Electronic paper display device

Abstract

The utility model discloses an electronic paper display device which comprises a lower protection layer, a display module, an upper protection layer and packaging glue. The lower protective layer has an upper surface and a first side surface around the upper surface. The upper side of the first side surface is connected to the upper surface. The lower side of the first side surface extends in the vertical direction of the upper surface. The display module is arranged on the upper surface of the lower protection layer. The upper protection layer is arranged on the display module. The upper protective layer has a lower surface and a second side surface around the lower surface, and the lower surface faces the display module. The display area of the display module corresponds to the lower surface. The upper side of the second side surface is connected to the lower surface, and a gap is formed between the second side surface and the first side surface. The packaging glue is filled in the gap, and the packaging glue seals the display module between the lower protection layer and the upper protection layer. Therefore, a packaging area does not need to be vacated around the display area of the display module, so that the display area has no frame, and the utilization rate of the display area is improved.

Description

Technical Field

[0001] This application relates to the technical field of information display, and more particularly to an electronic paper display device. Background Technology

[0002] As technology advances, consumer demand for e-paper displays is trending towards minimalism and aesthetic appeal. Therefore, there's a growing need to design e-paper displays with narrower bezels and even borderless designs. However, because e-paper displays require moisture protection around the display area, a border is typically created around the perimeter during manufacturing. This border acts as a water barrier, and fan-out circuitry is installed within it. Consequently, regardless of how small the installation area is, a border will always exist, affecting the display area's proportion and ultimately the overall display quality. Utility Model Content

[0003] This application provides an electronic paper display device that solves the problem of large bezel size in current electronic paper display devices.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, an electronic paper display device is provided, comprising a lower protective layer, a display module, an upper protective layer, and encapsulating adhesive. The lower protective layer has an upper surface and a first side surface surrounding the upper surface. The upper side of the first side surface is connected to the upper surface. The lower side of the first side surface extends vertically along the upper surface. The display module is disposed on the upper surface of the lower protective layer. The upper protective layer is disposed on the display module. The upper protective layer has a lower surface and a second side surface surrounding the lower surface, the lower surface facing the display module. The display area of ​​the display module corresponds to the lower surface. The upper side of the second side surface is connected to the lower surface, the lower side of the second side surface extends vertically along the lower surface and faces the first side surface, and a gap exists between the second side surface and the first side surface. Encapsulating adhesive is filled into the gap, sealing the display module between the lower and upper protective layers.

[0006] In one embodiment, the lower protective layer is formed by bending a protective layer downward around the outside of the display area of ​​the display module; the upper protective layer is formed by bending another protective layer downward around the outside of the display area of ​​the display module.

[0007] In one embodiment, the lower side of the first side surface is aligned with the lower side of the second side surface.

[0008] In one embodiment, the width of the gap is between 0.1 and 0.5 mm.

[0009] In one embodiment, the distance between the lower side of the first side surface and the lower surface of the lower protective layer is 3-10 mm.

[0010] In one embodiment, the display area of ​​the display module is bonded to the lower surface of the upper protective layer using OCA adhesive.

[0011] In one embodiment, the size of the display area of ​​the display module is the same as the size of the lower surface of the upper protective layer.

[0012] In one embodiment, the display module includes a driving backplane and an electronic paper film, the driving backplane being disposed on the upper surface of the lower protective layer, and the electronic paper film being disposed on the driving backplane.

[0013] In one embodiment, the display module further includes a driving module and a power module, which are disposed on the driving backplate and located on the side opposite to the electronic paper film.

[0014] In one embodiment, the lower protective layer is provided with a mounting hole that runs through the upper and lower surfaces of the lower protective layer, and the drive module and power module are located in the mounting hole.

[0015] In this embodiment, a potting area (gap) is formed on the side of the display module by the first side surface of the lower protective layer and the second side surface of the upper protective layer. Then, encapsulating glue is poured into the gap, and the first side surface of the lower protective layer and the second side surface of the upper protective layer are bonded together by the encapsulating glue, thereby sealing the display module between the lower and upper protective layers. In this way, there is no need to free up an encapsulation area around the display area of ​​the display module, which can make the display area borderless and improve the utilization rate of the display area. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a triangular perspective view of the electronic paper display device of this application;

[0018] Figure 2 This is a quadrilateral perspective view of the electronic paper display device of this application;

[0019] Figure 3 This is a pentagonal perspective view of the electronic paper display device of this application;

[0020] Figure 4 This is a circular perspective view of the electronic paper display device of this application;

[0021] Figure 5 yes Figure 2 Exploded view;

[0022] Figure 6 This is a perspective view of the lower protective layer of this application;

[0023] Figure 7 yes Figure 2 A bottom view.

