TW201546690A - Capacitive touch panel having approaching sensing function and scan method thereof - Google Patents
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本發明係一種電容式觸控面板的掃描方法，尤指一種具有接近感應功能之電容式觸控面板及其掃描方法。The invention relates to a scanning method of a capacitive touch panel, in particular to a capacitive touch panel with a proximity sensing function and a scanning method thereof.
現有技術的電容式觸控面板，係利用一導電或帶電的感應物件於該電容式觸控面板的觸控區域操作時，令觸控區域產生電容值的改變，藉以判斷該導電物件於該觸控面板的操作位置。而現有技術中另有一種電磁式觸控面板，該電磁式觸控面板需要搭配一電磁筆使用，並包含有複數感應線圈，且該複數感應線圈係密集且均勻的分布於該觸控面板的觸控區域。各該感應線圈會接收一驅動訊號而產生一電磁場，且當該電磁筆接近時，各該感應線圈產生的電磁場會發生改變，藉由該電磁場的改變，判斷出該電磁筆與各該感應線圈之間的距離，且找出與該電磁筆最接近的感應線圈，並根據該感應線圈位於該觸控區域的相對位置判斷該電磁筆的操作位置。The capacitive touch panel of the prior art uses a conductive or charged sensing object to change the capacitance value of the touch area when the touch area of the capacitive touch panel is operated, thereby determining that the conductive object is in the touch. The operating position of the control panel. In the prior art, there is another electromagnetic touch panel. The electromagnetic touch panel needs to be used with an electromagnetic pen, and includes a plurality of induction coils, and the plurality of induction coils are densely and evenly distributed on the touch panel. Touch area. Each of the induction coils receives a driving signal to generate an electromagnetic field, and when the electromagnetic pen approaches, the electromagnetic field generated by each of the induction coils changes, and the electromagnetic pen and each of the induction coils are determined by the change of the electromagnetic field. The distance between the two is found, and the induction coil closest to the electromagnetic pen is found, and the operating position of the electromagnetic pen is determined according to the relative position of the induction coil in the touch area.
該電磁式觸控面板係根據該複數感應線圈位於該觸控區域中的相對位置判斷該電磁筆的操作位置，為此，該採用電磁式觸控面板的觸控精準度係直接跟該複數感應線圈的密集度有關，當該複數感應線圈的數量越多的時候，識別觸控位置的精準度才會越高；此外，現有技術得電磁式觸控面板的感應線圈係採用金屬材質，而金屬材質不透光，通常設置於一顯示模組之後。對於同一大小的觸控面板而言，當該複數感應線圈的數量越來越多的時候，該複數感應線圈的製造難度會相對提高，因為各該感應線圈的大小會越來越小，且製作成本也會相對提高。為此，電磁式觸控面板的觸控模組與電容式觸控面板相比，會擁有較厚的厚度。因此，現有技術的電磁式觸控面板勢必要做進一步之改良。The electromagnetic touch panel determines the operating position of the electromagnetic pen according to the relative position of the plurality of induction coils in the touch area. For this reason, the touch precision of the electromagnetic touch panel is directly related to the complex sensing The density of the coil is related. When the number of the plurality of induction coils is increased, the accuracy of recognizing the touch position is higher. In addition, the induction coil of the prior art electromagnetic touch panel is made of metal and metal. The material is opaque and is usually placed behind a display module. For a touch panel of the same size, when the number of the plurality of induction coils is increased, the manufacturing difficulty of the plurality of induction coils is relatively increased, because the size of each of the induction coils is smaller and smaller, and the production is made. The cost will also increase relatively. For this reason, the touch module of the electromagnetic touch panel has a thicker thickness than the capacitive touch panel. Therefore, the prior art electromagnetic touch panel is in need of further improvement.
有鑑於現有技術的缺點，本發明的主要目的係提供一種具有接近感應功能之電容式觸控面板及其掃描方法，以進一步節省製作成本及降低製造難度。In view of the shortcomings of the prior art, the main object of the present invention is to provide a capacitive touch panel having a proximity sensing function and a scanning method thereof, thereby further saving manufacturing costs and reducing manufacturing difficulty.
為達到上述目的本發明所採用的技術手段係令該具有接近感應功能之電容式觸控面板包含有： 一觸控操作區； 複數感應線圈，係相互間隔排列設置該觸控操作區內，且各該複數感應線圈係對應其自身的電磁場變化量分別產生一第三軸感應訊號； 一線圈控制器，係電連接至各該感應線圈，並分別輸出一驅動訊號予各該複數感應線圈；及 一觸控面板控制器，係電連接至該線圈控制器，並依據各該感應線圈的第三軸感應訊號來判斷該感應物件相對於該觸控操作區的位置。In order to achieve the above object, the technical means adopted by the present invention is that the capacitive touch panel having the proximity sensing function comprises: a touch operation area; the plurality of induction coils are arranged at intervals in the touch operation area, and Each of the plurality of induction coils respectively generates a third axis sensing signal corresponding to its own electromagnetic field change amount; a coil controller is electrically connected to each of the induction coils, and respectively outputs a driving signal to each of the plurality of induction coils; A touch panel controller is electrically connected to the coil controller, and determines a position of the sensing object relative to the touch operating area according to the third axis sensing signal of each of the sensing coils.
