TWI581146B - Touch panel - Google Patents
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- TWI581146B TWI581146B TW104131545A TW104131545A TWI581146B TW I581146 B TWI581146 B TW I581146B TW 104131545 A TW104131545 A TW 104131545A TW 104131545 A TW104131545 A TW 104131545A TW I581146 B TWI581146 B TW I581146B
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- Position Input By Displaying (AREA)
Description
本發明係關於一種觸控面板，尤指一種具有表面外觀與視覺效果之觸控面板。The present invention relates to a touch panel, and more particularly to a touch panel having a surface appearance and a visual effect.
由於觸控面板具有人機互動的特性，已被廣泛應用於智慧型手機（smart phone）、衛星導航系統（GPS navigator system)、平板電腦（tablet PC）以及筆記型電腦（laptop PC）等電子產品上。Due to the human-computer interaction characteristics of touch panels, they have been widely used in electronic products such as smart phones, GPS navigator systems, tablet PCs, and laptop PCs. on.
一般而言，觸控面板會包括觸控區與邊框區，其中觸控區用來設置觸控電極，而邊框區通常會設置油墨材料層以遮蔽邊框區的電子元件，例如金屬走線。其中，為了使金屬走線能電連接於觸控電極，習知觸控面板會設計在油墨材料層中設置開孔以及在開孔中灌入有色之導電碳漿，以使金屬走線能藉由開孔而電連接於觸控電極。然而，一般的導電碳漿與油墨材料層具有一定的色差，使得在邊框區可以看到開孔圖案，影響觸控面板的外觀視覺效果。若欲改善視效問題，則必須花費一定的成本進行導電碳漿的選色與調色，以使導電碳漿的顏色能接近或匹配油墨材料層，使得整體製造成本與複雜度大幅上升。因此，上述觸控面板中油墨材料層開孔造成視覺效果不佳之問題仍待業界研究以進一步改善。In general, the touch panel includes a touch area and a frame area, wherein the touch area is used to set the touch electrodes, and the frame area is usually provided with an ink material layer to shield the electronic components of the frame area, such as metal traces. In order to enable the metal trace to be electrically connected to the touch electrode, the conventional touch panel is designed to provide an opening in the ink material layer and a colored conductive carbon paste in the opening so that the metal trace can be borrowed. It is electrically connected to the touch electrode by the opening. However, the general conductive carbon paste and the ink material layer have a certain color difference, so that the opening pattern can be seen in the frame area, which affects the visual appearance of the touch panel. If the visual effect problem is to be improved, the color selection and color adjustment of the conductive carbon paste must be performed at a certain cost so that the color of the conductive carbon paste can approach or match the ink material layer, so that the overall manufacturing cost and complexity are greatly increased. Therefore, the problem of poor visual effect caused by the opening of the ink material layer in the above touch panel is still to be further studied by the industry.
本發明的目的之一在於提供一種觸控面板，經由其基板表面的邊框層、絕緣層與導電層的特殊疊層設計，可以改善觸控面板表面的視覺效果。One of the objectives of the present invention is to provide a touch panel that can improve the visual effect of the surface of the touch panel via a special laminate design of the bezel layer, the insulating layer and the conductive layer on the surface of the substrate.
本發明之一實施例係提供一種觸控面板，其包括一基板、一邊框層、一第一導電層、一絕緣層、一第二導電層及一第三導電層。其中，該基板表面定義有一觸控區與一邊框區，且該邊框區至少設於該觸控區之一側。該基板之一表面為該觸控面板之觸控面。該邊框層設於該基板相反於該觸控面之一表面上並位於該邊框區內。該第一導電層設於該基板相反於該觸控面之該表面上，且該第一導電層包括至少設於該觸控區之複數個觸控電極與至少由該觸控區延伸至該邊框區之複數條延伸導線。各該延伸導線分別連接於該等觸控電極之其中一者，其中位於該邊框區之部分該延伸導線係覆蓋該邊框層。該絕緣層設於該邊框區並覆蓋設於該邊框區之部分該延伸導線，且該絕緣層包括複數個接觸孔，分別曝露出設於該絕緣層與該邊框層之間的該等條延伸導線。該第二導電層設於該等接觸孔中以於該等接觸孔中分別形成一接觸元件。該第三導電層設於該絕緣層表面並位於該邊框區。該第三導電層包括複數條周邊走線分別電連接於該等觸控電極之至少其中一者，且至少部分該等周邊走線係藉由該等接觸元件而電連接於該等觸控電極。An embodiment of the present invention provides a touch panel including a substrate, a bezel layer, a first conductive layer, an insulating layer, a second conductive layer, and a third conductive layer. The surface of the substrate defines a touch area and a frame area, and the frame area is disposed at least on one side of the touch area. One surface of the substrate is a touch surface of the touch panel. The frame layer is disposed on a surface of the substrate opposite to the touch surface and located in the frame region. The first conductive layer is disposed on the surface of the substrate opposite to the touch surface, and the first conductive layer includes at least a plurality of touch electrodes disposed in the touch area and extends from the touch area to the A plurality of extension wires of the frame area. Each of the extension wires is respectively connected to one of the touch electrodes, and a portion of the extension wires covering the frame region covers the frame layer. The insulating layer is disposed in the frame region and covers a portion of the extended wire disposed in the frame region, and the insulating layer includes a plurality of contact holes respectively exposing the strip extensions disposed between the insulating layer and the bezel layer wire. The second conductive layer is disposed in the contact holes to form a contact element in the contact holes. The third conductive layer is disposed on the surface of the insulating layer and located in the frame region. The third conductive layer includes a plurality of peripheral traces electrically connected to at least one of the touch electrodes, and at least some of the peripheral traces are electrically connected to the touch electrodes by the contact elements .
