TWI774778B - Sensing module applied to touch recognition device and method thereof - Google Patents
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Abstract
一種應用於觸控辨識裝置之感測模組，其中觸控辨識裝置上具有複數個驅動電極及複數個感應電極，包括：至少一第一相位電路，電性連接驅動電極及感應電極；複數個第二相位電路，電性連接驅動電極及感應電極，其中每一第二相位電路依序會同第一相位電路進行量測，分別同步得到一第一訊號及一第二訊號；以及，至少一類比數位轉換電路，電性連接第一相位電路及複數個第二相位電路，用以接收第一訊號及第二訊號，來轉換得到一量測訊號，其中第一相位電路所得到之第一訊號與複數個第二相位電路所得到之第二訊號的相位訊號是180度偏移。 A sensing module applied to a touch recognition device, wherein the touch recognition device has a plurality of driving electrodes and a plurality of sensing electrodes, comprising: at least a first phase circuit electrically connected to the driving electrodes and the sensing electrodes; a plurality of The second phase circuit is electrically connected to the driving electrode and the sensing electrode, wherein each second phase circuit is sequentially measured with the first phase circuit to obtain a first signal and a second signal synchronously respectively; and, at least one analog The digital conversion circuit is electrically connected to the first phase circuit and a plurality of second phase circuits, and is used for receiving the first signal and the second signal to convert to obtain a measurement signal, wherein the first signal obtained by the first phase circuit and the The phase signals of the second signals obtained by the plurality of second phase circuits are shifted by 180 degrees.
Description
本發明關於一種應用於觸控辨識裝置之感測模組，特別是關於一種藉由電路設計來達到濾除雜訊且同步訊號處理的感測模組。 The present invention relates to a sensing module applied to a touch recognition device, and more particularly, to a sensing module that can filter out noise and synchronize signal processing through circuit design.
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 the input and display interface, 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, 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, driving electrodes and sensing electrodes, etc., wherein the driving electrodes and the sensing electrodes are electrically connected to the data processing module through their respective interfaces. The driving electrodes are composed of a plurality of parallel driving electrode strips, and the sensing electrodes are composed of a plurality of mutually parallel sensing electrode strips, wherein each driving electrode strip and each sensing electrode strip 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 it and the sensing electrode, so that the sensing electrode generates an induced charge and has an interactive capacitance, and a plurality of driving electrode strips and a plurality of sensing electrode strips form a plurality of electric fields, because It can be simulated that each intersection has an interactive capacitor, and a plurality of intersections form an array of interactive capacitors. In a stable environment, the interactive capacitor array has a stable capacitance (hereinafter referred to as base capacitance), so that the sensing electrode generates an induced voltage (the induced voltage at this time is called the base voltage), and the data processing module reads through its interface. Take the induced voltage. When a finger or other conductive material approaches the intersection, it will change the electric field there, causing the induced voltage to change. 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 the algorithm is used to identify whether it is a touch signal, determine whether to perform the calculation of the touch position, and then process and form Input data to the touch information output from the host. The host end is a device controlled by at least one central processing unit (CPU), such as a computer, a PDA, and the like.
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，以得到一觸控訊號。該量測循環首先將驅動電極與感應電極接地，清除殘存電荷後，利用類比對數為轉換器進行第一次量測，得到一感測訊號A；然後將感應電極浮接，等待驅動訊號對驅動電極充電；接著，以一固定電壓對驅動電極充電，此時感應電極產生感應電壓；接著，利用類比對數為轉換器進行第二次量測，得到一感測訊號B；然後同時將驅動電極與感應電極接地，清除殘存電荷，等待下一個量測循環；最後，藉由差分法(deferential)處理感測訊號A及B，以得到消除基底雜訊(common mode noise)的觸控訊號。 Since the electric field formed between the driving electrode and the sensing electrode is easily disturbed by external electromagnetic waves, etc., it is impossible to accurately measure the change in the amount of charge transferred by capacitive charging caused by conductive substances 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 subtract them to obtain a touch signal. In this measurement cycle, the driving electrode and the sensing electrode are grounded first, and after removing the residual charge, the analog logarithm is used to perform the first measurement for the converter, and a sensing signal A is obtained; The electrode is charged; then, the driving electrode is charged with a fixed voltage, and the induction electrode generates an induced voltage; then, the analog logarithm is used for the second measurement of the converter to obtain a sensing signal B; then the driving electrode and the The sensing electrode is grounded, the residual charge is removed, and the next measurement cycle is waited; finally, the sensing signals A and B are processed by the differential method to obtain the touch signal with the common mode noise eliminated.
