201106235 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種觸控面板’且特別係關於一種觸控面板 的多點辨識方法。 【先前技術】 傳統觸控面板主要包括電阻式、電容式、紅外線式以及表 面聲波式。一般如四線或五線感測電阻式觸控面板，因為是採 類比方式偵測導電膜上的電壓變化，因此，在使用過程中同一 時間只能辨識單點觸控動作，當使用者同時以多點觸控動作進 行輪入時，會產生誤動作。 美國專利公開案 US2006/0097991 以及 US2008/0158181 分別揭露一種可進行多點觸控辨識的電容式觸控面板結構，其 一般包括分別設置在二透明玻璃基板相對側表面上透明導電 k依據產ασ解析度的不同，兩個導電層分別需經傳統黃光製 裎，形成多條相互間隔且平行設置的導線，且兩面的導線互相 垂直。操作時，藉由反復掃描各條導線，分析其上電容的變化 來判斷使用者手指翻點的座標。 然而，上述電容式觸控面板，需以傳統黃光製程生產，製 办、度尚產DO良率較低，驅動方法也較為複雜。因此，雖電 =觸控面板可辨識多點觸控操作，但其高昂的成本，無形中 t制了其適合的應用範圍。 【發明内容】 201106235 本發明提供-種觸控面板的多點辨識方法 很接近的情況下仍然可以判斷接觸點的座標。 二”’ 板旦種用於觸控面板的多點;識方法。該觸控面 板八有相豐合的第—導電層及第二導電層。 轴向具有多個第-電極，而第二導電層沿第 1二 二電極。該多點辨識方法包括：當提供第；' 二固第 時，感測第二電極而獲得第一電位函數 坠到：；電極 二第電極的一部份而不提供第一電壓到該些第一電極的另 一部份時’感測第二電極而獲得第二電位函數 電位函數“二電位聽而計算於該觸控 與第二觸控點於第二軸向的位置。 纟觸控』 本發明提出-種用於觸控面板的多點辨識方法，直中 面^具有相疊合的第—導電層及第二導電層。第 ^ 第，。第二導電層沿第二轴向具有‘ ;第:導其中第二電極舆第三電極分別被配置 第一電極的第一部份而不提供第-電壓 =細第一電壓到該些第一電極的第二部；201106235 VI. Description of the Invention: [Technical Field] The present invention relates to a touch panel and in particular to a multi-point identification method for a touch panel. [Prior Art] Conventional touch panels mainly include resistive, capacitive, infrared, and surface acoustic waves. Generally, a four-wire or five-wire sensing resistive touch panel is used to detect a voltage change on a conductive film in an analogy manner. Therefore, only one-touch motion can be recognized at the same time during use, when the user simultaneously When a wheel is placed in a multi-touch motion, a malfunction occurs. US Patent Publication No. US2006/0097991 and US2008/0158181 respectively disclose a capacitive touch panel structure capable of multi-touch recognition, which generally comprises transparent conductive k disposed on opposite side surfaces of two transparent glass substrates, according to ασ analysis. Depending on the degree, the two conductive layers are respectively subjected to conventional yellow light to form a plurality of mutually spaced and parallel wires, and the wires on both sides are perpendicular to each other. During operation, the coordinates of the user's finger are turned over by repeatedly scanning each wire and analyzing the change in capacitance. However, the above-mentioned capacitive touch panel needs to be produced by a conventional yellow light process, and the manufacturing and processing yields are low, and the driving method is also complicated. Therefore, although the electric touch panel can recognize multi-touch operation, its high cost has invisibly adapted its application range. SUMMARY OF THE INVENTION 201106235 The present invention provides a multi-point identification method for a touch panel. The coordinates of the contact point can still be judged in the case of close proximity. The second layer of the slab type is used for the touch panel; the touch panel has a first conductive layer and a second conductive layer. The axial direction has a plurality of first electrodes, and the second The conductive layer is along the first and second electrodes. The multi-point identification method includes: when the second portion is provided, sensing the second electrode to obtain the first potential function and falling to: a part of the second electrode of the electrode When the first voltage is not supplied to the other part of the first electrodes, the second potential function is obtained by sensing the second electrode. The two potentials are calculated in the touch and the second touch point is in the second Axial position. The present invention proposes a multi-point identification method for a touch panel, wherein the direct midplane has a first conductive layer and a second conductive layer. The first ^,. The second conductive layer has a '' in the second axial direction; wherein: the second electrode 舆 the third electrode is respectively disposed with the first portion of the first electrode without providing the first voltage=the fine first voltage to the first The second part of the electrode;
