TWI663538B - Capacitive touch panel and display device comprising the same - Google Patents
Capacitive touch panel and display device comprising the same Download PDFInfo
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Abstract
本發明揭示一種電容式觸控面板，其包括一第一電極及一第二電極，第一電極及第二電極在單個基板上在不同方向上相交，其中第一電極經配置以使得複數個菱形單元單胞藉由連接網格連接，每一菱形單元單胞包括複數個菱形單元網格，且第二電極經配置以使得複數個菱形單元單胞在與第一電極的交叉點處分開並藉由網格橋接件連接，每一菱形單元單胞包括複數個菱形單元網格。 The invention discloses a capacitive touch panel, which includes a first electrode and a second electrode. The first electrode and the second electrode intersect in different directions on a single substrate. The first electrode is configured to make a plurality of rhombuses. The unit cells are connected by a connection grid. Each diamond-shaped unit cell includes a plurality of diamond-shaped unit cells, and the second electrode is configured so that the plurality of diamond-shaped unit cells are separated at the intersection with the first electrode and borrowed. Connected by a grid bridge, each diamond-shaped unit cell includes a plurality of diamond-shaped cell grids.
Description
本發明係關於電容式觸控面板，該電容式觸控面板包括在單層上圖案化的驅動電極及感測電極。 The invention relates to a capacitive touch panel, which includes a driving electrode and a sensing electrode patterned on a single layer.
由於行動裝置在全世界的使用，對觸控面板裝置的需求大幅度增加。此外，隨著觸控面板裝置之技術改良及穩定性增加，觸控面板裝置日益漸增地應用於各種中型至大型的裝置。儘管觸控面板裝置已應用於個人數位助理(PDA)、競賽機、導航機器、銷售時點管理系統(POS)終端機、自動櫃員機(ATM)及類似物，但觸控面板在顯示器工業中的相對普及度(penetration)總體而言並不高。然而，觸控面板不僅廣泛應用於小型行動裝置，而且應用於多種多樣的行動多媒體產品，尤其應用於智慧型電話及數位板個人電腦(PC)。 Due to the worldwide use of mobile devices, the demand for touch panel devices has increased significantly. In addition, with the technical improvement and stability increase of touch panel devices, touch panel devices are increasingly used in various medium to large-scale devices. Although touch panel devices have been applied to personal digital assistants (PDAs), racing machines, navigation machines, point-of-sale management systems (POS) terminals, automatic teller machines (ATMs), and the like, touch panels are relatively Penetration is generally not high. However, touch panels are not only widely used in small mobile devices, but also in a variety of mobile multimedia products, especially in smart phones and tablet personal computers (PCs).
對於觸控面板裝置而言，廉價且具有精確觸控解析度的電阻式觸控面板當前由電容式觸控面板所替代，電容式 觸控面就呈現良好觸控功能性、耐久性、光透射率、戶外可見性及面板厚度而言皆為有利的。詳言之，電容式觸控面板廣泛用於具有10英吋(inch)或更小大小之行動裝置。 For touch panel devices, the low-cost resistive touch panel with precise touch resolution is currently replaced by a capacitive touch panel. The touch surface is advantageous in terms of exhibiting good touch functionality, durability, light transmittance, outdoor visibility, and panel thickness. In detail, capacitive touch panels are widely used in mobile devices having a size of 10 inches or less.
此種觸控面板包括透明電極，該等透明電極習知地由銦錫氧化物(ITO)或導電聚合物形成，諸如聚二氧乙烯噻吩/聚苯乙烯磺酸酯(PEDOT/PSS)。ITO之電導性適合用於小型裝置但不適合於大型面板。作為ITO之替代物而出現的導電聚合物因其高的可撓性及易處理性而有利，但具有不良電導性。 Such touch panels include transparent electrodes that are conventionally formed from indium tin oxide (ITO) or a conductive polymer, such as polydioxyethylene thiophene / polystyrene sulfonate (PEDOT / PSS). The conductivity of ITO is suitable for small devices but not for large panels. The conductive polymer that appears as an alternative to ITO is advantageous due to its high flexibility and ease of handling, but has poor electrical conductivity.
出於此原因，對使用金屬來形成透明電極之研究持續進行。與使用ITO或導電聚合物時相比，金屬透明電極具有優異電導性且供應量豐富。然而，當使用金屬形成電極時，觸控面板之透明性成為問題，此可歸因於金屬之不透明性。 For this reason, research on the use of metals to form transparent electrodes continues. Compared to when ITO or conductive polymers are used, metal transparent electrodes have excellent electrical conductivity and abundant supplies. However, when electrodes are formed using metal, the transparency of the touch panel becomes a problem, which can be attributed to the opacity of the metal.
