WO2017152468A1 - 降低功耗的触控扫描驱动方法 - Google Patents

降低功耗的触控扫描驱动方法 Download PDF

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WO2017152468A1
WO2017152468A1 PCT/CN2016/079231 CN2016079231W WO2017152468A1 WO 2017152468 A1 WO2017152468 A1 WO 2017152468A1 CN 2016079231 W CN2016079231 W CN 2016079231W WO 2017152468 A1 WO2017152468 A1 WO 2017152468A1
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touch
scan
electrodes
touch scan
display panel
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PCT/CN2016/079231
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English (en)
French (fr)
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左清成
袁小玲
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武汉华星光电技术有限公司
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Priority to US15/032,633 priority Critical patent/US20170262116A1/en
Publication of WO2017152468A1 publication Critical patent/WO2017152468A1/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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • 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
    • 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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G06F3/041661—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to the field of touch display technologies, and in particular, to a touch scan driving method for reducing power consumption.
  • touch display panels have been widely accepted and used, such as smart phones, tablets, etc., using a touch panel (Touch Panel).
  • the touch display panel provides a new human-computer interaction interface, which is more intuitive and simple to perform by inputting with a finger, a stylus, and the like.
  • Touch display panels can be divided into resistive, capacitive, optical, and acoustic waves according to different sensing technologies.
  • the mainstream touch technology is capacitive, and the capacitive type is divided into self-capacitance and mutual capacitance.
  • the capacitive touch display panels on the market are mainly mutual capacitance type, and the mutual capacitance has the advantage that multi-touch can be realized.
  • the touch display panel can be divided according to the structure: the touch circuit is covered on the liquid crystal cell (On Cell), the touch circuit is embedded in the liquid crystal cell (In Cell), and the external type.
  • In Cell technology is considered to be a high-end technology in the field of touch display, with the advantages of ultra-thin, narrow borders.
  • FIG. 1 is a schematic structural view of a mutual capacitive touch panel including a plurality of laterally arranged touch transmitting electrodes Tx(1), Tx(2), Tx(3), to Tx(m), and a plurality of longitudinal directions.
  • the touch receiving electrodes Rx(1), Rx(2), Rx(3), Rx(n), m, and n are all positive integers greater than 2, and the touch emitter electrode and the touch receiving electrode are mutually insulation. Since the human body will carry moisture and is also an excellent conductor, if the human body is close to the electrode, the capacitance between the finger and the electrode will increase. At this time, as long as the scanning signal is emitted to the touch transmitting electrode and the touch receiving electrode is controlled to receive the sensing signal, the investigation is passed. The coordinates of the sensing signal whose capacitance increases, the specific position of the touch point can be obtained.
  • the mutual-capacitive touch display panel shown in FIG. 1 adopts time-sharing scanning, that is, performing display scanning and then performing touch scanning.
  • the timing diagram of the conventional touch scan driving method for the mutual capacitive touch display panel shown in FIG. 1 is as shown in FIG. 3, and in combination with FIG. 2 and FIG. 3, whether the touch display panel is in a touch state or in a In the standby state or the normal display but no touch state, it is necessary to provide touch scan pulse signals to all the touch transmitting electrodes Tx(1), Tx(2), Tx(3), and Tx(m) one by one, and continuously perform Signal transceiving to continuously detect whether a touch is in progress.
  • the touch scanning signal is continuously input into the touch transmitting electrode and there is a constant
  • the touch receiving electrode receives the touch sensing signal, and needs to continuously consume power, thereby causing waste of power consumption.
  • An object of the present invention is to provide a touch scan driving method capable of reducing the power consumption of the touch display panel without affecting the normal operation and scanning accuracy of the touch display panel.
