TWM594192U

TWM594192U - Single-layer projected capacitive touch sensor with dual bridge areas

Info

Publication number: TWM594192U
Application number: TW108205918U
Authority: TW
Inventors: 白志強; 林孟癸; 林青峰; 陳秋雯
Original assignee: 洋華光電股份有限公司
Priority date: 2019-05-11
Filing date: 2019-05-11
Publication date: 2020-04-21

Abstract

一種具雙橋接區的單層投射電容式觸控感應器，其觸控感應器具有獨立矩陣感測單元架構，在該觸控感應器上包含複數感應陣列，每一感應陣列具一共用感應電極及複數驅動電極，而數量繁多的該等驅動電極被劃分成二群組並分別通過電極連線而連接至二個設置在邊緣部位的橋接區內的電接點，在各橋接區分別覆設一絕緣膜，在該絕緣膜上與電該等接點的相應位置開設貫穿孔，藉由驅動電極信號導線通過該等貫穿孔將該觸控感應器上各個感應陣列的位於同一軸線位置上的驅動電極電接點彼此電性連接以串聯形成一信號通道，以及，電性連接該等共用感應電極的信號導線穿越通過前述二個橋接區的其中之一，並與前述用以串聯形成一信號通道的各條驅動電極信號導線呈絕緣交叉設置，而該等共用感應電極還設有電極延伸部，該電極延伸部被延伸設置於另一個橋接區中，並與前述用以串聯形成一信號通道的各條驅動電極信號導線呈絕緣交叉設置。A single-layer projected capacitive touch sensor with dual bridge areas, the touch sensor has an independent matrix sensing unit architecture, the touch sensor includes a plurality of sensing arrays, each sensing array has a common sensing electrode And a plurality of driving electrodes, and a large number of these driving electrodes are divided into two groups and are respectively connected to two electrical contacts provided in the bridging area of the edge portion by electrode wires, and covered in each bridging area An insulating film, a through hole is formed on the insulating film and the corresponding position of the contacts, and each sensing array on the touch sensor is located on the same axis position by driving the electrode signal wire through the through holes The electrical contacts of the driving electrodes are electrically connected to each other to form a signal channel in series, and a signal wire electrically connected to the common sensing electrodes passes through one of the two bridge regions and forms a signal in series with the foregoing The signal wires of the driving electrodes of the channel are insulated and crossed, and the common sensing electrodes are also provided with an electrode extension, which is extended in another bridge area and forms a signal channel in series with the aforementioned The signal wires of each driving electrode are arranged in an insulated cross.

Description

具雙橋接區的單層投射電容式觸控感應器Single-layer projected capacitive touch sensor with dual bridge areas

本創作涉及投射電容式觸控感應器，特別是有關於獨立矩陣感測單元架構的單層投射電容式觸控感應器。This creation relates to a projected capacitive touch sensor, especially a single-layer projected capacitive touch sensor with an independent matrix sensing unit architecture.

投射電容式觸控感應器具備多點觸控(Multitouch)功能，所以目前已被廣泛地應用於各式電子產品上；其中，獨立矩陣感測單元(Independent-matrix sense elements)架構的投射電容式觸控感應器是由佈線在單層導電膜上的複數感應陣列所組成，每一感應陣列具一共用感應電極及多數的驅動電極，該等感應電極及驅動電極分別通過電極連線(Connection wiring)而連接至電接點，該等電接點被設置在觸控板的邊緣部位，且分別搭接於信號排線(FPC or FFC)，據此將該觸控感應器所擷取的觸控信號傳輸至一感應信號處理單元。如圖7所示，由於獨立矩陣感測單元架構的驅動電極以及感應電極均被佈設在單一導電層，且各個電極均直接藉由電極連線(CW)連接至設在周緣部位的電接點10’，由於電接點10’數量繁多，不僅導致與其配合搭接的信號排線寬度尺寸變成非常碩大，而且容易產生少部分電接點接觸不良，導致觸控面板無法正常運作。The projected capacitive touch sensor has multi-touch (Multitouch) function, so it has been widely used in various electronic products; Among them, the projected capacitive type of independent matrix sensing elements (Independent-matrix sense elements) structure The touch sensor is composed of a plurality of sensing arrays wired on a single conductive film, each sensing array has a common sensing electrode and a plurality of driving electrodes, and these sensing electrodes and driving electrodes are respectively connected by electrodes (Connection wiring ) And connected to electrical contacts, which are located at the edge of the touchpad, and are connected to the signal cable (FPC or FFC) respectively, according to which the touch sensor captures the touch The control signal is transmitted to an inductive signal processing unit. As shown in FIG. 7, since the driving electrodes and the sensing electrodes of the independent matrix sensing unit architecture are both arranged on a single conductive layer, and each electrode is directly connected to the electrical contact provided at the peripheral portion through the electrode connection (CW) 10'. Due to the large number of electrical contacts 10', not only does the width of the signal cable overlapped with it become very large, but also a small number of electrical contacts are prone to poor contact, resulting in the normal operation of the touch panel.

