JP2015064495A - Reflection type display device and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection type display device in which a plurality of different types of display media having different combinations of displayable colors or hues without impairing the display characteristics of the display media are arranged at respective desired positions.SOLUTION: A reflection type display device has display media including electrically responsive material inserted between opposing substrates, and includes first display media and second display media arranged between one substrate and the other substrate, where the other substrate at least includes first other side substrate pieces arranged opposite to the first display media and second other side substrate pieces arranged opposite to the second display media. The first display media include first electrically responsive material, and the second display media include second electrically responsive material; the color or hue of the first electrically responsive material is different from the color or hue of the second electrically responsive material.

Description

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

  Recently, electrophoretic display devices have been widely used as reflective display devices. 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 dispersion medium. 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.

  In an electrophoretic display device, information can usually be displayed in two colors depending on the electrophoretic state of an electrophoretic body contained in a display medium. The combination of two colors that can be displayed can be selected as desired by selecting the color of the charged particles and the color of the dispersion medium contained in the display medium as desired.

  In such an electrophoretic display device, in order to perform display in three or more colors, a plurality of types of display media having different combinations of colors that can be displayed are prepared, and the plurality of types of display media are respectively set at desired locations. Arrangement is adopted.

  For example, in Patent Document 1 (Japanese Patent No. 4797282), a display medium encapsulated in microcapsules is applied together with a binder, and the applied display medium is patterned to remove display media other than a desired portion. A method of arranging a desired display medium at a desired location by alternately repeating the steps is disclosed.

  Further, in Patent Document 2 (Japanese Patent No. 4170896), first, a display medium is arranged in all cells, and a lid is formed with a resin only in a desired cell, and the display medium is placed in the cell. After sealing, a method of disposing a desired display medium at a desired location by removing the display medium from another cell and disposing another display medium in the other cell is disclosed.

Japanese Patent No. 4797282 Japanese Patent No. 4170896

  The present inventor has obtained the following knowledge while intensively researching a method for arranging a desired display medium at a desired location.

  When the display medium is patterned and disposed at a desired position, it is necessary to form the display medium with a special material in order to make the display medium suitable for patterning. For this reason, it is difficult to form a display medium having desired display characteristics.

  In addition, when a display medium is placed in a cell and then the display medium is removed and another display medium is placed, if the previously placed display medium cannot be completely removed from the cell, the display medium is placed first. Such a display medium may become an impurity for a display medium disposed later, and display characteristics of the display medium disposed later may be impaired.

  The present invention has been made based on such circumstances, and the object thereof is a plurality of types of display in which combinations of colors and color tones that can be displayed without impairing the display quality of the reflective display device are different. It is an object of the present invention to provide a reflective display device in which media are arranged at desired locations.

  In the present invention, a display medium including an electroresponsive material is sealed between opposing substrates, at least one of which has a light-transmitting property and each of which is provided with an electrode, and a predetermined electric field is applied between the substrates. A reflective display device that displays a desired display when the first display area is disposed between a substrate on one side and a substrate on the other side in the first display region used for the desired display. And a second display medium disposed between the one side substrate and the other side substrate in the second display area used for the desired display, and the other The side substrate includes at least a first other substrate piece disposed to face the first display medium, and a second other substrate piece disposed to face the second display medium. The first display medium includes a first electrically responsive material, and the second display medium includes the second display medium. The display medium includes a second electrically responsive material, and the color or tone of the first electrically responsive material is different from the color or tone of the second electrically responsive material. It is a reflection type display device.

  According to the present invention, the substrate on the other side includes a plurality of substrate pieces. Therefore, it is easy to realize a reflective display device in which a plurality of different types of display media are arranged in desired regions corresponding to the respective substrate pieces without being mixed with each other. As a result, it is easy to realize a reflective display device in which a plurality of types of display media having different colors or color combinations that can be displayed without impairing the display characteristics of the display medium are respectively arranged at desired locations. .

  Preferably, a partition partitioning a plurality of cells is formed between the substrate on the one side and the substrate on the other side, and the first display medium and the second display medium are in each cell. Is arranged. In this case, it is possible to prevent a display defect, in particular, a decrease in contrast due to sedimentation or uneven distribution of particles or powder.

  Preferably, the first other substrate piece and the second other substrate piece are arranged adjacent to each other, and the first other substrate piece and the second other substrate piece are arranged. Adjacent edges are disposed on the top surface of the partition wall. In this case, the adjacent edge portions of the first other-side substrate piece and the second other-side substrate piece do not have a cell in which the outside and the inside communicate with each other in the region in the vicinity of the edge portion. The adhesive layer is adhered along the top surface of the partition wall. Accordingly, the first display medium disposed between the one-side substrate and the first other-side substrate piece in the first display region, and the one-side substrate and the second other-side substrate in the second display region. Moisture enters the second display medium disposed between the two pieces through the gap between the first other-side substrate piece and the second other-side substrate piece, and the display quality deteriorates. Is prevented.

  Preferably, in the partition region located below the edge portion, the width of the top surface of the partition on the other substrate side is larger than the partition region other than the region. In this case, it is easy to arrange the adjacent edge portions of the first other-side substrate piece and the second other-side substrate piece on the top surface of the partition wall.

  Preferably, a first sealing material is disposed between the one side substrate and the first other side substrate piece so as to surround the first display region, and the one side substrate. And the second other side substrate piece, a second sealing material is disposed so as to surround the second display area. In this case, the space between the one side substrate and the first other side substrate piece is sealed in the first display region, and the one side substrate and the second other side in the second display region. The space between the substrate pieces is sealed. For this reason, it is suppressed that display quality deteriorates because air or moisture enters the display medium arranged in the first display area and the second display area from the outside.

  Preferably, the first other substrate piece and the second other substrate piece are arranged adjacent to each other, and the first other substrate piece and the second other substrate piece are arranged. Moisture-proof so as to cover a gap between adjacent edges of the first other-side substrate piece and the second other-side substrate piece on the side opposite to the side facing the one-side substrate A film is provided. In this case, moisture enters the display medium disposed in the first display area and the second display area from the outside through the gap between the first other substrate piece and the second other substrate piece. It is prevented that the display quality is deteriorated. It is also possible to supplement the moisture resistance of the first other side substrate piece and the second other side substrate piece itself.

  Preferably, the first other substrate piece and the second other substrate piece are arranged adjacent to each other, and the first other substrate piece and the second other substrate piece are arranged. A plugging material is disposed between adjacent edges. Also in this case, air and moisture are externally applied to the display medium disposed in the first display area and the second display area through the gap between the first other substrate piece and the second other substrate piece. It is prevented that the display quality deteriorates due to intrusion.

  Preferably, the first other substrate piece and the second other substrate piece are electrically connected. In this case, a common extraction electrode can be used as an extraction electrode for the electrodes formed on the first other-side substrate piece and the second other-side substrate piece.

