JP2015025864A - Method for manufacturing reflective display device and apparatus for manufacturing reflective display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a reflective display device and an apparatus for manufacturing a reflective display device, by which sealing of bubbles in a cell can be inhibited.SOLUTION: The method aims for manufacturing a reflective display device having a display medium containing at least one electro-responsive material sealed between two opposing substrates each having an electrode formed thereon, at least one of which is transparent. The method includes a counter substrate adhesion step, in which a portion where one substrate and the other substrate are pressed to each other moves from one end of the one substrate and of the other substrate to the other end; and a posture of the other substrate is maintained in such a manner that in a downstream of the portion where the one substrate and the other substrate are pressed to each other, the other substrate forms an angle of 60° to 120° with respect to the one substrate.

Description

  The present invention relates to a reflective display device manufacturing method and a reflective display device manufacturing apparatus applied to electronic paper and the like.

  Recently, as a reflective display device, an electrophoretic display device using an electrophoretic material as an electroresponsive material contained in a display medium has been widely used. An electrophoretic display device is a device that displays information by using electrophoretic migration, that is, particle movement, of an electrophoretic body (usually electrophoretic particles) in air or in a solvent. In general, an electrophoretic state is controlled by applying an electric field between two substrates, thereby realizing a desired display. As the electrophoretic body, charged powder as well as charged particles can be used. In that case, the charged powder electrophoreses in the gas.

  In recent years, the electrophoretic display device has attracted attention especially as an electronic paper. When applied as an electronic paper, it is possible to enjoy advantages such as visibility at the printed matter level (easy for eyes), ease of information rewriting, low power consumption, and light weight.

  However, in an electrophoretic display device, display defects, particularly a decrease in contrast, may occur due to sedimentation or uneven distribution of particles or powder. In order to prevent this phenomenon, it is used to form partition walls between the upper and lower electrode substrates and divide the migration space of the particles and powder to be electrophoresed, that is, the movement space into minute spaces. This minute space is called a cell. In each cell, ink or gas (display medium) containing an electrophoretic body is enclosed.

  For example, in Patent Document 1 (Japanese Patent No. 47640969), a fluid-type electrophoretic material is sealed in a capsule or cell with a binder to produce a sheet-like display medium, and the sheet-like display medium is attached to an electrode substrate. A method of sealing a display medium between upper and lower electrode substrates by sealing the outer periphery with a seal is disclosed.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2007-163660) discloses a method of enclosing a fluid electrophoretic material as it is between upper and lower electrode substrates.

Japanese Patent No. 4476409 JP 2007-163660 A

  As a cause of deterioration in display quality, there are cases where the display medium is non-uniformly enclosed and uneven display occurs, or bubbles are formed in the cells in which the display medium is enclosed.

  As a method of enclosing a liquid display medium in a cell, a display medium that exceeds the volume of the cell is disposed on one substrate, and an excess display medium overflows from the cell while enclosing the display medium in the cell. A method of bonding the one substrate and the other substrate may be employed. Even if this method is this inventor, the density | concentration of the display medium between cells may become non-uniform | heterogenous, a display nonuniformity may generate | occur | produce, or a bubble may be sealed in a cell. I found out.

  The present invention has been made based on such circumstances, and an object of the present invention is to provide a method for manufacturing a reflective display device and a reflective display device that suppress display unevenness and air bubbles being sealed in cells. It is to provide a manufacturing apparatus.

  In the present invention, a liquid display medium containing at least one or more kinds of electrically responsive materials is sealed between two opposing substrates, at least one of which has translucency and each has electrodes formed thereon. A reflective display device for producing a desired display when a predetermined electric field is applied between the two substrates, wherein a partition wall is formed in a predetermined pattern on one substrate or the other substrate. A partition forming step to be formed, a display medium arranging step of arranging the display medium on the one substrate, and a display area on the other substrate, which is used for the desired display, can be surrounded. A sealing member arranging step of arranging a sealing member for sealing the space of the display region in cooperation with the one substrate and the other substrate, and each region partitioned by the partition as a cell, the display Media is sealed in each cell A counter substrate bonding step of pressing and bonding the one substrate and the other substrate to each other, the one substrate or the other substrate having flexibility, In the counter substrate bonding step, the one substrate and the other substrate are pressed against each other from the one end side of the one substrate and the other substrate toward the other end side. And the other substrate is moved relative to the one substrate downstream of the portion where the one substrate and the other substrate are pressed in the moving direction of the portion. Thus, the reflective substrate is manufactured in such a manner that the posture of the other substrate is maintained so as to form an angle of 60 ° to 120 °.

  Preferably, the sealing member is an adhesive material including an ultraviolet curable material, and the manufacturing method of the reflective display device is performed after the counter substrate bonding step, and is applied to the one substrate and the other substrate. A sealing member curing step of curing the sealing member by irradiating ultraviolet rays.

  Preferably, the planar state of the one substrate is maintained during the counter substrate bonding step.

  Preferably, the other substrate is formed of a material having a linear expansion coefficient lower than that of the one substrate, and in the counter substrate bonding step, the one substrate and the other substrate are: Heat bonded.

  Alternatively, in the present invention, a liquid display medium including at least one kind of electrically responsive material is sealed between two opposing substrates, at least one of which has a light-transmitting property and each has an electrode. An apparatus for manufacturing a reflective display device that performs a desired display when a predetermined electric field is applied between the two substrates, the one substrate being transported substantially horizontally. A first substrate transport device provided so as to form a transport path for transporting the substrate of the first substrate, and an axis arranged substantially horizontally and intersecting a transport direction of the transport path of the one substrate, A pressing roller configured to press the other substrate disposed on the one substrate against each other, and upstream of the pressing substrate in the transport direction of the one substrate by the first substrate transport device Provided on the side A guide for guiding the posture of the other substrate so that the other substrate forms an angle of 60 ° to 120 ° with respect to the one substrate on the upstream side in the transport direction of the one substrate with respect to And a reflection type display device manufacturing apparatus.

  Preferably, the manufacturing apparatus of the reflective display device is provided on the downstream side in the transport direction of the one substrate by the first substrate transport device with respect to the pressing roller, and the one substrate and the other substrate A sealing member curing device that cures a sealing member disposed between the one substrate and the other substrate so as to jointly seal a space in the display area of the one substrate and the other substrate; ing.

  Preferably, the sealing member curing device includes an ultraviolet light source provided to irradiate the one substrate and the other substrate passing through the sealing member curing device with ultraviolet rays.

  Preferably, the distance between the position where the pressing roller and the conveyance path of the one substrate are closest to each other and the position where the ultraviolet light source is irradiated on the conveyance path of the one substrate is the distance between the one substrate and the one It is shorter than the length of the other substrate.

  Preferably, the reflective display device manufacturing apparatus further includes a heat source for heating the pressing roller.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the manufacturing method of a reflection type display apparatus and reflection type display apparatus manufacturing apparatus which suppress that display nonuniformity and a bubble is sealed in a cell.