且欲達到上述目的所使用的主要技術手段係令該具有接近感應功能之電容式觸控面板的掃描方法中的該電容式觸控面板包含有一觸控操作區及複數感應線圈，該複數感應線圈係相互間隔的排列設置於該觸控操作區的範圍內，而該掃描方法包含有： 分別輸出一驅動訊號予各該複數感應線圈； 偵測各該複數感應線圈的電磁場變化量，各該複數感應線圈對應其自身的電磁場變化量分別產生一第三軸感應訊號； 依據各該感應線圈的第三軸感應訊號來判斷該感應物件相對於該觸控操作區的位置。The main technical means for achieving the above purpose is that the capacitive touch panel of the capacitive touch panel having the proximity sensing function includes a touch operation area and a plurality of induction coils, and the plurality of induction coils The scanning method includes: respectively outputting a driving signal to each of the plurality of induction coils; detecting an electromagnetic field variation of each of the plurality of induction coils, each of the plurality The induction coil generates a third axis sensing signal corresponding to the amount of change of the electromagnetic field of the sensing coil. The position of the sensing object relative to the touch operating area is determined according to the third axis sensing signal of each of the sensing coils.
本發明具有接近感應功能之電容式觸控面板係主要兼具有電容感應及電磁感應功能，藉由該複數感應線圈預先判斷該感應物件位於該觸控操作區中的特定區域，再由該電容式觸控面板對該特定區域掃描以確定該感應物件位於該觸控操作區的觸碰位置，如此可減少掃描範圍來加速掃描時間，同時因只對該特定區域進行掃描，當使用者手持該感應物件的手掌觸碰於該電容式觸控面板的區域與該特定區域不重疊時，即可避免手掌誤觸造成的誤判，進而提高感測準確度。The capacitive touch panel with proximity sensing function mainly has a capacitive sensing and electromagnetic sensing function, and the plurality of sensing coils pre-determine that the sensing object is located in a specific area in the touch operating area, and then the capacitor The touch panel scans the specific area to determine the touch position of the sensing object in the touch operation area, so that the scanning range can be reduced to speed up the scanning time, and only the specific area is scanned, when the user holds the When the area where the palm of the sensing object touches the capacitive touch panel does not overlap with the specific area, the misjudgment caused by the palm touch may be avoided, thereby improving the sensing accuracy.
以下配合圖式及本發明較佳實施例，進一步闡述本發明為達成預定目的所採取的技術手段。The technical means adopted by the present invention for achieving the intended purpose are further explained below in conjunction with the drawings and preferred embodiments of the present invention.
請參閱圖1及圖2所示，本發明具有接近感應功能之電容式觸控面板10係包含有一觸控操作區11、複數感應線圈121、一線圈控制器13及一觸控面板控制器14。As shown in FIG. 1 and FIG. 2 , the capacitive touch panel 10 having the proximity sensing function includes a touch operation area 11 , a plurality of induction coils 121 , a coil controller 13 , and a touch panel controller 14 . .
該複數感應線圈121係相互呈間隔排列設置於該觸控操作區11內，並與該線圈控制器13電連接，該線圈控制器13分別輸出一驅動訊號予各感應線圈121，令各感應線圈121產生電磁場，各該感應線圈121會對應其自身的電磁場變化產生一第三軸感應訊號。該線圈控制器13係接收該第三軸感應訊號後並予以處理輸出，亦可依據各感應線圈121的第三軸感應訊號來判斷一感應物件有無接近，此外，亦可進一步依據該第三軸感應訊號計算該感應物件相對於該觸控操作區11的第三軸位置。由於該驅動訊號可為電壓訊號或電流訊號，故該感應線圈的第三軸感應訊號即可為電壓訊號或電流訊號，其中，第三軸係指垂直於該觸控操作區11的軸向，舉例而言，若該觸控操作區11是以X軸及Y軸構成的區域，該第三軸即為Z軸。The plurality of induction coils 121 are arranged in the touch operation area 11 at intervals and are electrically connected to the coil controller 13. The coil controller 13 outputs a driving signal to each of the induction coils 121 to make the induction coils. 121 generates an electromagnetic field, and each of the induction coils 121 generates a third axis sensing signal corresponding to its own electromagnetic field change. The coil controller 13 receives the third axis sensing signal and processes the output, and can also determine whether a sensing object is in proximity according to the third axis sensing signal of each induction coil 121, and further, according to the third axis The sensing signal calculates a third axis position of the sensing object relative to the touch operating area 11. Since the driving signal can be a voltage signal or a current signal, the third axis sensing signal of the induction coil can be a voltage signal or a current signal, wherein the third axis is perpendicular to the axial direction of the touch operating area 11 For example, if the touch operation area 11 is an area composed of an X axis and a Y axis, the third axis is a Z axis.