  Alternatively, according to the present invention, a display medium including an electrically responsive material is sealed between opposing substrates, at least one of which has a light-transmitting property and each has electrodes, and a predetermined electric field is interposed between the substrates. A method of manufacturing a reflective display device that displays a desired display when a barrier rib is applied, the partition wall forming step for forming a partition wall that partitions a plurality of cells on a substrate on one side, and a top surface of the partition wall Alternatively, an adhesive layer forming step of forming an adhesive layer on the substrate on the other side, and the display medium is disposed on the substrate on the one side, and the top of the partition is sealed so that the display medium is sealed in each cell. A display medium sealing step of bonding a surface and the other substrate through the adhesive layer, wherein the other substrate faces at least a first region of the one substrate. The first other side substrate piece to be disposed and the second region of the one side substrate are opposed to each other. And the display medium sealing step includes the one side substrate so as to cover the cells formed in the second region of the one side substrate. A cover member disposing step of disposing a cover member on the substrate, a first display medium disposing step of disposing a first display medium in the first region of the substrate on the one side where the cover member is disposed, and the first The top surface of the partition wall in the first region and the first other-side substrate piece are bonded together so that the display medium is sealed in each cell of the first region of the substrate on the one side. A cover member removing step for removing the cover member from the substrate on the one side, the cover member removing step being performed after the first other side substrate piece adhering step, which is bonded through a layer, and the cover A second display medium is formed in the second region of the substrate on one side, which is performed after the member removing step. And a top surface of the partition wall in the second region so that the second display medium is sealed in each cell of the second region of the substrate on the one side. And a second other-side substrate piece adhering step for adhering the second other-side substrate piece via the adhesive layer.

  According to the present invention, when the first display medium is disposed in the cell of the first region, the cell of the second region is covered with the cover member. Therefore, the first display medium is prevented from being arranged in the cells in the second area, and the first display medium is mixed into the second display medium arranged in the cells in the second area. It is also prevented from happening. In addition, since the first and second display media can be arranged without patterning, it is not necessary to form the first and second display media with a material suitable for patterning, and desired display characteristics can be obtained. It is easy to form the first and second display media having. As a result, it is easy to manufacture a reflective display device in which a plurality of types of display media with different displayable colors or combinations of colors are arranged at desired locations without impairing the display characteristics of the display medium.

  Preferably, the display medium sealing step is performed before the first other-side substrate piece adhering step, and is on the first other-side substrate piece, and the first region of the one-side substrate is formed on the first-side substrate piece. It is carried out before the first sealing material placement step of placing the first sealing material at a position where it can be surrounded and the second other side substrate piece bonding step, and on the second other side substrate piece, And a second sealing material disposing step of disposing a second sealing material at a position that can surround the second region of the substrate on the one side. In this case, in the first other-side substrate piece bonding step, the space on the first region between the one-side substrate and the first other-side substrate piece is sealed, and the second other-side substrate piece bonding step. , The space on the second region between the one side substrate and the second other side substrate piece is sealed. For this reason, it is suppressed that display quality deteriorates because air or moisture enters from the outside into the cells formed in the first region and the second region.

  Preferably, in the display medium sealing step, the first other-side substrate piece and the second other-side substrate piece are arranged adjacent to each other, and the manufacturing method of the reflective display device includes the display The first other-side substrate on the side opposite to the side facing the one-side substrate of the first other-side substrate piece and the second other-side substrate piece, which is performed after the medium sealing step. A moisture-proof film disposing step of providing a moisture-proof film is further provided so as to cover a gap between adjacent edges of the piece and the second other-side substrate piece. In this case, moisture enters from the outside into the cells formed in the first region and the second region through the gap between the adjacent edges of the first other substrate piece and the second other substrate piece. It is prevented that the display quality deteriorates due to intrusion. It is also possible to supplement the moisture resistance of the first other side substrate piece and the second other side substrate piece itself.

  Preferably, in the display medium sealing step, the first other-side substrate piece and the second other-side substrate piece are arranged adjacent to each other, and the manufacturing method of the reflective display device includes the display A packing material arranging step is further performed, which is performed after the medium sealing step and arranges a packing material between adjacent edges of the first other side substrate piece and the second other side substrate piece. ing. In this case as well, air is externally introduced into the cells formed in the first region and the second region through the gap between the adjacent edges of the first other substrate piece and the second other substrate piece. It is possible to prevent display quality from being deteriorated due to intrusion of water or moisture.

  Preferably, the manufacturing method of the reflective display device is performed after the display medium sealing step, and electrically connects the first other side substrate piece and the second other side substrate piece. The method further includes a conductive member arranging step of arranging the member. In this case, a common extraction electrode can be used as an extraction electrode for the electrodes formed on the first other-side substrate piece and the second other-side substrate piece.

  According to the present invention, the substrate on the other side includes a plurality of substrate pieces. Therefore, it is easy to realize a reflective display device in which a plurality of different types of display media are arranged in desired regions corresponding to the respective substrate pieces without being mixed with each other. As a result, it is easy to realize a reflective display device in which a plurality of types of display media having different colors or color combinations that can be displayed without impairing the display characteristics of the display medium are respectively arranged at desired locations. .

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 according to the embodiment of the present invention. 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 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 first display medium sealing step. FIG. 7 is a diagram schematically showing an example of the second display medium sealing step.

  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 the present embodiment, display media 131 and 132 containing an electrically responsive material are sealed between the opposing substrates 11 and 16 on which at least one of them has a light-transmitting property and electrodes are respectively formed. Thus, a desired display is performed when a predetermined electric field is applied between the substrates 11 and 16. Here, in the specification and claims of the present application, “translucent” means a property of transmitting light. In this embodiment mode, the substrate disposed on the viewing side has a light-transmitting property such that the total light transmittance is 50% or more, preferably 80% or more, and more preferably 90% or more.

  1 to 7, the other substrate 16 includes a plurality of other substrate pieces 161 and 162, and electrodes are disposed on the surfaces of the one substrate 11 and the other substrate pieces 161 and 162. Although provided, the illustration of the electrodes is omitted. In the present embodiment, the substrate 11 on one side is arranged on the viewing side, and the substrate 16 on the other side is arranged on the non-viewing side. But the other side board | substrate 16 containing the several other side board | substrate piece 161,162 may be arrange | positioned at the visual recognition side.

  As the substrate 11 on one side arranged on the viewing side, a translucent film such as polyethylene (PE), polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene naphthalate (PEN), or translucent glass is used. A material having a translucent electrode (translucent electrode) such as indium tin oxide (ITO), zinc oxide (ZnO), or tin oxide (SnO) may be typically used.

  The translucent electrode can be formed by a coating method, sputtering, a vacuum deposition method, a CVD 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 translucent electrode is formed so as to cover at least the display area of the substrate 11 on one side. Here, the display area refers to an area used for desired display in the reflective display device. In the present embodiment, the reflective display device has a first display area and a second display area, and the substrate 11 on one side is a first area 111 corresponding to the first display area. And a second area 112 corresponding to the second display area. As the number of display areas of the reflective display device, an arbitrary number can be adopted, and a number of 3 or more can also be adopted.

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

  The substrate 11 on one side can be applied in either a roll shape or a sheet shape.

