200923744 九、發明說明： 【發明所屬之技術領域】 •本發明係關於觸控面板之領域，更係關於—種電容式觸控登 幕用之感測裝置。 【先前技術】 .傳統上’電子裝置之輸入係以鍵盤與滑鼠為之，而不能以人 ^直見的方式為之。之後，觸控面板已被廣用於各類大小型電子 :置中’此時使用者得以手或觸控筆等物件觸擊其上之螢幕的方 =對該電子裝置進行觸點輸入，此時觸控面板下方所設之成 置感測該觸點之位置，夢以这 ^ 、 精達成刼作该觸控電子裝置的目的。以 1測觸點輸入之感測機制分，觸控面板可分類為電阻式、電容 1又ti式、光學式及電磁式等觸控面板；以觸控面板之種類分， 其又包含觸控螢幕及觸控板等分類。 以電谷式觸控面板而言，農 ^ ^ 4職置在感測觸點位置時係藉 =點處=效電容值之改變量的方式為之，其示意說 圖所不’其巾電容式觸控面板常弟 般不會使用觸控筆，因手指 $入女_ 效電容值 手以導«介而能改Μ齡置處的等 1明M u 電容摘控面板的感職置包含 迓月基板11，在該透明基板 線陣列12的設置，且該 ；;有一包⑼數條導線之導 (未顯示）之下，且守等2裝置10係設於觸控面板之一玻璃板 袖而設(在此稱作Χ轴及γ 控:::Χ:及Υ 電極相跨但互不相接觸，且位平、中:寺4“極與γ軸 π不冋千面上，且該玻璃板即為使 200923744 :者之^或觸控筆觸擊之處。此外，該等導線i2上各連接有 外接V線13 ’以供外部制電壓源Vsense依序輪人測量訊號 I而感4-使用者在該玻璃面板上的觸擊位置，以下將有說明。 該等導線12與該玻璃面板之間構成—電容，該導線陣列ι2 各及γ電極之間及與—虛擬地（未顯示）之間亦有電容效應的 ’且該等電容對於該導線陣列12之每一 乂及Y電極而言皆 和α構成#效電容。#—使用者手指或觸控筆接觸該玻璃面板 :之-點時，該接觸點即對該等導線12帶來—電容效應，故該 二等效電容值被改變。在感測該等效電容值時，該感 :二 透過該等外接導線13送入電流I，並利用-電 則早几（未顯不）感測該等電流1的改變，此電流I的改變便 =等效電容值的改變，故該觸點在該玻璃面板上的所在位 置被測知。 然而，該種感測裝置1〇之χ及γ產 aH n 心入及Y軸電極位於不同二面，故 透月基板11之所需數目實 _ 外η .…、為一，故成本偏高。此外，备一 # ,Pl,.,, 于應电机偵測早元（未顯示）接收並 偵測之’故所需之電流偵測單元 0 各外接電線13被依料ν 故成本較㊣。若令 各帝β唬Vsense ’此時電流偵測單元可為 合包机讯旒I輪流丘用， ^ 若毎一 ’、…、b日寸觸點位置的偵測速度亦變慢； 母一 ¥線12皆對應設以— μ、+、 Λ電机偵測早元，則成本又將大增。 蜢於上述原因，一種較佳 提出的必t <電谷式觸控面板的感測裝置有被 【發明内容】 200923744 目的即在於提 鑑於上述習知技術所存在的問題，本發明之 出一種電容式觸控螢幕用之感測裝置。 本發明之另—目的在於提出一 裝置，其僅使用—m 电合式觸控赏幕用之感測 皇便用早層基板，故成本較低。 本發明之另一目的在於提出一 梦晋，1路裡包奋式觸控螢幕用之感測 波置其所用之早層基板上感測用導線始 之類比5赵办結认 宁深〜、數小，故所需對應使用 時被加以^丨、③'少，故成本較低，且每—該等導線可因此同 時被加以一感都電塵，感測速度因此較快。 本毛明之電谷式觸控螢幕用之感測裳置包含 透明訊號傳導層、複數條訊號導 ^ 土反 判單元及一 >号蜍線、设數個訊號偵 ㈣二Γ該透明基板實質上為—矩形;該透明訊號傳 :方基板上’並具有—第-及-第二X方向側與 弟—Υ方向值），·複數條τ字型訊號 透明訊號傳導層上’並沿該透明訊號傳導層之該第 Υ方向側之-者上排列設置，並各包含—第—端及t二 該等訊號導線之第—端> # 系一ί而’且 1 姊者彼此間以-預定間隙相隔，該第 一铋被加以一須測電壓’以在該複數條丁字型 一電流；該參考導線被沿設於該透明訊號傳導層:之訂:成 :導線所設之該側的相對側上’並被加以該 ::::： 考導線上形成一帝法.外w i 以在该參 線及該參考導線呈-對-關係電性相接，用二號導 導纽參考導線上的電流，料《數個對叙電騎. 制為與該複數個訊號備測單S電性相接，接收 〜 並根據該複數個電流值計算 X ㈣流值， 位置。 使用者在_控螢幕上之-觸點的 200923744 在—較佳實施例中，當該複數條訊號導線與該參考導線分別 位於該第—及第二X側上時，該觸點的位置（χ,γ)為： XHi+WL. .·+Ι)+·.·+ΐη + ΐη”），及 Y'^yiIl+y2l2+...+yiIi+...+ynIn)/(Ii+I2+...+li+...+in), 其h為該複數條訊號導線之總數’ n+1為該複數條訊號導線與 該筝考導線之總數，χ1及X2分別為該透明訊號傳導層之第一 χ 似第二X側的x座標，y i (1 = 1，2，‘ · ·，η)分別為該複數條訊號導 37 座‘ 2，…，η，η+1)分別為該複數條訊號導線及該 爹考導線上之被測得電流的值，且t該複數條訊號導線與該 導線分別位於該第—及第二γ側上時，該觸點的位置(X ,γ❻： X=(hI】+X2I2+...+XiIi+...+XnIn)/(Ii+l2+.+Ii+...+in)， Y yiIn+i+y2(I1-fI2+...+ii+.i-+In)/(l!+l2+_^+I；+^^^+i^^ ?200923744 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to the field of touch panels, and more particularly to a sensing device for capacitive touch screens. [Prior Art] Traditionally, the input of an electronic device was based on a keyboard and a mouse, and could not be made in a straightforward manner. After that, the touch panel has been widely used in various types of large and small types of electronics: centering 'when the user can touch the screen on the screen with a hand or a stylus, etc.