JP3483521B2 - Manufacturing method of electrophoresis apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for manufacturing an electrophoretic device. More specifically, the present invention includes an electrophoretic device including a step of filling an electrophoretic device having an extremely small gap or a gap between a pair of substrates having electrodes on at least one side with a migration dispersion liquid containing charged electrophoretic particles. <br/> Manufacturing method.

[0002]

2. Description of the Related Art In recent years, with the development of information equipment, the need for low power consumption and thin display devices has increased, and research and development of display devices meeting these needs have been actively conducted. Among them, the liquid crystal display device is capable of electrically controlling the alignment of liquid crystal molecules and changing the optical characteristics of the liquid crystal, and has been actively developed and commercialized as a display device that can meet the above needs. However, in these liquid crystal display devices, the visual burden caused by the viewing angle of the screen, the inconvenience of characters on the screen due to the reflected light, the flicker of the light source, the low brightness, etc. has not been sufficiently solved. For this reason, researches on display devices with less burden on the eyes are being actively studied.

Reflective display devices are expected from the viewpoint of low power consumption and reduction of burden on the eyes. One of them is
Harold D. A display device invented by Lees et al. (US Pat. No. 3,612,758) is known.

FIG. 11 shows the structure of a conventional display device and its operating principle. This device is composed of a pair of electrodes 2 and 4 facing each other with an electrophoretic dispersion 8 in which a coloring dye containing charged electrophoretic particles 9 is dissolved. At least one of the pair of electrodes 2 and 4 has a translucent structure. This display device is provided with a spacer 7 for maintaining a uniform gap between the pair of substrates 1 and 3 and for dividing and dispersing the dispersion system held between the pair of substrates 1 and 3 into small sections for sealing. Has been formed.

For driving, a voltage application circuit 40 is used to apply a voltage to the electrophoretic dispersion liquid 8 through the electrodes 2 and 4, so that the charged electrophoretic particles 9 have an opposite polarity to the electric charge of the white particles. Pull up and do. The display is shown in FIG.
As shown in (b), this is performed by the color of the charged electrophoretic particles 9 and the color of the electrophoretic dispersion liquid 8 in which a coloring pigment having a color different from the hue of the electrophoretic particles 9 is dissolved. In FIG. 11A, the color of the electrophoretic dispersion liquid 9 in which the coloring dye is dissolved is visible to the observer, and in FIG.
Is visible.

In this conventional method for manufacturing an electrophoretic display device, first, a first electrode forming substrate 5 having a first electrode 2 formed on a first substrate 1 is prepared, and a spacer 7 is formed thereon. After filling the electrophoretic dispersion liquid 8 in which the coloring dye containing the charged electrophoretic particles 9 is melted, the second electrode 4 is formed on the second substrate 2.
The second electrode formation substrate 6 on which is formed is bonded, and the dispersion system sealing process is performed.

As one of the filling methods in the conventional electrophoretic display device, as shown in FIG. 12, before assembling the first electrode forming substrate 35 and the second electrode forming substrate (not shown) into the electrophoretic display device, One or the second electrode forming substrate is coated with the electrophoretic particles 36, and then the first or second electrode forming substrate coated with the electrophoretic particles 36 is assembled into the electrophoretic display device. There is a method of filling the electrophoretic dispersion liquid 37 therein (Tokutei No. 08-50).
2599).

As an embodiment of the above method, the following steps are adopted in the step of coating the charged electrophoretic particles 36 on the first or second electrode forming substrate. The first or second electrode forming substrate is attached so that the opening 30 is provided on the attachment substrate 33 having the electrode 34 and the Mylar 38, and the migration dispersion liquid 37 containing the charged electrophoretic particles 36 is provided from the opening 30. To inject. At the same time, the voltage application circuit 4
0 is used to apply a voltage between the mounting substrate 33 and the electrodes formed on the first or second electrode forming substrate to move the charged electrophoretic particles 36 toward the first or second electrode forming substrate. Then, the first or second electrode forming substrate is coated with the electrophoretic particles 36. The potential is released after sufficient coating. Thereafter, the coated first or second electrode formation substrate is manufactured by sequentially performing the manufacturing process as described above.

The embodiment of the method for filling the electrophoretic dispersion liquid 37 containing the charged electrophoretic particles 36 is as follows.
It is effective to coat the electrophoretic particles 36 on the first or second electrode forming substrate when the distance between the pair of substrates holding the electrophoretic dispersion liquid 37 containing the electrophoretic dispersion liquid is extremely narrow, and at the time of coating. It is not necessary to appropriately adjust the concentration of the charged electrophoretic particles 36 contained in the electrophoretic dispersion liquid 37 in advance.

However, in the step of coating the electrophoretic particles 36 on the first or second electrode forming substrate, the voltage applying circuit 4 is used.
0 is used to draw the electrophoretic particles 36 to the first or second electrode forming substrate by utilizing the electrophoretic phenomenon by the direct current voltage, so that the first or second electrode forming substrate exists near the electrodes. The charged electrophoretic particles 36 having the same polarity are aggregated, and the charge amount distribution of the charged electrophoretic particles 36 is not controlled.

When the charge amount distribution of the charged electrophoretic particles 36 is not controlled, the charged electrophoretic particles 36 covering the first or second electrode forming substrate are charged electrophoretic particles 3 having a large charge amount.
6 and charged electrophoretic particles 36 having a small charge amount are mixed.
In this case, when displaying on the electrophoretic display device, the driving voltage value to be applied is increased in order to cause the electrophoretic phenomenon on the charged electrophoretic particles 36 having a small charge amount. On the other hand, when the driving voltage value is lowered, the charged electrophoretic particles 36 having a small charge amount do not move sufficiently, which causes a reduction in display contrast. That is, in order to reduce the driving voltage, a method of selecting only the charged electrophoretic particles 36 having a high charge amount, and in order to increase the contrast , a method of selecting the charged electrophoretic particles 36 having a uniform charge amount. Will be requested.

