TWI724807B - Flexible apparatus - Google Patents

Abstract

A flexible apparatus includes a flexible substrate, a pixel structure, a peripheral trace and a glue. The flexible substrate has a display area, a first connection area, a bendable area, a second connection area and a peripheral area. The first connection area, the bendable area and the second connection area are sequentially disposed between the display area and the peripheral area. The pixel structure is disposed on the display area. The peripheral trace is electrically connected to the pixel structure, and the peripheral trace extends from the display area to the first connection area, the bendable area and the second connection area. The glue is disposed on the bendable area, and the glue is not disposed on the first connection area and the second connection area. A reference axis is disposed on the bendable area. The flexible substrate is used to be bent along the reference axis. A thickness of the glue is reduced from the reference axis toward a first side and a second sides of the reference axis.

Description

Flexible device

The invention relates to a flexible device.

With the development of display technology, the application range of display panels has become increasingly widespread. For example, in the early days, display panels were mostly used as screens for electronic devices (such as TVs, computers, mobile phones, etc.), while display panels used on electronic devices were mostly rigid display panels; in the recent past, some people have used display panels In wearable devices (for example, watches, clothes, etc.), the display panels applied to wearable devices are mostly flexible display panels.

The flexible display panel needs to have a considerable degree of flexibility. In other words, when the flexible display panel is bent, the components on the flexible substrate (such as peripheral wiring, etc.) need to be bent accordingly and maintain normal functions. However, when the flexible display panel is bent, the stress will be concentrated on the bending center line, causing the peripheral wiring to easily break on the bending center line, which affects the yield and reliability of the flexible display panel.

The invention provides a flexible device with good performance.

The flexible device of the present invention includes a flexible substrate, a pixel structure, and a peripheral path. Thread and glue. The flexible substrate has a display area, a first connection area, a bendable area, a second connection area, and a peripheral area. The first connection area, the bendable area, and the second connection area are sequentially arranged between the display area and the peripheral area. between. The pixel structure is arranged in the display area and has an active element and a pixel electrode electrically connected to the active element. The peripheral wiring is electrically connected to the pixel structure, and extends from the display area to the first connection area, the bendable area, and the second connection area. The glue material is arranged in the bendable area, and is not arranged in the first connection area and the second connection area. The reference axis is arranged in the bendable area, the flexible base is adapted to bend along the reference axis, and the thickness of the glue material is reduced from the first side and the second side of the reference axis opposite to the reference axis.

In an embodiment of the present invention, the above-mentioned bendable area of the flexible substrate has a first edge and a second edge opposite to each other. The first edge and the second edge are intersected with the reference axis, and the adhesive material is intersected with the reference axis. There is a width in one direction, and the width of the glue material increases from the inside of the bendable area to the first edge and the second edge.

In an embodiment of the present invention, the above-mentioned bendable area of the flexible substrate has a first edge and a second edge opposite to each other. The first edge and the second edge are staggered with the reference axis, and the adhesive material has a main part, a first edge, and a second edge. The auxiliary part and the second auxiliary part, the main part of the glue material is arranged inside the bendable area, the first auxiliary part is arranged between the main part and the first edge, and the second auxiliary part is arranged between the main part and the second edge. The width of the main part is substantially the same, the width of the first auxiliary part is greater than the width of the main part and increases as it approaches the first edge, and the width of the second auxiliary part is greater than the width of the main part and increases as it approaches the second edge. increase.

L1

0.25．L。 In an embodiment of the present invention, the aforementioned glue material has a total length L in the extension direction of the reference axis, and the first auxiliary part of the glue material has a length L1 in the extension direction of the reference axis, and 0.1. L

L1

0.25. L.

L2

0.25．L。 In an embodiment of the present invention, the above-mentioned second auxiliary portion has a length L2 in the extension direction of the reference axis, and 0.1. L

L2

0.25. L.

(W0/W1)

1。 In an embodiment of the present invention, the main part of the above-mentioned rubber material has a width W0 in a direction staggered with the reference axis, and the first auxiliary part has a maximum width W1 in a direction staggered with the reference axis, and 0.3

(W0/W1)

1.

