JP5487993B2 - Electrophoretic display device and electronic apparatus - Google Patents

Description

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

  Conventionally, as a moisture-proof measure against an electrophoretic element, an electrophoretic element in which a plurality of microcapsules are arranged on a transparent substrate is sandwiched between a pair of glass substrates, and a sealing member such as an epoxy disposed between the glass substrates Thus, the entire periphery of the electrophoretic element is sealed (for example, Patent Document 1).

JP 2009-145833 A

  The thermal expansion coefficient of the epoxy resin material constituting the sealing member is higher than the thermal expansion coefficient of the transparent substrate or the glass substrate, and is about the same as PL. For this reason, when left in a low temperature environment, the sealing member contracts. Due to such a difference in thermal expansion coefficient, a local stress is generated between the glass substrate and the sealing member, and a concentrated load is generated at the boundary portion between the electrophoretic element and the sealing member on the glass substrate. Phenomenon such as cracking sometimes occurred.

  The present invention has been made in view of the above-mentioned problems of the prior art, and relaxes the concentrated load (stress) on the glass substrate generated when the sealing member is thermally contracted in a low temperature environment to prevent cracking. An object of the present invention is to provide an electrophoretic display device and an electronic device that can be used.

In order to solve the above-described problems, an electrophoretic display device of the present invention includes an electrophoretic element sandwiched between a first substrate and a second substrate formed larger than the first substrate in plan view. In the electrophoretic display device, a glass substrate provided on a surface of the first substrate opposite to the second substrate and formed larger than the first substrate in plan view, the glass substrate, and the second substrate A sealing member that is disposed in contact with these substrates and seals the electrophoretic element between the glass substrate and the second substrate, and the glass substrate of the first substrate, An inclined portion that is inclined with respect to the thickness direction of the first substrate is provided on at least one side of the opposite surface, and a gap is formed in a region surrounded by the inclined portion, the sealing member, and the glass substrate. Is provided .

  According to the present invention, since the inclined portion that is inclined with respect to the thickness direction of the first substrate is provided on at least one side of the first substrate, the glass substrate is bent when the sealing member is thermally contracted. It is possible. By providing the inclined portion so that the glass substrate can be deformed, the concentrated load (stress) on the glass substrate can be relaxed and glass breakage can be prevented even when the sealing member is thermally contracted. Thereby, it is possible to maintain the sealing performance with respect to the electrophoretic element.

  Moreover, when the sealing width by the said sealing member differs, it is preferable that the said inclination part is provided in the side with the said large sealing width.

  According to the present invention, since the inclined portion is provided on the side where the sealing width by the sealing member is large, the glass substrate is provided on the end side of the electrophoretic element that is easily affected by the stress due to the thermal contraction of the sealing member. Such concentrated load can be reduced.

  In addition, the inclined portion is provided on a side where a terminal on the element substrate and a terminal of a connection substrate provided on a surface of the element substrate opposite to the electrophoretic element are connected by wire bonding. Preferably it is.

  According to the present invention, by providing an inclined portion on the side of the wire bonding connection side where the sealing width of the sealing member tends to be large, the glass substrate can be used even in a portion where the sealing width is wide due to thermal contraction of the sealing member. It is possible to alleviate the concentrated load.

  Moreover, it is preferable that the said inclination part consists of an inclined surface which faces the said glass substrate side.

  According to the present invention, since the inclined portion is formed of an inclined surface facing the glass substrate side, it can be easily formed at a predetermined inclination angle.

  Moreover, it is preferable that the said inclination part consists of a curved surface which protrudes in the said glass substrate side.

  According to the present invention, since the inclined portion is formed of a curved surface protruding toward the glass substrate side, the bending angle of the glass substrate can be moderated.

  Further, it is preferable that the inclined portion is inclined outward at an angle of 5 ° or more with respect to the thickness direction of the first substrate.

  According to the present invention, since the inclination angle of the inclined portion is 5 ° or more, the angle of the corner portion of the first substrate in contact with the glass substrate becomes an obtuse angle, and the stress applied to the glass substrate in contact with the corner portion is relieved. Can do.

