201229831 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種價測裝置，特別是指-種觸控債 測裝置。 【先前技術】 參閱圖1’現有的—種觸控制裝置，如美國專利號碼 5374787所’適用於偵測―觸控板（圖未示）是否被觸碰 。該觸控板包括多條電容值受觸碰影響的感應線。該觸控 ® m置利用多個電荷積分電路1分別量測該等感應線的 電容值。每一電荷積分電路1包括：個電容u、：個㈣ 源12及九個開關13 ’其中’該等開關13受控制在導通及 不導通_換’使得該等電流源12對相對應的該感應線及 該等電谷11進行充放電，導致該等電容η的電壓反應該感 應線之電★值’ 使得該等電容i i的電壓被平均簡單來 說，就是利用多次電荷轉移來得到該平均電壓。 然而，5亥等開關13的切換會引入雜訊來干擾電荷轉移 籲 ’加上感應線本身的電阻值會產生電廢降，導致該平均電 壓無法精確反應感應線的電容值變化，因此，在後續利用 該平均電壓來判斷觸控板是否被觸碰時容易發生誤判。 【發明内容】 因此，本發明之目的，即在提供一種可以解決上述問 題的觸控偵測裝置。 於是’本發明觸控偵測裝置’適用於電連接一觸控板 ，該觸控板包括複數沿一第一方向排列的第一感應線，及 201229831 異:該第一方向的第二方向排列的第二感應線 第一感應線具有相反的一第一端及—第二端 ，且其頻率響應受觸碰影響而改變，該觸㈣測裝置：含 一驅動單元及一量測單元。 罝匕3 该驅動單元電連接於該等第一、第二感應線的第一端 ’並輸出-驅動訊號於該等第―、第二感應線中的一選定 感應線的第-端’該量測單元電連接於該等第一、第二感 應線的，二端’並於該敎感應線的第二端接收—感應訊 號並量測該感應訊號的一峰對峰值。 本發明之功效在於：藉由利用該選定感應線的頻率響 …特〖生來得到忐反應該選定感應線是否被觸碰的該峰對峰 值°玄觸控偵測裝置沒有電荷轉移易受雜訊干擾的問題， 且所得到的該峰對峰值也不會受該選定感應線本身的電阻 值所產生的電壓降影響而導致無法精確反應是否被觸碰。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖2、3，本發明觸控偵測裝置之較佳實施例適用 於電連接一觸控板2 ’該觸控板2包括複數沿一第一方向X 排列的第一感應線21，及複數沿一垂直於該第一方向X的 第二方向Y排列的第二感應線22 (圖2中畫出該觸控板2 包括四條第一感應線21及三條第二感應線22的情況），每 一第一、第二感應線21、22具有相反的一第一端211、221 201229831 及-第二端212、222,且各自具有-與低通滤波器相類似 的頻率響應特性，並受觸碰影響而改變其頻率響應，节 控谓測裝置包含-驅動單元3、—量測單元4，及—判斷^ 元5。 旱201229831 VI. Description of the Invention: [Technical Field] The present invention relates to a price measuring device, and more particularly to a touch sensing device. [Prior Art] Referring to Fig. 1', a conventional touch control device, such as U.S. Patent No. 5,374,787, is adapted to detect whether a touch panel (not shown) is touched. The touch panel includes a plurality of sensing lines whose capacitance values are affected by touch. The touch control m uses a plurality of charge integration circuits 1 to measure the capacitance values of the sense lines, respectively. Each of the charge integration circuits 1 includes: a capacitor u, a (four) source 12, and nine switches 13 'where the switches 13 are controlled to be turned on and not turned on - such that the current sources 12 correspond to the pair The sensing line and the electric valley 11 are charged and discharged, so that the voltage of the capacitors η reacts with the electric value of the sensing line, so that the voltage of the capacitors ii is averaged simply by using multiple charge transfer to obtain the Average voltage. However, the switching of the switch 13 such as 5 hai will introduce noise to interfere with the charge transfer. The addition of the resistance value of the induction line itself will cause an electrical waste drop, which causes the average voltage to not accurately reflect the change in the capacitance value of the induction line. Therefore, Subsequent use of the average voltage to determine whether the touchpad is touched is prone to misjudgment. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a touch detection device that solves the above problems. Therefore, the touch detection device of the present invention is adapted to electrically connect a touch panel, the touch panel includes a plurality of first sensing lines arranged along a first direction, and 201229831: a second direction of the first direction The first sensing line of the second sensing line has an opposite first end and a second end, and the frequency response thereof is changed by the touch. The touch (four) measuring device comprises a driving unit and a measuring unit.