TWI706595B

TWI706595B - Nfc antenna structure and nfc circuit board and wireless charger using the same

Info

Publication number: TWI706595B
Application number: TW108131437A
Authority: TW
Inventors: 劉永清; 高德志; 梁瑞君
Original assignee: 大陸商光寶電子（廣州）有限公司; 光寶科技股份有限公司
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-10-01
Also published as: TW202109971A

Abstract

A Near-Field Communication (NFC) antenna structure includes a NFC antenna and a conductive structure. The NFC antenna extends to form an inner coil and an outer coil. The conductive structure is formed corresponding to a region between the inner coil and the outer coil.

Description

NFC天線結構及應用其之NFC電路板及無線充電座 NFC antenna structure and its NFC circuit board and wireless charging seat

本發明是有關於一種近距離無線通訊天線結構，且特別是有關於一種具有導電結構的近距離無線通訊天線結構。 The present invention relates to a short-range wireless communication antenna structure, and particularly relates to a short-range wireless communication antenna structure with a conductive structure.

習知無線充電座包含數個感應異物的感應線圈及NFC天線。在手機與無線充電座的NFC天線進行通訊時(如配對)，無線充電座的此些感應線圈及充電線圈可能干擾NFC訊號的傳輸，導致手機與無線充電座的NFC天線的配對失敗。因此，如何提出一種新的NFC天線結構以改善前述問題是本技術領域業者努力的方向之一。 The conventional wireless charging stand includes several induction coils and NFC antennas for sensing foreign objects. When the mobile phone communicates with the NFC antenna of the wireless charging cradle (such as pairing), the induction coils and charging coils of the wireless charging cradle may interfere with the transmission of NFC signals, causing the pairing of the mobile phone and the NFC antenna of the wireless charging cradle to fail. Therefore, how to propose a new NFC antenna structure to improve the aforementioned problems is one of the directions of the industry in this technical field.

本發明係有關於一種NFC天線結構，可改善前述習知問題。 The present invention relates to an NFC antenna structure, which can improve the aforementioned conventional problems.

本發明一實施例提出一種NFC天線結構。NFC天線結構包括一NFC天線及一導電結構。NFC天線圍繞出一第一內圈線及一第一外圈線。導電結構對應第一內圈線與第一外圈線之間的區域而形成。 An embodiment of the present invention provides an NFC antenna structure. The NFC antenna structure includes an NFC antenna and a conductive structure. The NFC antenna surrounds a first inner wire and a first outer wire. The conductive structure is formed corresponding to the area between the first inner wire and the first outer wire.

本發明另一實施例提出一種NFC電路板。NFC電路板包括一基板、一第一感應線圈、一第二感應線圈及前述NFC天線結構。NFC天線形成於第一感應線圈與第二感應線圈之間。 Another embodiment of the present invention provides an NFC circuit board. The NFC circuit board includes a substrate, a first induction coil, a second induction coil and the aforementioned NFC antenna structure. The NFC antenna is formed between the first induction coil and the second induction coil.

本發明另一實施例提出一種無線充電座。無線充電座包括一承座、多個充電線圈、一主電路板及前述NFC電路板。 Another embodiment of the present invention provides a wireless charging stand. The wireless charging stand includes a socket, a plurality of charging coils, a main circuit board and the aforementioned NFC circuit board.

為了對本發明之上述及其他方面有更佳的瞭解，下文特舉實施例，並配合所附圖式詳細說明如下： In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows:

10:無線充電座 10: Wireless charging dock

11:承座 11: Seat

12:主電路板 12: Main circuit board

13:充電線圈 13: Charging coil

20:電子裝置 20: Electronic device

100:NFC電路板 100: NFC circuit board

110:基板 110: substrate

110u:第一面 110u: first side

110b:第二面 110b: Second side

111:介電層 111: Dielectric layer

120:第一感應線圈 120: The first induction coil

121:第一線圈 121: first coil

122:第二線圈 122: second coil

130:第二感應線圈 130: second induction coil

131:第三線圈 131: third coil

132:第四線圈 132: fourth coil

140、240:NFC天線 140, 240: NFC antenna

140’、240’、340’、440’、540’:NFC天線結構 140’, 240’, 340’, 440’, 540’: NFC antenna structure

140h:導電孔 140h: conductive hole

141A:第一內圈線 141A: The first inner circle line

141B:第一外圈線 141B: the first outer ring line

142A:第二內圈線 142A: The second inner circle

142B:第二外圈線 142B: The second outer ring line

143A:第三內圈線 143A: Third inner circle line

143B:第三外圈線 143B: Third outer ring line

144A1、144A2:第四內圈線 144A1, 144A2: the fourth inner circle

145A1、145A2:第五內圈線 145A1, 145A2: the fifth inner circle line

146A1、146A2:第六內圈線 146A1, 146A2: sixth inner circle

150、350、450、550:導電結構 150, 350, 450, 550: conductive structure

151A、351A、451A、551A:第一導電部 151A, 351A, 451A, 551A: first conductive part

151B:第一導電線 151B: The first conductive thread

152A、352A、452A、552A:第二導電部 152A, 352A, 452A, 552A: second conductive part

152B:第二導電線 152B: second conductive wire

153:第一連接部 153: The first connection part

153B:第二連接部 153B: The second connecting part

160:屏蔽層 160: shielding layer

170:接點 170: Contact

180:第一保護層 180: first protective layer

190:第二保護層 190: second protective layer

R1:第一連接線 R1: The first connection line

R2:第二連接線 R2: second connecting line

R3:第三連接線 R3: third connection line

R4:第四連接線 R4: Fourth connection line

R5:第五連接線 R5: Fifth connection line

R6:第六連接線 R6: The sixth connecting line

W1、W2、W3、W4:寬度 W1, W2, W3, W4: width

第1圖繪示本發明一實施例之無線充電座與電子裝置的示意圖。 FIG. 1 is a schematic diagram of a wireless charging dock and an electronic device according to an embodiment of the invention.

第2A圖繪示第1圖之NFC電路板的示意圖。 FIG. 2A is a schematic diagram of the NFC circuit board of FIG. 1. FIG.

第2B圖繪示第2A圖之第一感應線圈的示意圖。 FIG. 2B is a schematic diagram of the first induction coil in FIG. 2A.

