201211865 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種觸控位置檢知裝置，尤指一種電容 式之觸控位置檢知裝置。 【先前技術】201211865 VI. Description of the Invention: [Technical Field] The present invention relates to a touch position detecting device, and more particularly to a capacitive touch position detecting device. [Prior Art]
一般而言，觸控面板可大致分為電阻式觸控面板、及 電容式觸控面板兩種。 罨阻式觸控面板是常見 ，備導電能力的透明IT0薄膜、以及〖丁〇玻璃貼合而成，其 導電面相對配置’ t間以多個整齊排列的透明間隔點間隔 開來。當使用者以手指或觸控筆進行操作時，上下導電薄 膜因為受到壓力，上方薄膜受到壓力時，即與下方的IT0玻 璃接觸’導電產生一分壓電流，並經由控制器測知面板電 壓變化而計算出接觸點位置以進行輸入。 電容式觸控面板可分為表面電容、多點觸控的互電容 :表，電容主要應，用於戶外或是對溫歷度規格要求較為 ::的壤境’故價格較高。多點觸控式電容在ίτο層以蝕刻 外：：：矩陣使得人體在接觸時除了表面會形成電容之 ，/造成ΧΥ軸交會處之間電容值的變化。 前產蜀控面板缺點在於多層式結構生產成本高，目 式觸控面板。職… s ”阻值、電容值之特性以取得二維座標的方 法，以設計-低製造成本，電容式的觸控面板。 201211865 【發明内容】 本發明之主要目的係在提供一種量洌 以取得二維座桿的電衮十 值與電容值 1铋的电合式觸控位置檢知 多條導電線所形成的單層式觸控面板，俾;^通過 位置偵測。 以凡成—維的觸控 容二!述目的，本發明之量測電阻值與電容值的電 合式觸控位置檢知裝置，句括. 电 個並排之…… 板’其上包含有多數 广非之導電線，母一導電線具有一電阻值及相 一 T及第二端；一微控制器；一類比數位 ::該微控制器一第-多工選擇器，其係電性= ，面板'多數個導電線的第一端、及該微控制器；一第二 夕工選擇器’其係電性連接至該面板之多數個導電線的第 及該微控制器；一第一電流價測電路’其係電性連 至遠第-多工選擇器；一第二電流制電路，其係電性 妾至該第二多工選擇器；一第_開關’其係電性連接至 λ :員比數位轉換器 '該第一電流價測電路' 及該第二電产 :貞測電路；-第二開關，·-電容值價測電路，其係電性： 妾：該第-開關、及該第二開關：以及一訊號源產生器， 其仏經由該第二開關電性連接至該第一電流偵測電路 '該 第二電流偵測電路。 _其中，該訊號源產生器包括：一電感，其係通過該第 一開關電性連接至該第一電流偵測電路、及該第二電流偵 201211865 、及接地、 測電路；一第三開關，其係電性連接至該電感 及一直流電源。 多數個導電線之一 導電線之第一端具 切換至該電容值偵 一電流偵測電路、 器、該第二多工選 之浮動電容值，並 至該微控制器。該 容值中，判別具有 器5己錄該具有峰值In general, the touch panel can be roughly classified into a resistive touch panel and a capacitive touch panel. The resistive touch panel is a common, transparent ICO film with conductivity and a combination of butyl glass, and the conductive surfaces are spaced apart from each other by a plurality of neatly arranged transparent spacers. When the user operates with a finger or a stylus, the upper and lower conductive films are subjected to pressure, and when the upper film is under pressure, that is, it is in contact with the underlying IT0 glass to generate a partial voltage, and the panel voltage is detected by the controller. The contact point position is calculated for input. Capacitive touch panels can be divided into surface capacitance, multi-touch mutual capacitance: table, capacitor should be used mainly for outdoor or for the temperature history specifications: :: the price is higher. The multi-touch capacitor is etched in the ίτο layer. The outer::: matrix allows the human body to form a capacitance in addition to the surface when it comes into contact, causing a change in the capacitance between the x-axis intersections. The disadvantage of the pre-production control panel is that the multi-layer structure has a high production cost and a visual touch panel. ...... s "resistance, capacitance value characteristics to obtain two-dimensional coordinates, to design - low manufacturing cost, capacitive touch panel. 201211865 [Summary of the Invention] The main object of the present invention is to provide a measurement Obtain a single-layer touch panel formed by a plurality of conductive lines by detecting the electric hexadecimal value of the two-dimensional seatpost and the electric-coupled touch position of the capacitance value of 1铋, 俾;^ passing the position detection. Touch touch two! The purpose of the present invention is to measure the resistance value and the capacitance value of the electric-contact type touch position detecting device, including: the electric side by side ... the board 'containing a large number of conductive lines, The mother-conducting wire has a resistance value and a phase T and a second end; a microcontroller; an analogous