JP2013225065A - Electrophoretic display device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrophoretic display device that is provided with partition walls or a porous member, can reduce loss of display and can consequently increase contrast, and further to provide an electronic apparatus.SOLUTION: An electrophoretic display device 10 comprises: a counter substrate 3 having a common electrode 4 on a surface 3a; a pixel substrate 1 that is installed apart from the counter substrate 3 and has pixel electrodes 2 on a surface 1a opposite to the surface 3a; partition walls 8 that partition a space between the counter substrate 3 and pixel substrate 1 into a plurality of cells 11; and a dispersion liquid 5 that is filled in each of the plurality of cells 11 and has electrophoretic particles 6. The partition walls 8 are installed at a surface 3a side via a spacer layer 9a. The spacer layer 9a has fibers 9b and spaces 9c among the fibers 9b. As viewed from a normal direction of the counter substrate 3, an area of each of the fibers 9b is smaller than an area of an end surface 8a of each of the partition walls 8.

Description

  The present invention relates to an electrophoretic display device and an electronic apparatus.

As an electrophoretic display device (EPD) according to the prior art, there is one disclosed in Patent Document 1, for example.
As shown in FIG. 7, the electrophoretic display device includes, for example, a pixel substrate 1, a counter substrate 3, a dispersion liquid 5 containing electrophoretic particles 6, and a pair of electrodes (pixels) that apply an electric field to the dispersion liquid 5. Some include an electrode 2 and a common electrode 4) and a partition wall 8 forming a plurality of cells 11.

JP 2011-248065 A

In the electrophoretic display device described above, for example, a rib (end surface) 8 a of the partition wall 8 is provided on the counter substrate 3 via the common electrode 4. In this case, the end surface 8a may be visually recognized from the counter substrate 3 side (display surface side). This visually recognized area may be an area that does not contribute to display, that is, a so-called display loss (see FIG. 2A). In this case, since the ratio of the display area in the entire display surface becomes small, there is a problem that it is difficult to increase the contrast of the electrophoretic display device.
Therefore, the present invention has been made in view of the above-described problems, and is an electrophoretic display device provided with a partition wall or a porous member, which can reduce display loss and, as a result, increase the contrast. An object of the present invention is to provide an electrophoretic display device and an electronic apparatus.

  In one embodiment of the present invention for solving the above-described problem, a first substrate having a first electrode on a first surface and a first substrate that is spaced apart from the first substrate and faces the first surface A second substrate having a second electrode on the second surface, a partition partitioning the plurality of cells between the first substrate and the second substrate, and filling each of the plurality of cells A dispersion liquid having electrophoretic particles, wherein the partition wall is disposed on the first surface side through a first spacer layer, and the first spacer layer includes a first spacer layer and a first spacer layer. A first gap between the first spacers, and an area occupied by the first spacer is smaller than an area of the partition wall when viewed from the normal direction of the first substrate. This is an electrophoretic display device.

  In such a structure, since the first spacer is disposed between the partition wall and the first substrate, when viewed from the normal direction of the first substrate, the first spacer is more than the partition wall. The spacer is more visible. And since the area which the 1st spacer sees from the normal line direction of the 1st board | substrate is smaller than the area of a partition (end surface), the loss of a display can be reduced compared with a prior art. Therefore, since the display area can be enlarged (the ratio of the display area in the entire display surface can be increased), the electrophoretic display device can be made high in contrast.

  In addition, as the above-mentioned “first substrate”, “opposed substrate 3” is illustrated in the embodiment described later. In addition, as the “first surface”, “surface 3a” is illustrated in the embodiment described later. In addition, as the “first electrode”, the “common electrode 4” is illustrated in the embodiments described later. In addition, as the “second substrate”, “pixel substrate 1” is illustrated in an embodiment described later. In addition, as the “second surface”, “surface 1a” is illustrated in the embodiment described later. In addition, as the “second electrode”, “pixel electrode 2” is exemplified in the embodiments described later. In addition, as the “first spacer layer”, a “spacer layer 9a” is exemplified in the embodiments described later. Further, as the “first spacer”, “spacer (fiber) 9b” is exemplified in the embodiments described later. In addition, as the above-mentioned “gap”, “gap 9c” is exemplified in the embodiments described later.