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，可能造成精確度或解析度下降，且拖慢反應時間。由於每次量測時點若不同步，雜訊出現的時點可能不同，而更必須留意在差分處理訊號時，需要採用同步發出的訊號點，避免不同量測時點所出現雜訊狀態不同，因此需要花費較多時間在接收前，先進行同步處理。因此，如何解決現有電容觸控面板中各種技術造成靈敏度下降，造成使用者感到觸控面板防水性能差，以及如何提升觸控面中抗干擾性能差的問題。 Although the general difference method can eliminate the base noise, it needs to be paired in pairs. The difference value is calculated from the sensing signal, which may cause a decrease in accuracy or resolution, and slow down the response time. Since each measurement time point is not synchronized, the time point of noise may be different, and it is necessary to pay attention to the need to use the signal point sent synchronously when differentially processing the signal, so as to avoid the different state of noise at different measurement time points. Therefore, it is necessary to It takes more time to synchronize before receiving. Therefore, how to solve the problems of the sensitivity reduction caused by various technologies in the existing capacitive touch panel, causing the user to feel that the touch panel has poor waterproof performance, and how to improve the poor anti-interference performance of the touch panel.
鑑於上述發明背景，本發明實施例提供一種應用於觸控辨識裝置的改良感測方法及其模組。本發明利用至少一個反向量測電路，對應複數個正向量測電路；也就是說，指定一組量測電路作為反向(negative)感測，其餘的量測電路作為正向(positive)感測，並與上述指定的反向量測電路所得到的兩兩同步訊號逐一進行差分，在差分處理訊號中由於每兩訊號皆為同步發出，因此減少同步處理的時間，並且提高整體精確度。 In view of the foregoing background of the invention, embodiments of the present invention provide an improved sensing method and a module thereof applied to a touch recognition device. The present invention utilizes at least one reverse measurement circuit, corresponding to a plurality of forward measurement circuits; that is, a set of measurement circuits is designated as negative (negative) sensing, and the rest of the measurement circuits are used as forward (positive) It is sensed and differentiated one by one with the two synchronization signals obtained by the reverse measurement circuit specified above. In the differential processing signal, since every two signals are sent out synchronously, the synchronization processing time is reduced and the overall accuracy is improved. .
10:第一相位電路(反向量測電路) 10: The first phase circuit (reverse measurement circuit)
20:第二相位電路(正向量測電路) 20: The second phase circuit (forward measurement circuit)
21、22:反向量測電路 21, 22: Reverse measurement circuit
30:類比數位轉換電路 30: Analog-to-digital conversion circuit
40、40a及40b:多工器 40, 40a and 40b: Multiplexers
N:反向量測電路 N: reverse measurement circuit
P:正向量測電路 P: Positive vector measurement circuit
第一圖，係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。 The first figure is a schematic diagram of a sensing module applied to a touch recognition device according to the first embodiment of the present invention.
第二圖，係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。 The second figure is a schematic diagram of a sensing module applied to a touch recognition device according to the second embodiment of the present invention.
第三圖，係為本發明第一實施例及第二實施例中一種應用於觸控辨識裝置之感測方法的流程圖。 FIG. 3 is a flowchart of a sensing method applied to a touch recognition device according to the first embodiment and the second embodiment of the present invention.
第四圖，係為本發明第三實施例及第四實施例中一種應用於觸控辨識裝置之感測方法的流程圖。 FIG. 4 is a flowchart of a sensing method applied to a touch recognition device in the third and fourth embodiments of the present invention.
