CONDUCTIVE FOAM TAPE AND DISPLAY PANEL

A conductive foam tape and a display panel are provided. The conductive foam tape includes a conductive foam and a conductive cloth layer disposed on an outside of the conductive foam. The conductive cloth layer has an extension portion protruding out of the conductive foam at least one end of the conductive foam tape.

The present application claims the priority of the Chinese Patent Application No. 201721239203.1 filed on Sep. 25, 2017, which is incorporated herein by reference as part of the disclosure of the present application.

TECHNICAL FIELD

The embodiments of the present disclosure relate to a conductive foam tape and a display panel.

BACKGROUND

Conductive foam tapes are widely used in a display panel. For example, the conductive foam tapes are used for electrically connecting electrical components in the display panel. For example, the conductive foam tapes are used for electrically connecting the display panel to external circuits. For example, the conductive foam tapes are used as antistatic components to conduct electrostatic charges accumulated on the display panel to outside of the display panel.

SUMMARY

According to embodiments of the disclosure, a conductive foam tape is provided. The conductive foam tape comprises: a conductive foam and a conductive cloth layer disposed on an outside of the conductive foam. The conductive cloth layer has an extension portion protruding out of the conductive foam at at least one end of the conductive foam tape.

For example, the conductive cloth layer is wrapped around the conductive foam.

For example, a surface, facing away from the conductive foam, of at least a portion of the conductive cloth layer wrapped around the conductive foam has a first adhesive layer.

For example, the conductive foam is a cuboid and has a top surface, a bottom surface and two side surfaces, and the top surface, the bottom surface and the two side surfaces are all parallel to a length direction of the conductive foam tape; and a portion, disposed on at least one of the top surface, the bottom surface and the two side surfaces of the conductive foam, of the conductive cloth layer has the extension portion.

For example, at a same end of the conductive foam tape, a portion, disposed on at least one of the top surface, the bottom surface and the two side surfaces of the conductive foam, of the conductive cloth layer does not have the extension portion protruding out of the conductive foam.

For example, at a same end of the conductive foam tape, each of portions, respectively disposed on each of the top surface, the bottom surface and the two side surfaces of the conductive foam, of the conductive cloth layer has the extension portion protruding out of the conductive foam, but the extension portions have different lengths.

For example, a portion, disposed on the top surface of the conductive foam, of the conductive cloth layer has the extension portion.

For example, a portion, disposed on at least one of the two side surfaces of the conductive foam, of the conductive cloth layer has the extension portion.

For example, a surface, facing away from the conductive foam, of a portion, disposed on the bottom surface of the conductive foam, of the conductive cloth layer has a first adhesive layer.

For example, only one side of the conductive foam is provided with the conductive cloth layer.

For example, a thickness of the conductive cloth layer is less than or equal to a thickness of the conductive foam.

For example, a surface, facing away from the conductive cloth layer, of the conductive foam has a second adhesive layer.

For example, a thickness of the extension portion is from 0.1 mm to 0.2 mm.

For example, a length of the extension portion is from 5 mm to 10 mm.

For example, the extension portion is provided with a third adhesive layer.

For example, along a length direction of the conductive foam tape, the conductive cloth layer has the extension portion protruding out of the conductive foam respectively at two opposite ends of the conductive foam tape.

According to the embodiments of the disclosure, a display panel is provided. The display panel comprises: a frame and the conductive foam tape as described above. A plurality of conductive foam tapes are disposed on the frame, and the conductive foam tapes adjacent to each other are electrically connected with each other by the extension portions of the conductive foam tapes adjacent to each other.

For example, a space is between an edge of the frame and the conductive foam tape.

For example, orthographic projections of the conductive foams of the plurality of the conductive foam tapes on a plane where the frame is located do not overlap with each other.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of embodiments of the disclosure clear, the technical solutions of the embodiments will be described in a clearly and fully understandable way in connection with the related drawings. It is apparent that the described embodiments are just a part but not all of the embodiments of the disclosure. Based on the described embodiments herein, those skilled in the art can obtain, without any inventive work, other embodiment(s) which should be within the scope of the disclosure.

