TWI509491B - Touch panel - Google Patents
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- TWI509491B TWI509491B TW102126320A TW102126320A TWI509491B TW I509491 B TWI509491 B TW I509491B TW 102126320 A TW102126320 A TW 102126320A TW 102126320 A TW102126320 A TW 102126320A TW I509491 B TWI509491 B TW I509491B
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Description
本申請是有關於一種觸控面板,且特別是有關於一種電容式觸控面板。The present application relates to a touch panel, and more particularly to a capacitive touch panel.
近年來,隨著資訊技術、無線行動通訊和資訊家電的快速發展與應用,為了達到更便利、體積更輕巧化以及更人性化的目的,許多資訊產品已由傳統之鍵盤或滑鼠等輸入裝置,轉變為使用觸控面板(touch panel)作為輸入裝置。觸控面板依照感測形式的不同大致上可區分為電阻式觸控面板、電容式觸控面板、光學式觸控面板、聲波式觸控面板以及電磁式觸控面板。由於電容式觸控面板相較於其他類型的觸控面板具有反應時間快、可靠度佳以及解析度高(high definition)等優點,因此被廣泛的應用於各類手持電子裝置上。In recent years, with the rapid development and application of information technology, wireless mobile communication and information appliances, many information products have been input devices such as traditional keyboards or mice for the purpose of being more convenient, lighter and more humanized. It was changed to use a touch panel as an input device. The touch panel can be roughly divided into a resistive touch panel, a capacitive touch panel, an optical touch panel, an acoustic wave touch panel, and an electromagnetic touch panel according to different sensing forms. Since capacitive touch panels have advantages such as fast response time, good reliability, and high definition compared with other types of touch panels, they are widely used in various types of handheld electronic devices.
電容式觸控面板藉由相互交錯的多個電極線(例如是驅動線與感測線)來構成感測陣列,以達成面的感測。當使用者以手指觸碰觸控面板時,觸控面板會依據感測陣列上的電容變化來判斷手指接觸的位置。然而,已知的電容式觸控面板在電極線的相交 處容易產生寄生電容(parasitic capacitance),而不利於觸控位置的計算,導致感測靈敏度不佳。因此,為了降低寄生電容的影響,已知設計通常會選擇增加在相交位置上的電極線之間的距離,例如是增加電極線之間的絕緣材的厚度,進而造成製作成本的負擔並增加觸控面板的厚度。相對地,若藉由減少電極線在相交處的線寬來降低寄生電容,則容易在線寬變化的轉折處發生斷線的問題,影響觸控面板的製程良率與可靠度。The capacitive touch panel constitutes a sensing array by a plurality of electrode lines (for example, driving lines and sensing lines) interlaced to each other to achieve surface sensing. When the user touches the touch panel with a finger, the touch panel determines the position of the finger contact according to the change in capacitance on the sensing array. However, known capacitive touch panels intersect at the electrode lines It is easy to generate parasitic capacitance, which is not conducive to the calculation of the touch position, resulting in poor sensing sensitivity. Therefore, in order to reduce the influence of parasitic capacitance, known designs usually choose to increase the distance between the electrode lines at the intersection, for example, increase the thickness of the insulating material between the electrode lines, thereby causing a burden on the manufacturing cost and increasing the touch. The thickness of the control panel. In contrast, if the parasitic capacitance is reduced by reducing the line width of the electrode lines at the intersection, it is easy to break the line at the turning point of the line width change, which affects the process yield and reliability of the touch panel.
本申請提供一種觸控面板,具有良好的製程良率與可靠度。The present application provides a touch panel with good process yield and reliability.
本申請提出的觸控面板包括一第一基材、多個第一電極線以及多個第二電極線。第一電極線並排於第一基材上,並且分別沿一第一方向延伸。各第一電極線包括多個電極墊以及多個第一連接段,任兩相鄰的電極墊透過對應的第一連接段之一相連,並且電極墊的寬度大於第一連接段的寬度,其中各第一連接段具有用以連接電極墊的兩端部以及位在兩端部之間的一中間部,各第一連接段的寬度是由兩端部朝向中間部遞減而呈現頸縮狀,並且各第一連接段的兩端部與相應的電極墊的連接處的轉角為平滑曲面。第二電極線並排於第一基材上,並且分別沿一第二方向延伸,第二方向與第一方向相交。第二電極線電性絕緣於第一電極線,並且各第二電極線在第一基材上的垂直投影與第一電極線的 相應的第一連接段在第一基材上的垂直投影相交,以分別形成一重疊區域。The touch panel proposed in the present application includes a first substrate, a plurality of first electrode lines, and a plurality of second electrode lines. The first electrode lines are juxtaposed on the first substrate and extend in a first direction. Each of the first electrode lines includes a plurality of electrode pads and a plurality of first connection segments, and any two adjacent electrode pads are connected through one of the corresponding first connection segments, and the width of the electrode pads is greater than the width of the first connection segments, wherein Each of the first connecting segments has an end portion for connecting the electrode pads and an intermediate portion between the two end portions, and the width of each of the first connecting portions is tapered from the both end portions toward the intermediate portion, and the neck portion is formed. And the corners of the joints of the two end portions of each of the first connecting segments and the corresponding electrode pads are smooth curved surfaces. The second electrode lines are juxtaposed on the first substrate and extend in a second direction, respectively, and the second direction intersects the first direction. The second electrode line is electrically insulated from the first electrode line, and the vertical projection of each of the second electrode lines on the first substrate and the first electrode line The vertical projections of the respective first connecting segments on the first substrate intersect to form an overlapping region, respectively.
