TW202004445A - Sensing method of a touch recognition device and sensing module thereof to determine that the sensing electrode with the point measurement value is abnormal when the variance value is above or below the threshold value - Google Patents
Sensing method of a touch recognition device and sensing module thereof to determine that the sensing electrode with the point measurement value is abnormal when the variance value is above or below the threshold value Download PDFInfo
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Abstract
Description
本發明關於一種觸控辨識裝置之感測方法及其感測模組，特別是關於一種判斷觸控訊號讀取時有無異物位於觸控辨識裝置上的感測方法及其感測模組，來提高整體感測精確度。 The invention relates to a sensing method and sensing module of a touch recognition device, and particularly to a sensing method and sensing module for judging whether a foreign object is on the touch recognition device when reading a touch signal, to Improve overall sensing accuracy.
觸控面板或觸控螢幕是主要的現代人機介面之一，作為一種位置辨識裝置，能夠巧妙的結合輸入和顯示介面，故具有節省裝置空間和操作人性化的優點，目前已非常廣泛應用在各式消費性或者工業性電子產品上。舉例：個人數位助理(personal digital assistant，PDA)、掌上型電腦(palm-sized PC)、平板電腦(tablet computer)、行動電話(mobile phone)、資訊家電(Information Appliance)、銷售櫃員機(Point-Of-Sale，POS)等裝置上。 The touch panel or touch screen is one of the main modern human-machine interfaces. As a position recognition device, it can skillfully combine input and display interfaces, so it has the advantages of saving device space and humanized operation. It has been widely used in All kinds of consumer or industrial electronic products. Examples: personal digital assistant (PDA), palm-sized PC, tablet computer, mobile phone, information appliance, and point-of-sale machine (Point-Of) -Sale, POS) and other devices.
現有電容式觸控面板包括資料處理模組、驅動電極及感應電極等，其中驅動電極及感應電極分別經由各自之介面與資料處理模組電性連結。驅動電極係由相互平行的複數個驅動電極條所組成，感應電極係由複數個相互平行的感應電極條所組成，其中各驅動電極條與各感應電極條 係互相垂直配置而形成複數個交叉處。當驅動電極受到驅動電壓之驅動時，其與感應電極之間形成電場，使得感應電極產生感應電荷，而具有一交互電容，複數個驅動電極條與複數個感應電極條即形成複數個電場，因此可擬似每一該交叉處即具有一交互電容，複數個交叉處即形成交互電容陣列。交互電容陣列在穩態之環境下，具有一穩定之電容量(以下稱基底電容)，使得感應電極產生一感應電壓(此時之感應電壓稱為基底電壓)，資料處理模組經由其介面讀取感應電壓。當手指或其他導電物質接近交叉處時，將改變該處之電場，造成感應電壓變化。變化之感應電壓向資料處理模組傳輸後，由類比對數位轉換器轉換成數位訊號後，再由經由演算法辨識其是否為一觸控訊號，決定是否進行觸碰位置之演算，進而處理形成向主機端輸出的觸碰資訊輸入資料。其中，主機端為具有至少一中央處理器(CPU)控制的設備，例如電腦、PDA等。 The existing capacitive touch panel includes a data processing module, a driving electrode and a sensing electrode, etc., wherein the driving electrode and the sensing electrode are electrically connected to the data processing module through their respective interfaces. The driving electrode system is composed of a plurality of parallel driving electrode bars, and the sensing electrode system is composed of a plurality of parallel sensing electrode bars, wherein each driving electrode bar and each sensing electrode bar are arranged perpendicular to each other to form a plurality of intersections . When the driving electrode is driven by the driving voltage, an electric field is formed between the driving electrode and the sensing electrode, so that the sensing electrode generates an induced charge, and has an interactive capacitance. The plurality of driving electrode bars and the plurality of sensing electrode bars form a plurality of electric fields. It can be assumed that each intersection has an interactive capacitance, and a plurality of intersections forms an interactive capacitance array. In a steady-state environment, the interactive capacitor array has a stable capacitance (hereinafter referred to as the substrate capacitance), so that the sensing electrode generates an induced voltage (the induced voltage at this time is called the substrate voltage), and the data processing module reads through its interface Take the induced voltage. When a finger or other conductive substance approaches the intersection, it will change the electric field there, causing a change in induced voltage. After the changed induced voltage is transmitted to the data processing module, it is converted into a digital signal by an analog-to-digital converter, and then it is recognized whether it is a touch signal by an algorithm, and then whether to perform the calculation of the touch position is determined and processed. Input information of touch information output to the host. The host end is a device controlled by at least one central processing unit (CPU), such as a computer, a PDA, and so on.
