Claims (18)
一種具自動校正的電容式觸控系統，包含：複數第一電極及複數第二電極，該些第一電極與第二電極的交叉處定義複數觸控點；一驅動信號產生器，其依序提供驅動信號給該些第一電極，被驅動的該第一電極將該驅動信號藉由電容耦合效應而產生複數感應信號分別位於該些第二電極；一感應信號接收器，接收並處理該些感應信號；一位置偵測器，其於每一量測期間根據被驅動的該第一電極以及該些感應信號，以偵測決定碰觸點的位置；及一初始值產生器，至少部分該觸控點在未被碰觸之狀態下的感應信號被預先量測並儲存於該初始值產生器，於每一量測期間的開始，該初始值產生器根據預存的感應信號以產生該些第二電極之感應信號的初始值，並提供給該感應信號接收器，用以對其進行初始化；其中該感應信號接收器包含複數積分器，其輸入端分別電性耦接於該些第二電極，其輸出饋至該位置偵測器；其中該初始值產生器包含一數位至類比轉換器(DAC)，將該初始值轉換為類比型式後，依次饋至該感應信號接收器的該些積分器，以進行該些積分器的初始化。
A capacitive touch system with automatic correction includes: a plurality of first electrodes and a plurality of second electrodes, wherein a plurality of touch points are defined at intersections of the first electrodes and the second electrodes; and a driving signal generator is sequentially Providing a driving signal to the first electrodes, the driven first electrode generates a complex sensing signal by the capacitive coupling effect, respectively, at the second electrodes; an inductive signal receiver, receiving and processing the An inductive signal; a position detector that detects the position of the touch contact according to the driven first electrode and the sensing signals during each measurement period; and an initial value generator, at least part of the The sensing signal of the touch point in the untouched state is pre-measured and stored in the initial value generator, and at the beginning of each measurement period, the initial value generator generates the some according to the pre-stored sensing signal. An initial value of the sensing signal of the second electrode is provided to the sensing signal receiver for initializing it; wherein the sensing signal receiver includes a complex integrator, and the input terminal thereof Electrically coupled to the second electrodes, the output of which is fed to the position detector; wherein the initial value generator comprises a digital to analog converter (DAC), and the initial value is converted into an analog type, and then sequentially fed The integrators to the inductive signal receiver perform initialization of the integrators.
如申請專利範圍第1項所述具自動校正的電容式觸控系統，其中該積分器包含：一放大器；
一積分電容器，可控地電性耦接於該放大器的輸入端與輸出端之間；及至少一積分開關及至少一初始開關，於進行積分時，該積分開關使得該積分電容器電性耦接於該放大器的輸入端與輸出端之間，用以得到積分感應信號；於進行初始化時，該初始開關使得該積分電容器電性耦接於該初始值產生器與一參考電位之間，用以對該積分器進行預充電(pre-charge)以執行初始化。
The capacitive touch system with automatic correction according to claim 1, wherein the integrator comprises: an amplifier;
An integrating capacitor is controllably electrically coupled between the input end and the output end of the amplifier; and at least one integrating switch and at least one initial switch, the integrating switch electrically coupling the integrating capacitor when integrating Between the input end and the output end of the amplifier, an integrated sensing signal is obtained. When initializing, the initial switch electrically couples the integrating capacitor between the initial value generator and a reference potential for The integrator is pre-charged to perform initialization.
如申請專利範圍第2項所述具自動校正的電容式觸控系統，其中該放大器包含一運算放大器，其反向輸入端與輸出端可控地耦接於該積分電容器的兩端。
The capacitive touch system with automatic correction as described in claim 2, wherein the amplifier comprises an operational amplifier, and the inverting input end and the output end are controllably coupled to both ends of the integrating capacitor.
如申請專利範圍第1項所述具自動校正的電容式觸控系統，其中該初始值產生器包含：一初始值表格，其儲存至少一部分該些觸控點的初始值；及一控制器，用以將該初始值饋至該數位至類比轉換器。
The method of claim 1, wherein the initial value generator comprises: an initial value table storing at least a portion of the initial values of the touch points; and a controller, Used to feed the initial value to the digit to the analog converter.
如申請專利範圍第4項所述具自動校正的電容式觸控系統，其中未儲存於該初始值表格的觸控點之初始值由該控制器根據該儲存之初始值經內插運算得到。
For example, in the capacitive touch system with automatic correction described in claim 4, the initial value of the touch point not stored in the initial value table is obtained by the controller according to the initial value of the storage.
如申請專利範圍第4項所述具自動校正的電容式觸控系統，其中該初始值表格儲存於一非揮發性記憶體。
The capacitive touch system with automatic correction as described in claim 4, wherein the initial value table is stored in a non-volatile memory.
如申請專利範圍第1項所述具自動校正的電容式觸控系統，其中該感應信號接收器更包含一電路，用以得到相鄰該第二電極的感應信號差值，以饋至該積分器。
The capacitive touch system with automatic correction according to claim 1, wherein the sensing signal receiver further comprises a circuit for obtaining an induced signal difference value adjacent to the second electrode to feed the integral Device.
