JP2009192628A - Method for manufacturing electrophoresis sheet and method for manufacturing of electrophoresis display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing inexpensively an electrophoresis sheet by which an electrophoresis sheet with high quality can be manufactured, and a method for manufacturing of an electrophoresis display device. <P>SOLUTION: In the method for manufacturing the electrophoresis sheet having an electrophoresis layer disposed on a transparent substrate, a plurality of cut portions of a cut member which extend in different directions such that extension directions of the cut portions are not opposite from each other are brought into contact with a top side of a mother transparent substrate where the electrophoresis layer is disposed, the cut member is pressed against the mother transparent substrate almost at the same time, and a partial area of the mother transparent substrate is cut. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrophoretic sheet manufacturing method and an electrophoretic display device manufacturing method.

  There is known an electrophoretic display device in which an electrophoretic sheet is attached to a display region of an element or an element substrate. In addition to the elements and circuits, the element substrate is provided with terminals for connecting these elements and circuits to an external electric circuit. (For example, refer to Patent Document 1).

  The electrophoretic sheet has a configuration in which an electrophoretic layer and an adhesive layer are formed on a transparent sheet on which a transparent electrode such as ITO is deposited. This electrophoretic layer is an electro-optical material layer whose optical characteristics change in response to electrical stimulation. Examples of the electro-optical material layer include a configuration in which microcapsules in which electrophoretic particles and a liquid-layer dispersion medium that disperses the electrophoretic particles are enclosed are spread over the entire surface of the sheet.

  Since such electrophoretic sheets are generally distributed in a large transparent sheet (mother transparent sheet) state, individual electrophoretic sheets are obtained by cutting the mother transparent sheet into desired dimensions. It was.

  In addition, for example, a CO2 laser can be used for the cutting process, but the laser irradiation apparatus is expensive, or heat is instantaneously generated when the laser is irradiated. The electrophoretic sheet made of an organic material may be rolled up or the microcapsules may be broken, so that it has not been used so much.

Therefore, for cutting the mother transparent sheet, a cutting die such as a Thomson type or a Pinnacle type, which has a low apparatus cost and generates little heat, has been used.
JP 2005-114822 A

  However, in the cutting process using the punching die, when the punching die is pressed against the mother transparent sheet, stress is applied to the central portion of the mother transparent sheet, and the microcapsules disposed in the portion to which the stress is applied are damaged. There was a problem. This is because, since the planar shape of the punching die is, for example, a rectangular closed shape, the sheet to be cut out at the time of cutting is pressed and pressed planarly from four directions in the closed space, so that the stress escape field This is presumed to be due to stress concentration at the center of the sheet.

  Moreover, since the electrophoretic sheet in a state where the microcapsules are broken becomes a defective product, the yield is reduced.

  In view of the above circumstances, an object of the present invention is to provide an electrophoretic sheet manufacturing method and an electrophoretic display device manufacturing method capable of manufacturing a high-quality electrophoretic sheet.

  In order to achieve the above object, an electrophoretic sheet manufacturing method according to the present invention is an electrophoretic sheet manufacturing method in which an electrophoretic layer is disposed on a transparent substrate, and a plurality of cutting portions extending in different directions. The cutting member provided so that the extending directions of the cutting members do not face each other is disposed on the mother transparent substrate on which the electrophoretic layer is disposed, and the cutting member is pressed against the mother transparent substrate almost simultaneously, A partial region of the mother transparent substrate is cut.

  According to the present invention, since the cutting parts of the cutting member provided so that the extending directions of the plurality of cutting parts extending in different directions do not face each other are arranged and pressed on the mother transparent substrate, the cutting member Therefore, the stress applied to the mother transparent substrate escapes in the direction perpendicular to the extending direction of each cut portion. For this reason, it is possible to avoid a state in which the pressure at the time of pressing the cutting member is concentrated on the central portion of the portion to be cut of the mother transparent substrate, and to avoid damage to the electrophoretic layer disposed on the portion. be able to. Thereby, a high-quality electrophoresis sheet can be manufactured. Moreover, since it cuts mechanically with a cutting member without using a laser etc., cost reduction can be achieved.

