CN216772317U

CN216772317U - Touch control PCB and notebook computer

Info

Publication number: CN216772317U
Application number: CN202220553281.3U
Authority: CN
Inventors: 贺彩瑞; 李合成; 罗亮
Original assignee: Lansi Technology Xiangtan Co ltd Shenzhen Branch
Current assignee: Lansi Technology Xiangtan Co ltd Shenzhen Branch
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-06-17
Anticipated expiration: 2032-03-14

Abstract

The utility model discloses a touch PCB and a notebook computer, wherein the touch PCB comprises a touch PCB body, an NFC isolation layer positioned on one side of the touch PCB body, and an NFC wiring layer positioned on one side of the NFC isolation layer opposite to the touch PCB body; PCB substrates are arranged between the touch PCB body and the NFC isolation layer and between the NFC isolation layer and the NFC wiring layer; the NFC wiring layer is provided with annular NFC antenna, and the NFC isolation layer is provided with the headroom region corresponding to the region of the NFC antenna, and the headroom region is provided with a gap, and the value range of the gap width includes endpoint values between 2mm to 3 mm. The NFC antenna can be isolated from the touch PCB body by arranging the isolation layer, so that the influence of the NFC antenna on the touch circuit is avoided; and the set gap can ensure the normal work of the NFC antenna.

Description

Touch control PCB and notebook computer

Technical Field

The utility model relates to the technical field of touch panels, in particular to a touch PCB and a notebook computer.

Background

With the technical development of NFC (Near Field Communication) antennas becoming more and more mature, NFC antennas are also more and more commonly used in daily life of people, not only are NFC antennas used in bus access cards, but also NFC functions are added to more and more portable electronic products, such as mobile phones, notebook computers, and the like.

In the notebook computer, the NFC antenna is combined with the touch pad, and the mobile phone with the NFC function touches the touch pad of the notebook computer to trigger connection, so that resources such as data pictures and the like can be conveniently and quickly transmitted. Therefore, how to provide a Printed Circuit Board (PCB) is a problem that those skilled in the art will continuously solve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a touch control PCB and a notebook computer, which can integrate an NFC antenna with the touch control PCB.

In order to solve the technical problem, in a first aspect, the present invention provides a touch PCB, including a touch PCB body, an NFC isolation layer located at one side of the touch PCB body, and an NFC routing layer located at a side of the NFC isolation layer opposite to the touch PCB body; PCB substrates are arranged between the touch PCB body and the NFC isolation layer and between the NFC isolation layer and the NFC wiring layer;

the NFC routing layer is provided with an annular NFC antenna, a clearance area is arranged in an area, corresponding to the NFC antenna, of the NFC isolation layer, a gap is arranged in the clearance area, and the value range of the gap width is between 2mm and 3mm and comprises end points; the gaps include a first gap extending in a first direction and a second gap extending in a second direction, the first gap intersecting the second gap.

Optionally, the gaps are evenly distributed in the clearance area.

Optionally, the first gap and the second gap are perpendicular to each other.

Optionally, the gaps are distributed in a shape of a king.

Optionally, the gaps are distributed in a shape of a Chinese character 'zhong'.

Optionally, the NFC antenna includes a microstrip line annularly distributed around a plurality of turns.

Optionally, the number of turns surrounded by the microstrip line ranges from 2 to 4, inclusive.

Optionally, the head and the tail of the microstrip line are provided with feed points; two through holes are formed in the PCB substrate between the NFC isolation layer and the NFC routing layer, and the through holes are connected with the feed points in a one-to-one correspondence mode; the via hole orientation NFC isolation layer side end is provided with the connecting wire, the connecting wire is located the clearance.

Optionally, the NFC wiring layer further includes a matching circuit and a driving circuit electrically connected to the NFC antenna.

In a second aspect, an embodiment of the present invention provides a notebook computer, including the touch PCB of the first aspect.

The utility model provides a touch control PCB (printed circuit board), which comprises a touch control PCB body, an NFC isolation layer positioned on one side of the touch control PCB body, and an NFC wiring layer positioned on one side of the NFC isolation layer opposite to the touch control PCB body; PCB substrates are arranged between the touch PCB body and the NFC isolation layer and between the NFC isolation layer and the NFC wiring layer; the NFC wiring layer is provided with an annular NFC antenna, a clearance area is arranged in an area of the NFC isolation layer corresponding to the NFC antenna, a gap is arranged in the clearance area, and the value range of the gap width is between 2mm and 3mm and comprises end points; the gaps include a first gap extending in a first direction and a second gap extending in a second direction, the first gap intersecting the second gap.

