Display device

Abstract

A display device comprises a stretchable panel, a telescopic mechanism, a first adhesive layer and a second adhesive layer. The stretchable panel is provided with an operation surface; the telescopic mechanism is arranged on the side, back to the operation face, of the stretchable panel and provided with a bearing face facing the stretchable panel. The telescopic mechanism is suitable for driving the stretchable panel to deform in the direction intersecting with the operation face. The first adhesive layer is connected with the stretchable panel and the bearing surface of the telescopic mechanism; the second adhesive layer is connected with the stretchable panel and the bearing surface of the telescopic mechanism; the second adhesive layer is arranged between the edge of the bearing face and the first adhesive layer, and the Young modulus of the second adhesive layer is larger than that of the first adhesive layer.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a stretchable display device. Background Art

[0002] There is a display device that combines a stretchable panel and a deformation mechanism, and its operating surface has the ability to deform. In order to make the operating surface of the display device have an uneven surface (such as a concave-convex surface), the stretchable panel can be connected to a plurality of independently controllable deformation mechanisms via an adhesive layer. However, after multiple deformations, the stretchable panel is prone to peeling at the edge of the connection surface with the deformation mechanism, affecting the deformation effect of the display device. Summary of the Invention

[0003] The present invention provides a display device in which the connection relationship between the telescopic mechanism and the stretchable panel is more stable.

[0004] The display device of the present invention includes a stretchable panel, a telescopic mechanism, a first adhesive layer, and a second adhesive layer. The stretchable panel has an operating surface; the telescopic mechanism is disposed on a side of the stretchable panel opposite to the operating surface and has a receiving surface facing the stretchable panel; the telescopic mechanism is adapted to drive the stretchable panel to deform along a direction intersecting the operating surface; the first adhesive layer connects the stretchable panel and the receiving surface of the telescopic mechanism; the second adhesive layer connects the stretchable panel and the receiving surface of the telescopic mechanism; the second adhesive layer is disposed between the edge of the receiving surface and the first adhesive layer, and the Young's modulus of the second adhesive layer is greater than the Young's modulus of the first adhesive layer.

[0005] In an embodiment of the present invention, the ratio of the Young's modulus of the second adhesive layer to the Young's modulus of the first adhesive layer of the above display device is greater than or equal to 20 and less than or equal to 700.

[0006] In an embodiment of the present invention, the receiving surface of the telescopic mechanism of the above display device has a first width along any direction parallel to the receiving surface; the first adhesive layer has a second width along any direction, and the ratio of the second width to the first width is less than or equal to 0.3.

[0007] In an embodiment of the present invention, the second adhesive layer of the above display device surrounds the first adhesive layer and completely covers the portion of the receiving surface not covered by the first adhesive layer.

[0008] In an embodiment of the present invention, the above display device further includes another telescopic mechanism and an auxiliary plate; the another telescopic mechanism is disposed on a side of the stretchable panel facing away from the operation surface and is spaced apart from the telescopic mechanism; the auxiliary plate is attached to the back surface of the stretchable panel facing away from the operation surface and is located between the telescopic mechanism and the another telescopic mechanism; the edge of the respective bearing surfaces of the telescopic mechanism and the another telescopic mechanism and the auxiliary plate have a first distance in any direction parallel to the bearing surface greater than or equal to 1 mm and less than or equal to 10 mm.

[0009] In an embodiment of the present invention, the Young's modulus of the auxiliary plate of the above display device is greater than 1 GPa.

[0010] In an embodiment of the present invention, the above display device further includes a support structure disposed on a side of the stretchable panel facing away from the operation surface and having two openings overlapping the stretchable panel and support portions defining the two openings; the telescopic mechanism and the another telescopic mechanism are respectively connected to the stretchable panel via the two openings, and the auxiliary plate is disposed overlapping the support portions of the support structure.

[0011] In an embodiment of the present invention, the support portion of the above display device has a side wall defining any one of the two openings, and the auxiliary plate protrudes from the side wall of the support portion.