  In the method for manufacturing an electrophoretic sheet, the mother transparent substrate is rectangular in a plan view, the cutting member has two cutting portions, and the extending directions of the two cutting portions are orthogonal to each other. And the two cutting parts are in contact with each other, and the cutting member is arranged in a plane of the mother transparent substrate so that the extending directions of the two cutting parts are parallel to two orthogonal sides of the mother transparent substrate, respectively. It arrange | positions at a viewing angle part, after arrange | positioning the said cutting member, the said cutting member is pressed to the said mother transparent substrate substantially simultaneously, The 1st area | region of a planar viewing angle part is cut | disconnected among the said mother transparent substrate, It is characterized by the above-mentioned.

  According to the present invention, the mother transparent substrate is rectangular in plan view, the cutting member has two cutting portions, the extending directions of the two cutting portions are orthogonal, and the two cutting portions are In the case of contact, after the cutting member is arranged at the planar viewing angle portion of the mother transparent substrate so that the extending directions of the two cutting portions are parallel to two orthogonal sides of the mother transparent substrate, respectively, Since the cutting member is pressed against the mother transparent substrate almost simultaneously and the first region of the planar viewing angle portion of the mother transparent substrate is cut, the number of cutting points can be reduced as compared with the conventional case. For this reason, the influence of the stress applied to the mother transparent substrate can be reduced. Further, by using the corners without waste, it is possible to avoid cutting margins remaining at the ends of the mother transparent substrate, and the cost can be reduced.

  In the manufacturing method of the electrophoretic sheet, the mother transparent substrate is cut by the dimension in the one direction of the first region along one of two orthogonal sides of the mother transparent substrate after cutting the first region. And the cutting member are moved relative to each other, and after the relative movement, the cutting member is pressed against the mother transparent substrate almost simultaneously to cut the second region in contact with the first region of the mother transparent substrate. It is characterized by that.

  According to the present invention, after cutting the first region, the mother transparent substrate and the cutting member are relatively moved by the dimension in the one direction of the first region along one of two orthogonal sides of the mother transparent substrate. After the relative movement, the cutting member is pressed almost simultaneously with the mother transparent substrate to cut the second region in contact with the first region of the mother transparent substrate. One side of the side cut edge can be used as the end side of the second region, and the second region can be cut substantially in the same manner as when the corner is cut. Thereby, since an electrophoretic sheet can be manufactured only by repeating the same operation, the manufacturing efficiency can be improved. Further, as described above, since it is not necessary to form a cutting margin, the mother transparent substrate can be used without waste, and the cost can be reduced.

The method for manufacturing an electrophoretic sheet is characterized in that a plurality of cutting portions are integrally formed.
According to the present invention, since the plurality of cutting portions are formed integrally, it is possible to reduce labor when maintaining the cutting portions, for example, compared to the case where the cutting portions are provided individually. There is an advantage that you can.

An electrophoretic display device manufacturing method according to the present invention is an electrophoretic display device manufacturing method in which an electrophoretic sheet is bonded to an element substrate, and the electrophoretic sheet manufactured by the electrophoretic sheet manufacturing method described above. Is bonded to the element substrate.
According to the present invention, since the electrophoretic sheet manufactured with high quality at low cost is bonded to the element substrate, an electrophoretic display device with high display reliability can be manufactured at low cost.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing a schematic configuration of an electrophoretic display device 1 according to the present embodiment. FIG. 2 is a diagram showing a configuration along the section AA in FIG.

  As shown in FIGS. 1 and 2, the electrophoretic display device 1 includes an element substrate 2, an electrophoretic sheet 3, a cover glass 4, and a connection substrate 8, and the surface (first surface) of the element substrate 2. The electrophoresis sheet 3 is affixed, a cover glass 4 is disposed on the surface of the electrophoresis sheet, and a connection substrate 8 is disposed on the back surface (second surface) of the element substrate 2.

