CN210573698U

CN210573698U - Electronic equipment with touch screen

Info

Publication number: CN210573698U
Application number: CN201920896505.9U
Authority: CN
Inventors: 陈仕超; 林汉良
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-05-19
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses an electronic device with a touch screen, which comprises a touch screen and a PCB mainboard, wherein the touch screen is provided with a plurality of contact electrodes in a frame area; the electronic equipment is also provided with a plurality of electric contacts which are electrically connected with a mainboard of the electronic equipment; and a conductive adhesive tape is arranged between the contact electrode and the electric contact part, and the contact electrode of the touch screen is electrically connected with the electric contact part through the conductive adhesive tape. The utility model discloses, set up contact electrode into a plurality ofly, adopt conducting strip to carry out the electricity with sensor layer and PCB mainboard and be connected. On one hand, the structural space occupied by the FPC in the traditional design is reduced; on the other hand, under the condition that the shape of the frame area is symmetrical relative to the shape of the touch area, the boundary area can be narrower, the appearance design of a narrow frame or a full screen is facilitated, and the development requirements of circular touch screen electronic products such as pure circles, narrow frames and the like are particularly favorably met.

Description

Electronic equipment with touch screen

Technical Field

The utility model relates to a touch-control technical field especially relates to an electronic equipment with touch-sensitive screen.

Background

In a conventional touch screen design, such as a smart watch with a circular screen, as shown in fig. 1, the touch screen includes a touch area 100b and a frame area 100a, and a region is required between the touch electrode 12 of the touch layer and the flexible printed circuit FPC50 to bind the electrode pin of the touch layer and the FPC50, and this region is generally referred to as a binding region 112. The FPC50 is typically in turn electrically connected to the PCB motherboard.

The binding area 112 is concentrated on one side of the bezel area 100 a. After being led out from the touch electrode 12, the signal transmission lines respectively pass through the wiring area 111 and reach the binding area 112. The routing area 111 is located around the frame area 100 a. Since the length of the bound region 112 requires a considerable range of dimensions, in existing electronic devices, the touch screen needs to be shielded from the corresponding position of the bound region 112. So that the electronic product has to sacrifice the beauty of the design.

In some embodiments, as shown in fig. 2, the binding area 112 is located close to the touch area 100b, and is forced to cut the touch area 100b (visible area) of the circular screen, so that the touch area 100b is no longer in a complete circle shape, and the aesthetic appearance is affected.

In some embodiments, as shown in fig. 3: the binding area 112 is disposed outside the frame area 100a of the cover plate, and the shape of the frame area and the shape of the touch area are asymmetric, resulting in a special appearance in the border area of the cover plate.

In other embodiments, the binding area 112 is disposed in the bezel area 100a, but in order to ensure the overall appearance of the cover plate, the size of the bezel area 100a of the cover plate has to be increased, which makes the smart watch unable to have a narrow bezel design.

More than, the touch-sensitive screen all carries out the electricity through FPC and PCB mainboard and is connected, and this kind of connected mode is because bind the position and all concentrate on same one side, and shared structure space also strengthens relatively, is unfavorable for circular wrist-watch to do the development demands of circular wrist-watch structures such as pure circular and narrow frame at appearance design.

In other embodiments, for example, a mobile phone, a screen of the mobile phone is generally rectangular, and there is a corresponding problem that the design of a narrow frame or a full screen cannot be achieved due to the limitation of the binding region.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's above-mentioned problem, provide an electronic equipment with touch-sensitive screen.

In order to realize the purpose, the utility model discloses a technical scheme is: the electronic equipment with the touch screen comprises the touch screen and a PCB main board, wherein the touch screen comprises a visible area and a frame area surrounding the visible area, and the touch screen is provided with a plurality of contact electrodes in the frame area; the electronic equipment is also provided with a plurality of electric contacts which are electrically connected with a PCB mainboard of the electronic equipment; and a conductive adhesive tape is arranged between the contact electrode and the electric contact part, and the contact electrode of the touch screen is electrically connected with the electric contact part through the conductive adhesive tape.