  • the present invention provides a touch scan driving method, including the following steps:
  • Step 1 providing a touch display panel
  • the touch display panel includes a plurality of laterally arranged touch transmitting electrodes and a plurality of vertically arranged touch receiving electrodes, wherein the touch emitting electrodes and the touch receiving electrodes are insulated from each other;
  • Step 2 detecting and determining whether the touch display panel is in a standby state or normal display but no touch state, and if so, proceeding to step 3, if not, proceeding to step 4;
  • Step 3 performing a sparse touch scan, and one touch scan sends only the touch scan pulse signal to the partial touch transmit electrodes, and all the touch receiving electrodes receive the touch sensing signals;
  • At least one touch transmitting electrode that stops working is disposed between two adjacent touch transmitting electrodes that transmit touch scan pulse signals; for adjacent two touch scans, each touch scan is transmitted.
  • the touch emitter electrode of the pulse signal is different; the cycle is performed by a continuous number of touch scans, and each touch emitter electrode is operated at least once in one unit execution cycle;
  • Step 4 Perform a full touch scan, and one touch scan sends the touch scan pulse signals one by one to all the touch transmit electrodes, and all the touch receiving electrodes receive the touch sensing signals.
  • N be a positive integer
  • the specific process of the sparse touch scan in step 3 is:
  • the Nth touch scan sends the touch scan pulse signal only to all the odd touch emitter electrodes, and all the even touch emitter electrodes stop working;
  • the N+1th touch scan sends the touch scan pulse signal only to all the even number of touch emitter electrodes, and all the odd touch emitter electrodes stop working.
  • M be a positive integer greater than or equal to 2, with a continuous M touch scan as a unit execution cycle, and each touch emitter electrode operates at least once in one unit execution cycle.
  • the timings of two adjacent touch scan pulse signals are different by two pulse widths.
  • N be a positive integer
  • i be a positive integer
  • the specific process of the sparse touch scan in step 3 is:
  • the Nth touch scan sends the touch scan pulse signal only to all the 3i-2 touch emitter electrodes, and the other touch emitter electrodes stop working;
  • the N+1th touch scan sends the touch scan pulse only to all the 3i-1 touch emitter electrodes. Punch signal, other touch emitter electrodes stop working;
  • the N+2 touch scan sends the touch scan pulse signal only to all the 3i touch emitter electrodes, and the other touch emitter electrodes stop working.
  • M be a positive integer greater than or equal to 3, with a continuous M touch scan as a unit execution cycle, and each touch emitter electrode operates at least once in one unit execution cycle.
  • the timings of two adjacent touch scan pulse signals differ by three pulse widths.
  • the timings of two adjacent touch scan pulse signals are different by one pulse width.
  • the touch display panel is an In Cell type mutual capacitance touch display panel.
  • the invention also provides a touch scan driving method for reducing power consumption, comprising the following steps:
  • Step 1 providing a touch display panel
  • the touch display panel includes a plurality of laterally arranged touch transmitting electrodes and a plurality of vertically arranged touch receiving electrodes, wherein the touch emitting electrodes and the touch receiving electrodes are insulated from each other;
  • Step 2 detecting and determining whether the touch display panel is in a standby state or normal display but no touch state, and if so, proceeding to step 3, if not, proceeding to step 4;
  • Step 3 performing a sparse touch scan, and one touch scan sends only the touch scan pulse signal to the partial touch transmit electrodes, and all the touch receiving electrodes receive the touch sensing signals;
  • At least one touch transmitting electrode that stops working is disposed between two adjacent touch transmitting electrodes that transmit touch scan pulse signals; for adjacent two touch scans, each touch scan is transmitted.
  • the touch emitter electrode of the pulse signal is different; the cycle is performed by a continuous number of touch scans, and each touch emitter electrode is operated at least once in one unit execution cycle;
  • Step 4 Performing a full touch scan, one touch scan sends a touch scan pulse signal to all the touch transmitting electrodes one by one, and all the touch receiving electrodes receive the touch sensing signals;
  • the touch display panel is an In Cell type mutual capacitive touch display panel
  • the timings of the adjacent two touch scan pulse signals are different by one pulse width.