FIG. 1is a schematic diagram of a display panel according to one technique. The display panel includes a front frame1′ and conductive foam tapes2′ disposed on a surface of the front frame1′. For example, the front frame1′ is a rectangle, and four sides of the front frame1′ are respectively provided with the long strip-shaped conductive foam tapes2′. Each of the conductive foam tapes2′ has a certain thickness, and thus ends of the conductive foam tapes2′ adjacent to each other cannot be directly overlapped with each other for electrical connecting, otherwise thicknesses at overlapping positions are increased significantly, which results in light leakage of the display panel. Because a conductive cloth is very thin, a thickness of a partial region, in which the conductive cloth is provided, of the display panel is not increased significantly, which thus does not lead to the light leakage of the display panel. Therefore, the conductive cloth3′ is attached to ends of adjacent conductive foam tapes2′ to electrically connect the adjacent conductive foam tapes2′. However, the electrical connection method employing the conductive cloth increases process complexity of assembling the display panel, and wastes human resources.

According to at least one embodiment of the present disclosure, a conductive foam tape is provided.FIG. 7Ais a sectional schematic diagram of the conductive foam tape provided by at least one embodiment of the present disclosure, andFIG. 7Bis a planar schematic diagram of the conductive foam tape shown inFIG. 7Aviewed from a side provided with a conductive cloth layer. As illustrated inFIG. 7AandFIG. 7B, the conductive foam tape includes a conductive foam4and a conductive cloth layer5disposed on an outside of the conductive foam4, and the conductive cloth layer5has an extension portion6protruding out of the conductive foam4at at least one end of the conductive foam tape. For example, the extension portion6acts as a connection portion of the conductive foam tape. In a process of assembling the display panel, the conductive foam tapes adjacent to each other are electrically connected with each other by the extension portions6thereof. For example, the extension portions6of the conductive foam tapes adjacent to each other are stacked to electrically connect the conductive foam tapes adjacent to each other. For example, for two conductive foam tapes adjacent to each other, the extension portion6of one of the two conductive foam tapes is attached or bonded to the conductive cloth layer5or the conductive foam4of the other of the two conductive foam tapes to electrically connect the conductive foam tapes adjacent to each other. In a case that the conductive foam tape according to at least one embodiment of the present disclosure is used to assemble the display panel, the light leakage does not occur, and it is also possible to electrically connect the conductive foam tapes adjacent to each other in a simple manner, which saves human resources and related costs, and a production efficiency is increased. For example, as illustrated inFIG. 7AandFIG. 7B, only one side of the conductive foam4is provided with the conductive cloth layer5.

For example, at at least one end of the conductive foam tape along a length direction of the conductive foam tape, the conductive cloth layer5has the extension portion6protruding out of the conductive foam4. For example, as illustrated inFIG. 7AandFIG. 7B, at two opposite ends of the conductive foam tape, the conductive cloth layer5has the extension portion6protruding out of the conductive foam4.

For example, as illustrated inFIG. 7AandFIG. 7B, a thickness t2of the conductive cloth layer5is less than a thickness t1of the conductive foam4, which prevents light leakage after assembling the display panel.

For example, as illustrated inFIG. 7AandFIG. 7B, the thickness t2of the conductive cloth layer5is equal to the thickness t1of the conductive foam4. In a case that the thickness t2of the conductive cloth layer5is equal to the thickness t1of the conductive foam4and the extension portions6of the conductive foam tapes adjacent to each other are stacked, a sum of the thicknesses of the extension portions6of the conductive foam tapes adjacent to each other at stacking positions is the same as a thickness of a portion of each of the conductive foam tapes other than the extension portions6, and a good thickness uniformity is achieved.

For example, as illustrated inFIG. 8, a surface of the extension portion6towards the conductive foam4is provided with a third adhesive layer73, so that the extension portion6is able to be firmly fixed to another conductive foam tape or other components.

For example, as illustrated inFIG. 8, an entire surface of the conductive cloth layer5towards the conductive foam4is provided with the third adhesive layer73. On one hand, the conductive cloth layer5is firmly fixed to the conductive foam4. On the other hand, the extension portion6of the conductive cloth layer5is firmly fixed to another conductive foam tape or other components. For example, the third adhesive layer73is conductive.

For example, as illustrated inFIG. 8, a surface of the conductive foam4facing away from the conductive cloth layer5is provided with a second adhesive layer72, so that the conductive foam tape is firmly fixed on other components such as the display panel. For example, the second adhesive layer72is also conductive.