電容式觸控面板可分類成雙層觸控面板及單層觸控面板。雙層觸控面板包括兩個基板，即包含具有第一電極圖案之上基板及具有第二電極圖案之下基板，該等基板彼此間隔分開，而該等基板之間***有絕緣材料以便防止第一電極圖案與第二電極圖案互相接觸。此外，上基板與下基板經形成具有連接至電極圖案的電極佈線。電極佈線起作用以使得當輸入單元與觸控螢幕接觸時，第一電極圖案與 第二電極圖案之間發生的電容變化轉移至控制單元。 Capacitive touch panels can be classified into double-layer touch panels and single-layer touch panels. The double-layer touch panel includes two substrates, including an upper substrate having a first electrode pattern and a lower substrate having a second electrode pattern. The substrates are separated from each other, and an insulating material is inserted between the substrates to prevent An electrode pattern and a second electrode pattern are in contact with each other. In addition, the upper substrate and the lower substrate are formed with electrode wirings connected to the electrode patterns. The electrode wiring functions so that when the input unit is in contact with the touch screen, the first electrode pattern and The change in capacitance occurring between the second electrode patterns is transferred to the control unit.
另一方面，單層觸控面板包括在不同方向上形成於單個基板上的第一電極圖案與第二電極圖案(圖1)。圖1之單層觸控面板包括：第二電極，該第二電極包含藉由連接器連接的複數個菱形(鑽石形)圖案；以及第一電極，該第一電極包含在與第二電極的交叉點處分開並藉由橋接件連接的複數個菱形圖案。 On the other hand, the single-layer touch panel includes a first electrode pattern and a second electrode pattern formed on a single substrate in different directions (FIG. 1). The single-layer touch panel of FIG. 1 includes: a second electrode including a plurality of diamond-shaped (diamond-shaped) patterns connected through a connector; and a first electrode including the first electrode and the second electrode. A plurality of diamond-shaped patterns separated at the intersection and connected by a bridge.
因而，連接器或橋接件具有極小寬度並因此具有極高電阻，並且包括複數個此種連接器的電極可由於RC延遲而具有減小的有效驅動電壓，並因此觸控功能性可變得不靈敏，從而不合需要地劣化感測解析度。 Thus, the connector or bridge has an extremely small width and therefore an extremely high resistance, and an electrode including a plurality of such connectors may have a reduced effective driving voltage due to the RC delay, and thus the touch functionality may become ineffective Sensitive, thereby undesirably degrading the sensing resolution.
[引用清單] [Quote list]
[專利文獻] [Patent Literature]
(專利文件1)韓國發明專利申請公開案第10-2014-0017857號。 (Patent Document 1) Korean Invention Patent Application Publication No. 10-2014-0017857.
(專利文件2)韓國發明專利申請公開案第10-2013-0141761號。 (Patent Document 2) Korean Invention Patent Application Publication No. 10-2013-0141761.
因此，本發明之一目的係提供一種觸控面板，該觸控面板包括使用金屬及/或導電氧化物的透明電極，尤其提供 一種不具有增加的基板厚度及不良可見性問題的觸控面板。 Therefore, an object of the present invention is to provide a touch panel. The touch panel includes a transparent electrode using a metal and / or a conductive oxide. A touch panel without the problems of increased substrate thickness and poor visibility.
此外，本發明之另一目的係提供一種電容式觸控面板，其中驅動電極與感測電極之間的接觸面積得以增大，因此增強互電容但減少RC時間，最終增強驅動能力。 In addition, another object of the present invention is to provide a capacitive touch panel, in which a contact area between a driving electrode and a sensing electrode is increased, so that mutual capacitance is enhanced but RC time is reduced, and finally the driving capability is enhanced.
為實現上述目的，本發明提供一種電容式觸控面板，其包含第一電極及第二電極，該第一電極及該第二電極在單個基板上在不同方向上相交，其中該第一電極經配置以使得複數個菱形單元單胞藉由連接網格連接，每一菱形單元單胞由複數個菱形單元網格組成，並且該第二電極經配置以使得複數個菱形單元單胞在與該第一電極的交叉點處分開並藉由網格橋接件連接，每一菱形單元單胞由複數個菱形單元網格組成。 To achieve the above object, the present invention provides a capacitive touch panel, which includes a first electrode and a second electrode, the first electrode and the second electrode intersect in different directions on a single substrate, and the first electrode passes through Configured such that a plurality of diamond-shaped unit cells are connected by a connection grid, each diamond-shaped unit cell is composed of a plurality of diamond-shaped unit cells, and the second electrode is configured such that the plurality of diamond-shaped unit cells are in contact with the first The intersections of an electrode are separated and connected by a mesh bridge, and each diamond-shaped unit cell is composed of a plurality of diamond-shaped cell meshes.
在本發明之觸控面板中，第二電極之網格橋接件可經形成穿過與其相鄰的第一電極之單元單胞，且網格橋接件之數量可為1或更大。 In the touch panel of the present invention, the mesh bridge of the second electrode may be formed to pass through a unit cell of the first electrode adjacent thereto, and the number of the mesh bridge may be 1 or more.
此外，本發明之觸控面板可進一步包括用於連接第一電極之單元單胞的一或多個網格橋接件，其中網格橋接件可經形成穿過與其相鄰的第二電極之單元單胞。 In addition, the touch panel of the present invention may further include one or more mesh bridges for connecting the unit cells of the first electrode, wherein the mesh bridges may be formed to pass through the cells of the second electrode adjacent thereto. Single cell.
此外，本發明提供一種顯示器裝置，該顯示器裝置包括如上所述之觸控面板。 In addition, the present invention provides a display device including the touch panel as described above.
