TWI678801B - Display device - Google Patents

Abstract

The display device includes a first flexible element substrate, a first protective layer, a first adhesive layer, and a first non-adhesive material layer. The first flexible element substrate includes a display portion, a driving element portion, and a connection portion. The connecting portion connects the display portion and the driving element portion. The first protective layer is disposed on a surface of the first flexible element substrate. The first adhesive layer is disposed between the first flexible element substrate and the first protective layer. The first non-adhesive material layer is disposed between the connection portion of the first flexible element substrate and the first adhesive layer.

Description

Display device

The present invention relates to a display device, and more particularly to a flexible display device.

With the development of display technology, the application range of display devices is becoming increasingly widespread. Among today's display technologies, flexible display devices have become a new generation of forward-looking display technologies due to their excellent features such as high lightness, impact resistance, flexibility, wearability, and portability. However, the bent portion of the display device is prone to the problem of structural damage due to the stress caused by the deformation.

According to an embodiment of the present invention, a display device is provided, which includes a first flexible element substrate, a first protective layer, a first adhesive layer, and a first non-adhesive material layer. The first flexible element substrate includes a display portion, a driving element portion, and a connection portion. The connecting portion connects the display portion and the driving element portion. The first protective layer is disposed on a surface of the first flexible element substrate. The first adhesive layer is disposed between the first flexible element substrate and the first protective layer. First non-adhesive The material layer is disposed between the connection portion of the first flexible element substrate and the first adhesive layer.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

102, 202, 302, 402, 502, 602, 702, 802, 902, 1002, 1402, 1502‧‧‧ display devices

108‧‧‧The first non-adhesive material layer

110, 1510‧‧‧ first flexible element substrate

102A‧‧‧Part I

102B‧‧‧ Connection

102C‧‧‧Part II

104‧‧‧first protective layer

106‧‧‧First Adhesive Layer

1510D‧‧‧Peripheral area

110A, 160A‧‧‧Display

110B, 160B‧‧‧ Connection

110C, 160C‧‧‧Drive Element Unit

117‧‧‧ release film

156‧‧‧Second Adhesive Layer

158, 1408, 1508‧‧‧Second non-adhesive material layer

160‧‧‧Second flexible element substrate

166‧‧‧Third level

174‧‧‧second protective layer

D1‧‧‧ first direction

D2‧‧‧ Second direction

D3‧‧‧ Third direction

S1‧‧‧First side

S2‧‧‧Second side

FIG. 1 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 2 is a top view of the display device of FIG. 1 in a flattened state.

FIG. 3 is a cross-sectional view of the display device of FIG. 1 in a folded state.

FIG. 4 illustrates a manufacturing method of the display device of FIG. 1.

FIG. 5 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 6A is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 6B is a top view of the first adhesive layer and the first non-adhesive material layer of the connection portion of the display device of FIG. 6A.

FIG. 7 is a top view of a first adhesive layer and a first non-adhesive material layer of a connection portion of a display device according to an embodiment.

FIG. 8 is a top view of the first adhesive layer and the first non-adhesive material layer of the connection portion of the display device according to an embodiment.

FIG. 9 is a top view of a first adhesive layer and a first non-adhesive material layer of a connection portion of a display device according to an embodiment.

FIG. 10 is a top view of a first adhesive layer and a first non-adhesive material layer of a connection portion of a display device according to an embodiment.

FIG. 11 is a top view of a first adhesive layer and a first non-adhesive material layer of a connection portion of a display device according to an embodiment.

FIG. 12 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 13 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 14 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 15 is a schematic cross-sectional view of a display device in a flattened state according to an embodiment.

FIG. 16 shows a top view of the display device of FIG. 15 when it is flattened.

The invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Exemplary embodiments are described herein with reference to cross-sectional views that are schematic views of idealized embodiments. Accordingly, variations in the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Therefore, the embodiments described herein should not be construed as limited to the particular shape of the area as shown herein, but include shape deviations caused by, for example, manufacturing. For example, a region shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, the acute angles shown may be round. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

In the following, some examples are used for illustration. It should be noted that this disclosure does not show all possible embodiments, and other implementations not proposed in this disclosure may also be applicable. Moreover, the dimensional proportions in the drawings are not drawn according to the actual products. Therefore, the contents of the description and the drawings are only used to describe the embodiments, and not used to limit the scope of the disclosure. In addition, the descriptions in the embodiments, such as the detailed structure, process steps, and application of materials, are for illustration purposes only, and are not intended to limit the scope of the disclosure to be protected. The details of the steps and structures of the embodiments can be changed and modified according to the needs of the actual application process without departing from the spirit and scope of the present disclosure. The following uses the same / similar symbols to indicate the same / similar components for explanation.

