Rollable electronic device

Abstract

The disclosure provides a rollable electronic device having a rollable shaft. The rollable electronic device includes a substrate layer, an insulating layer, and one or more electronic units. The insulating layer is disposed on the substrate layer and includes a plurality of first trenches. The plurality of first grooves have a first length direction parallel to the rollable shaft. The one or more electronic units are disposed on the insulating layer. In an upper view, at least one electronic unit is arranged between two adjacent first grooves in the plurality of first grooves, and the two adjacent first grooves are mutually overlapped along a direction vertical to the first length direction. The rollable electronic device disclosed by the invention can reduce the probability of cracks or damages during stretching.

Description

Technical Field

[0001] The present disclosure relates to an electronic device, and more particularly to a rollable electronic device which can reduce the probability of cracks or damage when stretched. Background Art

[0002] Electronic devices or spliced ​​electronic devices have been widely used in different fields such as communication, display, automobile or aviation. With the rapid development of electronic devices, electronic devices are developing towards being lighter and thinner, so the reliability or quality requirements of electronic devices are higher. Summary of the invention

[0003] The present disclosure provides a rollable electronic device, which can reduce the probability of cracks or damage when stretched.

[0004] According to an embodiment of the present disclosure, a rollable electronic device includes a base layer, an insulating layer, and one or more electronic units. The insulating layer is disposed on the base layer and includes a plurality of first grooves. The plurality of first grooves have a first length direction parallel to the rollable axis. The one or more electronic units are disposed on the insulating layer. In a top view, at least one electronic unit is disposed between two adjacent first grooves of the plurality of first grooves, and the two adjacent first grooves overlap each other along a direction perpendicular to the first length direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

[0006] Figure 1 Schematic top views of the rollable electronic device in different states according to the first embodiment of the present disclosure;

[0007] Figure 2 for Figure 1 Schematic cross-sectional view of a rollable electronic device in different states;

[0008] Figure 3 for Figure 1 A partial top view schematically showing a rollable region of a rollable electronic device;

[0009] Figure 4 for Figure 3 A schematic cross-sectional view of a rollable electronic device along a section line II';

[0010] Figure 5 for Figure 2 An enlarged schematic diagram of a region R1 of a flat area of ​​a rollable electronic device;

[0011] Figure 6 for Figure 2An enlarged schematic diagram of a region R2 of a foldable region of a rollable electronic device;

[0012] Figure 7 for Figure 1 A schematic top view of a support layer of a rollable electronic device in a flattened state;

[0013] Figure 8 for Figure 1 A schematic cross-sectional view of a base layer of a rollable electronic device in a flattened state;

[0014] Fig. 9 A partial top view of a rollable area of ​​a rollable electronic device according to a second embodiment of the present disclosure;

[0015] Fig.10 A partial cross-sectional schematic diagram of a rollable area of ​​a rollable electronic device according to a third embodiment of the present disclosure;

[0016] Fig.11 A partial cross-sectional schematic diagram of a rollable area of ​​a rollable electronic device according to a fourth embodiment of the present disclosure;

[0017] Fig.12 A partial cross-sectional schematic diagram of a rollable area of ​​a rollable electronic device according to a fifth embodiment of the present disclosure;

[0018] Fig.13 It is a partial cross-sectional schematic diagram of the peripheral area of ​​the rollable electronic device according to the sixth embodiment of the present disclosure.

[0019] Description of Figure Numbers

[0020] 10, 10a, 10b, 10c, 10d, 10e: rollable electronic device;

[0021] 11: bending area;

[0022] 12, 14: flat area;

[0023] 13: Foldable area;

[0024] 15: curlable area;

[0025] 100: support layer;

[0026] 100a: first surface;

[0027] 100b: second surface;

[0028] 110, 110a, 110b: second groove;

[0029] 200: basal layer;

[0030] 210: base;

[0031] 220: adhesive layer;

[0032] 230: flexible substrate;

[0033] 300: display layer;

[0034] 310: buffer layer;

[0035] 320, 320e, 362, 364: insulation layer;

[0036] 321: First floor;

[0037] 322: Second floor;

[0038] 323: The third floor;

[0039] 324, 324a, 324d, 324e: first groove;

[0040] 3241: Top;

[0041] 3242: bottom;

[0042] 3243: lateral surface;

[0043] 325: Fourth floor;

[0044] 326: Fifth floor;

[0045] 330, 330d, 335, 336: organic layer;

[0046] 332: organic part;

[0047] 340, 340', 340a, 340b, 340c: electronic unit;

[0048] 341, 341d: first electrode;

[0049] 342, 342d: light emitting element;

[0050] 343, 343d: second electrode;

[0051] 350: encapsulation layer;

[0052] 355: adhesive layer;

[0053] 360, 360c: sensing unit;

[0054] 361, 363: patterned metal layer;

[0055] 370, 370c: optical adjustment unit;

[0056] 371, 373: separation layer;

[0057] 372, 374, 375: color filter layer;

[0058] 380, 380b: optical layer;

[0059] 400: Covering layer;

[0060] 500: Circuit board;

[0061] I: folded state;

[0062] II: stretching state;

[0063] III: flattened state;

[0064] A1, A2: area;

[0065] AA: display area;

[0066] PA: peripheral area;

[0067] GE, GE', GE1': gate;

[0068] L1: first length;

[0069] L2: second length;

[0070] R1, R2: region;

[0071] RA: scrollable axis;

[0072] S1: first side;

[0073] S2: second side;

[0074] SD1, SD1': source;

[0075] SD2, SD2': drain;

[0076] SE, SE': semiconductor;

[0077] SR: minimum rectangle;

[0078] T1, T2, T3, T4: minimum thickness;

[0079] TFT, TFT1, TFT2: transistor;

[0080] W1, W3: first width;

[0081] W2: second width;

[0082] WA, WB: width;

[0083] X, Y: direction;

[0084] Y1: first length direction;

[0085] Y2: second length direction;

[0086] Z: Normal direction. DETAILED DESCRIPTION

[0087] The present disclosure can be understood by referring to the following detailed description in conjunction with the accompanying drawings. It should be noted that in order to make it easier for readers to understand and for the simplicity of the drawings, the multiple drawings in the present disclosure only depict a portion of the electronic device, and the specific elements in the drawings are not drawn according to the actual scale. In addition, the number and size of each element in the figure are only for illustration and are not intended to limit the scope of the present disclosure.