=contact input to the electronic device, this When the position set under the touch panel senses the position of the contact, the dream is achieved by the purpose of the touch electronic device. According to the sensing mechanism of the 1 touch input, the touch panel can be classified into a resistive type, a capacitive 1 and a ti type, an optical type and an electromagnetic type touch panel; and the type of the touch panel includes a touch panel. Classification of screens and trackpads. In the case of the electric valley type touch panel, when the position of the sensing contact is placed at the position of the sensing contact, the amount of change in the value of the effective capacitance is used, and the figure indicates that the figure does not have a capacitance. The touch panel often does not use the stylus, because the finger $ into the female _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The moon substrate 11 is disposed on the transparent substrate line array 12, and has a package (9) under a plurality of wires (not shown), and the Guard 2 device 10 is disposed on one of the touch panels Sleeve (herein referred to as the Χ axis and γ control:::Χ:和Υ The electrodes are spanned but not in contact with each other, and the level is flat, the middle: the temple 4" pole and the γ axis π are not thousands of faces, and The glass plate is the place where the 200923744 or the stylus is touched. In addition, the external wires V2 are connected to the wires i2 for external voltage source Vsense to measure the signal I in sequence. 4- The user's touch position on the glass panel will be described below. The wires 12 and the glass panel form a capacitor, and the wire array ι2 and the γ electrode And there is also a capacitive effect between the virtual ground (not shown) and the capacitances for each of the turns and Y electrodes of the wire array 12 constitute a #effective capacitance. #—user finger or touch When the control pen contacts the glass panel: at the point, the contact point brings a capacitance effect to the wires 12, so the two equivalent capacitance values are changed. When sensing the equivalent capacitance value, the sense: Second, the current I is sent through the external wires 13, and the change of the current 1 is sensed by using the first power (not shown), and the change of the current I = the change of the equivalent capacitance value, so the touch The position of the spot on the glass panel is detected. However, the sensing device 1 and the gamma-producing aH n in-and-n-axis electrodes are located on different sides, so the required number of the translucent substrate 11 is _ outside η ...., is one, so the cost is too high. In addition, the preparation of a #, Pl,.,, is detected by the motor detection early (not shown) received and detected the 'required current detection unit 0 Each external wire 13 is conditioned according to the material ν, so the cost is correct. If you make each 唬β唬Vsense ' at this time, the current detection unit can be a combination machine. For the rotation of the mound, ^ The detection speed of the position of the contact point of the '一,..., b is also slower; the mother and the line 12 are all set to - μ, +, Λ motor detection early element, then the cost For the above reasons, a preferred sensing device of the electric touch panel of the electric valley type touch panel has been