TWI396125B - Coupling capacitance eliminating apparatus and method - Google Patents
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Description
本發明係與觸控面板有關，特別是關於一種能夠動態調整觸控所造成之耦合強度變化以消除電容式觸控面板與機構環境間的電容耦合效應之耦合電容消除裝置及方法。The present invention relates to a touch panel, and more particularly to a coupling capacitor eliminating device and method capable of dynamically adjusting a coupling strength change caused by a touch to eliminate a capacitive coupling effect between a capacitive touch panel and a mechanism environment.
一般而言，觸控面板依照其感應原理的不同，大致可分為電阻式、電容式、超音波式、光學(例如紅外線)式等不同類型。其中，電容式觸控面板由於只需輕輕觸碰即能感應，並且手指與觸控面板之間的接觸幾乎不會產生磨損，不僅性能穩定且使用壽命長，故已經被廣泛地應用於各式電子產品中。In general, touch panels can be roughly classified into different types such as resistive, capacitive, ultrasonic, and optical (for example, infrared) according to their different sensing principles. Among them, the capacitive touch panel can be sensed by only touching a light touch, and the contact between the finger and the touch panel hardly causes wear, and the utility model has the advantages of stable performance and long service life, and thus has been widely applied to each. In electronic products.
請參照圖一A及圖一B，圖一A及圖一B係繪示傳統的電容式觸控感測裝置1及其控制訊號輸入時序圖。如圖一A及圖一B所示，傳統的電容式觸控偵測裝置1係採用由X軸方向至Y軸方向(亦可為由Y軸方向至X軸方向)循序由訊號輸入模組12輸入脈衝方波至觸控面板上之各個觸控墊X1 ~X6 以及Y1 ~Y6 ，再由感測模組14量測物體(例如手指或觸控筆尖等)接觸面板時所產生的寄生電容變化，並將電容變化量加以量化成數值，再計算出物體於面板上所形成之觸控點的X及Y座標位置。Please refer to FIG. 1A and FIG. 1B. FIG. 1A and FIG. 1B show a conventional capacitive touch sensing device 1 and its control signal input timing diagram. As shown in FIG. 1A and FIG. 1B, the conventional capacitive touch detection device 1 adopts a signal input module from the X-axis direction to the Y-axis direction (also from the Y-axis direction to the X-axis direction). 12 input pulse square wave to each of the touch pads X 1 ~X 6 and Y 1 ~Y 6 on the touch panel, and then the sensing module 14 measures the object (such as a finger or a stylus tip) to touch the panel The generated parasitic capacitance changes, and the capacitance change amount is quantized into a numerical value, and then the X and Y coordinate positions of the touch points formed on the panel are calculated.
然而，當實際應用電容式觸控面板時，由於電容式觸控面板對於機構環境之影響較為靈敏，亦即在不同的機構環境下會產生不同的電容耦合狀態，所以若欲準確地量測電容的變化，勢必需要對電容偵測電路進行調整。請參照圖二，圖二係繪示電容式觸控面板與機構間所產生之電容耦合效應的示意圖。However, when a capacitive touch panel is actually applied, since the capacitive touch panel is sensitive to the influence of the mechanism environment, that is, different capacitive coupling states are generated in different mechanism environments, if the capacitance is to be accurately measured, The change is bound to require adjustment of the capacitance detection circuit. Please refer to FIG. 2, which is a schematic diagram showing the capacitive coupling effect between the capacitive touch panel and the mechanism.
