CN107315497A - Contact panel and display device - Google Patents

Abstract

The invention discloses a touch panel, the touch panel includes a transparent conductive film, a flexible circuit board and a cover plate, the cover plate and the transparent conductive film are stacked, the transparent conductive film includes a main body and an extension part, the extension part is connected to one end edge of the main part, the projection of the cover plate in the vertical direction of the transparent conductive film forms a projected area, and the main part coincides with the projected area or is located in the projected area Within the scope of the projection area, the extension is located outside the projection area, the flexible circuit board is fixedly connected to the extension, and the flexible circuit board is used to electrically connect the transparent conductive film and the main board, so that the main body The touch signal received by the external part is transmitted to the main board. The invention also discloses a display device. On the premise of not affecting the electrical connection between the touch panel and the main board, the size of the visible area is increased, the screen ratio of the display device is increased, and the user experience is greatly improved.

Description

Touch panel and display device

technical field

The present invention relates to the field of display technology, in particular to a touch panel and a display device.

Background technique

With the development of science and technology, the touch technology of display screens has also been developed rapidly. Touch screens are widely used in electronic devices such as mobile phones, computers, e-books, and tablet computers, and have become an indispensable part of people's lives. With the emergence of various touchable display devices, consumers have higher and higher requirements on the aesthetics and performance of touch screens. Capacitive touch screen is a touch structure widely used in display devices. The capacitive touch screen with plug-in structure is mainly GF (Glass-Film) structure or GFF (Glass-Film-Film) structure, that is, glass cover-film The structure of the electrode or the structure of glass cover plate-film electrode-film electrode, and the film electrode needs to be bound to the flexible circuit board (Flexible Printed Circuit, FPC) at one end of the touch panel, so as to realize the connection with other electronic devices of the display device. electrical connection.

In the prior art, the middle part of the touch panel is the visible area, and the edge of the visible area is bound and connected to the flexible circuit board at the top or bottom of the touch panel through opaque metal leads, so as to realize the connection between the flexible circuit board and the flexible circuit board. The electrical connection of the thin film electrode, and then the flexible circuit board is folded and connected to the main board. In order to display the overall aesthetic effect of the device, it is necessary to print a black frame on the top or bottom of the glass cover corresponding to the position of the flexible circuit board to cover the flexible circuit board, thereby reducing the size of the visible area and reducing the screen ratio of the display device. Greatly reduces the user experience.

Contents of the invention

The technical problem to be solved by the present invention is to provide a touch panel and a display device, which are used to solve the problem that the top or bottom frame of the touch panel in the prior art is wide, the visible area is small, the screen ratio is low, and the user experience is poor. bad question.

In order to solve the above technical problems, the present invention provides a touch panel, the touch panel includes a transparent conductive film, a flexible circuit board and a cover plate, the cover plate and the transparent conductive film are laminated, and the transparent conductive film It includes a main body and an extension, the extension is connected to one end edge of the main body, the projection of the cover plate in the vertical direction of the transparent conductive film forms a projected area, and the main body overlaps with the projected area Or located within the scope of the projection area, the extension is located outside the projection area, the flexible circuit board is fixedly connected to the extension, and the flexible circuit board is used to electrically connect the transparent conductive film and the main board, The touch signal received by the main body is transmitted to the main board. In this way, the extension part is used to bind the flexible circuit board, and the cover plate does not cover the extension part, so that the flexible circuit board is not placed under the cover plate, and the black frame of the cover plate does not need to cover the flexible circuit board, thereby reducing the size of the black frame , without affecting the electrical connection between the touch panel and the main board, the size of the visible area is increased, the screen ratio of the display device is increased, and the user experience is greatly improved.

Further, the extension part includes a bent end and a fixed end, the bent end is connected between the fixed end and the main body, and the size of the bent end is smaller than that of the fixed end, and the fixed end The end is provided with a first binding point, the flexible circuit board is provided with a second binding point, and the first binding point is in contact with the second binding point and is electrically connected to each other. The size of the bent end in the width direction of the touch panel is much smaller than that of the fixed end, thereby improving the bending flexibility of the bent end, which is conducive to improving the flexibility of the extension, and the connection between the main board and the touch panel is more flexible.