  Moreover, it is preferable that the thickness of the side edge part of the said glass substrate corresponding to the said inclination part is thinner than another part.

  According to this invention, since the thickness of the side edge part of the glass substrate corresponding to an inclination part is thinner than another part, a glass substrate is easy to bend.

  Moreover, it is preferable that the side edge part of the said glass substrate is located in a surface direction inner side rather than the side edge part of the said sealing member.

  According to the present invention, since the side end portion of the glass substrate corresponding to the inclined portion of the first substrate is located on the inner side in the surface direction of the substrate than the side end portion of the sealing member, the sealing by the sealing member The overlapping region between the glass substrate and the connection substrate can be reduced without reducing the capability, and the range in which the stress acts on the glass substrate can be reduced.

  Moreover, it is preferable that the said inclination part is provided in the all sides of the said 1st board | substrate.

  According to the present invention, by providing the inclined portions on all sides of the first substrate, each side of the glass substrate can be bent, and the durability of the electrophoretic display device can be improved.

  Moreover, it is preferable that the space | gap is provided in the area | region enclosed by the said inclination part, the said sealing member, and the said glass substrate.

  According to the present invention, since the sealing member is not filled in the region surrounded by the inclined portion, the sealing member, and the glass substrate, the glass substrate is easily bent.

  Since the electronic device of the present invention includes the electrophoretic display device of the present invention described above, the electronic device is highly durable and highly reliable.

1 is a plan view showing an overall configuration of an electrophoretic display device according to a first embodiment. FIG. 3 is a cross-sectional view illustrating a configuration along an AA cross section of the electrophoretic display device according to the first embodiment. Sectional drawing which shows the modification of an electrophoretic display apparatus. Sectional drawing which shows schematic structure of the electrophoretic display device which concerns on 2nd Embodiment. FIG. 14 illustrates an example of an electronic device. FIG. 14 illustrates an example of an electronic device. FIG. 14 illustrates an example of an electronic device.

  Embodiments of the present invention will be described below with reference to the drawings. In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

[First Embodiment]
FIG. 1 is a plan view showing the overall configuration of the electrophoretic display device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a configuration along the AA cross section in the electrophoretic display device of the first embodiment.
As shown in FIGS. 1 and 2, the electrophoretic display device 100 includes an electrophoretic display panel 10, an electrophoretic element 11, a glass substrate 4, a connection substrate 5, and a sealing member 6. The electrophoretic display device 100 has a configuration in which an electrophoretic sheet 3 is attached to an element substrate 2 (second substrate). A glass substrate 4 is disposed on the transparent substrate 30 of the electrophoretic sheet 3, and a connection substrate 5 is disposed on the element substrate 2 on the side opposite to the electrophoretic sheet 3. A sealing member 6 is disposed between the element substrate 2 and the glass substrate 4 so as to surround the electrophoretic layer 31.

  In the electrophoretic display device 100, a region where the pixel electrodes 25 are arranged is a display region 7 in a plan view. In the display area 7, the formation area of each pixel electrode 25 in a plan view is a pixel area, and an image such as a still image or a moving image is displayed for each pixel area. The periphery of the display area 7 is a non-display area 8 where no image is displayed.

  The element substrate 2 includes a base material 20, a drive layer 21, drive circuit elements 22 and 23, and terminals 27. The base material 20 is a plate-like member having a thickness of about 30 μm to 100 μm, for example. As a constituent material of the base material 20, for example, an inorganic substrate such as a glass substrate, a quartz substrate, a silicon substrate, a gallium arsenide substrate, polyimide, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polymethyl methacrylate (PMMA), Examples thereof include a plastic substrate (resin substrate) composed of polycarbonate (PC), polyethersulfone (PES), aromatic polyester (liquid crystal polymer), and the like.

  The drive layer 21 is a layer provided in a region overlapping the electrophoretic sheet 3 in a plan view on the inner surface 20a of the substrate 20. A planar formation region of the drive layer 21 substantially coincides with the display region 7, and the drive circuit elements 22 and 23 are provided on the peripheral portion (non-display region 8) of the drive layer 21. These drive circuit elements 22 and 23 are electrically connected to data lines and scanning lines, and supply signals to the drive layer 21.