第2C圖繪示第2A圖之第二感應線圈的示意圖。第3圖繪示第2A圖之NFC電路板沿方向3-3’的剖面圖。 Fig. 2C is a schematic diagram of the second induction coil in Fig. 2A. Fig. 3 shows a cross-sectional view of the NFC circuit board of Fig. 2A along the direction 3-3'.

第4圖繪示第2A圖之NFC電路板沿方向4-4’的剖面圖。 Fig. 4 shows a cross-sectional view of the NFC circuit board in Fig. 2A along the direction 4-4'.

第5圖繪示依照本發明另一實施例之NFC天線結構的示意圖。 FIG. 5 is a schematic diagram of an NFC antenna structure according to another embodiment of the invention.

第6~8圖繪示依照本發明數個實施例之NFC天線結構的示意圖。 Figures 6 to 8 show schematic diagrams of NFC antenna structures according to several embodiments of the invention.

請參照第1~4圖，第1圖繪示本發明一實施例之無線充電座10與電子裝置20的示意圖，第2A圖繪示第1圖之NFC電路板100的示意圖，第2B圖繪示第2A圖之第一感應線圈120的示意圖，第2C圖繪示第2A圖之第二感應線圈130的示意圖，第3圖繪示第2A圖之NFC電路板 100沿方向3-3’的剖面圖，而第4圖繪示第2A圖之NFC電路板100沿方向4-4’的剖面圖。 Please refer to Figures 1 to 4. Figure 1 shows a schematic diagram of a wireless charging stand 10 and an electronic device 20 according to an embodiment of the present invention. Figure 2A shows a schematic diagram of the NFC circuit board 100 in Figure 1, and Figure 2B shows Shows a schematic diagram of the first induction coil 120 in Figure 2A, Figure 2C shows a schematic diagram of the second induction coil 130 in Figure 2A, and Figure 3 shows the NFC circuit board in Figure 2A 100 is a cross-sectional view along the direction 3-3', and FIG. 4 is a cross-sectional view of the NFC circuit board 100 in FIG. 2A along the direction 4-4'.

如第1圖所示，電子裝置20可放置在無線充電座10上，使無線充電座10可對電子裝置20進行充電。無線充電座10包括承座11、主電路板12、數個充電線圈13及NFC電路板100。主電路板12、數個充電線圈13及NFC電路板100配置在承座11中，其中NFC電路板100與數個充電線圈13相對配置。主電路板12電性連接於數個充電線圈13及NFC電路板100。數個充電線圈13可以對位於上方的電子裝置20進行充電，在第1圖中具有4個相互重疊的充電線圈13。此外，電子裝置20例如是手機、平板電腦或其它支援無線充電技術的電子產品。 As shown in Figure 1, the electronic device 20 can be placed on the wireless charging stand 10 so that the wireless charging stand 10 can charge the electronic device 20. The wireless charging stand 10 includes a socket 11, a main circuit board 12, several charging coils 13 and an NFC circuit board 100. The main circuit board 12, several charging coils 13 and the NFC circuit board 100 are arranged in the socket 11, wherein the NFC circuit board 100 is arranged opposite to the several charging coils 13. The main circuit board 12 is electrically connected to the charging coils 13 and the NFC circuit board 100. Several charging coils 13 can charge the electronic device 20 located above. In Figure 1, there are four charging coils 13 overlapping each other. In addition, the electronic device 20 is, for example, a mobile phone, a tablet computer, or other electronic products supporting wireless charging technology.

如第2A~3圖所示，NFC電路板100包括基板110、第一感應線圈120、第二感應線圈130及NFC天線140、導電結構150、屏蔽層160、數個接點170、第一保護層180及第二保護層190，其中NFC天線140及導電結構150構成一NFC天線結構140’。基板110包含多層介電層111，第一感應線圈120、第二感應線圈130、NFC天線140與屏蔽層160被此些介電層111隔開，以適當地電性隔離。NFC電路板100可透過接點170與主電路板12對接，而電性連接於主電路板12。 As shown in Figures 2A to 3, the NFC circuit board 100 includes a substrate 110, a first induction coil 120, a second induction coil 130 and an NFC antenna 140, a conductive structure 150, a shielding layer 160, a number of contacts 170, and a first protection The layer 180 and the second protective layer 190, wherein the NFC antenna 140 and the conductive structure 150 constitute an NFC antenna structure 140'. The substrate 110 includes multiple dielectric layers 111, and the first induction coil 120, the second induction coil 130, the NFC antenna 140, and the shielding layer 160 are separated by the dielectric layers 111 for proper electrical isolation. The NFC circuit board 100 can be connected to the main circuit board 12 through the contact 170 and is electrically connected to the main circuit board 12.

第一感應線圈120及第二感應線圈130可感應位於其上方的物體。當主電路板12可依據第一感應線圈120及第二感應線圈130的訊號，判斷位於無線充電座10上方的物體為電子裝置20或異物(非電子裝置20)。當位於無線充電座10上方的物體為電子裝置20時，無線充電座10才對電子裝置20充電；當位於無線充電座10上方的物體為異物時，無線充電座10不對異物充電。 The first induction coil 120 and the second induction coil 130 can sense objects located above them. When the main circuit board 12 can determine that the object located above the wireless charging base 10 is the electronic device 20 or a foreign object (non-electronic device 20) according to the signals of the first induction coil 120 and the second induction coil 130. When the object located above the wireless charging base 10 is the electronic device 20, the wireless charging base 10 charges the electronic device 20; when the object located above the wireless charging base 10 is a foreign object, the wireless charging base 10 does not charge the foreign object.

