Display device

Abstract

The utility model provides a display device. The display device comprises a display panel, a flexible circuit board and a composite adhesive tape, the flexible circuit board is bound on the display panel, the composite adhesive tape comprises an adhesive tape main body, an insulating adhesive layer and an insulating support layer, a conductor layer in the adhesive tape main body forms an opening structure, the insulating adhesive layer is attached to a corresponding binding area in the opening structure and is bonded with the flexible circuit board, and the insulating support layer is bonded with the flexible circuit board. The insulating adhesive layer comprises a first part and a second part, the orthographic projection of the first part on the adhesive tape main body forms an open accommodating area, and the second part is located in the accommodating area and connected with the first part to divide the accommodating area into two sub-accommodating areas; the insulating supporting layer is attached to the interior of the opening structure and makes contact with the insulating rubber layer, the insulating supporting layer comprises a fourth part and a fifth part, the orthographic projection of the fourth part on the adhesive tape body corresponds to the sub-containing area, the fourth part is connected with the fifth part, the fifth part is arranged corresponding to the opening structure, and the side, facing the first part, of the fourth part is provided with a protruding part. The composite adhesive tape can improve the problem of touch failure.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a display device. Background Art

[0002] Liquid crystal display devices generally include a display panel and a backlight module disposed opposite to the display panel. A composite tape (cell tape) is generally disposed at the side edges of the display panel and the backlight module to bond the two. The composite tape can not only strengthen the stability of the display device, but also has an electrostatic shielding effect. However, the current composite tape still needs to be improved. Utility Model Content

[0003] This application is based on the inventor's discovery and understanding of the following facts and problems:

[0004] The inventors have found that during the current assembly process of a touch display device, the composite tape may cause the touch of the display device to fail. Specifically, for example, in a laptop computer, Figure 1 The display device includes a display panel 100 and a backlight module 200 located on the backlight side of the display panel 100, wherein the display panel 100 includes an array substrate 110 and a color film substrate 120 arranged in a box and a liquid crystal layer 130 located between the array substrate 110 and the color film substrate 120, a flexible circuit board 300 is bound to the side of the color film substrate 120 away from the array substrate 110, and one end of the composite tape 400 is attached to the color film substrate 120 (in order to illustrate the positional relationship of each film layer, Figure 1 It is a schematic diagram. In fact, one end of the composite tape is attached to the color film substrate) and extends toward the side end face of the display panel 100, and the other end is attached to the side of the backlight module 200 away from the display panel 100. When the composite tape 400 extends toward the side end face of the display panel 100, it is attached to the side of the flexible circuit board 300 away from the color film substrate 120. The side of the composite tape 400 away from the display panel 100 and the backlight module 200 is attached with the front-screen frame 500 (Part B). During the process of setting the front-screen frame on the client side, when the front-screen frame is pried up, the adhesive layer of the front-screen frame used to attach the composite tape will lift up the composite tape on the data binding side (DP side) (that is, the composite tape on the side where the flexible circuit board is located), and the composite tape will simultaneously lift up the flexible circuit board to which it is attached, causing the flexible circuit board to be peeled off from the color film substrate, thereby causing the touch wiring to break, causing touch failure in part of the display area.

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, in one aspect of the present application, the present application provides a display device. The display device includes: a display panel, the display panel having a binding area; a flexible circuit board, the flexible circuit board including a main body and a binding part connected to the main body, the binding part being bound and connected to the binding area; a composite tape, the composite tape being attached to a side of the flexible circuit board away from the display panel, the composite tape including a tape body, an insulating adhesive layer and an insulating support layer, wherein the tape body includes a conductor layer, the conductor layer having two connecting segments and a supporting segment, and the two ends of the supporting segment are respectively connected to one of the connecting segments to form an opening structure; the insulating adhesive layer is attached to one side of the conductor layer and is located in the opening structure corresponding to the binding area, the The insulating adhesive layer is bonded to the flexible circuit board, and the insulating adhesive layer includes a first part and a second part, wherein the orthographic projection of the first part on the tape body forms an open accommodation area, and the second part is located in the accommodation area and connected to the first part, dividing the accommodation area into two sub-accommodation areas; the insulating support layer is attached to one side of the conductor layer and is located in the opening structure and in contact with the insulating adhesive layer, and the insulating support layer includes a fourth part and a fifth part, wherein the orthographic projection of the fourth part on the tape body corresponds to the sub-accommodation area, the fourth part is connected to the fifth part, and the fifth part is arranged corresponding to the opening structure, and the fourth part has a protrusion on the side facing the first part. The present application increases the area of ​​the insulating support layer, that is, reduces the area of ​​the insulating adhesive layer. In the process of assembling the display device, when the front frame of the screen is pried up, the front frame of the screen lifts up the composite adhesive tape. Since the area of ​​the adhesive-free area of ​​the flexible circuit board is increased, the risk of peeling of the flexible circuit board is reduced, and the problem of touch failure is improved, and the solution does not increase the cost.