The amount of the charged electrophoretic particles attached is determined by the first electrode 32 formed on the first electrode forming substrate 35 and the mounting substrate 3.
The electrode formed on the first electrode 32 and the mounting substrate 33 when a flexible substrate is used as a substrate for an electrophoretic display device because it largely depends on the gap width between the electrode 34 and the electrode 34 formed on the mounting substrate 33. Since it is difficult to uniformly maintain the gap width with respect to the first electrode forming substrate 35 within the surface of the first electrode forming substrate 35, there is a problem that the concentration distribution of the charged electrophoretic particles 36 tends to be non-uniform.

[0013]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a charging device having an appropriate charge amount distribution without considering the space between a pair of substrates and the flexibility of a substrate material. A method for manufacturing an electrophoretic device, which simply fills an electrophoretic dispersion liquid containing electrophoretic particles with an appropriate concentration distribution.
It

[0014]

The present invention has been made in order to achieve the above object, and can be solved by adopting the following method.

Although an electrophoretic display device is described among the electrophoretic devices in the following description, the manufacturing method thereof can be applied not only to the display device but also to a device to which the electrophoretic phenomenon is applied. For example, there is an electrophoretic device such as a light control device.

That is, the present invention provides a method for manufacturing an electrophoretic device, which comprises filling a migration dispersion liquid containing charged electrophoretic particles between a pair of substrates each having electrodes formed on at least one substrate, wherein the electrodes are A step of coating the formed electrophoretic particles on the formed substrate, and a step of washing the surface of the substrate on which the electrodes coated with the electrophoretic particles are formed with an electrophoretic dispersion liquid or an electrophoretic dispersion liquid containing charged electrophoretic particles. And a step of filling the substrate on which the washed electrodes are formed with a migration dispersion liquid, and a step of sealing the migration dispersion liquid between a pair of substrates having electrodes formed on at least one of the electrodes. And a method for manufacturing an electrophoretic device.

[0017]

In the present invention, the step of coating the electrophoretic particles on the substrate on which the electrodes are formed is performed by immersing the substrate in the electrophoretic dispersion liquid containing the electrophoretic particles. It is characterized in that a substrate including electrodes is coated with the charged electrophoretic particles.

Further, in the step of coating the electrophoretic particles on the substrate on which the electrodes are formed, the electrophoretic dispersion liquid containing the electrophoretic particles is sprayed or dropped onto the substrate to form the electrodes. It is characterized in that a substrate containing is coated with the charged electrophoretic particles.

The step of coating the electrophoretic particles on the substrate on which the electrodes are formed includes the electrodes by printing the electrophoretic dispersion liquid containing the electrophoretic particles on the substrate. The substrate is coated with the charged electrophoretic particles.

In addition, the substrate on which the electrodes are formed is charged.
In the process of coating electrophoretic particles , voltage is applied to the electrode.
The feature is that coating is performed while performing .

Further, when a voltage is applied to the electrode, the method has a step of controlling the polarity of the voltage or its magnitude with time, thereby moving the charged electrophoretic particles on the substrate on which the electrode is formed. It is characterized by

The step of coating the electrophoretic particles on the substrate on which the electrodes are formed includes the step of applying vibration or rotation to the substrate.

In the step of washing the surface of the substrate on which the electrode coated with the charged electrophoretic particles is formed with the electrophoretic dispersion liquid or the electrophoretic dispersion liquid containing the electrophoretic migration particles, the voltage is applied to the electrodes. There is a step of bringing the electrophoretic dispersion liquid or the electrophoretic dispersion liquid containing the charged electrophoretic particles into contact with the electrode-forming substrate, whereby excess charge electrophoretic particles are removed by flowing or on the substrate. It is characterized by compensating for the insufficient amount of the charged electrophoretic particles.

In the step of washing the surface of the substrate on which the electrode coated with the charged electrophoretic particles is formed with the electrophoretic dispersion or the electrophoretic dispersion containing the electrophoretic particles, the step of applying a voltage to the electrodes is performed. The method is characterized by including the step of controlling the polarity of the voltage or its magnitude over time, and thereby moving the charged electrophoretic particles on the substrate.

In the step of washing the surface of the substrate on which the electrode coated with the charged electrophoretic particles is formed with the electrophoretic dispersion or the electrophoretic dispersion containing the electrophoretic particles, the substrate is vibrated or rotated. It is characterized by performing washing .

Further, in the step of filling the electrophoretic dispersion liquid on the substrate on which the cleaned electrodes are formed, the step of filling the electrophoretic dispersion liquid between a pair of substrates on which electrodes are formed on at least one of the substrates. And replenishing the electrophoretic dispersion liquid thereby.

In addition, in the step of filling the electrophoretic dispersion liquid on the substrate on which the washed electrode is formed, there is a step of applying a voltage to the electrode, whereby the charged electrophoretic particles are moved onto the electrode. The feature is that

Further, in the step of sealing the electrophoretic dispersion liquid between a pair of substrates on which electrodes are formed on at least one side, there is a step of applying a voltage to the electrodes, whereby the above-mentioned electrodes are formed on the electrodes. It is characterized in that the charged electrophoretic particles are moved.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION The electrophoretic device used in the present invention is described below.
As an example of a method of manufacturing a device, a method of manufacturing an electrophoretic display device will be described in detail. In the present invention, the substrate on which the electrode is formed is simply referred to as an electrode-formed substrate unless otherwise specified.