如第2A~3圖所示，第一感應線圈120與第二感應線圈130分屬NFC電路板100的不同二層。如圖所示，第一感應線圈120包括第一線圈121及第二線圈122，而第二感應線圈130包括第三線圈131及第四線圈132。第一感應線圈120與第二感應線圈130沿基板110的延伸方向(如X平面的延伸方向)錯開，且第一線圈121與第三線圈131沿基板110的厚度方向(如Z方向)部分重疊，而第二線圈122與第四線圈132沿基板110的厚度方向部分重疊。錯開配置的第一感應線圈120與第二感應線圈130可擴大感應異物的感應範圍。此外，NFC天線140形成於第一感應線圈120與第二感應線圈130之間。 As shown in FIGS. 2A to 3, the first induction coil 120 and the second induction coil 130 belong to two different layers of the NFC circuit board 100. As shown in the figure, the first induction coil 120 includes a first coil 121 and a second coil 122, and the second induction coil 130 includes a third coil 131 and a fourth coil 132. The first induction coil 120 and the second induction coil 130 are staggered along the extension direction of the substrate 110 (such as the extension direction of the X plane), and the first coil 121 and the third coil 131 partially overlap in the thickness direction of the substrate 110 (such as the Z direction) , And the second coil 122 and the fourth coil 132 partially overlap in the thickness direction of the substrate 110. The staggered configuration of the first induction coil 120 and the second induction coil 130 can expand the sensing range of sensing foreign objects. In addition, the NFC antenna 140 is formed between the first induction coil 120 and the second induction coil 130.

如第3圖所示，基板110具有相對之第一面110u與第二面110b，其中第一面110u例如是朝向電子裝置20，而第二面110b例如是朝向主電路板12。第一保護層180覆蓋基板110之第一面110u並覆蓋形成於第一面110u上的元件，如第一感應線圈120。第二保護層190覆蓋基板110之第二面110b並覆蓋形成於第二面110b上的元件，如第二感應線圈130及導電結構150。第一保護層180及第二保護層190例如是NFC電路板100的最外層。 As shown in FIG. 3, the substrate 110 has a first surface 110u and a second surface 110b opposite to each other. The first surface 110u faces the electronic device 20, and the second surface 110b faces the main circuit board 12, for example. The first protective layer 180 covers the first surface 110 u of the substrate 110 and covers the elements formed on the first surface 110 u, such as the first induction coil 120. The second protection layer 190 covers the second surface 110 b of the substrate 110 and covers the elements formed on the second surface 110 b, such as the second induction coil 130 and the conductive structure 150. The first protection layer 180 and the second protection layer 190 are, for example, the outermost layers of the NFC circuit board 100.

如第3圖所示，NFC天線140、導電結構150與屏蔽層160係彼此分隔的三層。例如，NFC天線140、導電結構150與屏蔽層160可透過介電層111彼此分隔。屏蔽層160可以是一梳狀結構，用以屏蔽數個充電線圈13發出的E場電磁輻射，但允許讓H場電磁輻射通過，以對電子裝置20進行充電。導電結構150可以補償NFC天線140的品質因數(Q值)，增加NFC天線140與電子裝置20的配對成功率，避免因為第一感應線圈120及第二感應線圈130、數個充電線圈13及屏蔽層160的干擾，造成NFC天線140的 Q值下降。本文的品質因數係依據NFC天線140之電阻、電感與電容之至少二者而取得。此外，導電結構150的設計可改變NFC天線140的場形(如增強NFC天線140之邊緣的訊號強度)，而擴大NFC天線140的感應範圍(如沿XY平面方向的感應範圍)，同樣有助於增加NFC天線140與電子裝置20的配對成功率。 As shown in FIG. 3, the NFC antenna 140, the conductive structure 150 and the shielding layer 160 are three separate layers. For example, the NFC antenna 140, the conductive structure 150, and the shielding layer 160 may be separated from each other through the dielectric layer 111. The shielding layer 160 may be a comb-shaped structure for shielding the E-field electromagnetic radiation emitted by several charging coils 13 but allowing the H-field electromagnetic radiation to pass through to charge the electronic device 20. The conductive structure 150 can compensate the quality factor (Q value) of the NFC antenna 140, increase the pairing success rate of the NFC antenna 140 and the electronic device 20, and avoid the first induction coil 120 and the second induction coil 130, several charging coils 13 and shielding Layer 160 interference, causing NFC antenna 140 The Q value drops. The quality factor herein is obtained based on at least two of the resistance, inductance, and capacitance of the NFC antenna 140. In addition, the design of the conductive structure 150 can change the field shape of the NFC antenna 140 (such as enhancing the signal strength at the edge of the NFC antenna 140), and expand the sensing range of the NFC antenna 140 (such as the sensing range along the XY plane), which is also helpful To increase the pairing success rate of the NFC antenna 140 and the electronic device 20.

如第2A圖所示，NFC天線140係一條連續導線，其從其中一接點170延伸出一天線圖案後回到另一接點170。如圖所示，NFC天線140圍繞出(或延伸形成)第一內圈線141A及第一外圈線141B，其中第一外圈線141B為NFC天線140之最外圈的一第一部分。導電結構150對應第一內圈線141A與第一外圈線141B之間的區域而形成，此能有效增加NFC天線140的Q值。 As shown in FIG. 2A, the NFC antenna 140 is a continuous wire, which extends from one contact 170 to an antenna pattern and then returns to the other contact 170. As shown in the figure, the NFC antenna 140 surrounds (or extends) a first inner coil 141A and a first outer coil 141B, where the first outer coil 141B is a first part of the outermost circle of the NFC antenna 140. The conductive structure 150 is formed corresponding to the area between the first inner wire 141A and the first outer wire 141B, which can effectively increase the Q value of the NFC antenna 140.

如第2A圖所示，NFC天線140更圍繞出第二內圈線142A及第二外圈線142B，其中第二外圈線142B為NFC天線140最外圈的一第二部分。導電結構150更對應第二內圈線142A與第二外圈線142B之間的區域而形成，此能有效增加NFC天線140的Q值。此外，NFC天線140更圍繞出第一連接線R1及第二連接線R2，其中第一連接線R1連接第一外圈線141B與第二內圈線142A，而第二連接線R2連接第一內圈線141A與第二外圈線142B。導電結構150與第一連接線R1及第二連接線R2係部分上下重疊。例如，導電結構150之第一導電線151B沿Z方向重疊於第一連接線R1與第二連接線R2的交叉處，然本發明實施例不受此限。在本實施例中，第一連接線R1與第二連接線R2係交叉配置，然在另一實施例中，第一連接線R1與第二連接線R2可大致上平行配置(如第5圖所示)。 As shown in FIG. 2A, the NFC antenna 140 further surrounds the second inner loop 142A and the second outer loop 142B, where the second outer loop 142B is a second part of the outermost loop of the NFC antenna 140. The conductive structure 150 is further formed corresponding to the area between the second inner wire 142A and the second outer wire 142B, which can effectively increase the Q value of the NFC antenna 140. In addition, the NFC antenna 140 further surrounds the first connecting wire R1 and the second connecting wire R2. The first connecting wire R1 connects the first outer wire 141B and the second inner wire 142A, and the second connecting wire R2 connects to the first The inner wire 141A and the second outer wire 142B. The conductive structure 150 partially overlaps the first connection line R1 and the second connection line R2 up and down. For example, the first conductive line 151B of the conductive structure 150 overlaps the intersection of the first connection line R1 and the second connection line R2 along the Z direction, but the embodiment of the present invention is not limited thereto. In this embodiment, the first connection line R1 and the second connection line R2 are arranged in a cross, but in another embodiment, the first connection line R1 and the second connection line R2 can be arranged substantially in parallel (as shown in Figure 5 Shown).

