TW202107257A - Touch detecting method, touch display driving integrated chip and information processing apparatus enabling a touch scanning operation of a touch unit according to the first synchronization signal or the second synchronization signal - Google Patents
Touch detecting method, touch display driving integrated chip and information processing apparatus enabling a touch scanning operation of a touch unit according to the first synchronization signal or the second synchronization signal Download PDFInfo
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Abstract
Description
本發明係關於觸控偵測，尤指一種觸控顯示裝置的觸控檢測方法。The present invention relates to touch detection, in particular to a touch detection method of a touch display device.
觸控螢幕已被廣泛地應用於各種電子裝置中。通常，觸控螢幕包含一顯示面板和一觸控面板，且此二者分別由一顯示驅動晶片和一觸控驅動晶片所控制。近年來，隨著內嵌式觸控螢幕技術之成熟，對於顯示面板及觸控面板之控制設計方案也朝向將顯示驅動電路與觸控驅動電路一起整合在單一晶片中，即，觸控顯示驅動整合晶片。Touch screens have been widely used in various electronic devices. Generally, a touch screen includes a display panel and a touch panel, and the two are controlled by a display driver chip and a touch driver chip, respectively. In recent years, with the maturity of in-cell touch screen technology, control design solutions for display panels and touch panels are also moving towards integrating the display drive circuit and the touch drive circuit into a single chip, that is, the touch display drive Integrated chip.
為了確保觸控檢測不會有漏偵測的現象，觸控顯示驅動整合晶片一般會令觸控掃描信號的檢測幀率與顯示驅動信號的顯示幀率之間具有一固定比例，例如，以120Hz的檢測幀率對應60Hz的顯示幀率。In order to ensure that there is no missing detection in touch detection, the touch display driver integrated chip generally makes the detection frame rate of the touch scan signal and the display frame rate of the display driving signal have a fixed ratio, for example, at 120Hz The detection frame rate corresponds to the display frame rate of 60Hz.
圖1繪示一習知觸控顯示驅動整合晶片內部之一同步信號產生單元所產生的同步信號波形圖。值得說明的是，現有的觸控顯示驅動整合晶片通常會整合有一同步信號產生單元以產生一垂直同步信號(VSYNC)，以驅動一顯示驅動模塊及一觸控驅動模塊。由圖1可知，在顯示幀率為60Hz時，每一幀顯示時間約為16.67ms，而在此期間共執行了兩次觸控檢測作業。FIG. 1 shows a waveform diagram of a synchronization signal generated by a synchronization signal generating unit inside a conventional touch display driver integrated chip. It is worth noting that the existing touch display driving integrated chip usually integrates a synchronization signal generating unit to generate a vertical synchronization signal (VSYNC) to drive a display driving module and a touch driving module. It can be seen from FIG. 1 that when the display frame rate is 60 Hz, the display time of each frame is about 16.67 ms, and during this period, two touch detection operations are performed.
另外，觸控檢測可在多種模式間切換，例如：在低功耗檢測模式與正常檢測模式之間切換；或變換觸控掃描信號的頻率。一般而言，不同的觸控檢測模式所需設定的電路參數也會不同，例如：偏置電流、參考電壓、電阻、電容、電路啟動時間等。在一觸控顯示驅動整合晶片工作時，通常利用以下3個操作程序完成觸控檢測模式之切換：1.停止觸控檢測(也就是說，禁能觸控檢測作業)；2.切換電路參數；以及3.重新啟動觸控檢測。In addition, the touch detection can be switched between multiple modes, for example: switching between a low-power detection mode and a normal detection mode; or changing the frequency of the touch scan signal. Generally speaking, the circuit parameters that need to be set for different touch detection modes are also different, such as: bias current, reference voltage, resistance, capacitance, circuit startup time, and so on. When a touch display driving integrated chip is working, the following 3 operating procedures are usually used to complete the switching of the touch detection mode: 1. Stop the touch detection (that is, disable the touch detection operation); 2. Switch the circuit parameters ; And 3. Restart the touch detection.