FIG. 1 is a cross-sectional view schematically showing a configuration of a reflective display device according to an embodiment of the present invention. FIG. 2 is a flowchart schematically showing a manufacturing method of the reflective display device shown in FIG. FIG. 3 is a diagram schematically showing an example of the partition wall forming step. FIG. 4 is a diagram for explaining the definition of the width of the top surface of the partition wall. FIG. 5 is a diagram schematically showing an example of the adhesive layer forming step. FIG. 6 is a diagram schematically showing an example of the display medium arranging step. FIG. 7 is a diagram schematically showing a configuration of a reflection type display device manufacturing apparatus according to an embodiment of the present invention. FIG. 8 illustrates a difference in size of a region where a liquid pool of a display medium is formed due to a difference in angle of the other substrate with respect to the one substrate when the one substrate is bonded to the other substrate. FIG. Specifically, FIG. 8A is a diagram showing the size of a region where a liquid pool of the display medium is formed when the angle of the other substrate with respect to one substrate is large, and FIG. It is a figure which shows the magnitude | size of the area | region where the liquid reservoir of a display medium is formed when the angle of the other board | substrate with respect to the other board | substrate is small. FIG. 9 is a diagram for explaining the state of thermal deformation of the other substrate when the angle of the other substrate with respect to one substrate is 120 ° or more. FIG. 10 is a diagram for explaining the difference in the bonding state of the other substrate due to the difference in the distance between the pressure roller and the ultraviolet light source. Specifically, FIG. 10A is a diagram for explaining the bonding state of the other substrate when the distance between the pressing roller and the ultraviolet light source is shorter than the length of the substrate, and FIG. It is a figure for demonstrating the adhesion state of the other board | substrate in case the distance of a roller and a ultraviolet light source is longer than the length of a board | substrate. FIG. 11 is a diagram for explaining a difference in display quality of the display panel due to a difference in time length from when one substrate is bonded to the other substrate to when the sealing member is cured. Specifically, FIG. 11A is a diagram illustrating the display quality of the display panel when the time length is short, and FIG. 11B is a diagram illustrating the display quality of the display panel when the time length is long. It is. FIG. 12 is a diagram for explaining manufacturing conditions and evaluation results of display devices of examples and comparative examples of the present invention. FIG. 13 is a diagram showing the flow unevenness generated in the method for manufacturing the display device of the comparative example of the present invention. Specifically, FIG. 13A is a diagram showing streaky flow unevenness generated along the laminating direction when viewed from the side of one substrate toward the side of the other substrate, and FIG. FIG. 6 is a diagram illustrating a state in which the density of the display medium is different between cells of the display device in which flow unevenness occurs. FIG. 14 is a diagram showing shading unevenness. Specifically, FIG. 14 (a) is a diagram showing shading unevenness generated in a direction crossing the laminating direction when viewed from the side of one substrate toward the side of the other substrate, and FIG. It is a figure which shows a mode that the amount of sealing of the display medium between cells differs in the display apparatus in which the shading nonuniformity generate | occur | produced because the gap between board | substrates is non-uniform | heterogenous.

  FIG. 1 is a cross-sectional view schematically showing a configuration of a reflective display device according to an embodiment of the present invention. In the reflective display device according to this embodiment, at least one kind of electrically responsive material is provided between two opposing substrates 11 and 16 on which at least one has translucency and each electrode is formed. The liquid display medium 13 is sealed, and a desired display is performed when a predetermined electric field is applied between the two substrates 11 and 16. Here, in the specification and claims of the present application, “translucent” means a property of transmitting light. In the present embodiment, the substrate (one substrate 11) arranged on the viewing side has a light-transmitting property such that the total light transmittance is 50% or more, preferably 80% or more, more preferably 90% or more. have.

  1 to 14, electrodes are provided on the surfaces of one substrate 11 and the other substrate 16, but the electrodes are not shown. In the present embodiment, one substrate 11 is disposed on the viewing side, and the other substrate 16 is disposed on the non-viewing side.

  One substrate 11 includes a light-transmitting film such as polyethylene (PE), polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene naphthalate (PEN), or light-transmitting glass, and indium tin oxide (ITO). ), Zinc oxide (ZnO), tin oxide (SnO) or the like having a light-transmitting electrode (translucent electrode) so as to cover at least the display region 60 of one substrate 11 is typically used. Can be. Here, the “display area” refers to an area used for desired display in the reflective display device.

  The translucent electrode can be formed by a coating method, a vapor deposition method, or the like. Since the translucent electrode is used as a common electrode in the case of active matrix driving and segment driving, it is not always necessary to form a pattern, and the entire surface of the substrate may be an electrode. On the other hand, in the case of passive matrix driving, since both opposing substrates need to be pattern electrodes, the translucent electrode is also formed in a pattern such as a stripe.

  The thickness of one substrate 11 is preferably 10 μm to 1 mm. If it is thinner than 10 μm, the strength as the panel 80 cannot be obtained, and the risk of breakage increases. On the other hand, if it is thicker than 1 mm, the weight of the panel 80 becomes too heavy and the handling becomes inconvenient. Because it becomes higher. A suitable thickness range that is difficult to break and easy to handle is about 50 μm to 300 μm.

  One substrate 11 can be applied in either a roll shape or a sheet shape.

  As the other substrate 16, a substrate such as a resin film, a resin plate, glass, epoxy glass (glass epoxy) or the like can be used. The other substrate 16 may be a translucent base material. Furthermore, it may be an opaque base material that is translucent, but an opaque glass base material, resin film, resin plate, glass, epoxy glass with the other surface different from the electrode surface roughened. (Garaepo) or the like can be used. In the present embodiment, since the other substrate 16 is disposed at a position opposite to the viewing side, there is no necessity of having translucency. However, when the same physical properties as the one substrate 11 such as thermal expansion characteristics are required, a light-transmitting member similar to the one substrate 11 can be used. In the present embodiment, the other substrate 16 is formed of a material whose linear expansion coefficient is lower than that of one substrate 11. However, in the counter substrate bonding step described later, when a thermocompression pressure is applied from one substrate 11 side by the pressing roller 120, one substrate 11 has a linear expansion coefficient larger than that of the other substrate 16. Made of low material.

  As the electrode, a pattern electrode is used in the case of segment drive and passive matrix drive, and a pixel electrode in which a TFT (Thin Film Transistor) is arranged in the case of active matrix drive.

  The thickness of the other substrate 16 is preferably 10 μm to 1 mm, similarly to the thickness of the one substrate 11. If it is thinner than 10 μm, the strength as the panel 80 cannot be obtained, and the risk of breakage increases. On the other hand, if it is thicker than 1 mm, the weight of the panel 80 becomes too heavy and the handling becomes inconvenient. Because it becomes higher. A suitable thickness range that is difficult to break and easy to handle is about 50 μm to 300 μm.

  The other substrate 16 can be applied in either a roll shape or a sheet shape. In the present embodiment, as described later, the other substrate 16 needs to be bent so that the other substrate forms an angle of 60 ° to 120 ° with respect to the one substrate. Have. But when one board | substrate 11 is bent in order for the other board | substrate to make the angle of 60 degrees-120 degrees with respect to one board | substrate, the one board | substrate 11 should just have flexibility. . Here, in the specification and claims of the present application, “flexibility” means a degree that can be flexed.

<Method for manufacturing reflective display device>
FIG. 2 is a flowchart schematically showing a manufacturing method of the reflective display device according to the embodiment of the present invention.

  FIG. 3 is a diagram schematically showing an example of the partition wall forming step. As shown in FIG. 3, first, a partition wall 12 is formed on the upper surface of one substrate 11 generally placed in a horizontal direction by, for example, photolithography (exposure by ultraviolet (UV) irradiation → development → firing). (Partition wall forming step: step (1) in FIG. 2). The partition wall 12 is a member that defines a plurality of cells to be described later.

  In the specification and claims of the present application, the “cell” means the upper and lower electrode substrates 11, 11 to prevent display defects due to sedimentation or uneven distribution of particles or powder, in particular, reduction in contrast. This means a minute migration space of particles or powder to be electrophoresed, that is, a movement space, divided by partition walls 12 formed between 16. The partition wall 12 may be formed on the other substrate 16.

  The partition wall 12 can be composed of an ultraviolet curable resin, a thermosetting resin, a room temperature curable resin, or the like. As a method for forming the partition wall 12, a mold transfer method such as embossing can be adopted in addition to the photolithography method. Further, a method of manufacturing a structure having a desired pattern as a partition and sticking the structure to one substrate 11 may be employed.

  The width of the top surface of the partition wall 12 is 9 μm to 50 μm, preferably 9 μm to 20 μm. 9 μm is the lower limit of the line width at which the partition wall 12 can be patterned without falling down. When the width of the top surface of the partition wall 12 is less than 9 μm, in a pattern in which the length of the partition wall 12 is 60 μm or more, at least a part of the partition wall 12 falls, peels off, or the separated partition wall 12 moves over the substrate. Or move. In that case, the function of preventing the movement of particles by the partition wall 12 is lost, and the display quality is deteriorated. On the other hand, the upper limit of 50 μm, which is the upper limit of the preferred range, is an upper limit at which the partition wall 12 is not too conspicuous when visually observed.