  • the touch scan driving method provided by the present invention performs a sparse touch scan in a standby state or a normal display but no touch state of the touch display panel, that is, one touch scan only to a part of the touch emitter electrode
  • Sending a touch scan pulse signal reduces the number of signal transmission and reception times, and performs a full touch scan when the touch display panel is in a touch state, thereby reducing the touch display without affecting the normal operation and scanning accuracy of the touch display panel.
  • Panel power consumption
  • FIG. 1 is a schematic structural view of a mutual capacitive touch panel
  • FIG. 2 is a schematic diagram of the operation of the touch transmitting electrode under the existing touch scanning driving method
  • 3 is a timing diagram of a conventional touch scan driving method
  • FIG. 4 is a flowchart of a method for reducing power consumption of a touch scan driving method according to the present invention
  • FIG. 5 is a schematic diagram showing the operation of the touch emitter electrode during the Nth touch scan according to an embodiment of the step 3 of the power consumption reduction touch scan driving method of the present invention
  • Figure 6 is a timing chart corresponding to Figure 5;
  • FIG. 7 is a schematic diagram showing the operation of the touch transmitting electrode in the N+1th touch scan of an embodiment of the step 3 of the power consumption reducing touch driving method of the present invention.
  • Figure 8 is a timing chart corresponding to Figure 7;
  • FIG. 9 is a schematic diagram showing the operation of the touch emitter electrode in step 4 of the power consumption reduction touch scan driving method of the present invention.
  • FIG. 10 is a timing chart corresponding to FIG. 9.
  • the present invention provides a touch scan driving method including the following steps:
  • Step 1 Provide a touch display panel.
  • the touch display panel is preferably an In Cell type mutual capacitive touch display panel. As shown in FIG. 1 , the touch display panel includes a plurality of laterally arranged touch emitter electrodes Tx(1), Tx(2), Tx(3), and Tx. (m), and a plurality of longitudinally arranged touch receiving electrodes Rx(1), Rx(2), Rx(3), Rx(n), m, n are positive integers greater than 2, and the touch emitter electrode Is insulated from the touch receiving electrodes.
  • the touch transmitting electrodes Tx(1), Tx(2), Tx(3), and Tx(m) are used to transmit touch scan pulse signals, and the touch receiving electrodes Rx(1) and Rx(2) Rx(3) to Rx(n) are used to receive the touch sensing signal.
  • Step 2 Detect and determine whether the touch display panel is in a standby state or a normal display but has no touch state. If yes, execute step 3, if no, go to step 4.
  • Step 3 Perform a sparse touch scan.
  • Sparse touch scanning means that one touch scan only sends touch scan to some touch emitter electrodes.
  • Pulse signal, all touch receiving electrodes Rx(1), Rx(2), Rx(3), and Rx(n) receive touch sensing signals; for the same touch scanning, two adjacent touch scanning scans At least one touch-emitting electrode that stops working is separated between the touch-emitting electrodes of the pulse signal; for two adjacent touch scans, each touch-transmitting electrode that transmits the touch-scan pulse signal is different;
  • the scan is a unit execution cycle in which each touch emitter electrode operates at least once during a unit execution cycle.
  • the sparse touch scan can have a variety of implementations. Referring to FIG. 5 to FIG. 8 , let N be a positive integer and i be a positive integer.
  • the specific process of the sparse touch scan may be:
  • the Nth touch scan only applies to all of the odd touch emitter electrodes, that is, all the 2i-1 touch emitter electrodes Tx(1), Tx(3), Tx(5), Tx. (7) Wait for the touch scan pulse signal to be transmitted, and all the even touch emitter electrodes, that is, all the 2i touch emitter electrodes Tx(2), Tx(4), Tx(6), Tx(8), etc. stop.
  • the timing of two adjacent touch scan pulse signals is different by two pulse widths as shown in FIG.