  In the present embodiment, the other substrate 16 includes a first other substrate piece 161 disposed opposite to the first region 111 of the one substrate 11, and a second of the one substrate 11. And the second other-side substrate piece 162 disposed to face the region 112. However, as the number of other-side substrate pieces included in the other-side substrate 16, an arbitrary number can be adopted corresponding to the number of display areas of the reflective display device, and a number of 3 or more can also be adopted. is there. In the reflective display device of the present embodiment, the first other-side substrate piece 161 and the second other-side substrate piece 162 are arranged adjacent to each other.

  The shape and size of the first other-side substrate piece 161 and the shape and size of the second other-side substrate piece 162 do not interfere with each other, and the first region 111 and the second region of the one-side substrate 11 respectively. It is determined so that the area 112 can be covered. Further, in the present embodiment, of the edges of the first other-side substrate piece 161 and the second other-side substrate piece 162, the edges 161e and 162e arranged adjacent to each other are the tops of the partition walls 12. It is determined so that it can arrange | position along the said top surface on a surface. That is, the shape of the edge portions 161e and 162e is a linear shape along the lattice pattern when the pattern of the partition walls 12 is a lattice shape, and when the pattern of the partition walls 12 is a honeycomb shape, It is a shape with unevenness along the honeycomb pattern. Here, the 162 “edge portion” of the first other-side substrate piece 161 and the second other-side substrate piece 161 means a peripheral portion of the first other-side substrate piece 161 and the second other-side substrate piece 162. .

  As the first other side substrate piece 161 and the second other side substrate piece 162 arranged on the non-viewing side, a surface on the display medium side of a base material such as a resin film, a resin plate, glass, epoxy glass (glass epoxy), etc. Further, an electrode (counter electrode) formed of a conductive material such as metal can be used. Moreover, the 1st other side board piece 161 and the 2nd other side board piece 162 may use the base material which has translucency. 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 first other-side substrate piece 161 and the second other-side substrate piece 162 are arranged on the non-viewing side, there is no necessity of having translucency. However, when the same physical properties as the one-side substrate 11 such as thermal expansion characteristics are required, a light-transmitting member similar to the one-side substrate 11 can be used.

  Similarly to the thickness of the substrate 11 on one side, the thickness of the first other substrate piece 161 and the second other substrate piece 162 is preferably 10 μm to 1 mm. If it is thinner than 10 μm, the strength as a panel cannot be obtained and the risk of breakage increases. On the other hand, if it is thicker than 1 mm, the panel weight becomes too heavy and the handling becomes inconvenient and the cost also increases. Because. A suitable thickness range that is difficult to break and easy to handle is about 50 μm to 300 μm.

  As the counter electrode, a pattern electrode is used in the segment drive and passive matrix drive, and a pixel electrode in which a TFT (Thin Film Transistor) is arranged in the active matrix drive. However, the counter electrode may be provided on the substrate 11 on one side, and the translucent electrode may be provided on the first other-side substrate piece 161 and the second other-side substrate piece 162.

  The first other-side substrate piece 161 and the second other-side substrate piece 162 can be applied in either a roll shape or a sheet shape.

<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, partition walls 12 are first formed on the upper surface of one substrate 11 generally placed in the horizontal direction by, for example, photolithography (exposure by ultraviolet (UV) irradiation → development → firing). Is done. The partition wall 12 is a member that defines a plurality of cells to be described later.

  Here, in the present specification and claims, the “cell” refers to the upper and lower electrode substrates 11 in order to prevent a display defect, in particular, a decrease in contrast due to sedimentation or uneven distribution of particles or powder. , 16, 16 is a minute migration space of particles or powder to be electrophoresed, that is, a movement space, divided by a partition wall 12 formed between them. But the said movement space may be divided | segmented by other structures, such as a microcapsule. When there is a low risk of sedimentation or uneven distribution of the electrically responsive material, the partition wall 12 may be formed so as to surround the first region 111 and the second region 112, respectively. The second region 112 may not be formed so as to be divided into a plurality of regions. Further, in the case where a display medium that has been hardened into a sheet is disposed between the upper and lower electrode substrates 11 and 16, the partition 12 need not be formed.

  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 it to the substrate 11 on one side may be employed.

  The pattern of the partition walls 12 is basically arbitrary such as a circle, a lattice, a honeycomb shape (hexagon), and other polygons. The cell 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. In the present embodiment, the aperture ratio is preferably in the range of 80% to 98% from the viewpoint of contrast and the strength of the partition 12.

  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 thickness of the panel is too large 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, but is 0.05 mm to 1 mm pitch, preferably 0.1 mm to 0.5 mm pitch. Here, “pitch” means a distance required to move adjacent unit patterns to overlap each other.

  The width of the top surface of the partition wall 12 is preferably 9 μm or more. 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.

  The width of the top surface of the partition wall 12 is 50 μm or less, preferably 20 μm or less in the first region 111 and the second region 112. 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.

  On the other hand, the width of the top surface of the partition wall 12 is such that in the third region 113 between the first region 111 and the second region 112, the third region is a desired display of the reflective display device. Therefore, it may be 50 μm or more. However, in order to secure a sufficient display area, the width of the top surface of the partition wall 12 in the third area 113 is preferably 5 mm or less, more preferably 1 mm or less.

  In the present embodiment, the partition wall 12 is formed in the third region 113 such that the width of the top surface of the partition wall 12 is larger than that of the first region 111 and the second region 112. In the third region 113, adjacent edges 161e and 162e of the first and second other-side substrate pieces 161 and 162 are disposed on the partition wall 12 as will be described later. Therefore, in the reflective display device of the present embodiment, as shown in FIG. 1, the edges 161e and 162e of the edge portions 161e and 162e are viewed from the other substrate 16 side toward the one substrate 11 side. In the region of the partition wall 12 positioned below, the width of the top surface on the substrate 16 side on the other side of the partition wall 12 is larger than the regions 161c and 162c of the partition wall 12 other than the region.

  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, the substrate 11 on one side on which the partition wall 12 was formed was embedded in a curable resin, and the cross section of the partition wall 12 was observed with a microtome (manufactured by Daiwa Koki Kogyo Co., Ltd .: FX-801). Each width can be measured based on the image cut out and imaged with a scanning electron microscope (SEM).

  In order for the width of the top surface of the partition wall 12 in the third region 113 to be larger than the width of the top surface of the partition wall 12 in the first region 111 and the second region 112, the partition wall 12 In the region 113, the partition wall 12 may be formed to have a larger width as shown in FIG. 2 than in the first region 111 and the second region 112, or FIG. As shown in (d), the top surface of the partition wall 12 may be enlarged.

  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, for example, a polyester-based thermoplastic adhesive having a thickness of 20 μm on a PET film as a substrate 21. A transfer sheet 20 on which an adhesive 221 is formed is prepared. Next, the transfer sheet 20 is disposed to face the substrate 11 on one side so that the surface of the adhesive 221 is disposed on the top surface of the partition wall 12 of the substrate 11 on the one side. In this state, the substrate 11 on one side and the transfer sheet 20 are laminated at a normal temperature and a pressure of 1 kPa. After lamination, 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. However, the adhesive layer 22 may be formed on the first other side substrate piece 161 and the second other side substrate piece 162 on the counter electrode side.