  The drive layer 21 includes an insulating layer 24, a plurality of pixel electrodes 25, and a plurality of switching elements 26. The pixel electrodes 25 are electrodes arranged in a matrix, for example, in plan view. The switching element 26 is an element provided for each pixel electrode 25. A data line, a scanning line, and the like (not shown) are connected to the switching element 26. The insulating layer 24 is formed on the base material 20 so as to cover these parts.

  The terminal 27 is provided in a region on the inner surface 20 a of the base material 20 that is separated from the electrophoretic sheet 3 in plan view. A plurality of terminals 27 are arranged along one side of the element substrate 2. A wiring group (not shown) is connected to the terminal 27. The wiring group is connected to, for example, the scanning line and the data line.

The electrophoretic sheet 3 (electrophoretic element) has a transparent substrate 30 (first substrate), an electrophoretic layer 31, and an adhesive layer 33.
The transparent substrate 30 is a light-transmitting sheet that holds the electrophoretic layer 31 and has a thickness of about 25 μm to 200 μm (in this embodiment, 125 μm). Examples of the constituent material of the transparent substrate 30 include materials having high light transmittance such as polyethylene terephthalate (PET), polyethersulfone (PES), and polycarbonate (PC). For example, a moisture-proof sheet (not shown) may be disposed on the outer surface 30a of the transparent substrate 30.

The transparent substrate 30 of this embodiment is intentionally provided with an inclined portion 30A that is inclined at a predetermined angle with respect to the side surface of the transparent substrate 30 on at least one side thereof. The inclined portion 30A is an inclined surface facing the glass substrate 4 provided on the outer surface 30a of the transparent substrate 30, and the inner edge portion P1 of the inner surface 30b of the transparent substrate 30 and the outer edge portion positioned on the inner side in the plane direction. For example, it is inclined at an angle of 5 ° or more with respect to the thickness direction of the transparent substrate 30 so as to connect Q1. The range of the inclination angle is preferably within the range of 5 ° to 45 °.
Specifically, the inclined portion 30 </ b> A is provided on the entire side along the side where the element substrate 2 and the connection substrate 5 are connected by wire bonding.

  The inclined portion 30A may be formed on the transparent substrate 30 in a single state before the electrophoretic sheet 3 is bonded to the element substrate 2, or the electrophoretic sheet 3 may be formed on the element substrate 2. You may form in the state bonded together. In any case, it is easy to process the glass substrate because it is an inclined surface.

  The common electrode (not shown) is formed over almost the entire inner surface 30b of the transparent substrate 30, and is made of a conductive material having high light transmittance such as ITO. This common electrode is in a state of being electrically connected to the element substrate 2 via the vertical conductive member 9.

The electrophoretic layer 31 has a plurality of microcapsules 32.
The microcapsule 32 is a substantially spherical capsule in which an electrophoretic dispersion is enclosed, and the diameter of each capsule is substantially the same (30 μm to 100 μm). Examples of the material constituting the capsule wall film of the microcapsule 32 include compounds such as a gum arabic / gelatin composite film, urethane resin, urea resin, and urea resin. The electrophoretic dispersion liquid enclosed in the microcapsule 32 includes a plurality of electrophoretic particles and a liquid phase dispersion medium for dispersing the electrophoretic particles.

  Examples of liquid dispersion media include water, alcohol solvents, various esters, ketones, aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, carboxylates, and other various oils. It is possible to use a mixture of a surfactant or the like alone or a mixture thereof.

  As the electrophoretic particles, organic or inorganic particles (polymer or colloid) having a property of moving by electrophoresis due to a potential difference in a liquid phase dispersion medium can be used. Specifically, black pigments such as carbon black and aniline black, white pigments such as titanium dioxide, monoazo azo pigments, yellow pigments such as isoindolinone, monoazo azo pigments, red pigments such as quinacridone red, phthalocyanine One or more of blue pigments such as blue and green pigments such as phthalocyanine green can be used. These pigments include electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, charge control agents composed of particles such as compounds, titanium-based coupling agents, aluminum-based coupling agents, silanes as necessary. A dispersant such as a system coupling agent, a lubricant, a stabilizer, and the like can be added.

