WO2019178847A1 - 触摸显示驱动方法与触摸显示屏 - Google Patents

触摸显示驱动方法与触摸显示屏 Download PDF

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Publication number
WO2019178847A1
WO2019178847A1 PCT/CN2018/080250 CN2018080250W WO2019178847A1 WO 2019178847 A1 WO2019178847 A1 WO 2019178847A1 CN 2018080250 W CN2018080250 W CN 2018080250W WO 2019178847 A1 WO2019178847 A1 WO 2019178847A1
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WIPO (PCT)
Prior art keywords
touch
period
signal
signal lines
display
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PCT/CN2018/080250
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English (en)
French (fr)
Inventor
吴东光
谭小平
Original Assignee
深圳市柔宇科技有限公司
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Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to EP18910412.8A priority Critical patent/EP3770733A4/en
Priority to CN201880090431.8A priority patent/CN112041797A/zh
Priority to PCT/CN2018/080250 priority patent/WO2019178847A1/zh
Priority to US16/980,733 priority patent/US11243635B2/en
Publication of WO2019178847A1 publication Critical patent/WO2019178847A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch display driving method and a touch display screen.
  • the existing touch display screen mainly adopts a time-division driving method to realize the touch function and the display function.
  • the touch driving circuit and the touch sensing circuit in the touch screen are usually disposed on one side of the touch panel, thereby the touch driving electrodes and the touch sensing electrodes and the touch driving circuit in the touch panel.
  • the distance of the control sensing circuit is not the same.
  • the touch drive electrode row that is far away from the circuit takes the longest time.
  • the duration of each touch period is usually fixed to the length of time required for scanning the touch driving electrode row far away from the touch driving circuit, and is flexible. Poor sex.
  • an embodiment of the present invention provides a touch display driving method and a touch display screen, which can adjust the duration of the touch period of the touch display screen and the duration of the display period, and improve the touch display time-sharing display.
  • an embodiment of the present invention provides a touch display driving method applied to a touch display screen.
  • the touch display screen includes a plurality of first signal lines, a plurality of second signal lines, and a plurality of third signal lines, wherein the touch display screen includes a plurality of consecutive working periods when performing image display and touch operations, each work
  • the time period includes a display period and a touch period, the display period and the touch period do not overlap in time.
  • the touch display driving method includes: driving, during the display period, the plurality of second signal lines and the plurality of third signal lines to perform image signal transmission for image display during any of the working periods; Driving the plurality of first signal lines and at least one of the plurality of second signal lines to form a touch sensing unit to perform touch sensing, wherein the touch
  • the control period includes a detection period and a sensing period. Providing a touch driving signal to at least one of the plurality of second signal lines during the detecting period, and receiving a detecting signal from the plurality of first signal lines, the detecting The measured signal is compared with the preset signal to obtain a comparison result, and the duration of the touch period is increased or decreased according to the comparison result. Providing a touch driving signal to at least one of the plurality of second signal lines during the sensing period, and receiving the sensing signal from the plurality of first signal lines, analyzing the sensing signal to Identify touch operations.
  • an embodiment of the present invention provides a touch display screen including a plurality of first signal lines, a plurality of second signal lines, and a plurality of third signal lines, wherein the touch display screen performs image display and touch operations.
  • the time includes a plurality of consecutive working periods, each of the working periods including a display period and a touch period, the display period and the touch period do not overlap in time.
  • the display circuit is configured to provide a scan driving signal to the plurality of second signal lines during the display period, and provide an image signal to the plurality of third signal lines to enable The plurality of second signal lines are coupled to the third signal line for cooperatively performing image signal transmission for image display.
  • the touch control circuit is configured to provide a touch driving signal to at least one second signal line of the plurality of second signal lines during the touch period, the plurality of first signal lines and the plurality of strips At least one of the second signal lines cooperates to form a touch sensing unit to perform touch sensing.
  • the touch period includes a detection period and a sensing period.
  • the touch control circuit provides a touch drive signal to at least one of the plurality of second signal lines during the detecting period, and receives a detection signal from the plurality of first signal lines, and Comparing the detection signal with the preset signal to obtain a comparison result, so as to increase or decrease the duration of the touch period according to the comparison result.
  • the touch control circuit provides a touch drive signal to at least one of the plurality of second signal lines during the sensing period, and receives the sensing signal from the plurality of first signal lines, and analyzes the The signal is sensed to identify a touch operation.
  • the touch display screen can perform image display and touch sensing in a time-sharing manner in each working period including the display period and the touch period, and will detect during the detection period of the touch period.
  • the signal is compared with the preset signal to obtain a result, and the duration of the touch period and the duration of the display period are adjusted according to the comparison result, the flexibility of the time-division touch display is improved, and the display effect of the touch display screen is improved or The need for touch accuracy.
  • FIG. 1 is a schematic plan view showing a touch display screen according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of the touch circuit shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an operation sequence provided by the touch display screen shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 4 is a schematic flow chart of a touch display driving method provided by the touch display screen shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a specific driving process based on the touch period shown in FIG. 4 according to an embodiment of the present invention.
  • the embodiment of the invention provides a touch display driving method applied to a touch display screen, which is used for displaying an image during a display period, and comparing the detection signal with a preset signal during a detection period in the touch period.
  • the comparison result is not in the first range, the duration of the touch period is increased or detected, the flexibility of the time-division display touch is improved, and the requirement for improving the display effect or the touch precision is satisfied.
  • FIG. 1 is a schematic diagram showing a planar structure of a touch display screen 10 according to an embodiment of the present invention.
