Capsule type electrophoretic display medium film and manufacturing method thereof

Abstract

The invention provides a capsule type electrophoretic display medium film and a manufacturing method thereof. The capsule type electrophoretic display medium film comprises a first stretchable film, a second stretchable film and a capsule type electrophoretic display medium. The second stretchable film is disposed on the first stretchable film. The capsule-type electrophoretic display medium is disposed between the first stretchable film and the second stretchable film and includes a plurality of capsules, wherein at least one of the plurality of capsules presents an elliptical shape, a polygonal shape, or an irregular shape when the capsule-type electrophoretic display medium film is in a non-stretched state.

Description

Technical Field

[0001] The invention relates to an electronic product and a manufacturing method thereof, and in particular to a capsule-type electrophoretic display medium film and a manufacturing method thereof. Background Art

[0002] Electrophoretic displays have advantages such as light weight and thin thickness. In the case of a flexible substrate structure, they can also be stretched and unbreakable. However, the stretchability of electrophoretic displays is limited by the stretchability of the display medium. The stretchability of the display medium has an upper limit on deformation due to material or structural limitations, which limits product applications and affects consumers' experience. Summary of the invention

[0003] The invention provides a capsule type electrophoretic display medium film and a manufacturing method thereof, which are helpful to improve stretchability.

[0004] According to an embodiment of the present invention, a capsule-type electrophoretic display medium film comprises a first stretchable film, a second stretchable film and a capsule-type electrophoretic display medium. The second stretchable film is arranged on the first stretchable film. The capsule-type electrophoretic display medium is arranged between the first stretchable film and the second stretchable film and comprises a plurality of capsules, wherein at least one capsule of the plurality of capsules presents an elliptical shape, a polygonal shape or an irregular shape when the capsule-type electrophoretic display medium film is in a non-stretched state.

[0005] In an embodiment according to the invention, the aspect ratio of at least one capsule falls within the range of 1.3 to 1.7.

[0006] In an embodiment according to the present invention, the materials of the first stretchable film and the second stretchable film include thermoplastic elastomer.

[0007] In an embodiment of the present invention, the Young's modulus of the first stretchable film and the second stretchable film is 1-1000 Mpa.

[0008] In an embodiment according to the present invention, the capsule-type electrophoretic display medium film further comprises a first stretchable electrode and a second stretchable electrode. The first stretchable electrode is arranged between the first stretchable film and the second stretchable film. The second stretchable electrode is arranged between the first stretchable electrode and the second stretchable film.

[0009] In an embodiment according to the present invention, the materials of the first stretchable electrode and the second stretchable electrode include polymer conductive material, carbon nanotubes, conductive silver paste or conductive carbon paste.

[0010] In an embodiment according to the present invention, the capsule - type electrophoretic display medium film further includes a third stretchable film and an encapsulating adhesive. The first stretchable film, the first stretchable electrode, the capsule - type electrophoretic display medium, the second stretchable electrode, and the second stretchable film are stacked on the third stretchable film in sequence. The encapsulating adhesive is disposed between the third stretchable film and the second stretchable electrode and surrounds the first stretchable film, the first stretchable electrode, and the capsule - type electrophoretic display medium.

[0011] According to an embodiment of the present invention, a manufacturing method of the capsule - type electrophoretic display medium film includes: stretching the first stretchable film; attaching the capsule - type electrophoretic display medium to the first stretchable film when the first stretchable film is in a stretched state; stretching the second stretchable film; attaching the second stretchable film to the capsule - type electrophoretic display medium when both the first stretchable film and the second stretchable film are in a stretched state; and releasing the tensile stress of the first stretchable film and the second stretchable film to pre - shrink the capsule - type electrophoretic display medium.

[0012] In an embodiment according to the present invention, the stretching amount of the first stretchable film and the second stretchable film is greater than 0% and less than or equal to 100%.

