JP2011180360A - Electrophoretic display apparatus, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrooptical device, a method of driving the electrooptical device, and an electronic device. <P>SOLUTION: The electrophoretic display device has an electrophoretic layer held between a first substrate and a second substrate. A pixel electrode is provided in a display area on the first substrate, and a first electrode and a second electrode are provided in a peripheral area. A common electrode is provided in a display area on the second substrate, and a third electrode which faces the first electrode and the second electrode and is insulated from the common electrode is provided in the peripheral area. The electrophoretic layer is provided in the display area and the peripheral area, the first electrode and the second electrode are driven independent of each other, and the third electrode is an electrically isolated electrode. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

 Display devices typified by liquid crystal display devices are used in various fields such as office automation equipment, information terminals, watches, and televisions by making use of features such as thinness, light weight, and low power consumption. Currently, these mobile phones and other devices are required to be thinner, lighter and more durable.

 On the other hand, although it is inferior to a liquid crystal display device in terms of color display and moving image display, an electrophoretic display (EPD) has a property close to that of paper as a display body that can realize thinness, lightness and low power consumption. Development is progressing as "electronic paper" for the purpose of reading. A microcapsule type EPD, which is a typical electronic paper, encloses a solvent in which charged particles are dispersed in a microcapsule and applies a voltage to electrodes formed on the top and bottom of the microcapsule to generate an electric field, thereby generating a distribution of charged particles. It is a display body that obtains contrast by changing. Even when the voltage application is stopped, the charged particles attracted by the electrostatic force or intermolecular force remain in the vicinity of the electrode, so that the display image can be held without consuming power.

Furthermore, the microcapsule type EPD observes the color (reflected light) of the charged particles and the solvent itself, not the transmitted light such as a liquid crystal display or the light emission such as an organic EL display, so that there is no dependence on the viewing angle and the paper. As such, it has the advantage of being gentle on the eyes and able to withstand long-term staring.

  Taking advantage of these characteristics, it is expected to be applied to cards with a display function, and further to flexible display devices such as curved display and paper that can be bent repeatedly. Here, it is important to secure a wider effective area that can contribute to image display in order to realize an appearance that can image paper at the same time as thin paper.

 EPD and other flexible modules are curved displays as products that display in a bent state taking advantage of their high flexibility, and products that can withstand repeated bending using more flexibility, such as cards with display functions Development with a view to the above is underway. When an EPD module is built in such a card with a display function, not only a thinning for realizing a thickness (total thickness of 0.76 ± 0.08 μm or less) compliant with the card standard but also a limited display area ( A display that effectively uses (54.0 × 85.6 mm) is important. In addition, in the future replacement of paper products, it is very important to realize an appearance that can image paper, that is, an ultra-narrow frame.

Usually, EPD has a problem that the display characteristics change as the amount of water present in the electrophoretic material changes.
Therefore, in the conventional EPD module, for example, a moisture-proof structure shown in Patent Document 1 has been proposed for the purpose of ensuring the reliability of the surrounding environment. However, when this moisture-proof structure is applied to the EPD module, it is necessary to secure a moisture-proof area outside the electrophoretic sheet and the driving substrate, and it is extremely difficult to realize a narrow frame structure. For example, as a method of maintaining moisture resistance in the region up to the end of the driving substrate, it is possible to make the electrophoretic sheet smaller than the driving substrate and to match the end of the moisture-proof sheet with the end of the driving substrate. However, even in this case, the frame width extends from the outermost display pixel electrode to the end of the drive substrate (end of the moisture-proof sheet), and it is difficult to narrow the frame below this width.

 On the other hand, as a method of expanding the display area of the drive substrate by keeping the display quality of the entire screen uniform, Patent Document 2 is provided with dummy pixels shielded by a light shielding part on the outer periphery of the display part having matrix pixels. A liquid crystal display device in which a shift register is provided outside the dummy pixel is disclosed.

JP 2007-72128 A Japanese Patent Laid-Open No. 5-241153

However, even in the structure of Patent Document 2, dummy pixels provided around the display pixel electrode are not in contact with scanning lines and display lines, so that the dummy pixel region can contribute to image display. It is not a typical area.
From the above, there is a problem that the widening of the frame width significantly reduces the merchantability for realizing cards and electronic paper products such as paper that require effective use of a limited display area.

  The present invention has been made in view of the above-described problems of the prior art, and realizes a narrow frame width and an electrophoretic display capable of ensuring a wider effective area that can contribute to image display. One of the objects is to provide an apparatus and an electronic device.