  • the N+1th touch scan scans only all of the even touch emitter electrodes, that is, all the 2i touch emitter electrodes Tx(2), Tx(4), Tx(6), Tx. (8) Wait for the touch scan pulse signal, all the odd touch emitter electrodes, that is, all the 2i-1 touch emitter electrodes Tx(1), Tx(3), Tx(5), Tx(7) Waiting for the work to stop, the timing of the adjacent two touch scan pulse signals is different by two pulse widths as shown in FIG.
  • M be a positive integer greater than or equal to 2, with a continuous M touch scan as a unit execution cycle, and each touch emitter electrode works at least once in one unit execution cycle, that is, after 2 or more consecutive times.
  • the touch scan all the touch emitter electrodes Tx(1), Tx(2), Tx(3), and Tx(m) are scanned.
  • the Tx (m) provides a touch scan pulse signal one by one.
  • the sparse touch scan mode reduces the number of signal transmissions of one touch scan by 1/2 when the touch display panel is in a standby state or a normal display but has no touch state. Reduce power consumption.
  • the Nth touch scan pole sends touch scan pulse signals only to all of the 3i-2 touch transmit electrodes Tx(1), Tx(4), Tx(7), Tx(10), etc., other touches
  • the control emitter electrode stops working;
  • the N+1th touch scanning electrode transmits the touch scan pulse signal only to all the 3i-1 touch transmitting electrodes Tx(2), Tx(5), Tx(8), Tx(11), etc., other The touch emitter electrode stops working;
  • the N+2th touch scanning electrode only applies to all the 3ith touch transmitting electrodes Tx(3), Tx(6), Tx (9), Tx (12), etc. transmit touch scan pulse signals, and other touch emitter electrodes stop working.
  • the timings of two adjacent touch scan pulse signals differ by three pulse widths.
  • M be a positive integer greater than or equal to 3, with a continuous M touch scan as a unit execution cycle, and each touch emitter electrode works at least once in one unit execution cycle, that is, after 3 or more consecutive times.
  • the touch scan all the touch emitter electrodes Tx(1), Tx(2), Tx(3), and Tx(m) are scanned.
  • the Tx(m) provides a touch scan pulse signal one by one.
  • the sparse touch scan mode reduces the number of signal transmissions of one touch scan by 2/3 when the touch display panel is in a standby state or a normal display but has no touch state. Reduce power consumption.
  • Step 4 Perform a full touch scan.
  • the complete touch scan means that one touch scan scans the touch scan pulses one by one to all the touch transmit electrodes Tx(1), Tx(2), Tx(3), and Tx(m). Signals, all touch receiving electrodes Rx(1), Rx(2), Rx(3), and Rx(n) receive touch sensing signals. As shown in FIG. 10, when the full touch scan is performed, the timings of the adjacent two touch scan pulse signals differ by only one pulse width.
  • the step 4 performs a complete touch scan, which can accurately determine the specific position of the touch point, and thus does not affect the normal operation and scanning accuracy of the touch display panel.
  • the touch scan driving method of the present invention performs a sparse touch scan when the touch display panel is in a standby state or a normal display but has no touch state, that is, one touch scan only sends touches to a part of the touch emitter electrodes.
  • the scanning pulse signal is controlled to reduce the number of signal transmission and reception times, and the touch display panel is in a touch state to perform a full touch scan, thereby reducing the touch display panel without affecting the normal operation and scanning accuracy of the touch display panel. Power consumption.

