Cover tape, use method thereof, and display device

Abstract

The embodiments of the present application provide a cover tape, a method for using the same, and a display device. The cover tape includes a stacked base film and a protective film, and a composite structure layer between the protective film and the base film; the orthographic projection of the protective film on the plane where the cover tape is located covers the orthographic projection of the composite structure layer; the composite structure layer includes an antistatic material; the cover tape also includes a double-sided adhesive layer between the protective film and the base film, and the protective film and the base film are bonded and connected via the double-sided adhesive layer. The cover tape provided in the embodiments of the present application integrates the cover tape structure and the pre-fixed film structure of the related technology, simplifies the overall production process and installation process of the product, does not require two alignments, has higher alignment accuracy and lower production costs.

Description

Technical Field

[0001] The present invention relates to but is not limited to the field of display technology, and in particular to a cover tape and a method for using the same, and a display device. Background Art

[0002] Static electricity is an objective natural phenomenon with the characteristics of high voltage, low power, small current and short action time, which can easily cause great damage and harm to the quality of electronic products. In the process of OLED (Organic Light-Emitting Diode) vehicle display module, some components such as TCON-PCB board (Timer Control Register-Printed Circuit Board, driver circuit board) need to pay special attention to ESD (Electro-Static discharge) protection. TCON-PCB board also needs to be temporarily fixed on the support structure to avoid interference with the equipment mechanism during the process and damage during transportation.

[0003] In the current traditional OLED car display module design, the TCON-PCB board needs to be raised and fixed on the client host to avoid temperature rise affecting the screen life. Therefore, in the module process, the IC Cover Tape and the pre-fixing film need to be attached separately. The IC Cover Tape always remains on the TCON-PCB board, and the pre-fixing film needs to be torn off on the client host. The existing pre-fixing film faces problems such as difficult to tear off, complex alignment, and high cost. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] Embodiments of the present application provide a cover tape, a method for using the cover tape, and a display device.

[0006] The embodiment of the present application provides a cover tape. The cover tape comprises a base film and a protective film which are stacked, and a composite structure layer located between the protective film and the base film; the orthographic projection of the protective film on the plane where the cover tape is located covers the orthographic projection of the composite structure layer; the composite structure layer comprises an antistatic material;

[0007] The cover tape also includes a double-sided adhesive layer arranged between the protective film and the base film, and the protective film and the base film are bonded and connected via the double-sided adhesive layer.

[0008] In an exemplary embodiment, the protective film includes a first edge and a second edge disposed opposite to each other along a first direction;

[0009] The protection film is provided with a notch at at least one of the first edge and the second edge.

[0010] In an exemplary embodiment, the notch provided on the first edge of the protective film is recorded as a first notch, and the notch provided on the second edge of the protective film is recorded as a second notch, and the first notch and the second notch are arranged opposite to each other.

[0011] In an exemplary embodiment, the bonding strength between the double-sided adhesive layer and one side of the protective film is greater than the bonding strength between the double-sided adhesive layer and one side of the base film.

[0012] In an exemplary embodiment, the double-sided adhesive layer includes a first adhesive strip and a second adhesive strip spaced apart along the second direction;

[0013] The orthographic projections of the first adhesive strip and the second adhesive strip on the plane where the cover adhesive tape is located are arranged on both sides of the orthographic projection of the notch on the plane where the cover adhesive tape is located;

[0014] The first direction and the second direction intersect, and the plane formed by them is parallel to the plane where the cover tape is located.

[0015] In an exemplary embodiment, along the thickness direction of the cover tape, a side of the composite structure layer close to the base film does not exceed a side of the double-sided adhesive layer close to the base film.

[0016] In an exemplary embodiment, the composite structure layer includes a conductive cloth layer and a Mylar glue layer; the conductive cloth layer is closer to the protective film than the Mylar glue layer; the orthographic projection of the conductive cloth layer on the plane where the cover tape is located at least partially overlaps with the orthographic projection of the Mylar glue layer on the plane where the cover tape is located.

[0017] In an exemplary embodiment, the cover tape further includes an alignment mark; the alignment mark is disposed between the base film and the protective film;

[0018] The protective film is a transparent film; the alignment mark is a black film layer and is arranged on the same layer as the double-sided adhesive layer.