proposed. [2009] The purpose of the present invention is to provide a problem in view of the above-mentioned prior art. A sensing device for a capacitive touch screen according to the present invention. Another object of the present invention is to provide a device that uses only the -m electrical-type touch screen for sensing the upper layer substrate of the emperor. The cost is lower. Another object of the present invention is to propose a dream, the sensing wave used in the 1 channel of the touch-sensitive touch screen, and the sensing wire on the early substrate used for the first phase. Ningshen ~, a small number, so the need to be used in accordance with the use of ^ 丨, 3 'less, so the cost is lower, and each of these wires can be added to a sense of electric dust at the same time, the sensing speed is therefore faster. The sensory skirt for the electric valley type touch screen of the present Maoming includes a transparent signal conducting layer, a plurality of signal guides, a counter-judging unit and a > 蜍 line, and a plurality of signal detectors (four) Γ the transparent substrate substantially The upper is a rectangle; the transparent signal is transmitted on the square substrate and has the first-and-second X-direction side and the younger-side direction value, and the plurality of τ-shaped signals are transparently transmitted on the signal layer. The second side of the transparent signal conducting layer is arranged on the side of the second side, and each of the first and second ends of the signal line includes a first end and a second end of the signal line. - the predetermined gap is separated, the first turn is subjected to a voltage to be measured 'to conduct a current in the plurality of T-shaped; the reference wire is disposed on the side of the transparent signal conducting layer: On the opposite side of the 'and is added to the ::::: test to form a method on the wire. The outer wi is in the line and the reference wire is --to-relational electrical connection, with the second guide The current on the wire is expected to be electrically connected to the plurality of signals. And (iv) X is calculated based on the current value of a plurality of current values, position. 200923744, in the preferred embodiment, when the plurality of signal wires and the reference wire are respectively located on the first and second X sides, the position of the contact ( χ, γ) is: XHi+WL. .·+Ι)+·.·+ΐη + ΐη”), and Y′^yiIl+y2l2+...+yiIi+...+ynIn)/(Ii+I2+. ..+li+...+in), where h is the total number of the plurality of signal wires 'n+1 is the total number of the plurality of signal wires and the kite wire, and χ1 and X2 are respectively the transparent signal conducting layer The first χ is like the x coordinate of the second X side, and yi (1 = 1, 2, ' · ·, η) is the complex signal guide 37 blocks ' 2, ..., η, η +1) respectively The value of the measured current on the signal conductor and the reference conductor, and t the position of the contact when the plurality of signal conductors and the conductor are respectively located on the first and second γ sides (X, γ❻: X=(hI]+X2I2+...+XiIi+...+XnIn)/(Ii+l2+.+Ii+...+in), Y yiIn+i+y2(I1-fI2+...+ii+.i -+In)/(l!+l2+_^+I;+^^^+i^^ ?