基於上述,由於各第一電極線的各第一連接段的寬度是由連接電極墊的兩端部朝向兩端部之間的中間部遞減而呈現頸縮狀,並且各第一連接段的兩端部與相應的電極墊之間的連接處具有呈現平滑曲面的轉角,可以避免連接處應力集中,進而減少第一連接段從其與相應的電極墊的連接處斷裂的機率。據此,本申請的觸控面板的第一電極線不容易在製作或使用時從第一連接段與相應的電極墊的連接處斷裂,而具有良好的製程良率與可靠度。Based on the above, since the width of each of the first connecting segments of each of the first electrode wires is decreased from the both end portions of the connecting electrode pad toward the intermediate portion between the both end portions, and the neck portions are formed, and The junction between the end and the corresponding electrode pad has a corner that exhibits a smooth curved surface, which avoids stress concentration at the joint, thereby reducing the probability of the first connecting segment breaking from its junction with the corresponding electrode pad. Accordingly, the first electrode line of the touch panel of the present application is not easily broken at the connection between the first connecting segment and the corresponding electrode pad during fabrication or use, and has good process yield and reliability.
為讓本申請的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。The above features and advantages of the present invention will become more apparent from the following description.
100‧‧‧觸控面板100‧‧‧ touch panel
102‧‧‧第一基材102‧‧‧First substrate
104‧‧‧第二基材104‧‧‧Second substrate
106‧‧‧保護層106‧‧‧Protective layer
110‧‧‧第一電極線110‧‧‧First electrode line
112‧‧‧電極墊112‧‧‧electrode pads
114‧‧‧第一連接段114‧‧‧First connection segment
114a‧‧‧兩端部114a‧‧‧ Both ends
114b‧‧‧中間部114b‧‧‧Intermediate
120‧‧‧第二電極線120‧‧‧Second electrode line
122‧‧‧第二連接段122‧‧‧Second connection
130‧‧‧絕緣材130‧‧‧Insulation
C‧‧‧連接處C‧‧‧ Connection
D1‧‧‧第一方向D1‧‧‧ first direction
D2‧‧‧第二方向D2‧‧‧ second direction
L1、L2‧‧‧長度L1, L2‧‧‧ length
R1‧‧‧重疊區域R1‧‧‧ overlapping area
r1、r2‧‧‧曲率半徑R1, r2‧‧‧ radius of curvature
S1‧‧‧第一表面S1‧‧‧ first surface
S2‧‧‧第二表面S2‧‧‧ second surface
W1、W2‧‧‧寬度W1, W2‧‧‧ width
圖1是本申請一實施例的一種觸控面板的示意圖。FIG. 1 is a schematic diagram of a touch panel according to an embodiment of the present application.
圖2為圖1的第一電極線與第二電極線的局部放大圖。FIG. 2 is a partial enlarged view of the first electrode line and the second electrode line of FIG. 1. FIG.
圖3A為圖2的第一連接段的局部放大圖。3A is a partial enlarged view of the first connecting section of FIG. 2.
圖3B為本申請另一實施例的第一連接段的局部放大圖。FIG. 3B is a partial enlarged view of a first connecting section according to another embodiment of the present application.
圖3C為本申請另一實施例的第一連接段的局部放大圖。FIG. 3C is a partial enlarged view of a first connecting section according to another embodiment of the present application.
圖4為本申請另一實施例的第一電極線與第二電極線的局部放大圖。4 is a partial enlarged view of a first electrode line and a second electrode line according to another embodiment of the present application.
圖5A至圖5C為本申請的觸控面板在不同實施例中的剖面 圖。5A to 5C are cross-sections of the touch panel of the present application in different embodiments. Figure.
圖1是本申請一實施例的一種觸控面板的示意圖。為使圖式更為清楚,圖1省略了觸控面板的部分可能存在的膜層或是元件。請參考圖1,在本實施例中,觸控面板100包括第一基材102、多個第一電極線110以及多個第二電極線120。第一電極線110並排於第一基材102上,並且分別沿第一方向D1延伸。各第一電極線110包括多個電極墊112以及多個第一連接段114。任兩相鄰的電極墊112透過對應的第一連接段114之一相連。FIG. 1 is a schematic diagram of a touch panel according to an embodiment of the present application. In order to make the drawings clearer, FIG. 1 omits the layers or components that may exist in portions of the touch panel. Referring to FIG. 1 , in the embodiment, the touch panel 100 includes a first substrate 102 , a plurality of first electrode lines 110 , and a plurality of second electrode lines 120 . The first electrode lines 110 are arranged side by side on the first substrate 102 and extend in the first direction D1, respectively. Each of the first electrode lines 110 includes a plurality of electrode pads 112 and a plurality of first connection segments 114. Any two adjacent electrode pads 112 are connected through one of the corresponding first connecting segments 114.