[0088] In the following description and claims, the words “including” and “comprising” are open-ended words, and thus should be interpreted as meaning “including but not limited to…”.

[0089] It should be understood that when an element or a film layer is referred to as being "on" or "connected to" another element or film layer, it may be directly on or directly connected to the other element or layer, or there may be an intervening element or film layer between the two (indirect case). Conversely, when an element is referred to as being "directly on" or "directly connected to" another element or film layer, there may be no intervening element or film layer between the two.

[0090] Although the terms "first", "second", "third" ... can be used to describe a variety of components, the components are not limited to these terms. These terms are only used to distinguish a single component from other components in the specification. The same terms may not be used in the claims, but may be replaced by first, second, third ... according to the order of the components declared in the claims. Therefore, in the following description, the first component may be the second component in the claims.

[0091] In the text, the terms "about", "approximately", "substantially", and "roughly" generally mean within 10%, within 5%, within 3%, within 2%, within 1%, or within 0.5% of a given value or range. The numbers given here are approximate numbers, that is, in the absence of specific descriptions of "about", "approximately", "substantially", and "roughly", the meanings of "about", "approximately", "substantially", and "roughly" can still be implied.

[0092] In some embodiments of the present disclosure, terms such as "connection" and "interconnection" may refer to two structures being in direct contact, or two structures not being in direct contact, with other structures disposed between the two structures, unless otherwise specified. Such terms may also include situations where both structures are movable or both structures are fixed. In addition, the term "coupling" includes any direct and indirect electrical connection means.

[0093] In some embodiments of the present disclosure, an optical microscope (OM), a scanning electron microscope (SEM), an α-step, an ellipsometer, or other suitable methods may be used to measure the area, width, thickness, or height of each element, or the distance or spacing between elements. Specifically, according to some embodiments, a scanning electron microscope may be used to obtain a cross-sectional structural image including the element to be measured, and the area, width, thickness, or height of each element, or the distance or spacing between elements may be measured.

[0094] The electronic device disclosed herein may include a display device, an antenna device, a communication device, a sensing device or a splicing device, but is not limited thereto. The electronic device may be a bendable or flexible electronic device. The electronic device may, for example, include a liquid crystal light emitting diode; the light emitting diode may, for example, include an organic light emitting diode (OLED), a sub-millimeter light emitting diode (mini LED), a micro LED or a quantum dot light emitting diode (QD, which may be, for example, QLED, QDLED), fluorescence, phosphorescence or other suitable materials, and the materials may be arranged and combined in any manner, but is not limited thereto. The antenna device may, for example, be a phased array antenna, but is not limited thereto. The splicing device may, for example, be a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that the electronic device may be any arrangement or combination of the aforementioned, but is not limited thereto. The following will illustrate the contents of the disclosure using an electronic device, but the disclosure is not limited thereto.

[0095] It should be noted that the following embodiments may replace, reorganize, or mix features in several different embodiments to complete other embodiments without departing from the spirit of the present disclosure. Features between embodiments may be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

[0096] Reference will now be made in detail to exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0097] Figure 1 Schematic top views of the rollable electronic device in different states according to the first embodiment of the present disclosure. Figure 2 for Figure 1 Schematic cross-sectional view of a rollable electronic device in different states. Figure 3 for Figure 1 A partial top view of a rollable area of ​​a rollable electronic device. Figure 4 for Figure 3 A schematic cross-sectional view of a rollable electronic device along the section line AA'. Figure 5 for Figure 2 An enlarged schematic diagram of a region R1 of a flat area of ​​a rollable electronic device. Figure 6 for Figure 2 An enlarged schematic diagram of a region R2 of the foldable area of ​​the rollable electronic device. Figure 7 for Figure 1 Schematic diagram of a top view of a support layer of a rollable electronic device in a flattened state. Figure 8 for Figure 1 A cross-sectional schematic diagram of a base layer of a rollable electronic device in a flattened state. For the sake of clarity and convenience of description, Figure 1 , Figure 2 , Figure 3 and Figure 7 Several elements in the rollable electronic device are omitted from illustration.

[0098] Please refer to Figure 1 The rollable electronic device 10 of this embodiment has a display area AA and a peripheral area PA adjacent to the display area AA. The display area AA has a first side S1 and a second side S2 opposite to each other, and the first side S1 and the second side S2 are parallel to the direction X respectively.

[0099] Please refer to Figure 1 and Figure 2 , the rollable electronic device 10 of this embodiment can have different states, including a folded state (or unstretched state) I, a stretched state II, and a flattened state (or stretched state) III. In this embodiment, the rollable electronic device 10 can change its state through a rollable axis RA. The rollable axis RA refers to an axis that can be rolled up or rolled up, so that the rollable electronic device 10 can change its shape or size; or the rollable axis RA refers to the axis around which an object rolls. The rollable axis RA can extend along the direction Y.

[0100] Specifically, in the flattened state III, the rollable electronic device 10 may include a bending region 11 , a flat region 12 , a foldable region 13 , a flat region 14 and a rollable region 15 in sequence along the stretching direction X thereof.

[0101] When the rollable electronic device 10 is in the folded state I, in the normal direction Z of the rollable electronic device 10, the bending area 11 may be close to and overlap the rollable area 15, the flat area 12 may be close to and overlap the flat area 14, and the flat area 14 may overlap the rollable area 15. In addition, in the folded state I of the rollable electronic device 10, the curvature radius of the foldable area 13 may be smaller than the curvature radius of the rollable area 15, and the curvature radius of the bending area 11 may be smaller than the curvature radius of the foldable area 13. This curvature radius design can make the stress of the panel in different areas within the tolerable range, thereby improving the tolerance of the panel during use, but is not limited thereto. Among them, the folded state I refers to a state in which two parts are parallel to each other, or refers to the final state of the rollable electronic device 10 after being folded by the user (or a state in which it cannot be further bent); the curvature radius can be calculated / measured when the rollable electronic device 10 is in the folded state I or can be obtained according to the specification of the rollable electronic device 10.

[0102] When the rollable axis RA moves along the stretching direction X to make the rollable electronic device 10 in the stretching state II, in the normal direction Z of the rollable electronic device 10 , the bending area 11 may not overlap the rollable area 15 , and the flat area 14 may gradually not overlap the rollable area 15 .