二，:亥些第1極的第，一部份時，感測第三電極而獲得J -電位减，將第—t位函數巾極值所對 控點於第二軸向的位t 1視為第-觸 位置視為第二觸控點於第二轴向的位置。山數中極值所對應的 在本發明之—實施例中，上述之第 具有導電異向性。例如，第二導電層的二方、向:第導:: 201106235 向’而第二導電層的低阻抗方向為第二軸向。在本發明之-實 把例中f ^電層及第二導電層為平行排列的奈米碳管所形 成之導電薄膜。 . 基=上述，本發明實施例在二個觸控點很接近的情況下讀 出3有第-與第一觸控點的第一電位函數，然後藉由驅動一部 份的導電層電極來讀出含有第—觸控點的第二f位函數(同時 獲得第-，控點的位置），最後藉由第一電位函數與第二電位 函數而計异出第二觸控點的位置。本發明另一實施例於導電層 籲的左右一側各自配置了一組電極，在二侧控點很接近的情況 下’藉由驅動一部份的導電層電極而仍然可以從導電層左右二 側的電極組獲得第一與第二觸控點的位置。 為讓本發明之上述特徵和優點能更明顯易懂，下文特舉實 知例並配合所附圖式作詳細說明如下。 【實施方式】 圖1為本發明一實施例的電阻式觸控面板100組合圖。在 鲁囷1中引入由卡兒座標系統(Cartesian coordinate system)，其包 括相互垂直的x軸方向Y軸方向和Z軸方向。為了簡化圖式 及說明’圖1中之第一電極114及第二電極124僅分別以五電 極表示’但實際應用時，第一感測電極114及第二感測電極 124的數目，可根據實際觸控面板的面積及應用領域而定。 如圖1所示’觸控面板1〇〇由第一導電膜110與第二導電 膜120相疊合而成。第一導電膜110與第二導電膜120二者以 一環形膠體層130黏合固定。第一導電膜110與第二導電膜 201106235 120之間均勻散佈多個絕緣間隔物(Spacer) 132，使二導電膜 110、120維持一固定間距。 第一導電膜110包括基板111與第一導電層113 ’其中第 一導電層113藉由膠體層112黏合固定於基板ill表面。在第 一導電層113的一側沿第一軸向(例如：X軸方向)設置多個第 一電極114。其中，第一電極114間之間距相等，並分別與第 一導電層113電性連接；第一電極114的末端延伸至第一導電 膜110的下緣中央’作為對外部傳遞訊號之用。 第二導電膜120亦包括一基板121與第二導電層123，第 二導電層123藉由膠體層122黏合固定於基板121表面。在第 二導體層123的一侧沿第二軸向(例如：γ軸方向)設置多個第 二電極124。第二電極124間之間距相等，並分別與第二導電 層123電性連接；第二電極124與第二導電膜120右侧數條平 行排列的連接導線125連接，連接導線125沿著第二導電層 123右側邊緣延伸’連接導線125的末端延伸至第二導電膜12〇 的下緣中央’作為對外部傳遞訊號之用。 此外，觸控面板100另包括一軟性印刷電路板14〇，其具 有複數個金屬接點141，在環形膠體層13〇下緣中央具有一缺 口 131。在組裝時，該缺口 131與軟性電路板14〇對應，軟性 電路板140上下的金屬接點141可與第一導電膜11〇及第二導 電膜120上的各導線的末端電性連接，可使外部電訊號傳遞到 第一導電層110的第一電極114以及第二導電層12〇的第二電 極124上。 在一較佳實施例中，本發明實施例觸控面板1〇〇所使用之 基板111、121，可採用透明材質如：聚乙烯(p〇iyethyiene，pE)、 201106235 聚石炭酸酉旨（Polycarbonate, PC)、聚對苯二甲酸二乙酉旨 (polyethylene terephthalate，PET)、聚曱基丙稀酸曱酉旨 (PolyMethylMethAcrylate，PMMA)或薄化後的玻璃基板等。環 . 形膠體層130、膠體層112及膠體層122可以是熱固化膠或 UV固化膠等。 在台灣專利公開案（公開號：TW 200920689)「奈米碳管薄 膜製備裝置及其製備方法」中，揭露一種奈米碳管薄膜的製備 方法，藉由該方法可產生一具有導電特性的奈米碳管薄膜，且 φ 因5亥方法是由超順垂直排列奈米碳管陣列（Super Vertical-Aligned Carbon Nanotube Array)透過拉伸方式製成，可 應用於製作透明的導電薄膜。 為了提高觸控面板100的可靠度，並縮減觸控面板;[〇〇的 邊框寬度，本發明實施例中之第一導電層113及第二導電層 123是以上述方法所形成的奈米碳管導電薄膜所構成。但因拉 伸製程中’長鍊狀奈米碳管約略沿著拉伸方向平行排列，而奈 米碳管導電薄膜在拉伸方向具有較低阻抗，在垂直拉伸方向阻 • 抗約為拉伸方向阻抗的50至350倍之間，其表面電阻也因量 測的位置不同、方向不同而介於1 ΚΩ至800 ΚΩ之間，因此 第一導電層113及第二導電層123具有導電異向性(Anisotropic Conductivity)。 如圖1所示，在本發明實施例中，第一導電層113具有一 主導電方向D1 (原導電膜拉伸方向），第二導電層123具有另 主導電方向D2。在此實施例中，第一導電層113的主導電 方向（即低阻抗方向）D1及第二導電層123的主導電方向D2 相互垂直。例如’第二導電層123的低阻抗方向D2為X軸方 201106235 向而第一導電層113的低阻抗方向D1為Y軸方向。在此， 第&電層113與第二導電層123在主導電方向之垂直方向的 阻抗’約為主導電方向Dl、D2阻抗的100至200倍之間。 為了簡化說明，以下實施例以觸控面板100在操作時，僅 f一個觸控點舉例。但實際操作時，本發明實施例觸控面板之 夕點辨識方法亦可適用於更多觸控點的情形。 “圖2疋依照本發明實施例說明圖1中觸控面板1〇〇的感剛 電位函數。第二導電層123上的第二電極124會被供給第二電 壓(例如接地電壓Vss)。當提供接地電壓Second, in the first part of the first pole, the third electrode is sensed to obtain the J-potential reduction, and the control point of the first-t-position function wiper is at the second axial position t 1 The first touch position is regarded as the position of the second touch point in the second axial direction. Corresponding to the extreme value of the number of mountains In the embodiment of the invention, the above-mentioned first one has an anisotropic conductivity. For example, the two directions of the second conductive layer, the direction:: 201106235, and the direction of the low impedance of the second conductive layer are the second axial direction. In the embodiment of the present invention, the electric layer and the second conductive layer are electrically conductive films formed by parallel arranged carbon nanotubes. In the above embodiment, the first potential function of the first and first touch points is read by the two touch points when the two touch points are close to each other, and then a part of the conductive layer electrodes are driven. The second f-bit function including the first touch point is read (the position of the first-control point is obtained at the same time), and finally the position of the second touch point is calculated by the first potential function and the second potential function. In another embodiment of the present invention, a set of electrodes are respectively disposed on the left and right sides of the conductive layer, and in the case where the two side control points are close, 'by driving a part of the conductive layer electrodes, the conductive layer can still be left and right. The electrode group on the side obtains the positions of the first and second touch points. The above described features and advantages of the present invention will become more apparent from the description of the appended claims. Embodiments FIG. 1 is a combination diagram of a resistive touch panel 100 according to an embodiment of the present invention. A Cartesian coordinate system is introduced in Reckless 1, which includes the x-axis direction Y-axis direction and the Z-axis direction which are perpendicular to each other. In order to simplify the drawing and the description, the first electrode 114 and the second electrode 124 in FIG. 1 are respectively represented by five electrodes, but in actual application, the number of the first sensing electrode 114 and the second sensing electrode 124 may be The area of the actual touch panel and the field of application depend on it. As shown in FIG. 1, the touch panel 1 is formed