為使熟習本發明所屬技術領域之一般技藝者能更進一步瞭解本發明，下文特列舉本發明之較佳實施例，並配合所附圖式，詳細說明本發明的構成內容及所欲達成之功效。The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .
請參考第1圖與第2圖，第1圖為本發明第一實施例之觸控面板的俯視示意圖，第2圖為第1圖所示觸控面板的部分剖面示意圖，其中第2圖所示內容為沿著第1圖中以鍊線框線S標示出之部分的剖面結構。本實施例的觸控面板100為單層感應式（one layer sensing，OLS）觸控面板，但本發明的觸控面板也可為其他各種型式之觸控面板。如第1圖與第2圖所示，本發明觸控面板100包括一基板102、一邊框層122、一第一導電層120、一絕緣層124、一第二導電層134及一第三導電層128。基板102表面定義有一觸控區A1與一邊框區A2，其中邊框區A2至少設於觸控區A1之一側，本實施例係以邊框區A2圍繞觸控區A1的外緣為例，但不以此為限。基板102的一表面為觸控面板100之觸控面，在第2圖中，基板102的下表面102a為觸控面，亦即使用者在操作觸控面板100時係於基板102的下表面102a進行觸控。舉例而言，基板102可以用來當作一觸控顯示裝置之覆蓋板，其上表面102b係面向於該觸控顯示裝置之一顯示面板，但不以此為限。基板102的材料可以為玻璃覆蓋板、塑膠覆蓋板或其他具有高機械強度材質且具有透光效果的基板，但不以此為限。本發明之邊框層122係設於基板102相反於觸控面之表面上，亦即設於第2圖所示之基板102的上表面102b，且邊框層122位於邊框區A2內。根據本實施例，邊框層122係由不透明的有色油墨材料所構成，其光學密度係以能遮蔽其上側觸控面板100的其他電子元件為較佳，但不以此為限。Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a top plan view of a touch panel according to a first embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the touch panel shown in FIG. 1 , wherein FIG. 2 The content is a cross-sectional structure along a portion indicated by a chain line S in FIG. The touch panel 100 of the present embodiment is a single layer sensing (OLS) touch panel, but the touch panel of the present invention can also be other various types of touch panels. As shown in FIG. 1 and FIG. 2 , the touch panel 100 of the present invention includes a substrate 102 , a frame layer 122 , a first conductive layer 120 , an insulating layer 124 , a second conductive layer 134 , and a third conductive layer . Layer 128. The surface of the substrate 102 defines a touch area A1 and a frame area A2. The frame area A2 is disposed at least on one side of the touch area A1. In this embodiment, the outer edge of the touch area A1 is taken as an example. Not limited to this. One surface of the substrate 102 is a touch surface of the touch panel 100. In the second figure, the lower surface 102a of the substrate 102 is a touch surface, that is, the user is attached to the lower surface of the substrate 102 when the touch panel 100 is operated. 102a performs touch. For example, the substrate 102 can be used as a cover plate of a touch display device, and the upper surface 102b faces the display panel of the touch display device, but is not limited thereto. The material of the substrate 102 may be a glass cover plate, a plastic cover plate or other substrate having a high mechanical strength and having a light transmitting effect, but is not limited thereto. The frame layer 122 of the present invention is disposed on the surface of the substrate 102 opposite to the touch surface, that is, disposed on the upper surface 102b of the substrate 102 shown in FIG. 2, and the frame layer 122 is located in the frame area A2. According to the embodiment, the frame layer 122 is made of an opaque colored ink material, and the optical density is preferably other electronic components that can shield the upper touch panel 100, but is not limited thereto.