由於驅動電極與感應電極之間所形成的電場容易受到外來電磁波等的干擾，導致不能準確地量測手指等導電性物質所引起的電容性充電轉移之電荷量的變化。因此現有技術有利用訊號相減的方式將此一雜訊減除的方法，其重複進行一量測循環，得到二個以上不同的感測電壓訊號再相減之。藉由差分法(deferential)處理二個以上不同的感測電壓訊號，以得到消除基底雜訊(common mode noise)的觸控訊號。採用一般差分法雖然可以消除基底雜訊，但是需要兩兩成對的感測訊號來計算出差分值，可能在量測過程中有異物觸碰而造成精確度或解析度下降。 Since the electric field formed between the driving electrode and the sensing electrode is easily interfered by external electromagnetic waves, etc., it is impossible to accurately measure the change in the amount of charge caused by the capacitive charge transfer caused by conductive materials such as fingers. Therefore, in the prior art, there is a method of subtracting this noise by means of signal subtraction, which repeats a measurement cycle to obtain two or more different sensing voltage signals and then subtracts them. A differential method (deferential) is used to process two or more different sensing voltage signals to obtain a touch signal that eliminates common mode noise. Although the general differential method can eliminate the base noise, it needs two or two pairs of sensing signals to calculate the differential value, which may be caused by foreign objects touching during the measurement process, resulting in a decrease in accuracy or resolution.
鑑於上述發明背景，本發明實施例提供一種觸控辨識裝置之感測方法及其感測模組，通過週期性或即時性穿插執行一判斷程序於執行感測方法的一般週期波差異比較運算中，可以判斷觸控訊號讀取時有無異物位於觸控辨識裝置上以及消除雜訊訊號的感測方法及其感測模組，來提高整體感測精確度。 In view of the above background of the invention, an embodiment of the present invention provides a sensing method and sensing module of a touch recognition device, which executes a judgment procedure through periodic or real-time interleaving in a general periodic wave difference comparison operation for performing the sensing method It can determine whether there are foreign objects on the touch recognition device when reading the touch signal and the sensing method and sensing module for eliminating the noise signal to improve the overall sensing accuracy.
為了達到上述之一或部份或全部目的或是其他目的，本發明實施例提供一種觸控辨識裝置之感測方法，其中觸控辨識裝置包括複數個感測電極及複數個驅動電極，其中複數個感測電極與複數個驅動電極交會而具有複數個節點，感測方法包括以下步驟：選定複數個感測電極中的一第一感測電極，並將第一感測電極設為反向量測，其中第一感測電極與複數個驅動電極交會而具有複數個第一節點；驅動一個或一個以上驅動電極，並量測第一感測電極以得到一個或一個以上第一節點的一第一量測值，再量測第一感測電極以外的其他感測電極，以得到複數個節點的複數個點量測值；比較同一個驅動電極上的每一點量測值分別與第一量測值的一變異值；檢查變異值是否高於或低於一閾限值；若變異值高於或低於閾限值，則判斷點量測值上所在的感測電極為異常；以及，當至少一個變異值高於或低於閾限值時，停止一觸控量測。 In order to achieve one or some or all of the above or other objectives, embodiments of the present invention provide a sensing method for a touch recognition device, wherein the touch recognition device includes a plurality of sensing electrodes and a plurality of driving electrodes, of which a plurality Each sensing electrode intersects with a plurality of driving electrodes to have a plurality of nodes. The sensing method includes the following steps: selecting a first sensing electrode among the plurality of sensing electrodes, and setting the first sensing electrode as an inverse vector Measurement, where the first sensing electrode intersects with the plurality of driving electrodes to have a plurality of first nodes; driving one or more driving electrodes, and measuring the first sensing electrode to obtain a first node of one or more first nodes A measured value, and then measure other sensing electrodes other than the first sensing electrode to obtain the measured values of the plural points of the plurality of nodes; compare the measured values of each point on the same drive electrode with the first measured value A variation value of the measured value; check whether the variation value is higher or lower than a threshold limit; if the variation value is higher or lower than the threshold limit, it is judged that the sensing electrode on the point measurement value is abnormal; and, When at least one variation value is higher or lower than the threshold, a touch measurement is stopped.