FIG. 1 is a process chart showing an example of a method for manufacturing an electrophoretic display device of the present invention. Referring to FIG. 1, in the method for manufacturing an electrophoretic display device of the present invention, a substrate including electrodes is coated with charged electrophoretic particles in a first step, and then a substrate surface coated with charged electrophoretic particles is electrophoresed in a second step. For the migration containing the charged electrophoretic particles, followed by filling the electrophoretic dispersion liquid on the surface of the substrate coated with the electrophoretic particles in the third step and assembling the two substrates in the fourth step. It is characterized by having each step of sealing the dispersion liquid.

That is, the present invention has a step of coating the electrode-formed substrate with the electrophoretic particles before the electrode-formed substrate is incorporated into the electrophoretic display device. The coating method is as follows: the electrode-forming substrate is immersed in a migration dispersion liquid containing charged electrophoretic particles, the electrophoretic dispersion liquid containing charged electrophoretic particles is sprayed or dropped onto the electrode formation substrate, or printing is performed. Can be used.

Further, there is also a method in which a voltage is applied to the electrodes formed on the electrode forming substrate at the time of dipping, jetting or dropping, or printing.

After the electrode-formed substrate is coated with the charged electrophoretic particles, the electrophoretic dispersion liquid or the electrophoretic dispersion liquid is applied to the surface of the electrode-formed substrate coated with the charged electrophoretic particles while applying a voltage to the electrodes included in the electrode-formed substrate. The electrophoretic dispersion liquid containing charged electrophoretic particles is brought into contact. Thereby, the concentration distribution and the charge amount distribution of the charged electrophoretic particles on the electrode formation substrate are appropriately controlled. In addition, the electrophoretic dispersion liquid is filled.

As described above, the electrode-formed substrate coated with the electrophoretic particles and filled with the electrophoretic dispersion is incorporated into the electrophoretic display device, and finally, the electrophoretic particles are provided between the pair of substrates. The electrophoretic dispersion liquid contained therein is sealed.

Here, the electrophoretic dispersion liquid or the electrophoretic dispersion liquid containing charged electrophoretic particles on the surface of the electrode formation substrate covered with the charged electrophoretic particles while the voltage is applied to the electrodes included in the electrode formation substrate. The act of bringing into contact is defined as cleaning, and the means is defined as a cleaning method. Note that the cleaning or cleaning method described in the text complies with this definition.

Preferably, the polarities of the charged electrophoretic particles contained in the electrophoretic dispersion liquid containing the electrophoretic electrophoretic particles are made uniform before the filling. Preferably, the magnitude of the voltage value applied in the step of coating the electrode-forming substrate with the charged electrophoretic particles is set larger than the magnitude of the voltage value applied in the step of cleaning the electrode substrate surface coated with the electrophoretic particles. Keep it.

Preferably, the electrode-forming substrate is immersed in the above-mentioned container, and rotation or vibration is applied when the electrophoretic dispersion containing charged electrophoretic particles or the electrophoretic dispersion is jetted or dropped. Furthermore, when jetting the electrophoretic dispersion liquid or electrophoretic dispersion liquid containing charged electrophoretic particles on the electrode-forming substrate, it is preferable to perform jetting from multiple directions.

Preferably, a charge control agent is dispersed in the electrophoretic dispersion liquid and the electrophoretic dispersion liquid containing charged electrophoretic particles. Preferably, when sealing the electrophoretic dispersion liquid containing charged electrophoretic particles between a pair of substrates having electrodes formed on at least one of the opposing surfaces, a voltage is applied to the electrodes formed on the electrode formation substrate. I'll do it.

2 to 10 show an embodiment of the present invention, and sequentially explain the steps of filling the electrophoretic display device with the electrophoretic dispersion liquid containing charged electrophoretic particles. Further, FIG. 1 simply explains each step of FIGS. 2 to 10 by using a flowchart.

2 to 10, the electrode forming substrate described for explaining the filling method of the present invention is an electrode forming substrate having a first electrode and a second electrode on the first substrate. This is a substrate manufactured by the method disclosed in 202804. The use of the above electrode-formed substrate in the filling method of the present invention is merely an example, and an electrode-formed substrate having a configuration having a functionally equivalent function can also be used.

In the present invention, the substrate is made of PET or PE.
A substrate made of a flexible material such as S can be used.

Two methods can be considered to achieve the first step shown in FIG. One is a method of covering the surface including the electrodes formed on the electrode forming substrate 10 with the electrophoretic particles 18 as shown in FIG. The other is as shown in Figure 3.
In this method, a voltage is applied to the electrodes formed on the electrode-forming substrate 10 to coat the electrodes with charged electrophoretic particles. In any case, it is preferable to disperse a charge control agent (not shown) in the electrophoretic dispersion liquid containing the electrophoretic particles.

As the charge control agent, there are a positive charge control agent and a negative charge control agent. As the positive charge control agent, a metal salt of naphthenic acid (cobalt, manganese, iron, etc.), zirconium octenoate, etc. can be arbitrarily used. . As the negative charge control agent, lecithin, calcium petroleum sulfinate, sodium alkylbenzene sulfonate, alkyl alanine and the like can be optionally used.

Normally, the plurality of charged electrophoretic particles 18 present in the electrophoretic dispersion liquid 17 all have the same polarity charge, but the electrophoretic dispersion liquid 17 has a different polarity charge. When 18 are mixed, the electrode forming substrate 10
It is preferable to select only the electrophoretic particles 18 having the same polarity by a method such as an electrophoresis method before filling the electrophoretic dispersion liquid 17 containing the electrophoretic particles 18 in the above.