Further, the main body part is provided with a touch electrode and a first conductive lead, and the extension part is provided with a second conductive lead, and the first conductive lead is located at the edge of the touch electrode and is electrically connected to the touch electrode The second conductive lead is electrically connected to the first binding point, so that the touch electrode is electrically connected to the first binding point.

Further, the touch panel further includes a reinforcing sheet, and both the flexible circuit board and the fixed end are attached to the same side surface of the reinforcing sheet. The reinforcing sheet here is used to support the fixed end of the transparent conductive film, so as to avoid the situation that the fixed end is easily broken or the fixed end is separated from the flexible circuit board due to the soft and thin feature of the extension.

Further, the reinforcing sheet includes a first bonding area and a second bonding area, the fixed end is bonded to the first bonding area, and the flexible circuit board is bonded to the second bonding area , the first bonding area and the second bonding area do not intersect. In this way, the first bonding area and the second bonding area do not intersect to ensure that the first bonding point and the second bonding point are the only positions for contacting and electrically connecting the fixed end with the flexible circuit board, avoiding the second bonding point on the fixed end. The two conductive leads contact the flexible circuit board and are electrically connected to cause a short circuit.

Further, the flexible circuit board includes an adhesive part attached to the second bonding area, and a sealant is coated between the first bonding area and the second bonding area, so that the fixed end Insulate from the sticking part. This can ensure that the first binding point and the second binding point are the only positions where the fixed end contacts and electrically connects with the flexible circuit board, preventing the second conductive lead on the fixed end from contacting the flexible circuit board and causing a short circuit due to electrical connection.

Further, the extension part includes a conductive surface provided with the second conductive lead, and the conductive surface is covered with an insulating layer for protecting the second conductive lead. In this way, when the extension part is bent, the conductive surface is easy to contact with other electronic devices in the display device, and the insulating layer isolates the second conductive lead from other electronic devices. The situation where other electronic devices are electrically connected occurs.

Further, the main body part includes a first main body part and a second main body part, the extension part includes a first extension part and a second extension part, and the first extension part is connected to one end edge of the first main body part to form a The first transparent conductive film, the second extension part is connected to an end edge of the second main body to form a second transparent conductive film, the first main body and the second main body are stacked, the first The projection of the extending portion in the vertical direction of the second transparent conductive film does not intersect with the second extending portion. The first extension part and the second extension part do not intersect to reduce the thickness of the extension part, and the first extension part and the second extension part are bent separately, so as to avoid the overlapping of the first extension part and the second extension part to cause the thickness to be too large and not easy to bend fold.

Further, the main body part and the extension part are integrally formed. In this way, the forming method of the transparent conductive film is simple and easy to realize, and the production cost is reduced.

The present invention also provides a display device. The display device includes a display panel, a motherboard, and any one of the touch panels described above. The display panel and the touch panel are stacked. The display panel outputs images and Displayed through the transparent area of the touch panel, the touch panel is electrically connected to the main board through the flexible circuit board, so that the touch signal received by the touch panel is transmitted to the main board.

The beneficial effects of the present invention are as follows: the extension part is used to bind the flexible circuit board, the cover plate does not cover the extension part, so the flexible circuit board is not placed under the cover plate, and the black frame of the cover plate does not need to cover the flexible circuit board, thereby reducing The size of the black border is reduced, without affecting the electrical connection between the touch panel and the motherboard, the size of the visible area is increased, the screen ratio of the display device is increased, and the user experience is greatly improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other obvious deformations can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a touch panel provided by Embodiment 1 of the present invention.

FIG. 2 is a partially enlarged schematic view of the touch panel provided by Embodiment 1 of the present invention.

FIG. 3 is a partially enlarged schematic view of the transparent conductive film provided by Embodiment 1 of the present invention.

FIG. 4 is a schematic structural diagram of a flexible circuit board provided by Embodiment 1 of the present invention.

