TWI490764B - Hybrid capacitive scan method - Google Patents
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本發明係為一種電容式觸控面板的掃描方法，尤指一種混合式電容觸控掃描方法。The invention relates to a scanning method of a capacitive touch panel, in particular to a hybrid capacitive touch scanning method.
目前電容式觸控掃描方法概分為二種：自感電容掃描法及互感電容掃描法以及自感加互感掃描法。At present, capacitive touch scanning methods are generally divided into two types: self-inductive capacitance scanning method and mutual inductance capacitance scanning method, and self-inductance plus mutual inductance scanning method.
自感電容掃描法係較早開發的電容式觸控掃描方法，其優點是訊噪比(SNR)佳，但用於多物件識別應用時，卻有鬼影現象造成多物件誤判之缺點；是故針對鬼影現象即開發出互感電容掃描法，而此一掃描方法係採用全點掃描，故可消除無鬼影現象，令電容式觸控面板真正實現多指觸控功能，但相對地互感電容掃描法的缺點則是訊噪比較自感電容掃描法差。Self-inductive capacitance scanning method is an early development of capacitive touch scanning method, which has the advantage of good signal-to-noise ratio (SNR), but when used in multi-object recognition applications, it has the disadvantage of ghosting causing misjudgment of multiple objects; Therefore, the mutual inductance capacitance scanning method is developed for the ghost phenomenon, and this scanning method uses full-point scanning, so that the ghost-free phenomenon can be eliminated, and the capacitive touch panel truly realizes the multi-finger touch function, but the relative mutual inductance The disadvantage of the capacitance scanning method is that the noise is compared with the self-inductance capacitance scanning method.
由於多指觸控已然為電容式觸控面板的基本功能，而且亦廣泛地應用於各種電子產品上，特別是手持式電子產品，正因為電子產品使用環境變複雜，使得電容觸控掃描的干擾雜訊種類變多，例如AC訊號及如水滴等液體等造成的雜訊，造成互容式掃描方法在受到該等雜訊干擾時，造成多物件識別誤判的問題，有必要進一步改良之。Since multi-finger touch is already a basic function of capacitive touch panels, and is also widely used in various electronic products, especially handheld electronic products, the interference of capacitive touch scanning is caused by the complicated use environment of electronic products. There are many types of noise, such as AC signals and noise caused by liquids such as water droplets, which cause the mutual-capacity scanning method to cause misidentification of multi-object identification when it is interfered by such noise, and it is necessary to further improve it.
有鑑於上述目前電容觸控掃描方法易受雜訊 干擾的缺點，本發明主要目的係提供一種混合式電容觸控掃描方法，以解決掃描時受雜訊干擾的誤判問題。In view of the above, the current capacitive touch scanning method is susceptible to noise Disadvantages of the present invention, the main object of the present invention is to provide a hybrid capacitive touch scanning method to solve the problem of misjudgment caused by noise interference during scanning.
欲達上述目的所使用的主要技術手段係令該混合式電容觸控掃描方法包含有：以單端輸入接地掃描方式掃描觸控面板後，獲得一第一感應資訊；以單端輸入同相掃描方式掃描觸控面板後，獲得一第二感應資訊；以雙端輸入差動掃描方式掃描觸控面板後，獲得一第三感應資訊；比較該第一及第二感應資訊後，判斷該觸控面板上是否有液體存在；若有，則選擇該第二感應資訊作為一輸出圖框；若無，則選擇該第三感應資訊作為一輸出圖框。The main technical means for achieving the above purpose is to enable the hybrid capacitive touch scanning method to: obtain a first sensing information after scanning the touch panel by a single-ended input ground scanning method; and input the in-phase scanning mode by single-ended input After scanning the touch panel, obtaining a second sensing information; after scanning the touch panel by the double-ended input differential scanning method, obtaining a third sensing information; comparing the first and second sensing information, determining the touch panel Whether there is liquid present; if so, the second sensing information is selected as an output frame; if not, the third sensing information is selected as an output frame.
上述本發明主要以會感應液體的單端輸入接地掃描方式與以不會感應液體的單端輸入同相掃描方式分別進行掃描，倘若目前電容式觸控面板上已有液體存在，則可比較第一感應資訊及第二感應資訊差異後，確認有液體存在，則輸出該第二感應資訊作為後續物件識別用的輸出圖框；若未有液體存在，則選擇輸出具有抗AC雜訊的第三感應資訊；如此，即可以輸出包含有較少雜訊感應量的輸出圖框，以進行後續物件座標識別用，降低識別誤判率。The above-mentioned invention mainly scans the single-ended input ground scanning method for sensing liquid and the single-phase input in-phase scanning method for not sensing liquid, and if the liquid existing on the capacitive touch panel exists, the first comparison can be made. After the difference between the sensing information and the second sensing information, it is confirmed that the liquid exists, and the second sensing information is output as an output frame for subsequent object recognition; if no liquid exists, the third sensing having the anti-AC noise is selected and outputted. Information; in this way, the output frame containing less noise induction can be output for subsequent object coordinate recognition, which reduces the recognition false positive rate.