如第2A圖所示，NFC天線140圍繞出第三內圈線143A及第三外圈線143B，其中第三外圈線143B為NFC天線140最外圈的一第三部分，其中第三部分與前述第一部分(或第二部分)為NFC天線140之最外圈的相對二部分。導電結構150更對應第三內圈線143A與第三外圈線143B之間的區域而形成，此能有效增加NFC天線140的Q值。 As shown in Figure 2A, the NFC antenna 140 surrounds the third inner coil 143A and the third outer coil 143B, where the third outer coil 143B is a third part of the outermost circle of the NFC antenna 140, and the third part The first part (or the second part) is the two opposite parts of the outermost circle of the NFC antenna 140. The conductive structure 150 is further formed corresponding to the area between the third inner wire 143A and the third outer wire 143B, which can effectively increase the Q value of the NFC antenna 140.

此外，如第2A圖所示，NFC天線140更圍繞出第四內圈線144A1及144A2、第五內圈線145A1及145A2及第六內圈線146A1及146A2。第四內圈線(144A及144A2)位於第五內圈線(145A1及145A2)與第一內圈線141A(或第二內圈線142A)之間。第三內圈線143A位於第六內圈線(146A1及146A2)與第三外圈線143B之間。第五內圈線145A1、145A2及第六內圈線146A1、146A2為NFC天線140之最內圈的部分。此外，NFC天線140更包括第三連接線R3、第四連接線R4、第五連接線R5及第六連接線R6。如第2A圖所示，第三連接線R3與第四連接線R4係交叉配置，其中第三連接線R3連接第四內圈線144A1與第五內圈線145A2，而第四連接線R4連接第四內圈線144A2與第五內圈線145A1。如第2A圖所示，第五連接線R5與第六連接線R6係交叉配置，其中第五連接線R5連接第三內圈線143A與第六內圈線146A2，而第六連接線R6連接第三內圈線143A與第六內圈線146A1。 In addition, as shown in FIG. 2A, the NFC antenna 140 further surrounds the fourth inner loop wires 144A1 and 144A2, the fifth inner loop wires 145A1 and 145A2, and the sixth inner loop wires 146A1 and 146A2. The fourth inner circle line (144A and 144A2) is located between the fifth inner circle line (145A1 and 145A2) and the first inner circle line 141A (or the second inner circle line 142A). The third inner ring line 143A is located between the sixth inner ring line (146A1 and 146A2) and the third outer ring line 143B. The fifth inner coil wires 145A1, 145A2 and the sixth inner coil wires 146A1, 146A2 are the innermost portions of the NFC antenna 140. In addition, the NFC antenna 140 further includes a third connection line R3, a fourth connection line R4, a fifth connection line R5, and a sixth connection line R6. As shown in Figure 2A, the third connecting line R3 and the fourth connecting line R4 are cross-arranged, wherein the third connecting line R3 connects the fourth inner ring line 144A1 and the fifth inner ring line 145A2, and the fourth connecting line R4 connects The fourth inner ring line 144A2 and the fifth inner ring line 145A1. As shown in Figure 2A, the fifth connecting line R5 and the sixth connecting line R6 are cross-arranged, wherein the fifth connecting line R5 connects the third inner ring line 143A with the sixth inner ring line 146A2, and the sixth connecting line R6 connects The third inner ring line 143A and the sixth inner ring line 146A1.

如第2A圖所示，導電結構150包括數個第一導電部151A及數條第一導電線151B，各第一導電部151A的寬度W1大於各第一導電線151B的寬度W2，各第一導電部151A的面積大於各第一導電線151B的面積，此些第一導電部151A之二者以對應之第一導電線151B連接。本發明實施例不限制第一導電部151A和第一導電線151B的寬度或面積的比例。 As shown in FIG. 2A, the conductive structure 150 includes a plurality of first conductive portions 151A and a plurality of first conductive wires 151B. The width W1 of each first conductive portion 151A is greater than the width W2 of each first conductive wire 151B. The area of the conductive portion 151A is larger than The area of each first conductive line 151B, and two of the first conductive portions 151A are connected by the corresponding first conductive line 151B. The embodiment of the present invention does not limit the ratio of the width or area of the first conductive portion 151A and the first conductive line 151B.

如第2A圖所示，導電結構150包括數個第二導電部152A及數條第二導電線152B，各第二導電部152A的寬度W3大於各第二導電線152B的寬度W4，各第二導電部152A的面積大於各第二導電線152B的面積，此些第二導電部152A之二者之間以對應之第二導電線152B連接。本發明實施例不限制第二導電部152A和第二導電線152B的寬度或面積的比例。在一實施例中，第二導電部152A的形狀及/或尺寸可同於第一導電部151A，而第二導電線152B的形狀及/或尺寸可同於第一導電線151B，然本發明實施例不受此限。 As shown in FIG. 2A, the conductive structure 150 includes a plurality of second conductive portions 152A and a plurality of second conductive lines 152B. The width W3 of each second conductive portion 152A is greater than the width W4 of each second conductive line 152B. The area of the conductive portion 152A is larger than the area of each second conductive wire 152B, and the two second conductive portions 152A are connected by a corresponding second conductive wire 152B. The embodiment of the present invention does not limit the ratio of the width or area of the second conductive portion 152A and the second conductive line 152B. In an embodiment, the shape and/or size of the second conductive portion 152A may be the same as that of the first conductive portion 151A, and the shape and/or size of the second conductive wire 152B may be the same as that of the first conductive wire 151B, but the present invention The embodiment is not limited by this.