  • the touch display screen 10 includes a plurality of scanning areas A1 to AM-AN extending along the first direction x and arranged along the second direction y, where N>M>1, N and M are An integer, the first direction x and the second direction y are perpendicular to each other.
  • Each of the scanning areas Ai is composed of a plurality of second signal lines 12 extending in the first direction x and arranged along the second direction y, 1 ⁇ i ⁇ N.
  • each scan area Ai includes one scan channel Txi
  • each scan channel Txi includes at least one second signal line 12 of the plurality of second signal lines 12.
  • the number of at least one second signal line 12 among the plurality of second signal lines 12 in each of the scanning channels Txi is the same as the arrangement position in each channel.
  • the touch display screen 10 further includes a plurality of first signal lines 11 and third signal lines 13 extending along the second direction y and arranged along the first direction x, wherein the first signal line 11 and the third signal line 13 Insulate each other.
  • the touch display screen 10 further includes a touch circuit 14 , a display circuit 15 , and a timing control circuit 16 .
  • the display circuit 15 is electrically connected to the plurality of second signal lines 12 and the plurality of third signal lines 13 for driving the plurality of second signal lines 12 to perform image signal transmission with the plurality of third signal lines 13 to perform an image. display.
  • the touch circuit 14 is electrically connected to at least one second signal line 12 and the plurality of first signal lines 11 of the plurality of second signal lines 12 for driving at least one second signal line 12 to cooperate with the plurality of first signal lines 11
  • a touch sensing unit (not shown in FIG. 1) is configured to cause the touch display 10 to perform touch sensing.
  • the timing control circuit 16 is electrically connected to the touch circuit 14 and the display circuit 15 to control the working time of the touch circuit 11 and the display circuit 15 and operate in a time-sharing manner, thereby implementing time-sharing image display and touch of the touch display screen 10. Sensing. It should be noted that the touch sensing can at least recognize the position of the touch operation applied on the touch display screen, and of course, the force of application of the touch operation, the application time, and the like can be recognized.
  • the timing control circuit 16 controls the touch control circuit 14 and the display circuit 15 to work in a time-sharing manner: the timing control circuit 16 controls the touch control circuit 14 and the display circuit 15 to perform image display and touch operations during a plurality of consecutive working periods. Each working period includes a display period and a touch period. Correspondingly, the timing control circuit 16 further controls the display circuit 15 to perform image display during the display period and control the touch circuit 14 to perform touch sensing during the touch period. Preferably, the display period and the touch period do not overlap in time.
  • the first signal line 11 is a touch sensing line
  • the second signal line 12 is divided into a scan line and a touch driving line
  • the third signal line 13 is a data line, that is, a touch display.
  • the screen 10 multiplexes the second signal line 12 into a touch driving line in touch sensing and a scanning line in image display.
  • the timing control circuit 16 outputs the first control signal to the display circuit 15 during the display period in any working period, and controls the display circuit 15 to output the scan driving signal and the image through the second signal line 12 and the third signal line 13, respectively.
  • the signal is used to make the touch display 10 in a display state; the timing control circuit 16 also outputs a second control signal to the touch circuit 14 through the second signal line 12 to output the touch driving signal and pass the first
  • the signal line 11 receives the touch sensing signal to place the touch display 10 in a touch sensing state.
  • the display circuit 15 loads the scan driving signal onto the plurality of second signal lines 12, and loads the image signals onto the plurality of third signal lines 13 to match the plurality of second signal lines 12.
  • a plurality of third signal lines 13 are used to cooperate to realize image signal transmission for image display.
  • the touch control circuit 14 sequentially loads the touch driving signal onto at least one second signal line 12 of the plurality of second signal lines 12, and The strip first signal line 11 receives the touch sensing signal.
  • the touch period includes a detection period and a sensing period.
  • the touch control circuit 14 provides a touch drive signal to at least one of the plurality of second signal lines 12 during the detection period, and receives the detection signal from the plurality of first signal lines 11 and detects
  • the comparison signal is compared with the preset signal to obtain a comparison result, and the comparison result is transmitted to the timing control circuit 16, and the timing control unit 16 increases or decreases the duration of the touch period according to the comparison result.
  • the touch control circuit 14 provides a touch driving signal to the at least one second signal line 12 of the plurality of second signal lines 12 during the sensing period, and receives the touch sensing signal from the plurality of first signal lines 11 to analyze the touch.
  • the sensing signal is controlled to identify a touch operation.
  • the touch control circuit 14 includes an acquisition unit 141 , a calculation unit 142 , and a control unit 143 .
  • the obtaining unit 141 is configured to obtain a voltage value of the detection signal and a voltage average value of the preset signal.
  • the calculating unit 142 is configured to calculate a difference between a voltage average value of the preset signal and a voltage value of the detection signal.
  • the control unit 143 is configured to use the difference as a comparison result, and transmit the comparison result to the timing control circuit 16 so that the timing control circuit 16 operates the touch circuit 14 and the display circuit 15 according to the comparison result. The corresponding touch period and the duration of the display period are adjusted.
  • FIG. 3 is an operation timing diagram of a frame display period of the touch display screen 10 shown in FIG. 1
  • FIG. 4 is a schematic flowchart of a touch display driving method of the touch display screen 10 illustrated in FIG. 1 . .
  • the timing control circuit 16 outputs a vertical synchronization signal V-sync to divide the display time period of one frame of image display time period into N consecutive working periods P, for example, P1, P2, ..., PM...PN, where N>M> 1, N and M are integers.
  • each working period P performs image display and touch sensing corresponding to one scanning area.