[0007] Furthermore, the orthographic projection of the fourth portion on the tape body is located at the connecting section, the insulating support layer includes two fourth portions, and the orthographic projection of the fifth portion on the tape body covers a portion of the connecting section and the supporting section.

[0008] Furthermore, the orthographic projection of the protrusion on the conductor layer is at least one of a triangle and a quadrilateral.

[0009] Furthermore, the two fourth portions both have the protruding portion, and the orthographic projection shapes of the plurality of protruding portions on the conductor layer are the same.

[0010] Furthermore, the insulating adhesive layer is a single-sided adhesive layer, and in the direction from the connecting section to the supporting section, the edge of the first part away from the second part is the upper edge of the first part, and the vertex or edge of the raised part close to the first part has a shortest distance from the upper edge of the first part of 0.3-2mm.

[0011] Furthermore, the side edge of the first portion is retracted by 0.3-10 mm compared to the corresponding side edge of the tape body.

[0012] Furthermore, the insulating adhesive layer is a single-sided adhesive layer, a coating is provided between the non-adhesive surface of the insulating adhesive layer and the tape body, and the dyne value of the coating is 36-44 dyn / cm.

[0013] Furthermore, the peeling force of the adhesive surface of the insulating adhesive layer is 600-1300g / 25mm.

[0014] Furthermore, the insulating support layer covers a portion of the surface of the main body and covers all edges of the main body that are not connected to the binding part, and the insulating glue layer covers the binding part and covers the portion of the main body that is not covered by the insulating support layer.

[0015] Furthermore, the main body portion includes a first main body portion and a second main body portion that are connected, the width of the first main body portion is greater than the width of the second main body portion to form a T-shaped structure, the binding portion is connected to the first main body portion, the fifth portion of the composite tape covers the second main body portion, the fourth portion and the raised portion of the composite tape cover a portion of the surface of the first main body portion, and the raised portion and the fourth portion cover the side edge of the first main body portion, the fourth portion covers the lower edge of the first main body portion, the lower edge of the first main body portion is the edge of the first main body portion away from the binding portion, the raised portion further covers the corner of the binding portion close to the first main body portion, the first portion covers the portion of the binding portion not covered by the insulating support layer, and the first portion and the second portion cover the portion of the first main body portion not covered by the insulating support layer.

[0016] Furthermore, the distance between the side edge of the second part and the corresponding side edge of the first main body part is 2-30 mm, and in the direction from the connecting section of the composite tape to the supporting section, the edge of the second part close to the first part is the upper edge of the second part, and the edge of the first part away from the second part is the upper edge of the first part, and the distance between the upper edge of the second part and the upper edge of the first part is 0.5-5 mm.

[0017] Furthermore, the distances between the side edges of the raised portion and the fourth portion and the corresponding side edges of the first main portion are respectively 0-20 mm, the edge of the fourth portion away from the raised portion is the lower edge of the fourth portion, and the distance between the lower edge of the fourth portion and the lower edge of the first main portion is 0-10 mm.

[0018] Further, the orthographic projection of the raised portion on the tape body is a triangle, and the distance between the vertex of the raised portion in the area where the first main portion is located and the corresponding side edge of the first main portion is 0.3-10mm; or, the orthographic projection of the raised portion on the tape body is a quadrilateral, and along the direction in which the first portion, the second portion and the fifth portion are arranged in sequence, the edge of the raised portion close to the binding portion is parallel to the edge away from the binding portion, the distance between the vertex of the raised portion in the area where the first main portion is located and the corresponding side edge of the first main portion is 0.3-10mm, and the distance between the vertex of the raised portion in the area where the binding portion is located and the corresponding side edge of the binding portion is 0.3-10mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a display device in the related art;

[0020] Figure 2 It is a structural schematic diagram of a composite tape in the related art;

[0021] Figure 3 It is a top view schematic diagram of a composite tape attached to a flexible circuit board in the related art;

[0022] Figure 4 is a top view schematic diagram of a composite tape attached to a flexible circuit board according to an embodiment of the present application;

[0023] Figure 5 is a top view schematic diagram of a composite tape attached to a flexible circuit board according to another embodiment of the present application;

[0024] Figure 6 is a top view schematic diagram of a composite tape attached to a flexible circuit board according to another embodiment of the present application;

[0025] Figure 7 is a top view schematic diagram of a composite tape attached to a flexible circuit board according to another embodiment of the present application;

[0026] Figure 8 is a schematic structural diagram of a composite tape according to an embodiment of the present application;

[0027] Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present application;

[0028] Fig.10 This is a schematic diagram of the dimensions of the relative positions of the composite tape and the flexible circuit board in one embodiment of the present application;

[0029] Fig.11 is a schematic diagram of the dimensions of the relative positions of the composite tape and the flexible circuit board in another embodiment of the present application;

[0030] Fig.12 The figure is a top view schematic diagram of a composite tape attached to a display panel according to an embodiment of the present application.