第五圖，係為本發明第三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. 5 is a schematic diagram of a sensing module applied to a touch recognition device according to the third embodiment of the present invention.
第六圖，係為本發明第四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. 6 is a schematic diagram of a sensing module applied to a touch recognition device according to the fourth embodiment of the present 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 of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only used to refer to the directions of the accompanying drawings. Therefore, these directional terms are only used to illustrate and not to limit the present invention.
請參考第一圖，係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。一種應用於觸控辨識裝置之感測模組，其中觸控辨識裝置具有複數個驅動電極及複數個感應電極(未圖示)。感測模組包括：至少一第一相位電路10，電性連接驅動電極及感應電極；複數個第二相位電路20，電性連接驅動電極及感應電極；以及，至少一類比數位轉換電路30，電性連接第一相位電路10及複數個第二相位電路20。在本實施例中，類比數位轉換電路之數量是相對應於第二相位電路20的數量。
Please refer to the first figure, which is a schematic diagram of a sensing module applied to a touch recognition device according to the first embodiment of the present invention. A sensing module applied to a touch identification device, wherein the touch identification device has a plurality of driving electrodes and a plurality of sensing electrodes (not shown). The sensing module includes: at least one
在本實施例中，每一第二相位電路20依序會同第一相位電路10進行量測，分別同步得到一第一訊號及一第二訊號；類比數位轉換電路30用以接收第一訊號及第二訊號，來轉換得到一量測訊號。其中，第一相
位電路10所得到之第一訊號與複數個第二相位電路20所得到之第二訊號的相位訊號是180度偏移。其中，第一相位電路10為一反向量測電路，其所得到第一訊號為一反向訊號，複數個第二相位電路20為一正向量測電路，其所得到該第二訊號為一正向訊號。
In this embodiment, each
在一實施例中，感測模組更包括一處理單元(未圖示)，處理單元電性連接複數個類比數位轉換電路，用以將第一訊號及第二訊號進行差分運算，以得到量測訊號。其中，無指向元件例如液體或手掌接觸觸控辨識裝置時，則量測訊號為一基底訊號；若有指向元件例如手指或觸控筆接觸觸控辨識裝置，則量測訊號為一接觸訊號。處理單元電性連接複數個類比數位轉換電路30，用以計算基底訊號及接觸訊號之差值，以產生一觸控訊號。
In one embodiment, the sensing module further includes a processing unit (not shown), and the processing unit is electrically connected to a plurality of analog-to-digital conversion circuits for performing differential operations on the first signal and the second signal to obtain a quantitative test signal. Wherein, when no pointing element such as liquid or palm contacts the touch recognition device, the measurement signal is a base signal; if a pointing element such as a finger or a stylus touches the touch recognition device, the measurement signal is a contact signal. The processing unit is electrically connected to a plurality of analog-to-
如第二圖所示，係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。感測模組更包括一多工器40，電性連接於第一及第二相位電路10/20與類比數位轉換電路30之間。本實施例通過多工器40的設置來調整第一及第二相位電路10/20與類比數位轉換電路30的連結關係，僅需一個類比數位轉換電路30，而節省掉類比數位轉換電路30的使用數量。
As shown in the second figure, it is a schematic diagram of a sensing module applied to a touch recognition device according to the second embodiment of the present invention. The sensing module further includes a
藉由本發明實施例的量測電路設計，直接採用至少一個反向量測電路來得到一反向訊號(負訊號值)，以作為參考基準。當觸控辨識裝置的感測過程中，若有任何雜訊例如液晶顯示面板(LCD)雜訊隨之進入，本發明中的正向量測電路20搭配至少一個反向量測電路10同步所讀取之兩訊號值，利用雜訊不會因讀取量測方式而改變其”正負向”相位訊號的特性，將上
述同步讀取的兩訊號做差分，可相互抵消LCD雜訊。此外，利用同步讀取訊號的特性，避免雜訊在不同量測時點出現，容易造成量測誤差的問題。因此，本發明可減少同步處理的時間，並且提高整體精確度。