  • the first working period P1 corresponds to the first scanning area A1
  • the second working period P2 corresponds to the second scanning area A2
  • the Mth working period PM corresponds to the Mth scanning area AM
  • the Nth working period PN corresponds to the Nth scanning Area AN.
  • the vertical synchronization signal V-sync further controls the display circuit 15 and the touch circuit 14 to respectively operate in the display period D and the touch period T.
  • the working period P1 includes the touch period T1 and the display period D1
  • the working period PM includes the touch period TM and the display period DM
  • the working period PN includes the touch period TN and the display period DN.
  • the display period D all the second signal lines 12 in the corresponding scanning area are loaded with the scan driving signal to perform image display in cooperation with the third signal line 13; in the touch period T, the second in the scanning channel corresponding to the scanning area
  • the signal 12 loads the touch driving signal to perform touch sensing with the plurality of first signal lines 11. That is, in each working period P, the touch display screen 10 is controlled to be in the display state during the display period D, and the touch display screen 10 is controlled to be in the touch sensing state during the touch period T.
  • each touch period T includes a detection period ta and a sensing period tb that are continuous in time but do not overlap each other.
  • the touch period T1 includes a detection period ta and a sensing period tb.
  • the detecting period ta provides a touch driving signal to the touch sensing unit and receives a corresponding detecting signal, and compares the detected signal with the preset signal to obtain a comparison result, and according to the comparison As a result, it is determined whether there is noise in the detection signal, so as to increase or decrease the duration of the touch period; in the sensing period tb, the touch driving signal is provided to the touch sensing unit and the sensing signal is received, through the analysis
  • the sensing signal is described to identify a touch operation. In this embodiment, increasing or decreasing the duration of the touch period is increasing or decreasing the duration of the sensing period tb.
  • the working step of the touch display screen 10 is specifically described by taking the first working period P1 in a frame image display period as an example.
  • the touch display driving method includes the following steps:
  • Step 101 In the display period D, the plurality of second signal lines 12 in the touch display screen 10 are driven to cooperate with the plurality of third signal lines 13 in the touch display screen 10 for performing image signal transmission for image display.
  • the timing control circuit 16 executes the first control signal in the vertical synchronization signal V-sync to the display circuit 15, and the display circuit 15 sequentially sends the scan driving signal to the plurality of second
  • the signal line 12 transmits image data (Display Data) to the plurality of third signal lines 13 so that the touch display screen 10 performs image display.
  • Step 102 driving a plurality of first signal lines 11 in the touch display screen 10 and at least one second signal line 12 of the plurality of second signal lines 12 to form a touch sensing unit during the touch period T To perform touch sensing.
  • the timing control circuit 16 sends the second control signal in the vertical synchronization signal V-sync to the touch circuit 14, and the touch circuit 14 sequentially outputs the touch drive.
  • the signal is sent to the second signal line 12 in the scan channel Txi in the corresponding scan area, and the touch sensing signal (Touch Data) is received from the plurality of first signal lines 11 to enable the touch display screen 10 to perform touch sensing.
  • the touch sensing signal includes a detection signal and a sensing signal.
  • the timing control circuit 16 sends the second control signal to the touch circuit 14 when the touch display screen 10 is in the touch period T.
  • the circuit 14 sequentially loads the touch driving signal onto the second signal line 12 in the scanning channel Txi in the scanning area Ai, thereby driving the second signal line 12 in the scanning channel Txi to form a contact with the plurality of first signal lines 11.
  • the sensing unit is controlled to cause the touch display 10 to perform touch sensing.
  • the timing control circuit 16 sends a second control signal to The touch circuit 14 sequentially loads the touch driving signal onto the second signal line 12 in the scanning channel Tx1 of the scanning area A1, thereby driving the second signal line 12 and the plurality of lines in the scanning channel Tx1.
  • a signal line 11 constitutes a touch sensing unit to cause touch display 10 to perform touch sensing.
  • the driving step 102 corresponding to the touch period further includes:
  • Step 1021 In the detection period ta, providing a touch driving signal to at least one second signal line 12 of the plurality of second signal lines 12, and receiving a detection signal from the plurality of first signal lines 11, the The detection signal is compared with the preset signal to obtain a comparison result, and the duration of the touch period is increased or decreased according to the comparison result.
  • the touch display screen 10 controls the timing control circuit 16 to send the second control signal to the touch circuit 14 , and the touch circuit 14 is in the plurality of second signal lines 12 in the detection period ta in the touch period T
  • the at least one second signal line 12 provides a touch driving signal, and receives the detection signal from the plurality of first signal lines 11, and compares the detection signal with the preset signal to obtain a comparison result, and increases or decreases according to the comparison result.
  • the duration of the small touch period thereby correspondingly reducing the display period or increasing the duration of the display period when the duration of each working period P is constant.
  • the touch control circuit 14 further provides a touch driving signal to the at least one second signal line 12 of the plurality of second signal lines 12 during the sensing period Tb in the touch period T, and the plurality of first signal lines 12
  • the sensing signal is received and analyzed to identify a touch operation.
  • the touch display screen 10 controls the timing control circuit 16 to send the second control signal to the touch circuit 14 , and the touch control circuit 14 provides the touch drive signal to the second signal line 12 in the scan channel Tx1, and the plurality of A signal line 11 receives the detection signal, and compares the detection signal with the preset signal to obtain a comparison result, and transmits the comparison result to the timing control circuit 16, so that the timing control circuit 16 increases or decreases according to the comparison result.
  • the comparison result may be obtained by comparing the voltage value of the detection signal with the voltage average value of the preset signal, or by comparing the waveform of the detection signal with the waveform of the preset signal. of.