該觸控面板控制器14係對該觸控操作區11進行全掃描，以識別該感應物件的二維位置，又該觸控面板控制器14係電連接至該線圈控制器13，可於接收到該線圈控制器13所輸出各該感應線圈121的第三軸感應訊號後，依據各該感應線圈121的第三軸感應訊號來判斷該感應物件121相對於該觸控操作區11的初步二維位置。意即，該觸控面板控制器14係預設有一臨界值，並於接收到該線圈控制器13所輸出各該感應線圈121的第三軸感應訊號後，分別將各該感應線圈121產生的第三軸感應訊號與該臨界值進行比較，若其中一個第三軸感應訊號超過該臨界值，即判斷該感應物件係位於該具有超過該臨界值的第三軸感應訊號之感應線圈121所涵蓋的範圍內，該觸控面板控制器14便直接自全掃描程序切換至部份掃描程序。於部份掃描程序中，該觸控面板控制器14只對該觸控操作區11中對應該具有超過該臨界值的第三軸感應訊號之感應線圈121的範圍進行掃描，以快速獲得該感應物件的二維位置。此外，該觸控面板控制器14亦可進一步依據該第三軸感應訊號，計算該感應物件相對於該觸控操作區11的第三軸位置。又，該線圈控制器13及該觸控面板控制器14係可為二個獨立控制器，亦可進一步整合成單一積體電路的控制器，而該第三軸感應訊號係為該複數感應線圈121依照自身的電磁場變化所產生的感應電壓或感應電流。The touch panel controller 14 performs full scanning on the touch operation area 11 to identify the two-dimensional position of the sensing object, and the touch panel controller 14 is electrically connected to the coil controller 13 for receiving After the third axis sensing signal of each of the induction coils 121 is outputted by the coil controller 13, the first axis of the sensing object 121 relative to the touch operation area 11 is determined according to the third axis sensing signals of the induction coils 121. Dimensional position. That is, the touch panel controller 14 presets a threshold value, and after receiving the third axis sensing signal of each of the induction coils 121 outputted by the coil controller 13, respectively, respectively generates the induction coils 121. The third axis sensing signal is compared with the threshold value. If one of the third axis sensing signals exceeds the threshold value, it is determined that the sensing object is located in the induction coil 121 having the third axis sensing signal exceeding the threshold value. Within the scope of the touch panel controller 14 is directly switched from the full scan program to the partial scan program. In a part of the scanning process, the touch panel controller 14 scans only the range of the sensing coil 121 of the touch operating area 11 corresponding to the third axis sensing signal exceeding the threshold to quickly obtain the sensing. The two-dimensional position of the object. In addition, the touch panel controller 14 can further calculate a third axis position of the sensing object relative to the touch operating area 11 according to the third axis sensing signal. Moreover, the coil controller 13 and the touch panel controller 14 can be two independent controllers, and can be further integrated into a controller of a single integrated circuit, and the third axis sensing signal is the complex induction coil. 121 Inductive voltage or induced current generated according to changes in its own electromagnetic field.
於其他較佳實施利中，係由該線圈控制器13預設有該臨界值，並據以判斷各該感應線圈121的第三軸感應訊號是否超過該臨界值，並將具有超過該臨界值的第三軸感應訊號的感應線圈121所涵蓋的範圍傳送至該觸控面板控制器14。該觸控面板控制器14便只對該觸控操作區11中對應該具有超過該臨界值的第三軸感應訊號之感應線圈121的範圍進行掃描，以快速獲得該感應物件的二維位置。In other preferred implementations, the threshold value is pre-set by the coil controller 13, and it is determined whether the third axis sensing signal of each of the induction coils 121 exceeds the critical value, and will exceed the threshold. The range covered by the induction coil 121 of the third axis sensing signal is transmitted to the touch panel controller 14. The touch panel controller 14 scans only the range of the sensing coil 121 of the touch operating area 11 corresponding to the third axis sensing signal exceeding the threshold to quickly obtain the two-dimensional position of the sensing object.
該電容式觸控面板10還包含有一線圈感應層及一電容感應層。該觸控操作區11對應位於該電容感應層的感測範圍內，該電容感應層包含有複數第一軸跡線151及複數第二軸跡線152。該線圈感應層係設置於該觸控操作區11內，並疊合於該電容感應層，且包含該複數感應線圈121。各該感應線圈121所設置的範圍在該觸控操作區11上的位置係涵蓋到部分的第一軸跡線151及部分的第二軸跡線152，以圖2所示的該電容式觸控面板10係包含16條第一軸跡線151、9條第二軸跡線152及二個感應線圈121，其中各該感應線圈121係涵蓋16條第一軸跡線151及3條第二軸跡線152。當其中一個感應線圈121(左感應線圈)產生的第三軸感應訊號超過該臨界值時，該觸控面板控制器14便直接對該超過該臨界值的第三軸感應訊號所對應的感應線圈121涵蓋的該部分第一軸跡線151(X1~X16)及該部分第二軸跡線152(Y1~Y3)進行自容式或互容式掃描；因此，相較於全掃描程序掃描全部第一軸及第二軸跡線才進行二維位置識別，僅掃描部份第一軸及第二軸跡線151、152，可更快速地獲得位在該左上感應線圈121的感應物件的二維位置。The capacitive touch panel 10 further includes a coil sensing layer and a capacitive sensing layer. The touch operating area 11 is located within a sensing range of the capacitive sensing layer. The capacitive sensing layer includes a plurality of first axis traces 151 and a plurality of second axis traces 152. The coil sensing layer is disposed in the touch operating area 11 and is superposed on the capacitive sensing layer and includes the complex induction coil 121. The position of each of the induction coils 121 on the touch operation area 11 covers a portion of the first axis trace 151 and a portion of the second axis trace 152, such as the capacitive touch shown in FIG. The control panel 10 includes 16 first axis traces 151, 9 second axis traces 152, and two induction coils 121, wherein each of the induction coils 121 covers 16 first axis traces 151 and 3 second. Axis trace 152. When the third axis sensing signal generated by one of the sensing coils 121 (the left sensing coil) exceeds the threshold, the touch panel controller 14 directly directly connects the sensing coil corresponding to the third axis sensing signal exceeding the threshold. The portion of the first axis trace 151 (X1~X16) and the portion of the second axis trace 152 (Y1~Y3) covered by 121 are self-contained or mutually capacitively scanned; therefore, all scans are compared to the full scan program. The first axis and the second axis trace are only subjected to two-dimensional position recognition, and only part of the first axis and the second axis traces 151, 152 are scanned, and the sensing object located in the upper left induction coil 121 can be obtained more quickly. Dimensional position.
