TWI834507B - Method for transmitting signals and touch screen - Google Patents
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Abstract
Description
本申請涉及觸控技術領域，具體涉及一種信號傳輸方法及觸控屏。 This application relates to the field of touch technology, and specifically to a signal transmission method and a touch screen.
目前，電子終端廠商為提供使用者更加優秀之應用體驗，所製造之電子終端產品之觸控屏之尺寸不斷擴大，以及對應之應用軟體亦需要更高精度之觸控檢測，因此製造了可與電容式觸控屏配套使用之電容式主動筆，並逐漸普及。 Currently, in order to provide users with a better application experience, electronic terminal manufacturers manufacture electronic terminal products with ever-expanding touch screens, and the corresponding application software also requires higher-precision touch detection. Therefore, they have manufactured touch screens that can be used with The capacitive active pen used in conjunction with the capacitive touch screen has become increasingly popular.
然而，習知技術之觸控屏於與觸控筆進行通信時，即觸控屏傳輸上行信號至觸控筆時，容易對觸控屏之顯示效果造成影響。 However, when the touch screen of the conventional technology communicates with the stylus, that is, when the touch screen transmits an uplink signal to the stylus, it is easy to affect the display effect of the touch screen.
鑒於此，本申請提供一種信號傳輸方法及觸控屏，用以使觸控屏於傳輸上行信號至主動筆時，不會影響觸控屏顯示效果。本申請技術方案如下： In view of this, the present application provides a signal transmission method and a touch screen, so that the touch screen does not affect the display effect of the touch screen when transmitting uplink signals to the active pen. The technical solution for this application is as follows:
第一方面，本申請提供一種信號傳輸方法，應用於觸控屏，所述觸控屏包括觸控電極，所述方法包括：獲取觸控筆於所述觸控屏上之當前觸點；根據所述當前觸點確定所述觸控屏上之第一區域及第二區域，所述第一區域包括所述當前觸點，所述第一區域以及所述第二區域均不重疊；控制所述第一區域之所述觸控電極傳輸上行信號，控制所述第二區域之所述觸控電極傳輸反相信號；其中，所述上行信號用以傳輸至所述觸控筆，以與所述觸控筆進行通信， 所述反相信號之相位與所述上行信號之相位相反；所述第二區域之所述觸控電極之數量大於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度大於所述反相信號之電壓幅度；或者，所述第二區域之所述觸控電極之數量少於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度小於所述反相信號之電壓幅度。 In a first aspect, the present application provides a signal transmission method applied to a touch screen. The touch screen includes touch electrodes. The method includes: obtaining the current contact point of a stylus on the touch screen; according to The current touch point determines the first area and the second area on the touch screen, the first area includes the current touch point, and the first area and the second area do not overlap; control all The touch electrode in the first area transmits an uplink signal, and the touch electrode in the second area is controlled to transmit an inverse signal; wherein the uplink signal is used to transmit to the stylus to communicate with the stylus. the stylus to communicate, The phase of the inverted signal is opposite to the phase of the uplink signal; the number of the touch electrodes in the second area is greater than the number of the touch electrodes in the first area, and the voltage of the uplink signal The amplitude is greater than the voltage amplitude of the inverted signal; or, the number of the touch electrodes in the second area is less than the number of the touch electrodes in the first area, and the voltage amplitude of the uplink signal is less than The voltage amplitude of the inverted signal.
於本申請一實施例中，所述獲取觸控筆於所述觸控屏上之當前觸點，包括：藉由所述觸控電極接收所述觸控筆發送之下行信號，根據所述下行信號獲取所述當前觸點；所述上行信號與所述下行信號按照預設協定分時傳輸。 In an embodiment of the present application, obtaining the current contact point of the stylus on the touch screen includes: receiving a downstream signal sent by the stylus through the touch electrode, and receiving a downstream signal according to the downstream signal. The signal acquires the current contact point; the uplink signal and the downlink signal are transmitted in a time-sharing manner according to a preset agreement.
第二方面，本申請提供一種信號傳輸方法，應用於觸控屏，所述觸控屏包括觸控電極，所述方法包括：獲取觸控筆於所述觸控屏上之當前觸點；根據所述當前觸點確定所述觸控屏上之第一區域、第二區域以及第三區域，所述第一區域包括所述當前觸點，所述第一區域、所述第二區域以及所述第三區域均不重疊；控制所述第一區域之所述觸控電極傳輸上行信號，控制所述第二區域之所述觸控電極傳輸反相信號，及控制所述第三區域之所述觸控電極接地；其中，所述上行信號用以傳輸至所述觸控筆，以與所述觸控筆進行通信，所述反相信號之相位與所述上行信號之相位相反。 In a second aspect, the present application provides a signal transmission method applied to a touch screen. The touch screen includes touch electrodes. The method includes: obtaining the current contact point of a stylus on the touch screen; according to The current touch point determines a first area, a second area and a third area on the touch screen. The first area includes the current touch point, the first area, the second area and the third area. None of the third areas overlap; the touch electrodes in the first area are controlled to transmit uplink signals, the touch electrodes in the second area are controlled to transmit inverse signals, and the touch electrodes in the third area are controlled to transmit uplink signals. The touch electrode is grounded; wherein the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is opposite to the phase of the uplink signal.
於本申請一實施例中，所述第二區域之所述觸控電極之數量等於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度等於所述反相信號之電壓幅度；或者，所述第二區域之所述觸控電極之數量大於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度大於所述反相信號之電壓幅度；或者，所述第二區域之所述觸控電極之數量少於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度小於所述反相信號之電壓幅度。 In an embodiment of the present application, the number of touch electrodes in the second area is equal to the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is equal to the voltage amplitude of the inverted signal. Voltage amplitude; or, the number of the touch electrodes in the second area is greater than the number of the touch electrodes in the first area, and the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inverted signal; Alternatively, the number of touch electrodes in the second area is less than the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inverted signal.
於本申請一實施例中，所述第三區域為所述觸控屏上除所述第一區域及所述第二區域之剩餘區域。 In an embodiment of the present application, the third area is the remaining area on the touch screen except the first area and the second area.
於本申請一實施例中，所述獲取觸控筆於所述觸控屏上之當前觸點，包括：藉由所述觸控電極接收所述觸控筆發送之下行信號，根據所述下行信號獲取所述當前觸點；所述上行信號與所述下行信號按照預設協定分時傳輸。 In an embodiment of the present application, obtaining the current contact point of the stylus on the touch screen includes: receiving a downstream signal sent by the stylus through the touch electrode, and receiving a downstream signal according to the downstream signal. The signal acquires the current contact point; the uplink signal and the downlink signal are transmitted in a time-sharing manner according to a preset agreement.
第三方面，本申請提供一種觸控屏，包括觸控晶片，以及與所述觸控晶片連接之觸控電極；所述觸控晶片，用以獲取觸控筆於所述觸控屏上之當前觸點，以及根據所述當前觸點確定所述觸控屏上之第一區域以及第二區域，所述第一區域包括所述當前觸點，所述第一區域與所述第二區域均不重疊，以及控制所述第一區域之所述觸控電極傳輸上行信號，控制所述第二區域之所述觸控電極傳輸反相信號；其中，所述上行信號用以傳輸至所述觸控筆，以與所述觸控筆進行通信，所述反相信號之相位與所述上行信號之相位相反；所述第二區域之所述觸控電極之數量大於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度大於所述反相信號之電壓幅度；或者，所述第二區域之所述觸控電極之數量少於所述第一區域之所述觸控電極之數量，所述上行信號之電壓幅度小於所述反相信號之電壓幅度。 In a third aspect, the present application provides a touch screen, including a touch chip and a touch electrode connected to the touch chip; the touch chip is used to obtain a stylus on the touch screen. The current touch point, and determining the first area and the second area on the touch screen based on the current touch point, the first area including the current touch point, the first area and the second area None overlap, and the touch electrodes in the first area are controlled to transmit uplink signals, and the touch electrodes in the second area are controlled to transmit inverse signals; wherein the uplink signals are used to transmit to the A stylus to communicate with the stylus, the phase of the inverted signal is opposite to the phase of the uplink signal; the number of the touch electrodes in the second area is greater than that of the first area The number of touch electrodes, the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inversion signal; or, the number of touch electrodes in the second area is less than the number of touch electrodes in the first area. The number of touch electrodes, the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inversion signal.
於本申請一實施例中，所述觸控屏包括依次設置之基板、陽極層、發光二極體層、陰極層、封裝層、觸控電極層以及保護層。 In one embodiment of the present application, the touch screen includes a substrate, an anode layer, a light-emitting diode layer, a cathode layer, an encapsulation layer, a touch electrode layer and a protective layer arranged in sequence.