根據本發明，電容式觸控面板包括使用金屬及/或導電氧化物形成的第一電極及第二電極，因此改良可見性並增加透射率。 According to the present invention, the capacitive touch panel includes a first electrode and a second electrode formed using a metal and / or a conductive oxide, thereby improving visibility and increasing transmittance.
此外，根據本發明，電極係以網格結構之形式提供，因此降低電阻值並增加電極之間的接觸面積，最終增加互電容並減少外部雜訊之影響。 In addition, according to the present invention, the electrodes are provided in the form of a grid structure, thus reducing the resistance value and increasing the contact area between the electrodes, ultimately increasing the mutual capacitance and reducing the influence of external noise.
根據本發明，電容式觸控面板經配置以使得第一電極及第二電極形成於單層上，因此減小基板之厚度並簡化製造製程。 According to the present invention, the capacitive touch panel is configured so that the first electrode and the second electrode are formed on a single layer, thereby reducing the thickness of the substrate and simplifying the manufacturing process.
因此，此種觸控面板可有效應用於大面積顯示器裝置。 Therefore, such a touch panel can be effectively applied to a large-area display device.
1‧‧‧驅動電極/第一電極 1‧‧‧drive electrode / first electrode
2‧‧‧連接網格 2‧‧‧ Connect the grid
3‧‧‧感測電極/第二電極 3‧‧‧sensing electrode / second electrode
4‧‧‧網格橋接件 4‧‧‧Grid Bridge
5‧‧‧網格橋接件 5‧‧‧Grid Bridge
10‧‧‧單元網格 10‧‧‧ cell grid
20‧‧‧單元單胞 20‧‧‧unit
x‧‧‧寬度 x‧‧‧ width
y‧‧‧長度 y‧‧‧ length
a‧‧‧一邊長度 a‧‧‧side length
b‧‧‧內角 b‧‧‧inner angle
X‧‧‧寬度 X‧‧‧Width
圖1例示習知單層電極圖案。 FIG. 1 illustrates a conventional single-layer electrode pattern.
圖2示意性例示根據本發明的用於電容式觸控面板之電極的網格圖案。 FIG. 2 schematically illustrates a grid pattern of electrodes for a capacitive touch panel according to the present invention.
圖3例示根據本發明的彼此相交的第一電極與第二電 極之部分。 FIG. 3 illustrates a first electrode and a second electrode intersecting each other according to the present invention. The extreme part.
圖4例示根據本發明的單元網格，其中一邊之長度為a，內角為b，寬度為x，並且長度為y。 FIG. 4 illustrates a unit grid according to the present invention, where one side has a length of a, an inner angle of b, a width of x, and a length of y.
圖5示意性例示根據本發明的包括單元網格的單元單胞。 FIG. 5 schematically illustrates a unit cell including a unit grid according to the present invention.
圖6至圖11例示根據本發明的用於電極的金屬網格圖案之實例。 6 to 11 illustrate examples of a metal grid pattern for an electrode according to the present invention.
圖12例示本發明之實例1，其中由金屬網格製成的第一電極及第二電極藉由連接網格相交。 FIG. 12 illustrates Example 1 of the present invention, in which a first electrode and a second electrode made of a metal mesh intersect by a connection mesh.
圖13例示本發明之實例3，其中由金屬網格製成的第一電極及第二電極藉由連接網格相交，並且進一步提供網格橋接件。 FIG. 13 illustrates Example 3 of the present invention, in which a first electrode and a second electrode made of a metal mesh intersect by a connection mesh, and a mesh bridge is further provided.
圖14例示根據本發明之實施例的用於形成觸控面板的一系列程序。 FIG. 14 illustrates a series of procedures for forming a touch panel according to an embodiment of the present invention.
根據本發明，電容式觸控面板包括第一電極及第二電極，該第一電極及該第二電極在單個基板上在不同方向上 相交，其中該第一電極經配置以使得複數個菱形單元單胞藉由連接網格連接，每一菱形單元單胞由複數個菱形單元網格組成，並且該第二電極經配置以使得複數個菱形單元單胞在與該第一電極的交叉點處分開並藉由網格橋接件連接，每一菱形單元單胞由複數個菱形單元網格組成。 According to the present invention, the capacitive touch panel includes a first electrode and a second electrode, and the first electrode and the second electrode are in different directions on a single substrate. Intersect, wherein the first electrode is configured such that a plurality of diamond-shaped unit cells are connected by a connection grid, each diamond-shaped unit cell is composed of a plurality of diamond-shaped unit cells, and the second electrode is configured such that a plurality of The diamond-shaped unit cell is separated at the intersection with the first electrode and connected by a mesh bridge. Each diamond-shaped unit cell is composed of a plurality of diamond-shaped cell meshes.
在根據本發明的電容式觸控面板中，第一電極可用作驅動電極。因而，第二電極可用作感測電極。替代地，第一電極可為感測電極，並且第二電極可為驅動電極。 In the capacitive touch panel according to the present invention, the first electrode may be used as a driving electrode. Thus, the second electrode can be used as a sensing electrode. Alternatively, the first electrode may be a sensing electrode, and the second electrode may be a driving electrode.