  In the microcapsule 32, for example, two types of electrophoretic particles of titanium dioxide which is a white pigment and carbon black which is a black pigment are encapsulated, one of which is negatively charged and the other of which is positively charged. Of course, other electrophoretic particles may be used, or only one type of electrophoretic particle may be used, and the electrophoretic particles may be moved to the common electrode side or the pixel electrode side so that display can be performed.

  The adhesive layer 33 is an adhesive that also serves as a binder. As the adhesive layer 33, for example, it is preferable to use an adhesive having good affinity for the capsule wall film of the microcapsule 32 and excellent adhesion to the pixel electrode 25.

  The electrophoretic display panel 10 is configured by bonding the electrophoretic sheet 3 having the above configuration onto the inner surface 20a of the element substrate 2 via the adhesive layer 33.

  The glass substrate 4 is a substrate disposed on the outer surface 30 a of the transparent substrate 30 via an adhesive layer (not shown), and is larger in size in plan view than the transparent substrate 30 and the element substrate 2. . In the present embodiment, as the glass substrate 4, a glass substrate having high light transmittance, excellent flatness, and hardly scratches is used. Specifically, inorganic glass, crystal glass, sapphire glass, acrylic glass, or the like can be used. The glass substrate 4 is configured to cover the electrophoretic layer 31 together with the element substrate 2 and the transparent substrate 30, and the configuration prevents moisture from entering the electrophoretic layer 31 more reliably.

  The size of the connection substrate 5 in plan view matches the size of the glass substrate 4. The connection substrate 5 has a base material 50 and terminals 51 on the surface on the element substrate 2 side. The connection substrate 5 is a rectangular plate-like member disposed on the outer surface 20b of the base material 20 of the element substrate 2, and is provided at a position overlapping the glass substrate 4 in plan view. As shown in FIG. 1 and FIG. 2, the connection substrate 5 is formed in a size that is attached to the outer peripheral side of the electrophoretic display panel 10 and partially attached to the outer peripheral side of the glass substrate 4. The terminal 51 is provided in a region partially protruding outside the electrophoretic display panel 10, and is electrically connected to the terminal 27 on the electrophoretic display panel 10 side via a wire 111. The connection substrate 5 also has a function as a support substrate that supports the electrophoretic display panel 10.

  The sealing member 6 is a portion that seals the electrophoretic layer 31, and is disposed between the peripheral portions of the element substrate 2 and the glass substrate 4 of the electrophoretic display panel 10, and the circumferential direction of the electrophoretic layer 31 is determined. It is formed to surround. Examples of the material of the sealing member 6 include a resin material such as an epoxy resin.

  According to the configuration of the present embodiment, on at least one side of the transparent substrate 30 of the electrophoretic sheet 3, the inclined portion 30 </ b> A that is inclined outward at a predetermined angle with respect to the thickness direction (side surface) of the substrate is on the glass substrate 4 side. Therefore, when the sealing member 6 is thermally contracted, the glass substrate 4 can be bent according to the contraction of the resin. As described above, since the inclined portion 30 </ b> A is formed so as to face the glass substrate 4, the end portion of the glass substrate 4 that is in contact with the sealing member 6 is pulled inside by the contraction of the sealing member 6. It is the structure which can be changed into.

  By providing the inclined portion 30A in this manner and allowing the glass substrate 4 to be deformed, the difference in thermal expansion coefficient between the sealing member 6 made of an epoxy resin material and the glass substrate 4 made of the glass substrate is as follows: Local stress can be prevented from being generated on the glass substrate 4 at the boundary between the electrophoretic sheet 3 and the sealing member 6. In other words, the inclined portion 30 </ b> A makes it difficult for the corner portion of the transparent substrate 30 of the electrophoretic sheet 3 to be a fulcrum, so that a concentrated load is not generated on a part of the transparent substrate 30.