在一實施例中，感測電極被判斷為異常的數量為至少兩個，則停止觸控量測。 In one embodiment, the number of sensing electrodes determined to be abnormal is at least two, and then the touch measurement is stopped.
在一實施例中，若變異值未高於或低於閾限值，或是感測電極為異常的數量未達兩個時，則進行觸控量測。 In one embodiment, if the variation value is not higher or lower than the threshold value, or the number of sensing electrodes that are abnormal is less than two, touch measurement is performed.
在一實施例中，得到第一量測值及複數個點量測值之步驟更包括：驅動複數個驅動電極的其一者或一部份者；量測第一感測電極以得到一個或一個以上第一節點的第一量測值，再同時或依序量測第一感測電極以外的其他感測電極，以得到複數個點量測值的一者或一部份者；停止驅動；驅動複數個驅動電極的另一者或其餘部分者；量測第一感測電極以得到一個或一個以上第一節點的第一量測值，再同時或依序量測第一感測電極以外的其他感測電極，以得到複數個點量測值的另一者或其餘部分者；以及，重複上述驅動動作，以得到全部的複數個點量測值及複數個第一量測值。 In an embodiment, the step of obtaining the first measurement value and the plurality of point measurement values further includes: driving one or a part of the plurality of driving electrodes; measuring the first sensing electrode to obtain one or The first measurement value of more than one first node, and then simultaneously or sequentially measure other sensing electrodes other than the first sensing electrode to obtain one or a part of the measured values of a plurality of points; stop driving Drive the other or the rest of the plurality of drive electrodes; measure the first sensing electrode to obtain the first measurement value of one or more first nodes, and then measure the first sensing electrode simultaneously or sequentially The other sensing electrodes are used to obtain the other one or the rest of the plurality of point measurement values; and, repeating the above-mentioned driving action to obtain all the plurality of point measurement values and the plurality of first measurement values.
在一實施例中，得到第一量測值及複數個點量測值之步驟更包括：同時驅動複數個驅動電極的全部者；以及，量測第一感測電極以得到全部的第一節點的第一量測值，再同時量測第一感測電極以外的其他感測電極，以得到全部的複數個點量測值。 In one embodiment, the step of obtaining the first measured value and the measured values of the plurality of points further includes: driving all of the plurality of driving electrodes at the same time; and, measuring the first sensing electrode to obtain all the first nodes The first measurement value of the sensor, and simultaneously measure other sensing electrodes other than the first sensing electrode to obtain all of the plurality of point measurement values.
在一實施例中，更包括：選定複數個感測電極中的另一者作為第一感測電極，以將第一感測電極設為反向量測。 In an embodiment, the method further includes: selecting another one of the plurality of sensing electrodes as the first sensing electrode, so as to set the first sensing electrode as an inverse vector measurement.
在一實施例中，將第一感測電極設為反向量測的步驟包括將第一感測電極電性連接至一反向量測電路，或是一處理單元在此量測循環將經由第一感測電極所收到的訊號進行反向處理。觸控量測更包括：電性連接複數個感測電極之其餘者至一正向量測電路，並進行觸控量測而得到一觸控訊號。其中觸控量測之步驟包括：反向量測電路依序會同正向量測電路進行量測，分別同步得到一反向訊號及一正向訊號；以及，通過一類比數位轉換電路接收反向訊號及正向訊號，來轉換得到一觸控訊號，其中正向 訊號與反向訊號的相位訊號是180度偏移。 In one embodiment, the step of setting the first sensing electrode to inverse vector measurement includes electrically connecting the first sensing electrode to an inverse vector measurement circuit, or a processing unit in this measurement cycle will pass The signal received by the first sensing electrode is processed in reverse. The touch measurement further includes: electrically connecting the rest of the plurality of sensing electrodes to a positive vector measurement circuit, and performing touch measurement to obtain a touch signal. The steps of touch measurement include: the inverse vector measurement circuit sequentially measures with the positive vector measurement circuit to obtain a reverse signal and a forward signal synchronously; and, the reverse signal is received through an analog digital conversion circuit The signal and the forward signal are converted to obtain a touch signal, wherein the phase signal of the forward signal and the reverse signal is 180 degrees offset.