[0012] In an embodiment of the present invention, the auxiliary plate of the above display device has a plate edge overlapping any one of the two openings, and the second distance between the plate edge of the auxiliary plate and the side wall of the support portion in any direction is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0013] In an embodiment of the present invention, the width of the support portion of the above display device in any direction is greater than or equal to 0.5 mm and less than or equal to 10 mm.

[0014] Based on the above, in the display device according to an embodiment of the present invention, a first adhesive layer and a second adhesive layer are provided on the bearing surface of the telescopic mechanism and are connected to the stretchable panel via these two adhesive layers. Since the second adhesive layer is located between the edge of the bearing surface and the first adhesive layer and the Young's modulus of the second adhesive layer is greater than that of the first adhesive layer, the phenomenon that the stretchable panel peels off from the telescopic mechanism after multiple deformations can be effectively suppressed, which helps to improve the stability of the display device during deformation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a display device according to a first embodiment of the present invention.

[0016] Figure 2 is Figure 1 a bottom view schematic diagram of the display device.

[0017] Figure 3 isFigure 1 Schematic cross-sectional view of the display device.

[0018] Figure 4A is Figure 1 Schematic cross-sectional view of the display device when there is a local depression.

[0019] Figure 4B is Figure 1 Schematic cross-sectional view of the display device when there is a local protrusion.

[0020] Figure 5 is the schematic cross-sectional view of the display device according to the second embodiment of the present invention.

[0021] Figure 6 is the schematic cross-sectional view of the display device according to the third embodiment of the present invention.

[0022] Among them, reference numerals:

[0023] 10, 10A, 10B: Display device

[0024] 50: Central control platform

[0025] 100: Stretchable panel

[0026] 100bs: Back surface

[0027] 100s: Operating surface

[0028] 151: First adhesive layer

[0029] 151w, 200w, 310w: Width

[0030] 152: Second adhesive layer

[0031] 153: Third adhesive layer

[0032] 200: Telescopic mechanism

[0033] 200s: Bearing surface

[0034] 200se: Edge

[0035] 250: Auxiliary plate

[0036] 250e: Plate edge

[0037] 300: Support structure

[0038] 300op: Opening

[0039] 310: Support part

[0040] 310sw: Side wall

[0041] S, S’, S”, S1, S2: Spacing

[0042] t: Thickness

[0043] X, Y, Z: Directions

[0044] A - A’: Section line Detailed implementation manners

[0045] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts.

[0046] It should be understood that when a component such as a layer, film, region, or substrate is referred to as being “on” or “connected to” another component, it can be directly on or connected to the other component, or intervening components may also be present. In contrast, when a component is referred to as being “directly on” or “directly connected to” another component, no intervening components are present. As used herein, “connected” can refer to physical and / or electrical connection. Furthermore, “electrically connected” or “coupled” can mean that there are other components between two components.

[0047] As used herein, “about,” “approximate,” or “substantially” includes the stated value and an average within an acceptable deviation range of a particular value determined by one of ordinary skill in the art, taking into account the particular quantities of the measurements discussed and the errors associated with the measurements (i.e., the limitations of the measurement system). For example, “about” can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, or ±5%. Furthermore, “about,” “approximate,” or “substantially” as used herein can be selected based on optical properties, etching properties, or other properties to choose a more acceptable deviation range or standard deviation, rather than applying one standard deviation to all properties.

[0048] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and this invention, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0049] Figure 1 is a schematic diagram of a display device according to a first embodiment of the present invention. Figure 2 is Figure 1 a bottom view schematic diagram of the display device of Figure 3 is Figure 1 a cross-sectional schematic diagram of the display device of Figure 4A is Figure 1 a cross-sectional schematic diagram of the display device of when there is a local depression.Figure 4B Is Figure 1 A cross-sectional schematic view when there is a local protrusion on the display device. Figure 3 Corresponding to Figure 1 And Figure 2 The cutting line A - A'. For clear presentation, Figure 2 Only show Figure 3 The stretchable panel 100, the first adhesive layer 151 and the second adhesive layer 152 in

[0050] Please refer to Figure 1 , Figure 2 And Figure 3 , first, it should be noted that the display device 10 of this embodiment can be applied in the field of in-vehicle displays, such as the display / operation interface of the central control platform 50, but not limited thereto. In other embodiments, the display device 10 can also be applied in other devices that require a human-machine operation interface.