本發明另一技術手段係令上述混合式電容觸控掃描方法包含有： 以單端輸入接地掃描方式掃描觸控面板後，獲得一第一感應資訊；以單端輸入同相掃描方式掃描觸控面板後，獲得一第二感應資訊；以雙端輸入差動掃描方式掃描觸控面板後，獲得一第三感應資訊；比較該第一及第三感應資訊後，判斷該觸控面板上是否有雜訊存在；若有，則選擇該第三感應資訊作為一輸出圖框；若無，則選擇該第二感應資訊作為一輸出圖框。Another technical means of the present invention is to enable the hybrid capacitive touch scanning method to include: After the touch panel is scanned by the single-ended input ground scanning mode, a first sensing information is obtained; after the single-ended input in-phase scanning mode is scanned, the second sensing information is obtained; and the double-side input differential scanning mode is used to scan the touch panel. After the control panel, obtaining a third sensing information; comparing the first and third sensing information, determining whether there is noise in the touch panel; if yes, selecting the third sensing information as an output frame; If not, the second sensing information is selected as an output frame.
上述本發明主要以會感應AC雜訊的單端輸入接地掃描方式與以不會感應AC雜訊的雙端輸入差動掃描方式分別進行掃描，倘若目前電容式觸控面板上處理AC雜訊環境下，則可比較第一感應資訊及第三感應資訊差異後，確認已有AC雜訊存在，則選擇該第三感應資訊作為後續物件識別用的輸出圖框；若未有AC雜訊存在，則選擇輸出不會感應液體的第三感應資訊；如此，即可以輸出包含有較少雜訊感應量的感應資訊進行物件座標識別用，降低識別誤判率。The above-mentioned invention mainly scans the single-ended input ground scanning method for sensing AC noise and the double-ended input differential scanning method for not sensing AC noise, respectively, if the current capacitive touch panel processes the AC noise environment. Then, after comparing the difference between the first sensing information and the third sensing information, confirming that the existing AC noise exists, selecting the third sensing information as an output frame for subsequent object recognition; if no AC noise exists, Then, the third sensing information that does not sense the liquid is selected; thus, the sensing information including the less noise sensing amount can be output for object coordinate recognition, thereby reducing the recognition false positive rate.
本發明又一技術手段係令上述混合式電容觸控掃描方法包含有：以單端輸入同相掃描方式掃描觸控面板後，獲得一第二感應資訊；以雙端輸入差動掃描方式掃描觸控面板後，獲得一第三感應資訊； 比較該第二及第三感應資訊後，判斷該觸控面板上是否有非觸控物件存在；若有，則選擇該第二及第三感應資訊之其中一感應資訊作為一輸出圖框。According to still another aspect of the present invention, the hybrid capacitive touch scanning method includes: scanning a touch panel with a single-ended input in-phase scanning manner to obtain a second sensing information; and scanning the touch with a double-ended input differential scanning method. After the panel, obtaining a third sensing information; After comparing the second and third sensing information, determining whether there is a non-touch object on the touch panel; if yes, selecting one of the second and third sensing information as an output frame.
由於單端輸入同相掃描方式進行掃描時會受到AC雜訊干擾，但因不會感應液體而具有防水特性，而雙端輸入差動掃描方式進行掃描則恰與單端輸入同相掃描方式具有相反特性，故針對分別存在有液體或AC雜訊的使用環境，本發明可藉由比較第二及第三感應資訊之間差異而判斷目前存在液體或AC雜訊，而選擇其中較佳的感應資訊作為輸出圖框。Since the single-ended input is scanned by the in-phase scanning mode, it is subject to AC noise interference, but it is waterproof because it does not sense liquid. The double-ended input differential scanning mode scans exactly the opposite of the single-ended input in-phase scanning mode. Therefore, the present invention can determine the presence of liquid or AC noise by comparing the difference between the second and third sensing information for the use environment in which liquid or AC noise exists respectively, and select the better sensing information as the difference. Output frame.
本發明再一技術手段係令上述混合式電容觸控掃描方法包含有：以單端輸入接地掃描方式掃描觸控面板後，獲得一第一感應資訊；以單端輸入同相掃描方式掃描觸控面板後，獲得一第二感應資訊；以雙端輸入差動掃描方式掃描觸控面板後，獲得一第三感應資訊；比較該第一及第二感應資訊後，判斷該觸控面板上是否有液體存在；及若有，經由該第一及第二感應資訊確認該觸控面板上液體所在的區域，以第二感應資訊對應該區域的感應數值作為一輸出圖框中對應該區域的感應數值，並以第三感應資訊對應該區域以外之其餘區域的感應數值作為該輸出圖 框中對應該其餘區域的感應數值；及若無，則選擇該第三感應資訊作為一輸出圖框。According to still another aspect of the present invention, the hybrid capacitive touch scanning method includes: scanning a touch panel with a single-ended input ground scanning method to obtain a first sensing information; and scanning the touch panel with a single-ended input in-phase scanning manner After obtaining the second sensing information, the third sensing information is obtained after scanning the touch panel by the double-ended input differential scanning method; after comparing the first and second sensing information, determining whether the touch panel has liquid Existing; and if so, confirming, by the first and second sensing information, an area where the liquid on the touch panel is located, and sensing the value corresponding to the second sensing information as an inductive value corresponding to the area in the output frame, And using the sensing value of the third sensing information corresponding to the rest of the area as the output image The box corresponds to the sensing value of the remaining area; and if not, the third sensing information is selected as an output frame.