FIG. 2is another sectional schematic diagram of the conductive foam tape provided by at least one embodiment of the present disclosure,FIG. 3is a sectional schematic diagram of the conductive foam tape shown inFIG. 2taken along another direction, andFIG. 4is a stereoscopic diagram of the conductive foam of the conductive foam tape shown inFIG. 2. The sectional diagram illustrated inFIG. 2is taken in a direction parallel to the length direction of the conductive foam tape, and the sectional diagram illustrated inFIG. 3is taken in a direction perpendicular to the length direction of the conductive foam tape.

For example, as illustrated inFIG. 2,FIG. 3andFIG. 4, the conductive foam tape includes the conductive foam4and the conductive cloth layer5disposed on the outside of the conductive foam4. The conductive foam4has a flexibility and a light weight, and the conductive foam4acts as a base of conductive cloth layer5. The conductive cloth layer5is conductive, and the conductive cloth layer5is fixed on an outer surface of the conductive foam4.

For example, the conductive cloth layer5is wrapped around the conductive foam4. In this case, for example, the conductive cloth layer5is wrapped on all surfaces of the conductive foam4parallel to the length direction of the conductive foam tape, and only a surface of the conductive foam4perpendicular to the length direction of the conductive foam tape is not provided with the conductive cloth layer5.

For example, the conductive cloth layer5is wrapped around the conductive foam4. In this case, in order to facilitate attaching the conductive foam tape to other components such as the display panel, as illustrated inFIG. 2, a surface, facing away from the conductive foam4, of at least a portion of the conductive cloth layer5wrapped around the conductive foam4has a first adhesive layer71. For example, the first adhesive layer71is conductive.

As illustrated inFIG. 2toFIG. 4, for example, the conductive foam4is a cuboid, the conductive cloth layer5is wrapped around the conductive foam4; that is, the conductive cloth layer5is fixed on a top surface401, a bottom surface402and two side surfaces403of the conductive foam4, and all of the top surface401, the bottom surface402and the two side surfaces403of the conductive foam4are parallel to the length direction of the conductive foam tape. For example, a surface402, facing away from the conductive foam4, of a portion, disposed on the bottom surface402of the conductive foam4, of the conductive cloth layer5has the first adhesive layer71, and the first adhesive layer71is used for attaching the conductive foam tape onto other components such as the display panel. For example, a portion, disposed on at least one of the top surface401, the bottom surface402and the two side surfaces403of the conductive foam4, of the conductive cloth layer5has the extension portion6. Furthermore, for example, at a same end of the conductive foam tape, a portion, disposed on at least one of the top surface401, the bottom surface402and the two side surfaces403of the conductive foam4, of the conductive cloth layer5does not have the extension portion6protruding out of the conductive foam, so as to prevent the portion, on each surface of the conductive foam4, of the conductive cloth layer5has the extension portions6at the same end of the conductive foam tape, which avoids the increasing of the difficulty of connecting the conductive foam tape to other components. For example, in order to reduce the difficulty of connecting the conductive foam tape to other components, at the same end of the conductive foam tape, each of portions, respectively disposed on each of the top surface401, the bottom surface402and the two side surfaces403of the conductive foam4, of the conductive cloth layer5has the extension portion6protruding out of the conductive foam4, but the extension portions6have different lengths. It should be noted that “the extension portions6have different lengths” means that at the same end of the conductive foam tape, the length of the extension portion6of the portion, disposed on at least one of the top surface401, the bottom surface402and the two side surfaces403of the conductive foam4, of the conductive cloth layer5is different from the lengths of the extension portions6of other portions of the conductive cloth layer5.

For example, as illustrated inFIG. 2, at only one end of the conductive foam tape, the conductive cloth layer5has the extension portions6protruding out of the conductive foam4. For example, as illustrated inFIG. 5, along the length direction of the conductive foam tape, the conductive cloth layer5has the extension portion6protruding out of the conductive foam4at two opposite ends of the conductive foam tape. The extension portion6act as the connection portion of the conductive foam tape. In a case of assembling the display panel, the conductive foam tapes adjacent to each other are electrically connected with each other by the extension portions6thereof. In a case that the conductive foam tape according to at least one embodiment of the present disclosure is used to assemble the display panel, the light leakage does not occur, and it is also possible to electrically connect the conductive foam tapes adjacent to each other in a simple manner, which saves human resources and related costs, and the production efficiency is increased.