In the following, further explanation will be given on the above two methods. In the former case, as shown in FIG. 2, the electrode-forming substrate 10 is used to disperse the electrophoretic dispersion liquid 1 containing charged electrophoretic particles 18.
The surface including the electrodes formed on the electrode forming substrate 10 by immersing in the electrode 7 or by spraying or dropping the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 on the electrode forming substrate 10 or by printing. This is a method of coating the inside with charged electrophoretic particles 18.

In the latter case, as shown in FIG.
Charged electrophoretic particles 18 cover the top or the second electrode 14 that does not overlap the first electrode 12. To do so, take the following method.

With the electrode forming substrate 10 exposed to the electrophoretic dispersion 17 containing the charged electrophoretic particles 18, the voltage applying circuit 41 is used to form the first electrode 12 and the second electrode 12 formed on the electrode forming substrate 10. When different voltages are periodically applied to the electrode 14, the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 move onto the first electrode 12 or onto the second electrode 14 that does not overlap the first electrode. If this state is maintained for a certain period, as shown in FIG.
The second electrode 14 that does not overlap 2 is covered with the charged electrophoretic particles 18.

Using the voltage application circuit 41, the first electrode 12
When voltages having different polarities are periodically applied to the first electrode 12 and the second electrode 14, the electrophoretic phenomenon causes the charged electrophoretic particles 18 to move on the first electrode 12 or the first electrode 12 as shown in FIGS. The second electrophoretic particles 18 move to the second electrode 14 that does not overlap with the first electrode 12, or the second electrode 14 that does not overlap the first electrode 12 is covered with the electrophoretic particles 18.

Normally, the magnitude of the applied voltage is 0 to 300.
The frequency is about V, and the frequency is 0.01 to 50 Hz. The voltage application waveform is not particularly limited. In the stage of the first step, it is not necessary to properly adjust the concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17. Therefore, on the first electrode 12 or the second electrode 14,
The charged electrophoretic particles 18 having a concentration higher than a desired concentration may be present, or the charge amount distribution of each of the charged electrophoretic particles 18 may be non-uniform.

After adopting any of the above methods and completing the first step shown in FIG. 1, the following steps are continued.

FIG. 4 corresponds to the second step shown in FIG. A method is shown in which, of the charged electrophoretic particles 18 coated on the substrate in the first step, excess charge electrophoretic particles 18 are removed by a cleaning method.

The surplus charged electrophoretic particles 18 referred to here are
Among the electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17, the electrophoretic particles 18 having a low charge amount, and the electrophoretic particles 18 that adversely affect the electrophoretic phenomenon in the electrophoretic dispersion liquid 17 for other reasons. Means

In the cleaning method shown in FIG. 4, the voltage application circuit 41 is used to apply an AC voltage to the first electrode 12 and the second electrode 14. At the same time, the electrophoretic dispersion liquid 1 containing the charged electrophoretic particles 18 filled in the first step.
7, the electrophoretic dispersion liquid 17 is brought into contact with the electrophoretic dispersion liquid 17, and thereby the electrophoretic particles 18 having a relatively weak binding force due to the electrophoretic phenomenon generated by the first electrode 12 and the second electrode 14 are moved to the outside of the electrode forming substrate 10. It is poured out and removed.

At this time, the electrode-forming substrate 10 is immersed in the electrophoretic dispersion liquid 17 containing the electrophoretic migration particles 18 or a container filled with the electrophoretic dispersion liquid 17, or the electrophoretic particles are charged on the electrode-forming substrate 10. It is preferable to jet or drop the electrophoretic dispersion liquid 17 containing 18 or the electrophoretic dispersion liquid 17. More preferably, the electrode-forming substrate 10 is immersed in the solution in the container while stirring, and the electrophoretic dispersion liquid 17 or the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 is jetted or dropped. At this time, rotation or vibration is applied. Further, when jetting the electrophoretic dispersion liquid 17 or the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 onto the electrode-forming substrate 10, it is preferable to perform ejection from multiple directions.

The magnitude of the voltage value applied to the voltage applying circuit 41 in the second step is preferably smaller than the magnitude of the voltage value applied in the first step. Furthermore, the magnitude of the applied voltage is about 0 to 300 V, and the frequency is 0.01 to 50 Hz. The voltage application waveform is not particularly limited.

FIG. 5 shows a cleaning method using the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18, and other than that is the same as the cleaning method shown in FIG.

FIG. 6 corresponds to the third step shown in FIG. 1 and shows the electrode-formed substrate after the excess charged electrophoretic particles have been removed in the second step. At this stage, the concentration distribution and the charge amount distribution of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 filled on the electrode forming substrate 10 are appropriately adjusted. At this time, when the electrophoretic dispersion liquid 17 is insufficient or when it is preferable to fill the electrophoretic dispersion liquid 17 excessively, the voltage application circuit 41 is used to apply the voltage to the first electrode 11 and the second electrode 12. The electrophoretic dispersion liquid 17 may be gently replenished while applying an AC or DC voltage. At this time, it is preferable to disperse the charge control agent in the electrophoretic dispersion liquid 17.

FIG. 7 corresponds to the fourth step shown in FIG. 1, and the second substrate is bonded so as to face the electrode forming substrate shown in FIG. 6, and at the same time, the extra electrophoretic dispersion liquid 17 is poured out. . After that, the periphery of the first substrate 11 and the second substrate 13 and other bonding portions are bonded. As a result, the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 is sealed in the gap formed by the first substrate 11 and the second substrate 13.
By the convection of the electrophoretic dispersion liquid 17 or the like until the end of the fourth step or during the work in the middle thereof, the first electrode 1
When the charged electrophoretic particles 18 covering the second electrode 14 or the second electrode 14 that does not overlap the first electrode 12 move, the voltage application circuit 41 is used to apply an alternating current to the first electrode 12 and the second electrode 14. Alternatively, it is preferable to adopt a means for preventing the movement of the charged electrophoretic particles 18 by applying a DC voltage.