The NFC antenna can be isolated from the touch PCB body by arranging the isolation layer, so that the influence of the NFC antenna on the touch circuit is avoided; and the normal work of NFC antenna can be guaranteed in the clearance that sets up to can guarantee that NFC antenna normal work keeps apart the influence of NFC antenna to the touch-control circuit simultaneously when can be in the same place NFC antenna and touch-control PCB integration.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a touch PCB provided in an embodiment of the utility model;

fig. 2 is a schematic structural diagram of a first specific NFC isolation layer according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second specific NFC isolation layer according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a specific NFC routing layer according to an embodiment of the present invention.

In the figure: 1. the touch PCB comprises a touch PCB body, 11 touch conductive layers, 2 NFC isolation layers, 21 gaps, 211 first gaps, 212 second gaps, 3 NFC routing layers, 31 NFC antennas, 32 via holes, 33 connecting lines, 34 feed points, 35 matching circuits, driving circuits and 4 PCB base materials.

Detailed Description

The core of the utility model is to provide a touch control PCB board. In the prior art, in a notebook computer, an NFC antenna is combined with a touch pad, and a mobile phone with an NFC function touches the touch pad of the notebook computer to trigger connection, so that resources such as data pictures can be conveniently and quickly transmitted.

The touch PCB provided by the utility model comprises a touch PCB body, an NFC isolation layer positioned on one side of the touch PCB body, and an NFC wiring layer positioned on one side of the NFC isolation layer opposite to the touch PCB body; PCB substrates are arranged between the touch PCB body and the NFC isolation layer and between the NFC isolation layer and the NFC wiring layer; the NFC wiring layer is provided with an annular NFC antenna, a clearance area is arranged in an area of the NFC isolation layer corresponding to the NFC antenna, a gap is arranged in the clearance area, and the value range of the gap width is between 2mm and 3mm and comprises end points; the gaps include a first gap extending in a first direction and a second gap extending in a second direction, the first gap intersecting the second gap.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a touch PCB according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a first specific NFC isolation layer according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a second specific NFC isolation layer according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a specific NFC routing layer according to an embodiment of the present invention.

Referring to fig. 1, in the embodiment of the present invention, a touch PCB includes a touch PCB body 1, an NFC isolation layer 2 located on one side of the touch PCB body 1, and an NFC wiring layer 3 located on one side of the NFC isolation layer 2 opposite to the touch PCB body 1; PCB substrates 4 are arranged between the touch PCB body 1 and the NFC isolation layer 2 and between the NFC isolation layer 2 and the NFC wiring layer 3; the NFC wiring layer 3 is provided with an annular NFC antenna 31, a clearance area is arranged in an area, corresponding to the NFC antenna 31, of the NFC isolation layer 2, a gap 21 is arranged in the clearance area, and the value range of the width of the gap 21 is between 2mm and 3mm and comprises end points; the gap 21 includes a first gap 211 extending in a first direction, and a second gap 212 extending in a second direction, and the first gap 211 intersects the second gap 212.

The touch PCB body 1 is a structure generally disposed in a tablet of a notebook computer and having a touch function. Specifically, the touch PCB body 1 generally includes a touch conductive layer 11 disposed opposite to each other, a PCB substrate 4 disposed between the touch conductive layers 11, and a PCB substrate 4 disposed between one touch conductive layer 11 and the NFC isolation layer 2. That is, the touch PCB body 1 generally includes a touch conductive layer 11 disposed opposite to each other, and the touch conductive layer 11 can form a capacitor to implement a touch function. The two touch conductive layers 11 can be isolated from each other by the PCB substrate 4. The specific structure of the touch conductive layer 11 can refer to the prior art, and the specific material of the PCB substrate 4 can be set according to the actual situation, which is not limited herein.