上述本發明同樣先以單端輸入接地掃描方式及單端輸入同相掃描方式分別進行掃描後比較差異，以確認有液體存在，則一併判斷液體位置，以第二感應資訊作為一輸出圖框中該區域所對應的感應數值，並以第三感應資訊作為該輸出圖框中該區域以外之其餘區域所對應的感應數值；如此輸出圖框即整合有防水特性及抗AC雜訊特性。The above invention also firstly compares the difference between the single-ended input ground scanning mode and the single-ended input in-phase scanning mode to confirm that there is liquid, and then determines the liquid position together, and uses the second sensing information as an output frame. The sensing value corresponding to the area, and the third sensing information is used as the sensing value corresponding to the remaining area outside the area in the output frame; the output frame is integrated with waterproof characteristics and anti-AC noise characteristics.
本發明又一技術手段係令上述混合式電容觸控掃描方法包含有：以單端輸入同相掃描方式掃描觸控面板後，獲得一第二感應資訊；以雙端輸入差動掃描方式掃描觸控面板後，獲得一第三感應資訊；比較該第二及第三感應資訊後，判斷該觸控面板上是否有液體存在；及若有，經由該第二及第三感應資訊確認該觸控面板上液體所在的區域，以第二感應資訊對應該區域的感應數值作為一輸出圖框中對應該區域的感應數值，並以第三感應資訊對應該區域以外之其餘區域的感應數值作為該輸出圖框中對應該其餘區域的感應數值；若無，則選擇該第三感應資訊作為一輸出圖框。According to still another aspect of the present invention, the hybrid capacitive touch scanning method includes: scanning a touch panel with a single-ended input in-phase scanning manner to obtain a second sensing information; and scanning the touch with a double-ended input differential scanning method. After the panel, a third sensing information is obtained; after comparing the second and third sensing information, determining whether the liquid is present on the touch panel; and if so, confirming the touch panel via the second and third sensing information In the area where the liquid is located, the sensing value corresponding to the second sensing information is used as the sensing value of the corresponding area in the output frame, and the sensing value of the remaining area corresponding to the third sensing information is used as the output image. The box corresponds to the sensing value of the remaining area; if not, the third sensing information is selected as an output frame.
上述本發明同樣先以單端輸入同相掃描方式及雙端輸入差動掃描方式分別進行掃描後比較差異，以確 認有液體存在，則一併判斷液體位置，以第二感應資訊作為一輸出圖框中該區域所對應的感應數值，並以第三感應資訊作為該輸出圖框中該區域以外之其餘區域所對應的感應數值；如此輸出圖框即整合有防水特性及抗AC雜訊特性。The above invention also first compares the difference between the single-ended input in-phase scanning mode and the double-ended input differential scanning mode, so as to confirm When the liquid is recognized, the liquid position is determined together, and the second sensing information is used as the sensing value corresponding to the area in the output frame, and the third sensing information is used as the rest area outside the area in the output frame. The corresponding sensing value; the output frame is integrated with waterproof characteristics and anti-AC noise characteristics.
10‧‧‧觸控面板10‧‧‧Touch panel
20‧‧‧控制器20‧‧‧ Controller
圖1：係本發明採用單端輸入接地掃描方式之示意圖。Figure 1 is a schematic diagram of a single-ended input ground scan mode of the present invention.
圖2：係本發明採用單端輸入同相掃描方式之示意圖。Figure 2 is a schematic diagram of the present invention employing a single-ended input in-phase scanning mode.
圖3：係本發明採用雙端輸入差動掃描方式之示意圖。Figure 3 is a schematic diagram of the present invention using a double-ended input differential scanning mode.
圖4：係本發明混合式電容觸控掃描方法的第一較佳實施例流程圖。4 is a flow chart of a first preferred embodiment of the hybrid capacitive touch scanning method of the present invention.
圖5A：係於觸控面板上有液體環境下執行圖1及圖2的感應訊號示意圖。FIG. 5A is a schematic diagram of performing the sensing signals of FIGS. 1 and 2 in a liquid environment on a touch panel.
圖5B：係於觸控面板上有液體環境下執行圖3的感應訊號示意圖。FIG. 5B is a schematic diagram of performing the sensing signal of FIG. 3 in a liquid environment on the touch panel.
圖6：係本發明混合式電容觸控掃描方法的第二較佳實施例流程圖。6 is a flow chart showing a second preferred embodiment of the hybrid capacitive touch scanning method of the present invention.
圖7A：係於觸控面板於AC雜訊環境下執行圖1及圖2的感應訊號示意圖。FIG. 7A is a schematic diagram of performing the sensing signals of FIG. 1 and FIG. 2 in an AC noise environment of the touch panel.
圖7B：係於觸控面板上有液體環境下執行圖3的感應訊號示意圖。FIG. 7B is a schematic diagram of performing the sensing signal of FIG. 3 in a liquid environment on the touch panel.
圖8：係本發明混合式電容觸控掃描方法的第三較佳實施例流程圖。Figure 8 is a flow chart showing a third preferred embodiment of the hybrid capacitive touch scanning method of the present invention.