[0051] Specifically, the display device 10 includes a stretchable panel 100 and a plurality of telescopic mechanisms 200. The stretchable panel 100 has an operation surface 100s, and these telescopic mechanisms 200 are disposed on the side of the stretchable panel 100 opposite to the operation surface 100s. For example, in this embodiment, the stretchable panel 100 may include a plurality of island structures (not shown) having a display function or a touch function and a bridging structure (not shown) connected between these island structures. The spacing between these island structures will change as the stretchable panel 100 operates in different deformation states. The stretchable panel 100 can be a display panel, a touch panel, or a combination of the above.

[0052] For example, in this embodiment, the plurality of telescopic mechanisms 200 may be arranged at intervals along the direction X and the direction Y, where the direction X and the direction Y intersect each other and are perpendicular to the direction Z. More specifically, these telescopic mechanisms 200 are arranged and distributed in a honeycomb pattern in the normal direction (such as the direction Z) of the operation surface 100s of the stretchable panel 100. However, the present invention is not limited thereto. In other embodiments, the arrangement and distribution of these telescopic mechanisms 200 can be adjusted according to the actual application of the display device.

[0053] In this embodiment, the telescopic mechanism 200 is adapted to drive the stretchable panel 100 to deform along a direction (such as the direction Z) intersecting the operation surface 100s. More specifically, the telescopic mechanism 200 is used to drive a local part of the stretchable panel 100 to sink toward the side opposite to the operation surface 100s (as shown in Figure 4A ), or drive a local part of the stretchable panel 100 to protrude toward the side of the operation surface 100s (as shown in Figure 4B ). The aforementioned local part of the stretchable panel 100 is, for example, the part of the stretchable panel 100 connected to each telescopic mechanism 200.

[0054] To establish the connection relationship between the telescopic mechanism 200 and the stretchable panel 100, the display device 10 further includes a first adhesive layer 151 and a second adhesive layer 152. Specifically, the stretchable panel 100 further has a back surface 100bs facing away from the operation surface 100s, and the telescopic mechanism 200 has a receiving surface 200s facing the stretchable panel 100. It should be noted that the first adhesive layer 151 and the second adhesive layer 152 simultaneously connect the back surface 100bs of the stretchable panel 100 and the receiving surface 200s of the telescopic mechanism 200.

[0055] More specifically, the second adhesive layer 152 is disposed between the edge 200se of the receiving surface 200s and the first adhesive layer 151. For example, in this embodiment, the second adhesive layer 152 surrounds the first adhesive layer 151 and completely covers the portion of the receiving surface 200s not covered by the first adhesive layer 151. That is to say, the first adhesive layer 151 and the second adhesive layer 152 are juxtaposed on the receiving surface 200s of the telescopic mechanism 200, and in any direction parallel to the receiving surface 200s, the second adhesive layer 152 separates the edge 200se of the receiving surface 200s from the first adhesive layer 151.

[0056] From another perspective, the receiving surface 200s of the telescopic mechanism 200 has a width 200w in any direction (such as direction X) parallel to the receiving surface 200s, and the first adhesive layer 151 has a width 151w in the aforesaid any direction. Preferably, the ratio of the width 151w of the first adhesive layer 151 to the width 200w of the receiving surface 200s of the telescopic mechanism 200 may be less than or equal to 0.3.

[0057] It should be specifically noted that since the Young's Modulus of the second adhesive layer 152 is greater than that of the first adhesive layer 151, when the stretchable panel 100 deforms, the strain generated by the second adhesive layer 152 under force will be lower than the strain generated by the first adhesive layer 151 under force. Therefore, the stretchable panel 100 is less likely to peel off from the edge 200se of the receiving surface 200s of the telescopic mechanism 200. That is to say, the aforesaid configuration relationship between the first adhesive layer 151 and the second adhesive layer 152 and the matching design of the material properties can effectively improve the stability and tolerance of the display device 10 during the deformation operation.