[0013] According to an embodiment of the present invention, a manufacturing method of the capsule - type electrophoretic display medium film includes: forming a first stretchable electrode on the first stretchable film and stretching the first stretchable film; attaching the capsule - type electrophoretic display medium to the first stretchable electrode when the first stretchable film is in a stretched state; releasing the tensile stress of the first stretchable film to pre - shrink the capsule - type electrophoretic display medium; forming a second stretchable electrode on the second stretchable film; and attaching the second stretchable electrode formed on the second stretchable film to the capsule - type electrophoretic display medium.

[0014] In an embodiment according to the present invention, the manufacturing method of the capsule - type electrophoretic display medium film further includes: stretching the second stretchable film after forming the second stretchable electrode on the second stretchable film and before attaching the second stretchable electrode to the capsule - type electrophoretic display medium. When attaching the second stretchable electrode to the capsule - type electrophoretic display medium, both the first stretchable film and the second stretchable film are in a stretched state. Pre - shrinking the capsule - type electrophoretic display medium further includes releasing the tensile stress of the second stretchable film.

[0015] In an embodiment according to the present invention, the stretching amount of the first stretchable film and the second stretchable film is greater than 100% and less than or equal to 1000%.

[0016] In an embodiment according to the present invention, pre - shrinking the capsule - type electrophoretic display medium is before attaching the second stretchable electrode to the capsule - type electrophoretic display medium, and when attaching the second stretchable electrode to the capsule - type electrophoretic display medium, the second stretchable film is in a non - stretched state.

[0017] In an embodiment according to the present invention, the method for manufacturing a capsule-type electrophoretic display medium film further includes: attaching a third stretchable film to the first stretchable film; and forming a encapsulating adhesive between the third stretchable film and the second stretchable electrode to surround the first stretchable film, the first stretchable electrode, and the capsule-type electrophoretic display medium.

[0018] To make the above features and advantages of the present invention more obvious and understandable, specific embodiments are hereinafter given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated into and constitute a part of this specification. The drawings illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0020] Figures 1A to 1D is a partial cross-sectional schematic view of a manufacturing process of a capsule-type electrophoretic display medium film according to an embodiment of the present disclosure;

[0021] Figure 2 is Figure 1D a partially enlarged top view schematic view of the capsule-type electrophoretic display medium in ;

[0022] Figures 3A to 3E is a partial cross-sectional schematic view of a manufacturing process of a capsule-type electrophoretic display medium film according to another embodiment of the present disclosure;

[0023] Figures 4A to 4E is a partial cross-sectional schematic view of a manufacturing process of a capsule-type electrophoretic display medium film according to still another embodiment of the present disclosure.

[0024] DESCRIPTION OF REFERENCE NUMERALS IN THE DRAWINGS

[0025] 1, 2, 3: Capsule-type electrophoretic display medium film;

[0026] 10: First stretchable film;

[0027] 11: First stretchable electrode;

[0028] 12: Capsule-type electrophoretic display medium;

[0029] 13: Second stretchable electrode;

[0030] 14: Second stretchable film;

[0031] 15: Third stretchable film;

[0032] 16: Encapsulating adhesive;

[0033] 120, 120A, 120B, 120C, 120D, 120E, 120F, 120G, 120H, 120I, 120J: Capsules;

[0034] 120L: Long axis;

[0035] 120S: Short axis;

[0036] C: Center;

[0037] W1, W1’, W2, W2’, W3, W3’: Widths;

[0038] X, Y, Z: Directions. Detailed implementation manners

[0039] The directional terms mentioned in this text, such as: "upper", "lower", "front", "rear", "left", "right", etc., are only references to the directions in the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present invention.

[0040] In the accompanying drawings, each drawing shows the general characteristics of the methods, structures, and / or materials used in specific embodiments. However, these drawings should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative sizes, thicknesses, and positions of each film layer, region, or structure may be reduced or enlarged.

[0041] In the accompanying drawings, the same or similar elements will be denoted by the same or similar reference numerals, and the description thereof will be omitted in the specification. In addition, the features in different embodiments can be combined with each other without conflict, and simple equivalent changes and modifications made according to this specification or the claims still fall within the scope covered by the present invention.