圖9：係本發明混合式電容觸控掃描方法的第四較佳實 施例流程圖。FIG. 9 is a fourth preferred embodiment of the hybrid capacitive touch scanning method of the present invention Example flow chart.
圖10：係本發明混合式電容觸控掃描方法的第五較佳實施例流程圖。Figure 10 is a flow chart showing a fifth preferred embodiment of the hybrid capacitive touch scanning method of the present invention.
圖11A：係於觸控面板於液體及AC雜訊環境下執行圖3的感應訊號示意圖。FIG. 11A is a schematic diagram of performing the sensing signal of FIG. 3 in a liquid and AC noise environment of the touch panel.
圖11B：係於觸控面板上有液體及AC雜訊環境下執行圖2的感應訊號示意圖。FIG. 11B is a schematic diagram of performing the sensing signal of FIG. 2 in a liquid and AC noise environment on the touch panel.
圖11C：係於觸控面板上有液體及AC雜訊環境下執行圖9或圖10的感應訊號示意圖。FIG. 11C is a schematic diagram of performing the sensing signal of FIG. 9 or FIG. 10 in a liquid and AC noise environment on the touch panel.
針對目前電容式觸控掃描方法易受到使用環境雜訊干擾，造成掃描後的感應資訊進行物件座標識別時的誤判，本發明提出以下幾種混合式電容觸控掃描方法，其中主要採用具有防水特性的單端輸入同相掃描方式以及具有抗AC雜訊特性的雙端輸入差動掃描方式進行非觸控物件的識別及排除，亦可進一步配合不具防水特性亦不具有抗AC雜訊特性的單端輸入接地掃描方式，進行識別非觸控物件。In view of the fact that the current capacitive touch scanning method is susceptible to noise interference in the use environment, and the sensing information after scanning is used to identify the object coordinates, the present invention proposes the following hybrid capacitive touch scanning methods, which mainly adopt waterproof characteristics. The single-ended input in-phase scanning mode and the double-ended input differential scanning mode with anti-AC noise characteristics can identify and eliminate non-touch objects, and can further cooperate with single-ended devices that are not waterproof or have anti-AC noise characteristics. Enter the ground scan mode to identify non-touch objects.
首先請參閱圖1所示，一電容式觸控面板10的第一軸X及第二軸Y係分別包含複數感應線X1~Xn、Y1~Ym，並與一控制器20連接，其中該控制器係執行上述單端輸入接地掃描方式，其係為一自容式掃描方法，即依序對各條感應線X1~Xn、Y1~Ym輸出一刺激訊號，當對目前感應線X1輸出一刺激訊號時，令其它感應線X2~Xn、Y1~Ym接地，接著接收此一感應線X1的感應訊號。如此 重覆掃描直到所有第一及第二軸感應線均取得感應訊號，即可輸出一組感應資訊；此外，亦可重覆上述掃描過程，令各條感應線X1~Xn、Y1~Ym獲得多數次感應訊號，再取其平均感應量，再以平均感應量輸出一組感應資訊。Referring to FIG. 1 , the first axis X and the second axis Y of the capacitive touch panel 10 respectively include a plurality of sensing lines X1 X Xn , Y1 Y Ym and are connected to a controller 20 , wherein the control is performed. The device performs the above-mentioned single-ended input grounding scanning mode, which is a self-contained scanning method, that is, sequentially outputs a stimulation signal to each sensing line X1~Xn, Y1~Ym, and outputs a stimulus to the current sensing line X1. During the signal, the other sensing lines X2~Xn, Y1~Ym are grounded, and then the sensing signal of the sensing line X1 is received. in this way Repeat the scan until all the first and second axis sensing lines have obtained the sensing signal, and then output a set of sensing information. In addition, the scanning process can be repeated to make the sensing lines X1~Xn and Y1~Ym obtain the majority. The secondary sensing signal, and then taking the average sensing amount, and then outputting a set of sensing information by the average sensing amount.
再請參閱圖2所示，上述單端輸入同相掃描方式亦為一自容式掃描方法，同時對各條感應線X1~Xn、Y1~Ym輸出刺激訊號，接著依序接收各感應線X1~Xn、Y1~Ym的感應訊號，直到所有感應線X1~Xn、Y1~Ym均取得感應訊號，即可輸出一組感應資訊。由於如水滴等液體出現在觸控面板上，且水滴位置對應其中數條相鄰感應線，則雖然各條感應線的電壓會因為水滴而有上升或下降變化，但同時對所有感應線輸出相同相位的刺激訊號，即可使得相鄰感應線之間的電位相同或相近，使得依序接收對應水滴位置的各條感應線的感應訊號，該感應訊號中不會包含有水滴感應量的變化；因此，單端輸入同相掃描方式輸出的感應資訊即能有效排除水滴等液體的干擾，而具有防水特性。Referring to FIG. 2, the single-ended input in-phase scanning mode is also a self-capacitance scanning method, and outputs stimulation signals to the sensing lines X1~Xn and Y1~Ym, and then sequentially receives the sensing lines X1~. The sensing signals of Xn and Y1~Ym can output a set of sensing information until all sensing lines X1~Xn and Y1~Ym obtain sensing signals. Since liquid such as water drops appears on the touch panel, and the position of the water drop corresponds to a plurality of adjacent sensing lines, although the voltage of each sensing line changes due to water droplets, the output is the same for all sensing lines. The phase stimulation signal can make the potentials between adjacent sensing lines the same or similar, so that the sensing signals of the sensing lines corresponding to the water drop position are sequentially received, and the sensing signal does not include the change of the water droplet sensing amount; Therefore, the sensing information outputted by the single-ended input in-phase scanning mode can effectively eliminate the interference of liquids such as water droplets, and has waterproof characteristics.