Please refer to FIG. 1, which is a schematic cross-sectional view of a display device 102 according to an embodiment in a flattened state. The display device 102 includes a first protective layer 104, a first adhesive layer 106, and a first non-adhesive property arranged along the first direction D1. The material layer 108 and the first flexible element substrate 110. The first adhesive layer 106 is adhered between the first protective layer 104 and the first flexible element substrate 110. The first flexible element substrate 110 includes a display portion 110A, a connection portion 110B, and a driving element portion 110C arranged along the second direction D2. The first direction D1 and the second direction D2 are different, for example, they are substantially perpendicular to each other. The connecting portion 110B connects the display portion 110A and the driving element portion 110C. The first non-adhesive material layer 108 is disposed between the connection portion 110B of the first flexible element substrate 110 and the first adhesive layer 106. The display device 102 includes a first portion 102A, a connection portion 102B, and a second portion 102C arranged along the second direction D2. The first portion 102A and the second portion 102C of the display device 102 correspond to the display portion 110A and the driving element portion 110C of the first flexible element substrate 110, respectively. The connection portion 102B of the display device 102 corresponds to the connection portion 110B of the first flexible element substrate 110 and connects the first portion 102A and the second portion 102C.

The first protective layer 104 may include, but is not limited to, polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), hydrocarbon polymer (COP), and the like.

The first adhesive layer 106 may include an adhesive material having adhesive properties, such as Optically Clear Resin (OCR), Optical Clear Adhhesive (OCA), Pressure-sensitive adhesive (PSA), polyvinyl alcohol (polyvinyl alcohol, PVA).

The first flexible element substrate 110 may include a base material such as, but not limited to, PI, PET, PEN, COP, and the like. The first flexible element substrate 110 may include a circuit formed on a base material.

The material of the first non-adhesive material layer 108 may include a conductive material or a non-conductive material. The conductive material may include, for example, metal, indium tin oxide (ITO), indium zinc oxide (IZO), zinc aluminum oxide (AZO), indium aluminum oxide (AIO), indium oxide (InO), gallium oxide (GaO), Indium gallium zinc oxide (IGZO), nano carbon tube, nano silver, or a combination of the above, can be adjusted to a static dissipative impedance to achieve the effect of dissipating static electricity. The material of the first non-adhesive material layer 108 may further include organic or inorganic materials. Inorganic materials may include carbon (such as carbon powder), talc, metal oxides (such as ITO), and the like. The organic material may include a fluororesin, a silicone resin, an acrylic resin, an epoxy resin, or a combination thereof. The first non-adhesive material layer 108 may include a fluorine material.

Please refer to FIG. 2, which shows a top view of the display device 102 of FIG. 1 in a flattened state, in which the first flexible element substrate 110 is transparent and presents the first non-adhesive material layer 108 and First Adhering Layer 106. FIG. 1 is drawn along the section line AB in FIG. 2. As shown in FIG. 2, the connection portion 102B of the display device 102 (or the connection portion 110B of the first flexible element substrate 110) has a first side S1 and a second side S2 facing each other. The first non-adhesive material layer 108 extends from the first side S1 to the second side S2, for example, along the third direction D3, and is distributed over the entire connecting portion 102B. However, it is not limited to this. In other embodiments, the first non-adhesive material layer 108 may be disposed only on a part of the connecting portion 102B, which will be described later.

Please refer to FIG. 3, which is a cross-sectional view of the display device 102 of FIG. 1 in a bent state. The display device 102 is flexible and can be bent through The connecting portion 102B is folded such that the first protective layer 104 of the first portion 102A and the second portion 102C face each other, and thus, when viewed from the first direction D1, the display portion 110A and the driving element portion of the first flexible element substrate 110 The component circuits of the 110C can overlap each other. Therefore, the frame of the display device can be narrower or even be frameless. The first non-adhesive material layer 108 of the connection portion 102B makes the connection portion 110B and the first adhesive layer 106 of the first flexible element substrate 110 not adhere to each other. Therefore, the connection portions 110B and The first protective layer 104 and the first adhesive layer 106 can each deform independently of the bending stress without affecting each other. In particular, the first flexible element substrate 110 is not affected by the first protective layer 104 and the first adhesive layer 106. Deformation stress caused by bending is involved in damaging the circuit structure, so the product yield and efficiency of the display device can be improved.