如圖二所示，由於目前一般的電容式觸控面板20大多設置於液晶顯示模組(Liquid Crystal display Module,LCM)22之上，電容式觸控面板20與液晶顯示模組22之機構間將會產生電容耦合效應，因而導致電容變化的量測上出現明顯的誤差。舉例而言，假設使用者觸控的是電容式觸控面板20之觸控墊Y1，但其他觸控墊Y2~Y6亦會同時偵測到電容值之變化，而這些Y2~Y6之電容值的變化即是由於液晶顯示模組22與電容式觸控面板20之間的電容耦合效應所導致。As shown in FIG. 2 , the conventional capacitive touch panel 20 is disposed on the liquid crystal display module (LCM) 22 , and between the capacitive touch panel 20 and the liquid crystal display module 22 . A capacitive coupling effect will occur, resulting in significant errors in the measurement of the change in capacitance. For example, if the user touches the touch pad Y1 of the capacitive touch panel 20, the other touch pads Y2~Y6 also detect the change of the capacitance value, and the capacitance values of the Y2~Y6 are The change is caused by the capacitive coupling effect between the liquid crystal display module 22 and the capacitive touch panel 20.
目前雖已採用在液晶顯示模組22與電容式觸控面板20之間加入一層約0.05公分厚的不導電膠膜之方式來改善電容式觸控面板20由於機構所產生之電容耦合干擾，然而不僅額外增加產品之厚度及成本，整個觸控顯示裝置還需針對電容式觸控面板20整合至不同的液晶顯示模組22之不同情況進行相對應的調整，相當不便且降低生產之效率。At present, a non-conductive film of about 0.05 cm thick is added between the liquid crystal display module 22 and the capacitive touch panel 20 to improve the capacitive coupling interference of the capacitive touch panel 20 due to the mechanism. Not only the thickness and cost of the product are additionally increased, but the entire touch display device needs to be adjusted correspondingly for different situations in which the capacitive touch panel 20 is integrated into different liquid crystal display modules 22, which is rather inconvenient and reduces the efficiency of production.
因此，本發明提出一種耦合電容消除裝置及耦合電容消除方法，以解決上述問題。Therefore, the present invention proposes a coupling capacitor eliminating device and a coupling capacitor eliminating method to solve the above problems.
根據本發明之一具體實施例為一種耦合電容消除裝置。該耦合電容消除裝置係應用於一電容式觸控面板，並且該電容式觸控面板包含複數個觸控墊。於此實施例中，該耦合電容消除裝置包含一觸控感測模組及一耦合電容消除模組。其中，該觸控感測模組耦接至該電容式觸控面板；該耦合電容消除模組耦接至該觸控感測模組。當一觸控點形成於該電容式觸控面板上時，該觸控感測模組分別偵測該等觸控墊中之每一個觸控墊的一電容變化值。該耦合電容消除模組係用以依照一預設規則自該等電容變化值中決定一電容耦合值，並根據該電容耦合值調整該等電容變化值以產生對應於該等觸控墊之複數個調整後觸控電容變化值。藉此，該耦合電容消除裝置即能夠動態調整觸控所造成之電容變化值，以消除該電容式觸控面板與鄰近機構環境之間所產生之電容耦合效應。According to an embodiment of the invention, a coupling capacitor cancellation device is provided. The coupling capacitor elimination device is applied to a capacitive touch panel, and the capacitive touch panel includes a plurality of touch pads. In this embodiment, the coupling capacitor eliminating device includes a touch sensing module and a coupling capacitor eliminating module. The touch sensing module is coupled to the capacitive touch panel; the coupling capacitor eliminating module is coupled to the touch sensing module. When a touch point is formed on the capacitive touch panel, the touch sensing module detects a capacitance change value of each of the touch pads. The coupling capacitor elimination module is configured to determine a capacitance coupling value from the capacitance change values according to a preset rule, and adjust the capacitance change values according to the capacitance coupling value to generate a plurality of capacitance pads corresponding to the touch pads. The adjusted value of the touch capacitance after adjustment. Therefore, the coupling capacitor eliminating device can dynamically adjust the capacitance variation caused by the touch to eliminate the capacitive coupling effect between the capacitive touch panel and the adjacent mechanism environment.