  Here, the definition of the width of the top surface of the partition 12 is shown in FIG. If the corners of the top surface are not rounded, the width of the top surface is defined as it is, as shown in FIGS. 4 (a) and 4 (b). On the other hand, when the corner of the top surface is rounded, it is understood as the width between the intersecting lines of the extended surface of the top surface and the extended surface of the wall surface as shown in FIG. 4 (c) and FIG. 4 (d). The As a measuring method for evaluation, one substrate 11 on which the partition wall 12 was formed was embedded in a curable resin, and a cross section of the partition wall 12 was cut out by a microtome (Daiwa Kogyo Kogyo Co., Ltd .: FX-801). Each width can be measured based on an image taken by a scanning electron microscope (SEM).

  The pattern of the partition walls 12 is basically arbitrary such as a circle, a lattice, a honeycomb shape (hexagon), and other polygons. The aperture ratio is preferably 70% or more, and particularly preferably 90% or more. The higher the aperture ratio, the wider the displayable area, so that high contrast can be obtained.

  The height of the partition wall 12 is 5 to 50 μm, preferably 10 to 50 μm. If the thickness is 5 μm or less, the amount of ink to be filled is small, and sufficient display characteristics, in particular, contrast cannot be obtained. On the other hand, if the thickness is 50 μm or more, the panel 80 is too thick and the drive voltage increases excessively. From the viewpoint that good display characteristics can be obtained at a low driving voltage, a height in the range of 10 to 50 μm is preferable.

  The cell size (pitch) depends on the size of the display panel 80, but is 0.05 mm to 1 mm pitch, preferably 0.1 mm to 0.5 mm pitch. Here, the pitch means the distance between the center points of adjacent cells.

  Next, the adhesive layer 22 is formed on the partition wall 12 (adhesive layer forming step: step (2) in FIG. 2). In this adhesive layer forming step, a thermoplastic resin such as a polyester-based thermoplastic adhesive is formed with a thickness of 1 μm to 100 μm by, for example, a transfer method or a printing method. Preferably, it is formed with a thickness of 1 μm to 50 μm, particularly preferably with a thickness of 1 μm to 20 μm.

  Supplementing a specific description of an example of a typical thermal transfer method as a transfer method, as shown in FIG. 5, a heat seal agent 221 such as a polyester-based thermoplastic adhesive having a thickness of 20 μm on a PET film 21, for example. Is prepared, and the surface of the heat sealant 221 of the transfer sheet 20 is laminated on the partition wall 12 at a normal temperature and a pressure of 1 kPa. This is heated for 1 minute on a hot plate maintained at, for example, 120 ° C., which is equal to or higher than the softening temperature of the heat sealant 221, and then the transfer sheet 20 is peeled off. Thereby, an adhesive layer 22 of about 6 μm, for example, is formed on the partition wall 12.

  The adhesive layer 22 is preferably made of a thermoplastic material such as the heat sealant 221, which has the property of softening by heating and solidifying when cooled, and is plastic when it is repeatedly cooled and heated. Is a material that is reversibly maintained.

  When a heat seal agent made of a thermoplastic material is used as the adhesive layer 22, the heat seal agent 221 solidified on the transfer sheet substrate 21 is softened by heating to a temperature exceeding its softening temperature. The heat sealant 221 can be reliably thermally transferred only to the top surface of the partition wall 12. Further, since the heat sealant 221 after thermal transfer is cooled to room temperature and solidified again, tackiness, that is, stickiness, is eliminated, which is very convenient for handling. Further, since there is no tack, that is, stickiness, the display medium 13 filled in the cell does not adhere to the heat sealant 221. Then, the heat sealant 221 on the top surface of the partition wall 12 is again heated to a temperature exceeding the softening temperature to be softened, so that it has tackiness, that is, stickiness, so that it is securely bonded to the other substrate 16. The Since the heat sealant 221 after being bonded to the other substrate 16 is not tacky, that is, sticky at normal temperature again, the display medium 13 is not bonded to the heat sealant 221 again, and the display quality is deteriorated. There is no fear of it.

  Specifically, thermoplastic base polymers such as ethylene-vinyl acetate copolymer, polyester, polyamide, polyolefin, polyurethane, natural rubber, styrene-butadiene block copolymer, styrene-isoprene block copolymer, styrene-ethylene. A resin mainly composed of a thermoplastic elastomer such as a butylene-styrene block copolymer or a styrene-ethylene-propylene-styrene copolymer, and a tackifier resin or a plasticizer is mainly used.

  In order to increase the adhesion between the partition wall 12 and the heat sealant 221, the partition wall 12 may be subjected to surface treatment by ultraviolet irradiation, plasma treatment, or the like, or a primer may be formed. Alternatively, a silane coupling agent may be added to the heat seal agent 221.

  In the present embodiment, the adhesive layer forming step is performed on the top surface of the partition wall 12, but each panel 80 is sealed and sealed by the sealing member 61 disposed on the other substrate 16 in the sealing member disposing step described later. Since it is bonded, the adhesive layer forming step on the top surface of the partition wall 12 can be omitted.

  Next, the ink 13 as a display medium is placed on one substrate 11 (display medium placement step: step (3) in FIG. 2). FIG. 6 is a diagram schematically showing an example of the display medium arranging step. Here, (1) the ink 13 is dropped from the dispenser 31 or inkjet or die coat (ink dropping step), and (2) the ink 13 is made uniform in the surface by the applicator 32 or doctor blade, doctor knife, and central squeegee. It is applied (ink application process).

  As the display medium 13, a liquid display medium containing at least one kind of electrically responsive material can be used. Examples of the electroresponsive material include a charged particle material and a liquid crystal material, and the charged particle material includes a so-called electrophoretic material in which colored particles such as white, black, and color move in response to an electric field, or two particles. There are materials typified by twist balls that are color-coded and rotated by an electric field, or nanoparticle materials that move by an electric field. On the other hand, the liquid crystal material includes a material for electrically controlling transmission and scattering known as PDLC (Polymer Dispersed Liquid Crystal), a material in which a liquid crystal is mixed with a dye, a cholesteric liquid crystal material, and the like. These materials that have electrical responsiveness and change optical characteristics need to be isolated into cells regardless of the type, and are subject to application of the present invention.

  In the present embodiment, the display medium 13 is disposed on one substrate 11, but may be disposed on the other substrate 16.

  Next, on the other substrate 16, the one substrate 11 and the other substrate 16 are arranged so that the top surface of the partition wall 12 of the one substrate 11 and the other substrate 16 face each other in the counter substrate bonding step described later. A sealing member 61 that seals the space on the display region 60 in cooperation with the one substrate 11 and the other substrate 16 is disposed at a position where the display region 60 can be surrounded when the device is disposed. In the present embodiment, the sealing member 61 is arranged on the outer periphery of the display region 60 of the other substrate 16 so as to surround the display region 60 without any break (sealing member arrangement step: step (4) in FIG. 2). .

  If a specific description is supplemented about an example of the arrangement method of the sealing member 61, an adhesive such as an ultraviolet curable resin is used as the sealing member 61 with a line width of 0.5 mm and a height of 50 μm using a dispenser. It is arranged by being applied in a shape. However, the sealing member 61 can be arranged by various printing methods or thermocompression bonding in addition to the dispenser.

  Here, after being cured with ultraviolet rays, the ultraviolet curable resin is polymerized and becomes chemically stable. Therefore, when an ultraviolet curable resin is used as the sealing member 61 and cured with ultraviolet rays, there is no possibility that display performance is deteriorated due to the cured resin and the display medium 13 coming into contact with each other. The ultraviolet curable resin used for the sealing member 61 is preferably a monomer or oligomer of urethane acrylate, polyester acrylate, or epoxy acrylate. For example, CN966, CN981, CN2003A, CN964, CN9643NS, Three Bond 3033 manufactured by Sartomer , 3034, 3057, 3052, 3054, 3056B, 3170D, LCB-610 manufactured by EACH Sea, etc. are applicable. However, the sealing member 61 can be configured by a thermosetting resin, a room temperature curing resin, a heat seal resin, or the like in addition to the ultraviolet curable resin.

