TWI649682B - Linear displacement noise suppression algorithm for touch and display drive integration system and touch display panel using the method to realize a touch display function - Google Patents
Linear displacement noise suppression algorithm for touch and display drive integration system and touch display panel using the method to realize a touch display function Download PDFInfo
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Abstract
一種觸控與顯示驅動整合系統線位移雜訊抑制演算法，其係利用一控制電路實現，包括以下步驟：依一觸控顯示面板之一線位移週期、一目前線位移索引值、一觸控驅動列數及一觸控感測接收行數決定一觸控偵測點陣列中的複數個目前雜訊點位置；依該觸控偵測點陣列的至少一次掃描偵測程序所產生的至少一個初始偵測資料陣列決定與所述複數個目前雜訊點位置對應的複數個雜訊參考資料，並將所述複數個雜訊參考資料儲存在一記憶區塊中；以及依所述複數個雜訊參考資料對該觸控偵測點陣列的下一次所述掃描偵測程序所產生的一下一次偵測資料陣列進行一補償運算，以消除該觸控偵測點陣列的雜訊。此外，本發明亦揭示一觸控顯示面板其採用如所述之觸控與顯示驅動整合系統線位移雜訊抑制演算法以實現一觸控顯示功能。 A touch and display drive integration system linear displacement noise suppression algorithm is implemented using a control circuit and includes the following steps: according to a linear displacement cycle of a touch display panel, a current linear displacement index value, and a touch drive The number of rows and the number of touch-sensing received rows determine the position of a plurality of current noise points in a touch detection point array; at least one initial generated by at least one scan detection process of the touch detection point array The detection data array determines a plurality of noise reference data corresponding to the plurality of current noise point positions, and stores the plurality of noise reference data in a memory block; and according to the plurality of noises The reference data performs a compensation operation on the next detection data array generated by the next scanning detection procedure of the touch detection point array to eliminate the noise of the touch detection point array. In addition, the present invention also discloses a touch display panel which adopts the linear displacement noise suppression algorithm of the touch and display drive integration system as described above to realize a touch display function.
Description
本發明係關於一種觸控與顯示驅動整合系統的雜訊抑制方法，特別是關於一種關於線位移雜訊抑制演算法。The present invention relates to a noise suppression method for a touch and display drive integration system, and more particularly to a linear displacement noise suppression algorithm.
隨著行動裝置的普及與蓬勃發展，觸控顯示裝置已經成為其中不可缺乏的零組件之一。傳統的系統架構中，觸控與顯示功能分別由觸控晶片與顯示晶片獨立控制，而觸控與顯示驅動器整合系統（Touch and Display Driver Integration，TDDI）藉由把觸控晶片與顯示晶片整合進單一晶片之技術，不但減少了元件的數量，使螢幕變得更薄、也能提升面板透光率，使電池續航時間相對變得更長。With the popularity and vigorous development of mobile devices, touch display devices have become one of the indispensable components. In the traditional system architecture, the touch and display functions are controlled independently by the touch chip and the display chip, respectively. The Touch and Display Driver Integration (TDDI) system integrates the touch chip and the display chip by The single chip technology not only reduces the number of components, makes the screen thinner, but also improves the light transmittance of the panel, making the battery life longer.
然而相對地，隨著手機越做越薄，卻使得驅動電極與感測電極因位於閘極線與資料線附近，而極易受到資料線的變化影響導致耦合干擾，此類內部雜訊會造成虛假和錯誤的響應，使得在觸控操作過程中出現觸控點的預測不準確和鋸齒形軌跡的輸出，從而影響用戶的體驗。However, in contrast, as mobile phones become thinner and thinner, the driving electrodes and sensing electrodes are located near the gate and data lines, which is extremely susceptible to coupling interference due to changes in the data lines. Such internal noise can cause False and wrong responses make the prediction of the touch points inaccurate during the touch operation and the output of the zigzag trajectory, thereby affecting the user experience.
此外，由於相鄰資料線之間存在的電阻差異，觸控與顯示驅動器整合系統在顯示過程中亦會出現Η-line (horizontal line；橫條紋)的不良現象。In addition, due to the resistance difference between adjacent data lines, the touch-and-display driver integration system may also exhibit a Η-line (horizontal line) defect during the display process.