digit:: the microcontroller has a first-multiplexer, its electrical property =, the panel 'most conductive a first end of the line, and the microcontroller; a second Xigong selector that is electrically connected to the plurality of conductive lines of the panel and the microcontroller; a first current price measuring circuit Electrically connected to the far-multiple selector; a second current circuit, Electrically smashing to the second multiplexer; a _ switch ' electrically connected to the λ: member to digital converter 'the first current price measurement circuit' and the second electrical product: a circuit; a second switch, a capacitance value measuring circuit, wherein: the first switch, the second switch, and a signal source generator are electrically connected to the second switch via the second switch a first current detecting circuit of the second current detecting circuit. The signal source generator includes: an inductor electrically connected to the first current detecting circuit through the first switch, and the first Two current detection 201211865, and grounding, measuring circuit; a third switch, which is electrically connected to the inductor and the DC power supply. The first end of one of the plurality of conductive lines is switched to the capacitance value to detect a current Detecting a circuit, a device, and a second multi-selected floating capacitor value, and to the microcontroller. In the capacitance value, the discriminating device 5 has recorded the peak value
本發明之操作方式如下所述：該等 導電線接收有一觸控點，該觸控點與該 有一距離。該第一開關、及該第二開關 測電路，該電容值偵測電路係通過該第 該第二電流偵測電路、該第一多工選擇 擇益偵測該面板之該等多數個導電線上 將。玄等多數個導電線之浮動電容值傳送 从控制益由該等多數個導電線之浮動電 峰值的浮動電容值之導電線，該微控制 的浮動電容值之導電線位置。 接著，該第二開關切換至該該訊號源產生器，第三開 關將4電感切換至接地，以致使該碰觸點的導電線之浮動 電容對接地放電。該第三開關將該電感切換至該直流電 源^待進入穩態後，該第一開關將該類比數位轉換器切換 至°亥第一電流偵測器、該第二電流偵測器以分別讀取第一 電流值、第二電流值。該第三開關切換至接地，待進入穩 後玄第一開關將該類比數位轉換器切換至該第一電流 、」器及该第二電流偵測器以分別讀取第三電流值、第 四電流值。該微控制器係根據第一電流值、第二電流值' 第三電流值、及第四電流值計算該觸控點與該導電線之第 一端之距離。 201211865 本發明之檢知裝置其生產成本低’但觸控位置偵測準 確度尚，係具有習知技術所無法達成之功效。 【實施方式】 請先參考圖1(a)，其係本發明_較佳實施例之系Μ 構圖。如圖所示，本發明之電容式觸控位置檢知裝置包括. 一面板1〇、一微控制器"、-類比數位轉換器12、—第一 多工選擇器u、一第二多工選擇器14、一電容值偵測電路 丨5、-第-電流偵測電路16、一第二電流偵測電路17、一 第-開關m、一第二開關182、及一訊號源產生器丨9。其 中’面板10包含有多數個並排之導電線1〇〇，每一導電線_ 具有相對之第-端a、及第：端b，以本發明—較佳實施例 為例，面板丨0包含有十條導電線J(n〜n()。 月）述頒比數位轉換器丨2係電性連接至微控制器丨丨，第 一多工選擇器13係電性連接至導電線1〇卜11〇的第—端&、 及’—仿支處理^§ 1 1，第-容丁、强4¾. uo , - -r- 弟一夕工選擇為1 4係電性連接至導電線 丨0卜丨丨0的第二端b、及-微處理器1丨。第-電流偵測電路 ⑽電性連接至第-多工選擇器13，第二電流偵測電路口 h電性連接至第二多工選擇^ 4 m㈣電性連接 至颏比數位轉換器丨2、第一電流偵測電路w'第二電流偵 匈電路1 7、及該電容值價測電路1 5。訊號源產生器i 9係通 過第一開關丨82電性連接至第一電流偵測電路1 6、第二電流 偵測電路丨7、或電容值偵測電路丨5。 201211865 本發明之訊號源產生器丨9包括：一電感19丨、一第三開 關1 92 ' —參考電壓源v。電感丨91係通過第二開關1 ^電性 連接至第-電流偵測電路！ 6、及第二電流谓測電路1 7，第 三開關192係、電性連接至電感191、及接地，參考電壓" 係電f生連接至第二開關192。本發明之觸控位置檢知裝置亦 可取消電感191之配置，其示意圖則如圖丨⑻所示。然而， 增加電感丨9丨之配置，可提高訊號源產生㈣之訊號穩定 度’減少雜訊干擾，故本實施例以增加電感ΐ9ι配置舉例說 明。 接著，請一併參考圖2及圖丨（a)，圖2係本發明_較佳實 施例之操作示意圖。如圖所示，使用者以手指觸控面板 之觸控點A，其係位於導電線1()7上，並與導電㈣7之第一 端a具有一距離X。由於導電線1〇7與手指相接觸，因此，將 使得導電線1 07上之浮動電容Cp增加。 第開關181、及第二開關182切換至該電容值偵測電 路15 ’該電容值偵測電路係通過第一電流偵測電路μ、第 二電流偵測電路17、第一多工選擇器丨3、第二多工選擇琴 丨4偵測面板丨〇之該等多數個導電線1〇〇上之浮動電容值，； ㈣等多數個導電線⑽之浮動電容值傳送至該微控制 益。於此貫施例中，導電線1()7具有較高的浮動電容值因 此，微控制器Η可得知使用者之手指係觸控於導電線⑻ 上。關於電容值偵測之相關技術，可參考中華民國專利「阻 抗檢出電路及靜電容量檢出電路」（公告號：MU%)。 201211865 確認觸控點A位於導電線107上後，本發明之觸控位置 檢知裝置更可判定觸控點A於導電線丨07上之確切位置，其 操作方式則如下所述。 ' 首先’第-多工選擇器與第二多工選擇器切換到導電 線丨07，第二開關丨82將第一電流偵測電路丨6、第二電流偵 測電路17切換至電感191 ’第三開關192將電感19ι切換至接 地，並致使導電線107之浮動電容對接地放電，微處理器丨ι 將第一電流偵測電路16與第二電流偵測電路1 7歸零。 待放電完成後，第三開關1 92將電感ι 9丨切換至直流電 源v，待進入穩態後，第一開關181將類比數位轉換器u切 換至第一電流偵測器1 6、第二電流偵測器丨7，以分別讀取 第一電流值no、及第二電流值12〇’其等效電路如圖3(a)所 示。接著，第一開關1 8丨切斷類比數位轉換器丨2與第一電流 憤測器16、第二電流偵測器17之連接，微處理器丨丨將第一 電流偵測電路1 6與第二電流偵測電路ι 7歸零，第三開關！ 