  Further, the sealing member 61 preferably has adhesiveness. In this case, even in the case where the posture of the one substrate 11 or the other substrate 16 is difficult to be kept flat due to the distortion of the one substrate 11 or the other substrate 16, When the display medium 13 is disposed on one substrate 11 and the other substrate 16 is bonded to the one substrate 11, no gap is formed between the sealing member 61 and both the substrates 11 and 16. The display medium 13 arranged in the display area 60 moves out of the area surrounded by the sealing member 61, so that display unevenness and generation of bubbles in the cell do not occur. As the sealing member 61 having adhesiveness, a member having a functional group such as a hydroxyl group, an alkoxy group, a urethane group, or an epoxy group capable of reacting with a substrate surface such as a film or glass is preferable.

  In this embodiment, the sealing member 61 is an adhesive containing an ultraviolet curable material such as an ultraviolet curable resin. Further, in the present embodiment, the sealing member 61 is disposed on the other substrate 16, but when the display medium 13 is disposed on the other substrate 16 in the above-described display medium disposing step, one of the sealing members 61 is disposed. Arranged on the substrate 11.

  Returning to FIG. 2, the electrodes of the other substrate 16 are arranged so as to face each other on the top surface of the partition wall 12 of the one substrate 11 placed substantially horizontally. Then, each substrate 11 and the other substrate 16 are pressed against each other so that the display medium 13 is sealed in each cell, with each region partitioned by the partition 12 being a cell, and the cell volume in the partition 12 It is bonded while extruding excess ink exceeding (the counter substrate bonding step: step (5) in FIG. 2). Thereafter, the outer periphery of the display region 60 is sealed by curing the sealing member 61 (sealing member curing step: step (6) in FIG. 2) and cut into a predetermined size (cutting step: step (7 in FIG. 2). )), The display panel 80 is manufactured.

  With reference to FIG. 7 thru | or FIG. 11, the opposing board | substrate adhesion process and sealing member hardening process in this Embodiment are demonstrated more concretely. FIG. 7 is a diagram schematically showing a configuration of a reflection type display device manufacturing apparatus according to the present embodiment. The counter substrate bonding step and the sealing member curing step in the present embodiment are performed using a reflective display device manufacturing apparatus 100 shown in FIG.

  The reflective display device manufacturing apparatus 100 includes a first substrate transport device 110 provided so as to form a transport path for transporting one substrate 11 so as to transport the one substrate 11 substantially horizontally, and a shaft 120a. The first substrate 11 and the other substrate 16 disposed on the one substrate 11 are pressed against each other in a direction that is substantially horizontal and intersects with the transport direction of the transport path of the one substrate 11. And the upstream side of the one substrate 11 in the transport direction with respect to the pressure roller 120. On the side, a guide mechanism 130 for guiding the posture of the other substrate 16 is provided so that the other substrate 16 forms an angle of 60 ° to 120 ° with respect to the one substrate 11. Here, in the specification and claims of the present case, “substantially horizontal” means that it is not limited to strict horizontal, specifically, one of the coated display media 13 is applied. This means that the display medium 13 does not have to be inclined so as not to spill from one of the substrates 11 when the substrate 11 is transported on a substantially horizontal transport path of the first substrate transport device 110. In addition, the reflective display device manufacturing apparatus 100 of the present embodiment is further provided on the downstream side in the transport direction of one substrate 11 by the first substrate transport device 110 with respect to the pressing roller 120, Sealing disposed between the one substrate 11 and the other substrate 16 so as to seal the space on the display region 60 of the one substrate 11 and the other substrate 16 in cooperation with the other substrate 16. A sealing member curing device 140 that cures the member 61 is provided.

  The first substrate transport apparatus 110 according to the present embodiment is provided on the upstream side in the transport direction of one substrate 11 with respect to the pressure roller 120, and is provided so as to be parallel to the shaft 120 a of the pressure roller 120 and rotatable. 1 feed shaft 111a, which is set on the first feed shaft 111a and used to hold and transport one substrate 11 so as to feed the first film 111 from a roll-shaped first film 111 The first feeding shaft 111a and the first feeding shaft 111a are provided downstream of the pressing roller 120 in the conveying direction of the one substrate 11 in parallel with the shaft 120a of the pressing roller 120 and rotatable. A first take-up shaft 112a that is a take-up shaft 112a and is adapted to take up the first film 111 fed from the roll-shaped first film 111 set on the first feed shaft 111a; It has. The first winding shaft 112a is driven by the driving unit 112b. Further, in the first substrate transport apparatus 110, between the first feeding shaft 111a and the first winding shaft 112a, the shafts 113a and 114a are respectively parallel and rotatable with respect to the shaft 120a of the pressing roller 120. A feed roller 113 and a backup roller 114 are provided, and a substantially horizontal transport path is formed between the first feed shaft 111a and the first take-up shaft 112a as a whole. The backup roller 114 is provided in a lower region of the pressure roller 120, and is inserted between the pressure roller 120 and the backup roller 114 while being driven by the driving unit 114b and rotated in synchronization with the pressure roller 120. The substrate 11 and the other substrate 16 can be pressed together with the pressing roller 120.

  In this embodiment, the pressing roller 120 is provided above the transport path of the first substrate transport device 110. The shaft 120a of the pressing roller 120 is driven by the driving unit 120b. The pressing roller 120 is heated by a heat source (not shown) provided in the reflective display device manufacturing apparatus 100. As a result, the sealing member 61 on the other substrate 16 is pressed against one substrate 11 on the conveyance path while applying a predetermined thermocompression pressure (laminating pressure) by the pressing roller 120, and at the same time, adhesion on the partition wall 12 is performed. The partition wall 12 and the other substrate 16 can be bonded by heating and softening the agent 221 from the periphery to a temperature exceeding its softening temperature. The outer peripheral surface of the pressing roller 120 of this embodiment is covered with rubber.

  The reflective display device manufacturing apparatus 100 according to the present embodiment is on the upstream side in the transport direction of one substrate 11 with respect to the pressing roller 120 and from the upper side of the transport path of one substrate 11 toward the transport path. A second substrate transfer device 150 for feeding the substrate 16. In the present embodiment, the second substrate transport device 150 is a second feeding shaft 151a provided in the upper region of the pressure roller 120 so as to be parallel and rotatable with respect to the shaft 120a of the pressure roller 120. A second feed shaft 151a that is set on the second feed shaft 151a and is used to hold and transport the other substrate 16 and feeds the roll-shaped second film 151; The second winding shaft provided on the downstream side in the transport direction of one substrate 11 and above the transport path of one substrate 11 so as to be parallel to and rotatable with respect to the shaft 120a of the pressing roller 120. 152a, a second take-up shaft 152a configured to take up the second film 151 fed from the roll-shaped second film 151 set on the second feed shaft 151a. ing. The second winding shaft 152a is driven by the driving unit 152b. In this way, in the second substrate transport apparatus 150, the end on the unwinding start side is fixed to the second winding shaft 152a, is wound around the pressing roller 120, and is set on the second feeding shaft 151a. 2 The other substrate 16 fixed to the film 151 is transported along the outer peripheral surface of the pressing roller 120 and can be inserted between the transport path of the one substrate 11 and the pressing roller 120. .

  In this embodiment, the guide mechanism 130 is an upper region of the pressure roller 120, and is a lower region of the second feeding shaft 151 a of the second substrate transport apparatus 150, and the shaft 130 a is opposed to the shaft 120 a of the pressure roller 120. The guide roller is provided so as to be parallel and rotatable. Further, the guide roller 130 is provided so as to be movable in the upstream direction and the downstream direction (left and right direction in FIG. 7) of the transport direction of the one substrate 11, and is a roll-shaped second roller set on the second feed shaft 151a. The angle of the second film 151 fed from the second film 151 and wound around the pressing roller 120 with respect to the conveyance path of one substrate 11 can be adjusted.

  In this embodiment, the sealing member curing device 140 irradiates one substrate 11 and the other substrate 16 passing through the sealing member curing device 140 with ultraviolet rays above and below the conveyance path of the one substrate 11. An ultraviolet light source 141 is provided. However, the ultraviolet light source 141 may be provided only on one of the upper side and the lower side of the conveyance path of one substrate 11 or may be provided on the side of the conveyance path.