  In order to solve the above problems, an electrophoretic display device of the present invention includes an electrophoretic layer sandwiched between a first substrate and a second substrate, and a pixel electrode provided in a display region on the first substrate. The first electrode and the second electrode provided in the peripheral region on the first substrate, the common electrode provided in the display region on the second substrate, and the common electrode provided in the peripheral region on the second substrate The electrophoretic layer is provided in the display region and the peripheral region, and the first electrode and the second electrode are driven independently of each other, The third electrode is characterized by being electrically isolated.

 In the present invention, the first and second electrodes are provided in the peripheral region on the first substrate, the third electrode is provided in the peripheral region on the second substrate, and the first electrode and the second electrode are independent of each other. The third electrode is an electrically isolated electrode. Therefore, when different potentials are input to the first electrode and the second electrode, potential separation occurs in the electrically isolated third electrode in accordance with the potentials input to these electrodes. Of the third electrode, the potential distribution differs between the region facing the first electrode and the region facing the second electrode, and the electrophoretic element layer on the peripheral region side is driven by the potential distribution. As a result, a display image can be displayed according to the potential input to each of the first electrode and the second electrode.

  The first electrode is disposed closer to the display area than the second electrode, and a first potential is input to the pixel electrode and the first electrode, and the second electrode and the common electrode are input to the first electrode. It is preferable that a second potential different from the first potential is input.

 According to the present invention, the first potential is input to the pixel electrode and the first electrode, and the second potential different from the first potential is input to the second electrode and the common electrode. An electric field in a direction opposite to the display region is generated between the electrically isolated third electrode and the second electrode. Then, in the region of the third electrode facing the first electrode, an electric field in the same direction as that of the display region is generated as a result of the charge having the opposite polarity to the region of the third electrode facing the second electrode being induced. Arise. As a result, in the region where the first electrode is formed, it is possible to perform display similar to that of the pixel arranged on the outermost side in the display region. Therefore, the apparent display area is widened and the frame can be narrowed.

  The first electrode, the second electrode, and the third electrode are preferably provided along each side of the first substrate or the second substrate.

 According to the present invention, since the first electrode and the second electrode are provided along each side of the first substrate, the display area can be expanded and the frame can be narrowed in the entire electrophoretic display device. .

  The second electrode is preferably made of a common electrode wiring.

 According to the present invention, since the second electrode also functions as a common electrode wiring, there is no need to separately form a common electrode wiring. Thereby, it is possible to obtain effects such as improvement in manufacturability and narrowing of the frame region by simplifying the structure.

  In addition, it is preferable that the second electrode is formed with a width that is half or less of the width of the first electrode.

 According to the present invention, since the second electrode is formed with a width less than half of the width of the first electrode, a frame width less than half of the conventional frame width is realized.

An electronic apparatus according to the present invention includes the electro-optical device according to the present invention.
According to the present invention, since a display body capable of ensuring a wider effective display area that can contribute to image display is provided, a highly reliable high-quality electronic device is obtained.

(A) The figure which shows the whole structure of the electrophoretic display apparatus which concerns on this embodiment, (b) The figure which shows the planar structure of an element substrate. The schematic diagram of a microcapsule. FIG. 6 is an operation explanatory diagram of the electrophoretic display device. The figure which shows the voltage application state of an electrophoretic display apparatus. The top view which shows the shape of the 1st electrode and 2nd electrode in the corner | angular part of an element substrate. 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. 1A is a cross-sectional view showing a schematic configuration of an electrophoretic display device 100 of the present invention.
The electrophoretic display device 100 includes an electrophoretic panel 2 in which an electrophoretic layer 32 in which a plurality of microcapsules 20 are arranged is sandwiched between an element substrate 30 and a counter substrate 31. In the display area 7 of the electrophoretic panel 2, a plurality of pixel electrodes 35 are arranged on the electrophoretic layer 32 side of the element substrate 30, and the electrophoretic layer 32 is connected to the pixel electrodes 35 via the adhesive layer 33. It is glued.

The element substrate 30 is made of a glass substrate or a quartz substrate, and has a driving layer 22, a scanning line driving circuit 61, a data line driving circuit 62, and the like on the surface thereof. As a constituent material of the element substrate 30, in addition to a glass substrate or a quartz substrate, for example, an inorganic substrate such as a silicon substrate or a gallium arsenide substrate, polyimide, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polymethyl methacrylate ( PMMA), polycarbonate (PC), polyethersulfone (PES), a plastic substrate (resin substrate) composed of aromatic polyester (liquid crystal polymer), and the like. The element substrate 30 is a plate-like member having a thickness of about 30 to 100 μm, for example.
The element substrate 30 is not necessarily transparent because it is disposed on the side opposite to the image display surface.