其：η為該複數條訊號導線之總數’ n+1為該複數條訊號導線與 / / 泉之總數，Xi(1=1，2, ..·，n)分別為該複數條訊號導線之 X座標’ yd %分縣該透明訊號傳導層之第―丫側及第二Y 側t座& Ii(卜i，2,…，n，n+1)分別為該複數條訊號導線及該 參考導線上之被測得電流的值。 藉由使用本發明， 觸點之位置 一電容式觸控螢幕上之使用者觸擊輸入之 (χ，γ)的價測可在成本低及速度快的條件下被達成。 【實施方式】 本發明為—種電容式觸控螢幕用之感測裝置，其將藉由較佳 實施例配合所附圖式詳細說明如下。 凊參閱弟二圖’其騎發明之電容式觸控螢幕用之感測裝置 200923744 ㊅不意說明圖。如圖所示，該感測裝置2G包含—透明美 板2卜—透明訊號傳導層22、複數條訊號導線23、一參考導二 24、複數條外接導、線25、複數個訊號偵測單A 26 1一控制器27。 該透明基板21實質上為一矩形。該透明訊號傳導層22被同 形嫌該透明基板21上，並具有_第_及—第二乂方向側與 一第一及一第二γ方向側。 該複數條訊號導線23被形成於該透明訊號傳導層22上，並 沿該透明«傳導層22之㈣—及第二χ&γ方向側之一者上 排列設置（圖式中所示為沿第—X方向側設置，且該等訊號導線 2〜3之數目為三，且以下皆以三訊號導線23進行說明）。該等τ 字型訊號導線23各包含一第一端及一第二端，且該第一端之τ 字型部份用以有效接收該訊號傳導層22上的—訊號，且該等訊 號接收導線23,之相鄰者彼此間以一預定間隙g相隔。該等τ字 型汛號導線之第二端各被加以一偵測電壓Vsense，以在該複數條 T字型訊號導線23上各形成一電流ll及l ^實際上，該等τ 字型訊號導線23只要有二即可達成對觸點p的感測功能。 該參考導線24被沿設於該透明訊號傳導層22上該複數條τ 字型訊號導線23所設之該側的相對側上，如在該複數條τ字型 讯號導線23被設於該第一 X側時被設於該第二χ側上，即如圖 中所示之例。該參考導線24並亦被加以該感測電壓Vsense，以 在該參考導線24上形成一電流ι4。 該複數個訊號偵測單元26與該複數條τ字型訊號導線23及 該參考導線24呈一對一關係電性相接，用以偵測該複數條τ字 型訊號導線23及參考導線24上的電流’並得到複數個對應之電 流值。 200923744 1制器27與該複數個訊號偵測單元％相接，並具有—位 、、亡"彳疋單7L 271 ’用以接收該複數個電流值，並對該等接收得電 、十而求出该觸點p在該觸控螢幕上的位置◦當使 在對該觸控勞1彳仿雜. 帛幕做觸#輸入時’其作用在該感測裝置20上的— 未顯示）上’且位置判定單元271根據該複數個所得到 置=值計算卿點p在㈣糖螢幕上的位置，其中該觸 置決疋之依據將說明如后。 咖在t佳霄施例中’上述透明訊號傳導層為銦錫氧化物 、、因鋅氧化物(IZO)或氧化録錫氧化物(Ατ〇)。 =較佳實_中，該感測裝置2Q更包含複數條外接導線 以電性連接該複數條τ字 合 與該複數個訊號價測單元26。鳴線23及轉考導線24 272，且中’該控制器27更包含—類比至數位轉換器 “複數個訊號谓測單力26得 為—類比電流佶。兮相L ^ 5 單元26Γξιί ,/ 至數位轉換器272將該複數個訊號侦測 斷單-27^之舰電輕各轉換為—數位電流值，且該位置判 :口功根據該複數個類比至數位轉換 值計算該觸點的位置。 卞』之数位屯抓 在又較佳貫施例中，今批也丨哭n山 用以儲存-查找表，其中中更包含-記憶體273’ 上之位置座標間的對"；找表為—該玻璃面板與該觸控榮幕 璃面板上者。事實上:關係t’因上述判定出之觸點位置係於玻 顯示）使用，且該Λ電腦/置t式觸控勞幕被配合—電腦裝置（未 動程式決定該杳&^有―觸控驅動程式，且該觸控驅 求出之觸點位置關係，即配合使用之謙^ 马在觸控螢幕上者。 ]〇 200923744 -取==各=個wr_…每，為 、之取榀保持電路皆可被使用。 方式進發明之在該破璃面板上的觸點位置判定原理及It is: η is the total number of the plurality of signal wires 'n+1 is the total number of the plurality of signal wires and / / springs, and Xi (1 = 1, 2, . . . , n) are respectively the plurality of signal wires The X coordinate ' yd % divided the first signal side of the transparent signal conducting layer and the second Y side t seat & Ii (i i, 2, ..., n, n + 1) are the plurality of signal wires and the The value of the measured current on the reference wire. By using the present invention, the position of the contacts can be achieved at a low cost and speed by the user's touch input (χ, γ) on a capacitive touch screen. [Embodiment] The present invention is a sensing device for a capacitive touch screen, which will be described in detail by the preferred embodiment with reference to the accompanying drawings.凊 Refer to the second picture of the sensory device for the capacitive touch screen of the invention. 