JP2002148663A - Display device and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a display device having strong resistance to parting of a spacer from a substrate and to position-shifting of the substrate and the space, free from the generation of display unevenness and having excellent display holding characteristics. SOLUTION: A lattice type spacer 5 concurrently serving as barrier ribs partitioning small regions is formed on a first substrate 1 and an adhesion layer 9 is formed thereon except a flow passage 10. A second substrate 4 is adhered to the adhesion layer 9 so that the function of the flow passage 10 is not damaged and a dispersion medium or a dispersed system is injected. The adhesion layer 9 is crushed and flattened by a pressing body until the flow passage 10 is sealed. Thus, the dispersed system injected into each small region is encapsulated between the first and the second substrates by the spacer and the adhesion layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a display device for displaying by moving charged particles by an electric field and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, with the development of information equipment, needs for low power consumption and thin display devices have increased, and research and development of display devices meeting these needs have been actively conducted. Among them, a liquid crystal display device is capable of electrically controlling the arrangement of liquid crystal molecules and changing the optical characteristics of liquid crystal, and has been actively developed and commercialized as a display element capable of meeting the above needs.

[0003] However, these liquid crystal display devices have not yet sufficiently solved the difficulty in seeing characters on the screen due to the angle at which the screen is viewed or reflected light, and the visual burden caused by flickering and low brightness of the light source. For this reason, research on a display device with a small burden on vision has been actively conducted.

[0004] Among them, a reflection type display device is expected from the viewpoints of low power consumption and reduction of the burden on eyes. Part 1
One example is a display device invented by Harold D. Lees (US Pat. No. 36127).
58 gazette).

FIG. 5 shows the structure of a conventional display device and its operation principle. This device is opposed to a dispersion system including a charged particle 6 and a liquid dispersion medium 7 in which a coloring dye is dissolved.
At least one of a pair of electrodes 2 and 3 made of a transparent material
Consists of Reference numeral 5 denotes a spacer which also serves as a partition wall for enclosing the dispersion system in small sections.

The display operation is performed by applying a voltage to the liquid dispersion medium 7 via the electrodes 2 and 3 to attract the charged particles 6 to an electrode having the opposite polarity to the charge of the particles themselves. The display is performed by the color of the charged particles 6 and the color of the liquid dispersion medium 7 in which a coloring dye having a different color from the charged particles 6 is dissolved.

That is, when one of the transparent electrodes is set to the observer side and the charged particles move to the electrode located on the side opposite to the observer, the observer recognizes the color of the charged particles. Instead, the color of the liquid dispersion medium is observed. On the other hand, when the voltage applied between the electrodes is reversed and the charged particles are moved to the observer side, the observer recognizes the color of the charged particles, and the binary value depends on the colors of the charged particles and the liquid dispersion medium. Display can be performed.

As a manufacturing method, first, a first electrode 2 is formed on a first substrate 1, a spacer 5 is formed thereon,
After injecting a dispersion system composed of the charged particles 6 and the liquid dispersion medium 7 in which the coloring dye is melted, the second substrate 4 on which the second electrode 3 is formed is attached and the dispersion system is sealed.

As a method of enclosing the dispersion system, there is, for example, the following method (Japanese Patent No. 2733680). First, as shown in FIG. 6, a swelling porous spacer 20 and a heat-sealable adhesive layer 23 are laminated, and this serves as a partition for dividing the dispersion system into small sections. Supply in excess.

Next, FIG.
As shown in (1), the heating pressing force by the heating roller 25 is sequentially applied. As a result, the excess dispersion system is extruded, and at the same time, the dispersion system 21 is sealed in the small area while performing the thermal fusion bonding between the adhesive layer 23 and the flexible substrate 24.

[0011]

However, at the time of encapsulating the dispersion, a method of performing thermal fusion bonding between the swollen porous spacer and the flexible substrate after excessively injecting the dispersion as described above is taken. In addition, the adhesive surface is exposed to the dispersion, resulting in a decrease in adhesive strength. As a result, problems such as peeling of the spacer from the substrate due to stress at the time of bending the substrate and displacement of the spacer from the substrate occur.

In order to solve such a problem, a method may be considered in which the substrate and the spacer are bonded in advance in a step before the injection of the dispersion system. In this case, there is a method in which a spacer is provided with a dispersion-injecting flow path that connects adjacent small sections, and the dispersion system is injected through this flow path.