  As the adhesive 221 for forming the adhesive layer 22, an adhesive using a thermoplastic material is preferable. It has a property of softening by heating and solidifying when cooled, and is plastic when repeated cooling and heating. Is a material that is reversibly maintained.

  When the adhesive 221 made of a thermoplastic material is used as the adhesive layer 22, the adhesive 221 solidified on the transfer sheet substrate 21 is softened by heating to a temperature exceeding the softening temperature, The adhesive 221 can be reliably thermally transferred only to the top surface of the partition wall. Further, since the adhesive 221 after thermal transfer is cooled to room temperature and solidified again, tackiness, i.e., stickiness, is eliminated. Further, since there is no tack, that is, stickiness, the display media 131 and 132 filled in the cells are not bonded to the adhesive 221. Then, the adhesive 221 on the top surface of the partition wall is heated again 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 substrate 16 on the other side. . Since the adhesive 221 after being bonded to the substrate 16 on the other side is not tacky, that is, sticky again at room temperature, the display media 131 and 132 are not bonded to the adhesive 221 again, and the display quality is improved. There is no risk of decline.

  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 improve the adhesion between the partition wall 12 and the adhesive 221, the partition wall 12 may be subjected to a 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 adhesive 221.

  Next, the display medium is disposed on the substrate 11 on one side, and the top surface of the partition wall 12 and the substrate 16 on the other side are interposed through the adhesive layer 22 so that the display media 131 and 132 are sealed in each cell. (Display medium sealing step: step (3) and step (4) in FIG. 2).

  As the display media 131 and 132, ink 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 is a so-called electrophoretic material in which colored particles such as white, black, and color move in response to an electric field, or a so-called twist ball. Materials, i.e., particles that can be rotated by an electric field and each particle has a color or tone different from each other on one side and the other side, or a nanoparticle material that moves by an electric field, etc. . 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. Here, in the specification and claims of the present application, “color tone” means “color strength and tone”.

  In the present embodiment, as the display medium, the first display medium 131 including the first electric responsive material and the second electric responsive material having a color different from the color of the first electric responsive material are used. Including a second display medium 132. For example, the first display medium 131 includes a white electrically responsive material and a black electrically responsive material, and the second display medium 132 includes a white electrically responsive material and a red electrically responsive material. Including. However, the first display medium 131 and the second display medium 132 may not include a common color (white) electroresponsive material. For example, the first display medium 131 includes a blue electrical responsive material and a black electrical responsive material, whereas the second display medium 132 includes a green electrical responsive material and a red electrical responsive material. May contain a sex material.

  In addition, the display medium includes a first display medium 131 including a first electrical responsive material and a second electrical responsive material including a second electrical responsive material having a color tone different from the color tone of the first electrical responsive material. Display medium 132 may be used. For example, the first display medium 131 includes a white electrical responsive material and a black electrical responsive material, whereas the second display medium 132 includes a white electrical responsive material and a gray electrical responsive material. May contain a sex material.

  Further, in the display medium sealing step, as shown in FIG. 2, the first display medium 131 is sealed in each cell of the first region 111 of the substrate 11 on one side (first display medium sealing). Step: Step (3) in FIG. 2 and the step of sealing the second display medium 132 in each cell of the second region 112 of the substrate 11 on one side (second display medium sealing step: FIG. 2). (4)).

  FIG. 6 is a diagram schematically showing an example of the first display medium sealing step according to the present embodiment. First, the cover member 71 is disposed on the one substrate 11 so as to cover the cells formed in the second region 112 of the one substrate 11 (cover member disposing step). Specifically, the cover member 71 is disposed on the adhesive layer 22 formed on the partition wall 12 so as to cover the cells formed in the second region 112 of the substrate 11 on one side, and in this state, The substrate 11 on the side and the cover member 71 are laminated at a pressure of 1 kPa at 20 to 120 ° C. Thereby, the cells located in the second region 112 of the substrate 11 on one side are sealed by the cover member 71. As the cover member 71, for example, a PET film can be employed. At least the surface of the cover member 71 facing the adhesive layer 22 is subjected to a mold release process so that the transfer of the adhesive layer 22 on the partition wall 12 to the cover member 71 is suppressed. It is preferable.

  Although the thickness of the cover member 71 can be determined as appropriate, in the present embodiment, the thickness is 4 to 300 μm. If the thickness of the cover member 71 is sufficiently large, for example, 100 μm or more, the adhesive layer 22 formed on the partition wall 12 in the first region 111 when the cover member 71 is laminated on the adhesive layer 22. This prevents the adhesive 221 from adhering to the laminator 91. Further, if the thickness of the cover member 71 is sufficiently small, for example, 10 μm or less, the first other side substrate piece 161 is placed on the partition wall 12 in the first region 111 in the first other side substrate piece bonding step described later. When laminating and laminating, it is suppressed that the cover member 71 is too thick and the movement of the laminator 91 is hindered by the cover member 71.

  Next, the cells formed in the second region 112 of the substrate 11 on one side are sealed by the cover member 71, but the cells formed in the first region 111 are open. The first display medium 131 is arranged in the first region 111 of the substrate 11 on the one side (first display medium arrangement step). The first display medium 131 is (1) dropped on the substrate 11 on one side from the dispenser, inkjet, or die coat, and (2) the surface in the first region 111 by the applicator, doctor blade, doctor knife, or central squeegee. It is applied so as to be uniform inside.

  Next, the first sealing material 61 is disposed on the first other-side substrate piece 161 at a position that can surround the first region 111 of the one-side substrate 11 (first sealing material). Placement process).

  If a specific description is supplemented about an example of the arrangement method of the first sealing material 61, an adhesive such as an ultraviolet curable resin is used as the first sealing material 61 with a line width of 0.5 mm using a dispenser. It is arranged by being applied linearly at a height of 50 μm. However, the first sealing material 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, if an ultraviolet curable resin is used as the first sealing material 61 and cured with ultraviolet rays, the resin and the first display medium 131 are mixed and the display performance of the display medium 131 deteriorates. There is no fear. The ultraviolet curable resin used for the first sealing material 61 is preferably a monomer or oligomer of urethane acrylate, polyester acrylate, or epoxy acrylate. For example, CN966, CN981, CN2003A, CN964, CN9873NS, manufactured by Sartomer, 3033, 3034, 3057, 3052, 3054, 3056B, 3170D manufactured by ThreeBond, LCB-610 manufactured by EACH Sea Co., Ltd., and the like are applicable. However, the first sealing material 61 can be constituted by a thermosetting resin, a room temperature curable resin, a heat seal resin or the like in addition to the ultraviolet curable resin.