  • the comparison result can be used to characterize whether there is noise in the detected signal.
  • the acquiring unit 141 acquires the voltage value of the detection signal and the voltage average value of the preset signal, and calculates, by the calculating unit 142, a difference between the voltage average value of the preset signal and the voltage value of the detection signal.
  • the control unit 143 uses the difference as the comparison result, and transmits the comparison result to the timing control circuit 16 so that the timing control circuit 16 adjusts the duration of the touch period according to the comparison result.
  • the touch circuit 14 compares the waveform of the detection signal with the waveform of the preset signal
  • the comparison result is a similarity
  • the first range is a value range of the similarity.
  • the acquiring unit 141 acquires the waveform of the detection signal and the waveform of the preset signal, and calculates the similarity between the waveform of the preset signal and the waveform of the detection signal via the calculating unit 142, and the control unit 143 uses the similarity as The result is compared, and the comparison result is transmitted to the timing control circuit 16 so that the timing control circuit 16 adjusts the duration of the touch period based on the comparison result.
  • the duration of the touch period T of the touch display screen 10 and the duration of the display period D are adjusted by comparing the detection signal with the preset signal to characterize whether there is noise in the detection signal. .
  • the comparison result is in the first range
  • the noise is not present in the detection signal
  • the timing control circuit 16 reduces the duration of the touch period T by a first duration, and increases the duration of the display period D.
  • sufficient charging time is reserved for the pixel unit (not shown in FIG. 1), so that the display effect of the touch display screen 10 is improved.
  • the comparison result exceeds the first range, the noise is detected in the detection signal, the duration of the touch period T is increased by the second duration, and the duration of the display period D is decreased by the second duration, thereby ensuring the touch. Control accuracy.
  • the comparison result is a difference between a voltage average value of the touch driving signal and a voltage value of the detection signal. If the difference between the voltage average value of the touch driving signal and the voltage value of the detecting signal is less than ten percent of the voltage value of the touch driving signal, that is, the comparison result belongs to the first range, the detection is characterized There is no noise in the signal, and the timing driving circuit 16 reduces the duration of the touch period T by a first duration, and increases the duration of the display period D by a first duration.