  In the counter substrate bonding step of the present embodiment, when one substrate 11 and the other substrate 16 are pressed and bonded together, the other substrate 16 and the other substrate 16 are connected to the other end side. A portion where one substrate 11 and the other substrate 16 are pressed against each other is moved toward the end side. In this way, when one substrate 11 and the other substrate 16 are bonded together while extruding the excess display medium 13 from the cell, as shown in FIG. 8, the one substrate 11 and the other substrate 16 are pressed. On the downstream side in the movement direction of the part, the excess display medium 13 pushed out from the cell contacts the other substrate 16 to form a liquid pool. According to the knowledge obtained by the present inventors, in the region where the liquid pool of the surplus display medium 13 is formed, the state in which the display medium 13 is arranged is disturbed by the flow of the display medium 13, and the cell The concentration of the sealed display medium 13 becomes non-uniform between cells, causing display unevenness called flow unevenness or streak unevenness along the laminating direction (see FIG. 13), or bubbles are mixed into the display medium 13. May end up. As shown in FIG. 8A and FIG. 8B, the size of the area where the liquid pool of the excessive display medium 13 is formed is larger than the area where one substrate 11 and the other substrate 16 are pressed. Also, the larger the angle of the other substrate 16 with respect to the one substrate 11 in the downstream of the moving direction of the part, the lower the value.

  Therefore, in the reflective display device manufacturing apparatus 100 of the present embodiment, the part of the other substrate 16 is located downstream of the part where the one substrate 11 and the other substrate 16 are pressed in the moving direction of the part. The posture of the other substrate 16 is guided by the guide roller 130 so that the angle θ with respect to one substrate 11 is 60 ° or more. As a result, the size of the region where the liquid pool of the excess display medium 13 is formed is sufficiently reduced downstream of the portion where the one substrate 11 and the other substrate 16 are pressed in the movement direction of the portion. In addition, the risk of bubbles being mixed into the display medium 13 in the region is sufficiently reduced. Here, the angle θ of the other substrate 16 with respect to the one substrate 11 downstream of the portion where the one substrate 11 and the other substrate 16 are pressed in the moving direction of the portion is the axis 130a of the guide roller 130. In contrast to the outer peripheral surface of the guide roller 130 on the upstream side (left side in FIG. 7) of the one substrate 11 and the shaft 120a of the pressure roller 120 on the upstream side (left side in FIG. 7). The angle formed by the surface in contact with the outer peripheral surface of the pressing roller 120 and the transport path of the one substrate 11 is formed.

  Further, as shown in FIG. 9, the angle θ of the other substrate 16 with respect to the one substrate 11 is downstream of the portion where the one substrate 11 and the other substrate 16 are pressed in the moving direction of the portion. If it is too large, the other substrate 16 is thermally deformed along the outer peripheral surface of the pressing roller 120 and curled. As a result, even if the other substrate 16 is bonded to one substrate 11, it may be peeled off from one substrate 11.

  Therefore, in the reflective display device manufacturing apparatus 100 of the present embodiment, the part of the other substrate 16 is located downstream of the part where the one substrate 11 and the other substrate 16 are pressed in the moving direction of the part. The posture of the other substrate 16 is guided by the guide roller 130 so that the angle θ with respect to one substrate 11 is 120 ° or less. If the angle θ of the other substrate 16 with respect to the one substrate 11 on the upstream side in the conveying direction of the one substrate 11 with respect to the pressing roller 120 is 120 ° or less, the outer surface of the pressing roller 120 of the other substrate 16 is aligned. The degree of thermal deformation is sufficiently reduced, and the possibility that the other substrate 16 is peeled off from one substrate 11 after being bonded to the other substrate 11 is sufficiently reduced.

  The diameter R of the pressing roller 120 is preferably 50 mm or more. If it is 50 mm or more, the intensity | strength of the press roller 120 will become a desired grade or more. As a result, the one substrate 11 and the other substrate 16 passing through the lower region of the pressing roller 120 are subjected to the substrate from one side of the one substrate 11 and the other substrate 16 to the other side during the laminating process. The pressing force can be continuously applied so that the gap between 11 and 16 is uniform. Thereby, since the volume of a cell can be made uniform over the whole of one substrate 11 and the other substrate 16, the amount of the display medium 13 enclosed can be made uniform between cells. Accordingly, the strength of the pressing roller 120 is insufficient, and the pressing force is applied so that the gap between the substrates 11 and 16 is uniform from one side of the one substrate 11 and the other substrate 16 to the other side during the laminating process. Cannot be continuously applied, the gap between the substrates 11 and 16 becomes non-uniform, and the display amount of the display medium 13 varies between cells. The occurrence of unevenness is suppressed (see FIG. 14). Further, the pressing roller 120 can be heated uniformly from one end portion to the other end portion. As a result, it is suppressed that the adhesive layer 22 of one substrate 11 and the other substrate 16 are not adhered as desired, and a gap is formed between the adhesive layer 22 and the other substrate 16. As a result, it is possible to suppress the display medium 13 from moving between cells and causing variations in the density of the display medium 13 between cells.

  Moreover, it is preferable that the diameter R of the pressing roller 120 is 150 mm or less. If it is 150 mm or less, as described above, the liquid pool of the excess display medium 13 pushed out from the cell is more downstream in the moving direction of the part than the part where the one substrate 11 and the other substrate 16 are pressed. The size of the area to be formed is sufficiently reduced, and the risk of bubbles being mixed into the display medium 13 is also sufficiently reduced.

  The position of the sealing member curing device 140 with respect to the pressing roller 120 is determined in consideration of the following points. First, in order to prevent the other substrate 16 pressed by the pressing roller 120 and bonded to the one substrate 11 from being peeled off from the one substrate 11, the one substrate 11 and the other substrate 16 It is preferable that a part of the sealing member 61 between the one substrate 11 and the other substrate 16 is cured while being pressed by the pressing roller 120. Second, when the one substrate 11 and the other substrate 16 are arranged to face each other, the uncured sealing member 61 on the other substrate 16 and the display medium 13 on the one substrate 11 are brought into contact with each other. As a result, the uncured sealing member 61 and the display medium 13 are mixed with each other, which may cause a display defect in the display panel 80, or the sealing performance of the sealing member 61 is deteriorated. There is a risk of it. Therefore, the sealing member 61 needs to be cured in a sufficiently short time after the uncured sealing member 61 on the other substrate 16 and the display medium 13 on the one substrate 11 are brought into contact with each other. Third, if the distance between the sealing member curing device 140 and the pressing roller 120 is too short, the rubber provided on the outer peripheral surface of the pressing roller 120 is irradiated with the ultraviolet rays of the sealing member curing device 140 to deteriorate the rubber. There is a risk of it.

  In view of the above, in the present embodiment, as shown in FIG. 10A, the position of the sealing member curing device 140 with respect to the pressing roller 120 is most between the pressing roller 120 and the conveyance path of one substrate 11. The distance l between the adjacent position 120p and the position 141p irradiated with the ultraviolet light source 141 on the transport path of the one substrate 11 is shorter than the length L of the one substrate 11 and the other substrate 16. It is determined. Accordingly, a part of the sealing member 61 between the one substrate 11 and the other substrate 16 is cured while the one substrate 11 and the other substrate 16 are pressed. As a result, as shown in FIG. 10B, the other substrate 16 that is pressed by the pressing roller 120 and bonded to the one substrate 11 is prevented from being peeled off from the one substrate 11. In addition, since the length L of the one substrate 11 and the other substrate 16 is usually about 400 mm, the one substrate 11 and the other substrate 16 are arranged to face each other and the display medium 13 on the one substrate 11 is disposed. And the uncured sealing member 61 on the other substrate 16 can be cured in a sufficiently short time after the contact. As a result, before the uncured sealing member 61 and the display medium 13 are mixed, the sealing member 61 is cured. As a result, as shown in FIG. There is a reduced risk that the sealing performance of the sealing member 61 is deteriorated.