再如圖8及圖9所示，為了減少觸控板的邊緣設置面積，一種具備橋接區結構的獨立矩陣感測單元架構被提出，該橋接區結構主要是將各感應陣列上數量眾多的感應電極及驅動電極的電接點10’分布設置在觸控板的一側邊緣部位再利用一絕緣膜20’覆設於該等電接點10’上，並在絕緣膜上與電接點相應位置開設貫穿孔30’，然後藉由驅動電極的信號導線TX通過該等絕緣膜的貫穿孔30’將各個感應陣列的位於同一軸線位置上的驅動電極電接點10’彼此電性連接以串聯形成一信號通道(Channel)，據此減少與信號排線搭接組合的電接點數量，以及減少在觸控板邊框部位的信號導線佈線數量，以達縮小觸控板邊框寬度的目的。然而，在前述橋接區結構中，該等感應電極的信號導線RX及驅動電極的信號導線TX是分布設在同一側邊的平面而平行地設置，因此如果前述佈線架構的技術應用在大面積或高感應精度的觸控面板時，觸控面板上所設置的大量感應陣列，將使感應電極的信號導線RX及驅動電極的信號導線TX佈線數量倍增，仍將面臨邊框尺寸無法有效縮減的困擾，這結果不僅會使邊框形成肥大難看的外觀，也會排擠有效觸控操作面積，導致觸控感應靈敏度的下降。As shown in FIGS. 8 and 9 again, in order to reduce the edge setting area of the touch panel, an independent matrix sensing unit architecture with a bridge area structure is proposed. The bridge area structure mainly uses a large number of sensors on each sensing array. The electrical contacts 10' of the electrode and the driving electrode are distributed on one edge of the touch panel, and then covered with an insulating film 20' on the electrical contacts 10', and correspond to the electrical contacts on the insulating film The through holes 30' are opened at the position, and then the driving electrode electrical contacts 10' of each sensing array at the same axis position are electrically connected to each other in series through the through holes 30' of the insulating films through the signal wires TX of the driving electrodes A signal channel is formed, thereby reducing the number of electrical contacts combined with the signal cable and the number of signal wirings at the border of the touchpad to reduce the width of the touchpad. However, in the aforementioned bridge region structure, the signal wires RX of the sensing electrodes and the signal wires TX of the driving electrodes are distributed on the same side plane and are arranged in parallel. Therefore, if the technology of the foregoing wiring architecture is applied to a large area or In a touch panel with high sensing accuracy, the large number of sensing arrays provided on the touch panel will double the number of wirings of the signal wires RX of the sensing electrodes and the signal wires TX of the driving electrodes, and will still be faced with the problem that the frame size cannot be effectively reduced. This result will not only make the frame look fat and ugly, but also squeeze out the effective touch operation area, resulting in a decrease in touch sensitivity.

針對前述具備橋接區的獨立矩陣感測單元架構的缺失，一種具雙橋接區的獨立矩陣感測單元架構已被進一步提出以便克服大面積觸控面板應用的問題，其大體結構與前述具備橋接區的獨立矩陣感測單元架構類似，主要差異是在觸控板的二相對側邊緣部位分別設置一橋接區結構，並將觸控感應層上數量繁多的驅動電極劃分成二部份的驅動電極群組，藉電極連線分別各自連接至二橋接區結構上的電接點，再利用一設有貫穿孔的絕緣膜覆設以及驅動電極的信號導線將各個同一軸線位置上的驅動電極電接點串聯形成一信號通道，據此平均分散驅動電極信號導線的佈線數量至二側，達到降低邊框的寬度的目的；然而根據前述結構的設置，該等各個感應陣列的共用感應電極的信號導線RX會穿越該二個橋接區的其中之一個區域，因此在該橋接區中穿越的信號導線RX會與用以串聯形成一信號通道的各條驅動電極的信號導線TX呈絕緣交叉設置，形成電容節點結構，從而該等驅動電極信號導線TX走線通過該節點處就會與該穿越的信號導線RX產生耦合而使相應的節點電容值增加；但是在另外一個橋接區中因為沒有共用感應電極信號導線RX的穿越，所以不會形成電容節點結構，當然該等驅動電極信號導線TX上也就沒有節點電容值增加的情形；這結果將導致通過該二個橋接區的驅動電極信號導線TX上的節點電容值差異甚多(參見圖10所示的節點電容值分布圖)，由於二者的充放電特性差異過大，將造成觸控功能下降，以及增加感應信號處理單元在設計上的困難。In response to the lack of the aforementioned independent matrix sensing unit architecture with a bridge area, an independent matrix sensing unit architecture with a dual bridge area has been further proposed to overcome the problems of large-area touch panel applications. Its general structure is the same as that of the aforementioned bridge area The structure of the independent matrix sensing unit is similar, the main difference is that a bridging area structure is provided on the two opposite side edges of the touch panel, and the large number of driving electrodes on the touch sensing layer are divided into two driving electrode groups Group, respectively connect to the electrical contacts on the structure of the second bridge area through the electrode wires, and then use an insulating film with a through hole to cover and the signal wires of the driving electrodes to connect the electrical contacts of the driving electrodes on the same axis position A signal channel is formed in series, according to which the wiring number of the signal wires of the driving electrodes is evenly distributed to the two sides to achieve the purpose of reducing the width of the frame; It passes through one of the two bridge areas, so the signal wire RX passing through the bridge area and the signal wire TX of each driving electrode used to form a signal channel in series are insulated and crossed to form a capacitor node structure , So that the driving electrode signal wire TX trace will be coupled with the crossing signal wire RX through the node, so that the corresponding node capacitance value increases; but in another bridge area because there is no common sensing electrode signal wire RX , The capacitor node structure will not be formed. Of course, there is no increase in the node capacitance value on the driving electrode signal wires TX; this result will lead to the node capacitance on the driving electrode signal wires TX passing through the two bridge regions There are many differences in values (see the distribution diagram of the node capacitance values shown in FIG. 10). Because the difference between the charge and discharge characteristics of the two is too large, it will cause a decrease in the touch function and increase the difficulty in designing the sensing signal processing unit.