  • the timing driving circuit 16 increases the duration of the touch period T by a second duration, and reduces the duration of the display period D by a second duration.
  • Step 1022 In the sensing period tb, providing a touch driving signal to at least one second signal line 12 of the plurality of second signal lines 12, and receiving the sensing signal from the plurality of first signal lines 11, analyzing The sensing signal is to identify a touch operation.
  • the touch display screen can perform image display and touch sensing in a time-sharing manner during each working period, and compare the detection signal with the preset signal during the detection period of the touch period to obtain a result. According to the comparison result, the duration of the touch display touch period and the duration of the display period are adjusted, thereby improving the flexibility of the touch display time-sharing display, and satisfying the touch display precision or display effect. Demand.

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Abstract

本发明公开了一种触摸显示驱动方法及触摸显示屏，具体地，所述触摸显示屏包括多个连续的工作时段，每个工作时段包括显示时段与触控时段，在所述显示时段，多条第二信号线配合多条第三信号线用于配合执行图像信号传输以进行图像显示；所述触控时段包括侦测时段与感测时段，在所述侦测时段内，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收侦测信号；将所述侦测信号与预设信号进行比较得到比较结果，依据所述比较结果增加或者减小所述触控时段的时长。采用本发明可以调整触控时段的时长，使得触摸显示屏的分时触摸显示更为灵活，并满足对提高触摸显示屏触控精度或显示效果的需求。

Description

触摸显示驱动方法与触摸显示屏 技术领域
本发明涉及显示技术领域，尤其涉及一种触摸显示驱动方法以及触摸显示屏。
背景技术
随着显示技术的飞速发展，触摸屏已经遍及人们的生活中。现有的触摸显示屏主要采用分时驱动的方式实现触控功能和显示功能。
目前，触摸显示屏中的触控驱动电路、触控感应电路通常设置于触控面板的一侧，由此，触控面板中的触控驱动电极与触控感应电极与触控驱动电路、触控感应电路的距离并不相同。那么，在触摸显示屏中则会存在距离触控驱动电路较远的触控电极以及较近的触控电极，由于传输触控信号的触控线路的电阻电容延时，使得扫描距离触控驱动电路较远的触控驱动电极行所用的时间最长。为了保证距离触控驱动电路较远的触控驱动电极行能够被正常扫描到，各触控时段的时长通常会固定为扫描距离触控驱动电路较远的触控驱动电极行所用的时长，灵活性较差。
发明内容
为解决前述问题，本发明实施例提供一种触摸显示驱动方法以及触摸显示屏，可以实现对触摸显示屏的触控时段的时长和显示时段的时长的调节，提高了触摸显示屏分时触摸显示的灵活性，并可以满足对提高触控精度或显示效果的需求。
第一方面，本发明实施例提供了一种应用于触摸显示屏的触摸显示驱动方法。所述触摸显示屏包括多条第一信号线、多条第二信号线以及多条第三信号线，所述触摸显示屏执行图像显示与触摸操作时包括多个连续的工作时段，每个工作时段包括显示时段与触控时段，所述显示时段与所述触摸时段在时间上 不重叠。所述触摸显示驱动方法包括：在任一所述工作时段内，在所述显示时段，驱动所述多条第二信号线配合所述多条第三信号线执行图像信号传输以进行图像显示；在所述触控时段，驱动所述多条第一信号线与所述多条第二信号线中的至少一条第二信号线配合构成触摸感测单元以执行触控感测，其中，所述触控时段包括侦测时段与感测时段。在所述侦测时段内，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收侦测信号，将所述侦测信号与预设信号进行比较得到比较结果，并且依据所述比较结果增加或者减小所述触控时段的时长。在所述感应时段内，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收感应信号，分析所述感应信号以识别触摸操作。
第二方面，本发明实施例提供了一种所述触摸显示屏包括多条第一信号线、多条第二信号线以及多条第三信号线，所述触摸显示屏执行图像显示与触摸操作时包括多个连续的工作时段，每个工作时段包括显示时段与触控时段，所述显示时段与所述触摸时段在时间上不重叠。在任一所述工作时段内，所述显示电路用于在所述显示时段向所述多条第二信号线提供扫描驱动信号，并且向所述多条第三信号线提供图像信号，以使所述多条第二信号线配合所述第三信号线用于配合执行图像信号传输以进行图像显示。所述触控电路用于在所述触控时段向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，所述多条第一信号线与所述多条第二信号线中的至少一条第二信号线配合构成触摸感测单元以执行触控感测。其中，所述触控时段包括侦测时段与感测时段。所述触控电路在所述侦测时段内向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收侦测信号，并将所述侦测信号与预设信号进行比较得到比较结果，以便于依据所述比较结果增加或者减小所述触控时段的时长。所述触控电路在所述感应时段向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收感应信号，分析所述感应信号以识别触摸操作。