[0031] Reference numerals:

[0032] 100: display panel; 110: array substrate; 120: color film substrate; 130: liquid crystal layer; 140: first polarizer; 150: second polarizer; 200: backlight module; 300: flexible circuit board; 310: binding part; 320: first main body; 330: second main body; 400: composite tape; 410: tape body; 411: conductive layer; 412: adhesive layer; 420: insulating adhesive layer; 421: first part; 422: second part; 430: insulating support layer; 431: raised part; 432: fourth part; 433: fifth part; 440: coating; 500: front frame; 600: printed circuit board; 10: overlapping area. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below. The embodiments described below are exemplary and are only used to explain the present application, and cannot be construed as limiting the present application. If no specific technology or conditions are specified in the embodiments, the technology or conditions described in the literature in the art or the product specification are used.

[0034] For ease of understanding, the relative position relationship between the composite tape and the flexible circuit board in the related art is briefly described below:

[0035] refer to Figure 2 The composite tape 400 includes a tape body 410, an insulating adhesive layer 420 and an insulating support layer 430, wherein the tape body 410 includes a conductor layer 411 and an adhesive layer 412 located on one side of the conductor layer 411, the insulating adhesive layer 420 and the insulating support layer 430 are both located on the side of the adhesive layer 412 away from the conductor layer 411, and the insulating support layer 430 is adjacent to and in contact with the insulating adhesive layer 420. The current flexible circuit board is usually in a T-shaped shape, referring to Figure 3, the flexible circuit board (the structure shown by the dotted line in the figure) includes a binding part 310 and a main body part. The main body part includes a first main body part 320 and a second main body part 330 that are connected. The width (dimension along the X direction) of the first main body part 320 is greater than the width (dimension along the X direction) of the second main body part 330 to form a T-shaped structure. The binding part 310 is connected to the first main body part 320. The insulating support layer 430 covers the second main body part 330 and extends to one side of the first main body part 320 to cover the middle area of ​​the first main body part 320. The insulating adhesive layer 420 is in the shape of a U-shaped, covering the binding part 310 and covering the part of the first main body part 320 that is not covered by the insulating support layer 430. The insulating adhesive layer 420 covers the corners of the first main body part 320, and the two corners of the first main body part 320 away from the binding part 310 are easily lifted by the insulating adhesive layer 420, and then the binding part 310 is easily lifted, resulting in the flexible circuit board being separated from the color film substrate ( Figure 3 The touch screen may peel off (not shown), thereby causing the touch line to break and causing touch failure in part of the display area.

[0036] To this end, in one aspect of the present application, the present application provides a display device. In some embodiments of the present application, reference is made to Fig. 9 The display device includes a display panel 100, a flexible circuit board 300 and a composite tape 400, wherein the display panel 100 has a binding area (i.e., an area where the flexible circuit board 300 is connected to the display panel 100), and the flexible circuit board 300 includes a main body and a binding part 310 connected to the main body (e.g., Figure 4 As shown in FIG. 1 , the binding portion 310 is bound and connected to the binding area of ​​the display panel 100, and the composite tape 400 is attached to the side of the flexible circuit board 300 away from the display panel 100. The composite tape 400 includes a tape body 410, an insulating adhesive layer 420 and an insulating support layer 430, wherein the tape body 410 includes a conductor layer 411 and an adhesive layer 412 located on one side of the conductor layer 411, and the conductor layer 411 may also have a Figure 1 The composite tape 400 and the B part (500) constitute an opening structure, which is used to accommodate and fix the display device. The conductor layer 411 has two connecting sections and a supporting section, and the two ends of the supporting section are respectively connected to a connecting section to form an opening structure. The insulating adhesive layer 420 and the insulating supporting layer 430 are both located on the side of the adhesive layer 412 away from the conductor layer 411, and the insulating supporting layer 430 is adjacent to and in contact with the insulating adhesive layer 420. The insulating adhesive layer 420 and the insulating supporting layer 430 are both located in the opening structure, and the insulating adhesive layer 420 corresponds to the binding area and is bonded to the flexible circuit board 300. Reference Figure 4 The insulating adhesive layer includes a first portion 421 and a second portion 422. The first portion 421 is formed on the adhesive tape body 410 ( Figure 4(not shown in the figure, the plane where the tape body 410 is located is the plane formed by the X direction and the Y direction), a positive projection on it forms an open receiving area, which can be in the shape of a "冖" for example. The second part 422 is located in the above-mentioned receiving area and is connected to the first part 421, and divides the above-mentioned receiving area into two sub-receiving areas (that is, the area where the fourth part 432 is located). The insulating support layer includes a fourth part 432 and a fifth part 433. The positive projection of the fourth part 432 on the tape body corresponds to the sub-receiving area. The fourth part 432 is connected to the fifth part 433. The fifth part 433 is arranged corresponding to the opening structure. The side of the fourth part 432 facing the first part 421 has a protrusion 431. Thus, the area of the insulating support layer is increased, that is, the area of the insulating glue layer is reduced. During the process of assembling the display device, when prying up the front frame of the screen, the front frame of the screen will lift the composite tape. Since the area of the non-glue area of the flexible circuit board is increased, the risk of peeling of the flexible circuit board is reduced, the problem of touch failure is improved, and this solution does not increase the cost.