為解決顯示幕的H line問題並防止面板負載過大，一般的做法會引入線位移(line shift)的畫面掃描方案。然而線位移的畫面掃描方案會因為在不同幀畫面的相同時間片段上，各閘極訊號所對應的觸控感測電極接收端位置會不同而導致在該些觸控感測電極接收端點出現雜訊，從而產生斜線雜訊問題並導致SNR（signal-to-noise ratio；訊號雜訊比）明顯下降。In order to solve the H line problem of the display screen and prevent the panel from being overloaded, a general approach will introduce a line shifting screen scanning scheme. However, the line-shifted picture scanning scheme will appear at the receiving end points of the touch sensing electrodes because the positions of the touch sensing electrode receiving ends corresponding to the gate signals will be different at the same time segment of different frame pictures. Noise, which causes oblique noise problems and causes a significant decrease in SNR (signal-to-noise ratio).
為解決上述問題，本領域亟需一新穎的觸控與顯示驅動整合系統線位移雜訊抑制演算法。In order to solve the above problems, a novel linear displacement noise suppression algorithm for a touch and display drive integration system is urgently needed in the art.
本發明之一目的在於揭露一種觸控與顯示驅動整合系統線位移雜訊抑制演算法，其係在不需增加硬體成本的前提下，藉由軟體演算方式決定出一觸控偵測點陣列中的複數個目前雜訊點位置。 An object of the present invention is to disclose a linear displacement noise suppression algorithm for a touch and display drive integration system, which determines a touch detection point array by software calculation without increasing hardware cost. The number of current noise point locations in.
本發明之另一目的在於揭露一種觸控與顯示驅動整合系統線位移雜訊抑制演算法，其係藉由觸控偵測點陣列的參考雜訊資料進行一補償運算以消除斜線雜訊，從而提高SNR(signal-to-noise ratio；訊號雜訊比)及改善觸控靈敏度。 Another object of the present invention is to disclose a linear displacement noise suppression algorithm for a touch and display drive integration system, which performs a compensation operation by using reference noise data of a touch detection point array to eliminate oblique line noise, thereby Improve SNR (signal-to-noise ratio; signal-to-noise ratio) and improve touch sensitivity.
為達前述目的，一種觸控與顯示驅動整合系統線位移雜訊抑制演算法乃被提出，其係利用一控制電路實現，包括以下步驟：依一觸控顯示面板之一線位移週期、一目前線位移索引值、一觸控驅動列數及一觸控感測接收行數決定一觸控偵測點陣列中的複數個目前雜訊點位置；依該觸控偵測點陣列的至少一次掃描偵測程序所產生的至少一個初始偵測資料陣列決定與所述複數個目前雜訊點位置對應的複數個雜訊參考資料，並將所述複數個雜訊參考資料儲存在一記憶區塊中；以及依所述複數個雜訊參考資料對該觸控偵測點陣列的下一次所述掃描偵測程序所產生的一下一次偵測資料陣列進行一補償運算，以消除該觸控偵測點陣列的雜訊。 In order to achieve the aforementioned purpose, a linear displacement noise suppression algorithm for a touch and display drive integration system is proposed, which is implemented using a control circuit and includes the following steps: according to a linear displacement period of a touch display panel, a current line The displacement index value, the number of touch-driven rows and the number of touch-sensing reception rows determine the plurality of current noise point positions in a touch detection point array; at least one scan detection is performed on the touch detection point array. At least one initial detection data array generated by the measurement process determines a plurality of noise reference data corresponding to the plurality of current noise point positions, and stores the plurality of noise reference data in a memory block; And performing a compensation operation on the next detection data array generated by the next scan detection procedure of the touch detection point array according to the plurality of noise reference data to eliminate the touch detection point array Noise.
在一實施例中，該補償運算係包括以下步驟：依各所述雜訊參考資料對所述下一次偵測資料陣列中與其對應的一偵測結果資料進行一減法運算。 In one embodiment, the compensation operation includes the following steps: performing a subtraction operation on a detection result data corresponding to the next detection data array according to each of the noise reference data.
在一實施例中，所述複數個雜訊參考資料係依至少二個所述初始偵測資料陣列的一統計結果決定。 In one embodiment, the plurality of noise reference data are determined based on a statistical result of at least two of the initial detection data arrays.
在一實施例中，該記憶區塊包含一暫存器、一快取記憶體或一隨機存取記憶體。 In one embodiment, the memory block includes a register, a cache memory, or a random access memory.