根據本發明之另一具體實施例為一種耦合電容消除方法。該耦合電容消除方法係應用於一電容式觸控面板，並且該電容式觸控面板包含複數個觸控墊。於此實施例中，該方法包含下列步驟：(a)當一觸控點形成於該電容式觸控面板上時，分別偵測該等觸控墊中之每一個觸控墊的一電容變化值；(b)依照一預設規則自該等電容變化值中決定一電容耦合值；(c)根據該電容耦合值調整該等電容變化值以產生對應於該等觸控墊之複數個調整後觸控電容變化值。Another embodiment of the present invention is a coupling capacitor cancellation method. The coupling capacitor elimination method is applied to a capacitive touch panel, and the capacitive touch panel includes a plurality of touch pads. In this embodiment, the method includes the following steps: (a) detecting a change in capacitance of each of the touch pads when a touch point is formed on the capacitive touch panel (b) determining a capacitive coupling value from the capacitance change values according to a predetermined rule; (c) adjusting the capacitance change values according to the capacitance coupling value to generate a plurality of adjustments corresponding to the touch pads; The value of the rear touch capacitance change.
相較於先前技術，根據本發明之耦合電容消除裝置及耦合電容消除方法能夠動態調整觸控所造成之耦合強度變化以消除該電容式觸控面板與鄰近機構環境之間所產生之電容耦合效應。即使對於機構環境之影響較為靈敏的電容式觸控面板於實際應用時需裝設在不同的機構上，因而產生不同的電容耦合效應，透過本發明提出之耦合電容消除裝置及耦合電容消除方法即可利用每回合計算觸控所產生之電容耦合值的計算結果即時且動態地調整觸控所造成之耦合強度變化，不僅實現方式相當簡易，亦可大幅改善先前技術中每次應用時均需進行機構調整及計算修正所造成之不便及困擾，藉以實現容易操作且準確度高之電容式觸控偵測。Compared with the prior art, the coupling capacitor eliminating device and the coupling capacitor eliminating method according to the present invention can dynamically adjust the coupling strength variation caused by the touch to eliminate the capacitive coupling effect between the capacitive touch panel and the adjacent mechanism environment. . Even a capacitive touch panel that is more sensitive to the influence of the mechanism environment needs to be installed on different mechanisms in practical applications, thereby generating different capacitive coupling effects. The coupling capacitor eliminating device and the coupling capacitor eliminating method proposed by the present invention are The calculation result of the capacitive coupling value generated by the touch calculation can be used to instantly and dynamically adjust the coupling strength change caused by the touch, which is not only easy to implement, but also greatly improves the need for each application in the prior art. Inconvenience and trouble caused by mechanism adjustment and calculation correction, to achieve easy-to-operate and accurate capacitive touch detection.
關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.
本發明之一具體實施例為一種耦合電容消除裝置。於此實施例中，該耦合電容消除裝置係應用於一觸控顯示裝置之一電容式觸控面板，並且該電容式觸控面板包含複數個觸控墊。該觸控顯示裝置能夠感測任何物體於該電容式觸控面板上所形成之至少一觸控點的位置。實際上，於該電容式觸控面板上形成該至少一觸控點之物體並無特定之限制，一般而言，可以是使用者的手指或觸控筆尖，但不以此為限。One embodiment of the present invention is a coupling capacitor cancellation device. In this embodiment, the coupling capacitor elimination device is applied to a capacitive touch panel of a touch display device, and the capacitive touch panel includes a plurality of touch pads. The touch display device can sense the position of at least one touch point formed by any object on the capacitive touch panel. In fact, the object for forming the at least one touch point on the capacitive touch panel is not particularly limited. Generally, it may be a user's finger or a stylus tip, but is not limited thereto.
請參閱圖三，圖三係繪示本實施例之應用於電容式觸控面板的耦合電容消除裝置之功能方塊圖。如圖三所示，耦合電容消除裝置3包含觸控感測模組30、耦合電容消除模組32及座標計算模組34。其中，觸控感測模組30分別耦接至觸控面板4及耦合電容消除模組32；耦合電容消除模組32耦接至座標計算模組34。Referring to FIG. 3, FIG. 3 is a functional block diagram of a coupling capacitor eliminating device applied to a capacitive touch panel according to the embodiment. As shown in FIG. 3 , the coupling capacitor elimination device 3 includes a touch sensing module 30 , a coupling capacitor elimination module 32 , and a coordinate calculation module 34 . The touch sensing module 30 is coupled to the touch panel 4 and the coupling capacitor eliminating module 32. The coupling capacitor eliminating module 32 is coupled to the coordinate computing module 34.