在一實施例中，若變異值高於閾限值，則判斷有一指向物件觸碰第一感測電極。 In one embodiment, if the variation value is higher than the threshold value, it is determined that a pointing object touches the first sensing electrode.
在一實施例中，若變異值低於閾限值，則判斷一非指向物件觸碰第一感測電極。 In one embodiment, if the variation value is lower than the threshold value, it is determined that a non-pointing object touches the first sensing electrode.
為了達到上述之一或部份或全部目的或是其他目的，本發明實施例提供一種觸控辨識裝置之感測模組，包括：複數個感測電極，包括一設為反向量測的第一感測電極；複數個驅動電極，與複數個感測電極交會而具有複數個節點，與第一感測電極交會而具有複數個第一節點；以及，一處理單元電性連接複數個驅動電極及複數個感測電極，用以驅動一個或一個以上驅動電極，量測第一感測電極以得到一個或一個以上第一節點的一第一量測值，再量測第一感測電極以外的其他感測電極，以得到複數個節點的複數個點量測值；其中處理單元比較同一個驅動電極上的每一點量測值分別與每一第一量測值的一變異值；處理單元檢查變異值是否高於或低於一閾限值；若變異值高於或低於閾限值，則處理單元判斷點量測值上的感測電極為異常；以及當至少一個變異質高於或低於閾限值，處理單元停止一觸控量測。其中若變異值未高於或低於閾限值，或是感測電極為異常的數量未達兩個時，則處理單元進行觸控量測。 In order to achieve one, part, or all of the foregoing or other objectives, an embodiment of the present invention provides a sensing module of a touch recognition device, including: a plurality of sensing electrodes, including a first A sensing electrode; a plurality of driving electrodes intersecting the plurality of sensing electrodes to have a plurality of nodes, and a first sensing electrode intersecting to have the plurality of first nodes; and, a processing unit is electrically connected to the plurality of driving electrodes And a plurality of sensing electrodes for driving one or more driving electrodes, measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and then measuring other than the first sensing electrode Other sensing electrodes to obtain the measured values of multiple points of multiple nodes; wherein the processing unit compares the measured value of each point on the same drive electrode with a variation value of each first measured value; the processing unit Check whether the variation value is higher or lower than a threshold limit; if the variation value is higher or lower than the threshold limit, the processing unit judges that the sensing electrode on the point measurement value is abnormal; and when at least one variation quality is higher than Or below the threshold limit, the processing unit stops a touch measurement. If the variation value is not higher or lower than the threshold limit, or if the number of abnormal sensing electrodes is less than two, the processing unit performs touch measurement.
100、200‧‧‧感測模組 100、200‧‧‧sensing module
110、210‧‧‧處理單元 110, 210‧‧‧ processing unit
120(D1-D7)、220(225A-225D)‧‧‧驅動電極 120(D1-D7), 220(225A-225D) ‧‧‧ drive electrode
130(S1-S4)、230(S1-S7)‧‧‧感測電極 130(S1-S4), 230(S1-S7)‧‧‧sensing electrode
圖1為本發明第一實施例中一種應用於觸控辨識裝置之感測模組的示意圖。 FIG. 1 is a schematic diagram of a sensing module applied to a touch recognition device in a first embodiment of the invention.
圖2為本發明實施例中一種應用於觸控辨識裝置之感測方法的流程圖。 2 is a flowchart of a sensing method applied to a touch recognition device according to an embodiment of the invention.
圖3為本發明第一實施例中一種應用於觸控辨識裝置之感測模組的示意圖。 FIG. 3 is a schematic diagram of a sensing module applied to a touch recognition device in the first embodiment of the present invention.
圖4為本發明第二實施例中一種應用於觸控辨識裝置之感測模組的示意圖。 4 is a schematic diagram of a sensing module applied to a touch recognition device in a second embodiment of the invention.
有關本發明前述及其他技術內容、特點與功效，在以下配合參考圖式之一較佳實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是用於參照隨附圖式的方向。因此，該等方向用語僅是用於說明並非是用於限制本發明。 The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description with reference to one of the preferred embodiments of the drawings. Directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only used to refer to the directions of the accompanying drawings. Therefore, these directional terms are only used for illustration and not for limiting the present invention.