請參閱圖3所示，上述雙端輸入差動掃描方式亦為一自容式掃描方法，係依序對各條感應線輸出刺激訊號，並於輸出予目前感應線X1的刺激訊號的同時，亦與出一與目前感應線X1刺激訊號相位相反的刺激訊號至其相鄰下一條感應線X2，接著再接收目前感應線X1及其相鄰感應線X2的感應訊號加以運算，也就是說，當此二相鄰感應線同時受到AC雜訊干擾，接收此二相鄰感應線X1、X2的感應訊號，此二感應訊號會包含相近且相反的AC雜訊 感應量，經運算後，目前感應線X1獲得的感應量可依據另一相鄰感應線X2所獲得的感應量，將AC雜訊干擾的感應量予以排除，以獲得目前感應線X1的最後感應訊號；如此重覆掃描直到所有感應線X1~Xn、Y1~Ym均取得最後感應訊號，即可輸出一組感應資訊；是以，以雙端輸入差動掃描方式掃描完輸出的感應訊號即具有抗AC雜訊特性。Referring to FIG. 3, the double-ended input differential scanning method is also a self-capacitance scanning method, which sequentially outputs stimulation signals to the sensing lines and outputs the stimulation signals to the current sensing line X1. The stimuli signal opposite to the current sensing line X1 stimulating signal phase is sent to the adjacent next sensing line X2, and then the sensing signal of the current sensing line X1 and its adjacent sensing line X2 is received, that is, When the two adjacent sensing lines are simultaneously interfered by AC noise, receiving the sensing signals of the two adjacent sensing lines X1 and X2, the two sensing signals will contain similar and opposite AC noise. Inductive amount, after the operation, the sensing quantity obtained by the current sensing line X1 can be excluded according to the sensing quantity obtained by another adjacent sensing line X2, and the sensing amount of the AC noise interference is excluded to obtain the final sensing of the current sensing line X1. The signal is scanned repeatedly until all the sensing lines X1~Xn and Y1~Ym obtain the last sensing signal, and a set of sensing information can be output; that is, the sensing signal outputted by the double-ended input differential scanning method has Anti-AC noise characteristics.
以下再進一步就本發明使用上述單端輸入接地掃描方式、單端輸入同相掃描方式、雙端輸入差動掃描方式進行混合式電容觸控掃描方法的實施例進行說明，但不以此為限。In the following, the embodiment of the present invention uses the single-ended input ground scanning mode, the single-ended input in-phase scanning mode, and the double-ended input differential scanning mode to perform the hybrid capacitive touch scanning method, but is not limited thereto.
首先請參閱圖4所示，假設使用環境出現液體的非觸控物件且手指未觸碰於電容式觸控面板時，本發明的混合式電容觸控掃描方法係分別以單端輸入接地掃描方式、單端輸入同相掃描方式及雙端輸入差動掃描方式掃描觸控面板後，獲得一第一感應資訊、第二感應資訊及第三感應資訊S10，即如圖5A所示，其為該第一感應資訊及第三感應資訊中對應一感應線X1的感應訊號，此感應線X1與不同軸的六條感應線Y3~Y5、Y7~Y9相交位置感應有液體存在；再如圖5B所示，該第二感應資訊則因具有抗水性，故同一感應線X1與不同軸的六條感應線Y3~Y5、Y7~Y9交錯處上並未出現任何感應量；因此，比較第一及第二感應資訊中相同感應線的感應訊號差異，倘若差異存在，可再進一步判斷該差異是否超過一臨界值S11，即可於判斷超過臨界值時判斷該電容式觸控面板上有液體存在，並可進一步識別出液體的位置；由圖5A及圖5B相較 可知，在此以感應液體所在的感應量為正值為例，自第一感應資訊及第二感應資訊中取出相同感應線的感應訊號進行比對，由於第一感應資訊對應液體位置的感應線X1之感應訊號中，感應線X1與感應線Y3~Y5及Y7~Y9交錯處的感應量呈正值，而第二應資訊對應液體位置的感應線X1之感應訊號中，感應線X1與感應線Y3~Y5及Y7~Y9交錯處的感應量為零或接近零，故將第一感應資訊的感應線X1的感應訊號減去第二感應資訊的感應線X1，其與感應線Y3~Y5及Y7~Y9相交的感應量差值會為正差值且超過臨界值，則代表液體存在於該條感應線X1；故本發明會檢知目前電容式觸控面板上已有液體，而選擇具有防水特性的第二感應資訊作為輸出圖框S12；反之，若檢知電容式觸控面板上並未受到液體干擾，則選擇該第三感應資訊輸出作為輸出圖框S13；如此，即可以輸出包含有較少雜訊感應量的感應資訊進行物件座標識別用，降低識別誤判。First, referring to FIG. 4, the hybrid capacitive touch scanning method of the present invention uses a single-ended input grounding scanning method, respectively, when a liquid non-touch object appears in the environment and the finger does not touch the capacitive touch panel. After the single-ended input in-phase scanning mode and the double-ended input differential scanning mode scan the touch panel, a first sensing information, a second sensing information, and a third sensing information S10 are obtained, as shown in FIG. 5A, which is the first a sensing signal corresponding to a sensing line X1 in the sensing information and the third sensing information, wherein the sensing line X1 and the six sensing lines Y3~Y5 and Y7~Y9 of different axes sense a liquid presence; and as shown in FIG. 5B The second sensing information is water-resistant, so that the sensing line X1 and the six sensing lines Y3~Y5 and Y7~Y9 of different axes do not have any sensing amount; therefore, the first and second are compared. In the sensing information, the difference of the sensing signals of the same sensing line, if the difference exists, can further determine whether the difference exceeds a critical value S11, and can determine that there is liquid on the capacitive touch panel when the threshold value is exceeded, and The position of the liquid can