根據本發明的觸控面板為互電容式觸控面板，其類型為取決於當電壓施加於驅動電極時感測電極與驅動電極之間發生的電容變化來量測使用者之觸控點。 The touch panel according to the present invention is a mutual capacitance type touch panel, and its type is to measure a user's touch point depending on a change in capacitance between the sensing electrode and the driving electrode when a voltage is applied to the driving electrode.
下文為本發明之描述，其中第一電極為驅動電極且第二電極為感測電極，但第一電極為感測電極且第二電極為驅動電極之情況不排除在本發明之範疇之外。 The following is a description of the present invention, where the first electrode is a driving electrode and the second electrode is a sensing electrode, but the case where the first electrode is a sensing electrode and the second electrode is a driving electrode is not excluded from the scope of the present invention.
在下文中，將參考隨附圖式給出對本發明之實施例的詳細描述。在本發明之以下描述中，當併入本文中的已知構造及功能使本發明之要旨不清楚時，將省略對該等已知構造及功能之詳細描述。 Hereinafter, a detailed description will be given of embodiments of the present invention with reference to the accompanying drawings. In the following description of the present invention, when the known configurations and functions incorporated herein make the gist of the present invention unclear, a detailed description of the known configurations and functions will be omitted.
以下描述及隨附圖式例示有助於熟習此項技術者熟知 的系統及方法的使用之特定實施例。其他實施例可包括結構或邏輯修改。除非明確要求，否則可通常選擇單個要素及功能，並可改變程序之順序。一些實施例之部分及特徵可包括在其他實施例中或由其他實施例替代。 The following description and accompanying illustrations are helpful to those skilled in the art. Specific embodiments of the use of systems and methods. Other embodiments may include structural or logical modifications. Unless explicitly required, individual elements and functions can usually be selected and the order of the program can be changed. Parts and features of some embodiments may be included in or replaced by other embodiments.
如圖2及圖3所示，驅動電極1經配置以使得由複數個菱形單元網格10組成的複數個菱形單元單胞20藉助於連接網格2連接。 As shown in FIGS. 2 and 3, the driving electrode 1 is configured such that a plurality of diamond-shaped unit cells 20 composed of a plurality of diamond-shaped cell meshes 10 are connected by means of a connection mesh 2.
驅動電極1在形成感測電極3的同一表面上形成為網格結構，並經安置以便與感測電極相交。驅動電極1藉由佈線連接至電壓源。當電壓施加於驅動電極時，在驅動電極與感測電極之間產生電場。 The driving electrode 1 is formed in a grid structure on the same surface where the sensing electrode 3 is formed, and is arranged so as to intersect the sensing electrode. The driving electrode 1 is connected to a voltage source through wiring. When a voltage is applied to the driving electrode, an electric field is generated between the driving electrode and the sensing electrode.
包括在驅動電極1或感測電極3之單元單胞20中的單元網格10可提供為相同形式，且可經配置以使得此種單元網格中之每一者與另一相鄰單元網格10接觸以便相對於單元網格10之間的一個隅角(corner)而與該相鄰單元網格10對稱，或以便與相鄰單元網格10具有相同的一邊，進而允許電流流過其中。 The cell grid 10 included in the unit cell 20 of the driving electrode 1 or the sensing electrode 3 may be provided in the same form, and may be configured such that each of such a cell grid is in contact with another adjacent cell grid. The cells 10 are in contact so as to be symmetrical to the adjacent cell grid 10 with respect to a corner between the cell grids 10 or to have the same side as the adjacent cell grid 10, thereby allowing current to flow therethrough. .
感測電極3在感測使用者之觸控中起作用，並經形成以便在透明基板之一個表面上具有網格結構。感測電極3經配置以使得由複數個菱形單元網格組成的複數個菱形單 元單胞在與驅動電極1的交叉點處分開並藉由網格橋接件5連接。在圖9及圖10中例示網格橋接件。 The sensing electrode 3 plays a role in sensing a user's touch, and is formed so as to have a grid structure on one surface of the transparent substrate. The sensing electrode 3 is configured such that a plurality of diamond-shaped cells composed of a plurality of diamond-shaped cell grids The unit cell is separated at the intersection with the driving electrode 1 and connected by a mesh bridge 5. The mesh bridge is illustrated in FIGS. 9 and 10.
根據本發明，驅動電極及感測電極係提供為包含圖案化線之網格結構之形式。當將圖案化線之厚度及寬度精細控制為約若干μm時，孔徑比率(總面積相對於不同於含有圖案化線之區域的區域之比率)可達95~99.5%。當網格結構之孔徑比率以此方式增大時，可使觸控面板之透射率(透射光相對於入射光之比率)增加，且可使可見性改良。 According to the present invention, the driving electrodes and the sensing electrodes are provided in the form of a grid structure including patterned lines. When the thickness and width of the patterned lines are finely controlled to about several μm, the aperture ratio (the ratio of the total area to the area different from the area containing the patterned lines) can reach 95 to 99.5%. When the aperture ratio of the grid structure is increased in this way, the transmittance (ratio of transmitted light to incident light) of the touch panel can be increased, and visibility can be improved.
根據本發明，驅動電極及感測電極經提供以便具有網格結構，且據此，該區域(含有圖案化線之區域)很小，且表面電阻很低，因此增加觸控面板之觸控感測速率以進而實現低電力消耗。 According to the present invention, the driving electrodes and the sensing electrodes are provided so as to have a grid structure, and accordingly, the area (the area containing the patterned lines) is small and the surface resistance is very low, so the touch feeling of the touch panel is increased. Measure the rate to achieve low power consumption.
