
[0031]
In this embodiment, glass substrates are used for the first substrate and the second substrate. However, the configuration of the present invention is not limited to this, and other materials can be used. . Specifically, both the first substrate and the second substrate have electrical insulation, and at least one of the first substrate and the second substrate is a material that transmits visible light. Can be used. Similarly, as the material of the electrode 102 and the counter electrode 107, a material other than an indium oxide-tin oxide alloy is used as long as it has electrical conductivity and at least one of them has electrical conductivity. It is possible. Further, although nickel oxide is used as the electrochromic material, any material can be used as long as it changes in a transparent state ← → black, transparent state ← → white, transparent state ← → reflective state.
[0032]
In this embodiment, the electrochromic material is formed on the electrode 102. However, the electrochromic material may be formed on the counter electrode 107. In addition to the aqueous solution, the electrolyte may be an organic liquid, a solid electrolyte, or a gel. An electrolyte (polyethylene oxide, polyacrylonitrile or the like impregnated with an electrolyte) may be used.
[0033]
Example 4
In this example, a method for manufacturing an electrochromic display device according to the present invention will be described. A manufacturing process of the electrochromic display device of this example is schematically shown in FIG. First, an indium oxide-tin oxide alloy (ITO) layer 402 was formed on a glass substrate 401 as a first substrate by sputtering (FIG. 4B). At this time, film forming conditions were set such that the resistance value was as low as possible and the visible light transmittance was high.
[0034]
Next, after the ITO layer 402 is formed by photolithography to form a pattern of the striped electrode 102 (FIG. 4 (c)), the glass substrate 401 is immersed in a 10% by weight nickel nitrate aqueous solution, and the palladium substrate is placed on the counter electrode. As a result, a voltage of a −1 V vs Ag / AgCl electrode was applied to the entire low electrode 102 to form a nickel hydroxide layer 403 on the surface of the electrode 102 (FIG. 4D). Further, after that, the whole substrate was heat-treated in an oven at 200 ° C. for 1 hour, and the formed nickel hydroxide layer 403 was changed to a nickel oxide layer 404 (FIG. 4E).
[0035]
Subsequently, a separator raw material layer 405 in which an acrylic resin monomer and a curing agent are mixed at an appropriate ratio is applied on the glass substrate 401 with a uniform thickness (FIG. 4F), and then fine protrusions are arranged on one surface. While pressing the perforating jig 406 against the separator raw material layer 405, the separator raw material layer 405 was cured to form the separator 104 (FIG. 4G). The fine protrusion formed on the surface of the punching jig 406 needs to have a diameter smaller than the electrode interval between the electrode 102 and the counter electrode 107 and a height larger than the thickness of the separator raw material layer 404. After curing, the perforating jig 406 was separated from the separator raw material layer 404 to form the separator 104 in which a large number of through holes 105 were formed in a transparent insulating material (FIG. 4H).
[0036]
Subsequently, as the gel electrolyte 407, polyethylene oxide impregnated with 1 mol / l sodium hydroxide was filled in the through-hole 105 on the separator 104 by a casting method (FIG. 4 (i)).
[0037]
On the other hand, in the same manner, the second glass substrate 408 was formed on the substrate by sputtering to form an indium oxide-tin oxide alloy (ITO) layer 402, and then patterned by photolithography to form the counter electrode 107 (FIG. 4 (j)). Here, as in the case of forming the electrode 102, the film forming conditions were set such that the resistance value was as low as possible and the visible light transmittance was high.
[0038]
Finally, the glass substrate 401 and the second glass substrate 408 are superposed in the direction in which the electrode 102 and the counter electrode 107 are orthogonal to each other, and heated to a temperature near the softening point of the acrylic resin while applying pressure, The second glass substrate and the separator 104 were joined to complete the electrochromic display device (FIG. 4 (k)).
[0039]
(Example 5)
In this example, a mode different from the separator forming step of Example 4 in the method for manufacturing an electrochromic display device will be described. FIG. 5 is a diagram showing a separator forming process of the present embodiment.