驱动3 the driving unit is electrically connected to the first ends of the first and second sensing lines and outputs a driving signal to the first end of a selected sensing line of the second and second sensing lines. The measuring unit is electrically connected to the second and second sensing lines of the first and second sensing lines, and receives the sensing signal at the second end of the sensing line and measures a peak-to-peak value of the sensing signal. The effect of the invention is that the peak of the selected sensing line is touched by using the frequency of the selected sensing line, and the peak of the selected sensing line is touched. The problem of interference, and the peak-to-peak value obtained is not affected by the voltage drop caused by the resistance value of the selected sensing line itself, so that it is impossible to accurately react whether it is touched. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIGS. 2 and 3, a preferred embodiment of the touch detection device of the present invention is suitable for electrically connecting a touch panel 2'. The touch panel 2 includes a plurality of first sensing lines 21 arranged along a first direction X, and a plurality of second sensing lines 22 arranged along a second direction Y perpendicular to the first direction X (in the case of FIG. 2, the touch panel 2 includes four first sensing lines 21 and three second sensing lines 22) Each of the first and second sensing lines 21, 22 has opposite first ends 211, 221 201229831 and - second ends 212, 222, and each has a frequency response characteristic similar to that of the low pass filter, and The frequency response is changed by the touch, and the control device includes a drive unit 3, a measurement unit 4, and a determination unit 5. drought
該驅動單元3電連接於該等第一、第二感應線21 ' ^ 的第知211、221 ’並輸出一驅動訊號6於該等第―、第 二感應線21、22中的一選定感應線的第一端。於本實施例 中，該選定感應線是該驅動單元3以循環方式指定，該驅 動訊號6 $具有至少一脈衝的方波訊號，且於每一週期中 具有-下降緣61及―上升緣62，但是該驅動訊號6也可以 為弦波訊號，而同樣具有相對應的下降緣61及上升緣Μ。 參閱圖3、4、5’該選定感應線在沒有被觸碰時的頻率 響應具有-初始通過頻# Wp及—初始停止頻率％，在本 實施例中，該驅動訊號6的頻率^介於該初始通過頻率 Wp及該初始停止頻率ws之間。 參閱圖2、6’該量測單元4電連接於該等第一、第二 感應線2卜22的第二端212、222，且電連接於該驅動單元 3’並於該選定感應線的第二端接收—感應訊號7，並量測 該感應訊號7 .的一峰對峰值v 。 該感應訊號7於每-週期中具有—波峰71及一波谷72 ’在本實施例中’該量測單元4是根據該驅動錢6的下 降緣61及上升緣62分難該感應訊號7的波峰71及波谷 72進行取樣，並對取樣到的訊號進行類比至數位轉換，以 得到數位化後的-波峰值及一波谷值，且計算該波峰值及 201229831 該波谷值的差異，以得到該峰對峰值vpp。 該判斷單元5電連接於該驅動單元3及該量測單元4 , 並根據該峰對峰值Vpp判斷該選定感應線是否被觸碰。 參閱圖2、5、6,當該驅動單元3對該選定感應線輸入 該驅動訊號6且該選定感應線沒被碰觸時，由於該選定感 應線自身具有的低通濾波特性，因此使頻率Wi介於該初始 通過頻率wp及該初始停止頻率Ws之間的該驅動訊號6在 經過該選定感應線後’頻譜能量會產生衰減，該驅動訊號6 的頻譜如圖4所示，該驅動訊號6經該選定感應線衰減所 產生的該感應訊號7之頻譜及波形分別如圖5、6所示，該 判斷單元5以該量測單元4此時量測到的該峰對峰值Vpp作 為一參考值。The driving unit 3 is electrically connected to the first and second sensing lines 21'^, and outputs a driving signal 6 to the selected one of the second and second sensing lines 21, 22. The first end of the line. In the embodiment, the selected sensing line is specified by the driving unit 3 in a cyclic manner. The driving signal 6 $ has a square wave signal of at least one pulse, and has a falling edge 61 and a rising edge 62 in each cycle. However, the driving signal 6 can also be a sine wave signal, and also has a corresponding falling edge 61 and a rising edge Μ. Referring to Figures 3, 4, and 5', the frequency response of the selected sensing line when it is not touched has - initial pass frequency # Wp and - initial stop frequency %. In this embodiment, the frequency of the drive signal 6 is between The initial pass frequency Wp and the initial stop frequency ws. 2, 6', the measuring unit 4 is electrically connected to the second ends 212, 222 of the first and second sensing lines 2, and is electrically connected to the driving unit 3' and is connected to the selected sensing line. The second end receives the sensing signal 7, and measures a peak-to-peak value v of the sensing signal 7. The sensing signal 7 has a peak 71 and a valley 72' in each cycle. In the present embodiment, the measuring unit 4 divides the sensing signal 7 according to the falling edge 61 and the rising edge 62 of the driving money 6. The peak 71 and the trough 72 are sampled, and the sampled signal is analog-to-digital converted