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  • Theoretical Computer Science (AREA)
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Abstract

一种触控扫描驱动方法，包括以下步骤：步骤1、提供一触控显示面板（1）；步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4（2）；步骤3、实行稀疏触控扫描（3）；步骤4、实行完整触控扫描（4）。上述触控扫描驱动方法在实行稀疏触控扫描时，一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，减少了信号收发次数，在触控显示面板处于触摸状态时实行完整触控扫描，从而能够在不影响触控显示面板正常工作及扫描精度的前提下，降低触控显示面板的功耗。

Description

降低功耗的触控扫描驱动方法 技术领域
本发明涉及触控显示技术领域，尤其涉及一种降低功耗的触控扫描驱动方法。
背景技术
随着显示技术的发展，触控显示面板已经广泛地被人们所接受及使用，如智能手机、平板电脑等均使用了触控显示面板(Touch Panel)。
触控显示面板提供了一种新的人机互动界面，通过手指、触控笔等执行输入，操作更加直观、简便。
触控显示面板依感应技术不同可分为电阻式、电容式、光学式、音波式四种，目前主流的触控技术为电容式，其中电容式又分为自电容式和互电容式，目前市场上的电容式触控显示面板主要为互电容式，互电容的优点在于可实现多点触控。触控显示面板根据结构不同可划分为：触控电路覆盖于液晶盒上式(On Cell)，触控电路内嵌在液晶盒内式(In Cell)、以及外挂式。随着智能手机市场的竞争日趋激烈，In Cell技术被认为是触控显示领域的高端技术，具有超薄、和窄边框等优点。
图1所示为互电容式触控面板的结构示意图，包括多条横向排列的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)、以及多条纵向排列的触控接收电极Rx(1)、Rx(2)、Rx(3)、至Rx(n)，m、n均为大于2的正整数，触控发射电极与触控接收电极之间相互绝缘。由于人体会携带水分，也是优秀导体，故人体若靠近电极，手指与电极之间的电容会增加，此时只要向触控发射电极发射扫描信号，并控制触控接收电极接收感应信号，通过调查感应信号的静电容量变大的坐标，便可以得出触控点的具体位置。
图1所示的互电容式触控显示面板采用分时扫描，即进行完显示扫描再进行触控扫描。现有的针对图1所示互电容式触控显示面板的触控扫描驱动方法所使用的时序图如图3所示，结合图2与图3，不论触控显示面板处于触摸状态，还是处于待机状态或正常显示但无触摸状态，均需要向所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)逐条提供触控扫描脉冲信号，不断地进行信号收发，以不断地去侦测是否有触摸进行。对于上述互电容式触控显示面板来说，由于在待机状态下、及正常显示但无触摸状态下也一直做信号侦测，即不断有触控扫描信号输入触控发射电极和不断有 触控接收电极接收触控感应信号，需要不断地消耗电能，从而造成功耗的浪费。
发明内容
本发明的目的在于提供一种触控扫描驱动方法，能够在不影响触控显示面板正常工作及扫描精度的前提下，降低触控显示面板的功耗。
为实现上述目的，本发明提供一种触控扫描驱动方法，包括以下步骤：
步骤1、提供一触控显示面板；
所述触控显示面板包括多条横向排列的触控发射电极、以及多条纵向排列的触控接收电极，触控发射电极与触控接收电极之间相互绝缘；
步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4；
步骤3、实行稀疏触控扫描，一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
对于同一次触控扫描，相邻两条传送触控扫描脉冲信号的触控发射电极之间至少间隔一条停止工作的触控发射电极；对于相邻两次触控扫描，每次传送触控扫描脉冲信号的触控发射电极不同；以连续数次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次；
步骤4、实行完整触控扫描，一次触控扫描即向所有的触控发射电极逐条发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号。
可选的，设N为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
第N次触控扫描仅向所有的奇数条触控发射电极发送触控扫描脉冲信号，所有的偶数条触控发射电极停止工作；
第N+1次触控扫描仅向所有的偶数条触控发射电极发送触控扫描脉冲信号，所有的奇数条触控发射电极停止工作。
设M为大于等于2的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差两个脉宽。
可选的，设N为正整数，i为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