[0040]
On the glass substrate 401 on which the row electrode 102 and the nickel oxide layer 404 are formed, a separator raw material layer 405 having both visible light region light transmittance and ultraviolet light sensitivity is applied with a uniform thickness (FIG. 5A). . The separator raw material layer 405 may be positive or negative in ultraviolet sensitivity. This separator material layer 405 was exposed through a photomask 501 in which the pattern of the through-hole 105 was formed (FIG. 5B). Through the subsequent development process, a separator 104 having a through hole 105 was formed (FIG. 5C).
[0041]
(Example 6)
In this embodiment, a separator forming step will be described in the method for manufacturing an electrochromic display device. FIG. 6 is a diagram showing a separator forming process of the present embodiment.
[0042]
The glass substrate 401 on which the electrode 102 and the nickel oxide layer 404 were formed was placed on an XY axis stage that can be driven in the XY directions. Furthermore, an ink jet head 602 is installed on the glass substrate 401 so as to oppose (FIG. 6A). Next, the separator raw material layer 405 was formed on the glass substrate 401 by injecting the liquid separator raw material 603 from the inkjet head 602 while moving the glass substrate 401 by the XY axis stage 601. At this time, by controlling the movement of the XY axis stage 601 and the ON / OFF of each nozzle of the inkjet head 602, the pattern of the through hole 105 can be formed simultaneously with the formation of the separator material layer 405. (FIG. 6B). Then, the separator raw material layer 405 was hardened by performing processes such as solvent removal (evaporation), thermal polymerization, and photopolymerization as necessary, and the separator 104 having the through hole 105 on the glass substrate 401 was formed.
[0043]
(Example 7)
In this embodiment, one embodiment of a separator forming process will be described in the method for manufacturing an electrochromic display device. FIG. 7 is a diagram showing a separator forming process of the present embodiment.
[0044]
On the glass substrate 401 on which the electrode 102 and the nickel oxide layer 404 are formed, a screen plate 702 whose through hole portion is masked is placed, and a separator material 604 is placed on the screen plate 702 (FIG. 7A )). Thereafter, the separator raw material 604 was transferred onto the glass substrate 401 through the pattern opening of the screen plate 702 while the separator raw material 603 was leveled with the squeegee 701, thereby forming the separator raw material layer 405 having the through holes 105. Subsequently, the separator material layer 405 is cured by performing processes such as solvent removal (evaporation), thermal polymerization, and photopolymerization as necessary, and the separator 104 having the through hole 105 is formed on the glass substrate 401 ( FIG. 7B).
[0045]
(Example 8)
In this example, a separator forming step will be described in the method for manufacturing an electrochromic display element. FIG. 8 is a diagram showing a separator forming process of the present embodiment.
[0046]
A separator layer is formed by adhering a separator film 801 provided with an adhesive layer on both sides and having a large number of fine through-holes 105 bonded to a glass substrate 401 on which an electrode 102 and a nickel oxide layer 404 are formed. 104.
[0047]
【The invention's effect】
According to the present invention, since an expensive switching element is not used, an image free from crosstalk can be displayed at low cost. In addition, since an area for providing a switching element is not necessary, there is an advantage that a wide area can be used for display. In addition, since it is not necessary to pattern the concave portion of the substrate by photolithography, there is an effect that the manufacturing cost is not increased and it is easy to cope with a higher resolution.
[Brief description of the drawings]
FIG. 1 is a schematic view showing the structure of an electrochromic display device of the present invention.
FIG. 2 is a schematic view showing another structure of the electrochromic display device according to the present invention.
FIG. 3 is a schematic diagram showing the structure for color display of the electrochromic display device according to the present invention.
FIG. 4 is a schematic view illustrating a method for manufacturing an electrochromic display device according to the present invention.
FIG. 5 is a schematic view for explaining a separator forming step in the manufacturing process of the electrochromic display device according to the present invention.
FIG. 6 is a schematic diagram for explaining a separator forming step in the manufacturing process of the electrochromic display device according to the present invention.