In another aspect of the present invention, the first spacer may be formed of a plurality of fibers.
With such a structure, since the first spacer is formed of a plurality of fibers, the formation thereof is facilitated.
In another aspect of the present invention, the thickness of the first spacer layer may be equal to or greater than the average particle diameter of the electrophoretic particles.
With such a structure, since the thickness of the first spacer layer is equal to or greater than the average particle diameter of the electrophoretic particles, there is a possibility that the electrophoretic particles remain sandwiched between the first substrate and the partition wall. Can be reduced. For this reason, it is possible to reduce display loss caused by electrophoretic particles remaining between the first substrate and the partition walls. In addition, with the above structure, electrophoretic particles can be disposed between the first substrate and the partition wall. In this case, since the electrophoretic particles can contribute to display, display loss can be further reduced.

In another aspect of the present invention, the first spacer may be formed of an insulating member.
With such a structure, since the first spacer is formed of an insulating member, the possibility of short-circuiting can be reduced even if a part of the first spacer contacts the conductive member. .
According to another aspect of the present invention, the partition wall is disposed on the second surface side via a second spacer layer, and the second spacer layer includes the second spacer and the second spacer layer. And an area occupied by the second spacer when viewed from the normal direction of the second substrate may be smaller than the area of the partition wall.

In such a structure, since the second spacer is disposed between the partition wall and the second substrate, when viewed from the normal direction of the second substrate, the second spacer is more than the partition wall. The spacer is more visible. And since the area which the 2nd spacer sees from the normal line direction of the 2nd board | substrate is smaller than the area of a wall surface (the end surface), the loss of a display can be reduced compared with a prior art. Therefore, since the display area can be enlarged, the electrophoretic display device can be made high contrast.
As the above-mentioned “second spacer layer”, a “spacer layer 9d” is exemplified in the embodiments described later. In addition, as the “second spacer”, “spacer (fiber) 9e” is exemplified in the embodiments described later.

In another aspect of the present invention, the second spacer may be formed of a plurality of fibers.
With such a structure, since the second spacer is formed of a plurality of fibers, the formation thereof is facilitated.
In another aspect of the present invention, the thickness of the second spacer layer may be greater than or equal to the average particle diameter of the electrophoretic particles.
With such a structure, since the thickness of the second spacer layer is equal to or greater than the average particle diameter of the electrophoretic particles, there is a possibility that the electrophoretic particles may remain between the second substrate and the partition wall. Can be reduced. For this reason, display loss caused by electrophoretic particles remaining between the second substrate and the partition walls can be reduced. In addition, with the above structure, electrophoretic particles can be arranged between the second substrate and the partition wall. In this case, since the electrophoretic particles can contribute to display, display loss can be further reduced.

In another aspect of the present invention, the second spacer may be formed of an insulating member.
With such a structure, since the second spacer is formed of an insulating member, the possibility of short-circuiting can be reduced even if a part of the second spacer contacts the conductive member. .

  According to another aspect of the present invention, there is provided a first substrate having a first electrode on a first surface, and a second substrate disposed away from the first substrate and facing the first surface. A second substrate having a second electrode on its surface, a porous member provided between the first substrate and the second substrate and having a plurality of communicating holes, and the plurality of holes A dispersion liquid having electrophoretic particles filled therein, and the porous member is disposed on the first surface side through a first spacer layer, and the first spacer layer includes: An area occupied by the first spacer when viewed from the normal direction of the first substrate, the first spacer and a first gap between the first spacers, The electrophoretic display device is smaller than the area of the member.

With such a structure, since the first spacer is installed between the porous member and the first substrate, when viewed from the normal direction of the first substrate, However, the first spacer is more visible. And since the area of the 1st spacer seen from the normal line direction of the 1st board | substrate is smaller than the area of a porous member, the loss of a display can be reduced compared with a prior art. Therefore, the display area can be enlarged, and the electrophoretic display device can be made high contrast.
The above-mentioned “porous member” means a member having a large number of fine holes.