(W0/W2)

1。 In an embodiment of the present invention, the above-mentioned second auxiliary part has a maximum width W2 in a direction staggered with the reference axis, and 0.3

(W0/W2)

1.

In an embodiment of the present invention, the above-mentioned flexible device further includes a material layer, which is disposed at least in the bendable area. The peripheral wiring is located between the material layer and the flexible substrate. The material layer has a plurality of grooves on the first side and the second side of the reference axis, the glue material is arranged on the material layer, and part of the glue material is filled into the grooves.

In an embodiment of the present invention, the material layer located in the above-mentioned bendable area has a convex surface, the first tangent plane is tangent to the surface and passes through the reference axis, and the second tangent plane is tangent to the surface and Through one of the multiple grooves, the normal of the first tangent plane and the normal of the second tangent plane have an intersection, the intersection has a distance r from the reference axis, and the width of the adhesive material in the direction intersecting with the reference axis is intermediate Between 0.3πr to πr.

θ

85°。 In an embodiment of the present invention, the material layer located in the above-mentioned bendable area has a convex surface, the first tangent plane is tangent to the surface and passes through the reference axis, and the second tangent plane is tangent to the surface and Through one of the multiple grooves, the normal of the first tangent plane and the normal of the second tangent plane have an included angle θ, and 30°

θ

85°.

In an embodiment of the present invention, the above-mentioned multiple grooves include There are a plurality of first grooves on the first side of the test axis, and the depth of the first grooves increases with distance from the reference axis.

In an embodiment of the present invention, the above-mentioned plurality of grooves further includes a plurality of second grooves arranged on the second side of the reference shaft, and the depth of the second grooves increases with distance from the reference shaft.

10.10A: Flexible device

100: Pixel array substrate

110: Flexible substrate

110a: back

111: display area

112: The first connection area

113: Bendable area

113a: first edge

113b: second edge

114: The second connection area

115: Peripheral area

120: Semiconductor pattern

130: gate insulation

140: Gate

151: Source

152: Dip pole

153: Peripheral routing

160: pixel electrode

170: Material layer

170a: front

170b: surface

172, 174: Groove

172-1, 172-2, 172-3: the first groove

174-1, 174-2, 174-3: second groove

180: pad

200: glue

210: Main Department

220: First Auxiliary Department

230: Second Auxiliary Department

300: Protective film

400: drive element

500: Polarizer

A: width

B: Spacing

C: depth

H: thickness

K1, K2: area

L: total length

L1, L2: length

N1, N2: Normal

O: intersection

PX: Pixel structure

P1: first all plane

P2: The second tangent plane

r: distance

S1: First side

S2: second side

T: Active component

W0, W1, W2: width

X: reference axis

x, y, z, d: direction

I-I’, II-II’: Line segment

θ: included angle

FIG. 1 is a schematic side view of a flexible device 10 according to an embodiment of the present invention.

FIG. 2 is a schematic front view of a flexible device 10 according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a flexible device 10 according to an embodiment of the present invention.

4 is a schematic cross-sectional view of the pixel array substrate 100 of the flexible device 10 according to an embodiment of the invention.

FIG. 5 is a schematic side view of a flexible device 10A according to an embodiment of the present invention.

FIG. 6 is a schematic front view of a flexible device 10A according to an embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a flexible device 10A according to an embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view of the pixel array substrate 100 of the flexible device 10A according to an embodiment of the present invention.

Reference will now be made in detail to the exemplary embodiments of the present invention, and examples of the exemplary embodiments are illustrated in the accompanying drawings. Whenever possible, the same component symbols are shown in the diagrams and descriptions Used to indicate the same or similar parts.