In the embodiment of the present invention, the NFC isolation layer 2 is located on one side of the touch PCB body 1, so the PCB body further includes a PCB substrate 4 located between a touch conductive layer 11 and the NFC isolation layer 2 in a normal condition, and the NFC isolation layer 2 is fixedly connected to the touch PCB body 1 through the PCB substrate 4. For other structures of the touch PCB body 1, for example, a matching circuit, etc., reference may be made to the prior art, and details thereof are not repeated herein.

Most of the area of the NFC isolation layer 2 is usually a whole metal layer to isolate the touch PCB body 1 and the NFC wiring layer 3 from each other. Correspondingly, in this application, the positions of the gaps 21 in the NFC isolation layer 2 are removed, and the rest positions are metal film layers. In the embodiment of the present invention, the NFC isolation layer 2 determines a clearance area corresponding to the area where the NFC antenna 31 is located. Set up clearance 21 in the headroom region of NFC isolation layer 2 to let the intensity signal of predetermineeing of lower intensity can see through NFC isolation layer 2 and let NFC antenna 31 receive, also make NFC antenna 31 can outwards send the intensity signal of predetermineeing of lower intensity. The NFC isolation layer 2 is mainly used to prevent an electromagnetic field generated by the NFC antenna 31 during operation from affecting capacitance values of adjacent touch layers, thereby causing touch failure.

Specifically, in the embodiment of the present invention, the width of the gap 21 ranges from 2mm to 3mm inclusive. The width of the gap 21 is limited to the above range, and since the width is much smaller than the radiation wavelength of the NFC antenna 31, the gap 21 can prevent the NFC signal from being completely shielded; meanwhile, the width of the touch screen is only 2mm-3mm, so that the interference of NFC signals can be effectively shielded, and the normal execution of a touch function is ensured. For example, when the NFC operating frequency is 13.56MHz and the size of the NFC antenna 31 is 40mm × 50mm, the NFC isolation layer 2 can effectively shield the interference of the NFC signal while ensuring the normal use of the NFC function, and ensure the normal execution of the touch function. It should be noted that the shape of the gap 21 is not particularly related to the touch circuit, and is designed mainly according to the shape and area of the NFC antenna 31.

In the embodiment of the present invention, the gap 21 includes a first gap 211 extending along the first direction, and a second gap 212 extending along the second direction, and the first gap 211 intersects the second gap 212. The two gaps 21 need to intersect to ensure that the clearance area is distributed with the gaps 21 as much as possible and to exclude other interferences such as signal interference.

Generally, the gaps 21 need to be uniformly distributed in the clearance area, and the first gap 211 and the second gap 212 need to be generally perpendicular to each other, so as to ensure that the gaps 21 can be distributed in the clearance area as much as possible. The specific structure of the NFC isolation layer 2 and the NFC wiring layer 3 will be described in detail in the following embodiments, and will not be described herein again. In the embodiment of the present invention, the electromagnetic wave generated by the operation of the NFC antenna 31 may interfere with the touch capacitor, but the width of the gap 21 in the clearance area is small, so the interference is also small, and the shape of the gap 21 in the clearance area is specially designed for the normal operation of the NFC antenna 31.

The touch PCB provided by the embodiment of the utility model comprises a touch PCB body 1, an NFC isolation layer 2 positioned on one side of the touch PCB body 1, and an NFC wiring layer 3 positioned on one side of the NFC isolation layer 2, which is opposite to the touch PCB body 1; a PCB substrate 4 is arranged between the touch PCB body 1 and the NFC isolation layer 2, and usually, the PCB substrate 4 can also be arranged between the NFC isolation layer 2 and the NFC wiring layer 3; the NFC wiring layer 3 is provided with an annular NFC antenna 31, a clearance area is arranged in an area, corresponding to the NFC antenna 31, of the NFC isolation layer 2, a gap 21 is arranged in the clearance area, and the value range of the width of the gap 21 is between 2mm and 3mm and comprises an end point value; the gap 21 includes a first gap 211 extending in the first direction, and a second gap 212 extending in the second direction, the first gap 211 intersecting the second gap 212.

The NFC antenna 31 can be isolated from the touch PCB body 1 by arranging the isolation layer, so that the influence of the NFC antenna 31 on a touch circuit is avoided; and the clearance 21 that sets up can guarantee the normal work of NFC antenna 31 to can guarantee that NFC antenna 31 keeps apart the influence of NFC antenna 31 to the touch-control circuit when being in the same place with the integration of touch-control PCB, the normal work of NFC antenna 31.