be further identified; compared with Figure 5A and Figure 5B It can be seen that the positive sensing value of the sensing liquid is positive, and the sensing signals of the same sensing line are taken out from the first sensing information and the second sensing information for comparison, because the first sensing information corresponds to the sensing line of the liquid position. In the sensing signal of X1, the sensing quantity of the sensing line X1 and the sensing line Y3~Y5 and Y7~Y9 is positive, and the second information corresponds to the sensing signal of the liquid position sensing line X1, the sensing line X1 and the sensing The inductance of the line Y3~Y5 and Y7~Y9 is zero or close to zero, so the sensing signal of the sensing line X1 of the first sensing information is subtracted from the sensing line X1 of the second sensing information, and the sensing line Y3~Y5 The difference between the sensing quantity of the intersection of Y7 and Y9 is a positive value and exceeds the critical value, which means that the liquid exists in the sensing line X1; therefore, the present invention detects that there is liquid on the capacitive touch panel, and selects The second sensing information having the waterproof characteristic is used as the output frame S12; conversely, if it is detected that the capacitive touch panel is not subjected to liquid interference, the third sensing information output is selected as the output frame S13; thus, the output can be output Contains less noise Sensing the amount of information carried by the object coordinates identifying, reducing false identification.
至於針對抗AC雜訊的混合式電容觸控掃描方法的另一實施例則請參閱圖6所示，同樣先以單端輸入接地掃描方式、單端輸入同相掃描方式及雙端輸入差動掃描方式掃描觸控面板後，分別獲得一第一感應資訊、一第二感應資訊及一第三感應資訊S20；假設掃描時有手指放置於其中一軸的一條感應線X1及三條另一軸感應線Y3~Y5上並同時出現有AC雜訊，則如圖7A所示，係為此條感應線X1以單端輸入接地掃描方式及單端輸入同相掃描方式掃描後獲得的感應訊號，其與三條另一軸感應線Y3~Y5交錯處的感應量本應手指觸碰而呈現正感應量，但卻受到AC 雜訊影響而呈負感應量；再配合參閱圖7B所示，相同情況由雙端輸入差動掃描方式掃描後所獲得該感應線X1的感應訊號，由於雙端輸入差動掃描方式獲得的感應訊號具有抗AC雜訊特性，故掃描該感應線X1所獲得的感應訊號，仍能正確地反應出手指所在位置的正感應量。因此，由圖7A及圖7B相較可知，比較第一及第三感應資訊後S21，即能順利判斷出該觸控面板上是否有AC雜訊存在；若判斷結果為已有AC雜訊存在，則選擇該第三感應資訊作為輸出圖框S22；若判斷結果為未有AC雜訊存在則選擇該第二感應資訊作為輸出圖框S23；如此，即可以輸出包含有較少AC雜訊感應量的感應資訊進行物件座標識別用，降低識別誤判率。As another embodiment of the hybrid capacitive touch scanning method for anti-AC noise, please refer to FIG. 6 , which also adopts single-ended input ground scanning mode, single-ended input in-phase scanning mode and double-ended input differential scanning. After scanning the touch panel, a first sensing information, a second sensing information, and a third sensing information S20 are respectively obtained; assuming that a finger is placed on one of the axes of one sensing line X1 and three other axis sensing lines Y3~ On the Y5, AC noise appears at the same time. As shown in FIG. 7A, the sensing signal obtained by scanning the sensing line X1 with the single-ended input ground scanning mode and the single-ended input in-phase scanning mode is the same as the three other axes. The amount of induction at the intersection of the sensing lines Y3~Y5 should be positively induced by the finger touch, but it is AC. The noise is negatively affected. Referring to FIG. 7B, the same condition is obtained by the double-ended input differential scanning method, and the sensing signal of the sensing line X1 is obtained, and the sensing is obtained by the double-ended input differential scanning method. The signal has anti-AC noise characteristics, so the sensing signal obtained by scanning the sensing line X1 can still correctly reflect the positive sensing quantity of the finger position. Therefore, as can be seen from FIG. 7A and FIG. 7B, after comparing the first and third sensing information, S21 can successfully determine whether there is AC noise on the touch panel; if the result is that the existing AC noise exists. And selecting the third sensing information as the output frame S22; if the result of the determination is that no AC noise exists, selecting the second sensing information as the output frame S23; thus, the output may include less AC noise sensing The amount of sensing information is used for object coordinate recognition to reduce the recognition false positive rate.