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

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the A certain amount of measurement-related error (ie, the limitation of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, "about", "approximately" or "substantially" as used herein can be based on optical properties, etching properties or other properties to select a more acceptable range of deviation or standard deviation, and not one standard deviation can be applied to all properties .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present invention, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

FIG. 1 is a schematic side view of a flexible device 10 according to an embodiment of the present invention.

FIG. 2 is a schematic front view of a flexible device 10 according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a flexible device 10 according to an embodiment of the present invention. In particular, Fig. 3 corresponds to the line segment I-I' in Fig. 2 and the area K1 in Fig. 1.

For the sake of clarity, Figure 1, Figure 2 and Figure 3 depict the directions x, y, and z that are perpendicular to each other.

4 is a schematic cross-sectional view of the pixel array substrate 100 of the flexible device 10 according to an embodiment of the invention. It should be noted that FIGS. 1, 2 and 3 show a state where the flexible device 10 has been bent, and FIG. 4 shows a state where the flexible device 10 is not bent. Hereinafter, the structure of the flexible device 10 will be described through the combination of FIGS. 1, 2, 3, and 4.

1 and 4, the flexible device 10 includes a pixel array substrate 100. The pixel array substrate 100 includes a flexible substrate 110. The flexible substrate 110 has a display area 111, a first connection area 112, a bendable area 113, a second connection area 114, and a peripheral area 115. The first connection area 112, the bendable area 113, and the second connection area 114 follow The sequence is arranged between the display area 111 and the peripheral area 115.

The display area 111 refers to an area where the pixel structure PX is provided. The peripheral area 115 refers to the area where the pad 180 is provided, where the pad 180 is electrically connected to the peripheral wiring 153 and is used for bonding with the driving element 400, so that the driving element 400 can drive the pixel structure PX through the peripheral wiring 153 . The bendable area 113 refers to an area where the peripheral wiring 153 is provided and is in a curved state. The first connection area 112 refers to an area connected between the display area 111 and the bendable area 113. In this embodiment, the first connection area 112 is not substantially bent, and the first connection area 112 and the display area 111 are substantially connected to form a flat plate, but the present invention Ming is not limited to this. The second connection area 114 refers to an area connected between the bendable area 113 and the peripheral area 115. In this embodiment, the second connection area 114 is not substantially bent, and the second connection area 114 and the peripheral area 115 are substantially connected to form a flat plate, but the invention is not limited to this.

In this embodiment, the flexible device 10 may further include a protective film 300 disposed on the back surface 110 a of the pixel array substrate 100. The protective film 300 covers the display area 111 and the peripheral area 115, but does not cover the first connection area 112, the bendable area 113, and the second connection area 114. In this embodiment, the flexible device 10 can also optionally include a polarizer 500 disposed on the front surface 170 a of the pixel array substrate 100. The polarizer 500 covers the display area 111, but does not cover the first connection area 112, the bendable area 113, the second connection area 114 and the peripheral area 115.

For example, in this embodiment, the material of the flexible substrate 110 can be an organic polymer, such as polyimide (PI), polyethylene naphthalate (PEN), and poly(p-phenylene). Polyethylene terephthalate (PET), polycarbonates (PC), polyether sulfone (PES) or polyarylate, other suitable materials, or at least two of the foregoing The combination of materials.

4, the pixel array substrate 100 further includes a pixel structure PX, which is disposed in the display area 111 of the flexible substrate 110, and has an active device T and a pixel electrode 160 electrically connected to the active device T. For example, in this embodiment, the active device T includes a thin film transistor. The thin film transistor has a gate 140, a semiconductor pattern 120, a gate insulating layer 130, a source 151, and a drain 152. The gate insulating layer 130 is disposed on the gate. pole Between 140 and the semiconductor pattern 120, the source electrode 151 and the drain electrode 152 are respectively electrically connected to two regions of the semiconductor pattern 120, and the pixel electrode 160 is electrically connected to the drain electrode 152 of the thin film transistor.