本发明实施例中，触摸显示屏在包括有显示时段和触控时段的每个工作时段可以分时地进行图像显示以及触控感测，并在触控时段的侦测时段内，将侦测信号与预设信号进行比较得到结果，并根据比较结果实现对触控时段的时长 以及显示时段的时长的调节，提高了分时触摸显示的灵活性，并满足了对提高触摸显示屏显示效果或触控精度的需求。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种触摸显示屏的平面结构示意图；
图2是本发明实施例提供的图1所示的触控电路的结构示意图；
图3是本发明实施例基于图1所示的触摸显示屏提供的一种工作时序的示意图；
图4是本发明实施例基于图1所示的触摸显示屏提供的一种触摸显示驱动方法的流程示意图；
图5是本发明实施例基于图4所示的触控时段的具体驱动流程示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。显然，所描述的实施方式是本发明的一部分实施方式，而不是全部实施方式。在本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施方式，都应属在本发明保护的范围。
本发明实施例提供了一种应用于触摸显示屏的触摸显示驱动方法，用于在显示时段进行图像显示，并在触控时段中的侦测时段，将侦测信号与预设信号进行比较，并在比较结果未处于第一范围内的时候，增加或者检测触控时段的时长，提高了分时显示触控的灵活性，并满足了对提高显示效果或触控精度的需求。
请参阅图1，为本发明实施例提供的一种触摸显示屏10的平面结构示意 图。具体地，该触摸显示屏10包括多个沿第一方向x延伸并且沿着第二方向y排布的多个扫描区域A1～AM～AN，其中，N>M>1，N和M均为整数，第一方向x与第二方向y相互垂直。每个扫描区域Ai由多条沿第一方向x延伸且沿着第二方向y排布的第二信号线12构成，1≤i≤N。
其中，每个扫描区域Ai内包括一个扫描通道Txi，并且每个扫描通道Txi包括多条第二信号线12中的至少一条第二信号线12。较佳地，各个所述扫描通道Txi中多条第二信号线12中至少一条第二信号线12的数量和在每个通道中所处的排列位置相同。
所述触摸显示屏10还包括多条沿第二方向y延伸并且沿着第一方向x排布的第一信号线11与第三信号线13，其中第一信号线11与第三信号线13相互绝缘。本实施例中，触摸显示屏10还包括触控电路14、显示电路15以及时序控制电路16。
其中，显示电路15分别与多条第二信号线12和多条第三信号线13电连接，用于驱动多条第二信号线12配合多条第三信号线13执行图像信号传输以进行图像显示。触控电路14分别与多条第二信号线12中至少一条第二信号线12以及多条第一信号线11电连接，用于驱动至少一条第二信号线12配合多条第一信号线11构成触摸感测单元(图1未示)以使触摸显示屏10执行触控感测。时序控制电路16分别与触控电路14以及显示电路15电连接，以控制触控电路11与显示电路15的工作时间并且分时进行工作，从而实现触摸显示屏10的分时图像显示和触控感测。其中，需要说明的是，所述触控感测至少能够识别施加在触摸显示屏上的触摸操作的位置，当然，还可以识别所述触摸操作的施加力度、施加时间等。
具体地，所述时序控制电路16控制触控电路14与显示电路15分时工作为：时序控制电路16控制触控电路14与显示电路15在多个连续的工作时段执行图像显示与触摸操作时，每个工作时段包括显示时段与触控时段，对应地，时序控制电路16还进一步控制显示电路15在显示时段执行图像显示以及控制触控电路14在触控时段执行触摸感测。较佳地，所述显示时段与所述触摸时段在时间上不重叠。
本实施例中，该第一信号线11为触控感应线，该第二信号线12分时作为 扫描线与触控驱动线，该第三信号线13为数据线，也即是，触摸显示屏10将第二信号线12分时复用为触摸感测中的触控驱动线与图像显示中的扫描线。
需要说明的是，时序控制电路16在任意工作时段中的显示时段输出第一控制信号至显示电路15控制显示电路15通过第二信号线12与第三信号线13分别配合输出扫描驱动信号与图像信号以使触摸显示屏10处于显示状态；时序控制电路16还在任意工作时段中的触控时段输出第二控制信号至触控电路14通过第二信号线12输出触控驱动信号以及通过第一信号线11接收触摸感测信号，以使触摸显示屏10处于触控感测状态。
具体地，在显示时段，显示电路15将扫描驱动信号加载到多条第二信号线12上，并将图像信号加载到多条第三信号线13上，以使多条第二信号线12配合多条第三信号线13用于配合实现图像信号传输以进行图像显示。在触控时段，触控电路14在接收到触控驱动信号后，将触控驱动信号依序加载到多条第二信号线12中的至少一条第二信号线12上，并且自所述多条第一信号线11接收触摸感测信号。
更具体地，该触控时段包括侦测时段和感测时段。触控电路14在侦测时段内，向多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自多条第一信号线11接收侦测信号，并将侦测信号与预设信号进行比较得到比较结果，并且将比较结果传输至时序控制电路16，由时序控制单路16依据该比较结果增加或者减小所述触控时段的时长。触控电路14在感应时段向多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自多条第一信号线11接收所述触控感应信号，分析该触控感应信号以识别触摸操作。
如图2所示，触控电路14包括获取单元141、计算单元142、控制单元143。其中，获取单元141用于获取该侦测信号的电压值与该预设信号的电压平均值；计算单元142用于计算得到该预设信号的电压平均值与该侦测信号的电压值的差值；控制单元143用于将该差值作为比较结果，并将该比较结果传输至所述时序控制电路16，以便时序控制电路16根据该比较结果对触控电路14以及显示电路15在工作时对应的触控时段与显示时段的时长进行调整。
请参阅图3-4，图3为图1所示的触摸显示屏10一帧图像显示时间段的工 作时序图，图4为图1所示的触摸显示屏10的触摸显示驱动方法的流程示意图。
时序控制电路16输出垂直同步信号V-sync将一帧图像显示时间段的显示时间段分为N个连续的工作时段P，例如P1、P2、……PM……PN，其中，N>M>1，N和M为整数。其中，每个工作时段P对应一个扫描区域执行图像显示与触控感测。如第一工作时段P1对应第一扫描区域A1，第二工作时段P2对应第二扫描区域A2，以此类推，第M工作时段PM对应第M扫描区域AM，第N工作时段PN对应第N扫描区域AN。
对应每个工作时段P，垂直同步信号V-sync还进一步控制显示电路15与触控电路14分别对应工作在显示时段D和触控时段T。例如，工作时段P1包括触控时段T1和显示时段D1、工作时段PM包括触控时段TM和显示时段DM、工作时段PN包括触控时段TN和显示时段DN。其中，在显示时段D，对应扫描区域内的全部第二信号线12加载扫描驱动信号，以配合第三信号线13执行图像显示；在触控时段T，对应扫描区域的扫描通道中的第二信号12加载触控驱动信号，以配合多条第一信号线11执行触控感测。即，在每个工作时段P中，控制触摸显示屏10在显示时段D处于显示状态，并控制触摸显示屏10在触控时段T处于触控感测状态。