Preferably, the plurality of contact electrodes are dispersedly disposed in the bezel region.

Preferably, a grounding electrode is arranged between two adjacent contact electrodes on the touch screen, and the grounding electrode is electrically connected with the PCB mainboard through a conductive adhesive tape.

Preferably, the visible area of the electronic device is circular.

Preferably, an electric contact part is arranged on one surface of the PCB main board facing the touch screen at a position corresponding to the contact electrode;

preferably, the touch screen is a film touch screen, the film touch screen includes a cover plate and a film sensor, the film sensor includes a film substrate and an electrode pattern layer, and the contact electrode is electrically connected to the electrode pattern layer.

Preferably, the edge of the cover plate is provided with a step part; the electronic equipment further comprises a shell, wherein a buckling position is arranged on the shell, and the shell is buckled on the cover plate.

Preferably, the conductive adhesive tape is a zebra stripe formed by an insulating adhesive sheet and a conductive adhesive sheet at intervals.

Preferably, the shape of the conductive adhesive tape is annular and is matched with that of the frame area; and the annular inner side and the annular outer side of the conductive rubber strip are respectively provided with an insulating layer.

Compared with the prior art, the utility model relates to an electronic equipment with touch-sensitive screen has following advantage:

in the traditional electric connection structure of the touch screen and the PCB mainboard, binding pins of touch electrodes are concentrated at one position and then are firstly bound with the FPC, and then are connected with the PCB mainboard through the FPC; and the structure of this application will bind pin-contact electrode and set up to a plurality ofly, has cancelled FPC to adopt conducting strip to carry out the electricity with the sensor layer and PCB mainboard and connect instead. On one hand, the structural space occupied by the FPC in the traditional design is reduced; on the other hand, under the condition that the shape of the frame area is symmetrical relative to the shape of the touch area, the boundary area can be narrower, the appearance design of a narrow frame or a full screen is facilitated, and the development requirements of circular touch screen electronic products such as pure circles and narrow frames are particularly facilitated to be met.

Drawings

FIG. 1 is a schematic structural diagram of a first conventional touch screen;

FIG. 2 is a schematic external view of a second conventional touch screen;

FIG. 3 is a schematic external view of a conventional third touch screen;

fig. 4 is a schematic structural diagram of a touch screen according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a PCB motherboard according to an embodiment of the present invention;

3 FIG. 3 6 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 at 3 A 3- 3 A 3 of 3 FIG. 3 4 3; 3

Fig. 7 is a cross-sectional view of another electronic device according to an embodiment of the invention;

fig. 8 is a schematic view of an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at B;

fig. 10 is an electrical connection schematic diagram of a touch screen and a PCB motherboard of an electronic device according to an embodiment of the present invention.

Reference numerals:

100-touch screen, 100 a-frame area, 100 b-touch area, 10-cover plate, 11-ink layer, 12-touch electrode, 111-wiring area, 112-binding area, 14-contact electrode, 15-PCB mainboard, 151-metal pin, 152-grounding end, 16-film substrate, 17-optical adhesive, 18-protective film, 19-conductive adhesive tape, 191-insulating adhesive film, 192-conductive adhesive film, 193-insulating layer, 200-shell, 30-electric contact part, 40-structural adhesive layer, 50-FPC, 60-grounding electrode, 70-display module, 102-step part and 201-buckling position.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 4-10, an embodiment of the present invention provides an electronic device, which includes a touch screen 100, a PCB motherboard 15, and a housing 200.

Structurally, the touch screen 100 includes a cover plate 10 and a Sensor. In this embodiment, the touch screen 100 can be an OGS touch screen 100 or a film touch screen 100. Preferably, the touch screen 100 is a film touch screen 100. Film, the english name Film, is also known as Film. The Sensor of the film touch screen 100 is a film Sensor including a film substrate 16 and an electrode pattern layer, and the film substrate 16 is, for example, a PET material. The film sensor is bonded to the cover plate 10 by an optical glue 17. The optical cement 17 is, for example, OCA optical cement. The electrode pattern layer includes a plurality of touch electrodes 12 located in the transparent touch area 100 b. The touch electrode 12 may be an ITO trace or a conductive material such as nano silver. The cover plate 10 may be made of glass or a composite plate such as PMMA.