The pixel array substrate 100 further includes a peripheral wiring 153 electrically connected to the pixel structure PX and extending from the display area 111 to the first connection area 112, the bendable area 113 and the second connection area 114. The peripheral trace 153 can also be called a fan-out trace. In this embodiment, the peripheral wiring 153 may use metallic materials, alloys, nitrides of metallic materials, oxides of metallic materials, oxynitrides of metallic materials, other conductive materials, or stacked layers of at least two of the foregoing.

Referring to FIGS. 1, 2, 3, and 4, the flexible device 10 further includes a cured adhesive material 200, which is disposed in the bendable area 113 of the pixel array substrate 100, and is not disposed in the first connection area 112 and the second connecting area 114, where the reference axis X is arranged in the bendable area 113, the flexible substrate 110 is adapted to bend along the reference axis X, and the thickness H of the adhesive material 200 is relative to the reference axis X from the reference axis X to the reference axis X The first side S1 and the second side S2 are reduced. In other words, the adhesive material 200 has the largest thickness H on the reference axis X; the closer to the first connection area 112 and the second connection area 114, the thinner the thickness H of the adhesive material 200 is.

It is worth mentioning that by arranging the rubber 200 on the bending center line (ie, the reference axis X) of the bendable area 113, and making the thickness H of the rubber 200 from the bending center line to the two sides of the bending center line The side reduction can make the surface 170b of the bent portion of the pixel array substrate 100 approximate to a portion of the surface of a cylinder. In this way, the stress on the peripheral wire 153 at the corresponding bending center line (ie, the reference axis X) is reduced, and it is not easy to crack.

The flexible device (not shown) of the first comparative example is similar to the flexible device 10 of this embodiment. The only difference between the flexible device of the first comparative example and the flexible device 10 of this embodiment is: The flexible device of the first comparative example does not include the glue 200 of the flexible device 10 of this embodiment.

The flexible device (not shown) of the second comparative example is similar to the flexible device 10 of this embodiment. The flexible device of the second comparative example also has a glue material, which is arranged in the bendable area but not in the first connection area and the second connection area. The only difference between the flexible device of the second comparative example and the flexible device 10 of this embodiment is that the overall thickness of the rubber material of the flexible device of the second comparative example is the same.

According to a simulation result, the peripheral traces of the flexible device of the first comparative example are subjected to a stress of 288 MPa at the bending center line, and the peripheral traces of the flexible device of the second comparative example are located at the bending center line. The obtained stress is 286 MPa, and the stress on the peripheral trace of the flexible device of this embodiment at the bending center line is 260 MPa. Compared with the first comparative example, the stress on the peripheral traces of the second comparative example at the bending centerline is only reduced by 0.7%, but the stress on the peripheral traces 153 of this embodiment at the bending centerline is only reduced by 0.7% Significantly reduced by 10%.

It can be proved that by setting the rubber 200 on the bending centerline of the bendable area 113 (ie, the reference axis X), and making the thickness H of the rubber 200 from the bending centerline to both sides of the bending centerline The reduction can reduce the stress on the peripheral wire 153 at the bending center line, and it is not easy to be cracked, thereby improving the yield and reliability of the flexible device 10.

In this embodiment, the hardness of the rubber material 200 is high, and the selection of the rubber material 200 It is better to have a high Young's modulus. For example, in this embodiment, the Young's modulus of the adhesive material 200 may be between 0.5 GPa and 2.5 GPa, such as but not limited to 1.75 GPa. The following Table 1 shows the maximum thickness H of the adhesive material 200 and the stress on the reference axis X of the surrounding wiring 153 of an embodiment of the present invention. Please refer to Table 1 below. When the maximum thickness H of the adhesive material 200 is increased to 100 μm, the stress on the peripheral trace 153 at the reference axis X will significantly increase to 361 MPa. Therefore, in this embodiment, the maximum thickness H of the adhesive material 200 is preferably greater than or equal to 10 μm and less than 100 μm. However, the present invention is not limited to this, and the appropriate range of the maximum thickness H of the adhesive material 200 is related to the Young's modulus of the adhesive material 200 itself, and the present invention is not limited.

