201224899 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種電容式觸押 . 應電場作為電容式觸控位置檢剛心步裝广種偵測感201224899 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a capacitive touch. The electric field is used as a capacitive touch position detection.
因控裝置的研發技術中，影響自電容的主要 mr:場與接觸面積，而人體的電場又受大二 電场所景，響。由於電場有正負 01 置會產生增加電容量與減少電容；J電容式的觸控裝 里貝！上的不穩疋，而常被誤認為雜訊處理。 成 觸與：般::容::Γ術係採用電容增加的特性來量測接 電場及觸控面積比例主要取決於電路設計，人體 多次計算電容值大小，而…A 4合值，'亦即：通過 入。然而’所能量測到的變::：以判定是否有觸控輪 化量係遠小於人體電場的變化c“。這樣的變 與大地的電場杏此，右把人體的電場 準確度與理’將大幅影響電容式觸控裝置的 【發明内容】 201224899 有鑑於此，本發明之主通_ a & # y- 4曰，. 雷^…… 提供一種偵測感應 電％作為電谷式觸控位置檢測的同步裝置，俾能 觸控裝置電容值之最佳時機。 里 為達成上述目的，本發明所接彳J£夕站：BI ^ 電容式觸控位置檢測的同步裝置包括· ： f電场作為 少衣置包祜.—第—觸控元件， :、係用以接收-感應電場訊號；—第二觸控元件， 二於元件；一差動放大S I Μ含有-第-輸入 二m及一輪出端，第-輪入端係電性連接至 控兀件，第一輸入端係連接至地；—突 路’其係電性連接至差動放大器之輸出妒，:β ft Λ T 'W ni ^ 而吾感應電場訊 為+週時，零電位觸發電路H«為以位^ =場週時’零電位觸發電路之輸出職 =位’ s感應電％訊號為零電位時，零電位觸發電路之 輸出錢為上昇緣、或下降緣；以及一延遲電路 :連接至零電位觸發電路，以對應接收輪出訊號，靖 :訊號延遲—時間間隔後輸出至—電容值檢測電路.： 中，電容檢測電路係電性連接至第二觸控元件 _ 遲J之輸出訊號之上昇緣、或下降緣對第二觸控元一 電容值檢測。較佳地，該時間間隔為1/8丁至3化丁工 仃 為感應電場訊號之週期。 曰 τ 另外，本發明可包含有一阻抗裝置，其係電 差動放大器之第一輸入端及第二輪 至 為-高阻抗電阻、或一高阻抗電容，二其：，阻抗裝置 亚聯之阻抗裝置。較佳地，本發明之第-觸控元；可 201224899 線、或透明導電膜’第二觸控元件可為觸控按鍵、滑條、 飛梭、或觸控面板。 經由本發明所提供之電容式觸控裝置，可透過感應電 場訊號作為參考訊號以決定量測的時機。由於感應電場訊 唬在正、負半週的峰值區域變動最為平緩，當電容檢測電 路使用相對大小作為判斷時，在此區域所檢測出的電容值 受電場的影響變化較小’並且可測得較大的電隸變化。In the R&D technology of the control device, the main mr: field and contact area affecting the self-capacitance, and the electric field of the human body is affected by the second electric field. Since the electric field has positive and negative 01, it will increase the capacitance and reduce the capacitance; J capacitive touch device Ribe! Unstable on the ground, and often mistaken for noise processing. Touching and: General:: Capacity:: The technique used to increase the ratio of the electric field and the touch area is mainly determined by the circuit design. The human body calculates the capacitance value several times, and ... A 4 value, ' That is: pass. However, the change measured by the energy::: to determine whether there is a touch wheel volume is much smaller than the change of the human body electric field c. This kind of change and the earth's electric field apricot, the right electric field accuracy and rationality of the human body [Inventive content of the capacitive touch device will be greatly affected] 201224899 In view of this, the main pass of the present invention _ a &# y- 4曰,. 雷^... provides a detection of induced electric % as electric valley type The synchronization device for touch position detection is the best time for the capacitance value of the touch device. In order to achieve the above object, the present invention is connected to the J: station: BI ^ capacitive touch position detection synchronization device includes: f electric field as a small clothing package. - the first - touch elements, : for receiving - inductive electric field signals; - second touch elements, two components; a differential amplification SI Μ contains - the first input Two m and one round end, the first wheel end is electrically connected to the control member, the first input end is connected to the ground; the - protruding circuit is electrically connected to the output of the differential amplifier, : β ft Λ T 'W ni ^ and when the induced electric field is + week, the zero potential trigger circuit H« is in position ^ = field output 'zero potential trigger circuit output = position' s induction power % signal is zero potential, zero potential trigger circuit output money is rising edge, or falling edge; and a delay circuit: connected to zero potential trigger The circuit, in response to receiving the round-trip signal, Jing: signal delay-time interval