在本較佳實施例中，任二相鄰之感應線圈121的二個位置之間係一交界區域111。若該觸控面板控制器14比對並判斷其中二個相鄰的感應線圈121產生的第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的二組第三軸感應訊號之二相鄰感應線圈121的範圍內，即該二相鄰感應線圈121之交界區域111，且直接對該觸控操作區11中的交界區域111所涵蓋的部分第一軸跡線151及部分第二軸跡線152，即圖2中的X1~X16及Y4~Y6，進行掃描，以獲得該感應物件的二維位置。In the preferred embodiment, an interface region 111 is formed between two positions of any two adjacent induction coils 121. If the touch panel controller 14 compares and determines that the third axis sensing signal generated by two adjacent induction coils 121 exceeds the critical value, it is determined that the sensing object is located in the second group having the third axis exceeding the critical value. a portion of the first inductive coil 121 of the inductive signal, that is, the boundary region 111 of the two adjacent inductive coils 121, and a portion of the first axis trace 151 directly covered by the interface region 111 in the touch operating region 11 And a portion of the second axis trace 152, that is, X1~X16 and Y4~Y6 in FIG. 2, are scanned to obtain a two-dimensional position of the sensing object.
請參閱圖3及圖4A、B所示，本發明電容式觸控面板10的第一較佳實施例之電容感應層係進一步包含有一第一基板153及一第二基板154。該第一基板153之一側係設置有該複數第一軸跡線151，而該第二基板154之一側係設置有該複數第二軸跡線152，且該第二基板154係與該第一基板153互疊，但該第一基板153上的第一軸跡線151與該第二基板154上的第二軸跡線152互不電性接觸。該線圈感應層係包含有二並排的感應線圈121，且形成於該第一基板153設置有該複數第一軸跡線151之一側。各該感應線圈121分別與該不同部分的第一軸跡線151相互疊合，且各該感應線圈121與各該第一軸跡線151交會處係分別設有一絕緣層122，以電性隔絕該感應線圈121及該第一軸跡線151。同理，該線圈感應層的二感應線圈121亦可形成於該第二基板154設置有該複數第二軸跡線152之一側，各該感應線圈121分別與該不同部分的第二軸跡線152相互疊合，且該感應線圈121與該第二軸跡線152交會處係分別設有一絕緣層122，以電性隔絕該感應線圈121及該第二軸跡線152。此外，該感應線圈121亦可形成於第一基板153之另一側，使該感應線圈121與該第一軸跡線151分別位於該第一基板153之相對二側，或形成於第二基板154之另一側，使該感應線圈121與該第二軸跡線152分別位於該第二基板154之相對二側。Referring to FIG. 3 and FIG. 4A and FIG. 4B, the capacitive sensing layer of the first preferred embodiment of the capacitive touch panel 10 of the present invention further includes a first substrate 153 and a second substrate 154. The plurality of first axis traces 151 are disposed on one side of the first substrate 153, and the plurality of second axis traces 152 are disposed on one side of the second substrate 154, and the second substrate 154 is associated with the second substrate The first substrate 153 overlaps each other, but the first axis trace 151 on the first substrate 153 and the second axis trace 152 on the second substrate 154 are not in electrical contact with each other. The coil sensing layer includes two in-line induction coils 121 and is formed on one side of the first substrate 153 on which the plurality of first axis traces 151 are disposed. Each of the induction coils 121 is respectively overlapped with the first portion of the first axis traces 151, and each of the induction coils 121 and the first axis traces 151 are respectively provided with an insulating layer 122 to be electrically isolated. The induction coil 121 and the first axis trace 151. Similarly, the two induction coils 121 of the coil sensing layer may be formed on the side of the second substrate 154 on which one of the plurality of second axis traces 152 is disposed, and each of the induction coils 121 and the second portion of the different portions are respectively The wires 152 are overlapped with each other, and the insulating coils 121 and the second axis traces 152 are respectively disposed with an insulating layer 122 to electrically isolate the induction coils 121 and the second axis traces 152. In addition, the induction coil 121 can also be formed on the other side of the first substrate 153, such that the induction coil 121 and the first axis trace 151 are respectively located on opposite sides of the first substrate 153, or formed on the second substrate. On the other side of the 154, the induction coil 121 and the second axis trace 152 are respectively located on opposite sides of the second substrate 154.
請參閱圖5所示，本發明電容式觸控面板10的第二較佳實施例之電容感應層，其同樣包含有該第一基板153及該第二基板154，且該第一基板153之一側係設置有該複數第一軸跡線151，而該第二基板154之一側係設置有該複數第二軸跡線152。該第二基板154係與該第一基板153互疊，但該第一基板153上的第一軸跡線151與該第二基板154上的第二軸跡線152互不電性接觸。該線圈感應層包含有一第三基板123及二感應線圈121，各該感應線圈121係相互呈間隔地排列設置於該第三基板123之一側，該第三基板123係與該第二基板154互疊，但該第二基板154上的第二軸跡線152與該第三基板123上的感應線圈121互不電性接觸。As shown in FIG. 5 , the capacitive sensing layer of the second preferred embodiment of the capacitive touch panel 10 of the present invention also includes the first substrate 153 and the second substrate 154 , and the first substrate 153 The plurality of first axis traces 151 are disposed on one side, and the plurality of second axis traces 152 are disposed on one side of the second substrate 154. The second substrate 154 is overlapped with the first substrate 153, but the first axis trace 151 on the first substrate 153 and the second axis trace 152 on the second substrate 154 are not in electrical contact with each other. The coil sensing layer includes a third substrate 123 and two inductive coils 121. The inductive coils 121 are arranged at intervals on one side of the third substrate 123. The third substrate 123 is connected to the second substrate 154. The second axis traces 152 on the second substrate 154 are in non-electrical contact with the induction coils 121 on the third substrate 123.