第N次触控扫描仅向所有的第3i-2条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作；
第N+1次触控扫描仅向所有的第3i-1条触控发射电极发送触控扫描脉 冲信号，其它的触控发射电极停止工作；
第N+2次触控扫描仅向所有的第3i条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作。
设M为大于等于3的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差三个脉宽。
完整触控扫描时，相邻两条触控扫描脉冲信号的时序相差一个脉宽。
所述触控显示面板为In Cell式互电容触控显示面板。
本发明还提供一种降低功耗的触控扫描驱动方法，包括以下步骤：
步骤1、提供一触控显示面板；
所述触控显示面板包括多条横向排列的触控发射电极、以及多条纵向排列的触控接收电极，触控发射电极与触控接收电极之间相互绝缘；
步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4；
步骤3、实行稀疏触控扫描，一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
对于同一次触控扫描，相邻两条传送触控扫描脉冲信号的触控发射电极之间至少间隔一条停止工作的触控发射电极；对于相邻两次触控扫描，每次传送触控扫描脉冲信号的触控发射电极不同；以连续数次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次；
步骤4、实行完整触控扫描，一次触控扫描即向所有的触控发射电极逐条发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
其中，所述触控显示面板为In Cell式互电容触控显示面板；
其中，完整触控扫描时，相邻两条触控扫描脉冲信号的时序相差一个脉宽。
本发明的有益效果：本发明提供的触控扫描驱动方法，在触控显示面板处于待机状态或正常显示但无触摸状态下实行稀疏触控扫描，即一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，减少了信号收发次数，在触控显示面板处于触摸状态时实行完整触控扫描，从而能够在不影响触控显示面板正常工作及扫描精度的前提下，降低触控显示面板的功耗。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本 发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为互电容式触控面板的结构示意图；
图2为在现有的触控扫描驱动方法下，触控发射电极的工作情况示意图；
图3为现有的触控扫描驱动方法的时序图；
图4为本发明的降低功耗的触控扫描驱动方法的流程图；
图5为本发明的降低功耗的触控扫描驱动方法的步骤3的一个实施例在第N次触控扫描时触控发射电极的工作情况示意图；
图6为对应于图5的时序图；
图7为本发明的降低功耗的触控扫描驱动方法的步骤3的一个实施例在第N+1次触控扫描时触控发射电极的工作情况示意图；
图8为对应于图7的时序图；
图9为本发明的降低功耗的触控扫描驱动方法的步骤4中触控发射电极的工作情况示意图；
图10为对应于图9的时序图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图4，本发明提供一种触控扫描驱动方法包括以下步骤：
步骤1、提供一触控显示面板。
所述触控显示面板优选In Cell式互电容触控显示面板，如图1所示，包括多条横向排列的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)、以及多条纵向排列的触控接收电极Rx(1)、Rx(2)、Rx(3)、至Rx(n)，m、n均为大于2的正整数，触控发射电极与触控接收电极之间相互绝缘。
所述触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)用于传输触控扫描脉冲信号，所述触控接收电极Rx(1)、Rx(2)、Rx(3)、至Rx(n)用于接收触控感应信号。
步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4。
步骤3、实行稀疏触控扫描。
稀疏触控扫描是指一次触控扫描仅向部分触控发射电极发送触控扫描 脉冲信号，所有的触控接收电极Rx(1)、Rx(2)、Rx(3)、至Rx(n)接收触控感应信号；对于同一次触控扫描，相邻两条传送触控扫描脉冲信号的触控发射电极之间至少间隔一条停止工作的触控发射电极；对于相邻两次触控扫描，每次传送触控扫描脉冲信号的触控发射电极不同；以连续数次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
所述稀疏触控扫描可以有多种实施方式。请参阅图5至图8，设N为正整数，i为正整数，所述稀疏触控扫描的具体过程可以为：
如图5所示，第N次触控扫描仅向所有的奇数条触控发射电极即所有的第2i-1条触控发射电极Tx(1)、Tx(3)、Tx(5)、Tx(7)等发送触控扫描脉冲信号，所有的偶数条触控发射电极即所有的第2i条触控发射电极Tx(2)、Tx(4)、Tx(6)、Tx(8)等停止工作，相邻两条触控扫描脉冲信号的时序如图6所示相差两个脉宽。