圖2繪示一習知觸控顯示驅動整合晶片之觸控檢測模式切換的操作示意圖。如圖2所示，一切換電路參數的軟體操作期間剛好遇到垂直同步信號(VSYNC)的一脈衝，在此軟體操作期間，一觸控偵測單元會不理會垂直同步信號的脈衝的作用而使觸控檢測作業停止。在過了該軟體操作期間後，該觸控偵測單元必須等到垂直同步信號的下一個脈衝才會重啟觸控檢測作業。因此，若所述觸控檢測作業中的一次觸控檢測周期為8.33ms，則一觸摸點最久可能要花25ms(=16.67ms+8.33ms)才會輪到被偵測。然而，若一觸摸操作的持續時間小於25ms，則該觸摸操作就會被漏偵測。FIG. 2 shows a schematic diagram of the operation of switching the touch detection mode of a conventional touch display driver integrated chip. As shown in Figure 2, a software operation period for switching circuit parameters just encounters a pulse of the vertical synchronization signal (VSYNC). During this software operation, a touch detection unit ignores the effect of the pulse of the vertical synchronization signal. Stop the touch detection operation. After the software operation period has elapsed, the touch detection unit must wait until the next pulse of the vertical synchronization signal to restart the touch detection operation. Therefore, if a touch detection cycle in the touch detection operation is 8.33ms, it may take up to 25ms (=16.67ms+8.33ms) for a touch point to be detected. However, if the duration of a touch operation is less than 25ms, the touch operation will be missed.
由上述說明可知，本領域亟需一種新穎的觸控檢測方法。It can be seen from the above description that there is an urgent need for a novel touch detection method in the art.
本發明之主要目的在於提供一種觸控檢測方法，其能夠避免在觸控偵測模式的切換過程中發生觸摸操作漏偵測的現象。The main purpose of the present invention is to provide a touch detection method, which can avoid the phenomenon of missing touch operation detection during the switching process of the touch detection mode.
為達成上述目的，一種觸控檢測方法乃被提出，其係實現在一觸控顯示裝置中，該方法包括以下步驟：To achieve the above objective, a touch detection method is proposed, which is implemented in a touch display device. The method includes the following steps:
依一第一同步信號產生一第二同步信號，其中，該第一同步信號係與一垂直同步信號同步，該垂直同步信號係用以起始一幀畫面繪示作業且其具有一周期T1，該第二同步信號落後該第一同步信號一預定時間t，T2＜t＜(T1-T2)，T2代表一觸控掃描周期，且T1＞T2＞0；以及A second synchronization signal is generated according to a first synchronization signal, wherein the first synchronization signal is synchronized with a vertical synchronization signal, and the vertical synchronization signal is used to initiate a frame image drawing operation and has a period T1, The second synchronization signal lags the first synchronization signal by a predetermined time t, T2<t<(T1-T2), T2 represents a touch scan period, and T1>T2>0; and
依該第一同步信號或該第二同步信號致能一觸控單元之一觸控掃描作業，其中該觸控掃描作業包括至少一個所述觸控掃描周期。A touch scan operation of a touch unit is enabled according to the first synchronization signal or the second synchronization signal, wherein the touch scan operation includes at least one touch scan period.
在一實施例中，該觸控單元具有一觸控模式切換功能，且當該觸控單元執行該觸控模式切換功能時，該觸控掃描作業會被禁能。In one embodiment, the touch unit has a touch mode switching function, and when the touch unit executes the touch mode switching function, the touch scan operation is disabled.
在一實施例中，該第一同步信號和該第二同步信號係由一時序控制單元產生。In an embodiment, the first synchronization signal and the second synchronization signal are generated by a timing control unit.
在一實施例中，該觸控單元係與一繪示驅動單元整合在一觸控顯示驅動整合晶片中。In one embodiment, the touch unit and a display drive unit are integrated in a touch display drive integrated chip.