[0103] When the rollable axis RA continues to move along the stretching direction X and the rollable electronic device 10 is in the flattened state III, in the normal direction Z of the rollable electronic device 10, the bending area 11 may be away from the rollable area 15, the flat area 12 may be away from the flat area 14, and the bending area 11, the flat area 12, the foldable area 13, the flat area 14 and the rollable area 15 may not overlap with each other. In addition, in the flattened state III of the rollable electronic device 10, the foldable area 13 may be closer to the bending area 11 than the rollable area 15, and the bending area 11 and the rollable area 15 may be located at opposite sides of the rollable electronic device 10 respectively; wherein, since the rollable area 15 is farther away from the bending area 11, the bending area 11 may be avoided from being pulled when the rollable electronic device 10 is rolled, which may reduce the risk of abnormal signal input and the difficulty of the assembly process.

[0104] In this embodiment, when the rollable electronic device 10 is in the flattened state III, the width WA of the foldable area 13 may be smaller than the width WB of the rollable area 15, but is not limited thereto. The width WA may be the width of the foldable area 13 measured along the direction X, and the width WB may be the width of the rollable area 15 measured along the direction X. This design can keep the stress of the panel in different areas within an acceptable range, thereby improving the tolerance of the panel during use.

[0105] In this embodiment, during the conversion of the rollable electronic device 10 between different states (including the folded state I, the stretched state II, and the flattened state III), the bending area 11 is bendable and fixed and does not slide, the flat area 12 and the flat area 14 are not bendable and do not slide, the foldable area 13 is bendable and does not slide, and the rollable area 15 is bendable and can slide.

[0106] In the present embodiment, the direction X, the direction Y, and the normal direction Z are different directions. The direction X is, for example, the moving direction of the scrollable axis RA or the stretching direction of the rollable electronic device 10, and the direction Y is, for example, the extending direction of the scrollable axis RA. The direction X may be substantially perpendicular to the direction Y, and the normal direction Z may be substantially perpendicular to the direction X and the direction Y, respectively. In the present embodiment, "perpendicular" means that the angle between the two directions may be between 80 degrees and 100 degrees, and "parallel" means that the angle between the two directions may be between 0 degrees and 10 degrees.

[0107] Please continue to refer to Figure 2 The rollable electronic device 10 of this embodiment may include a support layer 100, a base layer 200, a display layer 300, a cover layer 400, and a circuit board 500. The support layer 100 has a first surface 100a and a second surface 100b opposite to each other. A portion of the base layer 200 is disposed on the first surface 100a, and another portion of the base layer 200 is bent downward and disposed under the second surface 100b. The display layer 300 is disposed on the base layer 200. The cover layer 400 is disposed on the display layer 300. The circuit board 500 is disposed under another portion of the base layer 200.

[0108] Please refer to Figures 3 to 6 The display layer 300 is disposed in the flat area 12, the foldable area 13, the flat area 14, and the rollable area 15. The display layer 300 may include a buffer layer 310, an insulating layer 320, a transistor TFT, an organic layer 330, a plurality of electronic units 340, an encapsulation layer 350, a sensing unit 360, an optical adjustment unit 370, and an optical layer 380.

[0109] Please refer to Figures 4 to 6The buffer layer 310 is disposed on the base layer 200. The buffer layer 310 may be a single-layer structure or a multi-layer structure, and the material of the buffer layer 310 may include an organic material, an inorganic material, or a combination thereof, but is not limited thereto.

[0110] Please refer to Figures 4 to 6 , the insulating layer 320 is disposed on the base layer 200 and the buffer layer 310. In the present embodiment, the material of the insulating layer 320 may include an organic material, an inorganic material or a combination thereof, but is not limited thereto. The insulating layer 320 includes a first layer 321, a second layer 322, a third layer 323 and a plurality of first grooves 324. The first layer 321 is disposed on the buffer layer 310, the second layer 322 is disposed on the first layer 321, and the third layer 323 is disposed on the second layer 322. The first groove 324 may be disposed between two adjacent electronic units 340 (or transistors TFT), but is not limited thereto. The first groove 324 may penetrate the first layer 321, the second layer 322 and the third layer 323, and the first groove 324 may expose part of the buffer layer 310, but is not limited thereto. The first groove 324 has a top 3241, a bottom 3242 and a side surface 3243 that are opposite to each other. The bottom 3242 is closer to the base layer 200 than the top 3241, and the side surface 3243 connects the top 3241 and the bottom 3242. In addition, in some embodiments not shown, in addition to penetrating the first layer 321, the second layer 322 and the third layer 323 of the insulating layer 320, the first groove may also penetrate the buffer layer 310 to expose a portion of the base layer 200.

[0111] Please refer to Figure 3 , the plurality of first grooves 324 may extend from the first side S1 of the display area AA to the second side S2. The contour shape of the plurality of first grooves 324 may be a long strip, but is not limited thereto. The plurality of first grooves 324 have a first length direction Y1, the first length direction Y1 may be parallel to the extension direction (direction Y) of the scrollable axis RA, and the first length direction Y1 may be perpendicular to the direction X. Two adjacent first grooves 324 may overlap each other along the direction X perpendicular to the first length direction Y1. In this embodiment, "longitudinal direction" refers to a direction along or parallel to the long axis of an object; "long axis" refers to a straight line extending longitudinally through an object; for an elongated or elliptical object, the long axis is closest to its maximum longitudinal dimension; for an object without a clear long axis, the long axis may represent the long axis of the smallest rectangle that can surround the object.

[0112] In the present embodiment, since the first length direction Y1 of the plurality of first grooves 324 may be parallel to the extension direction (direction Y) of the scrollable axis RA and perpendicular to the direction X (the moving direction of the scrollable axis RA or the stretching direction of the rollable electronic device 10), and two adjacent first grooves 324 may overlap each other in the direction X, the probability of cracks or damage to the rollable electronic device 10 when stretched can be reduced. On the contrary, if the first length direction of the first groove is parallel to the moving direction of the scrollable axis (or the stretching direction of the rollable electronic device), or if two adjacent first grooves do not overlap each other in the moving direction of the scrollable axis (or the stretching direction of the rollable electronic device), the rollable electronic device may be prone to cracks or damage when stretched, and the cracks may easily extend from the non-overlapping area along the stretching direction, resulting in a larger range of crack damage. Designing at least two adjacent overlapping grooves can greatly reduce cracks and crack enlargement.