[0037] When attaching the composite tape to the display panel and the backlight module, the composite tape 400 will be attached to the flexible circuit board 300 (as Fig. 9 shown), so that the insulating support layer of the composite tape (such as the protrusion 431, the fourth part 432 and the fifth part 433 shown in Figure 4 ) covers a part of the surface of the flexible circuit board main body (such as the first main body part 320 and the second main body part 330 shown in Figure 4 constitute the main body part), and covers all the edges of the main body part not connected to the binding part 310. The insulating glue layer of the composite tape (such as the first part 421 and the second part 422 shown in Figure 4 ) covers the binding part 310 and covers the part of the main body part not covered by the insulating support layer. That is, the part of the insulating support layer covering the main body part includes the corners of the main body part, and all the corners of the main body part are covered by the insulating support layer. In other words, the corner areas of the main body part are all non-glue areas. Compared with the solution in the related art (such as Figure 3 shown), the area of the insulating support layer in the edge area of the flexible circuit board is increased in this application, that is, the area of the insulating glue layer in the edge area of the flexible circuit board is reduced. During the process of assembling the display device, when prying up the front frame of the screen, the front frame of the screen will lift the composite tape. Since the corner area of the main body part is a non-glue area, the composite tape cannot directly lift the corner area of the main body part, thereby reducing the risk of peeling of the flexible circuit board and improving the problem of touch failure, and this solution does not increase the cost.

[0038] In some specific embodiments, the orthographic projection of the fourth portion 432 on the tape body is located in the connecting section, the insulating support layer includes two fourth portions 432 and one fifth portion 433, and the orthographic projection of the fifth portion on the tape body covers a portion of the connecting section and the supporting section. In other words, the fifth portion 433 is located on the side of the second portion 422 away from the first portion 421, the two fourth portions 432 are respectively located in the above-mentioned two sub-accommodation areas, and are respectively connected to the fifth portion 433, along the direction in which the first portion 421, the second portion 422 and the fifth portion 433 are arranged in sequence (i.e., the Y direction), the first portion 421 has a notch (i.e., the area where the raised portion 431 is located) on the side facing the fourth portion 432, the raised portion 431 is located in the above-mentioned notch, and the side edge of the raised portion 431 close to the second portion 422 is located between the two side edges of the fourth portion 432.

[0039] In this application, reference is made to Figure 4 The main body of the flexible circuit board includes a first main body 320 and a second main body 330 connected to each other. The width (dimension along the X direction) of the first main body 320 is greater than the width (dimension along the X direction) of the second main body 330 to form a T-shaped structure. The binding part 310 is connected to the first main body 320. The fifth part 433 covers the second main body 330, the raised part 431 and the fourth part 432 cover part of the surface of the first main body 320, and the raised part 431 and the fourth part 432 cover the side edge of the first main body 320, and the fourth part 432 covers the lower edge of the first main body 320. The lower edge of the first main body 320 is the edge of the first main body 320 away from the binding part 310. The first part 421 covers the binding part 310, and the first part 421 and the second part 422 cover the part of the first main body 320 that is not covered by the insulating support layer. As a result, the corner areas of the main body of the flexible circuit board are all glue-free areas, which can reduce the risk of peeling of the flexible circuit board and improve the problem of touch failure.

[0040] In this application, reference is made to Figure 4 The first part 421 covers the binding part 310 and a part of the first main body part 320, and the second part 422 covers a part of the first main body part 320. Since the area of ​​the non-glue area of ​​the composite tape in the area where the flexible circuit board is located increases, the second part 422 can increase the adhesion of the composite tape to the flexible circuit board and prevent the composite tape from warping due to the increase in the area of ​​the non-glue area.