於實際應用中，由於觸控面板4係一電容式觸控面板，故可假設觸控面板4如同圖一A所示同樣包含(6×6)個觸控點、六組第一觸控墊組Y1~Y6及六組第二觸控墊組X1~X6，其中第一觸控墊組Y1~Y6依序沿著Y方向排列，而第二觸控墊組X1~X6則依序沿著X方向排列，但不以此為限。值得注意的是，觸控面板4所包含的觸控墊組及觸控點的數目並不以此例為限，端視實際應用時之需求而定。In the actual application, since the touch panel 4 is a capacitive touch panel, it can be assumed that the touch panel 4 also includes (6×6) touch points and six groups of first touch pads as shown in FIG. Groups Y1~Y6 and six groups of second touch pad groups X1~X6, wherein the first touch pad groups Y1~Y6 are sequentially arranged along the Y direction, and the second touch pad groups X1~X6 are sequentially along Arranged in the X direction, but not limited to this. It should be noted that the number of the touch pad groups and the touch points included in the touch panel 4 is not limited to this example, and depends on the requirements of the actual application.
接下來，將就耦合電容消除裝置3之運作情形進行介紹。當觸控點形成於觸控面板4時，觸控感測模組30將分別偵測觸控面板4之每一觸控墊的電容變化值。接著，耦合電容消除模組32將依照一預設規則自所有觸控墊之電容變化值中決定一電容耦合值，並根據該電容耦合值調整所有電容變化值以產生對應於所有觸控墊之調整後觸控電容變化值。Next, the operation of the coupling capacitor eliminating device 3 will be described. When the touch point is formed on the touch panel 4 , the touch sensing module 30 detects the capacitance change value of each touch pad of the touch panel 4 . Then, the coupling capacitor elimination module 32 determines a capacitance coupling value from the capacitance change values of all the touch pads according to a preset rule, and adjusts all the capacitance change values according to the capacitance coupling value to generate corresponding touch pads. Adjust the value of the touch capacitance change.
於此實施例中，耦合電容消除模組32所採用之預設規則係與該等觸控墊中具有該等電容變化值中之一最大電容變化值的一觸控墊有關，但不以此為限。於實際應用中，該預設規則可能具有不同的型式，端視電容式觸控面板之實際使用需求而定。以下將分別透過不同的實例就不同型式之預設規則進行探討。In this embodiment, the preset rule adopted by the coupling capacitor elimination module 32 is related to a touch pad having a maximum capacitance change value among the capacitance change values of the touch pads, but not Limited. In practical applications, the preset rules may have different types depending on the actual use requirements of the capacitive touch panel. The following will discuss the preset rules of different types through different examples.
如表一所示，假設通道(channel)1~通道10分別對應於觸控面板4之10個觸控墊，並且當物體觸碰到觸控面板4時，觸控感測模組30所感測到通道1~10的電容變化值分別如表一所示，若於該預設規則中，所有通道中具有最大電容變化值的通道(亦即通道7)以及其相鄰的通道(亦即通道6及通道8)均不列入判斷電容耦合值之考慮範圍內，因此，於通道1~10之中，僅有通道1~5及通道9~10被列入判斷電容耦合值之考慮範圍內。As shown in Table 1, it is assumed that the channels 1 to 10 respectively correspond to the 10 touch pads of the touch panel 4, and when the object touches the touch panel 4, the touch sensing module 30 senses The capacitance changes to channels 1~10 are shown in Table 1. If the channel has the largest capacitance change value (ie channel 7) and its adjacent channel (ie channel) in the preset rule. 6 and channel 8) are not included in the consideration of the capacitance coupling value. Therefore, among channels 1 to 10, only channels 1 to 5 and channels 9 to 10 are included in the consideration of the capacitance coupling value. .