在一實施例中，該觸控顯示面板係由一光學式觸控顯示面板、一電阻式觸控顯示面板、一電磁式觸控顯示面板、一聲波式觸控顯示面板和一電容式觸控顯示面板所組成群組所選擇的一種觸控顯示面板。 In one embodiment, the touch display panel comprises an optical touch display panel, a resistive touch display panel, an electromagnetic touch display panel, an acoustic wave touch display panel, and a capacitive touch panel. A touch display panel selected by a group of display panels.
在一實施例中，一種觸控顯示面板乃被提出，其係採用如所述之觸控與顯示驅動整合系統線位移雜訊抑制演算法實現一觸控顯示功能。 In one embodiment, a touch display panel is proposed, which implements a touch display function using the linear displacement noise suppression algorithm of the touch and display drive integration system as described above.
為使 貴審查委員能進一步瞭解本發明之結構、特徵及其目的，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 reviewers to further understand the structure, characteristics, and purpose of the present invention, drawings and detailed descriptions of the preferred embodiments are attached below.
步驟a‧‧‧依一觸控顯示面板之一線位移週期、一目前線位移索引值、一觸控驅動列數及一觸控感測接收行數決定一觸控偵測點陣列中的複數個目前雜訊點位置 Step a‧‧‧ determines a plurality of touch detection point arrays according to a linear displacement cycle of a touch display panel, a current linear displacement index value, a touch driving column number and a touch sensing receiving line number Current noise point location
步驟b‧‧‧依該觸控偵測點陣列的至少一次掃描偵測程序所產生的至少一個初始偵測資料陣列決定與所述複數個目前雜訊點位置對應的複數個雜訊參考資料，並將所述複數個雜訊參考資料儲存在一記憶區塊中 Step b‧‧‧ determines a plurality of noise reference data corresponding to the plurality of current noise point positions according to at least one initial detection data array generated by at least one scanning detection process of the touch detection point array, And storing the plurality of noise reference data in a memory block
步驟c‧‧‧依所述複數個雜訊參考資料對該觸控偵測點陣列的下一次所述掃描偵測程序所產生的一下一次偵測資料陣列進行一補償運算，以消除該觸控偵測點陣列的雜訊 Step c‧‧‧ performs a compensation operation on the next detection data array generated by the next scan detection procedure of the touch detection point array according to the plurality of noise reference data to eliminate the touch Noise detection point array
圖1繪示本發明之觸控與顯示驅動整合系統線位移雜訊抑制演算法之一實施例步驟流程圖。 FIG. 1 is a flowchart of steps in an embodiment of a linear displacement noise suppression algorithm for a touch and display drive integration system of the present invention.
請參照圖1，其繪示本發明之觸控與顯示驅動整合系統線位移雜訊抑制演算法之一實施例步驟流程圖。 Please refer to FIG. 1, which illustrates a flowchart of steps in an embodiment of a linear displacement noise suppression algorithm for a touch and display driving integrated system of the present invention.
如圖所示，本發明之觸控與顯示驅動整合系統線位移雜訊抑制演算法，其包括以下步驟：依一觸控顯示面板之一線位移週期、一目前線位移索引值、一觸控驅動列數及一觸控感測接收行數決定一觸控偵測點陣列中的複數個目前雜訊點位置；(步驟a)；依該觸控偵測點陣列的至少一次掃描偵測程序所產生的至少一個初始偵測資料陣列決定與所述複數個目前雜訊點位置對應的複數個雜訊參考資料，並將所述複數個雜訊參考資料儲存在一記憶區塊中；(步驟b)；以及依所述複數個雜訊參考資料對該觸控偵測點陣列的下一次所述掃描偵測程序所產生的一下一次偵測資料陣列進行一補償運算，以消除該觸控偵測點陣列的雜訊；(步驟c)。 As shown in the figure, the linear displacement noise suppression algorithm of the touch and display drive integration system of the present invention includes the following steps: according to a linear displacement period of a touch display panel, a current linear displacement index value, and a touch drive The number of rows and the number of touch-sensing received rows determine the position of a plurality of current noise points in a touch detection point array; (step a); according to at least one scan detection procedure of the touch detection point array The generated at least one initial detection data array determines a plurality of noise reference data corresponding to the plurality of current noise point positions, and stores the plurality of noise reference data in a memory block; (step b) ); And performing a compensation operation on the next detection data array generated by the next scan detection procedure of the touch detection point array according to the plurality of noise reference data to eliminate the touch detection Noise of point array; (step c).