The detailed structure of the touch PCB provided by the present invention will be described in detail in the following embodiments of the present invention.

Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of a first specific NFC isolation layer according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a second specific NFC isolation layer according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a specific NFC routing layer according to an embodiment of the present invention.

Different from the embodiment of the present invention, the embodiment of the present invention is based on the embodiment of the present invention, and the structure of the further touch PCB board is especially limited for the structure of the NFC isolation layer 2 and the NFC routing layer 3, and other contents have been introduced in detail in the embodiment of the present invention, and are not repeated herein.

Referring to fig. 2 to 4, in the embodiment of the present invention, two specific structures of the NFC isolation layer 2 are specifically provided. Of course, the NFC isolation layer 2 with other structures may also be used in the embodiment of the present invention, and is not limited in this embodiment. In the embodiment of the present invention, when the first gap 211 or the second gap 212 is provided with a plurality of gaps, the plurality of first gaps 211 or the plurality of second gaps 212 are uniformly disposed in the clearance area; when only one of the first gap 211 or the second gap 212 is provided, the first gap 211 or the second gap 212 is centrally provided in the clearance area.

The first method comprises the following steps: referring to fig. 2, the gaps 21 are distributed in a shape of a king. If the horizontally disposed gap 21 is used as the first gap 211 and the vertically disposed gap 21 is used as the second gap 212, only one second gap 212 is provided, so that the second gap 212 is centrally disposed. And three first gaps 211 are provided, the three first gaps 211 are uniformly provided, thereby forming a structure shaped like a Chinese character 'wang'.

Secondly, referring to fig. 3, the gaps 21 are arranged in a zigzag shape. If the horizontally disposed gap 21 is used as the first gap 211 and the vertically disposed gap 21 is used as the second gap 212, the two first gaps 211 are provided, so that the second gaps 212 are uniformly disposed. The second gap 212 is provided with three gaps, wherein one of the gaps is long and two of the gaps are short, the long second gap 212 is arranged in the center, and the short second gaps 212 are arranged in rows and on two sides uniformly, so that a middle-shaped structure is formed.

Referring to fig. 4, in the embodiment of the present invention, the NFC antenna 31 includes a microstrip line annularly distributed around a plurality of turns. The width of the microstrip line is usually about 1mm, but the width of the microstrip line is not particularly limited in the embodiment of the present invention, and is determined according to the specific situation. The microstrip line needs to be wound around a plurality of turns in the horizontal plane to form the NFC antenna 31, and the number of turns around the microstrip line in the embodiment of the present invention ranges from 2 to 4 inclusive. In an embodiment of the present invention, the NFC antenna 31 is formed around 3 turns as shown in fig. 4. The area occupied by the surrounding NFC antenna 31 is generally the same as the clearance area, and may be an area of 40mm × 50 mm. In the embodiment of the present invention, the line distance of the NFC antenna 31, that is, the distance between adjacent microstrip lines, is usually about 0.9mm, and of course, the specific value of the line distance may be set according to the actual situation, and is not limited specifically here.

In the embodiment of the present invention, the leading portion and the tail portion of the microstrip line are both provided with a feeding point 34; two through holes 32 are formed in the PCB substrate 4 between the NFC isolation layer 2 and the NFC wiring layer 3, and the through holes 32 are connected with the feed points 34 in a one-to-one correspondence mode; the via hole 32 is provided with a connecting line 33 towards the end of one side of the NFC isolation layer 2, and the connecting line 33 is located in the gap 21. In the same layer of the PCB, the microstrip line is annularly distributed around a plurality of circles, and the head part and the tail part of the microstrip line are separated from each other, so that a closed loop cannot be formed. In the embodiment of the present invention, two via holes 32 are formed in the PCB substrate 4 between the NFC isolation layer 2 and the NFC wiring layer 3, and the two via holes 32 need to be located in the gap 21 region to avoid being connected to the metal layer for shielding signals in the NFC isolation layer 2. The head and the tail of the microstrip line need to be determined to have a feed point 34, one end of the via hole 32 facing the NFC routing layer 3 needs to be in contact with the corresponding feed point 34 to be electrically connected, and one end of the via hole 32 facing the NFC isolation layer 2 needs to be provided with a connecting line 33 to electrically connect the two via holes 32, so that the whole NFC antenna 31 can form a complete closed loop, and the transceiving function of the NFC antenna 31 is realized. Of course, the connection lines 33 also need to be isolated from the metal layers in the NFC isolation layer 2.