The portion, disposed on at least one surface of the conductive foam4, of the conductive cloth layers5is provided with the extension portion6. The surface of conductive foam4includes the top surface401, the bottom surface402and the two side surfaces403, and the top surface401, the bottom surface402and the two side surfaces403are all parallel to the length direction of the conductive foam tape. For example, as illustrated inFIG. 2, the portion, disposed on the top surface401of the conductive foam4, of the conductive cloth layer5has the extension portion6. In a case of assembling the display panel, the extension portion6on the top surface of the conductive foam4is directly attached or bonded to the conductive cloth layer5on the top surface of the other conductive foam tape adjacent thereto, to achieve that two conductive foam tapes2are connected with each other. For example, the portion, disposed on at least one of the two side surfaces403of the conductive foam4, of the conductive cloth layers5has the extension portion6. In a case of assembling the display panel, the extension portion6on at least one of the two side surfaces403of the conductive foam4is attached to the conductive cloth layer5on at least one of the two side surfaces403of the other conductive foam tape adjacent thereto, to achieve that two conductive foam tapes2are connected with each other. For example, the portion, disposed on the bottom surface401of the conductive foam4, of the conductive cloth layer5has the extension portion6. In a case of assembling the display panel, the extension portion6on the bottom surface of the conductive foam4is disposed below the conductive cloth layer5on the bottom surface of the other conductive foam tape adjacent thereto, to achieve that two conductive foam tapes2are connected with each other. According to the embodiments of the present disclosure, the connection modes of the adjacent conductive foam tapes is simple, and the assembly efficiency of the display panel is increased.

For example, a thickness of the extension portion6is from 0.1 mm to 0.2 mm, which prevents the light leakage after assembling the display panel. For example, a length of the extension portion6is from 5 mm to 10 mm. For example, as illustrated inFIG. 8, the extension portion6has the third adhesive layer73for bonding to other conductive components, which makes the extension portion6more tightly connected with other conductive components.

As illustrated inFIG. 2toFIG. 4, the conductive cloth layer5is wrapped around the conductive foam4; in a case of assembling the display panel, the extension portion6of the conductive foam tape is directly attached or bonded to any positions of an outer surface of the other conductive foam tape adjacent thereto, to achieve that two conductive foam tapes adjacent to each other are connected with each other. Therefore, the operation is simple and the efficiency of assembling the display panel is increased.

As illustrated inFIG. 6, at least one embodiment of the present disclosure further provides a display panel, and the display panel includes a frame1and a conductive foam tape2attached on the frame1, and the conductive foam tape2is any one of the conductive foam tapes mentioned above. For example, the display panel includes a plurality of conductive foam tapes2, and the plurality of conductive foam tapes2are respectively electrically connected with the conductive foam tapes2adjacent thereto by the extension portions6. For example, the frame1is a front frame. For example, the frame1is a rectangular frame; the display panel includes four conductive foam tapes2, and the four conductive foam tapes2are respectively provided on upper surfaces of four sides of the frame1. The four conductive foam tapes2are respectively electrically connected with the adjacent conductive foam tapes2adjacent thereto by the extension portions6, so that the four conductive foam tapes respectively provided on the four sides are joined together in an end-to-end manner to form an integral structure. Therefore, the operation is simple and the assembly efficiency of the display panel is increased.

In at least one embodiment of the present disclosure, orthographic projections of the conductive foams4of the plurality of the conductive foam tapes2on a plane where the frame1is located do not overlap with each other, that is, the conductive foams4of adjacent conductive foam tapes2do not overlap with each other. For example, a space is between the conductive foam tape2and an edge of the frame1, so that the conductive foam tape2is not in contact with the edge of the frame1, which prevents the conductive cloth layer5of the conductive foam tape2from being affected by the edge of the frame1to affect electrical conductivity of the conductive cloth layer5.

What are described above is related to only the illustrative embodiments of the present disclosure and not limitative to the scope of protection of the present disclosure. The scope of protection of the present disclosure shall be defined by the accompanying claims.