However, if the flow path for injecting the dispersion system is provided in the spacer as described above for enclosing the dispersion system, when the display device is used, movement of charged particles due to application of a voltage, bending of the substrate, etc. The change causes convection of the dispersion system between adjacent small sections through the flow path. Due to this convection, the charged particles move, causing a bias in the charged particle concentration distribution in the entire display device. As a result, problems occur such that display unevenness occurs and display retention is hindered.

An object of the present invention is to solve the above-mentioned problems, and to remove a spacer from a substrate due to stress at the time of bending the substrate,
Strong resistance to displacement between the substrate and the spacer, eliminating uneven distribution of charged particles, no display unevenness,
An object of the present invention is to provide a method of manufacturing a display device having excellent display holding characteristics, which is as inexpensive as possible, and a display device manufactured by using the method.

[0015]

According to a first aspect of the present invention, there is provided a first substrate and a second substrate which are arranged to face each other;
A spacer also serving as a partition for forming a plurality of small sections between the opposed substrates, an adhesive layer for bonding the spacer to the second substrate, and charging in a liquid dispersion medium sealed in the small section. It has at least a dispersion system formed by dispersing particles and a first electrode and a second electrode for applying a voltage to the dispersion system, and is charged by an electric field generated by a voltage applied between the first electrode and the second electrode. A method for manufacturing a display device for displaying by moving particles, wherein the bonding is performed on the spacer formed on one surface of the first substrate while leaving a flow path communicating between the small areas and the small area and the outside. Forming a layer;
A step of supplying the charged particles to the small section; a step of bonding the second substrate onto the adhesive layer while maintaining a flow path; and It is characterized by including at least a step of injecting into the small section and a step of sealing the flow path by crushing the adhesive layer formed with the flow path.

According to a second aspect of the present invention, there is provided a first substrate and a second substrate which are arranged to face each other, and a spacer which also serves as a partition for forming a plurality of small sections between the substrates which are arranged to face each other. An adhesive layer for adhering the spacer and the second substrate; a dispersion system in which charged particles are dispersed in a liquid dispersion medium sealed in the small section; and a first system for applying a voltage to the dispersion system.
A method for manufacturing a display device having at least an electrode and a second electrode and performing display by moving charged particles by an electric field generated by a voltage applied between the first electrode and the second electrode, comprising: Forming an adhesive layer on the spacer formed on one side of the substrate, leaving a flow path communicating between the small areas and between the small areas and the outside; and forming a second adhesive layer on the adhesive layer while maintaining the flow path. Bonding the substrate, injecting the dispersion system into the small area in the display device through the flow channel, and sealing the flow channel by crushing the adhesive layer in which the flow channel is formed. And at least a step of performing

In the present invention, the adhesive layer has a hot-melt property, and in the step of sealing the flow path, the adhesive layer formed with the flow path is softened by heating to crush the adhesive layer. By sealing the flow path, the crushing of the adhesive layer formed with the flow path can only cover the part where the small area of the display device is formed and the part where the adhesive layer around it is formed Performing with a pressing object having a plane portion of, and sealing all the flow paths simultaneously,
Providing a plurality of flow paths for each of the small sections as a preferred embodiment.

Further, the present invention provides a display device manufactured by the above-described method for manufacturing a display device of the present invention.

[0019]

FIG. 4 is a schematic view showing the characteristic steps of the present invention. 5 is a spacer also serving as a partition wall forming a small area, 9 is an adhesive layer formed on the spacer, 10
Is a portion where no adhesive layer is formed as a flow path (hereinafter referred to as flow path 10), 11 is a small area separated by 5,
Reference numeral 4 denotes a substrate, and 13 denotes a pressing object. 1- (a) is a top view of the spacer 5 on which the adhesive layer 9 is formed, and FIG.
FIG. 3B is a cross-sectional view taken along a broken line AB in FIG. 1- (c) is a top view of the spacer 5 on which the adhesive layer 9 is formed, and 1- (d) is a broken line A′-B ′ of 1- (c).
FIG.

The characteristic steps of the present invention will be schematically described with reference to FIG. On one surface of the first substrate 1, a grid-like spacer 5 also serving as a partition separating the small sections 11 is formed. An adhesive layer 9 is formed on the spacer with a flow path 10 as in 1- (a) and 1- (b).