Fig. 5 is a schematic structural diagram of a reinforcing sheet provided by Embodiment 1 of the present invention.

FIG. 6 is a schematic structural diagram of a touch panel provided by Embodiment 2 of the present invention.

FIG. 7 is a partially enlarged structural schematic diagram of the touch panel provided by Embodiment 2 of the present invention.

FIG. 8 is a partially enlarged schematic view of the first transparent conductive film provided by Embodiment 2 of the present invention.

FIG. 9 is a partially enlarged schematic view of the second transparent conductive film provided by Embodiment 2 of the present invention.

FIG. 10 is a schematic structural diagram of a flexible circuit board provided by Embodiment 2 of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , the touch panel provided by Embodiment 1 of the present invention includes a transparent conductive film 10 , a flexible circuit board 20 and a cover plate 30 , and the cover plate 30 and the transparent conductive film 10 are laminated. Specifically, The cover plate 30 is located on the side of the transparent conductive film 10 away from the display panel of the display device, that is, the side where the display device displays images. In a preferred embodiment, the cover plate 30 is made of glass, and in other embodiments, the cover plate 30 can also be made of other transparent materials such as plastic. In this embodiment, the transparent conductive film 10 is made of conductive material, and the transparent conductive film 10 is used to receive the user's touch, and convert the information contained in the user's touch into a touch signal (electrical signal) and transmit it to the main board of the display device for processing. Device Handling Analysis. Furthermore, the transparent conductive film 10 also has the feature of high transparency, so that the light emitted by the display panel and containing the image information can be transmitted to the user through the touch panel and the cover plate 30 .

The transparent conductive film 10 includes a main body 12 and an extension 14. The extension 14 is connected to one end edge of the main body 12. Specifically, the extension 14 has a bendable feature, so that the extension 14 can be bent arbitrarily relative to the main body 12. fold. The main body 12 is the part of the touch panel used to contact the user's finger, and the main body 12 corresponds to the display panel of the display device. In a preferred embodiment, the extension 14 is connected to one end of the main body 12 in the length direction, that is, The top end or the bottom end, in other embodiments, the extension portion 14 may also be connected to one end of the main body portion 12 in the width direction.

The projection of the cover plate 30 in the vertical direction of the transparent conductive film 10 forms a projection area, the main body 12 coincides with or is located within the projection area, and the extension portion 14 is located outside the projection area. Specifically, the cover plate 30 protects the main body 12 to prevent the main body 12 from being exposed. The edge of the cover plate 30 is provided with a black border 300 for shielding the conductive leads on the edge of the touch panel. The extension portion 14 protrudes from one end edge of the cover plate 30 , and the cover plate 30 does not cover the extension portion 14 . The flexible circuit board 20 is fixedly connected to the extension part 14 , and the flexible circuit board 20 is used for electrically connecting the transparent conductive film 10 and the main board, so that the touch signal received by the main body part 12 is transmitted to the main board. Further, one connection end of the flexible circuit board 20 is connected to the extension part 14 , and the other connection end is connected to the main board, so as to electrically connect the main board to the touch panel.

The extension part 14 is used to bind the flexible circuit board 20, and the cover plate 30 does not cover the extension part 14, so that the flexible circuit board 20 is not placed under the cover plate 30, and the black frame 300 of the cover plate 30 does not need to cover the flexible circuit board 20, thereby The size of the black frame 300 is reduced, and without affecting the electrical connection between the touch panel and the motherboard, the size of the visible area is increased, the screen-to-body ratio of the display device is increased, and the user experience is greatly improved.