  The drive layer 22 is a layer provided in a region of the inner surface 30a of the element substrate 30 that overlaps the plurality of pixel electrodes 35 in plan view. The planar drive layer 22 formation region substantially coincides with the display region 7, and the scanning line drive circuit 61 and the data line drive circuit 62 are provided on the peripheral portion of the drive layer 22, that is, on the peripheral region 8 side. Yes. The scanning line driving circuit 61 and the data line driving circuit 62 are electrically connected to data lines and scanning lines, and supply signals to the driving layer 22 (each pixel). Here, the peripheral region 8 is a region between the display region 7 and the outer edge of the element substrate 30.

  The drive layer 22 formed in the display region 7 includes an insulating layer 24, a plurality of pixel electrodes 35, and a plurality of transistors (not shown) connected to the pixel electrodes 35. The pixel electrodes 35 are electrodes arranged in a matrix, for example, in plan view. The transistor is an element provided for each pixel electrode 35 and is connected to a data line, a scanning line, and the like extending from the scanning line driving circuit 61 and the data line driving circuit 62 formed in the peripheral region 8. An insulating layer 24 made of a silicon oxide film or a silicon nitride film is formed on the element substrate 30 so as to cover these parts.

A plurality of pixel electrodes 35 are provided on the display region 7 side on the insulating layer 24, and a first electrode 14 and a second electrode 15 are provided on the peripheral region 8 side in this order from the display region 7 side. The first electrode 14 is disposed closer to the display region 7 than the second electrode 15, and the second electrode 15 is located on the outermost side (periphery) on the substrate. The first electrode 14 and the second electrode 15 are connected to different wirings and can be driven independently.
The pixel electrode 35, the first electrode 14, and the second electrode 15 are electrodes formed by laminating nickel plating and gold plating on a Cu foil in this order, or electrodes formed of Al, ITO (indium tin oxide), or the like. is there.

As described above, the pixel electrode 35 is provided for each pixel formed at the intersection of the scanning line and the data line, and the area of each pixel electrode 35 is the same. The first electrode 14 is provided just outside the display region 7 and on the scanning line driving circuit 61 and the data line driving circuit 62, and has a predetermined width of the element substrate 30 and is formed along each side. ing. The second electrode 15 is provided on the scanning line driving circuit 61 and the data line driving circuit 62 just like the first electrode 14 just outside the first electrode 14, and is formed along each side of the element substrate 30. Has been.
In the present embodiment, the second electrode 15 is formed with a width W2 that is less than or equal to half the width W1 of the first electrode 14, as shown in FIG. The second electrode 15 also functions as a common electrode wiring for applying a voltage to the common electrode 37 of the electrophoresis sheet.

On the other hand, the counter substrate 31 is a substrate made of glass, plastic, or the like, and is a transparent substrate because it is disposed on the image display side. On the inner surface 31 a of the counter substrate 31, a common electrode 37 that faces the plurality of pixel electrodes 35 is formed on the display region 7 side, and the third electrode 16 that faces the first electrode 14 and the second electrode 15 on the peripheral region 8 side. Is formed. An electrophoretic layer 32 is provided on the common electrode 37 and the third electrode 16.
The common electrode 37 and the third electrode 16 are transparent electrodes formed of MgAg, ITO, IZO (indium / zinc oxide), or the like. The third electrode 16 is a floating electrode that is separated from the common electrode 37 and is electrically isolated.
The common electrode 37 and the third electrode 16 are formed by forming a layer made of the above metal material on the counter substrate 31 and then dividing the layer directly above the boundary between the pixel electrode 35 and the first electrode 14. Thus, as described above, each is electrically insulated and is in a floating state.

 The electrophoretic layer 32 is generally handled as an electrophoretic sheet by the counter substrate 31 and the plurality of microcapsules 20 fixed on the counter substrate 31. In the manufacturing process, the electrophoretic sheet is handled in a state where a protective release sheet is attached to the surface of the adhesive layer 33. And a display part and a non-display part are formed by sticking the electrophoretic sheet which peeled off the release sheet with respect to the element substrate 30 (The pixel electrode 35, various circuits, etc.) which were manufactured separately. .