Please refer to FIG. 4, which illustrates a manufacturing method of the display device 102 of FIG. 1. The first adhesive layer 106 is disposed on the first protective layer 104. A release film 117 is disposed on the first adhesive layer 106. A part of the release film 117 is removed to form an opening 120. A first non-adhesive material layer 108 is formed on the first adhesive layer 106 exposed by the opening 120. Then, the release film 117 is removed, and a first flexible element substrate 110 is disposed on the first adhesive layer 106 and the first non-adhesive material layer 108 to form a display device 102 as shown in FIG. 1.

In an embodiment, the opening 120 of the release film 117 shown in FIG. 4 is formed by performing a partial laser process on the release film 117, and the laser-treated portion of the release film 117 may be gray. The carbonized or carbonized powder (for example, carbon powder) remains directly adhered to the first adhesive layer 106 to form a first non-adhesive material layer 108. The laser process can be performed under atmospheric pressure. In another embodiment, the A non-adhesive material layer 108 can be formed by spraying, coating or coating to form an inorganic material, such as a powder material (such as carbon powder, talc, etc.), or a metal oxide (such as ITO, etc.) exposed at the opening 120. One adhesive layer 106 is adhered to the first adhesive layer 106. Also removes excess powder. In still another embodiment, the first non-adhesive material layer 108 may be formed by spraying, coating, or the like on the first adhesive layer 106 exposed by the opening 120, for example, including a fluororesin, a silicone resin, Acrylic resin, epoxy resin, etc. The resin may include a curable composition and can be cured by a method such as light or heat. In yet another embodiment, the first non-adhesive material layer 108 may be formed by modifying the first adhesive layer 106 exposed by the opening 120 to lose its adhesiveness. The method for forming the first non-adhesive material layer 108 can be arbitrarily selected. For example, the methods described above can be appropriately combined and applied.

Please refer to FIG. 5, which is a schematic cross-sectional view of a display device 202 according to an embodiment in a flattened state. The difference from the display device 102 of FIG. 1 is that the first protective layer 204 of the connecting portion 102B is opposite to The other surface of the first adhesive layer 106 has a concave-convex contour. The concave-convex contour can be formed by micromachining the surface of the first protective layer 204. The gap caused by the concave-convex profile makes the connecting portion 102B easier to bend, and can reduce the stress of pulling the other components due to the deformation of the first protective layer 204. The concave-convex contour on the surface of the first protective layer 204 is not limited to the deep depression depth as shown in FIG. 5 and the design of the first adhesive layer 106 (that is, the concave depth of the concave-convex contour is the entire thickness of the first protective layer 204). In other embodiments, the depression depth of the concave-convex contour may not reach the first adhesion layer 106 (that is, the depression of the concave-convex contour). The depth may be a part of the thickness of the first protective layer 204). The surface of the first protective layer 204 may have a number of different concave-convex contours. For example, the concave depth of the concave-convex contour of one part is the entire thickness of the first protective layer 204, and the concave depth of the concave-convex contour of the other part is the same as that of the first protective layer 204. Partial thickness and depression depth can be the same or different.

Please refer to Figures 6A and 6B. FIG. 6A is a schematic cross-sectional view of a display device 302 according to an embodiment in a flattened state. FIG. 6B is a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 302. The difference between the display device 302 and the display device 102 shown in FIG. 1 and FIG. 2 is that the first non-adhesive material layer 108 has a stripe pattern arranged spaced apart in the second direction D2, and each stripe pattern is along the third The direction D3 extends continuously from the first side S1 to the second side S2 of the connecting portion 302B, so that the portion corresponding to the stripe pattern can communicate with the atmosphere. The third direction D3 is different from the first direction D1 and the second direction D2. For example, the third direction D3 is substantially perpendicular to the first direction D1 and the second direction D2.

Please refer to FIG. 7, which illustrates a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 402 according to an embodiment, and the display device 302 shown in FIG. 6. The difference lies in that the stripe patterns of the first non-adhesive material layer 108 are not only spaced apart from each other in the second direction D2 but also spaced apart from each other in the third direction D3 and are staggered. Part of the stripe pattern may extend into the first side S1 and the second side S2 of the connecting portion 102B One. The remaining stripe patterns do not extend to the first side S1 and the second side S2 of the connecting portion 102B.