如第2A圖所示，由於第一導電部151A及第一導電線151B鄰近或位於NFC天線140的第一最外側，而第二導電部152A及第二導電線152B鄰近或位於NFC天線140的第二最外側，可補償NFC天線140邊緣區域的訊號強度，擴大NFC天線140的感應範圍。 As shown in Figure 2A, since the first conductive portion 151A and the first conductive wire 151B are adjacent to or located on the first outermost side of the NFC antenna 140, and the second conductive portion 152A and the second conductive wire 152B are adjacent to or located on the NFC antenna 140 The second outermost side can compensate the signal strength of the edge area of the NFC antenna 140 and expand the sensing range of the NFC antenna 140.

如第2A圖的右側所示，導電結構150更包括至少一第一連接部153。第一連接部153與鄰近之第一導電部151A以對應之第一導電線151B連接。第一連接部153的長軸延伸方向與此些第一導電部151的排列方向實質上垂直。例如，此些第一導電部151A大致上沿Y方向排列，而第一連接部153大致上沿X方向延伸，然本發明實施例不受此限。相似地，如第2A圖的左側所示，第一連接部153與鄰近之第二導電部152A以對應之第二導電線 152B連接。第一連接部153的長軸延伸方向與此些第二導電部152A的排列方向實質上垂直。例如，此些第二導電部152A大致上沿Y方向排列，而第一連接部153大致上沿X方向延伸，然本發明實施例不受此限。 As shown on the right side of FIG. 2A, the conductive structure 150 further includes at least one first connecting portion 153. The first connecting portion 153 is connected to the adjacent first conductive portion 151A by a corresponding first conductive wire 151B. The extending direction of the long axis of the first connecting portion 153 is substantially perpendicular to the arrangement direction of the first conductive portions 151. For example, the first conductive portions 151A are arranged substantially along the Y direction, and the first connecting portions 153 substantially extend along the X direction, but the embodiment of the present invention is not limited thereto. Similarly, as shown on the left side of Figure 2A, the first connecting portion 153 and the adjacent second conductive portion 152A correspond to the second conductive line 152B connection. The extending direction of the long axis of the first connecting portion 153 is substantially perpendicular to the arrangement direction of the second conductive portions 152A. For example, the second conductive portions 152A are arranged substantially along the Y direction, and the first connecting portion 153 substantially extends along the X direction, but the embodiment of the present invention is not limited thereto.

如第2A圖所示，導電結構150之導電部(第一導電部151A及第二導電部152A)及導電線(第一導電線151B及第二導電線152B)與感應線圈(第一感應線圈120及第二感應線圈130)沿XY平面係完全錯開，即導電結構150之導電部及導電線與感應線圈沿Z方向完全不重疊，如此可避免導電結構150被第一感應線圈120及第二感應線圈130誤判成異物。 As shown in Figure 2A, the conductive portion (first conductive portion 151A and second conductive portion 152A) and conductive wires (first conductive wire 151B and second conductive wire 152B) of the conductive structure 150 and the induction coil (first induction coil) 120 and the second induction coil 130) are completely staggered along the XY plane, that is, the conductive portion and the conductive line of the conductive structure 150 do not overlap with the induction coil along the Z direction at all, so that the conductive structure 150 can be prevented from being affected by the first induction coil 120 and the second induction coil 120 The induction coil 130 is misjudged as a foreign object.

如第2A~2C圖及第4圖所示，NFC天線結構140’更包括至少一導電孔140h及第二連接部153B。導電孔140h形成於導電結構150與屏蔽層160之間且連接導電結構150與屏蔽層160。詳言之，第二連接部153B連接第一連接部153，並透過至少一導電孔140h連接於屏蔽層160，使與第一連接部153連接之第二導電部152A得以透過第一連接部153、第二連接部153B及導電孔140h電性連接屏蔽層160。屏蔽層160可透過其它導電孔電性連接於一接地的接點170。如此，導電結構150可透過導電孔140h及屏蔽層160電性連接於接地電位。第一導電部151A也可採用類似方式電性連接於接地電位。然本發明實施例不限定導電結構150的接地方式。在另一實施例中，導電結構150之第一連接部151A及/或第二導電部152A可於同一層延伸至接地之接點170。 As shown in Figures 2A-2C and Figure 4, the NFC antenna structure 140' further includes at least one conductive hole 140h and a second connecting portion 153B. The conductive hole 140h is formed between the conductive structure 150 and the shielding layer 160 and connects the conductive structure 150 and the shielding layer 160. In detail, the second connecting portion 153B is connected to the first connecting portion 153, and is connected to the shielding layer 160 through at least one conductive hole 140h, so that the second conductive portion 152A connected to the first connecting portion 153 can pass through the first connecting portion 153 , The second connecting portion 153B and the conductive hole 140h are electrically connected to the shielding layer 160. The shielding layer 160 can be electrically connected to a ground contact 170 through other conductive holes. In this way, the conductive structure 150 can be electrically connected to the ground potential through the conductive hole 140h and the shielding layer 160. The first conductive portion 151A can also be electrically connected to the ground potential in a similar manner. However, the embodiment of the present invention does not limit the grounding method of the conductive structure 150. In another embodiment, the first connecting portion 151A and/or the second conductive portion 152A of the conductive structure 150 can extend to the ground contact 170 on the same layer.

請參照第5圖，其繪示依照本發明另一實施例之NFC天線結構240’的示意圖。第2A圖之NFC電路板100的NFC天線結構 140’可以以NFC天線結構240’取代。NFC天線結構240’包括NFC天線240及導電結構150。本實施例之NFC天線240具有類似或同於前述NFC天線140的結構，不同處在於，NFC天線240之第三連接線R3與第四連接線R4大致上平行配置，而NFC天線240之第五連接線R5與第六連接線R6大致上平行配置。 Please refer to FIG. 5, which shows a schematic diagram of an NFC antenna structure 240' according to another embodiment of the present invention. The NFC antenna structure of the NFC circuit board 100 in Figure 2A 140' can be replaced by an NFC antenna structure 240'. The NFC antenna structure 240' includes an NFC antenna 240 and a conductive structure 150. The NFC antenna 240 of this embodiment has a structure similar to or the same as the aforementioned NFC antenna 140. The difference is that the third connection line R3 and the fourth connection line R4 of the NFC antenna 240 are arranged substantially in parallel, while the fifth connection line R4 of the NFC antenna 240 The connection line R5 and the sixth connection line R6 are arranged substantially in parallel.