With the design of the measurement circuit of the embodiment of the present invention, at least one reverse measurement circuit is directly used to obtain a reverse signal (negative signal value), which is used as a reference. During the sensing process of the touch recognition device, if any noise such as liquid crystal display panel (LCD) noise enters, the
請參考第三圖，係為本發明第一或第二實施例中一種應用於觸控辨識裝置之感測方法的流程圖，觸控辨識裝置例如觸控面板或觸控螢幕。一種應用於觸控辨識裝置之感測方法，包括：步驟S10：提供至少一第一相位電路，電性連接複數個驅動電極及複數個感應電極；步驟S11：提供複數個第二相位電路，電性連接複數個驅動電極及複數個感應電極；步驟S12：每一第二相位電路依序會同第一相位電路進行量測，使得第一相位電路及第二相位電路分別同步得到一第一訊號及一第二訊號。其中，第一相位電路所得到之第一訊號與複數個第二相位電路所得到之第二訊號的相位訊號是180度偏移。在本實施例中，第一相位電路為一反向量測電路，其所得到第一訊號為一反向訊號，複數個第二相位電路為一正向量測電路，其所得到該第二訊號為一正向訊號。 Please refer to FIG. 3 , which is a flowchart of a sensing method applied to a touch recognition device, such as a touch panel or a touch screen, according to the first or second embodiment of the present invention. A sensing method applied to a touch recognition device, comprising: step S10: providing at least one first phase circuit, electrically connecting a plurality of driving electrodes and a plurality of sensing electrodes; step S11: providing a plurality of second phase circuits, electrically connecting a plurality of driving electrodes and a plurality of sensing electrodes; The plurality of driving electrodes and the plurality of sensing electrodes are sexually connected; Step S12: each second phase circuit is sequentially measured with the first phase circuit, so that the first phase circuit and the second phase circuit are synchronized to obtain a first signal and A second signal. The phase signals of the first signal obtained by the first phase circuit and the second signals obtained by the plurality of second phase circuits are offset by 180 degrees. In this embodiment, the first phase circuit is a reverse measurement circuit, and the first signal obtained by it is a reverse signal, and the plurality of second phase circuits are a forward measurement circuit, and the second phase circuit obtained by the second phase circuit is a forward measurement circuit. The signal is a positive signal.
步驟S13：最後，通過一類比數位轉換電路接收第一訊號及第二訊號，以轉換得到一量測訊號。 Step S13: Finally, receive the first signal and the second signal through an analog-to-digital conversion circuit to convert to obtain a measurement signal.
除上述步驟S10-S13，感測方法更包括：提供一處理單元以將第一訊號及第二訊號進行差分運算，以得到量測訊號。 In addition to the above steps S10-S13, the sensing method further includes: providing a processing unit to perform a differential operation on the first signal and the second signal to obtain a measurement signal.
在一實施例中，若觸控面板上提供配置有30條量測電路，其中可設置3條反向量測電路，每10條量測電路中有一條反向量測電路並搭配 設置一個類比數位轉換電路，使得3組量測電路同時進行，可加快同步處理的時間，令感測模組的操作速度更快。 In one embodiment, if 30 measurement circuits are provided and configured on the touch panel, 3 reverse measurement circuits can be set, and one reverse measurement circuit is matched with every 10 measurement circuits. An analog-to-digital conversion circuit is set up, so that three sets of measurement circuits are performed at the same time, which can speed up the synchronization processing time and make the operation speed of the sensing module faster.