本創作提供一種改進的具雙橋接區的單層投射電容式觸控感應器結構，其觸控感應器具有獨立矩陣感測單元架構，該觸控感應器上包含複數感應陣列，每一感應陣列具一共用感應電極及複數驅動電極，而數量繁多的該等驅動電極被劃分成二群組並分別通過電極連線而連接至二個設置在邊緣部位的橋接區內的電接點，在各橋接區分別覆設一絕緣膜，在該絕緣膜上與電該等接點的相應位置開設貫穿孔，藉由驅動電極信號導線通過該等貫穿孔將該觸控感應器上各個感應陣列的位於同一軸線位置上的驅動電極電接點彼此電性連接以串聯形成一信號通道，以及，電性連接該等共用感應電極的信號導線穿越通過前述二個橋接區的其中之一，並與前述用以串聯形成一信號通道的各條驅動電極信號導線呈絕緣交叉設置，而該等共用感應電極還設有電極延伸部，該電極延伸部被延伸設置於另一個橋接區中，並與前述用以串聯形成一信號通道的各條驅動電極信號導線呈絕緣交叉設置，據此達到縮小觸控感應器邊框寬度的目的，以及平衡通過該二個橋接區的驅動電極信號導線的節點電容值之效果。This creation provides an improved single-layer projected capacitive touch sensor structure with dual bridge areas. The touch sensor has an independent matrix sensing unit architecture. The touch sensor includes a plurality of sensing arrays, each sensing array There is a common sensing electrode and a plurality of driving electrodes, and a large number of these driving electrodes are divided into two groups and are connected to two electrical contacts provided in the bridging area of the edge part through the electrode connection, in each The bridge area is covered with an insulating film, through holes are formed on the insulating film and the corresponding positions of the contacts, and each sensing array on the touch sensor is located by driving electrode signal wires through the through holes The electrical contacts of the driving electrodes at the same axis position are electrically connected to each other to form a signal channel in series, and the signal wire electrically connecting the common sensing electrodes passes through one of the two bridge areas and is used in conjunction with the aforementioned The signal wires of the driving electrodes connected in series to form a signal channel are arranged in an insulated cross, and the common sensing electrodes are also provided with an electrode extension, which is extended in another bridge region and used in conjunction with the aforementioned The signal wires of the driving electrodes connected in series to form a signal channel are arranged in an insulated cross, thereby achieving the purpose of reducing the width of the border of the touch sensor and balancing the node capacitance value of the signal wires of the driving electrodes passing through the two bridge regions.

此將於下文中進一步闡明本創作的其他功能及技術特徵，熟習本技術者熟讀文中的說明後即可據以實現本創作。This will further clarify the other functions and technical features of this creation in the following, and those skilled in the art can realize this creation after reading the instructions in the text.

如後附各圖所描述的本案較佳實施例為一具雙橋接區的單層投射電容式觸控感應器，其中，為提供更清楚的描述及更易理解本創作的技術特徵，圖式內各部分並沒有依照其相對尺寸繪圖，某些尺寸與其他相關尺度相比已經被誇張；不相關之細節部分也未完全繪出，以求圖式的簡潔。As described in the accompanying drawings, the preferred embodiment of the present case is a single-layer projected capacitive touch sensor with a dual bridge area. In order to provide a clearer description and easier understanding of the technical features of this creation, the drawings Each part has not been drawn according to its relative size, and some sizes have been exaggerated compared with other related scales; irrelevant details have not been completely drawn out in order to make the diagram concise.

由圖1至圖3中顯示本實施例主要包含透明基底層1、透明觸控感應層2、橋接絕緣層3及信號導線層4；其中，該透明基底層1為一高透光率的透明薄層，可選用各種具有優良機械強度的高透光率薄板，例如玻璃板或聚甲基丙烯酸甲酯等，亦可選用透明柔性薄膜，例如聚對苯二甲酸乙二酯或聚碳酸酯的薄膜，但該基底層的材料種類不以前述實施範圍為限；在該基底層1表面的四周邊緣區域設有由不透光或低透光率的絕緣性材料塗布形成的邊框1a，利用在該不透光邊框1a的設置因此在基底層1上界定出一形成在中央部位的可瞻區11，以一形成在四周邊緣部位的遮蔽區12；前述絕緣性材料可選用油墨或光阻(photoresist)等材料，但可實施的材料範圍不以此為限。1 to 3 show that this embodiment mainly includes a transparent base layer 1, a transparent touch sensing layer 2, a bridge insulating layer 3 and a signal wire layer 4; wherein, the transparent base layer 1 is a high-transparency transparent For the thin layer, various high-transmittance thin plates with excellent mechanical strength can be selected, such as glass plates or polymethyl methacrylate, etc., and transparent flexible films such as polyethylene terephthalate or polycarbonate can also be used. Thin film, but the material type of the base layer is not limited to the foregoing implementation range; the frame 1a formed by coating an opaque or low transmittance insulating material on the peripheral area of the surface of the base layer 1 is used in The arrangement of the opaque frame 1a therefore defines a viewable area 11 formed in the central portion on the base layer 1, and a shielding area 12 formed in the peripheral edge portion; the aforementioned insulating material may be ink or photoresist ( photoresist) and other materials, but the range of materials that can be implemented is not limited to this.