為達上述目的，本發明進一步提出一種觸控顯示驅動整合晶片以執行一觸控檢測方法，該方法包括以下步驟：To achieve the above objective, the present invention further provides a touch display drive integrated chip to perform a touch detection method, the method includes the following steps:
依一第一同步信號產生一第二同步信號，其中，該第一同步信號係與一垂直同步信號同步，該垂直同步信號係用以起始一幀畫面繪示作業且其具有一周期T1，該第二同步信號落後該第一同步信號一預定時間t，T2＜t＜(T1-T2)，T2代表一觸控掃描周期，且T1＞T2＞0；以及A second synchronization signal is generated according to a first synchronization signal, wherein the first synchronization signal is synchronized with a vertical synchronization signal, and the vertical synchronization signal is used to initiate a frame image drawing operation and has a period T1, The second synchronization signal lags the first synchronization signal by a predetermined time t, T2<t<(T1-T2), T2 represents a touch scan period, and T1>T2>0; and
依該第一同步信號或該第二同步信號致能一觸控單元之一觸控掃描作業，其中該觸控掃描作業包括至少一個所述觸控掃描周期。A touch scan operation of a touch unit is enabled according to the first synchronization signal or the second synchronization signal, wherein the touch scan operation includes at least one touch scan period.
在一實施例中，該觸控單元具有一觸控模式切換功能，且當該觸控單元執行該觸控模式切換功能時，該觸控掃描作業會被禁能。In one embodiment, the touch unit has a touch mode switching function, and when the touch unit executes the touch mode switching function, the touch scan operation is disabled.
在一實施例中，該第一同步信號和該第二同步信號係由一時序控制單元產生。In an embodiment, the first synchronization signal and the second synchronization signal are generated by a timing control unit.
為達上述目的，本發明進一步提出一種資訊處理裝置，其具有一中央處理單元及一觸控顯示裝置，該觸控顯示裝置具有如前述之觸控顯示驅動整合晶片，且該中央處理單元係用以與所述之觸控顯示驅動整合晶片通信。To achieve the above objective, the present invention further provides an information processing device, which has a central processing unit and a touch display device, the touch display device has the aforementioned touch display drive integrated chip, and the central processing unit is used To communicate with the integrated chip of the touch display driver.
在可能的實施例中，該觸控顯示裝置可為液晶觸控顯示裝置、LED觸控顯示裝置或OLED觸控顯示裝置。In possible embodiments, the touch display device may be a liquid crystal touch display device, an LED touch display device, or an OLED touch display device.
在可能的實施例中，所述之資訊處理裝置可為智慧型手機、平板電腦、筆記型電腦、一體式電腦、智慧型手錶或門禁裝置。In possible embodiments, the information processing device may be a smart phone, a tablet computer, a notebook computer, an all-in-one computer, a smart watch, or an access control device.
為使 貴審查委員能進一步瞭解本發明之結構、特徵、目的、與其優點，茲附以圖式及較佳具體實施例之詳細說明如後。In order to enable your reviewer to further understand the structure, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred specific embodiments are attached as follows.
本發明主要提出一種觸控檢測方法，其係應用於採用一觸控顯示驅動整合晶片的一資訊處理裝置中，用以避免在觸控偵測模式的切換過程中發生觸摸操作漏偵測的現象，其中，所述資訊處理裝置可以是但不限於智慧型手機、平板電腦、筆記型電腦、一體式電腦、指紋式打卡裝置或門禁裝置等電子裝置。The present invention mainly provides a touch detection method, which is applied to an information processing device using a touch display drive integrated chip, so as to avoid the phenomenon of missing touch operation detection during the switching process of the touch detection mode , Wherein, the information processing device may be, but not limited to, an electronic device such as a smart phone, a tablet computer, a notebook computer, an all-in-one computer, a fingerprint punching device or an access control device.
請參照圖3，其繪示本發明之觸控檢測方法之一實施例的流程圖，該方法係實現在一觸控顯示裝置中，且其包括以下步驟：依一第一同步信號產生一第二同步信號，其中，該第一同步信號係與一垂直同步信號同步，該垂直同步信號係用以起始一幀畫面繪示作業且其具有一周期T1，該第二同步信號落後該第一同步信號一預定時間t，T2＜t＜(T1-T2)，T2代表一觸控掃描周期，且T1＞T2＞0(步驟a)；以及依該第一同步信號或該第二同步信號致能一觸控單元之一觸控掃描作業，其中該觸控掃描作業包括至少一個所述觸控掃描周期(步驟b)。Please refer to FIG. 3, which shows a flowchart of an embodiment of the touch detection method of the present invention. The method is implemented in a touch display device and includes the following steps: generating a first synchronization signal according to a first synchronization signal. Two synchronization signals, wherein, the first synchronization signal is synchronized with a vertical synchronization signal, the vertical synchronization signal is used to start a frame of picture drawing operation and has a period T1, and the second synchronization signal lags behind the first The synchronization signal is a predetermined time t, T2<t<(T1-T2), T2 represents a touch scan period, and T1>T2>0 (step a); and according to the first synchronization signal or the second synchronization signal A touch scan operation can be performed by a touch unit, wherein the touch scan operation includes at least one touch scan period (step b).