Another embodiment of the present invention is an electronic device including the electrophoretic display device according to the above embodiment.
With such a structure, since the above-described electrophoretic display device is provided, display loss can be reduced, and as a result, an electronic apparatus capable of achieving high contrast can be realized.

1 is a cross-sectional view schematically showing an electrophoretic display device according to a first embodiment of the invention. The top view which shows typically the part which the loss of display produced. Sectional drawing which shows typically the modification of the electrophoretic display device which concerns on 1st Embodiment of this invention. Sectional drawing which shows typically the modification of the electrophoretic display device which concerns on 1st Embodiment of this invention. Sectional drawing which shows typically the modification of the electrophoretic display device which concerns on 1st Embodiment of this invention. The perspective view which shows the structural example of the electronic paper which concerns on 2nd Embodiment of this invention. Sectional drawing which shows typically the electrophoretic display device which concerns on a prior art.

Hereinafter, an electrophoretic display device according to an embodiment of the present invention and modifications thereof will be described with reference to the drawings. However, the present invention is not limited only to the following embodiments. Moreover, this invention includes what combined the following embodiment freely.
(1) First Embodiment FIG. 1 is a cross-sectional view schematically showing an electrophoretic display device 10 according to this embodiment. As shown in FIG. 1, the electrophoretic display device 10 includes a pixel substrate 1, a pixel electrode 2, a counter substrate 3, a common electrode 4, a dispersion liquid 5, a partition wall 8, and a spacer layer 9a. It consists of Hereinafter, each component will be described.

(Pixel substrate 1 and pixel electrode 2)
The pixel substrate 1 is a substrate including a pixel electrode 2 and a drive circuit (not shown) for controlling a voltage applied to the pixel electrode 2, and is made of, for example, a flat plate member. The pixel substrate 1 includes a surface 1a and a surface 1b opposite to the surface 1a. A pixel electrode 2 is formed on the surface 1 a of the pixel substrate 1. A drive circuit (not shown) is formed on the surface 1b side of the pixel substrate 1.
The pixel electrode 2 is an electrode for applying an electric field to the dispersion 5 described later, and is made of, for example, a flat conductive member. For example, a plurality of pixel electrodes 2 are formed on the surface 1 a of the pixel substrate 1. And each pixel electrode 2 is formed in the surface 1a at equal intervals, for example. Each pixel electrode 2 corresponds to each pixel, for example. For this reason, an independent voltage can be applied to each pixel electrode 2.

(Counter substrate 3 and common electrode 4)
The electrophoretic display device 10 according to the present embodiment uses the counter substrate 3 as a display surface. The counter substrate 3 is a substrate placed away from the pixel substrate 1 and facing the surface 1a of the pixel substrate 1, and is made of, for example, a flat transparent member. The counter substrate 3 is a substrate including a surface 3 a facing the surface 1 a of the pixel substrate 1.
The common electrode 4 is an electrode disposed on the surface 3a of the counter substrate 3 so as to face the pixel electrode 2, and is made of, for example, a flat transparent member (ITO). The common electrode 4 is an electrode for applying an electric field to the dispersion 5 described later, and is made of, for example, a flat conductive member. For example, the common electrode 4 is formed so as to cover the entire surface 3 a of the counter substrate 3. For this reason, a common voltage can be applied to the common electrode 4.

(Dispersion 5)
The dispersion liquid 5 is a liquid containing electrophoretic particles 6 and a dispersion medium (not shown). The dispersion 5 is filled in a cell 11 formed by the pixel substrate 1, the counter substrate 3, and a partition wall 8 described later. The dispersion 5 is in contact with, for example, the pixel electrode 2 and the common electrode 4.
The electrophoretic particles 6 are particles that can migrate in the dispersion medium when an electric field is applied between the pixel electrode 2 and the common electrode 4, for example, charged particles. In FIG. 1, black particles 6 a and white particles 6 b are illustrated as the electrophoretic particles 6.

(Partition 8)
The partition wall 8 is a wall for partitioning the pixel substrate 1 and the counter substrate 3 into a plurality of cells 11. FIG. 1 shows a plurality of flat partition walls 8. The partition wall 8 includes an end surface 8 a that faces the surface 3 a of the counter substrate 3. This end face 8 a is located away from the counter substrate 3. Moreover, the partition 8 is provided with the end surface 8b on the opposite side to the end surface 8a.