較佳地，網格之寬度為1~10μm，且更佳為1~5μm。 Preferably, the width of the grid is 1 to 10 μm, and more preferably 1 to 5 μm.
如圖2及圖3所示，根據本發明的觸控面板之感測電極3的網格橋接件5可經形成穿過與其相鄰的驅動電極1之單元單胞20，且網格橋接件之數量可為1或更大。 As shown in FIG. 2 and FIG. 3, the mesh bridge 5 of the sensing electrode 3 of the touch panel according to the present invention may be formed to pass through the unit cell 20 of the driving electrode 1 adjacent thereto, and the mesh bridge The number may be 1 or more.
此外，根據本發明的觸控面板可進一步包括一或多個網格橋接件4以用於連接驅動電極1之單元單胞20，並且網格橋接件可形成為穿過與其相鄰的感測電極之單元單 胞。 In addition, the touch panel according to the present invention may further include one or more mesh bridges 4 for connecting the unit cells 20 of the driving electrode 1, and the mesh bridges may be formed to pass through the sensing unit adjacent thereto. Electrode unit sheet Cell.
當以此方式進一步提供網格橋接件時，可防止由於在單層上形成感測電極及驅動電極的電極之間接觸面積的減小，且進而可防止產生的互電容之減小。具體而言，感測電極及驅動電極係提供為網格結構之形式，且驅動電極之網格橋接件及感測電極之網格橋接件分別經形成為穿過感測電極的具有網格結構的單元單胞及驅動電極的具有網格結構之單元單胞，進而降低電阻並增加感測電極與驅動電極之間的接觸面積以便因此增強互電容。最終，減少外部雜訊之影響。此外，減少RC時間，因此增強驅動能力。 When the grid bridge is further provided in this way, it is possible to prevent a reduction in the contact area between the electrodes forming the sensing electrode and the driving electrode on a single layer, and further prevent a reduction in the mutual capacitance generated. Specifically, the sensing electrodes and the driving electrodes are provided in the form of a grid structure, and the grid bridges of the driving electrodes and the grid bridges of the sensing electrodes are respectively formed to have grid structures passing through the sensing electrodes. The unit cell of the driving electrode and the unit cell with a grid structure of the driving electrode reduce the resistance and increase the contact area between the sensing electrode and the driving electrode so as to enhance the mutual capacitance. Ultimately, the impact of external noise is reduced. In addition, the RC time is reduced, so the driving capability is enhanced.
在本發明之實施例中，如圖4所例示，感測電極之單元網格、驅動電極之單元網格及/或感測電極之連接網格可具有菱形形狀，其中菱形形狀的一邊之長度為a且內角為b(寬度：x，長度：y)。在本發明中，單元單胞(寬度：X，長度：Y；如圖5所示)可經配置以使得單元網格在垂直與水平方向上對稱安置。單元網格之尺寸及單元單胞之尺寸如下： In the embodiment of the present invention, as illustrated in FIG. 4, the cell grid of the sensing electrode, the cell grid of the driving electrode, and / or the connection grid of the sensing electrode may have a rhombus shape, wherein the length of one side of the rhombus shape is Is a and the inner angle is b (width: x, length: y). In the present invention, the unit cell (width: X, length: Y; as shown in FIG. 5) may be configured so that the cell grid is symmetrically arranged in the vertical and horizontal directions. The size of the element grid and the size of the unit cell are as follows:
X=nx X = nx
Y=ny Y = ny
其中n為構成單元單胞的單元網格之數量。 Where n is the number of cell grids that make up the unit cell.
在單元網格中，x與y之比率可等於1：1~1：2。 In a cell grid, the ratio of x to y can be equal to 1: 1 to 1: 2.
內角b較佳地為45°~135°。 The inner angle b is preferably 45 ° to 135 °.
感測電極與驅動電極之交叉角可落入b之範圍，b為單元網格之角度。 The crossing angle of the sensing electrode and the driving electrode can fall into the range of b, where b is the angle of the cell grid.
驅動電極之網格橋接件4的數量及感測電極之網格橋接件5的數量可為1或2或更大。此外，此種網格橋接件較佳地沿著最短路徑P形成。藉由網格橋接件之初始點與終點之間的距離來判定最短路徑P。 The number of grid bridges 4 of the driving electrodes and the number of grid bridges 5 of the sensing electrodes may be 1 or 2 or more. Furthermore, such a mesh bridge is preferably formed along the shortest path P. The shortest path P is determined by the distance between the initial point and the end point of the mesh bridge.
圖6顯示驅動電極之間的對應於3x之距離。由此，驅動電極之網格橋接件的最短距離為Px=3x(6a)。因為在感測電極之間的網格橋接件之初始點與終點在其間具有2y的距離，所以感測電極之網格橋接件的最短距離為Py=2y(4a)。 Fig. 6 shows a distance corresponding to 3x between the driving electrodes. Therefore, the shortest distance of the grid bridge of the driving electrode is P x = 3x (6a). Because the initial point and the end point of the grid bridge between the sensing electrodes have a distance of 2y therebetween, the shortest distance of the grid bridge of the sensing electrode is P y = 2y (4a).