 The electrophoretic layer 32 of the present embodiment is provided from the display area 7 to the peripheral area 8 and has a size that covers these areas 7 and 8 at a time. In the conventional configuration, the electrophoretic layer 32 is provided only in the display area 7, but in the present embodiment, the electrophoretic layer 32 is provided not only in the display area 7 but also in the peripheral area 8.

FIG. 2 is a schematic cross-sectional view of a microcapsule.
As shown in FIG. 2, the microcapsule 20 has a particle size of about 50 μm, for example, and has a dispersion medium 21, a plurality of white particles (electrophoretic particles) 27, and a plurality of black particles (electrophoresis). Particles) 26. The microcapsule 20 is sandwiched between the common electrode and the pixel electrode 35, and one or a plurality of microcapsules 20 are arranged in one pixel 40.

The outer shell (wall film) of the microcapsule 20 is formed using a transparent polymer resin such as acrylic resin such as polymethyl methacrylate and polyethyl methacrylate, urea resin, and gum arabic.
The dispersion medium 21 is a liquid that disperses the white particles 27 and the black particles 26 in the microcapsules 20. Examples of the dispersion medium 21 include water, alcohol solvents (methanol, ethanol, isopropanol, butanol, octanol, methyl cellosolve, etc.), esters (ethyl acetate, butyl acetate, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.). ), Aliphatic hydrocarbons (pentane, hexane, octane, etc.), alicyclic hydrocarbons (cyclohexane, methylcyclohexane, etc.), aromatic hydrocarbons (benzene, toluene, benzenes having a long-chain alkyl group ( Xylene, hexylbenzene, hebutylbenzene, octylbenzene, nonylbenzene, decylbenzene, undecylbenzene, dodecylbenzene, tridecylbenzene, tetradecylbenzene)), halogenated hydrocarbons (methylene chloride, chloroform, tetrachloride) Element, and 1,2-dichloroethane), can be exemplified a carboxylate, it may be other oils. These substances can be used alone or as a mixture, and a surfactant or the like may be further blended.

The white particles 27 are particles (polymer or colloid) made of a white pigment such as titanium dioxide, zinc white, and antimony trioxide, and are used, for example, by being negatively charged. The black particles 26 are particles (polymer or colloid) made of a black pigment such as aniline black or carbon black, and are used by being charged positively, for example.
These pigments include electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, compound charge control agents, 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.
Further, instead of the black particles 26 and the white particles 27, for example, pigments such as red, green, and blue may be used. According to such a configuration, red, green, blue, or the like can be displayed on the display area 7.

 In the electrophoresis panel 2 having such a configuration, a moisture-proof film 12 is provided on the outer surface side of the counter substrate 31 as shown in FIG. Since the counter substrate 31 is made of a substrate such as plastic, moisture resistance is likely to be lower than that of the element substrate 30 made of a glass substrate. Therefore, the moisture-proof film 12 is provided so as to cover the entire outer surface of the counter substrate 31. Yes.

The moisture-proof film 12 is a multilayer film-type moisture-proof film in which a plurality of films on which inorganic films are formed are laminated via an adhesive, and is, for example, a transparent and moisture-proof inorganic film such as silica or alumina. A film to which moisture-proof performance is added by forming an organic film such as polycarbonate or PET is used.
In addition, since the element substrate 30 is made of a glass substrate having high moisture resistance, a moisture-proof film is not necessarily required. However, when the element substrate 30 is made of a material other than glass, a moisture-proof film may be provided on the outer surface of the element substrate 30. Good.

  In the electrophoretic panel 2, a sealing material 6 is formed so as to surround the electrophoretic layer 32 and the counter substrate 31. The sealing material 6 is disposed on the peripheral portion of the element substrate 30 and is formed over the side end face 31 b of the counter substrate 31. By sealing the periphery of the electrophoretic layer 32 with the sealing material 6, moisture resistance to the electrophoretic layer 32 is ensured. Examples of the material of the sealing material 6 include a resin material such as an epoxy resin.

Next, the operation of the electrophoretic display device 100 configured as described above will be briefly described.
FIG. 3 is an operation explanatory diagram of the electrophoretic display device 100. FIG. 3A is a diagram showing a state where the entire display area 7 is displayed in black. FIG. 3B is a diagram illustrating an operation state when an image is displayed on the display area 7.

  First, in the initial state shown in FIG. 3A, in the display area 7, the black particles 26 are attracted to the common electrode 37 side, and the white particles 27 are attracted to the pixel electrode 35 side. Are black display states. Further, in the peripheral region 8, the black particles 26 are attracted to the third electrode 16 side, the white particles 27 are attracted to the first electrode 14 and the second electrode 15 side, and the peripheral region 8 side is also in a black display state. .

