Driving method of pressure touch and related touch display system

Abstract

The present application discloses a pressure touch driving method for a touch display system, wherein the touch display system includes a display panel and a plurality of touch sensing electrodes, and the driving method includes: within a first time interval, the plurality of touch sensing electrodes perform touch sensing according to a touch driving signal and a touch sensing signal; and within a second time interval, the plurality of scanning driving signals of the display panel are used as pressure touch driving signals to drive the plurality of touch sensing electrodes to perform pressure touch sensing.

Description

Technical Field

[0001] The present application relates to a pressure touch driving method and a related touch display system, and more particularly to a pressure touch driving method and a related touch display system that do not require the addition of additional components to perform pressure touch sensing. Background Art

[0002] With the advancement and development of touch technology, touch displays have been widely used in various electronic devices, such as mobile phones, tablet computers, personal digital assistants, laptop computers and other non-mobile display devices, etc., replacing traditional keyboards and mice with touch sensing technology to achieve a more intuitive human-computer interface. Among them, pressure touch technology combines the touch information from the original two-dimensional coordinates of the touch display with the touch force, providing a new dimension of human-computer interface.

[0003] Existing pressure touch technologies all require additional pressure touch components and driver chips to perform pressure touch sensing. In this case, as information has increasingly higher requirements on the thickness and quality of existing mobile devices, if additional pressure touch sensing components are added to the original touch display architecture, it will cause a burden on the process, yield and cost. For example, if the pressure touch sensing electrode terminal (RX) is made into a film to be integrated into the backlight module, and a transparent conductive film is plated on the back of the display backplane, or a transparent conductive film is attached as the driving electrode terminal (TX), then additional RX and TX processes are required during the process stage, which not only increases the thickness of the touch display, but also causes yield problems for the touch display.

[0004] Therefore, under the existing touch technology architecture, how to reduce the process cost and reduce the thickness of the entire touch display has become an issue that the industry is eager to explore. Summary of the invention

[0005] In order to solve the above-mentioned problem, the present application provides a pressure touch driving method and a related touch display system, which can perform pressure touch sensing without additionally disposing a pressure touch element.

[0006] The present application discloses a pressure touch driving method for a touch display system, wherein the touch display system includes a panel and a plurality of touch sensing electrodes, and the driving method includes: in a first time interval, the plurality of touch sensing electrodes perform touch sensing according to a touch driving signal and a touch sensing signal; and in a second time interval, the plurality of scanning driving signals of the display panel are used as pressure touch driving signals to drive the plurality of touch sensing electrodes to perform pressure touch sensing. By applying the pressure touch driving method of the present application, the touch display system does not need to set up additional pressure touch elements, and can perform touch sensing and pressure touch sensing respectively by driving the touch sensing electrodes in different time intervals.

[0007] The present application further discloses a touch display system, comprising a display panel, a plurality of touch sensing electrodes, and a control unit. The display panel comprises a plurality of scan lines, the plurality of scan lines receiving a plurality of scan drive signals; the plurality of touch sensing electrodes coupled to the display panel; the control unit coupled to the plurality of touch sensing electrodes, the control unit controlling the plurality of touch sensing electrodes to perform touch sensing according to the touch drive signal and the touch sensing signal within a first time interval; and the control unit using the plurality of scan drive signals of the display panel as pressure touch drive signals within a second time interval to drive the plurality of touch sensing electrodes to perform pressure touch sensing. When the touch display system of the present application is applied, the touch display system does not need to additionally set up a pressure touch element, and can perform touch sensing and pressure touch sensing respectively by driving the touch sensing electrodes within different time intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 FIG. 1 is a schematic diagram of a touch display system according to an embodiment of the present application.

[0009] Figures 2 to 4 FIG. 4 is a schematic diagram of a driving timing sequence of a touch display system according to an embodiment of the present application.

[0010] Figure 5 Schematic diagram of a driving method according to an embodiment of the present application.

[0011] Figure 6 and Figure 7 FIG. 1 is a schematic diagram of a touch display system according to an embodiment of the present application.

[0012] The reference numerals are described as follows:

[0013] 10,60,70 Touch Display System

[0014] 102 Display Panel

[0015] 104 Touch sensing electrodes

[0016] 106 Control Unit

[0017] 108 Scanning drive circuit

[0018] 602,702 Display thin film transistor substrate

[0019] 604,704 Medium

[0020] 606,706 Color filter substrate

[0021] 708 Touch Panel Substrate

[0022] C1, C2 coupling waveform

[0023] FT RX pressure touch sensing signal

[0024] Gate(n), Gate(n+1),..., Gate(n+39), scan line drive signal

[0025] Gate(n+40),Gate(n+41),Gate(n+42)