由於本實施例之觸控面板100為OLS觸控面板，因此其觸控元件主要由單一層第一導電層120所構成，亦即基板102的上表面102a之觸控區A1內用來構成觸控元件的主要導電材料僅包含一層第一導電層120。本實施例的OLS觸控面板係以互容式觸控面板為例，但不以此為限，在變化實施例中，本發明亦可應用於自容式觸控面板中，且在其他實施例中，觸控區A1也可包含複數層導電材料層以構成觸控元件。如圖所示，第一導電層120係設於基板102相反於觸控面之上表面102b上，由透明導電材料所構成。第一導電層120包括至少設於觸控區A1之複數個觸控電極與至少由觸控區A1延伸至邊框區A2之複數條延伸導線109、110。觸控電極可分為第一觸控電極106與第二觸控電極104，現以第一觸控電極106當作驅動電極，觸控電極104當作接收電極為例做說明，但本發明並不以此為限，在本發明之其他實施例中，亦可使第一觸控電極106當作接收電極，並使觸控電極104當作驅動電極以互相搭配進行觸控偵測。本實施例之第一觸控電極106係每八個一組而分別沿著一第一方向X排列成一條直行L ，並且這些直行L沿著第二方向Y互相並排，需注意的是，本實施例雖以排列成共八條直行L為例，但觸控面板100的第一觸控電極106的總數量、直行L的條數以及每一直行L中的第一觸控電極106之數量應依實際需求而有變化。另一方面，各第二觸控電極104係分別對應位於同一直行L中的複數個第一觸控電極106，並且分別位於直行L之一側或相鄰的直行L之間。舉例而言，本實施例中第一觸控電極106共排列成八條直行L，上側第一條直行L中的第一觸控電極106以標號1061表示，第二條直行L中的第一觸控電極106以標號1062表示，以此類推，最下側之直行L中的第一觸控電極106以標號1068表示，另一方面，本實施例之八個第二觸控電極104由上側至下側則依序以標號1041、1042、1043、1044、1045、1046、1047、1048，而本實施例中最上側的第二觸控電極1041對應於最上側直行L中的八個第一觸控電極1061，且第二觸控電極1041位於第一觸控電極1061的上側，上側第二個第二觸控電極1042對應於第二個直行L中的八個第一觸控電極1062，且位於相鄰的第一觸控電極1062所排列的直行L與第一觸控電極1061所排列的直行L之間，以此類推，亦即第二觸控電極1041、1042、1043、1044、1045、1046、1047、1048分別對應於第一觸控電極1061、1062、1063、1064、1065、1066、1067、1068。本實施例的各第一觸控電極106分別連接於一條延伸導線110，各第二觸控電極104分別連接於一條延伸導線109，藉此，第一觸控電極106與第二觸控電極104可經由延伸導線110、109而電連接至位於邊框區A2的周邊走線。延伸導線109、110由第一導電層120所構成，由觸控區A1延伸至邊框區A2，且各延伸導線109、110分別連接於觸控電極（第二觸控電極104與第一觸控電極106）之其中一者。需注意的是，延伸導線109、110延伸至邊框區A2之部分係設於邊框層122上，亦即第一導電層120位於邊框區A2的部分會部分覆蓋邊框層122。第一導電層120的材料舉例為氧化銦錫(indium tin oxide，ITO)、氧化銦鋅(indium zinc oxide，IZO)、氧化鎘錫(cadmium tin oxide，CTO)、氧化鋁鋅(aluminum zinc oxide，AZO)、氧化銦錫鋅(indium tin zinc oxide，ITZO)、氧化鋅(zinc oxide)、氧化鎘(cadmium oxide，CdO)、氧化鉿(hafnium oxide，HfO)、氧化銦鎵鋅(indium gallium zinc oxide，InGaZnO)、氧化銦鎵鋅鎂(indium gallium zinc magnesium oxide，InGaZnMgO)、氧化銦鎵鎂(indium gallium magnesium oxide，InGaMgO)或氧化銦鎵鋁(indium gallium aluminum oxide，InGaAlO)，或是金屬網格、金屬氧化物透明導電材料與薄金屬層堆疊之多層材料、奈米導電材料例如奈米銀絲，或奈米碳管 或其他適合之透明導電材料，但不以此為限。Since the touch panel 100 of the present embodiment is an OLS touch panel, the touch component is mainly composed of a single layer of the first conductive layer 120, that is, the touch area A1 of the upper surface 102a of the substrate 102 is used to form a touch. The primary conductive material of the control element comprises only one layer of the first conductive layer 120. The OLS touch panel of the present embodiment is exemplified by a mutual-capacitive touch panel, but is not limited thereto. In a modified embodiment, the present invention can also be applied to a self-capacitive touch panel, and in other implementations. For example, the touch area A1 may also include a plurality of layers of conductive material to form a touch element. As shown in the figure, the first conductive layer 120 is disposed on the upper surface 102b of the substrate 102 opposite to the touch surface, and is composed of a transparent conductive material. The first conductive layer 120 includes a plurality of touch electrodes disposed at least in the touch area A1 and a plurality of extended conductive lines 109, 110 extending from the touch area A1 to the frame area A2. The touch electrodes can be divided into a first touch electrode 106 and a second touch electrode 104. The first touch electrode 106 is used as a driving electrode, and the touch electrode 104 is used as a receiving electrode. In the other embodiments of the present invention, the first touch electrodes 106 can be used as the receiving electrodes, and the touch electrodes 104 can be used as the driving electrodes to perform touch detection. The first touch electrodes 106 of the present embodiment are arranged in a straight line L along a first direction X every eight groups, and the straight lines L are arranged side by side along the second direction Y. It should be noted that this For example, the total number of the first touch electrodes 106 of the touch panel 100, the number of the straight lines L, and the number of the first touch electrodes 106 in each of the lines L are the same. It should be changed according to actual needs. On the other hand, each of the second touch electrodes 104 corresponds to a plurality of first touch electrodes 106 located in the same straight line L, and is located between one side of the straight line L or the adjacent straight line L, respectively. For example, in the embodiment, the first touch electrodes 106 are arranged in a total of eight straight rows L, and the first touch electrodes 106 in the first straight line L on the upper side are denoted by reference numeral 1061, and the first one in the second straight line L The touch electrode 106 is denoted by reference numeral 1062, and so on. The first touch electrode 106 in the straight line L of the lowermost side is denoted by reference numeral 1068. On the other hand, the eight second touch electrodes 104 of the embodiment are from the upper side. The lowermost side is sequentially labeled with numbers 1041, 1042, 1043, 1044, 1045, 1046, 1047, 1048, and the uppermost second touch electrode 1041 in this embodiment corresponds to eight of the uppermost straight rows L. The touch electrode 1061 is located on the upper side of the first touch electrode 1061, and the second second touch electrode 1042 on the upper side corresponds to the eight first touch electrodes 1062 in the second straight line L. And between the straight line L arranged by the adjacent first touch electrodes 1062 and the straight line L arranged by the first touch electrodes 1061, and so on, that is, the second touch electrodes 1041, 1042, 1043, 1044, 1045, 1046, 1047, and 1048 correspond to the first touch electrodes 1061, 1062, 1063, 1064, 1065, and 106, respectively. 