第四方面，本申請提供一種觸控屏，包括觸控晶片，以及與所述觸控晶片連接之觸控電極；所述觸控晶片，用以獲取觸控筆於所述觸控屏上之當前觸點，以及根據所述當前觸點確定所述觸控屏上之第一區域、第二區域以及第三區域，所述第一區域包括所述當前觸點，所述第一區域、所述第二區域以及所述第三區域均不重疊，以及控制所述第一區域之所述觸控電極傳輸上行信號，控制所述第二區域之所述觸控電極傳輸反相信號，及控制所述第三區域之所述觸控電極接地；其中，所述上行信號用以傳輸至所述觸控筆，以與所述觸控筆進行通信，所述反相信號之相位與所述上行信號之相位相反。 In a fourth aspect, the present application provides a touch screen, including a touch chip and a touch electrode connected to the touch chip; the touch chip is used to obtain a stylus on the touch screen. The current touch point, and determining the first area, the second area and the third area on the touch screen according to the current touch point, the first area includes the current touch point, the first area, the The second area and the third area do not overlap, and the touch electrodes in the first area are controlled to transmit uplink signals, the touch electrodes in the second area are controlled to transmit inversion signals, and the control The touch electrode in the third area is grounded; wherein the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is consistent with the uplink signal. The phase of the signal is opposite.
於本申請一實施例中，所述觸控屏包括依次設置之基板、陽極層、發光二極體層、陰極層、封裝層、觸控電極層以及保護層。 In one embodiment of the present application, the touch screen includes a substrate, an anode layer, a light-emitting diode layer, a cathode layer, an encapsulation layer, a touch electrode layer and a protective layer arranged in sequence.
本申請提供之技術方案帶來之有益效果至少包括：觸控屏於傳輸上行信號至觸控筆時，於第一區域之觸控電極上驅動上行信號，以及於第二區域之觸控電極上驅動反相信號，該反相信號之相位與上行信號之相位相反，因此，同一時間上行信號導致觸控屏之陰極層產生第一電壓，反相信號導致觸控屏之陰極層產生第二電壓，第一電壓與第二電壓於同一時間段內之相位亦係相反的，因此從觸控層耦合到陰極之電荷可以相互抵消，從而使觸控屏於傳輸上行信號時，減輕了對顯示效果之干擾。 The beneficial effects brought by the technical solution provided by this application at least include: when the touch screen transmits the uplink signal to the stylus, it drives the uplink signal on the touch electrode in the first area, and drives the uplink signal on the touch electrode in the second area. Driving an inverted signal, the phase of the inverted signal is opposite to the phase of the uplink signal. Therefore, at the same time, the uplink signal causes the cathode layer of the touch screen to generate a first voltage, and the inverted signal causes the cathode layer of the touch screen to generate a second voltage. , the phases of the first voltage and the second voltage are also opposite in the same time period, so the charges coupled from the touch layer to the cathode can cancel each other, thereby reducing the impact on the display when the touch screen transmits uplink signals. interference.
100:觸控屏 100:Touch screen
110:驅動電極 110: Driving electrode
120:接收電極 120: receiving electrode
210:觸控屏 210:Touch screen
220:主動筆 220:Active pen
300:觸控屏 300:Touch screen
310:基板 310:Substrate
320:陽極層 320: Anode layer
330:發光二極體層 330: Light emitting diode layer
340:陰極層 340:Cathode layer
350:封裝層 350: Encapsulation layer
360:觸控電極層 360:Touch electrode layer
370:保護層 370:Protective layer
700:觸控屏 700:Touch screen
710:第一區域 710:First area
720:第二區域 720:Second area
800:觸控屏 800:Touch screen
810:第一區域 810:First area
820:第二區域 820:Second area
1000:觸控屏 1000:Touch screen
1010:第一區域 1010:First area
1020:第二區域 1020:Second area
1030:第三區域 1030:The third area
1200:觸控屏 1200:Touch screen
1210:觸控晶片 1210:Touch chip
1220:觸控電極 1220:Touch electrode
S51~S53，S91~S93，S111~S114:步驟 S51~S53, S91~S93, S111~S114: steps
圖1係本申請提供之一種觸控屏之結構示意圖。 Figure 1 is a schematic structural diagram of a touch screen provided by this application.
圖2係本申請提供之一種觸控屏及主動筆之信號傳輸示意圖。 Figure 2 is a schematic diagram of signal transmission between a touch screen and an active pen provided by this application.
圖3係本申請提供之一種觸控屏之層疊結構圖。 Figure 3 is a stacked structure diagram of a touch screen provided by this application.
圖4係本申請提供之一種習知之觸控屏上行信號之示意圖。 FIG. 4 is a schematic diagram of a conventional touch screen uplink signal provided by this application.
圖5係本申請實施例提供之一種信號傳輸方法之流程示意圖。 FIG. 5 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application.
圖6係本申請實施例提供之一種觸控屏中之信號對比圖。 FIG. 6 is a signal comparison diagram in a touch screen provided by an embodiment of the present application.
圖7係本申請實施例提供之一種觸控屏驅動上行信號之示意圖。 FIG. 7 is a schematic diagram of a touch screen driving uplink signal provided by an embodiment of the present application.
圖8係本申請實施例提供之一種觸控屏驅動上行信號之示意圖。 FIG. 8 is a schematic diagram of a touch screen driving uplink signal provided by an embodiment of the present application.
圖9係本申請實施例提供之一種信號傳輸方法之流程示意圖。 FIG. 9 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application.
圖10係本申請實施例提供之一種觸控屏驅動上行信號之示意圖。 FIG. 10 is a schematic diagram of a touch screen driving uplink signal provided by an embodiment of the present application.
圖11係本申請實施例提供之一種信號傳輸方法之流程示意圖。 Figure 11 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application.
圖12係本申請實施例提供之一種觸控屏之結構示意圖。 FIG. 12 is a schematic structural diagram of a touch screen provided by an embodiment of the present application.
需要說明，本申請實施例中“至少一個”係指一個或者多個，“多個”係指兩個或多於兩個。“與/或”，描述關聯物件之關聯關係，表示可以存在三種關係，例如，A與/或B可以表示：單獨存在A，同時存在A與B，單獨存在B之情況，其中A，B可為單數或者複數。本申請之說明書與請求項書及附圖中之術語“第一”、“第二”、“第三”、“第四”等(如果存在)係用以區別類似之物件，而不係用以描述特定之順序或先後次序。 It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "multiple" refers to two or more than two. "And/or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can Be singular or plural. The terms "first", "second", "third", "fourth", etc. (if present) in the description, claims and drawings of this application are used to distinguish similar objects and are not used to To describe a specific order or sequence.
另外需要說明的係，本申請實施例中公開之方法或流程圖所示出之方法，包括用以實現方法之一個或多個步驟，於不脫離請求項之範圍之情況下，多個步驟之執行順序可以彼此互換，其中某些步驟亦可以被刪除。 In addition, it should be noted that the method disclosed in the embodiment of the present application or the method shown in the flow chart includes one or more steps for implementing the method. Without departing from the scope of the claims, any of the multiple steps The order of execution can be interchanged with each other, and some steps can be deleted.
目前，隨著觸控屏技術之不斷進步，市面上大多數之電子產品之人機交互功能均採用觸控屏來實現，尤其係各類電子終端產品，例如手機、平板電腦、筆記本以及電子書等電子終端，大多數採用電容式觸控屏來進行人機交互。 Currently, with the continuous advancement of touch screen technology, most of the human-computer interaction functions of electronic products on the market are implemented using touch screens, especially various electronic terminal products, such as mobile phones, tablets, notebooks, and e-books. Most electronic terminals use capacitive touch screens for human-computer interaction.
並且，電子終端廠商為提供使用者更加優秀之應用體驗，所製造之電子終端產品之觸控屏之尺寸不斷擴大，以及對應之應用軟體亦需要更高精度之觸控檢測，因此製造了可與電容式觸控屏配套使用之電容式主動筆，並逐漸普及。 Moreover, in order to provide users with a better application experience, electronic terminal manufacturers have continuously expanded the size of the touch screens of the electronic terminal products they manufacture, and the corresponding application software also requires higher-precision touch detection. Therefore, they have manufactured products that can be used with The capacitive active pen used in conjunction with the capacitive touch screen has become increasingly popular.