該透明觸控感應層2是由高透光率的導電材料所製成的，前述透明導電材料是選自於氧化銦錫、氧化銦鋅、氧化鋅鋁或聚乙撐二氧噻吩等材質的透明薄膜，但不限於此；該透明觸控感應層略呈獨立矩陣感測單元(Independent-matrix sense elements)架構，具有複數個順沿第一方向(即，Y軸方向)且彼此間隔地平行設置的感應陣列2a及接地列2b，且該等感應陣列2a形成在前述可瞻區11的範圍內；由於在大面積觸控感應器的實施態樣中，所述獨立矩陣感測單元架構中包含複數感應陣列2a，且每一感應陣列2a都是由一共用感應電極(Common Sensing Electrode)及複數驅動電極(Driving Electrode)所共同組成，所以在本實施例中將該等數量繁多的驅動電極劃分成上部驅動電極群組及下部驅動電極群組，以便將其信號導線的佈線數量平均分散至二側邊緣，達到縮減所需的佈線空間及降低邊框的寬度的目的；再請詳參圖4所示，個別的感應陣列2a包含多個第一上部感應電極21(即，上部驅動電極群組)、多個第一下部感應電極24(即，下部驅動電極群組)以及一第二感應電極27(即，感應電極)，其中，第一上部感應電極21、第一下部感應電極24均呈短梳狀造型，且其側邊具有數個沿第二方向(即，X軸方向)延伸設置的驅動導體，而第二感應電極27呈長梳狀造型，且其側邊具有多個沿第二方向(即，X軸方向)延伸設置的的感應導體，使第一上部感應電極21、第一下部感應電極24與第二感應電極27彼此呈互補形狀對應設置；此外，個別的第一上部感應電極21通過一電極連線 (Connection wiring) 211而電性連接至設在上部橋接區28內的第一上部電接點212，個別的第一下部感應電極24通過一電極連線241而電性連接至設在下部橋接區29內的第一下部電接點242；第二感應電極27的第一端(即，上端)通過一電極連線271穿越前述上部橋接區28且電性連接至第二電接點272，而第二感應電極27的第二端(即，下端)設有電極延伸部273，該電極延伸部273形成在前述下部橋接區29內，且該電極延伸部273的延伸長度至少超過該等第一下部電接點(242)之中設置在最下方者的位置，或者是穿越前述下部橋接區29；前述上部橋接區28、下部橋接區29與第二電接點272皆形成在前述遮蔽區12的範圍內；另，前述接地列2b的第一端形成在上部橋接區28內，且其第二端形成在下部橋接區29內。The transparent touch sensing layer 2 is made of a conductive material with high light transmittance. The transparent conductive material is selected from indium tin oxide, indium zinc oxide, zinc aluminum oxide or polyethylene dioxythiophene. Transparent film, but not limited to this; the transparent touch-sensing layer is slightly independent-matrix sense elements (Independent-matrix sense elements) structure, having a plurality of along the first direction (ie, Y-axis direction) and spaced parallel to each other A sensing array 2a and a grounding column 2b are provided, and the sensing arrays 2a are formed within the range of the aforementioned visible area 11; due to the implementation of the large-area touch sensor, the independent matrix sensing unit architecture A plurality of sensing arrays 2a are included, and each sensing array 2a is composed of a common sensing electrode (Common Sensing Electrode) and a plurality of driving electrodes (Driving Electrode), so in this embodiment a large number of these driving electrodes Divided into upper drive electrode group and lower drive electrode group, in order to evenly distribute the number of signal wires to the edges of the two sides, to achieve the purpose of reducing the required wiring space and reducing the width of the border; please refer to Figure 4 for details As shown, the individual sensing array 2a includes a plurality of first upper sensing electrodes 21 (ie, upper driving electrode group), a plurality of first lower sensing electrodes 24 (ie, lower driving electrode group), and a second sensing The electrode 27 (that is, the sensing electrode), wherein the first upper sensing electrode 21 and the first lower sensing electrode 24 are in the shape of a short comb, and their sides have several along the second direction (that is, the X-axis direction) The extended driving conductor, and the second sensing electrode 27 is in the shape of a long comb, and has a plurality of sensing conductors extending along the second direction (ie, the X-axis direction) on the side to make the first upper sensing electrode 21 1. The first lower sensing electrode 24 and the second sensing electrode 27 are arranged in a complementary shape to each other; in addition, the individual first upper sensing electrodes 21 are electrically connected to the upper bridge via a connection wiring 211 In the first upper electrical contact 212 in the area 28, the individual first lower sensing electrodes 24 are electrically connected to the first lower electrical contact 242 provided in the lower bridge area 29 through an electrode connection 241; The first end (ie, the upper end) of the two sensing electrodes 27 passes through the upper bridge region 28 through an electrode connection 271 and is electrically connected to the second electrical contact 272, and the second end (ie, the The lower end) is provided with an electrode extension 273 formed in the lower bridge region 29, and the electrode extension 273 extends at least beyond the first lower electrical contacts (242) The position of the lowermost one, or through the lower bridge region 29; the upper bridge region 28, the lower bridge region 29, and the second electrical contact 272 are all formed within the range of the shielding region 12; In addition, the ground column 2b The first end is formed in the upper part The bridge region 28 is formed, and its second end is formed in the lower bridge region 29.

該橋接絕緣層3包含一上部橋接絕緣膜31及一下部橋接絕緣膜35，其中，上部橋接絕緣膜31被覆設在前述上部橋接區28，且在該上部橋接絕緣膜31上設有多個貫穿孔32分別對應於前述各個第一上部電接點212及接地列2b的第一端的位置；下部橋接絕緣膜35則被覆設在前述下部橋接區29，且在該下部橋接絕緣膜35上設有多個貫穿孔36分別對應於前述各個第一下部電接點242的位置。The bridging insulating layer 3 includes an upper bridging insulating film 31 and a lower bridging insulating film 35, wherein the upper bridging insulating film 31 is covered on the upper bridging region 28, and a plurality of penetrations are provided on the upper bridging insulating film 31 The holes 32 correspond to the positions of the first upper electrical contacts 212 and the first ends of the grounding columns 2b, respectively; the lower bridge insulating film 35 is covered on the lower bridge region 29, and is provided on the lower bridge insulating film 35 There are a plurality of through holes 36 corresponding to the positions of the respective first lower electrical contacts 242 mentioned above.