by laminating the first conductive film 110 and the second conductive film 120. Both the first conductive film 110 and the second conductive film 120 are bonded and fixed by an annular colloid layer 130. A plurality of insulating spacers (Spacer) 132 are uniformly dispersed between the first conductive film 110 and the second conductive film 201106235 120 to maintain the two conductive films 110 and 120 at a fixed pitch. The first conductive film 110 includes a substrate 111 and a first conductive layer 113'. The first conductive layer 113 is adhered to the surface of the substrate ill by the adhesive layer 112. A plurality of first electrodes 114 are disposed on one side of the first conductive layer 113 in the first axial direction (e.g., the X-axis direction). The first electrodes 114 are equally spaced apart from each other and electrically connected to the first conductive layer 113 respectively; the end of the first electrode 114 extends to the center of the lower edge of the first conductive film 110 as a signal for external transmission. The second conductive film 120 also includes a substrate 121 and a second conductive layer 123. The second conductive layer 123 is adhered and fixed to the surface of the substrate 121 by the colloid layer 122. A plurality of second electrodes 124 are disposed on one side of the second conductor layer 123 in the second axial direction (e.g., the γ-axis direction). The second electrodes 124 are equally spaced apart from each other and electrically connected to the second conductive layer 123 respectively; the second electrode 124 is connected to a plurality of connecting wires 125 arranged in parallel on the right side of the second conductive film 120, and the connecting wires 125 are along the second The right edge of the conductive layer 123 extends 'the end of the connecting wire 125 extends to the center of the lower edge of the second conductive film 12' as a signal for external transmission. In addition, the touch panel 100 further includes a flexible printed circuit board 14A having a plurality of metal contacts 141 having a notch 131 in the center of the lower edge of the annular colloid layer 13. In the assembly, the notch 131 corresponds to the flexible circuit board 14 ,, and the metal contacts 141 on the upper and lower sides of the flexible circuit board 140 can be electrically connected to the ends of the wires on the first conductive film 11 〇 and the second conductive film 120. The external electrical signal is delivered to the first electrode 114 of the first conductive layer 110 and the second electrode 124 of the second conductive layer 12A. In a preferred embodiment, the substrates 111 and 121 used in the touch panel 1 of the present invention may be made of a transparent material such as polyethylene (p〇iyethyiene, pE), 201106235 polycarbonate (Polycarbonate, PC), polyethylene terephthalate (PET), polyMethylMethAcrylate (PMMA), or a thinned glass substrate. The colloidal layer 130, the colloid layer 112, and the colloid layer 122 may be a thermosetting adhesive or a UV curable adhesive. In the Taiwan Patent Publication (Publication No.: TW 200920689), "Nano Carbon Tube Film Preparation Apparatus and Preparation Method thereof", a method for preparing a carbon nanotube film is disclosed, by which a nematic having a conductive property can be produced. The carbon nanotube film, and φ is manufactured by a super vertical-aligned carbon nanotube (Array) through a stretching method, and can be applied to produce a transparent conductive film. In order to improve the reliability of the touch panel 100 and reduce the touch panel; the first conductive layer 113 and the second conductive layer 123 in the embodiment of the present invention are nano carbon formed by the above method. The tube is made of a conductive film. However, because the long-chain carbon nanotubes in the stretching process are arranged in parallel along the stretching direction, the carbon nanotube conductive film has a lower impedance in the stretching direction, and the resistance in the vertical stretching direction is approximately Between 50 and 350 times of the directional impedance, the surface resistance is also between 1 ΚΩ and 800 ΚΩ due to the different positions and directions, so the first conductive layer 113 and the second conductive layer 123 have different conductivity. Anisotropic Conductivity. As shown in Fig. 1, in the embodiment of the invention, the first conductive layer 113 has a main conductive direction