請參照表1，其繪示在線位移週期為16，且觸控掃描期間的總數為20的掃描偵測程序中所產生的一個初始偵測資料陣列，其中目前雜訊點為表1中「121」、「321」、「521」、「721」、「921」、「1041」及「1121」之位置，以粗體網底表示。 Please refer to Table 1, which shows an initial detection data array generated in the scanning detection process with a line displacement period of 16 and a total number of 20 during the touch scanning period. The current noise point is "121 in Table 1" "", "321", "521", "721", "921", "1041", and "1121" are shown in bold mesh.
表1
另外，請參照表2及表3，其標示在各特定的觸控掃描期間，一觸控點陣列所產生的雜訊點位置及雜訊資料，其中，表2中的各水平排列的雜訊資料均對應至一列，各垂直排列的雜訊資料均對應至一行。 In addition, please refer to Tables 2 and 3, which indicate the noise point positions and noise data generated by a touch point array during each specific touch scan. Among them, each horizontally arranged noise in Table 2 The data corresponds to one row, and each vertically arranged noise data corresponds to one row.
如表2及表3所示，當觸控掃描期間數為3時，目前雜訊點之位置出現在(第3列，第3行)、(第3列，第12行)、(第4列，第3行)及(第4列，第12行)，且其所對應的雜訊參考資料分別為36、31、35及31；當觸控掃描期間數為6時，目前雜訊點之位置出現在(第8列，第6行)、(第8列，第15行)、(第9列，第6行)及(第9列，第15行)，且其所對應的雜訊參考資料分別為39、40、37及42；當觸控掃描期間數為9時，目前雜訊點之位置出現在(第13列，第9行)、(第13 列，第18行)、(第14列，第9行)及(第14列，第18行)，且其所對應的雜訊參考資料分別為39、46、40及45；當觸控掃描期間數為12時，目前雜訊點之位置出現在(第18列，第2行)、(第18列，第11行)、(第19列，第2行)及(第19列，第11行)，且其所對應的雜訊參考資料分別為46、44、49及49；當觸控掃描期間數為15時，目前雜訊點之位置出現在(第23列，第5行)、(第23列，第14行)、(第24列，第5行)及(第24列，第14行)，且其所對應的雜訊參考資料分別為39、42、42及39；當觸控掃描期間數為17時，目前雜訊點之位置出現在(第26列，第7行)、(第26列，第16行)、(第27列，第7行)及(第27列，第16行)，且其所對應的雜訊參考資料分別為33、36、30及32；當觸控掃描期間數為18時，目前雜訊點之位置出現在(第28列，第8行)、(第28列，第17行)、(第29列，第8行)及(第29列，第17行)，且其所對應的雜訊參考資料分別為35、39、32及31。 As shown in Tables 2 and 3, when the number of touch scan periods is 3, the position of the current noise point appears in (3rd row, 3rd row), (3rd row, 12th row), (4th row) (Column, row 3) and (column 4, row 12), and their corresponding noise reference materials are 36, 31, 35, and 31 respectively; when the number of touch scan periods is 6, the current noise point Position appears in (Column 8, Row 6), (Column 8, Row 15), (Column 9, Row 6) and (Column 9, Row 15), and their corresponding miscellaneous The reference information is 39, 40, 37, and 42 respectively. When the number of touch scan periods is 9, the current noise point position appears in (13th row, 9th row), (13th row). (Column, line 18), (column 14, line 9), and (column 14, line 18), and the corresponding noise reference materials are 39, 46, 40, and 45 respectively; when touch scan At 12 o'clock, the location of the current noise point appears in (Column 18, Line 2), (Column 18, Line 11), (Column 19, Line 2), and (Column 19, Line 2) 11 lines), and the corresponding noise reference materials are 46, 44, 49, and 49 respectively; when the number of touch scan periods is 15, the position of the current noise point appears at (column 23, line 5) , (Column 23, line 14), (column 24, line 5), and (column 24, line 14), and the corresponding noise reference materials are 39, 42, 42, and 39, respectively; When the number of touch scan periods is 17, the location of the current noise point appears in (Column 26, Line 7), (Column 26, Line 16), (Column 27, Line 7), and (Number 27 columns, line 16), and the corresponding noise reference materials are 33, 36, 30, and 32 respectively; when the number of touch scan periods is 18, the current position of the noise point appears at (column 28, Line 8), (Column 28, Line 17), (Column 29, Line 8), and (Column 29, Line 17), and the corresponding noise parameters The test materials are 35, 39, 32 and 31, respectively.