值得注意的是，於此例中，該預設規則更進一步定義：電容耦合值為列入判斷考慮之所有通道中之電容變化值最大者，也就是具有電容變化值7500之通道9，因此，此回合之電容耦合值即被設定為7500。接著，再將通道1~10的電容變化值分別減去電容耦合值7500，即可有效地消除電容式觸控面板與鄰近機構環境之間所產生之電容耦合效應對於各通道之電容變化值的影響。It is worth noting that, in this example, the preset rule is further defined: the capacitive coupling value is the largest value of the capacitance change in all channels considered for judging, that is, the channel 9 having the capacitance change value of 7500, therefore, The capacitive coupling value for this round is set to 7500. Then, by subtracting the capacitance coupling value of the channels 1~10 by the capacitance coupling value 7500, the capacitance coupling effect generated between the capacitive touch panel and the adjacent mechanism environment can be effectively eliminated. influences.
另一個例子如表二所示，與表一之例子不同的是，此例中之預設規則係定義：電容耦合值為列入判斷考慮之所有通道中之電容變化值的平均值，也就是將通道1~5及通道9~10之電容變化值加以平均後，得到此回合之電容耦合值為6000。接著，再將通道1~10的電容變化值分別減去電容耦合值6000，即可有效地消除電容式觸控面板與鄰近機構環境之間所產生之電容耦合效應對於各通道之電容變化值的影響。Another example is shown in Table 2. Unlike the example in Table 1, the default rule in this example is defined as: the capacitance coupling value is the average value of the capacitance change values in all channels considered for judging, that is, After averaging the capacitance changes of channels 1~5 and channels 9~10, the capacitive coupling value of this round is 6000. Then, by subtracting the capacitance coupling value of the channel 1~10 by the capacitance coupling value 6000, the capacitance coupling effect generated between the capacitive touch panel and the adjacent mechanism environment can be effectively eliminated. influences.
由上述表一及表二所舉之例子可知：於預設規則中，電容耦合值可以是位於具有最大電容變化值之觸控墊的一特定範圍外的所有觸控墊之電容變化值最大者，抑或位於該特定範圍外的所有觸控墊之電容變化值平均值，甚至是其他的條件，並無一定之限制。As can be seen from the examples in Tables 1 and 2 above, in the preset rule, the capacitive coupling value may be the largest capacitance change value of all the touch pads outside a specific range of the touch pad having the largest capacitance change value. Or, the average value of the capacitance change of all the touch pads outside the specific range, or even other conditions, is not limited.
此外，於預設規則中，當電容耦合值被定義為位於具有最大電容變化值之觸控墊之特定範圍外的所有觸控墊之電容變化值最大者時，該特定範圍亦可以涵蓋鄰近該觸控墊且具有該最大電容變化值之一特定比率以上的電容變化值之觸控墊。舉例而言，如表三所示，由於通道7具有最大電容變化值20000，若特定比率設定為50%，則僅有電容變化值小於10000的通道1~5及通道9~10才會被列入判斷電容耦合值之考慮範圍內。實際上，該特定比率可以是系統預設值或由使用者所設定，並無一定之限制。In addition, in the preset rule, when the capacitive coupling value is defined as the largest value of the capacitance change of all the touch pads outside the specific range of the touch pad having the largest capacitance change value, the specific range may also cover the adjacent The touch pad and the touch pad having a capacitance change value above a certain ratio of the maximum capacitance change value. For example, as shown in Table 3, since channel 7 has a maximum capacitance change value of 20000, if a specific ratio is set to 50%, only channels 1~5 and channels 9~10 whose capacitance change value is less than 10000 will be listed. Into the consideration of the capacitance coupling value. In fact, the specific ratio can be a preset value of the system or set by the user without any limitation.