Please refer to FIG. 8, which illustrates a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 502 according to an embodiment. In this example, the first non-adhesive material layer 108 has a hexagonal pattern arranged in a staggered space.

Please refer to FIG. 9, which illustrates a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 602 according to an embodiment, and the display device 302 shown in FIG. 6. The difference is that the stripe pattern of the first non-adhesive material layer 108 extending in the third direction D3 does not reach the first side S1 and the second side S2 of the connecting portion 102B.

Please refer to FIG. 10, which illustrates a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 702 according to an embodiment, and the display device 302 shown in FIG. 6. The difference is that the stripe pattern of the first non-adhesive material layer 108 has a smaller width at the end portions of the first side S1 and the second side S2 near the connection portion 102B, and the remaining middle portion has a larger width. .

Please refer to FIG. 11, which illustrates a top view of the first adhesive layer 106 and the first non-adhesive material layer 108 of the connection portion 102B of the display device 802 according to an embodiment. The first non-adhesive material layer 108 has a mesh pattern, and the first non-adhesive material layer 108 does not extend to the first side S1 and the second side S2 of the connection portion 102B.

In other embodiments, the first non-adhesive material layer 108 may have other shapes and configurations. For example, the first non-adhesive material layer 108 may have a circular pattern, other geometric shapes, or irregular shapes, and so on. In an embodiment, the first non-adhesive material layer 108 occupies at least 10% of the area of the connecting portion 102B in the above view.

Please refer to FIG. 12, which is a schematic cross-sectional view of a display device 902 according to an embodiment in a flattened state. The differences between the display device 902 and the display device 102 shown in FIG. 1 are described below. The display device 902 further includes a second adhesive layer 156, a second non-adhesive material layer 158, a second flexible element substrate 160, and a third adhesive layer disposed on the first flexible element substrate 110 along the first direction D. 166 与 第二 保护 层 174. The second flexible element substrate 160 includes a display portion 160A, a connection portion 160B, and a driving element portion 160C. The connection portion 160B connects the display portion 160A and the driving element portion 160C. The second adhesive layer 156 is adhered between the first flexible element substrate 110 and the second flexible element substrate 160. The second non-adhesive material layer 158 is disposed between the connection portion 160B of the second flexible element substrate 160 and the second adhesive layer 156. The third adhesive layer 166 is adhered between the second flexible element substrate 160 and the second protective layer 174. In this embodiment, the patterns of the first non-adhesive material layer 108 and the second non-adhesive material layer 158 are staggered with each other. For example, the projections in the first direction D1 to the second protective layer 174 are staggered. The first protective layer 104 of the connection portion 102B has a concave-convex contour on a surface opposite to the first adhesive layer 106. In one embodiment, the first flexible element substrate 110 has a circuit of a display panel, and the second flexible element substrate 160 has a circuit. 控 电路。 Control circuit. In one embodiment, the first flexible element substrate 110 is, for example, a display panel, a touch panel, a touch display panel, a protective cover, or a protective functional film. In another embodiment, the second flexible element substrate 160 is, for example, a display panel, a touch panel, a protective cover, a protective functional film, or a touch display panel, such as an integrated touch display panel (In Cell Touch Panel). Or an on-cell touch display panel is then laminated with a functional protective film.

Please refer to FIG. 13, which is a schematic cross-sectional view of a display device 1002 according to an embodiment in a flattened state. The differences between the display device 1002 and the display device 902 of FIG. 12 are described below. The patterns of the first non-adhesive material layer 108 and the second non-adhesive material layer 158 of the connecting portion 102B are arranged corresponding to each other. For example, the projections in the first direction D1 to the second protective layer 174 substantially overlap each other. The uneven contour on the surface of the first protective layer 204 may correspond to the pattern configuration of the first non-adhesive material layer 108 and the second non-adhesive material layer 158.

Please refer to FIG. 14, which is a schematic cross-sectional view of a display device 1402 according to an embodiment in a flattened state. The differences between the display device 1402 and the display device 102 shown in FIG. 1 are described below. The display device 1402 further includes a second non-adhesive material layer 1408. The second non-adhesive material layer 1408 is provided between the driving element portion 110C of the first flexible element substrate 110 and the first adhesive layer 106.