請參考圖1，圖1為本申請提供之一種觸控屏之結構示意圖。其中，該觸控屏100包括多列驅動電極110(圖中示例為4列驅動電極110，每列包括6個相連之菱形驅動電極)，以及多行接收電極120(圖中示例為5行接收電極120，每行包括5個相連之菱形接收電極)組成。每列之驅動電極110與每行之接收電極120之間絕緣正交。 Please refer to FIG. 1 , which is a schematic structural diagram of a touch screen provided by the present application. The touch screen 100 includes multiple columns of driving electrodes 110 (the example in the figure is 4 columns of driving electrodes 110, each column includes 6 connected diamond-shaped driving electrodes), and multiple rows of receiving electrodes 120 (the example in the figure is 5 rows of receiving electrodes). Electrodes 120, each row includes 5 connected diamond-shaped receiving electrodes). The driving electrodes 110 of each column and the receiving electrodes 120 of each row are insulated and orthogonal to each other.
其中，每列之驅動電極110形成載波信號之發送通道，而每行之接收電極120形成載波信號之接收通道。於檢測觸控屏上之觸控點時，藉由驅動電 極110傳輸預設頻率之載波觸控信號，接收電極120與驅動電極110耦合形成節點互容。導體(如人體或觸控筆)靠近或接觸觸控屏時，主動筆會分別跟驅動電極與接收電極形成耦合電容，此時筆尖電極發送載波信號，觸控屏之驅動電極與接收電極分別接收來自筆尖電極之電荷資訊，轉換為數位信號傳輸至微處理器即可進行主動筆觸控點之檢測，從而計算出主動筆觸控點於觸控屏上之座標。 The driving electrodes 110 in each column form a transmission channel for the carrier signal, and the receiving electrodes 120 in each row form a receiving channel for the carrier signal. When detecting the touch point on the touch screen, by driving the circuit The electrode 110 transmits a carrier touch signal of a predetermined frequency, and the receiving electrode 120 and the driving electrode 110 are coupled to form node mutual capacitance. When a conductor (such as the human body or a stylus) approaches or touches the touch screen, the active pen will form a coupling capacitor with the driving electrode and receiving electrode respectively. At this time, the pen tip electrode sends a carrier signal, and the driving electrode and receiving electrode of the touch screen receive the signal from the touch screen respectively. The charge information of the pen tip electrode is converted into a digital signal and transmitted to the microprocessor to detect the active pen touch point, thereby calculating the coordinates of the active pen touch point on the touch screen.
請參考圖2，為本申請提供之一種觸控屏及主動筆之信號傳輸示意圖。其中，主動筆220可向觸控屏210傳輸下行信號，觸控屏210可向主動筆220傳輸上行信號。
Please refer to Figure 2, which is a schematic diagram of signal transmission between a touch screen and an active pen provided in this application. The
該主動筆220內部設置有電源、下行信號生成模組、上行信號檢測模組以及壓力檢測模組等。而觸控屏210檢測主動筆220之筆尖觸控點位置之過程包括：主動筆220藉由下行信號生成模組生成下行信號，於筆尖接觸到觸控屏210時，將該下行信號傳輸至觸控屏210之觸點位置上之觸控電極；而觸控屏210之觸控電極與主動筆220之筆尖形成耦合電容，從而使觸控電極產生與下行信號相對應之電荷資訊，觸控屏210藉由上述之互容檢測過程，即可將主動筆220之筆尖於觸控屏上之位置計算出來。其中，該下行信號之發送時間、頻率、波形以及幅度等藉由協定來進行約束，從而使觸控屏210可以區別出主動筆220以及手指觸控，使主動筆220以及手指觸控可以協同操作。
The
而觸控屏210需要向主動筆220發送上行信號進行通信。如傳輸上行信號係為通知主動筆220調整下行信號之參數，此外上行信號充當了給主動筆220提供了時間窗同步信號之功能。例如，於觸控屏210之微處理器或者觸控晶片檢測到主動筆220發送之下行信號之頻率受到干擾時，微處理器或者觸控晶片需要藉由上行信號通知主動筆220進行跳頻以避開干擾頻點，從而提升主動筆220下行信號之信噪比，保持對筆尖位置檢測之精度。其中，上行信號藉由特定之編碼方式將相關資訊，例如觸控晶片類型、跳頻資訊、檢測視窗配置資訊等，
藉由觸控電極與主動筆220之筆尖形成耦合電容，從而將資訊以電荷資訊之方式傳遞給主動筆220。
The
然而，習知技術之觸控屏之上行信號之傳輸方式，會影響觸控屏之顯示。請參考圖3，為本申請提供之一種觸控屏之層疊結構圖。其中，該觸控屏300包括基板310、陽極層320、發光二極體層330、陰極層340、封裝層350、觸控電極層360以及保護層370。 However, the transmission method of uplink signals on the touch screen in the conventional technology will affect the display of the touch screen. Please refer to Figure 3, which is a stacked structure diagram of a touch screen provided in this application. The touch screen 300 includes a substrate 310, an anode layer 320, a light emitting diode layer 330, a cathode layer 340, an encapsulation layer 350, a touch electrode layer 360 and a protective layer 370.
其中，該陽極層320以及陰極層340驅動有直流電平，觸控屏300之顯示驅動晶片藉由控制信號控制發光二極體層330中之電晶體從陽極層320中獲取電流去驅動發光二極體，並與陰極層340形成回路，最終電流流向陰極層340，即顯示驅動晶片可以控制電晶體給發光二極體驅動不同之電流，從而控制發光二極體發出不同之亮度與顏色，以控制觸控屏300顯示相應之畫面。該封裝層350用以密封發光二極體層330以隔絕水汽，覆蓋於陰極層340上。而觸控電極層360則設置於封裝層350上，該觸控電極層360中可以包括有接收電極以及驅動電極。該保護層370覆蓋於觸控電極層360之上，用以保護觸控電極層360，並且可以為絕緣材料。其中，上述觸控屏之層疊結構可以應用於柔性觸控屏上，該基板310與封裝層350為柔性結構，優選採用柔性膜。 Among them, the anode layer 320 and the cathode layer 340 are driven with a DC level, and the display driver chip of the touch screen 300 controls the transistor in the light-emitting diode layer 330 through the control signal to obtain current from the anode layer 320 to drive the light-emitting diode. , and forms a loop with the cathode layer 340, and finally the current flows to the cathode layer 340, that is, the display driver chip can control the transistor to drive different currents to the light-emitting diodes, thereby controlling the light-emitting diodes to emit different brightness and colors to control the touch The control screen 300 displays the corresponding screen. The encapsulation layer 350 is used to seal the light-emitting diode layer 330 to isolate water vapor, and covers the cathode layer 340 . The touch electrode layer 360 is disposed on the packaging layer 350. The touch electrode layer 360 may include receiving electrodes and driving electrodes. The protective layer 370 covers the touch electrode layer 360 to protect the touch electrode layer 360, and may be an insulating material. Among them, the above-mentioned stacked structure of the touch screen can be applied to a flexible touch screen. The substrate 310 and the packaging layer 350 are flexible structures, preferably using flexible films.
請參考圖4，為本申請提供之一種習知之觸控屏上行信號之示意圖。其中，該觸控屏300包括上述觸控電極層360中之驅動電極所組成之第一上行信號發送通道TX1、TX2、TX3、TX4、TX5以及TX6，接收電極所組成之第二上行信號發送通道RX1、RX2、RX3、RX4、RX5、RX6、RX7以及RX8。習知技術中之觸控屏300於傳輸上行信號至主動筆時，會以相同之載波信號驅動所有第一上行信號發送通道以及第二上行信號發送通道，即於所有之觸控電極上驅動相同之載波信號。 Please refer to FIG. 4 , which is a schematic diagram of a conventional touch screen uplink signal provided by the present application. The touch screen 300 includes first uplink signal transmission channels TX1, TX2, TX3, TX4, TX5 and TX6 composed of the driving electrodes in the touch electrode layer 360, and a second uplink signal transmission channel composed of the receiving electrodes. RX1, RX2, RX3, RX4, RX5, RX6, RX7 and RX8. When the touch screen 300 in the conventional technology transmits the uplink signal to the active pen, it will drive all the first uplink signal transmission channels and the second uplink signal transmission channel with the same carrier signal, that is, the same carrier wave signal will be driven on all the touch electrodes. the carrier signal.