Please refer to FIG. 4 , in this embodiment, the extension part 14 includes a bent end 142 and a fixed end 144 , the bent end 142 is connected between the fixed end 144 and the main body 12 , and the size of the bent end 142 is smaller than that of the fixed end 144 The fixed end 144 is provided with a first binding point 52, the flexible circuit board 20 is provided with a second binding point 54, and the first binding point 52 is in contact with the second binding point 54 and is electrically connected to each other. Specifically, the bent end 142 is the part where the extension part 14 plays a bending role, and the fixed end 144 and the main body part 12 can be bent arbitrarily through the bending section, so that the extension part 14 can be bent to the flexible circuit board 20 after being bound. Behind the main board, there is no need to set the black frame 300 to cover the flexible circuit board 20 . The fixed end 144 is fixedly connected to the flexible circuit board 20 , and the first binding point 52 contacts the second binding point 54 to realize the electrical connection between the fixed end 144 and the flexible circuit board 20 . In a preferred embodiment, the first binding point 52 is metal protruding on the surface of the fixed end 144 , and the second binding point 54 is metal protruding on the flexible circuit board 20 . In this embodiment, the size of the bent end 142 is smaller than the size of the fixed end 144. Specifically, the size of the bent end 142 in the width direction of the touch panel is much smaller than the size of the fixed end 144, thereby improving the bending of the bent end 142. The folding flexibility is beneficial to improve the flexibility of the extension part 14, and the connection between the main board and the touch panel is more flexible.

In this embodiment, specifically referring to FIG. 3 , the main body 10 is provided with a touch electrode 122 and a first conductive lead 124a, and the extension part 14 is provided with a second conductive lead 124b, and the first conductive lead 124a is located on the edge of the touch electrode 122 and The touch electrode 122 is electrically connected to the second conductive lead 124 b, and the second conductive lead 124 b is electrically connected to the first binding point 52 , so that the touch electrode 122 is electrically connected to the first binding point 52 . FIG. 3 only shows part of the first conductive lead 124a and the second conductive lead 124b. In fact, each touch electrode 122 is connected to a first conductive lead 124a, and each contact point of the first binding point 52 is connected to a The second conductive leads 124b, and each first conductive lead 124a is correspondingly connected to one second conductive lead 124b. Furthermore, the touch electrode 122 is formed by patterning the surface of the main body 12 , and the touch electrode 122 is used to sense the touch of the user's finger. In a preferred implementation manner, the first conductive leads 124 a are distributed in the edge area of the touch panel, so that the black frame 300 corresponding to the cover plate 30 is also located in the edge area of the cover plate 30 .

In this embodiment, the touch panel further includes a reinforcing sheet 40 , and the flexible circuit board 20 and the fixed end 144 are attached to the same surface of the reinforcing sheet 40 . Specifically, the reinforcing sheet 40 is attached to the flexible circuit board 20 by double-sided tape, and the reinforcing sheet 40 is used to support the fixed end 144 of the transparent conductive film 10, so as to prevent the fixed end 144 from being easily Breakage or detachment of the fixed end 144 from the flexible circuit board 20 . In one embodiment, the reinforcing sheet 40 is a material with certain hardness and not easy to bend, such as polyethylene terephthalate (PET) or glass fiber epoxy resin copper clad laminate (FR4).

In this embodiment, referring to FIG. 5 , the reinforcing sheet 40 includes a first bonding region 402 and a second bonding region 404, the fixed end 144 is bonded to the first bonding region 402, and the flexible circuit board 20 is bonded to the second bonding region 402. The bonding area 404, the first bonding area 402 and the second bonding area 404 do not intersect. Specifically, between the flexible circuit board 20 and the reinforcing sheet 40 , and between the fixed end 144 and the reinforcing sheet 40 are pasted by double-sided adhesive tape. The first bonding area 402 is the part where the fixed end 144 is bonded to the reinforcing sheet 40, the second bonding area 404 is the part where the flexible circuit board 20 is bonding the reinforcing sheet 40, the first bonding area 402 and the second bonding The regions 404 do not intersect to ensure that the first bonding point 52 and the second bonding point 54 are the only contact and electrical connection positions between the fixed end 144 and the flexible circuit board 20, so as to prevent the second conductive lead 124b on the fixed end 144 from contacting the flexible circuit board 20. The circuit boards 20 contact and are electrically connected resulting in a short circuit. Further, the first bonding area 402 corresponds to avoid the routing area of the fixed end 144 to avoid crushing the second conductive lead 124b.