Here, the mode in which the flow channel 10 is formed as a portion having no adhesive layer by patterning has been described. However, the flow channel 10 may be formed as a concave portion by pressing a mold after forming a flat adhesive layer. . The flow path 10
Preferably, at least two or more are provided for one small section so that the step of injecting the liquid dispersion medium or the dispersion system can be performed in a short time and the cost is advantageous.

Next, as in step 2- (a), the substrate 4 is bonded to the bonding layer 9 so as not to impair the function of the flow path 10. In this step, if the adhesive layer 9 has a hot melt property,
By bonding while heating, the surface of the adhesive layer and the substrate can be thermally fused and joined, so that the deformation of the flow path due to the pressing of the substrate can be reduced. In this state, a liquid dispersion medium or a dispersion system is injected into a small area in the display device through the flow path 10.

Then, as shown in step 2- (b), the pressing object 1
3, the adhesive layer 9 is crushed. In the present invention, a mode in which the entire surface is simultaneously pressed by a pressing object having a flat portion is shown. However, for example, a method in which a roller-shaped object is used to sequentially press from the end may be used.

Finally, the flow path 10 is crushed until it is sealed, and the substrate 4 and the spacer 5 are bonded as in step 2- (c). 1- (c) and 1- (d) show the state of the adhesive layer in the final state with the substrate 4 omitted.

In the above-described steps described with reference to 2- (b) and 2- (c), if the adhesive layer 9 has a hot-melt property, the adhesive layer 9 is crushed while being heated, and is subjected to heat fusion bonding. Therefore, even if the adhesive layer 9 is hardened once after the formation of the adhesive layer 9 and the execution of this step after the formation of the adhesive layer 9, the bonding can be performed without any problem. Further, by performing the heat fusion bonding in this manner, better adhesiveness and adhesiveness can be obtained than using an adhesive layer having no hot melt property.

As described above, according to the process characteristic of the present invention, the bonding surface is not exposed to the liquid dispersion medium or the dispersion system, so that it is possible to prevent a decrease in bonding strength. Further, the dispersion system can be sealed in the small area formed between the substrates by the spacer and the adhesive layer, and the charged particles are prevented from moving between the small areas due to the convection of the dispersion system and unevenly distributed. Can be.

A method for manufacturing a display device according to the present invention will be described with reference to FIG. In FIG. 1, 1 is a first substrate, 4 is a second substrate, 2 is a first electrode, 3 is a second electrode, 5 is a spacer, 6
Is a charged particle, 9 is an adhesive layer, 11 is a small section separated by the spacer 5, and 7 is a liquid dispersion medium. Also, 13
Is a pressing object, 14 is a heater, 15 is a vacuum vessel, 16
Means the entire display device.

Step (a) The first electrode 2 is formed on one surface of the first substrate 1 and the spacer 5 is formed on the surface of the first electrode 2. In the present invention, the spacer 5 is patterned into a desired shape, and has a thickness of 10 μm to
It is preferably about 200 μm. Also, the spacer 5 and the first
If the adhesion to the electrode 2 is not good, an adhesive layer (not shown) may be formed between them. As the adhesive used for the adhesive layer, epoxy resin, phenol resin,
A vinyl resin or the like can be used, but the present invention is not limited to this.

Step (b) An adhesive layer 9 is formed on the surface of the spacer 5. The width of the adhesive layer 9 is preferably smaller than the width of the spacer so that the adhesive layer 9 does not protrude from the spacer 5 when the adhesive layer is pressed and deformed in a later step and does not hinder the movement of the charged particles. .

Step (c) The charged particles 6 are evenly distributed to the small sections 11. Distributing the charged particles first as described above means that the charged particles can be easily sealed evenly in all the small regions, and the uneven distribution of the charged particles can be prevented. There is an advantage that there is no problem even if the size is smaller than the size.

Step (d) The second substrate 4 on which the second electrode 3 is formed and the spacer 5 are adhered by the adhesive layer 9. At this time, the surface of the adhesive layer and the second electrode 3 are bonded so as not to impair the function of the flow path provided in the adhesive layer 9 in the previous step.