  In the present embodiment, the position of the sealing member curing device 140 relative to the pressure roller 120 is the position 120p where the pressure roller 120 and the conveyance path of one substrate 11 are closest to each other, and the conveyance path of the one substrate 11. The distance l from the position 141p irradiated with the ultraviolet light source 141 is determined to be 50 mm or more. Thereby, the rubber | gum on the surface of the press roller 120 is irradiated with ultraviolet rays by the sealing member curing device 140, and the possibility that the rubber is deteriorated is reduced.

  Next, the operation of the reflective display device manufacturing apparatus 100 of the present embodiment configured as above will be described. In the present embodiment, the one substrate 11 is formed of glass or the like before the counter substrate bonding step is performed so that the planar state of the one substrate 11 is maintained during the counter substrate bonding step. It is fixed on the substrate 14. In addition, as a method of maintaining the planar state of one substrate 11 during the counter substrate bonding process, another method can be employed. For example, when one substrate 11 is applied with tension, A planar state may be maintained.

  First, the roll-shaped first film 111 is set on the first feed shaft 111a of the first substrate transport apparatus 110, and the first film 111 is unwound from the roll-shaped first film 111, and above the feed roller 113. In addition, the end of the unwinding start side of the first film 111 is fixed to the first winding shaft 112a by passing below the pressing roller 120. One substrate 11 on which the display medium 13 is arranged in the display medium arranging step is fixed on the rigid substrate 14 between the pressing roller 120 and the first feeding shaft 11 a on the first film 111. It is fixed with tape. However, when the display medium 13 is disposed on the other substrate 16, the other substrate 16 is fixed on the first film 111 while being fixed to the rigid substrate 14.

  Next, the roll-shaped second film 151 is set on the second feeding shaft 151 a of the second substrate transport apparatus 150, and the second film 151 is unwound from the roll-shaped second film 151, and the guide roller 130. Is passed through the upstream side in the conveyance direction of one substrate 11, wound around the pressure roller 120, passed between the pressure roller 120 and the first film 111, and the second film 151. The end on the unwinding start side is fixed to the second winding shaft 152a. And between the press roller 120 and the 2nd feeding shaft 151a, the other board | substrate 16 by which the sealing member 61 was arrange | positioned by the sealing member arrangement | positioning process on the surface on the opposite side to the guide roller 130 of the 2nd film 151 is. Fixed with tape or the like. The position of the other substrate 16 on the second film 151 is such that the sealing member 61 on the other substrate 16 is arranged on the outer periphery of the display region 60 when the one substrate 11 and the other substrate 16 are pressed by the pressing roller 120. As described above, the position of one substrate 11 on the first film 111 is adjusted.

  Next, the position of the guide roller 130 is adjusted such that the other substrate 16 forms an angle of 60 ° to 120 ° with respect to the one substrate 11 on the first film 111.

  Thereafter, the first film 111 is fed at a desired speed from the roll-shaped first film 111 set on the first feeding shaft 111a by the rotational drive of the driving unit 112b of the first winding shaft 112a. The substrate 11 is moved toward the pressing roller 120. At the same time, the second film 151 from the roll-shaped second film 151 set on the second feeding shaft 151a is fed to the feeding speed of the first film 111 by the rotational driving of the driving unit 152b of the second winding shaft 152a. The other substrate 16 is moved along the outer peripheral surface of the pressing roller 120. Thereafter, the one substrate 11 and the other substrate 16 are disposed so as to face each other from the one end portion side to the other end portion side of the one substrate 11 and the other substrate 16. The pressure roller 120 is pressed.

  The sealing member 61 on the other substrate 16 is adhered to the one substrate 11 while a predetermined thermocompression bonding pressure (laminating pressure) is applied by the pressing roller 120 and the backup roller 114, and at the same time, adhesion on the partition wall 12. The heat sealing agent 221 of the layer 22 is heated from the periphery to a temperature exceeding its softening temperature and is softened, whereby the adhesive layer 22 on the partition wall 12 and the other substrate 16 are bonded.

  The one substrate 11 and the other substrate 16 that have passed through the lower region of the pressure roller 120 are sent to the sealing member curing device 140 along with the rotation of the first winding shaft 112a and the second winding shaft 152a, and ultraviolet rays are transmitted. Ultraviolet rays are irradiated by the light source 141. As a result, the sealing member 61 between the one substrate 11 and the other substrate 16 is cured, and the outer periphery of the display region 60 is sealed.

  As described above, according to the present embodiment, the one substrate 11 and the other substrate 16 are more in the region than the region where the one substrate 11 and the other substrate 16 are pressed and bonded. On the downstream side in the moving direction, the other substrate 16 forms an angle θ of 60 ° to 120 ° with respect to the one substrate 11. Therefore, the size of the area where the surplus display medium 13 pushed out of the cell contacts the other substrate 16 is sufficiently reduced, and the area where the liquid pool of the surplus display medium 13 is formed is also sufficiently reduced. The As a result, the concentration of the display medium sealed in the cells is not uniform between the cells and bubbles are prevented from being mixed into the display medium 13, causing display unevenness or bubbles with the display medium 13. It is suppressed that it is sealed in the cell.

  The sealing member 61 is an adhesive containing an ultraviolet curable material, and the manufacturing method of the reflective display device is performed after the counter substrate bonding step, and the ultraviolet light is applied to the one substrate 11 and the other substrate 16. Is further provided with a sealing member curing step for curing the sealing member 61. For this reason, it is easy to seal the display medium 13 between the one substrate 11 and the other substrate 16.

  Further, the planar state of one substrate 11 is maintained during the counter substrate bonding step. In this case, when one substrate 11 and the other substrate 16 are bonded together, it is possible to suppress the formation of wrinkles and distortions in the one substrate 11 and the other substrate 16.

  Further, the other substrate 16 is formed of a material having a linear expansion coefficient lower than that of the one substrate 11, and in the counter substrate bonding step, the one substrate 11 and the other substrate 16 are bonded by heating. Is done. For this reason, in this embodiment, when one substrate and the other substrate are heat-bonded, a thermocompression pressure for bonding the one substrate and the other substrate to each other is applied from the other substrate 16 side. It is possible to prevent the display panel 80 from being distorted because the other substrate 16 is contracted after the substrate 11 and the other substrate 16 are bonded.

  Further, the distance between the position where the pressing roller 120 and the conveyance path of one substrate 11 are closest to each other and the position where the ultraviolet light source 141 is irradiated on the conveyance path of the one substrate 11 are the distance between the one substrate 11 and the other. Shorter than the length L of the substrate 16. For this reason, while one substrate 11 and the other substrate 16 are pressed by the pressing roller 120, a part of the sealing member 61 disposed between the one substrate 11 and the other substrate 16 is removed. It can be cured. Thereby, after the one substrate 11 and the other substrate 16 are pressed and bonded by the pressure roller 120, the other substrate 16 is peeled off from the one substrate 11 before the sealing member 61 is cured. It is suppressed.

  The reflective display device manufacturing apparatus 100 further includes a heat source that heats the pressing roller 120. For this reason, one board | substrate 11 and the other board | substrate 16 can be adhere | attached with a thermoplastic adhesive.

  Next, practical examples actually performed will be described.

<Example of Reflective Display Device>
<Example 1-1>
One substrate 11 is a 300 mm × 300 mm × 0.125 mm thick PET film (Cosmo Shine manufactured by Toyobo Co., Ltd., linear expansion coefficient 20 ppm / ° C.) on one surface as an indium tin oxide (ITO) deposited film (thickness). A flexible substrate provided with 0.2 μm) was prepared. The transparent electrode is formed by a general film formation method such as sputtering, vacuum evaporation, or CVD, and is also formed by zinc oxide (ZnO), tin oxide (SnO), etc. in addition to indium tin oxide (ITO). obtain.

Next, a negative photosensitive resin material (DuPont MRC Dry Film Resistry Dry Film Resist) is laminated on the one substrate 11 to a thickness of 30 μm and heated at 100 ° C. for 1 minute. Then, exposure is performed using an exposure mask (exposure amount: 500 mJ / cm ² ), and then development using a 1% KOH aqueous solution is performed for 30 seconds, followed by baking at 200 ° C. for 60 minutes, so that the cell pitch is 300 μm. A partition wall 12 having a honeycomb pattern was formed. The width of the top surface of the partition wall 12 on the adhesive layer side was 20 μm.