In this embodiment, the material of the adhesive material 200 may include acrylic series, epoxy resin or other suitable materials.

1 and 2, the bendable region 113 of the flexible substrate 110 has a first edge 113a and a second edge 113b opposite to each other, wherein the first edge 113a and the second edge 113b are intersected with the reference axis X. In this embodiment, the adhesive material 200 has a main part 210, a first auxiliary part 220, and a second auxiliary part 230. The main part 210 of the adhesive material 200 is arranged inside the bendable area 113, and the first auxiliary part 220 is arranged in Between the main portion 210 and the first edge 113a, the second auxiliary portion 230 is provided between the main portion 210 and the second edge 113a. Between the edges 113b, the width W0 of the main portion 210 is substantially the same. The width W1 of the first auxiliary portion 220 is greater than the width W0 of the main portion 210 and increases as it approaches the first edge 113a. The width W2 of the second auxiliary portion 230 is greater than The width W0 of the main portion 210 increases as it approaches the second edge 113b. In short, in this embodiment, the vertical projection of the adhesive material 200 on the flexible substrate 110 may be the vertical projection of two speakers whose narrow parts are connected and mirror each other.

L1

0.25．L；膠材200的第二輔助部230在參考軸X的延伸方向x上具有一長度L2，且0.1．L

L2

0.25．L。 For example, in this embodiment, the adhesive material 200 has a total length L in the extension direction x of the reference axis X, and the first auxiliary portion 220 of the adhesive material 200 has a length L1 in the extension direction x of the reference axis X. , And 0.1. L

L1

0.25. L; The second auxiliary part 230 of the adhesive material 200 has a length L2 in the extension direction x of the reference axis X, and 0.1. L

L2

0.25. L.

(W0/W1)

1。第二輔助部230在與參考軸X交錯的方向d上具有一最大的寬度W2，且0.3

(W0/W2)

1。 For example, in this embodiment, the main part 210 of the adhesive material 200 has a width W0 in a direction d intersecting with the reference axis X, and the first auxiliary part 220 has a maximum width W0 in a direction d intersecting with the reference axis X. The width W1, and 0.3

(W0/W1)

1. The second auxiliary part 230 has a maximum width W2 in the direction d intersecting with the reference axis X, and 0.3

(W0/W2)

1.

Please refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4. In this embodiment, the flexible device 10 further includes a material layer 170, which is disposed at least in the bendable area 113. The peripheral wiring 153 is located between the material layer 170 and the flexible substrate 110. In particular, the material layer 170 has a plurality of grooves 172, 174 located on the first side S1 and the second side S2 of the reference axis X. The adhesive material 200 is disposed on the material layer 170, and part of the adhesive material 200 is filled with a plurality of grooves. Grooves 172,174.

The grooves 172 and 174 are used to limit the distribution range of the glue 200 during the formation of the glue 200, so that the glue 200 is formed in a designated area. In addition, through the arrangement of the grooves 172 and 174, part of the rubber material 200 will sink into the grooves 172 and 174 at a distance away from the reference axis X, and it is easier to form the thickness H from the reference axis X to the reference axis X. The adhesive material 200 is reduced on one side S1 and the second side S2.

In this embodiment, the material layer 170 is, for example, a dielectric layer disposed on the pixel electrode 160 of the pixel structure PX, such as a pixel definition layer. In this embodiment, the material layer 170 may be an organic insulating layer. However, the present invention is not limited to this, and any film layer located on the peripheral wiring 153 and having a sufficient thickness can be used as the material layer 170. For example, in another embodiment not shown, a touch substrate (not shown) may be provided on the pixel array substrate 100, and the base of the touch substrate may also be used as the material layer 170; that is, The back surface of the base of the touch substrate may have grooves 172 and 174, and the adhesive 200 may also be disposed on the back surface of the base of the touch substrate.