如图7所示，第N+1次触控扫描仅向所有的偶数条触控发射电极即所有的第2i条触控发射电极Tx(2)、Tx(4)、Tx(6)、Tx(8)等发送触控扫描脉冲信号，所有的奇数条触控发射电极即所有的第2i-1条触控发射电极Tx(1)、Tx(3)、Tx(5)、Tx(7)等停止工作，相邻两条触控扫描脉冲信号的时序如图8所示相差两个脉宽。
设M为大于等于2的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次，也就是说经过连续2次或2次以上的触控扫描，所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)均被扫描到。
相比于现有的触控扫描驱动方法在触控显示面板处于待机状态或正常显示但无触摸状态时仍向所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)逐条提供触控扫描脉冲信号，该稀疏触控扫描方式将触控显示面板处于待机状态或正常显示但无触摸状态时一次触控扫描的信号发送数量减少1/2，从而能够降低功耗。
同理，设N为正整数，i为正整数，所述稀疏触控扫描的具体过程还可以为：
第N次触控扫描极仅向所有的第3i-2条触控发射电极Tx(1)、Tx(4)、Tx(7)、Tx(10)等发送触控扫描脉冲信号，其它的触控发射电极停止工作；
第N+1次触控扫描极仅向所有的第3i-1条触控发射电极Tx(2)、Tx(5)、Tx(8)、Tx(11)等发送触控扫描脉冲信号，其它的触控发射电极停止工作；
第N+2次触控扫描极仅向所有的第3i条触控发射电极Tx(3)、Tx(6)、 Tx(9)、Tx(12)等发送触控扫描脉冲信号，其它的触控发射电极停止工作。这种稀疏触控扫描方式下，相邻两条触控扫描脉冲信号的时序相差三个脉宽。
设M为大于等于3的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次，也就是说经过连续3次或3次以上的触控扫描，所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)均被扫描到。
相比于现有的触控扫描驱动方法在触控显示面板处于待机状态或正常显示但无触摸状态时仍向所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)逐条提供触控扫描脉冲信号，该稀疏触控扫描方式将触控显示面板处于待机状态或正常显示但无触摸状态时一次触控扫描的信号发送数量减少2/3，从而能够降低功耗。
步骤4、实行完整触控扫描。
如图9所示，完整触控扫描是指一次触控扫描即向所有的触控发射电极Tx(1)、Tx(2)、Tx(3)、至Tx(m)逐条发送触控扫描脉冲信号，所有的触控接收电极Rx(1)、Rx(2)、Rx(3)、至Rx(n)接收触控感应信号。如图10所示，完整触控扫描时，相邻两条触控扫描脉冲信号的时序仅相差一个脉宽。
在触摸状态下，该步骤4执行完整触控扫描，能够准确得出触摸点的具体位置，因此并不影响触控显示面板的正常工作及扫描精度。
综上所述，本发明的触控扫描驱动方法，在触控显示面板处于待机状态或正常显示但无触摸状态下实行稀疏触控扫描，即一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，减少了信号收发次数，在触控显示面板处于触摸状态时实行完整触控扫描，从而能够在不影响触控显示面板正常工作及扫描精度的前提下，降低触控显示面板的功耗。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (16)

  1. 一种降低功耗的触控扫描驱动方法，包括以下步骤：
    步骤1、提供一触控显示面板；
    所述触控显示面板包括多条横向排列的触控发射电极、以及多条纵向排列的触控接收电极，触控发射电极与触控接收电极之间相互绝缘；
    步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4；
    步骤3、实行稀疏触控扫描，一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
    对于同一次触控扫描，相邻两条传送触控扫描脉冲信号的触控发射电极之间至少间隔一条停止工作的触控发射电极；对于相邻两次触控扫描，每次传送触控扫描脉冲信号的触控发射电极不同；以连续数次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次；
    步骤4、实行完整触控扫描，一次触控扫描即向所有的触控发射电极逐条发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号。
  2. 如权利要求1所述的降低功耗的触控扫描驱动方法，其中，设N为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
    第N次触控扫描仅向所有的奇数条触控发射电极发送触控扫描脉冲信号，所有的偶数条触控发射电极停止工作；