[0041] In this application, reference is made to Figure 4The side edge of the raised portion 431 close to the second portion 422 is located between the two side edges of the fourth portion 432. While the raised portion 431 covers the corner of the first main portion 320 close to the binding portion 310, the raised portion 431 will not cover too large an area of ​​the first main portion 320, so that a larger covering area is reserved for the first portion 421 to cover the first main portion 320, thereby preventing the composite tape from warping due to the increase in the area of ​​the non-glue area.

[0042] In other embodiments of the present application, reference Figure 5-Figure 7 , the fifth part 433 covers the second main body part 330, the raised part 431 and the fourth part 432 cover part of the surface of the first main body part 320, and the raised part 431 and the fourth part 432 cover the side edge of the first main body part 320, the fourth part 432 covers the lower edge of the first main body part 320, the raised part 431 further covers the corner of the binding part 310 close to the first main body part 320, the first part 421 covers the part of the binding part 310 not covered by the insulating support layer, and the first part 421 and the second part 422 cover the part of the first main body part 320 not covered by the insulating support layer. On the basis of the insulating support layer covering the corner of the main body, the insulating support layer further covers the corner of the binding part, and increases the area of ​​the non-glue area of ​​the flexible circuit board in the Y direction, that is, when the composite tape does not warp, the area of ​​the non-glue area of ​​the flexible circuit board corner is increased as much as possible. Since the flexible circuit board generates a connection force with the color film substrate through the binding part, the non-glue area is extended to the corner of the binding part, which can significantly reduce the risk of the flexible circuit board peeling, thereby significantly improving the problem of touch failure.

[0043] In some embodiments of the present application, the orthographic projection shape of the protrusion 431 on the tape body 410 may include a triangle or a quadrilateral. Figure 5 and Figure 6 , the shape of the protrusion 431 is triangular. In the direction from the connecting section to the supporting section, that is, in the Y direction, the vertex D (such as Figure 5 The specific position of the protrusion 431 is not particularly limited, as long as the protrusion 431 covers the corner of the binding portion 310 close to the first main body 320. For example, the positive projection of the vertex D on the flexible circuit board is located on the side edge of the corresponding side of the binding portion 310. There is no particular limitation on whether the side edge of the protrusion 431 and the side of the fourth portion 432 away from the second portion 422 are collinear. For example, refer to Figure 5 , the side edges of the protruding portion 431 and the fourth portion 432 away from the second portion 422 are not collinear, or, with reference to Figure 6 The side edge of the protruding portion 431 and the fourth portion 432 away from the second portion 422 are collinear.

[0044] refer to Figure 7, the shape of the protrusion 431 is a quadrilateral, specifically a trapezoid. Similarly, when the shape of the protrusion 431 is a trapezoid, the side edges of the protrusion 431 and the fourth portion 432 away from the second portion 422 can be collinear (such as Figure 7 as shown), they may not be collinear.

[0045] In some embodiments of the present application, reference Fig. 9 and Figure 4 The orthographic projection of the fourth portion 432 on the tape body is located at the connecting section, the insulating support layer 430 includes two fourth portions 432, and the orthographic projection of the fifth portion 433 on the tape body covers a part of the connecting section and the supporting section. Figure 4 , the two fourth portions 432 both have a protruding portion 431 , and the orthographic projection shapes of the plurality of protruding portions 431 on the conductor layer are the same.

[0046] In some embodiments of the present application, along the Y direction, the edge of the second portion 422 away from the first portion 421 is the lower edge of the second portion 422, and the orthographic projection of the lower edge of the second portion 422 on the flexible circuit board can be collinear with the lower edge of the first main body portion 320 (e.g. Figure 4 As shown), or, the orthographic projection of the lower edge of the second portion 422 on the flexible circuit board is located in the area where the first main body portion 320 is located. At this time, the fifth portion 433 not only covers the second main body portion 330, but also extends to one side of the first main body portion 320 and covers the area of ​​the first main body portion 320 surrounded by the second portion 422 and the fourth portion 432 (as shown Figure 6 shown).

[0047] In some embodiments of the present application, along the direction in which the first portion 421, the second portion 422, and the fifth portion 433 are arranged in sequence (i.e., along the Y direction), the edge of the first portion 421 away from the second portion 422 is the upper edge of the first portion 421, and the shortest distance d1 (e.g., the shortest distance d2) between the vertex or edge of the protrusion 431 close to the first portion 421 and the upper edge of the first portion 421 is Fig.10 and 11 The distance between the composite tape and the adhesive tape can be 0.3-2 mm, such as 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm. At the above distance, the composite tape can be effectively pasted to prevent the composite tape from warping.