to obtain a digitized-wave peak and a valley value, and the difference between the peak value and the 201229831 valley is calculated to obtain the difference. Peak to peak vpp. The determining unit 5 is electrically connected to the driving unit 3 and the measuring unit 4, and determines whether the selected sensing line is touched according to the peak value Vpp. Referring to FIGS. 2, 5, and 6, when the driving unit 3 inputs the driving signal 6 to the selected sensing line and the selected sensing line is not touched, the frequency is selected due to the low-pass filtering characteristic of the selected sensing line. The driving signal 6 between the initial pass frequency wp and the initial stop frequency Ws passes through the selected sensing line, and the spectrum energy is attenuated. The spectrum of the driving signal 6 is as shown in FIG. 4, and the driving signal is as shown in FIG. 6 The spectrum and waveform of the inductive signal 7 generated by the attenuation of the selected sensing line are respectively shown in FIGS. 5 and 6. The determining unit 5 uses the peak-to-peak value Vpp measured by the measuring unit 4 at this time as a Reference.
參閲圖2、7、8,當該驅動單元3對該選定感應線輸入 該驅動訊E 6且該選定感應線受到觸碰時，該選定感應線 的頻率響應會改變，在本實施例中，該觸控板2為一自感 型電容式觸控板，該選定感應線的電容值會因為觸碰而變 大，而使該初始通過頻率Wp及該初始停止頻率Ws分別往 低頻方向移動到一觸碰通過頻率Wi及一觸碰停止頻率 ’該驅動簡6經朗定感應線衰減所產生的該感應訊號7 之頻谱及波形分別如圖7、8所示，該感應簡7的峰對峰 值vpp會因碰觸而變小。因此，該判斷單元5在該峰對峰值 VPP明顯小於該參考值時（例如兩者的差異大於一預設的門 檻值），判定該選定感應線受到觸碰，而在該峰對峰值Vpp 與該參考值的差異列顯時（例如兩者的差異小於該預S 201229831 的門檻值），判定該選定感應線沒被觸碰。 值得注意的是，該驅動訊號6的頻率也可以是介於該 觸碰通過頻率Wl及該初始通過頻率％之間，只要該感應 訊號7的峰對峰值變化足供判斷即可。 在本實施例中，該觸控偵測裝置是實現在一積體電路 中。該觸控谓測裝置也能以其它方式實現，不以此處所述 為限。 綜上所述，本實施例利用頻率響應特性來得到能反應 該選定感應線是否被觸碰的該峰對峰值Vpp，具備以下優點 1. 沒有電荷轉移易受雜訊干擾的問題。 2. 所得到的該峰對峰值Vpp不會受該選定感應線本身的 電阻值所產生的電壓降料㈣致無法精確反應是否被觸 碰〇 3. 該驅動單元3的驅動方式簡單。 4. 忒感應訊號7即時隨著該驅動訊號6反應。 —^該驅動訊號6及該感應訊號7具有相同的頻率因此 容易得到該感應訊號7的峰對峰值。 值得-提的是，在使用不同的觸控板2時（例如該觸 控板2為―互感型電容式觸控板），該選定感應線的電容值 也:以是因為觸碰而變小’而使該初始通過頻帛％及該初 始停止頻率^往高頻方向移動，導致該驅動訊號6在經過 :選定感應線後頻譜能量增強，進而使所產生的該感應訊 〜7的峰料值增大，而該⑽單元$依然能根據該岭對 201229831 峰值判斷出該選定感應線是否受到觸碰。 惟以上所述者，僅為本發明之較佳實施例而已，當不 旎以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一現有的觸控偵測裝置的一電荷積分電路的電 路圖；. 圖2是本發明觸控偵測裝置的一較佳實施例的示意圖 9 圖3是該較佳實施例的一驅動訊號的波形圖； 圖4是該較佳實施例的該驅動訊號的頻譜圖； 圖5是該較佳實施例的一感應訊號於一選定感應線未 受到觸碰時的頻譜圖； 圖6是該較佳實施例的該感應訊號於該選定感應線未 受到觸碰時的波形圖； 圖7是該較佳實施例的該感應訊號於該選定感應線受 到觸碰時的頻譜圖；及 圖8是該較佳實施例的該感應訊號於該選定感應線受 到觸碰時的波形圖。 201229831 【主要元件符號說明】 2 ..........觸控板 21 .........第一感應線 211 .......第一端 212 .......第二端 22 .........第二感應線 221 .......第一端 222 .......第二端 3 ..........驅動單元 4 ..........量測單元 5 ..........判斷單元 6 ..........驅動訊號 61.........下降緣 62·...· •…上升緣 7…… •…感應訊號 71 •…波峰 72····. ....波谷 VPp ··· —峰對峰值 Wj ··· •…驅動訊號的頻率 wp…· —初始通過頻率 Ws ···· •…初始停止頻率 Wj ···· •…觸碰通過頻率 w2 ···· •…觸碰停止頻率 X…… …·第一方向 Y…… •…第二方向Referring to FIGS. 2, 7, and 8, when the driving unit 3 inputs the driving signal E 6 to the selected sensing line and the selected sensing line is touched, the frequency response of the selected sensing line changes, in this embodiment. The touch panel 2 is a self-inductive capacitive touch panel. The capacitance value of the selected sensing line is increased due to the touch, and the initial passing frequency Wp and the initial stopping frequency Ws are respectively moved to the low frequency direction. To the touch frequency and the touch stop frequency, the spectrum and waveform of the sensing signal 7 generated by the attenuation of the sensing line are as shown in FIGS. 7 and 8, respectively. The peak-to-peak vpp will become smaller due to the touch. Therefore, when the peak-to-peak VPP is significantly smaller than the reference value (for example, the difference between the two is greater than a predetermined threshold), the determining unit 5 determines that the selected sensing line is touched, and the