圖7顯示取決於驅動電極及感測電極之網格橋接件的初始點與終點之間的距離均勻形成的最短距離P。 FIG. 7 shows the shortest distance P formed uniformly depending on the distance between the initial point and the end point of the grid bridge of the driving electrode and the sensing electrode.
Px=3x=6a P x = 3x = 6a
Py=4y=8a P y = 4y = 8a
在圖6至圖11中，虛線指示虛設圖案。 In FIGS. 6 to 11, the dotted lines indicate dummy patterns.
圖8顯示根據本發明之另一實施例的最短路徑。 FIG. 8 shows a shortest path according to another embodiment of the present invention.
Px=7x=14a P x = 7x = 14a
Py=7y=14a P y = 7y = 14a
圖9顯示出在感測電極之網格橋接件的初始點與終點相同之條件下的網格橋接件之各種形狀。 FIG. 9 shows various shapes of the mesh bridge under the condition that the initial point and the end point of the mesh bridge of the sensing electrode are the same.
因此，網格橋接件之距離所具有之值為2a或更大，該值為驅動電極與感測電極可相對於彼此為電導性之最小值。因此，驅動電極之網格橋接件的最短路徑Px可判定為2aPx mx×2a-4a(其中mx為在驅動電極之單元單胞中單元網格之最大數量)，且感測電極之網格橋接件的最短路徑Py可判定為2aPy my×2a-4a(其中my為在感測電極之單元單胞中單元網格之最大數量)。因而，最短路徑Px及Py較佳地經設置以便為互相對稱的。 Therefore, the distance of the grid bridge has a value of 2a or more, which is the minimum value at which the driving electrode and the sensing electrode can be electrically conductive relative to each other. Therefore, the shortest path P x of the mesh bridge of the driving electrode can be determined as 2a P x m x × 2a-4a (where m x is the maximum number of element meshes in the unit cell of the driving electrode), and the shortest path P y of the mesh bridge of the sensing electrode can be determined as 2a P y m y × 2a-4a (where my is the maximum number of cell grids in the unit cell of the sensing electrode). Thus, the shortest paths P x and P y are preferably set so as to be symmetrical to each other.
圖10及圖11例示驅動電極之網格橋接件(圖10)與感測電極之網格橋接件(圖11)的最短距離及最大距離。 FIG. 10 and FIG. 11 illustrate the shortest distance and the maximum distance between the grid bridge (FIG. 10) of the driving electrode and the grid bridge (FIG. 11) of the sensing electrode.
為確保最短路徑，當感測電極之網格橋接件穿過驅動電極之內側時，驅動電極藉由橋接件連接。當驅動電極之網格橋接件相交穿過感測電極之內側時，感測電極較佳地藉由橋接件連接。 To ensure the shortest path, when the grid bridge of the sensing electrode passes through the inside of the driving electrode, the driving electrode is connected by the bridge. When the grid bridges of the driving electrodes intersect through the inside of the sensing electrodes, the sensing electrodes are preferably connected by the bridges.
為確保RC均勻性，較佳地以對稱佈置提供感測電極及驅動電極。 To ensure RC uniformity, the sensing electrodes and driving electrodes are preferably provided in a symmetrical arrangement.
根據本發明，感測電極及驅動電極可由金屬薄膜形成。金屬薄膜可由銅(Cu)、鋁(Al)、金(Au)、銀(Ag)、鎳(Ni)、鉻(Cr)或其合金形成。尤其有用的為具有高電導性的銅(Cu)、鋁(Al)、金(Au)、銀(Ag)或其合金。此外，感測電極及驅動電極可由導電氧化物薄膜形成。導電氧化物薄膜可包括選自ITO、FTO、AZO、IZO、GZO、ATO及NTO中之至少一種氧化物。 According to the present invention, the sensing electrode and the driving electrode may be formed of a metal thin film. The metal thin film may be formed of copper (Cu), aluminum (Al), gold (Au), silver (Ag), nickel (Ni), chromium (Cr), or an alloy thereof. Particularly useful are copper (Cu), aluminum (Al), gold (Au), silver (Ag), or alloys thereof having high electrical conductivity. In addition, the sensing electrode and the driving electrode may be formed of a conductive oxide film. The conductive oxide film may include at least one oxide selected from ITO, FTO, AZO, IZO, GZO, ATO, and NTO.
感測電極及驅動電極可提供為單獨的金屬薄膜之形式，或可提供為包含金屬薄膜與導電氧化物薄膜的堆疊形式，該堆疊形式經配置例如以使得金屬薄膜堆疊在導電氧化物薄膜上。 The sensing electrode and the driving electrode may be provided in the form of a separate metal thin film, or may be provided in a stacked form including a metal thin film and a conductive oxide thin film, the stacked form being configured such that the metal thin film is stacked on the conductive oxide thin film.
可使用電鍍、濺鍍或蒸鍍或諸如絲網印刷、凹版印刷或噴墨印刷的印刷製程使呈網格結構之感測電極及驅動電極形成於透明基板上。 The sensing electrodes and the driving electrodes in a grid structure can be formed on a transparent substrate using electroplating, sputtering or evaporation, or a printing process such as screen printing, gravure printing, or inkjet printing.