[0019] In an exemplary embodiment, the cover tape further includes a hand-tear portion; the hand-tear portion is connected to the protective film and extends in a direction away from the protective film;

[0020] The orthographic projection of the hand-tear portion on the plane where the cover tape is located does not overlap with the orthographic projection of the double-sided adhesive layer on the plane where the cover tape is located.

[0021] In an exemplary embodiment, the protective film further includes a third edge connecting the first edge and the second edge; and the hand-tear portion is connected to the third edge.

[0022] The present application embodiment provides a method for using a cover tape, which is applied to the cover tape described in any of the above embodiments; the method for using includes:

[0023] The base film is peeled off, and the cover tape except the base film is bonded to a fixed component;

[0024] The protective film and the double-sided adhesive layer are peeled off, so that the composite structure layer is retained on the fixing component.

[0025] In an exemplary embodiment, in a structure in which the cover tape is provided with an alignment mark, the alignment mark is retained on the fixing component; or the alignment mark is torn off together with the protective film.

[0026] An embodiment of the present application provides a display device, including a circuit board and the cover tape described in any of the above embodiments;

[0027] The cover tape is adhered to the circuit board after the base film is torn off.

[0028] The embodiment of the present application provides a cover tape that integrates the cover tape structure and the pre-fixed film structure of the related technology, simplifies the overall production process and installation process of the product, does not require two alignments, has higher alignment accuracy and lower production costs.

[0029] It is not necessary to achieve all the advantages described above at the same time for any product or method of the present invention to be implemented. Other features and advantages of the present invention will be described in the subsequent description embodiments, and partly become apparent from the description embodiments, or be understood by practicing the present invention. The purposes and other advantages of the embodiments of the present application can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the contents of the present invention.

[0031] Figure 1 A structure of a cover tape used in a display device;

[0032] Figure 2 for Figure 1A schematic cross-sectional view of the cover tape at the mark A shown;

[0033] Figure 3 A structure for a pre-fixed film used in a display device;

[0034] Figure 4 for Figure 3 A schematic cross-sectional view of the pre-fixed membrane at the mark B shown;

[0035] Figure 5 A schematic top view of the cover tape of an embodiment of the present application;

[0036] Figure 6 for Figure 5 A schematic cross-sectional view of the cover tape at the mark C shown;

[0037] Figure 7 Partial attachment effect of a display device using the cover tape of an embodiment of the present application Figure 1 ;

[0038] Figure 8 Partial attachment effect of a display device using the cover tape of an embodiment of the present application Figure 2 .

[0039] Description of reference numerals:

[0040] 10-cover tape, 101-first base film, 102-mylar adhesive, 103-conductive cloth, 104-first transfer film, 105-first alignment hole;

[0041] 20-pre-fixed film, 201-second base film, 202-protective film, 203-second transfer film, 204-second alignment hole;

[0042] 30-cover tape, 301-base film, 302-protective film, 302a-first edge, 302b-second edge, 302c-third edge, 303-first notch, 304-second notch, 305-hand-tear portion, 306-first adhesive strip, 307-second adhesive strip, 308-alignment mark, 309-conductive fabric layer, 310-mylar adhesive layer;

[0043] 40 - first central axis, 50 - second central axis, 60 - circuit board, 70 - support member. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The embodiments can be implemented in a plurality of different forms. A person of ordinary skill in the art can easily understand the fact that the method and content can be transformed into one or more forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0045] In the drawings, the size of one or more components, the thickness of a layer, or an area is sometimes exaggerated for the sake of clarity. Therefore, one embodiment of the present disclosure is not necessarily limited to the size, and the shape and size of each component in the drawings do not reflect the true proportion. In addition, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes or values ​​shown in the drawings.

[0046] The ordinal numbers such as "first", "second", and "third" in the present disclosure are provided to avoid confusion of constituent elements, rather than to limit the quantity. The "plurality" in the present disclosure includes two and more than two.

[0047] In the present disclosure, for the sake of convenience, the words and phrases indicating the orientation or positional relationship, such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing the present specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which the constituent elements are described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the situation.

[0048] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0049] In the present disclosure, a transistor refers to an element including at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain) and a source electrode (source electrode terminal, source region, or source), and current can flow through the drain electrode, the channel region, and the source electrode. In the present disclosure, a channel region refers to a region where current mainly flows.