雖然上述實施例之第一導電部151A及第二導電部152A係以多邊形，如矩形或長條形為例說明，然本發明實施例不受此限。請參照第6~8圖，其繪示依照本發明數個實施例之NFC天線結構340’~540’的示意圖。NFC天線結構340’~540’之任一者可取代第2A圖之NFC天線結構140’。 Although the first conductive portion 151A and the second conductive portion 152A of the above-mentioned embodiment are illustrated by taking a polygonal shape, such as a rectangle or a strip shape, as an example, the embodiment of the present invention is not limited thereto. Please refer to FIGS. 6-8, which show schematic diagrams of NFC antenna structures 340'-540' according to several embodiments of the present invention. Any one of the NFC antenna structures 340' to 540' can replace the NFC antenna structure 140' of FIG. 2A.

如第6圖所示，NFC天線結構340’包括NFC天線140及導電結構350。導電結構350包括數個第一導電部351A、數條第一導電線151B，數個第二導電部352A及數條第二導電線152B。本實施例之第一導電部351A、第一導電線151B，第二導電部352A及第二導電線152B分別類似前述第一導電部151A、第一導電線151B，第二導電部152A及第二導電線152B，不同處在於，第一導電部351A及第二導電部352A的形狀為圓形。 As shown in Figure 6, the NFC antenna structure 340' includes an NFC antenna 140 and a conductive structure 350. The conductive structure 350 includes a plurality of first conductive portions 351A, a plurality of first conductive wires 151B, a plurality of second conductive portions 352A, and a plurality of second conductive wires 152B. The first conductive portion 351A, the first conductive wire 151B, the second conductive portion 352A, and the second conductive wire 152B of this embodiment are respectively similar to the aforementioned first conductive portion 151A, the first conductive wire 151B, the second conductive portion 152A, and the second conductive wire 152A. The conductive wire 152B is different in that the shapes of the first conductive portion 351A and the second conductive portion 352A are circular.

如第7圖所示，NFC天線結構440’包括NFC天線140及導電結構450。導電結構450包括數個第一導電部451A、數條第一導電線151B，數個第二導電部452A及數條第二導電線152B。本實施例之第一導電部451A、第一導電線151B，第二導電部452A及第二導電線152B分別類似前述第一導電部151A、第一導電線151B，第二導電部152A及第二導電線152B，不同處在於，第一導電部451A及第二導電部452A的形狀為稜形。 As shown in Figure 7, the NFC antenna structure 440' includes an NFC antenna 140 and a conductive structure 450. The conductive structure 450 includes a plurality of first conductive portions 451A, a plurality of first conductive wires 151B, a plurality of second conductive portions 452A, and a plurality of second conductive wires 152B. The first conductive portion 451A, the first conductive wire 151B, the second conductive portion 452A, and the second conductive wire 152B of this embodiment are similar to the aforementioned first conductive portion 151A, the first conductive wire 151B, the second conductive portion 152A, and the second conductive wire, respectively. The conductive wire 152B is different in that the shapes of the first conductive portion 451A and the second conductive portion 452A are prismatic.

如第8圖所示，NFC天線結構540’包括NFC天線140及導電結構550。導電結構550包括數個第一導電部551A、數條第一導電線151B，數個第二導電部552A及數條第二導電線152B。本實施例之第一導電部551A、第一導電線151B，第二導電部552A及第二導電線152B分別類似前述第一導電部151A、第一導電線151B，第二導電部152A及第二導電線152B，不同處在於，第一導電部551A及第二導電部552A的形狀為交叉形。 As shown in Figure 8, the NFC antenna structure 540' includes an NFC antenna 140 and a conductive structure 550. The conductive structure 550 includes a plurality of first conductive portions 551A, a plurality of first conductive wires 151B, a plurality of second conductive portions 552A, and a plurality of second conductive wires 152B. The first conductive portion 551A, the first conductive wire 151B, the second conductive portion 552A, and the second conductive wire 152B of this embodiment are similar to the aforementioned first conductive portion 151A, the first conductive wire 151B, the second conductive portion 152A, and the second conductive wire, respectively. The conductive line 152B is different in that the shape of the first conductive portion 551A and the second conductive portion 552A is a cross shape.

綜上，導電結構之第一導電部及/或第二導電部可以是各種形狀，如圓形、多邊形(如矩形、正方形、三角形等)、橢圓形或交叉形等。此外，導電結構之各第一導電部的形狀可相同、各第二導電部的形狀可相同，或各第一導電部的形狀與各第二導電部的形狀可相同。或者，導電結構之數個第一導電部的形狀可相異、導電結構之數個第二導電部的形狀可相異，或一個或一些第一導電部的形狀與一個或一些第二導電部的形狀可相異。本發明實施例不限定第一導電部或第二導電部的形狀、大小及數量，只要有助於增加NFC天線與電子裝置的配對成功率及/或正面地改變NFC天線之場形即可。 In summary, the first conductive portion and/or the second conductive portion of the conductive structure can have various shapes, such as a circle, a polygon (such as a rectangle, a square, a triangle, etc.), an ellipse, or a cross shape. In addition, the shape of each first conductive portion of the conductive structure may be the same, the shape of each second conductive portion may be the same, or the shape of each first conductive portion and the shape of each second conductive portion may be the same. Alternatively, the shapes of the plurality of first conductive portions of the conductive structure may be different, the shapes of the plurality of second conductive portions of the conductive structure may be different, or the shape of one or some of the first conductive portions is different from the shape of one or some of the second conductive portions The shapes can be different. The embodiment of the present invention does not limit the shape, size, and quantity of the first conductive portion or the second conductive portion, as long as it helps increase the pairing success rate of the NFC antenna and the electronic device and/or positively change the field shape of the NFC antenna.

本發明實施例之NFC天線結構由於具有導電結構，能有效增加NFC天線的品質因數且能擴大NFC天線的感應範圍。依據軟體模擬結果，相較於稜形、長方形及交叉形，當第一導電部及/或第二導電部為圓形時，NFC天線的品質因數相對較佳且更能有效擴大NFC天線的感應範圍(減少感應盲區)。 Since the NFC antenna structure of the embodiment of the present invention has a conductive structure, it can effectively increase the quality factor of the NFC antenna and expand the sensing range of the NFC antenna. According to the software simulation results, when the first conductive part and/or the second conductive part are circular, the quality factor of the NFC antenna is relatively better and the NFC antenna can be more effectively expanded than the prismatic, rectangular and cross-shaped. Range (reduce the dead zone of induction).