[0113] Please refer to Figure 3 At least one of the plurality of first trenches 324 has a first length L1 and a first width W1. Figure 3 In the top view, the first length L1 may be, for example, the maximum length of the smallest rectangle surrounding the first groove 324 measured along the direction Y parallel to the long axis direction, and the first width W1 may be, for example, the maximum width of the smallest rectangle surrounding the first groove 324 measured along the direction X perpendicular to the long axis direction.

[0114] In the present embodiment, the first length L1 of the first groove 324 may be greater than or equal to 0.1 mm and less than or equal to 100,000 mm, greater than or equal to 1 mm and less than or equal to 10,000 mm, greater than or equal to 10 mm and less than or equal to 1000 mm, but not limited thereto. When the first length L1 is too small (i.e., the first groove 324 does not extend from the first side S1 of the display area AA to the second side S2), a portion of the rollable electronic device 10 may be at risk of cracking when stretched. When the first length L1 is too large (i.e., the first groove 324 in the display area AA extends beyond the first side S1 and / or the second side S2), the layout space of the wiring of the peripheral area PA may be affected.

[0115] In the present embodiment, the first width W1 of the first groove 324 may be greater than or equal to 0.01 micrometers (μm) and less than or equal to 1000 micrometers, greater than or equal to 0.1 micrometers (μm) and less than or equal to 100 micrometers, greater than or equal to 0.5 micrometers (μm) and less than or equal to 10 micrometers, but not limited thereto. When the first width W1 is too small, it will be difficult to form the first groove by etching. When the first width W1 is too large, it will affect the layout space of the wiring in the display area AA or affect the flatness of the layer above the insulating layer 320.

[0116] In this embodiment, the first length L1 and the first width W1 of the first trench 324 may satisfy the following equation: 1×10 3 <L1 / W1<1×10 7 , in order to reduce the probability of cracks in the rollable electronic device 10 when stretched or to maximize the layout space of the wiring in the display area AA, but not limited thereto. In this embodiment, the first length L1 and the first width W1 of the first groove 324 can satisfy the following equation: 1×10 3 μm 2 <L1×W1<1×10 7 μm 2 , so as to reduce the probability of cracks occurring in the rollable electronic device 10 when stretched or to maximize the layout space of the wiring in the display area AA, but not limited thereto.

[0117] Please refer to Figures 4 to 6 In this embodiment, the first groove 324 can be arranged at Figure 4 The rollable area 15 ( Figure 4 Schematically showing four first grooves 324, but not limited thereto) and Figure 6 The foldable area 13 ( Figure 6 A first groove 324 is schematically shown, but not limited thereto), and the first groove 324 is not provided in Figure 5The flat area 14 (or flat area 12) shown in the figure is not limited thereto. In some embodiments, the first grooves 324 may also be provided in the rollable area 15, the foldable area 13 and the flat area 14 (or flat area 12) at the same time, as long as the relationship between the number, density or area of ​​the first grooves 324 in different areas can satisfy the following conditions: the number of the plurality of first grooves 324 in the rollable area 15 may be greater than the number of the plurality of first grooves 324 in the foldable area 13, and / or the density of the plurality of first grooves 324 in the rollable area 15 may be greater than the density of the plurality of first grooves 324 in the foldable area 13; In addition, when the flat area 14 (or the flat area 12) is provided with first grooves, the number of the plurality of first grooves 324 in the rollable area 15 may be greater than the number of the plurality of first grooves in the flat area 14 (or the flat area 12), the density of the plurality of first grooves 324 in the rollable area 15 may be greater than the density of the plurality of first grooves in the flat area 14 (or the flat area 12), and / or the area of ​​one of the plurality of first grooves 324 in the rollable area 15 may be greater than the area of ​​another of the plurality of first grooves in the flat area 14 (or the flat area 12). In this embodiment, "density" refers to the degree of density. For example, density refers to the value calculated by taking a fixed area in a region as the denominator and the sum of the areas of all the first grooves in the fixed area as the numerator, wherein the size of the fixed area between different regions is the same. This design can design different groove numbers / densities for the stress distribution corresponding to the stress of the panel in different regions, so that the panel is within an acceptable range, thereby improving the tolerance of the panel during use.

[0118] The transistor TFT is disposed in the insulating layer 320. The transistor TFT may include a gate GE, a source SD1, a drain SD2, and a semiconductor SE. The semiconductor SE is disposed on the buffer layer 310, the gate GE is disposed on the first layer 321, and the source SD1 and the drain SD2 are disposed on the second layer 322. The transistor TFT may be electrically connected to the electronic unit 340.

[0119] In the present embodiment, the material of the semiconductor SE may be low temperature polycrystalline oxide (LTPO), but is not limited thereto. In some embodiments, the material of the semiconductor may also include amorphous silicon (a-Si), polycrystalline silicon (e.g., low temperature polycrystalline silicon (LTPS)), low temperature polycrystalline oxide (LTPO), germanium, compound semiconductors (e.g., gallium nitride, silicon carbide, gallium arsenide, gallium phosphide, indium phosphide, indium arsenide and / or indium antimonide), alloy semiconductors (e.g., SiGe alloys, GaAsP alloys, AlInAs alloys, AlGaAs alloys, GaInAs alloys, GaInP alloys, GaInAsP alloys), metal oxides (e.g., indium gallium zinc oxide (IGZO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZTO)), organic semiconductors containing polycyclic aromatic compounds, or combinations thereof.

[0120] In this embodiment, the state of the transistor TFT may be a top gate structure, but is not limited thereto. In some embodiments, the state of the transistor TFT may also include a top gate structure and a double gate structure including a top gate structure and a bottom gate structure, wherein the first trench may be disposed between transistors TFT of different states, for example, between the top gate structure and the double gate structure, thereby reducing the risk of cracking caused by stress mismatch between transistors TFT of different materials and different states.

[0121] The organic layer 330 is disposed on the insulating layer 320 and in the first groove 324. The organic layer 330 may be a single-layer structure or a multi-layer structure, and the material of the organic layer 330 may include an organic material, but is not limited thereto. The organic layer 330 may include an organic portion 332 disposed in the first groove 324, and the organic portion 332 may be a portion of the entire organic layer 330, but is not limited thereto. In some embodiments, the organic portion may also be an organic material different from the organic layer 330, and is independently filled piece by piece into at least one of the plurality of first grooves. In this embodiment, the filling of the organic layer may improve the stability of the groove, so that the subsequent stacking is not easy to collapse.