D1 (the original conductive film stretching direction), and the second conductive layer 123 has another main conductive direction D2. In this embodiment, the main conductive direction (i.e., low impedance direction) D1 of the first conductive layer 113 and the main conductive direction D2 of the second conductive layer 123 are perpendicular to each other. For example, the low-impedance direction D2 of the second conductive layer 123 is the X-axis side 201106235, and the low-impedance direction D1 of the first conductive layer 113 is the Y-axis direction. Here, the impedance 'the electrical direction of the & electrical layer 113 and the second conductive layer 123 in the direction perpendicular to the main conductive direction is between about 100 and 200 times the impedance of the main conductive directions D1, D2. In order to simplify the description, the following embodiment is exemplified by only one touch point when the touch panel 100 is in operation. However, in the actual operation, the method for identifying the touch panel of the touch panel of the present invention can also be applied to the case of more touch points. 2 illustrates a sense potential function of the touch panel 1 in FIG. 1 according to an embodiment of the present invention. The second electrode 124 on the second conductive layer 123 is supplied with a second voltage (eg, a ground voltage Vss). Ground voltage
Vss到各個第二電極 =4時，感測電路(未繪示)可以一個接著一個地依序感測第一 導電層113上的每一個第一電極114。當在感測第一電極114 中之時’其他未感測的第一電極114會被提供第一電壓(例 如系、’4電壓Vdd)。因此，依據每—個第一電極114的位置(相 當於X轴位置)與所感測到的電壓，可以獲得X軸的電位函 數。圖2况明當觸控面板1〇〇有二個觸控點。在觸控點位置， I:導電層113與第二導電層123發生電性連接。由於第一導 電層U3的^電異向性，使得此二個觸控點的χ軸位置^與 &的電=曰被第電層123拉低，而其他位置則約略維持於 電Ydd之準位。因此，將此X轴電位函數中的二個極 =在此為相對極小值)所對應的位置分別 第二觸控點於X軸向的位置。 ·Ί·· /、 相類似地，在感測第二導電層口 之-時，第-導電層113上的坌弟一電極124其中 觀。此時，感測電路(未㈣‘會姚給系統電壓 每一個第二電極124。當在感測第二電極ι:其==感^ 201106235 絲感測的第二電極124會被提供接地電壓Vss。因此， 每一個第二電極124的位置(相當於γ軸位置)與所感測_電 壓’可以獲得γ軸的電位函數。由於第二導電層123的導電 異向性’使得在圖2所示此二個觸控點的γ軸位置力與^的 電^ θ被S 電層113拉南，而其他位置則約略維持於接地When Vss is at each of the second electrodes = 4, a sensing circuit (not shown) can sequentially sense each of the first electrodes 114 on the first conductive layer 113 one by one. When the first electrode 114 is sensed, the other unsensed first electrode 114 is supplied with a first voltage (e.g., '4 voltage Vdd). Therefore, the potential function of the X-axis can be obtained depending on the position of each of the first electrodes 114 (corresponding to the X-axis position) and the sensed voltage. Figure 2 shows that when the touch panel 1 has two touch points. At the touch point position, I: the conductive layer 113 is electrically connected to the second conductive layer 123. Due to the electrical anisotropy of the first conductive layer U3, the x-axis positions of the two touch points and the electric power of the & are pulled lower by the electric layer 123, while the other positions are approximately maintained by the electric Ydd. Level. Therefore, the position corresponding to the two poles in the X-axis potential function (here, the relative minimum value) is the position of the second touch point in the X-axis direction. Similarly, when the second conductive layer is sensed, the electrode 112 on the first conductive layer 113 is viewed. At this time, the sensing circuit (not (four)' will give the system voltage to each of the second electrodes 124. When sensing the second electrode ι: its == sense ^ 201106235 the second electrode 124 sensed by the wire will be supplied with the ground voltage Therefore, the position of each of the second electrodes 124 (corresponding to the γ-axis position) and the sensed voltage 'a potential function of the γ-axis can be obtained. Since the conductive anisotropy of the second conductive layer 123 is made in FIG. 2 The γ-axis positional force of the two touch points and the electric θ of ^ are pulled south by the S electric layer 113, while the other positions are approximately maintained at the ground.
Vss之準位。因此’將此γ軸電位函數中的二個極值(在 此為相對極錄)所對應驗置分縣為第-難點與第二觸 控點於Y軸向的位置。The standard of Vss. Therefore, the two extreme values (here, the relative polar records) in the γ-axis potential function are the positions of the first-difficult point and the second touch-point in the Y-axis.