請參考第四圖，係為本發明第三實施例及第四實施例中一種應用於觸控辨識裝置之感測方法的流程圖。一種應用於觸控辨識裝置之感測方法，包括： Please refer to FIG. 4 , which is a flowchart of a sensing method applied to a touch recognition device according to the third embodiment and the fourth embodiment of the present invention. A sensing method applied to a touch recognition device, comprising:
步驟S20：指定複數個奇數量測電路之至少其一者為一第一反向量測電路N，且其餘者電性連接一正向量測電路P。特別地是，於初始未作動量測前，正向量測電路電性連接一模擬電壓變化產生的完美指令，使得正向量測電路產生一初始訊號，利用初始訊號進行先期校正。其中完美指令是為了產生不帶雜訊的量測訊號，完美指令可用電路呈現或是直接提供訊號。 Step S20 : Designate at least one of the plurality of odd-numbered measurement circuits to be a first reverse measurement circuit N, and the rest are electrically connected to a forward measurement circuit P. In particular, before the initial measurement is not performed, the forward measurement circuit is electrically connected to a perfect command generated by an analog voltage change, so that the forward measurement circuit generates an initial signal and uses the initial signal to perform pre-calibration. The perfect command is to generate a measurement signal without noise, and the perfect command can be presented by a circuit or directly provide a signal.
步驟S21：進行一第一量測循環，第一反向量測電路依序會同其餘者之正向量測電路P進行量測，分別同時由第一反向量測電路得到一第一反向訊號，且由正向量測電路P得到複數個第一正向訊號。其中，第一反向訊號及的第一正向訊號相位訊號是180度偏移。 Step S21 : Perform a first measurement cycle, the first reverse measurement circuit performs measurements in sequence with the remaining forward measurement circuits P, and simultaneously obtain a first reverse measurement from the first reverse measurement circuit. signal, and a plurality of first forward signals are obtained from the forward vector measuring circuit P. The phase signals of the first reverse signal and the first forward signal are offset by 180 degrees.
步驟S22：將第一反向訊號及複數個第一正向訊號依序進行差分運算，以得到複數個第一量測訊號。 Step S22: Perform a differential operation on the first reverse signal and the plurality of first forward signals in sequence to obtain a plurality of first measurement signals.
步驟S23：指定複數個偶數量測電路之至少其一者為一第二反向量測電路N，且其餘者電性連接該正向量測電路P。 Step S23 : Designate at least one of the plurality of even measurement circuits to be a second reverse measurement circuit N, and the rest are electrically connected to the forward measurement circuit P.
步驟S24：進行一第二量測循環，第二反向量測電路依序會同其餘者之正向量測電路P進行量測，分別同時由第二反向量測電路得到一第二反向訊號，由正向量測電路P得到複數個第二正向訊號。 Step S24 : performing a second measurement cycle, the second reverse measurement circuit performs measurements in sequence with the remaining forward measurement circuits P, and simultaneously obtains a second reverse measurement from the second reverse measurement circuit. The signal is obtained from the forward measuring circuit P to obtain a plurality of second forward signals.
步驟S25：將第二反向訊號及複數個第二正向訊號依序進行差分運算，以得到複數個第二量測訊號。 Step S25: Perform a differential operation on the second reverse signal and the plurality of second forward signals in sequence to obtain a plurality of second measurement signals.
除上述步驟S20-S25，感測方法更包括：通過一處理單元計算初始訊號、第一量測訊號及第二量測訊號，以產生一觸控值容許範圍：接著，重複進行第一或第二量測循環，以得到一第一或第二新量測訊號：比較第一或第二新量測訊號是否落在觸控值容許範圍中；以及，若是落在觸控值容許範圍中，則輸出第一或第二新量測訊號。 In addition to the above steps S20-S25, the sensing method further includes: calculating the initial signal, the first measurement signal and the second measurement signal through a processing unit to generate an allowable range of touch values; then, repeating the first or the first Two measurement cycles to obtain a first or second new measurement signal: comparing whether the first or second new measurement signal falls within the touch value tolerance range; and, if it falls within the touch value tolerance range, Then the first or second new measurement signal is output.
在一實施例中，若無指向元件例如液體或手掌接觸觸控面板，則第一及第二量測訊號為一基底訊號。若有指向元件例如手指或觸控筆接觸觸控面板，則第一及第二量測訊號為一接觸訊號。上述步驟更包括通過一處理單元計算基底訊號及接觸訊號之差值，以產生一觸控訊號。 In one embodiment, if no pointing element such as liquid or palm contacts the touch panel, the first and second measurement signals are a base signal. If a pointing element such as a finger or a stylus touches the touch panel, the first and second measurement signals are contact signals. The above steps further include calculating the difference between the base signal and the touch signal through a processing unit to generate a touch signal.