在步驟a中，該第一同步信號和該第二同步信號係由一時序控制單元產生。In step a, the first synchronization signal and the second synchronization signal are generated by a timing control unit.
在步驟b中，該觸控單元具有一觸控模式切換功能，且當該觸控單元執行該觸控模式切換功能時，該觸控掃描作業會被禁能。另外，該觸控單元係與一繪示驅動單元整合在一觸控顯示驅動整合晶片中。In step b, the touch unit has a touch mode switching function, and when the touch unit executes the touch mode switching function, the touch scan operation is disabled. In addition, the touch control unit is integrated with a display drive unit in a touch display drive integrated chip.
請參照圖4，其繪示圖3之觸控檢測方法所產生的一工作時序圖。如圖4所示，該第一同步信號具有一周期T1(=16.67ms)，該第二同步信號落後該第一同步信號一預定時間t，T2＜t＜(T1-T2)，T2代表一觸控掃描周期，且T1＞T2＞0。依此設計，即使在觸控偵測模式的切換期間剛好與該第一同步信號之一脈衝重疊，由於該第二同步信號之一脈衝可在該第一同步信號之下一個脈衝之前及時出現以啟動該觸控掃描作業，故該觸控單元乃可有效避免觸摸操作漏偵測的發生。Please refer to FIG. 4, which shows a working sequence diagram generated by the touch detection method of FIG. 3. As shown in FIG. 4, the first synchronization signal has a period T1 (=16.67 ms), and the second synchronization signal lags the first synchronization signal by a predetermined time t, T2<t<(T1-T2), and T2 represents one Touch scan period, and T1>T2>0. According to this design, even if it overlaps with a pulse of the first synchronization signal during the switching period of the touch detection mode, a pulse of the second synchronization signal can appear in time before the next pulse of the first synchronization signal. The touch scanning operation is activated, so the touch unit can effectively avoid the occurrence of missed detection of touch operations.
依上述的說明，本發明進一步提出一種資訊處理裝置。請參照圖5，其繪示本發明之資訊處理裝置之一實施例的方塊圖。如圖5所示，一資訊處理裝置100包括一中央處理單元110及一觸控顯示裝置120，其中，該觸控顯示裝置120具有一觸控顯示面板121及用以驅動觸控顯示面板121之一觸控顯示驅動整合晶片122，觸控顯示驅動整合晶片122係用以執行圖3之觸控檢測方法，且中央處理單元110係用以與觸控顯示驅動整合晶片122通信。Based on the above description, the present invention further provides an information processing device. Please refer to FIG. 5, which shows a block diagram of an embodiment of the information processing device of the present invention. As shown in FIG. 5, an
另外，觸控顯示裝置120可為液晶觸控顯示裝置、LED(light emitting diode；發光二極體)觸控顯示裝置或OLED(organic light emitting diode；有機發光二極體)觸控顯示裝置。In addition, the
如此，上述係已完整且清楚地說明本發明之一種觸控檢測方法；並且，經由上述可得知本發明係具有下列之優點：In this way, the above system has completely and clearly described a touch detection method of the present invention; and, from the above, it can be seen that the present invention has the following advantages:
本發明的觸控檢測方法能夠在觸控偵測模式的切換過程中避免觸摸操作的漏偵測發生。The touch detection method of the present invention can avoid missing detection of touch operations during the switching process of the touch detection mode.