[0122] A plurality of electronic units 340 (including electronic unit 340a, electronic unit 340b, and electronic unit 340c) are disposed on the insulating layer 320. In the top view, at least one electronic unit 340 (electronic unit 340a, electronic unit 340b, or electronic unit 340c) may be disposed between two adjacent first grooves 324 among the plurality of first grooves 324 to reduce stress between the electronic units. In this embodiment, "adjacent" means that there are no other identical components between the two identical components.

[0123] In the present embodiment, when the electronic unit 340 may be a light emitting diode, the electronic unit 340 may include a first electrode 341, a light emitting element 342, and a second electrode 343. The first electrode 341 is disposed on the insulating layer 320 and electrically connected to the light emitting element 342. The light emitting element 342 is disposed on the first electrode 341. The second electrode 343 is disposed on the light emitting element 342 and electrically connected to the light emitting element 342. The electronic unit 340 may be electrically connected to the drain SD2 of the transistor TFT through the first electrode 341.

[0124] In the present embodiment, the electronic unit 340a, the electronic unit 340b, and the electronic unit 340c in the electronic unit 340 may be, for example, light emitting diodes that can emit different colors, but are not limited thereto. For example, the electronic unit 340a may be a red light emitting diode, the electronic unit 340b may be a green light emitting diode, and the electronic unit 340c may be a blue light emitting diode, but are not limited thereto. Although the electronic unit 340 in the present embodiment may be a light emitting diode, the present disclosure does not limit the type of the electronic unit 340. In some embodiments, the electronic unit may also include a passive element or an active element, such as a capacitor, a resistor, an inductor, a diode (including a photodiode or a varactor diode), a transistor, etc., but are not limited thereto.

[0125] The encapsulation layer 350 is disposed on the electronic unit 340 and may cover a portion of the organic layer 330. The encapsulation layer 350 may be a single layer structure or a multi-layer structure, and the material of the encapsulation layer 350 may include organic material, inorganic material or a combination thereof, but is not limited thereto.

[0126] The sensing unit 360 is disposed on the encapsulation layer 350. The sensing unit 360 may include a patterned metal layer 361, an insulating layer 362, a patterned metal layer 363, and an insulating layer 364. The patterned metal layer 361 is disposed on the encapsulation layer 350, the insulating layer 362 is disposed on the patterned metal layer 361, the patterned metal layer 363 is disposed on the insulating layer 362, and the insulating layer 364 is disposed on the patterned metal layer 363. In the present embodiment, the sensing unit 360 may include touch sensing, biosensing, distance sensing, and electromagnetic wave sensing, but is not limited thereto. In addition, touch sensing may be used, for example, to sense the touch of a finger, a pen, or an external object. In some embodiments, the rollable electronic device may further include other sensing units (not shown) in addition to the sensing unit 360, wherein the other sensing units may be disposed between the base layer 200 and the support layer 100, or disposed under the support layer 100.

[0127] The optical adjustment unit 370 is disposed on the sensing unit 360. The optical adjustment unit 370 may include a separation layer 371, a color filter layer 372, and a separation layer 373. The separation layer 371 and the color filter layer 372 are respectively disposed on the sensing unit 360. In the normal direction Z of the rollable electronic device 10, the separation layer 371 may not overlap the corresponding electronic unit 340, and the color filter layer 372 may overlap the corresponding electronic unit 340. The separation layer 373 is disposed on the separation layer 371, and the separation layer 373 may overlap the corresponding separation layer 371 in the normal direction Z of the rollable electronic device 10. In the present embodiment, the optical adjustment unit 370 may include, for example, a color filter material, a quantum dot material, or other materials that can adjust the spectrum of the light-emitting unit, but is not limited thereto. In the present embodiment, the separation layer 373 may be a light-shielding material. For example, the separation layer 373 may be, for example, a black matrix layer (BM), but is not limited thereto.

[0128] The optical layer 380 is disposed on the optical adjustment unit 370. The optical layer 380 may include an anti-reflection layer, a polarizing layer, or a combination thereof, but is not limited thereto.

[0129] The optical adjustment unit 370 may have an optical design that is adjusted for different electronic units respectively; the optical layer 380 may have an optical design that is adjusted as a whole.

[0130] Please refer to Figure 2 as well as Figures 4 to 6 The support layer 100 is disposed in the flat area 12, the foldable area 13, the flat area 14 and the rollable area 15, and the support layer 100 is not disposed in the bending area 11. The support layer 100 may be disposed under the base layer 200.

[0131] Please refer to Figure 7, the support layer 100 may include a plurality of second grooves 110. In the present embodiment, the second grooves 110 may be disposed in the foldable area 13 and the rollable area 15, and the second grooves 110 are not disposed in the flat area 12 and the flat area 14, but the invention is not limited thereto. The second grooves 110 may penetrate the support layer 100. The plurality of second grooves 110 have a second length direction Y2, the second length direction Y2 may be parallel to the first length direction Y1 and the direction Y, and the second length direction Y2 may be perpendicular to the direction X. This direction design may have both support and flexibility.

[0132] In this embodiment, one of the plurality of first grooves 324 may overlap a portion of the second grooves 110 of the plurality of second grooves 110, so that the rollable electronic device 10 can release stress when stretched, thereby reducing the probability of cracks or damage to the rollable electronic device 10 when stretched. In some embodiments, one of the plurality of first grooves 324 may overlap two or more of the plurality of second grooves 110.

[0133] In this embodiment, since the second length direction Y2 of the plurality of second grooves 110 may be parallel to the first length direction Y1 and perpendicular to the direction X (the moving direction of the rollable axis RA or the stretching direction of the rollable electronic device 10), and a portion of the plurality of second grooves 110 may overlap the first groove 324, the probability of cracks or damage to the rollable electronic device 10 when stretched can be reduced, and the probability of deformation of the support layer 100 can be reduced. On the contrary, if the second length direction of the second grooves is parallel to the moving direction of the rollable axis (or the stretching direction of the rollable electronic device), the rollable electronic device may be easily cracked or damaged when stretched, and the support layer may be easily deformed.