可不限於使用與用於形成感測電極及驅動電極之方法相同的方法形成感測電極與驅動電極之交叉點的橋接件。 It is not limited to forming the bridge of the intersection of the sensing electrode and the driving electrode using the same method as the method for forming the sensing electrode and the driving electrode.
可藉助於有機絕緣薄膜或無機絕緣薄膜或使用無圖案形成於接觸部分之製程(圖3)使感測電極及驅動電極與網格橋接件絕緣。 The sensing electrode and the driving electrode can be insulated from the grid bridge by means of an organic insulating film or an inorganic insulating film or a process (FIG. 3) in which a pattern is formed on the contact portion.
有機絕緣薄膜可為基於矽(silicon-based)的有機絕緣薄膜或混合型有機絕緣薄膜，且無機絕緣薄膜可為基於二氧化矽(silicon oxide-based)的無機絕緣薄膜。 The organic insulating film may be a silicon-based organic insulating film or a hybrid organic insulating film, and the inorganic insulating film may be a silicon oxide-based inorganic insulating film.
在本發明中，網格橋接件可經形成以便具有小至1.5μm或更小的覆層，該覆層具有驅動電極及感測電極。 In the present invention, the mesh bridge may be formed so as to have a coating layer as small as 1.5 μm or less, the coating layer having a driving electrode and a sensing electrode.
通常，當感測電極及驅動電極由金屬形成時，所得觸控面板可歸因於金屬之不透明性而具有不良透射率。然而，本發明之網格結構經配置以使得線寬度及厚度精細圖案化至若干μm，因此增大孔徑比率，進而改良觸控面板之透射率。感測電極及驅動電極係由具有高電導性之金屬形成，並因此擁有150Ω/□或更小的表面電阻，進而呈現高電導性。此外，網格結構之形成可使觸控面板之透射率增加至89%或更大，從而產生高可見性。 Generally, when the sensing electrode and the driving electrode are formed of metal, the resulting touch panel can have poor transmittance due to the opacity of the metal. However, the grid structure of the present invention is configured to finely pattern the line width and thickness to several μm, so the aperture ratio is increased, thereby improving the transmittance of the touch panel. The sensing electrode and the driving electrode are formed of a metal having high conductivity, and thus have a surface resistance of 150 Ω / □ or less, thereby exhibiting high conductivity. In addition, the formation of the grid structure can increase the transmittance of the touch panel to 89% or more, thereby generating high visibility.
根據本發明，觸控面板經配置以使得感測電極及驅動電極形成於單層上，而不是習知地形成於兩個相應透明基板上，最終實現小型觸控面板。此外，藉由顯示器提供的影像所穿過的觸控面板之厚度可減小，進而改良觸控面板 之可見性。 According to the present invention, the touch panel is configured so that the sensing electrode and the driving electrode are formed on a single layer, instead of being conventionally formed on two corresponding transparent substrates, and finally a small touch panel is realized. In addition, the thickness of the touch panel through which the image provided by the display can be reduced, thereby improving the touch panel Visibility.
下文係參考圖14的製造根據本發明的觸控面板之製程的描述。 The following is a description of a process of manufacturing a touch panel according to the present invention with reference to FIG. 14.
根據本發明之觸控面板藉由以下步驟製造：1)在透明基板上形成第一氧化物薄膜及第一金屬薄膜；2)在第一金屬薄膜上施加光阻劑(PR)並使用具有網格圖案之光遮罩使光阻劑曝露；3)顯影光阻劑並使用濕式蝕刻解決方案或乾式蝕刻製程來蝕刻第一金屬薄膜及第一氧化物薄膜，因此形成第一氧化物薄膜及第一金屬圖案；4)在第一金屬圖案上形成無機或有機絕緣薄膜；5)在絕緣薄膜上施加光阻劑(PR)並使用具有孔洞圖案之光遮罩使光阻劑曝光；6)使用濕式蝕刻解決方案或乾式蝕刻製程來蝕刻絕緣薄膜，因此形成連接孔洞；7)在絕緣薄膜上形成第二氧化物薄膜及第二金屬薄膜；8)在第二金屬薄膜上施加光阻劑(PR)並使用具有網格橋接件圖案之光遮罩使光阻劑曝光；9)顯影光阻劑並使用濕式蝕刻解決方案或乾式蝕刻製程來蝕刻第二金屬薄膜及第二氧化物薄膜，因此形成第二氧化物薄膜及第二網格橋接件圖案；以及10)在第二網格橋接件圖案上形成無機或有機絕緣薄膜。 The touch panel according to the present invention is manufactured by the following steps: 1) forming a first oxide film and a first metal film on a transparent substrate; 2) applying a photoresist (PR) on the first metal film and using Grid pattern of light mask to expose the photoresist; 3) develop the photoresist and use wet etching solution or dry etching process to etch the first metal film and the first oxide film, so the first oxide film and First metal pattern; 4) forming an inorganic or organic insulating film on the first metal pattern; 5) applying a photoresist (PR) on the insulating film and exposing the photoresist with a light mask having a hole pattern; 6) Use a wet etching solution or dry etching process to etch the insulating film, thereby forming connection holes; 7) forming a second oxide film and a second metal film on the insulating film; 8) applying a photoresist on the second metal film (PR) and use a photomask with a grid bridge pattern to expose the photoresist; 9) develop the photoresist and use a wet etching solution or a dry etching process to etch the second metal film and the second oxide film , So the shape The second oxide film and a second bridge mesh pattern; and 10) is formed on the second mesh pattern bridge an inorganic or organic insulating film.