6, 1067, 1068. Each of the first touch electrodes 106 is connected to one of the extension wires 110, and each of the second touch electrodes 104 is connected to one of the extension wires 109. The first touch electrode 106 and the second touch electrode 104 are connected to each other. It can be electrically connected to the peripheral traces located in the bezel area A2 via the extension wires 110, 109. The extension wires 109 and 110 are formed by the first conductive layer 120, and extend from the touch area A1 to the frame area A2, and the extension wires 109 and 110 are respectively connected to the touch electrodes (the second touch electrode 104 and the first touch). One of the electrodes 106). It should be noted that the portion of the extension wire 109, 110 extending to the frame area A2 is disposed on the frame layer 122, that is, the portion of the first conductive layer 120 located in the frame area A2 partially covers the frame layer 122. The material of the first conductive layer 120 is exemplified by indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), and aluminum zinc oxide (aluminum zinc oxide). AZO), indium tin zinc oxide (ITZO), zinc oxide, cadmium oxide (CdO), hafnium oxide (HfO), indium gallium zinc oxide , InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum oxide (InGaAlO), or metal mesh The metal oxide transparent conductive material and the thin metal layer stacked multi-layer material, the nano conductive material such as nano silver wire, or the carbon nanotube or other suitable transparent conductive material, but not limited thereto.
觸控面板100之絕緣層124設於邊框區A2，其覆蓋了邊框層122以及設於邊框區A2之部分第一導電層120（即延伸至邊框區A2的延伸導線109、110），其中本實施例之絕緣層124與邊框層122於基板102表面的覆蓋範圍約略相等，但不以此為限。此外，絕緣層124另包括複數個接觸孔124a，分別曝露出設於其下側且位於絕緣層124與邊框層122之間的延伸導線109、110。接觸孔124a中填設有第二導電層134，以於各接觸孔124a中分別形成一接觸元件108、112。本實施例之絕緣層124舉例為透明絕緣層，其材料可為無機絕緣材料或有機絕緣材料，例如二氧化矽（SiO2）、氮化矽（SiNx）或氮氧化矽（SiOxNy），但不以此為限。然而，在其他變化實施例中，絕緣層124的材料也可以為有色油墨材料，其材料與顏色可以相同於邊框層122或不同於邊框層122。例如，當絕緣層124的材料與顏色相同於邊框層122時，絕緣層124可當作第二層邊框層以進一步提供遮蔽其上側電子元件或走線之功用；另一方面，也可以設計使絕緣層124之油墨材料顏色不相同於邊框層122，並使邊框層122表面具有孔洞，以曝露出絕緣層124，藉以使觸控面板100的表面在邊框區A2具有圖案變化，相關設計請參考後續本發明第二實施例及第3圖之敘述。再者，本實施例之第二導電層134包括導電漿料，其較佳為阻值低之印刷性金屬導電材料，例如印刷銀漿，但不以此為限，例如第二導電層134也可以是印刷碳漿或其他具導電性之材料。The insulating layer 124 of the touch panel 100 is disposed in the frame area A2, and covers the frame layer 122 and a portion of the first conductive layer 120 disposed on the frame area A2 (ie, the extended wires 109 and 110 extending to the frame area A2). The coverage of the insulating layer 124 and the frame layer 122 of the embodiment on the surface of the substrate 102 is approximately equal, but not limited thereto. In addition, the insulating layer 124 further includes a plurality of contact holes 124a exposing the extended wires 109, 110 disposed on the lower side thereof between the insulating layer 124 and the bezel layer 122, respectively. A second conductive layer 134 is filled in the contact hole 124a to form a contact element 108, 112 in each contact hole 124a. The insulating layer 124 of this embodiment is exemplified by a transparent insulating layer, and the material thereof may be an inorganic insulating material or an organic insulating material, such as cerium oxide (SiO2), tantalum nitride (SiNx) or cerium oxynitride (SiOxNy), but not This is limited. However, in other variant embodiments, the material of the insulating layer 124 may also be a colored ink material, which may be the same material or color as the bezel layer 122 or different from the bezel layer 122. For example, when the material and color of the insulating layer 124 are the same as the bezel layer 122, the insulating layer 124 can be used as a second layer of the bezel layer to further provide the function of shielding the upper electronic component or the trace; on the other hand, it can also be designed to The color of the ink material of the insulating layer 124 is different from that of the frame layer 122, and the surface of the frame layer 122 has holes to expose the insulating layer 124, so that the surface of the touch panel 100 has a pattern change in the frame area A2. Subsequent to the description of the second embodiment and the third drawing of the present invention. Furthermore, the second conductive layer 134 of the present embodiment includes a conductive paste, which is preferably a printed metal conductive material having a low resistance, such as a printed silver paste, but not limited thereto, for example, the second conductive layer 134 It can be a printed carbon paste or other electrically conductive material.