output to - capacitance value detecting circuit.:, the capacitance detecting circuit is electrically connected to the second touch element _ late J output signal rising edge Or, the falling edge detects the capacitance value of the second touch element. Preferably, the time interval is 1/8 to 3, and the period of the induced electric field signal is 曰τ. In addition, the present invention may include an impedance. The device is a first input terminal and a second wheel of the electrical differential amplifier, a high-impedance resistor, or a high-impedance capacitor, and an impedance device of the impedance device. Preferably, the present invention - Touch element; 201224899 line, or transparent conductive film 'The second touch element can be a touch button, a slider, a shuttle, or a touch panel. The capacitive touch device provided by the present invention can be transmitted through Induced electric field signal As a reference signal to determine the timing of the measurement. Since the induced electric field signal is the most gradual in the peak area of the positive and negative half cycles, when the capacitance detecting circuit uses the relative size as the judgment, the capacitance value detected in this area is affected by the electric field. The effect of the change is smaller' and a larger electrical sub-change can be measured.
【實施方式】 請先參考圖i，其係本發明一較佳實施例之電路架構 圖士圖所示’本發明之偵測感應電立易的電容式觸控裝置1 包括：一第一觸控元件llla、一第二觸控元件mb' —阻 抗装置112、一差動放大器113、一零電位觸發電路、及 一延遲·13。其中，差動放大器113包含有—第—輸入端 H3a、一第二輸入端113b'及一輸出端H3c。第一輸入端 1 3aiT、电ϋ連接至第一觸控元件丨丨丨a ,第二輸入端丨1 %係 連接至地，輸出端i13c則電性連接至零電位觸發電路12。 阻抗裝置1 12係電性連接至差動放大器n 3之第一輸入端 1 1 3a、及第二輸入端丨丨3b。另外，延遲電路1 3係電性連接 至零電位觸發電路丨2及電容值檢測電路2，電容值檢測電路 2係再連接至第二觸控元件mb。該第二觸控元件mb係鄰 近於第一觸控元件111a。 本發明之第一觸控元件llla係用以接收一感應電場訊 號’當使用者以手指接觸第一觸控元件丨1丨a、或第二觸控 201224899 π件mb時，第一觸控元件1Ua係接收有人體的感應電場 Λ唬。一般而言，該感應電場訊號的訊號來源同電力系統 的接地的中性線，相當於一頻率為或的交流訊 號。當第一觸控元件1113接收到人體的感應電場時，由於 第一觸控7C件Η】b鄰近於第一觸控元件ma，故第二觸控 凡件1 1 1 b亦同步接收有感應電場訊號。 接著，請參考圖2，其係本發明感應電場訊號' 零電位 觸發電路12輸出訊號、及延遲電路丨3輸出訊號之對應圖。 如圖所示，s感應電場訊號為正半週時，零電位觸發電路 1 2之輸出讯唬為高電位，當感應電場訊號為負半週時，零 電4觸發電路之輸出sfl號為低電位，當感應電場訊號為零 電位時’零電位觸發電路之輸出訊號為上昇緣、或下降緣。 延遲電路丨3係將零電位觸發電路12之輸出訊號延遲一時間 月。電容檢測電路2係根據延遲電路j 3 、或下降緣，以對第二觸控元件u ! b 間隔後輸出。較诖地，該時間間隔為1/8T至3/8T，其中，τ 為感應電場訊號之调湘。 带令仏.，β·ϊ咖从a - — 之輸出訊號之上昇緣、 進行電容值檢測。[Embodiment] Please refer to FIG. 1 , which is a circuit diagram of a preferred embodiment of the present invention. The capacitive sensing device 1 of the present invention includes: a first touch The control element 111a, a second touch element mb' - impedance device 112, a differential amplifier 113, a zero potential trigger circuit, and a delay · 13. The differential amplifier 113 includes a first input terminal H3a, a second input terminal 113b', and an output terminal H3c. The first input terminal 1 3aiT is electrically connected to the first touch component 丨丨丨a, the second input terminal 丨1% is connected to the ground, and the output terminal i13c is electrically connected to the zero potential trigger circuit 12. The impedance device 1 12 is electrically connected to the first input terminal 1 1 3a of the differential amplifier n 3 and the second input terminal 丨丨 3b. In addition, the delay circuit 13 is electrically connected to the zero potential trigger circuit 丨2 and the capacitance value detecting circuit 2, and the capacitance value detecting circuit 2 is reconnected to the second touch element mb. The second touch element mb is adjacent to the first touch element 111a. The first touch element 111a of the present invention is configured to receive an inductive electric field signal 'when the user touches the first touch element 丨1丨a or the second touch 201224899 π piece mb with a finger, the first touch