[0134] In this embodiment, at least one second trench 110 among the plurality of second trenches 110 has a second length L2 and a second width W2. Figure 7 In the top view, the second length L2 may, for example, be the maximum length of the smallest rectangle surrounding the second groove 110 measured along the direction Y parallel to the long axis direction, and the second width W2 may, for example, be the maximum width of the smallest rectangle surrounding the second groove 110 measured along the direction X perpendicular to the long axis direction.

[0135] In this embodiment, the second length L2 of the second groove 110 may be greater than or equal to 1 mm and less than or equal to 10 mm, but is not limited thereto. When the second length L2 is less than 1 mm, the flexibility of the support layer 100 may be insufficient. When the second length L2 is greater than 10 mm, the support layer 100 may be easily deformed.

[0136] In this embodiment, the second width W2 of the second groove 110 may be greater than or equal to 100 microns and less than or equal to 300 microns, but is not limited thereto. When the second width W2 is less than 100 microns, the flexibility of the support layer 100 will be insufficient. When the second width W2 is greater than 300 microns, the support layer 100 will be prone to deformation.

[0137] In this embodiment, the second length L2 and the second width W2 of the second groove 110 may satisfy the following equation: 3 < L2 / W2 < 100, so that the support layer 100 can provide better flexibility and support at the same time, but is not limited thereto. In this embodiment, the second length L2 and the second width W2 of the second groove 110 may satisfy the following equation: 1×10 5 μm 2 < L2×W2 < 3×10 6 μm 2 so that the support layer 100 can provide better flexibility and support at the same time, but is not limited thereto.

[0138] In this embodiment, the first length L1 of the first groove 324 and the second length L2 of the second groove 110 may satisfy the following equation: L1 > L2, and / or 1 < L1 / L2 ≤ 1000, but is not limited thereto. In this embodiment, the first width W1 of the first groove 324 and the second width W2 of the second groove 110 may satisfy the following equation: W2 > W1, and / or 10 ≤ W2 / W1 ≤ 3000, but is not limited thereto. In this embodiment, the first length L1 of the first groove 324, the first width W1 of the first groove 324, the second length L2 of the second groove 110, and the second width W2 of the second groove 110 may satisfy the following equation: 10 ≤ (L1 / W1) / (L2 / W2) ≤ 3×10 6 , but is not limited thereto. The dimensions of the first groove and the second groove conform to the above relationship, which can reduce the stress of the overall device and improve the reliability.

[0139] Please refer to Figure 7 , in this embodiment, the area A1 of one second groove 110a among the plurality of second grooves 110 in the foldable region 13 may be different from the area A2 of another second groove 110b among the plurality of second grooves 110 in the rollable region 15. In this embodiment, the area A1 of one second groove 110a among the plurality of second grooves 110 in the foldable region 13 may be greater than the area A2 of another second groove 110b among the plurality of second grooves 110 in the rollable region 15, but is not limited thereto. The groove design of this support plate can optimize the support and flexibility, so that the reliability of the device can be improved during multiple bending and curling.

[0140] Please refer to Figure 8, the base layer 200 may include a base 210, an adhesive layer 220, and a flexible substrate 230. The base 210 is disposed on the support layer 100, the adhesive layer 220 is disposed on the base 210, and the flexible substrate 230 is disposed on the adhesive layer 220. In this embodiment, the material of the base 210 may include polyimide (PI), polyethylene terephthalate (PET), other suitable base materials, or a combination of the foregoing, but is not limited thereto. The material of the flexible substrate 230 may include polyimide / silicon oxide / polyimide, other suitable flexible substrate materials, or a combination of the foregoing, but is not limited thereto.

[0141] In this embodiment, the base layer 200 may be disposed in the bending region 11, the flat region 12, the foldable region 13, the flat region 14, and the rollable region 15. The base layer 200 in the bending region 11 has a minimum thickness T1, the base layer 200 in the flat regions 12 and 14 has a minimum thickness T2, the base layer 200 in the foldable region 13 has a minimum thickness T3, and the base layer 200 in the rollable region 15 has a minimum thickness T4. In this embodiment, the minimum thickness T2 may be greater than the minimum thickness T4, the minimum thickness T4 may be greater than the minimum thickness T3, and the minimum thickness T3 may be greater than the minimum thickness T1 (i.e., T1 < T3 < T4 < T2). With this design, after the entire rollable electronic device 10 is subjected to multiple curling and bending, the substrates can be less likely to separate from each other (for example, the flexible substrate 230 and the base 210), and unnecessary deformation will not occur due to stress, thereby improving the reliability, but is not limited thereto. Among them, the minimum thickness T1, the minimum thickness T2, the minimum thickness T3, and the minimum thickness T4 may be the minimum thicknesses measured along the direction Y in the bending region 11, the flat region 12 (or the flat region 14), the foldable region 13, and the rollable region 15, respectively.

[0142] Other embodiments will be listed below for illustration. It must be noted here that the following embodiments follow the element numbers and some contents of the foregoing embodiments, where the same numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

[0143] Fig. 9 A partial top view schematic diagram of the rollable region of the rollable electronic device according to the second embodiment of the present disclosure. Please refer to Figure 3 and Fig. 9 , the rollable electronic device 10a of this embodiment and Figure 3The rollable electronic device 10a of the present embodiment is similar to the rollable electronic device 10 in the present embodiment, but the difference between the two is that in the rollable electronic device 10a of the present embodiment, the contour shape of the plurality of first grooves 324a can be S-shaped to enhance the utilization flexibility of the layout space.

[0144] Specifically, please refer to Fig. 9 At least one first trench 324a among the plurality of first trenches 324a has a first length L1 and a first width W3. Fig. 9 In the top view, the first length L1 may, for example, be the maximum length of the minimum rectangle SR surrounding the first groove 324a measured along the direction Y parallel to the long axis direction, and the first width W3 may, for example, be the maximum width of the minimum rectangle SR surrounding the first groove 324a measured along the direction X perpendicular to the long axis direction.

[0145] Fig.10 This is a partial cross-sectional diagram of the rollable area of ​​the rollable electronic device of the third embodiment of the present disclosure. Figure 4 and Fig.10 The rollable electronic device 10b of this embodiment is Figure 4 The rollable electronic device 10 is similar to the rollable electronic device 10 in the embodiment, but the difference between the two is that: in the rollable electronic device 10b of the present embodiment, it is not necessary to set the rollable electronic device 10b as required. Figure 4 The color filter layer 372 and the separation layer 373 are shown in FIG.