[0050] In the present disclosure, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using transistors with opposite polarities or when the current direction changes during circuit operation, the functions of the "source electrode" and the "drain electrode" are sometimes interchanged. Therefore, in the present disclosure, the "source electrode" and the "drain electrode" may be interchanged.

[0051] In the present disclosure, "electrical connection" includes the situation where components are connected together through an element having some electrical function. There is no particular limitation on the "element having some electrical function" as long as it can transmit and receive electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having one or more functions.

[0052] In the present disclosure, "parallel" means a state where the angle formed by two straight lines is greater than -10° and less than 10°, and therefore, a state where the angle is greater than -5° and less than 5° may be included. In addition, "perpendicular" means a state where the angle formed by two straight lines is greater than 80° and less than 100°, and therefore, a state where the angle is greater than 85° and less than 95° may be included.

[0053] In the present disclosure, "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced with "conductive film" in some cases. Similarly, "insulating film" may be replaced with "insulating layer" in some cases.

[0054] The term "about" in the present disclosure refers to a numerical value that is not strictly limited to allow for process and measurement errors.

[0055] Figure 1 The invention discloses a structure of a cover tape used for a display device. Figure 2 for Figure 1 The cross-sectional view of the cover tape at the AA mark is shown. Figure 1 , Figure 2 As shown, the cover tape 10 includes a first base film 101, mylar adhesive 102, a conductive fabric 103 and a first transfer film 104 which are stacked in sequence. Figure 1As shown, a plurality of first alignment holes 105 are provided on the first transfer film 104 , and the cover tape 10 needs to be installed and aligned with the aid of the plurality of first alignment holes 105 .

[0056] Figure 3 The invention relates to a structure of a pre-fixed film used in a display device. Figure 4 for Figure 3 The schematic cross-sectional view of the pre-fixed membrane at the mark BB is shown. Figure 3 , Figure 4 As shown, the pre-fixed film 20 includes a second base film 201, a protective film 202 and a second transfer film 203 which are stacked in sequence. Figure 3 As shown, a plurality of second alignment holes 204 are provided on the second transfer film 203 , and the pre-fixed film 20 needs to be installed and aligned with the aid of the plurality of second alignment holes 204 .

[0057] In the design of the display device in the related art, the cover tape 10 and the pre-fixed film 20 are designed and manufactured separately, and both need to be designed with alignment holes for installation and alignment. The overall production and installation processes of the product are relatively large, and two alignments are required, resulting in low alignment accuracy.

[0058] The embodiment of the present application provides a cover tape. The cover tape comprises a base film and a protective film which are stacked, and a composite structure layer located between the protective film and the base film; the orthographic projection of the protective film on the plane where the cover tape is located covers the orthographic projection of the composite structure layer; the composite structure layer comprises an antistatic material;

[0059] The cover tape also includes a double-sided adhesive layer arranged between the protective film and the base film, and the protective film and the base film are bonded and connected via the double-sided adhesive layer.

[0060] The cover tape provided in the embodiment of the present application integrates the cover tape structure and the pre-fixed film structure of the related technology, simplifies the overall production process and installation process of the product, does not require two alignments, has higher alignment accuracy and lower production costs.

[0061] The technical solution of the embodiments of the present application is described in detail below through specific examples.

[0062] Figure 5 FIG. 1 is a schematic top view of the cover tape of an embodiment of the present application. Figure 5 As shown, three directions are defined to facilitate the description of the technical solution, and the first direction is marked as X, the second direction is marked as Y, and the third direction is marked as Z (such as Figure 6 As shown in FIG. 1 , the first direction, the second direction and the third direction are all different. In the embodiment of the present application, the first direction, the second direction and the third direction are perpendicular to each other. The third direction is also the thickness direction of the cover tape 30.

[0063] like Figure 5 As shown, the cover tape 30 of the embodiment of the present application includes a base film 301 and a protective film 302 arranged opposite to each other along a third direction. Figure 5 In the embodiment, the protective film 302 is made of a transparent material so as to facilitate display of the components between the protective film 302 and the base film 301. The base film 301 can be used as a carrier for carrying the components of the cover tape 30 other than the base film 301. The base film 301 plays the role of transfer and transportation protection as a carrier, and the present disclosure does not limit the material used for the base film 301.