    第N+1次触控扫描仅向所有的偶数条触控发射电极发送触控扫描脉冲信号，所有的奇数条触控发射电极停止工作。
  3. 如权利要求2所述的降低功耗的触控扫描驱动方法，其中，设M为大于等于2的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
  4. 如权利要求3所述的降低功耗的触控扫描驱动方法，其中，稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差两个脉宽。
  5. 如权利要求1所述的降低功耗的触控扫描驱动方法，其中，设N为正整数，i为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
    第N次触控扫描仅向所有的第3i-2条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作；
    第N+1次触控扫描仅向所有的第3i-1条触控发射电极发送触控扫描脉 冲信号，其它的触控发射电极停止工作；
    第N+2次触控扫描仅向所有的第3i条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作。
  6. 如权利要求5所述的降低功耗的触控扫描驱动方法，其中，设M为大于等于3的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
  7. 如权利要求6所述的降低功耗的触控扫描驱动方法，其中，稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差三个脉宽。
  8. 如权利要求1所述的降低功耗的触控扫描驱动方法，其中，完整触控扫描时，相邻两条触控扫描脉冲信号的时序相差一个脉宽。
  9. 如权利要求1所述的降低功耗的触控扫描驱动方法，其中，所述触控显示面板为In Cell式互电容触控显示面板。
  10. 一种降低功耗的触控扫描驱动方法，包括以下步骤：
    步骤1、提供一触控显示面板；
    所述触控显示面板包括多条横向排列的触控发射电极、以及多条纵向排列的触控接收电极，触控发射电极与触控接收电极之间相互绝缘；
    步骤2、检测并判断触控显示面板是否处于待机状态或正常显示但无触摸状态，若是，则执行步骤3，若否，则转至步骤4；
    步骤3、实行稀疏触控扫描，一次触控扫描仅向部分触控发射电极发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
    对于同一次触控扫描，相邻两条传送触控扫描脉冲信号的触控发射电极之间至少间隔一条停止工作的触控发射电极；对于相邻两次触控扫描，每次传送触控扫描脉冲信号的触控发射电极不同；以连续数次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次；
    步骤4、实行完整触控扫描，一次触控扫描即向所有的触控发射电极逐条发送触控扫描脉冲信号，所有的触控接收电极接收触控感应信号；
    其中，所述触控显示面板为In Cell式互电容触控显示面板；
    其中，完整触控扫描时，相邻两条触控扫描脉冲信号的时序相差一个脉宽。
  11. 如权利要求10所述的降低功耗的触控扫描驱动方法，其中，设N为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
    第N次触控扫描仅向所有的奇数条触控发射电极发送触控扫描脉冲信号，所有的偶数条触控发射电极停止工作；
    第N+1次触控扫描仅向所有的偶数条触控发射电极发送触控扫描脉冲信号，所有的奇数条触控发射电极停止工作。
  12. 如权利要求11所述的降低功耗的触控扫描驱动方法，其中，设M为大于等于2的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
  13. 如权利要求12所述的降低功耗的触控扫描驱动方法，其中，稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差两个脉宽。
  14. 如权利要求10所述的降低功耗的触控扫描驱动方法，其中，设N为正整数，i为正整数，所述步骤3中的稀疏触控扫描的具体过程为：
    第N次触控扫描仅向所有的第3i-2条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作；
    第N+1次触控扫描仅向所有的第3i-1条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作；
    第N+2次触控扫描仅向所有的第3i条触控发射电极发送触控扫描脉冲信号，其它的触控发射电极停止工作。
  15. 如权利要求14所述的降低功耗的触控扫描驱动方法，其中，设M为大于等于3的正整数，以连续M次触控扫描为一个单元执行周期，在一个单元执行周期内每条触控发射电极至少工作一次。
  16. 如权利要求15所述的降低功耗的触控扫描驱动方法，其中，稀疏触控扫描时，相邻两条触控扫描脉冲信号的时序相差三个脉宽。
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