一“圖2所繪示的連續函數曲線是一種示意圖。實際上，從第 五電極114與第二電極124所讀出的電壓值是離散值。利用離 ^值求仔電位函數的相對極大值與/或相對極小值，應是本領 域具有通常知識麵習知之技藝，故不在此資述。 圖3疋依照本發明實施例說明圖i中觸控面板卿的感測 卓位1~"數。圖3類似於圖2 ’不同之處在於此二個觸控點的γ 、一 yl /、丫2非常接近，使得γ軸電位函數中在位置h與 波型相4合㈣成—個更大的波形。因此，感測電路 個極:。)感測第二電極12 4後只能在此γ轴電位函數中獲得一 的γ軸。系統會將此極值所對應的位置錯認為是此二個觸控點 真正位/置（即圖3中虛線圓圈處）’然而此二個觸控點的γ軸 例所、佳/部疋”與y2。這樣的感測誤差可以透過下述諸實施 第:辨識方法而得到解決。 實施與圖4B是說明多點辨識方法的第一實施例。於本 個電極1觸控面板100的第二導電層123沿γ軸向具有多 I24與多個電極124,，電極124與電極124,分別被配 201106235 置於第二導電層12 3沿X軸向的不同側(例如圖4 a所示第二 導電層U3的左側與右側）。本實施例未詳述的内容可以參照 圖1〜圖3的相關說明。當提供第二電壓(例如接地電壓㈣到 .電極124及/或電極124,時，感測該些第_電極114而獲得χ •軸的電位函數。將Χ _電位函數中的二個極值所對應的位 置分別視為觸控點pi與觸控點pWx轴向的位置^與&。 W述在依序感測第-電極114時，提供第一電壓(例如系統電 壓Vdd)到第-電極114中其他未進行感測者。 • 纟發生如圖3所述的感測誤差時，接著進行下述步驟以獲 得此二個難關γ軸位置yi#y2 (或是其近似位置）。首先 提供系統電壓Vdd來驅動到第一電極114的第—部份，而不 提供系統電壓vdd到第-電極114的第二部份。於圖4A與圖 4B雖然㈣第—電極114被分為二個部份，然而在其他實施 例，第-電極m可能被分為三個或更多個部份。在驅動第— 電極114的過程’可以依序輪流地提供系統電塵vdd給第— 電極U4的每-個部份。另外，對於第一電極i財未被提供 # ^電壓Vdd的部份電極’可以將_接至其他參考電壓或 疋浮接，而本實施例是將第一電極114中未被提供系統電壓 Vdd的部份電極耦接至接地電壓Vss。 請參照圖4A，當提供系統電壓Vdd到第一電極114的右 半部而提供接地電壓Vss到第一電極114的左半部時，對電極 124進仃制喊得γ軸㈣—電位函數。當依序感測電極 124時，提供接地電壓Vss到這些電極124中其他未進行感測 者。在觸控面板1〇〇左侧的觸控點位置，因為第一導電層 沒有提供拉高電壓，而使得此觸控點幾乎沒有呈現在Y軸的 201106235 第電位函數。因此，該第一電位函數中的極值所對應位置 yi，可以被視為觸控面板1⑻右侧觸控點於γ軸向的位^yi。 請參照圖4B，接下來提供系統電壓Vdd到第-電極114 .的左半部，而不提供系統電壓Vdd到第-電極114的右半部。 .當提供系，電壓Vdd到第一電極114的左半部而提供接地電 f Vss到第-電極m的右半部時，對電極似，進行感測而獲 得^軸的第二電位函數。當依序感測電極124,時，提供接地 電£ Vss到這些電極124’巾其他未進行感測者。在觸控面板 # 右側的觸控點位置，因為第一導電層113沒有提供拉高電 壓，而使，此觸控闕乎沒有呈現在γ軸的第二電位函數。 因此，該第二電位函數中的極值所對應位置y2,可以被視為觸 控面板100左側觸控點於Y軸向的位置y2。 因此，縱使此二個觸控點的Y軸位置71與72非常接近， 本實施例仍然可以分別感測出此二個觸控點的γ軸位置。值 得注意的是’本實施例雖然是以「Y軸位置yi#y2非常接近」 作為示例’所屬領域之技術人員也可以依據本實施例的教示而 •類推至其他情形。例如，觸控面板100的第一導電層113可以 在其Y軸向的二側配置二組電極（圖4B未繪出上側的電極）。 藉由依序輪流地提供接地電壓Vss給電極124的上半部份與下 半部份’即使X轴位置&與χ2非常接近，仍然可以分別透過 第一導電層113二侧的電極讀出此二個觸控點χ軸位置&與 χ2(或是其近似位置）。 第二實施例 若基於產品體積之考量，則可以僅在第一導電層113與第 二導電層123的單一側配置電極。圖5Α、圖5Β與圖5C是說 201106235 月夕點辨識方法的第一實施例，其中以PY1、 表示第二導電層123上的第二電極124。本實施例未詳述的内 ^可以參照圖1〜圖3、圖4A〜圖的相關說明。在感測第二 -導電層123上的第二電極124其中之一時，第一導電層ιΐ3上 •的所有第—電極114會被供給第—電壓(例如系統電壓Vdd)。 社^感測第二電極m時’其他未感測的第二電極⑶會被 提供弟二電壓(例如接地電壓Vss卜依據每—個第二電極⑶ 的位置(相當於γ軸位置)與所感測到的電壓，可 瞻在録以㈣二個軸目4合而軸的電位函數 接著進行下述步驟以獲得此二個觸控點ρ1與ρ2的γ軸 位置h與y2 (或是其近似位置）。如圖5Β，首先提 到第-電極m的第-部份，而不提供系統電壓侧到第 一電極114的第二部份。於圖5B雖然綠示第一電極ιΐ4被分 為二個部份，然而在其他實施例，第一電極114可能被分為三 =更多個部份。另外，對於第一電極114中未被提供系期 i Vdd的部份電極’可以將其減至其他參考電魏是浮接， 而本實施例是將第-電極114中未被提供系統電壓Vdd的部 份電極耦接至接地電壓Vss。 與圖4A相似，圖5B說明當提供系統電壓㈣到第一電 極113的一部份(右半部）而不提供系統電壓Vdd到第一電極 =的另-部份(左半部)時’感測第二電極124而獲得電位函 數P1。接下來使用電位域P(1+2)與電位函數ρι而計算於觸 控面板100上觸控點pl與觸控點p2於γ轴向的位置，詳述 201106235 請參照圖5C，在觸控面板loo左侧觸控點p2的位置，因 為第一導電層113沒有提供拉高電壓’而使得此觸控點p2幾 乎沒有呈現在電位函數！^。因此，電位函數ρι中的極值所對 • 應位置可以被視為觸控面板100右側觸控點ρ1%γ軸向的位 . 置 yi。 本實施例提供一修正係數Γ，然後將電位函數P1乘上修正 係數r而獲得電位函數P1，，即P1，=rxP1。此電位函數打，可 以表示在觸控面板100上只有單一觸控點pl所對應的γ軸電 參位函數。前述提供修正係數r的實現方式，可以是建立一對照 表(lookup table)。藉由所提供的對照表，本實施例可以依據觸 控點pl於X軸向的位置幻查找該對照表，以獲得並提供該修 正係數r。 计算專式P2=P(l+2)-rxPl而獲得電位函數p2，然後將電 位函數P2中一極值(在此為相對極大值)所對應的位置視為觸 控點p2於Y軸向的位置乃。因此，縱使此二個觸控點pl與 P2的Y軸位置yi與乃非常接近，本實施例仍然可以分別感測 • 出此二個觸控點的Y軸位置。值得注意的是，本實施例雖然 疋以「y軸位置yi與w非常接近」作為示例，所屬領域之技 術人員也可以依據本實施例的教示而類推至其他情形。例如， 當X軸位置\1與仏非常接近時，以「全部驅動」與「部.份驅 動」方式提供接地電壓Vss給電極124，然後獲得觸控點pl 與p2在X軸疊合而形成的電位函數與只有觸控點pl的電位 函數，最後使用前述二電位函數而計算於觸控面板1〇〇上觸控 點pl與觸控點p2於X軸向的位置(或是其近似位置）。 在其他實施例中，修正係數Γ可以不必使用，而省略了對 照表的製備，並簡化了計算的複雜度。也就是說，上述「計苜 等式P2 = P(l+2)-rxPl」的步驟可以被修改為「計算等式Ρ2 = Ρ(1+2)-Ρ1」，以獲得電位函數Ρ2 ’進而求得觸控點ρ2於γ 軸向的位置y2。 第三實施例 本實施例採用與第二實施例相似的步驟而求得電位函數 P(l+2)與電位函數P1。本實施例與第二實施例不同之處在於使 用電位函數P(l+2)與電位函數ρ!而計算觸控點pl與觸控點 p2於Y軸向位置的方程式。 於本實施财，將電位函數p(1+2)中—極值(在此為相對 -值)所對應的位置視為中問仿罢，二收@ && Pi十 此時 201106235 T V〜Η ,啊包议凼数肀一極值（在此為 極大值)所對應的位置視為中間位置pm，而將電位函數^ -極值(在此為相對極大值)所對應的位置視為難點pl，此 Pm會位於觸控點pl與觸控點p2之間，因此當中間位置 及觸控點pi位置已知時，觸控點p2的位置可簡單利用中胃占 j得。?如，計算等式p2 = — _ 0 __控點Θ 實施例，本實施例的雖誤差較大，但砂 電極_含有觸控二i位== pi而計算出觸控點p2的位 山數p(1+2)與電位函1 左右二側各自配置了 —组電極^—實_衫第二導電勤 極’在二個觸控點很接近的情2 15 201106235 下，藉由驅動一部份的第一導電層的電極而仍然可 電層左右二側的電極組獲得觸控點pi與p2的位置 一 =本發明已以實施_露如上，然其並翻嫌定 •二ΓΓ屬技術領域中具有通常知識者，在不脫離本發明之 • 和範圍内，當可作些許之更動與潤飾，故本發明 圍备視後附之申請專利範圍所界定者為準。 ’、 【圖式簡單說明】 圖1為本發明—實施例的電阻式觸控面板组合圖。 函數 圖2是依照本發明實施例說明圖i中觸控面板的感測電位 〇 函數。 圖3是依照本發明實施例說明圖1中觸控面板的感測電位 圖4A與圖4B是說明多點辨識方法的第一實施例。 圖5A、圖5B與圖5C是說明多點辨識方法的第二實施例 【主要元件符號說明】 100 觸控面板 110、120 導電膜 111 、 121 基板 112、122、130 , 膠體層 113 ' 123 導電層 114、124、124’、ργι 〜ργΐ3 電極 125 導線 131 缺口 132 λ a r\ 絕緣間隔物 140 Η Α Λ 軟性電路板 141 金屬接點 16 201106235 D1、D2 主導電方向 PI、PI’、P2、P(l+2) 電位函數 r 修正係數 X、Y、Z 笛卡兒座標系統的座標轴A "continuous function curve shown in Fig. 2 is a schematic diagram. In fact, the voltage values read from the fifth electrode 114 and the second electrode 124 are discrete values. The relative maximum value of the potential function is obtained by using the value of the value. And/or the relative minimum value, which should be the skill of the prior art in the art, and therefore is not described herein. FIG. 3 illustrates the sensing position of the touch panel in FIG. 1 according to an embodiment of the present invention. Figure 3 is similar to Figure 2'. The difference is that γ, yl /, 丫2 of the two touch