[0048] In some embodiments of the present application, the side edge of the first portion 421 is retracted by 0.3-10 mm, for example, 0.3 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm, compared to the corresponding side edge of the tape body 410. Fig. 9 and Fig.12, one end of the composite tape 400 is attached to the color film substrate 120, and the composite tape on the DP side and the composite tape on the left and right sides (along the X direction) overlap in the corner area of ​​the color film substrate 120 to form an overlap area 10, so that the side edge of the first part 421 (i.e., the edge along the X direction) is 0.3-10mm inward compared to the corresponding side edge of the tape body 410 (i.e., the edge along the X direction), which can prevent the thickness of the composite tape on the DP side and the composite tape on the left and right sides at the overlap area 10 from exceeding the thickness of the first polarizer 140 located on the side of the color film substrate 120 away from the array substrate 110. It should be noted that in order to illustrate the positional relationship of each film layer, Fig. 9 It is a schematic diagram. In fact, one end of the composite tape is attached to the color film substrate.

[0049] In some embodiments of the present application, the insulating adhesive layer 420 may be a double-sided adhesive layer. Figure 8 , the insulating adhesive layer 420 is a single-sided adhesive layer, and a coating 440 is provided between the non-adhesive surface of the insulating adhesive layer 420 and the adhesive layer 412, and the dyne value of the coating 440 can be 36-44dyn / cm, such as 36dyn / cm, 38dyn / cm, 40dyn / cm, 42dyn / cm, and 44dyn / cm. That is, a coating with a lower dyne value is provided on the non-adhesive surface of the insulating adhesive layer to reduce the dyne value of the non-adhesive surface of the insulating adhesive layer. When the front frame of the screen is pried up, even if the front frame of the screen lifts up the composite tape, due to the lower dyne value of the non-adhesive surface of the insulating adhesive layer, in other words, the non-adhesive surface of the insulating adhesive layer is relatively smooth, which makes it easy for the tape body of the composite tape to separate from the insulating adhesive layer, thereby failing to lift up the flexible circuit board. The scheme of this embodiment is combined with the aforementioned scheme of increasing the area of ​​the non-adhesive area of ​​the flexible circuit board, which can further reduce the risk of the flexible circuit board being peeled off.

[0050] In some embodiments of the present application, the material of the coating layer 440 may include ink, so that the coating layer has a lower dyne value.

[0051] In some embodiments of the present application, the peeling force of the adhesive surface of the insulating adhesive layer 420 can be 600-1300g / 25mm, for example, 600g / 25mm, 700g / 25mm, 800g / 25mm, 900g / 25mm, 1000g / 25mm, 1100g / 25mm, 1200g / 25mm, 1300g / 25mm. Therefore, by using an adhesive material with a lower peeling force to form the insulating adhesive layer, the adhesion of the insulating adhesive layer to the flexible circuit board can be reduced. When the front frame of the screen is pried up, even if the front frame of the screen lifts up the composite tape, the risk of the flexible circuit board being peeled off can be reduced due to the lower adhesion of the insulating adhesive layer to the flexible circuit board. According to a preferred embodiment of the present application, the peeling force of the adhesive surface of the insulating adhesive layer 420 is 600-800g / 25mm, and the above peeling force value is lower than the connection force value between the flexible circuit board and the color film substrate, so that the composite tape cannot lift up the flexible circuit board, further reducing the risk of the flexible circuit board being peeled off. In this embodiment, the insulating adhesive layer may be a double-sided adhesive layer or a single-sided adhesive layer.

[0052] In some embodiments of the present application, the material of the insulating adhesive layer 420 may include an acrylic copolymer so that the adhesive surface of the insulating adhesive layer obtains a lower peeling force. The material of the insulating support layer 430 may include polyethylene terephthalate (PET). The conductor layer 411 may include aluminum foil or copper foil, and the adhesive layer 412 may include conductive adhesive.

[0053] In some embodiments of the present application, reference Fig.10 and Fig.11 , the distance d2 between the side edge of the second part 422 (i.e., the edge along the X direction) and the corresponding side edge of the first main body part 320 (i.e., the edge along the X direction) can be 2-30mm, such as 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm. And along the Y direction, the edge of the second part 422 close to the first part 421 is the upper edge of the second part 422, and the edge of the first part 421 away from the second part 422 is the upper edge of the first part 421. The distance d3 between the upper edge of the second part 422 and the upper edge of the first part 421 can be 0.5-5mm, such as 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm. In this way, the adhesion of the composite tape to the flexible circuit board can be increased, and the composite tape can be prevented from warping due to the increase in the area of ​​the adhesive-free area.

[0054] In some embodiments of the present application, reference Fig.10 and Fig.11, the raised portion 431 and the fourth portion 432 cover the side edge of the first main body 320, and the distance d4 between the side edge of the raised portion 431 and the fourth portion 432 (i.e., the edge along the X direction) and the corresponding side edge of the first main body 320 (i.e., the edge along the X direction) can be 0-20mm, for example, 0mm, 1mm, 5mm, 10mm, 15mm, 20mm. And the fourth portion 432 covers the lower edge of the first main body 320, the edge of the fourth portion 432 away from the raised portion 431 is the lower edge of the fourth portion 432, and the distance d5 between the lower edge of the fourth portion 432 and the lower edge of the first main body 320 can be 0-10mm, for example, 0mm, 0.3mm, 1mm, 3mm, 5mm, 8mm, 10mm. Thus, the raised portion and the fourth portion can cover the side edge of the first main body, and the fourth portion can cover the lower edge of the first main body to prevent the insulating adhesive layer from being attached to the edge of the first main body.