  Further, when the fulcrum when the glass substrate 4 is bent by the inclined portion 30A is separated from the sealing member 6, the range in which the stress acts on the glass substrate 4 is widened and the stress is dispersed. Since the fulcrum when the glass substrate 4 bends due to the inclined portion 30 </ b> A in the transparent substrate 30 moves according to the deformation amount of the substrate (shrinkage amount of the sealing member 6), the concentrated load generated on the glass substrate 4 is reduced. It can be mitigated.

  In the present embodiment, the inclined portion 30A is provided on at least one side of the transparent substrate 30 of the electrophoretic sheet 3, and specifically, provided on the entire side where the element substrate 2 and the connection substrate 5 are connected by wire bonding. It has been. The side of the glass substrate 4 on the wire bonding side has a larger sealing width by the sealing member 6 than the other sides, so there are many areas where the glass substrate 4 is in contact with the sealing member 6, and the heat shrinkage of the sealing member 6 Susceptible to. Therefore, the electrophoretic sheet 3, the sealing member 6, and the like are provided by providing the inclined portion 30 </ b> A on the side where the sealing width by the sealing member 6 is wide to make the end of the glass substrate 4 bend easily. Concentrated stress is unlikely to be applied to a predetermined portion of the glass substrate 4 corresponding to the boundary portion.

  As a result, even if the sealing member 6 contracts when the electrophoretic display device 100 is left in a low-temperature environment, the glass substrate 4 is caused by the concentrated stress at the boundary portion between the electrophoretic sheet 3 and the sealing member 6. It is possible to prevent a phenomenon such as cracking from occurring. Therefore, moisture resistance with respect to the electrophoretic sheet 3 is also ensured for a long period of time, and it has excellent durability, and the reliability as the electrophoretic display device 100 can be improved.

When the sealing width in plan view by the sealing member 6 is different for each side of the transparent substrate 30, the inclined portion 30A is provided at least on the side having the largest sealing width.
In the present embodiment, the inclined portion 30 </ b> A is provided on one side of the transparent substrate 30, but the inclined portion 30 </ b> A may be provided on all four sides of the transparent substrate 30. Thereby, since each side of the glass substrate 4 can be bent by the thermal contraction of the sealing member 6, the damage prevention effect of the glass substrate 4 can be further enhanced.

  In the present embodiment, since the inclination angle of the inclined portion 30A is set within a range of 5 ° or more and 45 ° or less, the angle of the corner portion of the transparent substrate 30 in contact with the glass substrate 4 may be an obtuse angle. It is possible to alleviate the concentrated stress applied to the glass substrate 4 in contact with the corners.

  Moreover, in this embodiment, it is preferable that the area | region enclosed by the transparent substrate 30, the sealing member 6, and the glass substrate 4 is a space | gap. Since the sealing member 6 is not filled between the glass substrate 4 and the transparent substrate 30, the glass substrate 4 is easily deformed. In addition, let this space | gap be a magnitude | size which does not reduce the sealing performance by the sealing member 6. FIG.

In the present embodiment, the inclined portion 30A made of an inclined surface has been described. However, as shown in FIG. 4, an inclined portion 30B made of a curved surface protruding outward may be used. By forming the inclined portion 30 </ b> A from a curved surface protruding toward the glass substrate 4, the bending angle of the glass substrate 4 can be moderated and local stress is prevented from being applied to the glass substrate 4 locally. .
Further, the size of the glass substrate 4 need not match the size of the connection substrate 5.

[Second Embodiment]
Next, an electrophoretic display device according to a second embodiment will be described. FIG. 4 is a cross-sectional view showing a schematic configuration of the electrophoretic display device of the present embodiment.

  Although the size of the counter substrate of the electrophoretic display device shown above in plan view coincides with that of the connection substrate 5, in the electrophoretic display device 200 according to the present embodiment, the size of the glass substrate 14 as shown in FIG. Is smaller than the connection substrate 5, and the side end portion of the glass substrate 14 corresponding to the inclined portion 30 </ b> A of the transparent substrate 30 is located on the inner side in the plane direction of the substrate from the side end portion of the sealing member 6. ing.