然而，上述之該種層疊結構之觸控屏，其封裝層350隔絕了陰極層340以及觸控電極層360，會使陰極層340以及觸控電極層360於封裝層350中形成非常大之寄生電容，如圖3中之Ctx為驅動電極與陰極層340形成之寄生電容，而Crx為接收電極與陰極層340形成之寄生電容，Cp1係主動筆與驅動電極形成之耦合電容，Cp2係主動筆與接收電極形成之耦合電容，Cm係驅動電極與接收電極形成之互容電容。如上述圖4中習知技術中之上行信號傳輸方式，由於所有之接收電極以及驅動電極傳輸相同之載波信號，即傳輸相同電壓波形之上行信號，會使寄生電容Ctx以及Crx耦合非常多之電荷至陰極層340。陰極層340中之電極本身存在一定之電阻，因此電荷會使陰極層340產生一定之Ripple電壓。由於陰極層340係發光二極體進行顯示之公共電極，該Ripple電壓(Ripple電壓，波紋電壓)將會影響發光二極體之正常工作，從而影響觸控屏300之顯示效果，例如使觸控屏之畫面顯示水波紋，或者於顯示純色畫面時導致顏色顯示不均勻。即習知技術之傳輸上行信號至主動筆之方法，會影響觸控屏之顯示效果。 However, in the touch screen with the above-mentioned stacked structure, the encapsulation layer 350 isolates the cathode layer 340 and the touch electrode layer 360, which will cause the cathode layer 340 and the touch electrode layer 360 to form a very large parasitic in the encapsulation layer 350. Capacitance, Ctx in Figure 3 is the parasitic capacitance formed by the driving electrode and the cathode layer 340, and Crx is the parasitic capacitance formed by the receiving electrode and the cathode layer 340, Cp1 is the coupling capacitance formed by the active pen and the driving electrode, and Cp2 is the active pen The coupling capacitance formed with the receiving electrode, Cm is the mutual capacitance formed by the driving electrode and the receiving electrode. As shown in Figure 4 above, in the conventional uplink signal transmission method, since all the receiving electrodes and driving electrodes transmit the same carrier signal, that is, the uplink signal with the same voltage waveform, the parasitic capacitances Ctx and Crx will couple a lot of charges. to cathode layer 340. The electrodes in the cathode layer 340 themselves have a certain resistance, so the charges will cause the cathode layer 340 to generate a certain Ripple voltage. Since the cathode layer 340 is the common electrode used by the light-emitting diodes for display, the Ripple voltage (ripple voltage) will affect the normal operation of the light-emitting diodes, thereby affecting the display effect of the touch screen 300, such as causing the touch The screen shows water ripples, or causes uneven color display when displaying a solid color screen. That is, the conventional method of transmitting uplink signals to the active pen will affect the display effect of the touch screen.
本申請實施例提供一種信號傳輸方法，應用於觸控屏，或應用於包括有觸控屏之觸控設備，用以使觸控屏於傳輸上行信號至主動筆時，不會影響觸控屏顯示效果。 Embodiments of the present application provide a signal transmission method that is applied to a touch screen or a touch device including a touch screen, so that the touch screen does not affect the touch screen when transmitting uplink signals to the active pen. Display effect.
請參考圖5，為本申請實施例提供之一種信號傳輸方法之流程示意圖。其中，該信號傳輸方法應用於觸控屏，或應用於包括有觸控屏之觸控設備，觸控屏包括觸控電極，該方法包括： Please refer to FIG. 5 , which is a schematic flowchart of a signal transmission method provided by an embodiment of the present application. Wherein, the signal transmission method is applied to a touch screen or a touch device including a touch screen. The touch screen includes touch electrodes. The method includes:
步驟S51：獲取觸控筆於觸控屏上之當前觸點。 Step S51: Obtain the current contact point of the stylus on the touch screen.
本申請實施例中，上述觸控設備包括手機、平板電腦以及筆記型電腦等包括有觸控屏之電子設備，使用者藉由手指或者觸控筆等點擊觸控屏，或者於觸控屏上進行滑動操作，從而與電子設備進行人機交互。其中，該觸控 屏中包括有觸控電極，觸控電極分為接收電極以及驅動電極，其詳細之結構以及原理性之說明可以參考前述圖1至圖3以及相應之內容，這裡不再贅述。 In the embodiment of the present application, the above-mentioned touch devices include mobile phones, tablet computers, notebook computers and other electronic devices including touch screens. The user clicks on the touch screen with a finger or a stylus, or clicks on the touch screen. Perform sliding operations to interact with electronic devices. Among them, the touch The screen includes touch electrodes, which are divided into receiving electrodes and driving electrodes. For detailed structure and principle description, please refer to the aforementioned Figures 1 to 3 and the corresponding content, and will not be repeated here.
其中，上述當前觸點即觸控筆之筆尖於觸控屏上之位置。當觸控筆之筆尖接觸觸控屏時，觸點位置上之觸控電極將會產生電荷資訊，觸控屏之觸控晶片藉由獲取之觸控電極之電荷資訊，根據該電荷資訊計算出當前觸點之位置，即計算出觸點於觸控屏上之座標。該觸控筆為主動筆時，可以藉由筆尖傳輸下行型號至觸點位置上之觸控電極，藉由下行信號可以進一步提高獲取當前觸點之準確度，以及使觸控屏可以區分手指以及觸控筆。 Wherein, the above-mentioned current contact point is the position of the tip of the stylus on the touch screen. When the tip of the stylus touches the touch screen, the touch electrode at the contact point will generate charge information. The touch chip of the touch screen obtains the charge information of the touch electrode and calculates a calculation based on the charge information. The current position of the touch point is calculated as the coordinates of the touch point on the touch screen. When the stylus is an active pen, it can transmit the downward signal to the touch electrode at the contact position through the pen tip. The downward signal can further improve the accuracy of obtaining the current contact point, and the touch screen can distinguish between fingers and Stylus.
步驟S52：根據當前觸點確定所述觸控屏上之第一區域及第二區域，第一區域包括當前觸點，第一區域以及第二區域均不重疊。 Step S52: Determine the first area and the second area on the touch screen according to the current touch point. The first area includes the current touch point, and the first area and the second area do not overlap.
本申請實施例中，觸控屏於獲取到當前觸點後，亦即獲取到觸控筆之筆尖位於觸控屏上之座標後，觸控屏將根據該座標劃分出觸控屏上之第一區域、第二區域。其中，第一區域包括當前觸點，即該第一區域之面積要大於當前觸點之面積，以便於完全將當前觸點包括於裡面，於藉由第一區域傳輸上行信號至觸控筆時，可以提高其信號傳輸之信噪比。 In the embodiment of the present application, after the touch screen obtains the current touch point, that is, after obtaining the coordinates of the tip of the stylus on the touch screen, the touch screen will divide the first point on the touch screen based on the coordinates. First area, second area. Among them, the first area includes the current contact point, that is, the area of the first area is larger than the area of the current contact point, so as to completely include the current contact point inside, when the uplink signal is transmitted to the stylus through the first area. , which can improve the signal-to-noise ratio of its signal transmission.
而第一區域以及第二區域不重疊，即第一區域以及第二區域中之第一上行信號發送通道與第二上行信號發送通道均不相同，第一上行信號發送通道由其中一列驅動電極組成，第二上行信號發送通道由其中一行接收電極組成，具體之第一上行信號發送通道與第二上行信號發送通道之示例可以參考前述之圖4以及相應之內容。 The first area and the second area do not overlap, that is, the first uplink signal transmission channel and the second uplink signal transmission channel in the first area and the second area are different, and the first uplink signal transmission channel is composed of one column of driving electrodes. , the second uplink signal transmission channel is composed of one row of receiving electrodes. For specific examples of the first uplink signal transmission channel and the second uplink signal transmission channel, please refer to the aforementioned Figure 4 and the corresponding content.
步驟S53：控制第一區域之觸控電極傳輸上行信號，控制第二區域之觸控電極傳輸反相信號。 Step S53: Control the touch electrodes in the first area to transmit uplink signals, and control the touch electrodes in the second area to transmit inverse signals.
其中，上行信號用以傳輸至觸控筆，以與觸控筆進行通信，反相信號之相位與上行信號之相位相反。 Among them, the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is opposite to the phase of the uplink signal.
本申請實施例中，觸控屏將於第一區域之觸控電極上驅動上行信號，即藉由觸控晶片向第一區域之觸控電極傳輸上行信號，由於此時觸控筆之筆尖觸點於第一區域內，因此觸控筆可以接收到該上行信號，從而完成觸控屏向觸控筆之通信。 In the embodiment of the present application, the touch screen will drive the uplink signal on the touch electrode in the first area, that is, transmit the uplink signal to the touch electrode in the first area through the touch chip, because the tip of the stylus touches the Click in the first area, so the stylus can receive the uplink signal, thereby completing communication from the touch screen to the stylus.