θ

85°。 3 and 4, in this embodiment, the material layer 170 located in the bendable area 113 has a convex surface 170b. 3, the first tangent plane P1 is tangent to the surface 170b and passes through the reference axis X, the second tangent plane P2 is tangent to the surface 170b and passes through a groove 174, the normal line N1 of the first tangent plane P1 and the second The normal line N2 of the tangent plane P2 has a point of intersection O, which has a distance r from the reference axis X, and the widths W0, W1, and W2 of the adhesive material 200 in a direction d intersecting with the reference axis X range from 0.3πr to πr . From another perspective, in this embodiment, the normal line N1 of the first tangent plane P1 and the normal line N2 of the second tangent plane P2 have an included angle θ, and 30°

θ

85°.

It must be noted here that the following embodiments follow the elements of the previous embodiments Reference numerals and part of the content, wherein the same reference numerals 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.

FIG. 5 is a schematic side view of a flexible device 10A according to an embodiment of the present invention.

FIG. 6 is a schematic front view of a flexible device 10A according to an embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a flexible device 10A according to an embodiment of the present invention. In particular, FIG. 7 corresponds to the line segment II-II' in FIG. 6 and the area K2 in FIG. 5.

For the sake of clarity, FIGS. 5, 6 and 7 depict the direction x, direction y, and direction z that are perpendicular to each other.

FIG. 8 is a schematic cross-sectional view of the pixel array substrate 100 of the flexible device 10A according to an embodiment of the present invention. It should be noted that FIGS. 5, 6 and 7 show a state where the flexible device 10 has been bent, and FIG. 8 shows a state where the flexible device 10 is not bent. Hereinafter, the structure of the flexible device 10A will be described through the combination of FIG. 5, FIG. 6, FIG. 7 and FIG. 8.

Please refer to FIGS. 5, 6, 7 and 8, the flexible device 10A of this embodiment is similar to the aforementioned flexible device 10, and the difference between the two is: in this embodiment, a plurality of grooves 172, 174 include a plurality of first grooves 172-1, 172-2, 172-3 and a plurality of second grooves 174-1, 174 respectively provided on the first side S1 and the second side S2 of the reference axis X -2, 174-3; In particular, the depth C of the first plurality of grooves 172-1, 172-2, 172-3 increases as it moves away from the reference axis X, and the plurality of second grooves 174-1, 172-3 increase away from the reference axis X. The depth C of 174-2 and 174-3 increases with distance from the reference axis X.

The above-mentioned multiple first grooves 172-1, 172-2, 172-3 and multiple second grooves 174-1, 174-2, 174-3 with a gradual depth C contribute to the formation of the thickness H by the reference axis The adhesive material 200 is reduced on the first side S1 and the second side S2 opposite to the reference axis X in the X direction.

For example, in this embodiment, the depth C of the first grooves 172-1, 172-2, 172-3 and the depth C of the second grooves 174-1, 174-2, 174-3 may be between 1μm~10μm; the width A in the direction d of the first grooves 172-1, 172-2, 172-3 and the second grooves 174-1, 174-2, 174-3 can be between 10μm and 100μm; The pitch B of the plurality of first grooves 172-1, 172-2, 172-3 in the direction d and the pitch of the second grooves 174-1, 174-2, 174-3 in the direction d B can be between 10 μm and 100 μm; but the present invention is not limited to this.