該信號導線層4被設置於前述遮蔽區12的範圍內，其包含多條第一上部信號導線41(即，上部驅動信號導線)、多條第一下部信號導線42、多條第二信號導線43(即，下部驅動信號導線)、接地信號導線44及信號輸出埠48，其中，個別第一上部信號導線41通過前述上部橋接絕緣膜31上的貫穿孔32電性連接第一上部電接點212，且將各個感應陣列2a之位於第二方向的同一軸線上的第一上部電接點212電性連接以串聯形成一信號通道，第一上部信號導線41的末端電性連接到信號輸出埠48，而該信號輸出埠48設置在前述遮蔽區12的外側邊緣部位；個別第一下部信號導線42通過前述下部橋接絕緣膜35上的貫穿孔36電性連接第一下部電接點242，且將各個感應陣列2a之位於第二方向的同一軸線上的第一下部電接點242電性連接以串聯形成一信號通道，第一下部信號導線42的末端電性連接到信號輸出埠48；個別第二信號導線43分別電性連接於個別第二電接點272，且第二信號導線43的末端電性連接到信號輸出埠48；該接地信號導線44通過前述上部橋接絕緣膜31上的貫穿孔32電性連接該接地列2b的第一端，將各個接地列2b形成一信號通道，該接地信號導線44的末端電性連接到信號輸出埠48；該信號導線層4由低電阻率的電導材料所製成，例如是金、銀、銅、鋁、鉬、鎳或前述材料合金的導電薄膜蝕刻而成，或是由導電銀漿或導電油墨印刷形成，但實施方式不以前述實施範圍為限。The signal wire layer 4 is disposed within the aforementioned shielding area 12 and includes a plurality of first upper signal wires 41 (ie, upper drive signal wires), a plurality of first lower signal wires 42 and a plurality of second signals The wire 43 (ie, the lower drive signal wire), the ground signal wire 44 and the signal output port 48, wherein the individual first upper signal wires 41 are electrically connected to the first upper electrical connection through the through holes 32 on the upper bridge insulating film 31 Point 212, and the first upper electrical contact 212 of each sensing array 2a on the same axis in the second direction is electrically connected to form a signal channel in series, and the end of the first upper signal wire 41 is electrically connected to the signal output Port 48, and the signal output port 48 is disposed at the outer edge of the shielding area 12; the individual first lower signal wires 42 are electrically connected to the first lower electrical contacts through the through holes 36 in the lower bridge insulating film 35 242, and the first lower electrical contact 242 of each sensing array 2a on the same axis in the second direction is electrically connected to form a signal channel in series, and the end of the first lower signal wire 42 is electrically connected to the signal Output port 48; the individual second signal wires 43 are electrically connected to the individual second electrical contacts 272, respectively, and the ends of the second signal wires 43 are electrically connected to the signal output port 48; the ground signal wire 44 is insulated by the aforementioned upper bridge The through-hole 32 in the film 31 is electrically connected to the first end of the ground column 2b, forming a signal channel for each ground column 2b, and the end of the ground signal wire 44 is electrically connected to the signal output port 48; the signal wire layer 4 It is made of conductive material with low resistivity, such as gold, silver, copper, aluminum, molybdenum, nickel, or conductive film of the aforementioned material alloy, or is formed by conductive silver paste or conductive ink printing, but the embodiment It is not limited to the aforementioned implementation range.

根據上述說明的觸控感應器結構，其係利用第一上部信號導線41(即，上部驅動信號導線)傳送第一上部感應電極21(即，上部驅動電極)的信號，第一下部信號導線42(即，下部驅動信號導線)傳送第一下部感應電極24(即，上部驅動電極)的信號，以及第二信號導線43 (即，感應信號導線)傳送第二感應電極27(即，感應電極)的信號，將該等到信號傳送至信號輸出埠48，再藉一FFC或FPC連接器搭接該信號輸出埠48以將觸控感應信號傳送至一信號處理迴路進行運算。由於本實施例藉由將觸控感應層上數量繁多的驅動電極劃分成上部驅動電極及下部驅動電極二個群組，並佈線至上、下部橋接區28、29中進行信號連接，據此信號連接的佈線數量平均分散至二側邊緣，並且利用該等具有貫穿孔的上、下部橋接絕緣膜31、35的設置，使第一上部信號導線41、第一下部信號導線42可將該等相關聯驅動電極的多個電接點212、242彼此串聯成一信號通道，從而可大幅減少該訊號導線層4上布設信號導線的數量，及縮減遮蔽區12的寬度，以便於窄邊觸控面板的設計應用。According to the touch sensor structure described above, the first upper signal wire 41 (ie, the upper drive signal wire) is used to transmit the signal of the first upper sensor electrode 21 (ie, the upper drive electrode), and the first lower signal wire 42 (ie, the lower driving signal wire) transmits the signal of the first lower sensing electrode 24 (ie, the upper driving electrode), and the second signal wire 43 (ie, the sensing signal wire) transmits the second sensing electrode 27 (ie, the sensing Electrode), the waiting signal is sent to the signal output port 48, and then the signal output port 48 is connected to the signal output port 48 by an FFC or FPC connector to transmit the touch sensing signal to a signal processing circuit for calculation. Since this embodiment divides the large number of driving electrodes on the touch sensing layer into two groups of upper driving electrodes and lower driving electrodes, and routes them to the upper and lower bridge regions 28 and 29 for signal connection, the signal connection is accordingly The number of wiring is evenly distributed to the edges of the two sides, and the use of the upper and lower bridge insulating films 31, 35 with through holes allows the first upper signal wire 41 and the first lower signal wire 42 to be related The plurality of electrical contacts 212 and 242 of the connected driving electrode are connected in series to form a signal channel, which can greatly reduce the number of signal wires arranged on the signal wire layer 4 and reduce the width of the shielding area 12 to facilitate the narrow-side touch panel Design application.