200923744 Six is not intended to illustrate. As shown in the figure, the sensing device 2G includes a transparent transparent board 2 - a transparent signal conducting layer 22, a plurality of signal wires 23, a reference guide 24, a plurality of external leads, a line 25, and a plurality of signal detecting lists. A 26 1 a controller 27. The transparent substrate 21 is substantially rectangular. The transparent signal conducting layer 22 is identically shaped on the transparent substrate 21 and has a side of the _th and - second sides and a side of the first and second gamma directions. The plurality of signal wires 23 are formed on the transparent signal conducting layer 22, and are arranged along one of the (four)-- and the second χ& γ-direction side of the transparent «transmission layer 22 (shown in the figure The first X-direction side is disposed, and the number of the signal wires 2 to 3 is three, and the following is described by the three-signal wire 23). The τ-shaped signal wires 23 each include a first end and a second end, and the τ-shaped portion of the first end is configured to receive the signal on the signal conducting layer 22, and the signals are received. The wires 23, the adjacent ones are separated from each other by a predetermined gap g. The second ends of the τ-shaped sigma wires are each coupled with a detection voltage Vsense to form a current ll and l on the plurality of T-shaped signal wires 23. Actually, the τ-shaped signals As long as there are two wires 23, the sensing function for the contact p can be achieved. The reference wire 24 is disposed on the opposite side of the side of the plurality of τ-shaped signal wires 23 disposed on the transparent signal conducting layer 22, as in the plurality of τ-shaped signal wires 23. The first X side is disposed on the second side, that is, as shown in the figure. The reference conductor 24 is also coupled to the sense voltage Vsense to form a current ι4 on the reference conductor 24. The plurality of signal detecting units 26 are electrically connected to the plurality of τ-shaped signal wires 23 and the reference wires 24 in a one-to-one relationship for detecting the plurality of τ-shaped signal wires 23 and the reference wires 24 The current on the 'and a plurality of corresponding current values. 200923744 1 controller 27 is connected to the plurality of signal detecting units %, and has a bit, a dead " single 7L 271 ' for receiving the plurality of current values, and receiving the power, ten And determining the position of the contact p on the touch screen is such that when the touch is touched, the touch is applied to the sensing device 20 - not displayed And the position determining unit 271 calculates the position of the point p on the (four) sugar screen based on the plurality of obtained values, wherein the basis of the touch decision will be as follows. In the embodiment of the invention, the transparent signal conducting layer is indium tin oxide, zinc oxide (IZO) or oxide oxide tin oxide (Ατ〇). In the preferred embodiment, the sensing device 2Q further includes a plurality of external wires for electrically connecting the plurality of τ words and the plurality of signal measuring units 26. The line 23 and the test line 24 272, and the 'controller 27 further includes an analog-to-digital converter." The plurality of signals are measured as a single current 26. The analog