In the embodiment of the present invention, the NFC wiring layer 3 further includes a matching circuit and a driving circuit 35 electrically connected to the NFC antenna 31. The NFC antenna 31 needs to be connected to a matching circuit and a driving circuit 35 to control the NFC antenna 31 through the matching circuit and the driving circuit 35. For specific contents of the matching circuit and the driving circuit 35 configured with the NFC antenna 31, reference may be made to the prior art, and details are not described herein again. It should be noted that, in the embodiment of the present invention, a specific shape of the NFC antenna 31 is not particularly limited, and may be a rectangle, a circle, or another irregular shape, as the case may be.

According to the touch PCB provided by the embodiment of the utility model, the NFC antenna 31 can be isolated from the touch PCB body 1 by arranging the isolation layer, so that the influence of the NFC antenna 31 on a touch circuit is avoided; and the clearance 21 that sets up can guarantee the normal work of NFC antenna 31 to can guarantee that NFC antenna 31 keeps apart the influence of NFC antenna 31 to the touch-control circuit when being in the same place with the integration of touch-control PCB, the normal work of NFC antenna 31.

The utility model also provides a notebook computer, which comprises the touch control PCB provided by any embodiment of the utility model. Other structures of the notebook computer, such as the display and the like, can refer to the prior art in particular, and are not described herein.

The notebook computer provided by the embodiment of the utility model uses the touch PCB, and the NFC antenna 31 is isolated from the touch PCB body 1 by the isolating layer, so that the influence of the NFC antenna 31 on a touch circuit is avoided; and the clearance 21 that sets up can guarantee NFC antenna 31's normal work to can be when being in the same place NFC antenna 31 and touch-control PCB integration, guarantee that NFC antenna 31 normal work keeps apart the influence of NFC antenna 31 to the touch-control circuit simultaneously. Therefore, the touch area of the notebook computer is integrated with the NFC function, and the notebook computer is convenient for users to use.

In the present specification, the embodiments are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts between the embodiments are referred to each other.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description describes a touch PCB provided by the present invention in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A touch PCB is characterized by comprising a touch PCB body, an NFC isolation layer positioned on one side of the touch PCB body, and an NFC wiring layer positioned on one side of the NFC isolation layer opposite to the touch PCB body; PCB substrates are arranged between the touch PCB body and the NFC isolation layer and between the NFC isolation layer and the NFC wiring layer;

the NFC routing layer is provided with an annular NFC antenna, a clearance area is arranged in the region of the NFC isolation layer corresponding to the NFC antenna, a gap is arranged in the clearance area, and the width of the gap is 2mm-3 mm; the gaps include a first gap 211 extending in a first direction, and a second gap 212 extending in a second direction, the first gap intersecting the second gap.

2. The touch PCB of claim 1, wherein the gap is uniformly distributed over the clearance area.

3. The touch PCB of claim 2, wherein the first gap and the second gap are perpendicular to each other.

4. The touch PCB of claim 3, wherein the gaps are distributed in a shape of a king.

5. The touch PCB of claim 3, wherein the gaps are distributed in a zigzag shape.

6. The touch PCB of any one of claims 1-5, wherein the NFC antenna comprises a microstrip line annularly distributed around a plurality of turns.

7. The touch PCB of claim 6, wherein the number of turns of the microstrip line is in a range of 2 to 4 inclusive.

8. The touch PCB of claim 6, wherein the head and tail of the microstrip line are provided with feeding points; two through holes are formed in the PCB substrate between the NFC isolation layer and the NFC routing layer, and the through holes are connected with the feed points in a one-to-one correspondence mode; the via hole orientation NFC isolation layer side end is provided with the connecting wire, the connecting wire is located the clearance.

9. The touch PCB of claim 7, wherein the NFC trace layer further comprises a matching circuit and a driving circuit electrically connected to the NFC antenna.

10. A notebook computer, comprising the touch PCB of any one of claims 1 to 9.