觸控面板100之第三導電層128設於絕緣層124表面且主要位於邊框區A2，第三導電層128包括複數條周邊走線，分別電連接於觸控電極（第二觸控電極104與第一觸控電極106）之至少其中一者，並且至少有一部分的周邊走線係藉由接觸元件108、112而電連接於觸控電極。第三導電層128較佳由阻值低之材料所構成，例如為一金屬層，其材料舉例為鋁、銅、銀、鉻或上述材料之組合，但不以此為限，任何適合製作導線之材料皆可為第三導電層128之材料。需注意的是，第三導電層128之材料的電阻值較佳低於第一導電層120之材料的電阻值。本實施例之周邊走線係分別藉由一個接觸元件180、112而電連接於對應之觸控電極。再者，本實施例之周邊走線包括複數條第一周邊走線T與複數條第二周邊走線R，其中各第一周邊走線T分別電連接於複數條延伸導線110並藉由延伸導線110而同時電連接於多個第一觸控電極106，以使同一條第一周邊走線T所電連接之所有第一觸控電極106互相並聯。如第1圖所示，電連接於最左側之第一觸控電極1061、1062、1063、1064、1065、1066、1067、1068的第一周邊走線T以標號T1表示，電連接於左側第二個第一觸控電極1061、1062、1063、1064、1065、1066、1067、1068的第一周邊走線T以標號T2表示，以此類推，所以第一周邊走線T1、T2、T3、T4、T5、T6、T7、T8分別同時電連接於複數個位於不同直行L中的第一觸控電極1061、1062、1063、1064、1065、1066、1067、1068。進一步詳細言之，以第一周邊走線T1與最上側直行L中最左側的第一觸控電極1061為例，第一觸控電極1061係藉由第一導電層120構成的延伸導線110與接觸元件108而電連接於第三導電層128所構成的第一周邊走線T1，且上側第二個直行L至第八個直行L中最左側的第一觸控電極1062、1063、1064、1065、1066、1067、1068也都分別藉由所連接的延伸導線110與對應的接觸元件108而電連接於第一周邊走線T1，因此第一周邊走線T1藉由設置於第一導電層120與第三導電層128之間的數個接觸元件108而同時對應並電連接於各直行L中最左側的第一觸控電極1061、1062、1063、1064、1065、1066、1067、1068，並使上述第一觸控電極互相並聯。再者，第二周邊走線R分別對應且電連接於一個第二觸控電極104，例如第二周邊走線R1、R2、R3、R4、R5、R6、R7、R8分別電連接且對應於第二觸控電極1041、1042、1043、1044、1045、1046、1047、1048，其可以藉由接觸元件112以及由第一導電層120所構成的延伸導線109而電連接各第二觸控電極1041、1042、1043、1044、1045、1046、1047、1048。值得注意的是，本發明延伸導線109、110與第一周邊導線T、第二周邊導線R在邊框區A2垂直於基底102表面的方向上（即第2圖所示之第三方向Z）會互相跨越而部分重疊，如第2圖所示，延伸導線110同時與複數條第一周邊走線T1、T2、T3、T4以及第二周邊走線R2、R4、R6、R8部分重疊，因為延伸導線109、110與周邊走線係分別由第一導電層120與第三導電層128所構成，因此交錯設置的延伸導線109、110與周邊走線並不會互相接觸而發生短路，而是藉由接觸元件108、112而電連接所對應之走線，如此可以大幅節省邊框區A2的面積。The third conductive layer 128 of the touch panel 100 is disposed on the surface of the insulating layer 124 and is mainly located in the frame area A2. The third conductive layer 128 includes a plurality of peripheral traces electrically connected to the touch electrodes (the second touch electrodes 104 and At least one of the first touch electrodes 106), and at least a portion of the peripheral traces are electrically connected to the touch electrodes by the contact elements 108, 112. The third conductive layer 128 is preferably made of a material having a low resistance, such as a metal layer. The material is exemplified by aluminum, copper, silver, chromium or a combination of the above materials, but not limited thereto. The material may be the material of the third conductive layer 128. It should be noted that the resistance value of the material of the third conductive layer 128 is preferably lower than the resistance value of the material of the first conductive layer 120. The peripheral traces of this embodiment are electrically connected to corresponding touch electrodes by a contact element 180, 112, respectively. Furthermore, the peripheral trace of the embodiment includes a plurality of first peripheral traces T and a plurality of second peripheral traces R, wherein each of the first peripheral traces T is electrically connected to the plurality of extended traces 110 and extended by The wires 110 are electrically connected to the plurality of first touch electrodes 106 at the same time so that all the first touch electrodes 106 electrically connected to the same first peripheral trace T are connected in parallel with each other. As shown in FIG. 1 , the first peripheral trace T electrically connected to the leftmost first touch electrodes 1061 , 1062 , 1063 , 1064 , 1065 , 1066 , 1067 , 1068 is denoted by the symbol T1 and electrically connected to the left side. The first peripheral traces T of the two first touch electrodes 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1068 are denoted by the symbol T2, and so on, so the first peripheral traces T1, T2, T3, T4, T5, T6, T7, and T8 are simultaneously electrically connected to a plurality of first touch electrodes 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1068 located in different straight rows L, respectively. For example, the first touch electrode 1061 is an extension conductor 110 formed by the first conductive layer 120 and the first touch electrode 1061 of the uppermost left row L is taken as an example. The contact element 108 is electrically connected to the first peripheral trace T1 formed by the third conductive layer 128, and the leftmost first touch electrodes 1062, 1063, 1064 of the upper second straight line L to the eighth straight