[0064] like Figure 5 As shown, the cover tape 30 is provided with a first central axis 40 along a first direction and a second central axis 50 along a second direction. The base film 301 can be provided with a symmetrical structure along the first central axis 40 and the second central axis 50 .

[0065] like Figure 5 As shown, in the plane formed by XY, the orthographic projection of the base film 301 can be a rectangle, etc. Figure 5 As shown, in the plane formed by XY, the orthographic projection of the protective film 302 can fall within the orthographic projection of the base film 301. For example, Figure 5 As shown, the orthographic projection of the protection film 302 may fall in the middle of the orthographic projection of the base film 301 .

[0066] like Figure 5 As shown, the protective film 302 includes a first edge 302a and a second edge 302b that are arranged opposite to each other along a first direction. The orthographic projection of the protective film 302 in the plane formed by XY may be H-shaped. The protective film 302 is provided with a notch on at least one of the first edge 302a and the second edge 302b. The notch is configured to cooperate with other components of the display device. In practical applications, the size of the notch along the first direction and the size along the second direction can be adjusted to meet the matching requirements of different components, thereby improving the versatility of the cover tape 30 and reducing the cost of the cover tape 30.

[0067] like Figure 5 As shown, the notch provided on the first edge 302a of the protective film 302 is a first notch 303, and the notch provided on the second edge 302b of the protective film 302 is a second notch 304. In the embodiment of the present application, the protective film 302 is provided with the first notch 303 and the second notch 304 as an example. Figure 5As shown, the first notch 303 and the second notch 304 can be set to a symmetrical structure along the second central axis 50. The shapes and sizes of the first notch 303 and the second notch 304 can be designed to be the same or different. In practical applications, the spacing between the first notch 303 and the second notch 304 along the first direction and the size of the first notch 303 along the second direction can be adjusted to meet the matching requirements of different components.

[0068] In an exemplary embodiment, if Figure 5 As shown, the cover tape 30 may further include a tearing portion 305, which is fixed to the edge of the protective film 302 and partially exceeds the edge of the protective film 302. The tearing portion 305 is provided so that the operator can tear off the protective film 302 in the subsequent assembly operation. The edge area of ​​the base film 301 not covered by the protective film 302 can also be used as the tearing portion of the base film 301.

[0069] like Figure 5 As shown, the hand-tear portion 305 may be disposed in the region between the first edge 302a and the second edge 302b. The protective film 302 may further include a third edge 302c, one end of the third edge 302c is connected to the first edge 302a, and the other end of the third edge 302c is connected to the second edge 302b.

[0070] The hand-tearable portion 305 may be disposed on the third edge 302c, and extend along the second direction in a direction away from the protective film 302. In the plane formed by XY, the orthographic projection of the hand-tearable portion 305 may be a square or a rectangle.

[0071] In an exemplary embodiment, the size of the hand-tear portion 305 along the first direction is smaller than the size of the third edge 302c along the first direction. The present disclosure does not limit the specific sizes of the hand-tear portion 305 and the third edge 302c.

[0072] In an exemplary embodiment, the hand-tear portion 305 may be located in the middle of the third edge 302c. In the present disclosure, the middle is not the midpoint of the third edge 302c, and the area other than the two end points of the third edge 302c may be collectively referred to as the middle.

[0073] In an exemplary embodiment, the protective film 302 and the hand-tear portion 305 may be designed as an integrally formed structure, which can avoid assembly operations, reduce production processes, and reduce the overall cost of the product.

[0074] In an exemplary embodiment, the protective film 302 may be a transparent film, for example, the material of the protective film 302 may be a transparent silicone film or a transparent silicone PET film (PET, Polyethylene terephthalate) or the like.

[0075] In an exemplary embodiment, a glue layer may be provided on one side of the protective film 302 close to the base film 301. The glue layer may be a single-sided adhesive or a double-sided adhesive.

[0076] In an exemplary embodiment, the cover tape 30 may further include a double-sided adhesive layer disposed between the base film 301 and the protective film 302. The base film 301 and the protective film 302 are bonded together via the double-sided adhesive layer. The double-sided adhesive layer may include more than one adhesive strip. In the embodiment of the present application, more than one means one or more. Figure 5 As shown, the double-sided adhesive layer may include a first adhesive strip 306 and a second adhesive strip 307. The first adhesive strip 306 and the second adhesive strip 307 may be spaced apart along the second direction.