The glass substrate 14 is provided with an inclined portion 14 </ b> A that is inclined at a predetermined angle with respect to the side surface of the glass substrate 14 at least on the side corresponding to the inclined portion 30 </ b> A of the transparent substrate 30. The inclined portion 14A is an inclined surface facing the outer side opposite to the transparent substrate 30, and connects the inner edge portion P2 of the inner surface 14b of the glass substrate 14 and the outer edge portion Q2 positioned on the inner side in the plane direction. The glass substrate 14 is inclined at a predetermined inclination angle with respect to the thickness direction of the glass substrate 14. For example, it is preferably within a range of 5 ° to 45 ° with respect to the side surface of the glass substrate 4.
The thickness of the end portion side of the glass substrate 14 is thinner than the central portion by the inclined portion 14A. The deformability of the glass substrate 4 is enhanced by reducing the thickness of the end portion on the side.

  The sealing member 6 is disposed between the peripheral portions of the glass substrate 14 and the connection substrate 5, and the side surface 6 b is an inclined surface that follows the inclined portion 14 </ b> A of the glass substrate 14. That is, in the plan view, the outer edge portion Q2, the inner edge portion P2 of the glass substrate 14 and the end edge portion U of the connection substrate 5 do not coincide with each other, and the side surfaces of the inclined portion 14A and the sealing member 6 are viewed from the glass substrate 14 side. 6b can be confirmed.

  According to the configuration of the present embodiment, the glass substrate 14 is smaller than the connection substrate 5, and the thickness on the end side of the glass substrate 14 by the inclined portion 14 </ b> A provided on the side corresponding to the inclined portion 30 </ b> A of the transparent substrate 30. Therefore, the end of the glass substrate 14 is more easily deformed by the inclined portion 14A and the inclined portion 30A of the transparent substrate 30.

In the present embodiment, the size of the glass substrate 14 is smaller than that of the connection substrate 5, and the end portion thereof is located on the inner side in the plane direction than the end portion of the connection substrate 5. For this reason, the overlapping region between the glass substrate 14 and the connection substrate 5 is reduced, and as a result, the range in which stress acts on the glass substrate 14 is reduced.
If the sealing width is reduced, the concentrated stress is also reduced. However, if the sealing width is reduced, the sealing performance for the electrophoretic layer 31 may be lowered. According to the configuration of the present embodiment, the stress can be relaxed with respect to the glass substrate 14 while the sealing performance with respect to the electrophoretic layer 31 is ensured, thereby preventing the glass substrate 4 from cracking.

In addition, the inclination angles of the inclined portion 14A of the glass substrate 14 and the inclined portion 30A of the transparent substrate 30 may be set to substantially the same angle, or may be set to different angles. The sealing width set between the inclined portion 30 </ b> A of the transparent substrate 30 and the side surface 6 b of the sealing member 6 only needs to be a width that can sufficiently ensure moisture resistance with respect to the electrophoretic sheet 3.
The size of the glass substrate 14 is set to such a size that a sufficient sealing performance can be secured by the sealing member 6 disposed between the glass substrate 4 and the connection substrate 5.
Further, the sealing member 6 may be provided so as to cover even the side surfaces of the glass substrate 4 and the connection substrate 5.

  In addition, you may provide an inclination part in the glass substrate 4 of 1st Embodiment whose magnitude | size is equal to the connection board | substrate 5. FIG. With this configuration, the end portion can be more easily bent than the counter substrate without the inclined portion.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the examples. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

(Electronics)
Next, the case where the electro-optical device (electrophoretic display device 100, 200) of the above embodiment is applied to an electronic device will be described.
FIG. 5 is a front view of the wrist watch 1000. The wrist watch 1000 includes a watch case 1002 and a pair of bands 1003 connected to the watch case 1002.
On the front surface of the watch case 1002, a display unit 1005, the second hand 1021, the minute hand 1022, and the hour hand 1023, which are the electro-optical devices of the above-described embodiments, are provided. On the side surface of the watch case 1002, a crown 1010 and an operation button 1011 are provided as operation elements. The crown 1010 is connected to a winding stem (not shown) provided inside the case, and is integrally provided with the winding stem so that it can be pushed and pulled in multiple stages (for example, two stages) and can be rotated. . The display unit 1005 can display a background image, a character string such as date and time, or a second hand, a minute hand, and an hour hand.