另外，如圖5所示，在本實施例的上部橋接區28中，第二感應電極27的第一端的電極連線271與第一上部信號導線41的交叉處形成電容節點結構，因此第一上部信號導線41走線通過該節點處會與第二感應電極27的電極連線271產生耦合而使相應的節點電容值增加，相同的，在下部橋接區29中，第二感應電極27第二端的電極延伸部273與第一下部信號導線42的交叉處也會形成電容節點結構，所以第一下部信號導線42走線通過該節點處會與第二感應電極27的電極延伸部273產生耦合而使相應的節點電容值增加，由此，走線通過上、下部橋接區28、29的第一上、下部信號導線41、42將具約略相同的節點電容值增加值(參見圖6所示的節點電容值分布圖)，達到平衡上部驅動電極群組及下部驅動電極群組二者的節點電容值變化之目的，據此避免因上、下部驅動電極群組的節點電容值差異過大所導致的各種不利特徵。In addition, as shown in FIG. 5, in the upper bridge region 28 of this embodiment, the intersection of the electrode connection 271 at the first end of the second sensing electrode 27 and the first upper signal wire 41 forms a capacitor node structure, so the first An upper signal wire 41 will be coupled to the electrode connection 271 of the second sensing electrode 27 through this node to increase the capacitance of the corresponding node. Similarly, in the lower bridge region 29, the second sensing electrode 27 The intersection of the electrode extensions 273 at the two ends and the first lower signal wire 42 will also form a capacitance node structure, so the first lower signal wire 42 passing through this node will meet the electrode extension 273 of the second sensing electrode 27 The coupling causes the corresponding node capacitance value to increase, and therefore, the first upper and lower signal wires 41, 42 of the trace passing through the upper and lower bridge regions 28, 29 will have approximately the same node capacitance value increase (see FIG. 6 The node capacitance value distribution diagram shown) achieves the purpose of balancing the change of the node capacitance value of both the upper drive electrode group and the lower drive electrode group, thereby avoiding the excessive difference in the node capacitance value of the upper and lower drive electrode groups The various unfavorable characteristics caused.

本創作的請求範圍包括在本創作保護範圍內的所有修正及變形。本創作並非侷限於以上所述形式，很明顯參考上述說明後，能有更多技術均等性的改良與變化；是以，凡有在相同之創作精神下所作有關本創作之任何修飾或變更，皆仍應包括在本創作意圖保護之範疇。The scope of the request for this creation includes all amendments and deformations within the protection scope of this creation. This creation is not limited to the above-mentioned form. Obviously, after referring to the above description, there can be more improvements and changes in technical equality; therefore, any modification or change related to this creation under the same creative spirit, All should still be included in the scope of protection of this creative intention.

1:基底層1: basal layer

1a:邊框1a: border

11:可瞻區11: Observable area

12:遮蔽區12: shaded area

2:觸控感應層2: Touch sensor layer

2a:感應陣列2a: sensor array

2b:接地列2b: Ground column

21:第一上部感應電極21: The first upper induction electrode

211:電極連線211: electrode connection

212:第一上部電接點212: First upper electrical contact

24:第一下部感應電極24: the first lower induction electrode

241:電極連線241: electrode connection

242:第一下部電接點242: First lower electrical contact

27:第二感應電極27: Second induction electrode

271:電極連線271: electrode connection

272:第二電接點272: Second electrical contact

273:電極延伸部273: electrode extension

28:上部橋接區28: Upper Bridge Zone

29:下部橋接區29: Lower Bridge Area

3:橋接絕緣層3: Bridge insulation

31:上部橋接絕緣膜31: upper bridge insulating film

32:貫穿孔32: through hole

35:下部橋接絕緣膜35: Lower bridge insulating film

36:貫穿孔36: through hole

4:信號導線層4: Signal wire layer

41:第一上部信號導線41: First upper signal wire

42:第一下部信號導線42: First lower signal wire

43:第二信號導線43: Second signal wire

44:接地信號導線44: Ground signal wire

48:信號輸出埠48: Signal output port

10’:電接點10’: electric contact

20’:絕緣膜20’: Insulating film

30’:貫穿孔30’: through hole

TX:驅動電極的信號導線TX: the signal wire driving the electrode

RX:感應電極的信號導線RX: the signal wire of the sensing electrode

圖1為本創作實施例的疊層組合示意圖。圖2為本創作實施例之構件分離的示意圖。圖3為本創作實施例之構件組合的平面圖。圖4為本創作實施例之感應陣列2a的平面圖。圖5為圖3的A部放大的平面圖。圖6為本創作實施例之第一上部信號導線(41)與第一下部信號導線(42)的節點電容值分布圖。圖7為一習知觸控感應器結構的平面圖。圖8為另一習知觸控感應器結構的平面圖。圖9為圖7之習知觸控感應器結構的構件分離示意圖。圖10為習知觸控感應器在二個橋接區中的驅動電極信號導線上的節點電容值分布圖。FIG. 1 is a schematic diagram of the stacking combination of the creative embodiment. FIG. 2 is a schematic diagram of component separation in the creative embodiment. Fig. 3 is a plan view of the component combination of the authoring embodiment. FIG. 4 is a plan view of the sensing array 2a of the creative embodiment. FIG. 5 is an enlarged plan view of part A of FIG. 3. FIG. 6 is a distribution diagram of node capacitance values of the first upper signal wire (41) and the first lower signal wire (42) of the authoring embodiment. 7 is a plan view of a conventional touch sensor structure. 8 is a plan view of another conventional touch sensor structure. FIG. 9 is a schematic diagram of components of the conventional touch sensor structure of FIG. 7. FIG. 10 is a distribution diagram of node capacitance values on the driving electrode signal wires of the conventional touch sensor in the two bridge regions.