  The electrophoretic display device 1 is provided with a display area 5 for displaying images such as still images and moving images. A plurality of pixels arranged in a matrix are provided in the display area 5, and display is performed for each pixel. A region 6 around the display region 5 is a non-display region 6 where no image is displayed. The non-display area 6 is not provided with pixels, and is provided with drive circuit elements 22 and 23, a terminal 24, and the like.

  The element substrate 2 includes a substrate 20 and a drive layer 21 including a pixel electrode and the like formed on the substrate. Examples of the substrate 20 include inorganic substrates such as a glass substrate, a quartz substrate, a silicon substrate, and a gallium arsenide substrate, polyimide, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polymethyl methacrylate (PMMA), and polycarbonate (PC). A plastic substrate (resin substrate) composed of polyethersulfone (PES), aromatic polyester (liquid crystal polymer), or the like can be used. A drive layer 21 is formed in an area corresponding to the display area 5 in the substrate 20. In the drive layer 21, pixel electrodes and switching elements provided in each pixel, data lines and scanning lines connected to the switching elements, and the like are formed. A planar formation region of the drive layer 21 substantially coincides with the display region 5, and the drive circuit elements 22 and 23 are provided in the peripheral portion (non-display region 6) of the drive layer 21. The drive circuit elements 22 and 23 are electrically connected to data lines and scanning lines, and supply signals to the drive layer 21. A plurality of terminals 24 are provided at the end of the element substrate 2 (right end in the drawing), and are connected to the drive circuit elements 22 and 23 by wiring (not shown) formed on the element substrate 2.

  The connection substrate 8 is attached to the back surface 20b of the substrate 20. The connection substrate 8 includes a core member 8a made of, for example, glass epoxy, and a connection electrode 8b provided on the core member 8a. The core member 8 a is a rectangular plate-like member attached to the back surface 20 b of the substrate 20 so that one side extends from the substrate 20. The connection electrode 8b is made of metal such as copper or gold, for example, and a plurality of connection electrodes 8b are provided along the protruding one side of the core member 8a. The core member 8a is affixed so as to cover the entire back surface 20b of the substrate 20. The connection electrode 8b is connected to a terminal 24 provided on the surface 20a of the substrate 20 via a wire 10 made of metal such as gold or aluminum.

The electrophoretic sheet 3 has a transparent substrate 30 and an electrophoretic layer 31.
The transparent substrate 30 is a substrate that holds the electrophoretic layer 31, and is a rectangular substrate made of a material having high light transmittance, such as polyethylene terephthalate (PET), polyethersulfone (PES), polycarbonate (PC), and the like. The surface 30 a side of the transparent substrate 30 is the display surface side of the electrophoretic display device 1. A common electrode (not shown) is formed on almost the entire inner surface 30b of the transparent substrate 30. The common electrode is made of a conductive material having high optical transparency such as ITO, and is connected to the element substrate 2 by the vertical conduction member 9.

The electrophoretic layer 31 has a plurality of microcapsules (electrophoretic substance layers) 32 and an adhesive layer 33.
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 (50 μm to 100 μm). Examples of the material for forming 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 layer dispersion medium for dispersing the electrophoretic particles.

  Examples of the liquid layer dispersion medium include water, alcohol solvents, various esters, ketones, aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, carboxylates, and other various oils. These can be used alone, or a mixture of these with a surfactant or the like.

  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, an adhesive having good affinity for the capsule wall film of the microcapsule 32, excellent adhesion to the common electrode and the pixel electrode, and elasticity after curing is preferable.