[0058] Preferably, the ratio of the Young's modulus of the second adhesive layer 152 to the Young's modulus of the first adhesive layer 151 is greater than or equal to 20 and less than or equal to 700. The Young's modulus of the first adhesive layer 151 may be greater than or equal to 0.01 MPa and less than or equal to 0.1 MPa. The Young's modulus of the second adhesive layer 152 may be greater than or equal to 2 MPa and less than or equal to 7 MPa. The first adhesive layer 151 is, for example, a pressure sensitive adhesive (PSA) layer, and its material may include rubber, acrylic, silicone, or polyurethane (PU) glue. The second adhesive layer 152 is, for example, a liquid glue, and its material may include water glue, rubber, acrylic, silicone, resin, epoxy resin, hot melt glue, or silane.

[0059] Specifically, in the bonding process of the stretchable panel 100 and the telescopic mechanism 200, the pressing of the pressure sensitive adhesive (i.e., the first adhesive layer 151) can prevent misalignment and sliding between the stretchable panel 100 and the telescopic mechanism 200, thereby avoiding misalignment during subsequent processes such as coating, pressing, and heat curing of the liquid glue (i.e., the second adhesive layer 152). That is to say, the above-mentioned configuration of the first adhesive layer 151 and the second adhesive layer 152 can also improve the accuracy and yield of the bonding process of the stretchable panel 100 and the telescopic mechanism 200.

[0060] Some other embodiments will be listed below to illustrate the present disclosure in detail. The same components will be labeled with the same symbols, and the description of the same technical content will be omitted. For the omitted part, please refer to the foregoing embodiments and will not be repeated hereinafter.

[0061] Figure 5 is a cross-sectional schematic view of a display device according to a second embodiment of the present invention. Please refer to Figure 5 , compared with Figure 3 of the display device 10, the display device 10A of this embodiment may further include an auxiliary plate 250 attached to the back surface 100bs of the stretchable panel 100. It should be noted that the auxiliary plate 250 is located in the interval area between the plurality of telescopic mechanisms 200.

[0062] Preferably, the Young's modulus of the auxiliary plate 250 may be greater than 1 GPa, and its thickness t may be greater than or equal to 10 μm and less than or equal to 200 μm. The material of the auxiliary plate 250 includes, for example, polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), or stainless steel (SUS).

[0063] In this embodiment, in order to increase the protruding height of the stretchable panel 100 in a deformation such as Figure 4B the pitch S' of two adjacent telescopic mechanisms 200 along the arrangement direction (e.g., direction X) can be greater than Figure 3 the pitch S of two adjacent telescopic mechanisms 200 along the arrangement direction in

[0064] Preferably, in any direction (e.g., direction X) parallel to the receiving surface 200s, the distance S1 between the auxiliary plate 250 and the edge 200se of the receiving surface 200s can be greater than or equal to 1 mm and less than or equal to 10 mm. For example, the auxiliary plate 250 can be attached to the back surface 100bs of the stretchable panel 100 by a third adhesive layer 153, where the third adhesive layer 153 is, for example, a liquid adhesive, but is not limited thereto.

[0065] Figure 6 is a cross-sectional schematic view of a display device according to the third embodiment of the present invention. Please refer to Figure 6 Compared with the display device 10A in 5, the display device 10B of this embodiment may further include a support structure 300 disposed on the side of the stretchable panel 100 facing away from the operating surface 100s.

[0066] Specifically, the support structure 300 may have a plurality of openings 300op and support portions 310 defining these openings 300op. In the actuating direction (e.g., direction Z) of the telescopic mechanism 200, the plurality of openings 300op of the support structure 300 respectively overlap the plurality of telescopic mechanisms 200, and these telescopic mechanisms 200 are respectively connected to the stretchable panel 100 via these openings 300op.