  Furthermore, the first sealing material 61 preferably has adhesiveness. In this case, the posture of the one-side substrate 11 to the first other-side substrate piece 161 is difficult to be kept flat because the one-side substrate 11 to the first other-side substrate piece 161 is distorted. In the first other-side substrate piece bonding step, which will be described later, the first other-side substrate piece 161 is bonded to the one-side substrate 11 in a state where the first display medium 131 is arranged on the one-side substrate 11. In this case, no gap is formed between the first sealing material 61 and the one side substrate 11 or the first other side substrate piece 161, and the first sealing material 61 is disposed in the first region 111 of the one side substrate 11. The first display medium 131 does not move out of the area surrounded by the first sealing material 61. As a result, in the region surrounded by the first seal material 61, there is no possibility that display unevenness or generation of bubbles in the cell will occur. As the 1st sealing material 61 which has adhesiveness, what has functional groups, such as a hydroxyl group, an alkoxy group, a urethane group, an epoxy group which can react with base-material surfaces, such as a film and glass, is preferable.

  In the present embodiment, the first sealing material 61 is an adhesive containing an ultraviolet curable material such as an ultraviolet curable resin. In the present embodiment, the first sealing material 61 is disposed on the first other-side substrate piece 161, but is disposed on the one-side substrate 11 so as to surround the first region 111. Also good.

  Next, the first other-side substrate piece 161 is separated from the partition wall 12 of the first region 111 so that the first display medium 131 is sealed in each cell of the first region 111 of the one-side substrate 11. Arranged on the adhesive layer 22 formed thereon, the top surface of the partition wall 12 in the first region 111 and the first other substrate piece 161 are bonded via the adhesive layer 22 (first Other side substrate piece bonding step). In the first other-side substrate piece bonding step of the present embodiment, the adhesive 221 transferred as the adhesive layer 22 is heated to obtain an adhesive force. Specifically, while applying a predetermined thermocompression bonding pressure (laminating pressure) by the laminator 91, the adhesive 221 is heated from the periphery to a temperature exceeding the softening temperature to be softened, whereby the first region 111. The adhesive 221 on the partition wall 12 and the first other substrate piece 161 are bonded. However, other thermocompression bonding modes may be employed. In this way, the first other-side substrate piece 161 is arranged to face the first display medium 131.

  Next, the first sealing material 61 is cured by exposure to ultraviolet rays, and the surplus first display medium 131 on the one side substrate 11 is left with the cover member 71 being disposed on the one side substrate 11. Wiping off and removing (remaining first display medium removing step). The surplus first display medium 131 may be wiped off with a waste cloth or the like while the display medium 131 is in a liquid state, or the surplus first display medium 131 may be dried and its solid content (particles ) May be wiped off while remaining on the one-side substrate 11 and the first other-side substrate piece 161.

  However, the excess first display medium 131 may be removed by cleaning the substrate 11 on one side and the first other-side substrate piece 161 with a cleaning liquid. In this case, a cleaning liquid that does not dissolve the adhesive layer 22 is preferably used. For example, when the adhesive layer 22 is formed of a material that dissolves in an organic solvent, pure water can be employed. In addition, when the adhesive layer 22 is formed of a material that dissolves in a polar solvent, a nonpolar solvent can be employed. Further, the excessive first display medium 131 may be removed while being scraped off from the one-side substrate 11 and the first other-side substrate piece 161 using a sponge or brush. The cleaning may be performed by spraying the cleaning liquid onto the first other-side substrate piece 161 with a high-pressure nozzle.

  FIG. 7 is a diagram schematically showing an example of the second display medium sealing step according to the present embodiment. First, the cover member 71 disposed in the second region 112 of the substrate 11 on one side is peeled off (cover member removing step). In the present embodiment, cover member 71 is peeled off by hand.

  Next, the cover member 71 is removed, and the second display medium 132 is placed on the one-side substrate 11 in a state where the cells formed in the second region 112 of the one-side substrate 11 are opened. Second display medium arrangement step). Similarly to the first display medium 131, the second display medium 132 is dripped onto the substrate 11 on one side from (1) a dispenser, an inkjet, or a die coat, and (2) an applicator or a doctor blade, a doctor knife, a center The squeegee is applied so as to be in-plane uniform in the second region 112.

  Next, the second sealing material 62 is disposed on the second other-side substrate piece 162 at a position that can surround the second region 112 of the substrate 11 on the one side (second seal). Material placement process). In the present embodiment, the same sealing material as the first sealing material 61 is employed as the second sealing material 62. Similarly to the arrangement of the first sealing material 61, the second sealing material 62 is arranged by being applied linearly with a line width of 0.5 mm and a height of 50 μm using a dispenser.

  Next, the top surface of the partition 12 in the second region 112 and the second other substrate so that the second display medium 132 is sealed in each cell of the second region 112 of the substrate 11 on one side. The piece 162 is bonded via the adhesive layer 22 (second other side substrate piece bonding step). Also in the second other-side substrate piece bonding step of the present embodiment, the adhesive 221 transferred as the adhesive layer 22 is heated to obtain an adhesive force. Specifically, while applying a predetermined thermocompression bonding pressure (laminating pressure) by the laminator 91, the adhesive 221 is heated from the periphery to a temperature exceeding the softening temperature to soften the partition wall 12 and the second The other side substrate piece 162 is bonded. However, other thermocompression bonding modes may be employed. In this manner, the second other-side substrate piece 162 is disposed to face the second display medium 132.

  Next, the second sealing material 62 is cured by exposing to ultraviolet rays. Thereafter, the surplus second display medium 132 on the one-side substrate 11 is removed (surplus second display medium removing step). In the present embodiment, the surplus second display medium 132 is wiped off with a waste cloth or the like, similarly to the surplus first display medium 131.

  After the second display medium sealing step, a conductive paste is disposed as the conductive member 14 so that the first other substrate piece 161 and the second other substrate piece 162 are electrically connected. . The conductive paste is a metal paste such as a silver paste, for example, a predetermined position, for example, a first other side substrate piece 161 and a second other side substrate by a dispenser or inkjet, tampo printing, pad printing, or stacking printing. It is applied between the edge portions 161e and 162e of the piece 162 adjacent to each other.

Returning to FIG. 2, after the second display medium sealing step, on the side opposite to the side facing the substrate 11 on one side of the first other side substrate piece 161 and the second other side substrate piece 162. The moisture-proof film 19 is disposed so as to cover the gap between the adjacent edge portions 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162 (moisture-proof film arranging step: FIG. Step 2 (5)). Here, the “moisture-proof film” is a film having a moisture-proof property, and “moisture-proof” in the specification and claims of the present application means a property that prevents moisture permeation. The moisture-proof film 19 preferably has a water vapor transmission rate at 40 ° C. and 90% RH of 0.1 g / m ² / day or less, and more preferably 0.001 g / m ² / day or less.

  In the present embodiment, the moisture-proof film 19 is arranged so as to cover the entire first second substrate piece 161 and the second second substrate piece 162. But the moisture-proof film 19 may be arrange | positioned also on the board | substrate 11 of the one side. By disposing the moisture-proof film 19 as described above, the first other-side substrate piece 161 and the second other-side substrate piece 162 enter the display panel from the outside through a gap between the adjacent edge portions 161e and 162e. Intrusion of moisture is prevented. Furthermore, the moisture resistance of the first other-side substrate piece 161 and the second other-side substrate piece 162 constituting the other-side substrate 16 can be improved. Moreover, when the moisture-proof film 19 is arrange | positioned on the board | substrate 11 of the one side, the moisture-proof property of the board | substrate 11 of 1 side itself can also be improved.