1:基底層 1: basal layer

1a:邊框 1a: border

11:可瞻區 11: Observable area

12:遮蔽區 12: shaded area

2:觸控感應層 2: Touch sensor layer

2a:感應陣列 2a: sensor array

2b:接地列 2b: Ground column

211:電極連線 211: electrode connection

212:第一上部電接點 212: First upper electrical contact

241:電極連線 241: electrode connection

242:第一下部電接點 242: First lower electrical contact

271:電極連線 271: electrode connection

272:第二電接點 272: Second electrical contact

273:電極延伸部 273: electrode extension

31:上部橋接絕緣膜 31: upper bridge insulating film

32:貫穿孔 32: through hole

35:下部橋接絕緣膜 35: Lower bridge insulating film

36:貫穿孔 36: through hole

4:信號導線層 4: Signal wire layer

41:第一上部信號導線 41: First upper signal wire

42:第一下部信號導線 42: First lower signal wire

43:第二信號導線 43: Second signal wire

44:接地信號導線 44: Ground signal wire

Claims

一種具雙橋接區的單層投射電容式觸控感應器，包含：透明基底層(1)，其中央區域為透明的可瞻區(11)，並於其四周邊緣區域設有邊框(1a)以形成一遮蔽區(12)；透明觸控感應層(2)，是由高透光率的導電材料所製成的的獨立矩陣感測單元結構，其具有複數順沿第一方向且彼此間隔地平行設置的感應陣列(2a)及接地列(2b)，複數所述感應陣列(2a)係形成在所述可瞻區(11)的範圍內，其中，個別所述感應陣列(2a)包含複數第一上部感應電極(21)、複數第一下部感應電極(24)以及一第二感應電極(27)，個別的所述第一上部感應電極(21)通過一電極連線(211)而電性連接至設在上部橋接區(28)內的第一上部電接點(212)，個別的所述第一下部感應電極(24)通過一電極連線(241)而電性連接至設在下部橋接區(29)內的第一下部電接點(242)，所述上部橋接區(28)與所述下部橋接區(29)皆形成在所述遮蔽區(12)的範圍內；所述第二感應電極(27)的第一端通過一電極連線(271)穿越所述上部橋接區(28)且電性連接至第二電接點(272)，所述第二感應電極(27)的第二端設有電極延伸部(273)，所述電極延伸部(273)形成在所述下部橋接區(29)內，所述接地列(2b)的第一端形成在所述上部橋接區(28)內且其第二端形成在所述下部橋接區(29)內；絕緣膜層(3)，其包含一上部橋接絕緣膜(31)及一下部橋接絕緣膜(35)，其中，所述上部橋接絕緣膜(31)被覆設在所述上部橋接區(28)，且在所述上部橋接絕緣膜(31)上設有複數貫穿孔(32)分別對應於複數所述第一上部電接點(212)及複數所述接地列(2b)的第一端的位置，所述下部橋接絕緣膜(35)被覆設在所述下部橋接區(29)，且在所述下部橋接絕緣膜(35)上設有複數貫穿孔(36)分別對應於複數所述第一下部電接點(242)的位置；以及信號導線層(4)，其被設置於所述遮蔽區(12)的範圍內，其包含複數第一上部信號導線(41)、複數第一下部信號導線(42)、複數第二信號導線(43)、接地信號導線(44)及信號輸出埠(48)，其中，所述第一上部信號導線(41)通過所述上部橋接絕緣膜(31)上的貫穿孔(32)電性連接所述第一上部電接點(212)，且將各個所述感應陣列(2a)之位於第二方向的同一軸線上的第一上部電接點(212)電性連接以串聯形成一信號通道，所述第一上部信號導線(41)的末端電性連接到所述信號輸出埠(48)，所述信號輸出埠(48)設置在所述遮蔽區(12)的外側邊緣部位，所述第一下部信號導線(42)通過所述下部橋接絕緣膜(35)上的貫穿孔(36)電性連接所述第一下部電接點(242)，且將各個所述感應陣列(2a)之位於第二方向的同一軸線上的各個所述第一下部電接點(242)電性連接以串聯形成一信號通道，所述第一下部信號導線(42)的末端電性連接到所述信號輸出埠(48)，所述第二信號導線(43)電性連接於所述第二電接點(272)上，並且所述第二信號導線(43)的末端電性連接到所述信號輸出埠(48)，所述接地信號導線(44)通過所述上部橋接絕緣膜(31)上的貫穿孔(32)電性連接所述接地列(2b)的第一端，將各個所述接地列(2b)串聯形成一信號通道，所述接地信號導線(44)的末端電性連接所述信號輸出埠(48)；其特徵在於，在所述上部橋接區(28)中複數所述第二感應電極(27)的電極連線(271)與複數所述第一上部信號導線(41)呈絕緣交叉設置，在所述下部橋接區(29)中複數所述第二感應電極(27)的電極延伸部(273)與複數所述第一下部信號導線(42)呈絕緣交叉設置，複數所述絕緣交叉設置處形成電容節點。 A single-layer projected capacitive touch sensor with dual bridge areas, comprising: a transparent base layer (1), the central area of which is a transparent viewable area (11), and a frame (1a) on the surrounding edge area To form a shielding area (12); the transparent touch-sensing layer (2) is an independent matrix sensing unit structure made of a high-transmittance conductive material, which has complex numbers along the first direction and are spaced apart from each other A sensing array (2a) and a grounding column (2b) arranged in parallel to the ground, a plurality of the sensing arrays (2a) are formed within the range of the viewable area (11), wherein each of the sensing arrays (2a) includes A plurality of first upper sensing electrodes (21), a plurality of first lower sensing electrodes (24) and a second sensing electrode (27), the individual first upper sensing electrodes (21) are connected by an electrode (211) And electrically connected to the first upper electrical contact (212) provided in the upper bridge region (28), and the individual first lower sensing electrodes (24) are electrically connected through an electrode connection (241) To the first lower electrical contact (242) provided in the lower bridge region (29), both the upper bridge region (28) and the lower bridge region (29) are formed in the shielding region (12) Within the range; the first end of the second sensing electrode (27) passes through the upper bridge region (28) through an electrode connection (271) and is electrically connected to the second electrical contact (272), the first The second end of the two sensing electrodes (27) is provided with an electrode extension (273), the electrode extension (273) is formed in the lower bridge region (29), and the first end of the grounding column (2b) Formed in the upper bridging region (28) and its second end is formed in the lower bridging region (29); an insulating film layer (3) including an upper bridging insulating film (31) and a lower bridging insulation A film (35), wherein the upper bridge insulating film (31) is covered on the upper bridge region (28), and the upper bridge insulating film (31) is provided with a plurality of through holes (32) corresponding to At the positions of the first ends of the plurality of first upper electrical contacts (212) and the plurality of ground columns (2b), the lower Part of the bridge insulating film (35) is covered on the lower bridge region (29), and a plurality of through holes (36) are provided on the lower bridge insulating film (35) respectively corresponding to the plurality of first lower electric The position of the contact (242); and the signal conductor layer (4), which is arranged within the range of the shielding area (12), and includes a plurality of first upper signal conductors (41) and a plurality of first lower signal conductors (42), a plurality of second signal wires (43), a ground signal wire (44) and a signal output port (48), wherein the first upper signal wire (41) passes on the upper bridge insulating film (31) The through hole (32) electrically connects the first upper electrical contact (212), and connects the first upper electrical contact (212) of each sensing array (2a) on the same axis in the second direction Electrically connected to form a signal channel in series, the end of the first upper signal wire (41) is electrically connected to the signal output port (48), the signal output port (48) is disposed in the shielding area ( 12) At the outer edge portion, the first lower signal wire (42) is electrically connected to the first lower electrical contact (242) through the through hole (36) on the lower bridge insulating film (35) And electrically connect each of the first lower electrical contacts (242) of the sensing array (2a) on the same axis in the second direction to form a signal channel in series, the first lower portion The end of the signal wire (42) is electrically connected to the signal output port (48), the second signal wire (43) is electrically connected to the second electrical contact (272), and the second The end of the signal wire (43) is electrically connected to the signal output port (48), and the grounded signal wire (44) is electrically connected to the through-hole (32) on the upper bridge insulating film (31) The first end of the grounding column (2b) connects each of the grounding columns (2b) in series to form a signal channel, and the end of the grounding signal wire (44) is electrically connected to the signal output port (48); In the upper bridge area (28), the electrode wires (271) of the plurality of second sensing electrodes (27) and the plurality of first upper signal wires (41) are insulated and intersected, and are bridged at the lower portion The electrode extension (273) of the plurality of second sensing electrodes (27) in the area (29) and A plurality of the first lower signal wires (42) are arranged in an insulated cross, and a plurality of the insulated crossings form a capacitance node.