[0042] The terms "first", "second", etc. mentioned in this specification or the claims are only used to name different elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limits of the number of elements, nor are they used to define the manufacturing order or setting order of the elements. In addition, an element / film layer being disposed on another element / film layer (or above) can cover the case where the element / film layer is directly disposed on the other element / film layer (or above) and the two element / film layers are in direct contact; and the case where the element / film layer is indirectly disposed on the other element / film layer (or above) and there is one or more element / film layers between the two element / film layers.

[0043] Figures 1A to 1D is a partial cross-sectional schematic view of the manufacturing process of a capsule-type electrophoretic display medium film according to an embodiment of the present disclosure. Figure 2 is Figure 1D a partially enlarged top view of the capsule-type electrophoretic display medium 12 in

[0044] Please refer to Figure 1A , the method for manufacturing a capsule electrophoretic display medium film may include stretching a first stretchable film 10. Figure 1A The dashed line in Figure 1A represents the unstretched first stretchable film 10, and

[0045] In some embodiments, the first stretchable film 10 may be a release film having stretchability. For example, the material of the first stretchable film 10 may include thermoplastic elastomers (TPE). Thermoplastic elastomers may include thermoplastic rubber elastomers (TPR), thermoplastic vulcanizates (TPV), thermoplastic polyurethane resins (TPU), or thermoplastic polyether ester elastomers (TPEE), but are not limited thereto.

[0046] In some embodiments, the step of stretching the first stretchable film 10 may stretch the first stretchable film 10 from a width W1 to a width W1', and the stretching amount of the first stretchable film 10 is greater than 100% and less than or equal to 1000%, preferably in the range where the stretching amount is greater than 100% and less than or equal to 800%. The stretching amount is defined as the width variation amount divided by the original width multiplied by the percentage, that is, (W1'-W1) / W1*100%.

[0047] Figure 1A Schematically shows that the first stretchable film 10 is stretched in a direction parallel to the direction X (such as the direction X and its opposite direction), but the present disclosure is not limited thereto. According to different requirements, the first stretchable film 10 may be stretched in other directions (such as the direction Y and its opposite direction). The direction X and the direction Y intersect with each other and are both parallel to the surface of the first stretchable film 10 and perpendicular to the thickness direction of the first stretchable film 10 (such as the direction Z). In some embodiments, the direction X and the direction Y are perpendicular to each other.

[0048] Please refer to Figure 1B and Figure 1C , the method for manufacturing a capsule electrophoretic display medium film may further include attaching the capsule electrophoretic display medium 12 to the first stretchable film 10 while the first stretchable film 10 is in a stretched state. In other words, without releasing the tensile stress applied to the first stretchable film 10, the capsule electrophoretic display medium 12 may be attached to the first stretchable film 10 through an adhesive layer (not shown).

[0049] In some embodiments, as Figure 1B shown, the capsule electrophoretic display medium 12 is attached to the first stretchable film 10 in a stretched state in a non-stretched state. Herein, a certain film layer being in a non-stretched state means that the stretching amount of the film layer is zero or approaches zero. For example, the film layer may be in an unfolded state but the size (such as width) of the film layer has not changed substantially.

[0050] In some embodiments, as Figure 2 shown, the capsule electrophoretic display medium 12 may include a plurality of capsules 120. The plurality of capsules 120 are distributed on the plane formed by the direction X and the direction Y. Although not shown, a transparent liquid and particles of various colors (such as black and white and / or other colors) located in the transparent liquid may be formed in each capsule 120, and particles of different colors carry different electric charges (such as positive and negative charges). By controlling an applied voltage or electric field (not shown), the distribution state of particles of different colors can be changed, and thus the color presented by the capsule electrophoretic display medium 12 can be controlled.

[0051] Please refer to Figure 1C , the method for manufacturing the capsule electrophoretic display medium film may further include stretching the second stretchable film 14. Figure 1C The dashed line in Figure 1C represents the non-stretched second stretchable film 14, and

[0052] the solid line in

[0053] represents the stretched second stretchable film 14.

[0052] In some embodiments, the second stretchable film 14 may be a release film having stretchability. For example, the material of the second stretchable film 14 may include thermoplastic elastomers. Thermoplastic elastomers may include thermoplastic rubber elastomers, thermoplastic vulcanized rubbers, plasticized polyurethane resins, or thermoplastic polyester elastomers, but are not limited thereto.