與此同時，觸控屏將於第二區域之觸控電極上驅動反相信號，該反相信號之相位與上行信號之相位相反，即該反相信號同樣會導致觸控屏之陰極層產生一定之電壓，具體原理性說明可以參考前述內容。因此，載入有上行信號之通道耦合到陰極層之電荷量跟載入有反相信號之通道耦合到陰極層之電荷量能夠接近抵消，最大限度地減輕了觸控對顯示之干擾。假設同一時間上行信號導致觸控屏之陰極層產生第一電壓，反相信號導致觸控屏之陰極層產生第二電壓，第一電壓與第二電壓於同一時間段內之相位亦係相反的，因此可以相互抵消，使觸控屏於傳輸上行信號時，不會影響顯示效果。並且，相比於全屏之觸控電極去傳輸上行信號，分區域載入信號之功率更低。 At the same time, the touch screen will drive an inverted signal on the touch electrode in the second area. The phase of the inverted signal is opposite to the phase of the uplink signal. That is, the inverted signal will also cause the cathode layer of the touch screen to generate A certain voltage, please refer to the above content for specific principle explanation. Therefore, the amount of charge coupled to the cathode layer from the channel loaded with the uplink signal and the amount of charge coupled to the cathode layer from the channel loaded with the reverse signal can be nearly offset, minimizing the interference of touch on the display. Assume that at the same time, the uplink signal causes the cathode layer of the touch screen to generate a first voltage, and the inverted signal causes the cathode layer of the touch screen to generate a second voltage. The phases of the first voltage and the second voltage in the same time period are also opposite. , so they can cancel each other out, so that the touch screen will not affect the display effect when transmitting uplink signals. Moreover, compared to using full-screen touch electrodes to transmit uplink signals, the power of loading signals in sub-regions is lower.
具體原理性說明如下： The specific principle explanation is as follows:
請參考圖6，圖6為本申請實施例提供之一種觸控屏中之信號對比圖，圖中包括上行信號V，觸控電極與陰極層之間之寄生電容之電流信號I，以及上行信號導致陰極層產生之電壓信號V(Cathode)。可以發現，當上行信號傳輸到觸控電極上，由於觸控電極與陰極層之間存在寄生電容，於上行信號V之上升沿階段，電流信號I會透過寄生電容耦合到陰極層上，電流信號I之方向為從觸控電極流到陰極層上(正向電流)，由於陰極層存在電阻，該電流信號I會透過陰極層之電阻流到陰極層之驅動端，從而於陰極層形成正向電壓。同理，於上行信號V之下降沿階段，則電流信號I之方向為從陰極層流到觸控電極(反向電流)，從而於陰極層形成反向電壓。 Please refer to Figure 6. Figure 6 is a signal comparison diagram in a touch screen according to an embodiment of the present application. The figure includes an uplink signal V, a current signal I of the parasitic capacitance between the touch electrode and the cathode layer, and an uplink signal. Resulting in the voltage signal V (Cathode) generated by the cathode layer. It can be found that when the uplink signal is transmitted to the touch electrode, due to the parasitic capacitance between the touch electrode and the cathode layer, during the rising edge stage of the uplink signal V, the current signal I will be coupled to the cathode layer through the parasitic capacitance. The direction of I is from the touch electrode to the cathode layer (forward current). Due to the resistance of the cathode layer, the current signal I will flow through the resistance of the cathode layer to the driving end of the cathode layer, thereby forming a forward current on the cathode layer. voltage. Similarly, during the falling edge stage of the uplink signal V, the direction of the current signal I is from the cathode layer to the touch electrode (reverse current), thereby forming a reverse voltage on the cathode layer.
而於同一時間裡面，於第二區域之觸控電極上驅動反相信號，即於上行信號為上升沿階段時，該反相信號為下降沿階段，而於上行信號為下降沿階段時，該反相信號為上升沿階段，則上行信號耦合到陰極層之電流信號與反相信號耦合到陰極層之電流信號互相抵消，從而使陰極層消除上行信號傳輸時所導致之電壓，從而使觸控屏於傳輸上行信號時，減輕了對顯示效果之干擾。 At the same time, an inverted signal is driven on the touch electrode in the second area. That is, when the uplink signal is in the rising edge stage, the inverted signal is in the falling edge stage, and when the uplink signal is in the falling edge stage, the inverted signal is driven in the falling edge stage. When the inverse signal is in the rising edge stage, the current signal coupled by the uplink signal to the cathode layer and the current signal coupled by the inverse signal to the cathode layer cancel each other out, so that the cathode layer eliminates the voltage caused by the uplink signal transmission, thereby making the touch The screen reduces interference to the display effect when transmitting uplink signals.
其中，上行信號之等效電荷量等於反相信號之等效電荷量。即為滿足上行信號能與反相信號之電荷抵消原則，於第一區域之所有觸控電極上傳輸之上行信號之等效電荷，與第二區域之所有觸控電極上傳輸之反相信號之等效電荷相等。為滿足該電荷抵消原則，本申請提出以下幾種方案： Among them, the equivalent charge amount of the uplink signal is equal to the equivalent charge amount of the inverted signal. That is, in order to satisfy the charge cancellation principle of the uplink signal energy and the inverted signal, the equivalent charge of the uplink signal transmitted on all the touch electrodes in the first area is equal to the equivalent charge of the inverted signal transmitted on all the touch electrodes in the second area. The equivalent charges are equal. In order to satisfy this charge cancellation principle, this application proposes the following solutions:
請參考圖7，為本申請實施例提供之一種觸控屏驅動上行信號之示意圖。其中，該觸控屏700包括觸控電極層中之驅動電極所組成之第一信號通道TX1、TX2、TX3、TX4、TX5以及TX6，接收電極所組成之第二信號通道RX1、RX2、RX3、RX4、RX5、RX6、RX7以及RX8。可以理解之係，該驅動電極藉由協議控制，於傳輸載波信號以及傳輸上行信號之間切換，即分時複用，同理，該接收電極亦藉由協議控制，於接收載波信號以及傳輸上行信號之間切換。 Please refer to FIG. 7 , which is a schematic diagram of a touch screen driving uplink signal according to an embodiment of the present application. Among them, the touch screen 700 includes first signal channels TX1, TX2, TX3, TX4, TX5 and TX6 composed of driving electrodes in the touch electrode layer, and second signal channels RX1, RX2, RX3 composed of receiving electrodes. RX4, RX5, RX6, RX7 and RX8. It can be understood that the driving electrode is controlled by the protocol to switch between transmitting the carrier signal and transmitting the uplink signal, that is, time division multiplexing. Similarly, the receiving electrode is also controlled by the protocol to receive the carrier signal and transmit the uplink signal. Switch between signals.
本申請實施例中，如圖7所示，為滿足上述電荷抵消原則，觸控屏700可以藉由控制第二區域720之第一信號通道與第二信號通道之數量，大於第一區域710之第一信號通道與第二信號通道之數量，而上行信號之電壓幅度大於反相信號之電壓幅度。即觸控屏700於劃分區域時，控制第二區域720之觸控電極之數量大於第一區域710之觸控電極之數量，上行信號之電壓幅度大於反相信號之電壓幅度。 In the embodiment of the present application, as shown in FIG. 7 , in order to satisfy the above charge cancellation principle, the touch screen 700 can control the number of the first signal channel and the second signal channel in the second area 720 to be larger than that in the first area 710 . The number of the first signal channel and the second signal channel, and the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inverted signal. That is, when the touch screen 700 is divided into regions, the number of touch electrodes in the second region 720 is greater than the number of touch electrodes in the first region 710, and the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inverted signal.
其中，以觸控屏700藉由控制傳輸信號之通道數量為例，如圖7中之第一區域710用到信號通道TX5以及RX3，而第二區域720用到信號通道TX1、TX2、RX7以及RX8，即第二區域720之信號通道數量大於第一區域710之信號通 道數量，並且當上行信號之電壓幅度為反相信號之電壓幅度之兩倍時，第二區域720之信號通道數量則為第一區域710之兩倍，從而實現電荷抵消。 Among them, taking the touch screen 700 as an example by controlling the number of channels for transmitting signals, the first area 710 in Figure 7 uses signal channels TX5 and RX3, and the second area 720 uses signal channels TX1, TX2, RX7 and RX8, that is, the number of signal channels in the second area 720 is greater than the number of signal channels in the first area 710. The number of channels, and when the voltage amplitude of the uplink signal is twice the voltage amplitude of the inverted signal, the number of signal channels in the second area 720 is twice that of the first area 710, thereby achieving charge cancellation.