[0077] In an exemplary embodiment, the bonding strengths on both sides of the double-sided adhesive layer are different, and the peeling force between the double-sided adhesive layer and the protective film 302 is greater than the peeling force between the double-sided adhesive layer and the bottom film 301. The greater the peeling force, the stronger the bonding. The bonding strength between the double-sided adhesive layer and one side of the protective film 302 is greater than the bonding strength between the double-sided adhesive layer and one side of the bottom film 301. In the process of assembling the display device, the protective film 302 needs to be torn off from the hand-tear portion 305. Since the peeling force between the double-sided adhesive layer and the protective film 302 is large, the double-sided adhesive layer is torn off together with the protective film 302 to prevent the double-sided adhesive layer from affecting the electrostatic protection performance of the display device.

[0078] In an exemplary embodiment, if Figure 5 As shown, the first adhesive strip 306 and the second adhesive strip 307 can both be configured as long strips and extend along the first direction. The first adhesive strip 306 and the second adhesive strip 307 can be configured as the same adhesive strip, which can reduce the types of components contained in the cover tape 30 and reduce production costs.

[0079] like Figure 5 As shown, the first adhesive strip 306 and the second adhesive strip 307 can be disposed on both sides of the notch, so that the cover tape 30 can be firmly bonded to the fixing component during the process of assembling and integrating the cover tape 30 into the display device. For example, the fixing component can be a TCON-PCB board.

[0080] In an exemplary embodiment, if Figure 5 As shown, the orthographic projection of the hand-tear portion 305 on the plane where the cover tape 30 is located does not overlap with the orthographic projection of the double-sided adhesive layer on the plane where the cover tape 30 is located. This arrangement can improve the convenience of using the hand-tear portion 305 and obtain a better tearing operation feel. In the embodiment of the present application, the plane where the cover tape 30 is located is parallel to the plane formed by XY.

[0081] In an exemplary embodiment, if Figure 5As shown, the cover tape 30 further includes an alignment mark 308. The alignment mark 308 may be located between the protective film 302 and the base film 301. The alignment mark 308 may be bonded between the protective film 302 and the base film 301. The alignment mark 308 may be located between the first adhesive strip 306 and the second adhesive strip 307, and may be disposed in the same layer as the double-sided adhesive layer.

[0082] like Figure 5 As shown, the alignment mark 308 can be set to be a long strip. The orthographic projection of the alignment mark 308 in the plane formed by XY can be a long strip. The orthographic projection of the alignment mark 308 in the plane formed by XY can be located between the orthographic projection of the first adhesive strip 306 and the notch. Figure 5 As shown, the alignment marks 308 can be disposed closely to the first adhesive strip 306 and both extend along the first direction.

[0083] In an exemplary embodiment, if Figure 5 As shown, the alignment mark 308 can be set as a black film layer, and can be set in the same layer as the double-sided adhesive layer. The protective film 302 can be set as a transparent film. With this design, the color of the alignment mark 308 can be used for alignment. The black color is easy for human eyes to distinguish, which is convenient for rapid alignment.

[0084] In an exemplary embodiment, the material of the alignment mark 308 can be hard silicone or hard foam, etc. The present disclosure does not limit the specific material, as long as it can play the role of alignment. Black hard silicone or black hard foam can be used for alignment and is easy to take manually. There is no need to set a mark at the corresponding position of the fixed component separately, and no additional transfer film design is required, which simplifies the overall product design and reduces manufacturing costs.

[0085] In an exemplary embodiment, the cover tape 30 further includes a composite structure layer stacked between the protective film 302 and the base film 301. The composite structure layer includes an antistatic material. The orthographic projection of the protective film 302 on the plane where the cover tape 30 is located covers the orthographic projection of the composite structure layer.

[0086] In an exemplary embodiment, if Figure 5 As shown, the composite structure layer may include a conductive cloth layer 309 and a mylar glue layer 310 stacked between the protective film 302 and the base film 301. The conductive cloth layer 309 is close to one side of the protective film 302, and the mylar glue layer 310 is close to one side of the base film 301. In the plane formed by XY, the orthographic projection of the conductive cloth layer 309 and the orthographic projection of the mylar glue layer 310 may overlap at least partially. For example, in the plane formed by XY, the orthographic projections of the conductive cloth layer 309 and the mylar glue layer 310 may overlap.