[0024] The following explanation is based on the accompanying diagram:

[0025] 1: Electronic paper display device; 2: Lower protective layer; 21: Upper surface; 22: First side surface; 201: Mounting hole; 3: Display module; 31: Driver backplate; 32: Electronic paper film; 33: Driver module and power module; 4: Upper protective layer; 41: Lower surface; 42: Second side surface; 5: Encapsulating adhesive; A: Gap. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Please see Figures 1 to 4 These are, respectively, a triangular, a quadrilateral, a pentagonal, and a circular perspective view of the electronic paper display device of this application. As shown in the figures, the electronic paper display device 1 of this embodiment is mainly applied to a borderless electronic paper display device. The borderless electronic paper display device can be triangular, quadrilateral, pentagonal, circular, or polygonal in shape. In some other embodiments, the borderless electronic paper display device can also be other irregular shapes. In this embodiment, the electronic paper display device 1 is used as an example of a quadrilateral borderless electronic paper display device for explanation. Please refer to [the relevant documentation / reference]. Figure 6 and Figure 7 , Figure 6 yes Figure 2 Exploded diagram and Figure 7This is a perspective view of the lower protective layer; as shown, the electronic paper display device 1 includes a lower protective layer 2, a display module 3, an upper protective layer 4, and encapsulating adhesive 5. The lower protective layer 2 has an upper surface 21 and a first side surface 22 located around the upper surface 21. The upper side of the first side surface 22 is connected to the upper surface 21. The lower side of the first side surface 22 extends along the vertical direction of the upper surface 21. In this embodiment, the lower protective layer 2 is formed by bending a rectangular protective layer downward at 90 degrees around the outside of the display area of ​​the display module 3 to form a niche-shaped first hollow five-sided cube structure. The upper surface 21 is the upper surface of the first hollow five-sided cube structure, and the first side surface 22 is the outer surface of the first hollow five-sided cube structure.

[0029] Display module 3 is disposed on the upper surface 21 of lower protective layer 2. Upper protective layer 4 is disposed on display module 3. Display module 3 is located between lower protective layer 2 and upper protective layer 4. Upper protective layer 4 has a lower surface 41 and a second side surface 42 located around the lower surface 41. Lower surface 41 faces display module 3. Display area of ​​display module 3 corresponds to lower surface 41. The size of display area of ​​display module 3 is the same as the size of lower surface 41 of upper protective layer 4. Upper side of second side surface 42 is connected to lower surface 41. Lower side of second side surface 42 extends along the vertical direction of lower surface 41 and is opposite to first side surface 22. In this embodiment, upper protective layer 4 is formed by bending another rectangular protective layer downward at 90 degrees around the outside of display area of ​​display module 3 to form a niche-shaped second hollow five-sided cube structure, lower surface 41 is the lower surface of second hollow five-sided cube structure, and second side surface 42 is the inner surface of second hollow five-sided cube structure.

[0030] As described above, the lower side of the first side surface 22 is aligned with the lower side of the second side surface 42. The distance between the lower side of the first side surface 22 and the lower surface of the lower protective layer 2 is 3-10 mm, for example, 3 mm, 5 mm, or 10 mm. Please refer to [further details omitted]. Figure 7 , it is Figure 2 The figure shows a bottom view; as shown, there is a gap A between the second side surface 42 and the first side surface 22, wherein the first side surface 22 is located inside the second side surface 42. The width of the gap A is between 0.1-0.5 mm, for example, 0.1 mm, 0.3 mm, or 0.5 mm. Encapsulating adhesive 5 is filled into the gap A. The encapsulating adhesive 5 can be a waterproof adhesive. By filling the gap A with waterproof adhesive, the first side surface 22 of the lower protective layer 2 and the second side surface 42 of the upper protective layer 4 are bonded into an integral structure, thereby sealing the display module 3 between the lower protective layer 2 and the upper protective layer 4.

[0031] In this embodiment, the electronic paper display device 1 forms a potting area (gap A) on the side of the display module 3 by means of the first side surface 22 of the lower protective layer 2 and the second side surface 42 of the upper protective layer 4. Then, the encapsulating adhesive 5 is poured into the gap A, and the first side surface 22 of the lower protective layer 2 and the second side surface 42 of the upper protective layer 4 are bonded together by the encapsulating adhesive 5, thereby sealing the display module 3 between the lower protective layer 2 and the upper protective layer 4. In this way, there is no need to free up an encapsulation area around the display area of ​​the display module 3, which can make the display area borderless and improve the utilization rate of the display area.