line L, 1065, 1066, 1067, and 1068 are also electrically connected to the first peripheral trace T1 by the connected extension wires 110 and the corresponding contact elements 108, respectively. Therefore, the first peripheral trace T1 is disposed on the first conductive layer. The plurality of contact elements 108 between the 120 and the third conductive layer 128 are simultaneously and electrically connected to the leftmost first touch electrodes 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1068 of each of the straight rows L, And the first touch electrodes are connected in parallel with each other. Furthermore, the second peripheral traces R are respectively correspondingly and electrically connected to one second touch electrode 104. For example, the second peripheral traces R1, R2, R3, R4, R5, R6, R7, R8 are electrically connected and correspond to The second touch electrodes 1041, 1042, 1043, 1044, 1045, 1046, 1047, and 1048 can be electrically connected to the second touch electrodes by the contact elements 112 and the extension wires 109 formed by the first conductive layer 120. 1041, 1042, 1043, 1044, 1045, 1046, 1047, 1048. It should be noted that the extension wires 109, 110 of the present invention and the first peripheral wires T and the second peripheral wires R are in a direction perpendicular to the surface of the substrate 102 in the frame region A2 (ie, the third direction Z shown in FIG. 2). Crossing and partially overlapping each other, as shown in FIG. 2, the extension wire 110 partially overlaps the plurality of first peripheral traces T1, T2, T3, T4 and the second peripheral traces R2, R4, R6, R8 at the same time because of the extension The wires 109, 110 and the peripheral traces are respectively formed by the first conductive layer 120 and the third conductive layer 128, so that the staggered extension wires 109, 110 and the peripheral traces do not contact each other and short-circuit, but borrow The corresponding traces are electrically connected by the contact elements 108, 112, which can greatly reduce the area of the bezel area A2.
觸控面板100另可選擇性地包括保護層126覆蓋第三導電層128之表面，以提供保護第三導電層128之功能。保護層126可以為無機絕緣層或有機絕緣層。舉例而言，保護層126可以印刷方式形成於邊框區A2。然而，在變化實施例中，保護層126也可全面形成於基板102的上表面102b，同時覆蓋邊框區A2與觸控區A1以保護第三導電層128與觸控區A1的觸控元件。再者，保護層126在靠近基板102外緣的部分可包括複數個開孔126a，而觸控面板100可另包括導電膠層130與電路板132（未示於第1圖），導電膠層130之一部分可設於開孔126a中，用來電連接電路板132與第三導電層128所構成之周邊走線，以進一步使觸控元件所感測之觸控訊號可以經由周邊走線、導電膠層130與電路板132而輸出至外部處理單元。舉例而言，導電膠層130可以為異方性導電膠，電路板132可以為軟性印刷電路板，但不以此為限。再者，觸控面板100可選擇性地另包括一強化膠層136，設於基板102之上表面102b的外緣，可以用來進一步固定電路板132。The touch panel 100 can further include a protective layer 126 covering the surface of the third conductive layer 128 to provide a function of protecting the third conductive layer 128. The protective layer 126 may be an inorganic insulating layer or an organic insulating layer. For example, the protective layer 126 may be formed in a frame area A2 in a printed manner. However, in a variant embodiment, the protective layer 126 can also be formed on the upper surface 102b of the substrate 102 while covering the frame area A2 and the touch area A1 to protect the touch elements of the third conductive layer 128 and the touch area A1. In addition, the protective layer 126 may include a plurality of openings 126a in a portion close to the outer edge of the substrate 102, and the touch panel 100 may further include a conductive adhesive layer 130 and a circuit board 132 (not shown in FIG. 1). A portion of the 130 can be disposed in the opening 126a for electrically connecting the peripheral traces formed by the circuit board 132 and the third conductive layer 128, so as to further enable the touch signals sensed by the touch component to pass through the peripheral traces and conductive adhesive. Layer 130 and circuit board 132 are output to an external processing unit. For example, the conductive adhesive layer 130 may be an anisotropic conductive adhesive, and the circuit board 132 may be a flexible printed circuit board, but is not limited thereto. Moreover, the touch panel 100 can optionally further include a reinforcing adhesive layer 136 disposed on the outer edge of the upper surface 102b of the substrate 102 for further fixing the circuit board 132.