  FIG. 6 is a perspective view illustrating a configuration of the electronic paper 1100. An electronic paper 1100 includes the electro-optical device of the above embodiment in a display area 1101. The electronic paper 1100 is flexible and includes a main body 1102 made of a rewritable sheet having the same texture and flexibility as conventional paper.

  FIG. 7 is a perspective view showing the configuration of the electronic notebook 1200. An electronic notebook 1200 is obtained by bundling a plurality of the electronic papers 1100 and sandwiching them between covers 1201. The cover 1201 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 wristwatch 1000, the electronic paper 1100, and the electronic notebook 1200 described above, since the electro-optical device according to the present invention is employed, an electronic device having a display unit with high durability, excellent reliability, and high display quality. It becomes equipment.

  In addition, said electronic device illustrates the electronic device which concerns on this invention, Comprising: The technical scope of this invention is not limited. For example, the electro-optical device according to the present invention can be suitably used for a display portion of an electronic device such as a mobile phone or a portable audio device.

100,200 electrophoretic display device, 2 element substrate, 3 electrophoretic sheet, 4 counter substrate, 5 connection substrate, 6 sealing member, 6b side surface, 7 display area, 8 non-display area, 9 vertical conduction material, P inner edge , Q outer edge portion, S outer edge portion, T inner edge portion, U end edge portion, 10 electrophoretic display panel, 14 glass substrate 14A inclined portion, 14b inner surface, 20 base material, 20a inner surface, 20b outer surface, 21 driving layer, 22 driving Circuit element, 24 insulating layer, 25 pixel electrode, 26 switching element, 27 terminal, 30 transparent substrate, 30A inclined part, 30B inclined part, 30a outer surface, 30b inner surface, 31 electrophoretic layer, 32 microcapsule, 33 adhesive layer, 50 Base material, 51 terminal, 1100 ... electronic paper (electronic device), 1200 ... electronic notebook (electronic device)

Claims (10)

In an electrophoretic display device in which an electrophoretic element is sandwiched between a first substrate and a second substrate formed larger than the first substrate in plan view,
A glass substrate provided on a surface of the first substrate opposite to the second substrate and formed larger than the first substrate in plan view;
A sealing member disposed between and in contact with the glass substrate and the second substrate, and sealing the electrophoretic element between the glass substrate and the second substrate,
An inclined portion that is inclined with respect to the thickness direction of the first substrate is provided on at least one side of the surface of the first substrate facing the glass substrate ,
An electrophoretic display device , wherein a gap is provided in a region surrounded by the inclined portion, the sealing member, and the glass substrate . In the case where the sealing width by the sealing member is different,
The electrophoretic display device according to claim 1, wherein the inclined portion is provided on a side having the large sealing width.   The inclined portion is provided on a side where a terminal on the element substrate and a terminal of a connection substrate provided on the surface of the element substrate opposite to the electrophoretic element are connected by wire bonding. The electrophoretic display device according to claim 1 or 2.   The electrophoretic display device according to claim 1, wherein the inclined portion includes an inclined surface facing the glass substrate side.   The electrophoretic display device according to claim 1, wherein the inclined portion is formed of a curved surface that protrudes toward the glass substrate.   6. The electrophoretic display device according to claim 1, wherein the inclined portion is inclined outward at an angle of 5 ° or more with respect to a thickness direction of the first substrate.   The electrophoretic display device according to claim 1, wherein a thickness of a side end portion of the glass substrate corresponding to the inclined portion is thinner than that of other portions.   The electrophoretic display device according to claim 7, wherein a side end portion of the glass substrate is located on an inner side in a plane direction than a side end portion of the sealing member.   The electrophoretic display device according to claim 1, wherein the inclined portion is provided on all sides of the first substrate. An electronic apparatus, comprising an electrophoretic display device according to any one of claims 1 to 9.

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