  Thus, when the display region 7 and the peripheral region 8 are displayed in black, the common electrode 37 is held at a relatively low potential and the pixel electrode 35 is held at a relatively high potential. As a result, the positively charged black particles 26 are attracted to the common electrode 37, while the negatively charged white particles 27 are attracted to the pixel electrode 35. As a result, when this pixel is viewed from the common electrode 37 side, black (B) is recognized.

  When the display area 7 in this state is displayed in white, a potential corresponding to image data is input to each pixel 40 in the display area 7. That is, image data is supplied from a controller (not shown) to the scanning line driving circuit and the data line driving circuit, and each pixel 40 is connected to the pixel electrode 35 via the scanning line and the data line from the scanning line driving circuit and the data line driving circuit. A potential corresponding to image data is input.

 Thus, when the display area 7 is displayed in white, the common electrode 37 is held at a relatively high potential and the pixel electrode 35 is held at a relatively low potential. Thereby, as shown in FIG. 3B, the negatively charged white particles 27 are attracted to the common electrode 37, while the positively charged black particles 26 are attracted to the pixel electrode 35. As a result, when this pixel is viewed from the common electrode 37 side which is the display surface side, white (W) is recognized.

On the other hand, in the peripheral region 8, since the third electrode 16 is an electrically isolated electrode, its potential Vcom is the floating potential Vf.
Then, a high level potential VH (for example, +20 V) is input as the first potential to the pixel electrode 35A and the first electrode 14 on the outermost side (peripheral region 8 side) in the display region 7, and the second electrode 15 A low level potential VL (for example, 0 V: GND) is input. When the pixel electrode 35A and the first electrode 14 have the same potential, and the common electrode 37 and the second electrode 15 have the same potential, the display region is between the electrically separated common electrode 37 and the second electrode 15. 7 is generated, a negative charge is induced in the region 16B of the third electrode 16 facing the second electrode 15 (FIG. 4), and the first electrode 14 of the third electrode 16 is opposed to the first electrode 14. In the region 16A, a positive charge having a polarity opposite to that of the region 16B is induced (FIG. 4). As a result, an electric field in the same direction as the display area 7 is generated.

The floating potential Vf of the third electrode 16 that is electrically isolated varies depending on the electrode distribution of the first electrode 14 and the second electrode 15 facing the third electrode 16. That is, the display similar to that of the pixel electrode 35 disposed on the outermost side is performed on the side of the third electrode 16 facing the first electrode 14, and the region 16B side of the third electrode 16 facing the second electrode 15. Then, it will remain black.
Therefore, here, the entire display region 7 and a part of the peripheral region 8 on the display region 7 side (region on the first electrode 14 side) are displayed in white, and the other region of the peripheral region 8 (on the second electrode 15 side). Area) is displayed in black and functions as a frame area.

  As shown in FIG. 4, the conventional frame width 110Wb is the length from the end of the outermost pixel electrode 35 to the ends of the element substrate 30 and the counter substrate 31 in the display area 7. The frame width 110Wa is narrowed to a length less than half of the conventional frame width 110Wb.

In the electrophoretic display device 100 of the present embodiment, a plurality of pixel electrodes 35 are provided in the display region 7 on the element substrate 30, while the first electrode 14 and the second electrode are provided in the peripheral region 8 on the element substrate 30. An electrode 15 is provided. The display area 7 of the counter substrate 31 is provided with a common electrode 37, while the peripheral area 8 of the counter substrate 31 is provided with a third electrode 16 facing the first electrode 14 and the second electrode 15. Yes.
Therefore, when different potentials are input to the first electrode 14 and the second electrode 15, the potential in the electrically isolated third electrode 16 is changed according to the potential input to the electrodes 14 and 15. Separation occurs. The potential distribution is different between the region 16A of the third electrode 16 facing the first electrode 14 and the region 16B facing the second electrode 15, so that the electrophoretic layer 32 on the peripheral region side is driven by the potential distribution. It has become. As a result, a display image can be displayed according to the potential input to each of the first electrode 14 and the second electrode 15.