In the display device manufactured here, the charged electrophoretic particles 18 are dispersed in the electrophoretic dispersion liquid 17 in parallel with the substrate surface according to the potential difference between the first electrode 12 and the second electrode 14, and the first electrode 12 is used. The display is performed by moving the second electrode 14 to the upper or the second electrode 14, and the second electrode 14 is grounded to the positively charged electrophoretic particles 18 as shown in FIGS. 9 and 10, for example. When positive and negative voltages are applied to the electrodes 12, the charged electrophoretic particles 18 gather on the electrodes having a relatively low charge.

At this time, when the charged electrophoretic particles 18 and the first electrode 12 are black and the second electrode 14 is white, if the charged electrophoretic particles 18 gather on the first electrode 12, white display can be performed. On the other hand, the charged electrophoretic particles 18 serve as the first electrode 12.
If they are gathered on the second electrode 14 that does not overlap with the above, black display can be performed.

[0062]

The present invention will be described in more detail below with reference to the illustrated embodiments.

Example 1 An example of a method for manufacturing an electrophoretic display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which charged electrophoretic particles 18 made of black polystyrene having an average particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimal for the display of the electrophoretic display device finally produced in this embodiment. The concentration was adjusted to be higher than that.

The first electrode 12 and the second electrode 14 of the electrode forming substrate 10 prepared in advance are formed in a container (not shown) filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18. The surface was immersed so that the surface was faced upward. After that, the electrode-forming substrate 1 immersed in the container
0 is an electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18.
I pulled it out slowly. At this time, the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 was placed on the electrode-forming substrate 10 as shown in FIG.

The substrate has a thickness of 100 μm and a thickness of 10 μm.
A substrate made of PET having a size of cm □ was used.

In the second step shown in FIG. 1, the charged electrophoretic particles 18 are applied to the first electrode 12 and the second electrode 14 while applying a ± 40 V rectangular wave at 1 Hz, as shown in FIG.
The migration dispersion liquid 17 in which the charge control agent was gently dispersed was flowed on the upper surface of the electrode forming substrate 10 covered with.

At this time, the electrode-forming substrate 10 was slowly and eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the vertical direction as the central axis. The first step and the second step were repeated 5 times.

In the third step shown in FIG. 1, +100 V is applied to the first electrode 12 and the second electrode 14 is applied, as shown in FIG.
The dispersion liquid for migration 1 in which a charge control agent is dispersed in the electrode forming substrate 10 while applying a DC voltage of −100 V to the electrode.
7 was fully filled.

In the fourth step shown in FIG. 1, +100 V is applied to the first electrode 12 and the second electrode 14 is applied, as shown in FIG.
While the DC voltage of −100 V is applied to the electrode-forming substrate 10, the second substrate 13 is bonded to the electrode-forming substrate 10, and at the same time, the second substrate 13 is pressed slowly from above to obtain an extra electrophoretic dispersion. Liquid 17 was drained. After that, the periphery of the electrode forming substrate 10 and the second substrate 13 and other adhering portions are adhered by heat fusion to seal the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 between the two substrates. I stopped. The distance between the substrates was 20 μm.

When a voltage was applied to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured according to the above-described example to perform display, when the drive voltage was ± 40 V, the display contrast was 8, The response speed was about 10 msec.

Example 2 An example of a method of manufacturing a display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimum for the display of the electrophoretic display device finally produced in this embodiment. The concentration was adjusted to be higher than that.

The electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 was jetted toward the surface of the electrode-forming substrate 10 prepared in advance, on which the first electrode 12 and the second electrode 14 were formed. At this time, the substrate was tilted at an angle from the horizontal plane, and was gently vibrated during the jetting. At this time, the angle was about 30 °.

In the second step shown in FIG. 1, the charged electrophoretic particles 18 are applied to the first electrode 12 and the second electrode 14 while applying a rectangular wave of ± 40 V at 1 Hz, as shown in FIG.
The migration dispersion liquid 17 in which the charge control agent was gently dispersed was flowed on the upper surface of the electrode forming substrate 10 covered with.

At this time, the electrode forming substrate 10 was slowly and eccentrically rotated about the center of the surface of the electrode forming substrate 10 as a central axis. The first step and the second step were repeated four times.

Thereafter, the same processes as the third and subsequent steps described in Example 1 were performed. When a voltage was applied to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by this manufacturing method to display, a display contrast was 8 and a response speed was 10 msec when the driving voltage was ± 40V. A value of degree was obtained.

Example 3 An example of a method of manufacturing the display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flow chart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimum for the display of the electrophoretic display device finally produced in this embodiment. The concentration was adjusted to be higher than that.

The electrophoretic dispersion liquid containing the charged electrophoretic particles was prepared in advance, and the first electrode 1 of the electrode forming substrate 10 was prepared.
It printed uniformly on the surface in which 2 and the 2nd electrode 14 were formed. In the second step shown in FIG. 1, as shown in FIG. 4, a ± 40 V rectangular wave smaller than the voltage value applied in the first step is applied to the first electrode 12 and the second electrode 14 at 1 Hz. On the other hand, the electrophoretic dispersion liquid 17 in which the charge control agent was gently dispersed was flowed on the upper surface of the electrode forming substrate 10 coated with the electrophoretic particles 18.

At this time, the electrode forming substrate 10 was slowly eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the vertical direction as the central axis. Hereinafter, the same process as the third and subsequent steps described in Example 1 was performed. When a voltage is applied to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by the manufacturing method to display, when the drive voltage is ± 40 V,
The display contrast was 8 and the response speed was about 10 msec.