The end face 8a of the partition wall 8 is disposed on the counter substrate 3 via a spacer layer 9a described later. Further, the end face 8 b of the partition wall 8 is disposed in contact with the pixel substrate 1. The partition wall 8 is formed between the pixel electrodes 2, for example. The partition wall 8 may be a wall that can form the cell 11, for example, a wall formed of an epoxy resin.
The form of the cell 11 may be a communication type cell having an opening in the partition wall 8 or a non-communication type cell having no opening in the partition wall 8.

(Spacer layer 9a)
The spacer layer 9 a is disposed on the surface 3 a side of the counter substrate 3. As described above, the partition wall 8 is disposed between the pixel substrate 1 and the counter substrate 3 via the spacer layer 9a. The spacer layer 9 a has a function of maintaining a constant distance between the surface 3 a of the counter substrate 3 and the end surface 8 a of the partition wall 8.
The spacer layer 9a has a spacer 9b. The spacer 9b is formed of a fiber, for example. In the spacer layer 9a, the fibers 9b may be irregularly arranged or may be regularly arranged. The spacer layer 9a may be formed of one fiber 9b or may be formed of a plurality of fibers 9b. The spacer 9b is not limited to fibers. What is necessary is just to be able to form a gap 9c described later in the spacer layer 9a.

The material of the fiber 9b may be an organic material or an inorganic material. Moreover, the fiber 9b may be formed of an insulating member.
The thickness of the spacer layer 9a is equal to or greater than the average particle diameter of the electrophoretic particles 6, and is, for example, in the range of 1 to 50 times the average particle diameter of the electrophoretic particles 6.

In addition, the area occupied by the fibers 9 b that are visible when viewed from the normal direction of the counter substrate 3 is smaller than the area of the end face 8 a of the partition wall 8.
The spacer layer 9a has a gap 9c through which the electrophoretic particles 6 can move. The shape of the gap 9c is not particularly limited. For example, the gap 9c having an irregular shape as a whole may be used, or the gap 9c having a regular shape may be used.
Examples of the method for forming the spacer layer 9a include the following methods. First, a solution in which the fibers 9b constituting the spacer layer 9a are dispersed is applied to the surface 3a side of the counter substrate 3. Thereafter, the solution is dried. Thus, the spacer layer 9a is formed on the surface 3a side of the counter substrate 3. Finally, the electrophoretic display device 10 is formed by bonding the counter substrate 3 on which the spacer layer 9a is formed and the partition wall 8 together.

FIG. 1 illustrates the state of the fibers 9b sandwiched between the surface 3a of the counter substrate 3 and the end surface 8a of the partition wall 8. Although FIG. 1 shows one fiber 9b sandwiched between the surface 3a of the counter substrate 3 and the end surface 8a of the partition wall 8, it is not limited to this. For example, a plurality of fibers 9 b may be sandwiched between the surface 3 a of the counter substrate 3 and the end surface 8 a of the partition wall 8.
Hereinafter, display loss of the electrophoretic display device 10 according to the present embodiment and the electrophoretic display device according to the related art will be described with reference to FIG. FIG. 2A shows a display loss in an electrophoretic display device according to the prior art (for example, an electrophoretic display device in which the end surface 8a of the partition wall 8 is installed on the surface 3a of the counter substrate 3 via the common electrode 4). It is a figure which shows a part. A white line portion 15a (a portion corresponding to the end face 8a) in FIG. 2A is a portion that causes a display loss. On the other hand, FIG. 2B is a diagram illustrating a portion that causes a display loss in the electrophoretic display device 10 according to the present embodiment. A white line portion 15b (a portion corresponding to the fiber 9b) in FIG. 2B is a display loss portion. In FIGS. 2A and 2B, the portion that becomes the display region is expressed as “the portion 14 that becomes the display region”.