[0087] In the plane formed by XY, the orthographic projection of the protective film 302 can cover the orthographic projection of the conductive cloth layer 309 and the Mylar glue layer 310 to protect the conductive cloth layer 309 and the Mylar glue layer 310 and avoid damage to the conductive cloth layer 309 and the Mylar glue layer 310 during transportation and the like.

[0088] In an exemplary embodiment, if Figure 5 As shown, the conductive fabric layer 309 and the mylar adhesive layer 310 may together constitute at least part of the composite structure layer. The composite structure layer may be disposed in the same layer as the double-sided adhesive layer. The conductive fabric layer 309 and the mylar adhesive layer 310 may be disposed between the first adhesive strip 306 and the second adhesive strip 307.

[0089] In an exemplary embodiment, if Figure 5 As shown, the orthographic projection of the conductive fabric layer 309 in the plane formed by XY can be a rectangle, etc. The orthographic projection of the mylar glue layer 310 in the plane formed by XY can be a rectangle, etc.

[0090] Figure 6 for Figure 5 The cross-sectional view of the cover tape at the mark C is shown. Figure 6 As shown, the protective film 302 and the bottom film 301 are stacked along the third direction. The double-sided adhesive layer, the alignment mark 308 , the conductive fabric layer 309 and the mylar adhesive layer 310 are all arranged between the protective film 302 and the bottom film 301 .

[0091] like Figure 6 As shown, along the third direction, that is, the thickness direction of the cover tape 30, the side of the composite structure layer close to the base film 301 does not exceed the side of the double-sided adhesive layer close to the base film 301. In the structure where the composite structure layer only includes the mylar adhesive layer 310 and the conductive cloth layer 309, the side of the mylar adhesive layer 310 close to the base film 301 does not exceed the side of the double-sided adhesive layer close to the base film 301. For example, the side of the mylar adhesive layer 310 close to the base film 301 is flush with the side of the double-sided adhesive layer close to the base film 301. Alternatively, the side of the mylar adhesive layer 310 close to the base film 301 is lower than the side of the double-sided adhesive layer close to the base film 301.

[0092] Such a configuration can avoid the problem of stress concentration at the contact position with the fixed component caused by the different thicknesses of the film layers of the cover tape 30, and can improve the reliability of the display device. Compared with the two alignments of the cover tape and the pre-fixed film in the traditional module process, the cover tape 30 provided in the embodiment of the present application can be obtained by the overall cutting of the knife die in the die-cutting process, and the relative position accuracy between the conductive cloth layer 309, the mylar glue layer 310 and the protective film 302 is higher, and the overall cutting process cost is lower.

[0093] The cover tape 30 provided in the embodiment of the present application optimizes the module process flow, and the original two-attachment process is simplified to a single attachment process, saving costs. The cover tape and pre-fixing film of the related art are simplified to the same composite film, saving redundant transfer film and base film, and having good ESD protection and pre-fixing functions.

[0094] The present application also provides a method for using a cover tape, which is applied to the cover tape described in any of the above embodiments. Take the application of the cover tape 30 to the circuit board 60 as an example. The circuit board 60 is an embodiment of the aforementioned fixing component. For example, the circuit board 60 can be a PCB (Printed Circuit Board). The method includes:

[0095] At the process end of the display device, the circuit board 60 is arranged on one side of the support 70. First, the bottom film 301 of the cover tape 30 is torn off, and the first adhesive strip 306 and the second adhesive strip 307 are attached to the support 70 by using the alignment mark 308, so that the part of the cover tape 30 is fully attached to the circuit board 60. The attachment effect is as follows: Figure 7 As shown. Figure 7 In the structure shown, the base film 301 of the cover tape 30 has been torn off, and this embodiment of the present application will not be identified by a separate number.

[0096] After the display device is transported to the customer's host assembly end, the protective film 302 is torn off from the hand-tear portion 305, and the first adhesive strip 306 and the second adhesive strip 307 are torn off together with the protective film 302, and the conductive cloth layer 309 and the Mylar adhesive layer 310 are retained on the circuit board 60.

[0097] By matching the peeling force, the alignment mark 308 can be retained on the circuit board 60 to be used as a potential alignment mark for other structures. Alternatively, the alignment mark 308 can be torn off along with the protective film 302. Figure 8 shown.