element The 1Ua system receives the induced electric field of the human body. In general, the signal source of the inductive electric field signal is the same as the neutral line of the ground of the power system, which is equivalent to an alternating current signal of frequency. When the first touch element 1113 receives the induced electric field of the human body, since the first touch 7C is adjacent to the first touch element ma, the second touch object 1 1 1 b is also synchronously received and sensed. Electric field signal. Next, please refer to FIG. 2, which is a corresponding diagram of the output signal of the induced electric field signal 'zero potential trigger circuit 12 and the output signal of the delay circuit 丨3 of the present invention. As shown in the figure, when the s induction electric field signal is positive half cycle, the output signal of the zero potential trigger circuit 12 is high, and when the induced electric field signal is negative half cycle, the output sfl of the zero electric 4 trigger circuit is low. Potential, when the induced electric field signal is zero potential, the output signal of the zero potential trigger circuit is the rising edge or the falling edge. The delay circuit 丨3 delays the output signal of the zero potential trigger circuit 12 by one month. The capacitance detecting circuit 2 is outputted after the second touch elements u ! b are spaced apart according to the delay circuit j 3 or the falling edge. More desirably, the time interval is 1/8T to 3/8T, where τ is the adjustment of the induced electric field signal. With the 仏., β·ϊ coffee from the rising edge of the output signal of a - -, the capacitance value is detected.
里測’皆可達到類似的效果。 201224899 由於感應電場訊號在正、負半週的峰值區域，上下兩 端的變動最為平緩’當電容檢測電路2使用相對大小作為判 斷時’選在感應，電場訊號的峰值區《，所檢測出的電容值 受電場的影響變化較小，並且可測得較大的電容值變化。Similar results can be achieved in the test. 201224899 Since the induced electric field signal is in the peak area of the positive and negative half cycles, the fluctuations of the upper and lower ends are the most gradual. 'When the capacitance detecting circuit 2 uses the relative size as the judgment, 'select the peak area of the induction, electric field signal, the detected capacitance The value is less affected by the electric field and a larger change in capacitance can be measured.
由上述可知，本發明透過感應電場訊號作為來考訊號 以決定量測的時機，無論就目的、手段及功效，均顯示： 迥異於習知技術之特徵，極具實用價值。惟應注意的是， 上述貫施例僅係為了方便說明而舉例而已，本發明所主張 之權利範圍自應以申請專利範圍所述為準，而非僅限於： 【圖式簡單說明】 圖1係本發明一較佳實施例之電路架構圖。 圖2ir、本舍明一較佳實施例之輸出訊號對應圖。 【主要元件符號說明】 1 電容式觸控裝置 12 零電位觸發電路 111a 第一觸控元件 112 15且抗裝置 113a 第一輸入端 113c 輪出端 2 電容值檢測電路 13 延遲電路 1 1 1 b第二觸控元件 1 1 3 差動放大器 1 1 3 b第二輸入端 A，B 位置It can be seen from the above that the present invention uses the inductive electric field signal as the reference signal to determine the timing of the measurement, regardless of the purpose, means and efficacy, and shows: the characteristics of the prior art are extremely practical. It should be noted that the above-mentioned embodiments are only for the convenience of description, and the scope of the claims should be based on the scope of the patent application, and is not limited to: [Simple description] Figure 1 A circuit architecture diagram of a preferred embodiment of the present invention. FIG. 2 is a diagram showing an output signal corresponding to a preferred embodiment of the present invention. [Main component symbol description] 1 Capacitive touch device 12 Zero potential trigger circuit 111a First touch element 112 15 and anti-device 113a First input end 113c Round end 2 Capacitance value detecting circuit 13 Delay circuit 1 1 1 b Two touch elements 1 1 3 differential amplifier 1 1 3 b second input A, B position