進一步而言，請參閱圖6及圖7所示，本發明電容式觸控面板10的第三較佳實施例，其電容感應層係與第一較佳實施例相同，惟該線圈感應層係包含有四感應線圈121，並形成於該第一基板153設置有該複數第一軸跡線151之一側，各該感應線圈121分別與該不同部分的第一軸跡線151相互疊合，並呈矩陣排列，且各感應線圈121與各第一軸跡線151交會處係分別夾設有一絕緣層122(如圖4所示)，以隔絕該感應線圈121及該第一軸跡線151。Further, referring to FIG. 6 and FIG. 7 , in the third preferred embodiment of the capacitive touch panel 10 of the present invention, the capacitive sensing layer is the same as the first preferred embodiment, but the coil sensing layer is The first induction substrate 121 is disposed on one side of the plurality of first axis traces 151, and each of the induction coils 121 is overlapped with the different first portion of the first axis traces 151. And an array of insulation layers 122 (shown in FIG. 4) are respectively disposed at the intersection of each of the induction coils 121 and the first axis traces 151 to isolate the induction coil 121 and the first axis trace 151. .
在本較佳實施例中，任四相鄰之感應線圈121的四個位置的共同交界處係一中央區域112，且其中任二相鄰之感應線圈121的二個位置之間係該交界區域，共包含有四個交界區域111a、111b、111c、111d。若該觸控面板控制器14比對並判斷其中二個相鄰的感應線圈121產生的第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的二組第三軸感應訊號之二相鄰感應線圈121的範圍內，即該二相鄰感應線圈121之交界區域，且直接對該觸控操作區11中的交界區域所涵蓋的部分第一軸跡線151及部分第二軸跡線152。舉例來說，若感應物件靠近左上及右上的感應線圈121，則該左上及右上的感應線圈121產生的第三軸感應訊號會超過該臨界值，即判斷該感應物件靠近該左上及右上的感應線圈121之交界區域111a，並直接對該觸控操作區11中的交界區域111a所涵蓋的部分第一軸跡線151及部分第二軸跡線152進行掃描，即圖6中的X1~X7及Y4~Y6，以獲得該感應物件的二維位置。若該觸控面板控制器14比對並判斷該四個相鄰的感應線圈121產生的第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的四組第三軸感應訊號之四相鄰感應線圈121的範圍內，即該四相鄰感應線圈121的中央區域112，且直接對該觸控操作區11中的中央區域112所涵蓋的部分第一軸跡線151及部分第二軸跡線152進行掃描，即圖6中的X8~X9及Y4~Y6，以獲得該感應物件的二維位置。In the preferred embodiment, the common boundary of the four positions of any four adjacent induction coils 121 is a central region 112, and the boundary between the two positions of any two adjacent induction coils 121 is the boundary region. There are four boundary areas 111a, 111b, 111c, and 111d. If the touch panel controller 14 compares and determines that the third axis sensing signal generated by two adjacent induction coils 121 exceeds the critical value, it is determined that the sensing object is located in the second group having the third axis exceeding the critical value. The first axis trace 151 and the portion of the adjacent sensing coil 121 of the sensing signal, that is, the boundary region of the two adjacent sensing coils 121, and directly covering the boundary region in the touch operating region 11 Second axis trace 152. For example, if the sensing object is close to the upper left and upper right induction coils 121, the third axis sensing signal generated by the upper left and upper right sensing coils 121 exceeds the critical value, that is, the sensing object is close to the upper left and upper right sensing. The boundary region 111a of the coil 121 is directly scanned by a portion of the first axis trace 151 and a portion of the second axis trace 152 covered by the interface region 111a in the touch operation region 11, that is, X1~X7 in FIG. And Y4~Y6 to obtain the two-dimensional position of the sensing object. If the touch panel controller 14 compares and determines that the third axis sensing signal generated by the four adjacent induction coils 121 exceeds the critical value, it is determined that the sensing object is located in four sets of third axes having the threshold value. Within the range of four adjacent induction coils 121 of the inductive signal, that is, the central region 112 of the four adjacent induction coils 121, and a portion of the first axis trace 151 directly covered by the central region 112 in the touch operation region 11 And a portion of the second axis trace 152 is scanned, that is, X8~X9 and Y4~Y6 in FIG. 6 to obtain a two-dimensional position of the sensing object.
請參閱圖8所示，本發明電容式觸控面板10的第四較佳實施例，其電容感應層係與第二較佳實施例相同，而該線圈感應層亦與第二較佳實施例相同大致相同，惟包含有四感應線圈121，該四個感應線圈121係相互間隔地呈矩陣排列設置於該第三基板123之一側，該第三基板123係與該第二基板154互疊，但該第二基板154上的第二軸跡線152與該第三基板123上的感應線圈121互不電性接觸。Referring to FIG. 8 , a fourth preferred embodiment of the capacitive touch panel 10 of the present invention has the same capacitive sensing layer as the second preferred embodiment, and the coil sensing layer is also in the second preferred embodiment. The same is substantially the same, but includes four inductive coils 121 which are arranged in a matrix on one side of the third substrate 123. The third substrate 123 is overlapped with the second substrate 154. However, the second axis trace 152 on the second substrate 154 is in non-electrical contact with the induction coil 121 on the third substrate 123.