[0026] G n ,G n+1 ,...,G n+39 ,G n+40 ,G n+41 ,G n+42 Actuation time

[0027] NP Non-overlapping intervals

[0028] T1 First interval

[0029] T2 Second interval DETAILED DESCRIPTION

[0030] Please refer to Figure 1 , Figure 1Schematic diagram of a touch display system 10 according to an embodiment of the present application. The touch display system 10 includes a display panel 102, a plurality of touch sensing electrodes 104 and a control unit 106. The touch display system 10 may be a touch display with a touch function such as a smart phone or a tablet computer. The display panel 102 may be an out-cell or on-cell touch panel, wherein the display panel 102 may further include a timing control circuit (Timing Controller), a source driver circuit (Source Driver), a scanning driver circuit 108 (Gate Driver), etc., wherein the source driver circuit and the scanning driver circuit 108 drive each pixel of the display panel 102 according to the synchronization signal and control signal of the timing control circuit. The control unit 106 performs touch sensing and pressure touch sensing in different time intervals. That is, the control unit 106 controls the touch sensing electrodes 104 to perform touch sensing according to the touch driving signal (TP TX) and the touch sensing signal (TP RX) in the first time interval; and the control unit 106 uses the multiple scan driving signals of the display panel 102 as the pressure touch driving signals (FT TX) in the second time interval to drive the multiple touch sensing electrodes 104 to perform pressure touch sensing, wherein the scan driving circuit 108 generates the multiple scan driving signals and outputs them to the multiple scan lines of the display panel 102. In this way, the touch display system 10 of the present application can perform touch sensing and pressure touch sensing in a time-sharing manner without additionally setting up pressure touch elements.

[0031] Please refer to Figure 2 , Figure 2Schematic diagram of the driving timing of the touch display system 10 of the present application embodiment. In this exemplary embodiment, the plurality of touch sensing electrodes 104 span across a plurality of pixels in both the horizontal and vertical directions of the display panel 102, wherein the scan driving circuit 108 generates the plurality of scan driving signals Gate(n) to Gate(n+40) and outputs them to the plurality of scan lines, and the actuation time Gn is the time when the scan driving signal Gate(n) is actuated, the actuation time Gn+1 is the time when the scan driving signal Gate(n+1) is actuated, and so on. Furthermore, each of the touch sensing electrodes 104 corresponds to several of the multiple scan lines, and the pressure touch sensing signals FT RX(1) and FT RX(2) are waveforms coupled from the multiple scan driving signals of the multiple scan lines to the multiple touch sensing electrodes 104, wherein the waveform C1 of the pressure touch sensing signal FT RX(1) is a waveform coupled from the multiple scan lines corresponding to the touch sensing electrode 104 being actuated (Gn~Gn+19) by the multiple scan driving signals Gate(n)~Gate(n+19), and the waveform C2 of the pressure touch sensing signal FT RX(2) is a waveform coupled from the multiple scan lines corresponding to the touch sensing electrode 104 being actuated (Gn+20~Gn+39) by the multiple scan driving signals Gate(n+20)~Gate(n+39).

[0032] Re-reference Figure 2 , wherein the first time interval T1 is located in a vertical blanking interval, and the second time interval T2 is located in an effective display period. In the first time interval T1, the plurality of touch sensing electrodes 104 perform touch sensing according to a touch driving signal (TP TX) and a touch sensing signal (TP RX), wherein the plurality of touch sensing electrodes 104 include a plurality of touch driving electrodes and a plurality of touch receiving electrodes. In the first time interval T1, the plurality of touch driving electrodes receive the touch driving signal (TP TX), and the plurality of touch receiving electrodes receive the touch sensing signal (TP RX) to perform touch sensing.

[0033] In the second time interval T2, the plurality of scan driving signals of the display panel 102 are used as pressure touch driving signals to drive the plurality of touch sensing electrodes 104 to perform pressure touch sensing. In one exemplary embodiment, the second time interval T2 is to sample the waveforms coupled from the plurality of scan driving signals Gate(n) to Gate(n+40) of the plurality of scan lines on the plurality of touch sensing electrodes 104. In another exemplary embodiment, the second time interval T2 is sampled by time masking to perform pressure touch sensing in the second time interval T2, wherein each of the touch sensing electrodes 104 corresponds to a plurality of the plurality of scan lines, and the time mask includes the time when the plurality of scan lines corresponding to each of the touch sensing electrodes 104 are actuated (Gn+20 to Gn+39) by the plurality of scan driving signals Gate(n) to Gate(n+40). In another exemplary embodiment, in the second time interval T2, pressure touch sensing is performed by at least one of the plurality of touch driving electrodes or touch receiving electrodes. As a result, the touch display system 10 of the present application does not need to additionally configure a pressure touch element, and can perform touch sensing and pressure touch sensing respectively by driving the touch sensing electrodes 104 in different time intervals.