根據本發明之另一具體實施例為一種耦合電容消除方法。於此實施例中，該耦合電容消除方法係應用於一電容式觸控面板，該電容式觸控面板包含複數個觸控墊。實際上，該複數個觸控墊可包含沿著一第一方向排列之複數個第一觸控墊組以及沿著一第二方向排列之複數個第二觸控墊組，並且該第一方向係垂直於該第二方向，但不以此為限。Another embodiment of the present invention is a coupling capacitor cancellation method. In this embodiment, the coupling capacitor elimination method is applied to a capacitive touch panel, and the capacitive touch panel includes a plurality of touch pads. In fact, the plurality of touch pads may include a plurality of first touch pad groups arranged along a first direction and a plurality of second touch pad groups arranged along a second direction, and the first direction It is perpendicular to the second direction, but is not limited thereto.
請參閱圖四，圖四係繪示本實施例之耦合電容消除方法的流程圖。如圖四所示，該耦合電容消除方法包含下列步驟：首先，該方法執行步驟S10，當一觸控點形成於該電容式觸控面板上時，分別偵測該等觸控墊中之每一個觸控墊的一電容變化值。Referring to FIG. 4, FIG. 4 is a flow chart showing a method for eliminating coupling capacitors according to the embodiment. As shown in FIG. 4, the coupling capacitor elimination method includes the following steps: First, the method performs step S10, and when a touch point is formed on the capacitive touch panel, each of the touch pads is separately detected. A capacitance change value of a touch pad.
實際上，於該電容式觸控面板上形成該觸控點之物體並無特定之限制，一般而言，可以是使用者的手指或觸控筆尖，但不以此為限。至於該觸控點形成於該電容式觸控面板上的位置則可能是該等觸控墊中之任一觸控墊，端視形成該觸控點之物體接觸於該電容式觸控面板之位置而定，並無一定之限制。In fact, the object for forming the touch point on the capacitive touch panel is not particularly limited. Generally, it may be a user's finger or a stylus tip, but not limited thereto. The position of the touch point formed on the capacitive touch panel may be any one of the touch pads, and the object forming the touch point is in contact with the capacitive touch panel. There is no limit to the location.
接著，該方法執行步驟S12，依照一預設規則自該等電容變化值中決定一電容耦合值。於此實施例中，該預設規則係與該等觸控墊中具有該等電容變化值中之一最大電容變化值的一觸控墊有關，但不以此為限。於實際應用中，該預設規則可能具有不同的型式，端視電容式觸控面板之實際使用需求而定。以下將分別就該預設規則兩種可能的型式進行探討。Then, the method performs step S12 to determine a capacitive coupling value from the capacitance change values according to a preset rule. In this embodiment, the preset rule is related to a touch pad of the touch pad having one of the capacitance change values, but is not limited thereto. In practical applications, the preset rules may have different types depending on the actual use requirements of the capacitive touch panel. The following two possible types of the preset rules will be discussed separately.
該預設規則的第一種可能型式是：該電容耦合值為位於該觸控墊之一特定範圍外的所有觸控墊之電容變化值中之最大者。於實際應用中，該特定範圍之定義可以有很多種，舉例而言，若該特定範圍可涵蓋該等觸控墊中與該觸控墊相鄰之觸控墊，則該預設規則即是將具有最大電容變化值之該觸控墊以及其相鄰的兩個觸控墊排除在外，並自其他所有的觸控墊中找出電容變化值最大者後，再將其電容變化值視為該電容耦合值。實際上，該特定範圍所涵蓋之相鄰觸控墊之數目多寡並無一定之限制，可視實際操作時的需要進行調整。The first possible version of the preset rule is that the capacitive coupling value is the largest of the capacitance change values of all the touch pads outside a specific range of the touch pad. In a practical application, the specific range can be defined in various ways. For example, if the specific range can cover the touch pads adjacent to the touch pad in the touch pads, the preset rule is The touch pad having the largest capacitance change value and the two adjacent touch pads are excluded, and the capacitance change value is regarded as the largest among all the other touch pads, and then the capacitance change value is regarded as the value The capacitive coupling value. In fact, the number of adjacent touch pads covered by the specific range is not limited, and can be adjusted according to the needs of actual operation.