  A polyethylene terephthalate (PET) film (manufactured by Teijin DuPont) having a thickness of 50 μm is used as the transfer film substrate 21, and a heat sealant 221 (UR1400 manufactured by Toyobo Co., Ltd.) having a thickness of 10 μm is applied thereto by a die coater. , Dried. Thereby, a roll-shaped transfer sheet 20 having a 10 μm adhesive layer was produced. The softening temperature of the heat sealant 221 was about 110 ° C.

  Then, with the transfer sheet 20 placed on the top surface of the partition wall 12, the periphery of the heat sealant 221 is heated to a temperature exceeding its softening temperature, for example, about 100 ° C., while further applying a pressing force of about 1 kPa. After that, the transfer sheet 20 was peeled from one substrate 11. As a result, the heat sealant 221 was thermally transferred to the entire top surface of the partition wall 12. The height from the top surface of the partition wall 12 to the top of the heat sealant 221, that is, the height from the top surface of the partition wall 12 to the top of the heat sealant 221 was about 10 μm.

  Subsequently, with one substrate 11 facing up on the side on which the partition wall 12 is formed, a silicone rubber sheet (300 mm x 300 mm x 300 mm x 300 mm x 1.00 mm) on a non-alkali glass substrate 14 (300 mm x 300 mm x thickness 1.00 mm). (Thickness 0.50 mm).

  Next, as the other substrate 16, various electrodes such as a Cu electrode are formed in a pattern on a display region 60 of a PEN film (Teonex made by Teijin DuPont, linear expansion coefficient 13 ppm / ° C.) of 300 mm × 300 mm × thickness 0.10 mm. What was done was used. The patterned electrode was formed to correspond to a drive electrode of a panel equivalent to 12 inches. The pattern formation of various electrodes was performed by a general etching method.

  Next, an ultraviolet curable resin (LCB-610 manufactured by ECH) as the sealing member 61 was applied to the outer periphery of the display region 60 of the other substrate 16 without any break using a dispenser. The sealing member 61 had a line width of 0.5 m and a thickness of 30 μm.

Subsequently, an ink 13 having the following components is used as a display medium, dropped from the dispenser 31, and squeegeeed with a central squeegee 32 (Neurong squeegee: urethane resin), and the substrate 11 It was applied so as to cover at least the display area 60 and filled in each cell.
<Ink component>
・ Electrophoretic particles (titanium dioxide): 60 parts by weight ・ Dispersion liquid: 40 parts by weight

  Next, the counter substrate bonding step and the sealing member curing step were performed using the reflective display device manufacturing apparatus 100. At this time, the guide roller 130 is arranged so that the other substrate 16 forms an angle θ of 60 ° with respect to the one substrate 11 on the upstream side in the conveyance direction of the one substrate 11 with respect to the pressing roller 120. It was. Then, a roll-shaped first film 111 is set on the first feeding shaft 111 a of the first substrate transport apparatus 110, and the first film 111 is unwound from the roll-shaped first film 111, and above the feed roller 113. And the lower end of the first film 111 was fixed to the first winding shaft 112a by passing under the pressing roller 120. Then, the one substrate 11 on which the display medium 13 is arranged is fixed to the non-alkali glass substrate 14 between the pressing roller 120 and the first feeding shaft 111a, and the mending is performed on the first film 111. Fixed with tape.

  Next, the roll-shaped second film 151 is set on the second feeding shaft 151 a of the second substrate transport apparatus 150, and the second film 151 is unwound from the roll-shaped second film 151, and the guide roller 130. Is passed between the pressure roller 120 and the first film 111, and the end of the unwinding start side of the second film 151 is the first end. 2 fixed to the winding shaft 152a. Then, between the pressing roller 120 and the second feeding shaft 151a, the other substrate 16 on which the sealing member 61 is disposed on the surface opposite to the guide roller 130 of the second film 151 is a mending tape. fixed. At this time, the position of the other substrate 16 on the second film 151 is such that when the one roller 11 and the other substrate 16 are pressed by the pressing roller 120, the sealing member 61 on the other substrate 16 is in the display area 60. It was determined with respect to the position of one substrate 11 on the first film 111 so as to be arranged on the outer periphery.

  Thereafter, the first film 111 is fed at a desired speed from the roll-shaped first film 111 set on the first feeding shaft 111a by the rotational drive of the driving unit 112b of the first winding shaft 112a. The substrate 11 was moved toward the pressing roller 120. At the same time, the second film 151 from the roll-shaped second film 151 set on the second feeding shaft 151a is adjusted to the feeding speed of the first film 111 by the rotational drive of the driving unit 152b of the second take-up shaft 152a. Then, the other substrate 16 was moved along the outer peripheral surface of the pressing roller 120. Thereafter, the one substrate 11 and the other substrate 16 are heated to 100 ° C. in the atmosphere from one end side of the one substrate 11 and the other substrate 16 toward the other end portion. A constant pressing force was applied by the pressed roller 120 and the backup roller 114, and the excess ink 13 on one substrate 11 was adhered while being pushed out. The diameter R of the pressing roller 120 was 50 mm.

Then, the one substrate 11 and the other substrate 16 are conveyed to the sealing member curing device 140 as the films 111 and 115 move, and are exposed to ultraviolet rays from the LED ultraviolet light source 141 (exposure amount 3000 mJ / cm ² ). The sealing member 61 between the one substrate 11 and the other substrate 16 was cured. The distance l between the position 120p where the pressing roller 120 and the transport path of the one substrate 11 are closest to each other and the position 141p where the ultraviolet light source 141 is irradiated on the transport path of the one substrate 11 is as follows. It was 100 mm shorter than the length of the other substrate 16.

  Thereafter, the one substrate 11 and the other substrate 16 were cut into a predetermined size by the cutting device 51, and the display panel 80 was manufactured.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness due to the difference in the enclosed amount of the display medium 13 between the cells and the display defect caused by mixing the ink 13 with the sealing member 61 did not occur.

<Example 1-2>
With respect to the embodiment 1-1, the other substrate 16 forms an angle θ of 90 ° with respect to the one substrate 11 on the upstream side in the conveyance direction of the one substrate 11 with respect to the pressing roller 120. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness due to the difference in the enclosed amount of the display medium 13 between the cells and the display defect caused by mixing the ink 13 with the sealing member 61 did not occur.

<Example 1-3>
With respect to Example 1-1, on the upstream side of the pressing roller 120 in the conveyance direction of one substrate 11, the other substrate 16 forms an angle θ of 120 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness due to the difference in the enclosed amount of the display medium 13 between the cells and the display defect caused by mixing the ink 13 with the sealing member 61 did not occur.

<Comparative Example 1-1>
With respect to Example 1-1, on the upstream side of the pressure roller 120 in the conveyance direction of one substrate 11, the other substrate 16 forms an angle θ of 30 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display quality of the display panel 80 obtained as described above was evaluated, bubbles were confirmed in the cell. Further, as shown in FIG. 13, display flow unevenness caused by the display medium 13 flowing in the excessive liquid storage of the display medium 13 occurred.

<Comparative Example 1-2>
With respect to Example 1-1, on the upstream side of the pressing roller 120 in the conveyance direction of one substrate 11, the other substrate 16 forms an angle θ of 150 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16, the other substrate 16 was curled, and a part of the substrate was one substrate. 11 was peeled off.

<Example 2-1>
A display panel 80 was manufactured in the same process as in Example 1-1 except that a roller having a diameter R of 100 mm was used as the pressing roller 120.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness due to the difference in the enclosed amount of the display medium 13 between the cells and the display defect caused by mixing the ink 13 with the sealing member 61 did not occur.

<Example 2-2>
With respect to the embodiment 2-1, on the upstream side of the pressure roller 120 in the conveyance direction of one substrate 11, the other substrate 16 forms an angle θ of 90 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness caused by the gap between the one substrate 11 and the other substrate 16 being not uniform over the entire substrates 11 and 16 and the display defect caused by mixing the ink 13 with the sealing member 61 do not occur. It was.