此外,第二電極線120並排於第一基材102上,並且分別沿第二方向D2延伸,第二方向D2與第一方向D1相交。第二電極線120電性絕緣於第一電極線110,並且沿第二方向D2延伸的第二電極線120與沿第一方向D1延伸第一電極線110相交,以在第一基材102上形成感測陣列。本實施例的第一電極線110與第二電極線120例如是驅動線與感測線的組合,且材質可以是銦錫氧化物(Indium Tin Oxide,ITO)或銦鋅氧化物(Indium Zinc Oxide,IZO)等透明導電物質,但本申請並不限制第一電極線110與第二電極線120的種類與材質。Further, the second electrode lines 120 are juxtaposed on the first substrate 102 and extend in the second direction D2, respectively, and the second direction D2 intersects the first direction D1. The second electrode line 120 is electrically insulated from the first electrode line 110, and the second electrode line 120 extending in the second direction D2 intersects the first electrode line 110 extending along the first direction D1 to be on the first substrate 102. A sensing array is formed. The first electrode line 110 and the second electrode line 120 in this embodiment are, for example, a combination of a driving line and a sensing line, and the material may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (Indium Tin Oxide, A transparent conductive material such as IZO), but the type and material of the first electrode line 110 and the second electrode line 120 are not limited in the present application.
圖2為圖1的第一電極線與第二電極線的局部放大圖。請參考圖1與圖2,在本實施例中,由於第二電極線120與第一電極線110相交,因此各第二電極線120在第一基材102上的垂直 投影會與各第一電極線110的相應的第一連接段114在第一基材102上的垂直投影相交,以分別形成重疊區域R1。若第一電極線110與第二電極線120之間的重疊區域R1縮小,可有效降低第一電極線110與第二電極線120之間的寄生電容。FIG. 2 is a partial enlarged view of the first electrode line and the second electrode line of FIG. 1. FIG. Referring to FIG. 1 and FIG. 2 , in the embodiment, since the second electrode line 120 intersects the first electrode line 110 , the vertical direction of each second electrode line 120 on the first substrate 102 is The projection intersects the vertical projection of the respective first connecting segments 114 of the respective first electrode lines 110 on the first substrate 102 to form overlapping regions R1, respectively. If the overlapping region R1 between the first electrode line 110 and the second electrode line 120 is reduced, the parasitic capacitance between the first electrode line 110 and the second electrode line 120 can be effectively reduced.
在本實施例中,首先藉由縮小各第一電極線110的第一連接段114的寬度,來降低重疊區域R1在第二方向D2上的長度。請參考圖2,本實施例的各第一電極線110的電極墊112的寬度W1大於第一連接段114的寬度W2。在此,電極墊112的寬度W1是指電極墊112在第二方向D2上的長度,而第一連接段114的寬度W2是指第一連接段114在第二方向D2上的長度。此時,由於第一連接段114的寬度W2變小,使得重疊區域R1在第二方向D2上的長度L1變小,進而降低重疊區域R1的面積,以降低第一電極線110與第二電極線120在相交處產生的寄生電容。In the present embodiment, the length of the overlap region R1 in the second direction D2 is first reduced by reducing the width of the first connection segment 114 of each of the first electrode lines 110. Referring to FIG. 2 , the width W1 of the electrode pad 112 of each of the first electrode lines 110 of the embodiment is greater than the width W2 of the first connection segment 114 . Here, the width W1 of the electrode pad 112 refers to the length of the electrode pad 112 in the second direction D2, and the width W2 of the first connection segment 114 refers to the length of the first connection segment 114 in the second direction D2. At this time, since the width W2 of the first connecting portion 114 becomes smaller, the length L1 of the overlapping region R1 in the second direction D2 becomes smaller, thereby reducing the area of the overlapping region R1 to lower the first electrode line 110 and the second electrode. The parasitic capacitance generated by line 120 at the intersection.
另一方面,在本實施例中,各第一連接段114具有用以連接電極墊112的兩端部114a以及位在兩端部114a之間的中間部114b。各第一連接段114的寬度W2是由兩端部114a朝向中間部114b遞減而呈現頸縮狀。換言之,各第一連接段114在兩端部114a具有一個最大寬度,並且在中間部114b具有一個最小寬度。前述的第一連接段114的寬度W2是指各第一連接段114在兩端部114a產生的最大寬度,而重疊區域R1在第二方向D2上的長度L1是指各第一連接段114在中間部114b產生的最小寬度。因此,當為了降低重疊區域R1的面積而縮小第一連接段114的寬度W2時, 實際上重疊區域R1在第二方向D2上的長度L1會比寬度W2小。On the other hand, in the present embodiment, each of the first connecting sections 114 has both end portions 114a for connecting the electrode pads 112 and an intermediate portion 114b positioned between the both end portions 114a. The width W2 of each of the first connecting sections 114 is tapered by the both end portions 114a toward the intermediate portion 114b. In other words, each of the first connecting sections 114 has a maximum width at both end portions 114a and a minimum width at the intermediate portion 114b. The width W2 of the first connecting segment 114 refers to the maximum width of each of the first connecting segments 114 at the two end portions 114a, and the length L1 of the overlapping region R1 in the second direction D2 means that the first connecting segments 114 are The minimum width produced by the intermediate portion 114b. Therefore, when the width W2 of the first connecting section 114 is reduced in order to reduce the area of the overlapping area R1, Actually, the length L1 of the overlap region R1 in the second direction D2 will be smaller than the width W2.