[0053] In some embodiments, the step of stretching the second stretchable film 14 may stretch the second stretchable film 14 from a width W2 to a width W2', and the stretching amount of the second stretchable film 14 is greater than 100% and less than or equal to 1000%, and a preferred range is that the stretching amount is greater than 100% and less than or equal to 800%. The stretching amount is defined as the width variation amount divided by the original width multiplied by a percentage, that is, (W2' - W2) / W2 * 100%.

[0054] Figure 1C It is schematically shown that the second stretchable film 14 is stretched in the direction parallel to the direction X (such as the direction X and its opposite direction), but the present disclosure is not limited thereto. According to different requirements, the second stretchable film 14 may be stretched in other directions (such as the direction Y and its opposite direction).

[0055] Continuing to refer to Figure 1C, the method for manufacturing a capsule electrophoretic display medium film may further include attaching the second stretchable film 14 to the capsule electrophoretic display medium 12 while both the first stretchable film 10 and the second stretchable film 14 are in a stretched state. In other words, without releasing the tensile stress applied to the first stretchable film 10 and the second stretchable film 14, the second stretchable film 14 can be attached to the capsule electrophoretic display medium 12 through an adhesive layer (not shown).

[0056] Please refer to Figure 1D , the method for manufacturing a capsule electrophoretic display medium film may further include releasing the tensile stress of the first stretchable film 10 and the second stretchable film 14 to pre-shrink the capsule electrophoretic display medium 12. Figure 1D The dashed lines in Figure 1D represent the first stretchable film 10, the capsule electrophoretic display medium 12, and the second stretchable film 14 before the release of the tensile stress, and

[0057] The solid lines in

[0058] represent the first stretchable film 10, the capsule electrophoretic display medium 12, and the second stretchable film 14 after the release of the tensile stress.

[0059] In this pre-shrinking step, the capsule electrophoretic display medium 12 shrinks, for example, from width W3 to width W3'. And the shrinkage amount of the capsule electrophoretic display medium 12 is greater than 100% and less than or equal to 1000%, preferably in the range of greater than 100% and less than or equal to 800%. The shrinkage amount is defined as the absolute value of the width variation divided by the original width multiplied by the percentage, that is, |(W3' - W3)| / W3 * 100%.

[0058] By pre-shrinking the capsule electrophoretic display medium 12, the multiple capsules in the capsule electrophoretic display medium 12 can be arranged more closely, so that the capsule electrophoretic display medium 12 has higher stretchability. According to an experimental example, the multiple capsules in the non-pre-shrunk capsule electrophoretic display medium start to rupture when the stretching amount is about 31% to 35%, while the multiple capsules in the pre-shrunk capsule electrophoretic display medium start to rupture when the stretching amount is about 70%. This proves that the pre-shrunk capsule electrophoretic display medium has higher stretchability.

[0059] After completing the pre-shrinking step, the production of the capsule electrophoretic display medium film 1 is initially completed. Please refer to Figure 1D and Figure 2, the capsule - type electrophoretic display medium film 1 may include a first stretchable film 10, a second stretchable film 14, and a capsule - type electrophoretic display medium 12. The second stretchable film 14 is disposed on the first stretchable film 10. The capsule - type electrophoretic display medium 12 is disposed between the first stretchable film 10 and the second stretchable film 14 and includes a plurality of capsules 120, wherein at least one of the plurality of capsules 120 (such as capsule 120A, capsule 120B, capsule 120C, capsule 120D, capsule 120E, capsule 120F, capsule 120G, capsule 120H, capsule 120I, or capsule 120J) presents an elliptical shape, a polygonal shape, or an irregular shape when the capsule - type electrophoretic display medium film 1 is in a non - stretched state (i.e., the amount of stretch is zero or approaches zero).