必須加以強調的是，前述本案所揭示者乃為較佳實施例，舉凡局部之變更或修飾而源於本案之技術思想而為熟習該項技藝之人所易於推知者，俱不脫本案之專利權範疇。It must be emphasized that the foregoing disclosures in this case are preferred embodiments, and any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those who are familiar with the art will not deviate from the patent of this case. Right category.
綜上所陳，本案無論目的、手段與功效，皆繪示其迥異於習知技術，且其首先發明合於實用，確實符合發明之專利要件，懇請 貴審查委員明察，並早日賜予專利俾嘉惠社會，是為至禱。To sum up, regardless of the purpose, means and effects of this case, it is shown that it is very different from the conventional technology, and its first invention is suitable for practicality, and it does meet the patent requirements of the invention. I implore the reviewer to investigate and grant the patent as soon as possible. To benefit the society is to pray for the most.
＜本發明＞ 100:資訊處理裝置 110:中央處理單元 120:觸控顯示裝置 121:觸控顯示面板 122:觸控顯示驅動整合晶片 步驟a:依一第一同步信號產生一第二同步信號，其中，該第一同步信號係與一垂直同步信號同步，該垂直同步信號係用以起始一幀畫面繪示作業且其具有一周期T1，該第二同步信號落後該第一同步信號一預定時間t，T2＜t＜(T1-T2)，T2代表一觸控掃描周期 步驟b :依該第一同步信號或該第二同步信號致能一觸控單元之一觸控掃描作業，其中該觸控掃描作業包括至少一個所述觸控掃描周期 <The present invention> 100: Information processing device 110: Central Processing Unit 120: Touch display device 121: Touch display panel 122: Touch display driver integrated chip Step a: Generate a second synchronization signal according to a first synchronization signal, wherein the first synchronization signal is synchronized with a vertical synchronization signal, and the vertical synchronization signal is used to initiate a frame image drawing operation and has a Period T1, the second synchronization signal lags behind the first synchronization signal by a predetermined time t, T2<t<(T1-T2), T2 represents a touch scan period Step b: Activate a touch scan operation of a touch unit according to the first synchronization signal or the second synchronization signal, wherein the touch scan operation includes at least one of the touch scan periods
＜習知＞無＜Acquaintances＞ None
圖1繪示一習知觸控顯示驅動整合晶片內部之一同步信號產生單元所產生的同步信號波形圖； 圖2繪示一習知觸控顯示驅動整合晶片之觸控檢測模式切換的操作示意圖； 圖3繪示本發明之觸控檢測方法之一實施例的流程圖； 圖4繪示圖3之觸控檢測方法所產生的一工作時序圖；以及 圖5繪示本發明之資訊處理裝置之一實施例的方塊圖。FIG. 1 shows a waveform diagram of a synchronization signal generated by a synchronization signal generation unit inside a conventional touch display drive integrated chip; FIG. 2 shows a schematic diagram of the operation of switching the touch detection mode of a conventional touch display drive integrated chip; FIG. 3 shows a flowchart of an embodiment of the touch detection method of the present invention; FIG. 4 shows a working sequence diagram generated by the touch detection method of FIG. 3; and FIG. 5 shows a block diagram of an embodiment of the information processing device of the present invention.
步驟a:依一第一同步信號產生一第二同步信號，其中，該第一同步信號係與一垂直同步信號同步，該垂直同步信號係用以起始一幀畫面繪示作業且其具有一周期T1，該第二同步信號落後該第一同步信號一預定時間t，T2<t<(T1-T2)，T2代表一觸控掃描周期 Step a: Generate a second synchronization signal according to a first synchronization signal, wherein the first synchronization signal is synchronized with a vertical synchronization signal, and the vertical synchronization signal is used to initiate a frame image drawing operation and has a Period T1, the second synchronization signal lags the first synchronization signal by a predetermined time t, T2<t<(T1-T2), T2 represents a touch scan period
步驟b:依該第一同步信號或該第二同步信號致能一觸控單元之一觸控掃描作業，其中該觸控掃描作業包括至少一個所述觸控掃描周期 Step b: Activate a touch scan operation of a touch unit according to the first synchronization signal or the second synchronization signal, wherein the touch scan operation includes at least one of the touch scan periods
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