圖3A為圖2的第一連接段的局部放大圖。請同時參考圖2與圖3A,在本實施例中,各第一連接段114的兩端部114a與相應的電極墊112的連接處C的轉角為平滑曲面,而各第一連接段114的中間部114b的兩側面為平面。由於各第一連接段114的寬度W2是由兩端部114a朝向中間部114b遞減而呈現頸縮狀,並且兩端部114a與相應的電極墊112的連接處C的轉角為平滑曲面,可以在降低第一連接段114的寬度W2的同時,減少第一連接段114從其與相應的電極墊112的連接處C斷裂的機率。上述的連接處C的轉角的平滑曲面例如是曲率半徑為r1的圓弧曲面,但第一連接段114不限於上述的形狀。3A is a partial enlarged view of the first connecting section of FIG. 2. Referring to FIG. 2 and FIG. 3A simultaneously, in the embodiment, the corners of the joint C of the first connecting portion 114 of each of the first connecting segments 114 and the corresponding electrode pads 112 are smooth curved surfaces, and the first connecting segments 114 are Both sides of the intermediate portion 114b are flat. Since the width W2 of each of the first connecting sections 114 is tapered by the both end portions 114a toward the intermediate portion 114b, and the corner of the joint C of the both end portions 114a and the corresponding electrode pads 112 is a smooth curved surface, While reducing the width W2 of the first connecting section 114, the probability that the first connecting section 114 is broken from its junction C with the corresponding electrode pad 112 is reduced. The smooth curved surface of the corner of the joint C described above is, for example, a circular curved surface having a radius of curvature r1, but the first connecting portion 114 is not limited to the above-described shape.
圖3B為本申請另一實施例的第一連接段的局部放大圖。請參考圖3B,在本實施例中,各第一連接段114的兩端部114a與相應的電極墊112的連接處C的轉角為平滑曲面。此外,各第一連接段114的兩端部114a與相應的電極墊112的連接處C的轉角以及中間部114b的兩側面形成曲率半徑為r2的圓弧曲面。由於各第一連接段114呈現頸縮狀,並且連接處C的轉角以及中間部114b的兩側面形成圓弧曲面,可以在降低第一連接段114的寬度W2的同時,減少第一連接段114從其與相應的電極墊112的連接處C斷裂的機率。FIG. 3B is a partial enlarged view of a first connecting section according to another embodiment of the present application. Referring to FIG. 3B, in the embodiment, the corners of the joint C of the first connecting portions 114a of the first connecting segments 114 and the corresponding electrode pads 112 are smooth curved surfaces. Further, a corner of the joint C of the first connecting portion 114 and the corresponding electrode pad 112 and a side surface of the intermediate portion 114b form a circular curved surface having a radius of curvature r2. Since each of the first connecting segments 114 is neck-shaped, and the corners of the joint C and the two sides of the intermediate portion 114b form a circular arc surface, the first connecting portion 114 can be reduced while reducing the width W2 of the first connecting portion 114. The probability of breaking from its junction C with the corresponding electrode pad 112.
圖3C為本申請另一實施例的第一連接段的局部放大圖。請參考圖3C,在本實施例中,各第一連接段114的兩端部114a 與相應的電極墊112的連接處C的轉角為平滑曲面。此外,各中間部114b位於相應的重疊區域R1內,且各中間部114b的相對兩側面為平面。各第一連接段114的兩端部114a與相應的電極墊112的連接處C的轉角形成曲率半徑為r3的圓弧曲面,且曲率半徑為r3的圓弧曲面延伸至重疊區域R1內並連接各中間部114b的相對兩側面。由於各第一連接段114呈現頸縮狀,且連接處C的轉角形成圓弧曲面並延伸至重疊區域R1內,可以在降低第一連接段114的寬度W2的同時,減少第一連接段114從其與相應的電極墊112的連接處C斷裂的機率。除了上述的三種實施例之外,第一連接段114還可以是其他形狀。舉例來說,在其他實施例中,各第一連接段114的兩側面以及連接處C的轉角可以形成橢圓弧曲面或者是拋物線曲面,本申請並不限制第一連接段114的形狀。FIG. 3C is a partial enlarged view of a first connecting section according to another embodiment of the present application. Referring to FIG. 3C, in the embodiment, both end portions 114a of the first connecting segments 114 are provided. The corner of the joint C with the corresponding electrode pad 112 is a smooth curved surface. Further, each intermediate portion 114b is located in the corresponding overlapping region R1, and opposite sides of each intermediate portion 114b are flat. A corner of the joint C of each of the first connecting sections 114 and the corresponding electrode pad 112 forms a circular curved surface having a radius of curvature r3, and a circular curved surface having a radius of curvature r3 extends into the overlapping area R1 and is connected The opposite sides of each intermediate portion 114b. Since each of the first connecting sections 114 is neck-shaped, and the corner of the joint C forms a circular arc surface and extends into the overlapping area R1, the first connecting section 114 can be reduced while reducing the width W2 of the first connecting section 114. The probability of breaking from its junction C with the corresponding electrode pad 112. In addition to the three embodiments described above, the first connecting section 114 can be other shapes. For example, in other embodiments, the two sides of each of the first connecting segments 114 and the corners of the joint C may form an elliptical curved surface or a parabolic curved surface, and the shape of the first connecting portion 114 is not limited herein.