[0034] It is worth noting that the plurality of scanning drive signals are not limited to Figure 2 The waveform in the display panel 102 will have different scanning drive signals according to different display panels 102, and because the number of pixels spanned by the plurality of touch sensing electrodes 104 is different, the waveform pattern coupled by the actuation, the lengths of the first time interval and the second time interval will also be different. For example, the lengths of the plurality of second intervals T2 can be exactly the same as the intervals of the waveform coupled by the actuation, the touch sensing is not limited to the vertical blanking interval, and the sampling method of the pressure touch sensing is not limited to the time mask, and those skilled in the art can make appropriate modifications accordingly, without limitation thereto.

[0035] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic diagram of another driving timing sequence of the touch display system 10 according to an embodiment of the present application. Figure 3 , the waveforms of the multiple scan drive signals Gate(n) to Gate(n+40) on the multiple scan lines during the effective display period include a non-overlapping area NR, the first time interval T1 is located in the non-overlapping area NR, and the second time interval T2 is located in the effective display period outside the non-overlapping area NR. Further, the non-overlapping area NR may be between the waveforms C1 and C2 coupled out by the multiple scan drive signals Gate(n) to Gate(n+40) of the multiple scan lines on the multiple touch sensing electrodes 104. Figure 3 As shown, the control unit 106 controls the multiple touch sensing electrodes 104 to perform touch sensing according to the touch driving signal (TP TX) and the touch sensing signal (TP RX) in the first time interval T1, and uses the multiple scanning driving signals Gate(n) to Gate(n+40) of the display panel 102 as pressure touch driving signals in the second time interval T2 to drive the multiple touch sensing electrodes 104 to perform pressure touch sensing. In another exemplary embodiment, the first time interval T1 may be located in the vertical blanking interval, and the second time interval T2 is located in the effective display period. In another exemplary embodiment, the second time interval T2 is sampled by time masking to perform pressure touch sensing in the second time interval T2. In this way, the touch display system 10 of the present application does not need to set up additional pressure touch elements, and can perform touch sensing and pressure touch sensing respectively by driving the touch sensing electrodes 104 in different time intervals.

[0036] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of another driving timing sequence of the touch display system 10 according to an embodiment of the present application. Figure 3 The difference is that the non-overlapping area NR may be between the multiple scan drive signal groups, for example, between the multiple scan drive signal groups Gate(n)~Gate(n+40) and the multiple scan drive signal groups Gate(n+41)~Gate(n+42). The first time interval T1 is located in the non-overlapping area NR, and the second time interval T2 is located in the effective display period outside the non-overlapping area NR. In another exemplary embodiment, the first time interval T1 may be located in the vertical blanking interval, and the second time interval T2 is located in the effective display period. In another exemplary embodiment, the second time zone T2 is sampled using a time mask to perform pressure touch sensing within the second time interval T2. In this way, the touch display system 10 of the present application does not need to additionally set up a pressure touch element, and can perform touch sensing and pressure touch sensing in different time intervals by driving the touch sensing electrode 104.

[0037] It should be noted that the above embodiments are used to illustrate the spirit of the present application, and those skilled in the art may make appropriate modifications thereto, and are not limited thereto. Specifically, the first time interval T1 may be located in a pause interval between scan drive signal groups corresponding to each pressure touch sensing signal FT RX, or in a non-overlapping region NR between waveforms C1 and C2 coupled from the touch sensing electrode 104, all of which fall within the scope of the present application.

[0038] The process of performing pressure touch sensing and touch sensing in the touch display system 10 can be summarized as a driving method 50, such as Figure 5 As shown, the driving method 50 can be used for a display panel (such as an electronic product with a display panel, such as a smart phone, a tablet computer, a notebook computer, etc.) and includes the following steps:

[0039] Step 502: Start.

[0040] Step 504: In the first time interval, the plurality of touch sensing electrodes perform touch sensing according to the touch driving signal and the touch sensing signal.

[0041] Step 506: In a second time interval, use the plurality of scan driving signals of the display panel as pressure touch driving signals to drive the plurality of touch sensing electrodes to perform pressure touch sensing.

[0042] Step 508: End.

[0043] In addition, according to different requirements, the touch display system 10 of the present application can be implemented in different embodiments. Figure 6 , Figure 6 FIG. 6 is a schematic diagram of a touch display system 60 according to an embodiment of the present application. Figure 6 As shown, when the touch display system 60 is an external touch panel, the touch display system 60 has a display thin film transistor (TFT) substrate 602, a medium 604 and a color filter substrate (CF substrate) 606. The display thin film transistor substrate 602 can be used as a pressure touch sensing TX terminal; the color filter substrate 606 can be used as a touch sensing RX terminal and a pressure touch sensing RX terminal. In this way, through the deformation of the medium 604, the touch sensing system 60 can perform touch sensing and pressure touch sensing in different time intervals under the touch sensing architecture through the above-mentioned pressure touch driving method 50.