  As the cover glass 4, glass having high light transmittance, excellent flatness, and hardly scratched is suitable. Specifically, inorganic glass, crystal glass, or the like can be used. Further, sapphire glass or acrylic glass may be used. The cover glass 4 and the electrophoretic sheet 3 are fixed by a transparent adhesive layer 11 such as a double-sided tape. A sealing material 7 is provided between the cover glass 4 and the element substrate 2. Examples of the material constituting the sealing material 7 include epoxy-based, acrylic-based, and silicon-based resins. In this embodiment, the sealing material 7 is formed of an epoxy resin. The sealing material 7 is provided so as to cover the core member 8 a and the connection electrode 8 b of the connection substrate 8 and to cover the entire wire 10, and the portion constituting the connection between the element substrate 2 and the connection substrate 8 is the sealing material. 7 is covered.

  The electrophoretic layer 31 is sandwiched between the element substrate 2 and the transparent substrate 30 and covered with the cover glass 4 and the connection substrate 8. Furthermore, since the peripheral edge portion of the electrophoretic layer 31 is sealed with the sealing material 7, it is configured to reliably prevent moisture from entering the layer.

  Thereby, it becomes possible to prevent the malfunction of the electrophoretic layer 31 due to the ingress of moisture, and it is possible to prevent the display quality from deteriorating.

Next, the operation of the electrophoretic display device 1 configured as described above will be briefly described.
When a voltage is applied between the pixel electrode and the common electrode so that the voltage of the common electrode becomes relatively high, the positively charged black electrophoretic particles are moved to the pixel electrode side in the microcapsule 32 by the Coulomb force. Be drawn to. On the other hand, negatively charged white electrophoretic particles are attracted to the common electrode side in the microcapsule 32 by Coulomb force. As a result, white electrophoretic particles gather on the transparent substrate 30 side in the microcapsule 32, and the color (white) of the white electrophoretic particles is displayed in the display area 5 of the electrophoretic display device 1. The Rukoto.

  Conversely, when a voltage is applied such that the potential of the pixel electrode is relatively higher than the common electrode, the negatively charged white electrophoretic particles are attracted to the pixel electrode side by the Coulomb force. On the other hand, the positively charged black electrophoretic particles are attracted to the common electrode side by the Coulomb force. As a result, black electrophoretic particles gather on the transparent substrate 30 side in the microcapsule 32, and the color (black) of the black electrophoretic particles is displayed in the display area 5 of the electrophoretic display device 1. It will be.

  Next, a method for manufacturing the electrophoretic display device 1 configured as described above will be described. In this embodiment, an assembly of a plurality of electrophoretic display panels is formed, the assembly is disposed on a dicing tape, and the assembly is cut by a dicing blade or the like, so that the plurality of electrophoretic display devices 1 are separated. An explanation will be given by taking a so-called multi-chamfering method as an example.

  First, as shown in FIG. 3, a plurality of panel regions P are formed on the surface 40 a of the mother substrate 40. Of each panel region P, pixel electrodes, switching elements, and the like are formed in the display region 5, and the driving circuit elements, terminals 24, wirings, and the like are formed in the non-display region 6. Each one of the panel regions P becomes one electrophoretic display device 1.

  After forming the panel area P, the electrophoretic sheet 3 is pasted on the display area 5 of each panel area P as shown in FIG. After the electrophoresis sheet 3 is attached, the mother connection substrate 41 is attached to the back surface 40b of the mother substrate 40 via an adhesive tape or the like as shown in FIG. The terminals 8b of the mother connection board 41 are aligned and pasted so that they are exposed to the upper and lower outsides of the mother board 40 in the figure.

  After the mother connection substrate 41 is attached, the terminals 24 on the mother substrate 40 and the connection electrodes 8b on the mother connection substrate 41 are connected by wires 10 as shown in FIG.

  After the connection by the wire 10, as shown in FIG. 7, the mother protective substrate 44 is pressed and bonded to the adhesive layer 11 from above the electrophoretic sheet 3. For example, a total of two mother protection substrates 44 are bonded together, one for the upper row of the panel area in the drawing and one for the lower row of the panel area in the drawing. Examples of pressing of the mother protective substrate 44 include pressurization using a roll and pressurization using a vacuum laminator. The mother protective substrate 44 is disposed so as to cover the electrophoretic sheet 3 and the portion bonded by wire bonding.