current is 佶. The phase L ^ 5 unit 26 Γξ ιί , / The digital converter 272 converts the plurality of signal detection signals -27^ into a digital current value, and the position judgment: the port work calculates the contact according to the plurality of analog to digital conversion values. Position. The digital position of 卞 屯 屯 又 又 又 又 又 又 又 又 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今 今Look for the table - the glass panel and the touch panel panel. In fact: the relationship t' is determined by the above-mentioned contact position is displayed on the glass display), and the computer / t-type touch The screen is matched with the computer device (the untouched program determines that the 杳&^ has a touch driver, and the touch drive finds the positional relationship of the contacts, that is, the use of the modest ^ horse on the touch screen. ]〇200923744 - Take == each = wr_... Each, for, and to keep the circuit can be used. Into the contact position on the invention of the principle of determination of broken glass panel and
ί =觸點Ρ存在時’各τ字型訊號導線23與該參考導心 定電容效應。當該觸點ρ存在於該玻璃面板上時. 觸：：疋“政應皆改變，故藉此一電容效應的改變可偵測得錢 的所在位置。由於該等電容效應各對應於—在該訊號傳導 層22上的電流’故該訊號傳導層22上之電流的改變可作為觸點 之感測的依據’又該訊號傳導層22上的電流會反映於該等] 字型訊號導線23上’故偵測該等τ字型訊號導線23上的電流即 可知该觸點ρ的所在位置。 —當該複數條Τ字型訊號導線23與該參考導線24分別位於該 第一及第二X側上時，該觸點ρ的位置（又，',)為： 1 η.1 X2(Ii+I2+... + 及 Y=(y山+y2i2+..,+y山+...+ynIn)/(Ii+l2+...+Ii+...+In) (2)， 其中η為該複數條τ字型訊號導線23之總數，n+1為該複數條丁 字型訊號導線23與該參考導線24之總數，Xl及χ2分別為該透 明訊號傳導層22之第一 X側及第二x側的x座標，yi(i=1, 2,..， η)分別為該複數條τ字型訊號導線23之Y座標位置，Ii(i=1，2,...， η, n+1)分別為該複數條τ字型訊號導線23及該參考導線24上之 被測得電流的值。 當該複數條T字型訊號導線與該參考導線分別位於該第一 及第二γ側上時’該觸點的位置（Χ,Υ)為： 11 200923744 Y-yiin+,+y2(i1+i2+...+I.+__i+In)/(I]+l2+^>+Ij+_^+In+In+]) (2) 5 /、中η為4複數條τ字型訊號導線23之總數，η+ι為該複數條τ 字里虎導線23與該參考導線24之總數，Xi(i=i，2,…，η)分別 二複數侪Τ子型讯號導線23之X座標，yi及y2分別為該透明 況戒傳導層22之第-γ側及第二¥側的γ座標，叩=1，2, ...，n, n+lV刀別為該複數條τ字型訊號導線23及該參考導線24上之被 測得電流的值。 由於本龟明之感測裝置2〇僅需一基板21，少於傳統感測裝 置之二X向及γ向導線用基板，故成本得以降低。再者，由於 感則觸—點位置用之總導線23及24數少’故該等訊號偵測單元 6可同％被提供而成本不致明顯增加，不似傳統感測裝置之訊 \偵測單元僅為一而為各導線上的訊號所共用，故感測速度得以 提升。 本發明已藉由特定實施洌說明如上，熟習該項技術者可藉由 該等m施例之原理而推衍出其它可能實施例，如此推衍出之實施 例普屬於本發明的精神範圍，故本發明之實際範圍當由後附之申 請專利範圍定義之。 【圖式簡單說明】 本發明之較佳實施例的說明係透過下列圖式而為，其中： 第一圖為一傳統電容式觸控螢幕用之感測裝置的示意圖；及 第二圖為本發明之電容式觸控螢幕用之感測裝置的示意圖。 12 200923744 【主要元件符號說明】 10 感測裝置 11 透明基板 12 導線陣列 13 外接導線 20 感測裝置 21 透明基板 22 透明訊號傳導層 23 T字型訊號導線 24 參考導線 25 外接導線 26 訊號偵測單元 27 控制器 13ί = When the contact Ρ exists, the τ word signal line 23 and the reference conduction center have a constant capacitance effect. When the contact ρ is present on the glass panel, the touch:: 疋 "the polity should change, so a change in the capacitance effect can detect the location of the money. Since the capacitive effects correspond to each - in The current on the signal conducting layer 22 is such that the change in current on the signal conducting layer 22 can serve as a basis for sensing the contact' and the current on the signal conducting layer 22 will be reflected in the word signal conductor 23 Therefore, the position of the contact ρ can be known by detecting the current on the τ-shaped signal conductor 23. When the plurality of 讯-shaped signal wires 23 and the reference wire 24 are respectively located at the first and second On the X side, the position of the contact ρ (also, ',) is: 1 η.1 X2(Ii+I2+... + and Y=(y mountain+y2i2+..,+y mountain+... +ynIn)/(Ii+l2+...