  As described above, in the electrophoretic display device 10 according to the present embodiment, the spacer layer 9 a is provided between the end face 8 a of the partition wall 8 and the counter substrate 3. For this reason, when viewed from the normal direction of the counter substrate 3, the fibers 9 b are more visible than the end face 8 a of the partition wall 8. And since the area which the fiber 9b visually recognized when it sees from the normal line direction of the opposing board | substrate 3 is smaller than the area of the end surface 8a of the partition 8, compared with a prior art, the loss of a display is reduced. Can be reduced. Therefore, since the display area can be enlarged (the ratio of the display area in the entire display surface can be increased), the electrophoretic display device can be made high in contrast.

  Further, in the case of the electrophoretic display device 10, the spacer layer 9 a has a thickness equal to or greater than the average particle diameter of the electrophoretic particles 6, so that the electrophoretic particles 6 remain between the counter substrate 3 and the end surface 8 a. The possibility of doing so can be reduced. In the case of the electrophoretic display device 10, the electrophoretic particles 6 may be disposed between the counter substrate 3 and the partition wall 8. Since the electrophoretic particles 6 can contribute to display, display loss can be further reduced.

In the present embodiment, the spacer layer 9a described above and a spacer layer 9d described later are collectively referred to as “spacer layer 9”.
Hereinafter, modified examples 1 to 3 of the electrophoretic display device 10 will be described with reference to FIGS. explain. In the first to third modifications, the same components as those of the electrophoretic display device 10 may be denoted by the same reference numerals, and redundant descriptions may be omitted.

(Modification 1)
In the electrophoretic display device 10, the case where the end face 8b is in contact with the pixel substrate 1 has been described, but the present invention is not limited to this. For example, the end face 8b may be installed away from the pixel substrate 1. In this case, the partition wall 8 is disposed on the surface 1a of the pixel substrate 1 via the spacer layer 9d. An electrophoretic display device 20 according to this embodiment is illustrated in FIG.

The spacer layer 9d can use the same member as the spacer layer 9a described above. That is, the spacer layer 9d has a spacer 9e, and the spacer 9e is made of, for example, a fiber. In the spacer layer 9d, the fibers 9e may be irregularly arranged or may be regularly arranged. The spacer layer 9d may be formed of one fiber 9e, or may be formed of a plurality of fibers 9e. The spacer 9e is not limited to fibers. What is necessary is just to be able to form a gap described later in the spacer layer 9d.
The material of the fiber 9e may be an organic material or an inorganic material. The fiber 9e may be formed of an insulating member.
The thickness of the spacer layer 9d is equal to or greater than the average particle diameter of the electrophoretic particles 6, and is, for example, in the range of 1 to 50 times the average particle diameter of the electrophoretic particles 6.

In addition, the area of the fiber 9 e that is visible when viewed from the normal direction of the pixel substrate 1 is smaller than the area of the end face 8 b of the partition wall 8.
The spacer layer 9d has a gap (not shown) through which the electrophoretic particles 6 can move. The shape of the gap is not particularly limited. For example, it may be a gap having an irregular shape as a whole, or a gap having a regular shape.

Further, the spacer layer 9d has the same function as the spacer layer 9a. That is, the spacer layer 9d has a function of keeping the distance between the surface 1a of the pixel substrate 1 and the end surface 8b of the partition wall 8 constant.
In the case of the electrophoretic display device 20 according to the first modification, a spacer layer 9 d is provided between the end face 8 b of the partition wall 8 and the pixel substrate 1. For this reason, if the pixel substrate 1 and the pixel electrode 2 are formed of a transparent member, the fiber 9e is more visible than the end face 8b of the partition wall 8 when viewed from the normal direction of the pixel substrate 1. And since the area of the fiber 9e visually recognized when it sees from the normal line direction of the pixel substrate 1 is smaller than the area of the end surface 8b of the partition 8, it reduces a display loss compared with a prior art. it can. Therefore, according to this modification, the display area can be enlarged on the pixel substrate 1 side and the counter substrate 3 side, and the electrophoretic display device can be made high contrast.

(Modification 2)
In the electrophoretic display device 10, the case where the partition wall 8 is provided has been described, but the present invention is not limited to this. Instead of the partition wall 8, a bead 12 may be used. In this case, the beads 12 are placed on the surface 3a of the counter substrate 3 via the spacer layer 9a. An electrophoretic display device 30 according to this embodiment is illustrated in FIG.