請參照圖1，是本發明第一實施例中的一種觸控辨識裝置之感測模組100。一種觸控辨識裝置之感測模組100包括一處理單元110、複數個驅動電極120及複數個感測電極130。於本實施例中，驅動電極120包括至少7條驅動電極D1-D7，感測電極130包括至少4條感測電極S1-S4。複數個驅動電極120與複數個感測電極130交會而具有複數個節點D1S1、D1S2、D1S3、D1S4、D2S1、D2S2...等。處理單元110電性連接感測電極130及驅動電極120，用以驅動驅動電極120並感測感測電極130上的電容變化，以得到複數個節點的複數個點量測值。 Please refer to FIG. 1, which is a
上述感測模組100用以執行以下本發明實施例中的一種觸控辨識裝置之感測方法。 The above-mentioned
請參照圖2，是本發明實施例中一種觸控辨識裝置之感測方法的流程示意圖，並配合圖3及圖4說明。本發明實施例的感測方法包括以下步驟S100-S700來執行判斷程序並配合執行觸控量測。 Please refer to FIG. 2, which is a schematic flowchart of a sensing method of a touch recognition device according to an embodiment of the present invention, and is described in conjunction with FIGS. 3 and 4. The sensing method according to the embodiment of the present invention includes the following steps S100-S700 to execute the judgment procedure and cooperate with the touch measurement.
步驟S100：選定複數個感測電極S1-S4中的一第一感測電極。於本實施例中預先選定感測電極S1為第一感測電極，並設定感測電極S1作為反向量測來使用。第一感測電極S1與複數個驅動電極D1-D7交會而具有複數個第一節點D1S1、D2S1、D3S1...等。其中設定感測電極S1作為反向量測的步驟包括將感測電極S1電性連接至一反向量測電路，使得處理單元110在此一量測循環中，可將經由第一感測電極S1所收到的訊號進行反向處理，例如乘上一負號，以節省運算時間。 Step S100: Select a first sensing electrode among the plurality of sensing electrodes S1-S4. In this embodiment, the sensing electrode S1 is pre-selected as the first sensing electrode, and the sensing electrode S1 is set to be used as inverse vector measurement. The first sensing electrode S1 intersects with the plurality of driving electrodes D1-D7 to have a plurality of first nodes D1S1, D2S1, D3S1... and so on. The step of setting the sensing electrode S1 as an inverse vector measurement includes electrically connecting the sensing electrode S1 to an inverse vector measurement circuit, so that the
步驟S200：驅動一個或一個以上的驅動電極，量測第一感測電極以得到一個或一個以上第一節點的量測值，再量測第一感測電極以外的其他感測電極，以得到其他複數個節點的複數個點量測值。在本實施例中，上述複數個節點的點量測值或第一個節點量測值為週期波驅動所產生的變異值。 Step S200: driving one or more driving electrodes, measuring the first sensing electrode to obtain a measurement value of one or more first nodes, and then measuring other sensing electrodes other than the first sensing electrode to obtain The measured values of the plural points of other plural nodes. In this embodiment, the point measurement value of the plurality of nodes or the first node measurement value is a variation value generated by periodic wave driving.
在一實施例中，得到第一量測值及複數個點量測值之步驟更包括：驅動驅動電極的其一者或一部份者；量測第一感測電極以得到一個或一個以上第一節點的第一量測值，再同時或依序量測第一感測電極以外的其他感測電極，以得到複數個點量測值的一者或一部份者；停止驅動；驅動複數個驅動電極的另一者或其餘部分者；量測第一感測電極以得到一個或一個以上第一節點的第一量測值，再同時或依序量測第一感測電極以外的其他感測電極，以得到複數個點量測值的另一者或其餘部分者；以及， 重複上述驅動動作，以得到全部的點量測值及第一量測值。 In one embodiment, the step of obtaining the first measured value and the measured values of the plurality of points further includes: driving one or a part of the driving electrode; measuring the first sensing electrode to obtain one or more than one The first measurement value of the first node, and then simultaneously or sequentially measure other sensing electrodes other than the first sensing electrode to obtain one or a part of the measured values of a plurality of points; stop driving; drive The other or the rest of the plurality of driving electrodes; measuring the first sensing electrode to obtain the first measurement value of one or more first nodes, and simultaneously or sequentially measuring other than the first sensing electrode Other sensing electrodes to obtain the other one or the rest of the plurality of point measurement values; and, repeating the above-mentioned driving action to obtain all the point measurement values and the first measurement value.