+Ii+...+In) (2), where η is the total number of the plurality of τ-shaped signal wires 23, and n+1 is the plurality of T-shaped signal wires 23 And the total number of the reference wires 24, X1 and χ2 are the x coordinates of the first X side and the second x side of the transparent signal conducting layer 22, respectively, and yi(i=1, 2, .., η) is the complex number Y coordinate position of the τ word type signal wire 23 Ii (i = 1, 2, ..., η, n + 1) are the values of the measured current on the plurality of τ-shaped signal wires 23 and the reference wire 24, respectively. When the signal wire and the reference wire are respectively located on the first and second γ sides, the position of the contact (Χ, Υ) is: 11 200923744 Y-yiin+, +y2(i1+i2+...+I.+ __i+In)/(I]+l2+^>+Ij+_^+In+In+]) (2) 5 /, η is the total number of 4 complex τ-shaped signal wires 23, η+ι is the The total number of the tiger wires 23 and the reference wires 24 in the plurality of τ words, Xi (i = i, 2, ..., η) respectively, the X coordinates of the dice type signal wires 23, yi and y2 are respectively transparent The γ coordinate of the first-γ side and the second ¥ side of the conductive layer 22, 叩=1, 2, ..., n, n+lV is the plurality of τ-shaped signal wires 23 and the reference wire The value of the measured current on the 24th. Since the sensing device 2 of the present turtle requires only one substrate 21, which is less than the substrate for the X-direction and gamma guiding wires of the conventional sensing device, the cost is reduced. Since the sense is the touch-point position, the total number of wires 23 and 24 is small. Therefore, the signal detecting unit 6 can be provided at the same cost. It does not increase significantly, unlike the traditional sensing device, the detection unit is only used for the signals on the wires, so the sensing speed is improved. The present invention has been described above by the specific implementation, familiar with the item. The exemplified embodiments of the present invention can be deduced from the scope of the invention. The embodiments of the present invention are intended to be included in the scope of the invention. Define it. BRIEF DESCRIPTION OF THE DRAWINGS The description of the preferred embodiments of the present invention is made through the following drawings, wherein: the first figure is a schematic diagram of a sensing device for a conventional capacitive touch screen; and the second figure is A schematic diagram of a sensing device for a capacitive touch screen of the invention. 12 200923744 [Description of main components] 10 sensing device 11 transparent substrate 12 wire array 13 external wire 20 sensing device 21 transparent substrate 22 transparent signal conducting layer 23 T-shaped signal wire 24 reference wire 25 external wire 26 signal detecting unit 27 controller 13