进一步，每个触控时段T包括在时间上连续但不相互重叠的侦测时段ta和感测时段tb，例如，触控时段T1包括侦测时段ta和感测时段tb。其中，所述侦测时段ta，向触控感测单元提供触控驱动信号且接收对应的侦测信号，将所述侦测信号与预设信号进行比较从而得到比较结果，并且依据所述比较结果判定所述侦测信号是否存在噪音，以便于增加或者减小所述触控时段的时长；在感测时段tb，向触控感测单元提供触控驱动信号且接收感应信号，通过分析所述感应信号以识别触摸操作。本实施例中，增加或者减小所述触控时段的时长为加或者减小感测时段tb的时长。
本实施例以一帧图像显示时间段内的第一个工作周期P1为例具体说明触摸显示屏10的工作步骤。
如图4所示，所述的触摸显示驱动方法包括以下步骤：
步骤101、在显示时段D，驱动触摸显示屏10中的多条第二信号线12配合所述触摸显示屏10中的多条第三信号线13用于配合执行图像信号传输以进 行图像显示。
在该步骤中，由时序控制电路16与显示电路15执行。具体地，触摸显示屏10在处于显示时段D时，时序控制电路16发送垂直同步信号V-sync中的第一控制信号至显示电路15，显示电路15依序将扫描驱动信号发送至多条第二信号线12，并发送图像数据(Display Data)至多条第三信号线13，从而使触摸显示屏10进行图像显示。
步骤102、在触控时段T，驱动所述触摸显示屏10中的多条第一信号线11与所述多条第二信号线12中的至少一条第二信号线12配合构成触摸感测单元以执行触控感测。
需要说明的是，触摸显示屏10在处于触控时段T时，时序控制电路16发送垂直同步信号V-sync中的第二控制信号至触控电路14，触控电路14依序输出触控驱动信号至对应扫描区域中扫描通道Txi中第二信号线12，并且自多条第一信号线11接收触控感测信号(Touch Data)以使触摸显示屏10进行触控感测的识别。其中，该触控感测信号包括侦测信号与感应信号。
具体地，若触摸显示屏10在触控时段T扫描的为扫描区域Ai，则在触摸显示屏10处于触控时段T时，时序控制电路16发送第二控制信号至触控电路14，触控电路14依序将触控驱动信号加载到扫描区域Ai中的扫描通道Txi中的第二信号线12上，从而驱动扫描通道Txi中的第二信号线12与多条第一信号线11构成触控感测单元以使触摸显示屏10进行触控感测。
举例来说，以图1为例，若触摸显示屏10在触控时段T1扫描的为扫描区域A1，则触摸显示屏10在处于触控时段T1时，时序控制电路16发送第二控制信号至触控电路14，触控电路14依序将触控驱动信号加载到扫描区域A1的扫描通道Tx1中的第二信号线12上，从而驱动扫描通道Tx1中的第二信号线12与多条第一信号线11构成触控感测单元以使触摸显示屏10进行触控感测。
具体地，如图5所示，对应触控时段的驱动步骤102进一步包括：
步骤1021、在侦测时段ta内，向多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自多条第一信号线11接收侦测信号，将所述侦测信号与预设信号进行比较得到比较结果，依据所述比较结果增加或者减小所 述触控时段的时长。
具体地，触摸显示屏10控制时序控制电路16发送第二控制信号至触控电路14，触控电路14在触控时段T中的侦测时段ta内，向多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自多条第一信号线11接收侦测信号，并将该侦测信号与预设信号进行比较得到比较结果，依据该比较结果增加或者减小触控时段的时长，从而在保证每个工作时段P时长不变时对应减小显示时段或者增加显示时段的时长。并且触控电路14还在触控时段T中的感应时段Tb内，向多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自多条第一信号线12接收感应信号，分析该感应信号以识别触摸操作。
举例来说，以图1为例，若触控电路14在触控时段T1扫描的是扫描区域A1的扫描通道Tx1中的第二信号线12，则在触控时段T1中的侦测时段ta内，触摸显示屏10控制时序控制电路16发送第二控制信号至触控电路14，并由触控电路14向扫描通道Tx1中的第二信号线12提供触控驱动信号，且自多条第一信号线11接收侦测信号，并将该侦测信号与预设信号进行比较得到比较结果，将该比较结果传输至时序控制电路16，从而由时序控制电路16根据该比较结果增加或者减小触控时段T1中感应时段tb的时长；并且，触控电路14还在触控时段T1中的感应时段tb内，向扫描区域A1的扫描通道Tx1中的第二信号线12提供触控驱动信号，且自多条第一信号线12接收感应信号，分析该感应信号以识别触摸操作。
本发明实施例中，该比较结果可以是将侦测信号的电压值与预设信号的电压平均值进行比较后得到的，或者为将侦测信号的波形与预设信号的波形进行比较后得到的。该比较结果可以用来表征该侦测信号中是否存在噪声。
具体地，获取单元141获取该侦测信号的电压值与该预设信号的电压平均值，并经由计算单元142计算得到该预设信号的电压平均值与该侦测信号的电压值的差值，控制单元143将该差值作为该比较结果，并将所述比较结果传输至所述时序控制电路16，以便时序控制电路16根据该比较结果调整触控时段的时长。
或者，触控电路14利用该侦测信号的波形与预设信号的波形进行比较时， 该比较结果为相似度，该第一范围为相似度的取值范围。获取单元141获取该侦测信号的波形与该预设信号的波形，并经由计算单元142计算得到该预设信号的波形与该侦测信号的波形的相似度，控制单元143将该相似度作为比较结果，并将该比较结果传输至所述时序控制电路16，以便时序控制电路16根据该比较结果调整触控时段的时长。
本实施例中，通过将侦测信号与预设信号进行比较来以表征该侦测信号中是否存在噪声，从而实现对触摸显示屏10的触控时段T的时长和显示时段D的时长的调整。较佳地，在比较结果处于第一范围内时，表征该侦测信号中不存在噪声，时序控制电路16将触控时段T的时长减少第一时长，且将该显示时段D的时长增加第一时长，在保证触控精度的同时，为像素单元(图1未示)预留了足够的充电时间，使得触摸显示屏10的显示效果得到了提升。在该比较结果超过第一范围时，则表征该侦测信号中存在噪声，将该触控时段T的时长增加第二时长，且将该显示时段D的时长减少第二时长，从而保证了触控精度。
举例来说，假设该比较结果为触控驱动信号的电压平均值与该侦测信号的电压值的差值。若触控驱动信号的电压平均值与该侦测信号的电压值的差值小于该触控驱动信号的电压值的百分之十，即该比较结果属于第一范围内，则表征该侦测信号中不存在噪声，时序驱动电路16将该触控时段T的时长减少第一时长，且将该显示时段D的时长增加第一时长。或者，在触控驱动信号的电压平均值与该侦测信号的电压值的差值大于或等于该触控驱动信号的电压值的百分之十时，即该比较结果超过第一范围时，表征该侦测信号中存在噪声，时序驱动电路16将触控时段T的时长增加第二时长，且将该显示时段D的时长减少第二时长。