Step (e) The display device 16 made up to the step (d) is put in the gaseous phase portion of the vacuum vessel 15 containing a necessary and sufficient amount of the liquid dispersion medium. After that, the inside of the vacuum container is evacuated and the display device 1 is evacuated.
6 is submerged in the liquid dispersion medium 7. After that, the vacuum container 15
Is slowly increased to the atmospheric pressure, and the liquid dispersion medium 7 is injected into the display device through a channel provided at an end of the display device 16. In the injection step, by providing a plurality of flow paths in each small area as in the present invention, injection can be performed in a shorter time than in a case where only one flow path is formed in each small area. It can be finished, which is advantageous in terms of cost.

In all the small sections 11, the liquid dispersion medium 7
Is pressed, the pressing object is pressed against one surface of the display device, and the adhesive layer 9 is crushed while pushing out the excess liquid dispersion medium 7 through the flow channel, thereby sealing the flow channel provided in the adhesive layer 9. .

When the adhesive layer 9 has a hot-melt property, this step is performed while heating the adhesive layer 9. In particular, FIG.
In (e), a mode in which all the flow paths are simultaneously sealed by applying a pressing force to the entire surface of the display device while using the heater 14 to heat the adhesive layer 9 using the pressing flat plate 13 having the heater 14. showed that. Regardless of whether or not heating is performed, according to the method in which the pressing force is applied to the entire surface to simultaneously seal all the flow paths, the sealing step can be completed in a short time, and cost is reduced. This is advantageous. Further, the method of heating the adhesive layer in the present invention is not limited to the heat conduction of the heat generated by the heater described above, but may use heat transfer or electromagnetic waves such as infrared rays.

Step (f) The display device 16 is taken out.

Step (g) An electric circuit is connected to the display device 16 to enable display.

In the embodiment of the present invention described above,
The charged particles 6 and the liquid dispersion medium 7 are separated from each other in the display device 16 in different steps.
However, the present invention, as described in detail in Example 3 below, does not perform the step (c),
A dispersion system in which the charged particles 6 and the liquid dispersion medium 7 are mixed in advance is prepared, and this dispersion system is injected into the display device 16 by the same method as the injection method of the liquid dispersion medium in the step (e), and sealing is performed. The present invention also includes a manufacturing method as described above as a preferred embodiment. According to this method, the number of steps can be reduced, the time required for the entire manufacturing process can be reduced, and there is a cost advantage.

In the above embodiment of the present invention, the embodiment in which the first electrode 2 and the second electrode 3 are formed on the first substrate 1 and the second substrate 4 has been described. Electrode 2,
The same manufacturing method can be used even when 3 is formed on the first substrate 1.

In addition, the present invention preferably provides that the substrate has flexibility and the spacer has flexibility because the degree of freedom in the manufacturing process and the shape of the display device is improved. Included as

Further, the present invention covers the electrodes 2 and 3 in order to cover the electrodes 2 and 3 to avoid the danger of occurrence of a problem such as a short circuit.
A preferred embodiment includes attaching an insulating layer (not shown) to the surface of the substrate. For example, an acrylic resin, a polyimide resin, or the like can be used as the insulating layer material.

Examples of materials preferably used are shown below, but the present invention is not limited to these.

As the material of the substrate, a flexible material which improves the degree of freedom in the manufacturing process and the shape of the display device, for example, PET (polyethylene terephthalate) is preferably used.

The materials of the electrodes are Al, Ti, TiC
And a light-transmitting conductive material such as ITO.

As the spacer material, a thick film processing resist or the like can be used. For this purpose, a flexible material that improves the degree of freedom in the manufacturing process and the shape of the display device is preferably used. For example, an ultra-thick chemically amplified photoresist “PMER-3000” manufactured by Tokyo Ohka Kogyo is used. Can be used.

As a material for the adhesive layer, a hot-melt adhesive is preferably used because it has the above-mentioned advantages by having hot-melt properties.

Representative examples of the material of the charged particles include titanium oxide and the like.
Inorganic pigments, dyes, metal powders, fine powders such as glass or resin can be used. Further, a charge control agent and the like are mixed with these as needed.

As the material of the liquid dispersion medium, in addition to water, alcohols, hydrocarbons, halogenated hydrocarbons, etc., various natural or synthetic oils and the like can be used. For example, a dark blue dye consisting of hexylbenzene and oil blue can be used. A solution in which a surfactant is dissolved can be used. A material having an insulating property is preferably used for the purpose of efficiently forming an electric field in a dispersion system.