於觸控屏700傳輸上行信號至觸控筆時，為增加上行信號之信噪比，上行信號通常採用電壓幅度較高之信號，例如於觸控屏700中可以設置有電荷泵電路將供電電壓提升至兩倍甚至更高之倍數，去驅動上行信號。與此相反，反相信號則可以採用電壓幅度較低之信號，傳輸至更多之觸控電極或者信號通道以滿足電荷抵消原則，從而可以降低反相信號於驅動時之功耗，從而降低觸控屏700之功耗。 When the touch screen 700 transmits an uplink signal to the stylus, in order to increase the signal-to-noise ratio of the uplink signal, the uplink signal usually uses a signal with a higher voltage amplitude. For example, a charge pump circuit can be provided in the touch screen 700 to convert the supply voltage Increase it to a multiple of twice or even higher to drive upward signals. On the contrary, the inverse signal can use a signal with a lower voltage amplitude and transmit it to more touch electrodes or signal channels to satisfy the charge cancellation principle, thereby reducing the power consumption of the inverse signal when driving, thereby reducing the touch The power consumption of the control screen 700.
請參考圖8，為本申請實施例提供之一種觸控屏驅動上行信號之示意圖。其中，該觸控屏800包括觸控電極層中之驅動電極所組成之第一信號通道TX1、TX2、TX3、TX4、TX5以及TX6，接收電極所組成之第二信號通道RX1、RX2、RX3、RX4、RX5、RX6、RX7以及RX8。 Please refer to FIG. 8 , which is a schematic diagram of a touch screen driving uplink signal according to an embodiment of the present application. Among them, the touch screen 800 includes first signal channels TX1, TX2, TX3, TX4, TX5 and TX6 composed of driving electrodes in the touch electrode layer, and second signal channels RX1, RX2, RX3 composed of receiving electrodes. RX4, RX5, RX6, RX7 and RX8.
本申請實施例中，如圖8所示，為滿足上述電荷抵消原則，觸控屏800可以藉由控制第二區域820之第一信號通道與第二信號通道之數量，少於第一區域810之第一信號通道與第二信號通道之數量，上行信號之電壓幅度小於反相信號之電壓幅度。即觸控屏800於劃分區域時，控制第二區域820之觸控電極之數量少於第一區域810之觸控電極之數量，上行信號之電壓幅度小於反相信號之電壓幅度。 In the embodiment of the present application, as shown in FIG. 8 , in order to satisfy the above charge cancellation principle, the touch screen 800 can control the number of first signal channels and second signal channels in the second area 820 to be less than that in the first area 810 The number of the first signal channel and the second signal channel is such that the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inverted signal. That is, when the touch screen 800 is divided into regions, the number of touch electrodes in the second region 820 is smaller than the number of touch electrodes in the first region 810, and the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inverted signal.
其中，以觸控屏800藉由控制傳輸信號之通道數量為例，如圖8中之第一區域810用到信號通道TX5、TX6、RX2以及RX3，而第二區域820用到信號通道TX1以及RX8，即第二區域820之信號通道數量小於第一區域810之信號通到數量，並且第二區域820之信號通道數量為第一區域810之一半，為滿足電荷抵消原則，則上行信號之電壓幅度則為反相信號之電壓幅值之一半。 Among them, taking the touch screen 800 as an example by controlling the number of channels for transmitting signals, the first area 810 in Figure 8 uses signal channels TX5, TX6, RX2 and RX3, and the second area 820 uses signal channels TX1 and RX3. RX8, that is, the number of signal channels in the second area 820 is less than the number of signal channels in the first area 810, and the number of signal channels in the second area 820 is half of the first area 810. In order to satisfy the charge cancellation principle, the voltage of the uplink signal The amplitude is half the voltage amplitude of the inverted signal.
即本申請實施例中，反相信號還可以採用電壓幅值較高之信號，例如同樣可以於觸控屏800中設置有電荷泵電路將供電電壓提升至兩倍甚至更高之倍數，去驅動反相信號。而電壓幅度較高之反相信號能更快之藉由寄生電容耦合至陰極層，從而更快之抵消上行信號藉由寄生電容耦合至陰極層之電壓，消除對觸控屏顯示之影響。 That is to say, in the embodiment of the present application, the inverse signal can also use a signal with a higher voltage amplitude. For example, a charge pump circuit can also be provided in the touch screen 800 to increase the supply voltage to twice or even a higher multiple to drive the touch screen 800 . Inverse signal. The inverse signal with a higher voltage amplitude can be coupled to the cathode layer through parasitic capacitance faster, thereby more quickly canceling out the voltage of the uplink signal coupled to the cathode layer through parasitic capacitance, eliminating the impact on the touch screen display.
本申請實施例中，上述觸控屏於控制劃分區域時，還可以控制劃分之第一區域與第二區域之間間隔預設距離，係為於第一區域驅動上行信號時，能讓觸控筆接收信噪比較高之上行信號，避免反相信號對上行信號之干擾。而該預設距離具體距離值受不同型號觸控屏或者觸控屏尺寸等因素之影響，藉由試驗可以找出最佳之預設距離，這裡不做限定。於最佳之預設距離下既能降低反向信號對上行信號之干擾，還能以較快之速度消除上行信號傳輸時所導致之陰極層之電壓。 In the embodiment of the present application, when controlling the divided area, the above-mentioned touch screen can also control the preset distance between the divided first area and the second area, so that when the first area drives the uplink signal, the touch screen can The pen receives uplink signals with a high signal-to-noise ratio to avoid interference from inverted signals on uplink signals. The specific distance value of the preset distance is affected by factors such as different models of touch screens or touch screen sizes. The best preset distance can be found through experiments, and there is no limit here. At the optimal preset distance, it can not only reduce the interference of the reverse signal to the uplink signal, but also quickly eliminate the voltage of the cathode layer caused by the transmission of the uplink signal.
本申請實施例中，上述步驟S51中，可以藉由觸控電極接收觸控筆發送之下行信號，根據下行信號獲取當前觸點。該上行信號與下行信號按照預設協定分時傳輸。而上述步驟S52中劃分區域之過程可以建立於觸控屏需要發送上行信號至觸控筆之前提下，即於觸控屏於無需傳輸上行信號至觸控筆時，可以不進行根據觸點進行區域之劃分之過程，從而降低觸控晶片之計算量。 In the embodiment of the present application, in the above-mentioned step S51, the downlink signal sent by the stylus can be received by the touch electrode, and the current contact point can be obtained according to the downlink signal. The uplink signal and the downlink signal are transmitted in a time-sharing manner according to a preset protocol. The process of dividing areas in the above step S52 can be based on the premise that the touch screen needs to send an uplink signal to the stylus. That is, when the touch screen does not need to transmit an uplink signal to the stylus, it does not need to perform processing according to the touch point. The process of dividing areas, thereby reducing the calculation amount of the touch chip.
請參考圖9，圖9為本申請實施例提供之一種信號傳輸方法之流程示意圖。其中，該信號傳輸方法應用於觸控屏，或應用於包括有觸控屏之觸控設備，觸控屏包括觸控電極，該方法包括： Please refer to FIG. 9 , which is a schematic flowchart of a signal transmission method provided by an embodiment of the present application. Wherein, the signal transmission method is applied to a touch screen or a touch device including a touch screen. The touch screen includes touch electrodes. The method includes:
步驟S91：獲取觸控筆於觸控屏上之當前觸點。 Step S91: Obtain the current contact point of the stylus on the touch screen.
此步驟與上述步驟S51一致，於此不再贅述。 This step is consistent with the above-mentioned step S51 and will not be described again.
步驟S92：根據當前觸點確定觸控屏上之第一區域、第二區域以及第三區域，第一區域包括當前觸點，第一區域、第二區域以及第三區域均不重疊。 Step S92: Determine the first area, the second area, and the third area on the touch screen according to the current touch point. The first area includes the current touch point, and the first area, the second area, and the third area do not overlap.
區別於圖5所示之信號傳輸方法，於本申請實施例中還將劃分觸控屏上之第三區域，即該第三區域之第一上行信號發送通道與第二上行信號發送通道與第一區域與第二區域之均不相同，第一上行信號發送通道由其中一列驅動電極組成，第二上行信號發送通道由其中一行接收電極組成，具體之第一上行信號發送通道與第二上行信號發送通道之示例可以參考前述之圖4以及相應之內容。 Different from the signal transmission method shown in Figure 5, in the embodiment of the present application, a third area on the touch screen will also be divided, that is, the first uplink signal transmission channel and the second uplink signal transmission channel of the third area. Each area is different from the second area. The first uplink signal transmission channel is composed of one column of driving electrodes, and the second uplink signal transmission channel is composed of one row of receiving electrodes. Specifically, the first uplink signal transmission channel and the second uplink signal transmission channel are composed of one row of driving electrodes. For examples of sending channels, please refer to the aforementioned Figure 4 and the corresponding content.
步驟S93：控制第一區域之觸控電極傳輸上行信號，控制第二區域之觸控電極傳輸反相信號，及控制第三區域之觸控電極接地。 Step S93: Control the touch electrodes in the first area to transmit uplink signals, control the touch electrodes in the second area to transmit inverse signals, and control the touch electrodes in the third area to be grounded.