<Example 2-3>
With respect to Example 2-1 above, the other substrate 16 forms an angle θ of 120 ° with respect to the one substrate 11 on the upstream side in the transport direction of the one substrate 11 with respect to the pressing roller 120. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness caused by the gap between the one substrate 11 and the other substrate 16 being not uniform over the entire substrates 11 and 16 and the display defect caused by mixing the ink 13 with the sealing member 61 do not occur. It was.

<Comparative Example 2-1>
With respect to Example 2-1 above, the other substrate 16 forms an angle θ of 30 ° with respect to the one substrate 11 on the upstream side in the transport direction of the one substrate 11 with respect to the pressing roller 120. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display quality of the display panel 80 obtained as described above was evaluated, bubbles were confirmed in the cell. Further, as shown in FIG. 13, display flow unevenness caused by the display medium 13 flowing in the excessive liquid storage of the display medium 13 occurred.

<Comparative Example 2-2>
With respect to Example 2-1 above, the other substrate 16 forms an angle θ of 150 ° with respect to the one substrate 11 on the upstream side in the transport direction of the one substrate 11 with respect to the pressing roller 120. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16, the other substrate 16 was curled, and a part of the substrate was one substrate. 11 was peeled off.

<Example 3-1>
A display panel 80 was manufactured in the same process as in Example 1-1 except that a roller having a diameter R of 150 mm was used as the pressing roller 120.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness caused by the gap between the one substrate 11 and the other substrate 16 being not uniform over the entire substrates 11 and 16 and the display defect caused by mixing the ink 13 with the sealing member 61 do not occur. It was.

<Example 3-2>
With respect to Example 3-1 above, the other substrate 16 forms an angle θ of 90 ° with respect to the one substrate 11 on the upstream side in the transport direction of the one substrate 11 with respect to the pressing roller 120. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness caused by the gap between the one substrate 11 and the other substrate 16 being not uniform over the entire substrates 11 and 16 and the display defect caused by mixing the ink 13 with the sealing member 61 do not occur. It was.

<Example 3-3>
With respect to Example 3-1, on the upstream side of the pressing roller 120 in the conveyance direction of one substrate 11, the other substrate 16 forms an angle θ of 120 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  The display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16 and was satisfactory. Further, when the display quality of the display panel 80 was evaluated, bubbles were not confirmed in the cell, and display flow unevenness caused by the display medium 13 flowing in the liquid pool of the excessive display medium 13 The display unevenness caused by the gap between the one substrate 11 and the other substrate 16 being not uniform over the entire substrates 11 and 16 and the display defect caused by mixing the ink 13 with the sealing member 61 do not occur. It was.

<Comparative Example 3-1>
With respect to the example 3-1, the upstream side of the one substrate 11 in the transport direction of the one substrate 11 with respect to the pressing roller 120 is such that the other substrate 16 forms an angle θ of 30 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display quality of the display panel 80 obtained as described above was evaluated, bubbles were confirmed in the cell. Further, as shown in FIG. 13, display flow unevenness caused by the display medium 13 flowing in the excessive liquid storage of the display medium 13 occurred.

<Comparative Example 3-2>
With respect to the example 3-1, the upstream side of the one substrate 11 in the transport direction of the one substrate 11 with respect to the pressing roller 120 is such that the other substrate 16 forms an angle θ of 150 ° with respect to the one substrate 11. The display panel 80 was manufactured in the same process except that the guide roller 130 was disposed.

  When the display panel 80 obtained as described above was evaluated for the adhesion state between the one substrate 11 and the other substrate 16, the other substrate 16 was curled, and a part of the substrate was one substrate. 11 was peeled off.

11 One substrate 12 Partition 13 Ink (display medium)
14 Rigid base material 16 Other substrate 22 Adhesive layer 221 Adhesive (heat seal agent)
26 Room temperature roller 31 Dispenser 32 Central squeegee (squeegee 1)
33a, 33b Both-end squeegee (squeegee 2)
34 Roll wiper 51 Cutting device 60 Display area 61 Sealing member 100 Reflective display device manufacturing device 110 First substrate transport device 111 First film 111a Feed shaft 112a Take-up shaft 112b Drive unit 113 Feed roller 120 Press roller 130 Guide mechanism (guide) roller)
130a shaft 140 sealing member curing device 141 ultraviolet light source 150 second substrate transport device 151a feed shaft 152a take-up shaft 152b drive unit 151 second film

Claims (9)

A liquid display medium containing at least one or more kinds of electrically responsive materials is sealed between two opposing substrates on which at least one has translucency and each has electrodes formed thereon. A method of manufacturing a reflective display device that performs a desired display when a predetermined electric field is applied between the substrates.
A partition formation step of forming a partition in a predetermined pattern on one substrate or the other substrate;
A display medium disposing step of disposing the display medium on the one substrate;
The space of the display region is sealed together with the one substrate and the other substrate at a position on the other substrate so as to surround the display region used for the desired display. A sealing member arranging step of arranging the sealing member;
A counter substrate bonding step of pressing and bonding the one substrate and the other substrate to each other so that the display medium is sealed in each cell with each region partitioned by the partition walls as a cell,
With
The one substrate or the other substrate has flexibility,
In the counter substrate bonding step,
The portion where the one substrate and the other substrate are pressed against each other is moved from the one end portion side of the one substrate and the other substrate toward the other end portion side. And
In the downstream of the moving direction of the part from the part where the one substrate and the other substrate are pressed, the other substrate forms an angle of 60 ° to 120 ° with respect to the one substrate. A method of manufacturing a reflective display device, wherein the posture of the other substrate is maintained. The sealing member is an adhesive containing an ultraviolet curable material,
The manufacturing method of the reflective display device further includes a sealing member curing step that is performed after the counter substrate bonding step and that cures the sealing member by irradiating the one substrate and the other substrate with ultraviolet rays. The method for manufacturing a reflective display device according to claim 1, wherein: The method for manufacturing a reflective display device according to claim 1, wherein the planar state of the one substrate is maintained during the counter substrate bonding step. The other substrate is formed of a material having a linear expansion coefficient lower than that of the one substrate,
4. The method of manufacturing a reflective display device according to claim 1, wherein, in the counter substrate bonding step, the one substrate and the other substrate are bonded by heating. A liquid display medium containing at least one or more kinds of electrically responsive materials is sealed between two opposing substrates on which at least one has translucency and each has electrodes formed thereon. An apparatus for manufacturing a reflective display device that performs a desired display when a predetermined electric field is applied between the substrates.
A first substrate transport device provided to form a transport path for transporting the one substrate so as to transport one substrate substantially horizontally;
The shaft is disposed substantially horizontally and intersects the transport direction of the transport path of the one substrate, and presses the one substrate and the other substrate disposed on the one substrate against each other. A pressing roller,
Provided on the upstream side in the conveyance direction of the one substrate by the first substrate conveyance device with respect to the pressure roller, and on the upstream side in the conveyance direction of the one substrate relative to the pressure roller, the other substrate is A guide mechanism for guiding the posture of the other substrate so as to form an angle of 60 ° to 120 ° with respect to the one substrate;
A reflective display device manufacturing apparatus comprising: Provided on the downstream side in the conveyance direction of the one substrate by the first substrate conveyance device with respect to the pressing roller, and together with the one substrate and the other substrate, the one substrate and the other substrate The reflection member according to claim 5, further comprising: a sealing member curing device that cures a sealing member disposed between the one substrate and the other substrate so as to seal a space of the display region. Type display device manufacturing equipment. The said sealing member hardening apparatus has an ultraviolet light source provided so that an ultraviolet-ray may be irradiated with respect to said one board | substrate and said other board | substrate which pass the said sealing member hardening apparatus. 6. A reflective display device manufacturing apparatus according to 6. The distance between the position where the pressing roller and the conveyance path of the one substrate are closest to each other and the position where the ultraviolet light source is irradiated on the conveyance path of the one substrate are the one substrate and the other substrate. The reflective display device manufacturing apparatus according to claim 7, wherein the reflective display device manufacturing apparatus is shorter than the length of the reflective display device. The reflection type display device manufacturing apparatus according to claim 5, further comprising a heat source for heating the pressing roller.