points are very close, so that the position h and the wave form are combined in the γ-axis potential function. A larger waveform. Therefore, the sensing circuit pole: .) can only obtain a γ-axis in the γ-axis potential function after sensing the second electrode 12 4. The system will mistake the position corresponding to the extreme value. It is the true position/set of the two touch points (ie, the dotted circle in FIG. 3) 'however, the γ-axis of the two touch points, jia-axis, and y2. Such sensing errors can be solved by the following implementation methods: identification methods. Implementation and FIG. 4B is a first embodiment illustrating a multipoint identification method. The second conductive layer 123 of the touch panel 100 of the present electrode 1 has a plurality of I24 and a plurality of electrodes 124 along the γ-axis, and the electrodes 124 and 124 are respectively disposed with the 201106235 placed on the second conductive layer 12 3 along the X-axis. Different sides of the direction (for example, the left side and the right side of the second conductive layer U3 shown in Fig. 4a). For details not described in this embodiment, reference may be made to the related description of Figs. 1 to 3. When a second voltage (eg, ground voltage (four)) is supplied to the electrode 124 and/or the electrode 124, the _th electrode 114 is sensed to obtain a potential function of the 轴 axis. The two extreme values in the Χ _ potential function The corresponding positions are respectively regarded as the positions of the touch point pi and the touch point pWx in the axial direction ^ and & W. When the first electrode 114 is sequentially sensed, the first voltage (for example, the system voltage Vdd) is supplied to the first - Others in the electrode 114 that are not being sensed. • When a sensing error as described in Fig. 3 occurs, the following steps are performed to obtain the two difficult γ-axis positions yi#y2 (or their approximate positions). First, the system voltage Vdd is supplied to drive to the first portion of the first electrode 114 without providing the system voltage vdd to the second portion of the first electrode 114. Although FIG. 4A and FIG. 4B, the fourth electrode 114 is divided. Two parts, however, in other embodiments, the first electrode m may be divided into three or more parts. The process of driving the first electrode 114 may sequentially provide the system electric dust vdd to the first Each part of the electrode U4. In addition, for the first electrode, the partial electrode of the voltage Vdd is not supplied. The _ can be connected to other reference voltages or 疋 floating, and in this embodiment, a part of the electrodes of the first electrode 114 that are not supplied with the system voltage Vdd are coupled to the ground voltage Vss. Referring to FIG. 4A, when the system voltage is supplied When Vdd is supplied to the right half of the first electrode 114 to provide the ground voltage Vss to the left half of the first electrode 114, the electrode 124 is clamped to obtain a γ-axis (four)-potential function. When the electrode 124 is sequentially sensed, The grounding voltage Vss is provided to the other of the electrodes 124. The position of the touch point on the left side of the touch panel 1 is because the first conductive layer does not provide the pull-up voltage, so that the touch point is hardly The potential function of 201106235 is presented on the Y-axis. Therefore, the position yi corresponding to the extreme value in the first potential function can be regarded as the position of the right touch point of the touch panel 1 (8) in the γ-axis. 4B, next provides the system voltage Vdd to the left half of the first electrode 114. without providing the system voltage Vdd to the right half of the first electrode 114. When the system is supplied, the voltage Vdd is to the left of the first electrode 114. The grounding electric f Vss is supplied to the right half of the first electrode m When the electrodes are similar, the second potential function of the ^ axis is obtained. When the electrodes 124 are sequentially sensed, the grounding voltage V Vss is supplied to the electrodes 124', and other sensors are not sensed. The position of the touch point on the right side of the panel #, because the first conductive layer 113 does not provide a pull-up voltage, so that the touch does not exhibit a second potential function in the γ-axis. Therefore, the pole in the second potential function The position corresponding to