The moisture-proof film 19 needs to have translucency when the moisture-proof film 19 is disposed on the viewing side. In this case, as the moisture-proof film 19, for example, a film prepared by vapor-depositing a silicon oxide such as SiO _x on a translucent base film can be employed. On the other hand, when the moisture-proof film 19 is disposed on the side opposite to the viewing side, the moisture-proof film 19 may not have translucency. Therefore, in this case, as the moisture-proof film 19, a substrate film formed with a metal film such as copper or aluminum can be employed.

  In the present embodiment, first, the adhesive 222 is uniformly applied on the surface of the first other-side substrate piece 161 and the second other-side substrate piece 162 on the side where the moisture-proof film 19 is disposed. The Thereafter, the moisture-proof film 19 is bonded to the adhesive 222.

  Note that as the adhesive 222, an adhesive similar to the adhesive 221 can be employed. Moreover, the sealing material similar to the sealing materials 61 and 62 is also employable. When a sealing material similar to the sealing materials 61 and 62 is employed as the adhesive 222, a film having no moisture resistance as described above may be disposed instead of the moisture-proof film 19.

  Further, before the moisture-proof film 19 is disposed, the filling material may be disposed between the adjacent edge portions 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162. . By disposing the filling material between the edge portions 161e and 162e, entry of air and moisture from the outside into the display panel is prevented through the gap between the edge portions 161e and 162e. As the filling material, an adhesive similar to the adhesive 221 can be used. Moreover, the sealing material similar to the sealing materials 61 and 62 is also employable. In the present embodiment, the adhesive 222 for adhering the moisture-proof film 19 is also disposed between the edges 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162, and is packed. Plays the role of wood.

  Further, an antireflection film or a hard code film may be provided on the viewing side substrate. The function of the antireflection film is to prevent the reflection of the light source. The function of the hard coat film is to prevent the surface of the display panel from being scratched.

  Thereafter, an outer periphery sealing process is performed to complete the manufacture of a desired reflective display device.

  As described above, according to the manufacturing method of the reflective display device of the present embodiment, when the first display medium 131 is arranged in the cell of the first region 111, the cell of the second region 112 is covered. Covered with a member 71. Therefore, the first display medium 131 is prevented from being arranged in the cell of the second region 112, and the first display medium is added to the second display medium 132 arranged in the cell of the second region 112. It is also possible to prevent 131 from being mixed. Further, since the first and second display media 131 and 132 can be arranged without patterning, it is necessary to form the first and second display media 131 and 132 with a material suitable for patterning. It is easy to form the first and second display media 131 and 132 having desired display characteristics. As a result, it is easy to manufacture a reflective display device in which a plurality of types of display media with different displayable colors or combinations of colors are arranged at desired locations without impairing the display characteristics of the display medium.

  The display medium sealing step is performed before the first other-side substrate piece bonding step, and surrounds the first region 111 of the one-side substrate 11 on the first other-side substrate piece 161. Is performed before the first sealing material arrangement step of arranging the first sealing material 61 at a position where the first sealing material 61 can be placed and the second other side substrate piece bonding step, and on the second other side substrate piece 162, And a second sealing material arranging step of arranging the second sealing material 62 at a position where the second region 112 of the substrate 11 on the one side can be surrounded. Thereby, in the first other-side substrate piece bonding step, the space on the first region 111 between the one-side substrate 11 and the first other-side substrate piece 161 is sealed, and the second other-side substrate is sealed. In the single bonding step, the space on the second region 112 between the substrate 11 on one side and the second substrate piece 162 on the second side is sealed. As a result, it is possible to prevent the display quality from being deteriorated due to the entry of air or moisture from the outside into the cells formed in the first region 111 and the second region 112.

  The first other side substrate piece 161 and the second other side substrate piece 162 are arranged adjacent to each other, and the manufacturing method of the reflective display device is performed after the display medium sealing step, On the side opposite to the side facing the substrate 11 on one side of the first other side substrate piece 161 and the second other side substrate piece 162, the first other side substrate piece 161 and the second other side substrate piece A moisture-proof film disposing step of providing a moisture-proof film 19 is further provided so as to cover a gap between the adjacent edges 161e and 162e of 162. Thereby, in the cells formed in the first region and the second region, the gap between the adjacent edge portions 161e and 162e of the first other side substrate piece 161 and the second other side substrate piece 162. Through this, it is possible to prevent display quality from deteriorating due to moisture entering from the outside. It is also possible to supplement the moisture resistance of the first other-side substrate piece 161 and the second other-side substrate piece 162 itself.

  In addition, the manufacturing method of the reflective display device is performed after the display medium sealing step, and between the adjacent edge portions 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162. In addition, a third sealing material arranging step of arranging the filling material 222 is further provided. Thereby, in the cells formed in the first region and the second region, the gap between the adjacent edge portions 161e and 162e of the first other side substrate piece 161 and the second other side substrate piece 162. Thus, it is possible to prevent display quality from being deteriorated due to air or moisture entering from outside.

  In addition, the reflective display device manufacturing method is performed after the display medium sealing step, and the conductive member 14 that electrically connects the first other-side substrate piece 161 and the second other-side substrate piece 162 is provided. The electroconductive member arrangement | positioning process to arrange | position is further provided. As a result, a common extraction electrode can be used as the extraction electrode of the electrodes formed on the first other-side substrate piece 161 and the second other-side substrate piece 162.

  Alternatively, according to the reflective display device of the present embodiment, the partition wall 12 that partitions a plurality of cells is formed between the substrate 11 on one side and the substrate 16 on the other side, and the first display medium 131 and the second display medium 132 are arranged in each cell. For this reason, it is possible to prevent a display defect, in particular, a decrease in contrast due to sedimentation or uneven distribution of particles and powder in the display media 131 and 132.

  Further, the first other side substrate piece 161 and the second other side substrate piece 162 are arranged adjacent to each other, and the first other side substrate piece 161 and the second other side substrate piece 162 are mutually adjacent. Adjacent edges 161 e and 162 e are arranged on the top surface of the partition wall 12. For this reason, the adjacent edge portions 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162 have cells in which the outside and the inside communicate with each other in a region near the edge portion. In order to prevent this, the adhesive layer 22 is adhered along the top surface of the partition wall 12. Therefore, in the first display area 111, the first display medium 131 disposed between the one substrate 11 and the first other substrate piece 161 and the one display substrate 11 in the second display area 112. Moisture from the outside through the gap between the first other side substrate piece 161 and the second other side substrate piece 162 to the second display medium 132 arranged between the second side substrate piece 162 and the second other side substrate piece 162. Can prevent display quality from degrading.

  Further, in the region of the partition wall 12 positioned below the edge portions 161e and 162e, the width of the top surface on the substrate 16 side on the other side of the partition wall 12 is larger than the regions 161c and 162c of the partition wall 12 other than the region. . For this reason, it is easy to arrange the adjacent edges 161 e and 162 e of the first other-side substrate piece 161 and the second other-side substrate piece 162 on the top surface of the partition wall 12.

  Next, practical examples actually performed will be described.