[0060] Specifically, after the aforementioned pre - shrinking step, the plurality of capsules 120 in the capsule - type electrophoretic display medium 12 are arranged more closely under compressive stress, and at least one capsule 120 is compressed and changes from a near - circular shape to a near - elliptical shape, a polygonal shape, or an irregular shape. Herein, the capsule 120 presenting an elliptical shape generally refers to the capsule 120 having a major axis 120L and a minor axis 120S that are perpendicular to each other. Viewed from a top view, the minor axis 120S passes through the center C of the capsule 120 and connects the two relatively closest ends in the capsule 120, the major axis 120L passes through the center C of the capsule 120 and is perpendicular to the minor axis 120S, and the major axis 120L is longer than the minor axis 120S. In some embodiments, in the capsule - type electrophoretic display medium 12, for more than about 20% of the capsules, the ratio of the major axis 120L to the minor axis 120S (aspect ratio) is above 1.3, that is, 120L / 120S≥1.3. In some embodiments, the aspect ratio of at least one capsule 120 falls within the range of 1.3 to 1.7. As Figure 2 shown, the aspect ratios of capsule 120A, capsule 120B, capsule 120C, capsule 120D, capsule 120E, capsule 120F, capsule 120G, capsule 120H, capsule 120I, and capsule 120J are 1.52, 1.41, 1.68, 1.55, 1.27, 1.59, 1.64, 1.47, 1.52, and 1.46, respectively. Figure 2 In it, for more than about 20% of the capsules, the aspect ratio will be within the range of 1.3 - 1.7.

[0061] Figures 3A to 3E is a partial cross - sectional schematic view of the manufacturing process of a capsule - type electrophoretic display medium film according to another embodiment of the present disclosure. Please first refer to Figure 3A and Figure 3B , the manufacturing method of the capsule - type electrophoretic display medium film may include forming a first stretchable electrode 11 on the first stretchable film 10 (refer to Figure 3A ) and stretching the first stretchable film 10 (refer to Figure 3B ).

[0062] For the relevant content of the first stretchable film 10, please refer to the foregoing and will not be repeated here. The material of the first stretchable electrode 11 may include a polymer conductive material, carbon nanotubes, conductive silver paste, conductive carbon paste or other conductive materials with high tensile strength, and the first stretchable electrode 11 may be formed on the first stretchable film 10 by coating or other feasible means, for example. When the first stretchable film 10 is stretched, the first stretchable electrode 11 can be stretched together with the first stretchable film 10, and the stretching amount of the first stretchable electrode 11 can be the same as or approximate to that of the first stretchable film 10, which is not limited here.

[0063] Please continue to refer to Figure 3B , the manufacturing method of the capsule-type electrophoretic display medium film may further include attaching the capsule-type electrophoretic display medium 12 to the first stretchable electrode 11 when the first stretchable film 10 is in a stretched state. In other words, without releasing the tensile stress applied to the first stretchable film 10, the capsule-type electrophoretic display medium 12 can be attached to the first stretchable electrode 11 through an adhesive layer (not shown). For the relevant content of the capsule-type electrophoretic display medium 12, please refer to the foregoing and will not be repeated here.

[0064] Please refer to Figure 3C , the manufacturing method of the capsule-type electrophoretic display medium film may further include forming a second stretchable electrode 13 on the second stretchable film 14. The material of the second stretchable electrode 13 may include a polymer conductive material, carbon nanotubes, conductive silver paste, conductive carbon paste or other conductive materials with high tensile strength, and the second stretchable electrode 13 may be formed on the second stretchable film 14 by coating or other feasible means, for example.

[0065] Please refer to Figure 3D , the manufacturing method of the capsule-type electrophoretic display medium film may further include attaching the second stretchable electrode 13 formed on the second stretchable film 14 to the capsule-type electrophoretic display medium 12. In some embodiments, as Figure 3D shown, the manufacturing method of the capsule-type electrophoretic display medium film may further include stretching the second stretchable film 14 after forming the second stretchable electrode 13 on the second stretchable film 14 and before attaching the second stretchable electrode 13 to the capsule-type electrophoretic display medium 12. When the second stretchable film 14 is stretched, the second stretchable electrode 13 can be stretched together with the second stretchable film 14, and the stretching amount of the second stretchable electrode 13 can be the same as or approximate to that of the second stretchable film 14, which is not limited here.