Specifically, in the present embodiment, the first electrode 14 is disposed outside the display region 7 and inside the second electrode 15, and the first potential is input to the pixel electrode 35 and the first electrode 14. A second potential different from the first potential is input to the second electrode 15 and the common electrode 37 so as to be the same potential.
As a result, an electric field in the direction opposite to the display region 7 is generated between the electrically isolated third electrode 16 and the second electrode 15. Then, in the region of the third electrode 16 facing the first electrode 14, as a result of the charge having the opposite polarity to the region 16 A of the third electrode 16 facing the second electrode 15 being induced, the display region 7. An electric field in the same direction is generated. As a result, in the region where the first electrode 14 is formed, it is possible to perform the same display as the pixels arranged on the outermost side in the display region 7. Therefore, the apparent display area is widened and the frame can be narrowed.

  In the present embodiment, since the first electrode 14, the second electrode 15, and the third electrode 16 are provided on each side of the element substrate 30 or the counter substrate 31, the display area of the electrophoretic display device 100 as a whole is provided. The display body is enlarged and has good visibility.

  In the present embodiment, the second electrode 15 is composed of a common electrode wiring. Since the second electrode 15 also functions as a common electrode wiring, there is no need to separately form a common electrode wiring. Thereby, it is possible to obtain effects such as improvement of manufacturability and narrowing of a narrow frame region by simplifying the structure.

  In the present embodiment, since the width W2 of the second electrode 15 is less than half the width W1 of the first electrode 14, a frame width less than half the conventional narrow frame width is realized. Is done. Thereby, there is an effect that the merchantability as the electrophoretic display device 100 is remarkably improved.

FIG. 5 shows the planar shapes of the first electrode and the second electrode at the corners of the element substrate.
As shown in FIG. 5A, the ratio of the area occupied by the first electrode 14 and the second electrode 15 in the corner portion of the element substrate 30 is 1: 3. As shown, the areas may be equal to each other at a ratio of 1: 1. When the ratio of the area occupied by the first electrode 14 and the second electrode 15 is 1: 3, when the display region 7 is displayed in white, the area of the first electrode 14 is smaller than the area of the second electrode 15. Gray display is affected by the surrounding black display. On the other hand, when the ratio of the area occupied by the first electrode 14 and the second electrode 15 is 1: 1, the white display on the first electrode 14 side is not affected by the black display on the second electrode 15 side. Display is possible. As a result, high-contrast display is possible.

  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.

  For example, in the previous embodiment, the first electrode 14, the second electrode 15, and the third electrode 16 are provided along the periphery of the element substrate 30, but the scanning line driving circuit 61 and the data line driving circuit 62 are formed. It may be formed only on the formed region. Or you may make it provide in each edge | side of a board | substrate instead of a frame shape.

(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. 6 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. 7 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. 8 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, the electro-optical device capable of ensuring a wider effective display area that can contribute to image display according to the present invention is employed. It becomes a high-quality electronic device with high reliability.

  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 electrophoretic display device (electro-optical device), 2 electrophoretic panel, 6 sealing material, 7 display region, 8 peripheral region, 12 moisture-proof film, 14 first electrode, 15 second electrode, 16 third electrode, 16A region , 16B region, 30 element substrate, 31 counter substrate, 32 electrophoretic layer, 35 pixel electrode, 37 common electrode, 40 pixel, 61 scanning line drive circuit, 62 data line drive circuit, Vf floating potential, W1 width, W2 width, 110b Frame width, 1000 Watch (electronic device), 1100 Electronic paper (electronic device), 1200 Electronic notebook (electronic device)

Claims (6)

An electrophoretic layer sandwiched between a first substrate and a second substrate;
A pixel electrode provided in a display area on the first substrate;
A first electrode and a second electrode provided in a peripheral region on the first substrate;
A common electrode provided in a display area on the second substrate;
A third electrode insulated from the common electrode provided in a peripheral region on the second substrate,
The electrophoretic layer is provided in the display area and the peripheral area,
The electrophoretic display device, wherein the first electrode and the second electrode are driven independently from each other, and the third electrode is electrically isolated. The first electrode is disposed closer to the display area than the second electrode,
A first potential is input to the pixel electrode and the first electrode,
The electrophoretic display device according to claim 1, wherein a second potential different from the first potential is input to the second electrode and the common electrode.   The electrophoretic display device according to claim 1, wherein the first electrode, the second electrode, and the third electrode are provided along each side of the first substrate or the second substrate. .   The electrophoretic display device according to claim 1, wherein the second electrode includes a common electrode wiring.   3. The electrophoretic display device according to claim 1, wherein the second electrode is formed to have a width equal to or less than half of the width of the first electrode.   An electronic apparatus comprising the electrophoretic display device according to claim 1.

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