  After the mother protective substrate 44 is bonded, a sealing material 42 is sealed between the mother protective substrate 44 and the mother substrate 40 as shown in FIG. Examples of the material constituting the sealing material 42 include an epoxy resin. The epoxy resin is dissolved, and the dissolved epoxy resin spreads between the mother protective substrate 44 and the mother substrate 40 by a capillary force, thereby encapsulating the sealing material 42. The sealing material 42 is formed on almost the entire surface of the panel region P, such as between the electrophoretic sheets 3 or a portion connected by wire bonding.

  After forming the sealing material 42, the dissolved sealing material 42 is dried and solidified. By solidifying the sealing material 42, the mother protective substrate 44 that is in contact with the sealing material 42 and the mother protective substrate 44 are fixed in a bonded state. After the sealing material 42 is cured, the mother connection substrate 41, the mother substrate 40, the sealing material 42, and the mother protection substrate 44 are cut by a cutting member such as a dicing blade (not shown). After these cuttings, individual electrophoretic display devices 1 are obtained.

Next, a method for manufacturing the electrophoretic sheet 3 used in the electrophoretic display device 1 will be described.
The electrophoretic sheet 3 to be attached to the display area 5 in the process shown in FIG. 4 is obtained by cutting a mother sheet having an electrophoretic layer formed on almost the entire surface of a large transparent substrate. Hereinafter, a manufacturing method of cutting out individual electrophoretic sheets 3 from a rectangular mother sheet will be described.

  First, the configuration of a cutting device for cutting out the electrophoretic sheet 3 will be described. FIG. 10 is a perspective view showing the configuration of the cutting device 50. As shown in the figure, the cutting device 50 includes a stage 51, a guide 52, and a cutting member 53. In the figure, for the sake of convenience, description will be made using the XYZ coordinate system. Hereinafter, it is assumed that the X-axis direction is the short direction of the stage 51, the Y-axis direction is the longitudinal direction of the stage 51, and the Z-axis direction is a direction perpendicular to the X-axis and the Y-axis.

  The stage 51 is a table on which the mother sheet is placed when the mother sheet is cut. The guide 52 is provided on the stage 51 and is a guide for determining the position when the mother sheet is placed.

  The guide 52 is formed in an L shape in plan view, and is provided with a contact portion 52a extending in parallel with the X direction and a contact portion 52b extending in parallel with the Y direction. The extending direction of the contact portion 52a and the extending direction of the contact portion 52b are formed so as to be orthogonal to each other so as to contact the rectangular mother sheet without a gap. A concave portion 52d is provided in a corner portion 52c inside the L shape of the guide 52. The recess 52d is a space for ensuring escape of a corner portion of the mother sheet when the mother sheet is disposed. A recess 52e is provided on the inner side of the L of the contact portion 52b of the guide 52. The recess 52e is a space for ensuring escape of the cutting member 53.

  The cutting member 53 is a Thomson or Pinnacle blade, and is provided in an L shape in plan view. The cutting member 53 is provided with a cutting portion 53a extending in the X direction and a cutting portion 53b extending in the Y direction at the tip in the −Z direction in the drawing. The cutting part 53a and the cutting part 53b correspond to the cutting edge of the Thomson type or Pinnacle type blade, and are formed so as to be continuous at the corner part 53c. The cutting member 53 is disposed so that the L-shaped right-angled portion faces the contact portion 52a and the contact portion 52b of the guide 52.

  The cutting member 53 is provided with a moving mechanism and a pressing mechanism (not shown). The moving mechanism moves the cutting member 53 in the X direction and the Y direction. The pressing mechanism presses the cutting member 53 in the direction of the stage 51 (−Z direction). By these moving mechanism and pressing mechanism, the cutting member 53 can be moved in the X direction, the Y direction, and the Z direction, respectively.