As shown in fig. 4, the touch screen 100 includes a touch area 100b and a frame area 100 a. Preferably, the frame area 100a is disposed around the touch area 100 b. As shown in fig. 6, an ink layer 11 is disposed on the back surface of the cover plate 10 in the frame area 100a, and the ink layer 11 forms the frame area 100a on the cover plate 10, and the frame area 100a is generally opaque. In the process of manufacturing the ink layer, the ink layer may be a single layer, or two or more layers may be printed. The middle area surrounded by the frame area 100a is generally referred to as a visible area, and is also referred to as a touch area 100b in the touch screen 100.

The touch screen 100 is provided with a plurality of contact electrodes 14 in a bezel region. The contact electrodes 14 are electrically connected through the signal transmission line touch electrodes 12. The contact electrode 14 may be a molybdenum trace, or may be a metal, such as silver, copper, or other conductive materials. And are not intended to be limiting herein.

The electronic device also has a plurality of electrical contacts 30, the electrical contacts 30 being electrically connected to the PCB main board 15 of the electronic device. The touch IC of the touch screen is integrated on the PCB main board 15. A conductive adhesive tape 19 is disposed between the contact electrode 14 and the electrical contact 30, and the contact electrode 14 of the touch screen 100 is electrically connected to the electrical contact 30 through the conductive adhesive tape 19.

In the present embodiment, as shown in fig. 8 to 10, the conductive adhesive tape 19 is a zebra stripe formed by an insulating film 191 and a conductive film 192 disposed at an interval. At the cross section of the conductive rubber strip 19, the insulating rubber sheet 191 and the conductive rubber sheet 192 are arranged perpendicular to the touch screen 100.

In the conventional electrical connection structure between the touch screen 100 and the PCB main board 15, the binding pins of the touch electrodes 12 are concentrated at one position, then bound with the FPC, and then connected with the PCB main board 15 through the FPC. In the structure of the application, the binding pin-contact electrodes 14 are arranged in a plurality, so that a Flexible Printed Circuit (FPC) and an Anisotropic Conductive Film (ACF) are omitted, and the touch electrodes 12 of the sensor layer are electrically connected with a Printed Circuit Board (PCB) 15 by using the conductive adhesive tapes 19. According to the application, on one hand, the structural space occupied by the FPC in the traditional design is reduced; on the other hand, under the condition that the shape of the frame area is symmetrical relative to the shape of the touch area, the boundary area can be narrower, the appearance design of a narrow frame or a full screen is facilitated, and the development requirements of circular touch screen electronic products such as pure circles and narrow frames are particularly facilitated to be met.

Meanwhile, the conductive adhesive tape 19 has good elasticity, and when the contact electrode 14 on the touch screen 100 is electrically connected with the electrical contact part 30, the gap caused by the assembly tolerance can be effectively compensated by the proper elastic deformation of the conductive adhesive tape 19, so that the electrical contact part 30 and the contact electrode 14 are better contacted, and poor contact caused by the gap between the touch screen 100 and the part (such as the shell 200) where the electrical contact part 30 is located is avoided.

A plurality of contact electrodes 14 are dispersed in the frame region 100 a; the distribution may be in a half area of the frame area, may be in a 3/4 area, or may be in the whole area. Preferably, as shown in fig. 4, the plurality of contact electrodes 14 are dispersed throughout the frame region 100 a.

Since the plurality of contact electrodes 14 are dispersed throughout the border area 100a, the shape of the bead of conductive adhesive 19 is preferably circular and matches the shape of the border area. The annular rubber strip can be sleeved or embedded into the shell 200 for fixing.

Preferably, as shown in fig. 8, the annular inner side and the annular outer side of the bead 19 are provided with insulating layers 193, respectively.