[0146] Specifically, please refer to Fig.10 The separation layer 371 is disposed on the sensing unit 360 , and the separation layer 371 may not overlap the corresponding electronic unit 340 in the normal direction Z of the rollable electronic device 10 b . The optical layer 380 b is disposed on the separation layer 371 , and the optical layer 380 b may cover a portion of the sensing unit 360 .

[0147] Fig.11 This is a partial cross-sectional diagram of the rollable area of ​​the rollable electronic device of the fourth embodiment of the present disclosure. Figure 4 and Fig.11 The rollable electronic device 10c of this embodiment is Figure 4 The rollable electronic device 10 is similar to the rollable electronic device 10 in the embodiment, but the difference between the two is that: in the rollable electronic device 10c of the present embodiment, different Figure 4 The sensing unit 360c of the sensing method of the sensing unit 360 can be set differently according to the needs. Figure 4 The optical adjustment unit 370 (including the partition layer 371, the color filter layer 372 and the partition layer 373) is an optical adjustment unit 370c.

[0148] Specifically, please refer to Fig.11In this embodiment, the optical adjustment unit 370c may include a color filter layer 372, a color filter layer 374, and a color filter layer 375. In the normal direction Z of the rollable electronic device 10c, the overlapping portion of at least two of the color filter layers 372, the color filter layer 374, and the color filter layer 375 may be regarded as a shielding structure and have a shielding effect.

[0149] Fig.12 This is a partial cross-sectional diagram of the rollable area of ​​the rollable electronic device of the fifth embodiment of the present disclosure. Fig.11 and Fig.12 The rollable electronic device 10d of this embodiment is Fig.11 The rollable electronic device 10c is similar to the rollable electronic device 10d in the embodiment, but the difference between the two is that: in the rollable electronic device 10d of the present embodiment, one first groove 324 or a plurality of first grooves 324d ( Fig.12 Two are schematically shown, but not limited thereto); the display layer 300 may further include an organic layer 335 and an adhesive layer 355; and the light emitting element 342d that has been manufactured is used to replace Fig.11 The light emitting element 342 is provided.

[0150] Specifically, please refer to Fig.12 For example, two first grooves 324d may be provided between the electronic unit 340a and the electronic unit 340b in the electronic unit 340', and one first groove 324 may be provided between the electronic unit 340b and the electronic unit 340c, and the width of the first groove 324d is different from the width of the first groove 324, but is not limited thereto.

[0151] The organic layer 335 may be disposed on the insulating layer 320 and in the plurality of first trenches 324d. The organic layer 330d may be disposed on the organic layer 335. The electronic unit 340' may be disposed in an opening of the organic layer 330d exposing the organic layer 335.

[0152] In the present embodiment, the electronic unit 340' may be a micro light emitting diode, but is not limited thereto. The electronic unit 340' may include a first electrode 341d, a light emitting element 342d, and a second electrode 343d. In the present embodiment, the first electrode 341d and the second electrode 343d are disposed on the organic layer 335. The light emitting element 342d is disposed on the first electrode 341d and the second electrode 343d. The electronic unit 340' may be electrically connected to the drain SD2 of the transistor TFT through the first electrode 341d.

[0153] In addition, unlike Fig.11The light emitting element 342 is directly manufactured on the first electrode 341 . In this embodiment, the light emitting element 342 d that has been manufactured is transferred and bonded to the first electrode 341 d and the second electrode 343 d by an indirect transfer method.

[0154] The adhesive layer 355 may be disposed on the organic layer 330d and the plurality of electronic units 340 ′, and the adhesive layer 355 may cover the organic layer 330d and fill in the opening of the organic layer 330d that exposes the organic layer 335 . The encapsulation layer 350 may be disposed on the adhesive layer 355 .

[0155] Fig.13 This is a partial cross-sectional diagram of the peripheral area of ​​the rollable electronic device according to the sixth embodiment of the present disclosure. Fig.12 and Fig.13 The rollable electronic device 10e of this embodiment is Fig.12 The rollable electronic device 10e of the present embodiment is similar to the rollable electronic device 10d, but the difference between the two is that: in the rollable electronic device 10e of the present embodiment, the peripheral area PA (or the bending area 11) may be provided with a first groove 324e and a transistor TFT1 having a top gate structure; the display area AA may be provided with a transistor TFT2 having a double gate structure; the insulating layer 320e also includes a fourth layer 325 and a fifth layer 326; the rollable electronic device 10e may also include an optical adjustment unit 370 and an organic layer 336.

[0156] Specifically, please refer to Fig.13 The optical adjustment unit 370 is disposed on the sensing unit 360 . The organic layer 336 is disposed between the organic layer 330 d and the organic layer 335 . The fourth layer 325 is disposed on the third layer 323 , and the fifth layer 326 is disposed on the fourth layer 325 .

[0157] The transistor TFT2 may include a gate GE', a source SD1', a drain SD2', a semiconductor SE' and a gate GE1'. The gate GE1' is disposed on the second layer 322, the semiconductor SE' is disposed on the fourth layer 325, the gate GE' is disposed on the fifth layer 326, and the source SD1' and the drain SD2' are disposed on the organic layer 335.

[0158] In this embodiment, one or more first trenches 324e may be provided between two adjacent transistors. For example, two first trenches 324e may be provided between two adjacent transistors TFT1 in the peripheral area PA, and one first trench 324e may be provided between two adjacent transistors in the display area AA and the peripheral area PA (for example, between transistor TFT2 and transistor TFT), but the present invention is not limited thereto.

[0159] In this embodiment, by providing a first groove 324e in the peripheral area PA (for example, the first groove 324e between two adjacent transistors TFT1 in the peripheral area PA), the damage to the circuit in the peripheral area PA due to the curling process (or stretching process) of the rollable electronic device 10d can be further reduced, so that the rollable electronic device 10d can still have better reliability after multiple stretchings.

[0160] In this embodiment, when there is enough space, the stress can be reduced more effectively by providing a plurality of first trenches (eg, two first trenches 324 e between two adjacent transistors TFT1 in the peripheral area PA).