請見第五圖及第六圖，分別係為第三實施例及第四實施例中中一種應用於觸控辨識裝置之感測模組的示意圖。如第五圖所示，一種觸控辨識裝置之感測模組，包括：複數個正向量測電路20、反向量測電路21/22及複數個類比數位轉換電路30。
Please refer to FIG. 5 and FIG. 6 , which are schematic diagrams of a sensing module applied to a touch recognition device in the third embodiment and the fourth embodiment, respectively. As shown in FIG. 5 , a sensing module of a touch recognition device includes a plurality of forward measuring
奇數量測電路於本實施例中的數量為2m-1個，其中奇數量測電路之至少其一者為一第一反向量測電路21，其餘者電性連接一正向量測電路20，奇數量測電路之其餘者依序會同第一反向量測電路21進行量測，分別同步得到一第一反向訊號及一第一正向訊號。偶數量測電路於本實施例中的數量為2m個，與複數個奇數量測電路交錯排列，其中偶數量測電路之至少其一者為一第二反向量測電路22，其餘者電性連接正向量測電路20，偶數量測電路之其餘者依序會同第二反向量測電路22進行量測，分
別同步得到一第二反向訊號及一第二正向訊號。
In this embodiment, the number of odd-numbered measurement circuits is 2m−1, wherein at least one of the odd-numbered measurement circuits is a first
類比數位轉換電路30分別電性連接複數個奇數量測電路及複數個偶數量測電路，用以接收第一/第二正向訊號及第一/第二反向訊號，分別轉換得到一第一量測訊號及一第二量測訊號。於本實施例中，類比數位轉換電路30的數量是一對一於正向量測電路20的數量，但本發明不限於此。感測模組更包括一處理單元(未圖示)，處理單元電性連接複數個奇數量測電路及複數個偶數量測電路，用以計算第一量測訊號及第二量測訊號，以產生一觸控值容許範圍。
The analog-to-
第六圖所示的一種觸控辨識裝置之感測模組與第五圖所示感測模組相比，更包括兩個多工器40a及40b，但僅有一個類比數位轉換電路30。奇數量測電路透過多工器40a電性連接類比數位轉換電路30，偶數量測電路透過多工器40b電性連接類比數位轉換電路30。本實施例可簡化感測模組的電路整體，但不限於此。
Compared with the sensing module shown in FIG. 5 , the sensing module of a touch recognition device shown in FIG. 6 further includes two
由於上述實施例中具有至少2條以上的反向量測電路，因此在本實施例中，第一條反向量測電路21可以利用多工器，來作為正向量測電路或是連接上正向量測電路，並藉由另一組反向量測電路22來得到一負訊號值，以做為參考基準。
Since there are at least two reverse measurement circuits in the above embodiment, in this embodiment, the first
藉由本發明實施例的量測電路設計，具有多項優點：可省去多個配對訊號線，且反向訊號與正向訊號可以同步發出，因此也省去了進行訊號同步處理的時間。由於不需要準備配對訊號線，因此可以將所有線路用來作為訊號量測，相較傳統的作法更為經濟。此外，比起習知的差分法，本發明的感測模組使得整體量測操作速度更快，且不會降低精準度， 並利用反向量測電路與正向量測電路來感測且同時驅動，不會產生時間差的問題。 The measurement circuit design of the embodiment of the present invention has several advantages: multiple paired signal lines can be omitted, and the reverse signal and the forward signal can be sent out synchronously, thus saving time for signal synchronization processing. Since there is no need to prepare paired signal lines, all lines can be used for signal measurement, which is more economical than traditional methods. In addition, compared with the conventional differential method, the sensing module of the present invention makes the overall measurement operation faster without reducing the accuracy, And using the reverse measurement circuit and the forward measurement circuit to sense and drive at the same time, there is no problem of time difference.
S10-S13‧‧‧步驟 S10-S13‧‧‧Steps
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