本發明係藉由該觸控面板控制器14判斷各該感應線圈121產生的第三軸感應訊號是否超過該臨界值，當任一第三軸感應訊號超過該臨界值時，即判斷該感應物件接近，並根據產生該超過臨界值的第三軸感應訊號的感應線圈121位於該觸控操作區11上的位置，直接掃描其所涵蓋的部分第一軸跡線151及部分第二軸跡線152，以減少需要掃描的跡線數量，便可於相同時間內掃描更多次數，來提高該電容式觸控面板10的感應準確度。進一步而言，尚可藉由該產生超過該臨界值的第三軸感應訊號的感應線圈121位於該觸控操作區11的位置，確認該感應物件的位置，並藉由直接掃描對應的部分第一軸跡線151及部分第二軸跡線152來排除其他非該感應物件所接觸該觸控操作區11而產生誤判情況。舉例來說，當使用者手持一電磁筆時，該電磁筆即為該感應物件，但使用者於手持該電磁筆於該電容式觸控面板10的觸控操作區11操作時，手掌部分容易誤觸到該觸控操作區11而造成該電容式觸控面板10的誤判。藉由本發明直接掃描部分第一軸跡線151及部分第二軸跡線152，當手掌與該電磁筆位於不同感應線圈121所對應的位置時，手掌觸碰位置的第一軸跡線151及第二軸跡線152不會被掃描，即可完全避免因手掌觸碰而有誤判感應物件位置的情況。故本發明確能有效減少誤判情況的發生。According to the present invention, the touch panel controller 14 determines whether the third axis sensing signal generated by each of the induction coils 121 exceeds the threshold value, and when any of the third axis sensing signals exceeds the threshold value, the sensing object is determined. Approaching, and directly scanning a portion of the first axis trace 151 and a portion of the second axis trace covered by the induction coil 121 that generates the third axis sensing signal exceeding the threshold value on the touch operation area 11 152, in order to reduce the number of traces that need to be scanned, more times can be scanned in the same time to improve the sensing accuracy of the capacitive touch panel 10. Further, the position of the sensing object is determined by the position of the sensing coil 121 that generates the third axis sensing signal exceeding the threshold value, and the corresponding part is directly scanned. The one-axis trace 151 and the portion of the second axis trace 152 exclude other non-inductive objects from contacting the touch operation area 11 to cause a false positive condition. For example, when the user holds an electromagnetic pen, the electromagnetic pen is the sensing object, but when the user holds the electromagnetic pen to operate in the touch operation area 11 of the capacitive touch panel 10, the palm portion is easy. The touch operation area 11 is accidentally touched to cause misjudgment of the capacitive touch panel 10. By directly scanning a portion of the first axis trace 151 and a portion of the second axis trace 152 by the present invention, when the palm and the electromagnetic pen are located at different positions of the different induction coils 121, the first axis trace 151 of the palm touch position and The second axis trace 152 is not scanned, and the position of the sensing object is misjudged due to the palm touch. Therefore, the present invention can effectively reduce the occurrence of misjudgment.
綜上所述，請參閱圖9所示，本發明具有接近感應功能之電容式觸控面板的掃描方法係包含有以下步驟： 對設在觸控操作區內的複數個感應線圈分別施加驅動訊號(S11)，使各該感應線圈產生一電磁場；當感應線圈之電磁場建立後，係偵測各該感應線圈之電磁場是否產生變化，當電磁場有變化時，係偵測各該感應線圈的電磁場變化量(S12)，其中，各該感應線圈會對應本身的電磁場變化量而產生一第三軸感應訊號；經接收各第三軸感應訊號後，係分析該第三軸感應訊號而判斷出感應物件相對於觸控操作區的位置資訊(S13)，針對步驟S13之細節係進一步說明如下。In summary, referring to FIG. 9 , the scanning method of the capacitive touch panel with proximity sensing function includes the following steps: respectively applying driving signals to a plurality of sensing coils disposed in the touch operating region; (S11), causing each of the induction coils to generate an electromagnetic field; when the electromagnetic field of the induction coil is established, detecting whether the electromagnetic field of each of the induction coils changes, and detecting an electromagnetic field change of each of the induction coils when the electromagnetic field changes. The quantity (S12), wherein each of the induction coils generates a third axis sensing signal corresponding to the amount of change of the electromagnetic field; after receiving the third axis sensing signals, analyzing the third axis sensing signal to determine the sensing object The details of step S13 are further described below with respect to the position information of the touch operation area (S13).