請參考圖2,除了藉由減少第一連接段114的寬度W2而降低重疊區域R1的面積之外,本實施例還可以同時考慮在重疊區域R1在第二方向D2上的長度L1以及重疊區域R1在第一方向D1上的長度L2的關係。在本實施例中,重疊區域R1在第二方向D2上的長度L1小於或等於重疊區域R1在第一方向D1上的長度L2。在此,重疊區域R1在第二方向D2上的長度L1是指第一連接段114在中間部114b產生的最小寬度,而重疊區域R1在第一方向D1上的長度L2是指第二電極線120的寬度。第二電極線120的寬度是指第二電極線120在第一方向D1上的長度。由於本實施例的第二電極線120為條狀電極線,故第二電極線120在第一方 向D1上的長度即是重疊區域R1在第一方向D1上的長度L2。換言之,第一電極線110的第一連接段114與第二電極線120在第一基材102上所形成的重疊區域R1具有沿第二方向D2的長度L1(第一連接段114的最小寬度)以及沿第一方向D1的長度L2(第二電極線120的寬度),且長度L1小於或等於長度L2。Referring to FIG. 2, in addition to reducing the area of the overlap region R1 by reducing the width W2 of the first connection segment 114, the present embodiment can simultaneously consider the length L1 and the overlap region of the overlap region R1 in the second direction D2. The relationship of the length L2 of R1 in the first direction D1. In the present embodiment, the length L1 of the overlap region R1 in the second direction D2 is less than or equal to the length L2 of the overlap region R1 in the first direction D1. Here, the length L1 of the overlap region R1 in the second direction D2 refers to the minimum width of the first connection segment 114 generated at the intermediate portion 114b, and the length L2 of the overlap region R1 in the first direction D1 refers to the second electrode line. The width of 120. The width of the second electrode line 120 refers to the length of the second electrode line 120 in the first direction D1. Since the second electrode line 120 of the embodiment is a strip electrode line, the second electrode line 120 is in the first side. The length on the D1 is the length L2 of the overlap region R1 in the first direction D1. In other words, the overlapping region R1 formed by the first connecting segment 114 of the first electrode line 110 and the second electrode line 120 on the first substrate 102 has a length L1 along the second direction D2 (the minimum width of the first connecting segment 114) And a length L2 along the first direction D1 (the width of the second electrode line 120), and the length L1 is less than or equal to the length L2.
另外,請再參考圖1,在本實施例中,在觸控面板100更包括多個第二連接段122,用以連接第二電極線120,以傳輸訊號。第二連接段122鄰近第一基材102的邊緣,每兩條相鄰的第二電極線120藉由相應的第二連接段122相連。然而,在其他實施例中,每三條或更多相鄰的第二電極線120可以藉由相應的第二連接段122相連。據此,本實施例可以使單一感測區域(未繪示)內對應兩條、三條或三條以上的第二電極線120,有助於降低個別的第二電極線120的寬度。當然,在其他實施例中,每條第二電極線120也可以單獨連接到第二連接段122。In addition, referring to FIG. 1 , in the embodiment, the touch panel 100 further includes a plurality of second connecting segments 122 for connecting the second electrode lines 120 to transmit signals. The second connecting segment 122 is adjacent to the edge of the first substrate 102, and each two adjacent second electrode wires 120 are connected by a corresponding second connecting segment 122. However, in other embodiments, every three or more adjacent second electrode lines 120 may be connected by respective second connection segments 122. Accordingly, the present embodiment can make two, three or more second electrode lines 120 corresponding to a single sensing area (not shown), which helps to reduce the width of the individual second electrode lines 120. Of course, in other embodiments, each of the second electrode lines 120 may also be separately connected to the second connection segment 122.
基於上述,本實施例藉由縮小第一電極線110與第二電極線120的重疊區域R1來降低兩者之間的寄生電容,以提供良好的感測靈敏度,並且同時藉由使呈現頸縮狀的第一連接段114在其與相應的電極墊112的連接處C的轉角為平滑曲線,以避免應力集中,減少第一連接段114從其與相應的電極墊112的連接處C斷裂的機率。換言之,本實施例的觸控面板100的第一電極線110不容易在製作或使用時從第一連接段114與相應的電極墊112的連接處C斷裂。Based on the above, the present embodiment reduces the parasitic capacitance between the two by reducing the overlapping area R1 of the first electrode line 110 and the second electrode line 120 to provide good sensing sensitivity, and at the same time, by presenting the necking The first connecting section 114 has a smooth curve at the corner of its junction with the corresponding electrode pad 112 to avoid stress concentration, reducing the breakage of the first connecting section 114 from its junction C with the corresponding electrode pad 112. Probability. In other words, the first electrode line 110 of the touch panel 100 of the present embodiment is not easily broken from the junction C of the first connection segment 114 and the corresponding electrode pad 112 during fabrication or use.