Example 4 An example of a method of manufacturing a display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimal for the display of the electrophoretic display device finally produced in this embodiment. The concentration was adjusted to be higher than that.

The first electrode 12 and the second electrode 14 of the electrode forming substrate 10 prepared in advance are formed in a container (not shown) filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18. The surface was submerged so that it faced downward, and immediately after that, a ± 60 V rectangular wave was applied to the first electrode 12 and the second electrode 14 at 1 Hz. At this time, the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 in the container was slowly stirred. The application time was 3 minutes.

After that, the liquid surface of the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 filled in the container is gradually lowered, and the electrode forming substrate 10 is submerged in the container.
Was released from the state of being exposed to the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18.

In the second step shown in FIG. 1, as shown in FIG. 4, a rectangular wave of ± 40 V which is smaller than the voltage value applied in the first step is applied to the first electrode 12 and the second electrode 14.
While being applied at Hz, the electrophoretic dispersion liquid 17 in which the charge control agent was gently dispersed was flowed on the upper surface of the electrode-forming substrate 10 coated with the electrophoretic particles 18.

At this time, the electrode forming substrate 10 was slowly and eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the vertical direction as the central axis. The first step and the second step were repeated 3 times.

Thereafter, the same processes as the third and subsequent steps described in Example 1 were performed. When a voltage was applied to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by this manufacturing method to display, a display contrast was 8 and a response speed was 10 msec when the driving voltage was ± 40V. A value of degree was obtained.

Example 5 An example of a method for manufacturing a display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimum for the display of the electrophoretic display device finally produced in this example. The concentration was adjusted to be higher than that.

The electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 was poured onto the surface of the electrode-forming substrate 10 prepared in advance on which the first electrode 12 and the second electrode 14 were formed. Immediately after that, a rectangular wave of ± 60 V was applied to the first electrode 12 and the second electrode 14 at 1 Hz. The application time was 3 minutes.

In the second step shown in FIG. 1, while applying a rectangular wave of ± 60 V, which is the same as the voltage value applied in the first step, to the first electrode 12 and the second electrode 14 at 1 Hz, The electrophoretic dispersion liquid 17 in which the charge control agent is gently dispersed in the electrode-forming substrate 10 coated with the electrophoretic migration particles 18 so that the surface coated with the electrophoretic migration particles 18 faces downward. It was submerged in a filled container (not shown). At the same time, the electrode forming substrate 10 was slowly rotated. The electrophoretic dispersion liquid 17 in the container was slowly stirred. This state was maintained for 3 minutes.

The first step and the second step were repeated four times. In the third step shown in FIG. 1, the first electrode 12
While applying a ± 60 V rectangular wave at 1 Hz to the second electrode 14, the electrode forming substrate 10 was sufficiently filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 in which the charge control agent was dispersed.

At this time, the electrode forming substrate 10 was slowly eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the vertical direction as the central axis.

Hereinafter, when a display was performed by applying a voltage to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by performing the same process as the fourth and subsequent steps described in Example 1, it was driven. When the voltage was ± 40 V, the display contrast was 8 and the response speed was about 10 msec.

Example 6 An example of a method for manufacturing a display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
Exxon Inc.), the black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed,
Further, electrophoresis treatment was performed as follows.

First, a mixed solution containing the above components was filled in a container (not shown), and two electrode plates having different polarities were provided above and below the container. Next, a DC voltage of ± 100 V was applied to each of the two electrode plates, and only the positively charged charged electrophoretic particles 18 were collected from the container. The charged electrophoretic particles 18 and the charge control agent thus collected were dispersed in the electrophoretic dispersion liquid 17.

In the first step shown in FIG. 1, the concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 produced as described above is set to the above-mentioned electrical concentration finally produced in this embodiment. The concentration was adjusted to be lower than the optimum concentration for display on the electrophoretic display device.

Immediately after immersing in a container (not shown) filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18, the upper surface of the electrode-forming substrate 10 prepared beforehand is directed downward. ± 60 for the first electrode 12 and the second electrode 14
A rectangular wave of V was applied at 1 Hz. The application time was 6 minutes.

In the second step shown in FIG. 1, the liquid level of the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 filled in the container is gradually lowered to form the electrode submerged in the container. The substrate 10 was released from the state of being exposed to the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18.

Thereafter, as shown in FIG. 4, the first electrode 12 and the second electrode 14 are applied with a rectangular wave of ± 40 V, which is smaller than the voltage value applied in the first step, at 1 Hz, and the charging is performed. On the upper surface of the electrode forming substrate 10 covered with the electrophoretic particles 18, the electrophoretic dispersion liquid 17 in which the charge control agent was gently dispersed was poured.

At this time, the electrode forming substrate 10 was slowly and eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the vertical direction as the central axis. The first step and the second step were repeated twice.

Hereinafter, a display was performed by applying a voltage to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by performing the same process as the third and subsequent steps described in Example 1, and it was driven. When the voltage was ± 40 V, the display contrast was 8 and the response speed was about 10 msec.

Example 7 An example of a method for manufacturing a display device of the present invention will be described by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black charged electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

The concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 used in the first step shown in FIG. 1 is optimum for the display of the electrophoretic display device finally produced in this example. The concentration was adjusted to be lower than the concentration.

The first electrode 12 and the second electrode 14 of the electrode-forming substrate 10 prepared in advance are formed in a container (not shown) filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18. The surface was immersed so that the surface was faced upward. After that, the electrode-forming substrate 1 immersed in the container
0 is an electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18.
I pulled it out slowly. At this time, the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 was placed on the electrode-forming substrate 10 as shown in FIG.