peak-to-peak Vpp is When the difference of the reference values is displayed (for example, the difference between the two is less than the threshold value of the pre-S 201229831), it is determined that the selected sensing line is not touched. It should be noted that the frequency of the driving signal 6 may also be between the touch passing frequency W1 and the initial passing frequency %, as long as the peak-to-peak variation of the sensing signal 7 is sufficient for judgment. In this embodiment, the touch detection device is implemented in an integrated circuit. The touch presupposition device can also be implemented in other ways, not limited to those described herein. In summary, the present embodiment utilizes the frequency response characteristic to obtain the peak-to-peak value Vpp which can reflect whether the selected sensing line is touched, and has the following advantages: 1. There is no problem that the charge transfer is susceptible to noise interference. 2. The obtained peak-to-peak Vpp is not affected by the voltage drop caused by the resistance value of the selected sensing line itself. (4) It is impossible to accurately react whether it is touched. 3. The driving mode of the driving unit 3 is simple. 4. The 忒 sensing signal 7 reacts immediately with the drive signal 6. The driving signal 6 and the sensing signal 7 have the same frequency, so that the peak-to-peak value of the sensing signal 7 is easily obtained. It is worth mentioning that when using different touchpads 2 (for example, the touchpad 2 is a mutual-inductive capacitive touchpad), the capacitance of the selected sensing line is also: it is made smaller by touch. 'The initial pass frequency 及% and the initial stop frequency ^ move to the high frequency direction, causing the driving signal 6 to pass through: the selected sensing line after the spectral energy is enhanced, thereby causing the generated peak of the sensing signal ~7 The value increases, and the (10) unit $ can still determine whether the selected sensing line is touched according to the peak of 201229831 according to the ridge. However, the above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention. All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a charge integration circuit of a conventional touch detection device. FIG. 2 is a schematic diagram of a preferred embodiment of the touch detection device of the present invention. FIG. FIG. 4 is a frequency spectrum diagram of the driving signal of the preferred embodiment; FIG. 5 is a spectrum diagram of the driving signal of the preferred embodiment; FIG. 5 is a schematic diagram of the sensing signal of the preferred embodiment when a selected sensing line is not touched. FIG. 6 is a waveform diagram of the sensing signal in the preferred embodiment when the selected sensing line is not touched; FIG. 7 is the sensing signal of the preferred embodiment when the selected sensing line is touched. A spectrogram; and FIG. 8 is a waveform diagram of the sensing signal of the preferred embodiment when the selected sensing line is touched. 201229831 [Description of main component symbols] 2 .......... touchpad 21 .........first sensing line 211 .... first end 212 ... .... second end 22 .... second sensing line 221 .... first end 222 .... second end 3 ... .... drive unit 4 ..... measurement unit 5 .......... judgment unit 6 ..... drive signal 61... ...falling edge 62·...· •... rising edge 7... •...sensing signal 71 •...crest 72····..... trough VPp ··· —peak-to-peak Wj · ·· •...The frequency of the drive signal wp...·—The initial pass frequency Ws ···· •...The initial stop frequency Wj ···· •...Touch pass frequency w2 ···· •...Touch stop frequency X... ...·first direction Y... •...second direction