[0048]

(Embodiment 1) The steps of Embodiment 1 will be described with reference to FIG.

Step (a) PET was used as the first substrate 1, and TiC was sputtered on the upper surface thereof, followed by patterning to form the first electrode 2.
On the upper surface of the electrode plate composed of the first substrate 1 and the first electrode 2, a spacer 5 for enclosing the dispersion system in small sections was formed. Using a photoresist for a thick film as the spacer, a pattern having a film thickness of 50 μm and a width of 100 μm is formed,
A small area of 2.5 mm square was formed as shown in FIG.

Step (b) An adhesive layer 9 was formed on the upper surface of the spacer 5. The adhesive layer 9 was a hot melt adhesive, formed a pattern by printing, and transferred it onto the spacer 5. In forming the adhesive layer, a portion where no adhesive layer was formed was provided for the purpose of using the liquid dispersion medium as a flow path in the liquid dispersion medium injection step. The adhesive layer after transfer has a thickness of 8 μm and a width of 70 μm.
m. The width of the channel was 6 μm, and four channels were provided for one small section.

Step (c) The charged particles 6 were evenly distributed to each small area by printing. As the charged particles 6, titanium oxide having an average particle diameter of 6 μm was used.

Step (d) PET is used as the second substrate 4 and one side of the substrate is made of ITO.
Was sputtered and patterned to form the second electrode 3. The side of the second substrate 4 on which the second electrode 3 was formed was bonded to the spacer 5 with an adhesive layer 9. At this time, the upper surface of the adhesive layer and the second electrode 3 were heat-sealed so as to minimize the deformation of the flow path provided in the adhesive layer 9 in the previous step.

Step (e) Vacuum container 1 containing a necessary and sufficient amount of liquid dispersion medium 7
The display device prepared up to the step (d) was put in the gas phase portion in 5, and the vacuum vessel 15 was evacuated. As the liquid dispersion medium 7, a solution obtained by dissolving a surfactant in a dark blue dye consisting of hexylbenzene and oil blue was used.

Next, with the vacuum chamber kept in a vacuum state,
The display device 16 was submerged in the liquid dispersion medium 7. Then, the pressure in the vacuum vessel 15 was increased to the atmospheric pressure, and the liquid dispersion medium 7 was injected into the display device through a flow path provided at an end of the display device 16.

After injecting the liquid dispersion medium 7 into each small section,
In a state where the display device 16 is immersed in the liquid dispersion medium 7, the pressing object 13 is pressed against the entire surface while heating the adhesive layer portion by the heater 14 from the upper surface of the display device, and the excess liquid dispersion medium 7 is crushed while the adhesive layer 9 is crushed. Was extruded to perform heat fusion bonding between the second substrate 4 and the spacer 5.

Step (f) All the channels provided in the adhesive layer 9 were sealed, and the dispersion system could be sealed in all the small sections. It is conceivable that the adhesive strength is reduced due to the slight presence of the liquid dispersion medium in a part of the part where the flow path was present, but the part where the flow path was smaller than the part that was previously bonded before injection was small, The strength of the substrate was not affected.

Step (g) Display can be performed by connecting an electric circuit to the display device 16. The display was performed by applying a voltage between the electrodes.

In the display device manufactured according to this embodiment, at a driving voltage of 100 V, a display contrast of 4 and a response speed of about 100 msec were obtained. In addition, there is no problem such as separation of the spacer from the substrate at the time of bending the substrate or displacement of the substrate and the spacer, and furthermore, the convection of the dispersed particles between the adjacent small areas causes the charged particles to be removed. A display device which does not move and has excellent holding properties can be manufactured.

Example 2 The steps of Example 2 will be described with reference to FIG.

Step (a) PET was used as the first substrate 1, and ITO was sputtered on the upper surface to form the first electrode 2. A transparent insulating resin layer was formed as an insulating layer 17 on the first electrode. A second patterned TiC film is formed on the insulating layer 17 by sputtering TiC.
Electrode 3 was formed. A spacer 5 for enclosing the dispersion system in small areas was formed on the upper surface. Using a photoresist for a thick film as the spacer, a pattern having a film thickness of 50 μm and a width of 100 μm was formed, and a small area of 2.5 mm □ was formed as shown in FIG.