In this embodiment, the flexible printed circuit board 20 includes an adhesive part 202 attached to the second attaching area 404, and the sealant 60 is coated between the first attaching area 402 and the second attaching area 404, so that the fixed end 144 Insulate from the sticking part 202, that is, ensure that the first binding point 52 and the second binding point 54 are the only contact and electrical connection positions between the fixed end 144 and the flexible circuit board 20, and avoid the second conductive lead 124b on the fixed end 144 Contacting the flexible circuit board 20 for electrical connection results in a short circuit.

In this embodiment, the extension part 14 includes a conductive surface provided with a second conductive lead 124b, and the conductive surface is covered with an insulating layer for protecting the second conductive lead 124b. Specifically, when the extension part 14 is bent, the conductive surface is easy to contact other electronic devices in the display device, and the insulating layer isolates the second conductive lead 124b from other electronic devices, even if the extension part 14 contacts other electronic devices, it will not occur. This occurs when the touch panel is electrically connected to other electronic devices.

The extension part 14 is used to bind the flexible circuit board 20, and the cover plate 30 does not cover the extension part 14, so that the flexible circuit board 20 is not placed under the cover plate 30, and the black frame 300 of the cover plate 30 does not need to cover the flexible circuit board 20, thereby The size of the black frame 300 is reduced, and without affecting the electrical connection between the touch panel and the motherboard, the size of the visible area is increased, the screen-to-body ratio of the display device is increased, and the user experience is greatly improved.

Please refer to Fig. 6, Fig. 7, Fig. 8 and Fig. 9, the difference between the touch panel provided by the second embodiment of the present invention and the first embodiment is that the number of transparent conductive films 10 is two, specifically, the main body 12 includes the first The main body 102a and the second main body 104a, the extension 14 includes a first extension 102b and a second extension 104b, the first extension 102b is connected to one end edge of the first main body 102a to form a first transparent conductive film 102, the second Two extensions 104b are connected to one end edge of the second main body 104a to form the second transparent conductive film 104, the first main body 102a and the second main body 104a are laminated, the first extension 102b is vertical to the second transparent conductive film 104 The projection of the direction does not intersect the second extension 104b. Further, the first extension part 104a and the second extension part 104b do not intersect to reduce the thickness of the extension part 14, and the first extension part 102b and the second extension part 104b are bent separately to avoid the first extension part 102b and the second extension part The overlapping of the portion 104b results in too much thickness to be easily bent.

In this embodiment, with reference to FIG. 7 and FIG. 10 , the flexible circuit board 20 is provided with two second binding points 54, and the two second binding points 54 are respectively connected to the first binding point 52 and the first extension point 102b of the first extension 102b. The first bonding point 52 of the second extension portion 104b contacts and is electrically connected, so that both the first transparent conductive film 102 and the second transparent conductive film 104 are electrically connected to the flexible circuit board 20 to form a touch panel with a GFF structure.

The extension part 14 is used to bind the flexible circuit board 20, and the cover plate 30 does not cover the extension part 14, so that the flexible circuit board 20 is not placed under the cover plate 30, and the black frame 300 of the cover plate 30 does not need to cover the flexible circuit board 20, thereby The size of the black frame 300 is reduced, and without affecting the electrical connection between the touch panel and the motherboard, the size of the visible area is increased, the screen-to-body ratio of the display device is increased, and the user experience is greatly improved.

The transparent conductive film 10 provided by the embodiment of the present invention is one of nanometer metal, metal oxide, graphene and nanotube. The above materials are transparent, conductive, and bendable, so that they can not only meet the requirements of the main body 12 on transparency and conductivity, but also meet the requirements of the extension portion 14 on flexibility and bendability.

Further, the main part 12 and the extension part 14 of the transparent conductive film 10 provided by the embodiment of the present invention are integrally formed, and the forming method is simple and easy to realize, which reduces the production cost.