本發明之觸控面板並不以上述實施例為限。下文將繼續揭示本發明之其它實施例，然為了簡化說明並突顯各實施例或變化形之間的差異，下文中使用相同標號標注相同元件，並不再對重覆部分作贅述。The touch panel of the present invention is not limited to the above embodiment. The other embodiments of the present invention will be further described in the following, and the same reference numerals will be used to refer to the same elements, and the repeated parts will not be described again.
請參考第3圖，第3圖為本發明觸控面板之第二實施例的俯視示意圖。本實施例與第1實施例的不同處在於邊框層122具有至少一圖案開孔122a，而絕緣層124包括油墨材料，其顏色相異於邊框層122之顏色，並且，圖案開孔122a曝露出了設於邊框層122相反於基板102一側的絕緣層124，使得觸控面可以由圖案開孔122a看到具有特定顏色的絕緣層124。舉例而言，圖案開孔122a可以具有商標圖案之外形，並藉由設計絕緣層124之顏色而在觸控面突顯出商品的商標圖案。因此，本實施例之絕緣層124可以視為商標油墨層。在變化實施例中，圖案開孔122a也可以依需要而具有各種圖案並曝露出彩色的絕緣層124，以使觸控面板100表面更具有變化性。Please refer to FIG. 3 , which is a top plan view of a second embodiment of the touch panel of the present invention. The difference between this embodiment and the first embodiment is that the frame layer 122 has at least one pattern opening 122a, and the insulating layer 124 comprises an ink material, the color of which is different from the color of the frame layer 122, and the pattern opening 122a is exposed. The insulating layer 124 is disposed on the side of the frame layer 122 opposite to the substrate 102, so that the touch surface can be seen by the pattern opening 122a as the insulating layer 124 having a specific color. For example, the pattern opening 122a may have a logo pattern shape, and the trademark pattern of the product is highlighted on the touch surface by designing the color of the insulating layer 124. Therefore, the insulating layer 124 of the present embodiment can be regarded as a trademark ink layer. In a variant embodiment, the pattern openings 122a may also have various patterns and expose the colored insulating layer 124 as needed to make the surface of the touch panel 100 more versatile.
根據本發明，第一導電層同時構成觸控電極與延伸導線，且延伸導線係由觸控區延伸至邊框區，再藉由設於周邊走線與延伸導線之間的接觸元件而使觸控訊號可以由觸控電極經由延伸導線、接觸元件及周邊走線而傳遞至外部處理單元。上述周邊走線、延伸導線以及接觸元件的設計可以使一條周邊走線同時電連接於複數個延伸導線與觸控電極，亦即使複數個觸控電極互相並聯，且因為延伸導線與周邊走線係由不同的導電層所構成，因此在垂直於基板表面的方向（第2圖所示之第三方向Z）上可以互相跨越重疊但不影響彼此的走線設計，能有效節省走線空間，且接觸元件的設計位置與走線的繞線設計也具有較大的彈性。再者，接觸元件皆設置於邊框層相反於基板的一側上，因此接觸元件係被邊框層遮蔽而不會曝露於顯示面上，避免影響觸控面板的外觀視覺效果，能解決習知技術中接觸洞被曝露而必須耗費成本進行膜層色差比對或調色以避免視效不佳之問題。另一方面，本發明第二導電層可使用具有低阻值之印刷導電漿料作為接觸元件，例如銀漿，以進一步提高電性表現。因此，本發明之觸控面板結構可以同時降低製程成本，也可改善邊框區走線設計與外觀問題。另外，本發明進一步可利用油墨材料當作絕緣層以進一步提供遮蔽其上側電子元件或走線之功用；另一方面，也可以設計使絕緣層之油墨材料顏色不相同於邊框層，並使邊框層具有至少一圖案開孔，以曝露出絕緣層，如此整合絕緣層與油墨材料，可減少需增加至少一道油墨印刷的程序，簡化結構，但同時可以讓觸控面板的表面在邊框區具有圖案變化。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。According to the present invention, the first conductive layer simultaneously constitutes the touch electrode and the extended wire, and the extended wire extends from the touch area to the frame area, and the touch is made by the contact element disposed between the peripheral trace and the extended wire. The signal can be transmitted to the external processing unit by the touch electrodes via the extension wires, the contact elements, and the peripheral traces. The peripheral traces, the extension wires and the contact elements are designed such that one peripheral trace is electrically connected to the plurality of extension wires and the touch electrodes at the same time, even if the plurality of touch electrodes are connected in parallel, and because the extension wires and the peripheral traces are It is composed of different conductive layers, so that the routing design which can overlap each other but does not affect each other in the direction perpendicular to the surface of the substrate (the third direction Z shown in FIG. 2) can effectively save the wiring space, and The design position of the contact elements and the winding design of the traces also have greater flexibility. Moreover, the contact elements are disposed on a side of the frame layer opposite to the substrate, so that the contact elements are shielded by the frame layer without being exposed on the display surface, thereby avoiding affecting the visual effect of the touch panel, and solving the conventional technology. The contact hole is exposed and it is necessary to cost the film color difference ratio or color to avoid the problem of poor visual effect. On the other hand, the second conductive layer of the present