the value y2 can be regarded as the position y2 of the touch point on the left side of the touch panel 100 in the Y-axis direction. Therefore, even if the Y-axis positions 71 and 72 of the two touch points are very close, the embodiment can still The γ-axis positions of the two touch points are respectively sensed. It is to be noted that the present embodiment is exemplified by "the Y-axis position yi#y2 is very close" as an example. Those skilled in the art can also analogize to other situations in accordance with the teachings of the present embodiment. For example, the first conductive layer 113 of the touch panel 100 may be provided with two sets of electrodes on both sides of the Y-axis (the upper electrode is not depicted in FIG. 4B). By sequentially supplying the ground voltage Vss to the upper half and the lower half of the electrode 124, even if the X-axis position & is very close to χ2, the electrodes can be read through the electrodes on both sides of the first conductive layer 113, respectively. Two touch points χ axis position & χ 2 (or its approximate position). Second Embodiment An electrode may be disposed only on a single side of the first conductive layer 113 and the second conductive layer 123, based on the consideration of the product volume. 5A, 5B, and 5C show a first embodiment of the 201106235 moon point identification method, in which PY1 represents the second electrode 124 on the second conductive layer 123. The details of this embodiment which are not described in detail can be referred to the related description of Figs. 1 to 3 and 4A to Fig. 3 . When one of the second electrodes 124 on the second-conducting layer 123 is sensed, all of the first electrodes 114 on the first conductive layer ι3 are supplied with a first voltage (e.g., system voltage Vdd). When sensing the second electrode m, the other unsensed second electrode (3) will be supplied with the second voltage (for example, the ground voltage Vss is based on the position of each second electrode (3) (corresponding to the γ-axis position) and the sense The measured voltage can be recorded as (4) two axes and the potential function of the axis is followed by the following steps to obtain the γ-axis positions h and y2 of the two touch points ρ1 and ρ2 (or their approximation Position). As shown in Fig. 5, the first portion of the first electrode m is first mentioned, and the second portion of the system voltage side to the first electrode 114 is not provided. In Fig. 5B, although the green first electrode ιΐ4 is divided into Two parts, however, in other embodiments, the first electrode 114 may be divided into three = more parts. In addition, for the part of the first electrode 114 that is not provided with the system period i Vdd 'can be The reduction to the other reference voltage is floating, and in this embodiment, the partial electrode of the first electrode 114 not provided with the system voltage Vdd is coupled to the ground voltage Vss. Similar to FIG. 4A, FIG. 5B illustrates when the system voltage is supplied. (d) to a portion (right half) of the first electrode 113 without providing the system voltage Vdd to the first electrode = In the other part (the left half), the second electrode 124 is sensed to obtain the potential function P1. Next, the potential point P(1+2) and the potential function ρι are used to calculate the touch point pl on the touch panel 100. And the position of the touch point p2 in the γ-axis, detailed 201106235, please refer to FIG. 5C, the position of the touch point p2 on the left side of the touch panel loo, because the first conductive layer 113 does not provide the pull-up voltage' The control point p2 is hardly present in the potential function !^. Therefore, the extreme value in the potential function ρι is determined as the position of the touch point ρ1% γ in the right side of the touch panel 100. The embodiment provides a correction coefficient Γ, and then multiplies the potential function P1 by the correction coefficient r to obtain the potential function P1, that is, P1,=rxP1. This potential function can indicate that there is only a single touch point pl on the touch panel 100. Corresponding γ-axis electrical parameter function. The foregoing implementation of providing the correction coefficient r may be to establish a lookup table. By providing a comparison table, the embodiment may be based on the touch point pl on the X axis. Magically look up the lookup table to get and provide the fix The number r is calculated by calculating