[0032] In this embodiment, the display area of ​​the display module 3 is bonded to the lower surface 41 of the upper protective layer 4 using OCA (Optical Clear Adhesive). OCA adhesive is colorless and transparent, with a light transmittance of over 90%, even reaching 99%. Using OCA adhesive to bond the display module 3 to the upper protective layer 4 ensures the light transmittance of the display area. The display module 3 includes a driving backplate 31 and an electronic paper film 32. The driving backplate 31 is disposed on the upper surface 21 of the lower protective layer 2. The electronic paper film 32 is disposed on the driving backplate 31. The upper surface of the electronic paper film 32 is the display area of ​​the display module 3, and the electronic paper film 32 is bonded to the lower surface 41 of the upper protective layer 4 using OCA adhesive.

[0033] As described above, the driving backplate 31 is mainly used to provide an electric field for the electronic paper film 32. The driving backplate 31 is equipped with an array of thin-film transistors. Generally, driving electrodes (not shown in the figure) are also provided on the driving backplate 31. Each driving circuit is assigned a different voltage through the thin-film transistors, and through array driving technology, multiple pixels can display different gray levels. It can be understood that a common electrode (not shown in the figure) is also provided on the side of the electronic paper film 32 away from the driving electrodes. Through the combined action of the driving electrodes and the common electrode, the positively charged and negatively charged colored particles in the electronic paper film 32 move up and down.

[0034] See also Figure 5 As shown, the display module 3 also includes a driving module and a power module 33. The driving module and power module 33 are disposed on the driving back plate 31 and located on the side opposite to the electronic paper film 32. The driving back plate 31 is provided with circuitry connecting the driving module and power module 33 to the driving electrodes. Thus, the driving module and power module 33 drive the signal of the display module 3, enabling normal image display. In this embodiment, the lower protective layer 2 is provided with a mounting hole 201 that penetrates the upper surface 21 and the lower surface of the lower protective layer 2, and the driving module and power module 33 are located within the mounting hole 201.

[0035] In summary, this application provides an electronic paper display device. By forming a potting area on the side of the display module through the first side surface of the lower protective layer and the second side surface of the upper protective layer, encapsulating adhesive is then poured into the gap. The encapsulating adhesive is used to bond the first side surface of the lower protective layer and the second side surface of the upper protective layer together, thereby sealing the display module between the lower and upper protective layers. In this way, there is no need to free up an encapsulation area around the display area of ​​the display module, which can make the display area borderless and improve the utilization rate of the display area.

[0036] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic paper display device, characterized by comprising: The application relates to a display module, comprising: a lower protective layer having an upper surface and a first side surface around the upper surface, the upper side of the first side surface being connected to the upper surface, and the lower side of the first side surface extending along the vertical direction of the upper surface; a display module arranged on the upper surface of the lower protective layer; an upper protective layer arranged on the display module, the upper protective layer having a lower surface and a second side surface around the lower surface, the lower surface facing the display module, the display area of the display module corresponding to the lower surface, the upper side of the second side surface being connected to the lower surface, the lower side of the second side surface extending along the vertical direction of the lower surface and being opposite to the first side surface, and a gap being formed between the second side surface and the first side surface; an encapsulation glue filled in the gap, the encapsulation glue sealing the display module between the lower protective layer and the upper protective layer. 2.The electronic paper display device of claim 1, wherein, The lower protective layer is formed by bending a protective layer downward around the display area of the display module; and the upper protective layer is formed by bending another protective layer downward around the display area of the display module. 3.The electronic paper display device of claim 1, wherein, The lower side of the first side surface is aligned with the lower side of the second side surface. 4.The electronic paper display device of claim 1, wherein, The width of the gap is between 0.1 mm and 0.5 mm. 5.The electronic paper display device of claim 1, wherein, The distance between the lower side of the first side surface and the lower surface of the lower protective layer is 3-10 mm. 6.The electronic paper display device of claim 1, wherein, The display area of the display module is adhered to the lower surface of the upper protective layer by OCA glue. 7.The electronic paper display device of claim 1, wherein, The size of the display area of the display module is the same as the size of the lower surface of the upper protective layer. 8.The electronic paper display device of claim 1, wherein, The display module comprises a driving backboard and an electronic paper film, the driving backboard is arranged on the upper surface of the lower protective layer, and the electronic paper film is arranged on the driving backboard. 9.The electronic paper display device of claim 8, wherein, The display module further comprises a driving module and a power module, the driving module and the power module are arranged on the driving backboard and located on the side away from the electronic paper film. 10.The electronic paper display device of claim 9, wherein, The lower protective layer is provided with a mounting hole penetrating through the upper surface and the lower surface of the lower protective layer, and the driving module and the power module are located in the mounting hole.

Images