此外，該特定範圍亦可以涵蓋該等觸控墊中鄰近該觸控墊且具有該最大電容變化值之一特定比率以上的電容變化值之觸控墊。假設該特定比率為50%，代表該預設規則係將具有最大電容變化值之該觸控墊以及具有最大電容變化值之一半的觸控墊排除在外，並自其他所有的觸控墊中找出電容變化值最大者後，再將其電容變化值視為該電容耦合值。實際上，該特定比率並無一定之限制，可視實際操作時的需要進行調整，例如將該特定比率調整為該最大電容變化值之30%。In addition, the specific range may also cover the touch pads of the touch pads adjacent to the touch pad and having a capacitance change value above a certain ratio of the maximum capacitance change value. Assuming that the specific ratio is 50%, the preset rule excludes the touch pad having the largest capacitance change value and the touch pad having one and a half of the maximum capacitance change value, and finds out from all other touch pads. After the maximum value of the capacitance change is exceeded, the capacitance change value is regarded as the capacitance coupling value. In fact, the specific ratio is not limited, and may be adjusted according to the needs of actual operation, for example, the specific ratio is adjusted to 30% of the maximum capacitance change value.
至於該預設規則之另一種可能的型式是：該電容耦合值為位於該觸控墊之一特定範圍外的所有觸控墊之電容變化值的一平均值。舉例而言，當該方法已根據該預設規則將具有最大電容變化值之該觸控墊以及其相鄰的觸控墊排除在外後，該方法將會把其他所有觸控墊之電容變化值加以平均，並將平均後的平均值視為該電容耦合值。實際上，該平均值可以是一算數平均值或一加權平均值，並無一定之限制。Another possible type of the preset rule is that the capacitive coupling value is an average value of the capacitance change values of all the touch pads outside a specific range of the touch pad. For example, when the method has excluded the touch pad and the adjacent touch pad having the largest capacitance change value according to the preset rule, the method will change the capacitance change value of all other touch pads. The average is averaged and the averaged average is taken as the capacitive coupling value. In fact, the average value can be an arithmetic mean or a weighted average without any limitation.
然後，該方法執行步驟S14，根據該電容耦合值調整該等電容變化值以產生對應於該等觸控墊之複數個調整後觸控電容變化值。實際上，於步驟S14中，該方法係將該等電容變化值中之每一電容變化值分別減去該電容耦合值以產生該等調整後觸控電容變化值，但不以此為限。也就是說，該方法透過將每一個觸控墊的電容變化值均分別減去該電容耦合值，藉以消除電容耦合效應對於所有觸控墊之電容變化值所造成之影響。Then, the method performs step S14, and the capacitance change values are adjusted according to the capacitive coupling value to generate a plurality of adjusted touch capacitance change values corresponding to the touch pads. In fact, in step S14, the method subtracts the capacitance coupling value from each of the capacitance change values to generate the adjusted touch capacitance change values, but is not limited thereto. In other words, the method reduces the capacitance coupling value of each touch pad by subtracting the capacitance coupling value, thereby eliminating the influence of the capacitive coupling effect on the capacitance variation values of all the touch pads.
最後，由於該等調整後觸控電容變化值已產生，故該方法即可進一步執行步驟S16，根據該等調整後觸控電容變化值判定該觸控點於該電容式觸控面板之位置。由於該等調整後觸控電容變化值已排除該電容式觸控面板與鄰近機構環境之間所產生之電容耦合效應，故能夠精確地判定觸控點之位置。Finally, since the value of the touch capacitance change has been generated, the method may further perform step S16, and determine the position of the touch point on the capacitive touch panel according to the adjusted touch capacitance change value. Since the adjusted value of the touch capacitance has eliminated the capacitive coupling effect between the capacitive touch panel and the adjacent mechanism environment, the position of the touch point can be accurately determined.