一種具自動校正的電容式觸控方法，包含：
(a)提供複數第一電極及複數第二電極，該些第一電極與第二電極的交叉處定義複數觸控點；(b)依序提供驅動信號給該些第一電極，被驅動的該第一電極將該驅動信號藉由電容耦合效應而產生複數感應信號分別位於該些第二電極；(c)接收並處理該些感應信號；(d)於每一量測期間，根據被驅動的該第一電極以及該些感應信號，以偵測決定碰觸點的位置；(e)預先量測並儲存至少部分該觸控點在未被碰觸之狀態下的感應信號；及(f)於每一量測期間的開始，根據預存的感應信號以產生該些第二電極之感應信號的初始值，用以進行積分的初始化；其中該步驟(f)包含將該初始值轉換為類比型式後，依次進行積分的初始化。
A capacitive touch method with automatic correction, comprising:
(a) providing a plurality of first electrodes and a plurality of second electrodes, wherein the intersections of the first electrodes and the second electrodes define a plurality of touch points; (b) sequentially providing driving signals to the first electrodes, driven The first electrode generates a complex sensing signal by the capacitive coupling effect at the second electrodes; (c) receiving and processing the sensing signals; (d) being driven according to each measurement period The first electrode and the sensing signals are used to detect the position of the touch contact; (e) pre-measure and store at least a portion of the sensing signal of the touch point in an untouched state; and (f Starting at the beginning of each measurement period, based on the pre-stored sensing signals to generate initial values of the sensing signals of the second electrodes for initializing the integration; wherein the step (f) includes converting the initial values into analogies After the type, the initialization of the integration is performed in sequence.
如申請專利範圍第8項所述具自動校正的電容式觸控方法，其中該步驟(c)包含複數積分步驟，其分別電性耦接該些第二電極以輸入該感應信號，經積分後將積分結果提供給步驟(d)。
The method of claim 2, wherein the step (c) includes a plurality of integration steps, respectively, electrically coupling the second electrodes to input the sensing signal, and integrating the The integration result is supplied to step (d).
如申請專利範圍第9項所述具自動校正的電容式觸控方法，其中該積分步驟更包含：於進行初始化時，進行預充電(pre-charge)以執行積分的初始化。
The capacitive touch method with automatic correction according to claim 9 , wherein the integrating step further comprises: performing pre-charge to perform initialization of the integration when performing initialization.
如申請專利範圍第9項所述具自動校正的電容式觸控方法，其中該步驟(e)包含：使用一初始值表格，以儲存至少一部分該些觸控點的初始值。
The method of claim 2, wherein the step (e) comprises: using an initial value table to store at least a portion of the initial values of the touch points.
如申請專利範圍第11項所述具自動校正的電容式觸控方法，更包含：
根據該儲存之初始值，經內插運算後，以得到未儲存於該初始值表格的觸控點之初始值。
The capacitive touch method with automatic correction as described in claim 11 of the patent application scope includes:
According to the initial value of the storage, after the interpolation operation, an initial value of the touch point not stored in the initial value table is obtained.
如申請專利範圍第11項所述具自動校正的電容式觸控方法，其中該初始值表格儲存於一非揮發性記憶體。
The method of claim 1 , wherein the initial value table is stored in a non-volatile memory.
如申請專利範圍第9項所述具自動校正的電容式觸控方法，更包含一步驟，用以得到相鄰該第二電極的感應信號差值，以提供給該積分步驟。
The capacitive touch method with automatic correction as described in claim 9 further includes a step of obtaining a difference of induced signals adjacent to the second electrode to provide the integration step.
一種具自動校正的偵測電路，包含：一信號接收器，具有至少一偵測器，每一偵測器在至少一量測期間的每一量測期間偵測一信號；一初始值產生器，預先量測並儲存至少部份偵測器在至少一量測期間的每一量測期間的初始值，於每一量測期間的開始，該初始值產生器依據預存的初始值提供給該信號接收器，用以對其進行初始化；其中該信號接收器包含複數積分器；其中該初始值產生器包含一數位至類比轉換器(DAC)，將該初始值轉換為類比型式後，依次饋至該信號接收器的該些積分器，以進行該些積分器的初始化。
A detection circuit with automatic correction includes: a signal receiver having at least one detector, each detector detecting a signal during each measurement period of at least one measurement period; an initial value generator Pre-measuring and storing an initial value of at least a portion of the detector during each measurement period of the at least one measurement period, the initial value generator providing the initial value according to the pre-stored initial value at the beginning of each measurement period a signal receiver for initializing the signal; wherein the signal receiver comprises a complex integrator; wherein the initial value generator comprises a digital to analog converter (DAC), and the initial value is converted into an analog type The integrators to the signal receiver are used to initialize the integrators.
如申請專利範圍第15項所述具自動校正的偵測電路，其中預存的每一初始值是以數位形式儲存，並且以類比信號提供給該信號接收器。
The detection circuit with automatic correction as described in claim 15 wherein each of the pre-stored initial values is stored in digital form and supplied to the signal receiver as an analog signal.
如申請專利範圍第15項所述具自動校正的偵測電路，其中至少部份偵測器在至少一量測期間的每一量測期間預存的初始值是依據相應的偵測器在相應的量測期間偵測的該信號產生。
The detection circuit with automatic correction as described in claim 15 of the patent application, wherein at least part of the detectors pre-stored the initial value during each measurement period of at least one measurement period according to the corresponding detector in the corresponding This signal is detected during measurement.
如申請專利範圍第15項所述具自動校正的偵測電路，其中該初始值產生器是預存部份偵測器在至少一量測期間的每一量測期間的初始值，並且是內插運算來得到未儲存於該初始值表格的觸控點之初始值，以提供給該感應信號接收器。
The detection circuit with automatic correction as described in claim 15 wherein the initial value generator is an initial value of the pre-stored partial detector during each measurement period of at least one measurement period, and is interpolated. An operation is performed to obtain an initial value of a touch point that is not stored in the initial value table to be provided to the sensing signal receiver.