Please refer to FIG. 15 and FIG. 16, which respectively show a schematic cross-sectional view and a top view of the display device 1502 according to an embodiment in a flat state. The first flexible element substrate 1510 of FIG. 16 is a perspective view showing a first The next layer 106, the first non-adhesive material layer 108, and the second non-adhesive material layer 1508. Fig. 15 is drawn along the section line CD in Fig. 16. The differences between the display device 1502 and the display device 102 shown in FIG. 1 are described below. The first flexible element substrate 1510 of the display device 1502 further includes a peripheral region 1510D. The peripheral region 1510D surrounds the display portion 110A. In another embodiment, the peripheral region 1510D may be a part of the display portion 110A. The display device 1502 further includes a second non-adhesive material layer 1508. The second non-adhesive material layer 1508 is disposed in a ring shape between the peripheral region 1510D of the first flexible element substrate 1510 and the first adhesive layer 106. It should be noted that, in this embodiment, the second non-adhesive material layer 1508 is arranged in a ring shape between the peripheral region 1510D of the first flexible element substrate 1510 and the first adhesive layer 106, but not limited thereto Alternatively, the second non-adhesive material layer 1508 may also be partially provided in a portion of the peripheral region 1510D.

In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (16)

A display device includes: a first flexible element substrate having a display portion, a driving element portion, and a connecting portion, the connecting portion connecting the display portion and the driving element portion; a first protective layer provided on Adjacent to one side of the first flexible element substrate; a first adhesion layer disposed between the first flexible element substrate and the first protective layer; and a first non-adhesive material layer disposed on Between the connection portion of the first flexible element substrate and the first adhesive layer. The display device according to item 1 of the scope of patent application, wherein the first non-adhesive material layer has a stripe pattern or a mesh pattern. The display device according to item 2 of the scope of patent application, wherein the connection portion of the first flexible element substrate has a first side and a second side opposite to each other, and the first non-adhesive material layer is from the The first side extends to the second side. The display device according to item 2 of the scope of patent application, wherein the connection portion of the first flexible element substrate has a first side and a second side opposite to each other, and the first non-adhesive material layer is not extended. Reach the first side and the second side of the connection portion. The display device according to item 1 of the scope of patent application, wherein the first protective layer has a concave-convex contour on another surface opposite to the connecting portion. The display device according to item 1 of the scope of patent application, further comprising: a second flexible element substrate having a display portion, a driving element portion, and a connecting portion connecting the display portion and one of the driving element portions, The second flexible layer is disposed adjacent to the other surface of the first flexible element substrate opposite to the first protective layer; a second adhesive layer is disposed between the first flexible element substrate and the second flexible element substrate. And a second non-adhesive material layer disposed between the connection portion of the second flexible element substrate and the second adhesive layer. The display device according to item 6 of the scope of patent application, wherein the first non-adhesive material layer and the second non-adhesive material layer are arranged corresponding to each other. The display device according to item 6 of the scope of patent application, wherein the first non-adhesive material layer and the second non-adhesive material layer are arranged alternately with each other. The display device according to item 6 of the scope of patent application, further comprising: a second protective layer; and a third adhesive layer disposed between the second flexible element substrate and the second protective layer. The display device according to item 9 of the scope of patent application, wherein the first protective layer has a concave-convex contour on the other surface of the connection portion opposite to the first flexible element substrate. The display device according to item 1 of the application, wherein the first non-adhesive material layer includes powder. The display device according to item 1 of the scope of patent application, wherein the first non-adhesive material layer includes a fluororesin, a silicone resin, an acrylic resin, an epoxy resin, or a combination thereof. The display device according to item 1 of the scope of patent application, wherein the first non-adhesive material layer includes a conductive material, and the conductive material includes a metal, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide ( (AZO), indium alumina (AIO), indium oxide (InO), gallium oxide (GaO), indium gallium zinc oxide (IGZO), nano carbon tube, nano silver, or a combination thereof. The display device according to item 1 of the scope of patent application, wherein the first non-adhesive material layer is formed by performing a modification treatment step on the first adhesive layer. The display device according to item 1 of the scope of patent application, further comprising a second non-adhesive material layer disposed between the driving element portion of the first flexible element substrate and the first adhesive layer. The display device according to item 1 of the patent application scope further includes a second non-adhesive material layer, wherein the first flexible element substrate further has a peripheral region, the peripheral region surrounds the display portion, and the second non-adhesive material layer An adhesive material layer is disposed between the peripheral region of the first flexible element substrate and the first adhesive layer.