  A contact position 55 on the stage 51 when the cutting member 53 is pressed by the stage 51 is indicated by a one-dot chain line in the drawing. When the cutting member 53 comes into contact with the stage 51, a part of the cutting part 53a is accommodated in contact with the concave part 52e, and the tip end portion in the Y direction of the cutting part 53b is at the −X direction end of the contact part 52a. It comes to touch. A region surrounded by the guide 52 and the contact position 55 in plan view is a maximum region cut by the cutting member 53.

Next, with reference to FIG. 11 to FIG. 14, a method for cutting the mother sheet using the cutting device 50 configured as described above will be described.
As shown in FIG. 11, first, the mother sheet 60 is placed on the stage 51 of the cutting device 50. The mother sheet 60 is a sheet in which microcapsules and an adhesive layer are formed in a transparent sheet shape, and has the same layer configuration as the electrophoretic sheet 3 used in the electrophoretic display device 1.

  When the mother sheet 60 is placed on the stage 51, the corners of the mother sheet 60 are aligned with the corners 52c of the guide 52, and the two sides of the mother sheet 60 are in contact with the contact part 52a and the contact part 52b. By doing so, the mother sheet 60 is aligned. Further, the cutting member 53 is aligned so that the cutting portion 53a of the cutting member 53 overlaps the accommodating portion 52e in plan view and the position of the cutting portion 53b overlaps the end portion of the contact portion 52a in the -X direction. The position of the cutting member 53 in the X direction and the Y direction is fixed at the position. In a state in which the position of the cutting member 53 in the X direction and the Y direction is fixed, a rectangular area (first area) on the mother sheet 60 surrounded by the abutment part 55 of the cutting part 53 a and the cutting part 53 b and the guide 52. ) 61 is an area to be cut.

  Thereafter, as shown in FIG. 12, the cutting member 53 is moved in the −Z direction in the drawing and pressed against the mother sheet 60. The first region 61 of the mother sheet 60 is cut by the cutting portion 53a and the cutting portion 53b of the cutting member 53. Since the extending direction of the cutting part 53a and the extending direction of the cutting part 53b are orthogonal to each other, the stress at the time of cutting the mother sheet 60 by the cutting part 53a escapes to the contact part 52a side of the guide 52. Thus, the stress at the time of cutting to the mother sheet 60 by the cutting part 53 b escapes to the contact part 52 b side of the guide 52. For this reason, it is possible to avoid a state in which stress is concentrated on the microcapsules arranged in the central portion of the first region 61 of the mother sheet 60.

  After cutting the first region 61 of the mother sheet 60, the cutting member 53 is pulled up in the + Z direction and the cut first region 61 is moved from the stage 51. The cut first region 61 becomes a component of the electrophoresis apparatus 1 as the electrophoresis sheet 3.

  After moving the first region 61, the mother substrate 60 is moved in the + Y direction as shown in FIG. Specifically, the mother sheet 60 is moved until a section 61 a parallel to the X direction of two sections formed by cutting the first region 61 contacts the contact portion 52 a of the guide 52. The amount of movement in the Y direction at this time is the amount of movement equivalent to the dimension of the first region 61 in the Y direction.

  Since the cutting member 53 has not moved in the X direction and the Y direction after the cutting of the first region 61, the cutting portion 53a overlaps the accommodating portion 52e in plan view, and the cutting portion 53b is -X of the contact portion 52a. It overlaps with the direction end in plan view. In this state, a rectangular area (second area) 62 on the mother sheet 60 surrounded by the guides 52 and the contact parts 55 of the cutting parts 53a and 53b is an area to be cut.