綜上，本發明實施例之NFC天線結構包括NFC天線及導電結構，其中導電結構對應NFC天線之內圈線與外圈線之間的區域而形成，如此可補償NFC天線的品質因數(Q值)，增加NFC天線與電子裝置的配對成功率。在一實施例中，導電結構的位置對應NFC天線之最外圈之區域(或鄰近基板之外邊界側面配置)，因此導電結構可增強NFC天線之邊緣的訊號強度(改變NFC天線的場形，而擴大NFC天線的感應範圍(減少感應盲區)，此也有助於增加NFC天線與電子裝置的配對成功率。 In summary, the NFC antenna structure of the embodiment of the present invention includes an NFC antenna and a conductive structure, wherein the conductive structure corresponds to the distance between the inner coil and the outer coil of the NFC antenna In this way, the quality factor (Q value) of the NFC antenna can be compensated, and the pairing success rate of the NFC antenna and the electronic device can be increased. In one embodiment, the position of the conductive structure corresponds to the area of the outermost circle of the NFC antenna (or the side adjacent to the outer boundary of the substrate), so the conductive structure can enhance the signal strength at the edge of the NFC antenna (change the field shape of the NFC antenna, Enlarging the sensing range of the NFC antenna (reducing the sensing blind zone) also helps increase the success rate of pairing between the NFC antenna and the electronic device.

綜上所述，雖然本發明已以實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。 In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to those defined by the attached patent application scope.

100:NFC電路板 100: NFC circuit board

110:基板 110: substrate

120:第一感應線圈 120: The first induction coil

121:第一線圈 121: first coil

122:第二線圈 122: second coil

130:第二感應線圈 130: second induction coil

131:第三線圈 131: third coil

132:第四線圈 132: fourth coil

140:NFC天線 140: NFC antenna

141A:第一內圈線 141A: The first inner circle line

141B:第一外圈線 141B: the first outer ring line

142A:第二內圈線 142A: The second inner circle

142B:第二外圈線 142B: The second outer ring line

143A:第三內圈線 143A: Third inner circle line

143B:第三外圈線 143B: Third outer ring line

144A1、144A2:第四內圈線 144A1, 144A2: the fourth inner circle

145A1、145A2:第五內圈線 145A1, 145A2: the fifth inner circle line

146A1、146A2:第六內圈線 146A1, 146A2: sixth inner circle

151A:第一導電部 151A: first conductive part

151B:第一導電線 151B: The first conductive thread

152A:第二導電部 152A: second conductive part

152B:第二導電線 152B: second conductive wire

153:第一連接部 153: The first connection part

160:屏蔽層 160: shielding layer

170:接點 170: Contact

R1:第一連接線 R1: The first connection line

R2:第二連接線 R2: second connecting line

R3:第三連接線 R3: third connection line

R4:第四連接線 R4: Fourth connection line

R5:第五連接線 R5: Fifth connection line

R6:第六連接線 R6: The sixth connecting line

W1、W2、W3、W4:寬度 W1, W2, W3, W4: width

Claims

一種近距離無線通訊(Near-Field Communication,NFC)天線結構，包括：一NFC天線，圍繞出一第一內圈線及一第一外圈線；以及一導電結構，對應該第一內圈線與該第一外圈線之間的區域而形成，其中該導電結構接地。 A Near-Field Communication (NFC) antenna structure, including: an NFC antenna surrounding a first inner wire and a first outer wire; and a conductive structure corresponding to the first inner wire The conductive structure is grounded.

如申請專利範圍第1項所述之NFC天線結構，其中該NFC天線與該導電結構係彼此分隔的二層。 In the NFC antenna structure described in item 1 of the scope of patent application, the NFC antenna and the conductive structure are separated from each other in two layers.

如申請專利範圍第1項所述之NFC天線結構，其中該導電結構包括複數個第一導電部及複數條第一導電線，該些第一導電部之二者以對應之該第一導電線連接；該些第一導電部及該些第一導電線對應該第一內圈線與該第一外圈線之間的區域而形成。 The NFC antenna structure described in the first item of the scope of patent application, wherein the conductive structure includes a plurality of first conductive portions and a plurality of first conductive wires, and two of the first conductive portions correspond to the first conductive wires Connection; The first conductive portions and the first conductive wires are formed corresponding to the area between the first inner wire and the first outer wire.

如申請專利範圍第3項所述之NFC天線結構，其中各該第一導電部的寬度大於各該第一導電線的寬度。 According to the NFC antenna structure described in item 3 of the scope of patent application, the width of each of the first conductive portions is greater than the width of each of the first conductive lines.

如申請專利範圍第3項所述之NFC天線結構，其中該NFC天線圍繞出一第二內圈線及一第二外圈線，該NFC天線更包括一第一連接線及一第二連接線，該第一連接線連接該第一外圈線與該第二內圈線，該第二連接線連接該第一內圈線與該第二外圈線；該導電結構更對應該第二內圈線與該第二外圈線之間的區域而形成且與該第一連接線及該第二連接線部分上下重疊。 The NFC antenna structure described in item 3 of the scope of patent application, wherein the NFC antenna surrounds a second inner wire and a second outer wire, and the NFC antenna further includes a first connecting wire and a second connecting wire , The first connecting wire connects the first outer wire and the second inner wire, the second connecting wire connects the first inner wire and the second outer wire; the conductive structure corresponds to the second inner wire The area between the loop line and the second outer loop line is formed and partially overlaps the first connecting line and the second connecting line.

如申請專利範圍第5項所述之NFC天線結構，其中該第一連接線與該第二連接線係交叉或平行設置。 According to the NFC antenna structure described in item 5 of the scope of patent application, the first connection line and the second connection line are arranged in a cross or parallel arrangement.