綜合以上二個實施例可知，其中圖5A及圖5B亦可由第二及第三感應資訊判斷是否有液體存在，而圖7A及圖7B亦可由第二及第三感應資訊判斷是否有AC雜訊存在，因此本發明混合式電容觸控掃描方法的再一個較佳實施例如圖8所示，首先以單端輸入同相掃描方式及雙端輸入差動掃描方式掃描觸控面板後，分別獲得一第二感應資訊及一第三感應資訊S40，比較第二及第三感應資訊中相同感應線所對應的感應訊號，若二感應訊號之間已有差異，則代表該觸控面板上已有液體或AC雜訊等非觸控物件存在；若未有觸控物件存在，則選擇第三感應資訊作為輸出圖框S45。若有觸控物件存在，則判斷目前非觸控物件特性S42，即當比較第二及第三感應資訊中相同感應線所對應的感應訊號之間已有差異時，如圖5A及圖5B所 示，若第二感應資訊的感應線無感應量，而第三感應資訊的相同感應線有感應量，則上述非觸控物件特性屬於液體，則選擇輸出該第二感應資訊作為輸出圖框S43；若如圖7A及圖7B所示，若是第三感應資訊的感應線無感應量，而第二感應資訊的相同感應線有感應量而產生此一差異，則選擇輸出該第三感應資訊作為輸出圖框S44。如此本實施例係較前二實施例減少單端輸入接地掃描方式掃描程序，更為提升整體掃描效率。It can be seen from the above two embodiments that FIG. 5A and FIG. 5B can also determine whether liquid is present by the second and third sensing information, and FIG. 7A and FIG. 7B can also determine whether there is AC noise by the second and third sensing information. Therefore, another preferred embodiment of the hybrid capacitive touch scanning method of the present invention is as shown in FIG. 8. First, the touch panel is scanned by the single-ended input in-phase scanning mode and the double-ended input differential scanning mode, respectively. The second sensing information and the third sensing information S40 compare the sensing signals corresponding to the same sensing line in the second and third sensing information. If there is a difference between the two sensing signals, it means that the touch panel has liquid or A non-touch object such as AC noise exists; if no touch object exists, the third sensing information is selected as the output frame S45. If there is a touch object, the current non-touch object characteristic S42 is determined, that is, when there is a difference between the sensing signals corresponding to the same sensing line in the second and third sensing information, as shown in FIG. 5A and FIG. 5B. If the sensing line of the second sensing information has no sensing quantity, and the same sensing line of the third sensing information has a sensing quantity, if the non-touch object characteristic belongs to a liquid, then the second sensing information is selected and output as the output frame S43. As shown in FIG. 7A and FIG. 7B, if the sensing line of the third sensing information has no sensing quantity, and the same sensing line of the second sensing information has a sensing quantity to generate the difference, the third sensing information is selected and output as Output block S44. Therefore, in this embodiment, the single-ended input ground scan scanning program is reduced compared with the first embodiment, and the overall scanning efficiency is improved.
除此之外，請再參閱圖9所示，係為本發明混合式電容觸控掃描方法又一實施例，首先以單端輸入接地掃描方式、單端輸入同相掃描方式及雙端輸入差動掃描方式掃描觸控面板後，分別獲得一第一感應資訊、一第二感應資訊及一第三感應資訊S50，一樣將該第一感應資訊及第二感應資訊相互比較後S51，判斷該觸控面板上是否有液體存在，倘若有液體存在，則經由第一及第二感應資訊確認該觸控面板上液體所在的區域S52，再以第二感應資訊對應該區域的感應數值作為一輸出圖框中對應該區域的感應數值，並以第三感應資訊對應該區域以外之其餘區域的感應數值作為該輸出圖框中對應該其餘區域的感應數值S53；如此，即可確保輸出圖框不包含液體的感應量及AC雜訊的感應量，而兼具有防水及抗AC雜訊特性。其中較佳者，倘若判斷未有液體存在，則為避免受AC雜訊干擾，故亦選擇該第三感應資訊作為輸出圖框S54。In addition, please refer to FIG. 9 again, which is another embodiment of the hybrid capacitive touch scanning method of the present invention, first adopting single-ended input ground scanning mode, single-ended input in-phase scanning mode and double-ended input differential Scanning the touch panel to obtain a first sensing information, a second sensing information, and a third sensing information S50, respectively, and comparing the first sensing information and the second sensing information to each other, and then determining the touch. Whether there is liquid on the panel, if there is liquid, the area S52 where the liquid on the touch panel is located is confirmed through the first and second sensing information, and the sensing value corresponding to the second sensing information is used as an output frame. The sensing value corresponding to the area is corresponding to the sensing value of the remaining area corresponding to the area corresponding to the third sensing information as the sensing value S53 corresponding to the remaining area in the output frame; thus, the output frame can be ensured that the output frame does not contain liquid The amount of sensing and the amount of AC noise are both waterproof and anti-AC noise. Preferably, if it is determined that no liquid is present, the third sensing information is also selected as the output frame S54 in order to avoid interference from the AC noise.