其中，上行信號用以傳輸至觸控筆，以與觸控筆進行通信，反相信號之相位與上行信號之相位相反。 Among them, the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is opposite to the phase of the uplink signal.
本申請實施例中，藉由控制第三區域之觸控電極進行接地，可以將寄生電容之電荷快速引入接地端，從而可以有效降低陰極層產生之電壓量，從而進一步降低上行信號對觸控屏顯示效果之影響，及降低功率。其中，該寄生電容為觸控屏中觸控電極與陰極層之間之寄生電容。 In the embodiment of the present application, by controlling the touch electrode in the third area to be grounded, the charge of the parasitic capacitance can be quickly introduced into the ground terminal, thereby effectively reducing the amount of voltage generated by the cathode layer, thereby further reducing the impact of uplink signals on the touch screen. Display effect, and reduce power. Wherein, the parasitic capacitance is the parasitic capacitance between the touch electrode and the cathode layer in the touch screen.
其中，該第三區域可以劃分於第一區域之附近，以快速將第一區域上之寄生電容之電荷引入接地端。以及上述第三區域還可以為所述觸控屏上除該第一區域及該第二區域之剩餘區域。即將無需進行傳輸上行信號以及反向信號之信號通道控制接地，能更好之將整個觸控屏上之波紋電壓進行接地。 The third area can be divided near the first area to quickly introduce the charge of the parasitic capacitance on the first area into the ground terminal. And the above-mentioned third area may also be the remaining area on the touch screen except the first area and the second area. There will be no need to control the grounding of the signal channel for transmitting uplink signals and reverse signals, and the ripple voltage on the entire touch screen can be better grounded.
作為一種優選之實施例，於確定第一區域、第二區域以及第三區域時，第二區域之觸控電極之數量等於第一區域之觸控電極之數量，上行信號之電壓幅度等於反相信號之電壓幅度。即反相信號則可以採用電壓幅度較低之信 號，藉由傳輸至更多之觸控電極或者信號通道以滿足電荷抵消原則，從而可以降低反相信號於驅動時之功耗，從而降低觸控屏之功耗。 As a preferred embodiment, when determining the first area, the second area and the third area, the number of touch electrodes in the second area is equal to the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is equal to the inverse phase The voltage amplitude of the signal. That is, the inverted signal can use a signal with a lower voltage amplitude. By transmitting the signal to more touch electrodes or signal channels to satisfy the charge cancellation principle, the power consumption of the reverse signal during driving can be reduced, thereby reducing the power consumption of the touch screen.
或者，第二區域之觸控電極之數量大於第一區域之觸控電極之數量，上行信號之電壓幅度大於反相信號之電壓幅度。即藉由電壓幅度較高之反相信號能更快之藉由寄生電容耦合至陰極層，從而更快之抵消上行信號藉由寄生電容耦合至陰極層之電壓，消除對觸控屏顯示之影響。 Alternatively, the number of touch electrodes in the second area is greater than the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inverted signal. That is, the inverse signal with a higher voltage amplitude can be coupled to the cathode layer through parasitic capacitance faster, thereby more quickly canceling out the voltage of the uplink signal coupled to the cathode layer through parasitic capacitance, eliminating the impact on the touch screen display. .
或者，第二區域之觸控電極之數量少於第一區域之觸控電極之數量，上行信號之電壓幅度小於反相信號之電壓幅度。 Alternatively, the number of touch electrodes in the second area is less than the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inverted signal.
請參考圖10，為本申請實施例提供之一種觸控屏驅動上行信號之示意圖。其中，該觸控屏1000包括觸控電極層中之驅動電極所組成之第一信號通道TX1、TX2、TX3、TX4、TX5以及TX6，接收電極所組成之第二信號通道RX1、RX2、RX3、RX4、RX5、RX6、RX7以及RX8。觸控屏1000確定第一區域1010、第二區域1020以及第三區域1030。 Please refer to FIG. 10 , which is a schematic diagram of a touch screen driving uplink signal according to an embodiment of the present application. Among them, the touch screen 1000 includes first signal channels TX1, TX2, TX3, TX4, TX5 and TX6 composed of driving electrodes in the touch electrode layer, and second signal channels RX1, RX2, RX3 composed of receiving electrodes. RX4, RX5, RX6, RX7 and RX8. The touch screen 1000 determines a first area 1010, a second area 1020, and a third area 1030.
本申請實施例中，如圖10所示，為滿足上述電荷抵消原則，觸控屏900可以藉由控制第二區域1020之第一信號通道與第二信號通道之數量，等於第一區域1010之第一信號通道與第二信號通道之數量，上行信號之電壓幅度等於反相信號之電壓幅度。即觸控屏800於劃分區域時，控制第二區域1020之觸控電極之數量等於第一區域1010之觸控電極之數量，上行信號之電壓幅度等於反相信號之電壓幅度。 In the embodiment of the present application, as shown in FIG. 10 , in order to satisfy the above charge cancellation principle, the touch screen 900 can control the number of the first signal channel and the second signal channel in the second area 1020 to be equal to the number of the first signal channel in the first area 1010 . The number of the first signal channel and the second signal channel, the voltage amplitude of the uplink signal is equal to the voltage amplitude of the inverted signal. That is, when the touch screen 800 is divided into regions, the number of touch electrodes in the second region 1020 is equal to the number of touch electrodes in the first region 1010, and the voltage amplitude of the uplink signal is equal to the voltage amplitude of the inverted signal.
其中，以觸控屏1000藉由控制傳輸信號之通道數量為例，如圖10中之第一區域1010用到信號通道TX5、TX6、RX2以及RX3，而第二區域920用到信號通道TX1、TX2、RX7以及RX8，即第二區域1020之信號通道數量等於第一區域1010之信號通到數量，為滿足電荷抵消原則，則上行信號之電壓幅度等於反相信號之電壓幅值。 Among them, taking the touch screen 1000 as an example by controlling the number of channels for transmitting signals, the first area 1010 in Figure 10 uses signal channels TX5, TX6, RX2 and RX3, while the second area 920 uses signal channels TX1, TX2, RX7 and RX8, that is, the number of signal channels in the second area 1020 is equal to the number of signal channels in the first area 1010. In order to satisfy the charge cancellation principle, the voltage amplitude of the uplink signal is equal to the voltage amplitude of the inverted signal.
即本申請實施例中，相比於上述兩種實施例，無需於觸控屏1000中再設置電荷泵電路去提升供電電壓之倍數，從而降低觸控屏1000之製造成本，以及降低對觸控1000之控制晶片要求。 That is to say, in the embodiment of the present application, compared with the above two embodiments, there is no need to set up a charge pump circuit in the touch screen 1000 to increase the multiple of the supply voltage, thereby reducing the manufacturing cost of the touch screen 1000 and reducing the need for touch control. 1000 control chip requirements.
請參考圖11，圖11為本申請實施例提供之一種信號傳輸方法之流程示意圖。該信號傳輸方法包括步驟S111~S114，其中，步驟S111~S113與圖9中之步驟S91~S93相同或類似，具體可參閱圖5中給有關步驟S91~S93之描述，於此不再贅述。可以理解，圖11所示之信號傳輸方法與圖9所示之信號傳輸方法相比，其區別在於，圖11所示之信號傳輸方法還包括步驟S114。 Please refer to FIG. 11 , which is a schematic flowchart of a signal transmission method provided by an embodiment of the present application. The signal transmission method includes steps S111 to S114, wherein steps S111 to S113 are the same as or similar to steps S91 to S93 in Figure 9. For details, please refer to the description of steps S91 to S93 in Figure 5, which will not be described again here. It can be understood that the difference between the signal transmission method shown in Figure 11 and the signal transmission method shown in Figure 9 is that the signal transmission method shown in Figure 11 also includes step S114.
步驟S114：控制觸控屏上之第四區域之觸控電極傳輸觸控信號，觸控信號用以檢測觸控操作，第四區域為觸控屏上除第一區域、第二區域以及第三區域之剩餘區域。 Step S114: Control the touch electrodes in the fourth area on the touch screen to transmit touch signals. The touch signals are used to detect touch operations. The fourth area is the first area, the second area and the third area on the touch screen. The remainder of the area.