在第一實施例中，如圖3所示，先驅動驅動電極D1，依序得到不同節點D1S1、D1S2、D1S3、D1S4的點量測值，其中包含第一節點D1S1的一第一量測值。接著，跟著箭頭方向依序驅動驅動電極D2，而得到不同節點D2S1、D2S2、D2S3、D2S4的點量測值，其中包含第一節點D2S1的第一量測值。然後，依序驅動驅動電極D3及D4，而得到所有節點D3S1、D3S2、D3S3、D3S4、D4S1、D4S2、D4S3、D4S4的點量測值。 In the first embodiment, as shown in FIG. 3, the driving electrode D1 is driven first, and the point measurement values of different nodes D1S1, D1S2, D1S3, D1S4 are obtained in sequence, including a first measurement value of the first node D1S1 . Next, the driving electrodes D2 are sequentially driven in the direction of the arrow to obtain point measurement values of different nodes D2S1, D2S2, D2S3, and D2S4, including the first measurement value of the first node D2S1. Then, the driving electrodes D3 and D4 are sequentially driven to obtain point measurement values of all nodes D3S1, D3S2, D3S3, D3S4, D4S1, D4S2, D4S3, and D4S4.
圖4是本發明第二實施例中的一種觸控辨識裝置之感測模組200。感測模組200包括一處理單元210、複數個驅動電極220及複數個感測電極230。處理單元210電性連接感測電極230及驅動電極220。於本實施例中，驅動電極220被區分成四個部分，分別為第一部份驅動電極225A-225D，感測電極230包括至少7條感測電極S1-S7。複數個驅動電極220與複數個感測電極230交會而具有複數個節點，且仍是選定感測電極S1為第一感測電極。於第二實施例中，先驅動第一部份驅動電極225A，依序得到不同節點225AS1、225AS2、225AS3...等的點量測值，其中包含第一節點D1S1的一第一量測值。接著，跟著箭頭方向依序驅動第二部分驅動電極225B，再驅動第三部分驅動電極225C及第四部份驅動電極225D，而得到所有節點的點量測值。 FIG. 4 is a
在本步驟S200的上述實施例中，本發明並不限定於此步驟中得到全部的點量測值及第一量測值，可先執行驅動驅動電極的其一者或一部份者，並得到第一感測電極的第一量測值及感測電極的其一者或一部份的複數個節點的點量測值，即可接續下個步驟S300-S400，再回到步驟 S200以得到全部點量測值及第一量測值。 In the above embodiment of step S200, the present invention is not limited to obtaining all the point measurement values and the first measurement value in this step, and one or a part of the driving electrodes can be driven first, and Obtaining the first measurement value of the first sensing electrode and the point measurement value of a plurality of nodes of one or a part of the sensing electrode, the next steps S300-S400 can be continued, and then return to step S200 to Get all the measured values and the first measured value.
在一實施例中，再一次參酌圖3，第一次先驅動驅動電極D1，依序得到不同節點D1S1、D1S2、D1S3、D1S4的點量測值，其中包含第一節點D1S1的一第一量測值。接著，跟著黑色大箭頭方向，第二次直接跳選驅動驅動電極D4，而得到不同節點D4S1、D4S2、D4S3、D4S4的點量測值，其中包含第一節點D4S1的第一量測值。然後，繼續跳選驅動其他驅動電極。其中，第二次驅動可直接跳選驅動電極D4，也就是距離第一次驅動驅動電極D1處，相差隔了3條驅動電極；本發明並不限定此實施例，抑或是可跳選相差隔了4-5條的驅動電極D5或D6，來加快感測方法的反應時間。 In one embodiment, referring to FIG. 3 again, the driving electrode D1 is driven for the first time, and the point measurement values of different nodes D1S1, D1S2, D1S3, and D1S4 are sequentially obtained, including a first quantity of the first node D1S1 Measured value. Then, following the direction of the large black arrow, the drive electrode D4 is directly jump-selected for the second time, and the point measurement values of different nodes D4S1, D4S2, D4S3, D4S4 are obtained, including the first measurement value of the first node D4S1. Then, continue to jump drive other drive electrodes. Among them, the driving electrode D4 can be directly skipped during the second driving, that is, the driving electrode D1 is separated from the first driving by three driving electrodes; the present invention is not limited to this embodiment, or it can be skipped 4-5 drive electrodes D5 or D6 are added to speed up the response time of the sensing method.