[0066] When attaching the second stretchable electrode 13 to the capsule electrophoretic display medium 12, both the first stretchable film 10 and the second stretchable film 14 are in a stretched state. At the same time, the first stretchable electrode 11 provided on the first stretchable film 10 and the second stretchable electrode 13 provided on the second stretchable film 14 are also in a stretched state. In addition, the step of attaching the second stretchable electrode 13 to the capsule electrophoretic display medium 12 may include flipping the second stretchable film 14 so that the second stretchable electrode 13 faces the capsule electrophoretic display medium 12, and then attaching the second stretchable electrode 13 to the capsule electrophoretic display medium 12 through an adhesive layer (not shown).

[0067] Please refer to Figure 3E , the method for manufacturing the capsule electrophoretic display medium film may further include releasing the tensile stress of the first stretchable film 10 to pre-shrink the capsule electrophoretic display medium 12. In some embodiments, as Figure 3E shown, pre-shrinking the capsule electrophoretic display medium 12 may further include releasing the tensile stress of the second stretchable film 14. In other words, after attaching the second stretchable electrode 13 to the capsule electrophoretic display medium 12, the tensile stresses of the first stretchable film 10 and the second stretchable film 14 may be released to pre-shrink the capsule electrophoretic display medium 12. Figure 3E The dashed lines in Figure 3E represent the first stretchable film 10, the first stretchable electrode 11, the capsule electrophoretic display medium 12, the second stretchable electrode 13, and the second stretchable film 14 before the release of the tensile stress, and

[0068] the solid lines in

[0069] represent the first stretchable film 10, the first stretchable electrode 11, the capsule electrophoretic display medium 12, the second stretchable electrode 13, and the second stretchable film 14 after the release of the tensile stress. Figure 3E and Figure 2, the capsule electrophoretic display medium film 2 may include a first stretchable film 10, a second stretchable film 14, a first stretchable electrode 11, a second stretchable electrode 13, and a capsule electrophoretic display medium 12. The second stretchable film 14 is disposed on the first stretchable film 10. The first stretchable electrode 11 is disposed between the first stretchable film 10 and the second stretchable film 14. The second stretchable electrode 13 is disposed between the first stretchable electrode 11 and the second stretchable film 14. The capsule electrophoretic display medium 12 is disposed between the first stretchable electrode 11 and the second stretchable electrode 13 and includes a plurality of capsules 120, wherein at least one of the plurality of capsules 120 (such as capsule 120A, capsule 120B, capsule 120C, capsule 120D, capsule 120E, capsule 120F, capsule 120G, capsule 120H, capsule 120I, or capsule 120J) presents an elliptical shape, a polygonal shape, or an irregular shape when the capsule electrophoretic display medium film 2 is in a non-stretched state. For the related content of the capsule 120, please refer to the foregoing and will not be repeated here.

[0070] Figures 4A to 4E is a partial cross-sectional schematic view of a manufacturing process of a capsule electrophoretic display medium film according to another embodiment of the present disclosure. Please first refer to Figure 4A and Figure 4B , the manufacturing method of the capsule electrophoretic display medium film may include forming a first stretchable electrode 11 on the first stretchable film 10 (refer to Figure 4A ) and stretching the first stretchable film 10 (refer to Figure 4B ). For the related content of the above steps, please refer to the foregoing (corresponding to Figure 3A and Figure 3B description), and will not be repeated here.

[0071] Please continue to refer to Figure 4B , the manufacturing method of the capsule electrophoretic display medium film may further include attaching the capsule electrophoretic display medium 12 to the first stretchable electrode 11 when the first stretchable film 10 is in a stretched state. For the related content of this step, please refer to the foregoing (corresponding to Figure 3B description), and will not be repeated here.