In the second step shown in FIG. 1, as shown in FIG. 5, the charged electrophoretic particles 18 are applied to the first electrode 12 and the second electrode 14 while applying a rectangular wave of ± 40 V at 1 Hz.
The electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 in which the charge control agent was gently dispersed was flowed on the upper surface of the electrode formation substrate 10 covered with.

At this time, the electrode forming substrate 10 was slowly eccentrically rotated about the center of the surface of the electrode forming substrate 10 with the direction perpendicular to the center axis. The first step and the second step were repeated 3 times.

Hereinafter, a display was performed by applying a voltage to the first electrode 12 and the second electrode 14 of the electrophoretic display device manufactured by performing the same process as the third and subsequent steps described in Example 1, and driving was performed. When the voltage was ± 40 V, the display contrast was 8 and the response speed was about 10 msec.

Example 8 An example of a method for manufacturing a display device of the present invention will be shown by appropriately using FIGS. 2 to 10 in accordance with the process flowchart shown in FIG.

In this embodiment, the case where the first electrode and the second electrode are formed on both of the pair of substrates will be described. Therefore, the substrate farther from the observer will be referred to as a first electrode formation substrate 45, and the substrate closer to the observer will be referred to as a second electrode formation substrate 46 below.

Charged electrophoretic particles 1 used in this example
The electrophoretic dispersion liquid 17 containing 8 is an electrophoretic dispersion liquid 17 containing an aliphatic hydrocarbon as a main raw material (trade name: Isopar,
A liquid in which black electrified electrophoretic particles 18 having a particle size of about 1 to 2 μm and a charge control agent (not shown) are dispersed in Exxon Co.) is used.

In the first step shown in FIG. 1, the concentration of the charged electrophoretic particles 18 contained in the electrophoretic dispersion liquid 17 is optimized for the display of the electrophoretic display device finally manufactured in this embodiment. The concentration was adjusted to be higher than that.

The first electrode 12 and the second electrode 14 of the first electrode forming substrate 45 prepared in advance are placed in a container (not shown) filled with the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18. Sink so that the surface where is formed faces downward,
Immediately after that, a rectangular wave of ± 60 V was applied to the first electrode 12 and the second electrode 14 at 1 Hz. The application time was 3 minutes.

After that, the liquid level of the electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18 filled in the container is gradually lowered, and the first electrode forming substrate 4 submerged in the container.
5 is an electrophoretic dispersion liquid 17 containing the charged electrophoretic particles 18.
Released from being exposed to.

In the second step shown in FIG. 1, as shown in FIG. 4, a rectangular wave of ± 40 V smaller than the voltage value applied in the first step is applied to the first electrode 12 and the second electrode 14.
While being applied at Hz, the electrophoretic dispersion liquid 17 in which the charge control agent was gently dispersed was flowed on the upper surface of the first electrode forming substrate 45 coated with the electrophoretic particles 18.

At this time, the first electrode forming substrate 45 was slowly eccentrically rotated about the central portion of the surface of the first electrode forming substrate 45 with the vertical direction as the central axis. The first step and the second step were repeated 3 times.

Second electrode forming substrate 4 prepared in advance
The same process as above was performed on the surface of No. 6 on which the first electrode 42 and the second electrode 44 were formed. The second electrode forming substrate 4
The first electrode 42 and the second electrode 44 formed in 6 are IT0
(Indium Tin Oxide).

After that, as shown in FIG. 6, the first electrode forming substrate 4 is formed.
5 of the first electrode 12 + 100V, the second electrode 14 of -10
While applying a direct current voltage of 0 V, the first electrode formation substrate 4
5. The electrophoretic dispersion liquid 17 in which the charge control agent is dispersed in No. 5
Was fully filled. The same process as above was performed on the second electrode formation substrate 46.

In the fourth step shown in FIG. 1, as shown in FIG. 8, the first electrode forming substrate 45 and the second electrode forming substrate 46 are formed.
While applying a DC voltage of +100 V to the first electrode and a voltage of -100 V to the second electrode formed on each of the
The first electrode-forming substrate 45 was attached to the second electrode-forming substrate 46 so as to face it, and at the same time, the second electrode-forming substrate 46 was slowly pressed down from above, and the excess electrophoretic dispersion liquid 17 was poured out. Then, the first electrode forming substrate 45
Then, the periphery of the second electrode forming substrate 46 and other adhering portions were adhered by heat fusion to seal the electrophoretic dispersion liquid 17 containing the electrophoretic particles 18 between the two substrates. The distance between the substrates was 15 μm.

As shown in FIG. 10, the first electrode 12 formed on the first electrode forming substrate 45 and the first electrode 42 of the second electrode forming substrate 46 of the electrophoretic display device manufactured according to the above-described embodiment are arranged. When the display is performed by synchronizing the second electrode 14 formed on the first electrode forming substrate 45 and the second electrode 44 of the second electrode forming substrate 46 and applying a voltage to each of them, When the driving voltage was ± 25 V, the display contrast was 8 and the response speed was about 7 msec.

[0129]

As described above in detail, the following effects can be obtained by using the method for manufacturing an electrophoretic device of the present invention. In the step of filling the electrophoretic dispersion liquid containing charged electrophoretic particles, even when the gap between the pair of substrates is very narrow, or even when a flexible substrate is used, a washing process using the electrophoretic dispersion liquid can be performed. By having it, the charged electrophoretic particles having a low charge amount can be removed, and a desired concentration distribution of the charged electrophoretic particles can be achieved in a short time. As a result, in the electrophoretic display device in which the distance between the pair of substrates is very narrow, it is possible to achieve an extremely high display contrast with a lower voltage than the conventional one.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 2 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 3 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 4 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 5 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 6 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 7 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 8 is a schematic view showing one step of a method for manufacturing an electrophoretic display device of the present invention.