The side insulation mainly prevents the conductive rubber sheet 192 of the conductive rubber strip 19 from being conducted with the side metal or wire. It can be understood that the widths of the conductive rubber sheet 192 and the insulating rubber sheet 191 of the conductive rubber strip 19 are small, so that the situation that the same conductive rubber sheet 192 is connected with a plurality of contact electrodes 14 at the same time does not occur.

The electrical contacts 30 have good electrical conductivity, and preferably, the number of electrical contacts 30 is the same as the number of corresponding contact electrodes 14. Specific embodiments of the electrical contact 30 are as follows:

in a particular embodiment, the electrical contacts 30 may also be provided on separate electrical connectors (not shown). The electrical connector is located inside the housing 200 and fixed at the housing 200.

In another specific embodiment, as shown in fig. 5, the PCB main board 15 is provided with an electrical contact 30 on a side facing the touch screen 100, and the position of the electrical contact 30 corresponds to the position of the contact electrode 14. The electrical connection 30 is a part of the PCB main board 15. For example, the metal pins 151 are exposed at positions corresponding to the contact electrodes 14 on the PCB main board 15, and the PCB main board 15 is electrically connected to the contact electrodes 14 through the metal pins 151. The metal pins 151 are, for example, copper pins. The solution of this embodiment, in which the electrical contact 30 is directly disposed on the PCB main board 15, is simple in structure and space-saving, and is a preferable solution.

The touch area 100b and the frame area 100a are circular in shape in fig. 4, and in other embodiments, the touch area 100b and the frame area 100a may also be rectangular. In the application, the electronic device may be any product or component with a display function, such as a smart watch, a smart bracelet, and a smart phone. Other essential components of the electronic device should be understood by those skilled in the art, and are not described herein nor should they be construed as limitations of the present invention.

Preferably, the viewing area of the electronic device is circular, and more preferably, the frame area 100a is circular. Specifically, for example, the electronic device is, for example, a circular watch with the touch screen 100, and the structural scheme of this embodiment can make the frame area be a circular shape when manufacturing the circular watch with the dial plate, so that the appearance is more aesthetic, and the manufacturing of a product with a narrow frame is facilitated. When the viewing area of the electronic device is circular, the shape of the conductive strip 19 is preferably circular.

Preferably, as shown in fig. 4, a ground electrode 60 is disposed between two adjacent contact electrodes 14 in the frame area of the touch screen 100. As shown in fig. 9, the ground electrode 60 is electrically connected to the PCB main board 15 through the conductive adhesive tape 19. For example, as shown in fig. 5, a ground terminal 152 is provided on the PCB main board 15 at a position corresponding to the ground electrode 60. By providing the ground electrode 60, ESD protection of the electronic product and circuit immunity may be enhanced.

The contact electrode 14 is electrically connected to the electrode pattern layer. The contact electrode 14 is made of metal, preferably silver, and is made of metal copper or ITO.

The back of the electrode pattern layer 16 is also covered with a protective film 18. The protective film is transparent and can be an optical film or an adhesive explosion-proof film. The contact electrode 14 is exposed so as to be electrically connected to the electrical contact 30, but the conductive portion of the frame area 100a other than the touch electrode 1214 and the ground electrode 60 is covered with the protective film 18. The signal transmission line is also covered with a protective film 18, and the protective film 18 also functions to protect the signal transmission line.

The electronic device further includes a display module 70, and the display module 70 is located at the back of the touch screen 100. A support member is provided between the display module and the PCB main board 15.

It should be noted that the touch screen 100 in this embodiment may include a single-layer film sensor, or may be a two-layer film sensor, and the two film sensor layers are adhered together by an optical adhesive. The touch screen 100 with the two-film sensor layer structure is well known to those skilled in the art and will not be described in detail herein.