如請求項1所述之觸控感應器，其中，所述透明觸控感應層(2)的導電材料是選自於氧化銦錫、氧化銦鋅、氧化鋅鋁或聚乙撐二氧噻吩。 The touch sensor according to claim 1, wherein the conductive material of the transparent touch sensing layer (2) is selected from indium tin oxide, indium zinc oxide, zinc aluminum oxide, or polyethylene dioxythiophene.

如請求項1所述之觸控感應器，其中，所述第一上部感應電極(21)與所述第一下部感應電極(24)為驅動電極，所述第二感應電極(27)為共用感應電極。 The touch sensor according to claim 1, wherein the first upper sensing electrode (21) and the first lower sensing electrode (24) are driving electrodes, and the second sensing electrode (27) is Common sensing electrodes.

如請求項1所述之觸控感應器，其中，所述信號導線層(4)由金、銀、銅、鋁、鉬、鎳或前述材料合金的導電薄膜蝕刻形成。 The touch sensor according to claim 1, wherein the signal wire layer (4) is formed by etching a conductive film of gold, silver, copper, aluminum, molybdenum, nickel, or an alloy of the foregoing materials.

如請求項1所述之觸控感應器，其中，所述信號導線層(4)由導電銀漿或導電油墨印刷形成。 The touch sensor according to claim 1, wherein the signal wire layer (4) is formed by conductive silver paste or conductive ink printing.

如請求項1所述之觸控感應器，其中，所述邊框(1a)是由不透光或低透光率的絕緣性材料形成的薄膜層，所述絕緣性材料選自於油墨或光阻。 The touch sensor according to claim 1, wherein the frame (1a) is a thin film layer formed of an opaque or low-transmittance insulating material selected from ink or light Hinder.

如請求項1所述之觸控感應器，其中，所述電極延伸部(273)形成在所述下部橋接區(29)內且其延伸長度至少超過複數所述第一下部電接點(242)之中設置在最下方者的位置。 The touch sensor according to claim 1, wherein the electrode extension (273) is formed in the lower bridge region (29) and its extension length exceeds at least a plurality of the first lower electrical contacts ( 242) is set at the lowermost position.

如請求項1所述之觸控感應器，其中，所述電極延伸部(273)穿越所述下部橋接區(29)。 The touch sensor according to claim 1, wherein the electrode extension (273) passes through the lower bridge region (29).