10: Flexible device

100: Pixel array substrate

110a: back

111: display area

112: The first connection area

113: Bendable area

114: The second connection area

115: Peripheral area

170a: front

200: glue

300: Protective film

400: drive element

500: Polarizer

H: thickness

K1: area

x, y, z: direction

Claims (12)

A flexible device comprising: a flexible substrate with a display area, a first connection area, a bendable area, a second connection area and a peripheral area, wherein the first connection area and the bendable area Area and the second connection area are sequentially arranged between the display area and the peripheral area; a protective film covers the display area and the peripheral area, but does not cover the first connection area, the bendable area and the A second connection area; a pixel structure disposed in the display area and having an active device and a pixel electrode electrically connected to the active device; a peripheral wiring electrically connected to the pixel structure, and Extending from the display area to the first connection area, the bendable area, and the second connection area; and a glue material disposed in the bendable area, but not disposed in the first connection area and the second connection area In the connecting area, one of the reference axes is arranged in the bendable area, the flexible substrate is adapted to bend along the reference axis, and the thickness of the adhesive material is determined by the reference axis on a first side opposite to the reference axis One second side decreases. The flexible device according to claim 1, wherein the bendable area of the flexible substrate has a first edge and a second edge opposite to each other, and the first edge and the second edge are staggered with the reference axis The glue material has a width in a direction staggered with the reference axis, and the width of the glue material increases from the inside of the bendable area to the first edge and the second edge. The flexible device according to claim 1, wherein the bendable area of the flexible base has a first edge and a second edge opposite to each other, the first edge and the The second edge is staggered with the reference axis. The rubber material has a main part, a first auxiliary part and a second auxiliary part. The main part of the rubber material is arranged inside the bendable area, and the first auxiliary Part is disposed between the main part and the first edge, the second auxiliary part is disposed between the main part and the second edge, a width of the main part is substantially the same, and the width of the first auxiliary part is greater than The width of the main part increases as it approaches the first edge, and the width of the second auxiliary part is larger than the width of the main part and increases as it approaches the second edge. The flexible device according to claim 3, wherein the rubber material has a total length L in an extension direction of the reference axis, and the first auxiliary part of the rubber material has an extension direction of the reference axis A length L1, and 0.1. L

L1

0.25. L. The flexible device according to claim 4, wherein the second auxiliary portion has a length L2 in the extending direction of the reference axis, and 0.1. L

L2

0.25. L. The flexible device according to claim 3, wherein the main part of the glue material has the width W0 in a direction staggered with the reference axis, and the first auxiliary part has a width W0 in the direction staggered with the reference axis A maximum width W1, and 0.3

(W0/W1)

1. The flexible device according to claim 6, wherein the second auxiliary part has a maximum width W2 in the direction staggered with the reference axis, and 0.3

(W0/W2)

1. The flexible device according to claim 1, further comprising: a material layer disposed at least in the bendable area, wherein the peripheral wiring is located between the material layer and the flexible substrate, and the material layer has The first of the reference axis A plurality of grooves on the side and the second side, the glue is arranged on the material layer, and part of the glue is filled into the grooves. The flexible device according to claim 8, wherein the material layer located in the bendable area has a convex surface, a first tangent plane is tangent to the surface and passes through the reference axis, and a second tangent The plane is tangent to the surface and passes through one of the grooves, a normal of the first tangent plane and a normal of the second tangent plane have an intersection, and the intersection has a distance r from the reference axis, and The width of the rubber material in the direction intersecting with the reference axis is between 0.3πr and πr. The flexible device according to claim 8, wherein the material layer located in the bendable area has a convex surface, a first tangent plane is tangent to the surface and passes through the reference axis, and a second tangent The plane is tangent to the surface and passes through one of the grooves, a normal line of the first tangent plane and a normal line of the second tangent plane have an included angle θ, and 30°

θ

85°. The flexible device according to claim 8, wherein the grooves include a plurality of first grooves arranged on the first side of the reference shaft, and the depth of the first grooves increases as they move away from the reference shaft Axis and increase. The flexible device according to claim 11, wherein the grooves further include a plurality of second grooves disposed on the second side of the reference shaft, and the depth of the second grooves increases as they move away from the The reference axis is increased.

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