In the case of the electrophoretic display device 30 according to the modified example 2, a spacer layer 9a is provided between the bead 12 and the counter substrate 3. For this reason, it is possible to reduce the possibility that the electrophoretic particles 6 remain between the counter substrate 3 and the beads 12. Therefore, even in this modification, the display area can be enlarged, so that the electrophoretic display device can be made high in contrast.
In addition, although this modification demonstrated the case where only the spacer layer 9a was installed, the spacer layer 9a and the spacer layer 9d may be installed, for example. In this case, if the pixel substrate 1 and the pixel electrode 2 are formed of a transparent member, the display area can be enlarged also on the pixel substrate 1 side and the counter substrate 3 side.

(Modification 3)
In the electrophoretic display device 10, the case where the partition wall 8 is provided has been described, but the present invention is not limited to this. Instead of the partition wall 8, for example, a porous member 13 having a plurality of communicating holes may be used. An electrophoretic display device 40 according to this embodiment is illustrated in FIG.
In the electrophoretic display device 40 according to Modification 3, each of the plurality of holes provided in the porous member 13 is filled with the electrophoretic particles 6. The porous member 13 is installed on the surface 3a of the counter substrate 3 through the spacer layer 9a. The porous member 13 includes a surface 13 a that faces the counter substrate 3. And the area of the fiber 9b visually recognized when it sees from the normal line direction of the opposing board | substrate 3 is smaller than the area of the surface 13a of the porous member 13. FIG.

  In the case of the electrophoretic display device 40, a spacer layer 9 a is installed between the surface 13 a of the porous member 13 and the counter substrate 3. For this reason, when viewed from the normal direction of the counter substrate 3, the spacer layer 9 a is more visible than the surface 13 a of the porous member 13. And since the area of the fiber 9b visually recognized when it sees from the normal line direction of the opposing board | substrate 3 is smaller than the area of the surface 13a of the porous member 13, it is a display loss compared with a prior art. Can be reduced. Therefore, even in this modification, the display area can be enlarged, so that the electrophoretic display device can be made high in contrast.

In addition, although this modification demonstrated the case where only the spacer layer 9a was installed, the spacer layer 9a and the spacer layer 9d may be installed, for example. In this case, if the pixel substrate 1 and the pixel electrode 2 are formed of a transparent member, the display area can be enlarged also on the pixel substrate 1 side and the counter substrate 3 side.
The porous member 13 described above may be a member provided with a plurality of communicating holes through which the electrophoretic particles 6 can move, and FIG. 5 illustrates a member formed including, for example, the fibers 13b. ing.

(2) Second Embodiment Next, a case where the electrophoretic display device 10 according to the first embodiment described above is applied to an electronic device will be described.
FIG. 6A is a perspective view illustrating a configuration example of the electronic paper 100 according to the second embodiment of the present invention. The electronic paper 100 includes the electrophoretic display device 10 described in the first embodiment in the display area 101. Since the pixel substrate 1 and the counter substrate 3 are each made of a flexible material, the electronic paper 100 is flexible, and is made of a rewritable sheet having the same texture and flexibility as conventional paper. The main body 102 is provided.

  FIG. 6B is a perspective view illustrating a configuration example of the electronic notebook 200. An electronic notebook 200 is obtained by bundling a plurality of the electronic papers 100 and sandwiching them between covers 201. The cover 201 includes display data input means (not shown) for inputting display data sent from an external device, for example. Thereby, according to the display data, the display content can be changed or updated while the electronic paper is bundled.

  According to the electronic paper 100 and the electronic notebook 200 according to the second embodiment of the present invention, the electrophoretic display device 10 according to the first embodiment of the present invention is provided. For this reason, the same effect as that of the first embodiment is achieved, and an electronic apparatus including a display unit having excellent image retention characteristics and excellent display quality is obtained. Note that the electronic paper 100 and the electronic notebook 200 described above are examples of the electronic apparatus according to the present invention, and do not limit the scope of application of the present invention. For example, the electrophoretic display device 10 can be suitably used for a display unit of an electronic device such as a mobile phone or a portable audio device. Moreover, the electrophoretic display devices 20, 30, and 40 which are modifications of the electrophoretic display device 10 are not limited to the above-described electrophoretic display device 10, and can be suitably used for the display unit of the electronic apparatus.