92 切換至接地，待進入穩態後，第一開關18丨將類比數位轉換 器12切換至第一電流偵測器16、及第二電流偵測器17，以 分別讀取第三電流值111、及第四電流值丨2丨，其等效電路如 圖3(b)所示。該等電流值110、丨2〇、m、及121係傳送至微 控制器丨1 ’由此，微控制器1 1可計算出觸控點A與導電線1〇7 之第一端a之距離X為： X=(L*I2)/(I1+I2)， 201211865 當中’ L為該導電線之長度，n為第一電流值川之絕對值 加上第三電流值I丨丨之絕對值，12為第二電流值㈣之絕對 值加上第四電流值12 1之絕對值。 經由本發明所提供之觸控位置檢知裝置，通過多條導 電線所形成的單層式觸控面板，一 、 ；让奴以維的導電線配置即可 完成二維的觸控位置偵測。本發 知Θ h知裝置其生產成本 低，但觸控位置偵測準確度高， 成之功效。 ㈣有習知技術所無法達 旅然而，上述實施例僅係為了方便說明而舉例而已，本 毛明所主張之權利範圍自應以申 非僅限於上述實施例。 月專心圍所述為準，而 【圖式簡單說明】 一系統架構圖 二系統架構圖 示意圖。 一等效電路圖 二等效電路圖The operation mode of the present invention is as follows: the conductive lines receive a touch point, and the touch point has a distance from the touch point. The first switch and the second switch circuit, the capacitance value detecting circuit detects the plurality of conductive lines of the panel through the second current detecting circuit and the first multiplex selection will. The floating capacitance value of a plurality of conductive wires is transferred from the control wire by the floating capacitance value of the floating electric peak of the plurality of conductive wires, and the position of the conductive wire of the floating capacitance value of the micro control. Then, the second switch is switched to the signal source generator, and the third switch switches the 4 inductor to ground so that the floating capacitance of the conductive line of the bump contact discharges to the ground. The third switch switches the inductor to the DC power supply. After the first power switch is switched to the steady state, the first switch switches the analog digital converter to the first current detector and the second current detector to read separately. Taking the first current value and the second current value. The third switch is switched to ground, and the first switch is switched to the first current, the second current detector to read the third current value, and the fourth Current value. The microcontroller calculates a distance between the touch point and the first end of the conductive line according to the first current value, the second current value 'the third current value, and the fourth current value. 201211865 The detection device of the present invention has a low production cost, but the accuracy of the touch position detection is still unachievable by conventional techniques. [Embodiment] Please refer to Fig. 1(a), which is a structural diagram of a preferred embodiment of the present invention. As shown in the figure, the capacitive touch position detecting device of the present invention comprises: a panel 1 〇, a microcontroller ", an analog digital converter 12, a first multiplexer u, a second The work selector 14 , a capacitance value detecting circuit 丨 5 , a first current detecting circuit 16 , a second current detecting circuit 17 , a first switch m , a second switch 182 , and a signal source generator丨9. Wherein the panel 10 includes a plurality of side-by-side conductive lines 1 , each of the conductive lines _ having a first end a and a second end b. In the preferred embodiment of the present invention, the panel 丨 0 includes There are ten conductive lines J (n~n(). month). The digital converter 丨2 is electrically connected to the microcontroller, and the first multiplexer 13 is electrically connected to the conductive line. 11〇's first-end &, and '-imitation branch processing ^§ 1 1, Di-Jin Ding, Qiang 43⁄4. uo, - -r- The younger brother chooses 1 4 series to be electrically connected to the conductive wire丨0 丨丨 0 of the second end b, and - microprocessor 