Steps (b) and (c) These steps are the same as steps (b) and (c) of Example 1, respectively.

Step (d) PET was used as the second substrate 4, and the second substrate 4 and the spacer 5 were bonded by the adhesive layer 9. At this time, the upper surface of the adhesive layer and the second substrate 4 were heat-sealed so as to minimize the deformation of the flow path provided in the adhesive layer 9 in the previous step.

Steps (e) to (g) These steps are the same as steps (e) to (g) in Example 1, respectively.

The display device manufactured according to the present embodiment does not suffer from problems such as separation of the spacer from the substrate and displacement of the spacer from the substrate even when the substrate is bent, similarly to the first embodiment. In addition, a display device with excellent holding properties, in which charged particles did not move due to convection of the dispersion system between adjacent small sections, could be manufactured.

Example 3 The steps of Example 3 will be described with reference to FIG.

Step (a) PET was used as the first substrate 1, and TiC was sputtered on the upper surface thereof, followed by patterning to form the first electrode 2.
On the electrode plate composed of the first substrate 1 and the first electrode 2, a spacer 5 for dividing and enclosing the dispersion system into small sections was formed. Using a photoresist for a thick film as a spacer, a pattern having a film thickness of 50 μm and a width of 100 μm is formed,
The small area of □ was formed as shown in FIG.

Step (b) An adhesive layer 9 was formed on the upper surface of the spacer 5. The adhesive layer 9 was a hot melt adhesive, formed a pattern by printing, and transferred it onto the spacer 5. In forming the adhesive layer, a portion where no adhesive layer was formed was provided for the purpose of using the liquid dispersion medium as a flow path in the liquid dispersion medium injection step. The adhesive layer after transfer has a thickness of 8 μm and a width of 70 μm.
m. The width of the channel was 6 μm, and four channels were provided for one small section.

Step (c) PET is used as the second substrate 4 and one side of the substrate is made of ITO.
Was sputtered and patterned to form the second electrode 3. The side of the second substrate 4 on which the second electrode 3 was formed was bonded to the spacer 5 with an adhesive layer 9. At this time, the upper surface of the adhesive layer and the second electrode 3 were heat-sealed so as to minimize the deformation of the flow path provided in the adhesive layer 9 in the previous step.

Step (d) A gas phase portion in the vacuum vessel 15 into which a necessary and sufficient amount of a dispersion system composed of the charged particles 6 and the liquid dispersion medium 7 has been injected,
The display device created up to the step (c) was inserted, and the vacuum container 15 was evacuated. As the charged particles 6, an average particle diameter of 6
As the liquid dispersion medium 7, titanium oxide of μm was used in which a surfactant was dissolved in a dark blue dye consisting of hexylbenzene and oil blue.

Next, with the vacuum chamber kept in a vacuum state,
The display device 16 was submerged in the liquid dispersion medium 7. Then, the pressure in the vacuum vessel 15 was increased to the atmospheric pressure, and the dispersion system 7 was injected into the display device 16 through a channel provided at an end of the display device 16.

After the dispersion system 7 is injected into each of the small sections, the pressing object 13 is pressed against the entire surface of the display device 16 while the adhesive layer is heated by the heater 14 from the upper surface of the display device in a state of being immersed in the dispersion system 7. Then, the excess dispersion system was extruded while crushing the adhesive layer 9, and the second substrate 4 and the spacer 5 were thermally fused and joined.

Step (e) All the channels provided in the adhesive layer 9 were sealed, and the dispersion system could be sealed in all the small sections. It is conceivable that the adhesive strength is reduced due to the slight presence of the liquid dispersion medium in a part of the part where the flow path was present, but the part where the flow path was narrower than the part that was previously adhered before injection, The strength of the substrate was not affected.

Step (f) An electric circuit can be connected to this for display. The display was performed by applying a voltage between the electrodes.

In the display device manufactured according to the present embodiment, similarly to the first embodiment, there is no problem that the spacer is peeled off from the substrate even when the substrate is bent, and the displacement between the substrate and the spacer does not occur. In addition, a display device having excellent holding properties, in which charged particles do not move due to the convection of the dispersion system between adjacent small sections, could be manufactured.