依上述的掃描結果，即可產生一初始偵測資料陣列，並依所述初始偵測資料陣列決定與該觸控偵測點陣列的複數個目前雜訊點位置對應的複數個雜訊參考資料，以及將所述複數個雜訊參考資料儲存在一記憶區塊中。另外，所述複數個雜訊參考資料亦可依二個以上的所述初始偵測資料陣列的一統計結果決定。例如，所述複數個雜訊參考資料亦可依二個以上的所述初始偵測資料陣列的一加權平均值決定。 According to the scanning result described above, an initial detection data array can be generated, and a plurality of noise reference data corresponding to the plurality of current noise point positions of the touch detection point array are determined according to the initial detection data array. , And storing the plurality of noise reference data in a memory block. In addition, the plurality of noise reference data may also be determined based on a statistical result of the two or more initial detection data arrays. For example, the plurality of noise reference materials may also be determined based on a weighted average of two or more of the initial detection data arrays.
另外，該補償運算係依各所述雜訊參考資料對下一次偵測資料陣列中與其對應的一偵測結果資料進行一減法運算，以消除該觸控偵測點陣列的雜訊。 In addition, the compensation operation performs a subtraction operation on a corresponding detection result data in the next detection data array according to each of the noise reference data to eliminate the noise of the touch detection point array.
另外，該記憶區塊可包含一暫存器、一快取記憶體或一隨機存取記憶體；該觸控顯示面板可為由一光學式觸控顯示面板、一電阻式觸控顯示面板、一電磁式觸控顯示面板、一聲波式觸控顯示面板和一電容式觸控顯示面板所組成群組所選擇的一種觸控顯示面板。由於該些觸控顯示面板均為習知技術，故在此不擬贅述。 In addition, the memory block may include a register, a cache memory, or a random access memory; the touch display panel may be an optical touch display panel, a resistive touch display panel, A touch display panel selected by a group consisting of an electromagnetic touch display panel, an acoustic wave touch display panel, and a capacitive touch display panel. Since these touch display panels are all known technologies, they are not described in detail here.
另外，依上述的說明，本發明進一步揭示一觸控顯示面板，其係其採用上述之觸控與顯示驅動整合系統線位移雜訊抑制演算法實現一觸控顯示功能。 In addition, according to the above description, the present invention further discloses a touch display panel, which implements a touch display function by using the above-mentioned touch and display drive integration system linear displacement noise suppression algorithm.
藉由前述所揭露的設計，本發明乃具有以下的優點： With the design disclosed above, the present invention has the following advantages:
1.本發明的觸控與顯示驅動整合系統線位移雜訊抑制演算法係在不須增加硬體成本的前提下，藉由軟體演算方式決定出一觸控偵測點陣列中的複數個目前雜訊點位置。 1. The linear displacement noise suppression algorithm of the touch and display driving integration system of the present invention is to determine a plurality of current touch detection point arrays through a software calculation method without increasing hardware costs. Noise point location.
2.本發明的觸控與顯示驅動整合系統線位移雜訊抑制演算法能藉由觸控偵測點陣列的參考雜訊資料進行一補償運算以消除斜線雜訊，從而提高SNR(signal-to-noise ratio；訊號雜訊比)及改善觸控靈敏度。 2. The linear displacement noise suppression algorithm of the touch and display driving integration system of the present invention can perform a compensation operation by using the reference noise data of the touch detection point array to eliminate diagonal noise, thereby improving the SNR (signal-to -noise ratio; and improve touch sensitivity.
本案所揭示者，乃較佳實施例，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。 What is disclosed in this case is a preferred embodiment. For example, those who have partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those skilled in the art, do not depart from the scope of patent rights in this case.
綜上所陳，本案無論就目的、手段與功效，在在顯示其迥異於習知之技術特徵，且其首先發明合於實用，亦在在符合發明之專利要件，懇請 貴審查委員明察，並祈早日賜予專利，俾嘉惠社會，實感德便。 To sum up, regardless of the purpose, method and effect, this case is showing its technical characteristics that are quite different from the conventional ones, and its first invention is practical, and it is also in line with the patent requirements of the invention. Granting patents at an early date will benefit society and feel good.
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| US20130106779A1 (en) * | 2011-10-31 | 2013-05-02 | Analog Devices, Inc. | Noise compensation techniques for capacitive touch screen systems |
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