  Thereafter, as shown in FIG. 14, the cutting member 53 is moved in the −Z direction in the drawing and pressed against the mother sheet 60. The second region 62 of the mother sheet 60 is cut by the cutting portion 53a and the cutting portion 53b of the cutting member 53. Since the extending direction of the cutting part 53a and the extending direction of the cutting part 53b are orthogonal, the stress at the time of cutting the mother sheet 60 by the cutting part 53a is the same as that of the cutting of the first region 61. It will escape to the contact part 52a side, and the stress at the time of cutting to the mother sheet 60 by the cutting part 53b will escape to the contact part 52b side of the guide 52. For this reason, it is possible to avoid a state in which stress is concentrated on the microcapsules arranged in the central portion of the second region 62 of the mother sheet 60.

  After cutting the second region 62 of the mother sheet 60, the cutting member 53 is pulled up in the + Z direction, and the cut second region 62 is moved from above the stage 51. The cut second region 62 becomes a component of the electrophoresis apparatus 1 as the electrophoresis sheet 3. By repeating this operation, the electrophoretic sheets 3 are manufactured one by one from the mother sheet 60.

  Thus, according to this embodiment, the cutting part 53a and the cutting part 53b of the cutting member 53 provided so that the extending directions of the cutting part 53a and the cutting part b are orthogonal to each other are arranged on the mother sheet 60. Therefore, the stress applied from the cutting member 53 to the mother sheet 60 escapes in the direction orthogonal to the extending direction of the cutting part 53a and the cutting part 53b. For this reason, it is possible to avoid a state in which the pressure when pressing the cutting member 53 is concentrated on the central portion of the first region 61 of the mother sheet, and the microcapsules arranged in the central portion of the first region 61 are damaged. Can be avoided. Thereby, the high quality electrophoresis sheet 3 can be manufactured. In addition, an expensive apparatus such as a laser apparatus is not required, and the Thomson type or Pinnacle type can be manufactured, so that the manufacturing equipment can be configured at low cost.

  Further, in the present embodiment, the mother sheet 60 has a rectangular shape in plan view, and is configured such that the extending directions of the cutting part 53a and the cutting part 53b that are continuously provided at the corners of the cutting member 53 are orthogonal to each other. ing. In this case, the cutting member 53 is arranged at the planar viewing angle portion of the mother sheet 60 so that the extending directions of the cutting portion 53a and the cutting portion 53b are parallel to two orthogonal sides of the mother sheet 60, respectively. Since the first region 61 of the planar viewing angle portion of 60 is cut, it is possible to reduce the number of cut portions as compared with the conventional case. For this reason, the influence of the stress applied to the mother sheet 60 can be reduced. In addition, by using corner portions of the mother sheet 60 without waste, it is possible to avoid cutting margins remaining at the end portions of the mother sheet 60 and to reduce costs.

  Further, according to the present embodiment, after cutting the first region 61, the mother sheet 60 is moved by the size of the first region 61 along one of two orthogonal sides of the mother sheet 60, Among them, since the second region 62 in contact with the first region 61 is cut, the section formed by cutting the first region 61 can be used as the edge of the second region 62. For this reason, the 2nd field 62 can be cut substantially like the case where the corner of mother seat 60 is cut. Thereby, since the electrophoretic sheets 3 can be manufactured one after another simply by repeating the same operation, the manufacturing efficiency can be improved. Further, similarly to the above, since it is not necessary to form a cutting margin, the mother sheet 60 can be used without waste, and the cost can be reduced.

The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, when the mother sheet 60 is cut, the mother sheet 60 is moved in a state in which the positions of the cutting member 53 in the X direction and the Y direction are fixed. Alternatively, for example, the positions of the mother sheet 60 in the X direction and the Y direction may be fixed, and the cutting member 53 may be moved in the X direction and the Y direction for cutting.

  In the above-described embodiment, when the mother sheet 60 is cut, the mother sheet 60 is first moved in the Y direction and cut one row at a time. However, the present invention is not limited to this. The direction of movement may be changed depending on the direction.