invention can use a printed conductive paste having a low resistance as a contact member such as a silver paste to further improve electrical performance. Therefore, the touch panel structure of the present invention can simultaneously reduce the process cost, and can also improve the design and appearance of the border area. In addition, the present invention may further utilize an ink material as an insulating layer to further provide a function of shielding the upper electronic component or the trace; on the other hand, the ink material of the insulating layer may be designed to have a color different from the bezel layer and the bezel. The layer has at least one patterned opening to expose the insulating layer, thus integrating the insulating layer and the ink material, thereby reducing the need to add at least one ink printing process, simplifying the structure, but at the same time allowing the surface of the touch panel to have a pattern in the frame area Variety. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
100 觸控面板 102 基板 102a 下表面 102b 上表面 104、1041、1042、1043、1044、1045、1046、1047、1048 第二觸控電極 106、1061、1062、1063、1064、1065、1066、1067、1068 第一觸控電極 108、112 接觸元件 109、110 延伸導線 120 第一導電層 122 邊框層 122a 圖案開孔 124 絕緣層 124a 接觸孔 126 保護層 126a 開孔 128 第三導電層 130 導電膠層 132 電路板 134 第二導電層 136 強化膠層 A1 觸控區 A2 邊框區 L 直行 R、R1、R2、R3、R4、R5、R6、R7、R8 第二周邊走線 T、T1、T2、T3、T4、T5、T6、T7、T8 第一周邊走線 X 第一方向 Y 第二方向 Z 第三方向100 touch panel 102 substrate 102a lower surface 102b upper surface 104, 1041, 1042, 1043, 1044, 1045, 1046, 1047, 1048 second touch electrodes 106, 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1068 first touch electrodes 108, 112 contact elements 109, 110 extension wires 120 first conductive layer 122 bezel layer 122a pattern openings 124 insulation layer 124a contact holes 126 protective layer 126a opening 128 third conductive layer 130 conductive adhesive layer 132 circuit board 134 second conductive layer 136 reinforced adhesive layer A1 touch area A2 border area L straight line R, R1, R2, R3, R4, R5, R6, R7, R8 Second peripheral traces T, T1, T2, T3, T4, T5, T6, T7, T8 The first traces surrounding the first direction X Y Z a third direction, the second direction
第1圖為本發明觸控面板之第一實施例的俯視示意圖。 第2圖為第1圖所示觸控面板的部分剖面示意圖。 第3圖為本發明觸控面板之第二實施例的俯視示意圖。FIG. 1 is a top plan view of a first embodiment of a touch panel of the present invention. 2 is a partial cross-sectional view of the touch panel shown in FIG. 1. FIG. 3 is a top plan view of a second embodiment of the touch panel of the present invention.
100 觸控面板 102 基板 102a 下表面 102b 上表面 106、1068 第一觸控電極 108 接觸元件 110 延伸導線 120 第一導電層 122 邊框層 124 絕緣層 124a 接觸孔 126 保護層 126a 開孔 128 第三導電層 130 導電膠層 132 電路板 134 第二導電層 136 強化膠層 A1 觸控區 A2 邊框區 R2、R4、R6、R8 第二周邊走線 T1、T2、T3、T4 第一周邊走線 Z 第三方向100 Touch panel 102 Substrate 102a Lower surface 102b Upper surface 106, 1068 First touch electrode 108 Contact element 110 Extension wire 120 First conductive layer 122 Border layer 124 Insulation layer 124a Contact hole 126 Protective layer 126a Opening 128 Third conductive layer 130 Conductive adhesive layer 132 Circuit board 134 Second conductive layer 136 Strengthening adhesive layer A1 Touch area A2 Border area R2, R4, R6, R8 Second peripheral trace T1, T2, T3, T4 First perimeter Trace Z third direction
Claims (17)
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| CN102736777A (en) * | 2011-04-12 | 2012-10-17 | 乐金显示有限公司 | Touch panel and method for fabricating the same |
| TWM478870U (en) * | 2013-11-29 | 2014-05-21 | Wintek Corp | Touch panel |
| TWM484145U (en) * | 2012-12-27 | 2014-08-11 | Tpk Touch Solutions Inc | Touch panel |
| TW201512958A (en) * | 2013-09-25 | 2015-04-01 | Dongwoo Fine Chem Co Ltd | Touch sensing electrode and touch screen panel |
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| CN102736777A (en) * | 2011-04-12 | 2012-10-17 | 乐金显示有限公司 | Touch panel and method for fabricating the same |
| TWM484145U (en) * | 2012-12-27 | 2014-08-11 | Tpk Touch Solutions Inc | Touch panel |
| TW201512958A (en) * | 2013-09-25 | 2015-04-01 | Dongwoo Fine Chem Co Ltd | Touch sensing electrode and touch screen panel |
| TWM478870U (en) * | 2013-11-29 | 2014-05-21 | Wintek Corp | Touch panel |
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