在另一實施例中，得到第一量測值及複數個點量測值之步驟更包括：同時驅動複數個驅動電極的全部者；以及，量測第一感測電極以得到全部的第一節點的第一量測值，再同時量測第一感測電極以外的其他感測電極，以得到全部的複數個點量測值。 In another embodiment, the step of obtaining the first measurement value and the plurality of point measurement values further includes: driving all of the plurality of driving electrodes at the same time; and, measuring the first sensing electrodes to obtain all the first The first measurement value of the node, and simultaneously measuring other sensing electrodes other than the first sensing electrode, to obtain all the plural point measurement values.
步驟S300：比較同一個驅動電極上的每一點量測值分別與第一量測值的一變異值。如圖2所示的第一實施例中，於步驟S200中，驅動驅動電極D1後，依序求出第一節點D1S1的第一量測值分別與其他節點D1S2、D1S3、D1S4的變異值，然後進行步驟S400；或是再驅動驅動電極D2後，依序求出第一節點D2S1的第一量測值分別與其他節點D2S2、D2S3、D2S4的變異值，再進行步驟S400。 Step S300: Compare each point measurement value on the same driving electrode with a variation value of the first measurement value. In the first embodiment shown in FIG. 2, in step S200, after driving the driving electrode D1, the variation values of the first measurement value of the first node D1S1 and the other nodes D1S2, D1S3, D1S4, respectively, are sequentially obtained, Then step S400 is performed; or after driving electrode D2 is driven again, the variation values of the first measurement value of the first node D2S1 and the other nodes D2S2, D2S3, and D2S4 are sequentially obtained, and then step S400 is performed.
步驟S400：檢查步驟S300所得到的變異值是否高於或低於感設模組所設定的一閾限值。上述感測電極所感應的量測值是週期波驅動所產生之變異，利用步驟S300-S400再比較二者的差異。當無指向物件如手 指或觸控筆等觸碰感測模組時，若感測模組要判別是否有其他異物觸碰，則是進行週期波驅動變異衰減比較，因其感應量測值會被觸碰或其他異物等非指向物件(例如水漬)造成衰減，因此上述步驟是為了觀察判斷此衰減是否由非指向物件所引起。若變異值高於閾限值，則判斷有指向物件觸碰第一感測電極。若變異值低於閾限值，則判斷一非指向物件觸碰第一感測電極。 Step S400: Check whether the variation value obtained in step S300 is higher or lower than a threshold value set by the sensing module. The measurement value sensed by the sensing electrode is a variation caused by periodic wave driving, and then the steps S300-S400 are used to compare the difference between the two. When a non-pointing object, such as a finger or a stylus, touches the sensing module, if the sensing module wants to determine whether other foreign objects are touching, it is to compare the attenuation attenuation of the periodic wave drive variation. Non-pointing objects (such as water stains) caused by contact or other foreign objects cause attenuation, so the above steps are to observe and determine whether the attenuation is caused by non-pointing objects. If the variation value is higher than the threshold value, it is determined that a pointing object touches the first sensing electrode. If the variation value is lower than the threshold value, it is determined that a non-pointing object touches the first sensing electrode.
步驟S500：若變異值高於或低於閾限值，則判斷該點量測值上所在的感測電極為異常。如圖3所示，由於節點D1S2及D4S3分別與第一節點D1S1及D4S1的變異值高於或低於閾限值，因此判斷感測電極S2及S3皆為異常。至於圖4所示，由於節點區225AS2及225CS4分別與第一節點225AS1及225CS1的變異值高於或低於閾限值，因此判斷感測電極S2及S4皆為異常。 Step S500: If the variation value is higher or lower than the threshold value, it is determined that the sensing electrode on the measured value at that point is abnormal. As shown in FIG. 3, since the variation values of the nodes D1S2 and D4S3 and the first nodes D1S1 and D4S1 are higher or lower than the threshold value, respectively, it is determined that the sensing electrodes S2 and S3 are abnormal. As shown in FIG. 4, since the variation values of the node areas 225AS2 and 225CS4 and the first nodes 225AS1 and 225CS1 are higher or lower than the threshold value, respectively, it is determined that the sensing electrodes S2 and S4 are abnormal.
步驟S600：承續步驟S500，同時當至少一個變異值高於或低於閾限值時，停止一觸控量測。在一較佳實施例中，感測電極被判斷為異常的數量為至少兩個，則停止觸控量測。 Step S600: Continuing with step S500, and at least one touch measurement is stopped when at least one variation value is higher or lower than the threshold value. In a preferred embodiment, the number of sensing electrodes determined to be abnormal is at least two, and then the touch measurement is stopped.