[0055] In some embodiments of the present application, reference Fig.10 , the orthographic projection of the raised portion 431 on the tape body (i.e., the orthographic projection of the raised portion 431 on the plane formed by the X direction and the Y direction) is in the shape of a triangle, and the distance d6 between the vertex A of the raised portion 431 in the area where the first main body 320 is located and the corresponding side edge of the first main body 320 can be 0.3-10mm, for example, 0.3mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm. Thus, the raised portion 431 can cover the corner of the first main body 320 close to the binding portion 310, and the corner of the binding portion 310 close to the first main body 320, and the area covered by the raised portion 431 on the first main body 320 will not be too large, so that a larger coverage area is reserved for the first portion 421 to cover the first main body 320, thereby preventing the composite tape from warping due to the increase in the area of ​​the adhesive-free area.

[0056] In other embodiments of the present application, reference Fig.11, the orthographic projection of the protrusion 431 on the tape body (i.e., the orthographic projection of the protrusion 431 on the plane formed by the X direction and the Y direction) is in the shape of a quadrilateral, along the Y direction, the edge of the protrusion 431 close to the binding part 310 is parallel to the edge away from the binding part 310, and the distance d7 between the vertex B of the protrusion 431 in the area where the first main body 320 is located and the corresponding side edge of the first main body 320 can be 0.3-10mm, such as 0.3mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm. And the distance d8 between the vertex C of the protrusion 431 in the area where the binding part 310 is located and the corresponding side edge of the binding part 310 can be 0.3-10mm, such as 0.3mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm. Thus, the raised portion 431 can cover the corner of the first main body portion 320 close to the binding portion 310, and cover the corner of the binding portion 310 close to the first main body portion 320, and will not make the raised portion 431 cover too large an area of ​​the first main body portion 320 and the binding portion 310, so that a larger coverage area is reserved for the first portion 421 to cover the first main body portion 320 and the binding portion 310, thereby preventing the composite tape from warping due to the increase in the area of ​​the non-glue area.

[0057] According to the specific embodiments of this application, Fig.11 The shape of the protrusion 431 is trapezoidal, the distance d7 between the vertex B of the protrusion 431 and the corresponding side edge of the first main body 320 can be 0.3-10mm, and the distance d8 between the vertex C of the protrusion 431 and the corresponding side edge of the binding part 310 can be 0.3-5mm.

[0058] The flexible circuit board 300 may be a chip-on-film with a driving chip.

[0059] In some embodiments of the present application, reference Fig. 9The display panel 100 may include an array substrate 110 and a color film substrate 120 arranged in a box, and a liquid crystal layer 130 located between the array substrate 110 and the color film substrate 120. A sealant (not shown in the figure) is arranged between the array substrate 110 and the color film substrate 120. The liquid crystal layer 130 is sealed in the area surrounded by the sealant. The binding portion of the flexible circuit board 300 is bound to the color film substrate 120. One end of the composite tape 400 is attached to the color film substrate 120 and extends to one side of the side end surface of the display panel 100, and the other end is attached to the backlight. The module 200 is away from the side of the display panel 100, and the composite tape 400 is attached to the backlight module 200 through the adhesive layer 412. When the composite tape 400 extends toward the side end surface of the display panel 100, it is attached to the side of the flexible circuit board 300 away from the color film substrate 120. The other end of the flexible circuit board 300 is electrically connected to the printed circuit board 600. A first polarizer 140 is provided on the side of the display panel 100 away from the backlight module 200, and a second polarizer 150 is provided on the side of the display panel 100 facing the backlight module 200.

[0060] According to the embodiments of the present application, there are no special requirements for the specific type of the display device, and technical personnel in this field can flexibly select according to actual needs. For example, the display device can be a TV, a laptop computer, an iPad, a game console, a kindle, a car display device, and all other devices and equipment with a display function.