[0161] In this embodiment, the material of the semiconductor SE of the transistor TFT1 in the peripheral area PA may be low-temperature polycrystalline silicon (LTPS), the material of the semiconductor SE of the transistor TFT in the display area AA may be low-temperature polycrystalline oxide (LTPO), and the material of the semiconductor SE' of the transistor TFT2 in the display area AA may be indium gallium zinc oxide (IGZO), but are not limited thereto. In some embodiments, the semiconductor material may also include amorphous silicon (a-Si), polycrystalline silicon (e.g., low temperature polycrystalline silicon (LTPS)), low temperature polycrystalline oxide (LTPO), germanium, compound semiconductors (e.g., gallium nitride, silicon carbide, gallium arsenide, gallium phosphide, indium phosphide, indium arsenide and / or indium antimonide), alloy semiconductors (e.g., SiGe alloys, GaAsP alloys, AlInAs alloys, AlGaAs alloys, GaInAs alloys, GaInP alloys, GaInAsP alloys), metal oxides (e.g., indium gallium zinc oxide (IGZO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZTO)), organic semiconductors containing polycyclic aromatic compounds, or combinations of the foregoing.

[0162] In this embodiment, the first trench 324e can also be arranged between transistors of different types, for example, the first trench 324e is arranged between the transistor TFT2 (dual gate structure) and the transistor TFT (top gate structure), thereby reducing the risk of cracking caused by stress mismatch between transistors of different materials and different types.

[0163] In summary, in the rollable electronic device of the disclosed embodiment, since the first length direction of the first groove can be parallel to the extension direction of the rollable axis (direction Y) and perpendicular to the direction X (the moving direction of the rollable axis or the stretching direction of the rollable electronic device), and two adjacent first grooves can overlap each other in the direction X, the probability of cracks or damage to the rollable electronic device when stretched can be reduced. Since the second length direction of the second groove can be parallel to the first length direction and perpendicular to the direction X, and a portion of the plurality of second grooves can overlap the first groove, the probability of cracks or damage to the rollable electronic device when stretched can be reduced, and the probability of deformation of the support layer can be reduced.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, 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 disclosure.

Claims

1. A rollable electronic device having a rollable axis, characterized in that: include: basal layer; an insulating layer, disposed on the base layer and comprising a plurality of first grooves, wherein the plurality of first grooves have a first length direction parallel to the scrollable axis; as well as One or more electronic units, disposed on the insulating layer; In the top view, at least one electronic unit is disposed between two adjacent first grooves among the plurality of first grooves, and the two adjacent first grooves overlap each other along a direction perpendicular to the first length direction.

2. The rollable electronic device according to claim 1, characterized in that: Also includes: The support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein one of the plurality of first grooves overlaps a portion of the plurality of second grooves.

3. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device includes a rollable region and a flat region, and an area of ​​one of the plurality of first grooves in the rollable region is greater than an area of ​​another one of the plurality of first grooves in the flat region.

4. The rollable electronic device according to claim 1, characterized in that: At least one of the plurality of first trenches has a first length L1 and a first width W1, and the first length L1 and the first width W1 satisfy the following equation: 1×10 3 <L1 / W1<1×10 7 .

5. The rollable electronic device according to claim 1, characterized in that: At least one of the plurality of first trenches has a first length L1 and a first width W1, and the first length L1 and the first width W1 satisfy the following equation: 1×10 3 μm 2 <L1×W1<1×10 7 μm 2 .

6. The rollable electronic device according to claim 1, characterized in that: Also includes: A support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein at least one of the plurality of second grooves has a second length L2 and a second width W2, and the second length L2 and the second width W2 satisfy the following equation: <L2 / W2<100。 7. The rollable electronic device according to claim 1, characterized in that: Also includes: A support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein at least one of the plurality of second grooves has a second length L2 and a second width W2, and the second length L2 and the second width W2 satisfy the following equation: 1×10 5 μm 2 <L2×W2<3×10 6 μm 2 .

8. The rollable electronic device according to claim 1, characterized in that: Also includes: A support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein at least one of the plurality of first grooves has a first length L1, and at least one of the plurality of second grooves has a second length L2, and the first length L1 and the second length L2 satisfy the following equation: L1>L2.

9. The rollable electronic device according to claim 8, characterized in that: The first length L1 and the second length L2 satisfy the following equation: <L1 / L2≤1000。 10. The rollable electronic device according to claim 1, characterized in that: Also includes: A support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein at least one of the plurality of first grooves has a first width W1, and at least one of the plurality of second grooves has a second width W2, and the first width W1 and the second width W2 satisfy the following equation: W2>W1.

11. The rollable electronic device according to claim 10, characterized in that: The first width W1 and the second width W2 satisfy the following equation: 10≤W2 / W1≤3000.

12. The rollable electronic device according to claim 1, characterized in that: Also includes: A support layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein at least one of the plurality of first grooves has a first length L1 and a first width W1, and at least one of the plurality of second grooves has a second length L2 and a second width W2, and the first length L1, the second length L2, the first width W1, and the second width W2 satisfy the following equation: 10≤(L1 / W1) / (L2 / W2)≤3×10 6 .

13. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device includes a foldable area and a rollable area, and the number of the plurality of first grooves in the rollable area is greater than the number of the plurality of first grooves in the foldable area.

14. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device includes a foldable area and a rollable area, and a density of the first grooves in the rollable area is greater than a density of the first grooves in the foldable area.

15. The rollable electronic device according to claim 1, characterized in that: Also includes: A supporting layer is disposed under the base layer and includes a plurality of second grooves, wherein the plurality of second grooves have a second length direction parallel to the first length direction, wherein the rollable electronic device includes a foldable area and a rollable area, and an area of ​​one of the plurality of second grooves in the foldable area is different from an area of ​​another of the plurality of second grooves in the rollable area.

16. The rollable electronic device according to claim 15, characterized in that: The area of ​​one of the plurality of second grooves in the foldable region is greater than the area of ​​another one of the plurality of second grooves in the rollable region.

17. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device comprises a foldable area and a rollable area, and the width of the foldable area is smaller than the width of the rollable area.

18. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device comprises a foldable area and a rollable area. When the rollable electronic device is in a folded state, a curvature radius of the foldable area is smaller than a curvature radius of the rollable area.

19. The rollable electronic device according to claim 1, characterized in that: The rollable electronic device comprises a foldable area, a rollable area and a bending area. When the rollable electronic device is in a flattened state, the foldable area is closer to the bending area than the rollable area.

20. The rollable electronic device according to claim 1, wherein: Also includes: An organic portion is disposed in at least one of the plurality of first trenches.

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