  In the above embodiment, the case where the rectangular electrophoretic sheet 3 is cut out from the rectangular mother sheet 60 has been described. However, the present invention is not limited to this, and the mother sheet 60 and the electrophoretic sheet 3 have other shapes. It doesn't matter.

  Moreover, although the said embodiment demonstrated the case where the extending direction of the cutting part 53a and the extending direction of the cutting part 53b orthogonally crossed, it is not restricted to this, The extending direction of two cutting parts is an obtuse angle It may be a case of crossing to form. In this case, the electrophoretic sheet 3 having a shape other than the rectangle can be manufactured.

  Moreover, the cutting part 53a and the cutting part 53b may be configured by separate members so that the extending directions can be adjusted independently. Thereby, the width of the shape of the electrophoretic sheet 3 that can be manufactured is widened.

1 is a plan view showing a configuration of an electrophoretic display device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the configuration of the electrophoretic display device according to the embodiment. FIG. 5 is a process diagram illustrating a manufacturing process of an electrophoretic display device. The process drawing. The process drawing. The process drawing. The process drawing. The process drawing. The process drawing. The perspective view which shows the structure of the cutting device which cut | disconnects an electrophoretic sheet. Process drawing which shows the manufacture process of an electrophoretic sheet. The process drawing. The process drawing. The process drawing.

Explanation of symbols

    DESCRIPTION OF SYMBOLS 1 ... Electrophoretic display device 2 ... Element substrate 3 ... Electrophoresis sheet 4 ... Cover glass 5 ... Display area 6 ... Non-display area 7 ... Sealing material 8 ... Connection board 10 ... Wire 11 ... Adhesive layer 30 ... Transparent substrate 31 ... Electrophoresis layer 40 ... Mother substrate 41 ... Mother connection substrate 42 ... Spacer layer 44 ... Mother protection substrate 50 ... Cutting device 51 ... Stage 52 ... Guide 52a, 52b ... Abutting portion 53 ... Cutting member 53a, 53b ... Cutting portion 60 ... Mother sheet 61 ... first region 61a ... section 62 ... second region

Claims (5)

A method for producing an electrophoretic sheet in which an electrophoretic layer is disposed on a transparent substrate,
The cutting part of the cutting member provided so that the extending directions of a plurality of cutting parts extending in different directions do not face each other is disposed on the mother transparent substrate on which the electrophoretic layer is disposed,
The method for producing an electrophoretic sheet, wherein the cutting member is pressed against the mother transparent substrate substantially simultaneously to cut a partial region of the mother transparent substrate. The mother transparent substrate is rectangular in plan view,
The cutting member has two of the cutting portions, and the extending directions of the two cutting portions are orthogonal and the two cutting portions are in contact with each other,
The cutting member is arranged at a planar viewing angle portion of the mother transparent substrate so that the extending directions of the two cutting portions are parallel to two orthogonal sides of the mother transparent substrate, respectively.
2. The electricity according to claim 1, wherein after the cutting member is arranged, the cutting member is pressed almost simultaneously with the mother transparent substrate to cut a first region of a planar viewing angle portion of the mother transparent substrate. A method for producing an electrophoresis sheet. After cutting the first region, the mother transparent substrate and the cutting member are relatively moved along one of two orthogonal sides of the mother transparent substrate by a dimension in the one direction of the first region. Let
3. The electricity according to claim 2, wherein, after the relative movement, the cutting member is pressed against the mother transparent substrate almost simultaneously to cut a second region in contact with the first region of the mother transparent substrate. A method for producing an electrophoresis sheet. The method for producing an electrophoretic sheet according to any one of claims 1 to 3, wherein the plurality of cut portions are integrally formed. An electrophoretic display device manufacturing method in which an electrophoretic sheet is bonded to an element substrate,
An electrophoretic sheet manufactured by the method for manufacturing an electrophoretic sheet according to claim 1 is bonded to the element substrate. A method for manufacturing an electrophoretic display device.

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