如申請專利範圍第3項所述之NFC天線結構，其中該導電結構更包括一第一連接部，該第一連接部與鄰近之該第一導電部以對應之該第一導電線連接；該第一連接部的長軸延伸方向與該些第一導電部的排列方向實質上垂直。 The NFC antenna structure described in item 3 of the scope of patent application, wherein the conductive structure further includes a first connecting portion, and the first connecting portion is connected to the adjacent first conductive portion by the corresponding first conductive wire; the The extending direction of the long axis of the first connecting portion is substantially perpendicular to the arrangement direction of the first conductive portions.

如申請專利範圍第3項所述之NFC天線結構，其中各該第一導電部為圓形、多邊形或交叉形。 According to the NFC antenna structure described in item 3 of the scope of patent application, each of the first conductive portions is circular, polygonal or cross-shaped.

如申請專利範圍第1項所述之NFC天線結構，其中該NFC天線更圍繞出一第三內圈線及一第三外圈線，該第三外圈線與該第一外圈線分別為該NFC天線之最外圈的相對二部分；該導電結構更對應該第三內圈線與該第三外圈線之間的區域而形成。 For the NFC antenna structure described in item 1 of the scope of the patent application, the NFC antenna further surrounds a third inner loop wire and a third outer loop wire, and the third outer loop wire and the first outer loop wire are respectively The two opposite parts of the outermost circle of the NFC antenna; the conductive structure is formed corresponding to the area between the third inner circle wire and the third outer circle wire.

如申請專利範圍第9項所述之NFC天線結構，其中該導電結構包括複數個第二導電部及複數條第二導電線，該些第二導電部之二者之間以對應之該第二導電線連接；該些第二導電部及該些第二導電線對應該第三內圈線與該第三外圈線之間的區域而形成。 According to the NFC antenna structure described in claim 9, wherein the conductive structure includes a plurality of second conductive parts and a plurality of second conductive wires, and the second conductive parts correspond to the second The conductive wires are connected; the second conductive portions and the second conductive wires are formed corresponding to the area between the third inner wire and the third outer wire.

如申請專利範圍第10項所述之NFC天線結構，其中各該第二導電部的寬度大於各該第二導電線的寬度。 According to the NFC antenna structure described in claim 10, the width of each second conductive portion is greater than the width of each second conductive line.

如申請專利範圍第1項所述之NFC天線結構，更包括：一導電孔，形成於該導電結構與一屏蔽層之間且連接該導電結構與該屏蔽層。 The NFC antenna structure described in item 1 of the scope of the patent application further includes: a conductive hole formed between the conductive structure and a shielding layer and connecting the conductive structure and the shielding layer.

如申請專利範圍第12項所述之NFC天線結構，其中該NFC天線、該導電結構與該屏蔽層係彼此分隔的三層。 According to the NFC antenna structure described in item 12 of the scope of the patent application, the NFC antenna, the conductive structure and the shielding layer are three separate layers.

一種NFC電路板，包括：一基板，具有相對之一第一面與一第二面；一第一感應線圈，形成於該第一面；一第二感應線圈，形成於該第二面；以及一如申請專利範圍第1~13項之任一項所述之NFC天線結構NFC天線結構，其中該NFC天線形成於該第一感應線圈與該第二感應線圈之間。 An NFC circuit board includes: a substrate having a first surface and a second surface opposite to each other; a first induction coil formed on the first surface; a second induction coil formed on the second surface; and An NFC antenna structure as described in any one of items 1 to 13 in the scope of the patent application, wherein the NFC antenna is formed between the first induction coil and the second induction coil.

一種無線充電座，包括：一如申請專利範圍第14項所述之NFC電路板；多個充電線圈，用以對放置於該無線充電座上的一電子裝置充電；一主電路板，電性連接於該多個充電線圈及該NFC電路板；以及一承座，用以容置該主電路板、該多個充電線圈以及該NFC電路板。 A wireless charging base includes: an NFC circuit board as described in item 14 of the scope of patent application; a plurality of charging coils for charging an electronic device placed on the wireless charging base; and a main circuit board with electrical properties Connected to the charging coils and the NFC circuit board; and a socket for accommodating the main circuit board, the charging coils and the NFC circuit board.

一種NFC電路板，包括：一基板，具有相對之一第一面與一第二面，分別具有一第一感應線圈與一第二感應線圈；一NFC天線，圍繞出一第一內圈線及一第一外圈線；一導電結構，對應該第一內圈線與該第一外圈線之間的區域而形成；一屏蔽層，位於該些感應線圈與該NFC天線之間；以及其中，該導電結構與該屏蔽層電性連接。 An NFC circuit board includes: a substrate with a first surface and a second surface opposite to each other, respectively having a first induction coil and a second induction coil; an NFC antenna surrounding a first inner coil and A first outer coil wire; a conductive structure formed corresponding to the area between the first inner coil wire and the first outer coil wire; a shielding layer located between the induction coils and the NFC antenna; and wherein , The conductive structure is electrically connected to the shielding layer.

如申請專利範圍第16項所述之NFC電路板，其中該屏蔽層接地。 For the NFC circuit board described in item 16 of the scope of patent application, the shielding layer is grounded.

如申請專利範圍第16項所述之NFC電路板，其中該NFC天線與該導電結構係彼此分隔的二層。 The NFC circuit board described in the 16th patent application, wherein the NFC antenna and the conductive structure are separated from each other in two layers.

如申請專利範圍第16項所述之NFC電路板，其中該NFC天線、該導電結構與該屏蔽層係彼此分隔的三層。 According to the NFC circuit board described in item 16 of the scope of patent application, the NFC antenna, the conductive structure and the shielding layer are three separate layers.

如申請專利範圍第16項所述之NFC電路板，其中該導電結構包括複數個第一導電部及複數條第一導電線，該些第一導電部之二者以對應之該第一導電線連接；該些第一導電部及該些第一導電線對應該第一內圈線與該第一外圈線之間的區域而形成。 The NFC circuit board described in item 16 of the scope of patent application, wherein the conductive structure includes a plurality of first conductive portions and a plurality of first conductive wires, and two of the first conductive portions correspond to the first conductive wires Connection; The first conductive portions and the first conductive wires are formed corresponding to the area between the first inner wire and the first outer wire.

如申請專利範圍第20項所述之NFC電路板，其中各該第一導電部的寬度大於各該第一導電線的寬度。 According to the NFC circuit board described in claim 20, the width of each of the first conductive portions is greater than the width of each of the first conductive lines.