圖4為本申請另一實施例的第一電極線與第二電極線的局部放大圖。請參考圖2與圖4,在圖2的實施例中,各第一電極線110的任兩相鄰的電極墊112透過對應的第一連接段114之一相連,但在圖4的實施例中,各第一電極線110的任兩相鄰的電極墊112可以透過對應的兩個第一連接段114相連。各第二電極線120在第一基材102上的垂直投影與第一電極線110的相應的第一連接段114在第一基材102上的垂直投影相交並分別形成重疊區域R1,而各第二電極線120與各第一電極線110之間具有兩個重疊區域R1。然而,在其他實施例中,第一電極線110的任兩相鄰的電極墊112可以透過更多的第一連接段114相連,本申請並不以此為限制。4 is a partial enlarged view of a first electrode line and a second electrode line according to another embodiment of the present application. Referring to FIG. 2 and FIG. 4, in the embodiment of FIG. 2, any two adjacent electrode pads 112 of each first electrode line 110 are connected through one of the corresponding first connection segments 114, but in the embodiment of FIG. The two adjacent electrode pads 112 of each of the first electrode lines 110 may be connected through the corresponding two first connection segments 114. The vertical projection of each second electrode line 120 on the first substrate 102 intersects with the vertical projection of the corresponding first connection segment 114 of the first electrode line 110 on the first substrate 102 and forms an overlap region R1, respectively. The second electrode line 120 has two overlapping regions R1 between each of the first electrode lines 110. However, in other embodiments, any two adjacent electrode pads 112 of the first electrode line 110 may be connected through more first connecting segments 114, which is not limited thereto.
圖5A至圖5C為本申請的觸控面板在不同實施例中的剖面圖。前述設計原則可以被應用於各種觸控面板上。下文依序藉由圖5A至圖5C所繪示的幾種觸控面板100可能的剖面結構來進行說明。5A-5C are cross-sectional views of a touch panel of the present application in various embodiments. The aforementioned design principles can be applied to various touch panels. The following is a description of the possible cross-sectional structures of several touch panels 100 illustrated in FIGS. 5A-5C .
首先,請參考圖2與圖5A。圖5A繪示觸控面板100沿圖2之A-A’線的一種可能的剖面結構。在本實施例中,觸控面板100更包括第二基材104,第二基材104配置於第一基材上102,而第一電極線110與第二電極線120分別位於第二基材104的相對兩側。更具體而言,第一電極線110位於第一基材102上,而第二電極線120位於第二基材104上。第二基材104配置於第一基材102上,並且覆蓋第一電極線110。此外,第二基材104上還 可覆蓋有保護層106,以保護第二電極線120。在製作上,可以先分別在第一基材102以及第二基材104上製作第一電極線110以及第二電極線120,再將第一基材102與第二基材104相互貼合,並於第二基材104上披覆保護層106。第一基材102與第二基材104例如是玻璃或PET(Polyethylene Terephthalate,聚對苯二甲酸乙二醇酯)等透光基材,並可藉由光學膠(optically clear adhesive,OCA)互相貼合,但本發明不限制第一基材102與第二基材104的材料與貼合方式。First, please refer to FIG. 2 and FIG. 5A. FIG. 5A illustrates a possible cross-sectional structure of the touch panel 100 along the line A-A' of FIG. 2. In this embodiment, the touch panel 100 further includes a second substrate 104. The second substrate 104 is disposed on the first substrate 102, and the first electrode line 110 and the second electrode line 120 are respectively disposed on the second substrate. The opposite sides of 104. More specifically, the first electrode line 110 is on the first substrate 102 and the second electrode line 120 is on the second substrate 104. The second substrate 104 is disposed on the first substrate 102 and covers the first electrode line 110. In addition, the second substrate 104 is further A protective layer 106 may be covered to protect the second electrode line 120. In the fabrication, the first electrode line 110 and the second electrode line 120 may be formed on the first substrate 102 and the second substrate 104, respectively, and the first substrate 102 and the second substrate 104 may be bonded to each other. The protective layer 106 is coated on the second substrate 104. The first substrate 102 and the second substrate 104 are, for example, light transmissive substrates such as glass or PET (polyethylene terephthalate), and can be mutually etched by optically clear adhesive (OCA). The bonding, but the present invention does not limit the materials and bonding manner of the first substrate 102 and the second substrate 104.
由於本實施例可以如前所述的藉由縮小第一電極線110以及第二電極線120的重疊區域R1來降低兩者之間的寄生電容,在不改變觸控晶片的能力的狀況下,第一電極線110以及第二電極線120之間的距離可以被適當地縮小,也就是第二基材104的厚度可以變薄。如此,可以減少第二基材104的用量,節省製作成本,並且可以使觸控面板100整體具有較小的厚度,以及良好的透光率。Since the embodiment can reduce the parasitic capacitance between the first electrode line 110 and the second electrode line 120 by reducing the overlapping area R1 of the first electrode line 110 and the second electrode line 120 as described above, without changing the capability of the touch wafer, The distance between the first electrode line 110 and the second electrode line 120 may be appropriately reduced, that is, the thickness of the second substrate 104 may be thinned. In this way, the amount of the second substrate 104 can be reduced, the manufacturing cost can be saved, and the touch panel 100 as a whole can have a small thickness and a good light transmittance.