FIG. 9 is a schematic view showing an example of an electrophoretic display device manufactured by the method for manufacturing an electrophoretic display device of the present invention.

FIG. 10 is a schematic view showing an example of an electrophoretic display device manufactured by the method for manufacturing an electrophoretic display device of the present invention.

FIG. 11 is a schematic view showing a conventional electrophoretic display device.

FIG. 12 is a schematic view showing an example of a method for manufacturing a conventional electrophoretic display device.

[Explanation of symbols]

1,11,31 First substrate 2, 12, 32, 42 First electrode 3,13,43 Second substrate 4,14,44 Second electrode 5,35,45 First electrode forming substrate 6,46 Second electrode forming substrate 7,16 spacer 8,17,37 Electrophoresis dispersion 9,18,36 Electrophoretic particles 10 Electrode forming substrate 30 openings 33 mounting board 34 electrodes 38 Mylar 40, 41 voltage application circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02F 1/15-1/19

Claims (13)

(57) [Claims] 1. A method for manufacturing an electrophoretic device comprising filling a migration dispersion liquid containing charged electrophoretic particles between a pair of substrates, each of which has electrodes formed on at least one of the substrates. And a step of washing the surface of the substrate on which the electrode coated with the charged electrophoretic particles is formed with the electrophoretic dispersion or the electrophoretic dispersion containing the electrophoretic particles. And a step of filling the electrophoretic dispersion liquid on the substrate on which the electrodes are formed, and a step of sealing the electrophoretic dispersion liquid between a pair of substrates on which electrodes are formed on at least one of the electrodes. Method for manufacturing electrophoretic device. 2. The step of coating the electrophoretic particles on the substrate on which the electrodes are formed is performed by immersing the substrate in the electrophoretic dispersion liquid containing the electrophoretic particles to remove the electrodes. The method for manufacturing an electrophoretic device according to claim 1, wherein a substrate including the electrophoretic particles is coated with the charged electrophoretic particles. 3. The step of coating the electrophoretic particles on the substrate on which the electrodes are formed is carried out by spraying or dropping the electrophoretic dispersion liquid containing the electrophoretic particles onto the substrate. The method of manufacturing an electrophoretic device according to claim 1, wherein a substrate including a substrate is coated with the charged electrophoretic particles. 4. The step of coating the electrophoretic particles on the substrate on which the electrodes are formed is performed by printing the electrophoretic dispersion liquid containing the electrophoretic particles on the substrate.
The method of manufacturing an electrophoretic device according to claim 1, wherein a substrate including the electrode is coated with the charged electrophoretic particles. 5. Electrophoresis on a substrate on which the electrode is formed
In the step of coating the particles , voltage is applied to the electrode.
The method of manufacturing an electrophoretic device according to claim 1 , wherein the coating is performed while the coating is performed . 6. When the voltage is applied to the electrode, the method has a step of controlling the polarity of the voltage or its magnitude with time, so that the charged electrophoretic particles are moved on the substrate on which the electrode is formed. The method for manufacturing an electrophoretic device according to claim 5, wherein: 7. The step of coating the substrate on which the electrode is formed with the charged electrophoretic particles includes the step of applying vibration or rotation to the substrate.
A method for manufacturing an electrophoretic device according to any one of 1. 8. The step of washing the substrate surface on which the electrode coated with the charged electrophoretic particles is formed with an electrophoretic dispersion liquid or an electrophoretic dispersion liquid containing charged electrophoretic particles while applying a voltage to the electrodes. There is a step of bringing the electrophoretic dispersion liquid or the electrophoretic dispersion liquid containing the charged electrophoretic particles into contact with the electrode-forming substrate, whereby excess electrophoretic particles are removed by flowing or on the substrate. The method for manufacturing an electrophoretic device according to claim 1, wherein a shortage of the charged electrophoretic particles is supplemented. 9. A step of applying a voltage to the electrode in the step of washing the surface of the substrate on which the electrode coated with the charged electrophoretic particles is formed with the electrophoretic dispersion or the electrophoretic dispersion containing the electrophoretic particles. and a step of controlling the polarity or a magnitude of the over time voltage, thereby characterized that you move the electrophoretic particles on the substrate according
Item 9. A method for manufacturing an electrophoretic device according to Item 8 . 10. In the step of washing the surface of the substrate on which the electrodes coated with the charged electrophoretic particles are formed with an electrophoretic dispersion liquid or an electrophoretic dispersion liquid containing charged electrophoretic particles, the substrate is vibrated or rotated. 10. The method for manufacturing an electrophoretic device according to claim 1, wherein the electrophoretic device is washed . " 11. The step of filling the electrophoretic dispersion liquid on the substrate on which the cleaned electrodes are formed, the step of filling the electrophoretic dispersion liquid between a pair of substrates on which electrodes are formed on at least one of the substrates. 2. The method for manufacturing an electrophoretic device according to claim 1, further comprising: replenishing the electrophoretic dispersion liquid. 12. A step of applying a voltage to the electrode in the step of filling the electrophoretic dispersion liquid on the substrate on which the cleaned electrode is formed, whereby the charged electrophoretic particles are moved onto the electrode. Claim 1 or 1 characterized in that
1. The method for manufacturing the electrophoretic device according to 1. 13. A step of sealing the electrophoretic dispersion liquid between a pair of substrates having electrodes formed on at least one of the electrodes,
The method of manufacturing an electrophoretic device according to claim 1, further comprising: applying a voltage to the electrode, thereby moving the charged electrophoretic particles on the electrode.