The fixing mode of the housing 200 has the following scheme:

in the first scheme, as shown in fig. 6, a step portion 102 is provided at an edge of a cover plate 10 of a film touch screen 100; meanwhile, a buckling position 201 is arranged on the housing 200, and the housing 200 is buckled on the step part 102 of the cover plate 10 through the buckling position 201. Since the film-structured touch panel 100 is formed by molding the cover plate 10 and then attached to the film substrate 16, the cover plate 10 is manufactured without considering the influence on the film sensor, and thus, the cover plate 10 may be first formed with a step shape and then tempered, and then attached to the film substrate 16 after molding. The shell 200 plays a role in fixing the touch screen 100 after being buckled, and the conductive adhesive tape 19 can also connect the PCB main board 15 and the contact electrode 14 of the film sensor through buckling pressure to play a role in connecting a touch function, so that the operation is more convenient and faster by utilizing a buckled assembly mode; compared with an adhesive mode, the method is more favorable for reworking and maintaining.

In a second alternative embodiment, as shown in fig. 7, a structural adhesive layer 40 is disposed between the housing 200 and the touch screen 100; alternatively, the PCB main board 15 and the housing 200 are respectively provided with a structural adhesive layer 40 between the touch screen 100 and the structural adhesive layer. The structural adhesive layer 40 has no electrical conductivity.

Compared with the prior art, the utility model has the advantages of as follows:

in the traditional electric connection structure of the touch screen and the PCB mainboard, binding pins of touch electrodes are concentrated at one position and then are firstly bound with the FPC, and then are connected with the PCB mainboard through the FPC; according to the structure, the number of the binding pin-contact electrodes is multiple, the FPC is omitted, and the conductive adhesive tape is adopted to electrically connect the touch electrode of the sensor layer with the PCB mainboard. On one hand, the structural space occupied by the FPC in the traditional design is reduced; on the other hand, under the condition that the shape of the frame area is symmetrical relative to the shape of the touch area, the boundary area can be narrower, the appearance design of a narrow frame or a full screen is facilitated, and the development requirements of circular touch screen electronic products such as pure circles and narrow frames are particularly facilitated to be met. Meanwhile, the conductive adhesive tape has good elasticity, and when the contact electrode 14 on the touch screen is electrically connected with the electric contact part 30, the proper elastic deformation of the conductive adhesive tape can effectively make up for a gap caused by assembly tolerance, so that the electric contact part 30 is better contacted with the contact electrode 14, and poor contact caused by the gap between the touch screen and a part (such as a shell) where the electric contact part 30 is located is avoided.

It will be understood that modifications and variations can be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

1. An electronic device with a touch screen comprises the touch screen and a PCB mainboard, and is characterized in that,

the touch screen comprises a visible area and a frame area surrounding the visible area, and a plurality of contact electrodes are arranged in the frame area of the touch screen;

the electronic equipment is also provided with a plurality of electric contacts which are electrically connected with a PCB mainboard of the electronic equipment;

and a conductive adhesive tape is arranged between the contact electrode and the electric contact part, and the contact electrode of the touch screen is electrically connected with the electric contact part through the conductive adhesive tape.

2. The electronic device according to claim 1, wherein the plurality of contact electrodes are arranged dispersed in a frame region.

3. The electronic device according to claim 2, wherein a grounding electrode is arranged between two adjacent contact electrodes on the touch screen, and the grounding electrode is electrically connected with the PCB mainboard through a conductive adhesive tape.

4. The electronic device of claim 1, wherein the visual area of the electronic device is circular.

5. The electronic device according to claim 1, wherein an electrical contact part is arranged on a surface of the PCB main board facing the touch screen, corresponding to the position of the contact electrode, and the electrical contact part is a metal pin.

6. The electronic device according to claim 1, wherein the touch screen is a film touch screen, the film touch screen comprises a cover plate and a film sensor, the film sensor comprises a film substrate and an electrode pattern layer, and the contact electrode is electrically connected with the electrode pattern layer;

a step part is arranged at the edge of the cover plate; the electronic equipment further comprises a shell, wherein a buckling position is arranged on the shell, and the shell is buckled on the cover plate.

7. The electronic device of claim 1, wherein the conductive adhesive tape is a zebra stripe formed by an insulating adhesive tape and a conductive adhesive tape which are spaced apart from each other.

8. The electronic device according to claim 7, wherein the shape of the conductive adhesive tape is annular and matches with the shape of the frame area; and the annular inner side and the annular outer side of the conductive rubber strip are respectively provided with an insulating layer.