1 丨. The first current detecting circuit (10) is electrically connected to the first multiplex selector 13, and the second current detecting circuit port h is electrically connected to the second multiplex selection ^ 4 m (four) electrically connected to the turns ratio digital converter 丨 2 The first current detecting circuit w' the second current detecting circuit 17 and the capacitance value measuring circuit 15 are. The signal source generator 9 is electrically connected to the first current detecting circuit 16, the second current detecting circuit 丨7, or the capacitance value detecting circuit 丨5 through the first switch 丨82. 201211865 The signal source generator 丨9 of the present invention comprises: an inductor 19 丨, a third switch 1 92 ′ - a reference voltage source v. The inductor 丨91 is electrically connected to the first current detecting circuit through the second switch 1 ^! 6. The second current pre-measure circuit 1-7, the third switch 192 is electrically connected to the inductor 191, and the ground, and the reference voltage is connected to the second switch 192. The touch position detecting device of the present invention can also cancel the configuration of the inductor 191, and the schematic view is as shown in Fig. 8(8). However, the configuration of the inductor 丨9丨 can improve the signal stability of the signal source (4) to reduce the noise interference. Therefore, the embodiment is described by adding the inductor ΐ9ι. Next, please refer to Fig. 2 and Fig. 2(a) together. Fig. 2 is a schematic view showing the operation of the preferred embodiment of the present invention. As shown in the figure, the user touches the touch point A of the panel with a finger on the conductive line 1 () 7 and has a distance X from the first end a of the conductive (four) 7. Since the conductive line 1〇7 is in contact with the finger, the floating capacitance Cp on the conductive line 107 will be increased. The first switch 181 and the second switch 182 are switched to the capacitance detecting circuit 15'. The capacitance detecting circuit passes through the first current detecting circuit μ, the second current detecting circuit 17, and the first multiplex selector. 3. The second multiplex selects the floating capacitor value of the plurality of conductive lines 1 of the keyboard 4 detecting panel, and (4) the floating capacitor value of the plurality of conductive lines (10) is transmitted to the micro control. In this embodiment, the conductive line 1 () 7 has a higher floating capacitance value, so that the microcontroller can know that the user's finger touches the conductive line (8). For the related technology of capacitance value detection, please refer to the Republic of China patent "impedance detection circuit and electrostatic capacitance detection circuit" (publication number: MU%). 201211865 After confirming that the touch point A is located on the conductive line 107, the touch position detecting device of the present invention can further determine the exact position of the touch point A on the conductive line ,07, and the operation manner is as follows. 