[0044] In another embodiment, please refer to Figure 7 , Figure 7 FIG. 7 is a schematic diagram of a touch display system 70 according to an embodiment of the present application. Figure 7As shown, when the touch display system 70 is an external touch panel, the touch display system 70 has a display thin film transistor substrate 702, a medium 704, a color filter substrate 706 and a touch panel substrate (TP Substrate) 708. Among them, the display thin film transistor substrate 702 can be used as a pressure touch sensing TX terminal; the touch panel substrate 708 can be used as a touch sensing RX terminal and a pressure touch sensing RX terminal. In this way, through the deformation of the medium 704, the touch sensing system 70 can perform touch sensing and pressure touch sensing in different time intervals under the touch sensing architecture through the above-mentioned pressure touch driving method 50.

[0045] It is worth noting that the touch display system of the present application is not limited to application in external touch panels. The above embodiments may also use external touch panels to execute the driving method of the present application, and then use the time-sharing sensing driving method to achieve the goal of integrating touch and pressure touch.

[0046] In summary, the embodiments of the present application do not require additional pressure touch elements, and perform touch sensing and pressure touch sensing in different time intervals in a time-sharing sensing or time-sharing modulation manner, thereby reducing the process cost and the thickness of the overall touch display.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure touch driving method for a touch display system, wherein the touch display system comprises a display panel and a plurality of touch sensing electrodes, and the driving method comprises: In a first time interval, the plurality of touch sensing electrodes perform touch sensing according to a touch driving signal and a touch sensing signal; and In a second time interval, a plurality of scan driving signals of a plurality of scan lines of the display panel are used as pressure touch driving signals to drive the plurality of touch sensing electrodes to perform pressure touch sensing; It is characterized in that The second time interval is used to sample waveforms of the scan driving signals of the scan lines coupled onto the touch sensing electrodes.

2. The driving method according to claim 1, characterized in that: The method comprises generating a plurality of scanning driving signals by a scanning driving circuit and outputting the signals to a plurality of scanning lines of the display panel.

3. The driving method according to claim 1, characterized in that: The first time interval is located in the vertical blanking interval, and the second time interval is located in the effective display period.

4. The driving method according to claim 1, characterized in that: The second time interval is sampled by time masking to perform pressure touch sensing within the second time interval.

5. The driving method according to claim 4, characterized in that: Each of the touch sensing electrodes corresponds to a number of the plurality of scan lines, and the time mask includes the time when the plurality of scan lines corresponding to each of the touch sensing electrodes are actuated by the plurality of scan driving signals.

6. The driving method according to claim 1, characterized in that: The plurality of touch sensing electrodes include a plurality of touch driving electrodes and a plurality of touch receiving electrodes. In the first time interval, the plurality of touch driving electrodes receive the touch driving signal, and the plurality of touch receiving electrodes receive the touch sensing signal to perform touch sensing.

7. The driving method according to claim 6, characterized in that: In the second time interval, pressure touch sensing is performed by at least one of the touch driving electrodes or the touch receiving electrodes.

8. The driving method according to claim 1, characterized in that: The waveforms of the multiple scan driving signals on the multiple scan lines during the effective display period include non-overlapping areas, the first time interval is located in the non-overlapping areas, and the second time interval is an effective display period outside the non-overlapping areas.

9. A touch display system, comprising: A display panel, the display panel comprising a plurality of scan lines, the plurality of scan lines receiving a plurality of scan drive signals; A plurality of touch sensing electrodes coupled to the display panel; as well as A control unit, coupled to the plurality of touch sensing electrodes, wherein the control unit controls the plurality of touch sensing electrodes to perform touch sensing according to a touch driving signal and a touch sensing signal within a first time interval; and the control unit uses the plurality of scan driving signals of the display panel as pressure touch driving signals within a second time interval to drive the plurality of touch sensing electrodes to perform pressure touch sensing; The second time interval is used to sample waveforms of the scan driving signals of the scan lines coupled onto the touch sensing electrodes.

10. The touch display system according to claim 9, characterized in that: The first time interval is located in the vertical blanking interval, and the second time interval is located in the effective display period. 11 . The touch display system according to claim 9 , wherein the second time interval is sampled by time masking to perform pressure touch sensing in the second time interval.

12. The touch display system according to claim 9, characterized in that: The waveforms of the multiple scan driving signals on the multiple scan lines during the effective display period include non-overlapping areas, the first time interval is located in the non-overlapping areas, and the second time interval is an effective display period outside the non-overlapping areas.

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