請參考圖2與圖5B。圖5B繪示觸控面板100沿圖2之A-A’線的另一種可能的剖面結構。在本實施例中,第一基材102具有第一表面S1以及相對於第一表面S1的第二表面S2,其中第一電極線110位於第一表面S1上,而第二電極線120位於第二表面S2上。在製作上,例如是以第一基材102作為基底而分別在第一基材102上的第一表面S1與第二表面S2上製作第一電極線110以及第二電極線120。第一基材102例如是玻璃或PET等透光基 材,但本發明不限制第一基材102與第二基材104的材料。Please refer to FIG. 2 and FIG. 5B. FIG. 5B illustrates another possible cross-sectional structure of the touch panel 100 along the line A-A' of FIG. 2. In this embodiment, the first substrate 102 has a first surface S1 and a second surface S2 opposite to the first surface S1, wherein the first electrode line 110 is located on the first surface S1, and the second electrode line 120 is located at the first surface Two surfaces on S2. In the fabrication, for example, the first electrode line 110 and the second electrode line 120 are formed on the first surface S1 and the second surface S2 of the first substrate 102 by using the first substrate 102 as a substrate. The first substrate 102 is, for example, a light-transmitting group such as glass or PET. However, the present invention does not limit the materials of the first substrate 102 and the second substrate 104.
同理,由於本實施例可以如前所述的藉由縮小第一電極線110以及第二電極線120的重疊區域R1來降低兩者之間的寄生電容,在不改變觸控晶片的能力的狀況下,第一電極線110以及第二電極線120之間的距離可以被適當地縮小,也就是降低第一基材102的厚度。如此,可以減少第一基材102的用量,節省製作成本,並且可以使觸控面板100整體具有較小的厚度,以及良好的透光率。Similarly, since the embodiment can reduce the parasitic capacitance between the first electrode line 110 and the second electrode line 120 by reducing the overlapping area R1 of the first electrode line 110 and the second electrode line 120 as described above, without changing the capability of the touch wafer. In the case, the distance between the first electrode line 110 and the second electrode line 120 can be appropriately reduced, that is, the thickness of the first substrate 102 is lowered. In this way, the amount of the first substrate 102 can be reduced, the manufacturing cost can be saved, and the touch panel 100 as a whole can have a small thickness and a good light transmittance.
請參考圖2與圖5C。圖5C繪示觸控面板100沿圖2之B-B’線的再一種可能的剖面結構。在本實施例中,第一基材102具有第一表面S1,第一電極線110與第二電極線120位於第一基材102的第一表面S1上。由於第一電極線110以及第二電極線120需彼此電性絕緣,故第一電極線110與第二電極線120的其中之一需跨過第一電極線110與第二電極線120的其中另一。更具體而言,在本實施例中,第二電極線120對應於第一電極線110的第一連接段114的局部跨過第一電極線110,並且位在第一連接段114的上方,以形成前述重疊區域R1。此外,觸控面板100更包括絕緣材130。絕緣材130位於第一表面S1上並介於第二電極線120與相應的第一電極線110的第一連接段114之間,以隔絕第一電極線110以及第二電極線120。第一基材102例如是玻璃或PET等透光基材,但本發明不限制第一基材102與第二基材104的材料。此外,在其他實施例中,第一電極線110的第一連接段114 也可以跨過第二電極線120,並且位在第二電極線120的上方,本身請不限制兩者的跨接方式。Please refer to FIG. 2 and FIG. 5C. FIG. 5C illustrates still another possible cross-sectional structure of the touch panel 100 along the line B-B' of FIG. 2. In the present embodiment, the first substrate 102 has a first surface S1, and the first electrode line 110 and the second electrode line 120 are located on the first surface S1 of the first substrate 102. Since the first electrode line 110 and the second electrode line 120 are electrically insulated from each other, one of the first electrode line 110 and the second electrode line 120 needs to cross the first electrode line 110 and the second electrode line 120. another. More specifically, in the present embodiment, the second electrode line 120 corresponds to a portion of the first connection segment 114 of the first electrode line 110 across the first electrode line 110 and is located above the first connection segment 114. To form the aforementioned overlap region R1. In addition, the touch panel 100 further includes an insulating material 130. The insulating material 130 is located on the first surface S1 and between the second electrode line 120 and the first connecting portion 114 of the corresponding first electrode line 110 to isolate the first electrode line 110 and the second electrode line 120. The first substrate 102 is, for example, a light-transmitting substrate such as glass or PET, but the present invention does not limit the materials of the first substrate 102 and the second substrate 104. Moreover, in other embodiments, the first connection segment 114 of the first electrode line 110 It is also possible to straddle the second electrode line 120 and be located above the second electrode line 120, and it is not necessary to limit the bridging manner of the two.