'First' the first-multiplexer and the second multiplexer switch to the conductive line 丨07, and the second switch 丨82 switches the first current detecting circuit 丨6 and the second current detecting circuit 17 to the inductor 191' The third switch 192 switches the inductor 19i to ground and causes the floating capacitor of the conductive line 107 to discharge to the ground, and the microprocessor resets the first current detecting circuit 16 and the second current detecting circuit 17 to zero. After the discharge is completed, the third switch 1 92 switches the inductance ι 9 至 to the DC power supply v. After the steady state is reached, the first switch 181 switches the analog digital converter u to the first current detector 16 and the second. The current detector 丨7 reads the first current value no and the second current value 12〇' respectively, and the equivalent circuit thereof is as shown in FIG. 3(a). Then, the first switch 18 cuts off the connection between the analog digital converter 丨2 and the first current anger detector 16 and the second current detector 17, and the microprocessor 丨丨 turns the first current detecting circuit 16 with The second current detecting circuit ι 7 returns to zero, the third switch! 92 is switched to ground. After the steady state is reached, the first switch 18 turns the analog digital converter 12 to the first current detector 16 and the second current detector 17 to respectively read the third current value 111. And the fourth current value 丨2丨, the equivalent circuit is shown in Figure 3 (b). The current values 110, 丨2〇, m, and 121 are transmitted to the microcontroller 丨 1 '. Thus, the microcontroller 11 can calculate the touch point A and the first end a of the conductive line 1 〇 7 The distance X is: X=(L*I2)/(I1+I2), 201211865 where 'L is the length of the conductive line, and n is the absolute value of the first current value plus the absolute value of the third current value I丨丨The value 12 is the absolute value of the second current value (4) plus the absolute value of the fourth current value 12 1 . Through the touch position detecting device provided by the present invention, a single-layer touch panel formed by a plurality of conductive lines is used, and the two-dimensional touch position detection can be completed by allowing the slave to be configured with a conductive line. . The present invention has a low production cost, but the touch position detection accuracy is high and the effect is achieved. (4) The above-mentioned embodiments are merely examples for the convenience of the description, and the scope of the claims claimed by the present invention is not limited to the above embodiments. The monthly focus is based on the description, and [simplified description of the diagram] a system architecture diagram 2 system architecture diagram. An equivalent circuit diagram
圖1(a)係本發明一較佳實施例之第 圖1 (b)係本發明—較佳實施例之第 圖2係本發明一較佳實施例之操作 圖3(a)係本發明一較佳實施例之第 圖3(b)係本發明一較佳實施例之第 【主要元件符號說明】 〇 面板 2 類比數位轉換器 4 第二多工選擇器 6 第一電流偵測電路 1微控制器 13第一多工選擇器 15 電谷值偵測電路 17第一電流偵測電路 201211865 181 第一開關 19 訊號源產生器 182 第二開關 100, 導電線 Cp 浮動電容 101〜1 10 191 電感 192 第三開關 A 觸控點 V 直流電源 a 第一端 b 第·一端 X 距離 110,120, 電流 11 1,1211(a) is a preferred embodiment of the present invention. FIG. 1(b) is a view of the preferred embodiment of the present invention. FIG. 2 is an operation of a preferred embodiment of the present invention. FIG. FIG. 3(b) is a first embodiment of the present invention. [Main component symbol description] 〇 panel 2 analog-to-digital converter 4 second multiplexer 6 first current detecting circuit 1 Microcontroller 13 first multiplexer 15 electric valley detecting circuit 17 first current detecting circuit 201211865 181 first switch 19 signal source generator 182 second switch 100, conductive line Cp floating capacitor 101~1 10 191 Inductor 192 Third switch A Touch point V DC power supply a First end b First end X Distance 110,120, Current 11 1,121
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