步骤1022、在感应时段tb内，向所述多条第二信号线12中的至少一条第二信号线12提供触控驱动信号，且自所述多条第一信号线11接收感应信号，分析所述感应信号以识别触摸操作。
采用本发明实施例，触摸显示屏在每个工作时段可以分时地进行图像显示以及触控感测，并在触控时段的侦测时段内，将侦测信号与预设信号进行比较得到结果，并根据比较结果实现对触摸显示屏触控时段的时长以及显示时段的 时长的调节，提高了触摸显示屏分时触摸显示的灵活性，同时满足了对提高触摸显示屏触控精度或显示效果的需求。
以上对本发明实施例所提供的触摸显示屏、触控电路、触摸显示驱动方法进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种触摸显示驱动方法，应用于触摸显示屏，所述触摸显示屏包括多条第一信号线、多条第二信号线以及多条第三信号线，所述触摸显示屏执行图像显示与触摸操作时包括多个连续的工作时段，每个所述工作时段包括显示时段与触控时段，所述显示时段与所述触摸时段在时间上不重叠，其特征在于，在任一所述工作时段内：
    在所述显示时段，驱动所述多条第二信号线配合所述多条第三信号线执行图像信号传输以进行图像显示；
    在所述触控时段，驱动所述多条第一信号线与所述多条第二信号线中的至少一条第二信号线配合形成触控感测单元以执行触控感测，其中，所述触控时段包括侦测时段与感测时段；
    在所述侦测时段内，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收侦测信号，将所述侦测信号与预设信号进行比较从而得到比较结果，并且依据所述比较结果增加或者减小所述触控时段的时长；
    在所述感应时段内，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收感应信号，分析所述感应信号以识别触摸操作。
  2. 根据权利要求1所述的触摸显示驱动方法，其特征在于，所述依据所述比较结果增加或者减小所述触控时段的时长，包括：
    若所述比较结果属于第一范围内，表征所述侦测信号中不存在噪声，将所述触控时段中所述感测时段的时长减少第一时长，且增加所述显示时段的时长。
  3. 根据权利要求1所述的触摸显示驱动方法，其特征在于，所述依据所述比较结果增加或者减小所述触控时段的时长，包括：
    若所述比较结果超过所述第一范围，表征所述侦测信号中存在噪声，将所 述触控时段中所述感测时段的时长增加第二时长，并减少所述显示时段的时长。
  4. 根据权利要求1-3任意一项所述的触摸显示驱动方法，其特征在于，所述将所述侦测信号与预设信号进行比较得到比较结果，包括：
    获取所述侦测信号的电压值与所述预设信号的电压平均值；
    计算得到所述预设信号的电压平均值与所述侦测信号的电压值的差值；
    将所述差值作为所述比较结果。
  5. 根据权利要求4所述的触摸显示驱动方法，其特征在于，所述触摸显示屏包括多个沿第一方向延伸并且沿着第二方向排布的多个扫描区域，所述第一方向与所述第二方向相互垂直，每个扫描区域包括多条沿所述第一方向且延伸并且沿所述第二方向排布的所述多条第二信号线，每个扫描区域内包括一个扫描通道，并且每个扫描通道包括所述多条第二信号线中的至少一条所述第二信号线，且每个所述扫描通道中所述第二信号线的数量和排列位置相同，所述多条第一信号线与所述多条第三信号线沿所述第二方向延伸且沿着所述第一方向相互绝缘排列设置，其中，每个所述工作时段对应一个扫描区域。
  6. 一种触摸显示屏，所述触摸显示屏包括多条第一信号线、多条第二信号线以及多条第三信号线，所述触摸显示屏执行图像显示与触摸操作时包括多个连续的工作时段，每个工作时段包括显示时段与触控时段，所述显示时段与所述触摸时段在时间上不重叠，其特征在于，在任一所述工作时段内，
    所述显示电路用于在所述显示时段向所述多条第二信号线提供扫描驱动信号，并且向所述多条第三信号线提供图像信号，以使所述多条第二信号线配合所述第三信号线用于配合执行图像信号传输以进行图像显示；
    所述触控电路用于在所述触控时段，向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，所述多条第一信号线与所述多条第二信号线中的至少一条第二信号线配合构成触摸感测单元以执行触控感测，其中，所述触控时段包括侦测时段与感测时段；
    所述触控电路在所述侦测时段内向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收侦测信号，并将所述侦测信号与预设信号进行比较得到比较结果，以便于依据所述比较结果增加或者减小所述触控时段的时长；
    所述触控电路在所述感应时段向所述多条第二信号线中的至少一条第二信号线提供触控驱动信号，且自所述多条第一信号线接收感应信号，分析所述感应信号以识别触摸操作。
  7. 根据权利要求6所述的触摸显示屏，其特征在于，所述触摸显示屏还包括时序控制电路，所述时序控制电路用于控制显示电路与所述触控电路的工作时间，当所述比较结果属于所述第一范围，表征所述侦测信号中不存在噪声，所述时序控制电路控制所述触控时段中所述感测时段的时长减少第一时长，并增加所述显示时段的时长。
  8. 根据权利要求7所述的触摸显示屏，其特征在于，若所述比较结果超过所述第一范围，表征所述侦测信号中存在噪声，所述时序控制电路控制所述触控时段中所述感测时段的时长增加第二时长，并减少所述显示时段的时长。
  9. 根据权利要求7或8所述的触摸显示屏，其特征在于，所述触控电路包括获取单元、计算单元与控制单元，其中：
    所述获取单元用于获取所述侦测信号的电压值与所述预设信号的电压平均值；
    所述计算单元用于计算得到所述预设信号的电压平均值与所述侦测信号的电压值的差值；
    所述控制单元用于将所述差值作为所述比较结果，并将所述比较结果传输至所述时序控制电路。
  10. 根据权利要求9所述的触摸显示屏，其特征在于，所述触摸显示屏包括多个沿第一方向延伸并且沿着第二方向排布的多个扫描区域，所述第一方向 与所述第二方向相互垂直，每个扫描区域包括多条沿所述第一方向且延伸并且沿所述第二方向排布的所述多条第二信号线，每个扫描区域内包括一个扫描通道，并且每个扫描通道包括所述多条第二信号线中的至少一条所述第二信号线，且每个所述扫描通道中所述第二信号线的数量和排列位置相同，所述多条第一信号线与所述多条第三信号线沿所述第二方向延伸且沿着所述第一方向相互绝缘排列设置，其中，每个所述工作时段对应一个扫描区域。
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EP3770733A4 (en) 2021-11-24
CN112041797A (zh) 2020-12-04
US11243635B2 (en) 2022-02-08

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