[0075]

As described above, by using the method of manufacturing a display device of the present invention, a display device having high resistance to peeling of a spacer from a substrate due to stress at the time of bending a substrate and displacement between the substrate and the spacer can be obtained. can get. Further, a display device having no display unevenness and having excellent display holding characteristics by eliminating uneven distribution of charged particles can be obtained.

[Brief description of the drawings]

FIG. 1 shows an example of a manufacturing process of a display device of the present invention.

FIG. 2 shows an example of a manufacturing process of the display device of the present invention.

FIG. 3 shows an example of a manufacturing process of the display device of the present invention.

FIG. 4 shows a conceptual diagram of a characteristic process of the manufacturing method of the present invention.

FIG. 5 shows a conventional electrophoretic display device.

FIG. 6 shows a part of a manufacturing process of a conventional electrophoretic display device.

[Explanation of symbols]

 1, 22 First substrate 2 First electrode 3 Second electrode 4 Second substrate 5 Spacer 6 Charged particle 7 Liquid dispersion medium 9, 23 Adhesive layer 10 Flow path 11 Small area 13 Pressing object 14 Heater 15 Vacuum container 16 Electrophoresis Display device 17 Insulating layer 20 Porous spacer 21 Dispersion system 24 Flexible substrate 25 Heating roller

Claims (7)

[Claims] A first substrate and a second substrate which are arranged to face each other;
And a spacer also serving as a partition for forming a plurality of small sections between the opposed substrates, an adhesive layer for bonding the spacer to the second substrate, and a liquid dispersion sealed in the small section. A dispersion system in which charged particles are dispersed in a medium; and a first electrode and a second electrode for applying a voltage to the dispersion system, and a voltage applied between the first electrode and the second electrode What is claimed is: 1. A method for manufacturing a display device for displaying an image by moving charged particles by a generated electric field, comprising: a flow path communicating between said small areas and said small area on the spacer formed on one surface of a first substrate. Forming an adhesive layer while leaving, a step of distributing the charged particles to the small area, a step of bonding a second substrate on the adhesive layer while maintaining a flow path, and through the flow path The liquid dispersing medium is Method of manufacturing a display device for implanting the band, a step of sealing the flow path by crushing the adhesive layer formed of the flow path, characterized in that at least. 2. A first substrate and a second substrate which are arranged to face each other.
And a spacer also serving as a partition for forming a plurality of small sections between the opposed substrates, an adhesive layer for bonding the spacer to the second substrate, and a liquid dispersion sealed in the small section. A dispersion system in which charged particles are dispersed in a medium; and a first electrode and a second electrode for applying a voltage to the dispersion system, and a voltage applied between the first electrode and the second electrode What is claimed is: 1. A method for manufacturing a display device for displaying an image by moving charged particles by a generated electric field, comprising: a flow path communicating between said small areas and said small area on the spacer formed on one surface of a first substrate. Forming an adhesive layer while leaving a channel, bonding a second substrate on the adhesive layer while maintaining the flow path, and dispersing the dispersion system into the small area in the display device through the flow path. The step of injecting and forming the flow channel Method for manufacturing a display device characterized in that it comprises at least a step of sealing the flow path by crushing adhesive layer. 3. The method according to claim 1, wherein the adhesive layer has a hot-melt property. 4. In the step of sealing the flow path, the adhesive layer formed with the flow path is softened by heating, and the flow path is sealed by crushing the adhesive layer. The method for manufacturing a display device according to claim 3. 5. A squeezing of the adhesive layer in which the flow path is formed is performed by a flat portion capable of completely covering a portion where a small area of the display device is formed and a portion around the portion where the adhesive layer is formed. The method according to any one of claims 1 to 4, wherein the pressing is performed using a pressing object, and all the flow paths are simultaneously sealed. 6. The method of manufacturing a display device according to claim 1, wherein a plurality of flow paths are provided for each of the small sections. 7. A first substrate and a second substrate arranged to face each other.
And a spacer also serving as a partition for forming a plurality of small sections between the opposed substrates, an adhesive layer for bonding the spacer to the second substrate, and a liquid dispersion sealed in the small section. A dispersion system in which charged particles are dispersed in a medium; and a first electrode and a second electrode for applying a voltage to the dispersion system, and a voltage applied between the first electrode and the second electrode A display device for performing display by moving charged particles by an electric field generated, wherein the display device is manufactured by the method for manufacturing a display device according to any one of claims 1 to 6.