<Example of Reflective Display Device>
As a substrate 11 on one side, an indium tin oxide (ITO) vapor-deposited film (thickness 0.2 μm) is formed as a translucent electrode on one surface of a PET film (Toyobo A4100) having a size of 150 mm × 150 mm × thickness 0.125 mm. A provided substrate was prepared. The translucent electrode is formed by a general film forming method such as sputtering, vacuum evaporation, or CVD, and in addition to indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), etc. Can be formed.

Next, a negative photosensitive resin material (a dry film resist manufactured by DuPont MRC Dry Film Resist Co., Ltd.) is laminated to a thickness of 20 μm on the substrate 11 on one side, and heated at 100 ° C. for 1 minute. Then, exposure is performed using an exposure mask (exposure amount: 500 mJ / cm ² ), and thereafter development using a 1% KOH aqueous solution is performed for 30 seconds, followed by baking at 200 ° C. for 60 minutes, thereby obtaining a square lattice. A partition wall 12 having a shape pattern was formed. The partition wall 12 has a width of 20 μm in the first region 111 and the second region 112 of the substrate 11 on one side, and 200 in the third region 113 between the first region 111 and the second region 112. It was formed to be μm.

  A polyethylene terephthalate (PET) film 21 (manufactured by Teijin DuPont) having a thickness of 50 μm is used as the transfer film substrate 21, and a heat sealant 221 (Byron 630 manufactured by Toyobo Co., Ltd.) having a thickness of 20 μm is formed by a die coder. Applied and 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, the substrate 11 on one side is placed on the transfer film 20 with the surface on which the partition wall 12 is formed facing down, and in this state, it is laminated at room temperature with a pressing force of about 1 kPa. It was. Thereafter, the periphery of the heat sealant 221 was heated to a temperature exceeding its softening temperature, for example, about 130 ° C., and the substrate 11 on one side was peeled from the transfer film 20 in this state. 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 12 to the top of the heat sealant 221 was about 6 μm.

  Next, as the first other side substrate piece 161 and the second other side substrate piece 162 constituting the other side substrate 16, respectively, on a PET film (A4100 made by Toyobo Co., Ltd.) of 75 mm × 150 mm × thickness 0.125 mm, An electrode formed with a counter electrode, which is an ITO electrode corresponding to a drive electrode of a 2-inch panel, was used.

  Further, as the cover member 71, a PET film having a surface of 75 mm × 150 mm × thickness 200.02 mm subjected to a release treatment for the heat sealant 221 was used.

  Subsequently, the cover member 71 is disposed on the adhesive layer 22 formed on the partition wall 12 in the second region 112 of the substrate 11 on the one side, and the substrate 11 on the one side and the cover member 71 are mutually connected by the laminator 91. The cover member 71 was bonded to the adhesive layer 22 by being pressed.

Next, ink having the following components was prepared as the first display medium 131 and the second display medium 132.
<Ink component>
・ Electrophoretic particles: 60 parts by weight ・ Dispersion: 40 parts by weight

  The first display medium 131 contained white electrophoretic particles and black electrophoretic particles at a weight ratio of about 1: 1. The second display medium 132 contained white electrophoretic particles and green electrophoretic particles in a weight ratio of about 1: 1.

  First, the first display medium 131 is dropped from the dispenser onto the first region 111 of the substrate 11 on the one side, and is applied with an applicator (manufactured by Tester Sangyo) at a gap of 50 μm from the surface of the substrate 11 on the one side. The first display medium 131 was applied. The coating was performed at a position of 75 mm × 150 mm based on the center of the first region 111 of the substrate 11 on one side, and the film thickness was 35 μm.

  Next, an ultraviolet curable resin (e-etch) serving as the first sealing material 61 is placed on the first other-side substrate piece 161 at a position where the first region 111 of the one-side substrate 11 can be surrounded. -C Co., Ltd. product: LCB-610) was arrange | positioned seamlessly using the dispenser (not shown).

  Then, the first other-side substrate piece 161 was superposed on the first region 111 of the one-side substrate 11 in the atmosphere. At this time, the first other-side substrate piece 161 is positioned along the partition wall 12 on the partition wall 12 in the third region 113 of the substrate 11 on one side of one edge of the first other-side substrate piece 161. So that it was positioned. Then, while further applying a constant pressing force by the laminator 91, the adhesive layer 22 on the partition wall 12 of the first region 111 of the substrate 11 on the one side and the first layer so that the cell gap interval is 0.02 mm. The other substrate piece 161 was brought into close contact. At this time, the first other-side substrate piece 161 and the first-side substrate piece 161 and the first-side substrate piece 161 are curled so that no bubbles remain between the one-side substrate 11 and the first other-side substrate piece 161. The other first display medium 131 was pasted from one side of the other side substrate piece 161 toward the other side opposite to the other side substrate piece 161 while extruding the excess first display medium 131 exceeding the cell volume in the partition wall 12. As a result, only a specified amount of the first display medium 131 was filled in the cells of the first region 111 of the substrate 11 on one side.

Thereafter, after the first sealing material 61 is cured by exposing to ultraviolet rays (exposure amount 700 mJ / cm ² ), the excess first display medium 131 on the substrate 11 on one side remains in a liquid state, and the waste is removed. Used to wipe off.

  Next, the cover member 71 disposed on the substrate 11 on the one side was peeled off, and the second display medium 132 was disposed on the second region of the substrate 11 on the one side. Similarly to the first display medium 131, the second display medium 132 was dropped from the dispenser onto the second region 112 of the substrate 11 on one side and applied with an applicator. The coating was performed at a position of 75 mm × 150 mm based on the center of the second region 112 of the substrate 11 on one side, and the film thickness was 35 μm.

  Next, an ultraviolet curable resin (e.g., a second sealing material 62) is placed on the second other side substrate piece 162 at a position where the second region 112 of the one side substrate 11 can be surrounded. Etch Sea Co., Ltd. product: LCB-610) was placed without interruption using a dispenser (not shown).

  Then, the second other-side substrate piece 162 was superposed on the second region 112 of the one-side substrate 11 in the atmosphere. At this time, the second other-side substrate piece 162 is positioned along the partition wall 12 on the partition wall 12 in the third region 113 of the substrate 11 on one side with one side of the edge of the second other-side substrate piece 162. So that it was positioned. Then, while further applying a constant pressing force by the laminator 91, the adhesive layer 22 on the partition wall 12 in the second region 112 of the substrate 11 on the one side and the second layer so that the cell gap interval becomes 0.02 mm. The other substrate piece 162 was brought into close contact. At this time, the second other-side substrate piece 162 is curled and the one-side substrate 11 and the second-side substrate piece 162 are curled so that no bubbles remain between the one-side substrate 11 and the second other-side substrate piece 162. The two second substrate pieces 162 were bonded together while extruding the surplus second display medium 132 exceeding the cell volume in the partition wall 12 from one side to the opposite side. As a result, only a specified amount of the second display medium 132 was filled in the cells of the second region 112 of the substrate 11 on one side.