[0072] Please refer to Figure 4C , the manufacturing method of the capsule electrophoretic display medium film may further include forming a second stretchable electrode 13 on the second stretchable film 14. For the material of the second stretchable electrode 13 and the related content formed on the second stretchable film 14, please refer to the foregoing (corresponding to Figure 3C(description of which will not be repeated here). In some embodiments, the second stretchable film 14 may be a substrate having water-blocking properties. For example, the material of the second stretchable film 14 may include a water-blocking material. The water-blocking material may include polyethylene terephthalate (PET) or polychlorotrifluoroethylene (PCTFE), but is not limited thereto.

[0073] Please refer to Figure 4C and Figure 4D , the method for manufacturing a capsule-type electrophoretic display medium film may further include: releasing the tensile stress of the first stretchable film 10 to pre-shrink the capsule-type electrophoretic display medium 12 (refer to Figure 4C ); and attaching the second stretchable electrode 13 formed on the second stretchable film 14 to the capsule-type electrophoretic display medium 12 (refer to Figure 4D ). Figure 4C The dashed lines in Figure 4C represent the first stretchable film 10, the first stretchable electrode 11, and the capsule-type electrophoretic display medium 12 before the release of the tensile stress, and

[0074] The solid lines in Figure 3D and Figure 3E represent the first stretchable film 10, the first stretchable electrode 11, and the capsule-type electrophoretic display medium 12 after the release of the tensile stress.

[0075] Different from

[0076] Please refer to Figure 4D , the method for manufacturing a capsule-type electrophoretic display medium film may further include attaching a third stretchable film 15 to the first stretchable film 10. In some embodiments, the third stretchable film 15 may be a substrate having water-blocking properties. For example, the material of the third stretchable film 1 may include a water-blocking material. The water-blocking material may include polyethylene terephthalate or polychlorotrifluoroethylene, but is not limited thereto. In addition, the third stretchable film 15 may be attached to the first stretchable film 10 through an adhesive layer (not shown).

[0077] Please refer to Figure 4E , the method for manufacturing the capsule electrophoretic display medium film may further include forming a sealing adhesive 16 between the third stretchable film 15 and the second stretchable electrode 13 to surround the first stretchable film 10, the first stretchable electrode 11, and the capsule electrophoretic display medium 12. In some embodiments, the material of the sealing adhesive 16 may include thermoplastic, thermosetting, ultraviolet curable, or room temperature curable polymer hardening adhesives, but is not limited thereto.

[0078] After forming the sealing adhesive 16, the production of the capsule electrophoretic display medium film 3 is preliminarily completed. Please refer to Figure 4E , the main differences between the capsule electrophoretic display medium film 3 and Figure 3E the capsule electrophoretic display medium film 2 are described as follows. In the capsule electrophoretic display medium film 3, the second stretchable film 14 is a substrate having water-blocking properties (i.e., the material of the second stretchable film 14 includes water-blocking materials). In addition, the capsule electrophoretic display medium film 3 further includes a third stretchable film 15 and a sealing adhesive 16, wherein the first stretchable film 10, the first stretchable electrode 11, the capsule electrophoretic display medium 12, the second stretchable electrode 13, and the second stretchable film 14 are stacked on the third stretchable film 15 in sequence, and the sealing adhesive 16 is disposed between the third stretchable film 15 and the second stretchable electrode 13 and surrounds the first stretchable film 10, the first stretchable electrode 11, and the capsule electrophoretic display medium 12.

[0079] In the present invention, the tensile film Young's modulus of the first stretchable film 10, the second stretchable film 14, or the third stretchable film 15 may be 1 to 1000 Mpa, and a preferred range is 1 to 100 Mpa.

[0080] In summary, in the embodiments of the present invention, by pre-shrinking the capsule electrophoretic display medium, the plurality of capsules in the capsule electrophoretic display medium can be arranged more closely, so that the capsule electrophoretic display medium has higher stretchability.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A capsule-type electrophoretic display medium film, characterized in that, include: a first stretchable film; a second stretchable film, disposed on the first stretchable film; as well as The capsule-type electrophoretic display medium is arranged between the first stretchable film and the second stretchable film and comprises a plurality of capsules, wherein at least one capsule of the plurality of capsules presents an elliptical, polygonal or irregular shape when the capsule-type electrophoretic display medium film is in a non-stretched state.