[0098] The present application also provides a method for using the cover tape, the method comprising:

[0099] The base film is peeled off, and the cover tape except the base film is bonded to a fixed component;

[0100] The protective film and the double-sided adhesive layer are torn off, and the composite structure layer is retained on the fixing component.

[0101] The embodiment of the present application also provides a display device, which uses the cover tape described in any of the above embodiments. The display device may include a circuit board and the cover tape described in any of the above embodiments. The cover tape can be bonded to the circuit board after the base film is torn off.

[0102] The display device may be a vehicle-mounted display device, etc. The display device may be: a display panel, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0103] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A cover tape, characterized in that: It comprises a stacked base film and a protective film, and a composite structure layer located between the protective film and the base film; the orthographic projection of the protective film on the plane where the cover tape is located covers the orthographic projection of the composite structure layer; the composite structure layer comprises an antistatic material; The cover tape further includes a double-sided adhesive layer disposed between the protective film and the base film, and the protective film and the base film are bonded and connected via the double-sided adhesive layer; along the thickness direction of the cover tape, the side of the composite structure layer close to the base film does not exceed the side of the double-sided adhesive layer close to the base film, and the orthographic projection of the double-sided adhesive layer on the plane where the cover tape is located does not overlap with the orthographic projection of the composite structure layer on the plane where the cover tape is located; The bonding strength between the double-sided adhesive layer and one side of the protective film is greater than the bonding strength between the double-sided adhesive layer and one side of the base film, so that the double-sided adhesive layer can be torn off together with the protective film to prevent the double-sided adhesive layer from affecting the electrostatic protection performance.

2. The cover tape according to claim 1, characterized in that: The protective film comprises a first edge and a second edge arranged opposite to each other along a first direction; The protection film is provided with a notch at at least one of the first edge and the second edge.

3. The cover tape according to claim 2, characterized in that: The notch provided on the first edge of the protective film is recorded as a first notch, and the notch provided on the second edge of the protective film is recorded as a second notch. The first notch and the second notch are arranged opposite to each other.

4. The cover tape according to claim 2, characterized in that: The double-sided adhesive layer comprises a first adhesive strip and a second adhesive strip arranged at intervals along the second direction; The orthographic projections of the first adhesive strip and the second adhesive strip on the plane where the cover adhesive tape is located are arranged on both sides of the orthographic projection of the notch on the plane where the cover adhesive tape is located; The first direction and the second direction intersect, and the plane formed by them is parallel to the plane where the cover tape is located.

5. The cover tape according to any one of claims 1 to 4, characterized in that: The composite structure layer includes a conductive cloth layer and a Mylar glue layer; the conductive cloth layer is closer to the protective film than the Mylar glue layer; the orthographic projection of the conductive cloth layer on the plane where the cover tape is located at least partially overlaps with the orthographic projection of the Mylar glue layer on the plane where the cover tape is located.

6. The cover tape according to any one of claims 1 to 4, characterized in that: The cover tape further includes an alignment mark; the alignment mark is arranged between the base film and the protective film; The protective film is a transparent film; the alignment mark is a black film layer and is arranged on the same layer as the double-sided adhesive layer.

7. The cover tape according to any one of claims 2 to 4, characterized in that: The cover tape further comprises a hand-tear portion; the hand-tear portion is connected to the protective film and extends in a direction away from the protective film; The orthographic projection of the hand-tear portion on the plane where the cover tape is located does not overlap with the orthographic projection of the double-sided adhesive layer on the plane where the cover tape is located.

8. The cover tape according to claim 7, characterized in that: The protective film further includes a third edge connecting the first edge and the second edge; the hand-tear portion is connected to the third edge.

9. A method for using a cover tape, characterized in that: Applicable to the cover tape according to any one of claims 1 to 8; the method of use comprises: The base film is peeled off, and the cover tape except the base film is bonded to a fixed component; The protective film and the double-sided adhesive layer are peeled off, so that the composite structure layer is retained on the fixing component.

10. The method for using the cover tape according to claim 9, characterized in that: In the structure where the cover tape is provided with an alignment mark, the alignment mark is retained on the fixing component; or the alignment mark is torn off together with the protective film.

11. A display device, characterized in that: It comprises a circuit board and the cover tape as claimed in any one of claims 1 to 8; The cover tape is adhered to the circuit board after the base film is torn off.

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