Thereafter, the second sealing material 62 is cured by exposing to ultraviolet rays (exposure amount: 700 mJ / cm ² ), and then the excess second display medium 132 on the substrate 11 on one side remains in a liquid state. Used to wipe off.

  Thereafter, a heat sealant 222 as a third sealing material is provided between the adjacent edge portions 161e and 162e of the first other-side substrate piece 161 and the second other-side substrate piece 162, and the edge portions 161e and 162e. Arranged to fill the space between. Further, the heat sealant 222 is uniformly applied on the side opposite to the side facing the substrate 11 on one side of the first other side substrate piece 161 and the second other side substrate piece 162, and the heat A moisture-proof film was adhered to the sealant 222.

Thereafter, an ultraviolet curable resin (LCB-610, manufactured by EACH Sea Co., Ltd.) is applied and sealed around both the substrates 11 and 16 using a dispenser (not shown) and exposed to ultraviolet rays ( An exposure amount of 700 mJ / cm ² ) was cured (peripheral sealing treatment). Through the above steps, a plurality of display panels were manufactured.

  The display quality of the display panel obtained as described above was evaluated, and both the display quality in the first display area and the display quality in the second display area were good. In addition, when the cells in the first region and the cells in the second region of the substrate 11 on one side are observed, the second display medium 132 is not observed in the cells in the first region, and the second display medium 132 is not observed. The first display medium 131 was not observed in the cell of the area.

11 Substrate on one side 12 Partition 131 First display medium 132 Second display medium 161 First other substrate piece 162 Second other substrate piece 20 Transfer sheet 21 PET film 22 Adhesive layer 221 Heat seal material 71 Cover Member 91 Laminator

Claims (13)

Desirable when a display medium containing an electro-responsive material is sealed between opposing substrates on which at least one of them has a light-transmitting property and electrodes are formed, and a predetermined electric field is applied between the substrates A reflective display device that displays
A first display medium disposed between a substrate on one side and a substrate on the other side in the first display region used for the desired display;
A second display medium disposed between the substrate on the one side and the substrate on the other side in the second display region used for the desired display;
With
The substrate on the other side includes at least a first other substrate piece disposed to face the first display medium and a second other substrate disposed to face the second display medium. A piece, and
The first display medium includes a first electrically responsive material;
The second display medium includes a second electrically responsive material;
A reflective display device, wherein the color or color tone of the first electrically responsive material is different from the color or color tone of the second electrically responsive material. Between the substrate on the one side and the substrate on the other side, a partition wall that partitions a plurality of cells is formed,
The reflective display device according to claim 1, wherein the first display medium and the second display medium are arranged in each cell. The first other substrate piece and the second other substrate piece are arranged adjacent to each other,
3. The reflective display according to claim 2, wherein adjacent edges of the first other-side substrate piece and the second other-side substrate piece are arranged on a top surface of the partition wall. apparatus. The width of the top surface of the other side of the partition wall is larger in the partition region located below the edge than in the partition region other than the region. A reflective display device according to 1. Between the one side substrate and the first other side substrate piece, a first sealing material is disposed so as to surround the first display region,
The second sealing material is disposed between the one side substrate and the second other side substrate piece so as to surround the second display region. 5. The reflective display device according to any one of 4. The first other substrate piece and the second other substrate piece are arranged adjacent to each other,
The first other-side substrate piece and the second other-side substrate piece on the side opposite to the side facing the one-side substrate of the first other-side substrate piece and the second other-side substrate piece. 6. The reflective display device according to claim 1, wherein a moisture-proof film is provided so as to cover a gap between adjacent edges of the substrate piece. The first other substrate piece and the second other substrate piece are arranged adjacent to each other,
The filling material is arrange | positioned between the mutually adjacent edge parts of the said 1st other side board piece and the said 2nd other side board piece, The Claim 1 thru | or 6 characterized by the above-mentioned. Reflective display device. The reflective display device according to claim 1, wherein the first other substrate piece and the second other substrate piece are electrically connected to each other. Desirable when a display medium containing an electro-responsive material is sealed between opposing substrates on which at least one of them has a light-transmitting property and electrodes are formed, and a predetermined electric field is applied between the substrates A method of manufacturing a reflective display device,
A partition wall forming step for forming a partition wall for partitioning a plurality of cells on a substrate on one side;
An adhesive layer forming step of forming an adhesive layer on the top surface of the partition wall or on the substrate on the other side;
Display in which the display medium is disposed on the substrate on the one side and the top surface of the partition and the substrate on the other side are bonded via the adhesive layer so that the display medium is sealed in each cell. A medium sealing step;
With
The substrate on the other side is disposed so as to face at least a first other-side substrate piece disposed opposite to the first region of the one-side substrate and a second region of the one-side substrate. A second other side substrate piece,
The display medium sealing step includes
A cover member disposing step of disposing a cover member on the one side substrate so as to cover the cells formed in the second region of the one side substrate;
A first display medium disposing step of disposing a first display medium in the first region of the one side substrate on which the cover member is disposed;
A top surface of the partition wall of the first region and the first other-side substrate piece so that the first display medium is sealed in each cell of the first region of the one-side substrate; A first other-side substrate piece adhering step for adhering through the adhesive layer,
A cover member removing step that is performed after the first other-side substrate piece bonding step and removes the cover member from the one-side substrate;
A second display medium disposing step that is performed after the cover member removing step and disposing a second display medium in the second region of the substrate on the one side;
The top surface of the partition wall of the second region and the second other-side substrate piece are sealed so that the second display medium is sealed in each cell of the second region of the one-side substrate. A second other-side substrate piece bonding step of bonding through the bonding layer;
A method of manufacturing a reflective display device, comprising: The display medium sealing step includes
It is performed before the first other-side substrate piece adhering step, and is located on the first other-side substrate piece so as to surround the first region of the one-side substrate. A first sealing material arranging step of arranging the sealing material;
It is carried out before the second other-side substrate piece adhering step, and is located on the second other-side substrate piece so as to surround the second region of the one-side substrate. A second sealing material arrangement step of arranging the sealing material;
The method of manufacturing a reflective display device according to claim 9, further comprising: In the display medium sealing step, the first other substrate piece and the second other substrate piece are disposed adjacent to each other,
The manufacturing method of the reflective display device is as follows:
Implemented after the display medium sealing step, the first other side substrate piece and the second other side substrate piece on the side opposite to the side facing the one side substrate, The moisture-proof film arrangement | positioning process which provides a moisture-proof film so that the gap | interval between the adjacent edge parts of a side board piece and the said 2nd other side board piece may be further provided is characterized by the above-mentioned. A method for producing the reflective display device according to claim. In the display medium sealing step, the first other substrate piece and the second other substrate piece are disposed adjacent to each other,
The manufacturing method of the reflective display device is as follows:
A packing material arranging step, which is performed after the display medium sealing step, and arranges a packing material between adjacent edges of the first other substrate piece and the second other substrate piece. The method of manufacturing a reflective display device according to claim 9, further comprising: The method further includes a conductive member disposing step of disposing a conductive member that is implemented after the display medium sealing step and electrically connects the first other side substrate piece and the second other side substrate piece. 13. The method for manufacturing a reflective display device according to claim 9,

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