此外，請再參閱圖10所示，為本發明混合式電容觸控掃描方法另一實施例，首先以單端輸入同相掃描 方式及雙端輸入差動掃描方式掃描觸控面板後，分別獲得一第二感應資訊及一第三感應資訊，一樣以第二及第三感應資訊比較後，判斷該觸控面板上是否有液體存在，倘若有液體存在，則經由第二及第三感應資訊確認該觸控面板上液體所在的區域S62，以第二感應資訊對應該區域的感應數值作為一輸出圖框中對應該區域的感應數值，並以第三感應資訊對應該區域以外之其餘區域的感應數值作為該輸出圖框中對應該其餘區域的感應數值S63；如此，即可確保輸出圖框不包含液體的感應量及AC雜訊的感應量，而兼具有防水及抗AC雜訊特性。其中較佳者，倘若判斷未有液體存在，則為避免受AC雜訊干擾，故亦選擇該第三感應資訊作為輸出圖框S64。In addition, please refer to FIG. 10 again, which is another embodiment of the hybrid capacitive touch scanning method of the present invention, first adopting single-ended input in-phase scanning. After the touch panel is scanned by the dual-ended input differential scanning method, a second sensing information and a third sensing information are respectively obtained, and after comparing the second and third sensing information, it is determined whether there is liquid on the touch panel. If there is a liquid, the area S62 where the liquid on the touch panel is located is confirmed by the second and third sensing information, and the sensing value corresponding to the second sensing information is used as the sensing area corresponding to the output frame. The value, and the sensing value of the remaining area other than the third sensing information is used as the sensing value S63 corresponding to the remaining area in the output frame; thus, it is ensured that the output frame does not contain the sensing amount of the liquid and the AC miscellaneous The amount of sensing is both waterproof and anti-AC noise. Preferably, if it is determined that no liquid is present, the third sensing information is also selected as the output frame S64 in order to avoid interference from the AC noise.
請參閱圖11A所示，即為觸控面板同時受到液體及AC雜訊干擾時，以雙端輸入差動掃描方式掃描其中一條感應線的感應訊號，其與另一軸交錯的複數感應線Y3~Y5及Y10~Y12位置即為液體感應訊號，而Y7~Y9則是手指受到AC雜訊干擾後的感應量，而圖11B則是以單端輸入同相掃描方式於同圖11A環境下進行掃描，因此該感應線與另一軸感應線Y7~Y9受到AC雜訊影響，而呈現負感應值；因此，由圖9及圖10的混合式觸控掃描方法掃描後，圖11A中的液體感應數值係以圖11B的感應數值取代，而保留原圖11A中其餘位置的感應數值，如圖11C所示，該感應線的感應訊號即兼具防水特性及抗AC雜訊特性。Please refer to FIG. 11A, that is, when the touch panel is interfered by liquid and AC noise at the same time, the sensing signal of one of the sensing lines is scanned by the double-ended input differential scanning method, and the complex sensing line Y3~ interleaved with the other axis. The Y5 and Y10~Y12 positions are the liquid sensing signals, while the Y7~Y9 is the sensing amount of the finger after being interfered by the AC noise, and the FIG. 11B is scanned by the single-ended input in-phase scanning mode in the same FIG. 11A environment. Therefore, the sensing line and the other sensing line Y7~Y9 are affected by the AC noise and exhibit a negative sensing value; therefore, after scanning by the hybrid touch scanning method of FIGS. 9 and 10, the liquid sensing numerical value in FIG. 11A The sensing value of FIG. 11B is substituted, and the sensing value of the remaining position in the original image 11A is retained. As shown in FIG. 11C, the sensing signal of the sensing line has both waterproof characteristics and anti-AC noise characteristics.
以上所述僅是本創作的較佳實施例而已，並非 對本創作做任何形式上之限制，雖然本創作已以較佳實施例揭露如上，然而並非用以限定本創作，任何所屬技術領域中具有通常知識者，在不脫離本創作技術方案的範圍內，當可利用上述揭示的技術內容做出些許更動或修飾為等同變化的等效實施例，但凡是未脫離本創作技術方案的內容，依據本創作的技術實質對以上實施例所作的任何簡單修改、等同變化與修飾，均仍屬於本創作技術方案的範圍內。The above description is only a preferred embodiment of the present creation, and is not The present invention is not limited to the scope of the present invention, and is not intended to limit the present invention, and is not limited to the scope of the present invention. Any equivalent modifications may be made to the above embodiments, and any simple modifications made to the above embodiments may be made in accordance with the technical essence of the present invention, without departing from the technical scope of the present disclosure. Equivalent changes and modifications are still within the scope of this creative technical solution.
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| TWI560597B (en) | 2015-05-29 | 2016-12-01 | Hon Hai Prec Ind Co Ltd | In-cell touch display panel |
| CN106293177B (en) * | 2015-05-29 | 2020-02-04 | 鸿富锦精密工业（深圳）有限公司 | Embedded touch display panel |
| CN110596761A (en) * | 2018-06-12 | 2019-12-20 | 义隆电子股份有限公司 | Liquid detection method and controller of capacitive touch panel |
| TWI710941B (en) * | 2019-11-29 | 2020-11-21 | 友達光電股份有限公司 | Touch display apparatus |
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