當判斷第一感測電極遭到手指觸碰或是有異物於其上時，先前所獲得節點的量測值訊號，則以新讀的點量測值，覆蓋舊讀的點量測值；或是可直接將舊的點量測值丟棄不使用。 When it is judged that the first sensing electrode is touched by a finger or there is a foreign object on it, the measurement value signal of the previously obtained node will overwrite the old reading point measurement value with the newly reading point measurement value; Or the old point measurement value can be directly discarded and not used.
步驟S700：承續步驟S600，選定複數個感測電極中的另一者作為第一感測電極並設為反向量測。重複上述步驟S100-S600，以重新執行判斷程序。 Step S700: Continuing with step S600, another one of the plurality of sensing electrodes is selected as the first sensing electrode and set as the inverse vector measurement. Repeat the above steps S100-S600 to execute the judgment procedure again.
上述感測方法的判斷程序可以採用週期性檢測或即時性檢 測。若採用週期性檢測，則執行數次觸控量測後，執行一次此判斷程序，來掃描全面板，以確認被選定作為反向量測的感測電極是否適當；若採用即時性檢測，則觸控量測下的每次週期波變異衰減比較後即進行判斷。每次取得節點訊號進行週期波變異衰減比較時，先將變異值依觸控系統所設條件判斷作為反向量測的第一感測電極是否遭觸碰，再進行其他訊號處理或判斷，例如報點。 The judgment procedure of the above-mentioned sensing method may adopt periodic detection or immediate detection. If periodic detection is used, after several touch measurements are performed, this judgment procedure is performed once to scan the full board to confirm whether the sensing electrode selected as the inverse vector measurement is appropriate; if real-time detection is used, The comparison is made after the attenuation of each periodic wave under the touch measurement is compared. Every time the node signal is obtained for periodic wave variation attenuation comparison, the variation value is first determined according to the conditions set by the touch system to determine whether the first sensing electrode as an inverse vector is touched, and then other signal processing or judgment is performed, for example Reporting.
步驟S510：接續步驟S400，若變異值未高於或低於閾限值，或是感測電極為異常的數量未達兩個時，則進行觸控量測。在本實施例中，除了將感測電極S1電性連接至一反向量測電路，觸控量測更包括：電性連接複數個感測電極之其餘者至一正向量測電路，並進行觸控量測而得到一觸控訊號。進行觸控量測之步驟包括：反向量測電路依序會同正向量測電路進行量測，分別同步得到一反向訊號及一正向訊號；以及，通過一類比數位轉換電路接收反向訊號及正向訊號，來轉換得到一觸控訊號，其中，正向訊號與反向訊號的相位訊號是180度偏移。 Step S510: Following step S400, if the variation value is not higher or lower than the threshold value, or the number of abnormal sensing electrodes is less than two, touch measurement is performed. In this embodiment, in addition to electrically connecting the sensing electrode S1 to an inverse vector measuring circuit, touch measurement further includes: electrically connecting the rest of the plurality of sensing electrodes to a positive vector measuring circuit, and Perform touch measurement to obtain a touch signal. The steps of performing touch measurement include: the inverse vector measurement circuit sequentially performs measurement with the positive vector measurement circuit, respectively obtaining a reverse signal and a forward signal synchronously; and, receiving the reverse through an analog digital conversion circuit The signal and the forward signal are converted to obtain a touch signal, in which the phase signal of the forward signal and the reverse signal are offset by 180 degrees.
本發明實施例提供一種觸控辨識裝置之感測方法及其感測模組，通過週期性或即時性穿插執行一判斷程序於執行感測方法的週期波變異衰減比較運算中，可以判斷觸控訊號讀取時有無異物位於觸控辨識裝置上的感測方法及其感測模組，來提高整體感測精確度。 Embodiments of the present invention provide a sensing method and sensing module for a touch recognition device, which can determine a touch by periodically or instantaneously interleaving and executing a judgment procedure in a periodic wave variation attenuation comparison operation of the sensing method A sensing method and a sensing module for detecting whether foreign objects are on the touch recognition device during signal reading to improve the overall sensing accuracy.
S100-S700‧‧‧步驟 S100-S700‧‧‧Step
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