FIG. 7 is a schematic diagram for explaining a separator forming step in the manufacturing process of the electrochromic display device according to the present invention.
FIG. 8 is a schematic diagram for explaining a separator forming step in the manufacturing process of the electrochromic display device according to the present invention.
FIG. 9 is a schematic view showing the structure of a conventional electrochromic display device.
[Explanation of symbols]
101 First substrate
102 Raw electrode
103 Electrochromic materials
104 separator
105 Through hole
106 electrolyte
107 column electrode
108 Second substrate
401 Glass first substrate
402 ITO layer
403 Nickel hydroxide layer
404 Nickel oxide layer
405 Separator material layer
406 Drilling jig
407 Gel electrolyte

Claims (12)

A substrate provided with an electrode; an electrochromic material layer formed on the electrode; and a counter substrate on which a counter electrode is formed. The electrode and the counter electrode intersect with each other through the electrochromic material layer. An electrochromic display device that constitutes a pixel by
An electrochromic display device, wherein an electrolyte is provided in the pixel region between the counter electrode and the electrochromic material layer, and the electrolyte is provided so as not to contact the adjacent electrode. . The electrochromic display device according to claim 1, wherein the electrolyte is provided in a partial region of the pixel. A substrate provided with electrodes;
An electrochromic material layer formed on the electrode;
A counter substrate on which a counter electrode is formed;
A separator provided between the counter electrode and the electrochromic material layer, in which a large number of fine through holes are formed;
An electrolyte filled in the through hole;
An electrochromic display device comprising: 4. The electrochromic display device according to claim 3, wherein a diameter of the through hole is smaller than a width of the electrode and the counter electrode, and is smaller than an electrode interval between the electrode and the counter electrode. The electrochromic display device according to claim 3, wherein each of the through holes is arranged so as to be in contact with only the single electrode and the single counter electrode. The electrochromic display device according to any one of claims 3 to 5, wherein the electrolyte is any one of a liquid electrolyte, a gel electrolyte, and a solid electrolyte. Forming an electrode on the first substrate;
Forming an electrochromic material layer on the electrode;
A separator layer forming step of forming an insulating resin layer having a plurality of fine through holes on the electrochromic material layer;
An electrolyte filling step of filling the through hole with an electrolyte;
Forming a counter electrode on the counter substrate;
The electrode and the counter electrode are opposed to each other through the electrochromic material layer, and the first substrate and the counter substrate are in close contact so that the electrode and the counter electrode intersect with each other;
An electrochromic display device manufacturing method comprising: The separator layer forming step includes
Coating the electrochromic material layer with a liquid resin material with a uniform thickness;
Pressing a separator drilling jig in which a plurality of minute protrusions corresponding to the diameter of the through hole and the thickness of the resin layer are arranged in the same manner as the array of the through holes against the liquid resin material;
Curing the liquid resin material;
The method for manufacturing an electrochromic display device according to claim 7, further comprising a step of separating the separator punching jig from the cured resin material. The separator layer forming step includes
Coating the electrochromic material layer with a photosensitive resin material with a uniform thickness;
8. The method of manufacturing an electrochromic display device according to claim 7, further comprising a step of exposing and developing the photosensitive resin material using a mask having a diameter and an array pattern corresponding to the through holes. The separator layer forming step includes
A step of adhering a mask having the same arrangement pattern as the through-holes on the electrochromic material layer at an opening having a diameter equal to or larger than the diameter of the through-holes;
Applying a resin material from above the mask, and selectively attaching the resin material only to the opening of the mask on the electrochromic material layer;
The method for manufacturing an electrochromic display device according to claim 7, comprising a step of curing the resin material. The separator layer forming step includes
A step of adhering a liquid resin material on the electrochromic material layer along the arrangement pattern of the through holes by an inkjet method;
The manufacturing method of the electrochromic display device of Claim 7 including the process of hardening a resin material. The separator layer forming step includes
8. The method of manufacturing an electrochromic display device according to claim 7, wherein the separator is a step of adhering an insulating separator having a large number of minute through holes on the electrochromic material layer.

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