請參閱圖10所示，上述依據各該感應線圈的第三軸感應訊號來判斷該感應物件相對於該觸控操作區的二維位置及第三軸位置(S13)的步驟中，該判斷該感應物件相對於該觸控操作區的二維位置係包含有以下步驟： 預設一臨界值(S131)； 比對各該感應線圈產生的第三軸感應訊號與該臨界值(S132)，若該其中一個第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的第三軸感應訊號之感應線圈的範圍內(S133)；對該觸控操作區對應具有超過該臨界值的第三軸感應訊號之感應線圈的範圍進行掃描，以獲得該感應物件的二維位置(S134)； 若該其中二個第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的二組第三軸感應訊號之二感應線圈的範圍內(S135)；對該觸控操作區對應具有超過該臨界值的二組第三軸感應訊號之二感應線圈的二個位置之間的範圍進行掃描，以獲得該感應物件的二維位置(S136)； 若該其中四個第三軸感應訊號超過該臨界值，即判斷該感應物件位於具有超過該臨界值的四組第三軸感應訊號之四感應線圈的範圍內(S137)；對該觸控操作區對應具有超過該臨界值的四組第三軸感應訊號之四感應線圈的四個位置共同交界的範圍進行掃描，以獲得該感應物件的二維位置(S138)。Referring to FIG. 10, in the step of determining the two-dimensional position and the third axis position (S13) of the sensing object relative to the touch operating area according to the third axis sensing signal of each of the induction coils, the determining The two-dimensional position of the sensing object relative to the touch operation area includes the following steps: preset a threshold (S131); compare the third axis sensing signal generated by each of the induction coils with the threshold (S132), The third axis sensing signal exceeds the threshold value, that is, the sensing object is located in the range of the induction coil having the third axis sensing signal exceeding the threshold value (S133); The range of the sensing coil of the threshold value of the third axis sensing signal is scanned to obtain a two-dimensional position of the sensing object (S134); if the two third axis sensing signals exceed the threshold, it is determined that the sensing object is located Having two inductive coils of two sets of third-axis inductive signals exceeding the threshold (S135); and two inductive coils corresponding to the two sets of third-axis inductive signals having the threshold value corresponding to the touch operating area Scanning between the two positions to obtain a two-dimensional position of the sensing object (S136); if the four third axis sensing signals exceed the threshold, determining that the sensing object is located above the threshold Within the range of four induction coils of the four sets of third-axis inductive signals (S137); the touch operation area corresponding to four positions of four induction coils having four sets of third-axis inductive signals exceeding the threshold value The range is scanned to obtain a two-dimensional position of the sensing object (S138).
本發明的掃描方法係根據該複數感應線圈121產生的第三軸感應訊號來判斷該感應物件相對於觸控操作區11的二維位置及第三軸位置，且進一步根據該第三軸感應訊號超過該臨界值與否來比對及判斷該感應物件所在的範圍，當一個感應線圈121對應的第三軸感應訊號超過該臨界值時，即判斷該感應物件係位於該產生超過臨界值的第三軸感應訊號的感應線圈121的涵蓋範圍，並針對該涵蓋範圍內對應的部分第一軸及第二軸跡線掃151、152描來獲取感應物件的二維位置。當兩個感應線圈121對應的第三軸感應訊號超過該臨界值時，即判斷該感應物件係位於該產生超過臨界值的二組第三軸感應訊號的二個感應線圈121的涵蓋範圍之間，並針對該二涵蓋範圍之間對應的部分第一軸及第二軸跡線151、152掃描來獲取感應物件的二維位置。當四個感應線圈對應的第三軸感應訊號超過該臨界值時，即判斷該感應物件係位於該產生超過臨界值的四組第三軸感應訊號的四個感應線圈的涵蓋範圍的共同交界，並針對該四涵蓋範圍的共同交界對應的部分第一軸及第二軸跡線掃描來獲取感應物件的二維位置。The scanning method of the present invention determines the two-dimensional position and the third axis position of the sensing object relative to the touch operating area 11 according to the third axis sensing signal generated by the complex induction coil 121, and further according to the third axis sensing signal. When the threshold value is compared or not, the range of the sensing object is compared. When the third axis sensing signal corresponding to the sensing coil 121 exceeds the threshold, it is determined that the sensing object is located at the threshold exceeding the threshold. The coverage of the inductive coil 121 of the triaxial inductive signal is plotted for the corresponding partial first and second axis traces 151, 152 within the coverage to obtain the two dimensional position of the inductive object. When the third axis sensing signal corresponding to the two sensing coils 121 exceeds the critical value, it is determined that the sensing object is located between the two sensing coils 121 of the two sets of third axis sensing signals that exceed the critical value. And scanning for a portion of the first axis and the second axis traces 151, 152 corresponding to the two coverage areas to obtain a two-dimensional position of the sensing object. When the third axis sensing signal corresponding to the four induction coils exceeds the critical value, it is determined that the sensing object is located at a common boundary of the coverage of the four induction coils of the four sets of third-axis sensing signals that exceed the critical value. The two-dimensional position of the sensing object is obtained by scanning a portion of the first axis and the second axis trace corresponding to the common boundary of the four coverage areas.
為此，本發明係減少了需要掃描的第一軸跡線151及第二軸跡線152，以可在相同單位時間內執行更多次的掃描來判斷該感應物件的二維位置，來提高本發明電容式觸控面板10的感度。進一步而言，本發明係只針對部分的第一軸及第二軸跡線151、152來掃描，且該部分的第一軸及第二軸跡線151、152係根據該超過該臨界值的第三軸感應訊號所選取，係直接掃描該感應物件附近的第一軸及第二軸跡線151、152；因此，本發明確能減少非感應物件誤觸時的誤判。進一步而言，本發明還可藉由增加該感應線圈121的數量來縮小執行部份掃描程序所需要掃描的跡線的數量，以及縮小各該感應線圈121的位置所涵蓋的範圍，並可同步縮小該交界區域111及該中央區域112的涵蓋範圍，更進一步地增加本發明的掃描精準度。且縮小部份掃描的範圍後，手掌及感應物件同時位於同一掃描範圍內的可能性就更低，以進一步加強排除手掌誤觸時的誤判的能力。To this end, the present invention reduces the first axis trace 151 and the second axis trace 152 that need to be scanned, so that more scans can be performed in the same unit time to determine the two-dimensional position of the sensing object, thereby improving The sensitivity of the capacitive touch panel 10 of the present invention. Further, the present invention scans only a portion of the first and second axis traces 151, 152, and the first and second axis traces 151, 152 of the portion are based on the threshold value exceeding The third axis sensing signal is selected to directly scan the first axis and the second axis traces 151, 152 in the vicinity of the sensing object; therefore, the present invention can reduce the misjudgment when the non-inductive object is accidentally touched. Further, the present invention can also reduce the number of traces required to perform a partial scanning process by reducing the number of the induction coils 121, and reduce the range covered by the positions of the respective induction coils 121, and can synchronize The coverage of the boundary region 111 and the central region 112 is reduced, and the scanning accuracy of the present invention is further increased. After narrowing the range of partial scanning, the possibility that the palm and the sensing object are in the same scanning range at the same time is even lower, so as to further strengthen the ability to eliminate misjudgment when the palm is mistaken.