(Other effects)
Among the operational effects of the electrophoretic display device 10 according to the embodiment of the present invention, operational effects other than the operational effects described above will be described below.
In the case of the electrophoretic display device 10 according to the present embodiment, since the partition wall 8 is provided, there is little possibility that the electrophoretic particles 6 are biased due to sedimentation. Therefore, as compared with an electrophoretic display device that does not include the partition wall 8, display unevenness due to sedimentation of the electrophoretic particles 6 can be reduced, and display reliability can be improved.

In addition, in the electrophoretic display device 10 according to the present embodiment, only the current caused by the conductivity of the dispersion 5 flows. Therefore, for example, power consumption can be reduced as compared with an electrophoretic display device (microcapsule type electrophoretic display device) including a binder.
Further, in the electrophoretic display device 10 according to the present embodiment, a binder for fixing the microcapsules is not necessary. Accordingly, the number of components can be reduced as compared with a microcapsule type electrophoretic display device using a binder. Therefore, the reliability as a product can be improved.

  1 pixel substrate, 1a surface, 1b surface, 2 pixel electrodes, 3 counter substrate, 3a surface, 4 common electrode, 5 dispersion, 6 electrophoretic particles, 6a black particles, 6b white particles, 8 partition walls, 8a end surface, 8b end surface , 9 Spacer layer, 9a Spacer layer, 9b Spacer (fiber), 9c Gap, 9d Spacer layer, 9e Spacer (fiber), 10 Electrophoretic display device, 11 cell, 12 beads, 13 porous member, 13a surface, 13b fiber , 14 Display area portion, 15a White line portion, 15b White line portion, 20 Electrophoretic display device, 30 Electrophoretic display device, 40 Electrophoretic display device, 100 Electronic paper, 101 Display region, 102 Main body, 200 Electronic notebook, 201 cover

Claims (10)

A first substrate having a first electrode on a first surface;
A second substrate disposed away from the first substrate and having a second electrode on a second surface facing the first surface;
A partition partitioning a plurality of cells between the first substrate and the second substrate;
A dispersion having electrophoretic particles filled in each of the plurality of cells,
The partition is disposed on the first surface side through a first spacer layer,
The first spacer layer has a first spacer and a first gap between the first spacers;
The electrophoretic display device, wherein an area occupied by the first spacer is smaller than an area of the partition wall when viewed from a normal direction of the first substrate.   The electrophoretic display device according to claim 1, wherein the first spacer is formed of a plurality of fibers.   The electrophoretic display device according to claim 1, wherein a thickness of the first spacer layer is equal to or greater than an average particle diameter of the electrophoretic particles.   The electrophoretic display device according to any one of claims 1 to 3, wherein the first spacer is formed of an insulating member. The partition is disposed on the second surface side through a second spacer layer,
The second spacer layer has a second spacer and a second gap between the second spacers;
The area occupied by the second spacer when viewed from the normal direction of the second substrate is smaller than the area of the partition wall, according to any one of claims 1 to 4. Electrophoretic display device.   The electrophoretic display device according to claim 5, wherein the second spacer is formed of a plurality of fibers.   The electrophoretic display device according to claim 5, wherein a thickness of the second spacer layer is equal to or greater than an average particle diameter of the electrophoretic particles.   The electrophoretic display device according to claim 5, wherein the second spacer is formed of an insulating member. A first substrate having a first electrode on a first surface;
A second substrate disposed away from the first substrate and having a second electrode on a second surface facing the first surface;
A porous member provided between the first substrate and the second substrate and having a plurality of communicating holes;
A dispersion liquid having electrophoretic particles filled in each of the plurality of holes,
The porous member is disposed on the first surface side through a first spacer layer,
The first spacer layer has a first spacer and a first gap between the first spacers;
The electrophoretic display device, wherein an area occupied by the first spacer is smaller than an area of the porous member when viewed from a normal direction of the first substrate.   An electronic apparatus comprising the electrophoretic display device according to any one of claims 1 to 9.

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