[0061] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A display device, characterized in that: include: A display panel, wherein the display panel has a binding area; A flexible circuit board, the flexible circuit board comprising a main body and a binding part connected to the main body, the binding part being bound and connected to the binding area; A composite tape, wherein the composite tape is attached to a side of the flexible circuit board away from the display panel, and the composite tape comprises a tape body, an insulating adhesive layer and an insulating support layer, wherein: The tape body comprises a conductor layer, the conductor layer has two connecting segments and a supporting segment, and two ends of the supporting segment are respectively connected to one of the connecting segments to form an open structure; The insulating adhesive layer is attached to one side of the conductor layer and is located in the opening structure corresponding to the binding area. The insulating adhesive layer is bonded to the flexible circuit board. The insulating adhesive layer includes a first portion and a second portion. The first portion is projected onto the tape body to form an open receiving area. The second portion is located in the receiving area and connected to the first portion, dividing the receiving area into two sub-receiving areas. The insulating support layer is attached to one side of the conductor layer and is located in the opening structure and in contact with the insulating rubber layer. The insulating support layer includes a fourth part and a fifth part. The orthographic projection of the fourth part on the tape body corresponds to the sub-accommodating area. The fourth part and the fifth part are connected. The fifth part is arranged corresponding to the opening structure. The fourth part has a protrusion on the side facing the first part.

2. The display device according to claim 1, characterized in that The orthographic projection of the fourth portion on the tape body is located at the connecting section, the insulating support layer includes two fourth portions, and the orthographic projection of the fifth portion on the tape body covers a portion of the connecting section and the supporting section.

3. The display device according to claim 2, characterized in that: The orthographic projection of the protrusion on the conductor layer is at least one of a triangle and a quadrilateral.

4. The display device according to claim 3, characterized in that: The two fourth portions both have the protruding portion, and the orthographic projection shapes of the plurality of protruding portions on the conductor layer are the same.

5. The display device according to claim 4, characterized in that: In the direction from the connecting section to the supporting section, the edge of the first part away from the second part is the upper edge of the first part, and the shortest distance between the vertex or edge of the raised part close to the first part and the upper edge of the first part is 0.3-2mm.

6. The display device according to any one of claims 1 to 5, characterized in that: The side edge of the first portion is retracted by 0.3-10 mm compared to the corresponding side edge of the tape body.

7. The display device according to claim 1, characterized in that The insulating adhesive layer is a single-sided adhesive layer, a coating is provided between the non-adhesive surface of the insulating adhesive layer and the tape body, and the dyne value of the coating is 36-44 dyn / cm.

8. The display device according to claim 7, characterized in that: The peeling force of the adhesive surface of the insulating adhesive layer is 600-1300g / 25mm.

9. The display device according to claim 1, characterized in that: The insulating support layer covers a portion of the surface of the main body and covers all edges of the main body that are not connected to the binding part. The insulating glue layer covers the binding part and covers the portion of the main body that is not covered by the insulating support layer.

10. The display device according to claim 9, characterized in that: The main body portion includes a first main body portion and a second main body portion connected to each other, the width of the first main body portion is greater than the width of the second main body portion to form a T-shaped structure, and the binding portion is connected to the first main body portion. The fifth part of the composite tape covers the second main body part, the fourth part of the composite tape and the raised part cover a part of the surface of the first main body part, and the raised part and the fourth part cover the side edge of the first main body part, the fourth part covers the lower edge of the first main body part, the lower edge of the first main body part is the edge of the first main body part away from the binding part, and the raised part further covers the corner of the binding part close to the first main body part. The first portion of the composite tape covers the portion of the binding portion not covered by the insulating support layer, and the first portion and the second portion of the composite tape cover the portion of the first main body portion not covered by the insulating support layer.

11. The display device according to claim 10, characterized in that: The distance between the side edge of the second part and the corresponding side edge of the first main body part is 2-30 mm, In the direction from the connecting section of the composite tape to the supporting section, the edge of the second part close to the first part is the upper edge of the second part, the edge of the first part away from the second part is the upper edge of the first part, and the distance between the upper edge of the second part and the upper edge of the first part is 0.5-5mm.

12. The display device according to claim 10, characterized in that: The distances between the side edges of the protruding portion and the fourth portion and the corresponding side edges of the first main portion are 0-20 mm respectively. An edge of the fourth portion away from the protruding portion is a lower edge of the fourth portion, and a distance between the lower edge of the fourth portion and the lower edge of the first main body portion is 0-10 mm.

13. The display device according to claim 10, characterized in that: The orthographic projection of the protrusion on the tape body is a triangle, and the distance between the vertex of the protrusion located in the area where the first main body is located and the corresponding side edge of the first main body is 0.3-10 mm; Alternatively, the orthographic projection of the raised portion on the tape body is a quadrilateral, and along the direction in which the first portion, the second portion and the fifth portion are arranged in sequence, the edge of the raised portion close to the binding portion is parallel to the edge away from the binding portion, and the distance between the vertex of the raised portion in the area where the first main portion is located and the corresponding side edge of the first main portion is 0.3-10mm, and the distance between the vertex of the raised portion in the area where the binding portion is located and the corresponding side edge of the binding portion is 0.3-10mm.

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