以上所述僅是本發明的較佳實施例而已，並非對本發明做任何形式上的限制，雖然本發明已較佳實施例揭露如上，然而並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明技術方案的範圍內，當可利用上述揭示的技術內容作出些許更動或修飾為等同變化的等效實施例，但凡是未脫離本發明技術方案的內容，依據本發明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，均仍屬於本發明技術方案的範圍內。The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the preferred embodiments of the present invention are disclosed above, the present invention is not limited thereto, and is generally Those skilled in the art can make some modifications or modifications to equivalent embodiments using the above-disclosed technical contents without departing from the technical scope of the present invention, but the present invention does not deviate from the technical solution of the present invention. Technical Substantials Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the technical solutions of the present invention.
10‧‧‧電容式觸控面板
11‧‧‧觸控操作區
111‧‧‧交界區域
111a‧‧‧交界區域
111b‧‧‧交界區域
111c‧‧‧交界區域
111d‧‧‧交界區域
112‧‧‧中央區域
121‧‧‧感應線圈
122‧‧‧絕緣層
123‧‧‧第三基板
13‧‧‧線圈控制器
14‧‧‧觸控面板控制器
151‧‧‧第一軸跡線
152‧‧‧第二軸跡線
153‧‧‧第一基板
154‧‧‧第二基板10‧‧‧Capacitive touch panel
11‧‧‧Touch operation area
111‧‧‧ junction area
111a‧‧‧ junction area
111b‧‧‧ junction area
111c‧‧‧ junction area
111d‧‧‧ junction area
112‧‧‧Central area
121‧‧‧Induction coil
122‧‧‧Insulation
123‧‧‧ third substrate
13‧‧‧ coil controller
14‧‧‧Touch Panel Controller
151‧‧‧First Axis Trace
152‧‧‧Second axis trace
153‧‧‧First substrate
154‧‧‧second substrate
圖1係本發明電容式觸控面板之功能方塊示意圖。 圖2係本發明電容式觸控面板第一較佳實施例之俯視示意圖。 圖3係本發明電容式觸控面板第一較佳實施例之立體分解示意圖。 圖4A係本發明電容式觸控面板第一較佳實施例之局部立體示意圖。 圖4B係本發明電容式觸控面板第一較佳實施例之局部剖面示意圖。 圖5係本發明電容式觸控面板第二較佳實施例之立體分解示意圖。 圖6係本發明電容式觸控面板第三較佳實施例之俯視示意圖。 圖7係本發明電容式觸控面板第三較佳實施例之立體分解示意圖。 圖8係本發明電容式觸控面板第四較佳實施例之立體分解示意圖。 圖9係本發明電容式觸控面板之掃描方法之流程圖。 圖10係本發明電容式觸控面板之掃描方法之判斷位置步驟之流程圖。1 is a functional block diagram of a capacitive touch panel of the present invention. 2 is a top plan view of a first preferred embodiment of a capacitive touch panel of the present invention. 3 is a perspective exploded view of a first preferred embodiment of the capacitive touch panel of the present invention. 4A is a partial perspective view of a first preferred embodiment of a capacitive touch panel of the present invention. 4B is a partial cross-sectional view showing a first preferred embodiment of the capacitive touch panel of the present invention. FIG. 5 is a perspective exploded view of a second preferred embodiment of the capacitive touch panel of the present invention. 6 is a top plan view of a third preferred embodiment of the capacitive touch panel of the present invention. FIG. 7 is a perspective exploded view of a third preferred embodiment of the capacitive touch panel of the present invention. FIG. 8 is a perspective exploded view of a fourth preferred embodiment of the capacitive touch panel of the present invention. 9 is a flow chart of a scanning method of the capacitive touch panel of the present invention. FIG. 10 is a flow chart showing the steps of determining the position of the scanning method of the capacitive touch panel of the present invention.
10‧‧‧電容式觸控面板 10‧‧‧Capacitive touch panel
121‧‧‧感應線圈 121‧‧‧Induction coil
13‧‧‧線圈控制器 13‧‧‧ coil controller
14‧‧‧觸控面板控制器 14‧‧‧Touch Panel Controller
151‧‧‧第一軸跡線 151‧‧‧First Axis Trace
152‧‧‧第二軸跡線 152‧‧‧Second axis trace
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| CN106850919A (en) * | 2016-12-30 | 2017-06-13 | 努比亚技术有限公司 | A kind of control method and mobile terminal |
| CN109388286B (en) * | 2018-09-26 | 2022-03-22 | Oppo广东移动通信有限公司 | Proximity state judgment method and device |
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