可經由以下實例來獲得對本發明之更好理解，以下實例經闡述以說明本發明但不理解為限制本發明，且熟習此 項技術者將瞭解，在不脫離本發明之精神之情況下，各種修改或改良為可能的。因此，本發明之簡單的修改或變化落入如隨附申請專利範圍所界定的本發明之範疇內。 A better understanding of the present invention can be obtained through the following examples, which are illustrated to illustrate the invention but are not to be construed as limiting the invention, and are familiar with this Those skilled in the art will understand that various modifications or improvements are possible without departing from the spirit of the present invention. Therefore, simple modifications or variations of the present invention fall within the scope of the present invention as defined by the scope of the accompanying patent application.
實例1Example 1
如藉由如下方法所製造，基板(圖8)經圖案化以使得單元單胞中單元網格之數量為mx=20及my=10，驅動電極之單元單胞係藉由連接網格連接，且感測電極之單元單胞係藉由單個網格橋接件連接。 As manufactured by the following method, the substrate (Figure 8) is patterned so that the number of cell grids in the unit cell is m x = 20 and m y = 10, and the unit cell line of the driving electrode is connected to the grid The unit cells of the sensing electrodes are connected by a single grid bridge.
具有感測電極及驅動電極之基板係藉由以下步驟所製造：1)在透明基板上形成第一氧化物薄膜(ITO或IZO)及第一金屬薄膜(Mo及Ag之合金)；2)在第一金屬薄膜上施加光阻劑(PR)並使用具有網格圖案之光遮罩使光阻劑曝光；3)顯影光阻劑並使用濕式蝕刻解決方案來蝕刻第一金屬薄膜及第一氧化物薄膜，因此形成第一氧化物薄膜及第一金屬圖案；4)在第一金屬圖案上形成無機絕緣薄膜(SiO2)；5)在絕緣薄膜上施加光阻劑(PR)並使用具有孔洞圖案之光遮罩使光阻劑曝露；6)使用乾式蝕刻製程來蝕刻絕緣薄膜，因此形成連接孔洞；7)在絕緣薄膜上形成第二氧化物薄膜及第二金屬薄膜；8)在第二金屬薄膜上施加光阻劑(PR)並使用具有網格橋接件圖案之光遮罩使光阻劑曝光；9)顯影光阻劑並使用濕式蝕刻解決方案來蝕刻第二金屬薄膜及第 二氧化物薄膜，因此形成第二氧化物薄膜及第二網格橋接件圖案；以及10)在第二網格橋接件圖案上形成無機或有機絕緣薄膜。 A substrate having a sensing electrode and a driving electrode is manufactured by the following steps: 1) forming a first oxide film (ITO or IZO) and a first metal film (an alloy of Mo and Ag) on a transparent substrate; 2) in Apply a photoresist (PR) on the first metal film and use a light mask with a grid pattern to expose the photoresist; 3) develop the photoresist and use a wet etching solution to etch the first metal film and the first Oxide film, thereby forming a first oxide film and a first metal pattern; 4) forming an inorganic insulating film (SiO 2 ) on the first metal pattern; 5) applying a photoresist (PR) on the insulating film and using The light mask of the hole pattern exposes the photoresist; 6) the dry etching process is used to etch the insulating film, thereby forming the connection hole; 7) the second oxide film and the second metal film are formed on the insulating film; 8) the first Apply a photoresist (PR) on the two metal films and use a light mask with a grid bridge pattern to expose the photoresist; 9) develop the photoresist and use a wet etching solution to etch the second metal film and the first Dioxide film, so a second oxide film is formed And the second grid bridge pattern; and 10) forming an inorganic or organic insulating film on the second grid bridge pattern.
實例2至實例5Examples 2 to 5
以與實例1相同的方式來製造基板，該基板經配置以使得藉由複數個網格橋接件連接驅動電極及感測電極。 A substrate was manufactured in the same manner as in Example 1, and the substrate was configured such that the driving electrode and the sensing electrode were connected by a plurality of mesh bridges.
測試實例Test case
取決於網格橋接件路徑來量測實例1至實例5之基板的電阻及互電容。以下表1中給出該等結果。因而，當在單元單胞中進一步提供網格橋接件路徑時，單元單胞之電阻減小且互電容增大。在實例4及實例5中，與實例3相比，由於添加網格橋接件路徑，所以儘管電阻減小但互電容增大，因而RC時間增加。 The resistance and mutual capacitance of the substrates of Examples 1 to 5 are measured depending on the mesh bridge path. These results are given in Table 1 below. Therefore, when the grid bridge path is further provided in the unit cell, the resistance of the unit cell decreases and the mutual capacitance increases. In Examples 4 and 5, compared with Example 3, since the mesh bridge path is added, the mutual capacitance increases despite the decrease in resistance, and thus the RC time increases.
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