the equation P2=P(l+2)-rxPl to obtain the potential function p2, and then the position corresponding to an extreme value (here, the relative maximum value) of the potential function P2 is regarded as the touch point p2. The position of the Y-axis is such that, even though the Y-axis positions yi of the two touch points pl and P2 are very close, the present embodiment can still sense the Y-axis positions of the two touch points. It should be noted that, in this embodiment, although the "y-axis position yi is very close to w" as an example, those skilled in the art can also analogize to other situations according to the teachings of the embodiment. For example, when the X-axis position is\ 1 When the 仏 is very close to the 仏, the ground voltage Vss is supplied to the electrode 124 in the "all drive" and "partial drive" manners, and then the potential function formed by the touch points pl and p2 superimposed on the X axis is obtained and only the touch is formed. The potential function of the point pl is finally calculated by using the aforementioned two potential function to calculate the position of the touch point pl and the touch point p2 in the X-axis on the touch panel 1 (or its approximate position). In other embodiments, the correction factor Γ may not be used, the preparation of the reference table is omitted, and the computational complexity is simplified. That is to say, the above step of "calculating the equation P2 = P(l+2)-rxPl" can be modified to "calculate the equation Ρ2 = Ρ(1+2)-Ρ1" to obtain the potential function Ρ2' The position y2 of the touch point ρ2 in the γ-axis is obtained. THIRD EMBODIMENT This embodiment finds the potential function P(l+2) and the potential function P1 using steps similar to those of the second embodiment. The difference between this embodiment and the second embodiment is that the equation of the touch point pl and the touch point p2 in the Y-axis position is calculated using the potential function P(l+2) and the potential function ρ!. In this implementation, the position corresponding to the extreme value (here, the relative-value) in the potential function p(1+2) is regarded as the middle of the question, and the second is @&& Pi ten at this time 201106235 TV ~Η , 啊 凼 凼 肀 肀 肀 极 极 极 极 极 极 极 极 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应 对应For the difficulty point pl, the Pm is located between the touch point pl and the touch point p2. Therefore, when the middle position and the touch point pi position are known, the position of the touch point p2 can be simply utilized. For example, the calculation equation p2 = - _ 0 __ control point 实施 embodiment, although the error of this embodiment is large, but the sand electrode _ contains the touch two i bits == pi and calculates the position of the touch point p2 The number of mountains p (1+2) and the potential side of the potential function 1 are respectively arranged - the electrode ^ - the actual _ shirt second conductive dipole 'is close to the two touch points 2 15 201106235, by driving a part of the electrode of the first conductive layer and still the electrode group on the left and right sides of the electric layer obtains the position of the touch points pi and p2 = the present invention has been implemented as shown above, but it is suspected to be It is to be understood by those skilled in the art that the invention may be modified and modified without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a combination view of a resistive touch panel according to an embodiment of the present invention. Function Figure 2 is a diagram showing the sense potential 〇 function of the touch panel of Figure i in accordance with an embodiment of the present invention. 3 is a diagram showing sensing potentials of the touch panel of FIG. 1 in accordance with an embodiment of the present invention. FIG. 4A and FIG. 4B are diagrams illustrating a first embodiment of a multi-point identification method. 5A, FIG. 5B and FIG. 5C are diagrams illustrating a second embodiment of the multi-point identification method. [Main component symbol description] 100 touch panel 110, 120 conductive film 111, 121 substrate 112, 122, 130, colloid layer 113' 123 conductive Layers 114, 124, 124', ργι~ργΐ3 Electrode 125 Conductor 131 Notch 132 λ ar\ Insulation spacer 140 Η Α Λ Flexible circuit board 141 Metal contact 16 201106235 D1, D2 Main conduction direction PI, PI', P2, P (l+2) potential function r correction factor X, Y, Z coordinate axis of Cartesian coordinate system