[0067] For example, in this embodiment, the pitch S'' of any two adjacent telescopic mechanisms 200 along the arrangement direction (e.g., direction X) can be greater than Figure 5 the pitch S' of any two adjacent telescopic mechanisms 200 along the arrangement direction in

[0068] In the normal direction of the receiving surface 200s (e.g., direction Z), the auxiliary plate 250 is disposed overlapping the support portion 310 of the support structure 300. It should be particularly noted that the support portion 310 has side walls 310sw defining respective openings 300op, and the auxiliary plate 250 protrudes from the side walls 310sw of the support portion 310. From another perspective, the auxiliary plate 250 has a plate edge 250e overlapping the opening 300op along the direction Z. Preferably, in any direction parallel to the receiving surface 200s (e.g., direction X), the width 310w of the support portion 310 may be greater than or equal to 0.5 mm and less than or equal to 10 mm, and the spacing S2 between the plate edge 250e of the auxiliary plate 250 and the side walls 310sw of the support portion 310 may be greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0069] In summary, in the display device according to an embodiment of the present invention, a first adhesive layer and a second adhesive layer are provided on the receiving surface of the telescopic mechanism, and the stretchable panel can be connected via these two adhesive layers. Since the second adhesive layer is located between the edge of the receiving surface and the first adhesive layer, and the Young's modulus of the second adhesive layer is greater than that of the first adhesive layer, the phenomenon that the stretchable panel peels off from the telescopic mechanism after multiple deformations can be effectively suppressed, which helps to improve the stability of the display device during deformation operations.

Claims

1. A display device, characterized in that, Comprising: A stretchable panel having an operating surface; A telescopic mechanism disposed on a side of the stretchable panel opposite to the operating surface and having a receiving surface facing the stretchable panel, the telescopic mechanism being adapted to drive the stretchable panel to deform along a direction intersecting the operating surface; A first adhesive layer connecting the stretchable panel and the receiving surface of the telescopic mechanism; and A second adhesive layer connecting the stretchable panel and the receiving surface of the telescopic mechanism, wherein the second adhesive layer is disposed between an edge of the receiving surface and the first adhesive layer, and the Young's modulus of the second adhesive layer is greater than the Young's modulus of the first adhesive layer.

2. The display device according to claim 1, wherein The ratio of the Young's modulus of the second adhesive layer to the Young's modulus of the first adhesive layer is greater than or equal to 20 and less than or equal to 700.

3. The display device according to claim 1, wherein The receiving surface of the telescopic mechanism has a first width along any direction parallel to the receiving surface, the first adhesive layer has a second width along the any direction, and the ratio of the second width to the first width is less than or equal to 0.

3.

4. The display device according to claim 1, wherein The second adhesive layer surrounds the first adhesive layer and completely covers a portion of the receiving surface not covered by the first adhesive layer.

5. The display device according to claim 1, characterized in that, Further comprising: Another such telescopic mechanism disposed on a side of the stretchable panel opposite to the operating surface and spaced apart from the telescopic mechanism; And An auxiliary plate attached to a back surface of the stretchable panel opposite to the operating surface and located between the telescopic mechanism and the another telescopic mechanism, wherein the edges of the respective receiving surfaces of the telescopic mechanism and the another telescopic mechanism and the auxiliary plate have a first spacing along any direction parallel to the receiving surface greater than or equal to 1 mm and less than or equal to 10 mm.

6. The display device according to claim 5, wherein The Young's modulus of the auxiliary plate is greater than 1 GPa.

7. The display device according to claim 5, characterized in that, Further comprising: A support structure disposed on a side of the stretchable panel opposite to the operating surface and having two openings overlapping the stretchable panel and a support portion defining the two openings, wherein the telescopic mechanism and the another telescopic mechanism are respectively connected to the stretchable panel via the two openings, and the auxiliary plate is disposed overlapping the support portion of the support structure.

8. The display device according to claim 7, wherein The support portion has a side wall defining any one of the two openings, and the auxiliary plate protrudes from the side wall of the support portion.

9. The display device according to claim 8, wherein, The auxiliary plate has a plate edge overlapping any one of the two openings, and the plate edge of the auxiliary plate and the side wall of the support portion have a second spacing along the any direction greater than or equal to 0.5 mm and less than or equal to 5 mm.

10. The display device according to claim 7, wherein The width of the support portion along the any direction is greater than or equal to 0.5 mm and less than or equal to 10 mm.

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