值得注意的是，雖然上述實施例係以單一觸控點之感測為例進行說明，然而實際上本發明之耦合電容消除方法亦可適用於多點觸控之範疇，透過動態計算電容耦合值之方式改善先前技術中每次應用時均需額外針對機構調整或XY座標計算修正所造成之不便。It should be noted that although the above embodiment is described by taking the sensing of a single touch point as an example, the coupling capacitor elimination method of the present invention can also be applied to the multi-touch range, and the capacitive coupling value is dynamically calculated. This improves the inconvenience caused by additional adjustments to the mechanism or XY coordinates calculations for each application in the prior art.
綜上所述，根據本發明之耦合電容消除裝置及耦合電容消除方法能夠動態調整觸控所造成之耦合強度變化。即使對於機構環境之影響較為靈敏的電容式觸控面板於實際應用時需裝設在不同的機構上，因而產生不同的電容耦合效應，透過本發明提出之耦合電容消除裝置及耦合電容消除方法即可利用每回合計算觸控所產生之電容耦合值的計算結果即時且動態地調整觸控所造成之耦合強度變化，不僅實現方式相當簡易，亦可大幅改善先前技術中每次應用時均需進行機構調整及計算修正所造成之不便及困擾，藉以實現容易操作且準確度高之電容式觸控偵測。In summary, the coupling capacitor eliminating device and the coupling capacitor eliminating method according to the present invention can dynamically adjust the coupling strength variation caused by the touch. Even a capacitive touch panel that is more sensitive to the influence of the mechanism environment needs to be installed on different mechanisms in practical applications, thereby generating different capacitive coupling effects. The coupling capacitor eliminating device and the coupling capacitor eliminating method proposed by the present invention are The calculation result of the capacitive coupling value generated by the touch calculation can be used to instantly and dynamically adjust the coupling strength change caused by the touch, which is not only easy to implement, but also greatly improves the need for each application in the prior art. Inconvenience and trouble caused by mechanism adjustment and calculation correction, to achieve easy-to-operate and accurate capacitive touch detection.
藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.
S10~S16．．．流程步驟S10~S16. . . Process step
1．．．觸控感測裝置1. . . Touch sensing device
10、20．．．電容式觸控面板10, 20. . . Capacitive touch panel
12．．．感測模組12. . . Sensing module
14．．．訊號輸入模組14. . . Signal input module
Y1~Y6．．．第一觸控墊組Y1~Y6. . . First touch pad set
X1~X6．．．第二觸控墊組X1~X6. . . Second touch pad set
3．．．耦合電容消除裝置3. . . Coupling capacitor elimination device
30．．．觸控感測模組30. . . Touch sensing module
32．．．耦合電容消除模組32. . . Coupling capacitor elimination module
34．．．座標計算模組34. . . Coordinate calculation module
4．．．觸控面板4. . . Touch panel
22．．．液晶顯示模組(LCM)twenty two. . . Liquid crystal display module (LCM)
圖一A係繪示傳統的電容式觸控感測裝置。Figure 1A shows a conventional capacitive touch sensing device.
圖一B係繪示傳統的電容式觸控感測裝置之控制訊號輸入時序圖。FIG. 1B is a timing diagram of control signal input of a conventional capacitive touch sensing device.
圖二係繪示傳統的電容式觸控面板與液晶顯示模組之間產生電容耦合效應之示意圖。FIG. 2 is a schematic diagram showing a capacitive coupling effect between a conventional capacitive touch panel and a liquid crystal display module.
圖三係繪示根據本發明之一具體實施例的耦合電容消除裝置之功能方塊圖。3 is a functional block diagram of a coupling capacitor cancellation device in accordance with an embodiment of the present invention.
圖四係繪示根據本發明之一具體實施例之耦合電容消除方法的流程圖。4 is a flow chart showing a method of canceling a coupling capacitor according to an embodiment of the present invention.
3．．．耦合電容消除裝置3. . . Coupling capacitor elimination device
30．．．觸控感測模組30. . . Touch sensing module
32．．．耦合電容消除模組32. . . Coupling capacitor elimination module
34．．．座標計算模組34. . . Coordinate calculation module
4．．．觸控面板4. . . Touch panel
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