同理,由於本實施例可以如前所述的藉由縮小第一電極線110以及第二電極線120的重疊區域R1來降低兩者之間的寄生電容,在不改變觸控晶片的能力的狀況下,第一電極線110以及第二電極線120之間的距離可以被適當地縮小,例如是降低絕緣材130的厚度。如此,可以減少絕緣材130的用量,節省製作成本,並且可以使觸控面板100整體具有較小的厚度,以及良好的透光率。Similarly, since the embodiment can reduce the parasitic capacitance between the first electrode line 110 and the second electrode line 120 by reducing the overlapping area R1 of the first electrode line 110 and the second electrode line 120 as described above, without changing the capability of the touch wafer. In the case, the distance between the first electrode line 110 and the second electrode line 120 can be appropriately reduced, for example, the thickness of the insulating material 130 is lowered. In this way, the amount of the insulating material 130 can be reduced, the manufacturing cost can be saved, and the touch panel 100 as a whole can have a small thickness and a good light transmittance.
雖然前述實施例說明了本申請之觸控面板100的幾種可能的結構,然其並非用以限定本申請。舉例而言,第一電極線110以及第二電極線120的形狀以及佈局並不限於前述實施例的內容。Although the foregoing embodiments illustrate several possible configurations of the touch panel 100 of the present application, it is not intended to limit the application. For example, the shapes and layouts of the first electrode lines 110 and the second electrode lines 120 are not limited to the contents of the foregoing embodiments.
綜上所述,本申請的觸控面板可以藉由縮小第一電極線以及第二電極線之間的重疊區域來降低兩者之間的寄生電容,並進一步縮小兩者之間的距離。如此,可以減少材料的用量,節省製作成本,並且可以使觸控面板整體具有較小的厚度,以及良好的透光率。同時,由於各第一電極線的各第一連接段的寬度是由連接電極墊的兩端部朝向兩端部之間的中間部遞減而呈現頸縮狀,並且各第一連接段的兩端部與相應的電極墊的連接處具有呈現平滑曲面的轉角,可以避免連接處應力集中,進而減少第一連接段從其與相應的電極墊的連接處斷裂的機率。據此,本申請的觸控面板的第一電極線不容易在製作或使用時從第一連接段與相 應的電極墊的連接處斷裂,而可確保製程良率與可靠度。In summary, the touch panel of the present application can reduce the parasitic capacitance between the two by reducing the overlapping area between the first electrode line and the second electrode line, and further reduce the distance between the two. In this way, the amount of materials can be reduced, the manufacturing cost can be saved, and the touch panel as a whole can have a small thickness and a good light transmittance. At the same time, since the width of each of the first connecting segments of each of the first electrode lines is decreased by the end portions of the connecting electrode pads toward the intermediate portion between the both end portions, the neck portions are formed, and both ends of the first connecting portions are formed. The connection between the portion and the corresponding electrode pad has a corner that exhibits a smooth curved surface, which can avoid stress concentration at the joint, thereby reducing the probability of the first connecting portion breaking from the joint with the corresponding electrode pad. Accordingly, the first electrode line of the touch panel of the present application is not easy to be formed and used from the first connection segment and phase. The connection of the electrode pads should be broken to ensure process yield and reliability.
雖然本申請已以實施例揭露如上,然其並非用以限定本申請,任何所屬技術領域中具有通常知識者,在不脫離本申請的精神和範圍內,當可作些許的更動與潤飾,故本申請的保護範圍當視後附的申請專利範圍所界定者為準。Although the present application has been disclosed in the above embodiments, it is not intended to limit the present application, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present application. The scope of protection of this application is subject to the definition of the scope of the appended claims.
110‧‧‧第一電極線110‧‧‧First electrode line
112‧‧‧電極墊112‧‧‧electrode pads
114‧‧‧第一連接段114‧‧‧First connection segment
114a‧‧‧兩端部114a‧‧‧ Both ends
114b‧‧‧中間部114b‧‧‧Intermediate
120‧‧‧第二電極線120‧‧‧Second electrode line
D1‧‧‧第一方向D1‧‧‧ first direction
D2‧‧‧第二方向D2‧‧‧ second direction
L1、L2‧‧‧長度L1, L2‧‧‧ length
R1‧‧‧重疊區域R1‧‧‧ overlapping area
W1、W2‧‧‧寬度W1, W2‧‧‧ width
Claims (9)
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Citations (4)
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TW201015416A (en) * | 2008-08-01 | 2010-04-16 | 3M Innovative Properties Co | Methods of making composite electrodes |
US20100220075A1 (en) * | 2009-03-02 | 2010-09-02 | Au Optronics Corporation | Touch sensing display panel and touch sensing substrate |
US20110090172A1 (en) * | 2009-10-16 | 2011-04-21 | Kaya Tetsuhiro | Capacitive touch sensor |
TW201218056A (en) * | 2010-09-30 | 2012-05-01 | Fujifilm Corp | Touch panel and fabrication method thereof |
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TW201015416A (en) * | 2008-08-01 | 2010-04-16 | 3M Innovative Properties Co | Methods of making composite electrodes |
US20100220075A1 (en) * | 2009-03-02 | 2010-09-02 | Au Optronics Corporation | Touch sensing display panel and touch sensing substrate |
US20110090172A1 (en) * | 2009-10-16 | 2011-04-21 | Kaya Tetsuhiro | Capacitive touch sensor |
TW201218056A (en) * | 2010-09-30 | 2012-05-01 | Fujifilm Corp | Touch panel and fabrication method thereof |
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