2. The capsule-type electrophoretic display medium thin film according to claim 1, characterized in that The at least one capsule has an aspect ratio falling within the range of 1.3 to 1.

7.

3. The capsule-type electrophoretic display medium thin film according to claim 1, wherein The materials of the first stretchable film and the second stretchable film include thermoplastic elastomer.

4. The capsule-type electrophoresis display medium film according to claim 1, wherein The first stretchable film and the second stretchable film have a Young's modulus of 1 to 1000 MPa.

5. The capsule-type electrophoresis display medium film according to claim 1, characterized in that, Also includes: a first stretchable electrode disposed between the first stretchable film and the second stretchable film; as well as The second stretchable electrode is arranged between the first stretchable electrode and the second stretchable film.

6. The capsule-type electrophoretic display medium thin film according to claim 5, wherein The materials of the first stretchable electrode and the second stretchable electrode include polymer conductive materials, carbon nanotubes, conductive silver paste or conductive carbon paste.

7. The capsule-type electrophoretic display medium thin film according to claim 5, characterized in that, Also includes: a third stretchable film, wherein the first stretchable film, the first stretchable electrode, the capsule-type electrophoretic display medium, the second stretchable electrode, and the second stretchable film are sequentially stacked on the third stretchable film; as well as The packaging glue is disposed between the third stretchable film and the second stretchable electrode and surrounds the first stretchable film, the first stretchable electrode and the capsule-type electrophoretic display medium.

8. A method for manufacturing a capsule-type electrophoretic display medium film, characterized in that, include: stretching the first stretchable film; When the first stretchable film is in a stretched state, attaching a capsule-type electrophoretic display medium to the first stretchable film; stretching the second stretchable film; When the first stretchable film and the second stretchable film are both in a stretched state, attaching the second stretchable film to the capsule-type electrophoretic display medium; as well as The stretching stress of the first stretchable film and the second stretchable film is released to pre-shrink the capsule-type electrophoretic display medium.

9. The method for manufacturing a capsule-type electrophoretic display medium thin film according to claim 8, characterized in that, The stretching amounts of the first stretchable film and the second stretchable film are greater than 100% and less than or equal to 1000%.

10. A method for manufacturing a capsule-type electrophoretic display medium film, characterized in that, include: forming a first stretchable electrode on a first stretchable film and stretching the first stretchable film; When the first stretchable film is in a stretched state, attaching a capsule-type electrophoretic display medium to the first stretchable electrode; releasing the tensile stress of the first stretchable film to pre-shrink the capsule-type electrophoretic display medium; forming a second stretchable electrode on the second stretchable film; as well as The second stretchable electrode formed on the second stretchable film is attached to the capsule type electrophoretic display medium.

11. The manufacturing method of the capsule-type electrophoresis display medium film according to claim 10, characterized in that, Also includes: After forming the second stretchable electrode on the second stretchable film and before attaching the second stretchable electrode to the capsule-type electrophoretic display medium, stretching the second stretchable film, When the second stretchable electrode is attached to the capsule-type electrophoretic display medium, the first stretchable film and the second stretchable film are both in a stretched state, and Pre - shrinking the capsule - type electrophoretic display medium further includes releasing the tensile stress of the second stretchable film.

12. The manufacturing method of the capsule-type electrophoretic display medium film according to claim 11, wherein, The amount of stretching of the first stretchable film and the second stretchable film is greater than 100% and less than or equal to 1000%.

13. The manufacturing method of the capsule-type electrophoretic display medium thin film according to claim 11, characterized in that, Pre - shrinking the capsule - type electrophoretic display medium is performed before attaching the second stretchable electrode to the capsule - type electrophoretic display medium, and when attaching the second stretchable electrode to the capsule - type electrophoretic display medium, the second stretchable film is in a non - stretched state.

14. The manufacturing method of the capsule-type electrophoretic display medium film according to claim 13, characterized in that, It further includes: Attaching a third stretchable film to the first stretchable film; and Forming a encapsulating adhesive between the third stretchable film and the second stretchable electrode to surround the first stretchable film, the first stretchable electrode, and the capsule - type electrophoretic display medium.

Images