The embodiment of the present invention also provides a display device. The display device includes a display panel, a main board, and the above-mentioned touch panel. The display panel and the touch panel are stacked. The touch panel is electrically connected to the main board through the flexible circuit board 20, so that the touch signal received by the touch panel is transmitted to the main board.

In this embodiment, the display device includes a mobile phone, a tablet computer, a television, and the like.

Further, the display device also includes a housing and a battery, the battery is used to supply power to the main board, and the housing accommodates the main board, battery, touch panel and display panel to protect the internal components and appearance of the display device.

The extension part 14 is used to bind the flexible circuit board 20, and the cover plate 30 does not cover the extension part 14, so that the flexible circuit board 20 is not placed under the cover plate 30, and the black frame 300 of the cover plate 30 does not need to cover the flexible circuit board 20, thereby The size of the black frame 300 is reduced, and without affecting the electrical connection between the touch panel and the motherboard, the size of the visible area is increased, the screen-to-body ratio of the display device is increased, and the user experience is greatly improved.

The above disclosures are only several preferred embodiments of the present invention, and of course the scope of rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (10)

1. a kind of contact panel, it is characterised in that the contact panel includes nesa coating, flexible PCB and cover plate, institute State cover plate and be laminated setting with the nesa coating, the nesa coating includes main part and extension, and the extension connects An end margin of the main part is connected to, the cover plate forms projected area in the projection of the vertical direction of the nesa coating, The main part is overlapped with the projected area or in the range of the projected area, and the extending part is in the outer of the projected area Portion, the flexible PCB is fixedly connected with the extension, the flexible PCB be used to electrically connecting the nesa coating with Mainboard, so that the touching signals that the main part is received are transferred to the mainboard.

2. contact panel according to claim 1, it is characterised in that the extension includes bending end and fixing end, institute Bending end is stated to be connected between the fixing end and the main part, and the size of the bending end is less than the fixing end Size, the fixing end is provided with the first binding point, and the flexible PCB is provided with the second binding point, first binding point and institute The second binding point is stated to contact and be electrically connected to each other.

3. contact panel according to claim 2, it is characterised in that the main part is conductive provided with touch control electrode and first Lead, the extension is provided with the second conductive lead wire, and first conductive lead wire is located at the edge of the touch control electrode and is electrically connected The touch control electrode and second conductive lead wire are connect, second conductive lead wire electrically connects first binding point, so that The touch control electrode is electrically connected to first binding point.

4. contact panel according to claim 3, it is characterised in that the contact panel also includes reinforcing chip, described soft Property circuit board and the fixing end fit in the same side surface of the reinforcing chip.

5. contact panel according to claim 4, it is characterised in that the reinforcing chip includes the first fit area and second Fit area, the fixing end fits in first fit area, and the flexible PCB fits in second conformable region Domain, first fit area and second fit area are non-intersect.

6. contact panel according to claim 5, it is characterised in that the flexible PCB includes second patch of fitting The paste section in region is closed, sealing is coated between first fit area and second fit area, so that the fixation Insulated with paste section at end.

7. contact panel according to claim 6, it is characterised in that the extension includes drawing provided with second conduction The conducting surface of line, the conducting surface is covered with insulating barrier, for protecting second conductive lead wire.

8. the contact panel according to claim 1 to 7 any one, it is characterised in that the main part includes the first master Body portion and the second main part, the extension include the first extension and the second extension, and first extension is connected to institute An end margin the first nesa coating of formation of the first main part is stated, second extension is connected to second main part One end margin the second nesa coating of formation, first main part is stacked with second main part, and described first prolongs Extending portion is non-intersect in the projection of the vertical direction of second nesa coating and the second extension.

9. contact panel according to claim 1, it is characterised in that the main part and the extension are integrally formed.

10. a kind of display device, it is characterised in that the display device includes display panel, mainboard and claim 1 to 9 times Contact panel described in meaning one, the display panel is stacked with the contact panel, the display panel output image And shown through the transparent region of the contact panel, the contact panel electrically connects the master by the flexible PCB Plate, so that the touching signals that the contact panel is received are transferred to the mainboard.