本申請實施例中，對於剩餘之第四區域，觸控屏可以傳輸觸控信號，使該第四區域於觸控屏傳輸上行信號至觸控筆期間，還可以檢測其它觸控操作，例如還可以檢測用戶之手指觸控操作。即可以使觸控屏於傳輸上行信號期間，不影響其它協同之觸控操作檢測之準確度，從而提高用戶之體驗度。其中，該觸控信號之具體原理性說明可以參考前述圖1以及相應內容之說明，於此不再贅述。 In the embodiment of the present application, for the remaining fourth area, the touch screen can transmit a touch signal, so that the fourth area can also detect other touch operations during the period when the touch screen transmits the uplink signal to the stylus, such as Can detect user's finger touch operations. That is, the touch screen can not affect the accuracy of other coordinated touch operation detections during the period of transmitting uplink signals, thereby improving the user experience. For the specific principle description of the touch signal, please refer to the aforementioned FIG. 1 and the description of the corresponding content, and will not be described again here.
請參考圖12，圖12為本申請實施例提供之一種觸控屏之結構示意圖，該觸控屏1200包括觸控晶片1210，以及與觸控晶片1210連接之觸控電極1220。觸控晶片1210，用以獲取觸控筆於觸控屏上之當前觸點，以及根據當前觸點確定觸控屏1200上之第一區域以及第二區域，第一區域包括當前觸點，第一區域以及第二區域均不重疊，以及控制第一區域之觸控電極1220傳輸上行信號，控制第二區域之觸控電極1220傳輸反相信號。
Please refer to FIG. 12 , which is a schematic structural diagram of a touch screen according to an embodiment of the present application. The
其中，上行信號用以傳輸至觸控筆，以與觸控筆進行通信，反相信號之相位與上行信號之相位相反。第二區域之觸控電極之數量大於第一區域之觸控電極之數量，上行信號之電壓幅度大於反相信號之電壓幅度。或者，第二區域之觸控電極之數量少於第一區域之觸控電極之數量，上行信號之電壓幅度小於反相信號之電壓幅度。觸控屏1200包括依次設置之基板、陽極層、發光二極體層、陰極層、封裝層、觸控電極層以及保護層，封裝層為柔性結構。
Among them, the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is opposite to the phase of the uplink signal. The number of touch electrodes in the second area is greater than the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is greater than the voltage amplitude of the inverted signal. Alternatively, the number of touch electrodes in the second area is less than the number of touch electrodes in the first area, and the voltage amplitude of the uplink signal is smaller than the voltage amplitude of the inverted signal. The
本申請實施例中，觸控晶片1210將於第二區域之觸控電極1220上驅動反相信號，該反相信號之相位與上行信號之相位相反，即於同一時間上行信號導致觸控屏1200之陰極層產生第一電壓，反相信號導致觸控屏1200之陰極層產生第二電壓，第一電壓與第二電壓於同一時間段內之相位亦係相反的，因此可以相互抵消，從而使觸控屏1200於驅動上行信號時，不會影響觸控屏1200顯示效果。並且，相比於全屏之觸控電極1220去傳輸上行信號，功率更低。
In the embodiment of the present application, the
而觸控晶片1210藉由控制第三區域之觸控電極1220進行接地，可以將寄生電容之電荷快速引入接地端，從而可以有效降低陰極層產生之電壓量，從而進一步降低上行信號對觸控屏1200顯示效果之影響。其中，該寄生電容為觸控屏1200中觸控電極與陰極層之間之寄生電容。
The
本申請實施例還提供另一種觸控屏，該觸控屏包括觸控晶片，以及與觸控晶片連接之觸控電極。 An embodiment of the present application also provides another touch screen, which includes a touch chip and touch electrodes connected to the touch chip.
與上述圖12之觸控屏1200區別在於，觸控晶片，用以獲取觸控筆於觸控屏上之當前觸點，以及根據當前觸點確定觸控屏上之第一區域、第二區域以及第三區域，第一區域包括當前觸點，第一區域、第二區域以及第三區域均不重疊，以及控制第一區域之觸控電極傳輸上行信號，控制第二區域之觸控電極傳輸反相信號，及控制第三區域之觸控電極接地。
The difference from the
其中，上行信號用以傳輸至觸控筆，以與觸控筆進行通信，反相信號之相位與上行信號之相位相反。觸控屏包括依次設置之基板、陽極層、發光二極體層、陰極層、封裝層、觸控電極層以及保護層，封裝層為柔性結構。 Among them, the uplink signal is used to transmit to the stylus to communicate with the stylus, and the phase of the inverted signal is opposite to the phase of the uplink signal. The touch screen includes a substrate, an anode layer, a light-emitting diode layer, a cathode layer, an encapsulation layer, a touch electrode layer and a protective layer arranged in sequence. The encapsulation layer is a flexible structure.
本申請實施例還提供了一種電腦存儲介質，該電腦存儲介質存儲有電腦程式，當該電腦程式被處理器執行時，使處理器執行上述之信號傳輸方法。即該電腦存儲介質還可以設置於觸控筆配套之插接硬體中，該插接硬體用以連接至觸控屏設備之介面，以使觸控屏設備運行該電腦程式，從而使該觸控屏設備之處理器執行上述之信號傳輸方法。 Embodiments of the present application also provide a computer storage medium, which stores a computer program. When the computer program is executed by a processor, the processor is caused to execute the above-mentioned signal transmission method. That is, the computer storage medium can also be installed in the plug-in hardware provided with the stylus. The plug-in hardware is used to connect to the interface of the touch screen device, so that the touch screen device runs the computer program, thereby enabling the touch screen device to run the computer program. The processor of the touch screen device executes the above signal transmission method.
於上述實施例中，可以全部或部分地藉由軟體、硬體、固件或者其任意組合來實現。當使用軟體實現時，可以全部或部分地以電腦程式產品之形式實現。所述電腦程式產品包括一個或多個電腦指令。於電腦上載入與執行所述電腦程式指令時，全部或部分地產生按照本申請實施例所述之流程或功能。所述電腦可為通用電腦、專用電腦、電腦網路、或者其他可程式設計裝置。所述電腦指令可以存儲於電腦存儲介質中，或者藉由所述電腦存儲介質進行傳輸。所述電腦指令可以從一個網站網站、電腦、伺服器或資料中心藉由有線(例如同軸電纜、光纖、數位用戶線路(Digital Subscriber Line，DSL))或無線(例如紅外、無線、微波等)方式向另一個網站網站、電腦、伺服器或資料中心進行傳輸。所述電腦存儲介質可為電腦能夠存取之任何可用介質或者係包含一個或多個可用介質集成之伺服器、資料中心等資料存放裝置。所述可用介質可為磁性介質，(例如，軟碟、硬碟、磁帶)、光介質(例如，數位多功能光碟(Digital Versatile Disc，DVD))、或者半導體介質(例如，固態硬碟(solid state disk，SSD))等。 In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted via the computer storage medium. The computer instructions can be transmitted from a website, computer, server or data center via wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) Transmit to another website, computer, server or data center. The computer storage medium can be any available medium that can be accessed by the computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The usable media may be magnetic media (for example, floppy disks, hard disks, tapes), optical media (for example, Digital Versatile Disc (DVD)), or semiconductor media (for example, solid state drives) state disk, SSD)), etc.
本領域普通技術人員可以理解實現上述實施例方法中之全部或部分流程，可以藉由電腦程式來指令相關之硬體來完成，該程式可存儲於電腦可讀 取存儲介質中，該程式於執行時，可包括如上述各方法之實施例之流程。而前述之存儲介質包括：ROM、RAM、磁碟或者光碟等各種可存儲程式碼之介質。於不衝突之情況下，本實施例與實施方案中之技術特徵可以任意組合。 Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through computer programs. The programs can be stored in computer-readable files. When the program is retrieved from the storage medium and executed, it may include the processes of the embodiments of the above methods. The aforementioned storage media include: ROM, RAM, magnetic disks, optical disks and other media that can store program codes. As long as there is no conflict, the technical features in this embodiment and the implementation plan can be combined arbitrarily.
以上所述之實施例僅僅係本申請之優選實施例方式進行描述，並非對本申請之範圍進行限定，於不脫離本申請之設計精神之前提下，本領域普通技術人員對本申請之技術方案作出之各種變形及改進，均應落入本申請之請求項書確定之保護範圍內。 The above-described embodiments are only descriptions of preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, those of ordinary skill in the art can make adjustments to the technical solutions of the present application. Various deformations and improvements should fall within the scope of protection specified in the request of this application.
S51~S53:步驟 S51~S53: steps
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| US20170285771A1 (en) * | 2016-01-28 | 2017-10-05 | Lg Display Co., Ltd. | Active stylus pen and touch sensing system including the same |
| CN111356974A (en) * | 2017-11-01 | 2020-06-30 | 株式会社和冠 | Position detection system and touch sensor |
| TWM585930U (en) * | 2018-08-24 | 2019-11-01 | 開曼群島商敦泰電子有限公司 | Touch display panel and touch driving circuit |
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